Safety valve of vacuum system

A vacuum system and safety valve technology, applied in safety valves, valve details, balance valves, etc., can solve problems such as uncommon interfaces and unfavorable pressure regulation, and achieve the effects of ensuring universal interface, saving time and cost, and quick replacement

Inactive Publication Date: 2020-04-28
ZHEJIANG BWOKAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides a vacuum system safety valve for the shortcomings of the prior art that the interface is not universal, it is not conducive to pressure regulation, and there is no filtering system.

Method used

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  • Safety valve of vacuum system
  • Safety valve of vacuum system
  • Safety valve of vacuum system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The vacuum system safety valve, as shown in the figure, includes a valve seat 1 and a valve core 3. The valve core 3 is movable and controls the opening and closing of the installed valve. The valve seat 1 includes an air inlet 11 and an air outlet 12. The inlet of the valve seat 1 A filter screen 2 is installed at the air port 11, and the filter screen 2 includes a fine filter screen 21 and a coarse filter screen 22.

[0034] The fine filter screen 21 and the coarse filter screen 22 are arranged in sequence along the gas flow direction, and the fine filter screen 21 is a 150-mesh stainless steel filter screen.

[0035] The fine filter 21 is a 150-mesh stainless steel filter, which is combined with the coarse filter 22 to form the filter system of the safety valve, which is used to shield solid impurities from falling into the safety valve body and prevent solid impurities from affecting the mechanical action of the safety valve; Clean to avoid sealing O-ring contaminat...

Embodiment 2

[0038] Same as the embodiment, the difference is that the air inlet 11 and the air outlet 12 are respectively equipped with an inlet flange interface 111 and an air outlet flange interface 121, the inlet flange interface 111 is a vacuum KF25 interface, and the air outlet flange interface 121 is a vacuum KF40 interface.

[0039] Its interface adopts vacuum KF interface, and the interface adopts standard fluorine rubber O-ring and stainless steel center bracket cage to ensure long-term airtightness and high temperature resistance; after using KF interface, it is guaranteed that the interface of the vacuum system is universal. It simplifies the process of vacuum system design and safety modification.

Embodiment 3

[0041] The same as the embodiment, the difference is that the valve core 3 is fixed in the valve seat 1, and the valve core 3 is provided with a vertically arranged exhaust hole 31, and the ejector rod 4 is installed in the exhaust hole 31, and the ejector rod 4 is close to the inlet. One end of the air port 11 is defined as the lower end, the other end of the ejector rod 4 is defined as its upper end, a sealing ring 6 is installed on the valve core 1, and a spring 5 sleeved on the ejector rod 4 is also included, and the lower end of the spring 5 is connected to the ejector rod. 4 The lower end is in contact, the upper end of the spring 5 is in contact with the spool 3 and pulls the upper end of the ejector rod 4 to press down on the sealing ring 6.

[0042]The lower end of the push rod 4 is provided with an external thread, and the lower end of the push rod 4 is equipped with an adjusting nut 41 cooperating with the external thread, and the lower end of the spring 5 contacts t...

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PUM

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Abstract

The invention relates to the field of valves, and discloses a safety valve of a vacuum system. The safety valve of the vacuum system comprises a valve seat (1) and a valve core (3), wherein the valvecore (3) is movably arranged and controls the opening and closing of an installation valve; the valve seat (1) comprises an air inlet (11) and an air outlet (12); the air inlet (11) of the valve seat(1) is provided with a filter screen (2); and the filter screen (2) comprises at least one fine filter screen (21) and at least one coarse filter screen (22). According to the safety valve, two-stagefilter screen pieces are added at the air inlet, so that solid impurities in the vacuum system can be prevented from entering the safety valve along with airflow during positive pressure exhaust and influencing the normal action of a relief valve core of the safety valve; standardized series design is carried out on an interface, and the interface adopts a standard vacuum KF interface, so that thesealing performance and the high-temperature resistance are guaranteed; and after the KF interface is adopted, the universality of the interface of the vacuum system is guaranteed.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a vacuum system safety valve. Background technique [0002] With the application of vacuum technology in vacuum coating, nuclear fusion, low-temperature superconductivity, aerospace and other fields, the safety of vacuum containers is becoming more and more important. When the internal pipeline of the vacuum container leaks, the amount of gas release increases, or when it is inflated and pressurized, the pressure in the vacuum container increases rapidly, and the vacuum container is prone to deformation, rupture or even explosion. The safety valve used on the traditional pressure pipeline cannot meet the requirements for the reliable opening of some vacuum containers under the pressure close to the ambient background. In order to solve these problems, it is necessary to design and install a safety valve on the vacuum vessel that can be reliably opened at a pressure close to the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K17/06F16K27/02F16L23/032F16L23/22B01D35/04
CPCB01D35/04F16K17/06F16K27/0209F16L23/032F16L23/22
Inventor 陈家富冯寅兵
Owner ZHEJIANG BWOKAI TECH
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