CN209115748U - A kind of relief valve triggered by strut buckling suitable for low pressure operating condition - Google Patents

Abstract

The utility model discloses a kind of relief valves triggered by strut buckling suitable for low pressure operating condition, are related to valve technology field.Including valve body, the right side of the valve body offers import, the left side of the valve body is provided with outlet, the upper surface of the valve body is fixedly installed with valve deck, the upper surface of the valve deck is fixedly installed with guide sleeve, cavity is formed between the valve body and valve deck, diaphragm is fixedly installed between the bonnet lower surface and valve body upper surface, cavity is divided into epicoele and cavity of resorption by the diaphragm, it is intracavitary under described to be provided with valve seat, the upper surface of the valve deck is fixedly installed with bar cage, is fixedly installed with hold-doun nut at the top of the bar cage.The utility model drives second piston bar and First piston bar to move upwards by diaphragm, is bent elongate rod unstability, uses in low pressure operating condition convenient for the relief valve, make pressure release better effect, by valve deck and bar cage, convenient for being detected and being repaired to relief valve.

Description

A kind of relief valve triggered by strut buckling suitable for low pressure operating condition

Technical field

The utility model relates to valve technology field, it is specially a kind of suitable for low pressure operating condition by strut buckling triggering Relief valve.

Background technique

Relief valve is the operating pressure energy automatic open close according to system, is generally mounted in the equipment or pipeline of closed system Protection system safety, when equipment or manifold pressure are more than relief valve setting pressure, i.e. automatic opening pressure release, guarantee equipment and Pipeline internal medium pressure protects equipment and pipeline, prevents accident under setting pressure.

Currently, the relief valve that market is common, main valve is divided into upper and lower two parts by diaphragm, and diaphragm cavity of resorption is water stream channel, Epicoele is control room, by it come the opening and closing of control bound flap, makes that its structure is complicated, causes to be difficult to repair and check, increase Production cost, while using effect is bad in low pressure operating condition.For this purpose, propose it is a kind of suitable for low pressure operating condition by strut buckling The relief valve of triggering is to solve the above problems.

Utility model content

(1) the technical issues of solving

In view of the deficiencies of the prior art, the utility model provides a kind of being triggered by strut buckling suitable for low pressure operating condition Relief valve, have and drive second piston bar and First piston bar to move upwards by diaphragm, be bent elongate rod unstability, be convenient for The relief valve uses in low pressure operating condition, makes pressure release better effect, by valve deck and bar cage, convenient for relief valve carry out detection and It the advantages that maintenance, solves that its structure is complicated, causes to be difficult to repair and check, increase production cost, while in low pressure operating condition The bad problem of middle using effect.

(2) technical solution

It drives second piston bar and First piston bar to move upwards above by diaphragm to realize, keeps elongate rod unstability curved Song uses in low pressure operating condition convenient for the relief valve, makes pressure release better effect, by valve deck and bar cage, convenient for relief valve into The purpose of row detection and maintenance, the utility model provides the following technical solutions: it is a kind of suitable for low pressure operating condition by strut buckling The relief valve of triggering, including valve body, the right side of the valve body offer import, and the left side of the valve body is provided with outlet, institute The upper surface for stating valve body is fixedly installed with valve deck, and the upper surface of the valve deck is fixedly installed with guide sleeve, the valve body and valve deck Between be formed with cavity, be fixedly installed with diaphragm between the bonnet lower surface and valve body upper surface, the diaphragm is by cavity point It is cut into epicoele and cavity of resorption, intracavitary under described to be provided with valve seat, the upper surface of the valve deck is fixedly installed with bar cage, the bar cage Top is fixedly installed with hold-doun nut, and the lower surface of the hold-doun nut is fixedly installed with elongate rod, the following table of the elongate rod Face is fixedly installed with First piston bar, and the First piston bar is movably installed in guide sleeve, the following table of the First piston bar Face is fixedly installed with second piston bar, and the second piston bar is through diaphragm lower part, and diaphragm is fixedly installed in second piston In bar, the lower surface of the second piston bar is equipped with extension, and the extension and second piston bar are integrally formed institute, mechanism The outer surface for stating extension is fixedly embedded at sealing element, and the extension is movably installed in valve seat.

Advanced optimize the technical program, the hold-doun nut, elongate rod, First piston bar and second piston bar longitudinal axis The heart is overlapped, and the longitudinal axis center of the second piston bar and the center of circle of valve seat are overlapped.

The technical program is advanced optimized, the diameter length of the extension and the diameter length of valve seat match.

(3) beneficial effect

Compared with prior art, the utility model provides a kind of letting out by strut buckling triggering suitable for low pressure operating condition Pressure valve, have it is following the utility model has the advantages that

1, it should make Fluid pressure will by the cavity of resorption of setting suitable for the relief valve of low pressure operating condition triggered by strut buckling Diaphragm compresses upwards, then drives second piston bar and First piston bar to move upwards by diaphragm, is bent elongate rod unstability, just It is used in low pressure operating condition in the relief valve, makes pressure release better effect.

2, it should be made by the valve deck and bar cage of setting suitable for the relief valve of low pressure operating condition triggered by strut buckling It is convenient for detecting and repair, substantially increase the practicability of the device.

Detailed description of the invention

FIG. 1 is a schematic structural view of the utility model；

Fig. 2 is the normal condition cross-sectional view of the utility model；

Fig. 3 is the pressure release state cross-sectional view of the utility model.

In figure: 1, valve body；2, import；3, it exports；4, valve deck；5, guide sleeve；6, cavity；601, epicoele；602, cavity of resorption；7, Diaphragm；8, valve seat；9, bar cage；10, hold-doun nut；11, elongate rod；12, First piston bar；13, second piston bar；14, extend Portion；15, sealing element.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1-3 is please referred to, the utility model discloses a kind of pressure releases triggered by strut buckling suitable for low pressure operating condition Valve, including valve body 1, the right side of valve body 1 offer import 2, and the left side of valve body 1 is provided with outlet 3, and the upper surface of valve body 1 is solid Dingan County is equipped with valve deck 4, and the upper surface of valve deck 4 is fixedly installed with guide sleeve 5, cavity 6, valve deck are formed between valve body 1 and valve deck 4 4 lower surfaces and valve body are fixedly installed with diaphragm 7 between 1 upper surface, and cavity 6 is divided into epicoele 601 and cavity of resorption 602 by diaphragm 7, under Valve seat 8 is provided in chamber 602, the upper surface of valve deck 4 is fixedly installed with bar cage 9, and the top of bar cage 9 is fixedly installed with hold-doun nut 10, the lower surface of hold-doun nut 10 is fixedly installed with elongate rod 11, and the lower surface of elongate rod 11 is fixedly installed with First piston bar 12, First piston bar 12 is movably installed in guide sleeve 5, and the lower surface of First piston bar 12 is fixedly installed with second piston bar 13, second piston bar 13 is through 7 lower part of diaphragm, and diaphragm 7 is fixedly installed in second piston bar 13, second piston bar 13 Lower surface is equipped with extension 14, and extension 14 and second piston bar 13 are integrally formed mechanism, and the outer surface of extension 14 is fixed It is embedded with sealing element 15, extension 14 is movably installed in valve seat 8.

Specifically, hold-doun nut 10, the 13 longitudinal axis center phase mutual respect of elongate rod 11, First piston bar 12 and second piston bar Folded, the longitudinal axis center of second piston bar 13 and the center of circle of valve seat 8 are overlapped, and First piston bar 12 and second piston bar 13 are upward The damage that elongate rod 11 should not be caused when mobile, is more uniformly stressed, enable extension 14 be properly inserted in valve seat 8.

Specifically, the diameter length of extension 14 and the diameter length of valve seat 8 match, extension 14 and valve seat 8 are sealed Property is more preferably.

When in use, fluid is entered in cavity of resorption 602 by import 2, and fluid compresses diaphragm 7 upwards, flows when in cavity of resorption 602 When the pressure of body reaches 11 Buckling Load of elongate rod, 11 unstability of elongate rod bending, fluid will push diaphragm 7 and drive second It is moved on piston rod 13, second piston bar 13 drives First piston bar 12 to move up, the extension 14 in second piston bar 13 It moves up, flows into fluid in valve seat 8, and by 3 outflow of outlet, achieve the purpose that open pressure release, in normal conditions, stream When the pressure of body is less than 11 Buckling Load of elongate rod, elongate rod 11 maintains to stablize, the extension of 13 lower end of second piston bar 14 are inserted in valve seat 8, are at closed state.

In conclusion second should be driven to live by diaphragm 7 suitable for the relief valve of low pressure operating condition triggered by strut buckling Stopper rod 13 and First piston bar 12 move upwards, and are bent 11 unstability of elongate rod, use in low pressure operating condition convenient for the relief valve, Make pressure release better effect, the relief valve is detected and repaired by valve deck 4 and bar cage 9.

It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that There is also other identical elements in process, method, article or equipment including the element.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (3)

1. a kind of relief valve triggered by strut buckling suitable for low pressure operating condition, including valve body (1), it is characterised in that: described The right side of valve body (1) offers import (2), and the left side of the valve body (1) is provided with outlet (3), the upper table of the valve body (1) Face is fixedly installed with valve deck (4), and the upper surface of the valve deck (4) is fixedly installed with guide sleeve (5), the valve body (1) and valve deck (4) it is formed between cavity (6), is fixedly installed with diaphragm (7), institute between valve deck (4) lower surface and valve body (1) upper surface It states diaphragm (7) and cavity (6) is divided into epicoele (601) and cavity of resorption (602), be provided with valve seat (8), institute in the cavity of resorption (602) The upper surface for stating valve deck (4) is fixedly installed with bar cage (9), is fixedly installed with hold-doun nut (10), institute at the top of the bar cage (9) The lower surface for stating hold-doun nut (10) is fixedly installed with elongate rod (11), and the lower surface of the elongate rod (11) is fixedly installed with One piston rod (12), the First piston bar (12) are movably installed in guide sleeve (5), the following table of the First piston bar (12) Face is fixedly installed with second piston bar (13), and the second piston bar (13) is through diaphragm (7) lower part, and diaphragm (7) is fixed It is installed in second piston bar (13), the lower surface of the second piston bar (13) is equipped with extension (14), the extension (14) be integrally formed mechanism with second piston bar (13), and the outer surface of the extension (14) is fixedly embedded at sealing element (15), the extension (14) is movably installed in valve seat (8).

2. a kind of relief valve triggered by strut buckling suitable for low pressure operating condition according to claim 1, feature exist In: the hold-doun nut (10), elongate rod (11), First piston bar (12) and second piston bar (13) longitudinal axis center phase mutual respect Folded, the longitudinal axis center of the second piston bar (13) and the center of circle of valve seat (8) are overlapped.

3. a kind of relief valve triggered by strut buckling suitable for low pressure operating condition according to claim 1, feature exist In: the diameter length of the diameter length and valve seat (8) of the extension (14) matches.