Safety relief valve

Abstract

The utility model discloses a safety relief valve which comprises a valve seat, a valve cover is arranged at the upper end of the valve seat, a valve rod is arranged in the valve seat, a valve clack is arranged below the valve rod, and a sealing membrane is arranged in the valve seat. The sealing membrane comprises an upper rubber layer, a lower rubber layer and a nylon cord fabric layer arranged between the rubber layers. The thickness of the sealing membrane ranges from 0.8 mm to 1 mm. The sealing diaphragm comprises the upper rubber layer, the lower rubber layer and the nylon cord fabric layer arranged between the rubber layers, the rubber layers are mainly used for sealing, and the nylon cord fabric layer can be used for improving the supporting strength of the sealing diaphragm, so that the whole sealing diaphragm can bear the pressure intensity of 6MPa; and the problems of influence on reaction sensitivity and even failure caused by damage of the sealing membrane can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of valve, concretely relates to a safety pressure relief valve. BACKGROUND

[0002] Generally, a pressure relief valve is installed on a pipeline to control the pipeline pressure safety, when the pipeline pressure exceeds the set value, the valve opens to unload the excess pressure, and when the pressure is lower than the set value, the pressure relief valve closes. If the pressure relief valve in the pipeline system is damaged, the pressure cannot be released in time, resulting in different damages and safety accidents.

[0003] The pressure relief valve in the related art needs to be opened for pressure relief multiple times, after long-time use, the diaphragm is prone to damage due to the need to bear a large pressure, thereby affecting the reaction sensitivity, and even causing the pressure relief valve to fail, affecting safety. UTILITY MODEL CONTENTS

[0004] The utility model discloses a safety pressure relief valve.

[0005] The utility model discloses a safety pressure relief valve.

[0006] A safety pressure relief valve, comprising a valve seat, the upper end of the valve seat is provided with a valve cover, a valve rod is arranged in the valve seat, a valve flap is arranged below the valve rod, and a sealing diaphragm is arranged in the valve seat.

[0007] The sealing diaphragm comprises two layers of rubber layers and a nylon cord layer arranged between the rubber layers.

[0008] The thickness of the sealing diaphragm is 0.8-1mm.

[0009] As a further description of the above technology, the thickness of the sealing diaphragm is 0.8mm.

[0010] As a further description of the above technology, the valve rod comprises a valve rod body and a lubricating sleeve in interference fit with the valve rod body.

[0011] As a further description of the above technology, the lubricating sleeve is a polyformaldehyde sleeve.

[0012] As a further description of the above technology, the valve seat and the valve cover are made of any one of stainless steel and duplex steel.

[0013] As a further description of the above technology, the valve rod body is made of stainless steel.

[0014] As a further description of the above technology, a sealing soft pad is arranged on the valve seat.

[0015] As a further description of the above-mentioned technology, the sealing soft pad is vulcanized rubber.

[0016] The utility model discloses the beneficial effect is as follows:

[0017] 1. The utility model discloses a sealing diaphragm includes the rubber layer of upper and lower two layers, and the nylon cord fabric layer of setting between the rubber layer, wherein the rubber layer is mainly used for sealing, and the nylon cord fabric layer can be used for improving the support strength of sealing diaphragm, make the whole sealing diaphragm can bear 6MPa pressure intensity, can effectively reduce the problem of the influence reaction sensitivity even invalidation of sealing diaphragm breakage.

[0018] 2. The utility model discloses the thickness of sealing diaphragm is 0.8mm, make the whole pressure relief valve reaction more sensitive, and further more safe, effectively reduce the security problem of unable timely pressure relief.

[0019] In order to more clearly set forth the structural features and the role of the utility model, the utility model will be described in detail below by combining with the drawings and specific embodiments. DRAWINGS

[0020] Fig. 1 It is the front view of the safety pressure relief valve of the utility model,

[0021] Fig. 2 It is the sectional view of the safety pressure relief valve of the utility model,

[0022] Fig. 3 It is the perspective view of the valve rod of the utility model.

[0023] Reference signs: 1, valve seat, 2, valve cover, 3, valve rod, 31, valve rod main body, 32, lubricating sleeve, 4, valve flap, 5, sealing diaphragm, 6, sealing soft pad. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clearly, the technical scheme in the utility model embodiment will be clearly and completely described below by combining with the drawings in the utility model embodiment.

[0025] As Figs. 1-3 Shown, in an embodiment, a safety pressure relief valve, including valve seat 1, the upper end of valve seat 1 is provided with valve cover 2, is provided with valve rod 3 in valve seat 1, is provided with valve flap 4 below valve rod 3, is provided with sealing diaphragm 5 in valve seat 1,

[0026] The sealing diaphragm 5 comprises two layers of rubber layers and a nylon cord layer arranged between the rubber layers, wherein the rubber layers are mainly used for sealing, and the nylon cord layer can be used for improving the supporting strength of the sealing diaphragm 5, so that the whole sealing diaphragm 5 can withstand a pressure of 6 MPa, and the problem of reaction sensitivity caused by damage of the sealing diaphragm 5 can be effectively reduced.

[0027] The thickness of the sealing diaphragm 5 is 0.8-1 mm, and in some embodiments, the thickness of the sealing diaphragm 5 is 0.8 mm, so that the reaction of the whole pressure relief valve is more sensitive, thereby being safer, and the safety problem caused by the failure of timely pressure relief can be effectively reduced. It can be understood that a thinner diaphragm can produce sufficient deformation when subjected to a smaller pressure change. The thinner diaphragm can displace enough at a lower pressure, thereby pushing the valve opening mechanism to make the pressure relief valve respond to the pressure change more quickly.

[0028] Optionally, the valve rod 3 comprises a valve rod body 31 and a lubricating sleeve 32 in interference fit with the valve rod body 31, wherein the valve rod body 31 is made of stainless steel and mainly serves as a support. In some embodiments, the lubricating sleeve 32 is a polyformaldehyde sleeve, which can effectively reduce the frictional resistance and be more wear-resistant, thereby effectively improving the service life of the valve rod 3.

[0029] Optionally, the valve seat 1 and the valve cover 2 are made of any one of stainless steel and duplex steel, and in some embodiments, other special alloys such as nickel-based alloy or copper alloy can also be selected and used according to specific requirements.

[0030] Optionally, the sealing soft pad 6 is arranged on the valve seat 1, and the sealing soft pad 6 is preferably vulcanized rubber, which is less likely to fall off and can effectively prolong the service life.

[0031] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings, and the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here, and the contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0032] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A safety pressure relief valve, characterized in that, The valve includes a valve seat, a valve cover at the upper end of the valve seat, a valve stem inside the valve seat, a valve disc below the valve stem, and a sealing diaphragm inside the valve seat. The sealing diaphragm includes upper and lower rubber layers, and a nylon fabric layer disposed between the rubber layers; The thickness of the sealing diaphragm is 0.8-1mm.

2. The safety relief valve according to claim 1, characterized in that, The thickness of the sealing diaphragm is 0.8 mm.

3. The safety relief valve according to claim 1, characterized in that, The valve stem includes a valve stem body and a lubricating sleeve that is interference-fitted with the valve stem body.

4. The safety relief valve according to claim 3, characterized in that, The lubricating sleeve is a polyoxymethylene outer sleeve.

5. The safety relief valve according to claim 1, characterized in that, The valve seat and the valve cover are made of either stainless steel or duplex steel.

6. The safety relief valve according to claim 1, characterized in that, The valve stem body is made of stainless steel.

7. The safety relief valve according to claim 1, characterized in that, A sealing gasket is provided on the valve seat.

8. The safety relief valve according to claim 7, characterized in that, The sealing gasket is made of vulcanized rubber.

Images