Micro-opening type automatic pressure release valve

Abstract

The utility model provides a micro-opening type automatic pressure release valve, which relates to the technical field of pressure release valves and comprises a valve body, a connecting-in end is arranged below the valve body, a pressure release opening is arranged on the right side of the valve body and communicated with an inner cavity of the valve body, a valve clack is slidably connected in the valve cavity of the valve body, and the valve clack is connected with the valve body. According to the micro-opening type automatic pressure release valve, the sealing gasket and the bottom face of the valve cavity of the valve body are both of a plane structure, plane sealing is improved, PCTFE is adopted as a sealing material, pressure in a system can be normally and rapidly discharged under the working condition that the valve clack is slightly opened, the contraction stroke of the spring is short, triggering is quick, the spring is effectively protected, and the service life of the spring is prolonged. The service life of the spring and the pressure release valve is prolonged, normal operation of the pipeline valve under severe working conditions can be effectively guaranteed by adopting a sealing mode of a plane sealing structure, the corrosion resistance and the high temperature resistance of the valve in corrosive media can be improved by the sealing gasket made of PCTFE materials, and therefore the service life of the valve is prolonged, and the service life of the valve is prolonged. And safe operation of the system is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure relief valves, in particular to a micro-opening automatic pressure relief valve. Background Art

[0002] The pressure relief valve is an important safety device that automatically opens and closes based on the working pressure of the system. It is usually installed on equipment or pipelines in a closed system to protect the safety of the system. It can automatically open and close according to the working pressure of the system to protect equipment and pipelines from damage due to excessive pressure.

[0003] In a traditional pressure relief valve, the sealing structure is pushed up and kept closed by a spring. When the system working pressure is too high, the pressure pushes the sealing structure to open. The traditional sealing structure adopts an arc-shaped docking sealing structure. The pressure discharge speed is slow after the sealing structure is separated, and it is not suitable for normal operation of pipeline valves under harsh working conditions. Utility Model Content

[0004] The disclosed embodiments relate to a micro-opening automatic pressure relief valve, which solves the problem that in a traditional pressure relief valve, a sealing structure is pushed up and kept closed by a spring, and when the system working pressure is too high, the pressure pushes the sealing structure to open, and the traditional sealing structure adopts an arc-shaped docking sealing structure, and the pressure discharge speed is slow after the sealing structure is separated, and it is not suitable for the normal operation of pipeline valves under harsh working conditions.

[0005] In a first aspect of the present disclosure, a micro-opening automatic pressure relief valve is provided, which specifically includes: a valve body, an access end is provided at the bottom of the valve body, a pressure relief port is opened on the right side of the valve body, the pressure relief port is communicated with the inner cavity of the valve body, a valve disc is slidably connected to the interior of the valve cavity of the valve body, a spring pad is movably connected above the valve disc, a tightening nut is provided at the upper end of the valve body, an adjusting sleeve is fixedly connected to the upper end of the inner cavity of the valve body, the adjusting sleeve is fixedly connected to the tightening nut, a spring is sleeved inside the adjusting sleeve, and the lower end of the spring is sleeved on the spring pad.

[0006] In at least some embodiments, a valve cavity bottom groove of an annular structure is provided on the lower surface of the valve cavity of the valve body, and a valve cavity internal thread is provided on the upper end of the valve cavity wall of the valve body.

[0007] In at least some embodiments, an access port is provided through the access end, and an upper end of the access port is connected to the bottom of the valve cavity of the valve body.

[0008] In at least some embodiments, a lower assembly groove with a circular groove structure is provided at the center of the lower surface of the valve flap, and an upper assembly groove with a circular groove structure is provided at the center of the upper surface of the valve flap.

[0009] In at least some embodiments, a sealing gasket is fixedly connected inside the lower assembly groove. The sealing gasket is made of PCTFE material. The lower surface of the sealing gasket is a planar structure. The sealing gasket fits the bottom surface of the valve cavity of the valve body. The spring gasket is slidably connected inside the upper assembly groove.

[0010] In at least some embodiments, the opening of the adjustment sleeve faces the spring pad, an exhaust hole is longitudinally provided through the center of the adjustment sleeve, and an adjustment thread is provided on the outer surface of the adjustment sleeve.

[0011] In at least some embodiments, the adjusting thread is spirally connected to the inner thread of the valve cavity, and the adjusting thread is spirally connected to the tightening nut.

[0012] The utility model provides a micro-opening automatic pressure relief valve, which has the following beneficial effects:

[0013] The sealing gasket and the bottom surface of the valve body cavity of the micro-opening automatic pressure relief valve in the utility model are both flat structures, and the use of flat seal is improved. PCTFE is used as the sealing material. When the valve disc is slightly opened, the pressure in the system can be discharged normally and quickly. The spring has a short contraction stroke and is triggered quickly, which effectively protects the spring and increases the service life of the spring and the pressure relief valve.

[0014] In addition, compared with traditional pressure relief valves, the sealing method using a flat sealing structure in the present application can more effectively ensure the normal operation of the pipeline valve under harsh working conditions. The sealing gasket made of PCTFE material can improve the corrosion resistance and high temperature resistance of the valve in corrosive media, thereby extending the service life of the valve and ensuring the safe operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0016] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0017] In the attached picture:

[0018] Figure 1 A schematic diagram showing the overall structure of the present application;

[0019] Figure 2 It shows a schematic diagram of the structure of the pressure relief valve of the present application in a separated state;

[0020] Figure 3 A schematic diagram showing the internal structure of the pressure relief valve of the present application is shown;

[0021] Figure 4 It shows a schematic structural diagram of the pressure relief valve of the present application in a closed state;

[0022] Figure 5 It shows a schematic structural diagram of the pressure relief valve of the present application in a pressure relief state;

[0023] Figure 6 The structural schematic diagram of the valve body of the present application is shown;

[0024] Figure 7 A schematic structural diagram of the valve flap of the present application is shown.

[0025] Reference numerals list

[0026] 1. Valve body; 101. Valve cavity bottom groove; 102. Valve cavity inner thread; 2. Access end; 201. Access port; 3. Pressure relief port; 4. Valve disc; 401. Lower assembly groove; 402. Sealing gasket; 403. Upper assembly groove; 5. Spring gasket; 6. Tightening nut; 7. Adjusting sleeve; 701. Exhaust hole; 702. Adjusting thread; 8. Spring. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example 1: Please refer to Figures 1 to 7 :

[0029] The utility model proposes a micro-opening automatic pressure relief valve, comprising: a valve body 1, an access end 2 is provided below the valve body 1, the pressure relief valve is connected to the system through the access end 2, a pressure relief port 3 is opened on the right side of the valve body 1, the pressure relief port 3 is communicated with the inner cavity of the valve body 1, a valve disc 4 is slidably connected inside the valve cavity of the valve body 1, a spring pad 5 is movably connected above the valve disc 4, a tightening nut 6 is provided at the upper end of the valve body 1, an adjusting sleeve 7 is fixedly connected to the upper end of the inner cavity of the valve body 1, the adjusting sleeve 7 is fixedly connected to the tightening nut 6, a spring 8 is sleeved inside the adjusting sleeve 7, and the spring 8 The lower end is sleeved with the spring pad 5, and the lower surface of the valve cavity of the valve body 1 is provided with a valve cavity bottom groove 101 with an annular structure, and the upper end of the valve cavity wall of the valve body 1 is provided with a valve cavity internal thread 102, and an access port 201 is penetrated through the inside of the access end 2, and the upper end of the access port 201 is connected to the bottom of the valve cavity of the valve body 1, and the inner edge of the valve cavity bottom groove 101 is fitted with the lower surface of the sealing gasket 402, and the outer edge of the sealing gasket 402 is located above the valve cavity bottom groove 101, and the sealing gasket 402 is fitted with the bottom surface of the valve cavity of the valve body 1 to effectively seal the docking inlet 201.

[0030] In the embodiment of the present disclosure, a lower assembly groove 401 with a circular groove structure is provided at the center of the lower surface of the valve disc 4, and an upper assembly groove 403 with a circular groove structure is provided at the center of the upper surface of the valve disc 4. A sealing gasket 402 is fixedly connected to the inside of the lower assembly groove 401. The sealing gasket 402 is made of PCTFE material, and the lower surface of the sealing gasket 402 is a planar structure. The sealing gasket 402 is in contact with the bottom surface of the valve cavity of the valve body 1, and the spring gasket 5 is slidably connected to the inside of the upper assembly groove 403; the sealing gasket 402 and the bottom surface of the valve cavity of the valve body 1 are both planar structures, and the use of planar seals is improved. PCTFE is used as the sealing material, so that the pressure in the system can be discharged normally and quickly under the condition that the valve disc is slightly opened. The spring has a short contraction stroke and is triggered quickly, which effectively protects the spring and increases the service life of the spring and the pressure relief valve.

[0031] Embodiment 2, on the basis of embodiment 1, the opening of the adjusting sleeve 7 faces the spring pad 5, and an exhaust hole 701 is provided longitudinally through the center of the adjusting sleeve 7. An adjusting thread 702 is provided on the outer surface of the adjusting sleeve 7, and the adjusting thread 702 is spirally connected to the inner thread 102 of the valve cavity, and the adjusting thread 702 is spirally connected to the tightening nut 6; when the pressure relief valve is assembled, the adjusting sleeve 7 and the valve body 1 are connected by the spiral connection between the adjusting thread 702 and the inner thread 102 of the valve cavity, and the height of the adjusting sleeve 7 inside the valve body 1 can be adjusted, the compression force of the spring 8 can be adjusted, and the tightening nut 6 is fixedly installed on the top of the valve body 1 through the spiral connection between the tightening nut 6 and the adjusting thread 702, so as to realize the assembly of the valve body, and the height of the adjusting sleeve 7 can be adjusted to change the distance between the two ends of the spring 8, thereby changing the pushing force applied by the spring 8 to the spring pad 5, so as to realize the adjustment of the pressure relief pressure.

[0032] The working principle of this embodiment is as follows: first, the pressure relief valve is installed into the protected pipeline system through the access end 2. Under normal conditions, the spring pad 5 and the valve disc 4 are tightly pushed toward the bottom of the valve cavity of the valve body 1 under the elastic force of the spring 8, so that the sealing pad 402 is tightly fitted with the bottom surface of the valve cavity of the valve body 1, and the docking inlet 201 is sealed to make the pressure relief valve in a sealed state. When the pressure in the pipeline is greater than the pushing force of the spring 8 on the spring pad 5, the valve disc 4 is pushed upward under the pressure in the access port 201, so that the sealing pad 402 is separated from the bottom surface of the valve cavity of the valve body 1, so that the access port 201 is connected with the valve cavity of the valve body 1, and is connected with the pressure relief port 3, so that the high-pressure fluid is discharged from the pipeline through the pressure relief port 3, thereby achieving the effect of pressure relief and protecting the equipment and pipeline from damage by excessive pressure.

[0033] In this article, there are a few points to note:

[0034] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0035] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0036] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. Micro-opening automatic pressure relief valve, characterized in that: include: A valve body (1), wherein an access end (2) is provided at the bottom of the valve body (1), a pressure relief port (3) is provided on the right side of the valve body (1), the pressure relief port (3) is communicated with the inner cavity of the valve body (1), a valve flap (4) is slidably connected to the inside of the valve cavity of the valve body (1), a spring pad (5) is movably connected to the top of the valve flap (4), a tightening nut (6) is provided at the upper end of the valve body (1), an adjusting sleeve (7) is fixedly connected to the upper end of the inner cavity of the valve body (1), the adjusting sleeve (7) is fixedly connected to the tightening nut (6), a spring (8) is sleeved inside the adjusting sleeve (7), and the lower end of the spring (8) is sleeved to the spring pad (5).

2. The micro-opening automatic pressure relief valve according to claim 1 is characterized in that: The lower surface of the valve cavity of the valve body (1) is provided with a valve cavity bottom groove (101) of an annular structure, and the upper end of the valve cavity wall of the valve body (1) is provided with a valve cavity internal thread (102).

3. The micro-opening automatic pressure relief valve according to claim 1 is characterized in that: An access port (201) is provided through the access end (2), and the upper end of the access port (201) is connected to the bottom of the valve cavity of the valve body (1).

4. The micro-opening automatic pressure relief valve according to claim 1 is characterized in that: A lower assembly groove (401) with a circular groove structure is provided at the centre of the lower surface of the valve flap (4), and an upper assembly groove (403) with a circular groove structure is provided at the centre of the upper surface of the valve flap (4).

5. The micro-opening automatic pressure relief valve according to claim 4 is characterized in that: A sealing gasket (402) is fixedly connected inside the lower assembly groove (401). The sealing gasket (402) is made of PCTFE material. The lower surface of the sealing gasket (402) is a flat structure. The sealing gasket (402) fits the bottom surface of the valve cavity of the valve body (1). The spring gasket (5) is slidably connected inside the upper assembly groove (403).

6. The micro-opening automatic pressure relief valve according to claim 1, characterized in that: The opening of the adjustment sleeve (7) faces the spring pad (5), an exhaust hole (701) is longitudinally penetrated through the center of the adjustment sleeve (7), and an adjustment thread (702) is provided on the outer surface of the adjustment sleeve (7).

7. The micro-opening automatic pressure relief valve according to claim 6 is characterized in that: The adjusting thread (702) is spirally connected to the thread (102) inside the valve cavity, and the adjusting thread (702) is spirally connected to the tightening nut (6).

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