Pipeline safety valve for gas delivery

Abstract

The utility model discloses a pipeline safety valve for gas delivery, which comprises a valve body and a valve cover, a valve cavity is arranged in the valve body, a valve core is arranged in the valve cavity, an elastic structure is arranged at the upper end of the valve core, an adjusting structure is arranged at the upper end of the elastic structure, and an inflow channel is communicated with the lower end of the valve cavity. An outflow channel is formed in one side of the inflow channel in a communicating mode, a pressure relief channel is formed in one side of the valve cavity in a communicating mode, an auxiliary pressure relief part is fixedly arranged at the position, located at the upper end of the pressure relief channel, of the valve body, a valve seat is fixedly arranged in the valve body, and a buffer ring and an elastic ring are arranged at the upper end of the valve seat; the upper ends of the buffer ring and the elastic ring abut against the lower end of the valve element, and a plurality of roller structures are arranged between the valve element and the valve body. The sealing force of the valve element can be adjusted, the valve element can quickly recover to a safe value when air pressure is too large, and the valve element and the valve seat are not prone to abrasion.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, and more specifically to a pipeline safety valve for gas transportation. Background Art

[0002] Safety valves are special valves whose opening and closing parts are normally closed under the action of external forces. When the pressure of the medium fluid in the equipment or pipeline exceeds the specified value, the medium fluid is discharged to the outside of the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value. Safety valves are automatic valves and are mainly used in boilers, pressure vessels and pipelines to control the pressure not to exceed the specified value, playing an important protective role in personal safety and equipment operation.

[0003] The safety valve disclosed in the prior art is CN203823166U. Through the cooperation of a spring, a spherical surface and a sealing plate, when the air pressure is too high, the sealing plate can be pushed open to discharge the gas, thereby reducing the air pressure to a safe value. However, the utility model still has the following problems: the sealing strength of the valve core of the safety valve is difficult to adjust, and when the air pressure in the safety valve is too high, the limited pressure relief channel cannot quickly reduce the air pressure to restore it to a safe value, and when the air pressure is restored, the return of the valve core will hit the valve seat, causing wear of the valve core and the valve seat, thereby reducing its service life. Therefore, the utility model proposes a pipeline safety valve for gas transportation. Utility Model Content

[0004] The utility model aims to provide a pipeline safety valve for gas transportation, which can adjust the sealing strength of the valve core and quickly restore the safety value when the gas pressure is too high, and the valve core and the valve seat are not easy to wear.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] 14. The utility model discloses a pipeline safety valve for gas transmission, comprising a valve body and a valve cover, wherein the valve cover is fixedly provided with the valve cover by bolts on the upper end of the valve body, a valve cavity is provided in the valve body, a valve core is provided in the valve cavity, an elastic structure is provided on the upper end of the valve core, an adjusting structure is provided on the upper end of the elastic structure, an inflow channel is communicated with the lower end of the valve cavity, an outflow channel is communicated with one side of the inflow channel, a pressure relief channel is communicated with one side of the valve cavity, an auxiliary pressure relief part is fixedly provided on the upper end of the valve body located at the pressure relief channel, a pressure-receiving channel is provided in the auxiliary pressure relief part, the lower end of the pressure-receiving channel is communicated with the pressure relief channel, a auxiliary channel is communicated with one side of the pressure-receiving channel, a sealing plate is provided in the pressure-receiving channel, a pressure spring is fixedly provided between the sealing plate and the auxiliary pressure relief part, a valve seat is fixedly provided in the valve body, a buffer ring and an elastic ring are provided on the upper end of the valve seat, the upper ends of the buffer ring and the elastic ring are abutted against the lower end of the valve core, and a plurality of roller structures are provided between the valve core and the valve body.

[0007] By adopting the above technical solution, the utility model has the following advantages:

[0008] The arrangement of the elastic structure and the adjusting structure of the utility model enables the adjusting structure to adjust the elastic force of the elastic structure on the valve core, thereby changing the sealing strength of the valve core; the arrangement of the pressure relief channel, the pressure receiving channel and the auxiliary channel of the utility model enables when the pressure exceeds a certain value, the excess gas will first squeeze the valve core and be discharged from the pressure relief channel; when the pressure relief channel does not meet the pressure relief requirements, the excess gas will squeeze the sealing plate and be discharged from the auxiliary channel, thereby realizing rapid recovery of the air pressure to a safe value; the arrangement of the buffer ring and the elastic ring of the utility model enables the valve core to return to its original position without hitting the valve seat after the air pressure returns to normal, thereby effectively reducing the wear of the valve core and the valve seat, thereby extending the service life of the utility model.

[0009] Furthermore, the adjustment structure includes a threaded column and a push plate, the upper end of the threaded column is fixedly connected to the handle, the lower end of the threaded column passes through the valve cover and is threadedly connected to the valve cover, the lower end of the threaded column is fixedly connected to the upper end of the push plate, a slider 1 is fixedly provided on both sides of the push plate, and a sliding groove 1 is provided at the positions of the two ends of the valve cover corresponding to the slider 1, and the slider 1 is clamped in the corresponding sliding groove 1.

[0010] By adopting the above technical solution, the utility model has the following advantages:

[0011] The arrangement of the threaded column and the push plate of the utility model enables the push plate to be controlled to move up and down when the handle is turned to drive the threaded column to rotate, thereby squeezing the second pressure spring.

[0012] Furthermore, the elastic structure includes a clamping plate and a second pressure spring, the clamping plates are fixedly provided at the upper and lower ends of the second pressure spring, the upper end of the valve core and the lower end of the push plate are both provided with clamping grooves, and the clamping plates are respectively clamped in the corresponding clamping grooves.

[0013] By adopting the above technical solution, the utility model has the following advantages:

[0014] The arrangement of the clamping plate and the clamping groove of the utility model enables the second pressure spring to be fixed between the push plate and the valve core.

[0015] Furthermore, the auxiliary pressure relief part is located at the upper end of the pressure channel and is fixed with a top cover through a threaded connection. The auxiliary pressure relief part is embedded with a sealing ring 1 at a position corresponding to the inside of the top cover. Sliders 2 are fixedly provided on both sides of the sealing plate. Positions corresponding to the sliders 2 in the pressure channel are provided with sliding grooves 2, and the slides 2 are clamped in the corresponding sliding grooves 2.

[0016] By adopting the above technical solution, the utility model has the following advantages:

[0017] The arrangement of the top cover and the sealing ring of the utility model can effectively prevent gas leakage, and also facilitates the subsequent replacement and maintenance of internal parts of the auxiliary pressure relief part.

[0018] Furthermore, an embedded groove is provided at the lower end of the valve core, the buffer ring is clamped in the embedded groove, an annular groove is provided at the upper end of the buffer ring, a plurality of high-elastic springs are fixedly provided in the annular groove, a movable ring plate is fixedly provided at the upper end of the high-elastic spring, a sealing ring is fixedly provided at the upper end of the movable ring plate, a sealing ring groove is provided at a position of the embedded groove corresponding to the sealing ring, and the sealing ring is clamped in the corresponding sealing ring groove.

[0019] By adopting the above technical solution, the utility model has the following advantages:

[0020] The high-elastic spring, movable ring plate and sealing ring of the utility model enable the valve core to return slowly due to the elastic force of the high-elastic spring and the sealing ring when the valve core moves downward, which can effectively reduce the collision between the valve core and the valve seat, thereby extending the service life of the valve core and the valve seat.

[0021] Furthermore, sliders three are fixedly provided on both sides of the lower end of the movable ring plate, and slide grooves three are provided in the annular groove at positions corresponding to the sliders three, and the sliders three are clamped in the corresponding slide grooves three.

[0022] By adopting the above technical solution, the utility model has the following advantages:

[0023] The arrangement of the sliding block three and the sliding groove three of the utility model enables the movable ring plate to only move up and down.

[0024] Furthermore, the roller structure includes a ball, and a plurality of circular grooves are provided inside the valve body at positions corresponding to the valve core, and the balls are provided in the circular grooves, and one side of the balls is against the valve core.

[0025] By adopting the above technical solution, the utility model has the following advantages:

[0026] The provision of the ball bearing of the utility model effectively reduces the friction between the valve core and the valve body, so that when the valve core moves up and down, the friction between the valve core and the valve body can be reduced, and the service life of the valve core and the valve body is effectively prolonged.

[0027] Furthermore, a sealing ring groove is provided inside the valve body at a position corresponding to the valve core, and a second sealing ring is fixedly provided in the sealing ring groove.

[0028] By adopting the above technical solution, the utility model has the following advantages:

[0029] The arrangement of the sealing ring 2 of the utility model strengthens the sealing performance between the valve body and the valve core, and can effectively prevent the leakage of the medium.

[0030] Furthermore, inner ring grooves are provided at corresponding positions of the lower end of the valve cover and the upper end of the valve body, a sealing ring three is clamped between the inner ring grooves, and a plurality of extrusion springs are fixedly provided between the sealing ring three and the corresponding inner ring grooves.

[0031] By adopting the above technical solution, the utility model has the following advantages:

[0032] The arrangement of the sealing ring and the extrusion spring of the utility model strengthens the sealing performance between the valve body and the valve cover, and can effectively prevent gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0034] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0035] Figure 2 For this utility model Figure 1 A in the middle is an enlarged schematic diagram of the structure;

[0036] Figure 3 For this utility model Figure 1 The enlarged structural diagram at B in the middle;

[0037] Figure 4 For this utility model Figure 1 Enlarged structural diagram at C in the middle.

[0038] Figure numerals: 1, valve body; 101, valve cavity; 102, inflow channel; 103, outflow channel; 104, pressure relief channel; 2, auxiliary pressure relief part; 201, pressure channel; 202, auxiliary channel; 203, slide groove 2; 3, push plate; 301, slider 1; 4, valve cover; 401, slide groove 1; 5, circular groove; 501, ball bearing; 6, buffer ring; 601, annular groove; 602, slide groove 3; 7, movable ring plate; 701, slider 3; 7 02. Sealing ring; 8. Valve core; 801. Embedded groove; 802. Sealing ring groove; 9. Threaded column; 10. Handle; 11. Clamp plate; 12. Pressure spring 2; 13. Clamp groove; 14. Inner ring groove; 15. Sealing ring 3; 16. Extrusion spring; 17. Sealing plate; 18. Sealing ring groove; 19. Sealing ring 2; 20. Top cover; 21. Sealing ring 1; 22. Pressure spring 1; 23. High elastic spring; 24. Elastic ring; 25. Valve seat. DETAILED DESCRIPTION

[0039] like Figures 1 to 4As shown, in the specific embodiment, a pipeline safety valve for gas transportation includes a valve body 1 and a valve cover 4. The valve cover 4 is fixedly provided at the upper end of the valve body 1 by bolts. A valve cavity 101 is provided in the valve body 1. A valve core 8 is provided in the valve cavity 101. An elastic structure is provided at the upper end of the valve core 8. An adjustment structure is provided at the upper end of the elastic structure. An inflow channel 102 is communicated at the lower end of the valve cavity 101. An outflow channel 103 is communicated at one side of the inflow channel 102. A pressure relief channel 104 is communicated at one side of the valve cavity 101. The valve body 1 is fixed at the upper end of the pressure relief channel 104. A secondary pressure relief part 2 is fixedly provided, and a pressure channel 201 is provided in the secondary pressure relief part 2. The lower end of the pressure channel 201 is communicated with the pressure relief channel 104, and a secondary channel 202 is provided on one side of the pressure channel 201. A sealing plate 17 is provided in the pressure channel 201, and a pressure spring 22 is fixedly provided between the sealing plate 17 and the secondary pressure relief part 2. A valve seat 25 is fixedly provided in the valve body 1, and a buffer ring 6 and an elastic ring 24 are provided on the upper end of the valve seat 25. The upper ends of the buffer ring 6 and the elastic ring 24 are abutted against the lower end of the valve core 8, and a plurality of roller structures are provided between the valve core 8 and the valve body 1.

[0040] Through the above settings, the settings of the elastic structure and the adjustment structure of the utility model enable the adjustment structure to adjust the elastic force of the elastic structure on the valve core 8, thereby changing the sealing strength of the valve core 8; the settings of the pressure relief channel 104, the pressure-bearing channel 201 and the auxiliary channel 202 of the utility model enable when the pressure exceeds a certain value, the excess gas will first squeeze the valve core 8 and be discharged from the pressure relief channel 104, and when the pressure relief channel 104 does not meet the pressure relief requirements, the excess gas will squeeze the sealing plate 17 and be discharged from the auxiliary channel 202, so that the air pressure can be quickly restored to a safe value; the settings of the buffer ring 6 and the elastic ring 24 of the utility model enable the valve core 8 to return to its original position after the air pressure returns to normal without hitting the valve seat 25, thereby effectively reducing the wear of the valve core 8 and the valve seat 25, thereby extending the service life of the utility model.

[0041] like Figure 1 to Figure 2As shown, the adjustment structure includes a threaded column 9 and a push plate 3, the upper end of the threaded column 9 is fixedly connected to the handle 10, the lower end of the threaded column 9 passes through the valve cover 4 and is threadedly connected to the valve cover 4, the lower end of the threaded column 9 is fixedly connected to the upper end of the push plate 3, both sides of the push plate 3 are fixedly provided with a slider 301, and the positions of the slider 301 at both ends of the valve cover 4 are provided with a slide groove 401, and the slider 301 is clamped in the corresponding slide groove 401; the elastic structure includes a clamping plate 11 and a pressure spring 12, and the pressure spring 12 has two upper and lower A clamping plate 11 is fixedly provided at the end, a clamping groove 13 is provided at the upper end of the valve core 8 and the lower end of the push plate 3, and the clamping plates 11 are respectively clamped in the corresponding clamping grooves 13; the auxiliary pressure relief part 2 is located at the upper end of the pressure channel 201 and is fixed with a top cover 20 through a threaded connection, a sealing ring 21 is embedded in the position of the auxiliary pressure relief part 2 corresponding to the inside of the top cover 20, sliders 2 are fixedly provided on both sides of the sealing plate 17, and slide grooves 203 are provided at the positions corresponding to the slides 2 in the pressure channel 201, and the slides 2 are clamped in the corresponding slide grooves 203.

[0042] Through the above settings, the settings of the threaded column 9 and the push plate 3 of the utility model enable the push plate 3 to move up and down when the handle 10 drives the threaded column 9 to rotate, thereby realizing the squeezing of the pressure spring 2 12; the settings of the clamping plate 11 and the clamping groove 13 of the utility model enable the pressure spring 2 12 to be fixed between the push plate 3 and the valve core 8; the settings of the top cover 20 and the sealing ring 21 of the utility model can effectively prevent gas leakage, and in addition, it is convenient for the subsequent replacement and maintenance of the internal parts of the auxiliary pressure relief part 2.

[0043] like Figure 1 and Figure 3 As shown, an embedded groove 801 is provided at the lower end of the valve core 8, and the buffer ring 6 is clamped in the embedded groove 801. An annular groove 601 is provided at the upper end of the buffer ring 6. A plurality of high-elastic springs 23 are fixedly provided in the annular groove 601. A movable ring plate 7 is fixedly provided at the upper end of the high-elastic spring 23. A sealing ring 702 is fixedly provided at the upper end of the movable ring plate 7. A sealing ring groove 802 is provided at a position of the embedded groove 801 corresponding to the sealing ring 702, and the sealing ring 702 is clamped in the corresponding sealing ring groove 802; sliders three 701 are fixedly provided on both sides of the lower end of the movable ring plate 7, and a sliding groove three 602 is provided in the annular groove 601 at a position corresponding to the sliding groove three 701, and the sliding groove three 701 is clamped in the corresponding sliding groove three 602.

[0044] Through the above settings, the settings of the high-elastic spring 23, the movable ring plate 7 and the sealing ring 702 of the utility model enable the valve core 8 to slowly return to its position due to the elastic force of the high-elastic spring 23 and the sealing ring 702 when the valve core 8 moves downward, which can effectively reduce the collision between the valve core 8 and the valve seat 25, thereby extending the service life of the valve core 8 and the valve seat 25; the settings of the slider three 701 and the slide groove three 602 of the utility model enable the movable ring plate 7 to only move up and down.

[0045] like Figure 1 and Figure 4 As shown, the roller structure includes a ball 501, and a plurality of circular grooves 5 are provided at the inner side of the valve body 1 at positions corresponding to the valve core 8, and the circular grooves 5 are provided with balls 501, and one side of the balls 501 is against the valve core 8; a sealing ring groove 18 is provided at the inner side of the valve body 1 at positions corresponding to the valve core 8, and a sealing ring 2 19 is fixedly provided in the sealing ring groove 18; inner ring grooves 14 are provided at positions corresponding to the lower end of the valve cover 4 and the upper end of the valve body 1, and sealing rings 3 15 are clamped between the inner ring grooves 14, and a plurality of extrusion springs 16 are fixedly provided between the sealing rings 3 15 and the corresponding inner ring grooves 14.

[0046] Through the above settings, the setting of the ball 501 of the utility model effectively reduces the friction between the valve core 8 and the valve body 1, so that when the valve core 8 moves up and down, the friction between the valve body 1 can be reduced, and the service life of the valve core 8 and the valve body 1 is effectively extended; the setting of the sealing ring 2 19 of the utility model strengthens the sealing between the valve body 1 and the valve core 8, and can effectively prevent medium leakage; the setting of the sealing ring 3 15 and the extrusion spring 16 of the utility model strengthens the sealing between the valve body 1 and the valve cover 4, and can effectively prevent gas leakage.

[0047] Working principle: When in use, the handle 10 can be turned to drive the threaded column 9 to rotate, thereby driving the push plate 3 to move downward to squeeze the pressure spring 2 12, so as to adjust the sealing force of the valve core 8. When in use, it is necessary to first connect the inflow channel 102 with the inflow pipe, the outflow channel 103 with the outflow pipe, and the pressure relief channel 104 and the auxiliary channel 202 with the discharge pipe. When the air pressure in the valve body 1 is normal, the gas will be transported from the inflow pipe to the outflow pipe. When the air pressure becomes high, the valve core 8 will be squeezed, and the valve core 8 will squeeze the pressure spring 2 12, so that the gas is discharged through the pressure relief channel 104 until When the air pressure in the valve body 1 is normal, the valve core 8 will return to its original position due to the elastic force of the pressure spring 12. When the air pressure is too high, the gas will squeeze the sealing plate 17 when passing through the pressure relief channel 104, and the sealing plate 17 will squeeze the pressure spring 22. The excess air pressure will be discharged through the secondary channel 202, increasing the area of ​​the exhaust channel, so that the excessive pressure can be quickly restored to a normal value. When the valve core 8 returns to its original position, the sealing ring 702, the high-elastic spring 23 and the elastic ring 24 will play a role in buffering the impact force of the valve core 8 falling, reducing the impact between the valve seat 25 and the valve core 8, thereby effectively extending the service life of the utility model.

[0048] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A gas transmission pipeline safety valve, comprising a valve body (1) and a valve cover (4), wherein the valve cover (4) is fixedly provided at the upper end of the valve body (1) by bolts, wherein a valve cavity (101) is provided in the valve body (1), wherein a valve core (8) is provided in the valve cavity (101), wherein the valve body (1) is provided with a valve core (8), wherein the valve body (1) is provided with a valve body (101 ... The upper end of the valve core (8) is provided with an elastic structure, the upper end of the elastic structure is provided with an adjustment structure, the lower end of the valve cavity (101) is provided with an inflow channel (102), one side of the inflow channel (102) is provided with an outflow channel (103), one side of the valve cavity (101) is provided with a pressure relief channel (104), the valve body (1) is located at the upper end of the pressure relief channel (104) and is fixedly provided with an auxiliary pressure relief part (2), the auxiliary pressure relief part (2) is provided with a pressure receiving channel (201), the lower end of the pressure receiving channel (201) is connected to the pressure relief channel (104) A secondary channel (202) is provided on one side of the pressure channel (201), a sealing plate (17) is provided in the pressure channel (201), a pressure spring (22) is fixedly provided between the sealing plate (17) and the secondary pressure relief portion (2), a valve seat (25) is fixedly provided in the valve body (1), a buffer ring (6) and an elastic ring (24) are provided at the upper end of the valve seat (25), the upper ends of the buffer ring (6) and the elastic ring (24) are abutted against the lower end of the valve core (8), and a plurality of roller structures are provided between the valve core (8) and the valve body (1).

2. A gas transmission pipeline safety valve according to claim 1, characterized in that: The adjustment structure comprises a threaded column (9) and a push plate (3), the upper end of the threaded column (9) is fixedly connected to the handle (10), the lower end of the threaded column (9) passes through the valve cover (4) and is threadedly connected to the valve cover (4), the lower end of the threaded column (9) is fixedly connected to the upper end of the push plate (3), a slider (301) is fixedly provided on both sides of the push plate (3), a slide groove (401) is provided at both ends of the valve cover (4) corresponding to the position of the slider (301), and the slider (301) is clamped in the corresponding slide groove (401).

3. A gas transmission pipeline safety valve according to claim 2, characterized in that: The elastic structure comprises a clamping plate (11) and a second pressure spring (12); the clamping plate (11) is fixedly provided at the upper and lower ends of the second pressure spring (12); the upper end of the valve core (8) and the lower end of the push plate (3) are both provided with clamping grooves (13); and the clamping plates (11) are respectively clamped in the corresponding clamping grooves (13).

4. A gas transmission pipeline safety valve according to claim 1, characterized in that: The auxiliary pressure relief portion (2) is located at the upper end of the pressure channel (201) and is fixedly provided with a top cover (20) through a threaded connection. The auxiliary pressure relief portion (2) is embedded with a sealing ring (21) at a position corresponding to the inside of the top cover (20). Slide blocks (2) are fixedly provided on both sides of the sealing plate (17). Positions in the pressure channel (201) corresponding to the slide blocks (2) are provided with slide grooves (203), and the slide blocks (2) are clamped in the corresponding slide grooves (203).

5. A gas transmission pipeline safety valve according to claim 1, characterized in that: The lower end of the valve core (8) is provided with an embedded groove (801), the buffer ring (6) is clamped in the embedded groove (801), the upper end of the buffer ring (6) is provided with an annular groove (601), a plurality of high-elastic springs (23) are fixedly provided in the annular groove (601), a movable ring plate (7) is fixedly provided at the upper end of the high-elastic spring (23), a sealing ring (702) is fixedly provided at the upper end of the movable ring plate (7), a sealing ring groove (802) is provided at a position of the embedded groove (801) corresponding to the sealing ring (702), and the sealing ring (702) is clamped in the corresponding sealing ring groove (802).

6. A gas transmission pipeline safety valve according to claim 5, characterized in that: Slide blocks (701) are fixedly provided on both sides of the lower end of the movable ring plate (7), and slide grooves (602) are provided in the annular groove (601) at positions corresponding to the slide blocks (701), and the slide blocks (701) are clamped in the corresponding slide grooves (602).

7. A gas transmission pipeline safety valve according to claim 1, characterized in that: The roller structure comprises a ball (501), and a plurality of circular grooves (5) are provided on the inner side of the valve body (1) at positions corresponding to the valve core (8), and the ball (501) is provided in each of the circular grooves (5), and one side of the ball (501) is in contact with the valve core (8).

8. A gas transmission pipeline safety valve according to claim 7, characterized in that: A sealing ring groove (18) is provided on the inner side of the valve body (1) at a position corresponding to the valve core (8), and a second sealing ring (19) is fixedly provided in the sealing ring groove (18).

9. A gas transmission pipeline safety valve according to claim 1, characterized in that: An inner ring groove (14) is provided at corresponding positions of the lower end of the valve cover (4) and the upper end of the valve body (1), a sealing ring three (15) is clamped between the inner ring grooves (14), and a plurality of extrusion springs (16) are fixedly provided between the sealing ring three (15) and the corresponding inner ring grooves (14).

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