CN113483181A

CN113483181A - Safety valve

Info

Publication number: CN113483181A
Application number: CN202110753940.8A
Authority: CN
Inventors: 俞平平; 傅红兵; 罗国炎; 傅红波
Original assignee: Zhejiang Fuyu Valve Manufacture Co ltd
Current assignee: Zhejiang Fuyu Valve Manufacture Co ltd
Priority date: 2021-07-04
Filing date: 2021-07-04
Publication date: 2021-10-08
Anticipated expiration: 2041-07-04
Also published as: CN113483181B

Abstract

The invention discloses a safety valve, which belongs to the technical field of safety valves and comprises an air inlet pipeline, wherein the bottom end of the air inlet pipeline is fixedly connected with a first flange, the upper end of the air inlet pipeline is communicated with symmetrically arranged air distribution pipelines, one end of each air distribution pipeline is integrally formed with a first connecting pipeline, the upper end of each first connecting pipeline is detachably provided with a second connecting pipeline, and an adjusting mechanism is arranged on each second connecting pipeline. The user can carry out regulating spring's decrement according to actual demand, and the outside of snap ring including the snap ring is established to handheld corresponding safety cover and with outer snap ring cover once more after the regulation is accomplished, the fixture block will be blocked once more at this moment and establish in L type draw-in groove, later the user need press down safety cover and antiport safety cover to the one side that is close to the second connecting tube, thereby on the snap ring including stable cover is established with the safety cover with the help of the elasticity of rubber packing ring, and then realized convenient installation and the dismantlement of safety cover, thereby the regulation for spring decrement provides convenience.

Description

Safety valve

Technical Field

The invention relates to the technical field of safety valves, in particular to a safety valve.

Background

The safety valve is a special valve which is in a normally closed state under the action of external force, and when the pressure of a medium in equipment or a pipeline rises to exceed a specified value, the medium is discharged to the outside of a system to prevent the pressure of the medium in the pipeline or the equipment from exceeding the specified value.

The safety valve that uses at present still has certain not enough, mostly pass through the bolt fastening like the safety cover that current safety valve used, when in-service use, quick convenient installation and the dismantlement safety cover of being not convenient for, thereby be not convenient for adjust spring's compressive capacity, and there is the relatively poor defect of leakproofness mostly in current safety valve, thereby safety valve's sealed effect has been reduced, and then can't ensure safety valve's normal use, furthermore, current safety valve is mostly single outlet duct and exhausts, when in-service use, in case leading-in gas is more, can cause the appearance of the untimely phenomenon of exhaust, we propose a safety valve for this reason and be used for solving above-mentioned problem.

Disclosure of Invention

In order to solve the technical problems, the invention adopts the following technical scheme: the invention provides a safety valve which comprises an air inlet pipeline, wherein a first flange is fixedly connected to the bottom end of the air inlet pipeline, a symmetrically-arranged air distribution pipeline is communicated with the upper end of the air inlet pipeline, a first connecting pipeline is integrally formed at one end of the air distribution pipeline, a second connecting pipeline is detachably arranged at the upper end of the first connecting pipeline, an adjusting mechanism is arranged on the second connecting pipeline, a protective cover matched with the adjusting mechanism is detachably arranged at the top end of the second connecting pipeline, one end of the adjusting mechanism can extend into the first connecting pipeline, a sealing mechanism matched with the adjusting mechanism is arranged in an inner cavity of the first connecting pipeline, an air outlet pipe matched with the adjusting mechanism and the sealing mechanism is fixedly mounted on the first connecting pipeline, and a fourth flange is integrally formed at one end of the air outlet pipe.

Preferably, the adjusting mechanism comprises an adjusting screw rod, the adjusting screw rod is rotatably inserted on the second connecting pipeline, one end of the adjusting screw rod penetrates through the second connecting pipeline and is fixedly connected with an adjusting runner at the tail end of the second connecting pipeline, the other end of the adjusting screw rod is in threaded sleeve connection with a threaded sleeve, a moving ring is fixedly sleeved in the middle of the outer side of the threaded sleeve, the moving ring is slidably clamped in an inner cavity of the second connecting pipeline, a telescopic rod is fixedly mounted at the bottom end of the threaded sleeve, a moving disc is fixedly connected with one end of the telescopic rod and is slidably clamped in the inner cavity of the second connecting pipeline, a spring is fixedly connected at the upper end of the moving disc, the spring is movably sleeved on the outer side of the telescopic rod, one end of the spring is fixedly connected with the threaded sleeve, a vertical rod is fixedly mounted at the lower end of the moving disc, and a sealing cap is fixedly sleeved on the vertical rod, the special-shaped sealing groove is formed in the side wall of the inner cavity of the sealing cap, the sealing disc is fixedly mounted at the bottom end of the vertical rod, and the rubber sealing pad is integrally formed at the lower end of the sealing disc.

Preferably, sealing mechanism includes baffle and sealing member, the outer wall of baffle and the inner chamber lateral wall fixed connection of first connecting tube, and run through on the baffle and set up the inlet port that is linked together with dividing the trachea way, the sealed bottom of rubber packing can with baffle in close contact with, and the sealed external diameter of rubber packing is greater than the internal diameter of inlet port, sealing member fixed mounting is at the inner chamber lower extreme of first connecting tube, and sealed dish can slide and insert and establish in the sealing member, the top integrated into one piece of sealing member has the sealing ring, and fixed mounting has special-shaped sealing washer on the outer wall of sealing ring, the sealing ring can slide and insert and establish in sealed cap, and special-shaped sealing washer can the activity card establish in special-shaped sealing groove.

Preferably, the bottom integrated into one piece of safety cover has outer snap ring, the inboard fixed mounting of outer snap ring has the fixture block of array distribution, the interior snap ring that top fixedly connected with and the cooperation of outer snap ring of second connecting tube used, set up the L type draw-in groove of array distribution on the outer wall of interior snap ring, the outside of snap ring including outer snap ring can the movable sleeve establish, and the fixture block can slide the card and establish in L type draw-in groove, the outside lower extreme fixed mounting of interior snap ring has the rubber packing ring, the bottom of outer snap ring can contact with the rubber packing ring.

Preferably, first connecting tube's top integrated into one piece has the second flange, second connecting tube's bottom integrated into one piece has the third flange that uses with the cooperation of second flange, second annular seal groove has been seted up to one side of third flange, and integrated into one piece has second ring seal on the third flange, first annular seal groove has been seted up to one side of second flange, and integrated into one piece has first ring seal on the second flange, first ring seal can the activity card establish in second annular seal groove, and second ring seal can the activity card establish in first annular seal groove.

Preferably, the outside fixedly connected with symmetry of shift ring sets up first slider, set up the first spout of symmetric distribution on the lateral wall of second connecting tube inner chamber upper end, first slider slip card is established in first spout, and the length of first slider is less than the length of first spout.

Preferably, the outer wall of the movable disk is integrally formed with second sliding blocks distributed in a mirror image manner, the side wall of the lower end of the inner cavity of the second connecting pipeline is provided with second sliding grooves distributed symmetrically, the second sliding blocks are slidably clamped in the second sliding grooves, and the length of the second sliding blocks is smaller than that of the second sliding grooves.

The invention has the beneficial effects that:

1. during the use, the user can hold two sets of safety covers in proper order and press to the one side that is close to the second connecting tube, the rotatable safety cover of later user, thereby drive the fixture block and slide in L type draw-in groove, later user can take off the safety cover, then the user can carry out adjusting spring's decrement according to actual demand, and the outside of snap ring including the handheld corresponding safety cover once more and establishing outer snap ring cover after adjusting the completion, the fixture block will be blocked once more and establish in L type draw-in groove this moment, later user need press down safety cover and reverse rotation safety cover to the one side that is close to the second connecting tube, thereby on the snap ring including stable the cover is established to the elasticity with the help of rubber packing ring, and then realized convenient installation and the dismantlement of safety cover, thereby provide convenience for the regulation of spring decrement.

2. The user can carry out adjusting spring's decrement according to the in-service use demand, the rotatable regulation runner of user this moment, thereby drive adjusting screw and rotate, and then drive the shift ring downstream through threaded sleeve, thereby the extrusion spring, when spring decrement transfers to loosen the regulation runner when suitable size, the sealed pad of rubber will closely laminate on the baffle this moment, and sealing ring and special-shaped sealing washer will block respectively in sealing cap and special-shaped seal groove, thereby effectively improved the leakproofness of branch pipeline and first connecting pipeline intercommunication department, and then improved safety valve's sealed effect, thereby normal use for safety valve provides the guarantee.

3. During follow-up use, when getting into more gas in the admission line, in the even leading-in two-component gas pipeline, when atmospheric pressure in the admission line reached certain numerical value, will promote the sealed pad of rubber to shift up, thereby drive sealed cap through the montant and shift up, and then make sealing ring and sealed cap separation, dysmorphism sealing washer and the separation of dysmorphism seal groove, thereby can be with the gas in the gas pipeline of branch in leading-in first connecting tube of inlet port, and discharge by the outlet duct, thereby the purpose of the synchronous discharge gas of two sets of outlet ducts has been realized, and then the normal clear of exhaust operation has been ensured, the untimely phenomenon of exhaust is avoided appearing.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a safety valve according to an embodiment of the present invention.

FIG. 2 is a schematic view of the connection structure of the present invention;

FIG. 3 is an enlarged structural view of the structure at A in FIG. 2 according to the present invention;

FIG. 4 is an enlarged structural view of the structure at B in FIG. 2 according to the present invention;

FIG. 5 is an enlarged structural view of the structure at C in FIG. 2 according to the present invention;

fig. 6 is an enlarged structural view of the structure at D in fig. 2 according to the present invention.

Description of reference numerals: 1. an air intake duct; 11. a first flange; 2. a gas distribution pipeline; 3. a first connecting pipe; 31. a second flange; 32. a first annular seal groove; 33. a first annular seal ring; 4. a second connecting pipe; 41. an inner snap ring; 42. an L-shaped clamping groove; 43. a rubber gasket; 44. a third flange; 45. a second annular seal groove; 46. a second annular seal ring; 47. a first chute; 48. a second chute; 5. an adjustment mechanism; 51. adjusting the screw rod; 52. adjusting the rotating wheel; 53. a threaded sleeve; 54. a moving ring; 55. a telescopic rod; 56. a movable tray; 57. a spring; 58. a vertical rod; 59. a sealing cap; 510. a special-shaped sealing groove; 511. sealing the disc; 512. a rubber gasket; 513. a first slider; 514. a second slider; 6. a protective cover; 61. an outer snap ring; 62. a clamping block; 7. a sealing mechanism; 71. a partition plate; 72. a seal member; 73. an air inlet; 74. a seal ring; 75. a special-shaped sealing ring; 8. an air outlet pipe; 81. and a fourth flange.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): as shown in fig. 1 to 6, the present invention provides a safety valve, which comprises an air inlet pipe 1, a first flange 11 fixedly connected to the bottom end of the air inlet pipe 1, a symmetrically arranged air distribution pipe 2 communicated with the upper end of the air inlet pipe 1, a first connecting pipe 3 integrally formed at one end of the air distribution pipe 2, a second connecting pipe 4 detachably disposed at the upper end of the first connecting pipe 3, an adjusting mechanism 5 disposed on the second connecting pipe 4, a protecting cover 6 detachably disposed at the top end of the second connecting pipe 4 and used in cooperation with the adjusting mechanism 5, one end of the adjusting mechanism 5 extending into the first connecting pipe 3, a sealing mechanism 7 disposed in the inner cavity of the first connecting pipe 3 and used in cooperation with the adjusting mechanism 5, an air outlet pipe 8 fixedly disposed on the first connecting pipe 3 and used in cooperation with the adjusting mechanism 5 and the sealing mechanism 7, and a fourth flange 81 integrally formed at one end of the air outlet pipe 8, the first flange 11 and the fourth flange 81 are arranged for use, and convenience is provided for installation and connection of the safety valve.

Further, the adjusting mechanism 5 comprises an adjusting screw 51, the adjusting screw 51 is rotatably inserted into the second connecting pipe 4, one end of the adjusting screw 51 penetrates through the second connecting pipe 4 and is fixedly connected with an adjusting rotating wheel 52 at the end thereof, the other end of the adjusting screw 51 is in threaded sleeve connection with a threaded sleeve 53, a moving ring 54 is fixedly sleeved in the middle of the outer side of the threaded sleeve 53, the moving ring 54 is slidably clamped in the inner cavity of the second connecting pipe 4, an expansion link 55 is fixedly installed at the bottom end of the threaded sleeve 53, one end of the expansion link 55 is fixedly connected with a moving disc 56, the moving disc 56 is slidably clamped in the inner cavity of the second connecting pipe 4, a spring 57 is fixedly connected to the upper end of the moving disc 56, the spring 57 is movably sleeved on the outer side of the expansion link 55, one end of the spring 57 is fixedly connected with the threaded sleeve 53, the expansion link 55 is used, and a guarantee is provided for the stability of the contraction and extension of the spring 57, the lower extreme fixed mounting of removal dish 56 has montant 58, and the fixed cover is equipped with sealed cap 59 on montant 58, has seted up special-shaped seal groove 510 on the inner chamber lateral wall of sealed cap 59, and the bottom fixed mounting of montant 58 has sealed dish 511, and the lower extreme integrated into one piece of sealed dish 511 has rubber packing pad 512.

Further, the sealing mechanism 7 includes a partition plate 71 and a sealing member 72, an outer wall of the partition plate 71 is fixedly connected with a side wall of an inner cavity of the first connecting pipe 3, an air inlet 73 communicated with the air distribution pipe 2 is formed through the partition plate 71, a bottom end of the rubber sealing pad 512 can be in close contact with the partition plate 71, an outer diameter of the rubber sealing pad 512 is larger than an inner diameter of the air inlet 73, so that the rubber sealing pad 512 can seal the air inlet 73, the air distribution pipe 2 can be separated from the first connecting pipe 3, the sealing member 72 is fixedly installed at a lower end of the inner cavity of the first connecting pipe 3, the sealing plate 511 can be slidably inserted into the sealing member 72, a sealing ring 74 is integrally formed at a top end of the sealing member 72, a special-shaped sealing ring 75 is fixedly installed on an outer wall of the sealing ring 74, the special-shaped sealing ring 74 can be slidably inserted into the sealing cap 59, and the sealing ring 75 can be movably clamped in the special-shaped sealing groove 510, therefore, the sealing performance of the joint of the gas distribution pipeline 2 and the first connecting pipeline 3 is further ensured by matching the special-shaped sealing ring 75 with the special-shaped sealing groove 510.

Further, the bottom integrated into one piece of safety cover 6 has outer snap ring 61, the inboard fixed mounting of outer snap ring 61 has the fixture block 62 of array distribution, the interior snap ring 41 that top fixedly connected with and the cooperation of outer snap ring 61 of second connecting tube 4 used, set up the L type draw-in groove 42 of array distribution on the outer wall of interior snap ring 41, the outside of snap ring 41 including outer snap ring 61 can movable sleeve establishes, and fixture block 62 can slide the card and establish in L type draw-in groove 42, the outside lower extreme fixed mounting of interior snap ring 41 has rubber packing ring 43, the bottom of outer snap ring 61 can contact with rubber packing ring 43, rubber packing ring 43 sets up the use, can provide an ascending thrust to outer snap ring 61, thereby ensure the stability of joint between outer snap ring 61 and the interior snap ring 41.

Further, a second flange 31 is integrally formed at the top end of the first connection pipeline 3, a third flange 44 used in cooperation with the second flange 31 is integrally formed at the bottom end of the second connection pipeline 4, the second flange 31 and the third flange 44 can be fixed by bolts and nuts, which is the prior art and will not be described herein, a second annular seal groove 45 is formed at one side of the third flange 44, a second annular seal ring 46 is integrally formed on the third flange 44, a first annular seal groove 32 is formed at one side of the second flange 31, a first annular seal ring 33 is integrally formed on the second flange 31, the first annular seal ring 33 can be movably clamped in the second annular seal groove 45, the second annular seal ring 46 can be movably clamped in the first annular seal groove 32, the first annular seal ring 33 and the second annular seal groove 45 are used in cooperation, and the second annular seal ring 46 and the first annular seal groove 32 are used in cooperation, the sealing performance of the joint of the second flange 44 and the third flange 31 is effectively improved, so that the normal use of the safety valve is ensured.

Further, the first slider 513 that the outside fixedly connected with symmetry of shift ring 54 set up, set up the first spout 47 of symmetric distribution on the lateral wall of second connecting tube 4 inner chamber upper end, first slider 513 slide card is established in first spout 47, use through the cooperation of first slider 513 with first spout 47, spacing and guide effect have been played in the removal regulation to shift ring 54, and the length of first slider 513 is less than the length of first spout 47, thereby ensure that first slider 513 can normally slide.

Further, integrated into one piece has the second slider 514 of mirror image distribution on the outer wall of removal dish 56, set up the second spout 48 of symmetric distribution on the lateral wall of second connecting tube 4 inner chamber lower extreme, the slip card of second slider 514 is established in second spout 48, use through the cooperation of second slider 514 with second spout 48, it is spacing and guide effect to have played in the removal regulation of removal dish 56, and the length of second slider 514 is less than the length of second spout 48, thereby ensure that second slider 514 can normally slide.

When the safety valve is used, a user installs the safety valve at a proper position through the first flange 11 and the fourth flange 81, then the user can hold two groups of protection covers 6 in sequence and press the protection covers to one side close to the second connecting pipeline 4, then the user can rotate the protection covers 6 to drive the fixture blocks 62 to slide in the L-shaped clamping grooves 42, then the user can take down the protection covers 6, then the user can adjust the compression amount of the spring 57 according to the actual use requirement, at the moment, the user can rotate the adjusting rotating wheel 52 to drive the adjusting screw 51 to rotate, further, the moving ring 54 is driven to move downwards through the threaded sleeve 53 to extrude the spring 57, the adjusting rotating wheel 52 is loosened when the compression amount of the spring 57 is adjusted to a proper size, at the moment, the rubber sealing gasket 512 is tightly attached to the partition plate 71, and the special-shaped sealing ring 74 and the special-shaped sealing ring 75 are respectively clamped in the sealing cap 59 and the sealing groove 510, thereby effectively improving the sealing performance of the communication part of the gas distribution pipeline 2 and the first connecting pipeline 3, further improving the sealing effect of the safety valve, thereby providing a guarantee for the normal use of the safety valve, then a user can hold the corresponding protective cover 6 again and sleeve the outer snap ring 61 on the outer side of the inner snap ring 41, at the moment, the clamping block 62 is clamped in the L-shaped clamping groove 42 again, then the user needs to press the protective cover 6 to one side close to the second connecting pipeline 4 and rotate the protective cover 6 reversely, thereby stably sleeving the protective cover 6 on the inner snap ring 41 by means of the elasticity of the rubber gasket 43, further realizing the convenient installation and disassembly of the protective cover 6, thereby providing convenience for the adjustment of the compression amount of the spring 57, when the compression amount of the spring 57 is adjusted to a proper size, the safety valve can be normally used for operation, during the subsequent use, when more gas enters the gas inlet pipeline 1, in will even leading-in two sets of gas pipelines 2 that divide, when atmospheric pressure in the admission line 1 reaches certain numerical value, will promote the sealed 512 of rubber packing to shift up, thereby it shifts up to drive sealed cap 59 through montant 58, and then make sealing ring 74 and sealed cap 59 separation, dysmorphism sealing washer 75 and dysmorphism seal groove 510 separation, thereby can pass through the leading-in first connecting pipe 3 of inlet port 73 with the gas in the gas pipeline 2 that divides, and discharge by outlet duct 8, thereby the purpose of the synchronous discharge gas of two sets of outlet ducts 8 has been realized, and then ensured the normal clear of exhaust operation, avoid appearing the untimely phenomenon of exhaust.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A safety valve comprising an air intake duct (1), characterized in that: the bottom end of the air inlet pipeline (1) is fixedly connected with a first flange (11), the upper end of the air inlet pipeline (1) is communicated with a symmetrically arranged air distribution pipeline (2), one end of the air distribution pipeline (2) is integrally formed to be provided with a first connecting pipeline (3), the upper end of the first connecting pipeline (3) is detachably provided with a second connecting pipeline (4), the second connecting pipeline (4) is provided with an adjusting mechanism (5), the top end of the second connecting pipeline (4) is detachably provided with a protective cover (6) matched with the adjusting mechanism (5) for use, one end of the adjusting mechanism (5) can extend into the first connecting pipeline (3), a sealing mechanism (7) matched with the adjusting mechanism (5) for use is arranged in the inner cavity of the first connecting pipeline (3), the first connecting pipeline (3) is fixedly provided with an air outlet pipe (8) matched with the adjusting mechanism (5) and the sealing mechanism (7) for use, and a fourth flange (81) is integrally formed at one end of the air outlet pipe (8).

2. The safety valve according to claim 1, wherein the adjusting mechanism (5) comprises an adjusting screw (51), the adjusting screw (51) is rotatably inserted into the second connecting pipe (4), one end of the adjusting screw (51) penetrates through the second connecting pipe (4) and is fixedly connected with an adjusting rotating wheel (52) at the end thereof, the other end of the adjusting screw (51) is in threaded sleeve connection with a threaded sleeve (53), a moving ring (54) is fixedly sleeved in the middle of the outer side of the threaded sleeve (53), the moving ring (54) is slidably clamped in the inner cavity of the second connecting pipe (4), a telescopic rod (55) is fixedly installed at the bottom end of the threaded sleeve (53), a moving disc (56) is fixedly connected to one end of the telescopic rod (55), and the moving disc (56) is slidably clamped in the inner cavity of the second connecting pipe (4), and remove upper end fixedly connected with spring (57) of dish (56), spring (57) activity is cup jointed in the outside of telescopic link (55), and the one end and threaded sleeve (53) fixed connection of spring (57), the lower extreme fixed mounting of removing dish (56) has montant (58), fixed cover is equipped with sealed cap (59) on montant (58), dysmorphism seal groove (510) have been seted up on the inner chamber lateral wall of sealed cap (59), the bottom fixed mounting of montant (58) has sealed dish (511), the lower extreme integrated into one piece of sealed dish (511) has rubber packing pad (512).

3. The safety valve according to claim 2, wherein the sealing mechanism (7) comprises a partition plate (71) and a sealing element (72), the outer wall of the partition plate (71) is fixedly connected with the side wall of the inner cavity of the first connecting pipeline (3), an air inlet hole (73) communicated with the air distribution pipeline (2) is formed in the partition plate (71) in a penetrating manner, the bottom end of the rubber sealing gasket (512) can be in tight contact with the partition plate (71), the outer diameter of the rubber sealing gasket (512) is larger than the inner diameter of the air inlet hole (73), the sealing element (72) is fixedly installed at the lower end of the inner cavity of the first connecting pipeline (3), the sealing disc (511) can be inserted into the sealing element (72) in a sliding manner, the top end of the sealing element (72) is integrally formed with a sealing ring (74), and the outer wall of the sealing ring (74) is fixedly installed with a special-shaped sealing ring (75), the sealing ring (74) can be inserted into the sealing cap (59) in a sliding mode, and the special-shaped sealing ring (75) can be movably clamped in the special-shaped sealing groove (510).

4. The safety valve according to claim 1, wherein an outer snap ring (61) is integrally formed at the bottom end of the protective cover (6), the clamping blocks (62) distributed in an array are fixedly mounted on the inner side of the outer snap ring (61), an inner snap ring (41) matched with the outer snap ring (61) for use is fixedly connected to the top end of the second connecting pipe (4), L-shaped clamping grooves (42) distributed in an array are formed in the outer wall of the inner snap ring (41), the outer snap ring (61) can be movably sleeved on the outer side of the inner snap ring (41), the clamping blocks (62) can be slidably clamped in the L-shaped clamping grooves (42), a rubber gasket (43) is fixedly mounted at the lower end of the outer snap ring (41), and the bottom end of the outer snap ring (61) can be in contact with the rubber gasket (43).

5. The safety valve according to claim 1, wherein a second flange (31) is integrally formed at the top end of the first connecting pipe (3), a third flange (44) used in cooperation with the second flange (31) is integrally formed at the bottom end of the second connecting pipe (4), a second annular sealing groove (45) is formed in one side of the third flange (44), a second annular sealing ring (46) is integrally formed on the third flange (44), a first annular sealing groove (32) is formed in one side of the second flange (31), a first annular sealing ring (33) is integrally formed on the second flange (31), the first annular sealing ring (33) can be movably clamped in the second annular sealing groove (45), and the second annular sealing ring (46) can be movably clamped in the first annular sealing groove (32).

6. The safety valve according to claim 2, wherein the outer side of the moving ring (54) is fixedly connected with first sliding blocks (513) which are symmetrically arranged, the side wall of the upper end of the inner cavity of the second connecting pipeline (4) is provided with first sliding grooves (47) which are symmetrically distributed, the first sliding blocks (513) are slidably clamped in the first sliding grooves (47), and the length of the first sliding blocks (513) is smaller than that of the first sliding grooves (47).

7. The safety valve according to claim 2, wherein the outer wall of the moving plate (56) is integrally formed with second sliding blocks (514) distributed in a mirror image manner, the side wall of the lower end of the inner cavity of the second connecting pipeline (4) is provided with second sliding grooves (48) distributed symmetrically, the second sliding blocks (514) are slidably clamped in the second sliding grooves (48), and the length of the second sliding blocks (514) is smaller than that of the second sliding grooves (48).