89results about "Variable capacity gas holders" patented technology

The invention discloses a thin film tank pump tower base device, and belongs to the technical field of LNG storage and transportation, the thin film tank pump tower base device comprises a base main body, the base main body is cylindrical, the periphery of the base main body is provided with a first connecting part, and the first connecting part is connected with a first shielding layer; wherein the first connecting part is annular, the first shielding layer is formed by splicing two corrugated plates, the two corrugated plates are integrally formed, a circular through hole is formed in the connected end face of the two corrugated plates, and the two corrugated plates are directly connected with the first connecting part. According to the pump tower base, the corrugated plate is integrally formed, the base body is directly connected with the specially-made corrugated plate, the problem that a conventional pump tower base needs to be in transition connection through a connecting plate is solved, the problem that the connecting plate and the corrugated plate are not smoothly connected is solved, the installation procedure of the pump tower base can be simplified, and the preparation efficiency of a thin film tank is improved.

The invention discloses a special bottom plate drainer for a rubber membrane sealing type gas holder, which comprises a drainer body arranged above the liquid level of a water accumulation pool; one end of the inlet pipe is connected with the drainer body, and the other end of the inlet pipe is connected with a water outlet of a bottom plate of the gas holder; one end of the U-shaped pipe is connected with the drainer body; and the condensed water discharge port is used for discharging condensed water into the water accumulation pool, and the condensed water discharge port is connected with the other end of the U-shaped pipe. The drainer body is lifted to the position above the liquid level of the water accumulation pool from the bottom of the water accumulation pool, condensate water on the bottom plate is safely and efficiently drained, meanwhile, it is ensured that the drainer body cannot be soaked in the condensate water, and the service life of the drainer body is prolonged. The drainer body is lifted from the bottom of the water accumulation pool to the position above the liquid level of the water accumulation pool, so that people do not need to enter the water accumulation pool when the drainer body is cleaned, and the cleaning efficiency is greatly improved.

This invention discloses a compressed air energy storage system and its operation method based on underground flexible gas storage. The system includes compression, thermal storage, gas storage, expansion power generation, and control subsystems. The gas storage utilizes an underground flexible composite material gasbag with an external sliding layer and concrete lining layer, connected in parallel with a backup rigid gas tank and a fast switching valve to improve sealing, geological adaptability, and operational safety. The thermal storage subsystem forms a closed-loop heat transfer medium circulation with the reheater, achieving efficient recovery and utilization of multi-stage compression heat. The control subsystem can quickly adjust power according to grid frequency deviations to meet primary frequency regulation requirements. This invention solves the problems of high leakage risk, poor geological adaptability, low system efficiency, and slow frequency regulation response of traditional gas storage devices, offering advantages such as reliable sealing, high efficiency, fast response, and low cost. It is suitable for wind and solar new energy bases, grid peak shaving and frequency regulation, and distributed energy scenarios.

The present invention provides a piston drift warning method and device for a sleeve gas cabinet, relating to the field of gas cabinet detection technology. The sleeve gas cabinet piston drift warning method includes: obtaining the operating height of the piston and the spacing between the edge of the piston and the inner cabinet wall or the inner wall of the sleeve at the same time, wherein the operating height is the height of the piston from the bottom wall of the cabinet; determining the relative positional relationship between the piston and the sleeve based on the relationship between the operating height and the sleeve wall height; and providing a piston drift warning based on the relative positional relationship, the spacing, and the drift allowance. This invention effectively solves the problem of online measurement and warning of piston drift in gas cabinets with inner sleeves.

The utility model discloses a continuous pressurizing device which comprises a continuous pressurizing assembly which comprises an air bag, an air outlet head communicated with the bottom face of the air bag, an air inlet head communicated with the side face of the air bag and a to-be-tested instrument tube arranged below the air bag. A connecting assembly, the connecting assembly comprises a round pipe arranged below the air outlet head, a threaded pipe communicating with the round pipe, a first groove opening formed in the outer wall of the round pipe, a connecting pipe arranged below the threaded pipe, a first internal thread formed in the connecting pipe, an annular baffle fixed to the outer wall of the connecting pipe and a conical connector communicating with the connecting pipe. The air inlet pipe is arranged at the air inlet head; and the valve is connected with the air inlet pipe. According to the utility model, the continuous pressurizing assembly and the connecting assembly are matched with each other, so that long-time continuous air pressure can be provided under the condition of no power supply, even if air inlet is interrupted, continuous pressurizing can still be ensured, the use is convenient, the cost is low, and the chromatography efficiency of the chromatographic column is improved.

The utility model provides a capsule sealing mechanism for water storage and supply equipment, which is characterized in that two ends of a built-in rubber capsule are provided with convex parts, and a capped round sleeve and an air inlet and outlet metal nozzle which are respectively arranged at two ends of a high-pressure hydrogen cylinder are respectively provided with annular caulking grooves corresponding to the convex parts; the inner side of the tail end of the built-in rubber capsule is wedged with an annular caulking groove of the capped round sleeve through a convex part, the outer side of the tail end of the built-in rubber capsule is propped against the shell, and the capped round sleeve is fixedly connected with the shell; the inner side of the head end of the built-in rubber bag is in wedge connection with an annular caulking groove of the air inlet and outlet metal nozzle through a protruding part, the outer side of the head end of the built-in rubber bag abuts against the shell, and the metal nozzle locking piece is connected with the air inlet and outlet metal nozzle in a fastened mode and abuts against the shell. In the 360-degree range, the two sides of the tail end of the built-in rubber capsule are tightly attached to the round sleeve with the cap and the shell, the two sides of the head end of the built-in rubber capsule are tightly attached to the air inlet and outlet metal nozzle and the shell, the connection stability among the high-pressure hydrogen cylinder, the built-in rubber capsule and the shell is guaranteed, and the situation of water leakage is avoided.

A recovery cryostat, external to a cryogen storage tank, uses a cryocooler to condense vapor of cryogen from the storage tank and return the cryogen to the storage tank as a liquid. The process may be continuous or cyclical depending on the orientation of the recovery cryostat. If the recovery cryostat is located such that liquid can drain back to the storage tank, the process can be continuous. If the liquid cannot be drained back, a valve on the liquid return line is closed while the cryocooler condenses the vapor, a valve on the vapor supply line is then closed, the valve on the liquid return line is opened, and pressure in the recovery cryostat is increased to drive the liquid out. The storage tank is a type that can have vapor that boils off external to the tank be returned to the vapor space above the liquid in the tank.

The invention belongs to the technical field of marine geological exploration, and relates to a self-leveling detection platform for a submarine monitoring instrument and a use method thereof.The self-leveling detection platform comprises a platform body and a self-leveling system, the self-leveling system comprises a sensing module used for pre-scanning submarine topography, monitoring the bearing state of an air bag in the leveling process and monitoring the posture of the platform after leveling, and the sensing module is used for sensing the self-leveling detection platform; the obtained data are transmitted in real time; the control module comprises a signal processor used for processing the sensing data and generating a control instruction; the power source module comprises a compressed air cylinder and an adjusting valve assembly and is used for providing stable air flow for the air bag; the execution module comprises a plurality of independent air bags, and the power source module is connected with the air bags so as to inflate the air bags. According to the invention, terrain pre-judgment can be carried out, and landing of the platform within an allowable gradient range is ensured; the posture of the platform is dynamically adjusted through the air bag, and the platform is accurately adjusted from an inclined state to a horizontal state; and the platform can be leveled again in the operation process, so that the stable operation of the platform in a complex seabed environment is ensured.

To provide a wear amount measuring device that eliminates the need of installation of instruments such as a permanent magnet and a magnetic force detector in seal member wear amount measurement operations, and can accurately, simply, and easily perform the seal member wear amount measurement operations.SOLUTION: A wear amount measuring device 20 comprises: a measuring member 21 that is pressed against a seal member 13a and an attachment fitting 14a to change its shape, wherein lengths L21C, L21C' of a portion 21C in contact with the seal member 13a are changed according to distances L1, L1' between a side plate 3 and the attachment fitting 14a; a holding member 24 that holds the measuring member 21; and a rod-like member 25 that is attached to the holding member 24 at one end and provided with a vertical measurement auxiliary bar 26 at the other end. The vertical measurement auxiliary bar 26 is provided crossing a longitudinal direction of the rod-like member 25 so that one end face 26a of the vertical measurement auxiliary bar 26 is flush with one end face 24a of the holding member 24.SELECTED DRAWING: Figure 11

The utility model discloses an anti-leakage monitoring device for a double-membrane gas storage cabinet, relates to the technical field of double-membrane gas storage cabinets, and aims to solve the problems that gas pressure detection devices are arranged on the outer sides of gas conveying pipelines of existing double-membrane gas storage cabinets to prevent gas leakage of the pipelines, but gas pressure cannot be detected in a space between an inner membrane and an outer membrane. According to the technical scheme, the double-film gas storage cabinet solves the problems that in the prior art, a leakage-proof monitoring device convenient to use is lacked, once gas in an inner film leaks, monitoring cannot be conducted in time, and safety is low in the prior art, and the double-film gas storage cabinet is mainly characterized by comprising a double-film gas storage cabinet body, and a detection gas pipe is fixedly connected to the outer side of the double-film gas storage cabinet body; a gas wireless pressure detector is mounted at one end of the outer side of the detection gas pipe, a connecting piece and a joining piece are arranged at the two ends of the outer side of the mounting plate respectively, a screw is inserted into the connecting piece, an electromagnetic valve is fixedly connected to the outer side of the detection gas pipe, and a wireless receiving device is arranged on the outer side of the double-film gas storage cabinet body. And the effect of convenient use is achieved.

The invention relates to a method for measuring the volume of a first gas space and / or a second gas space in a gas storage tank (10) with an outer shell (30). In this method, the first gas space (G1), which is delimited by at least one movable membrane (20), is filled with a first gas. The second gas space (G2), also delimited by the at least one movable membrane (20), is filled with a second gas. Once the gas spaces are filled, the position of the membrane (20) separating the first gas space (G1) and the second gas space (G2) is determined. Based on the determined position values, the volume of the first gas space (G1) and / or the second gas space (G2) is calculated. For the position determination, the movable membrane (20) forms a surface that defines a plane (E), wherein the plane (E) is or forms the boundary between the first gas space (G1) and the second gas space (G2).The position of the membrane within the gas storage (10) is also determined with respect to at least one measuring point (M1 / M2), preferably using an optical, mechanical, acoustic and / or electrical measuring method.

The storage apparatus according to the invention, a geo hydrogen storage system, is a system consisting of a plurality of groundwater wells drilled into the ground. Hydrogen is produced by electrolysis using green energy. The hydrogen and the associated oxygen are stored in and recovered from cartridges installed in said wells being flooded by the groundwater and located at appropriate distances from each other. The system uses closed-circuit circulating water to transport the gases generated in electrolysis in the form of bubbles. The gases are separated from the circulating water by volume expansion and form gas bubbles when they reach the corresponding cartridge. This gas bubble will, with continued operation, squeeze larger and larger volume of water from the groundwater in the cartridge, thereby pressurizing the system.

The invention relates to the technical field of gas cabinets, in particular to a gas cabinet multi-sensor cooperative interlocking intelligent emergency bleeding control method and system, and the method comprises the steps: obtaining the state information of a gas cabinet, the state information comprises cabinet capacity data, bleeding valve position state data and leakage gas concentration data; based on the cabinet capacity data, judging whether the cabinet capacity of the gas cabinet is in a safe interval; when the relief valve position state data continuously indicates that the relief valve is in an unclosed state, the leaked gas concentration data continuously exceeds a preset leakage threshold value and reaches a first time threshold value, and meanwhile, the cabinet capacity is in a safety interval, a stop valve at an inlet of the relief pipeline is controlled to be closed within first preset time; and the cabinet capacity data decline rate is calculated in real time, when the cabinet capacity decline rate exceeds a preset safe decline rate threshold value, the stop valve at the inlet of the diffusion pipeline is controlled to be closed within second preset time, and the second preset time is shorter than the first preset time. Automatic emergency response under the blow-off valve fault state is achieved.

A recovery cryostat, external to the cryogenic material storage tank, uses a cryocooler to condense the cryogenic material vapor received from the storage tank and return it to the storage tank as liquid. This process can be continuous or periodic, depending on the location of the recovery cryostat. If the recovery cryostat is located in a position where it can return liquid to the storage tank, the process can be continuous. If liquid cannot be returned to the storage tank, the liquid return line valve is closed while the cryocooler is condensing the vapor, the vapor supply line valve is closed, and then the liquid return line valve is opened to increase pressure in the recovery cryostat and drain the liquid. The storage tank is of a type that allows vapor boiled outside the storage tank to be returned to the vapor space above the liquid in the storage tank.

The present invention relates to the field of gas storage systems and concerns a pneumatic membrane gas reservoir (1) for storing hydrogen gas at low pressure, comprising: a bag-like first membrane (10) adapted to delimit a hydrogen storage chamber (C1); a second membrane (20) adapted to partially delimit a pressurized chamber (C2) at least partially overlapped by the storage chamber (C1); a second membrane (20) placed on the first membrane (10), fixed impermeably at least to the second membrane (20) and arranged together with the first membrane (10) on the outside of the gas reservoir (1). a third membrane (30) adapted to define a cavity (2) opening towards the side; hydrogen supply and discharge means associated with the storage chamber (C1); means for pressurizing the pressurized chamber (C2) with air; mechanical fastening means (4) against the base surface (S) of the first membrane (1), the second membrane (20) and the third membrane (30); a natural passive ventilation system for ventilating any hydrogen losses to the outside, comprising a duct (5) adapted to connect the cavity (2) through the pressurized chamber (C2) to the outside environment.

The application provides a kind of gas cabinet piston inclination monitoring system and monitoring method, piston has circular upper surface, the gas cabinet piston inclination monitoring system includes: height measuring device and control terminal;N monitoring points are preset on the upper surface, wherein N is even number greater than 2, the number of height measuring device is N, and is one-to-one corresponding setting in N monitoring points;Height measuring device includes the cylinder body containing liquid, support and liquid level sensor, cylinder body is fixedly connected on its corresponding monitoring point by support, liquid level sensor is arranged on cylinder body, and is electrically connected with control terminal;Liquid level sensor acquires liquid level information in cylinder body in real time, and the information is sent to control terminal, and control terminal judges the inclination of piston according to the liquid level information in the N cylinder bodies of the N height acquisition devices received.The application not only can reduce labor cost, but also has the advantages of high measurement accuracy, thereby ensuring the safe operation of gas cabinet.

The invention discloses a non-invasive hydrogen injection device, and relates to the technical field of non-invasive hydrogen injection, the non-invasive hydrogen injection device comprises a machine shell, a pressure container cylinder is embedded in the upper end face of the machine shell, a detachable container cylinder cover is arranged at an opening of the upper end of the pressure container cylinder, and the space in the pressure container cylinder is used for temporarily sealing and placing a container to be injected with hydrogen; the bottom wall of the pressure container is connected with an electrolytic hydrogen production device, a circuit control board is integrated on the back face of the control screen, and the electrolytic hydrogen production device is electrically connected with the circuit control board through a wire. Hydrogen and oxygen are generated in clean water in a container in a PEM electrolysis mode, the hydrogen and the oxygen are separated, the oxygen is discharged through a pressure relief device, the hydrogen is continuously increased to form the pressure of 0.5-0.6 MPa, hydrogen molecules permeate into a sealed package from the outside under the action of the pressure due to the fact that the particle size of the hydrogen molecules is small, the original sealed package is not damaged, and the service life of the sealed package is prolonged. Therefore, the hydrogen can permeate into the sealed plastic package in a non-invasive mode, and the hydrogen can be injected without damaging the sealing performance of the plastic container.

The invention relates to the technical field of gas cabinets, in particular to a device for replacing a steel wire rope guide wheel without stopping a gas cabinet, which comprises a base, a guide wheel mechanism is arranged in the base, the guide wheel mechanism comprises an auxiliary wheel moving in the base, a bearing wheel is further arranged in the base, and the bearing wheel is connected with a steel wire rope. The auxiliary wheel and the steel wire rope are arranged on the same plane, an auxiliary mechanism is further arranged in the base and comprises a movable plate moving in the base, a piston cylinder is arranged at one end of the movable plate, a connecting column is connected to the movable plate, and the piston cylinder is connected with the connecting column. The steel wire rope fixing device aims to assist in fixing the steel wire rope through contact extrusion of the fixing hand, the auxiliary wheel and the steel wire rope, the situation that the steel wire rope deviates when the steel wire rope is jacked up by the auxiliary wheel, normal work of the device is affected is avoided, and personal safety of workers is guaranteed.

The invention relates to the technical field of geothermal fluid water-vapor separation, and discloses a geothermal well high-temperature geothermal fluid sample water-vapor separation device and method.The geothermal well high-temperature geothermal fluid sample water-vapor separation device comprises a shell and a bottom plate, the bottom plate is arranged on one side of the shell, the front side of the shell is fixedly connected with a feeding pipe, and the top of the shell is fixedly connected with a box. Through the design of the gas collecting mechanism, after geothermal fluid passing through the interior of the shell is subjected to water vapor separation, separated gas enters the detachable gas storage units, the detachable gas storage unit at the tail end can be expanded firstly, and after the detachable gas storage unit on the edge side is expanded to the maximum value, the detachable gas storage unit at the tail end can be expanded to the maximum value. After the valve, facing one end of the detachable gas storage unit, of the adjacent detachable gas storage unit can be closed, the detachable gas storage unit on the outermost side can be taken down and replaced, and in the replacement process, the whole separation work of the device does not need to be closed, and the other detachable gas storage units can continue to store gas, so that the separation efficiency is guaranteed; and the detachable gas storage units are relatively light in weight, so that more labor is saved in the carrying process of workers.

A method is provided for conveying brine solution in a compressed gas energy storage system. The method includes: measuring a present temperature of a layer of brine solution stored in an accumulator of the compressed gas energy storage system, the accumulator may include an accumulator interior at least partially encapsulated by a salt layer; heating, using a heater subsystem, a brine solution stored in a brine solution source / sink to a temperature equal to or greater than the present temperature of the layer of brine solution in the accumulator; and after determining the brine solution stored in the brine solution source / sink is at the temperature equal to or greater than the present temperature of the layer of brine solution in the accumulator, conveying the brine solution stored in the brine solution source / sink to the accumulator.

The utility model discloses a cabinet position interlocking device for a rubber film gas cabinet, and relates to the technical field of gas cabinets. A steering member; the guide rail extends in the vertical direction; the counterweight piece is arranged on the guide rail, and is connected with the gas holder piston after being wound on the steering piece through a steel wire rope; the first cabinet position interlocking mechanism is used for being installed outside the side wall of the gas cabinet and comprises a first box body and a second box body, the first travel switch is arranged in the first box body; the first transmission mechanism can rotate, part of the first transmission mechanism is located in the first box body, part of the first transmission mechanism is located outside the first box body, and the counterweight part can touch the first transmission mechanism located outside the first box body in the process of moving upwards along the guide rail, so that the first transmission mechanism rotates and triggers the first travel switch; and the second cabinet position interlocking mechanism is mounted outside the side wall of the gas cabinet. According to the invention, low-position and high-position interlocking of the cabinet volume can be realized through a mechanical structure.

The utility model discloses an energy-saving wet-type gas holder, belongs to the technical field of containers for storing industrial gas, and aims to solve the problems of high energy consumption, local freezing risk, high maintenance and use cost and the like in the prior art that a wet-type gas holder needs to take heat preservation measures when running in winter. Therefore, the utility model provides an energy-saving wet-type gas holder which comprises a gas holder device, a wind power device, an air compression device and an air buffering device. According to the gas holder, wind energy is converted into heat energy through the air compression device and the wind power device, the anti-freezing problem after a water seal tank leaks out of a water pool is solved, and meanwhile compared with steam heat tracing and electric heat tracing, the equipment cost and the use cost are greatly reduced; in addition, when the gas holder does not need to heat the water seal in non-winter, the emptying pipeline on the jacket can be used for grid connection of a low-pressure steam pipe network.

The invention discloses an installation method of a rubber membrane of a rubber membrane sealing type gas chamber. Comprising the following steps: (1) firstly, mounting the upper end of a rubber film on sealing angle steel at the upper part of a gas chamber; (2) after the upper end of the rubber film is installed, the rubber film at the lower end is not installed temporarily, and the rubber film stands for 1-2 days under the action of gravity to reach a natural vertical state; 3) performing wrinkle control on the lower-end rubber film; (4) holes are formed in the lower end of the rubber film on site, and the number and positions of the holes are consistent with those of the holes of the sealing channel steel; and 5) installing the lower end of the rubber film at the sealing channel steel at the outer edge of the gas chamber piston. According to the mounting method for the rubber membrane of the rubber membrane sealing type gas chamber, the opening in the lower end of the rubber membrane is kept consistent with the opening of the sealing channel steel, mounting errors caused by inconsistency of the opening of the membrane and the opening of the channel steel are reduced, and the problem that the membrane wrinkles are too large due to an existing membrane mounting method is solved; and the mounting precision of the gas chamber leather film is improved.

The utility model discloses a coke oven gas cabinet with an inclination detection function, which is applied to a gas cabinet body, a piston is horizontally arranged in the gas cabinet body, an anti-inclination rod is vertically and upwards connected to the center position of the piston, an anti-inclination cylinder is vertically sleeved outside the anti-inclination rod, the anti-inclination cylinder is positioned right above the piston, and the piston is connected with the anti-inclination cylinder. The top end of the anti-inclination cylinder extends out of the gas cabinet body, a plurality of sets of correcting devices are installed on the anti-inclination cylinder in the vertical direction, and each correcting device comprises a plurality of rolling ball correcting assemblies which are evenly arranged in the circumferential direction; the utility model has the beneficial effects that the inclination prevention rod is designed on the piston, so that the inclination monitoring of the piston is converted into the inclination monitoring of the inclination prevention rod, the detection becomes simpler and more convenient, the inclination monitoring device of the inclination prevention rod is positioned outside the gas chamber, the structure is simpler and more reliable, and the cost is lower. And meanwhile, the inclination of the piston is indirectly corrected by designing a correcting device of the anti-inclination rod.

The utility model discloses a device for reducing splashing of sealing oil of a gas holder, which comprises a gas holder body, a preparation oil tank arranged on the gas holder body, an overflow hole arranged on the preparation oil tank close to a side plate of the gas holder body, a piston arranged inside the gas holder body, and a piston oil groove formed between the side plate of the gas holder body and the lower portion of the piston. The piston oil groove is used for storing sealing oil, the upper portion of the piston is provided with a splashed oil collecting plate which is obliquely arranged, the upper end of the splashed oil collecting plate is covered with a screen, and a brush is installed at the position, close to a side plate of the gas holder body, of the splashed oil collecting plate. By arranging the splashed oil collecting plate, the screen and the brush, when sealing oil flows down from the overflow hole and part of liquid drops fall on the screen of the splashed oil collecting plate, the sealing oil at the upper part of the piston can be prevented from splashing; and meanwhile, the brush is mounted at the position, close to the side plate of the gas chamber body, of the splashed oil collecting plate, so that the sealing oil collected by the splashed oil collecting plate can be prevented from secondary splashing before falling into a piston oil groove.

The invention provides a displacement-pressure double-closed-loop control-based intelligent pressure stabilizing system for an outer-steel inner-film gas holder and the gas holder. The system comprises a controller, a displacement detection module, a pressure detection module and a pressure stabilizing execution module, by monitoring the displacement amount and the internal pressure of the inner membrane in real time, the controller adopts a double-closed-loop control algorithm to cooperatively drive the air blower and the pressure release valve, and precise pressure stabilization is achieved; the gas storage cabinet adopts an outer-steel inner-film structure, a pressure regulating chamber of 1-2m is formed between the gas storage cabinet and the outer-steel inner-film structure, and the operating pressure can reach 4-10kPa; the double-membrane gas holder has the cost advantage of a double-membrane gas holder and the characteristics of high pressure and large capacity of a steel gas holder, the defects of response lag and low control precision of a traditional gas holder are overcome through intelligent control, meanwhile, the problems of low pressure, membrane permeation, membrane damage and the like of the double-membrane gas holder are solved, and an efficient and reliable solution is provided for industrial gas storage.

The application provides a control method and device of a gas charging and discharging equipment, a vehicle and a readable storage medium. The method comprises the following steps: when it is detected that the volume of the gas charging and discharging equipment changes, the gas charging and discharging equipment is charged and discharged to obtain the current gas charging and discharging efficiency of the gas charging and discharging equipment; when the current gas charging and discharging efficiency does not belong to the expected gas charging and discharging efficiency range, the gas charging and discharging equipment is charged and discharged to adjust the current gas charging and discharging efficiency, so that the adjusted current gas charging and discharging efficiency belongs to the expected gas charging and discharging efficiency range. By using the application, the volume of the gas charging and discharging can be maintained within a reasonable range, the good air tightness and gas supply efficiency of the gas charging and discharging equipment are ensured, the service life of the gas charging and discharging equipment is prolonged, and the applicability is high.

The invention belongs to the technical field of energy storage, and relates to a pressure-stable multi-energy co-production compressed air energy storage system which comprises a first compressor, a first cooler, a high-pressure tank, a first heater, a first turbine, a heat storage unit, a constant pressure unit, a heat supply unit and a cold supply unit. The telescopic assembly can be controlled to apply pressure to the pressure bearing plate, the pressure borne by the pressure bearing plate is the same as the pressure borne by the floating plate from compressed air, and therefore the compressed air can be stored and released in a constant-pressure mode, and the situation that the pressure in the air storage structure changes in a large range in the inflation and deflation process is avoided; therefore, variable-working-condition operation of core equipment is effectively avoided, the energy storage efficiency of the system is improved, safe and stable operation of the system is guaranteed, meanwhile, combined supply of cold energy, heat energy and electricity energy can be conducted in the energy storage and release process, and the comprehensive energy efficiency and the energy utilization rate of the system are greatly improved.