CN201377421Y

CN201377421Y - Unloading valve of pneumatic compressor

Info

Publication number: CN201377421Y
Application number: CN200920146048U
Authority: CN
Inventors: 张忠家; 孙艳; 王利成
Original assignee: TIANJIN HI-TECH INDUSTRIAL Co Ltd
Current assignee: TIANJIN HI-TECH INDUSTRIAL Co Ltd
Priority date: 2009-03-25
Filing date: 2009-03-25
Publication date: 2010-01-06
Anticipated expiration: 2019-03-25

Abstract

The utility model relates to an unloading valve of a pneumatic compressor, comprising a valve body, a valve cage arranged outside the valve body, a valve cover arranged at the upper end of the valve cage, and an air inlet positioned at the upper part of the valve cover; a piston is arranged inside the valve cover and is provided with a piston ring; the lower end of the piston is provided with a piston return spring, the piston is matched with a sub-hole, a piston push rod is matched with a three-jaw jacking device, the lower end of which is matched with a valve sheet, and the three-jaw jacking device is internally provided with a return spring. The original air valve of a booster is improved, and jacking pressure of gas is utilized to compress the spring, so that the valve sheet is in a normally open state, and an air current channel is formed, thus realizing pressure unloading in an air cylinder of the compressor; when the air inlet pressure is lower than the pressure needed by use, the jacking gas can be closed, and the compression force jacking device of the spring can be used for leading the valve sheet to move within an effective stroke, so that the functions of the common valve body can be realized, and the normal work of the booster can be ensured.

Description

Unloading valve for pneumatic compressor

Technical field

The utility model relates to a kind of valve that is used for the compresser cylinder unloading pressure.

Background technique

Do not have on the oil trial-production compressor at the CTG rock gas,, can cause damage, pressure-increasing machine can not normally be worked air valve and cylinder because the source of the gas suction pressure instability of cylinder air inlet when suction pressure is excessive, does not have the standard valve of unloading the valve function if adopt.

Summary of the invention

Technical problem of the present utility model is that a kind of unloading valve for pneumatic compressor will be provided, it utilizes the jacking pressure pressure spring of gas, the state that valve block is in often open forms current path, thereby realizes the discharge degree in the compresser cylinder, when being lower than, uses when needing pressure suction pressure, can close jacking gas again, utilize the compressive force top return device of spring, valve block can be moved in effective travel, thereby realize the function of common valve seat, make the pressure-increasing machine proper functioning.

The purpose of this utility model is achieved in that a kind of unloading valve for pneumatic compressor, comprise valve body, valve body is outward a valve cage, and the valve cage upper end is a valve gap, valve gap top is provided with suction port, the piston setting is in the valve gap, and piston ring is housed on the piston, and the piston lower end is provided with piston reset spring, piston matches with the rim of the mouth, piston push rod matches with the three-jaw jacking mechanism, and matching with valve block in three-jaw jacking mechanism lower end, is provided with return spring in the three-jaw jacking mechanism.The cue mark of piston tip places transparent cover.

The unloading valve for pneumatic compressor that the utility model provides, on valve gap, increase a suction port, install a piston apparatus in the middle of the valve gap additional, utilize piston ring and O type circle to seal and lead, make the suction port gas pressure fully stressed, piston is moved in limited stroke in piston end surface, the track bar of piston end just can directly act on the stress surface on unloading valve seat top, thereby the jacking valve block makes it overcome external force and opens, and realizes offloading functions; Lowermost end in piston stroke is provided for piston is carried out spacing rim of the mouth, when the pressure of jacking gas excessive, when spring force can not overcome the pressure of jacking gas fully, the pressure of redundance can be carried in the rim of the mouth, thereby the stroke of control piston is in limited distance, be the working stroke of valve block in valve seat, so can the excessive damage that causes valve block of stroke excessive because of the pressure of jacking gas or piston, guaranteed the proper functioning of feather valve; Piston reset spring and return spring, the lower end of the lower end of piston and feather valve top stress surface in valve gap respectively, when the cylinder intake mouth pressure is lower than the pressure of need of work, close jacking gas, utilize spring force can push up back the three-jaw stressing device of piston and feather valve, make valve block return to normal working position, thereby the pressure-increasing machine cylinder can be worked normally; Valve seat uses the jacking mechanism of three-jaw, and the pressure of the suffered piston thrust bar of the stress surface on valve seat top is evenly distributed on the valve block, makes valve block can not cause damage because of unbalance stress; The transparent cover of the setting on valve gap top and the indicative mark of piston tip can see clearly whether the jacking gas pressure makes the feather valve proper functioning.

Description of drawings

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

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is an A-A sectional view among Fig. 1.

Embodiment

As Fig. 1 and shown in, the utility model comprises valve body 1, is valve cage 2 outside the valve body 1, and valve cage 2 upper ends are valve gap 3, valve gap 3 tops are provided with suction port 4, piston 5 is provided with and is in the valve gap 3 piston ring 6 to be housed on the piston 5, and piston 5 lower ends are provided with piston reset spring 10, piston 5 matches with rim of the mouth 14, piston push rod 7 matches with three-jaw jacking mechanism 8, and matching with valve block 9 in three-jaw jacking mechanism 8 lower ends, is provided with return spring 11 in the three-jaw jacking mechanism 8.The cue mark 12 on piston 5 tops places transparent cover 13.

Working principle of the present utility model is as follows: when cylinder intake pressure during more than or equal to the pressure of need of work, open the switch of jacking gas on the valve gap 3, make gas enter valve gap 3, act on piston end surface, depress piston 5, piston 5 is moved in fixed journey system, piston push rod 7 acts on the top stress surface of feather valve three-jaw jacking mechanism 8, makes three-jaw act on valve block 9, the state that valve block is in often open, form the path of air-flow, to realize the unloading of compresser cylinder.When cylinder intake pressure during less than need of work pressure, close the switch of jacking gas on the valve gap 3, utilize piston reset spring 10 spring forces to push back piston 5, utilize the spring force of return spring 11 to push back three-jaw jacking mechanism 8, make air valve return to normal working position, thereby the pressure-increasing machine cylinder can be worked normally.

Lowermost end in piston stroke is provided for piston 5 is carried out spacing rim of the mouth 14, when the pressure of jacking gas excessive, when piston reset spring 10 can not overcome the pressure of jacking gas fully, the pressure of redundance can be carried in rim of the mouth 14, thereby the stroke of control piston 5 is in limited distance, be the working stroke of valve block 9 in valve body 1, so can the excessive damage that causes valve block 9 of stroke excessive because of the pressure of jacking gas or piston 5, guaranteed the proper functioning of feather valve.

The cue mark 12 on piston 5 tops adopts red application, places transparent cover 13, can be clear that intuitively whether the jacking gas pressure makes the feather valve proper functioning.

Claims

1, a kind of unloading valve for pneumatic compressor, comprise valve body (1), valve body (1) is outer to be valve cage (2), valve cage (2) upper end is valve gap (3), it is characterized in that: valve gap (3) top is provided with suction port (4), piston (5) setting is in the valve gap (3), piston ring (6) is housed on the piston (5), piston (5) lower end is provided with piston reset spring (10), piston (5) matches with rim of the mouth (14), piston push rod (7) matches with three-jaw jacking mechanism (8), and matching with valve block (9) in three-jaw jacking mechanism (8) lower end, is provided with return spring (11) in the three-jaw jacking mechanism (8).

2, unloading valve for pneumatic compressor according to claim 1 is characterized in that: the cue mark (12) on piston (5) top places transparent cover (13).