CN206130511U

CN206130511U - Return check valve of filter screen is put to in -band

Info

Publication number: CN206130511U
Application number: CN201621155459.XU
Authority: CN
Inventors: 张清源
Original assignee: Shock Compressor (shanghai) Co Ltd
Current assignee: Shock Compressor (shanghai) Co Ltd
Priority date: 2016-10-31
Filing date: 2016-10-31
Publication date: 2017-04-26
Anticipated expiration: 2026-10-31

Abstract

The utility model discloses a return check valve of filter screen is put to in -band. It includes case, spring, the restricted aperture who connects gradually from the export that enters the mouth, is equipped with built -in filter screen before the case of valve entrance, the mesh size of built -in filter screen is less than restricted aperture's size, the return check valve is equipped with the round arch on the inner wall of valve entrance, built -in filter screen is shelved in this the round arch on the valve inner wall. The utility model discloses a return check valve of filter screen is put to in -band because the restricted aperture anterior segment has been add the mesh size and is less than the built -in filter screen of restricted aperture size in the return check valve, in case there is the impurity that is greater than restricted aperture, then embedded filter and was stopped, can not block up restricted aperture, can guarantee the normal operating of air compressor machine.

Description

Return check valve with built-in screen pack

Technical field

The utility model belongs to lubricating utensil technical field, is related to a kind of return check valve with built-in screen pack.

Background technology

The return check valve of air compressor lubricating oil system is less due to metering hole, it is easy to block, once blocking will be led Cause air compressor machine oil consumption to increase, cause air compressor machine oil starvation.

The metering hole size of return check valve be pore size typically in 0.8～3mm, due to aperture it is less, once oil is thin There are some little impurity in separator (such as：The impurity such as fluid sealant, the raw material band being present in oily fine separator), impurity will be by The current limliting hole plug of return check valve, causes that oily fine separator oil return is not smooth, and lubricating oil will be taken away by compressed air, causes profit Lubricating oil is lost in, and increases air compressor machine oil consumption, and causes air compressor machine oil starvation to shut down.

Utility model content

The purpose of this utility model is：Overcome the deficiencies in the prior art, there is provided in the band that a kind of metering hole is not easily blocked Put the return check valve of screen pack.

The technical solution of the utility model is as follows：

A kind of return check valve with built-in screen pack, it includes valve element, spring, the limit being sequentially connected from the inlet to the outlet Discharge orifice, was provided with built-in screen pack before valve element at valve inlet, and the mesh size of the built-in screen pack is less than metering hole Size.

Further, a circle is provided with inwall of the return check valve at valve inlet raised, the built-in filtration Net is shelved in this circle projection on valve inwall.

Further, the built-in screen pack is detachable screen pack, and removable unloading down is cleaned or changed.

Further, the built-in screen pack is stainless steel or plastic material.

Further, the mesh size of the built-in screen pack is less than 0.8mm.

The beneficial effects of the utility model：

Return check valve with built-in screen pack of the present utility model, because metering hole leading portion is set up in return check valve Mesh size once there is the impurity more than metering hole, is then built screen pack mistake less than the built-in screen pack of metering hole size Filtration resistance is blocked, will not clogging flow restriction hole, can guarantee that the normal operation of air compressor machine.

Return check valve with built-in screen pack of the present utility model, has the advantage that：

(1) built-in screen pack is set up in metering hole leading portion, mesh size (i.e. barrel hole size) is less than the size of metering hole, no With worry metering hole blockage problem.

(2) built-in screen pack can filter out big impurity particle, and the lubricating oil that can guarantee that into head does not have bulky grain Impurity, it is ensured that the normal operation of head.

Description of the drawings

Fig. 1 is a kind of structural representation of the return check valve with built-in screen pack of the utility model；

Fig. 2 is the workflow schematic diagram of the air compressor lubricating oil system containing return check valve.

In figure：1st, return check valve 2, valve element 3, spring 4, metering hole 5, built-in screen pack 6, oily fine separator 7, Compressor host

Specific embodiment

The utility model is further described below in conjunction with drawings and Examples.

Embodiment 1

As shown in figure 1, a kind of return check valve 1 with built-in screen pack of the utility model, it is included from the inlet to the outlet Valve element 2, spring 3, the metering hole 4 being sequentially connected, was provided with built-in screen pack 5, built-in screen pack before valve element 2 at valve inlet Size of 5 mesh size less than metering hole.

The metering hole size of return check valve is more than or equal to 0.8mm, and the mesh size of built-in screen pack 5 is less than 0.8mm.It is interior It is stainless steel filter screen to put screen pack 5, and return check valve 1 is provided with circle projection, built-in mistake on the inwall at valve inlet Filter screen 5 is shelved in this circle projection on valve inwall.

The built-in screen pack is detachable screen pack, when the impurity deposited on built-in screen pack 5 is too many, can will be interior Put screen pack 5 and disassemble and cleaned or changed.

The workflow of air compressor lubricating oil system is as shown in Fig. 2 the oily Jing oil return pipes isolated of oily fine separator 6, Jing Return check valve 1 (filtering by built-in screen pack 5) is crossed, compressor host 7 is returned to.

In the utility model, because metering hole leading portion is additionally arranged the built-in mistake of below mesh 0.8mm in return check valve Filter screen, once there is the impurity more than metering hole (more than 0.8mm), is then built filter screen filtration obstruction, will not clogging flow restriction hole, Can guarantee that the normal operation of air compressor machine.

Claims

1. a kind of return check valve with built-in screen pack, it is characterised in that it includes the valve being sequentially connected from the inlet to the outlet Core, spring, metering hole, were provided with built-in screen pack before valve element at valve inlet, and the mesh size of the built-in screen pack is little In the size of metering hole.

2. the return check valve with built-in screen pack as claimed in claim 1, it is characterised in that the return check valve is in valve The inwall of door porch is provided with circle projection, and the built-in screen pack is shelved in this circle projection on valve inwall.

3. the return check valve with built-in screen pack as claimed in claim 1 or 2, it is characterised in that the built-in screen pack For detachable screen pack.

4. the return check valve with built-in screen pack as claimed in claim 1 or 2, it is characterised in that the built-in screen pack For stainless steel or plastic material.

5. the return check valve with built-in screen pack as claimed in claim 1 or 2, it is characterised in that the built-in screen pack Mesh size be less than 0.8mm.