CN215522123U

CN215522123U - Spring type safety valve

Info

Publication number: CN215522123U
Application number: CN202121824997.4U
Authority: CN
Inventors: 张善群
Original assignee: Zhejiang Suqi Technology Co ltd
Current assignee: Zhejiang Suqi Technology Co ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-01-14
Anticipated expiration: 2031-08-05

Abstract

The utility model discloses a spring type safety valve which comprises a valve body with a flow channel, a support and a valve shaft, wherein the valve shaft is installed on the support and extends into the valve body, a compression spring is arranged on the valve shaft, a valve seat is arranged in the valve body, a valve core matched with the valve seat to form a seal is arranged on the valve shaft, an adjusting cover is connected to the support in a threaded mode, one end of the compression spring is connected with the valve shaft, the other end of the compression spring is connected with the adjusting cover, and a buffer piece is arranged below the valve seat. The utility model has the following advantages and effects: the valve seat with the buffering effect can adjust the pretightening force of the compression spring of the safety valve, prevent the pretightening force from reducing the sealing effect due to the fatigue of spring materials, and prolong the service life of the valve seat and the valve core.

Description

Spring type safety valve

Technical Field

The utility model relates to the technical field of safety valves, in particular to a spring type safety valve.

Background

The opening and closing actions of the spring safety valve are that the valve core is automatically opened and closed by means of medium pressure change at the inlet end and the spring pretightening force, when the medium pressure rises to be larger than the pretightening force of the spring, the valve core overcomes the pretightening force of the spring to automatically open, redundant medium is discharged, the internal pressure is reduced, and due to the action of the spring force, when the internal pressure is reduced to a safety value, the valve core is automatically closed, the discharging is stopped, but after the spring is used for a long time, the material fatigue of the spring is easily caused, the pretightening force is reduced, and a good sealing effect cannot be achieved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a spring type safety valve which can adjust the pretightening force of a spring and has a buffering effect on a valve shaft.

The technical purpose of the utility model is realized by the following technical scheme: the utility model provides a spring relief valve, includes valve body, the support that has the runner, installs on the support and extends into the valve shaft in the valve body, sets up the seal receptacle between support and valve body, be equipped with compression spring on the valve shaft, be equipped with the disk seat in the valve body, be equipped with the cooperation disk seat on the valve shaft and constitute sealed case, threaded connection has the regulation lid on the support, compression spring's one end is connected with the valve shaft, the other end is connected with the regulation lid, be equipped with the seal groove between seal receptacle and the valve shaft, be equipped with seal assembly in the seal groove, seal assembly includes gland packing and sets up the packing casting die on gland packing, the disk seat has the bolster.

Through adopting above-mentioned technical scheme, through connect the regulation lid on the support with set up the compression spring cooperation on the valve shaft soon, adjust the lid through the rotating and can adjust compression spring's pretightning force, when the spring is because of long-term emergence material is tired, through connect the regulation lid drive spring on the support soon towards the support motion and compress it, thereby adjust spring's pretightning force, make it keep anticipated pretightning force for a long time, can play fine sealed effect to the valve shaft through the gland packing, the pretightning force is exerted to the gland packing to the rethread packing casting die, thereby realize better sealing, prevent to reveal the emergence.

Further setting the following steps: the sealing filler includes the V type and packs, sets up the packing clamping ring on the V type is packed and sets up the packing ring in V type packing below, the V type is packed including a plurality of polytetrafluoroethylene layer and sets up the rubber layer between a plurality of polytetrafluoroethylene layers, the polytetrafluoroethylene layer all sets up along the axial of valve shaft with the rubber layer, pack the casting die including setting up in the extrusion spring that the seal groove is used for extrudeing the sealing filler.

Through adopting above-mentioned technical scheme, V type is packed after receiving packing clamping ring and packing casting die to its applied pressure, and the structure of its V type can make both sides outwards expand, makes its inseparabler laminating on valve shaft and seal groove, very big its sealed effect of increase.

Further setting the following steps: the valve comprises a valve body and is characterized in that a mounting groove for mounting the valve seat is formed in the valve body, a limiting ring for limiting the valve seat to be separated from the mounting groove is arranged on the mounting groove, the valve seat is arranged in the mounting groove in a reciprocating sliding mode towards the valve core, and the buffer piece comprises a buffer cushion arranged between one side of the valve seat, back to the valve core, and the mounting groove.

Through adopting above-mentioned technical scheme, when the medium is less than compression spring pretightning force to the pressure that the case was applyed, the case can take place to kick-back, produces certain impact force to the disk seat, causes the damage of disk seat or case easily, and to sliding the setting with the disk seat and set up the blotter at the disk seat lower extreme, when the disk seat received the impact of case, can play very big buffering effect, increases its life.

Further setting the following steps: the valve shaft is provided with a spring seat which is arranged in a sliding manner, and a limiting platform which limits the movement of the spring seat is arranged below the valve shaft.

Through adopting above-mentioned technical scheme, the spring holder plays limiting displacement to compression spring.

Further setting the following steps: and the bracket is also provided with a locking piece which has the functions of limiting and locking the adjusting cover.

Through adopting above-mentioned technical scheme, the retaining member plays the locking effect to adjusting the lid, thereby prevents to adjust the lid and takes place not hard up reduction compression spring's pretightning force because of the shake in the use.

Further setting the following steps: the retaining member comprises a retaining nut, and the retaining nut is screwed on the bracket.

Through adopting above-mentioned technical scheme, the readjustment lid rotating is behind suitable position, with lock nut rotating to rather than inconsistent, exerts the pretightning force through lock nut to the regulation lid, prevents that it is not hard up.

In conclusion, the utility model has the following beneficial effects: the pretightning force of adjustable relief valve compression spring prevents that it from reducing sealed effect because spring material is tired to the setting has the disk seat of buffering effect, increases the life of disk seat and case.

Drawings

FIG. 1 is a sectional view of the embodiment;

fig. 2 is an enlarged view of a portion a in fig. 1.

In the figure: 1. a valve body; 2. a sealing seat; 3. a support; 4. a valve shaft; 5. a compression spring; 6. A valve seat; 7. a valve core; 8. an adjusting cover; 9. a sealing groove; 10. a seal assembly; 101. a compression spring; 102. sealing and filling; 1021. packing and pressing a ring; 1022. a polytetrafluoroethylene layer; 1023. A rubber layer; 1024. a packing washer; 11. mounting grooves; 12. a limiting ring; 13. a cushion pad; 14. a spring seat; 15. a limiting table; 16. and locking the nut.

Detailed Description

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

Referring to fig. 1 and 2, a spring-type safety valve comprises a valve body 1 with a flow passage, a support 3, a valve shaft 4 installed on the support 3 and extending into the valve body 1, a seal seat 2 arranged between the support 3 and the valve body 1, a compression spring 5 sleeved on the valve shaft 4, a spring seat 14 arranged in an axial sliding manner sleeved on the valve shaft 4, a limit platform 15 arranged below the valve shaft and used for limiting the movement of the spring seat 14, a valve seat 6 arranged in the valve body 1, a valve core 7 matched with the valve seat 6 to form a seal and fixedly arranged on the valve shaft 4, an adjusting cover 8 connected on the support 3 in a threaded manner, one end of the compression spring 5 abutting against the valve shaft 4 and the other end abutting against the adjusting cover 8, the seal seat 2 fixedly installed on the support 3, the seal seat 2 fixedly installed on the valve seat 6, a seal groove 9 arranged between the seal seat 2 and the valve shaft 4, a seal assembly 10 arranged in the seal groove 9, and an installation groove 11 arranged in the valve body 1 for installing the valve seat 6, the installation groove 11 is fixedly provided with a limiting ring 12 for limiting the valve seat 6 to be separated from the installation groove 11, the valve seat 6 is arranged in the installation groove 11 towards the valve core 7 in a reciprocating sliding mode, a buffer cushion 13 is arranged between one face, back to the valve core 7, of the valve seat 6 and the installation groove 11, and the buffer cushion 13 is made of rubber materials.

Specifically, as shown in fig. 1 and 2, the sealing assembly 10 includes a sealing filler 102 and a packing pressing member disposed on the sealing filler 102, the sealing filler 102 includes a V-shaped filler, a packing pressing ring 1021 disposed on the V-shaped filler, and a packing gasket 1024 disposed below the V-shaped filler, the V-shaped filler includes a plurality of polytetrafluoroethylene layers 1022 and rubber layers 1023 disposed between the plurality of polytetrafluoroethylene layers 1022, the polytetrafluoroethylene layers 1022 and the rubber layers 1023 are both arranged along an axial direction of the valve shaft 4, and the packing pressing member is an extrusion spring 101 disposed in the sealing groove 9 and used for extruding the sealing filler 102.

As shown in fig. 1, the bracket 3 is further provided with a locking member for limiting and locking the adjusting cover 8, and the locking member is a locking nut 16 screwed with the bracket 3.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a spring relief valve, includes valve body (1), support (3) that have the runner, installs valve shaft (4) on support (3) and in extending into valve body (1), sets up seal receptacle (2) within support (3) and valve body (1), be equipped with compression spring (5) on valve shaft (4), be equipped with disk seat (6) in valve body (1), be equipped with on valve shaft (4) and cooperate disk seat (6) to constitute sealed case (7), its characterized in that: threaded connection has regulation lid (8) on support (3), the one end and valve shaft (4) of compression spring (5) are connected, the other end is connected with regulation lid (8), be equipped with seal groove (9) between seal receptacle (2) and valve shaft (4), be equipped with seal assembly (10) in seal groove (9), seal assembly (10) are including sealed filler (102) and set up the packing casting die on sealed filler (102), disk seat (6) have the bolster.

2. The spring-loaded safety valve of claim 1, wherein: the packing (102) includes the V type and packs, sets up packing clamping ring (1021) on the V type packs and sets up packing washer (1024) below the V type packs, the V type packs and includes a plurality of polytetrafluoroethylene layer (1022) and sets up rubber layer (1023) between a plurality of polytetrafluoroethylene layer (1022), polytetrafluoroethylene layer (1022) and rubber layer (1023) all set up along the axial arrangement of valve shaft (4), pack the casting die including set up in extrusion spring (101) that seal groove (9) are used for extrudeing packing (102).

3. The spring-loaded safety valve of claim 1, wherein: be equipped with mounting groove (11) that supply disk seat (6) to install in valve body (1), be equipped with spacing ring (12) that restriction disk seat (6) break away from mounting groove (11) on mounting groove (11), disk seat (6) set up in mounting groove (11) towards case (7) reciprocating sliding, the bolster is including setting up blotter (13) between disk seat (6) one side and mounting groove (11) of case (7) dorsad.

4. The spring-loaded safety valve of claim 1, wherein: the valve shaft (4) is provided with a spring seat (14) which is arranged in a sliding manner, and a limiting table (15) which limits the movement of the spring seat (14) is arranged below the valve shaft.

5. The spring-loaded safety valve of claim 1, wherein: and the bracket (3) is also provided with a locking piece which has limiting and locking effects on the adjusting cover (8).

6. The spring-loaded safety valve of claim 5, wherein: the locking piece comprises a locking nut (16), and the locking nut (16) is screwed on the bracket (3).