Reciprocating compressor stuffing box device with leaked gas recovery function
By designing a reciprocating compressor packing device with leaky recovery function, the problem of leaked gases in the prior art cannot be recycled and utilized, the gas recovery and utilization is realized, the cost and environmental pollution are reduced, and the service life of the equipment is extended.
Patent Information
- Application Number
- CN202421795590.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The prior art cannot effectively recover and utilize the gas leaked from the filler device of the reciprocating compressor, resulting in waste of resources and safety hazards.
A reciprocating compressor packing box device with air leakage recovery is designed. By setting a leak chamber in the air leakage pressure cap and connecting it to the gas collection tank through a gas recovery pipeline, gas recovery and utilization are achieved using solenoid valves and check valves.
The recycling and utilization of leaked gases is realized, production costs are reduced, and the problems of gas pollution to the environment and safety hazards are solved. At the same time, the use cycle of the filler box is extended, ensuring the safe and stable operation of the device for a long period of time.
Smart Images
Figure CN223004113U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of reciprocating compressor packing boxes, and particularly relates to a reciprocating compressor packing box device with air leakage recovery. Background Art
[0002] Reciprocating compressors are widely used in industries such as chemical engineering, petroleum, and gas. When a reciprocating compressor is working, the main shaft drives the connecting rod to move. The connecting rod is connected to the piston rod through a crosshead, converting the reciprocating motion of the main shaft into the reciprocating linear motion of the piston. The piston movement causes the volume inside the cylinder to continuously change. When the cylinder volume becomes larger, the intake valve opens to allow gas to enter the cylinder. When the cylinder volume is compressed, the gas inside the cylinder is discharged out of the cylinder through the exhaust valve. During operation, a packing device is usually used to seal the gas leaking along the piston rod from the cylinder. After long-term use, as the sealing ring wears, the packing leakage is too large, which not only causes waste of the medium but also poses certain safety hazards.
[0003] In the existing technology, in order to prevent pollution and safety problems caused by leakage, the leaked gas is introduced into the flare line through a vent pipe. However, the above-mentioned scheme cannot further recycle the leaked gas, resulting in a large waste of resources. Summary of the Utility Model
[0004] In order to solve the deficiencies of the existing technology and timely recycle and efficiently utilize the gas leaked from the packing device, the utility model provides a reciprocating compressor packing box device with air leakage recovery.
[0005] To achieve the above purpose, the technical solution of the utility model is: a reciprocating compressor packing box device with air leakage recovery, including a packing box cylinder body. The right side of the packing box cylinder body is hermetically connected with a packing box gland. A tooth-shaped seal is arranged on the left side inside the packing box cylinder body. A plurality of adjacent packing box gland covers are arranged inside the packing box cylinder body. Sealing cavities are arranged at the center position on the right side of the packing box gland cover and on the right side of the tooth-shaped seal. A combined sealing ring is arranged inside the sealing cavity. A leakage gland is arranged on the right side of the rightmost packing box gland cover. An air leakage cavity is arranged inside the leakage gland. One side of the air leakage cavity is connected with a gas collecting tank through a gas recovery pipeline. A sealing gland is arranged on the right side of the leakage gland. A leakage gland cavity is arranged between the leakage gland and the sealing gland. A pressure sensor is arranged inside the leakage gland cavity. A nitrogen sealing cavity is arranged between the sealing gland and the packing box gland. A nitrogen pipeline connected to nitrogen is arranged on the nitrogen sealing cavity.
[0006] Further, an end face sealing ring is arranged on the left end face of the packing box cylinder body.
[0007] Further, a gland sealing ring is arranged between the packing box cylinder body and the packing box gland.
[0008] Further, the toothed seal is made of polytetrafluoroethylene.
[0009] Further, the combined seal ring includes a radial ring, a tangential ring I, and a tangential ring II that are adjacent to each other in sequence from left to right.
[0010] Further, packing box sealing rings are provided on the right end faces of the packing box gland and the air leakage gland, and an air leakage sealing ring is provided on the right end face of the sealing gland.
[0011] Further, a solenoid valve is provided on the gas recovery pipeline, and a check valve is provided at a position of the gas recovery pipeline close to the gas collecting tank.
[0012] Further, the solenoid valve and the pressure sensor are electrically connected to an intermediate controller respectively.
[0013] Further, an exhaust pipe and a pressure gauge are provided on the gas collecting tank.
[0014] The beneficial effects achieved by the present utility model are as follows:
[0015] 1. The present utility model is provided with an air leakage cavity in the air leakage gland. The air leakage cavity is connected to the gas collecting tank through a gas recovery pipeline, and a check valve is provided at a position close to the gas collecting tank. The gas collecting tank is also provided with an exhaust pipe and a pressure gauge. When the solenoid valve on the gas recovery pipeline is opened, the gas in the air leakage cavity will flow into the gas collecting tank along the gas recovery pipeline. When the gas collected in the gas collecting tank is sufficient, it will enter the production system through the exhaust pipe to participate in the production cycle. The present utility model can not only re-collect and utilize the leaked gas, reduce the production cost, but also solve the problems of environmental pollution and safety hazards caused by the leaked gas, and at the same time greatly extend the service life of the stuffing box, ensuring the long-term safe and stable operation of the device.
[0016] 2. A nitrogen sealing cavity is formed between the sealing gland and the stuffing box gland of the present utility model, and a nitrogen pipe is provided to connect with the nitrogen sealing cavity. By injecting nitrogen into the nitrogen sealing cavity through the nitrogen pipe, the process gas leaked to the low-pressure side can be sealed to prevent the leaked gas from leaking to the outside of the stuffing box and polluting the production environment.
[0017] 3. An air leakage gland cavity is provided on the right side of the air leakage gland of the present utility model, and a pressure sensor is provided in the air leakage gland cavity. When the leakage amount of the stuffing box becomes larger, the pressure sensor transmits a pressure signal to the intermediate controller, triggering the minimum pressure alarm of the intermediate controller. The intermediate controller issues a signal to open the solenoid valve to discharge the gas in the air leakage cavity. The whole process does not require manual control, extending the service life of the stuffing box device. Description of the Drawings
[0018] Figure 1Schematic diagram of the overall structure of the present utility model;
[0019] Figure 2 is Figure 1 schematic diagram of the stuffing box structure in
[0020] Figure 3 is Figure 1 schematic diagram of the gas collecting tank structure in
[0021] Explanation of the markings in the figure: 1. Stuffing box cylinder; 101. End face sealing ring; 102. Tooth-shaped seal; 2. Stuffing box gland; 201. Gland sealing ring; 3. Sealing cavity; 3001. Combined sealing ring; 301. Radial ring; 302. Tangential ring I; 303. Tangential ring II; 4. Stuffing box gland; 401. Leakage pressure gland; 402. Sealing gland; 403. Stuffing box sealing ring; 404. Leakage air sealing ring; 405. Leakage pressure gland cavity; 5. Pressure sensor; 6. Nitrogen sealing cavity; 601. Nitrogen pipe; 7. Leakage air cavity; 701. Solenoid valve; 702. Gas recovery pipeline; 8. Intermediate controller; 9. Check valve; 10. Gas collecting tank; 1001. Exhaust pipe; 1002. Pressure gauge. Detailed implementation manners
[0022] In order to better understand the purpose, structure and function of the present utility model, the following further describes in detail a reciprocating compressor stuffing box device with leakage recovery of the present utility model in conjunction with the attached drawings.
[0023] As Figures 1 to 3 shown, a reciprocating compressor stuffing box device with leakage recovery includes a stuffing box cylinder 1. An end face sealing ring 101 is arranged on the left end face of the stuffing box cylinder 1. The end face sealing ring 101 can seal the gas leaking from the end face of the stuffing box, preventing the medium gas from leaking to the outside along the outer edge of the stuffing box cylinder 1. The right end face of the stuffing box cylinder 1 is hermetically connected with a stuffing box gland 2, and a gland sealing ring 201 is arranged between the stuffing box cylinder 1 and the stuffing box gland 2.
[0024] The cross-sectional area of the interior of the stuffing box cylinder 1 gradually increases from left to right in a stepped shape. A tooth-shaped seal 102 is arranged at the leftmost side inside the stuffing box cylinder 1. The tooth-shaped seal 102 is made of polytetrafluoroethylene. When the gas coming from inside the cylinder enters the stuffing box along the piston rod, the tooth-shaped seal 102 located inside the stuffing box cylinder 1 can first play a sealing role, greatly reducing the process gas entering the stuffing box. At the same time, the piston rod will not be damaged when contacting the tooth-shaped seal 102 during the reciprocating movement.
[0025] Inside the stuffing box cylinder body 1, there are also multiple stuffing box gland covers 4 adjacent to each other front and back. Sealing cavities 3 are provided at the center position on the right side of the stuffing box gland cover 4 and on the right side of the serrated seal 102. A combined seal ring 3001 is arranged in the sealing cavity 3. The combined seal ring 3001 includes a radial ring 301, a tangential ring I 302, and a tangential ring II 303 adjacent to each other in sequence from left to right. A leakage pressure gland 401 is provided on the right side of the rightmost stuffing box gland cover 4. The leakage pressure gland 401 is arranged inside the stuffing box cylinder body 1. An air leakage cavity 7 is arranged inside the sealing gland 402. A gas recovery pipeline 702 is arranged on one side of the air leakage cavity 7. The gas recovery pipeline 702 passes through the stuffing box cylinder body 1 and is connected to the stuffing box gland 2 and the gas collecting tank 10. An electromagnetic valve 701 and a check valve 9 are arranged on the gas recovery pipeline 702. The check valve 9 is arranged at a position close to the gas collecting tank 10. A pressure gauge 1002 and an exhaust pipe 1001 are also arranged on the gas collecting tank 10. The electromagnetic valve 701 is electrically connected to the intermediate controller 8. When the electromagnetic valve 701 on the gas recovery pipeline 702 is opened, the gas in the air leakage cavity 7 will enter the gas collecting tank 10 along the gas recovery pipeline 702. When the gas collected in the gas collecting tank 10 is sufficient, it will enter the production system through the exhaust pipe 1001 to participate in the production cycle.
[0026] A sealing gland 402 is arranged on the right side of the leakage pressure gland 401. A leakage pressure gland cavity 405 is arranged between the leakage pressure gland 401 and the sealing gland 402. A pressure sensor 5 is arranged in the leakage pressure gland cavity 405. The pressure sensor 5 passes through the stuffing box gland 2 and is electrically connected to the intermediate controller 8. When the leakage gas volume of the stuffing box becomes larger, the pressure sensor 5 transmits a pressure signal to the intermediate controller 8, triggering the minimum pressure alarm of the intermediate controller 8. The intermediate controller 8 issues a signal to open the electromagnetic valve 701 on the gas recovery pipeline 702, so that the gas in the air leakage cavity 7 enters the gas collecting tank 10.
[0027] Stuffing box sealing rings 403 are arranged on the right end faces of the stuffing box gland cover 4 and the leakage pressure gland 401. An air leakage sealing ring 404 is arranged on the right end face of the sealing gland 402.
[0028] A nitrogen sealing cavity 6 is arranged between the sealing gland 402 and the stuffing box gland 2. A nitrogen pipe 601 is arranged on the nitrogen sealing cavity 6. By injecting nitrogen into the nitrogen sealing cavity 6 through the nitrogen pipe 601, the process gas leaking to the low-pressure side can be sealed to prevent the leaked gas from leaking outside the stuffing box.
[0029] In this device, when the piston of the reciprocating compressor compresses towards the stuffing box, the compressed gas leaks along the piston rod towards the crankcase. When the leaked gas enters the stuffing box device, first of all, the tooth-shaped seal 102 can achieve a good sealing effect, greatly reducing the process gas entering the interior of the stuffing box. The gas entering the interior of the sealing cavity 3, under the action of multiple combined sealing rings 3001, has a decreasing leakage rate and finally enters the air leakage cavity 7. When long-term operation causes the tooth-shaped seal 102 and the combined sealing rings 3001 to wear and the gas leakage rate to increase, more gas enters the air leakage cavity 7. The pressure sensor 5 transmits the pressure signal to the intermediate controller 8, triggering the minimum pressure alarm of the intermediate controller 8. The intermediate controller 8 sends a signal to open the solenoid valve 701, and the gas in the air leakage cavity 7 then enters the gas collecting tank 10 along the gas recovery pipeline 702. At the same time, the nitrogen sealing cavity 6 can seal the gas on the low-pressure side to prevent gas from leaking to the outside of the stuffing box. When the gas collected in the gas collecting tank 10 is sufficient, the gas in the gas collecting tank 10 enters the production system through the exhaust pipe 1001 to participate in the production cycle. This device can not only re-collect and utilize the leaked gas to reduce production costs, but also solve the problems of environmental pollution and safety hazards caused by the leaked gas. At the same time, it greatly extends the service life of the stuffing box and ensures the long-term safe and stable operation of the device.
[0030] The "left" and "right" mentioned above are defined according to Figure 1 the orientation of the reciprocating compressor stuffing box device in Figure 1 which the left side of the reciprocating compressor stuffing box device is defined as "left". This is only for the convenience of describing the solutions of the embodiments of the present utility model and does not impose any restrictions on the substantial content of the solutions of each embodiment.
[0031] It can be understood that the present utility model is described through some embodiments. As is known to those skilled in the art, without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.
Claims
1. A reciprocating compressor stuffing box device with leakage recovery, characterized in that: The invention comprises a stuffing box cylinder (1), wherein the right side of the stuffing box cylinder (1) is sealedly connected to a stuffing box gland (2), a toothed seal (102) is arranged on the left side of the stuffing box cylinder (1), a plurality of stuffing box glands (4) adjacent to each other are arranged in the stuffing box cylinder (1), a sealing cavity (3) is arranged at the center position of the right side of the stuffing box gland (4) and on the right side of the toothed seal (102), a combined sealing ring (3001) is arranged in the sealing cavity (3), a leaking gland (401) is arranged on the right side of the rightmost stuffing box gland (4), and the leaking gland (401) A gas leakage cavity (7) is arranged inside, one side of the gas leakage cavity (7) is connected to a gas collecting tank (10) via a gas recovery pipeline (702), a sealing gland (402) is arranged on the right side of the gas leakage gland (401), a gas leakage gland cavity (405) is arranged between the gas leakage gland (401) and the sealing gland (402), a pressure sensor (5) is arranged in the gas leakage gland cavity (405), a nitrogen sealing cavity (6) is arranged between the sealing gland (402) and the stuffing box gland (2), and a nitrogen pipe (601) connected to nitrogen is arranged on the nitrogen sealing cavity (6).
2. A reciprocating compressor stuffing box device with leakage recovery according to claim 1, characterized in that: An end face sealing ring (101) is arranged on the left end face of the stuffing box cylinder (1).
3. A reciprocating compressor stuffing box device with leakage recovery according to claim 1, characterized in that: A gland sealing ring (201) is provided between the stuffing box cylinder (1) and the stuffing box gland (2).
4. A reciprocating compressor stuffing box device with leakage recovery according to claim 1, characterized in that: The toothed seal (102) is made of polytetrafluoroethylene.
5. A reciprocating compressor stuffing box device with leakage recovery according to claim 1, characterized in that: The combined sealing ring (3001) comprises a radial ring (301), a tangential ring I (302) and a tangential ring II (303) which are adjacent to each other from left to right.
6. A reciprocating compressor stuffing box device with leakage recovery according to claim 1, characterized in that: The right end surfaces of the stuffing box gland (4) and the air leakage gland (401) are both provided with a stuffing box sealing ring (403), and the right end surface of the sealing gland (402) is provided with an air leakage sealing ring (404).
7. A reciprocating compressor stuffing box device with leakage recovery according to claim 1, characterized in that: The gas recovery pipeline (702) is provided with a solenoid valve (701), and a one-way valve (9) is provided at a position of the gas recovery pipeline (702) close to the gas collecting tank (10).
8. A reciprocating compressor stuffing box device with leakage recovery according to claim 7, characterized in that: The solenoid valve (701) and the pressure sensor (5) are electrically connected to the intermediate controller (8) respectively.
9. A reciprocating compressor stuffing box device with leakage recovery according to claim 1, characterized in that: The gas collecting tank (10) is provided with an exhaust pipe (1001) and a pressure gauge (1002).