CN217751291U

CN217751291U - Large-caliber spring type safety valve dismounting tool

Info

Publication number: CN217751291U
Application number: CN202221424553.6U
Authority: CN
Inventors: 赵兵; 胡涛; 邱舸
Original assignee: Zhejiang Zhengneng Electric Power Engineering Technology Co ltd
Current assignee: Zhejiang Zhengneng Electric Power Engineering Technology Co ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-11-08
Anticipated expiration: 2032-06-02

Abstract

The utility model relates to a heavy-calibre spring relief valve assembly and disassembly tools. It pops out easily spare part when having solved among the prior art relief valve and dismantling, the not good problem of security. It is including setting up the pneumatic cylinder in the safety valve seat upper end, be equipped with the linkage pull rod in the pneumatic cylinder, link to each other through grafting coupling mechanism between linkage pull rod and the valve rod of wearing to establish on the safety valve seat, and grafting coupling mechanism circumference is equipped with separation spacing ring body, and separation spacing ring body is with inboard division of pneumatic cylinder circumference for linkage cavity and hydraulic pressure cavity, and hydraulic pressure cavity and outside hydraulic pump link to each other, and the linkage cavity is connected with outside supercharged air pump, is equipped with elasticity roof pressure structure between pneumatic cylinder and the safety valve seat. The utility model has the advantages that: when the assembly and disassembly are carried out, the parts are not easy to pop up, and the use safety is good.

Description

Large-caliber spring type safety valve dismounting tool

Technical Field

The utility model relates to a relief valve technical field, concretely relates to heavy-calibre spring relief valve assembly and disassembly tools.

Background

The safety valve is mainly used in boiler, pressure container and pipeline, and has important protection effect on human body safety and equipment operation. The opening and closing part of the safety valve is in a normally closed state under the action of external force, and when the pressure of the medium in the equipment or the pipeline rises to exceed a specified value, the medium is discharged outside the system to prevent the pressure of the medium in the pipeline or the equipment from exceeding the specified value. And the safety protection function is realized in the system. When the system pressure exceeds the specified value, the safety valve is opened to discharge a part of gas/fluid in the system to the outside of the atmosphere/pipeline, so that the system pressure does not exceed the allowable value, and the system is ensured not to have accidents due to overhigh pressure. When the safety valve is used normally and checked, various faults can be caused due to improper design, manufacture or use, the faults can not be eliminated in time, the efficacy and the service life of the safety valve can be influenced, and the life safety of a user can be endangered in serious cases; in addition, current relief valve dismouting only depends on tools such as general spanner and hammer and hardly demolish the nut on the relief valve rod, wastes time and energy, also can cause the part to pop out because of exerting oneself too greatly when dismantling valve rod nut sometimes, leads to the maintenance personal injury, and the safety in utilization is not good.

In order to solve the defects of the prior art, people have long searched for and put forward various solutions. For example, chinese patent document discloses a safety valve mounting and dismounting tool [201621263433.7], which comprises a yoke, a valve stem and a spring arranged on the valve stem, wherein the mounting and dismounting tool is used in cooperation with the safety valve, and the mounting and dismounting tool comprises: the hydraulic cylinder is of a hollow structure, the pull rod can penetrate through the hollow structure of the hydraulic cylinder to be fixedly connected with the valve rod, when the hydraulic cylinder is used, one end of the hydraulic cylinder is placed on the yoke, and the other end of the hydraulic cylinder is provided with the pull rod.

Above-mentioned scheme has solved to a certain extent that the relief valve frequently breaks down when daily use among the prior art, influences the problem of result of use, but this scheme still has a great deal of not enough, for example: parts are easy to pop up when the safety valve is disassembled and assembled, so that maintenance personnel are injured, and the use safety is poor.

Disclosure of Invention

The utility model aims at the above-mentioned problem, provide a reasonable in design, safe in utilization's heavy-calibre spring relief valve assembly and disassembly tools.

In order to achieve the above purpose, the utility model adopts the following technical proposal: this heavy-calibre spring relief valve assembly and disassembly tools, including setting up the pneumatic cylinder in the disk seat upper end, be equipped with the linkage pull rod in the pneumatic cylinder, the linkage pull rod links to each other through grafting coupling mechanism with wearing to establish between the valve rod on the disk seat, and grafting coupling mechanism circumference is equipped with spacing ring body of separation, spacing ring body of separation is divided into linkage cavity and hydraulic cavity with pneumatic cylinder circumference inboard, and hydraulic cavity links to each other with outside hydraulic pump, the linkage cavity is connected with outside booster pump, be equipped with elasticity roof pressure structure between pneumatic cylinder and the disk seat. Through set up the pneumatic cylinder on the safety valve seat, and utilize grafting link gear to connect linkage pull rod and valve rod, during the dismantlement, outside hydraulic pump work, make the pressure boost of hydraulic cavity, the pneumatic cylinder moves down, the linkage pull rod moves down with the valve rod is synchronous, make the backup ring form the extrusion to the spring, can dismantle the nut of both sides sealed lid this moment, during the installation, outside pneumatic cylinder is to hydraulic cavity pressure release, outside pressure boost pump is to the pressure boost of linkage cavity, the linkage rod drives the valve rod and shifts up, and elasticity roof pressure structure forms the roof pressure to the pneumatic cylinder bottom, thereby make the backup ring support with the sealed lid of safety valve seat and lean on and form the roof pressure through the spring, thereby the recovery is sealed, the safety in utilization is good.

In the assembling and disassembling tool for the large-caliber spring type safety valve, the hydraulic cylinder is of a split structure and comprises an upper moving cylinder body and a lower linkage cylinder body, and the upper moving cylinder body is connected with the lower linkage cylinder body through an inserting structure.

In the above-mentioned heavy-calibre spring relief valve assembly and disassembly tools, the grafting structure is including setting up the grafting ring body on last removal cylinder body, and links down and be equipped with the connecting slot that can supply the grafting ring body to insert on the cylinder body circumference inboard down. The arrangement of the inserting structure enables linkage and disassembly between the upper moving cylinder body and the lower linkage cylinder body to be more convenient.

In foretell heavy-calibre spring relief valve assembly and disassembly tools, elasticity roof pressure structure is equipped with the roof pressure cushion including setting up the last annular constant head tank of grafting ring body bottom down on the disk seat, and is equipped with down annular constant head tank on the roof pressure cushion, is equipped with the roof pressure spring on the valve rod, and roof pressure spring one end acts on last annular constant head tank, and the other end acts on annular constant head tank down. The hydraulic cylinder can be quickly reset by the aid of the jacking spring.

In the large-caliber spring type safety valve assembling and disassembling tool, the jacking cushion block is connected with the upper end face of the safety valve seat, the middle part of the jacking cushion block is provided with a penetrating hole for the valve rod to penetrate through, and a movable gap is arranged between the circumferential direction of the penetrating hole and the valve rod. The arrangement is convenient for the lifting of the valve rod and can not generate lifting resistance.

In foretell heavy-calibre spring relief valve assembly and disassembly tools, the one end of the linkage pull rod down of upper shift cylinder body orientation just is located insert ring body circumference inboard and is equipped with linkage portion, and linkage portion tip supports to lean on and sets up at spacing ring body up end of separation, and the insert ring body circumference inboard of lower linkage cylinder body has the spacing portion of annular, and the spacing ring body of separation sets up on the spacing portion of annular. The hydraulic rod can be quickly driven to move by the hydraulic rod when the pressure of the hydraulic cavity and the linkage cavity changes.

In foretell heavy-calibre spring relief valve assembly and disassembly tools, grafting coupling mechanism is equipped with the threaded connection cylinder including setting up the threaded connection groove at linkage pull rod tip on the valve rod, and threaded connection cylinder one end sets up in the threaded connection groove, and valve rod and linkage pull rod circumference outside link to each other through the threaded connection barrel.

In foretell heavy-calibre spring relief valve assembly and disassembly tools, the threaded connection barrel includes body of rod connecting portion, and body of rod connecting portion link to each other with the linkage pull rod, and body of rod connecting portion one end is equipped with valve rod connecting portion, and valve rod connecting portion link to each other with the valve rod. The valve rod and the linkage pull rod can synchronously move by being in threaded connection with the cylinder body.

In foretell heavy-calibre spring relief valve assembly and disassembly tools, the diameter of body of rod connecting portion is greater than the diameter of valve rod connecting portion, and spacing ring body circumference of separation is inside and valve rod connecting portion circumference closely laminates, and the lower extreme of body of rod connecting portion supports to lean on the setting at spacing ring body up end of separation.

In the dismounting tool for the large-caliber spring type safety valve, the upper end of the linkage pull rod is exposed out of the hydraulic cylinder, the locking nut is sleeved on the circumferential outer side of the linkage pull rod, one end of the valve rod is arranged in the safety valve seat, the spring is sleeved on the circumferential end, located in the safety valve seat, of the valve rod, and the valve rod is provided with the supporting ring used for jacking the spring. The supporting ring can extrude the spring, the jacking acting force of the spring is removed, and the sealing cover body is convenient to detach.

Compared with the prior art, the utility model has the advantages of: reasonable in design, simple structure use the grafting coupling mechanism in the pneumatic cylinder to connect linkage pull rod and valve rod to realize the extrusion and the reseing to the spring through the pressure boost and the pressure release to linkage cavity and hydraulic cavity, make the gland bonnet body that is located on the disk seat of safety lose the roof pressure effort of spring, the nut of the valve rod both sides of being convenient for is dismantled, avoids popping out and causes the injury, and the safety in utilization is good.

Drawings

Fig. 1 is a sectional view of the overall structure of the present invention;

fig. 2 is an exploded view of the hydraulic cylinder of the present invention;

fig. 3 is a schematic view of the bottom structure of the lower linkage cylinder body in the present invention;

fig. 4 is a schematic structural view of the threaded connection cylinder of the present invention;

fig. 5 is a schematic view of the linkage rod body of the present invention.

In the figure, a relief valve seat 1, a valve rod 11, a spring 12, a supporting ring 13, a hydraulic cylinder 2, a linkage cavity 21, a hydraulic cavity 22, an upper moving cylinder 23, a linkage part 231, a lower linkage cylinder 24, an annular limiting part 241, a locking nut 25, an external booster pump 26, an external hydraulic pump 27, a linkage pull rod 3, a plug connection mechanism 4, a threaded connection groove 41, a threaded connection cylinder 42, a threaded connection cylinder 43, a rod body connection part 431, a valve rod connection part 432, a blocking limiting ring body 5, an elastic jacking structure 6, an upper annular positioning groove 61, a jacking cushion block 62, a lower annular positioning groove 63, a jacking spring 64, a plug connection structure 7, a plug connection ring body 71, a connection slot 72 and a sealing cover body 8.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-5, the dismounting tool for the large-caliber spring-type safety valve comprises a hydraulic cylinder 2 arranged at the upper end of a safety valve seat 1, a linkage pull rod 3 is arranged in the hydraulic cylinder 2, the linkage pull rod 3 is connected with a valve rod 11 penetrating through the safety valve seat 1 through a plug connection mechanism 4, a separation limiting ring body 5 is circumferentially arranged on the plug connection mechanism 4, the separation limiting ring body 5 divides the circumferential inner side of the hydraulic cylinder 2 into a linkage cavity 21 and a hydraulic cavity 22, the hydraulic cavity 22 is connected with an external hydraulic pump 27, the linkage cavity 21 is connected with an external booster pump 26, and an elastic jacking structure 6 is arranged between the hydraulic cylinder 2 and the safety valve seat 1. The elastic jacking structure is used for preventing the lower linkage cylinder body 24 from moving downwards when the linkage cavity 21 is pressurized, the separation limiting ring body 5 is used for avoiding the pressure communication between the linkage cavity 21 and the hydraulic cavity 22,

the hydraulic cylinder 2 is of a split structure and comprises an upper moving cylinder body 23 and a lower linkage cylinder body 24, and the upper moving cylinder body 23 is connected with the lower linkage cylinder body 24 through an inserting structure 7.

As can be seen, the plug structure 7 includes a plug ring 71 disposed on the upper moving cylinder 23, and a connection slot 72 for inserting the plug ring 71 is disposed on the inner side of the upper circumference of the lower linkage cylinder 24. The plug structure 7 is convenient to detach the hydraulic cylinder 2, a locking structure is arranged between the plug ring body 71 and the end part of the connecting slot 72 to prevent the plug ring body 71 from slipping off during moving, and the length of the plug ring body 71 and the connecting slot 72 is larger than the height of the upper moving cylinder body 23 and the lower linkage cylinder body 24 which need to move.

Obviously, the elastic pressing structure 6 includes an upper annular positioning groove 61 disposed at the bottom of the lower insertion ring 71, the top of the safety valve seat 1 is provided with a pressing pad 62, the pressing pad 62 is provided with a lower annular positioning groove 63, the valve rod 11 is provided with a pressing spring 64, one end of the pressing spring 64 acts on the upper annular positioning groove 61, and the other end acts on the lower annular positioning groove 63.

Furthermore, the jacking cushion block 62 is connected with the upper end face of the safety valve seat 1, a penetrating hole through which the valve rod 11 can penetrate is formed in the middle of the jacking cushion block 62, and a movable gap is formed between the circumferential direction of the penetrating hole and the valve rod 11. This is provided to avoid resistance when the valve stem 11 is lifted.

Specifically, go up the one end of moving cylinder 23 towards lower linkage pull rod and be located plug ring body 71 circumference inboard and be equipped with linkage 231, linkage 231 tip supports to lean on the setting at spacing ring body 5 up end of separation, and plug ring body 71 circumference inboard of lower linkage cylinder 24 has spacing portion 241 of annular, and spacing ring body 5 of separation sets up on spacing portion 241 of annular. The circumference of the separation limit ring body 5 is tightly attached to the inner wall of the lower linkage cylinder body 24.

Furthermore, the plug connection mechanism 4 includes a threaded connection groove 41 disposed at an end portion of the linkage pull rod 3, and a threaded connection cylinder 42 is disposed on the valve rod 11, one end of the threaded connection cylinder 42 is disposed in the threaded connection groove 41, and the valve rod 11 and the circumferential outer side of the linkage pull rod 3 are connected through a threaded connection cylinder 43.

More specifically, the screw connection cylinder 43 includes a rod connection portion 431, the rod connection portion 431 is connected to the linkage rod 3, and a valve rod connection portion 432 is provided at one end of the rod connection portion 431, and the valve rod connection portion 432 is connected to the valve rod 11. The rod connecting part 431 is in threaded connection with the linkage pull rod 3, the valve rod connecting part 432 is in threaded connection with the valve rod 11, and the valve rod 11 is in threaded connection with the lower linkage cylinder 24.

In detail, the diameter of the rod body connecting portion 431 is larger than that of the valve rod connecting portion 432, the circumferential inner side of the blocking limiting ring body 5 is tightly attached to the circumferential direction of the valve rod connecting portion 432, and the lower end of the rod body connecting portion 431 abuts against the upper end face of the blocking limiting ring body 5. When the hydraulic cavity 22 is pressurized, the lower linkage cylinder 24 moves downward and drives the valve rod 11 to move downward synchronously, the valve rod 11 drives the threaded connection cylinder 43 to move downward, the rod connection portion 431 presses the blocking limiting ring body 5, and the blocking limiting ring body 5 presses the annular limiting portion 241 downward.

Preferably, the upper end of the linkage pull rod 3 is exposed out of the hydraulic cylinder 2, a locking nut 25 is sleeved on the outer side of the circumferential direction of the linkage pull rod, one end of the valve rod 11 is arranged in the safety valve seat 1, a spring 12 is sleeved on the end, located in the safety valve seat 1, of the valve rod 11 in the circumferential direction, and the valve rod 11 is provided with a supporting ring 13 used for supporting and pressing the spring 12.

In summary, the principle of the present embodiment is: when the safety valve seat is disassembled, the locking nut 25 is adjusted downwards to limit the upper end face of the upper moving rod, the hydraulic cylinder 2 is used for pressurizing the hydraulic cavity 22, the lower linkage cylinder body 24 overcomes the acting force of the jacking spring 64 to move downwards, the valve rod 11 moves downwards synchronously, the valve rod 11 is in threaded connection with one end of the linkage pull rod 3, the linkage pull rod 3 is in threaded connection with the upper moving cylinder body 23, therefore, the upper moving cylinder body 23 moves downwards synchronously, the spring 12 is extruded downwards through the supporting ring 13, the spring 12 unloads force to the sealing cover body 8 of the safety valve seat 1, and therefore the nuts on the two sides of the valve rod 11 are convenient to disassemble; after the sealing cover body 8 is installed, the hydraulic cavity 22 is decompressed, the locking nut 25 is adjusted upwards, the jacking spring 64 is used for jacking the bottom of the lower linkage cylinder body 24, the external supercharging air pump 26 is used for supercharging the linkage cavity 21, the upper moving cylinder body 23 is made to move upwards, the linkage pull rod 3 drives the valve rod 11 to move upwards synchronously, the supporting ring 13 is made to abut against the sealing cover, and the spring 12 pushes the sealing cover body 8 again.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the relief valve seat 1, the valve stem 11, the spring 12, the support ring 13, the hydraulic cylinder 2, the linkage cavity 21, the hydraulic cavity 22, the upper moving cylinder 23, the linkage portion 231, the lower linkage cylinder 24, the annular limiting portion 241, the lock nut 25, the external boost air pump 26, the external hydraulic pump 27, the linkage pull rod 3, the plug connection mechanism 4, the threaded connection groove 41, the threaded connection cylinder 42, the threaded connection cylinder 43, the rod connection portion 431, the valve stem connection portion 432, the blocking limiting ring 5, the elastic pressing structure 6, the upper annular positioning groove 61, the pressing pad 62, the lower annular positioning groove 63, the pressing spring 64, the plug structure 7, the plug ring 71, the connection slot 72, and the sealing cover 8 are used more often, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides a heavy-calibre spring relief valve assembly and disassembly tools, is including setting up pneumatic cylinder (2) in relief valve seat (1) upper end, pneumatic cylinder (2) in be equipped with linkage pull rod (3), its characterized in that, linkage pull rod (3) link to each other through grafting coupling mechanism (4) with valve rod (11) of wearing to establish on relief valve seat (1) between, and grafting coupling mechanism (4) circumference is equipped with spacing ring body of separation (5), spacing ring body of separation (5) with pneumatic cylinder (2) circumference inboard split into linkage cavity (21) and hydraulic cavity (22), and hydraulic cavity (22) link to each other with outside hydraulic pump (27), linkage cavity (21) are connected with outside booster pump (26), pneumatic cylinder (2) and relief valve seat (1) between be equipped with elasticity roof pressure structure (6).

2. The tool for disassembling and assembling the large-caliber spring-type safety valve according to claim 1, characterized in that the hydraulic cylinder (2) is of a split structure and comprises an upper movable cylinder body (23) and a lower linkage cylinder body (24), and the upper movable cylinder body (23) is connected with the lower linkage cylinder body (24) through an insertion structure (7).

3. The tool for disassembling and assembling the large-caliber spring-type safety valve according to claim 2, characterized in that the plug structure (7) comprises a plug ring body (71) arranged on the upper moving cylinder body (23), and the circumferential inner side of the lower linkage cylinder body (24) is provided with a connecting slot (72) for the plug ring body (71) to be inserted into.

4. A tool for mounting and dismounting a large-caliber spring-loaded safety valve according to claim 3, wherein the elastic pressing structure (6) comprises an upper annular positioning groove (61) formed at the bottom of the lower plug ring body (71), a pressing pad (62) is arranged at the upper end of the safety valve seat (1), a lower annular positioning groove (63) is formed in the pressing pad (62), a pressing spring (64) is arranged on the valve rod (11), and one end of the pressing spring (64) acts on the upper annular positioning groove (61) while the other end acts on the lower annular positioning groove (63).

5. The tool for disassembling and assembling the large-caliber spring-type safety valve according to claim 4, characterized in that the jacking block (62) is connected with the upper end face of the safety valve seat (1), a penetrating hole for the valve rod (11) to penetrate through is formed in the middle of the jacking block (62), and a movable gap is formed between the circumferential direction of the penetrating hole and the valve rod (11).

6. The dismounting tool for the large-caliber spring-type safety valve according to claim 3, characterized in that a linkage part (231) is arranged at one end of the upper moving cylinder (23) facing the downward linkage rod body and located on the circumferential inner side of the insertion ring body (71), the end part of the linkage part (231) abuts against the upper end surface of the blocking limiting ring body (5), an annular limiting part (241) is arranged on the circumferential inner side of the insertion ring body (71) of the lower linkage cylinder (24), and the blocking limiting ring body (5) is arranged on the annular limiting part (241).

7. The tool for disassembling and assembling the large-caliber spring-type safety valve according to claim 1, wherein the plug connection mechanism (4) comprises a threaded connection groove (41) formed in an end portion of the linkage pull rod (3), a threaded connection cylinder (42) is arranged on the valve rod (11), one end of the threaded connection cylinder (42) is arranged in the threaded connection groove (41), and the valve rod (11) and the circumferential outer side of the linkage pull rod (3) are connected through a threaded connection cylinder (43).

8. The tool for dismounting and mounting a large-caliber spring-type safety valve according to claim 7, wherein the threaded connection cylinder (43) comprises a rod connection part (431), the rod connection part (431) is connected with the linkage pull rod (3), a valve rod connection part (432) is arranged at one end of the rod connection part (431), and the valve rod connection part (432) is connected with the valve rod (11).

9. The tool for disassembling and assembling the large-caliber spring-type safety valve according to claim 8, wherein the diameter of the rod connecting part (431) is larger than that of the valve rod connecting part (432), the circumferential inner side of the blocking limit ring body (5) is tightly attached to the circumferential direction of the valve rod connecting part (432), and the lower end of the rod connecting part (431) abuts against the upper end face of the blocking limit ring body (5).

10. The tool for dismounting and mounting the large-caliber spring-type safety valve according to claim 9, wherein the upper end of the linkage pull rod (3) is exposed out of the hydraulic cylinder (2) and is circumferentially sleeved with a lock nut (25), one end of the valve rod (11) is arranged in the safety valve seat (1), one end of the valve rod (11) positioned in the safety valve seat (1) is circumferentially sleeved with a spring (12), and the valve rod (11) is provided with a supporting ring (13) for pressing the spring (12).