Lubricating mechanism of safety valve of natural gas conveying pipeline

Abstract

The utility model relates to the technical field of safety valves, in particular to a lubricating mechanism of a safety valve of a natural gas conveying pipeline, which comprises an upper tank body, a feeding pipe fixedly connected with one side of the upper tank body, a handle ring rotatably connected with the inside of the feeding pipe, two guide grooves arranged inside the handle ring, and two baffles slidably connected with the inside of the feeding pipe. When lubricating liquid is injected into the tank body through the feeding pipe, the handle ring is held and pulled to rotate anticlockwise, the round rods are pushed to slide along the guide grooves in the rotating process of the handle ring, the two baffles are driven to slide outwards by screwing the handle ring anticlockwise, and the lubricating liquid is injected into the tank body through the feeding pipe. The two baffles slide outwards to open the liquid inlet channel, the size of the opening can be adjusted according to actual requirements by controlling the rotation angle of the handle ring, so that the liquid inlet flow is controlled, the liquid inlet channel is controlled by screwing the handle ring, operation is easy and convenient, and daily operation and maintenance of equipment are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, in particular to a lubricating mechanism for a safety valve of a natural gas transmission pipeline. Background Art

[0002] The safety valve for natural gas transmission pipelines is a safety protection device used in natural gas transmission pipeline systems. When the pressure in the natural gas transmission pipeline is normal, the valve core is pressed tightly against the valve seat under the action of the spring, maintaining a sealed state and allowing natural gas to circulate normally. When the pressure in the pipeline rises to exceed the set pressure of the safety valve, the force acting on the valve core overcomes the elastic force of the spring, causing the valve core to lift, and the natural gas is released into the atmosphere or other safe areas through the discharge port of the safety valve, thereby reducing the pressure in the pipeline. The safety valve needs to be lubricated when in use.

[0003] For example, a Chinese patent discloses: an automatic lubrication mechanism for an electric valve, patent number: CN220249108U, which adopts the design of a valve body, an oil inlet pipe, an oil outlet pipe, and a lubrication pump. The lubricating oil is added into the valve body through the oil inlet pipe by the lubrication pump. While the valve is continuously opened and closed, the lubricating oil is evenly added to every part of the valve stem thread, and then returned to the lubrication pump through the oil outlet pipe, thereby achieving lubrication of the valve thread and greatly reducing the wear of the valve thread.

[0004] However, during the implementation of the above technical solution, it was found that there were at least the following technical problems: the above device needs to add lubricating liquid into the device through the oil inlet pipe before use, and the inside of the device is usually sealed by screwing the cover during storage. However, the direct sealing by screwing the cover cannot adjust the size of the device opening, which will lead to an unsmooth adding process. For example, when a large amount of lubricating liquid needs to be added quickly, a small opening may limit the flow rate and prolong the operation time. When the addition amount needs to be precisely controlled, a large opening may lead to excessive addition, which is difficult to accurately grasp, and it usually takes a long time to screw the cover, causing inconvenience in operation. Utility Model Content

[0005] (1) Technical problems solved

[0006] In response to the deficiencies in the prior art, the utility model provides a lubrication mechanism for a natural gas transmission pipeline safety valve, which solves the problem that the above-mentioned device needs to add lubricating liquid into the device through the oil inlet pipe before use, and the inside of the device is usually sealed by screwing the cover during storage. However, the direct sealing by screwing the cover cannot adjust the size of the device opening, which may lead to an unsmooth adding process. For example, when a large amount of lubricating liquid needs to be added quickly, a small opening may limit the flow rate and prolong the operation time. When the addition amount needs to be precisely controlled, a large opening may lead to excessive addition, which is difficult to accurately grasp. In addition, it usually takes a long time to screw the cover, resulting in inconvenient operation.

[0007] (2) Technical solution

[0008] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A lubrication mechanism for a natural gas transmission pipeline safety valve comprises an upper tank body, a feed pipe is fixedly connected to one side of the upper tank body, a handle ring is rotatably connected to the inside of the feed pipe, two guide grooves are provided inside the handle ring, two baffles are slidably connected to the inside of the feed pipe, the upper ends of the two baffles are fixedly connected to round rods, the two round rods are both sleeved in the guide grooves, the outer surface of the handle ring is sleeved with a limiting mechanism, the limiting mechanism comprises a ratchet, and the ratchet is sleeved on the outer surface of the handle ring.

[0010] Preferably, a ratchet is rotatably connected inside the feed pipe.

[0011] Preferably, a chute is provided inside the feed pipe, and a spring is fixedly connected inside the chute.

[0012] Preferably, the upper end of the spring is fixedly connected with a cambered block.

[0013] Preferably, a connecting pipe is sleeved inside the upper tank body.

[0014] Preferably, the outer surface of the connecting pipe is sleeved with a safety valve body, and the lower end of the upper tank body is threadedly connected to the lower tank body.

[0015] Preferably, a rotating shaft is rotatably connected inside the lower tank body, and a mounting rod is sleeved inside the rotating shaft.

[0016] Preferably, two flexible scrapers are fixedly connected inside the mounting rod.

[0017] (3) Beneficial effects

[0018] 1. When injecting lubricating liquid into the upper tank body through the feed pipe, hold and pull the handle ring to rotate it counterclockwise. During the rotation of the handle ring, the round rod is pushed to slide along the guide groove. By turning the handle ring counterclockwise, the two baffles are driven to slide outward. The two baffles slide outward to open the liquid inlet channel. By controlling the rotation angle of the handle ring, the opening size can be adjusted according to actual needs, thereby controlling the liquid inlet flow rate. The liquid inlet channel is controlled by turning the handle ring to prevent dust particles from falling into the upper tank body during the storage process. The operation is simple and convenient, which facilitates the daily operation and maintenance of the equipment.

[0019] 2. The lubricating liquid is injected into the upper tank body and the lower tank body through the feed pipe for storage. The upper tank body and the lower tank body are connected by screwing a thread. When maintenance work is needed, the lower tank body can be unscrewed to remove the lower tank body from the upper tank body. The mounting rod can be driven to rotate by rotating the rotating shaft, and the mounting rod drives the flexible scraper to rotate in the lower tank body. The flexible scraper and the inner wall of the lower tank body fit together. During the rotation of the rotating shaft, the sediment at the bottom of the lower tank body can be scraped off and accumulated on the inclined surface of the flexible scraper. The deposits on the inner wall of the lower tank body can be cleaned by wiping the flexible scraper, which is beneficial to improve the lubricating effect of the lubricating liquid and facilitates cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0021] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0022] Figure 2 This is an exploded view of the lower tank connection of the utility model;

[0023] Figure 3 This is an exploded view of the handle ring connection of the utility model;

[0024] Figure 4 This is an exploded view of the flexible scraper connection of the utility model.

[0025] Legend: 11. Upper tank body; 12. Feed pipe; 13. Handle ring; 14. Guide groove; 15. Baffle; 16. Round rod; 17. Ratchet; 18. Pawl; 19. Slide; 21. Spring; 22. Arc block; 23. Connecting pipe; 24. Safety valve body; 25. Lower tank body; 26. Rotating shaft; 27. Mounting rod; 28. Flexible scraper. DETAILED DESCRIPTION

[0026] The embodiment of the present application provides a lubricating mechanism for a natural gas pipeline safety valve, which effectively solves the problem that the above device needs to add lubricating liquid into the device through the oil inlet pipe before use. During storage, the inside of the device is usually sealed by screwing the cover. However, the size of the opening of the device cannot be adjusted by directly sealing by screwing the cover, which will lead to an unsmooth adding process. For example, when a large amount of lubricating liquid needs to be added quickly, a small opening may limit the flow rate and prolong the operation time. When the amount of addition needs to be precisely controlled, a large opening may lead to over-addition, which is difficult to accurately control. In addition, the time required to screw the cover is usually too long. The time is long, which makes the operation inconvenient. When injecting lubricating liquid into the upper tank body through the feed pipe, hold and pull the handle ring to rotate it counterclockwise. During the rotation of the handle ring, the round rod is pushed to slide along the guide groove. By twisting the handle ring counterclockwise, the two baffles are driven to slide outward, and the two baffles slide outward to open the liquid inlet channel. By controlling the rotation angle of the handle ring, the opening size can be adjusted according to actual needs, thereby controlling the liquid inlet flow rate, and the liquid inlet channel is controlled by twisting the handle ring to prevent dust particles from falling into the upper tank body during the storage process. The operation is simple and convenient, which facilitates the daily operation and maintenance of the equipment.

[0027] Example

[0028] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, the technical solution in the embodiment of the present application is to effectively solve the problem that the above-mentioned device needs to add lubricating liquid into the device through the oil inlet pipe before use, and the inside of the device is usually sealed by screwing the cover during storage. However, the size of the opening of the device cannot be adjusted by directly sealing it by screwing the cover, which will lead to an unsmooth adding process. For example, when a large amount of lubricating liquid needs to be added quickly, a small opening may limit the flow rate and prolong the operation time. When the addition amount needs to be accurately controlled, a large opening may cause excessive addition, which is difficult to accurately grasp, and it usually takes a long time to screw the cover, resulting in inconvenient operation. The overall idea is as follows: A lubricating mechanism for a natural gas pipeline safety valve comprises an upper tank body 11, and a feed pipe 1 is fixedly connected to one side of the upper tank body 11. 2. The feed tube 12 is rotatably connected to a handle ring 13, and two guide grooves 14 are provided inside the handle ring 13. The feed tube 12 is slidably connected to two baffles 15. The upper ends of the two baffles 15 are fixedly connected to round rods 16, and the two round rods 16 are sleeved inside the guide grooves 14. The outer surface of the handle ring 13 is sleeved with a limiting mechanism, and the limiting mechanism includes a ratchet 17, and the ratchet 17 is sleeved on the outer surface of the handle ring 13. The feed tube 12 is rotatably connected to a pawl 18, and the ratchet 17 and the pawl 18 are adapted. A slide groove 19 is provided inside the feed tube 12, and a spring 21 is fixedly connected to the slide groove 19. The upper end of the spring 21 is fixedly connected to an arc block 22, and the arc block 22 is slidably connected to the slide groove 19. The arc block 22 and the pawl 18 are in the same position. On a horizontal line, when injecting lubricating liquid into the upper tank body 11 through the feed pipe 12, hold and pull the handle ring 13 to rotate counterclockwise. During the rotation of the handle ring 13, the round rod 16 is pushed to slide along the guide groove 14. By twisting the handle ring 13 counterclockwise, the two baffles 15 are driven to slide outward. The two baffles 15 slide outward to open the liquid inlet channel. By controlling the rotation angle of the handle ring 13, the opening size can be adjusted according to actual needs, thereby controlling the liquid inlet flow rate, and controlling the liquid inlet channel by twisting the handle ring 13 is simple and convenient to operate, which facilitates the daily operation and maintenance of the equipment. When the handle ring 13 is rotated clockwise to close the liquid inlet channel, the ratchet 17 rotates to squeeze the pawl 18 to rotate (when the ratchet 17 squeezes the pawl 18 and rotates, the pawl The stroke of 18 does not exceed the placement position of the arc surface block 22, so it will not be limited by the arc surface block 22). When the handle ring 13 is rotated counterclockwise, the pawl 18 interferes to prevent the handle ring 13 from rotating. When the opening operation is required, the pawl 18 is pressed counterclockwise to rotate, and the handle ring 13 can be twisted to open the handle ring 13, which is beneficial to improving the safety of the handle ring 13 when in use and avoiding the accidental opening of the handle ring 13 due to mistouch. When the pawl 18 is pressed to rotate and the limit is canceled, the pawl 18 rotates to squeeze the arc surface block 22 to slide downward, and when it rotates counterclockwise to contact the inner wall of the feed tube 12, the force of the spring 21 drives the arc surface block 22 to slide upward. At this time, the pawl 18 is released, and the pawl 18 will be temporarily fixed in the current position due to the limit of the arc surface block 22.At this time, the handle ring 13 can be manually rotated to adjust the opening size, which is beneficial to improving the controllability of the device.

[0029] A connecting pipe 23 is sleeved on the inside of the upper tank body 11, and a safety valve body 24 is sleeved on the outer surface of the connecting pipe 23. The lower end of the upper tank body 11 is threadedly connected to the lower tank body 25. The safety valve body 24 is connected to the natural gas transmission pipeline. When the pressure in the natural gas transmission pipeline exceeds the set safety value through the safety valve body 24, the safety valve will automatically open and release part of the natural gas to reduce the pressure in the pipeline, prevent the pipeline from rupturing or exploding due to excessive pressure, and protect the safety of the pipeline system and the surrounding environment. When in use, the upper tank body 11 and the safety valve body 24 are connected through the connecting pipe 23, and lubricant can be added to the upper tank body 11 and the lower tank body 25 through the feed pipe 12 (the upper tank body 11 includes an electric pump, which is driven by the motor to draw the lubricating liquid from the upper tank body 11 and inject it into the safety valve body 24. The feed pipe 12 is connected to a switch valve for switching the lubricating liquid delivery channel) to lubricate the connecting parts in the safety valve body 24.

[0030] The lower tank body 25 is rotatably connected to a rotating shaft 26, and a mounting rod 27 is sleeved inside the rotating shaft 26. Two flexible scrapers 28 are fixedly connected to the mounting rod 27. The two flexible scrapers 28 are in contact with the inner wall of the lower tank body 25. The lubricating liquid is injected into the upper tank body 11 and the lower tank body 25 through the feed pipe 12 for storage. The upper tank body 11 and the lower tank body 25 are connected by screwing. When maintenance work is required, the lower tank body 25 can be unscrewed to remove the lower tank body 25 from the upper tank body 11. The mounting rod 27 can be rotated by rotating the rotating shaft 26. The mounting rod 27 The flexible scraper 28 is driven to rotate in the lower tank body 25, and the flexible scraper 28 fits the inner wall of the lower tank body 25 (the flexible scraper 28 is made of silicone, which can better fit the inner wall of the lower tank body 25, ensuring more thorough scraping of the sediment, and also reducing the wear of the lower tank body 25). During the rotation of the rotating shaft 26, the sediment at the bottom of the lower tank body 25 can be scraped off and accumulated on the inclined surface of the flexible scraper 28. By wiping the flexible scraper 28, the deposits on the inner wall of the lower tank body 25 are cleaned, which is beneficial to improving the lubricating effect of the lubricating fluid and facilitating cleaning.

[0031] In response to the problems existing in the prior art, the utility model provides a lubrication mechanism for a natural gas transmission pipeline safety valve. When lubricating liquid is injected into the upper tank body 11 through the feed pipe 12, the handle ring 13 is held and pulled to rotate counterclockwise. During the rotation of the handle ring 13, the round rod 16 is pushed to slide along the guide groove 14. By screwing the handle ring 13 counterclockwise, the two baffles 15 are driven to slide outward. The two baffles 15 slide outward to open the liquid inlet channel. By controlling the rotation angle of the handle ring 13, the opening size can be adjusted according to actual needs, thereby controlling the liquid inlet flow rate. The liquid inlet channel is controlled by screwing the handle ring 13, and dust particles are prevented from falling into the upper tank body 11 during the storage process. The operation is simple and convenient, which facilitates the daily operation and maintenance of the equipment.

[0032] Working principle:

[0033] The first step is to connect the safety valve body 24 to the natural gas transmission pipeline. When the pressure in the natural gas transmission pipeline exceeds the set safety value through the safety valve body 24, the safety valve will automatically open and release part of the natural gas to reduce the pressure in the pipeline, prevent the pipeline from rupturing or exploding due to excessive pressure, and protect the safety of the pipeline system and the surrounding environment. When in use, the upper tank body 11 and the safety valve body 24 are connected through the connecting pipe 23, and lubricating lubricant can be added to the upper tank body 11 and the lower tank body 25 through the feed pipe 12 (the upper tank body 11 includes an electric pump, which is driven by the motor to extract the lubricating liquid from the upper tank body 11 and inject it into the safety valve body 24. The feed pipe 12 is connected with a switch valve for switching the lubricating liquid delivery channel) to lubricate the connecting parts in the safety valve body 24.

[0034] In the second step, when injecting lubricating liquid into the upper tank body 11 through the feed pipe 12, hold and pull the handle ring 13 to rotate counterclockwise. During the rotation of the handle ring 13, the round rod 16 is pushed to slide along the guide groove 14. By twisting the handle ring 13 counterclockwise, the two baffles 15 are driven to slide outward. The two baffles 15 slide outward to open the liquid inlet channel. By controlling the rotation angle of the handle ring 13, the opening size can be adjusted according to actual needs, thereby controlling the liquid inlet flow rate, and controlling the liquid inlet channel by twisting the handle ring 13. The operation is simple and convenient, which facilitates the daily operation and maintenance of the equipment. When twisting the handle ring 13 clockwise, the handle When the liquid inlet channel is closed, the ratchet 17 rotates to squeeze the pawl 18 to rotate (when the ratchet 17 squeezes the pawl 18 to rotate, the stroke of the pawl 18 does not exceed the placement position of the arc block 22, so it will not be limited by the arc block 22). When the handle ring 13 is rotated counterclockwise, the pawl 18 resists to prevent the handle ring 13 from rotating. When the opening operation is required, the pawl 18 is pressed counterclockwise to rotate. At this time, the handle ring 13 can be twisted to open the operation, which is beneficial to improve the safety of the handle ring 13 when in use and avoid the accidental opening of the handle ring 13 due to accidental touch. When the pawl 18 is pressed to rotate to cancel the limit, the pawl 18 When the cambered block 22 is rotated and squeezed to slide downward and rotated counterclockwise to contact the inner wall of the feed tube 12, the force of the spring 21 drives the cambered block 22 to slide upward. At this time, the pawl 18 is released. The pawl 18 will be temporarily fixed in the current position due to the limit of the cambered block 22. At this time, the handle ring 13 can be manually screwed to adjust the opening size, which is beneficial to improve the controllability of the device. The lubricating fluid is injected into the upper tank body 11 and the lower tank body 25 through the feed tube 12 for storage. The upper tank body 11 and the lower tank body 25 are connected by screwing. When maintenance work is required, the lower tank body 25 can be unscrewed to remove the lower tank body 25 from the upper tank body 11. It can be removed by screwing The rotating shaft 26 drives the mounting rod 27 to rotate, and the mounting rod 27 drives the flexible scraper 28 to rotate in the lower tank body 25. The flexible scraper 28 fits the inner wall of the lower tank body 25 (the flexible scraper 28 is made of silicone, which can better fit the inner wall of the lower tank body 25, ensuring a more thorough scraping of the sediment, while also reducing the wear on the lower tank body 25). During the rotation of the rotating shaft 26, the sediment at the bottom of the lower tank body 25 can be scraped off and accumulated on the inclined surface of the flexible scraper 28. By wiping the flexible scraper 28, the deposits on the inner wall of the lower tank body 25 are cleaned, which is beneficial to improving the lubricating effect of the lubricating fluid and facilitating cleaning.

[0035] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all possible embodiments. However, any obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A lubricating mechanism for a natural gas pipeline safety valve, comprising an upper tank body (11), wherein one side of the upper tank body (11) is fixedly connected to a feed pipe (12), characterized in that: The feed pipe (12) is rotatably connected to a handle ring (13), and two guide grooves (14) are provided inside the handle ring (13). The feed pipe (12) is slidably connected to two baffles (15), and the upper ends of the two baffles (15) are fixedly connected to round rods (16), and the two round rods (16) are sleeved inside the guide grooves (14); Wherein, the outer surface of the handle ring (13) is sleeved with a limiting mechanism; The limiting mechanism comprises a ratchet (17), and the ratchet (17) is sleeved on the outer surface of the handle ring (13).

2. A lubricating mechanism for a natural gas pipeline safety valve according to claim 1, characterized in that: A ratchet (18) is rotatably connected inside the feed pipe (12); Wherein, the ratchet wheel (17) and the pawl (18) are adapted to each other.

3. The lubricating mechanism of a natural gas pipeline safety valve according to claim 2, characterized in that: A chute (19) is provided inside the feed pipe (12); Wherein, a spring (21) is fixedly connected inside the sliding groove (19).

4. A lubricating mechanism for a natural gas pipeline safety valve according to claim 3, characterized in that: The upper end of the spring (21) is fixedly connected with a curved surface block (22); The arc surface block (22) is slidably connected inside the sliding groove (19).

5. The lubricating mechanism of a natural gas pipeline safety valve according to claim 4, characterized in that: The arc surface block (22) and the pawl (18) are on the same horizontal line; Wherein, a connecting pipe (23) is sleeved inside the upper tank body (11).

6. A lubricating mechanism for a natural gas pipeline safety valve according to claim 5, characterized in that: The outer surface of the connecting pipe (23) is sleeved with a safety valve body (24); The lower end of the upper tank body (11) is threadedly connected to the lower tank body (25).

7. A lubricating mechanism for a natural gas pipeline safety valve according to claim 6, characterized in that: The lower tank body (25) is rotatably connected to a rotating shaft (26); Wherein, a mounting rod (27) is sleeved inside the rotating shaft (26).

8. The lubricating mechanism of a natural gas pipeline safety valve according to claim 7, characterized in that: Two flexible scrapers (28) are fixedly connected inside the mounting rod (27); Wherein, the two flexible scrapers (28) are both in contact with the inner wall of the lower tank body (25).

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