CN212672541U

CN212672541U - Spring type reset safety valve

Info

Publication number: CN212672541U
Application number: CN201922381263.2U
Authority: CN
Inventors: 李新明
Original assignee: Jiangsu Riyue Petroleum Equipment Co ltd
Current assignee: Jiangsu Riyue Petroleum Equipment Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2021-03-09
Anticipated expiration: 2029-12-26

Abstract

The utility model discloses a spring relief valve that resets, including valve body, load spring, access joint assembly and outlet joint assembly, the valve body is connected with access joint assembly and outlet joint assembly, sets up in the valve body and is used for controlling the piston that communicates or close between access joint assembly and the outlet joint assembly, and the valve body upper end sets up the valve cap, set up the connecting rod in the valve cap, the outside of valve cap sets up a handle that resets, and the lower extreme and the piston of connecting rod are connected, control piston's motion, and the upper end of connecting rod is connected with the impetus of handle that resets. The utility model discloses cancelled the oiling district of the upper and lower extreme of piston, set up the buffer block, pure mechanical atress precision is higher, and the buffer block has certain guard action to the piston of relief valve. The utility model discloses cancelled the square hole on the piston, piston overall structure shifts up, shifts up the whole latus rectum in back and discharges the fluid, has avoided piston friction seal spare, has eliminated the potential safety hazard.

Description

Spring type reset safety valve

Technical Field

The utility model relates to a fluid or gaseous control flap, more specifically say, relate to spring relief valve that resets.

Background

The existing safety valve is a shear pin safety valve, fluid enters through a connector connected to a valve body and props against a piston assembly, when the pressure of the fluid exceeds a rated value, a piston rises, a cushion buffers the impulsive force generated when the piston rises, a shear pin plate is jacked to force a shear pin to break, a safety cover is fixed through a lock spring to prevent the shear pin from breaking and popping out, and the fluid is discharged from an outlet of the valve body through the connector to be decompressed. The piston cannot reset after pressure relief, and the shear pin needs to be replaced even if the piston resets. The bleed pressure is varied by moving the position of the shear pin. When the pressure is adjusted, the safety pin is inserted into the corresponding hole according to the given pressure. When the cylinder liner size changes, the relief valve pressure must be set accordingly. The safety coefficient of the device is not high enough, and when the strength of the pin is not enough, the pin can pop out to hurt people. If iron wires, welding electrodes or other materials are used, the pressure value of the safety valve can be affected by the operation, and accidents can be caused. While the safety shield acts to protect the shear pin from snapping out, the risk factor still exists.

The reset safety valve adopts piston motion to achieve the closing and communicating effects, oil injection areas are arranged at the upper end and the lower end of the piston, and the problem of opening precision error of the safety valve is caused due to the fact that oil pressure in the two oil injection areas is unbalanced easily.

The design of a piston in a traditional reset safety valve has defects, and the common design is that a square hole is processed on the piston to release pressure and remove fluid. But the emission latus rectum can't reach the requirement of design, and discharge speed reduces, has the potential safety hazard to external equipment to at the pressure release in-process, the piston shifts up rapidly, and piston friction sealing member, square hole have the cutting action to the sealing member, have certain potential safety hazard.

Disclosure of Invention

The purpose of the invention is as follows: aiming at the defects and shortcomings of the prior art, the spring type reset safety valve is provided, the oil injection areas at the upper end and the lower end of the piston are eliminated, the buffer blocks are arranged, the purely mechanical stress precision is higher, and the buffer blocks have a certain protection effect on the piston of the safety valve; the square hole on the piston is cancelled, the whole structure of the piston moves upwards, and the whole drift diameter discharges fluid after the piston moves upwards, so that the piston is prevented from rubbing the sealing element, the square hole has cutting action on the sealing element, and the potential safety hazard is eliminated.

The technical scheme is as follows: in order to achieve the purpose, the utility model provides a spring type reset safety valve, which comprises a valve body, a load spring, an inlet joint assembly and an outlet joint assembly, wherein the valve body is connected with the inlet joint assembly and the outlet joint assembly, a piston for controlling the communication or the closing between the inlet joint assembly and the outlet joint assembly is arranged in the valve body, the upper end of the valve body is provided with a valve cap, a connecting rod is arranged in the valve cap, the outer side of the valve cap is provided with a reset handle, the lower end of the connecting rod is connected with the piston to control the movement of the piston, the upper end of the connecting rod is connected with the acting point of the reset handle, a compression spring is arranged below the acting point of the reset handle, the bottom of the compression spring props against the bottom of an inner cavity of the valve cap, the top of the compression spring is provided with an adjusting bolt for adjusting the deformation of the, the spring is fixed by an upper spring retainer ring, a lower spring retainer ring and a load screw, and the load screw is fixed by a valve cap. The piston up-movement and valve body inner wall top contact's position sets up the buffer block, piston external seal and dog have still been set up between piston and the valve body, the valve body lower extreme sets up the valve body joint, the valve body passes through the valve body joint and is connected with the inlet joint assembly.

And an anti-corrosion layer is arranged on the inner wall of the valve body joint.

A pressure display is set on the bonnet.

And a pressure relief key is also arranged in the valve cap and used for manually relieving pressure.

Still set up a crank that resets in the valve cap, the crank that resets is connected with the handle that resets, and the handle that resets is connected on the valve cap through the crank that resets.

And a balance seat is also arranged in the valve cap, and the piston is connected with the balance seat through a connecting rod.

Has the advantages that: compared with the prior art, the utility model, its beneficial effect is:

1. the utility model discloses cancelled the oiling district of the upper and lower extreme of piston, set up the buffer block, pure mechanical atress precision is higher, and the buffer block has certain guard action to the piston of relief valve.

2. The utility model discloses cancelled the square hole on the piston, piston overall structure shifts up, shifts up the whole latus rectum in back and discharges the fluid, has avoided piston friction sealing member, and the square hole has the cutting action to the sealing member, has eliminated the potential safety hazard.

3. The utility model discloses separately set up valve body joint and inlet joint assembly, the valve body joint does not exist not appear not hard up phenomenon when the on-the-spot installation with the valve body assembly back that targets in place, has guaranteed the sealing performance of the relief valve that wholly resets.

4. The utility model discloses connect the inner wall at the valve body and set up anti-corrosion coating, prolonged the life of relief valve that resets and improved its operation precision.

Drawings

Fig. 1 is the structure schematic diagram of the spring type reset safety valve of the utility model.

FIG. 2 is a schematic cross-sectional view taken along line A-A in FIG. 1

Detailed Description

The present invention will be described in detail with reference to the following examples, but the scope of the present invention is not limited to the examples.

As shown in fig. 1 and 2, the spring type reset safety valve comprises a valve body 3, a load spring 14, an inlet joint assembly 1 and an outlet joint assembly 18, wherein the valve body 3 is connected with the inlet joint assembly 1 and the outlet joint assembly 18, a piston 6 for controlling the communication or closing between the inlet joint assembly 1 and the outlet joint assembly 18 is arranged in the valve body 3, a valve cap 10 is arranged at the upper end of the valve body 3, a connecting rod 8 is arranged in the valve cap 10, a reset handle 9 is arranged at the outer side of the valve cap 10, the lower end of the connecting rod 8 is connected with the piston 6 to control the movement of the piston 6, the upper end of the connecting rod 8 is connected with the acting point of the reset handle 9, a compression spring is arranged below the acting point of the reset handle 9, the bottom of the compression spring abuts against the bottom of an inner cavity of the valve cap 10, and an adjusting bolt for adjusting the deformation of the compression, the load spring 14 is arranged opposite to the reset handle 9 and is fixed by an upper spring retainer ring, a lower spring retainer ring and a load screw, and the load screw is fixed through the valve cap 10.

The piston 6 upward movement and the position of 3 inner walls top contacts of valve body set up buffer block 7, piston external seal 4 and dog 5 have still been set up between piston 6 and the

valve body

3, 3 lower extremes of valve body set up valve body joint 2, valve body 3 passes through valve body joint 2 and is connected with inlet joint assembly 1.

And an anti-corrosion layer is arranged on the inner wall of the valve body joint 2.

A pressure indicator 13 is set on the bonnet 10.

A pressure relief key 16 is also provided in the bonnet 10.

A reset crank 15 is further arranged in the valve cap 10, the reset crank 15 is connected with a reset handle 9, and the reset handle 9 is connected to the valve cap 10 through the reset crank 15.

A balance seat 17 is also provided in the bonnet 10, and the piston 6 is connected to the balance seat 17 by a connecting rod 8.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A spring type reset safety valve comprises a valve body (3), a load spring (14), an inlet joint assembly (1) and an outlet joint assembly (18), wherein the valve body (3) is connected with the inlet joint assembly (1) and the outlet joint assembly (18), a piston (6) used for controlling the communication or the closing between the inlet joint assembly (1) and the outlet joint assembly (18) is arranged in the valve body (3), a valve cap (10) is arranged at the upper end of the valve body (3), a connecting rod (8) is arranged in the valve cap (10), a reset handle (9) is arranged on the outer side of the valve cap (10), the lower end of the connecting rod (8) is connected with the piston (6) to control the movement of the piston (6), the upper end of the connecting rod (8) is connected with an acting point of the reset handle (9), and a compression spring is arranged below the acting point of the reset handle (9), compression spring's bottom supports valve cap (10) inner chamber bottom, compression spring's top is provided with the adjusting bolt of the deformation volume of an adjustment compression spring, load spring (14) set up in the opposite of handle (9) that resets, fixed by last spring collar, lower spring collar and load screw, load screw passes through valve cap (10) fixedly, its characterized in that: the anti-corrosion valve is characterized in that a buffer block (7) is arranged at the position where the piston (6) moves upwards and contacts with the upper portion of the inner wall of the valve body (3), a piston outer seal (4) and a stop block (5) are further arranged between the piston (6) and the valve body (3), a valve body joint (2) is arranged at the lower end of the valve body (3), the valve body (3) is connected with an inlet joint assembly (1) through the valve body joint (2), and an anti-corrosion layer is arranged on the inner wall of the valve body joint (2).

2. The spring-loaded reset safety valve of claim 1, wherein: still set up one in valve cap (10) and reset crank (15), reset crank (15) are connected with reset handle (9), and reset handle (9) are connected on valve cap (10) through resetting crank (15).

3. The spring-loaded reset safety valve of claim 1, wherein: and a balance seat (17) is also arranged in the valve cap (10), and the piston (6) is connected with the balance seat (17) through a connecting rod (8).