31results about How to "Solve the problem of negative pressure" patented technology

The invention relates to a light fixture. An explosive-proof respiratory device is disposed on a lower housing of the light fixture. A dustproof water-absorbing layer and an explosive-proof layer are disposed in a housing of the explosive-proof respiratory device, and an air pipe is disposed in the explosive-proof layer. On the one hand the dustproof water-absorbing layer can effectively separatedust and absorb water, and on the other hand the explosive-proof respiratory device can realize ventilation through the air pipe and balance the internal and external air pressure of the illuminationlight fixture to prevent water from being sucked into an electrical cavity of the light fixture in the presence of water. Thus the light fixture with the explosive-proof respiratory device can effectively solve the problem that the water is sucked into the light fixture owing to the negative pressure generated therein.

The invention relates to a puncture outfit used in a parathyroid hormone or lymph gland operation. The puncture outfit comprises a shell, an injection device arranged in the shell, an eccentric pressing component and a pressing control structure. The eccentric pressing component is arranged between the injection device and the inner wall of the shell, and the eccentric pressure acts on the injection device so that the injection device can pop out of shell to conduct puncturing. The pressing control structure is arranged between the shell and the injection device and can prevent the injection device from popping out, and blocking to the injection device is released after the pressing control structure is pressed. The puncture outfit used in the parathyroid hormone or lymph gland operation is simple in structure, fast and accurate in punching, convenient to operate, low in cost, small in damage to the human body and short in result obtaining time.

The invention provides an underwater unmanned self-walking cutter suction device. The device comprises an excavation system, a conveying system and a walking system, wherein the excavation system comprises a frame, a cutter ladder and a transverse swing frame; the cutter ladder is installed on the frame through the transverse swing frame, the excavation end of the cutter ladder can move relative to the frame in a rotating track parallel to a first plane and / or a rotating track parallel to a second plane, and the first plane is perpendicular to the second plane; the conveying system is installed on the frame, one end of the conveying system is connected with the excavation system, and the other end of the conveying system extends to the outside of the frame; and the walking system is installed at the bottom of the frame and used for driving the excavation system to walk. By adopting the cross axle frame structure in which the transverse swing frame, the cutter ladder and a frame body are hinged, the left-right transverse swing and up-down pitching actions of the cutter ladder are realized, so that the cutter suction machine can realize flexible operation in an underwater complex area.

The invention provides an anti-negative-pressure folding straw. The anti-negative-pressure folding straw is characterized by adopting a thin-wall hollow-tube-shaped structure, wherein the section of the straw is provided with at least one lateral inwards-folded section; the section of the straw is of a circular thin-wall structure, and one section of one side is inwards-folded. The anti-negative-pressure folding straw provided by the invention is simple in structure and low in manufacturing cost; the straw can be flatly pressed and folded when not in use, and heaved by pinching when in use; when a plastic film or an aluminium foil to package a drink, a negative-pressure problem is solved by ventilation due to the existence of a notch.

The invention relates to a puncture device for parathyroid gland or lymph node surgery, which includes a casing; an injection device, arranged in the casing; a biasing member, arranged between the injection device and the inner wall of the casing, and its biasing force Acting on the injection device, causing the injection device to pop out of the casing for puncturing; the pressing control structure, arranged between the casing and the injection device, can prevent the injection device from ejecting, and release the injection device after pressing. With respect to the blocking of the injection device, the parathyroid or lymph node intraoperative puncture device of the present invention has the advantages of simple structure, fast and accurate puncture, convenient operation, low cost, little damage to the human body, and short time for obtaining results.

The invention discloses a high vertical type sand barrier device, namely an inclined inserting plate type sand blocking wall, which comprises upright posts and a plate type blocking body fixed among upright posts, wherein one ends of the upright posts are buried in ground and the other ends of the upright posts extend out of the ground; the plate type blocking body fixed among the upright posts is composed of separated inserting plates by lamination; and an air channel with an included angle of 30-60 degrees with the horizontal plane is reserved between each lamination layers of each inserting plate. The inserting plates used by the embodiment of the invention have the shape, of which the cross section is a diamond with narrow angle alpha of 30-60 degrees and the longitudinal section is a concave shape with an opening; under the arrangement conditions of the sand blocking wall, the diamond narrow angle alpha of each inserting plate points to wind direction; and under an assembling state, the concave inserting plates are inserted into fixing grooves of the upright posts so as to be fixed, and an air channel with an included angle with the horizontal plane is formed between the straight of the opening of one inserting plate and the top plane of another inserting plate contacting the inserting plate.

The invention relates to a pulping machine, in particular to a pulping machine provided with an air inlet groove and an air outlet groove and capable of being cleaned in machine halt. The pulping machine has the advantages of high working efficiency, low cost, and capability of saving energy. The pulping machine comprises a hopper, a cylinder cover, a cylinder body, a separation basket, a fixed grinding seat, a motor casing and a motor, wherein the cylinder cover is arranged at the top of the cylinder body; the hopper is arranged at the top of the cylinder cover; the motor is arranged at the bottom of the cylinder body; the separation basket with leak holes is arranged in the cylinder body; the fixed grinding seat is arranged below the hopper; the lower part of the fixed grinding seat is arranged in the cylinder body; an upper grinding wheel is fixed at the bottom of the fixed grinding seat, and corresponds to a lower grinding wheel; a motor shaft of the motor is fixedly connected with the separation basket and the lower grinding wheel through the motor casing; a pulp outlet is formed in the bottom of the cylinder body; a slag hole is formed in the cylinder cover. The pulping machine is characterized in that at least one air inlet groove and at least one air outlet groove are formed in the fixed grinding seat, a water pan is arranged below a through hole in the bottom of the cylinder body, a water leak hole is formed in the water pan, and the area of the water leak hole is larger than that of a gap formed by the motor casing and the bottom of the cylinder body.

Provided is a refrigerating and freezing device (10). The refrigerating and freezing device comprises a box body (20), a gas separator (30) and a suction pump (41). A storage space (200) is defined in the box body (20), a storage container (21) is provided in the storage space (200), and the storage container (21) is provided with a modified atmosphere fresh-keeping space (210). The gas separator (30) is provided with a modified atmosphere film (300), a first gas collection cavity (310) and a second gas collection cavity (320). The modified atmosphere film (300) is configured in such a way that more oxygen, relative to nitrogen, of the air in the first gas collection cavity (310) penetrates the modified atmosphere film (300) and enters the second gas collection cavity (320), the first gas collection cavity (310) is controlled to communicate with storage chambers so that the air in the storage chambers can enter the first gas collection cavity (310), the first gas collection cavity (310) is further controlled to communicate with the modified atmosphere fresh-keeping space (210) so that other gas, except the gas which has entered the second gas collection cavity (320) by penetrating the modified atmosphere film (300), of the air which has entered the first gas collection cavity (310) can enter the modified atmosphere fresh-keeping space (210). The suction pump (41) communicates with the second gas collection cavity (320) through a pipeline, so as to facilitate pumping and discharging the gas which has penetrated into the second gas collection cavity (320), out of the gas separator (30).

The invention relates to a light fixture. An explosive-proof respiratory device is disposed on a lower housing of the light fixture. A dustproof water-absorbing layer and an explosive-proof layer are disposed in a housing of the explosive-proof respiratory device, and an air pipe is disposed in the explosive-proof layer. On the one hand the dustproof water-absorbing layer can effectively separate dust and absorb water, and on the other hand the explosive-proof respiratory device can realize ventilation through the air pipe and balance the internal and external air pressure of the illumination light fixture to prevent water from being sucked into an electrical cavity of the light fixture in the presence of water. Thus the light fixture with the explosive-proof respiratory device can effectively solve the problem that the water is sucked into the light fixture owing to the negative pressure generated therein.

The invention provides an air conditioner comprising an indoor set and an outdoor set. The indoor set at least comprises an indoor heat exchanger, and the outdoor set at least comprises a compressor, an outdoor heat exchanger, a throttling device, an outdoor fan used for the outdoor heat exchanger, and a low pressure detection device at the inhalation side of the compressor, wherein a control device controlling at least the compressor and the outdoor fan is disposed in the outdoor set, stops the compressor when low pressure abnormality is detected by the low pressure detection device during the operation process of the air conditioner, and controls start of the outdoor fan at the same time according to times of low pressure generation of the compressor. The inventive air conditioner facilitates protection of the compressor, elongates life of the compressor and assures normal operation of the air conditioner.

The invention relates to the technical field of water pumps, in particular to a novel energy-saving self-sucking pump which is characterized by comprising a pump body 1, an impeller 2, an impeller nut 3, a key 4, a shaft 5, a mechanical seal 6, a volute chamber cover 7, a pump cover 8, an outlet flange 9, an air discharging valve 10, a water blocking ring 11, a motor 12, a water discharging valve 13 and a water inlet 14. Because water is sucked from the single side of the impeller 2 of a traditional self-sucking pump, and the generated axial centrifugal tension is larger and is markedly larger if the traditional self-sucking pump is in the model with larger caliber, larger flow and higher lift, the pump shaft of the motor 12 is rapidly damaged, and the service life is shorter. Because the self-sucking pump belongs to a single-sucking structure, the pump is always in a pressurized state in the operation of the water pump, and the high the lift is, the higher the pressure is, the water is quite easily leaked to cause the water seepage and the damage of the motor. Differing from the design that the inlet of a traditional pump is positioned on the lateral surface, the water inlet 14 of the novel energy-saving self-sucking pump is drilled on the front surface of the pump, thereby the problems of water leakage and negative pressure are well solved, the work efficiency is improved, and the service life is prolonged. The novel energy-saving self-sucking pump can run at a low water level and has low water-sucking water level, high lift and high efficiency and saves energy; a front-surface water-sucking structure is adopted, the motor 12 has no axial tension, the radial force is lightened and balanced, the pump efficiency is improved, and the problems of water leakage and negative pressure are well solved; the service life of the pump is greatly prolonged; and the pump has more reasonable and compact structure and attractive appearance, and safer and more reliable in running.

The invention discloses an automatic resistance measuring device for a strain gauge and an operation method. The automatic resistance measuring device comprises a rack, a rotary disc, material discs, a Y-axis movement unit, a Z-axis movement unit and a resistance measuring head, wherein the rotary disc is arranged on the rack, and a plurality of material discs are arranged on the rotary disc; and the Y-axis movement unit is arranged on the machine frame, the Z-axis movement unit is arranged on the Y-axis movement unit, the resistance measuring head is arranged on the Z-axis movement unit, and after the rotary disc rotates, the material discs are located below the resistance measuring head. The stability of the resistance measuring process is controlled by controlling the pressing depth of the probe, the rotating angle of the rotating disc, the negative pressure adsorption force and other parameters, the automatic resistance measuring function is achieved, and the automatic resistance measuring device has great advantages in the aspect of achieving batch and automatic operation. Meanwhile, a high-precision calibration plate greatly improves the measurement accuracy.

The invention discloses a wind-proofing sand-blocking device for preventing sand from affecting or damaging railways and other facilities. The wind-proofing sand-blocking device comprises a vertical column buried on the ground and a wind-blocking ball provided with through holes, wherein an anti-corrosion steel wire mesh is fixed on the vertical column, and the wind-blocking wall is fixed on the iron wire mesh. The wind-blocking wall comprises a plurality of wind-blocking monomers which are combined together; each wind-blocking monomer is a rectangular double-sided sandwich structure consisting of a windward side and leeward side, wherein the thickness of a hollow sandwich layer is 5 to 15cm; the windward side and leeward side of the wind-blocking monomer are respectively and symmetrically provided with at least one through hole; and holes on the windward side of the monomer and holes on the leeward side thereof are not on the same axis, the ration of the diameter of the holes of the windward side to that of the holes of the leeward side is 8:1 to 1:1, and the windward side and the leeward side are separated by a strut.

The invention discloses a ventilation hole and an arrangement method after diversion tunnels are rebuilt into arc gates and controlled, which includes setting a water inlet tower (1) upstream of the diversion tunnel (2) to be transformed, and Ventilation holes (1.1) are pre-set in the water inlet tower (1), and an inlet gradient section (3) is arranged between the water inlet tower (1) and the diversion tunnel (2) to be transformed. The ecological water discharge tunnel section (2.2) is divided into M and N two sections successively, and the M section is a concrete reconstruction body A (4) made by concrete pouring for the described ecological drainage tunnel section (2.2), and the concrete reconstruction body A(4) The bottom of A(4) is reserved to form a drainage channel (2.2.1); it overcomes the disadvantage that the lower gate will take away the air when the full flow is discharged, resulting in the formation of a negative pressure area behind the gate, which will damage the gate and other discharge facilities. , has the advantage of eliminating the adverse effect of negative pressure on the safety of arc doors and discharge facilities.

The invention relates to a heat energy circulating system of a coating production line, which comprises a heating water tank of a pre-treatment system of the coating production line and a drying box of a drying facility of the coating production line, wherein a stainless steel inner container and a combustor are fixed in a furnace body; the combustor is fixed to the lower part of the stainless steel inner container; an air outlet of a circulating calorifier is communicated with the furnace body; an atmosphere communicating vent opening into atmosphere directly is arranged at the top of the furnace body; a water outlet pipe and a return pipe are arranged on the stainless steel inner container; a hot-water circulating pump is arranged on the water outlet pipe; the water outlet pipe is communicated with hot-water inlets of the heating water tank of the pre-treatment system of the coating production line and the drying box of the drying facility of the coating production line; and hot-water outlets of the heating water tank of the pre-treatment system of the coating production line and the drying box of the drying facility of the coating production line are communicated with the return pipe. The heat energy circulating system has the advantages of completely eradicating the phenomenon of the negative pressure of a loop and a water outlet pipe and solving the problems of the cavitation of the water circulating pump and the water attack of the system along with good anti-explosion performance and convenient overhauling.

The invention discloses an electric push rod used for solar photo-thermal power generation, and belongs to the linear driving technical field. A motor is arranged in the electric push rod; the motor is in transmission connection with a transmission threaded rod; the rotation of the transmission threaded rod drives a nut to axially move relative to the transmission threaded rod; the electric push rod is characterized in that the motor is connected with a cable; the cable extends out of the electric push rod; the cable comprises a sheath; and a ventilation channel for connecting the interior and the exterior of the electric push rod is formed in the sheath. The electric push rod has the advantages of ensuring the waterproof and dustproof effects of the electric push rod while solving the problem of easily generated negative pressure in the electric push rod.