CN200951765Y

CN200951765Y - Light type unloading valve

Info

Publication number: CN200951765Y
Application number: CN 200620097773
Authority: CN
Inventors: 熊阳东; 胡义成
Original assignee: DONGSHUN SHOUDUN AUTOMOBILE PARTS Co Ltd WUHAN
Current assignee: DONGSHUN SHOUDUN AUTOMOBILE PARTS Co Ltd WUHAN
Priority date: 2006-07-13
Filing date: 2006-07-13
Publication date: 2007-09-26
Anticipated expiration: 2016-07-13

Abstract

The utility model relates to a lightweight unloading valve, which comprises a valve body (25), and an upper body (23) and a lower body (26) connected with the valve body (25), wherein the valve body (25) is provided therein with a one-way valve, a safety valve and a pressure adjusting valve; on the front surface of the valve body (25) are only provided two mounting holes (29), or a backup hole (28) for mounting an air sampling valve sub-assembly is mounted below the mounting hole and is connected with an air inlet hole. The utility model has compact and simple structure, symmetric and good appearance, small size, and low manufacture cost, and is specifically suitable for automobile having air sampling device to reduce the operation cost and the mounting size. Additionally, the backup hole of the air sampling valve sub-assembly is independently arranged at the air inlet end of the unloading valve to meet the need for mounting air sampling valve sub-assembly of automobile without air sampling valves.

Description

Light-duty unloading valve

Technical field

The utility model is a kind of light-duty unloading valve.

Background technology

The unloading valve that uses all contains collector and collector boss at present, the unloading valve of this structure is applicable to the automobile that does not contain collector, what this itself contained collector for the automobile brake element then is a kind of unnecessary, it is the cost height not only, increased user's economical burden, and volume is big, the waste resource.

Summary of the invention

Technical problem to be solved in the utility model is: provide a kind of improved type light-duty unloading valve, to overcome the defective that prior art exists.

The technical scheme that its technical matters that solves the utility model adopts is: comprise valve body and the upper body and the lower body that are attached thereto, check valve, safety valve and pressure regulating valve are housed in the valve body.The front of valve body (Fig. 3) has only two mounting holes.

The utility model compared with prior art has following two big advantages:

One. the valve body of this unloading valve does not contain collector and collector boss, so compact conformation, simple, outward appearance symmetry, attractive in appearance, volume is little, and low cost of manufacture is specially adapted to contain the automobile of collector, can reduce its use cost and installation volume.

They are two years old. and at the admission port end of this unloading valve, be provided with the standby hole that the air valve branch unit is independently got in installation, do not get the demand that the air valve branch unit is got in the installation of air valve automobile to satisfy.

Description of drawings

Fig. 1 is an External view of the present utility model.

Fig. 2 is the A-A cutaway view of Fig. 1.

Fig. 3 is the upward view of Fig. 1.

The specific embodiment

The utility model is to improve on the basis of existing unloading valve, mainly is: as Fig. 1, Fig. 2 and shown in Figure 3, comprise valve body 25 and the upper body 23 and the lower body 26 that are attached thereto.Wherein: check valve, safety valve and pressure regulating valve are housed in the valve body 25.See Fig. 3, the front of valve body 26 has only two mounting holes 29, perhaps also is provided with the standby hole 28 that the air valve branch unit is got in an installation below mounting hole, and this hole is communicated with admission port.

The length of above-mentioned valve body 25 is 85～100mm, is generally 92mm.

Below in conjunction with Fig. 2 the utility model is elaborated.

As shown in Figure 2: valve assembly 7, pull back spring 19, equilibrium bomb spring abutment 5, leather cup 6, cover plate 21 are housed on the tappet 8 successively.One sulculus is arranged on the tappet 8, block, form leather cup branch unit 27, insert in the valve body 25 with circlip for shaft 22.Equilibrium bomb spring abutment 5, balance spring 4, balance spring pressing plate 3, setting nut 2, trimming screw 1 and upper body 23 are housed on leather cup branch unit 27, and are fixed on the valve body 25 with four screws 24.

Piston 15 is equipped with in the lower end of valve body 25, and drain tap 11, seal ring 18 are housed on the piston, and exhaust spring 16, exhaust spring seat 14 and lower body 26 are equipped with in the bottom of piston.Valve body lower portion has a groove, with circlip for bore 13 above-mentioned each part is fixed on the valve body.Sequence number 12,17 and 20 is respectively seal ring, packing ring and cover plate.

The right-hand member of valve body 25 is equipped with one-way cock 10, is enclosed within on the small end of tapered spring 9.The big end of cone-shaped spring 9 is stuck in valve body 25 grooves.

Valve body 25 front, left side are provided with the hole that has that the air valve branch unit is independently got in installation.

Sketch principle of work of the present utility model below in conjunction with Fig. 2:

Pressurized air by Air compressor output enters the D chamber from admission port E, and from air extractor duct F output, the part pressurized air arrives the B chamber simultaneously, when the B cavity pressure reaches 810 through one-way cock 10 ^{+ 20}During KPa, leather cup branch unit 27 overcome balance spring 4 precompressed compressions and on move, open valve assembly 7, air pressure promotes piston 15 and moves down, and opens exhaust valve (C place), unloading valve begins exhaust at this moment.When the pressure decay of air extractor duct 60 ^{+ 70}During KPa, because the B cavity pressure descends, leather cup branch unit 27 moves down, and valve assembly 7 is closed, and piston 15 is located exhaust valve (C place) to close under the effect of exhaust spring 16, and Air compressor recovers to system's air feed.

When the said process inefficacy, when causing the system pressure overload, unloading valve in-to-in piston 15 will be opened when the 1300Kpa left and right sides, thereby realize overload protection.

According to automobile vapour road design-calculated needs, when the position that unloading valve is installed is convenient to the driver and is got gas, in the standby hole 28 of unloading valve, can load onto and get the air valve branch unit, if unloading valve needs to be contained in unloading valve within the chassis ridgepole or to be not easy to the place that the driver gets gas in the automobile gas circuit, then the air valve branch unit of getting that is screwed on the unloading valve independently can be backed out, be contained in the air tank in the gas circuit or be convenient to the place that the driver gets gas, and will get the standby hole that air valve is back-outed on the unloading valve, an available screw special is blocked sealing and is got final product.

Claims

1. light-duty unloading valve, the upper body (23) and the lower body (26) that comprise valve body (25) and be attached thereto, it is characterized in that: valve body is equipped with check valve, safety valve and pressure regulating valve in (25); The front of valve body (25) has only two mounting holes (29).

2. light-duty unloading valve according to claim 1 is characterized in that: the length of valve body (25) is 85～100mm.

3. light-duty unloading valve according to claim 1 is characterized in that: also be provided with the standby hole (28) that the air valve branch unit is got in an installation in the below of mounting hole (29), this hole is communicated with admission port.