CN201836479U - Safety relief device of metal two-way sealing valve cavity - Google Patents

Abstract

The utility model discloses a safety relief device of a metal two-way sealing valve cavity, which comprises a main cavity arranged on a valve, wherein the main cavity comprises an overflow cavity and a relief cavity; the overflow cavity can be communicated with the interior of the valve cavity; the relief cavity can be communicated with an external pipeline of the valve cavity; a connecting channel is arranged between the overflow cavity and the relief cavity; one end of the overflow cavity is closed; and a reset mechanism by which the other end of the overflow cavity is communicated with or separated from the interior of the valve cavity is arranged in the overflow cavity. The safety relief device has a simple structure and is low in cost; and the safety relief device is directly arranged in a valve opening-closing part for relieving the abnormally-raising fluid pressure in the valve cavity back to the inside of a pipeline, so that the safety relief device is safe and environment-friendly.

Description

Metal two way sealed valve pocket safety relief device

Technical field

The utility model relates to fluid control field, particularly a kind of metal two way sealed valve pocket safety relief device.

Background technique

Existing metal two way sealed valve, when the open-shut device of valve was closed, the flowing medium in the valve pocket was just blocked in valve pocket by two-way.Be trapped in media such as gas in the valve pocket, hydro carbons owing to be subjected to the influence of factor such as pipe temperature rising, tend to cause press in the valve pocket unusual the rising.Therefore, need timely pressure release, damage to prevent valve, thus the stability of assurance valve working.

In order to address the above problem, generally adopt an external inner chamber pressure relief device on valve at present.But there is following defective in existing inner chamber pressure relief device: (1) must be installed on the valve outside, complex structure, expense height; (2) external inner chamber pressure relief device is directly arranged high temperature or poisonous and hazardous medium to atmosphere, causes potential safety hazard, produces environmental pollution problem simultaneously, can't satisfy environmental requirement; (3) there is the risk that is subjected to artificial or non-natural causes destruction in the inner chamber pressure relief device.

The model utility content

The purpose of this utility model provides a kind of metal two way sealed valve pocket safety relief device, and simple in structure, cost is low, directly is arranged in the valve pipe, is about to hydrodynamic pressure in the valve pocket and releases in the return pipe road safety and environmental protection.

The technical solution of the utility model is: a kind of metal two way sealed valve pocket safety relief device, comprise the main cavity of being located on the valve, described main cavity comprises overflow cavity that can be connected with valve pocket inside and the cavity of releasing that can be connected with the valve pocket external pipe, is provided with a connection channel between two cavitys; The one end sealing of described overflow cavity is provided with the resetting-mechanism that can make its other end and valve pocket inside be connected or separate in the described overflow cavity.

The utility model can be done following improvement, is provided with the overflow housing that adapts with this cavity geometry in the described overflow cavity, and described resetting-mechanism is a spring reset mechanism, and this spring reset mechanism is located in the described overflow housing.

The utility model can also be done following improvement, the outside one end sealing of described overflow housing, and an inboard end is provided with and is used for the overflow hole that is connected with valve pocket inside; Described spring reset mechanism comprises a spring and is positioned at the wherein sealing steel ball that makes described overflow hole sealing of an end of this spring.

The utility model can be done following further improvement, also is provided with an adjusting plug screw that is used to regulate described spring pressure in the described overflow housing, and the two ends of described spring hold out against respectively on described adjusting plug screw and sealing steel ball.

Described overflow cavity is by being located at the capping sealing of described overflow housing outer end.

The utility model can also be done following improvement, be provided with the non-return housing that adapts with this cavity geometry in the described cavity of releasing, inboard one end that is used on the described non-return housing being connected with described connecting passage is provided with escape orifice, and the outside one end that is used for being connected with the valve pocket external pipe is provided with the plug screw of releasing.

Be provided with the Non-Return steel ball that can make described escape orifice sealing in the non-return housing described in the utility model.

The beneficial effects of the utility model are:

(1) the utility model is simple in structure, novel, and cost is low, and the user need not external inner chamber pressure relief device on valve, has significantly reduced the expense of user's additional configuration pressure relief device;

(2) the utility model has really been realized the seal action of metal two way sealed valve, and for example existing gate valve on the market for guaranteeing safety, bores a relief hole in gate valve one side or valve seat, original two way sealed valve is changed make the use of one-way sealing valve.Just need not to bore relief hole after using the utility model, promptly guaranteed the two way sealed performance of gate valve.

(3) the utility model is released the fluid medium pressure in the valve pocket in the return pipe road, effectively avoided with high temperature or poisonous and harmful medium directly row cause safety or environmental pollution problems to atmosphere, compliance with environmental protection requirements fully;

(4) be located in the valve pipe owing to safety relief device of the present utility model, thereby greatly reduce the risk that artificial or non-natural causes is destroyed;

(5) because safety relief device of the present utility model is provided with Non-Return steel ball,, still can guarantee the inlet seal of valve, can not cause potential safety hazard even this bleeder damages because of working life or other factors.

Description of drawings

Fig. 1 is the utility model embodiment 1 a sectional view;

Fig. 2 is the spheroid partial sectional view among Fig. 1;

Fig. 3 is the spheroid broken section enlarged view that is provided with safety relief device among Fig. 1;

Fig. 4 is the plan view of Fig. 2;

Fig. 5 is the utility model embodiment 2 a sectional view;

Fig. 6 partly cuts open schematic representation for the side-looking of Fig. 5;

Fig. 7 is the utility model embodiment 3 a sectional view.

Among the figure, 1. overflow cavity, 2. release cavity, 3. connecting passage, 4. Non-Return steel ball, 5. overflow housing, 6. spring, 7. sealing steel ball, 8. adjusting plug screw, 9. capping, 10. non-return housing, theplug screw 11. release, 12. spheroids, 13. flashboards, 14a, 14b. relief hole, 15. faucet bodies, 16. valve bodies, 17. valve gap, 18. valve seats, 51. overflow holes.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

Embodiment 1

One of embodiment of the present utility model is as Fig. 1-shown in Figure 4, a kind of metal two way sealed valve pocket safety relief device, comprise the main cavity of being located on the valve, main cavity comprises that overflow cavity that can be connected with valve pocket inside 1 and releasing of can being connected with the valve pocket external pipe are provided with aconnection channel 3 betweencavity 2, two cavitys; The one end sealing ofoverflow cavity 1 is provided with the resetting-mechanism that can make its other end and valve pocket inside be connected or separate in theoverflow cavity 1.

In the present embodiment, the utility model is applied on the bidirectional eccentric metal hard-sealing ball valve, be specially: safety relief device is located on thespheroid 12 of bidirectional eccentric metal hard-sealing ball valve, promptly onspheroid 12 sidewalls, be provided with corresponding receiving cavity, as the main cavity and the connectingpassage 3 of safety relief device.Be provided with theoverflow housing 5 that adapts with this cavity geometry in theoverflow cavity 1, resetting-mechanism is a spring reset mechanism, and this spring reset mechanism is located in the overflow housing 5.The outside one end sealing ofoverflow housing 5, an inboard end are provided with and are used for theoverflow hole 51 that is connected with valve pocket inside; Spring reset mechanism comprises aspring 6 and is positioned at the wherein sealingsteel ball 7 of madeoverflow hole 51 sealings of an end of this spring 6.Also be provided with an adjustingplug screw 8 that is used forRegulation spring 6 pressure in theoverflow housing 5, regulateplug screw 8 and be tightened on the inwall ofoverflow housing 5, the two ends ofspring 6 hold out against respectively in regulating onplug screw 8 and the sealing steel ball 7.Can or screw out by precession and regulateplug screw 8, the release pressure of free adjusting spring 6.Capping 9 sealings ofoverflow cavity 1 by being located atoverflow housing 5 outsides, i.e.capping 9 is sealingly fastened in the outer end opening place ofoverflow cavity 1, prevents because of the uncertain accurately release pressure of settingspring 6 of pipeline internal medium pressure height behind the valve.Releasing is provided with thenon-return housing 10 that adapts with this cavity geometry in thecavity 2, and inboard one end that is used on thenon-return housing 10 being connected with connectingpassage 3 is provided with escape orifice, and the outside one end that is used for being connected with the valve pocket external pipe is provided with theplug screw 11 of releasing.Sealing and fixing between the outside one end ofnon-return housing 10 and the inwall of thecavity 2 of releasing.Be provided with theNon-Return steel ball 4 that can make the escape orifice sealing in the non-return housing 10.Theplug screw 11 of releasing both can limit Non-Returnsteel ball 4, can release again and boost unusually.Escape orifice madial wall on thenon-return housing 10 is provided with one section outer narrow inner width formula conical surface that can hold Non-Returnsteel ball 4 and this escape orifice is sealed.

Working principle of the present utility model is as follows:

During normality,spheroid 12 is folded in thevalve body 16, is sealed and installed withvalve gap 17 on thevalve body 16, the corresponding hard alloy layer that is provided with onspheroid 12 and thevalve seat 18, and the two sealing, promptly ball valve is in closed condition.Withoverflow hole 51 sealings, it is inside and outside isolated to be about to valve pocket under the pressure effect ofspring 6 for sealing steel ball 7.Non-Return steel ball 4 holds out against on the conical surface in escape orifice, be about to escape orifice and also seal, thereby thecavity 2 of will releasing is isolated with connectingpassage 3.

When valve pocket pressure rises to 1.1-1.3 times rated pressure,spring 6 take-offs that are provided with in the pressure relief device, the flowing medium in the valve pocket is washed sealingsteel ball 7 and Non-Returnsteel ball 4, the interior pressure of releasing open.Be that flowing medium flows out to overflowhousing 5 and non-returnhousing 10 in valve pocket, finally release to valve pipe.

When pressing the Reseating pressure of a safety valve that is lower than sealingsteel ball 7 again in the valve pocket,spring 6 resets and againoverflow hole 51 is sealed.Non-Returnsteel ball 4 also seals escape orifice again.Owing to be provided withNon-Return steel ball 4, effectively avoided being used for the phenomenon that thespring 6 of pressure release can not accurately takeoff because being subjected to the influence of pipe medium pressure.

Embodiment 2

Embodiment of the present utility model two as Fig. 5, shown in Figure 6, different is that the utility model is applied on the steel gate valve with a last embodiment.In the present embodiment, safety relief device is located on theflashboard 13, promptly is provided with receiving cavity onflashboard 13, as the main cavity and the connectingpassage 3 of safety relief device.Main cavity comprisesoverflow cavity 1 that can be connected with valve pocket inside and thecavity 2 of releasing that can be connected with the valve pocket external pipe.Be specially: a sidetracking that is provided with safety relief device onflashboard 13 has therelief hole 14a that can be communicated withoverflow cavity 1 and valve pocket.The working principle of present embodiment is withembodiment 1.

Embodiment 3

Embodiment of the present utility model three as shown in Figure 7, different is that the utility model is applied on the metallic seal stopcock with embodiment 1.In the present embodiment, safety relief device is located on thefaucet body 15 of stopcock, promptly is provided with receiving cavity onfaucet body 15, as the main cavity and the connectingpassage 3 of safety relief device.Main cavity comprisesoverflow cavity 1 that can be connected with valve pocket inside and thecavity 2 of releasing that can be connected with the valve pocket external pipe.Thisfaucet body 15 is provided with therelief hole 14b that can be communicated withoverflow cavity 1 and valve pocket.The working principle of present embodiment is withembodiment 1.

The above embodiments only are preferred embodiment of the present utility model, can not limit interest field of the present utility model with this, and therefore, the equivalent variations according to the utility model claim is done still belongs to the scope that the utility model is contained.

Claims (8)

1. metal two way sealed valve pocket safety relief device, it is characterized in that comprising the main cavity of being located on the valve, described main cavity comprises overflow cavity (1) that can be connected with valve pocket inside and the cavity of releasing (2) that can be connected with the valve pocket external pipe, is provided with a connection channel (3) between two cavitys; The one end sealing of described overflow cavity (1) is provided with the resetting-mechanism that can make its other end and valve pocket inside be connected or separate in the described overflow cavity (1).

2. metal two way sealed valve pocket safety relief device according to claim 1, it is characterized in that being provided with in the described overflow cavity (1) the overflow housing (5) that adapts with this cavity geometry, described resetting-mechanism is a spring reset mechanism, and this spring reset mechanism is located in the described overflow housing (5).

3. metal two way sealed valve pocket safety relief device according to claim 2 is characterized in that the outside one end sealing of described overflow housing (5), and an inboard end is provided with and is used for the overflow hole (51) that is connected with valve pocket inside; Described spring reset mechanism comprises a spring (6) and is positioned at the wherein sealing steel ball (7) that makes described overflow hole (51) sealing of an end of this spring (6).

4. metal two way sealed valve pocket safety relief device according to claim 3, it is characterized in that also being provided with in the described overflow housing (5) an adjusting plug screw (8) that is used to regulate described spring (6) pressure, the two ends of described spring (6) hold out against respectively on described adjusting plug screw (8) and sealing steel ball (7).

5. metal two way sealed valve pocket safety relief device according to claim 4 is characterized in that described overflow cavity (1) is by being located at capping (9) sealing in described overflow housing (5) outside.

6. according to any described metal two way sealed valve pocket safety relief device in the claim 2 to 5, it is characterized in that being provided with in the described cavity of releasing (2) the non-return housing (10) that adapts with this cavity geometry, inboard one end that is used on the described non-return housing (10) being connected with described connecting passage (3) is provided with escape orifice, and the outside one end that is used for being connected with the valve pocket external pipe is provided with the plug screw of releasing (11).

7. metal two way sealed valve pocket safety relief device according to claim 6 is characterized in that being provided with in the described non-return housing (10) Non-Return steel ball (4) that can make described escape orifice sealing.

8. metal two way sealed valve pocket safety relief device according to claim 7 is characterized in that the escape orifice madial wall on the described non-return housing (10) is provided with one section outer narrow inner width formula conical surface that can hold described Non-Return steel ball (4) and this escape orifice is sealed.

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