A piston device for adjusting the working pressure of a gas holder

Abstract

This application provides a piston device for adjusting the working pressure of a gas holder. The piston device is disposed within the gas holder body and includes: a piston truss; an operating platform, the operating platform being spaced apart from the center of the piston truss; and a counterweight storage assembly, the counterweight storage assembly including a counterweight box and counterweight fluid stored in the counterweight box, with multiple counterweight storage assemblies disposed on each operating platform. This invention, through the arrangement of the operating platform, counterweight storage assembly, and adjusting assembly, and by adjusting the weight of the counterweight fluid in the counterweight box through the adjusting assembly, achieves flexible adjustment of the working pressure of the gas holder. It eliminates the need for manual handling of heavy concrete counterweight blocks, significantly reducing the labor intensity of operators, while also reducing the manpower and material resources required for pressure adjustment and shortening the pressure adjustment cycle.

Description

Technical Field

[0001] This application belongs to the field of gas storage technology, specifically relating to a piston device that can adjust the working pressure of a gas holder. Background Technology

[0002] Gas holders are essential large-scale gas storage devices in the production and development of modern steel and metallurgical enterprises. Polygonal, thin-oil sealed gas holders play a crucial role throughout the entire lifecycle of a gas production line. They function as gas storage equipment, gas pipeline pressure stabilization devices, and energy-saving equipment for steel enterprises. With the rapid development of domestic steel enterprises, higher demands are being placed on environmental protection and energy conservation. Therefore, steel companies are continuously increasing production capacity while optimizing and adjusting their production structures to achieve energy conservation and emission reduction. During this process, gas holders may experience changes in the stored gas pressure or even a change in the type of gas stored, requiring adjustments to their operating pressure.

[0003] Currently, the working pressure of this type of gas holder is mainly adjusted by adding or removing concrete blocks as piston counterweights. However, the concrete blocks are heavy, the internal space of the gas holder is limited, and it is time-consuming and laborious to manually move and add or remove counterweights. Building a new gas holder that is adapted to the new working pressure requires a large investment of manpower, material resources and time, which seriously restricts the development of steel enterprises. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To address the aforementioned problems, this application provides a piston device for adjusting the working pressure of a gas holder. The piston device is disposed within the gas holder body and includes: Piston truss; An operating platform, which is evenly distributed on the piston truss with the center of the piston truss as the center; A counterweight storage component, comprising a counterweight box and counterweight liquid stored in the counterweight box, and multiple counterweight storage components are provided on each of the operating platforms; An adjustment component is used to adjust the weight of the counterweight liquid in the counterweight box in order to adjust the working pressure of the gas holder.

[0006] Optionally, the counterweight box includes: The box has a storage space inside, and the counterweight liquid is placed in the storage space; An adjustment port is provided on the housing.

[0007] Optionally, the counterweight box further includes: A scale line is provided on the housing along its height direction, and the scale line is located below the adjustment port; A level gauge is installed on the top of the tank.

[0008] Optionally, the adjustment component includes: A transport tanker truck, wherein the transport tanker truck is equipped with a transport tank, and the transport tank stores the counterweight liquid; A pump body, which is installed inside the transport tank of the transport tanker truck; A connecting pipe, the first end of which is connected to the pump body, and the second end of which is located in the storage space of the box through the adjustment port.

[0009] Optionally, the adjustment component further includes: A controller, which is electrically connected to the pump body and the level gauge.

[0010] Optionally, it also includes storage slots, with multiple storage slots disposed on the operating platform, and the counterweight box disposed within the storage slots.

[0011] Optionally, a buffer pad is provided between the storage slot and the counterweight box.

[0012] Optionally, an observation hole is provided on the storage slot at a position that matches the scale line.

[0013] Optionally, the counterweight box and the buffer pad are made of polytetrafluoroethylene.

[0014] Optionally, the counterweight liquid is composed of one or more of ultrapure water, ethylene glycol, color developer, and stabilizer.

[0015] Beneficial effects The piston device for adjusting the working pressure of a gas holder provided in the embodiments of the present invention, through the setting of an operating platform, a counterweight storage component and an adjustment component, adjusts the weight of the counterweight liquid in the counterweight box by adjusting the adjustment component, thereby realizing flexible adjustment of the working pressure of the gas holder. There is no need to manually carry heavy concrete counterweight blocks, which greatly reduces the labor intensity of operators, reduces the manpower and material resources required for pressure adjustment, and shortens the pressure adjustment cycle. Attached Figure Description

[0016] Figure 1 This is a diagram of the piston truss structure of the present invention; Figure 2 This is a front view structural diagram of the counterweight storage component of the present invention; Figure 3 This is a side view of the counterweight storage component of the present invention; Figure 4 This is a front view structural diagram of the storage slot of the present invention; Figure 5 This is a side view of the storage slot structure of the present invention; Figure 6 This is a front view of the counterweight storage component of the present invention installed in the storage tank; Figure 7 For the present invention Figure 6 Enlarged structural diagram of point A in the middle; Figure 8 This is a side view of the counterweight storage component of the present invention installed inside the storage tank.

[0017] The reference numerals in the attached figures are as follows: 1. Piston truss; 2. Operating platform; 3. Counterweight storage assembly; 31. Counterweight box; 311. Box body; 312. Adjustment port; 313. Scale line; 32. Counterweight fluid; 4. Storage tank; 5. Buffer pad; 6. Observation hole. Detailed Implementation

[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] Combined with appendix Figure 1-8 As shown, an embodiment of this application provides a piston device for adjusting the working pressure of a gas holder. The piston device is disposed within the gas holder body and includes: Piston Truss 1; Operating platform 2, which is evenly distributed on piston truss 1 with the center of piston truss 1 as the center; The counterweight storage component 3 includes a counterweight box 31 and a counterweight liquid 32 stored in the counterweight box 31. Each operating platform 2 is provided with multiple counterweight storage components 3. An adjustment component is used to adjust the weight of the counterweight liquid 32 in the counterweight box 31, so as to adjust the working pressure of the gas holder.

[0023] The piston device for adjusting the working pressure of a gas holder provided in this application embodiment includes a piston truss 1, an operating platform 2, a counterweight storage component 3, and an adjustment component. The counterweight storage component 3 consists of a counterweight box 31 and a counterweight liquid 32. The counterweight box 31 stores the counterweight liquid 32. Multiple counterweight storage components 3 are arranged on each operating platform 2. The operating platform 2 is evenly distributed on the piston truss 1 with the center as the center. The adjustment component is used to adjust the weight of the counterweight liquid 32 in the counterweight box 31, thereby realizing flexible adjustment of the working pressure of the gas holder. Compared with the traditional concrete counterweight method, the operation is simpler, more time-saving, and labor-saving.

[0024] Based on this, when the working pressure needs to be adjusted during the service life of the gas holder, after moving the piston device to the bottom of the gas holder, the counterweight fluid 32 in each counterweight box 31 is extracted or added through the adjustment component. By changing the overall weight of the counterweight storage component 3, the gas storage pressure in the gas holder is adjusted to adapt to different gas storage needs or gas type change scenarios. In this process, the operating platform 2 is set at intervals with the piston truss 1 as the center, which can provide a stable installation foundation for the counterweight storage component 3, and also facilitate the staff to inspect and maintain the adjustment status of the counterweight fluid 32 and the status of the counterweight box 31. There is no need to manually move heavy concrete counterweight blocks, which greatly reduces the labor intensity of the operators, reduces the manpower and material resources required for pressure adjustment, and shortens the pressure adjustment cycle.

[0025] It is understandable that the operating platform 2 is arranged evenly with the center of the piston truss 1 as the center, which can make the counterweight storage components 3 evenly distributed, ensure the force balance of the piston device, avoid the piston device from tilting or shifting during the lifting and lowering process, and ensure the stable operation of the gas holder.

[0026] Understandably, multiple counterweight storage components 3 are set on each operating platform 2, and the weight of the counterweight liquid 32 in one or more counterweight boxes 31 can be flexibly adjusted according to the adjustment requirements of the working pressure of the gas holder, so as to adapt to the use of gas holders of different sizes and pressure requirements.

[0027] In one feasible embodiment, the counterweight box 31 includes: The box 311 has a storage space inside, and the counterweight liquid 32 is disposed in the storage space; An adjustment port 312 is provided on the housing 311.

[0028] The counterweight box 31 also includes: A scale line 313 is provided on the housing 311 along its height direction, and the scale line 313 is located below the adjustment port 312; A level gauge is installed on the top of the housing 311.

[0029] In this technical solution, the counterweight box 31 includes a box body 311, an adjustment port 312, a scale line 313, and a level gauge. The box body 311 has a storage space inside for stably storing the counterweight liquid 32, providing a sealed storage environment for the counterweight liquid 32 and preventing leakage of the counterweight liquid 32 from affecting the operation of the piston device. The adjustment port 312 is set on the box body 311 and serves as a channel for the counterweight liquid 32 to enter and exit. It can be connected to the adjustment component to realize the extraction and filling of the counterweight liquid 32, providing an operating interface for adjusting the working pressure of the gas holder, and facilitating the extraction and filling of the counterweight liquid 32.

[0030] Based on this, when adjusting the working pressure of the gas holder by adjusting the weight of the counterweight liquid 32, the adjustment component can be connected to the storage space inside the tank 311 through the adjustment port 312 to complete the addition or extraction of the counterweight liquid 32. During this process, the scale line 313 is set along the height direction of the tank 311 and located below the adjustment port 312. The operator can intuitively and quickly observe the liquid level change of the counterweight liquid 32 in the tank 311 through the scale line 313 and make a preliminary judgment on the increase or decrease of the counterweight liquid 32. The liquid level gauge set on the top of the tank 311 can monitor the real-time liquid level of the counterweight liquid 32, complementing the scale line 313, further improving the accuracy of liquid level monitoring, avoiding the situation of over-addition or under-extraction of the counterweight liquid 32, ensuring that the weight adjustment of the counterweight liquid 32 is precise and controllable, and thus ensuring that the working pressure adjustment of the gas holder meets the requirements.

[0031] Understandably, the box 311 is made of semi-transparent plastic, so the liquid level of the counterweight liquid 32 inside the box 311 can be directly observed through the scale lines, making it convenient for staff to observe and use.

[0032] Understandably, by setting up the level gauge and scale line 313, staff can obtain level data through the level gauge and quickly determine the approximate range of the level through the scale line 313, reducing the number of steps required by staff and improving the accuracy and efficiency of adjusting the counterweight liquid 32.

[0033] In one feasible embodiment, the adjustment component includes: A transport tanker truck, wherein the transport tanker truck is equipped with a transport tank, and the transport tank stores the counterweight liquid 32; A pump body, which is installed inside the transport tank of the transport tanker truck; A connecting pipe, the first end of which is connected to the pump body, and the second end of which is disposed in the storage space of the housing 311 through the adjustment port 312.

[0034] The adjustment component further includes: A controller, which is electrically connected to the pump body and the level gauge.

[0035] In this technical solution, the adjustment components include a transport tanker, a pump body, a connecting pipe, and a controller. The transport tanker can store and transfer the counterweight liquid 32. The transport tank installed on it can store a sufficient amount of counterweight liquid 32 and can flexibly transfer the counterweight liquid 32 to the work site according to the pressure adjustment requirements of the gas holder. The pump body is set inside the transport tank and serves as the power source for transporting the counterweight liquid 32, providing power for the extraction and filling of the counterweight liquid 32. One end of the connecting pipe is connected to the pump body, and the other end can extend into the storage space of the box 311 through the adjustment port 312 of the counterweight box 31 to realize the transport of the counterweight liquid 32 between the transport tank and the box 311.

[0036] Based on this, when it is necessary to adjust the weight of the counterweight liquid 32 to adjust the working pressure of the gas holder, the transport tanker can be moved to the designated working location, and the second end of the connecting pipe can be connected to the inside of the housing 311 through the adjustment port 312. The operator can control the pump to start via the controller. When it is necessary to increase the counterweight liquid 32 and raise the working pressure of the gas holder, the pump will transport the counterweight liquid 32 from the transport tank to the storage space of the housing 311 through the connecting pipe; when it is necessary to decrease the counterweight liquid 32 and lower the working pressure of the gas holder, the pump will extract the counterweight liquid 32 from the housing 311 into the transport tank through the connecting pipe. Simultaneously, the controller is electrically connected to the level gauge on the top of the housing 311. The level gauge can transmit the real-time monitored level data of the counterweight liquid 32 to the controller. The controller automatically controls the start and stop of the pump according to the preset level standard, achieving precise control of the amount of counterweight liquid 32 added or extracted, without the need for continuous manual monitoring.

[0037] Understandably, the setup of the transport tanker, pump body, and connecting pipes enables convenient transfer and rapid delivery of the counterweight liquid 32. Compared to the traditional method of manually handling counterweights, this significantly improves the efficiency of counterweight adjustment, reduces the labor intensity of staff, and avoids errors caused by manual operation.

[0038] Understandably, the electrical connection between the controller, pump, and level gauge automates the adjustment of the counterweight liquid 32, reducing manual intervention and the probability of human error, while also ensuring the accuracy of the weight adjustment of the counterweight liquid 32. This, in turn, guarantees the stability and reliability of the working pressure adjustment of the gas holder, adapting to different operating requirements of the gas holder.

[0039] In one feasible embodiment, the system further includes storage slots 4, with multiple storage slots 4 disposed on the operating platform 2, and the counterweight box 31 disposed within the storage slots 4.

[0040] In this technical solution, in this embodiment, the counterweight box 31 corresponding to the adjustment component is equipped with a storage slot 4. Multiple storage slots 4 are arranged on the operating platform 2, and each storage slot 4 contains a corresponding counterweight box 31. The storage slot 4 serves as the mounting and supporting structure for the counterweight box 31, providing a stable placement space and ensuring the installation stability of the counterweight box 31 during piston device operation. The size of the storage slot 4 is adapted to the size of the counterweight box 31, precisely fitting the outer contour of the counterweight box 31 to achieve limited fixation of the counterweight box 31. This prevents displacement or tilting of the counterweight box 31 due to piston lifting and gas flow, thereby preventing leakage of the counterweight fluid 32 and ensuring the smooth operation of the counterweight adjustment.

[0041] Based on this, when assembling the counterweight boxes 31, each counterweight box 31 can be placed into a storage slot 4 pre-set on the operating platform 2. The limiting effect of the storage slot 4 ensures that the counterweight box 31 is stably fixed in the designated position on the operating platform 2. Furthermore, the even distribution of multiple storage slots 4 allows for the orderly arrangement of the counterweight boxes 31 on the operating platform 2, ensuring uniform force distribution across the counterweight storage assembly 3 and preventing piston force imbalance due to uneven distribution of the counterweight boxes 31, which could affect the stability of the gas holder operation. Simultaneously, the storage slot 4 forms a wrapping limiting effect on the counterweight boxes 31, effectively buffering the vibrations generated during piston operation and reducing the impact of vibrations on the counterweight boxes 31 and the counterweight fluid 32, thus lowering the risk of damage to the counterweight boxes 31 and spillage of the counterweight fluid 32.

[0042] Understandably, multiple storage tanks 4 correspond to multiple counterweight boxes 31 and are evenly distributed on the operating platform 2. This facilitates the standardized installation and subsequent inspection and maintenance of the counterweight boxes 31, and also ensures that the distribution of the counterweight boxes 31 is compatible with the stress requirements of the operating platform 2 and the piston truss 1, further improving the overall stability of the piston device and providing a basic guarantee for the precise adjustment of the counterweight liquid 32 and the stable adjustment of the working pressure of the gas holder.

[0043] It is understandable that the setting of storage slot 4 does not require changing the original structure of operating platform 2. It is only necessary to pre-set a suitable slot on operating platform 2 corresponding to the placement position of counterweight box 31. The structure is simple, the assembly is convenient, and it can effectively improve the installation reliability of counterweight box 31, avoid a series of operational hazards caused by the displacement of counterweight box 31, and meet the needs of long-term stable operation of gas holder.

[0044] In one feasible embodiment, a buffer pad 5 is provided between the storage slot 4 and the counterweight box 31.

[0045] An observation hole 6 is provided on the storage slot 4 at a position that matches the scale line 313.

[0046] The counterweight box 31 and the buffer pad 5 are made of polytetrafluoroethylene.

[0047] In one feasible embodiment, a buffer pad 5 is provided between the storage tank 4 and the counterweight box 31. An observation hole 6 is provided on the storage tank 4 at the position corresponding to the scale line 313 of the counterweight box 31. Both the counterweight box 31 and the buffer pad 5 are made of polytetrafluoroethylene (PTFE). During the process of installing the counterweight box 31 into the storage tank 4, the buffer pad 5 can fit against the outer side of the counterweight box 31 and the inner wall of the storage tank 4. When the piston device vibrates during operation, the buffer pad 5 can effectively absorb the vibration impact, reducing friction and collision between the storage tank 4 and the counterweight box 31, preventing damage to both due to vibration. It also further limits the shaking of the counterweight box 31, preventing leakage of the counterweight fluid 32. When adjusting the counterweight fluid 32 or conducting inspections, operators do not need to remove the counterweight box 31. They can clearly view the liquid level corresponding to the scale line 313 on the counterweight box 31 through the observation hole 6 on the storage tank 4, achieving dual monitoring in conjunction with a level gauge and improving operational convenience. In addition, the counterweight box 31 and the buffer pad 5 are made of polytetrafluoroethylene, which has the characteristics of corrosion resistance, wear resistance and good sealing performance. It can adapt to the complex environment inside the gas holder, avoid the counterweight box 31 from being corroded and the buffer pad 5 from aging and breaking, and extend the service life of the components.

[0048] In one feasible embodiment, the counterweight liquid 32 is composed of one or more of ultrapure water, ethylene glycol, color developer, and stabilizer.

[0049] In this technical solution, the counterweight liquid 32 is composed of one or more of ultrapure water, ethylene glycol, color developer and stabilizer, and the staff can configure the counterweight liquid 32 according to the usage requirements.

[0050] Example 1 This implementation targets a 200,000 m³ polygonal thin oil sealed gas holder. When the gas holder's operating pressure is low, the structural weight of the piston device itself is sufficient to meet the stable operation requirements of the gas holder. In this case, there is no need to add counterweight fluid 32 to the counterweight box 31, and the piston device can be put into direct use. If production demands change and the gas holder's working pressure needs to be increased, the gas stored in the gas holder must first be completely emptied to ensure the gas holder is at atmospheric pressure. Then, the piston device is controlled to fall to the bottom of the gas holder and fixed to prevent accidental piston rise or fall during operation. After completing safety preparations, the counterweight fluid 32 is transported to the work site by a tanker truck. The second end of the connecting pipe on the tanker truck is inserted into the storage space of the box 311 through the adjustment port 312. The pump is started, and the counterweight fluid 32 is evenly added to each counterweight box 31 according to the preset liquid level standard. In this embodiment, the operating platform 2 is equipped with 1128 storage slots 4, each containing a counterweight box 31. A polytetrafluoroethylene (PTFE) buffer pad 5 is placed between the storage slot 4 and the counterweight box 31. Observation holes 6 are provided on the storage slot 4 at the positions corresponding to the scale lines 313 of the counterweight box 31, facilitating real-time monitoring of the filling progress. Through the above operations, the working pressure of the gas holder can be precisely adjusted within the range of 0 kPa to 5 kPa, meeting the gas storage pressure requirements under different production scenarios. The entire filling process does not require manual handling of the counterweight, effectively improving efficiency and operational safety compared to traditional methods.

[0051] Example 2 Based on Example 1, the composition ratio of the counterweight liquid 32 was adjusted in a targeted manner to take into account the climate differences in different regions, so as to ensure that the counterweight liquid 32 can maintain a stable state under different ambient temperatures, avoid problems such as freezing and excessive evaporation, and ensure the normal operation of the piston device. The counterweight fluid 32 is mainly composed of ultrapure water, ethylene glycol, a color developer, and a stabilizer. The ratio of ultrapure water to ethylene glycol can be flexibly adjusted according to climatic conditions. In tropical southern regions where the lowest temperature is around 0℃, no additional antifreeze enhancement is needed, and the ratio of ultrapure water to ethylene glycol in the counterweight fluid is 1:1. In regions with distinct four seasons and winter temperatures reaching -10℃, the antifreeze capability of the counterweight fluid needs to be improved, and the ratio of ultrapure water to ethylene glycol is adjusted to 2:3 to ensure that the counterweight fluid does not freeze and maintains good fluidity in winter. In frigid northern regions where winter temperatures drop below -20℃, the antifreeze effect needs to be further enhanced, and the ratio of ultrapure water to ethylene glycol is adjusted to 3:7 to lower the freezing point of the counterweight fluid, prevent solidification at low temperatures, and ensure normal adjustment of the counterweight weight. The addition of stabilizers can significantly slow down the chemical reaction rate between the multiple components in the counterweight fluid, effectively extending the service life of the counterweight fluid, avoiding frequent replacements, and improving economic efficiency. In addition, 0.5% colorimetric reagent is added to the counterweight fluid used in all regions, which makes it easy for staff to quickly identify the liquid level of the counterweight fluid through the observation hole 6 and the scale line 313. At the same time, it can detect counterweight fluid leakage problems in a timely manner. The colorimetric reagent is an environmentally friendly reagent that is not volatile and non-corrosive, and does not affect the performance of the counterweight fluid or the safety of gas storage.

[0052] Example 3 When the production load of the gas holder decreases and the operating pressure needs to be reduced, the gas in the gas holder is first gradually emptied. The piston device is then slowly lowered to the bottom of the gas holder and locked to ensure a safe working environment. Subsequently, the pump on the transport tanker is started, and the connecting pipe is connected to the adjustment port 312 of the counterweight box 31. The counterweight liquid 32 in the counterweight box 31 is drawn out by the pump. During the drawing process, the staff checks the scale line 313 through the observation hole 6 of the storage tank 4, and at the same time, combines the data of the liquid level gauge on the top of the box 311 to accurately control the amount of liquid drawn, so as to avoid excessive drawing that would result in insufficient piston weight and affect the operational stability of the gas holder. Because the counterweight fluid 32 contains components such as ethylene glycol that are not easily degraded, direct discharge into the sewer system would cause water pollution. Therefore, the extracted counterweight fluid 32 must be collected by transport tanker trucks and stored separately in a sealed container for later use. If the gas holder needs to increase pressure later, the stored counterweight fluid 32 can be added back into the counterweight tank 31 for reuse, reducing operating costs. Waste counterweight fluid that can no longer be used must be disposed of in a harmless manner. In addition, after the extraction operation is completed, the regulating port 312 of the counterweight tank 31 must be closed, and the regulating port 312 and the connecting pipe interface must be checked for sealing to prevent gas leakage.

[0053] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A piston device for adjusting the working pressure of a gas holder, said piston device being disposed within the gas holder body, characterized in that, The piston assembly includes: Piston truss (1); Operating platform (2), the operating platform (2) is evenly arranged on the piston truss (1) with the center of the piston truss (1) as the center; The counterweight storage component (3) includes a counterweight box (31) and a counterweight liquid (32) stored in the counterweight box (31). Each operating platform (2) is provided with multiple counterweight storage components (3). An adjustment component is used to adjust the weight of the counterweight liquid (32) in the counterweight box (31) so as to adjust the working pressure of the gas holder.

2. The piston device for adjusting the working pressure of a gas holder according to claim 1, characterized in that, The counterweight box (31) includes: The box (311) has a storage space inside, and the counterweight liquid (32) is placed in the storage space; An adjustment port (312) is provided on the housing (311).

3. The piston device for adjusting the working pressure of a gas holder according to claim 2, characterized in that, The counterweight box (31) also includes: A scale line (313) is provided on the housing (311) along its height direction, and the scale line (313) is located below the adjustment port (312); A level gauge is provided on the top of the housing (311).

4. The piston device for adjusting the working pressure of a gas holder according to claim 3, characterized in that, The adjustment component includes: A transport tanker truck, wherein a transport tank is provided on the transport tanker truck and the transport tank contains the counterweight liquid (32); A pump body, which is installed inside the transport tank of the transport tanker truck; A connecting pipe, the first end of which is connected to the pump body, and the second end of which is located in the storage space of the housing (311) through the adjustment port (312).

5. The piston device for adjusting the working pressure of a gas holder according to claim 4, characterized in that, The adjustment component further includes: A controller, which is electrically connected to the pump body and the level gauge.

6. The piston device for adjusting the working pressure of a gas holder according to claim 5, characterized in that, It also includes storage slots (4), a plurality of the storage slots (4) are disposed on the operating platform (2), and the counterweight box (31) is disposed in the storage slots (4).

7. The piston device for adjusting the working pressure of a gas holder according to claim 6, characterized in that, A buffer pad (5) is provided between the storage tank (4) and the counterweight box (31).

8. The piston device for adjusting the working pressure of a gas holder according to claim 7, characterized in that, An observation hole (6) is provided on the storage slot (4) at a position that matches the scale line (313).

9. The piston device for adjusting the working pressure of a gas holder according to claim 8, characterized in that, The counterweight box (31) and the buffer pad (5) are made of polytetrafluoroethylene.

10. The piston device for adjusting the working pressure of a gas holder according to claim 1, characterized in that, The counterweight liquid (32) is composed of one or more of ultrapure water, ethylene glycol, color developer and stabilizer.

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