3443 results about "Globe valve" patented technology

The invention relates to the field of sealing detection, in particular to a high-pressure stop valve body sealing performance detection device which comprises a detection box body used for placing a valve body for observation and comprising a water tank, the water tank is arranged to be a U-shaped groove with an upward opening, and the bottom of the side of the water tank is fixedly connected with a mounting plate. An outer electric push rod is mounted at the top of the mounting plate; and the supporting assembly is arranged in the water tank, is used for bearing the valve body and comprises a cross beam, and limiting sliding rails are arranged on the two sides of the cross beam. Through cooperation of the first plugging assembly, the second plugging assembly and the supporting assembly, external bubble interference can be effectively avoided, two-way pressure detection is supported, and the detection accuracy and automation level are improved, so that the problems that in the prior art, in the detection process, non-leakage bubbles are generated, judgment of detection personnel is interfered, and the detection efficiency is improved are solved. And false detection or missing detection is caused. And due to limitation of one-way detection, the sealing performance of the valve body in a two-way pressure-bearing state is difficult to comprehensively evaluate.

The invention provides a pipeline double-seal stop valve structure, which belongs to the technical field of stop valves, and comprises a valve body and a screw rod arranged on the valve body, and the upper end of the valve body is provided with a sealing port. Compared with conventional single-side sealing, the two valve clacks are arranged at the upper end and the lower end of the sealing opening, the sealing performance of the valve can be remarkably improved through double-side double sealing, it is ensured that media do not leak, and when the valve is in a closed state, sealing of the upper valve clack and the lower valve clack can more effectively prevent the media from leaking; the other valve clack can provide additional sealing protection, meanwhile, under the high-pressure environment, the sealing structures of the upper valve clack and the lower valve clack can provide higher mechanical strength, the overall sealing effect of the valve is improved, meanwhile, connection between a cavity between the upper valve clack and the lower valve clack and the outside is effectively blocked through the arrangement of the sealing air bag, and therefore the sealing effect of the valve is improved. Pseudo connection between the upper valve clack and the lower valve clack is achieved, the sealing area is increased, the pressure borne by the valve clacks is reduced, and then the sealing effect is improved.

The utility model relates to the technical field of marine scientific investigation equipment, in particular to a winch emergency lowering and pressure compensation system which comprises a reversing valve, a winch assembly, a brake assembly and an emergency function assembly. The brake part is controlled by a brake assembly to brake the power motor, and two cavities of the power motor are communicated with the reversing valve to form a working loop. The emergency function assembly comprises an energy accumulator, a first stop valve, a hydraulic control valve and a speed regulating valve, the first stop valve, the hydraulic control valve and the speed regulating valve are sequentially communicated, the first stop valve and the speed regulating valve are correspondingly communicated with two cavities of the power motor to form an emergency lowering loop, and the energy accumulator is communicated with one cavity of the power motor through an energy storage oil way. The energy accumulator is further communicated with the two cavities of the power motor through a compensation oil way, the working loop and the compensation oil way are each provided with a control oil way for providing a control oil source for the brake assembly, and a second stop valve is arranged on the control oil way of the compensation oil way.

The invention discloses a stop valve, and relates to the field of valves. A stop valve comprises a valve seat, a valve cover, a support, a lead screw and a sealing valve column, the liquid inlet end and the liquid outlet end of the valve seat are fixedly connected with liquid conveying pipelines on the two sides through flange plates and bolts respectively, the valve cover is fixedly installed on the valve seat through bolts, the support is fixedly installed on the valve cover, the sealing valve column is arranged in the valve seat, and the lead screw is fixedly installed on the support. The lead screw is fixedly connected to the upper end of the sealing valve column, the upper end of the lead screw upwards penetrates through the valve cover, and the double-opening sleeve is rotationally connected to the support; the operation difficulty of resisting fluid pressure when the valve is opened manually is effectively reduced, the downward pressure of fluid becomes assistance during closing, a worker only needs to reversely rotate the rotating wheel to achieve smooth downward movement of the sealing valve column, operation is convenient and fast, tighter sealing can be achieved through the fluid pressure, and the reliability after the valve is closed is improved.

The invention discloses a novel precise ammonia spraying control system for an SNCR (selective non-catalytic reduction) denitration system. The system comprises an original pipeline, a newly added pipeline, a partitioned solution mother pipe, a first connecting pipe, a main stop valve, a first stop valve and partitioned solution branch mother pipes, a partition solution mother pipe is connected to the newly added pipeline, a main stop valve, a first stop valve and a second stop valve are arranged in the partition solution mother pipe, and the main stop valve is connected with the first stop valve and the second stop valve in parallel; according to the device, a modular design is adopted, dual improvement of denitration accuracy and stability is achieved through monitoring system reconstruction and control logic optimization, on one hand, a closed-loop control system with partition real-time monitoring, trend pre-judgment and hierarchical quantity control is constructed, flue gas analyzers and sampling point probes are arranged at inlets of the three types of cyclone separators respectively, and on the other hand, the flue gas analyzers and the sampling point probes are arranged on the other sides of the three types of cyclone separators respectively; the NOx concentration of the original flue gas of each partition is collected in real time and synchronously passes through a data collection chip arranged in the partition NOx storage early warning device.

The invention provides a refueling station filling function detection device and method. The device comprises an operation control module, a vehicle-mounted hydrogen storage simulation module, a hydrogen diffusion module, a hydrogen supply module, a nitrogen purging module, a hydrogen replacement module, a weighing metering module and a skid-mounted carrying module. The operation control module comprises a control unit and an operation panel, different control signals are generated according to the requirements of workers, and the vehicle-mounted hydrogen storage simulation module is used for simulating vehicle-mounted hydrogen storage systems of different vehicle types and is connected with a hydrogen filling port of the hydrogen supply module through a main filling pipeline; the nitrogen purging module and the hydrogen replacement module are connected with the main pipeline through a pressure regulating valve and a one-way valve; the hydrogen diffusing module is connected with the main pipeline through a stop valve, and hydrogen in the pipeline of the device is vented through a flame arrester. By adopting the device, the problems of complicated operation and easy damage to equipment in a station in the existing detection technology are solved, the pressure and temperature of related media are detected in real time by adopting an automatic detection technology, and the filling function and metering of the hydrogen filling machine are monitored.

The embodiment of the invention provides stop valve machining drilling equipment and a method thereof, and relates to the technical field of stop valve machining. Stop valve machining and drilling equipment comprises a drilling table and a material storage box on the side of the drilling table, movable drilling mechanisms are installed on the two sides of the upper end of the drilling table, a valve body positioning mechanism is installed on the portion, between the two movable drilling mechanisms, of the drilling table, and an auxiliary positioning assembly is installed on the other side of the drilling table. The auxiliary positioning assembly is matched with the valve body positioning mechanism and used for clamping and auxiliary fixing of the valve body, so that the two movable drilling mechanisms can synchronously conduct drilling operation on machining parts at the two ends of the valve body. The movable drilling mechanism has the adjusting functions including height adjustment and horizontal displacement, and it is ensured that a drill bit can be accurately aligned with the position needing drilling. The gear motor drives the gear transmission system to drive the drill bits on the two sides to rotate synchronously, simultaneous drilling of the two ends of the stop valve is achieved, and the machining efficiency is greatly improved.

The present invention discloses a high and low temperature performance test box based on a mixed refrigerant and a control method, including a box body, a refrigeration chamber, a heating chamber, an electric refrigeration device, an electric heating device, and a support roller. The upper part of the box body is provided with a refrigeration chamber that penetrates forward, and the bottom is provided with a heating chamber that penetrates forward. The refrigeration chamber is provided with an electric refrigeration device, and the electric refrigeration device uses a mixed refrigerant for refrigeration, and the heating chamber is provided with an electric heating device. During the temperature test of the present invention, the heat transfer oil in the heat preservation tank is refluxed into the heat dissipation pipe by controlling the lifting mechanism to rise, and then the electric control stop valve is controlled to be cut off, and the electric heating device and the electric refrigeration device are controlled to be powered on to work. At this time, the heat transfer oil in the heat dissipation pipe can absorb the heat generated by the electric heating device, but the heat will not be dissipated to the outside to cause waste, but will be retained in the heating chamber to heat the object being tested.

The invention relates to a flowing medium packed bed energy storage system which comprises a storage tank for storing flowing media, the storage tank is connected with a flowing medium loop through a stop valve, the flowing medium loop comprises a flowing medium pump, a heater, a heat accumulator module and a heat exchanger which are sequentially connected through a pipeline, and the flowing medium pump provides power for flowing medium circulation; the heat accumulator module is composed of a plurality of heat accumulator units, and each heat accumulator unit is filled with a solid material. In the heat storage mode, the heater heats the flowing medium from the low-temperature state to the high-temperature state, and then the solid materials filled in the heat storage body units are heated through the heat storage body units. In the heat release mode, the flowing medium is heated from a low-temperature state to a high-temperature state after flowing through the high-temperature solid material, and then heat is released to an external system through the heat exchanger. Efficient heat exchange between a flowing medium and a solid material is achieved through the modular solid filling design, so that the heat storage efficiency of the whole system is improved, and the adaptability and flexibility of the system are enhanced.

The utility model provides a large-height-difference gravity liquid supply refrigerating system, which relates to the technical field of refrigerating systems and comprises a refrigerating compressor, an oil separator, a condenser, a first liquid storage device, an electric control valve, a gas-liquid separator, a heat exchanger, a second liquid storage device, a stop valve, a filter, a liquid supply electromagnetic valve, an electric control valve, an evaporator, a stop valve for a sensor and the sensor. The device comprises a micro gas-liquid separator, a stop valve, a one-way stop valve and a liquid level switch. According to the high-altitude-difference refrigerating system, the problems of energy consumption caused by a pump liquid supply mode adopted by a traditional high-altitude-difference refrigerating system and excessive refrigerant charge amount caused by multi-time liquid supply can be effectively reduced, and energy conservation and emission reduction are facilitated; the influence of a static liquid column of a large-height-difference gravity liquid supply system on heat exchange of the evaporator can be avoided; the refrigeration tail end adopts an oil-free cold carrying mode, so that the heat exchange efficiency of the evaporator can not be influenced by an oil film; in addition, gravity liquid supply is adopted in the system, the machine room can be arranged on the roof and does not occupy the storeroom volume, and the storeroom volume can be effectively increased.

The invention discloses a double-storage-tank nitrogen sealing system suitable for fused salt heat storage, which comprises a nitrogen making device, a nitrogen storage tank, a low-temperature tank and a high-temperature tank, the nitrogen making device is connected with a main valve, a nitrogen analyzer and a discharge pipe are arranged between the nitrogen making device and the main valve, a discharge valve is arranged on the discharge pipe, and the nitrogen storage tank is connected with the low-temperature tank. The inlet end of each nitrogen storage tank is connected with the outlet of the main valve through a respective gas inlet stop valve; the outlet end of each nitrogen storage tank is connected with an inlet of a self-operated nitrogen-sealed valve through a corresponding exhaust stop valve, an outlet of the self-operated nitrogen-sealed valve is connected with the middle of a communicating pipe through an electric quick-closing valve and a connecting pipe, and the two ends of the communicating pipe are connected with the gas phase area of the low-temperature tank and the gas phase area of the high-temperature tank respectively. The low-temperature tank and the high-temperature tank are each provided with a pressure transmitter and a first-stage breather valve, the pressure transmitters are connected with a controller of the electric quick-closing valve, and a pressure guide pipe of the self-operated nitrogen-sealed valve is connected with the gas phase area of the low-temperature tank and the gas phase area of the high-temperature tank. The nitrogen consumption can be reduced, failure of the nitrogen-sealed valve under the high-temperature working condition can be prevented, multi-stage pressure protection of the storage tank is achieved, and long-term stable and safe operation of the storage tank is guaranteed.

The invention discloses a high-temperature supercritical carbon dioxide steady-state jet flow experiment device and method, and the device comprises a liquid storage tank, a liquid booster pump, a plunger pump, a first mass flow meter, a second mass flow meter, a heating section, a first electric control valve, a first-stage cooler, a second-stage condenser, a back pressure valve, and a main loop system composed of related pipe fittings and equipment. The gas supply system consists of a carbon dioxide gas cylinder group, a gas storage tank, a gas booster pump and related pipe fittings and equipment; and the jet experiment section consists of a spray pipe, a second electric control valve, an electric stop valve and related pipe fittings and equipment. The invention further provides an experimental method of the device. According to the invention, the steady-state jet flow experiment research of supercritical carbon dioxide under the high-temperature condition can be realized.

The invention provides a multiphase hydrogen fuel flow and pressure cooperative control system, and belongs to the technical field of aero-engines, the multiphase hydrogen fuel flow and pressure cooperative control system comprises a liquid hydrogen tank, a liquid hydrogen pump, a heat exchanger, a pressure stabilizing valve, a regulating valve, a stop valve, a sensor and an engine main controller, the engine main controller receives engine state feedback and outputs a hydrogen fuel mass flow instruction; the pressure maintaining valve outlet pressure instruction calculation module and the pressure maintaining valve pressure closed-loop control module are arranged between the pressure maintaining valve and the engine, and the liquid hydrogen pump outlet pressure instruction calculation module and the liquid hydrogen pump outlet pressure compensation control module are arranged between the liquid hydrogen pump and the engine. The regulating valve outlet flow lead correction control module is arranged between the regulating valve and the engine; according to the scheme, the rotating speed of the liquid hydrogen pump, the opening area of the pressure maintaining valve and the opening area of the adjusting valve are cooperatively controlled, flow and pressure dynamic matching of the hydrogen fuel adjusting system under the non-stable working condition is achieved, and the flow control dynamic response performance of the hydrogen fuel adjusting system is improved.

The invention discloses an ultralow-temperature forged steel stop valve which comprises a stop valve body, a valve rod shell, a valve rod, an expansion mechanism, a limiting mechanism, a water conveying mechanism, a frame, a reciprocating lead screw, a moving block, an L-shaped supporting rod, an arc-shaped limiting plate and a rotating head. The top of the valve rod is connected with an expansion mechanism, the bottom of the valve rod is connected with a valve clack, the valve clack is in sealed contact connection with a channel in the stop valve body, a limiting mechanism is arranged outside a valve rod shell, and a water conveying mechanism is arranged on the side wall of the stop valve body. And the limiting mechanism comprises a frame, a reciprocating lead screw, a moving block, an L-shaped supporting rod, an arc-shaped limiting plate and a rotating head, a valve rod can be limited and fixed, the situation that the valve rod rotates due to accidental touch of an operator is avoided, meanwhile, the interior of a valve can be quickly unfrozen, and then the machining efficiency is improved.

The invention discloses a desulfurization stirrer, and belongs to the field of chemical equipment. A top cover is arranged at the top of a stirring tank, a discharging pipe is arranged at the bottom, three rotating shafts with stirring rods are inserted into the top cover, and a driving assembly composed of a motor, a driving shaft, a chain wheel and a chain drives the rotating shafts to rotate synchronously. The feeding hopper is inserted into one end of the top cover in a sliding mode, and an ejector rod of the feeding hopper is matched with a protrusion of the rotary disc on the driving shaft, so that the feeding hopper can swing to achieve uniform feeding. An adjusting structure is arranged, and the swing amplitude of the feeding hopper can be controlled through a hand wheel and other components. A stop valve, an organ shield, a controller and other components are further arranged. The stirrer can fully stir materials, is uniform in feeding, is flexible to adjust, is convenient and reliable to operate, and can effectively improve the desulfurization efficiency and quality.

The utility model provides a test support device mass balancing driving system and a flow field test system. The test support device mass balancing driving system comprises an oil transportation header pipe, two oil transportation branch pipes and an oil return header pipe, each oil conveying branch pipe is connected with the oil conveying main pipe through a first stop valve, and a second energy accumulator is connected to each oil conveying branch pipe; outlets of the two oil conveying branch pipes are respectively communicated with two oil cavities of the hydraulic cylinder; one oil conveying branch pipe is connected with an overflow valve, the overflow valve is connected with the oil return header pipe through a first oil return branch pipe, the other oil conveying branch pipe is connected with the oil return header pipe through a second oil return branch pipe, and a second stop valve is arranged on the second oil return branch pipe. The balancing of the mass of the test model supporting part in the sinking and floating movement process of the flow field test can be realized, and the mass of the test model supporting part does not influence the model test. In addition, by adjusting the pressure of the balance energy accumulator, namely adjusting the pressure of the second energy accumulator, the frequency of balancing motion can be achieved, and broadband quality balancing from low frequency to high frequency can be achieved.

The stop valve solves the technical problems that in the prior art, the upper limit of temperature and pressure is low, and abrasion and leakage are prone to occurring. The stop valve comprises a valve body, a valve seat, a valve cover and a valve rod. The valve body comprises a first channel and a second channel which are communicated with each other, the valve seat is located at the joint of the first channel and the second channel, the valve seat and the valve cover are detachably matched with the valve body, the valve rod is in sliding fit with the valve cover so that the valve rod can be close to or away from the valve seat, and when the valve rod is close to the valve seat, the valve rod can cut off the first channel and the second channel. All parts of the stop valve are detachably matched, so that the valve seat can be taken out for hard alloy surfacing, the use temperature and pressure of the stop valve are greatly improved, and the service life of the stop valve can be effectively prolonged.

The invention provides a flow field analysis method capable of optimizing an anti-blocking adjusting stop valve structure, and belongs to the technical field of stop valves, and the method comprises the following steps: S1, based on an energy minimum multi-scale model, dividing each phase medium into a dense phase and a dilute phase through calculation of each phase distribution in each region in a valve; s2, correcting an inter-phase momentum transfer resistance relationship of the liquid-solid two-phase quasi-fluid model, and establishing a mass transfer and drag action relationship between a dilute phase and a dense phase to form a first-stage model; s3, performing medium serialization on the physical image of the first-stage model to form a single dilute phase and a single concentrated phase, establishing a mass exchange and drag action relationship between the dilute phase and the concentrated phase, ensuring that the concentrated phase and the dilute phase meet mass conservation, and constructing a second-stage model; according to the method, the defects of homogeneous hypothesis are corrected through the multi-stage model, the influence of particle aggregation on flow can be reflected, liquid-solid two-phase flow simulation is closer to the actual working condition, and the prediction error of the erosion risk area is greatly reduced.

The utility model belongs to the technical field of inflatable boats, and discloses a high-pressure rapid inflation system for an inflatable boat and the inflatable boat. The inflation system is applied to the inflatable boat, in the process of throwing the inflatable boat to the sea surface, the stop valve is triggered to open the first air supply pipeline, high-pressure air in the high-pressure air cylinder is released instantly, and the high-pressure air is conveyed to a boat body of the inflatable boat through the first air supply pipeline, a first air inlet connector of the diverter valve, an air outlet connector of the diverter valve and the inflation pipeline; the boat body of the inflatable boat can be quickly filled with air, so that the time is greatly shortened, and the rescue efficiency is improved; the inflatable boat basically floats on the sea surface after being launched, and the requirements for water tightness and air inlet design of the electric air supplementing pump part are low; the pressure transmitter monitors the gas pressure in real time, and when the pressure of the air chamber of the inflatable boat body is lower than a set value, the control unit triggers the electric air supplementing pump to start to supplement air to the air chamber of the boat body of the inflatable boat through the second air supply pipeline, the second air inlet connector of the diverter valve, the air outlet connector of the diverter valve and the inflation pipeline.

The invention discloses a multistage closed-loop recovery method and system for industrial flue gas waste heat, and particularly relates to the technical field of waste heat recovery. The method comprises the following steps: predicting a process steam demand through a high-temperature section temperature parameter in flue gas monitoring data, and predicting a preheating medium demand based on a low-temperature section temperature parameter in the flue gas monitoring data; inputting the high-temperature-section demand prediction result and the low-temperature-section demand prediction result into a dynamic heat balance equation, calculating an optimized set point of a three-stage compressor unit, and adjusting the rotating speeds of a centrifugal compressor, a screw compressor and a scroll compressor by adopting a fuzzy PID (Proportion Integration Differentiation) algorithm; collecting temperature and flow data of secondary waste heat after the industrial equipment is reused, and generating secondary waste heat monitoring data; according to a compressor adjusting instruction and secondary waste heat monitoring data, the real-time opening degrees of the two-way stop valve and the electric adjusting valve are controlled, backflow of secondary waste heat to the interstage heat exchanger set is achieved, closed-loop recycling of industrial flue gas waste heat is completed through countercurrent flow heat exchange, and the waste heat recycling efficiency and the system stability are improved.

The invention discloses a safety braking hydraulic system for a main elevator of a ship lift and a control method. The hydraulic system comprises an oil tank, a first motor pump set, a second motor pump set, a first high-pressure filter, a second high-pressure filter, a first one-way valve, a second one-way valve, a pressure gauge, a first pressure sensor, an energy accumulator, a stop valve, an oil return filter, a safety brake module and a working brake module. A safety brake loop is provided with a two-way cartridge valve and an electromagnetic directional valve, quick response and brake loosening and locking synchronization are achieved, a working brake loop is provided with an overflow valve and a proportional overflow valve, the proportional overflow valve, a PLC, a third pressure sensor and a speed encoder form a closed-loop system, the voltage of the proportional overflow valve is accurately adjusted according to oil pressure and speed, and the safety brake loop is controlled. The braking torque is timely controlled, stable braking is guaranteed, potential safety hazards such as poor synchronism and uncontrollable braking of a traditional hydraulic system can be eliminated, and safe operation of the main elevator is guaranteed.

Shut-off valves for cryogenic fluids are disclosed herein. An example valve includes a valve body defining a flow path and a valve seat, a bonnet coupled to the valve body and defining a bonnet chamber, a plug, and a stem coupled to the plug. The stem is configured to slide to cause the plug to slide. The valve includes a spindle that includes external threads. The spindle is configured to move along a longitudinal axis of the bonnet as the spindle is rotated about the longitudinal axis via the external threads to cause the stem to slide linearly along the longitudinal axis. The valve includes a pivot ball positioned between and operatively coupled to the stem and the spindle. The pivot ball is configured to translate linear and rotational movement of the spindle into linear movement of the stem and the plug.

The invention provides a full-size low-temperature medium outflow test system and an outflow test method. The system comprises a control system, an end socket, a storage tank, a conveying main pipeline, a pressure accumulator, a discharge pipeline, a filling pipeline, an air sealing pipeline, a pressurizing pipeline, a pressurizing tank, a liquid nitrogen filling tank car, a flow meter, a filling port, a regulating valve, a stop valve and an air sealing port. According to the system, a full-size test platform is built, low-temperature liquid nitrogen is used for replacing a low-temperature propellant, the working states of the pressurized conveying system under different flows and pressures are simulated, and the requirement that the system obtains the flowing performance closer to the real working condition through test examination under a low-temperature medium is met.

The utility model discloses a stop valve leak detection tool which comprises an operation table and a stop valve body, a fixed box is fixedly installed on the right side of the top of the operation table, a sliding box is connected to the left end of the top of the operation table in a sliding mode, and a plurality of liquid outlet pipes are symmetrically installed on the opposite sides of the fixed box and the sliding box. The liquid outlet pipe is communicated with an inner cavity of the fixed box and an inner cavity of the sliding box, a plurality of stop valve supporting blocks are arranged between the sliding box and the fixed box, and the stop valve supporting blocks slide on the top of the operation table. The stop valve body is placed on the top of the stop valve supporting block, the liquid outlet pipe is connected with the stop valve body through sliding of the sliding box, the bright color leakage detection liquid is injected into the inner cavity of the stop valve body through the water pump, and whether the surface of the stop valve body leaks or not is observed so that the sealing performance of the stop valve body can be judged. The leak detection tool is simple in operation, can carry out leak detection operation on a plurality of stop valve bodies at the same time, and improves the efficiency.

The invention discloses a multi-stage buffering toughness stop valve, relates to the technical field of valves, and aims to solve the problem that an existing valve cannot effectively relieve the impact of fluid on a valve element. A valve element of the stop valve is mainly composed of an outer valve element body, a middle valve element body and an inner valve element body, the inner valve element body is arranged in an element cavity defined by the outer valve element body and the middle valve element body in an axial moving mode, an elastic assembly is arranged between the inner valve element body and the inner end wall face of the element cavity, and therefore when fluid impacts the valve element, the valve element is not damaged. The fluid flowing into the core cavity can drive the inner valve element to move axially and extrude the elastic assembly, part of kinetic energy of the fluid is converted into elastic potential energy of the elastic assembly, the impact effect of the fluid on the valve element is relieved, particularly transient impact caused by fluid flow speed changes is relieved, the service life of the valve element is prolonged, and the reliability of the valve element is improved. Moreover, the internal cavity channel of the valve core of the stop valve can reduce the flow speed of the fluid and improve the flowing stability of the fluid, so that the impact of the fluid on the valve core is further relieved.

The invention relates to a multifunctional integrated liquid cooling plate testing machine which comprises a cabinet body, a testing inlet pipe and a testing outlet pipe which are used for being connected with a liquid cooling plate are arranged on the cabinet body, a pure water tank and a nitrogen cylinder are arranged in the cabinet body, a first liquid outlet and a first liquid return opening are formed in the pure water tank, the first liquid outlet is communicated with the testing inlet pipe through a first pipeline, and the first liquid return opening is communicated with the testing outlet pipe through a second pipeline. The first liquid return port is communicated with the test outlet pipe through a second pipeline, the first pipeline is provided with a variable frequency circulating pump, the nitrogen cylinder is communicated with a third pipeline, the third pipeline is connected with the first pipeline through a first stop valve, the first stop valve is communicated with a fourth pipeline, and the fourth pipeline is connected with the second pipeline through a first three-way valve. The first pipeline, the second pipeline, the third pipeline and the fourth pipeline are provided with a cleanliness testing assembly, a thermal resistance testing assembly and an air tightness testing assembly. The liquid cooling plate testing device has the effect of realizing integrated testing of the liquid cooling plate.

The utility model discloses a liquid return impact experiment device for a low-pressure cavity scroll compressor, and relates to the technical field of experiment equipment, in particular to the liquid return impact experiment device for the low-pressure cavity scroll compressor. One end of a first stop valve is connected with an exhaust pipeline of a tested compressor, and the other end of the first stop valve is connected with an inlet of a gas-liquid separator; an outlet of the gas-liquid separator is connected with a second stop valve; the second stop valve is connected with the electronic expansion valve through an electronic expansion valve pipeline; the electronic expansion valve pipeline is connected with a bypass pipeline in parallel, and a third stop valve is arranged on the bypass pipeline; an outlet of the electronic expansion valve is connected with a fourth stop valve; the fourth stop valve is connected with the liquid sight glass; and the liquid sight glass is connected with an air suction pipeline of the tested compressor. According to the technical scheme, the problems that an existing compressor glow test device in the prior art is complex, whether liquid returns or not is not easily judged, the experimental period is long, and the overall liquid impact resistance of the compressor cannot be rapidly and accurately evaluated are solved.

The utility model relates to the field of filter screen devices, in particular to an energy-saving filter screen device for air conditioning, which comprises an air supply box, an end flange of the air supply box is connected with a filter pipe, an end flange of the filter pipe is connected with a three-way pipe, one end flange of the three-way pipe is connected with an air supply pipe, and a pipe body of the air supply pipe is provided with an electric control valve. A three-way pipe is arranged at one end of the filter pipe, a flange at the other end of the three-way pipe is connected with a blow-off pipe, a stop valve is arranged on a pipe body of the blow-off pipe, an air supply assembly is arranged in the air supply box, and a filter screen assembly and a dredging assembly are arranged in the filter pipe. The defects that the ventilation effect is not ideal due to blockage of the filter screen, and electric energy consumption needs to be enhanced to achieve the expected ventilation effect are effectively overcome, energy saving is facilitated, the filter screen assembly does not need to be disassembled, use is convenient, and dredging is convenient.

The utility model relates to the technical field of stop valves, in particular to a corrugated pipe stop valve special for phosgene, which comprises a valve body, a fixing piece is fixed on the upper surface of the valve body, a connecting flange is fixed at the upper end of the fixing piece through a bolt, and two baffles are symmetrically fixed in the valve body. The left sides of the two baffles are both connected with movable gaskets, two movable plates are fixed to the left sides of the movable gaskets, guide rods fixed to the valve body penetrate through the interiors of the two movable plates, and the outer surfaces of the guide rods are sleeved with springs connected with the movable plates in an abutting mode. The tail end of the spring is connected with a limiting block in an abutting mode, wherein the limiting block and the guide rod are fixed. According to the utility model, through the arrangement of the baffle plate, when a medium suddenly enters the valve body, the movable gasket is pushed to move, the movable plate is driven to move, and the movable plate pushes the spring to compress, so that the impact force of the medium is absorbed, the impact force of the medium on the valve core is reduced, the service life of the valve core is prolonged, and the practicability is improved.

The invention relates to a system and a method for rapidly switching energy storage and release modes of a large compressed air energy storage power station. The system comprises a compressor unit, a compression side heat exchange system, a cooler, an expansion unit, an expansion side heat exchange system, a salt cavern, a low-temperature heat storage device, a high-temperature heat storage device, a switching valve, a high-temperature heat storage circulating pump, a low-temperature heat storage circulating pump, a stop valve, a motor and a generator. The compressor unit is connected to the salt cavern, the low-temperature heat storage device and the high-temperature heat storage device through the compression side heat exchange system and the cooler; the expansion unit is connected to the salt cavern, the low-temperature heat storage device and the high-temperature heat storage device through the expansion side heat exchange system; a switching valve is arranged between the compressor unit and the expansion unit. According to the invention, rapid switching between the energy storage mode and the energy release mode of the compressed air energy storage power station is realized, so that the increasingly frequent peak regulation requirement of a power grid is met.