CN213271184U

CN213271184U - Automatic pressure relief device for pressure relief valve

Info

Publication number: CN213271184U
Application number: CN202022137427.XU
Authority: CN
Inventors: 胡晓剑
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-05-25
Anticipated expiration: 2030-09-25

Abstract

The utility model discloses an automatic pressure relief device for relief valve belongs to pressure release technical field, an automatic pressure relief device for relief valve includes casing down, casing upper end fixedly connected with goes up the casing down, go up casing upper end inner wall fixedly connected with spring holder, spring holder lower extreme fixedly connected with spring assembly, spring assembly lower extreme fixedly connected with receives the pressure plate. The utility model discloses in surpass the pressure value upper limit that makes the spring assembly warp when water pressure, the spring assembly receives overload water pressure and produces compression deformation, the card strip of side board both sides is followed last casing internal surface draw-in groove and is directionally gone up the slip, side board and the sealing strip that the surface was fixed remove from pressure release hole position, the inside water of casing passes through pressure release hole department and flows down, along with hydraulic reduction, the spring assembly resets gradually, side board and the sealing strip that the surface was fixed seal the pressure release hole again when water pressure reaches normal level, accomplish automatic pressure release operation, be fit for being extensively promoted and used.

Description

Automatic pressure relief device for pressure relief valve

Technical Field

The utility model relates to a pressure release technical field especially relates to an automatic pressure relief device for relief valve.

Background

The automatic opening and closing device can be automatically opened and closed according to the working pressure of the system, and is generally arranged on equipment or a pipeline of a closed system to protect the safety of the system. When the pressure in the equipment or the pipeline exceeds the set pressure of the pressure release valve, the pressure release valve is automatically opened, the medium pressure in the equipment or the pipeline is ensured to be below the set pressure, the equipment and the pipeline are protected, and accidents are prevented. The pressure release valve is composed of needle valve, pressure gauge, main valve, pilot valve and connecting pipe. It is one kind of hydraulic control valve. The main valve is divided into upper and lower parts by a diaphragm, the lower cavity of the diaphragm is a water flow channel, and the upper cavity is a control chamber for controlling the opening and closing of the valve clack of the main valve. The pilot valve is a pressure release valve, and it also has control chamber and water flow channel, and the valve clack is opened and closed by control chamber. A needle valve, i.e. a throttle valve, controls the flow of water in the connecting pipe. When the pressure of water is lower than the set pressure relief value, the thrust of the pilot valve spring is higher than the pressure of water, and the valve clack of the pilot valve is in a closed state. The other path of control water enters the upper cavity of the main valve through the throttling needle valve to generate static pressure, and the pressure intensity of the upper cavity is equal to the pressure intensity in the generating flow channel. Because the upper plane of the valve clack of the main valve is larger than the lower plane, the pressure of the upper cavity opposite valve is larger than the pushing direction of the water opposite valve in the main flow passage, and the main valve is in a closed state. If the water pressure in main pipeline rises and exceeds the set pressure relief value, the water pressure entering the control chamber of the guide pipe through the control pipe increases, the pilot valve is opened when the water pressure is greater than the thrust of the spring, and the main valve is set to start pressure relief. Because of the restriction of the throttle valve and insufficient water supply, the pressure of the upper cavity of the main valve is reduced, and the main valve is in the same valve with marrow ice. The flow thrust is greater than the upper cavity pressure, the valve clack rises, and the main valve opens to release pressure rapidly. The process is completed instantly, so that the indoor fire-fighting water supply system cannot cause harm when overpressure occurs. If the water flow pressure of the main pipeline continues to increase, the opening amount of the pilot valve is increased, so that the pressure difference between the upper cavity and the lower cavity of the main valve is larger, the opening amount of the main valve is larger, and the pressure relief of the system is faster. Conversely, if the main line water flow pressure decreases, the pilot valve control chamber pressure decreases and the pilot valve opening decreases. The pressure of the upper cavity of the main valve is increased, and the valve clack of the main valve is tightly closed, so that the water flow pressure of the main pipeline is stabilized in the system design.

The conventional pressure relief valve has the following technical defects: 1. the whole internal mechanical parts of the pressure release valve are complex, the whole manufacturing cost is high, and the pressure release valve is not easy to assemble and maintain; 2. the pressure release valve needs manual work to fix a position when the pipeline is assembled, and the assembly process is time-consuming and labor-consuming. To this end, we propose an automatic pressure relief device for a pressure relief valve.

SUMMERY OF THE UTILITY MODEL

The utility model provides an automatic pressure relief device for relief valve, exceed the pressure value upper limit that makes the spring assembly warp when water pressure, the spring assembly receives overload water pressure and produces compression deformation, the card strip of side board both sides is followed last casing internal surface draw-in groove and is carried out directional upglide, the sealing strip that side board and surface were fixed is removed from pressure release hole position, the inside water of casing flows through pressure release hole department down, along with hydraulic reduction, the spring assembly resets gradually, sealing strip that side board and surface were fixed seals the pressure release hole again when water pressure reaches normal level, accomplish automatic pressure release operation, can effectively solve the problem in the background art.

The utility model provides a specific technical scheme as follows:

the utility model provides a pair of an automatic pressure relief device for relief valve, including lower casing, casing upper end fixedly connected with goes up the casing down, go up casing upper end inner wall fixedly connected with spring holder, spring holder lower extreme fixedly connected with spring assembly, spring assembly lower extreme fixedly connected with is pressed the board, pressed board both sides fixedly connected with side board, side board surface fixed connection has the card strip, it has seted up the draw-in groove to go up the casing surface, the inside cooperation of draw-in groove slides there is the card strip, casing both sides fixedly connected with ring flange A down, ring flange A opposite side can be dismantled and be connected with ring flange B, the ring flange B lateral wall is pegged graft and is had the cutting, carry out fixed connection between cutting and the ring flange A.

Optionally, a drain pipe is connected to the center of the upper end of the lower shell in a through manner.

Optionally, the other side of the flange B is fixedly connected with a water pipe.

Optionally, the outer surface of the side plate is fixedly connected with a sealing strip, and the sealing strip is located at the lower end of the clamping strip.

Optionally, the outer surface of the upper shell is provided with a pressure relief hole, and the pressure relief hole is located at the lower end of the clamping groove.

The utility model has the advantages as follows:

1. the utility model has the advantages of practicality, convenient operation and good use effect, when external water enters the lower shell through the water pipe, the water flows into the upper shell through the water drain pipe, the pressure plate generates corresponding water pressure, if the water pressure exceeds the upper limit of the pressure value for deforming the spring set, the spring set generates compression deformation under the pressure of overload water pressure, the clamping strips on the two sides of the side plate slide upwards along the clamping grooves on the inner surface of the upper shell in a directional way, the side plate and the sealing strips fixed on the outer surface are removed from the pressure relief holes, water in the lower shell flows out through the pressure relief holes, and the spring set gradually resets along with the reduction of the water pressure, when the water pressure reaches the normal level, the side plate and the sealing strip fixed on the outer surface seal the pressure relief hole again to complete the automatic pressure relief operation, and the problems that the whole internal mechanical part of the pressure relief valve is complex, the whole manufacturing cost is high, and the assembly and the maintenance are not easy are solved.

2. The utility model discloses in, insert the slot that ring flange B corresponds on the water pipe through the cutting on the ring flange A to the location butt joint of mounting hole on the completion ring flange need not the manual work and fixes a position, has improved the packaging efficiency between device and the water pipe, has solved the relief valve and has needed the manual work to fix a position when lieing in that the pipeline assembles, problem that the equipment process is wasted time and energy.

Drawings

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

Fig. 1 is a schematic view of an overall structure of an automatic pressure relief device for a pressure relief valve according to an embodiment of the present invention;

fig. 2 is a schematic side view of an upper case of an automatic pressure relief device for a pressure relief valve according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a position a of an automatic pressure relief device for a pressure relief valve according to an embodiment of the present invention;

in the figure: 1. a lower housing; 2. a flange A; 3. cutting; 4. a flange B; 5. a water pipe; 6. a drain pipe; 7. an upper housing; 8. a spring seat; 9. a spring set; 10. a card slot; 11. a pressure relief vent; 12. a pressure receiving plate; 13. a side plate; 14. a sealing strip; 15. and (6) clamping the strip.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

An automatic pressure relief device for a pressure relief valve according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 3.

As shown in fig. 1-3, an automatic pressure relief device for pressure relief valve, includes casing 1 down, casing 7 is gone up to 1 upper end fixedly connected with of casing down, go up 7 upper end inner wall fixedly connected with spring seats 8 of casing, 8 lower extreme fixedly connected with spring group 9 of spring seats, 9 lower extreme fixedly connected with of spring group receive pressure plate 12, receive 12 both sides fixedly connected with side boards 13 of pressure plate, 13 outer fixed surface of side board is connected with card strip 15, go up 7 surfaces of casing and seted up draw-in groove 10, the inside cooperation of draw-in groove 10 slides and has card strip 15, 1 both sides fixedly connected with ring flange a2 of casing down, ring flange a2 opposite side can be dismantled and be connected with ring flange B4, ring flange B4 lateral wall is pegged graft and is had cutting 3, carry out fixed connection between cutting 3 and the ring flange a 2.

In this embodiment, as shown in fig. 1-3, when external water enters the lower casing 1 through the water pipe 5, the water flows into the upper casing 7 through the water discharge pipe 6, and generates corresponding water pressure on the pressure receiving plate 12, if the water pressure exceeds the upper limit of the pressure value for deforming the spring set 9, the spring set 9 is compressed and deformed by the overload water pressure, the clamping strips 15 on both sides of the side plate 13 slide up along the clamping grooves 10 on the inner surface of the upper casing 7, the side plate 13 and the sealing strips 14 fixed on the outer surface are removed from the pressure release holes 11, the water in the lower casing 1 flows out through the pressure release holes 11, the spring set 9 is gradually reset along with the reduction of the water pressure, when the water pressure reaches the normal level, the side plate 13 and the sealing strips 14 fixed on the outer surface re-seal the pressure release holes 11 again, the automatic pressure release operation is completed, and the problem that the, the whole manufacturing cost is high, and the assembly and the maintenance are not easy; insert through the cutting 3 on the ring flange A2 on the water pipe 5 in the slot that ring flange B4 corresponds to accomplish the location butt joint of mounting hole on the ring flange, need not the manual work and fix a position, improved the packaging efficiency between device and the water pipe, solved the relief valve and need the manual work to fix a position when the pipeline is assembled, problem that the equipment process is wasted time and energy.

Wherein, the central position of the upper end of the lower shell 1 is connected with a drain pipe 6 in a penetrating way.

In this embodiment, as shown in fig. 1, water flows into the upper housing 7 through the water discharge pipe 6, and generates a corresponding water pressure on the pressure receiving plate 12.

Wherein, the other side of the flange B4 is fixedly connected with a water pipe 5.

In this embodiment, as shown in fig. 1, external water is introduced into the lower housing 1 through the water pipe 5.

Wherein, the outer surface fixed connection of side board 13 has sealing strip 14, sealing strip 14 is located card strip 15 lower extreme.

In this embodiment, as shown in fig. 3, the sealing strip 14 plays a role of sealing a gap, so as to prevent water leakage and ensure normal pressure relief of water pressure.

The outer surface of the upper shell 7 is provided with a pressure relief hole 11, and the pressure relief hole 11 is located at the lower end of the clamping groove 10.

In this embodiment, as shown in fig. 2, the pressure relief hole 11 is mainly used to discharge water with overpressure.

It should be noted that, the utility model relates to an automatic pressure relief device for pressure relief valve, when working, when external water enters into the lower casing 1 through the water pipe 5, water flows into the upper casing 7 through the water drain pipe 6, and generates corresponding water pressure to the pressure receiving plate 12, if the water pressure exceeds the upper limit of the pressure value that makes the spring assembly 9 deform, the spring assembly 9 generates compression deformation by the overload water pressure, the clamping strips 15 at the two sides of the side plate 13 slide up along the clamping grooves 10 on the inner surface of the upper casing 7, the side plate 13 and the sealing strip 14 fixed on the outer surface are removed from the position of the pressure relief hole 11, the water in the lower casing 1 flows out through the pressure relief hole 11, along with the reduction of the water pressure, the spring assembly 9 resets gradually, when the water pressure reaches the normal level, the side plate 13 and the sealing strip 14 fixed on the outer surface re-seal the pressure relief hole 11, the automatic pressure relief operation is completed, the problem that, the whole manufacturing cost is high, and the assembly and the maintenance are not easy; insert through the cutting 3 on the ring flange A2 on the water pipe 5 in the slot that ring flange B4 corresponds to accomplish the location butt joint of mounting hole on the ring flange, need not the manual work and fix a position, improved the packaging efficiency between device and the water pipe, solved the relief valve and need the manual work to fix a position when the pipeline is assembled, problem that the equipment process is wasted time and energy.

The utility model discloses a lower shell 1; a flange A2; cutting 3; flange B4; a water pipe 5; a water discharge pipe 6; an upper case 7; a spring seat 8; a spring set 9; a card slot 10; a pressure relief hole 11; a pressure receiving plate 12; side plates 13; a sealing strip 14; the card strip 15 components are all standard or known to those skilled in the art, and their structure and principle are known to those skilled in the art through technical manuals or through routine experimentation.

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

Claims

1. An automatic pressure relief device for a pressure relief valve comprises a lower shell (1) and is characterized in that the upper end of the lower shell (1) is fixedly connected with an upper shell (7), the inner wall of the upper end of the upper shell (7) is fixedly connected with a spring seat (8), the lower end of the spring seat (8) is fixedly connected with a spring group (9), the lower end of the spring group (9) is fixedly connected with a pressed plate (12), the two sides of the pressed plate (12) are fixedly connected with side plates (13), the outer surface of each side plate (13) is fixedly connected with a clamping strip (15), the outer surface of the upper shell (7) is provided with a clamping groove (10), the clamping strip (15) is matched and slides in the clamping groove (10), the two sides of the lower shell (1) are fixedly connected with flange plates A (2), the other sides of the flange plates A (2) can be detachably connected with flange plates B (4), and the inserting strip (3) is fixedly connected with the flange A (2).

2. The automatic pressure relief device for the pressure relief valve according to claim 1 is characterized in that a drain pipe (6) is connected through the center of the upper end of the lower housing (1).

3. The automatic pressure relief device for the pressure relief valve according to claim 1, characterized in that a water pipe (5) is fixedly connected to the other side of the flange B (4).

4. The automatic pressure relief device for the pressure relief valve according to claim 1, characterized in that a sealing strip (14) is fixedly connected to the outer surface of the side plate (13), and the sealing strip (14) is located at the lower end of the clamping strip (15).

5. The automatic pressure relief device for the pressure relief valve according to claim 1, wherein a pressure relief hole (11) is formed in the outer surface of the upper housing (7), and the pressure relief hole (11) is located at the lower end of the clamping groove (10).