Pressure-adjustable spring type safety valve

Abstract

The utility model discloses a pressure-adjustable spring type safety valve which comprises a valve body, a valve cover is fixedly arranged at the upper end of the valve body through a bolt, a valve cavity is formed in the valve body, a valve element is arranged in the valve cavity, an inflow channel is arranged at the lower end of the valve cavity in a communicated mode, an outflow channel is arranged on one side of the inflow channel, and a pressure relief channel is arranged on one side of the valve cavity. An elastic structure is arranged at the upper end of the valve element, an adjusting structure is arranged at the upper end of the elastic structure and comprises a threaded column, an adjusting plate is fixedly arranged at the lower end of the threaded column, and the upper end of the threaded column penetrates through the upper end of the valve cover and is in threaded connection with a gear disc structure; a control structure is fixedly arranged at the position, located on one side of the gear disc structure, of the upper end of the valve deck and comprises a second gear, and one side of the second gear is meshed with the first gear. The pressure is easy to adjust, the valve core and the valve seat are not easy to damage, and the service life of the safety valve is long.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, and more specifically to an adjustable pressure spring type safety valve. Background Art

[0002] A safety valve is a special valve in which the closing member is normally closed under the action of an external force. When the pressure of the medium fluid in the equipment or pipeline rises above 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. The safety valve belongs to the category of automatic valves and is mainly used on boilers, pressure vessels and pipelines to control the pressure not to exceed the specified value, playing an important role in protecting personal safety and equipment operation.

[0003] In the prior art, there is an adjustable safety valve with the publication number of CN217328641U. By rotating the adjusting sleeve, the compression amount of the spring by the adjusting sleeve is changed, so as to achieve the function of adjusting the pressure of the safety valve. However, due to the large elastic force of the spring, it is difficult to manually rotate the adjusting sleeve downward, which requires a lot of manpower. In addition, when the valve core is washed open and returns to its position by the medium, it will collide with the valve seat, so the valve core and the valve seat are easily damaged, shortening the service life of the safety valve. Therefore, the utility model proposes an adjustable pressure spring type safety valve. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an adjustable pressure spring type safety valve, which is easy to adjust the pressure, the valve core and the valve seat are not easily damaged, and the service life of the safety valve is long.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] The adjustable pressure spring type safety valve includes a valve body. The upper end of the valve body is fixedly provided with a valve cover through bolts. A valve cavity is arranged in the valve body. A valve core is arranged in the valve cavity. An inflow channel is communicated with the lower end of the valve cavity. An outflow channel is arranged on one side of the inflow channel. A pressure relief channel is arranged on one side of 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. The adjusting structure includes a threaded column. The lower end of the threaded column is fixedly provided with an adjusting plate. The upper end of the threaded column penetrates through the upper end of the valve cover and is threadedly connected with a gear disc structure. A handle is fixedly arranged at the upper end of the threaded column. The gear disc structure includes a gear one. The gear one is threadedly connected with the threaded column. A control structure is fixedly arranged on the upper end of the valve cover on one side of the gear disc structure. The control structure includes a gear two. One side of the gear two is engaged with the gear one. A valve seat is arranged in the valve cavity. A buffer structure is arranged at the upper end of the valve seat. The valve seat and the buffer structure abut against the lower end of the valve core.

[0007] Adopting the above technical solutions, the utility model has the following advantages:

[0008] The setting of the adjustment structure and the elastic structure of the present utility model enables, when using the present utility model, to drive the threaded column to move downward, thereby squeezing the elastic structure, so that the compression amount of the elastic structure can be changed, thus realizing the function of adjusting the pressure of the safety valve; the setting of the first gear and the second gear of the present utility model enables, when the control structure controls the second gear to rotate, to drive the first gear to rotate, thereby driving the threaded column to move up and down, making it unnecessary to manually rotate for adjustment, and the adjustment is more convenient and easier; the setting of the buffer structure of the present utility model can effectively buffer the impact force of the valve core falling, so that the valve core and the valve seat are not easily damaged, effectively extending the service life of the safety valve.

[0009] Further, the elastic structure includes a first spring and a fixing plate. The first spring is provided with the fixing plate at both the upper and lower ends. Inner embedding grooves are provided at the positions corresponding to the fixing plates at the upper end of the valve core and the lower end of the adjusting plate, and the fixing plate is clamped in the inner embedding groove.

[0010] Adopting the above technical solutions, the present utility model has the following advantages:

[0011] The setting of the inner embedding groove of the present utility model enables the elastic structure to be quickly positioned between the valve core and the adjusting plate, playing a role in squeezing the valve core, so that a certain pressure is required for the valve core to move upward.

[0012] Further, side sliding blocks are fixedly arranged on the outer circle of the adjusting plate. Side sliding grooves are provided at the positions corresponding to the side sliding blocks on the inner side of the valve cover. The side sliding blocks are clamped in the side sliding grooves. An annular groove is provided on the outer end face of the side sliding block, and a sealing ring is fixedly arranged in the annular groove.

[0013] Adopting the above technical solutions, the present utility model has the following advantages:

[0014] The functions of the side sliding blocks and the side sliding grooves of the present utility model enable the adjusting plate to only move up and down, so that when the first gear rotates, the threaded column cannot rotate and can only move up and down. The setting of the sealing ring strengthens the sealing between the adjusting plate and the valve cover, and can effectively prevent the leakage of the medium.

[0015] Further, the gear disc structure further includes a bottom ring disc. The bottom ring disc is fixedly connected with the valve cover by bolts. A ring sleeve is fixedly arranged at the upper end of the bottom ring disc. The upper end of the ring sleeve is inserted into the lower end of the first gear. A clamping ring is fixedly arranged on one side of the upper end of the ring sleeve. A clamping ring groove is provided at the position corresponding to the clamping ring on the first gear. The clamping ring is clamped in the clamping ring groove. A plurality of rolling grooves are provided on the side of the clamping ring away from the ring sleeve, and a plurality of rollers are rotatably arranged in each rolling groove, and the rollers are abutted against the clamping ring groove.

[0016] Adopting the above technical solutions, the present utility model has the following advantages:

[0017] The arrangement of the snap ring and roller of the present utility model enables the first gear to rotate. Since the first gear can rotate while the threaded column cannot, when the first gear rotates, the up-and-down movement of the threaded column can be controlled.

[0018] Furthermore, the control structure further includes a base. Both ends of the base are fixedly connected to the valve cover through bolts. An electric motor is fixedly provided at the upper end of the base. Side plates are fixedly provided on both sides of the electric motor at the upper end of the base. A top plate is fixedly provided at the upper end of the side plates. The output end of the electric motor passes through the top plate and is fixedly connected to the second gear.

[0019] Adopting the above technical solutions, the present utility model has the following advantages:

[0020] The arrangement of the electric motor of the present utility model functions to drive the second gear to rotate, thereby driving the first gear to rotate, eliminating the need for manual rotation, which saves time and effort.

[0021] Furthermore, the buffer structure includes a buffer ring. An annular groove is provided at the upper end of the valve seat. The buffer ring is clamped in the annular groove. A plurality of second springs are fixedly provided between the buffer ring and the annular groove. Limiting portions are fixedly provided on both sides at the lower end of the buffer ring. Limiting grooves are communicated at both ends of the annular groove. The limiting portions are clamped in the corresponding limiting grooves.

[0022] Adopting the above technical solutions, the present utility model has the following advantages:

[0023] The arrangement of the buffer ring, second springs and limiting portions of the present utility model enables the buffer ring to be extruded out of the annular groove by the elastic force of the second springs when the valve core moves upward away from the valve seat. When the valve core returns to its position, the valve core first contacts the buffer ring. When it is further pressed downward, the elastic force of the second springs can relieve the downward impact force of the valve core, thereby reducing the impact between the valve core and the valve seat, playing a role in extending the service life of the valve core and the valve seat, and effectively extending the service life of the present utility model.

[0024] Furthermore, a plurality of first sealing ring grooves are communicated at positions of the valve body corresponding to the valve cavity. Sealing rings one are clamped in the first sealing ring grooves. A plurality of third springs are fixedly provided between the sealing rings one and the first sealing ring grooves. The inner rings of the sealing rings one are abutted against the valve core.

[0025] Adopting the above technical solutions, the present utility model has the following advantages:

[0026] The arrangement of the sealing rings one of the present utility model functions to strengthen the sealing between the valve body and the valve core. The arrangement of the third springs further strengthens the sealing between the valve body and the valve core, and can effectively prevent medium leakage.

[0027] Further, a second sealing ring groove is provided at the lower end of the valve cover, and a third sealing ring groove corresponding to the second sealing ring groove is provided at the upper end of the valve body. A second sealing ring and a third sealing ring are respectively arranged in the second sealing ring groove and the third sealing ring groove. A plurality of protruding ring portions are fixedly arranged at the lower end of the second sealing ring, and inner concave ring portions corresponding to the protruding ring portions are arranged in the third sealing ring. The protruding ring portions are clamped in the corresponding inner concave ring portions.

[0028] Adopting the above technical solutions, the present utility model has the following advantages:

[0029] The arrangement of the second sealing ring and the third sealing ring of the present utility model plays a role in strengthening the sealing performance between the valve cover and the valve body. The arrangement of the protruding ring portions and the inner concave ring portions further strengthens the sealing performance between the valve cover and the valve body, and can effectively prevent the leakage of the medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present utility model will be further described below with reference to the drawings and embodiments.

[0031] Figure 1 is a schematic cross-sectional structure diagram of the present utility model;

[0032] Figure 2 is of the present utility model Figure 1 an enlarged structural diagram of part A therein;

[0033] Figure 3 is of the present utility model Figure 1 an enlarged structural diagram of part B therein;

[0034] Figure 4 is of the present utility model Figure 1 an enlarged structural diagram of part C therein.

[0035] Reference numerals: 1, valve body; 101, inflow channel; 102, outflow channel; 103, valve cavity; 104, pressure relief channel; 2, first sealing ring groove; 201, third spring; 202, first sealing ring; 3, first spring; 301, fixing plate; 4, second sealing ring; 401, protruding ring portion; 5, third sealing ring; 501, inner concave ring portion; 6, valve cover; 601, side sliding groove; 7, adjusting plate; 701, side slider; 702, annular groove; 703, sealing ring; 8, buffer ring; 801, limiting portion; 9, valve seat; 901, annular groove; 902, limiting groove; 10, threaded column; 11, handle; 12, embedded groove; 13, valve core; 14, second sealing ring groove; 15, second gear; 16, top plate; 17, motor; 18, side plate; 19, base; 20, bottom ring plate; 21, snap ring; 22, roller; 23, ring sleeve; 24, second spring; 25, third sealing ring groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] As Figure 1As shown, in a specific embodiment of the present invention, a pressure-adjustable spring safety valve includes a valve body 1. A valve cover 6 is fixedly provided at the upper end of the valve body 1 through bolts. A valve cavity 103 is provided inside the valve body 1. A valve core 13 is provided inside the valve cavity 103. An inflow channel 101 is communicated with the lower end of the valve cavity 103. An outflow channel 102 is provided on one side of the inflow channel 101. A pressure relief channel 104 is provided on one side of the valve cavity 103. An elastic structure is provided at the upper end of the valve core 13. An adjusting structure is provided at the upper end of the elastic structure. The adjusting structure includes a threaded column 10. An adjusting plate 7 is fixedly provided at the lower end of the threaded column 10. The upper end of the threaded column 10 penetrates through the upper end of the valve cover 6 and is threadedly connected with a gear disc structure. A handle 11 is fixedly provided at the upper end of the threaded column 10. The gear disc structure includes a first gear. The first gear is threadedly connected with the threaded column 10. A control structure is fixedly provided at the upper end of the valve cover 6 on one side of the gear disc structure. The control structure includes a second gear 15. One side of the second gear 15 is engaged with the first gear. A valve seat 9 is provided inside the valve cavity 103. A buffer structure is provided at the upper end of the valve seat 9. The valve seat 9 and the buffer structure abut against the lower end of the valve core 13.

[0037] Through the above settings, the adjusting structure and the elastic structure of the present invention are provided, so that when using the present invention, by driving the threaded column 10 to move downward, the elastic structure can be squeezed, so that the compression amount of the elastic structure can be changed, thereby realizing the function of adjusting the pressure of the safety valve; the setting of the first gear and the second gear 15 of the present invention enables the first gear to rotate when the control structure controls the second gear 15 to rotate, thereby driving the threaded column 10 to move up and down, so that manual rotation adjustment is not required and the adjustment is more convenient and easier; the setting of the buffer structure of the present invention can effectively buffer the impact force of the valve core 13 falling, so that the valve core 13 and the valve seat 9 are not easily damaged, and the service life of the safety valve is effectively extended.

[0038] As Figure 1 and Figure 3 shown, the elastic structure includes a first spring 3 and a fixing plate 301. Fixing plates 301 are provided at both the upper and lower ends of the first spring 3. Inner embedding grooves 12 are provided at the positions corresponding to the fixing plates 301 at the upper end of the valve core 13 and the lower end of the adjusting plate 7. The fixing plates 301 are clamped in the inner embedding grooves 12; side sliding blocks 701 are fixedly provided on the outer circumference of the adjusting plate 7. Side sliding grooves 601 are provided at the positions corresponding to the side sliding blocks 701 on the inner side of the valve cover 6. The side sliding blocks 701 are clamped in the side sliding grooves 601. An annular groove 702 is provided on the outer end surface of the side sliding block 701. A sealing ring 703 is fixedly provided in the annular groove 702.

[0039] With the above settings, the inner embedded groove 12 of the present utility model enables the elastic structure to be quickly positioned between the valve core 13 and the adjusting plate 7, squeezing the valve core 13, so that a certain pressure is required for the valve core 13 to move upward; the functions of the side slider 701 and the side chute 601 of the present utility model enable the adjusting plate 7 to only move up and down. Therefore, when the first gear rotates, the threaded column 10 cannot rotate and can only move up and down. The setting of the sealing ring 703 strengthens the sealing between the adjusting plate 7 and the valve cover 6, effectively preventing the leakage of the medium.

[0040] As Figure 1 and Figure 2 shown, the gear disc structure further includes a bottom ring plate 20. The bottom ring plate 20 is fixedly connected to the valve cover 6 by bolts. An annular sleeve 23 is fixedly provided at the upper end of the bottom ring plate 20. The upper end of the annular sleeve 23 is inserted into the lower end of the first gear. A snap ring 21 is fixedly provided on one side of the upper end of the annular sleeve 23. A snap ring groove is provided at the position of the first gear corresponding to the snap ring 21. The snap ring 21 is clamped in the snap ring groove. A plurality of rolling grooves are provided on the side of the snap ring 21 away from the annular sleeve 23. A plurality of rollers 22 are rotatably provided in the rolling grooves. The rollers 22 abut against the snap ring groove; the control structure further includes a base 19. The two ends of the base 19 are respectively fixedly connected to the valve cover 6 by bolts. A motor 17 is fixedly provided at the upper end of the base 19. Side plates 18 are fixedly provided on both sides of the motor 17 at the upper end of the base 19. A top plate 16 is fixedly provided at the upper end of the side plates 18. The output end of the motor 17 passes through the top plate 16 and is fixedly connected to the second gear 15.

[0041] With the above settings, the settings of the snap ring 21 and the rollers 22 of the present utility model enable the first gear to rotate. Since the first gear can rotate and the threaded column 10 cannot rotate, when the first gear rotates, the up and down movement of the threaded column 10 can be controlled; the setting of the motor 17 of the present utility model plays a role in driving the rotation of the second gear 15, thereby driving the rotation of the first gear, eliminating the need for manual rotation, saving time and effort.

[0042] As Figure 1 and Figure 4As shown in the figure, the buffer structure includes a buffer ring 8. An annular groove 901 is provided at the upper end of the valve seat 9. The buffer ring 8 is clamped in the annular groove 901. A number of second springs 24 are fixedly arranged between the buffer ring 8 and the annular groove 901. Limiting parts 801 are fixedly arranged on both sides of the lower end of the buffer ring 8. Limiting grooves 902 are communicated at both ends of the annular groove 901. The limiting parts 801 are clamped in the corresponding limiting grooves 902. At the positions corresponding to the valve cavities 103 of the valve body 1, a number of first sealing ring grooves 2 are communicated. Sealing rings 202 are clamped in the first sealing ring grooves 2. A number of third springs 201 are fixedly arranged between the sealing rings 202 and the first sealing ring grooves 2. The inner rings of the sealing rings 202 are abutted against the valve core 13. A second sealing ring groove 14 is provided at the lower end of the valve cover 6. A third sealing ring groove 25 is provided at the upper end of the valve body 1 corresponding to the second sealing ring groove 14. A second sealing ring 4 and a third sealing ring 5 are respectively arranged in the second sealing ring groove 14 and the third sealing ring groove 25. A number of protruding ring parts 401 are fixedly arranged at the lower end of the second sealing ring 4. Inner concave ring parts 501 are provided at the positions corresponding to the protruding ring parts 401 of the third sealing ring 5. The protruding ring parts 401 are clamped in the corresponding inner concave ring parts 501.

[0043] With the above settings, the buffer ring 8, the second springs 24 and the limiting parts 801 of the present utility model are arranged such that when the valve core 13 moves upward away from the valve seat 9, the elastic force of the second springs 24 can extrude the buffer ring 8 out of the annular groove 901. When the valve core 13 returns to its position, the valve core 13 first contacts the buffer ring 8. When it is pressed downward again, the elastic force of the second springs 24 can relieve the downward impact force of the valve core 13, thereby reducing the impact between the valve core 13 and the valve seat 9, playing a role in extending the service lives of the valve core 13 and the valve seat 9, and thus effectively extending the service life of the present utility model. The sealing ring 202 of the present utility model plays a role in strengthening the sealing between the valve body 1 and the valve core 13. The third springs 201 further strengthen the sealing between the valve body 1 and the valve core 13 and can effectively prevent medium leakage. The second sealing ring 4 and the third sealing ring 5 of the present utility model play a role in strengthening the sealing between the valve cover 6 and the valve body 1. The protruding ring parts 401 and the inner concave ring parts 501 further strengthen the sealing between the valve cover 6 and the valve body 1 and can effectively prevent medium leakage.

[0044] Working principle: When in use, by controlling the start of the motor 17, the second gear 15 can be driven to rotate. The second gear 15 meshes with the first gear to drive the first gear to rotate. Since the threaded column 10 is fixedly connected to the adjusting plate 7, and both sides of the adjusting plate 7 are restricted by the side sliders 701 and the side chutes 601, the adjusting plate 7 and the threaded column 10 cannot rotate. Therefore, when the first gear rotates, the threaded column 10 can move up and down. When the threaded column 10 moves downward, the adjusting plate 7 will drive the fixed plate 301 at the lower end to move downward and squeeze the first spring 3, changing the compression amount of the first spring 3, thereby playing a role in changing the pressure of the safety valve. The adjustment of the safety valve pressure can be achieved without manually rotating the threaded column 10, which is more time-saving and labor-saving. Moreover, the buffer ring 8 and the second spring 24 make it so that when the valve core 13 moves upward away from the valve seat 9, the elastic force of the second spring 24 can squeeze the buffer ring 8 out of the annular groove 901. When the valve core 13 returns to its position, the valve core 13 first contacts the buffer ring 8, and when pressing downward again, the elastic force of the second spring 24 can relieve the downward impact force of the valve core 13, thereby reducing the impact between the valve core 13 and the valve seat 9, playing a role in extending the service life of the valve core 13 and the valve seat 9, and effectively extending the service life of the present utility model. The first spring 3, the second spring 24, the third spring 201, the motor 17, the first gear, and the second gear 15 of the present utility model are all disclosed in the prior art, so no excessive elaboration is made in this application.

[0045] The above is only the preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the idea of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements should also be regarded as within the protection scope of the present utility model.

Claims

1. Adjustable pressure spring safety valve, including a valve body (1), a valve cover (6) is fixedly provided at the upper end of the valve body (1) through bolts, a valve cavity (103) is arranged inside the valve body (1), and a valve core (13) is arranged inside the valve cavity (103), characterized in that, The lower end of the valve cavity (103) is communicated with an inflow channel (101). An outflow channel (102) is arranged on one side of the inflow channel (101). A pressure relief channel (104) is arranged on one side of the valve cavity (103). An elastic structure is arranged at the upper end of the valve core (13). An adjusting structure is arranged at the upper end of the elastic structure. The adjusting structure includes a threaded column (10). A regulating plate (7) is fixedly arranged at the lower end of the threaded column (10). The upper end of the threaded column (10) penetrates through the upper end of the valve cover (6) and is threadedly connected with a gear disc structure. A handle (11) is fixedly arranged at the upper end of the threaded column (10). The gear disc structure includes a first gear. The first gear is threadedly connected with the threaded column (10). A control structure is fixedly arranged on the upper end of the valve cover (6) on one side of the gear disc structure. The control structure includes a second gear (15). One side of the second gear (15) is meshed with the first gear. A valve seat (9) is arranged in the valve cavity (103). A buffer structure is arranged at the upper end of the valve seat (9). The valve seat (9) and the buffer structure abut against the lower end of the valve core (13).

2. The adjustable pressure spring type safety valve according to claim 1, characterized in that, The elastic structure includes a first spring (3) and a fixing plate (301). The fixing plate (301) is arranged at both the upper and lower ends of the first spring (3). Embedded grooves (12) are arranged at the positions corresponding to the fixing plate (301) at the upper end of the valve core (13) and the lower end of the regulating plate (7). The fixing plate (301) is clamped in the embedded grooves (12).

3. The adjustable pressure spring type safety valve according to claim 2, characterized in that, A side slider (701) is fixedly arranged on the outer circle of the regulating plate (7). A side sliding groove (601) is arranged on the inner side of the valve cover (6) corresponding to the side slider (701). The side slider (701) is clamped in the side sliding groove (601). An annular groove (702) is arranged on the outer end face of the side slider (701). A sealing ring (703) is fixedly arranged in the annular groove (702).

4. The adjustable pressure spring safety valve according to claim 1, characterized in that, The gear disc structure further includes a bottom ring plate (20). The bottom ring plate (20) is fixedly connected with the valve cover (6) by bolts. A ring sleeve (23) is fixedly arranged at the upper end of the bottom ring plate (20). The upper end of the ring sleeve (23) is inserted into the lower end of the first gear. A snap ring (21) is fixedly arranged on one side of the upper end of the ring sleeve (23). A snap ring groove is arranged on the first gear corresponding to the snap ring (21). The snap ring (21) is clamped in the snap ring groove. A plurality of rolling grooves are arranged on the side of the snap ring (21) away from the ring sleeve (23). A plurality of rollers (22) are rotatably arranged in the rolling grooves. The rollers (22) abut against the snap ring groove.

5. The adjustable pressure spring type safety valve according to claim 4, characterized in that, The control structure further includes a base (19). The two ends of the base (19) are respectively fixedly connected with the valve cover (6) by bolts. A motor (17) is fixedly arranged at the upper end of the base (19). Side plates (18) are fixedly arranged on both sides of the motor (17) at the upper end of the base (19). A top plate (16) is fixedly arranged at the upper end of the side plates (18). The output end of the motor (17) passes through the top plate (16) and is fixedly connected with the second gear (15).

6. The adjustable pressure spring type safety valve according to claim 1, characterized in that, The buffer structure includes a buffer ring (8). An annular groove (901) is provided at the upper end of the valve seat (9). The buffer ring (8) is clamped in the annular groove (901). A number of second springs (24) are fixedly provided between the buffer ring (8) and the annular groove (901). Limiting portions (801) are fixedly provided on both sides of the lower end of the buffer ring (8). Limiting grooves (902) are communicated at both ends of the annular groove (901). The limiting portions (801) are clamped in the corresponding limiting grooves (902).

7. The adjustable pressure spring type safety valve according to claim 6, characterized in that, A number of first seal ring grooves (2) are communicated at positions of the valve body (1) corresponding to the valve cavity (103). First sealing rings (202) are clamped in the first seal ring grooves (2). A number of third springs (201) are fixedly provided between the first sealing rings (202) and the first seal ring grooves (2). The inner ring of the first sealing ring (202) abuts against the valve core (13).

8. The adjustable pressure spring type safety valve according to claim 7, characterized in that, A second seal ring groove (14) is provided at the lower end of the valve cover (6). A third seal ring groove (25) is provided at the upper end of the valve body (1) corresponding to the second seal ring groove (14). A second sealing ring (4) and a third sealing ring (5) are respectively provided in the second seal ring groove (14) and the third seal ring groove (25). A number of protruding ring portions (401) are fixedly provided at the lower end of the second sealing ring (4). Inner concave ring portions (501) are provided at positions of the third sealing ring (5) corresponding to the protruding ring portions (401). The protruding ring portions (401) are clamped in the corresponding inner concave ring portions (501).

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