Gas chamber
By installing a nitrogen assembly in the gas holder to dilute the leaking gas at the piston seal failure point, the problem of easy combustion and explosion of the gas holder is solved, and safety and stability are improved.
Patent Information
- Application Number
- CN202520511754.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-03-21
AI Technical Summary
Gas holders are prone to gas leakage due to piston seal failure, which can lead to explosive gas mixtures and combustion/explosion accidents, resulting in low safety during use.
A nitrogen assembly is installed in the gas holder to dilute the leaking gas at the piston seal failure point through nitrogen pipes and outlets, thereby reducing the risk of forming an explosive gas mixture.
It improves the safety of gas holders, reduces the risk of combustion and explosion accidents, and enhances the stability and safety of the system.
Smart Images
Figure CN223740556U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of gas holder technology, and more particularly to a gas holder. Background Technology
[0002] Currently, gas holders are steel or polyester membrane containers used for storing industrial and domestic coal gas. They are widely used in petrochemical, coal chemical, and metallurgical enterprises, as well as ordinary gas stations. As a variable-volume container, its main function is to collect and store coal gas for user use and to balance and stabilize pipeline pressure, maintaining system stability and equilibrium. However, due to factors such as exceeding their service life, improper operation, equipment failure, and natural disasters, they are prone to accidents such as gas poisoning, leaks, fires, and explosions. The most serious accidents in recent years have been explosions. Because the upper part of the gas holder piston is open to the atmosphere, it is a confined space where air circulation is difficult. When the piston's sealing measures fail or operational malfunctions occur (such as piston tipping or excessive drift), a large amount of coal gas leaks to the upper part of the piston, forming an explosive mixture with air. If this mixture encounters an ignition source, it can easily lead to a gas combustion and explosion, resulting in low safety during use. Utility Model Content
[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a gas holder that can use nitrogen to dilute leaked gas at the piston's seal failure point, thereby reducing the risk of an explosive gas mixture forming in the space above the piston of the gas holder and causing a gas combustion and explosion accident, and improving the safety of the gas holder in use.
[0004] A gas holder according to an embodiment of this application includes: a gas holder having a piston chamber with an open end; a piston that slides within the piston chamber and is sealed to the inner wall of the piston chamber; and a nitrogen assembly including a nitrogen pipe and a shut-off valve. The nitrogen pipe is adapted to allow nitrogen to pass through and has an inlet and an outlet. The inlet is located outside the gas holder, and the outlet is located on the side of the piston near the open end. The shut-off valve is disposed between the inlet and the outlet. The outlet is open toward the connection between the piston and the inner wall of the piston chamber.
[0005] According to the embodiments of this application, the gas holder is equipped with a nitrogen assembly, which allows nitrogen to enter the nitrogen pipe through the inlet and be sprayed out from the outlet toward the connection between the piston and the inner wall of the piston chamber. This uses nitrogen to dilute the gas leaking from the piston's sealing failure point, reducing the risk of an explosive mixture forming in the space above the piston of the gas holder and causing a gas combustion and explosion accident, thus improving the safety of the gas holder.
[0006] According to some embodiments of this application, the gas holder has multiple gas outlets, which are spaced apart circumferentially on the nitrogen pipe.
[0007] According to some embodiments of this application, in a gas holder, at least two of the gas outlets are centrally symmetrical with respect to the nitrogen pipe.
[0008] According to some embodiments of the present application, the gas holder includes an inlet pipe and an outlet pipe. The inlet is disposed on the inlet pipe, and there are multiple outlet pipes. All of the multiple outlet pipes are connected to the inlet pipe, and the end of each outlet pipe opposite to the inlet pipe is formed as the outlet.
[0009] According to some embodiments of the present application, the gas holder, the nitrogen assembly further includes: a nitrogen reservoir, the nitrogen reservoir being connected between the inlet pipe and the outlet pipe.
[0010] According to some embodiments of the present application, in a gas holder, the shut-off valve is located on the outside of the gas holder and close to the gas inlet.
[0011] According to some embodiments of the present application, the gas holder is further provided with a blind flange port, which is located on the side of the shut-off valve near the gas inlet.
[0012] According to some embodiments of this application, the gas holder further includes: a vent cap, the vent cap being disposed at the open opening, and the nitrogen pipe passing through the vent cap's air hole.
[0013] According to some embodiments of this application, the gas holder further includes: a carbon monoxide alarm, wherein the carbon monoxide alarm is disposed on the side of the piston near the open opening and opposite to the gas outlet; wherein the carbon monoxide alarm is used to obtain the carbon monoxide content and to sound an alarm when the carbon monoxide content exceeds a preset threshold.
[0014] According to some embodiments of the present application, the gas holder is configured as an electric quick-cut valve, and the carbon monoxide alarm is communicatively connected to the electric quick-cut valve.
[0015] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0016] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0017] Figure 1 This is a schematic diagram of a gas holder according to some embodiments of this application.
[0018] Figure label:
[0019] Gas holder 100;
[0020] Gas holder 10; piston chamber 11; open port 12; piston 13;
[0021] Nitrogen assembly 20; nitrogen pipe 21; inlet pipe 211; inlet port 2111; outlet pipe 212; outlet port 2121; blind flange port 213; shut-off valve 22; nitrogen tank 23; manual valve 24; vent cap 30; carbon monoxide alarm 40. Detailed Implementation
[0022] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.
[0023] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.
[0024] Currently, gas holders are steel or polyester membrane containers used for storing industrial and domestic coal gas. They are widely used in petrochemical, coal chemical, and metallurgical enterprises, as well as ordinary gas stations. As a variable-volume container, its main function is to collect and store coal gas for user use and to balance and stabilize pipeline pressure, maintaining system stability and equilibrium. However, due to factors such as exceeding their service life, improper operation, equipment failure, and natural disasters, they are prone to accidents such as gas poisoning, leaks, fires, and explosions. The most serious accidents in recent years have been explosions. Because the upper part of the gas holder piston is open to the atmosphere, it is a confined space where air circulation is difficult. When the piston's sealing measures fail or operational malfunctions occur (such as piston tipping or excessive drift), a large amount of coal gas leaks to the upper part of the piston, forming an explosive mixture with air. If this mixture encounters an ignition source, it can easily lead to a gas combustion and explosion, resulting in low safety during use.
[0025] In response, this application proposes a gas holder.
[0026] Please refer to the following. Figure 1 This application describes a gas holder 100 according to an embodiment of the present application.
[0027] like Figure 1 As shown, the gas holder 100 in this embodiment of the application includes: a gas holder 10, a piston 13, and a nitrogen assembly 20.
[0028] A piston chamber 11 with an open end 12 is formed inside the gas holder 10. The piston 13 slides and is sealed to the inner wall of the piston chamber 11. This allows the bottom wall of the piston 13 to define a gas storage chamber, thereby enabling the gas holder 100 to collect and store gas. Since the piston 13 slides and is sealed to the inner wall of the piston chamber 11, the volume of the piston chamber 11 can be changed by the movement of the piston 13 to provide for user use and to balance and stabilize the pressure of the pipeline network, thus maintaining the stability and balance of the system.
[0029] The nitrogen assembly 20 includes a nitrogen pipe 21 and a shut-off valve 22. The nitrogen pipe 21 is adapted to be filled with nitrogen and has an inlet 2111 and an outlet 2121. The inlet 2111 is located outside the gas holder 10, and the outlet 2121 is located on the side of the piston 13 near the open port 12. The shut-off valve 22 is disposed between the inlet 2111 and the outlet 2121. The outlet 2121 is open toward the connection between the piston 13 and the inner wall of the piston chamber 11.
[0030] In this way, when the seal between piston 13 and the inner wall of piston chamber 11 fails, nitrogen can enter nitrogen pipe 21 through inlet 2111 and then be sprayed out through outlet 2121 of nitrogen pipe 21 toward the connection between piston 13 and the inner wall of piston chamber 11. This uses nitrogen to dilute the gas leaking from the seal failure point of piston 13, reducing the risk of an explosive mixture forming in the space above piston 13 of gas holder 100 and causing a gas combustion and explosion accident, thus improving the safety of gas holder 100.
[0031] A shut-off valve 22 is provided between the air inlet 2111 and the air outlet 2121. This shut-off valve 22 can be used to cut off the supply of nitrogen between the air inlet 2111 and the air outlet 2121, thereby facilitating the control of nitrogen output. The shut-off valve 22 can be an electric quick-cut valve or a manual valve 24, which is not limited here.
[0032] According to the embodiments of this application, the gas holder 100 is equipped with a nitrogen assembly 20, which allows nitrogen to enter the nitrogen pipe 21 through the inlet 2111 and be sprayed out from the outlet 2121 toward the connection between the piston 13 and the inner wall of the piston chamber 11. This uses nitrogen to dilute the gas leaking from the seal failure point of the piston 13, reducing the risk of an explosive mixture forming in the space above the piston 13 of the gas holder 100 and causing a gas combustion and explosion accident, thereby improving the safety of the gas holder 100.
[0033] In some embodiments, the portion of the nitrogen pipe 21 located inside the piston chamber 11 is a non-flammable, high-pressure resistant hose. This prevents the nitrogen pipe 21 from colliding with and damaging the piston 13 when it floats up and down, thus effectively ensuring the normal delivery of nitrogen.
[0034] In some embodiments, such as Figure 1 As shown, there are multiple air outlets 2121, which are spaced apart in the circumferential direction of the nitrogen pipe 21.
[0035] Therefore, by setting multiple gas outlets 2121, nitrogen gas is sprayed at multiple positions in the circumferential direction of the nitrogen pipe 21 towards the connection between the piston 13 and the inner wall of the piston chamber 11, thereby enhancing the dilution effect of nitrogen gas on the gas leaking from the sealing failure point of the piston 13, further reducing the risk of gas combustion and explosion accidents caused by the formation of an explosive gas mixture in the space above the piston 13 of the gas holder 100, and improving the safety of the gas holder 100.
[0036] In some embodiments, such as Figure 1 As shown, at least two gas outlets 2121 are centrally symmetrical with respect to nitrogen pipe 21.
[0037] This allows at least two gas outlets 2121 on both sides of the nitrogen pipe 21 in the diameter direction to spray towards the connection between the piston 13 and the inner wall of the piston chamber 11, thereby making the nitrogen gas output more uniform and enhancing the effect of nitrogen gas in diluting the gas leaking from the seal failure point of the piston 13.
[0038] In some embodiments, such as Figure 1 As shown, the nitrogen pipe 21 includes an inlet pipe 211 and an outlet pipe 212. The inlet port 2111 is provided in the inlet pipe 211, and there are multiple outlet pipes 212. All outlet pipes 212 are connected to the inlet pipe 211, and the end of each outlet pipe 212 facing away from the inlet pipe 211 is formed as an outlet port 2121.
[0039] This makes it easier to reduce the difficulty of setting the air outlet 2121. Since the air outlet 2121 is set on the air outlet pipe 212, it is easy to adjust the opening direction of the air outlet 2121, and thus it is easy to adjust the orientation of the air outlet 2121 according to the needs.
[0040] In some embodiments, such as Figure 1 As shown, the nitrogen assembly 20 also includes a nitrogen reservoir 23, which is connected between the inlet pipe 211 and the outlet pipe 212. This makes the gas flow rate of the multiple outlet pipes 212 more uniform, thereby ensuring that each outlet pipe 212 has a sufficient gas supply.
[0041] For example Figure 1 As shown, the nitrogen tank 23 can be set at the top center of the piston 13, and there can be 4 outlet pipes 212. The 4 outlet pipes 212 are evenly laid around the piston 13 in the circumference of the inlet pipe 211. In this way, the 4 outlet pipes 212 can distribute gas evenly according to the gas flow rate, ensuring that each outlet pipe 212 has a sufficient gas source.
[0042] In some embodiments, such as Figure 1 As shown, the shut-off valve 22 is located on the outside of the gas holder 10 and near the air inlet 2111.
[0043] This makes it easier to reduce the difficulty of setting up the shut-off valve 22, and facilitates the shut-off of nitrogen at a position near the inlet 2111 on the nitrogen pipe 21, thereby achieving rapid shut-off of nitrogen.
[0044] In some embodiments, such as Figure 1 As shown, the nitrogen pipe 21 is also provided with a blind flange port 213, which is located on the side of the shut-off valve 22 near the air inlet 2111.
[0045] Understandably, the blind flange opening 213 is used to lock the blind flange. In this way, when the gas holder 10 is entered for maintenance, the blind flange can be locked at the blind flange opening 213 to ensure that the nitrogen pipe 21 stops supplying nitrogen, thereby ensuring the safety of the environment inside the gas holder 10.
[0046] In some embodiments, such as Figure 1 As shown, the gas holder 100 also includes: a vent cap 30, which is located at the open opening 12, and a nitrogen pipe 21 passes through the vent of the vent cap 30.
[0047] Therefore, by setting up the vent cap 30, rainwater or other debris can be blocked from entering the gas holder 10. The nitrogen pipe 21 passes through the air hole of the vent cap 30, so that its structure is more compact and can play a certain role in fixing the nitrogen pipe 21, thereby enhancing the structural stability of the nitrogen pipe 21.
[0048] In some embodiments, the nitrogen assembly 20 further includes a manual valve 24, which is disposed at the air inlet 2111 to facilitate manual shut-off.
[0049] In some embodiments, such as Figure 1 As shown, the gas holder 100 also includes a carbon monoxide alarm 40, which is disposed on the side of the piston 13 near the open port 12 and opposite to the gas outlet 2121; wherein, the carbon monoxide alarm 40 is used to obtain the carbon monoxide content and to sound an alarm when the carbon monoxide content exceeds a preset threshold.
[0050] It is understandable that the main component of coal gas is carbon monoxide. Therefore, a carbon monoxide alarm 40 can be used to detect the carbon monoxide content and thus reflect the coal gas content. This makes it easy to use the carbon monoxide alarm 40 to detect whether there is a coal gas leak. When the carbon monoxide content exceeds a preset threshold, the carbon monoxide alarm 40 will sound an alarm to remind staff that there is a coal gas leak.
[0051] The preset threshold is a value of carbon monoxide content that is set manually, such as 23 ppm-25 ppm. This ensures that an alarm can be triggered even when the gas leak is minimal.
[0052] In some embodiments, the shut-off valve 22 is configured as an electrically operated quick-cut valve, and the carbon monoxide alarm 40 is communicatively connected to the electrically operated quick-cut valve.
[0053] It is understandable that, since the carbon monoxide alarm 40 is connected to the electric quick-cut valve, the carbon monoxide alarm 40 and the electric quick-cut valve can form a safety interlock function design. For example, when the detected carbon monoxide content is greater than or equal to 24 ppm, the carbon monoxide alarm 40 will sound an alarm and control the electric quick-cut valve to open. When the carbon monoxide content is less than 24 ppm, the carbon monoxide alarm 40 will stop sounding the alarm and control the electric quick-cut valve to close.
[0054] In this way, by forming a safety interlock function between the carbon monoxide alarm 40 and the electric quick-cut valve, the risk of gas combustion and explosion accidents caused by the formation of an explosive mixture in the upper space of the gas holder 100 piston 13 can be eliminated to a greater extent. This effectively solves the bottleneck problem of gas leakage through the piston 13 that restricts the safe development of enterprise production.
[0055] In some embodiments, the gas holder 100 may be equipped with a control system, which may be a remote PLC control system. The carbon monoxide alarm 40 and the electric quick-cut valve are connected through the remote PLC control system. In this way, the electric quick-cut valve can be automatically opened and closed through the remote PLC control system.
[0056] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0057] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
[0058] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.
[0059] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.
Claims
1. A gasholder (100) characterized in that, The utility model relates to a kind of nitrogen gas cabinet, including: Gas cabinet (10), piston cavity (11) with open mouth (12) in one end is formed in the gas cabinet (10); Piston (13), the inner wall of the piston cavity (11) is sealed with the sliding fit of the piston (13) and the piston cavity (11); Nitrogen gas assembly (20), nitrogen gas pipe (21) and stop valve (22) are included in the nitrogen gas pipe (21) suitable for nitrogen gas and with gas inlet (2111) and gas outlet (2121), the gas inlet (2111) is located at the outside of the gas cabinet (10), the gas outlet (2121) is located at the side of the piston (13) close to the open mouth (12), the stop valve (22) is arranged between the gas inlet (2111) and gas outlet (2121); Wherein, the gas outlet (2121) is opened towards the junction of the piston (13) and the inner wall of the piston cavity (11).
2. The gasholder (100) according to claim 1, characterized in that The gas outlet (2121) is provided with multiple, and multiple gas outlets (2121) are arranged at intervals in the circumferential direction of the nitrogen gas pipe (21).
3. The gasholder (100) according to claim 2, characterized in that At least two gas outlets (2121) are centrosymmetric relative to the nitrogen gas pipe (21).
4. The gasholder (100) according to claim 2, characterized in that The nitrogen gas pipe (21) includes gas inlet pipe (211) and gas outlet pipe (212), the gas inlet (2111) is arranged in the gas inlet pipe (211), and the gas outlet pipe (212) is provided with multiple, multiple gas outlet pipes (212) are communicated with the gas inlet pipe (211), and the end of each gas outlet pipe (212) away from the gas inlet pipe (211) is formed into the gas outlet (2121).
5. The gasholder (100) according to claim 4, characterized in that The nitrogen gas assembly (20) further includes: nitrogen gas bag (23), which is communicated between the gas inlet pipe (211) and the gas outlet pipe (212).
6. The gasholder (100) according to claim 1, characterized in that The stop valve (22) is located outside the gas cabinet (10) and is arranged close to the gas inlet (2111).
7. The gasholder (100) according to claim 1, characterized in that The nitrogen gas pipe (21) is also provided with blind plate opening (213), which is located at the side of the stop valve (22) close to the gas inlet (2111).
8. The gasholder (100) according to claim 1, characterized in that Further including: Doughnut (30), the doughnut (30) is arranged in the open mouth (12), and the nitrogen gas pipe (21) is arranged in the air hole of the doughnut (30).
9. The gasholder (100) according to any one of claims 1-8, characterized in that, Further including: Carbon monoxide alarm (40), the carbon monoxide alarm (40) is arranged at the side of the piston (13) close to the open mouth (12) and is arranged opposite to the gas outlet (2121); Wherein, the carbon monoxide alarm (40) is used to obtain carbon monoxide content, and alarm when the carbon monoxide content exceeds preset threshold.
10. The gasholder (100) according to claim 9, characterized in that The stop valve (22) is configured as an electric quick cut valve, and the carbon monoxide alarm (40) is communicatively connected with the electric quick cut valve.