67results about How to "Play the role of pressure relief" patented technology

The invention belongs to the field of building and relates to a wall surface and shed surface coating, screeding and polishing device, in particular to a module assembly-type wall surface and shed surface coating, screeding and polishing device. The module assembly-type wall surface and shed surface coating, screeding and polishing device aims to solve the problems that an existing wall wiping device cannot conduct coating, floating, polishing and dust collecting at the same time on a wall surface and a shed surface, operation is complex and inflexible, and the work intensity of operators is enhanced. A transversely-moving sliding rail unit is composed of two second rails arranged in parallel side by side and is installed on the upper face of a fixed sliding rail unit. A traveling lifting bracket mechanism is installed on the transversely-moving sliding rail unit. A splashing-type coating and screeding mechanism and a polishing and dust collecting mechanism are installed on the traveling lifting bracket mechanism in an alternate mode and can be connected with a material supplying and dust collecting mechanism in an alternate mode. The lower surface of a first rail of the fixed sliding rail unit is provided with a plurality of supporting uprights provided with adjusting supporting feet at the bottoms.

The invention belongs to the technical field of vehicles and discloses a closed type circular breathing system and an automobile. The closed type circular breathing system comprises an engine, an oil-gas separator, a supercharger and a one-way valve; one end of the oil-gas separator communicates with a crankcase of the engine; the other end of the oil-gas separator communicates with an air inlet pipeline through an air outlet pipeline; the air inlet pipeline communicates with the supercharger; the supercharger communicates with the engine; the inlet end of a bypass pipeline communicates with the air outlet pipeline; the outlet end of the bypass pipeline communicates with the supercharger and the engine correspondingly; and the one-way valve is arranged on the bypass pipeline, and is configured to be selectively opened, so that gas separated by the oil-gas separator can return to the engine through the bypass pipeline for pressure relief of the crankcase. The closed type circular breathing system is simple and reliable in structure, the risk of engine damage caused by sudden increase of engine pressure is reduced, effective protection of the engine is realized, and the service lifeof the engine is prolonged.

The invention discloses a gas expansion device and a necking processing method and application of an expansion tube. The expansion device includes an expansion tube and an inflatable ignition head. The method is to fix the expansion tube through the clamp first, then rotate the expansion tube and heat the end of the expansion tube through the clamp, heat the end of the expansion tube until it is close to or reach plastic deformation, and after the front part of the shrinking mold touches the end of the expansion tube, The end of the expansion pipe moves from the front to the rear of the shrinking die, and the shrinking die extrudes and thickens the end of the expansion pipe, and the end of the shrinking end is thickened axially outward, and then the end of the expansion pipe is processed with a through-hole knife. Through-hole fixed aperture. The expansion tube is made into a pressure vessel by shrinking. The utility model has the advantages of simple structure, easy processing of structural components, low manufacturing cost, no flying head, no air leakage, safe transportation, no hidden danger of squib, and large expansion force.

The invention provides a fixed metal-enclosed switch cabinet, relating to the field of power distribution equipment. The fixed metal-enclosed switch cabinet comprises a casing, a switch device is fixedly mounted on the bottom of an inner wall of the casing, an insulating plate is fixedly mounted on two sides of the switch device, heat dissipation holes penetrating through the casing are formed ontwo sides of the casing and on the lower side of the casing, two moisture-proof pipes are fixedly mounted on a back side of the inner wall of the casing and on an upper side of the switch cabinet, anda clamp ring is annularly arranged at the interior of the moisture-proof pipe . According to the fixed metal-enclosed switch cabinet, the pressure of the cabinet is released to the interior of a topcover through the ventilation pipeline by the combination of a pressure relief hole and a straight groove, then the pressure inside the top cover is released to the outside of the cabinet by the combination of a slide bar and an iron piece, it can function in pressure relief to avoid exploding caused by over large pressure inside the cabinet and brings great convenience to people.

According to the battery disclosed by the invention, the shoulder A and the shoulder B which are bent outwards are arranged in the middle of the base shell, so that when the battery is heated and gasin the battery expands, the gas can expand towards two ends of a cavity, a pressure relief effect can be achieved, and the phenomenon of telescopic expansion towards two electrodes can be avoided; meanwhile, the heat dissipation area of the shell can be increased, and the heat dissipation capacity is improved; the sealing performance of the battery can be improved by the sealing and flanging process, the strength of the first pole shell and the second pole shell can be improved, and the overall structural strength of the battery is improved; a first pole piece and a second pole piece are woundinto a whole, the upper end face of the first pole piece is electrically connected with a first pole shell, and the lower end face of the second pole piece is electrically connected with a second pole shell; by the adoption of the connecting mode, welding is not needed, the process can be simplified, cost is reduced, and automatic production can be better achieved. Meanwhile, the end surface contact design is adopted, rapid and stable charging and discharging can be achieved, and the cycle life of the battery is prolonged.

The invention relates to a reactor capable of self-balancing the pressures inside and outside a lining pipe, and applications thereof, wherein the reactor comprises a pressure bearing shell, an inertliner, a liner inlet sealing ring, a liner outlet sealing ring, a pressure balance valve and a self-protection pressure relief valve. According to the present invention, the pressure bearing shell bears the high pressure, the liner is made of the inert material so as not to participate in the reaction, sealing is formed between the inlet and the pressure bearing shell and between the outlet and the pressure bearing shell so as to protect the pressure bearing shell from being corroded by reactants and prevent the interference of the shell material on the reaction result, and the pressure balance valve and the self-protection pressure relief valve ensure the balance of the pressures inside and outside the liner during the pressure increasing and pressure decreasing process so as to avoid theliner breaking caused by pressure difference, and can provide the effect of the safety valve in the case of the too high pressure of the current end or the clogging of the outlet; and the reactor canbe used at the temperature of room temperature to 800 DEG C under the pressure of 0 pa to 1313 Mpa, and has advantages of simple production, low cost, convenient installation and use, reliable data,corrosion resistance, high safety and the like.

The invention discloses a water draining and pressure relieving structure capable of realizing anti-floating. The water draining and pressure relieving structure capable of realizing anti-floating comprises a well wall pipe and a slow expansion type hydro-expansive antipriming pipe. The slow expansion type hydro-expansive antipriming pipe is arranged outside the well wall pipe in a sleeving manner. A micro-expansionary fine aggregate concrete layer is arranged between the slow expansion type hydro-expansive antipriming pipe and the well wall pipe. The outer diameter of the slow expansion typehydro-expansive antipriming pipe corresponds to the inner diameter of a water draining hole in which the slow expansion type hydro-expansive antipriming pipe is located. The structure has the advantages that when water leaks out of the well wall pipe, both the slow expansion type hydro-expansive antipriming pipe and the micro-expansionary fine aggregate concrete layer expand, and at the moment, the gap between the slow expansion type hydro-expansive antipriming pipe and the inner side wall of the water draining hole decreases, so that the corrosion to a floor layer due to the outflow, from theexterior of a well wall to the floor layer, of the water under the floor layer can be effectively prevented, the strength of the floor layer is lowered and the function of anti-floating is realized;the water under the floor layer is drained out through the well wall pipe, so that the buoyancy which is applied to the floor layer by the water is reduced and the function of pressure relieving is realized.

The invention provides a combined sampling valve with simple structure and low cost, comprising a valve body, a pressure gauge and a valve rod, wherein the valve rod is provided with an inlet, an outlet and a sampling hole. The inlet and the outlet are communicated by a liquid passage arranged in the valve body, the sampling hole is communicated with the middle part of the liquid passage by a sampling passage arranged in the valve body, the valve rod is removably arranged on the valve body, one end of the valve rod extends to the sampling passage, wherein the valve rod is configured in a manner that the sampling passage is open and the liquid passage is ultimately closed when the valve rod shifts towards the liquid passage as well as that the liquid passage is open and the sampling passage is ultimately closed when the valve rod shifts far from the liquid passage, and the other end of the valve rod is arranged outside the valve rod and the pressure gauge is arranged on the outlet. The invention is used on a pressure fluid transportation pipeline.

An oil well pump of an underground linear motion actuator is designed for solving the technical problems that as the structure of the existing linear oil well pumps are unreasonable, thus causing a mover to be deadlocked, a stator to be scrapped, a magnet to be eroded and the service life to be short, and the like, and the oil well pump of the underground linear motion actuator comprises two large parts: an oil well pump and a linear motor, wherein, the single-level armatures of the linear motion actuator are connected with each other by threads with a spigot in a spoke-work way and are located to seal with the end surface by the spigot; a phase-change connection wire is adopted between each section of the windings; the air gap of the linear motor is sealed by a small clearance; the magnetic pole of the mover is a radical magnetic circuit pole; an air expander is arranged in an outer shell of the linear motor. The linear motion actuator is connected with the oil well pump by a screen pipe; a special pump is designed on the upper end of the pump barrel, which changes a traditional oil circuit; a plunger piston and a push rod use solid cores in a pump barrel. The oil well pump of the underground linear motion actuator has the characteristics and beneficial effects of reasonable structure, saving energy and no polluting the environment, which is suitable for the use of directional wells; the parameter can be adjusted at any time according to the changes of different well liquid.

The invention discloses a device and a method for grouting and reinforcing a secondary casing pipe for a coal seam floor. The device comprises a flange pipe connected with a gate valve and a grouting flange pipe, wherein the flange pipe connected with the gate valve is arranged at the upper part of the grouting flange pipe; the flange pipe connected with the gate valve comprises a flange plate, a hard pipe with threads fixedly connected to the upper end of the flange plate and a casing pipe with threads fixedly connected to the lower end of the flange plate; the grouting flange pipe comprises a flange plate, a casing pipe with threads fixedly connected to the lower end of the flange plate and a grouting hose connection pipe fixedly connected to one side of the casing pipe with threads; the flange plate of the flange pipe connected with the gate valve and the flange plate of the grouting flange pipe are connected with each other through bolts; the hard pipe with threads at the upper end of the flange pipe connected with the gate valve is connected to a choke plug gate valve. The method is characterized by grouting and reinforcing the secondary casing pipe by using the device; the device and the method can be used for effectively reinforcing a gap between an outer casing pipe layer and an inner casing pipe layer; the problems that grout and water are leaked when the grout is injected into the drilled surface and the casing pipe is released in the later period can be solved; the device is convenient to demount after being used and can be repeatedly used.

The invention discloses a high-pressure gas filling valve, which comprises an inflatable seat body, a through hole, a valve cavity, an inflatable nozzle, an inflatable valve, a retaining ring and a first sealing ring. There is a through hole under the mouth, a valve cavity under the through hole, a retaining ring under the valve cavity, an inflation valve and a first sealing ring inside the valve cavity; one end of the inflation valve is an inflation thimble, and the other end is an inflation valve core ; The first sealing ring is set on the inflation thimble, and the inflation hole runs through from the top of the inflation thimble to the bottom and communicates with the valve chamber. A gas cracker includes an expansion tube and a gas-filled ignition head. The filling valve of the present invention has simple structure, easy processing of structural components, low manufacturing cost, and no air leakage; the gas cracker has simple structure, easy processing of structural components, low manufacturing cost, no air leakage, safe transportation, and no squibs Hidden danger, large expansion force.

The invention provides a male underpants type concealable anti-reflux urine collection system, and relates to the technical field of medical instruments. The male underpants type concealable anti-reflux urine collection system comprises an underpants body, a through hole corresponding to the penis is formed in the underpants body, the penis can pass through the through hole, a urine collection part is fixed to the outer side of the underpants body, the inlet end of the urine collection part corresponds to the position of the through hole, a connecting part is arranged between the inlet end of the urine collection part and the pants body, the urine collection part is detachably connected with the pants body through the connecting part, an anti-reflux sleeve is connected to the interior of the urine collection part in a sealed mode, the anti-reflux sleeve is tightly attached to the penis, and urine is led out through the urine collection part; and the anti-reflux sleeve is arranged at the position of the through hole, in the whole urination process, urine cannot flow back, the urine collection time of the urine storage bag is effectively shortened, the urination feeling of a user is improved, and the nursing pressure of nursing staff is relieved. By adopting the anti-reflux urine collection system, the pants body, the anti-reflux component, the guide component and the urine storage bag can be replaced independently.

The invention provides a direct refrigeration air conditioner system and relates to the technical field of air conditioner systems. The direct refrigeration air conditioner system comprises a pressurevessel, a water storage container and an air compression device. The air compression device is connected with the pressure vessel through a first connecting pipeline, and a first valve body is arranged on the first connecting pipeline. The pressure vessel is connected with a room of a user through a second connecting pipeline, and a second valve body is arranged on the second connecting pipeline.The pressure vessel is arranged in the water storage container. When inflating, the first valve body is opened, the second valve body is closed, outside air is pressed into the pressure vessel through the air compression device, the air pressure increases to raise the temperature, and heat is transferred to water in the water storage container; and during deflation, the first valve body is closed, the second valve body is opened, air is exhausted from the pressure vessel, the temperature of the air is reduced due to pressure reduction, and low-temperature air is delivered to the room of the user. The method has the beneficial effects that refrigeration efficiency is high, and the cost is low.

The invention discloses a pump-free sampler which comprises a sampler main body, a uniform mixing box is arranged in the sampler main body, an electric control valve is arranged at the bottom end of the uniform mixing box and penetrates through the bottom end of the uniform mixing box, a bottom support is arranged at the bottom end in the sampler main body, and a plurality of water collecting bottles are vertically arranged on the surface of the bottom support; an overflow box is arranged on the side face of the interior of the sampler body, a metering cup is arranged in the overflow box, the metering cup and the electric control valve are located on the same vertical plane, an external control pump and a relay are arranged at the top end of the exterior of the sampler body, and the external control pump is electrically connected with the relay; and an external control pump is controlled by a relay to pump a water source from the outside to a metering cup in the overflow box, and then the water source is controlled by an electric control valve to flow into the mixing box.

The invention discloses a none-motile pressure relieving plate with a drainage function for a nuclear power unit. The pressure relieving plate comprises a frame, door planks, water releasing assemblies and fusible bolts; the door planks are provided with shearing bolt assemblies, the frame is provided with a bolt fixing seat, and shearing bolts in the shearing bolt assemblies are inserted into the bolt fixing seat; the water releasing assemblies are arranged on the inner side faces of the door planks, and each water releasing assembly comprises a blade shaft, a floating ball, a floating ball rod and a transmission gear set; and the two ends of the blade shafts are in transmission connection with the two sides of water releasing frames, the blade shafts are provided with blades, the planks are provided with water releasing channels corresponding to the blades, the floating balls are connected with the floating ball rods, the floating ball rods are furthermore in transmission connection with the blade shafts through transmission gear sets, the floating balls move up and down to drive the floating ball rods to poke the transmission gear sets to rotate the blade shafts, the blade shafts are rotated to make the blades open or close the water releasing channels on the door planks, and the water releasing frames are provided with the fusible bolts. The pressure relieving plate has the pressure relieving function and also has the water releasing and fire prevention functions.

The invention discloses a backflow type anti-overflow boiler, which comprises a boiler body and a boiler cover, wherein a jacket is arranged outside the boiler body, and forms a hollow cavity together with the boiler body; a plurality of backflow holes which make the inside of the boiler body and an oral cavity communicated are formed on the boiler body at the bottom of the hollow cavity; the upper part of the jacket is higher than the port of the boiler body and is provided with an overflow platform; and the boiler cover is matched with the overflow platform. The backflow type anti-overflow boiler has the advantages that: overflowing materials overflow from the port of the boiler body and can return to the boiler body from the backflow holes; meanwhile, the jacket is provided with the overflow platform to prevent the overflowing material overflowing from the upper end of the jacket, and exhaust holes formed on the boiler cover also conduct a decompressing function.

The invention discloses an anti-flying head supercritical oxygen gas cracker, which comprises an expansion tube and an inflatable ignition head. One end of the expansion tube is shrunk and sealed, and the other end is shrunk with an inflatable igniter; Fix the expansion tube, then rotate the expansion tube and heat the end of the expansion tube through the clamp, heat the end of the expansion tube to near or reach the plastic deformation, and after the front part of the shrinking mold touches the end of the expansion tube, the end of the expansion tube is from The shrinking mold moves from the front to the tail, and the shrinking mold extrudes and thickens the end of the expansion tube, and then uses a through-hole knife to make a through hole at the end of the expansion tube to fix the aperture; the other end is extruded and thickened, Through-hole fixed hole diameter, or sealing and thickening molding. The expansion tube is made into a pressure vessel by shrinking. The utility model has the advantages of simple structure, easy processing of structural components, low manufacturing cost, no flying head, no air leakage, safe transportation, no hidden danger of squib, and large expansion force.

The invention discloses a built-in bypass valve body applicable for control of water channels in a wall hanging stove system. The built-in bypass valve body comprises a shell and a bypass mechanism; the shell is provided with a water inlet channel, a first water outlet channel, a second water outlet channel and a bypass mechanism storage cavity; and the first water outlet channel and the second water outlet channel communicate with the water inlet channel in a switching manner separately. According to the built-in bypass valve body disclosed by the invention, the technical problem that the built-in bypass valve body applicable for the control of the water channels in the wall hanging stove system is hard to manufacture is solved.

The invention provides a novel drinking water heat preservation water bottle which adopts advanced fluid mechanics structural design, adopts channel type water outlet controlled by a double-closed valve core structure and is provided with a vent hole for opening / closing in a linkage manner. The novel drinking water heat preservation water bottle is provided with a water inlet and a water outlet intwo directions of a bottle body, which do not interfere with each other, so that it is ensured that air leakage and temperature loss do not occur in the bottle during standing, and the heat preservation time is prolonged. A side water outlet structure of the water bottle completely eradicates the danger of surging, ensures no water leakage when the water bottle is not in use, and ensures smooth water outlet when the water bottle is in use; a flying-wing-shaped ergonomic key is operated in a one-key mode; temperature / pressure gauges are arranged for displaying the temperature and the air pressure in the bottle; a water quality detection pen is arranged to provide data for drinking water health; lighting light is also provided in dark; the vent hole with the pressure relief function can provide a pressure relief guarantee for overpressure in the bottle for a user when the user loads gas-containing beverage; therefore the water bottle can bring brand-new experience with strong heat preservation capacity, safety and sanitation and an advanced structure to the user.

The invention discloses a gas expansion device and a necking processing method and application of an expansion tube. The expansion device includes an expansion tube and an inflatable ignition head. The method is to fix the expansion tube through the clamp first, then rotate the expansion tube and heat the end of the expansion tube through the clamp, heat the end of the expansion tube until it is close to or reach plastic deformation, and after the front part of the shrinking mold touches the end of the expansion tube, The end of the expansion pipe moves from the front to the rear of the shrinking die, and the shrinking die extrudes and thickens the end of the expansion pipe, and the end of the shrinking end is thickened axially outward, and then the end of the expansion pipe is processed with a through-hole knife. Through-hole fixed aperture. The expansion tube is made into a pressure vessel by shrinking. The utility model has the advantages of simple structure, easy processing of structural components, low manufacturing cost, no flying head, no air leakage, safe transportation, no hidden danger of squib, and large expansion force.

The invention provides a multi-chamber magnesium-aluminum alloy parking air reservoir. The multi-chamber magnesium-aluminum alloy parking air reservoir comprises a rotating motor; the rotating motor is obliquely arranged; an output end of the rotating motor is equipped with a bottom plate; an inner positioning seat and an outer positioning tube are installed at the center of the surface of the bottom plate; the inner top of a reservoir body is equipped with a setting mechanism; the setting mechanism is slidably attached to the top surface of a partition cover; the setting mechanism is used forcompressing the partition cover at the top; the setting mechanism is assembled at the center of the inner wall of a transparent seal cover; and the top surface of the transparent seal cover is fixedly connected with a pneumatic rod. According to the multi-chamber magnesium-aluminum alloy parking air reservoir provided by the invention, the placement stability of the reservoir body can be ensuredthrough the inner positioning seat and the outer positioning tube, the offset of the reservoir body during welding is avoided, and the welding precision is improved; and the inner positioning seat canstop and limit the partition cover, so that the installation of the partition cover is simpler and more convenient, and the installation position is more accurate.

The invention provides a multi-layer oil-gas separating device for an automobile engine. The purposes being high in separating efficiency, good in filtering effect and multiple in separating layers are achieved. The multi-layer oil-gas separating device for the automobile engine comprises a cover body, and the cover body comprises a chassis and an upper cover (2) which are detachably connected. The multi-layer oil-gas separating device for the automobile engine is characterized in that the chassis (1) is provided with a first air inlet (3), a first channel (4) is arranged on the portion, corresponding to the first air inlet, of the upper cover (2), and a second channel (5) is arranged on the side face of the first channel (4); the chassis (1) is provided with a first partition plate (9), the cover body is provided with a lower channel (6) and an upper channel (7), the lower channel (6) is located under the first partition plate (9), and the upper channel (7) is located over the first partition plate; and a first column ring (8) is fixedly arranged on the chassis (1).

A transformer with explosion-proof function, comprising a transformer housing, a pressure relief hole is penetrated through the transformer housing, a pressure relief piston is slidably connected in the pressure relief hole, the upper end of the pressure relief piston and the connecting rod The lower end is fixedly connected, the side of the upper end of the connecting rod is hingedly connected with one end of the connecting rod, the upper end of the transformer housing is fixedly provided with a cylinder, and a buffer slide bar is slid inside the cylinder, and the buffer slide bar and Buffer springs are connected between the cylinders. In the present invention, when the temperature inside the transformer casing increases and the air pressure increases, the pressure relief piston slides to the upper end of the pressure relief hole, so that the high-pressure gas inside the transformer casing flows from the side of the pressure relief piston. The opening is discharged to relieve pressure. When the pressure relief piston slides upward, it drives the connecting rod to push the buffer slide bar. When the buffer slide bar slides, it squeezes the buffer spring, which can effectively reduce the impact force during pressure release.

This application relates to the field of urban drainage, in particular to a two-way water stop valve, which is characterized in that it includes a gate frame, a gate is slidably connected to the gate frame, a screw lift is provided on the gate frame, and the wire The end of the screw rod of the rod lifter is connected with the gate. Both sides of the gate are connected with water-stop rubber strips. pressure relief structure. The application has the advantage of improving the water-stopping effect of the water-stop valve.

The invention discloses a pressure-controllable herringbone corrugated plate shell type heat exchanger stress strain test system. The system comprises an industrial control computer, a data acquisition system, a control system and a water supply system, wherein the water supply system comprises a plunger pump driven by a motor, a first water rank, a filter, an adjusting valve and a second pressure gauge, a pipeline between the second pressure gauge and a first solenoid valve is connected in a by-pass mode with a pressure release path sequentially connected with a second solenoid valve and a second water tank, the data acquisition system comprises a data acquisition module connected with the industrial control computer, and a strain gauge and a pressure sensor connected with the data acquisition module, and a strain gauge, and the control system comprises a control module connected with the industrial control computer, and a frequency converter, the first solenoid valve and the second solenoid valve in circuit connection with the control module. The system is advantaged in that the structure is simple, the system is convenient to use, the system can be widely applied to measurement on stress, strain and pressure under high voltage or super high voltage states, and the automatic system can guarantee safety of an operator.

The invention discloses a supercritical oxygen fracturing device which comprises an expansion pipe and a gas-inflated ignition head. A necking port in one end of the expansion pipe is sealed, and a necking port in the other end of the expansion pipe is provided with the gas-inflated ignition head. A necking port machining method comprises the steps that the expansion pipe is fixed through a clamp, the clamp is used for rotating the expansion pipe and heating one end of the expansion pipe, the end of the expansion pipe is heated till being approximate to or reaching plastic deformation, the front portion of a necking mold makes contact with the end of the expansion pipe, the end of the expansion pipe moves from the front portion to the tail of the necking mold, the necking mold carries out extrusion thickening molding on the end of the expansion pipe, a through hole knife is used for forming a through hole in the end of the expansion pipe and fixing the hole diameter, the steps are repeated to carry out extrusion thickening molding on the other end of the expansion pipe, a through hole is formed, and the hole diameter is fixed, or sealing thickening molding is carried out. A pressure container is prepared from the expansion pipe through the necking port machining method. The supercritical oxygen fracturing device has the advantages that the structure is simple, the structural components are easy to machine, the manufacturing cost is low, head flying and gas leakage are avoided, conveying is safe, no dud hidden danger exists, and expansion force is large.

The invention relates to the technical field of generator cleaning, in particular to a generator rotor coil water loop pickling device. Due to the structural factor of a generator rotor coil water loop, every time when the water loop is blocked, and is hard to dredge, the water loop needs to return to a factory, a coil is replaced for overhauling, the construction period is long, and the cost is high. One end of a second communication pipe communicates with a second stop valve and a third stop valve, one end of a first communication pipe is communicated with a first stop valve and a fourth stop valve, an air pipe joint is arranged on the second communication pipe, and pickling descaling efficiency is effectively improved. One end of a demineralized water pipe communicates with the upper end of a solution box, one end of a steam pipe communicates with the upper end of the solution box, pickling effect is effectively improved, one end of a bypass pipe communicates with a water turning pipe, the other end of the bypass pipe communicates with a pressure meter and a flow meter, a bypass adjusting valve is arranged on the bypass pipe, pickling pressure stability is effectively ensured, and the device is mainly used for generator rotor coil water loop pickling.

The invention provides an engine oil and gas separation device, which achieves the purposes of high separation efficiency, good filtering effect and more separating layers. The engine oil and gas separation device comprises a cover body, wherein the cover body comprises an underframe and an upper cover (2) which are detachably connected. The engine oil and gas separation device is characterized inthat the underframe (1) is provided with a first air inlet (3), the upper cover (2) is provided with a first passage (4) corresponding to the first air inlet in position, the side face of the first passage (4) is provided with a second passage (5), the underframe (1) is provided with a first partition plate (9), the cover body is provided with a lower passage (6) and an upper passage (7), the lower passage (6) is positioned below the first partition plate (9), the upper passage (7) is positioned above the first partition plate, and the underframe (1) is fixedly provided with a first column ring (8).

The invention discloses a sealing device of a vertical pump. The sealing device of the vertical pump comprises a pump shaft, a sealing box body is arranged on the pump shaft in a matched mode, a mechanical seal is arranged at the upper end of the sealing box body, and the lower part of the sealing box body is matched with a protruding section of the pump. The sealing device is characterized in that a sliding bearing is arranged in the sealing box body; the sliding bearing is arranged on the pump shaft in a sleeving mode; the sliding bearing and the sealed box body are connected and fixed by afastening screw; two horizontal exhaust pipes are symmetrically arranged on the sealing box body; and the tail ends of the horizontal exhaust pipes are connected with a suction pool; an oil storage device is arranged at the upper end of the mechanical seal; an oil discharging pipe is arranged on the other side, corresponding to the oil storage device, of the mechanical seal; and a vertical exhaustpipe is arranged on the oil discharging pipe. The device has the advantages of being compact in structure, good in stability, safe and reliable, good in using effect, long in service life and free offrequent replacement and maintenance, and the working efficiency of the vertical pump is improved.

The invention discloses a downhole air door opening device and a pneumatic control interlocking system thereof, belonging to the technical field of downhole air door control. The downhole air door opening device of the invention comprises an air door, a small door is opened on the air door, a limit frame is fixed on the door frame of the small door, and a wire rope on the small door is connected to the air cylinder through the limit frame, the well wall and the pulley system of the air cylinder, The pneumatic control interlocking system includes a gas path and b gas path. The a gas path and b gas path have the same structure. It consists of valve, two-position three-way single air control valve and pneumatic button. The invention realizes the automatic switching of the downhole air door for passing vehicles and people, can effectively avoid the phenomenon of "air door hitting people" of the impact air door, and eliminates the potential safety hazard in this respect.