515results about How to "Won't freeze" patented technology

The invention relates to a high-pressure fog gun machine which comprises a base, a top frame arranged on the upper surface of the base, a rotating disc arranged on the top frame, a cylinder used for atomization, a V-shaped supporting frame fixed to the rotating disc and used for supporting the cylinder, and a push rod mechanism fixed to the rotating disc and used for driving the cylinder to swing the head vertically. A motor, a high-pressure water pump and a water tank are arranged in the base. An input port of the high-pressure water pump is connected with the water tank through a water suction pipe. A draught fan, a high-pressure water storage tank and at least two nozzles arranged at the front end of the high-pressure water storage tank are arranged in the cylinder. The high-pressure water storage tank is connected with an output port of the high-pressure water pump through a high-pressure water conveying pipe. The nozzles are high-pressure ball valves. According to the high-pressure fog gun machine, the nozzles of the machine are not likely to be blocked, the atomization degree is high, the atomization effect is good, the injection range is large, the distance is long, the automation degree is high, and the high-pressure fog gun machine is suitable for industries such as agriculture and forestry irrigation water replenishing or insecticide spraying, hospital disinfection and sterilization and dust removing, smoke removing and purifying for a construction site or municipal administration or fire protection.

The invention discloses a printing and dyeing drying equipment integrating dust removal and drying. A rotating shaft, the outer surface of the first rotating shaft is sleeved with unwinding rollers. The printing and dyeing drying equipment integrating dust removal and drying can effectively ensure the cleanliness of the fabric, effectively maintain the working environment of the equipment, avoid dust falling into the fabric again, and cause the fabric to be polluted again, effectively making the fabric quality better. Effectively spray the dye evenly onto the second electric printing and dyeing roller, which ensures the automation of the equipment, ensures the stable flow of the dye liquid, and avoids the excessive impact of the dye during stirring, which causes the equipment to shake, effectively It ensures the drying of the fabric, solves the problem of the fabrics sticking together, improves the quality of the fabric, and saves the drying time.

The invention discloses a video effect processing method and device, and is applied to the technical field of video processing. The method comprises the steps of: starting video recording; in a videorecording process, performing effect preview processing on a currently acquired video frame, and generating an effect preview image when recording; in the video recording process, displaying the effect preview image when recording in real time; performing recording effect processing on the video frame acquired in the video recording process, and generating an effect video frame, wherein the recording effect processing precision is greater than the effect preview processing precision; and, after the video recording process is ended, obtaining an effect video file composed of the effect video frame. By means of the video effect processing method and device disclosed by the invention, the effect preview image can be smoothly displayed to users in the effect video recording process; and the recorded effect video file also has good effect.

The invention relates to the field of decoration devices, in particular to a painting device and method with lifting and spraying-adaptive for indoor decoration. The device comprises a platform cart,and further comprises a controller, a lifting mechanism and a spraying mechanism, wherein the lifting mechanism is arranged at the top of the platform cart to support lifting of the spraying mechanism; the lifting mechanism comprises a lifting plate, a pushing assembly and a jacking assembly; the spraying mechanism is arranged at the top of the lifting plate for painting the indoor wall surface; and the spraying mechanism comprises a storage barrel, a material receiving pipe, an atomizing nozzle, an extrusion assembly and a conveying assembly, wherein the pushing assembly and the conveying assembly are electrically connected with the controller. According to the painting device and method with lifting and spraying-adaptive for the indoor decoration, the wall surface can be synchronously sprayed when the atomizing nozzle rises, so that the power consumption is small, and in the lifting interval, spraying is in an on-off state, and waste of paint materials is effectively avoided; and meanwhile, when the air temperature is low, the anti-curing function is achieved, and thus the paint spraying efficiency is improved.

The invention relates to the technical field of air conditioners, and aims to solve the problems that an indoor unit, outdoor unit and unit connecting tube of an air conditioner are easy to freeze, and the like. Therefore, the invention provides a control method for the air conditioner, the air conditioner comprises a compressor and an outdoor unit, and the control method comprises the steps thata coil temperature of the indoor unit is obtained; and the frequency of the compressor is selectively adjusted according to the coil temperature of the indoor unit. The control method for the air conditioner has the advantages that the operating frequency of the compressor can be adjusted according to the temperature interval in which the coil temperature of the indoor unit is located, so as to avoid the freezing of the indoor unit of the air conditioner, thereby effectively solving the problem of the freezing of the indoor unit, and the stability and reliability of the air conditioner operation are also improved.

The invention relates to an automatic cleaning device for a solar water heater. The automatic cleaning device for the solar water heater comprises a trolley, a distribution box, a circulating water tank, a steam water tank, a circulating water pump, a steam water pump, an electric heating evaporator, an electromagnetic descaling device, a trailer, a drying air pipeline, a steam pipeline, a constant-pressure exhaust valve, a filter, an air extracting pump, an electric heater and a connecting pipe. According to the automatic cleaning device for the solar water heater, the electromagnetic descaling technology is adopted, safety and high efficiency are achieved, corrosion for the water heater and damage to human body due to reagent residue after descaling of a traditional chemical reagent are avoided; and meanwhile, high-pressure steam is adopted to clean the surface of a heat collecting pipe, and drying with hot air is conducted; and the thermal decomposition function of steam is adopted, the sticky property of sediment and stain is quickly dissolved, so that the sediment and stain are separated from the heat collecting pipe, water consumption is reduced, and the surface of the heat collecting pipe is not damaged.

The invention relates to a salt-resistant type low-temperature foam lifting drainage chemical additive, and a preparation method and an application thereof. The chemical additive is prepared through mixing cocamidopropylamine oxide, dodecyl polyglucoside, lauryl hydroxypropyl sulphobetaine and ethylene glycol according to a certain proportion uniformly. The chemical additive cannot be frozen under the lowest temperature condition in winter in various gas fields in China, satisfies site ground construction requirements and has a wide application prospect. Moreover, the chemical additive does not have stimulus and has excellent salt resistance; and under the condition that the mineralization degree is 200000 milligrams / liter, the chemical additive does not generate precipitation and still has excellent foaming and liquid carrying capabilities.

The invention discloses a method for preparing composite modified starch. The method comprises the following steps: 1) slurrying a raw material, namely a natural starch, and adjusting pH value of the natural starch by caustic alkali; 2) adding an oxidizing agent into the starch slurry to carry out oxidation modification treatment; 3) filtering, washing and drying the starch slurry into a powdered semi-finished product for standby; 4) spraying a catalyst and composite phosphate into the semi-finished product to carry out dry modification treatment; and 5) cooling the semi-finished product to a temperature of between 25 and 35 DEG C, adjusting the pH value of the semi-finished product to 6-8 to carry out secondary drying, and crushing the product to obtain a finished product. The product obtained by the method greatly improves dispersibility of the starch slurry, can be easily stewed with stable slurry, cannot be frozen, can completely replace the chemical synthetic slurry to size pure coarse cotton and medium yarns, and can replace the synthetic slurry in large scale to size high grade cotton yarns and union yarns, thereby greatly reducing yarn sizing cost, facilitating desizing, and contributing to environment-friendly waste water treatment.

The invention relates to a water pump control method and a water pump control system in a rail vehicle water supply system for controlling a water pump to continuously operate. When tail-end water equipment on a vehicle is closed, water pumped by the water pump flows back to a water tank through a bypass pipeline. When the water pump control system is powered down, the water pump stops operating, a water supply pipeline is cut off, and stored water in the water supply pipeline is drained out of the vehicle by opening a draining pipeline. The water pump control system comprises a process of detecting the state of continuous water flow in the water supply pipeline so as to further judge whether the water supply pipeline has leakage or not. The control system ensures that the water pump can be continuously operated regardless of whether the tail-end water equipment on the vehicle is used or not by arranging the bypass pipeline and a bypass valve and guarantees that the water supply pipeline cannot be frozen in winter. Moreover, the control system is also additionally provided with the draining pipeline and a draining electromagnetic valve so as to guarantee that when the control system is powered down and the water pump does not work, the water in the water supply pipeline can be completely drained out of the vehicle and cannot be stored in the water supply pipeline, thereby the antifreezing capacity of the water pipeline in a pump room in winter is improved.

The invention relates to bathroom accessories, in particular to a ceramic valve plug with functions of opening and closing, throttling and feeding water and a thermostatic valve provided with the ceramic valve plug. The ceramic valve plug comprises an upper plate and a lower plate, wherein four arc-shaped grooves are symmetrically formed in a circumference of the front side of the upper plate; two water inlet through holes and two water outlet through holes are formed in the front side of the lower plate; when the upper plate and the lower plate rotate relatively, the different position corresponding relations of the arc-shaped grooves and the water inlet through holes and water outlet through holes are realized, so that the functions of opening and closing, and water feeding are realized. The ceramic valve plug can be arranged at a cold-hot water inlet end, so that after a valve is closed, water is not left in a water mixing cavity, a valve plug cannot be frozen; and meanwhile, the valve plug integrates the water feeding function, so that the valve plug is convenient to assemble and use, and by the adoption of the ceramic valve plug, a solar water heater can be used conveniently.

The invention mainly discloses a non-pressure bearing split type light control solar water heater which mainly comprises a heat collector and a light control integrator. A water tank and the heat collector are arranged in a split manner, and the whole system is controlled by the light control integrator. The water tank is a non-pressure bearing insulation water tank, the heat collector consists of a plurality of vacuum tubes which are transversely arranged, and the position of the heat collector is higher than that of the water tank. The solar water heater is composed of the heat collector, the light control integrator, a light sensor, a main aqueduct and a branch aqueduct, a water returning device, a circulating pump, a solenoid valve, the water tank and the like parts, which can achieve integration of the solar water heater and the building, the independent installation and greatly improved forced circulating heat efficiency; the main aqueduct and the branch aqueduct can cause the heat collector to realize thorough exchange between the cold water and the hot water, the light control integrator can cause the whole system to operate automatically and aperiodically, which greatly improves the work efficiency of the system; the water returning device can cause the hot water in the vacuum tubes to return to the water tank for use, prevent frost crack of the vacuum tubes of the heat collector under the conditions of low light intensity, low temperature or ultra-low temperature, and greatly relieve the thermal efficiency reduction caused by scale deposit generated in the vacuum tubes.

The invention discloses a treatment method for casing channeling and casing leakage of an oil and gas production well. The treatment method comprises the following steps that S1, a first plugging agent, a second plugging agent and a third plugging agent are configured correspondingly; S2, clear water is injected into a casing to measure the water absorbing index, and the using quantity of the plugging agents is predicted preliminarily according to the water absorbing capacity of a stratum; S3, a casing gate is closed, an oil well pipe string or a polished wellbore are trapped in, the first plugging agent and the second plugging agent are extruded and injected into the casing successively, and after injecting is completed, still standing is conducted for four hours; S4, the third plugging agent is injected into the casing, then the clear water is injected into the casing so as to jack the third plugging agent to the leakage point of the casing, and a reserved mortar face is located on the leakage point of the casing; S5, the well is shut down for waiting on cement setting for 72 hours; and S6, after the process of waiting on cement setting is completed, an unloading well opening adopts the pipe string to detect a mortar plugged face, and then plug drilling is conducted. According to the treatment method for casing channeling and casing leakage of the oil and gas production well,the one-time success rate for treatment of casing channeling and casing leakage caused by damage of the oil and gas production well, especially the shallow casing, reaches 90% or above, the types andthe using quantity of treatment agents are less, and the cost is reduced.

The invention relates to a method for improving a single-layer oil tank into a double-layer oil tank. On the basis that the inner wall of the buried single-layer steel oil tank in service is derusted, an anti-corrosion reinforcing coating, a 3D through gap layer and a glass steel inner tank are sequentially manufactured, and the single-layer oil tank is quickly improved into the glass steel double-layer oil tank with a through gap layer space. The 3D through gap layer is communicated with a tank top monitoring well, and sealing performance of the inner tank and the steel outer tank in service can be monitored all day long. The inner surface of the glass steel inner tank is coated with an anti-static layer which makes direct contact with stored liquid, the anti-static layer is connected with an original steel storage tank, and the original steel single-layer storage tank is grounded so that electrostatic hazards can be avoided. The inner tank is made from a glass steel material formed by mixing resin and glass fiber. The oil tank improvement method has the advantages of being good in safety, high in strength, convenient to manufacture and the like, corrosion resistance of the oil tank is improved, the overhaul frequency is reduced, the service life is prolonged, and improvement cost is reduced.

The present invention discloses a frozen dessert. A frozen dessert thickening agent includes gellan gum and carrageenan, optionally further comprises xanthan gum and locust bean gum, and optionally further comprises sodium alginate. The frozen dessert is flexible and unique in taste, has a taste of ice cream mousse when eaten at a freezing condition (-3 DEG C to -8 DEG C), and has a taste of jelly when eaten at a molten state (at room temperature).

The invention relates to an environment-friendly water-soluble adhesive dust inhibitor and a preparation method thereof. The environment-friendly water-soluble adhesive dust inhibitor comprises the following components in percentage by weight: 0.1-2% of sodium lactate, 0.1-6% of a pregelatinized starch, 2-10% of glycerinum, 0.1-5% of an adhesive, 1-5% of urea, 0.2-2% of a polyacrylic resin, 0.1-1%of a surfactant, 0.1-3% of an emulsion, 0.02-0.5% of texanol, 0.1-2% of an environment-friendly pigment and the balance of water, and the inhibitor is finally prepared through stirring and mixing. Compared with the prior art, the inhibitor is applied to dust inhibition and the like in exposed fields such as mine tailing ponds, city exposed grounds, municipal construction, coal transportation andstorage yards, is not limited by use fields, and is capable of reducing environment pollution and reducing resource waste.

The invention provides a freeze preventing device in the waterway system of a fire engine, which is mainly applied on fire engines. The freeze preventing device includes a water tank, a water pump, a water pumping pipeline between the water pump and the water tank, and a control valve, a fire monitor body, and a fire hose arranged on the water pumping pipeline. The rotating shaft of the water pump is connected with the output shaft of the engine of the fire engine by a power taker, a water pipe is connected between the outlet of the water pump and the inlet of the fire monitor body, a control valve is arranged on the water pipe, the water pipe between the outlet of the water pump and the control valve is connected with the fire hose. The freeze preventing device also includes an air compressor arranged on the vehicle body, and an air compressing control valve serially connected on the outlet pipeline. The air compressing control valve is communicated with the cavity chamber of the water pump through a pipeline, a heat-preserving drainage valve which is heated by the electricity provided by a vehicle battery is arranged on the bottom of the water pump. The freeze preventing device in the waterway system of a fire engine of the invention can prevent the fire engine hose and the fire monitor body from being frozen, and ensures that the hose and the fire monitor can be used normally during low-temperature severe cold.

The invention discloses a refrigerator with an instant refrigeration function, and relates to the technical field of refrigeration devices. The refrigerator is designed to solve the problems that an existing refrigerator with the instant refrigeration function is high in cost, poor in instant refrigeration effect and the like. The refrigerator comprises a controller, an interchangeable temperature chamber, an air outlet formed in the rear wall of the interchangeable temperature chamber, and a drawer arranged in the interchangeable temperature chamber. An instant refrigeration area is arranged in the interchangeable temperature chamber. A draught fan for blowing cold air into the interchangeable temperature chamber from the air outlet is arranged in an air duct of the interchangeable temperature chamber. Meanwhile, the invention provides a control method for the refrigerator. The instant refrigeration area is arranged in the interchangeable temperature chamber of the refrigerator, the controller controls and increases the air volume of the draught fan at the air outlet, and therefore the cooling speed of surfaces of objects in the instant refrigeration area is increased, and instant refrigeration is achieved; the instant refrigeration area is arranged in the interchangeable temperature chamber, the temperature is higher than the temperature in a refrigeration chamber, heat preservation can be achieved for the interior of food through crystallizing layers on surfaces of the food, and it is ensured that the food can not be completely frozen even after being placed in the instant refrigeration area for a long time.

A thermal tubular panel style solar energy collector consists of upper circulating pipes, lower circulating pipes, and heat collecting pipes, which are equipped with heat-exchanging ribs, connected with them. One at least exchanging pipe is installed in the upper circulating pipes and with both ends extending out. The chamber sealed by the said pipes is filled with liquid media, which is converted between gas and liquid phases to transfer heat energy. It works efficiently and weatherproof in cold winter and with no scales inside.

The invention provides a refrigerator, which comprises a refrigerator body, a condensation water discharging pipe and a dew preventing pipe, wherein the refrigerator body is provided with a refrigerator shell, a refrigerator container, and a foaming layer positioned between the refrigerator shell and the refrigerator container; the refrigerator container is internally provided with a refrigerating compartment; the condensation water discharging pipe is arranged in the refrigerator body, is further positioned behind the refrigerator container, and is used for discharging condensation water in the refrigerating compartment; and the dew preventing pipe is arranged in the refrigerator body and is further in contact with at least one part of the condensation water discharging pipe. Therefore, by using the refrigerator provided by the embodiment of the invention, through the contact of the dew preventing pipe with at least one part of the condensation water discharging pipe, that the condensation water in the condensation water discharging pipe cannot freeze to cause the blockage of the condensation water discharging pipe with the heat generated by the dew preventing pipe per se is guaranteed. In addition, the refrigerator provided by the embodiment of the invention is not necessary to be provided with a heating element additionally, the problem that the condensation water discharging pipe freezes to result in the blockage can be solved, and therefore, the structure is simple and the manufacturing cost is further low.

This invention relates to a closed cooling tower with spray-water automatic heating device including an assistant part and a main cooling part, in which the assistant part includes a soft water box, a supplement device and an electric control box set on the box, the main cooling system includes a shell, multiple fans set at the top in the shell, a water collector just under the fans, a spray branch system under the collector, a water tank set at the bottom of the shell and providing spray water to the spray branch system, a cooling coil pipe set under the branch system, an air inlet window set on the shell, in which the soft water box is connected with the coil pipe, a pump is set between the branch system and the water collecting tank with an automatic heating device, when the temperature in the tank is below 0deg.C, the device will be started up automatically and the pump will be closed, thus, water in the tank will not be frozen even if in winter and the main cooling system can work normally.

An expendable food box with self-heating function is composed of an external box, an internal two-layer box with a bulkhead to divide its inner space into upper space for food and lower space, and the antifreezing bag and heating calcium oxide bag, which are put in said lower space of internal box.

The invention discloses a construction method of a cold region tunnel electric heat tracing active insulation antifreezing facility, which comprises the steps of: firstly, arranging a heating cable in a secondary lining surface of a tunnel; secondly, connecting the heating cable with a temperature controller, arranging a temperature control probe connected to the temperature controller beside theheating cable; thirdly, arranging an insulation board on the heating cable; and fourthly, arranging a fireproof board on the surface of the insulation board, wherein the insulation board and the fireproof board are fixed by using steel flat and bolts. The method has a simple construction process, and materials used in the method have lower cost. The invention also discloses the cold region tunnelelectric heat tracing active insulation antifreezing facility constructed by adopting the method is environmentally-friendly, energy-saving, and convenient for construction and maintenance, and has an intelligent active insulation characteristic.

The invention relates to a water source heat pump air conditioner, which includes an enclosed compressor and its circulation pipeline, a four-way change valve, a refrigerant-water heat exchanger, a refrigerant-air heat exchanger, a fan and a casing. The refrigerant-water heat exchanger being as a soldered plate-type heat exchanger is mounted horizontally in the casing, whose one side external baffle has an inlet and an outlet of the refrigerant disposed diagonally and whose other side external baffle has an inlet and an outlet of circulating water disposed diagonally, so that its passage structure meet the flowability of freon and oil.

The invention discloses a plugging agent, a preparing method thereof and an oil well casing leakage stopping and channeling blocking method, and relates to the field of oil field construction. The problem that an oil well casing is poor in casing leakage stopping and channeling blocking effect is effectively solved. Raw materials of the plugging agent include a drying agent and water by the mass ratio of (0.8-1.6):(0.8-1.2), wherein the drying agent is prepared from, by mass, 30-50% of ultrafine micropowder, 30-50% of structure formation agent, 4-16% of curing agent, 2-8%of filler and 2-8% of modifier. The plugging agent has the advantages of being high in residing performance, interface bonding strength and channeling resisting strength, small in usage amount and short in construction period in oil well casing leakage stopping and channeling blocking construction.

A vacuum heat collector of solar energy uses the oscillating flow tube as the heat collecting tube. It includes: the out oscillating flow tube, the inner oscillating flow tube, the thermal insulating block cover and the glass vacuum tube. The oscillating heat flow tube is distributed for 2-3 layers on the circle of the glass vacuum tube which is made up of the inner glass tube, the out glass tube, the spring shelf and the getter; one end of the glass vacuum tube is open and one end of the inner and out tube mouth is fused, the other end is the half ball head. The inner glass tube is supported by the spring shelf which is set with the getter to absorb the gas when the glass vacuum tube works to keep the vacuum. The open end of the glass vacuum tube is set with the thermal insulating block cover to decrease the heat loss. So the invention has the big heat absorbing area and high heat collecting efficiency.

The invention relates to a diesel oil storage device with a blending function. The diesel oil storage device consists of a diesel oil storage tank No. 0, a diesel oil storage tank No.-35 and a blending pump room, wherein, the diesel oil storage tank No. 0 is built under a surface frozen soil layer; the diesel oil storage tank No.-35 is a vertical cylindrical tank and is built on the ground; and the blending pump room is built above a heat tracing outlet end of the diesel oil storage tank No. 0 and is equipped with an additive storage tank, an additive thinning tank, a static mixer, an on-lineanalysis meter and a computer control system. The diesel oil storage device has the advantages that investment on oil depot equipment is reduced; according to weather and market changes, diesel oil No.0, diesel oil No.-35 and an additive can be rapidly blended into diesel oil No.-10 and No.-20; and in the case of possible changes of certain indexes of the diesel oil No.0 after long-term storage, the additive is simply added for blending so as to achieve the purposes of improving the indexes and further obtaining qualified diesel oil product.

The invention discloses an immersed liquid phase change cooling medium and application thereof in a cooling system of electronic equipment, wherein the cooling medium is a mixture formed by mixing one, two or three of perfluoro-4-methyl-2-pentene, a hexafluoropropylene tripolymer, perfluorohexanone, perfluoroheptane, perfluorooctane, perfluoro-2-methyl-2, 3-epoxy pentane, perfluorohexane and perfluoropentane. The immersed phase change cooling medium provided by the invention has the characteristics of high electrical insulation property, low viscosity, relatively low boiling point, high gasification latent heat, good compatibility and stability, incombustibility, combustion inhibition, low global warming potential (GWP), zero ozone depletion potential (ODP) and the like.

The invention relates to an exosome preserving fluid and an exosome preserving method, which belong to the technical field of biology. The exosome preserving fluid comprises bovine serum albumin, trehalose, glycerol, dimethyl sulfoxide and a phosphate buffer solution. The invention also provides the exosome preserving method comprises the following steps: heating the preserving fluid at 85-95 DEGC for 10-30 minutes to form a colloidal solution, and preserving the exosome in a colloidal solution. The exosome preserving fluid provided by the invention can maintain the integrity, biological activity and inclusion stability of exosomes for a long time.

The invention provides a water pump part, an outdoor unit and an outdoor unit control method. The water pump part comprises a water pump, wherein the water pump is provided with a water inlet; and a second heating element is arranged on the water inlet. According to the water pump part, the outdoor unit and the outdoor unit control method provided by the invention, through arranging a first heating element, a drainage pipe of the water pump part can be heated, so that condensate water in the drainage pipe is prevented from being condensed and frozen, and the drainage efficiency of a unit is ensured; in addition, through arranging a second heating element, the condensate water in the water pump part can be heated, so that the occurrence of the phenomenon that the inner part of the water pump part is frozen so as to cause the damage of the water pump part is prevented; and through arranging a third heating element, the condensate water on a chassis can be prevented from being frozen so as to smoothly flow to the water pump part, so that the unit can drain reliably under the circumstance that the environment temperature is too low (0 DEG C and below), and the reliability of the unit under the circumstance that the environment temperature is too low is further improved.

The invention relates to a motor for a tower-type pumping unit and a tower-type pumping unit thereof. The motor of the invention comprises an inner planet gear box and a motor combination set, a bearing, a gear stand, a gear stand, a gearwheel and pinions, a shaft, a bearing, an outer rotor motor, keys, an outer rotor motor stator, a motor outer rotor and a gear, wherein the gears carry out the transmission in a superposition way; the motor outer rotor is arranged outside the outer rotor motor; the gear is nested in the motor outer rotor; a plurality of pinions are arranged between the outer edge of the gear and the inner edge of the gearwheel to form an inner planet reducing mechanism; the pinions mesh with the gear and the gearwheel; the pinions are fixed with the shaft; when the outer rotor motor rotates, the pinions rotate around the central axis of the bearing together with the shaft; and heat generated by the operation of the outer rotor motor heats the inner planet gear box, so that the gear oil can not solidify. The invention has the advantage of little equipment maintenance and is especially suitable for oil extraction in cold areas.