198results about How to "Guaranteed constant temperature" patented technology

The invention relates to a 3D printer based on a fusion accumulation rapid-forming process. The 3D printer is characterized by comprising a transmission mechanism, a worktable, a feeding mechanism and an isolating device. By utilizing a specific driving wheel and driven wheel and line transmission fit manner, the friction coefficient is increased, the problem that a belt wheel slips in a belt transmission process is solved, and transmission motion is accurate and reliable.

The invention relates to a constant temperature dehumidification control method of an air conditioner. The method includes a compressor, a condenser, an outdoor fan, an evaporator, an indoor fan and an auxiliary electric heater. The method comprises the steps of A, enabling the air conditioner to enter a constant temperature dehumidification operation mode, starting the compressor and the auxiliary electric heater, and operating air conditioning system by a refrigerating circulating manner; B, detecting the indoor environmental humidity psi 1 through the air conditioner, and determining the difference to the set humidity psi 2; if the difference is not less than psi, entering step C; if the difference is less than psi, entering step D; C, controlling the indoor fan to rotate at medium rotating speed V, and keeping the auxiliary electric heater and the compressor running; D, controlling the indoor fan to run at a low rotating speed V1, and keeping the auxiliary electric heater and the compressor running; E, stopping the compressor when the indoor environmental temperature psi 1 is reduced to reach the set temperature psi 2, and controlling the indoor fan and the auxiliary electric heater to continuously run for a period of time T, and then stopping the air conditioner. The control method is simple; indoor constant temperature can be ensured while dehumidifying; in addition, the dehumidifying capacity can be increased, the power consumption of the air conditioner in dehumidifying can be decreased, and as a result, the operation efficiency of the air conditioner can be improved.

The invention provides a sample heating apparatus used for a rock impact experiments as rock SHB and combined static-dynamic load and the like. and belongs to the rock mechanics study field. The apparatus comprises an adjusting slideway (9), a locating bolt (10), a resistance wire (11), leveling bolts (12), a bracket (13), a power-supply switch (14), an adjustable insulation bin-door (15), a thermocouple access hole (16), a heating cavity (17), a carbon-fiber reinforced alloy cylinder (18) and an insulation bin (19). The invention adopts the anti-impact and anti-high-temperature carbon-fiber reinforced alloy cylinder, the adjustable insulation bin-door and four leveling bolts at the seat of the apparatus to realize the synchronous processes of preserving the constant high temperature and the loading of impact stress wave during the rock impact experiment. The invention provides a special experimental apparatus for the further rock mechanics study.

The invention discloses a vacuum compression molding device for a carbon fiber composite. The vacuum compression molding device for the carbon fiber composite solves the problem that the performance of a carbon fiber composite molded test piece is poor and comprises an upper mechanism, a lower mechanism, a vacuumizing device, a temperature control device, a pressure control device and a numerical control operation platform. The upper mechanism is installed at the top end of guide posts installed in the lower mechanism through an upper heat conducting plate. Top-pasted type pressure sensors of the pressure control device adhere to the bottom face of the upper heat conducting plate and are connected with the numerical control operation platform through wires. Bottom-pasted type pressure sensors of the pressure control device adhere to a lower heat conducting plate and are connected with the numerical control operation platform through wires. Upper temperature sensors of the temperature control device adhere to the two sides of an upper male die of the upper mechanism and are connected with the numerical control operation platform through wires. Lower temperature sensors of the temperature control device adhere to the two sides of the upper surface of a lower female die and are connected with the numerical control operation platform through wires. The vacuumizing device is installed on a vacuum compression molding device base on the left side of the lower mechanism, and a one-way valve of the vacuumizing device is installed on the lower female die. The numerical control operation platform is installed on the right side of the lower mechanism.

The invention relates to a device for testing hydrothermal variation features of a hydrous porous medium in a freeze thawing process. The device is characterized in that a double-layer system of internal and external model boxes is adopted, a test sample and a variety of sensors are arranged in the internal model box, the external model box mainly plays a heat preservation and thermal insulation role, refrigerating coils arranged on the inner side wall and at the bottom of the external model box are communicated with two external cold baths to control the temperature and integrally heat and cool, and such liquid with low freezing points as alcohol, kerosene and ethanediol can be placed in the interlayer space of the internal and external model boxes to improve the temperature control precision and the constant temperature effect. The device provided by the invention is mainly used for testing the hydrothermal variation feature parameters of the hydrous porous medium in the freeze thawing process, comprising temperature, volume unfrozen water content, matric suction and the like, so that a water feature curve of the hydrous porous medium in the freeze thawing process is drawn. The device provided by the invention has the advantages of simplicity in operation, stable work, high temperature control precision, high overall heating and cooling speed and the like, data are automatically collected by a data collector, and then the hydrothermal variation feature parameters of the hydrous porous medium in the freeze thawing process are effectively tested and the water feature curve is accurately obtained.

The invention discloses a pneumatic self-circulation animal cell culture bioreactor and an application method thereof. The bioreactor is characterized by comprising a large tank, a small tank located in the large tank, a magnetic stirring system located at the bottom of the large tank, a heating system and a controlling system, wherein a sealing cover is arranged at the upper end of the large tank, jackets connected with the heating system are arranged on two sides of the large tank, and a highest liquid level sensor of the large tank is arranged at the upper part in the large tank; and a sealing head is arranged at the upper end of the small tank, an opening is formed in the lower end, the sealing head is fixedly connected in a sealing manner with the sealing cover through a breathing pipe, the upper end of the breathing pipe penetrates out of the sealing cover and is connected with a vacuum air pump and an air pressure pump respectively, the lower end penetrates out of the sealing head and enters the small tank, a cavity used for accommodating a cell carrier is defined by two up-and-down horizontal stainless steel wire mesh boards in the middle of the small tank and the inner wall of the small tank, an upper liquid level sensor of the small tank is arranged above the cavity, and a lower liquid level sensor of the small tank is arranged below the cavity. The pneumatic self-circulation animal cell culture bioreactor has the advantages of good air tightness, simplicity in operation, low contamination rate, good cell quality and high yield.

The invention discloses a silica-gel-containing sponge mattress which comprises 75-90 parts of polyurethane, 15-20 parts of silica gel, 0.2-0.3 part of silicon oil, 0.1-0.2 part of crosslinking agent, 0.2-0.3 part of foaming agent, 0.1-0.15 part of catalyst, 0.05-0.2 part of foam stabilizer and 1.5-2.5 parts of water. The invention also discloses a preparation method of the silica-gel-containing sponge mattress, which comprises the following steps: weighing the raw material components, grinding the silica gel into granules with the granularity of lower than 100 meshes, evenly mixing all the components, putting into a foaming machine, foaming, cooling, and making the mattress according to the conventional method. By adding the silica gel into the raw materials and combining the advantages of the sponge and silica gel, the prepared sponge mattress feels warm in winter and cool in summer, has the effect of keeping the temperature constant, and is not too cold in cold winter or too hot in hot summer. According to the manufacturing method, the silica gel is ground into the granules with the granularity of lower than 100 meshes, and all the raw materials are mixed, foamed, cooled and prepared into the mattress according to the conventional mattress production method. The method is simple in operation sequence and suitable for large-scale production.

The invention relates to a flow line production system of hot melt adhesive particles. The flow line production system comprises a hot melt stirring reaction device, a constant-temperature filter screen device, an extrusion granulating device, a cooling pipeline device, a colloidal particle and water separation spin-drying device, a colloidal particle air-drying packaging device and a cooling water treatment device, wherein the constant-temperature filter screen device can realize alternate switching of two filter screens to improve the production efficiency; the extrusion granulating device consists of a hot melt adhesive material input end, a granulating cavity body, a granulating motor and a colloidal particle cutter and can realize extrusion, granulation and cooling at the same time. The cooling pipeline device consists of a support body, an input end pipe, a plurality of cooling cross tubes, an output end pipe and a plurality of U-shaped joints, can meet requirements for colloidal particle cooling, occupies a small space and is energy-saving and environment-friendly; the colloidal particle and water separation spin-drying device consists of a frame, an outer barrel shell, an inner filter vat, a dehydration screw, a dehydration motor and a front filtered water tank, can finish separation of cooling water and colloidal particles and colloidal particle spin-drying, and is high in treatment effect and ideal in dehydration effect.

The invention relates to an integrated device and method for forming of a carbon fiber composite material and sticky-riveting of the carbon fiber composite material and a metal sheet piece, and belongs to the technical field of composite riveting. The technical problems that gaps exist in connecting of the composite material and a metal material, the composite material and an adhesive layer are damaged due to riveting, and the technology procedure is complicated exiting in the prior art are solved. The carbon fiber composite material and metal material sticky-riveting method applying the device comprises the following steps that a carbon fiber prepreg is subjected to die-filling; the carbon fiber prepreg is subjected to gelling; the gelled carbon fiber prepreg and a metal sheet are subjected to die-closing and pressurizing; the carbon fiber prepreg and the metal sheet piece are subjected to heating curing; cooling and die-releasing are conducted; and burrs and flashings at the edge parts when a carbon fiber composite material plate and a metal sheet sticky-riveting test piece are formed are removed. According to the integrated device and method for forming of the carbon fiber composite material and sticky-riveting of the carbon fiber composite material and the metal sheet piece, the effect that bonding can be completed while the carbon fiber composite material is subjected to die-pressing forming is achieved; and the bonding property is effectively improved, and the bonding strength is improved.

The invention relates to a feeding device for seamless ventilation ducting fabric production. The feeding device comprises a concave tank body, wherein a bracket is arranged on the tank body; a clamping roll group I and a scraper group I are arranged on the bracket; a slidable clamp device is further arranged on the bracket; a clamping roll group II and a scraper group II are arranged on the clamp device; base cloth can pass through a gap between the clamping roll group I and the clamping roll group II and a gap between the scraper group I and the scraper group II; each of the clamping roll group I and the clamping roll group II comprises at least one clamping roll; each of the scraper group I and the scraper group II comprises at least one scraper which adopts a steel wire; a soaking and lifting device capable of lifting relative to the tank body is arranged on the bracket; and a heat conduction box for heating size is arranged on the inner wall of the tank body. The feeding device can perform uniform feeding on seamless ventilation ducting fabric, the gap between the two clamping roll groups and the gap between the two scraper groups are adjustable, so that the requirement for different thicknesses of the size on the base cloth can be met, and the production efficiency is improved; and the scrapers adopt the steel wires, accordingly, the cost is lower, and the replacement is convenient.

The invention discloses a plastics sucking molding machine and a plastics sucking molding method. The plastics sucking molding machine comprises a rack, an upper mold, a lower mold, a heating system and a control device. The upper mold is a movable mold. Driven by a lifting device, the upper mold can be in buckled sealing with the lower mold. The cavity wall of the upper mold is a hollow structure. The heating system heats an upper end face of a workpiece inside the mold through heat conduction to the cavity wall of the upper mold. The lower mold is a positioning mold, and the cavity wall of the lower mold is a hollow structure. The inner cavity wall of the lower mold is provided with multiple through holes. The heating system heats a lower end face of the workpiece inside the mold through heat conduction to the cavity wall of the lower mold. A vacuum suction device can generate vacuum suction to the lower end face of the workpiece through the multiple through holes of the lower mold. The plastics sucking molding machine and the plastics sucking molding method provided by the invention have advantages of low energy consumption, high heat conduction efficiency, attractive and unified appearance of finished products and the like.

The invention discloses a high-efficient and energy-saving aluminum rod mixing heating furnace applied to the aluminum extrusion process. The heating furnace comprises a single-rod furnace and a multi-rod furnace which is integrated with the single-rod furnace. The single-rod furnace comprises a first furnace body, a heating zone arranged in the first furnace body, and spray guns which are used for heating the single-rod furnace and are respectively arranged on the upper part and lower part of the first furnace body. The multi-rod furnace comprises a second furnace body which is arranged on one side of the first furnace body and integrated with the first furnace body, and a preheating zone which is in communication with the heating zone and is arranged in the second furnace body. The first furnace body and the second furnace body are provided with a pipe body which is used for communicating the heating zone with the preheating zone, and the pipe body is provided with a pressure sensor. The high-efficient and energy-saving aluminum rod mixing heating furnace has the advantages that the energy is saved, the heat loss is small, the preheating time is short, the heating efficiency of aluminum rods is high, the daily maintenance and repairing are applicable, and the effect that the aluminum rods are in gradient heating is realized.

The invention relates to a temperature-compensating oscillator device which can keep the temperature constant. The oscillator device comprises a shell, a circuit board arranged inside the shell, a suspended temperature-compensating oscillator arranged on the circuit board and a heating control circuit arranged on the circuit board. The shell is vacuumed and is provided with a plurality of conductive platforms at intervals for jointly supporting the circuit board and a plurality of exposed conductive connection points which are electrically connected with one end of the conductive platforms so as to electrically connect each conductive connection point with the circuit board by each conductive platform. By virtue of the high erection of the circuit board and the small contact area between the circuit board and conductive platform, the thermal conduction of the heat generated by the heating control circuit to the shell is reduced; in addition, the vacuumed shell can effectively eliminate thermal convection and function as a thermal radiation blocking layer by being matched with a gold-plated layer on the surface of the shell, thus guaranteeing that the interior of the shell stays at the constant temperature status. The temperature-compensating oscillator device can effectively reduce thermal conduction and block the thermal convection, thus keeping the temperature-compensating oscillator at stable working temperature, and being rather practical.

The invention discloses a catalytic combustion waste gas treatment system for medium and small air volumes. The catalytic combustion waste gas treatment system for the medium and small air volumes issequentially provided with a dry type filtering device, an intake pipeline, a heat exchange type catalysis and oxidation integrated machine, an exhaust pipeline, an induced draft fan and a chimney. Anintake valve is arranged at the intake end of the heat exchange type catalysis and oxidation integrated machine. A safety control system is arranged between the intake valve and the dry type filtering device. The safety control system communicates with a coldness supplementation system and a bypass system. An emergency discharge system is arranged on the heat exchange type catalysis and oxidationintegrated machine. A PLC control cabinet is electrically connected with the whole waste gas treatment system. The catalytic combustion waste gas treatment system for medium and small air volumes islow in power and small in energy consumption and meets various complicated working conditions; through the additional arrangement of the safety control system and a coldness supplementation diluting system, full-process monitoring and data storage are conducted on temperature and pressure in the combustion process, and self-adjustment of heating power is conducted according to the combustion statein the combustion process; and in this way, the system operation safety and stability are greatly improved.

The invention relates to a feeding system for production of seamless air duct cloth. The feeding system comprises a tank body, wherein a bracket is arranged on the tank body; a clamping roller group I and a scraping blade group I are arranged on the bracket; a slidable clamp device is further arranged on the bracket; a clamping roller group II and a scraping blade group II are arranged on the clamp device; each of the clamping roller group I and the clamping roller group II comprises at least one clamping roller; each of the scraping blade group I and the scraping blade group II comprises at least one scraping blade; the end, in contact with base cloth, of each scraping blade is inclined in the moving direction of the base cloth; the included angle between each scraping blade and the base cloth is smaller than 90 degrees; a liftable prepreg lifting device is arranged on the bracket; a heat conduction box for heating a sizing agent is arranged on the inner wall of the tank body. The feeding system can uniformly feed the seamless air duct cloth, can adjust the interval between two clamping roller groups as well as between the two scraping blade groups, is reliable in scraping, can meet the requirement for different thicknesses of the sizing agent fed on the base cloth and improves the production efficiency; the scraping blades are connected with compression springs, so that damage to the base cloth can be reduced.

The invention discloses a reaction device for preparing a magnetic nano material through ultrasound enhancement cooperating with magnetic field induction. The reaction device is characterized by comprising a reaction cylinder; a feeding device and a stirring device are arranged at the upper end of the reaction cylinder, a discharge port is formed in the lower end of the reaction cylinder, a coil is wound outside the reaction cylinder, an end line of the coil is connected with a power supply, a power supply switch and a sliding rheostat in series to form a control loop, and at least one frequency-adjustable ultrasonic generation device is arranged at the bottom of the reaction cylinder. The reaction device is reasonable in structure; compared with an ordinary reaction device, the reaction device can solve the problems that aeolotropic magnetic nano particles are difficult in synthesis, ordered structures are not easy to control, morphology uniformity is poor and the nano particles are extremely easy to agglomerate and the like, and has the advantages of controllable magnetic field and ultrasonic field strength, high reaction speed, high reaction efficiency, low energy consumption and the like; and moreover, the magnetic nano material synthesized by using the reaction device has stronger magnetic performance than a material synthesized by an ordinary method.

The invention relates to a graphene composite rare earth modification hypo eutectic Al-Si-Mg casting alloy and a preparing method thereof. The alloy comprises chemical components including, 4.5%-10.5%of Si, 0.25%-0.70% of Mg, 0.21%-1.21% of Ce, 0.05%-0.20% of Ti, 0.04%-0.25% of Fe, 0.03%-0.25% of Cu, 0.03%-0.25% of Mn, 0.00%-0.25% of Cr, 0.00%-0.10% of Ni, 0.00%-0.35% of Zn, 0.00%-0.15% of Sn, 0.05%-0.15% of Zr, 0.05%-0.1% of Be, 0.05%-0.1% of Pb, 0.001%-0.005% of graphene and the balance Al. Due to the fact that the modifying element Ce, the modifying element Ti and the trace of graphene arematched with other metal elements, a vacuum melting technology is adopted, and the application range of an as-cast Al-Si-Mg alloy material is enlarged.

The invention relates to a device for measuring outer side soil pressure of a shield tunnel. The device comprises an oil bag, a silica gel O-shaped sealing ring, a water swelling rubber sleeve, a cylinder barrel, a piston, a steel wire rope used for pulling the piston, a piston mounting supporting part used for mounting, an electric control system and an oil supply unit, wherein the oil bag is used for sensing soil body deformation and transmitting the soil pressure and engaged with the cylinder barrel through a thread, and compresses the silica gel O-shaped sealing ring to seal hydraulic oil;an outer thread and an inner thread are arranged on the lower part of the cylinder barrel, the outer thread is matched with an inner thread of a hoisting grouting hole, and the inner thread is connected with the piston mounting supporting part; a convex groove used for fixing the piston is formed in the lower position of the cylinder barrel, threads at the bottom and the top of the cylinder barrel are opposite in direction, and the thread at the bottom of the cylinder barrel and the inner thread of the hoisting grouting hole are the same in direction; and the piston is located in the cylinderbarrel and comprises an upper piston part, a formulating nipple, a heating rod, a pressure liquid level assembled temperature transmitter, an oil delivery pipe, an exhaust pipe and a lower piston part.

The invention provides a technical scheme of a constant-temperature shaking table unit. The scheme comprises a shaking table body, a vibration source connected with the shaking table unit and a constant-temperature device on the shaking table. The scheme is that the shaking table is a disk body or a column body with a round or polygonal cross section; the circumference of the shaking table body is uniformly provided with multiple reaction cabins; each reaction cabin is provided with a respectively independent sealing cover; the bottom surface inside each reaction cabin is provided with an insulation board; and in addition, a shaking table rotating motor is coaxially and fixedly connected with the shaking table body. By adoption of the constant-temperature shaking table unit in such structure, constant temperature and needed vibration of the whole shaking table and the reaction cabins are not only guaranteed, but reaction containers needed for reaction also can be placed into the reaction cabins randomly for incubation reaction, and the reaction containers after finishing the reaction also can be taken out randomly from the reaction cabins to realize the random and timely incubation operations.

The invention discloses a new energy vehicle battery system with a temperature control function. The new energy vehicle battery system comprises a battery pack formed by arranging single batteries in rows, wherein an upper portion of the battery pack is provided with an upper hoop, and a lower portion of the battery pack is provided with a lower hoop; bolt holes are also formed in the upper hoop and the lower hoop, the lower hoop is fixed on the bottom surface of a battery box body by virtue of a bolt, and the upper hoop is fixed on an upper cover of the box body by virtue of a bolt; and a cooling pipeline is arranged between two adjacent single batteries, an inlet and an outlet of the cooling pipeline are led out of the battery box body and connected to a corresponding cooling water supply system. The new energy vehicle battery system with the temperature control function has a heating function and a cooling function, can effectively ensure a constant-temperature state of the battery, and ensures the high efficiency and stability of the battery. The new energy vehicle battery system is reasonable in structure, convenient to assemble and good in shock absorption effect.

The invention discloses a pneumatic self-circulation animal cell culture bioreactor and an application method thereof. The bioreactor is characterized by comprising a large tank, a small tank located in the large tank, a magnetic stirring system located at the bottom of the large tank, a heating system and a controlling system, wherein a sealing cover is arranged at the upper end of the large tank, jackets connected with the heating system are arranged on two sides of the large tank, and a highest liquid level sensor of the large tank is arranged at the upper part in the large tank; and a sealing head is arranged at the upper end of the small tank, an opening is formed in the lower end, the sealing head is fixedly connected in a sealing manner with the sealing cover through a breathing pipe, the upper end of the breathing pipe penetrates out of the sealing cover and is connected with a vacuum air pump and an air pressure pump respectively, the lower end penetrates out of the sealing head and enters the small tank, a cavity used for accommodating a cell carrier is defined by two up-and-down horizontal stainless steel wire mesh boards in the middle of the small tank and the inner wall of the small tank, an upper liquid level sensor of the small tank is arranged above the cavity, and a lower liquid level sensor of the small tank is arranged below the cavity. The pneumatic self-circulation animal cell culture bioreactor has the advantages of good air tightness, simplicity in operation, low contamination rate, good cell quality and high yield.

The invention relates to the technical field of marine food products, in particular to a low-pressure high-temperature steamer for holothurian processing. The low-pressure high-temperature steamer comprises a flat bottom hot water pot, an electromagnetic valve, a steamer body and a vacuum pump, wherein the steamer body is fixedly arranged right above the flat bottom hot water pot through a three-leg support frame; the flat bottom hot water pot is communicated with the inside of the steamer body through the electromagnetic valve; steam boxes stacked layer by layer are placed in the steamer body; a steam circulation mechanism is further arranged inside the steamer body; the vacuum pump is fixedly arranged on the top end of the steamer body; a control device is arranged beside the steamer body; the electromagnetic valve, the steam circulation mechanism and the vacuum pump are respectively electrically connected with the control device. According to low-pressure high-temperature steamer, ahot water pot is separated from the steamer body through the electromagnetic valve; the problem that the high-temperature water steam cannot be generated in a low-pressure environment is solved; meanwhile, the water steam cyclically flows in the steamer through the steam circulation mechanism; and the bleaching efficiency is improved.

The invention discloses a constant-temperature illuminating lamp, which belongs to the field of constant-temperature devices. The constant-temperature illuminating lamp comprises a lamp holder, and an illuminating lamp tube, an infrared radiation heating bulb and a temperature sensor which are arranged on the lamp holder, wherein a single-chip microcomputer control circuit is arranged inside the lamp holder; and the temperature sensor is used for controlling the illuminating lamp tube and the infrared radiation heating bulb to work respectively through the control circuit. Automatic constant-temperature control is realized via the sensor; and meanwhile, the constant-temperature illuminating lamp has the advantages of illuminating function, simple structural design and high practicability.

The invention discloses a graphene synthetic apparatus. The graphene synthetic apparatus comprises a box body, wherein a material inlet is formed in a top plate of the box body, the side wall of the material inlet is fixedly connected with a feeding funnel, the material inlet is provided with a material control mechanism, the upper surface of a box body bottom plate is fixedly connected with a heater and a motor, the inner side wall of the box body is fixedly connected with a horizontal plate, an output shaft of the motor penetrates through a through hole on the side wall of the horizontal plate and is fixedly connected with a plurality of stirring rods, the outer side of the stirring rod is provided with a loading bucket, the lower surface of a loading bucket bottom plate is fixedly connected to the upper surface of the horizontal late, a first material outlet hole is formed in the loading bucket bottom plate, a second material outlet hole corresponding to the first material outlet hole is formed in the side wall of the horizontal plate, and the side wall of the second material outlet hole is fixedly connected with a filter plate with a plurality of filter holes. The graphene synthetic apparatus can effectively control the feeding speed of materials, can also facilitate the synthesis of the graphene, and is worth of popularization.

The invention discloses an electric vehicle battery system having a heating function. The electric vehicle battery system comprises a box and an upper box cover, wherein the upper box cover is fixedly connected to the top end of the box through bolts in a sealed manner, and a battery formed by multiple columnar cells is arranged in the box; the columnar cells are fixed on a cell rack, the cell rack comprises an upper plate and a lower plate which are parallel, and the columnar cells are vertically fixed between the upper plate and the lower plate; the upper plate of the cell rack is fastened on a mounting plate on the inner wall of the box through bolts; spiral cooling pipes are arranged on the peripheries of the columnar cells respectively, and PTC heating pieces are arranged in the box. When the temperature is higher than a set value, circulating cooling water is introduced into the spiral cooling pipes to cool the cells; when the temperature is lower than a set value, the PTC heating pieces are powered on to increase the temperature in the box. The electric vehicle battery system is provided with a heating device and a cooling device simultaneously, thereby being capable of guaranteeing the constant-temperature state and the efficient stability of the cells.

The invention discloses a shell for a portable constant-temperature box. The shell comprises a shell body, and a heating base, a circuit board, a second magnet, a coil and a first magnet arranged in the shell body from top to bottom; a wiring column is connected between the coil and the heating base; a wheel shaft is arranged at the bottom end of the shell body; the coil coats the wheel shaft; the wheel shaft penetrates through the shell body, and two ends of the wheel shaft are respectively connected with tires; the shell body is divided into an upper shell body for loading an insulation object and a lower shell body for loading a constant-temperature circuit and the coil by the heating base; and a box cover for covering the shell body is arranged at the top end of the upper shell body. The shell enables an insulation box to be used indoors and outdoors.

The invention relates to the field of battery manufacturing, in particular to a heating device for bus-bar manufacturing. According to the technical scheme, the heating device for bus-bar manufacturing comprises a die; the die comprises molding grooves, the heating device further comprises a heat supply assembly, and the heat supply assembly comprises a constant-temperature heat supply assembly body used for stably and continuously providing heat for the die and a fast heat supply assembly body used for heating the die fast; and the fast heat supply assembly body is connected with the die through heating channels arranged in the die. The heating device for bus-bar manufacturing does not need to be soaked in a lead pot in the heating process, lead residue generation is avoided, the heating device comprises the constant-temperature heat supply assembly body and the fast heat supply assembly body, and molten lead treatment heat efficiency is high.

The invention relates to a method for measuring earth pressure on the outer side of a shield tunnel. The adopted measurement device comprises an oil bag, a silicon rubber O-shaped sealing ring, a water-swelling rubber sleeve, a cylinder barrel, a piston, a steel wire rope for pulling the piston, a piston installation support component for installation, an electronic control system and an oil supply unit, wherein the oil bag is used to sense soil deformation and transfer earth pressure, is meshed with the cylinder barrel by threads, and presses the silicon rubber O-shaped sealing ring to realize the sealing of hydraulic oil; the lower part of the cylinder barrel is provided with an external thread and an internal thread, the external thread is matched with the internal thread of a hoistinggrouting hole, and the internal thread is connected with the piston installation support component; a convex groove for fixing the piston is arranged at a lower position of the cylinder barrel, the threads at the bottom and the top of the cylinder barrel have opposite directions, and the thread at the bottom of the cylinder barrel has the same direction as the internal thread of the hoisting grouting hole; and the piston is located in the cylinder barrel, and comprises an "upper" part of the piston, a formulation pair wire, a heating rod, a pressure liquid level set temperature transmitter, anoil delivery pipe, an exhaust pipe and a "lower" part of the piston.

The invention relates to an intelligent constant-temperature and constant-humidity device based on Internet of Things. The intelligent constant-temperature and constant-humidity device comprises a top plate, a support mechanism and two drive plates, wherein the support mechanism comprises two support units, each support unit comprises a support plate, a light-transmitting plate, a light control module, a rain sheltering plate, a curtain and two hinge units, each light control module comprises a telescoping unit, a cleaning strip and two cleaning components, and each cleaning component comprises a movable block, a fixed block, a telescopic rack, a hinge block and two connecting rods; each drive plate is provided with two drive units, and each drive unit comprises a lifting unit, a T-shaped block, a lantern ring, a pull rod and a support rack. The intelligent constant-temperature and constant-humidity device has the advantages that simple and conventional components are used in the light control modules, performance is guaranteed, and production cost is lowered; in addition, the drive units drive the rain sheltering plates to rotate downwardly to allow the curtains and the light-transmitting plates to be isolated from rain and snow so as to prevent the rain and snow to absorb heat, and a constant-temperature state inside the device is guaranteed.

The invention discloses a sulfur hexafluoride gas sampling device, comprising a base and a shell which is provided with an external equipment interface and is arranged on the base. A gas washing bottle, a sampling bottle and a multi-way valve with at least four connection openings are arranged in the shell; a hydrogen fluoride gas colorimetric mechanism is arranged outside the shell; the four connection openings of the multi-way valve are respectively connected with the connection opening of the external equipment of the shell, the gas washing bottle, the sampling bottle and the hydrogen fluoride gas colorimetric mechanism through a gas guide pipe; and an operation handle for opening and closing each connection opening of the multi-way valve is externally arranged on the shell. The hydrogen fluoride gas colorimetric mechanism disclosed by the invention has the advantages of compact and reasonable structure, beautiful and elegant appearance, simple and clear operation process, convenience for maintenance, flexibility in use and relatively individual functions, and has functions of carrying out hydrogen fluoride gas colorimetric detection, displaying pressure of a sampled gas on a pressure meter during sampling, assisting in heating in a process of vacuumizing the sampling device and the like. Therefore, the vacuumization is accelerated and residual matters in a container of the sampling device are released completely, so as to achieve a real numerical value which is the same of the numerical value of an original gas when the sampling is carried out.