CN203420962U

CN203420962U - Pneumatic valve double-way oil returning device

Info

Publication number: CN203420962U
Application number: CN201320388353.4U
Authority: CN
Inventors: 辛宝岐
Original assignee: TIANJIN QIANGANG GAS EQUIPMENT TECHNOLOGY Co Ltd
Current assignee: TIANJIN QIANGANG GAS EQUIPMENT TECHNOLOGY Co Ltd
Priority date: 2013-06-28
Filing date: 2013-06-28
Publication date: 2014-02-05
Anticipated expiration: 2023-06-28

Abstract

The utility model discloses a pneumatic valve double-way oil returning device which comprises a large-diameter pneumatic valve and a small-diameter pneumatic valve. The large-diameter pneumatic valve and the small-diameter pneumatic valve are connected in parallel between an oil way inlet and an oil way outlet. Compared with the prior art, the pneumatic valve double-way oil returning device has the advantages that the occurrence of an oil injection accident caused by ultrahigh excess pressure of one-way oil returning in the oil returning operation can be avoided and the environment is prevented from being polluted; meanwhile, the pneumatic valve double-way oil returning device is simple in structure and compared with an electromagnetic valve in the prior art, the pneumatic valve double-way oil returning device is low in fault rate, easy to replace and repair and capable of saving the production cost.

Description

Pneumatic valve two-way oil return apparatus

Technical field

The utility model relates to gas-fired equipment technical field, particularly relates to a kind of pneumatic valve two-way oil return apparatus.

Background technique

In solenoid valve, there is airtight chamber, at diverse location, have through hole, each hole connects different oil pipes, in the middle of chamber, is piston, two sides is two blocks of electromagnet, which side the magnet coil energising valve body of which face will attracted to, and open or close different oil drainage holes, and oil inlet hole often opened by the movement of control valve body, hydraulic oil will enter different oil exit pipes, then by oily pressure, promote the piston of oil cylinder, piston drives again piston rod, piston rod driving mechanical device.By controlling the current switching of electromagnet, just controlled mechanical motion like this.

But, when using the oil return of solenoid valve single channel, find that it has following defect:

1. because oil return solenoid valve is not Sealing, very easily gas leak of the oil leakage, especially, when oil pressure is too high, easily washes oil exit pipe open, and pressure transfer cannot be done work;

2. busy the having of oil return solenoid valve do not opened or the not phenomenon generation of return;

3. easy oil spout when single channel oil return overbottom pressure is too high, because its caliber is thicker, when overbottom pressure is higher, differential pressure switch has little time reaction gas and just sprays and gone, and has also caused the pollution of atmosphere the damnous while to user.

Model utility content

The purpose of this utility model is for the technological deficiency existing in prior art, and a kind of good airproof performance be provided, be difficult for oil spout, the pneumatic valve two-way oil return apparatus of safety and stability.

For realizing the technological scheme that the purpose of this utility model adopts, be: pneumatic valve two-way oil return apparatus, it is characterized in that it comprises Large Diameter Pipeline pneumatic valve and pipe with small pipe diameter pneumatic valve, described Large Diameter Pipeline pneumatic valve and pipe with small pipe diameter pneumatic valve are parallel between oil circuit entrance and oil circuit outlet.

Preferably, described Large Diameter Pipeline pneumatic valve is 1 cun of pneumatic valve.

Preferably, described pipe with small pipe diameter pneumatic valve is 3/8 cun of pneumatic valve.

Working principle of the present utility model is: when oil return system starts oil return, Large Diameter Pipeline pneumatic valve and pipe with small pipe diameter pneumatic valve are opened simultaneously, can be improved oil return efficiency like this, save the oil return time; When oil return operation, carry out, after a period of time, Large Diameter Pipeline pneumatic valve cutting out, pipe with small pipe diameter pneumatic valve continues oil return; When having combustion gas to get back to fuel tank, because the caliber of pipe with small pipe diameter pneumatic valve is thinner, can play certain metering function, so combustion gas gets back to fuel tank and give and to have reserved certain reaction time to differential pressure switch, thereby finish oil return.

Compared with prior art, pneumatic valve two-way oil return apparatus of the present utility model can be avoided the too high generation that causes oil-spraying of single channel oil return overbottom pressure when oil return is worked, and has avoided environmental pollution; Meanwhile, the utility model pneumatic valve two-way oil return apparatus is simple in structure, and than solenoid valve of the prior art, its failure rate is low, is easy to change and maintenance, can save cost of production.

Accompanying drawing explanation

Figure 1 shows that the structural representation of pneumatic valve two-way oil return apparatus of the present utility model.

In figure: the 1st, Large Diameter Pipeline pneumatic valve, the 2nd, pipe with small pipe diameter pneumatic valve, the 3rd, oil circuit entrance, the 4th, oil circuit outlet.

Embodiment

Below in conjunction with specific embodiment, the utility model is described in further detail.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.

Embodiment:

Be illustrated in figure 1 pneumatic valve two-way oil return apparatus, comprise Large Diameter Pipeline pneumatic valve 1 and pipe with small pipe diameter pneumatic valve 2, described Large Diameter Pipeline pneumatic valve 1 and pipe with small pipe diameter pneumatic valve 2 are parallel between oil circuit entrance 3 and oil circuit outlet 4.

Preferably, described Large Diameter Pipeline pneumatic valve 1 is 1 cun of pneumatic valve, and caliber specification is 19.

Preferably, described pipe with small pipe diameter pneumatic valve 2 is 3/8 cun of pneumatic valve, and caliber specification is 10.

When oil return system starts oil return, Large Diameter Pipeline pneumatic valve 1 and pipe with small pipe diameter pneumatic valve 2 are opened simultaneously, can improve oil return efficiency like this, save the oil return time; When oil return operation, carry out, after 6 minutes, Large Diameter Pipeline pneumatic valve 1 cutting out, pipe with small pipe diameter pneumatic valve 2 continues oil return; When having combustion gas to get back to fuel tank, because the caliber of pipe with small pipe diameter pneumatic valve 2 is thinner, can play certain metering function, so combustion gas gets back to fuel tank and give and to have reserved certain reaction time to differential pressure switch, thereby finish oil return.

From aforesaid operations process, be easy to draw, pneumatic valve two-way oil return apparatus of the present utility model can be avoided the too high generation that causes oil-spraying of single channel oil return overbottom pressure when oil return is worked, and has avoided environmental pollution; Meanwhile, the utility model pneumatic valve two-way oil return apparatus is simple in structure, and than solenoid valve of the prior art, its failure rate is low, is easy to change and maintenance, can save cost of production.

The above is only preferred implementation of the present utility model; it should be noted that; for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. pneumatic valve two-way oil return apparatus, is characterized in that it comprises Large Diameter Pipeline pneumatic valve and pipe with small pipe diameter pneumatic valve, and described Large Diameter Pipeline pneumatic valve and pipe with small pipe diameter pneumatic valve are parallel between oil circuit entrance and oil circuit outlet.

2. pneumatic valve two-way oil return apparatus according to claim 1, is characterized in that described Large Diameter Pipeline pneumatic valve is 1 cun of pneumatic valve.

3. pneumatic valve two-way oil return apparatus according to claim 1, is characterized in that described pipe with small pipe diameter pneumatic valve is 3/8 cun of pneumatic valve.