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Valve core, poppet valve and application of same

A lift valve and spool technology, applied in lift valves, valve operation/release devices, valve details, etc., can solve the problems of high-pressure gas consumption and low efficiency, and achieve simple and easy operation, easy manufacture, and simple appearance Effect

Active Publication Date: 2017-01-04
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a conventional pneumatic GM refrigerator, the movement of the pushing piston is driven by the high-pressure gas from the compressor through the driving piston. Although the structure is simple, it consumes part of the high-pressure gas from the compressor, so the efficiency is low

Method used

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  • Valve core, poppet valve and application of same
  • Valve core, poppet valve and application of same
  • Valve core, poppet valve and application of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A spool such as figure 1 As shown, the valve core 2 includes a valve body 21, a valve seat 23, a valve spring 22 and a valve needle 24. After the valve seat 23 is connected with the valve body 21, a front cavity 26 is formed. The valve spring 22 is arranged in the front cavity 26, and one end thereof Press on the valve body 21 , and the other end presses on the tail end of the valve needle 24 passing through the valve seat 23 to provide the pre-pressure of the valve needle 24 on the valve seat 23 . The valve needle 24 can slide in the valve seat 23 , and the valve seat 23 is provided with a rear cavity 27 . Two fluid ports are opened on the valve body 21 , the first fluid port 251 is in constant communication with the front cavity 26 , the second fluid port 252 is in constant communication with the rear cavity 27 , and the tail end of the valve needle 24 is provided with a protrusion. When the valve needle 24 is at the rightmost end, the protrusion is in close contact ...

Embodiment 2

[0060] A poppet valve such as Figure 4 ~ Figure 6 As shown, it includes a cam assembly 1, a rocker arm assembly and any valve core in Embodiment 1. There are two rocker arm assemblies, respectively the main rocker arm assembly 3 and the auxiliary rocker arm assembly 4, and the main rocker arm assembly 3 and the auxiliary rocker arm assembly 4. The auxiliary rocker arm assemblies 4 are respectively arranged on opposite sides of the cam assembly 1, and there are 5 spools 2 in total, among which, 3 spools 2 connected with the main rocker arm assembly 3 are provided, which are connected with the auxiliary rocker arm assembly 4 The spool 2 is provided with two. Wherein the cam assembly 1 and the rocker arm assembly are located inside the valve body 5 which is composed of a cam box 51 and a cam box cover 52 .

[0061] Such as Figure 7 , Figure 8 As shown, the cam assembly 1 includes a main shaft 11, a first cam 12, a second cam 13, a third cam 14 and a fourth cam 15, the first...

Embodiment 3

[0074] The poppet valve described in Example 2 is used in a vascular expander, and its structure is as follows Figure 14 As shown, there are three spools 2 connected to the main rocker arm assembly 3, wherein the second fluid port 252 of the left spool 2 is connected to the air reservoir 621, the first fluid port 251 is connected to the vessel 61, and the middle valve The first fluid port 251 of the core 2 is connected to the gas reservoir 622, the second fluid port 252 is connected to the vessel 61, the first fluid port 251 of the valve core 2 on the right is connected to the gas reservoir 623, and the second fluid port 252 is connected to the vessel 61 connections.

[0075] There are two spools 2 connected to the auxiliary rocker arm assembly 4, wherein the second fluid port 252 of the left spool 2 is connected to the low-pressure outlet pipeline 632, the first fluid port 251 is connected to the vessel 61, and the right valve The first fluid port 251 of the core 2 is conne...

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Abstract

The invention relates to a valve core, a poppet valve and applications of same; the valve core comprises a valve body, a valve seat and a valve needle; the valve seat is connected with the valve body so as to form a front chamber and a rear chamber respectively connected with the outer side; a valve needle boss can make contacts with the valve seat, and can be separated from the valve seat; the front chamber and rear chamber are not connected when the valve needle boss makes contacts with the valve seat; the front chamber and the rear chamber are connected when the valve needle boss is separated from the valve seat; a balance chamber is arranged between the valve body and the valve needle, and connected with the rear chamber; the poppet valve comprises a cam assembly and the valve core; the cam of the cam assembly drives the valve needle to move, so the front chamber and the rear chamber are connected; compared with the prior art, the valve core and the poppet valve are simpler in structures.

Description

technical field [0001] The invention relates to a valve core, a poppet valve and the application of the poppet valve. Background technique [0002] The multi-gas reservoir pulse tube expander is an expander with no moving parts at low temperature except the valve. It has high theoretical reliability, but it has not been developed and applied so far. The difficulty is the problem of the valve. There are at least 4 valves in a multi-gas storage pulse tube expander, two or more gas storage valves, a high-pressure inlet valve, and a low-pressure outlet valve. The poppet valve is a valve with very little air leakage, which is very suitable for the valve of the pulse tube expander, but the existing poppet valve used for the multi-gas storage pulse tube refrigerator adopts a rocker arm with a bearing, and the cam adopts a specific profile way, the structure is complex and cannot be applied in practice. [0003] The current common poppet valve used in GM refrigerators needs a lot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/00F16K1/38F16K27/02F16K31/52F25B41/04F25B41/20
CPCF16K1/00F16K1/38F16K27/0254F16K31/52F25B41/20
Inventor 朱绍伟
Owner TONGJI UNIV
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