Air leakage detection device for piston ring of mechanical piston type compressor

Abstract

The utility model provides a gas leakage detection device for a piston ring of a mechanical piston type compressor, and belongs to the field of high-pressure hydrogen gas leakage collection and detection. The problem that after the piston ring leaks gas, the pressure change of the low-pressure side needs to be detected, and leaked gas needs to be collected is solved. The device comprises a storage cavity used for storing leaked hydrogen; the diaphragm divides the accommodating cavity into an expansion cavity and a balance cavity; and the leakage-proof indication assembly is arranged on the balance cavity, and when air leakage occurs, the diaphragm expands and pushes the leakage-proof indication assembly. The device is mainly used for leak detection and gas collection of the mechanical piston type hydrogen compressor.

Description

Technical Field

[0001] This utility model belongs to the field of high-pressure hydrogen gas leakage collection and detection, and in particular relates to a mechanical piston compressor piston ring leakage detection device. Background Technology

[0002] In hydrogen mechanical reciprocating compressors, excessive wear or breakage of the piston rings can cause compressed air to leak into the low-pressure area on the other side of the piston, or even into the air where it comes into contact with oxygen, which can easily cause a fire. Simply placing a pressure sensor to detect the leak means that the leaked gas is not easy to recover during maintenance. If it is not collected and treated, it will leak into the air and pose a fire risk.

[0003] In summary, a piston ring leakage detection device for mechanical piston compressors is proposed. Utility Model Content

[0004] In view of this, the present invention aims to propose a piston ring leakage detection device for a mechanical piston compressor, so as to solve the problem of needing to detect the pressure change on the low-pressure side and collect the leaked gas after piston ring leakage.

[0005] To achieve the above objectives, this utility model adopts the following technical solution to provide a mechanical reciprocating compressor piston ring leakage detection device, comprising:

[0006] A storage chamber for storing leaked hydrogen;

[0007] A diaphragm divides the receiving cavity into an expansion cavity and a balancing cavity;

[0008] An end cap is provided on the low-pressure side of the cylinder and is connected to the expansion chamber;

[0009] A leak-proof indicator assembly is located on the balance chamber. When a leak occurs, the diaphragm expands and pushes the leak-proof indicator assembly.

[0010] Furthermore, the storage cavity is composed of a housing one and a housing two, with a diaphragm between the housing one and the housing two.

[0011] Furthermore, the housing is provided with an air inlet pipe, which is connected to the sealing sleeve.

[0012] Furthermore, the air intake pipe is equipped with an exhaust pipe, which is used to discharge the gas collected inside the device.

[0013] Furthermore, the leak-proof indicator component is a push rod, which is slidably connected to the housing.

[0014] Furthermore, the push rod is provided with a through hole, which connects the cavity formed by the diaphragm and the housing to the atmosphere.

[0015] Furthermore, the push rod has a flat plate at one end inside the housing to increase the contact area with the diaphragm.

[0016] Furthermore, an expansion sleeve is connected to the outer side of the push rod, and the expansion sleeve is connected to the housing.

[0017] Furthermore, the push rod, the expansion sleeve, and the housing together form a cavity for sealing.

[0018] Furthermore, the end cap is provided with a sealing sleeve, which is used to form a seal with the sealing piston rod.

[0019] Beneficial effects: By setting a sealed end cap at the piston rod end of the cylinder and connecting the internal gas to an expansion chamber with a diaphragm, the diaphragm expands or contracts with the piston movement when the piston is working normally. When gas leaks, the air bladder will remain inflated and push up the indicator push rod to serve as a warning. At the same time, the compressed gas remains in the expansion chamber and cannot be discharged to the outside. An exhaust pipe is provided to connect to the inlet of other compressors so that the internal gas can be discharged during maintenance. Attached Figure Description

[0020] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0021] Figure 1 This is a cross-sectional view of the piston ring leakage detection device for a mechanical piston compressor described in this utility model;

[0022] Figure 2 This is a schematic diagram of the outer structure of the piston ring leakage detection device for a mechanical piston compressor described in this utility model;

[0023] Figure 3 This is a schematic diagram showing the connection between the piston ring leakage detection device for a mechanical piston compressor described in this utility model and the cylinder.

[0024] Figure 4 This is a schematic diagram showing the connection between the piston ring leakage detection device of the mechanical piston compressor described in this utility model and the end cover.

[0025] In the diagram: 1. Housing 1; 2. Housing 2; 3. Push rod; 4. Expansion sleeve; 5. Flat plate; 6. Diaphragm; 7. Through hole; 8. Inlet pipe; 9. Exhaust pipe; 10. End cover; 11. Piston rod; 12. Cylinder; 13. Compressor piston rod sealing sleeve. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.

[0027] It should be noted that the descriptions of "left," "right," "left side," "right side," "upper part," "lower part," "top," and "bottom" in this utility model are defined based on the orientation or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and are not intended to indicate or imply that the described structure must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0028] In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" 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 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 utility model based on the specific circumstances. Specific implementation method one:

[0030] Referring to the accompanying drawings, this embodiment provides a piston ring leakage detection device for a mechanical reciprocating compressor, comprising:

[0031] A storage chamber for storing leaked hydrogen;

[0032] The diaphragm 6 divides the receiving cavity into an expansion cavity and a balancing cavity;

[0033] End cap 10 is disposed on the low-pressure side of cylinder 12 and is connected to the expansion chamber;

[0034] A leak-proof indicator assembly is installed on the balance chamber. When a leak occurs, the diaphragm 6 expands and pushes the leak-proof indicator assembly.

[0035] When the piston rings of the compressor leak, gas enters the low-pressure side through the broken piston rings, causing the pressure on the low-pressure side of the piston to increase. Since hydrogen cannot leak into the air, it may cause a fire or even an explosion. After the gas enters the low-pressure side, it enters the expansion chamber of the receiving chamber, and the expansion chamber pushes the diaphragm 6 to expand. When the diaphragm 6 expands to a certain extent, it will push the leak prevention indicator component to move out of the receiving chamber.

[0036] In this embodiment, the storage cavity is composed of a housing 1 and a housing 2, and a diaphragm 6 is provided between the housing 1 and the housing 2.

[0037] The housing 1 and the diaphragm 6 form an expansion chamber, which is connected to the low-pressure side of the compressor. The housing 2 and the diaphragm 6 form a balance chamber, which is used to balance the pressure of the diaphragm 6 when the expansion chamber expands or contracts, so that air can enter or be discharged.

[0038] In this embodiment, the housing 1 is provided with an air inlet pipe 8, which is connected to the sealing sleeve 13.

[0039] The intake pipe 8 is connected to the low-pressure chamber of the compressor, forming a passage for gas flow.

[0040] In this embodiment, the air inlet pipe 8 is provided with an exhaust pipe 9, which is used to discharge the gas collected in the device.

[0041] The exhaust pipe 9 is installed on the intake pipe 8. The other side of the exhaust pipe 9 is connected to the gas compressor inlet or collection container. Under normal conditions, it is in a closed state. When a leak is found and the compressor body needs to be replaced or disassembled, it is opened to discharge the collected gas and the gas in the compressor together, reducing leakage into the air.

[0042] In this embodiment, the leak-proof indicator component is a push rod 3, which is slidably connected to the housing 2. When compressed gas leaks, the diaphragm 6 expands towards the balance chamber, eventually pushing up the push rod 3.

[0043] In this embodiment, the push rod 3 is provided with a through hole 7, which connects the cavity formed by the diaphragm 6 and the housing 2 to the atmosphere.

[0044] The through hole 7 serves to allow air to pass through. When the diaphragm 6 expands toward the balance chamber, it discharges the gas in the balance chamber. When the diaphragm 6 moves toward the expansion chamber, it draws in gas.

[0045] In this embodiment, the push rod 3 is provided with a flat plate 5 at one end inside the housing 2 to increase the contact area with the diaphragm 6.

[0046] The plate 5 can form a seal between the diaphragm 6 after it expands to contact the diaphragm 6, preventing the gas in the balance chamber from escaping outward, thus preventing partial damage or leakage of the diaphragm 6 that could lead to gas being discharged into the atmosphere through the through hole 7.

[0047] In this embodiment, an expansion sleeve 4 is connected to the outer side of the push rod 3, and the expansion sleeve 4 is connected to the housing 2.

[0048] The expansion sleeve 4 moves with the push rod 3, and its main function is to prevent gas from flowing out through the gap between the push rod 3 and the housing 2.

[0049] In this embodiment, the push rod 3, the expansion sleeve 4, and the housing 2 form a cavity for sealing. The cavity serves to seal, preventing gas from flowing out through the gap between the push rod 3 and the housing 2.

[0050] In this embodiment, the end cap 10 is provided with a sealing sleeve 13, which is used to form a seal with the sealing piston rod. This facilitates design and manufacturing.

[0051] Working principle:

[0052] Connect the intake pipe 8 to the compressor piston rod sealing sleeve 13;

[0053] Under normal operating conditions, the piston rings work normally, and there is also gas compression on the low-pressure side. When the piston moves toward the end cap 10 on the low-pressure side, it compresses the gas on the low-pressure side. The compressed gas enters the expansion chamber through the intake pipe 8. The expansion chamber expands under pressure, but the expansion is small at this time. The diaphragm 6 bulges to a small extent. As the piston moves back and forth, the diaphragm 6 expands back and forth. At this time, the exhaust pipe 9 is in a closed state.

[0054] In the case of piston leakage, the gas on the high-pressure side enters the low-pressure side through the gap between the cylinder 12 and the piston. At this time, the gas pressure on the low-pressure side increases, causing the diaphragm 6 to remain bulging with a large amplitude. As it continues to expand, it is restricted by the shell 2 to prevent further expansion, causing the diaphragm 6 to burst. The diaphragm 6 contacts the plate 5, blocking the through hole 7, isolating the balance chamber from the outside world, and preventing gas leakage through the through hole 7. The diaphragm 6 pushes the plate 5, the plate 5 pushes the push rod 3, and the push rod 3 moves the expansion sleeve 4 together, triggering a leak alarm. At this time, the leaked gas is concentrated in the expansion chamber and will not leak into the air. The exhaust pipe 9 is opened, and the gas in the expansion chamber is discharged using a container or other compressor to prevent waste or release into the air, which poses a risk of fire.

[0055] The embodiments of the present invention disclosed above are merely illustrative of the present invention. The embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. A device for detecting piston ring leakage in a mechanical piston compressor, characterized in that, include: A storage chamber for storing leaked hydrogen; The diaphragm (6) divides the receiving cavity into an expansion cavity and a balancing cavity; End cap (10) is disposed on the low-pressure side of cylinder (12) and is connected to the expansion chamber; A leak-proof indicator assembly is installed on the balance chamber. When a leak occurs, the diaphragm (6) expands and pushes the leak-proof indicator assembly.

2. The piston ring leakage detection device for a mechanical piston compressor according to claim 1, characterized in that: The storage cavity is composed of a first shell (1) and a second shell (2), and a diaphragm (6) is provided between the first shell (1) and the second shell (2).

3. The piston ring leakage detection device for a mechanical piston compressor according to claim 2, characterized in that: The housing (1) is provided with an air inlet pipe (8), which is connected to the sealing sleeve (13).

4. The piston ring leakage detection device for a mechanical piston compressor according to claim 3, characterized in that: The air inlet pipe (8) is provided with an exhaust pipe (9), which is used to discharge the gas collected in the device.

5. The piston ring leakage detection device for a mechanical piston compressor according to claim 2, characterized in that: The leak-proof indicator component is a push rod (3), which is slidably connected to the housing (2).

6. The piston ring leakage detection device for a mechanical piston compressor according to claim 5, characterized in that: The push rod (3) is provided with a through hole (7), which connects the chamber formed by the diaphragm (6) and the housing (2) to the atmosphere.

7. The piston ring leakage detection device for a mechanical piston compressor according to claim 5, characterized in that: The push rod (3) is provided with a flat plate (5) at one end inside the housing (2) to increase the contact area with the diaphragm (6).

8. The piston ring leakage detection device for a mechanical piston compressor according to claim 5, characterized in that: An expansion sleeve (4) is connected to the outside of the push rod (3), and the expansion sleeve (4) is connected to the housing (2).

9. A piston ring leakage detection device for a mechanical reciprocating compressor according to claim 8, characterized in that: The push rod (3), the expansion sleeve (4), and the housing (2) form a cavity for sealing.

10. The piston ring leakage detection device for a mechanical piston compressor according to claim 1, characterized in that: The end cap (10) is provided with a sealing sleeve (13), which forms a seal with the piston rod.

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