CN201152362Y

CN201152362Y - Stop valve

Info

Publication number: CN201152362Y
Application number: CNU2007200754339U
Authority: CN
Inventors: 曹扬宝
Original assignee: ZHEJIANG LISHUO COMPRESSOR CO Ltd
Current assignee: ZHEJIANG LISHUO COMPRESSOR CO Ltd
Priority date: 2007-10-15
Filing date: 2007-10-15
Publication date: 2008-11-19
Anticipated expiration: 2017-10-15

Abstract

The utility model relates to a high-low pressure stop valve for an air-condition compressor. The technical problem to be solved is to provide a stop valve which has high sealing reliability and is easy to maintain. The valve core is composed of a valve shaft, a sealed choke plug threaded sleeve, and a sealed choke plug; the sealed choke plug threaded sleeve is sleeved at the front end of the valve shaft; the sealed choke plug is connected with the sealed choke plug threaded sleeve through a thread; the front end of the valve shaft sleeved in the sealed choke plug threaded sleeve and the sealed choke plug is of a T-shaped piston structure; the stop end of the sealed choke plug and the valve base are stopped and sealed through a flexible sealing stop face of a high molecular polymer. The high-low pressure stop valve for the air-condition compressor has the following advantages that: 1. the sealing performance is reliable and the repeating performance is good when the valve is closed; 2. the sealing positive pressure is lower when the valve is closed; 3. the maintenance for the product is good (convenient to use and maintain); 4. the product structure is reasonable, and the technical processing is convenient.

Description

A kind of stop valve

Technical field:

The utility model relates to a kind of high low pressure stop valve that is used for cooler compressor.

Background technique:

In the air conditioner refrigerating compressor, at inside and outside machine connection part the high and low pressure stop valve is housed usually, they are important composition parts of compressor.They are switches of compressor air suction (air inlet) and exhaust (gas transmission).Therefore, stop valve technical performance and manufacturing quality quality not only influence the reliability that compressor performance is good and bad and use, and certainly, also directly affect the integrated quality of whole air-conditioning system.

The structure of high low pressure stop valve used in the prior art is referring to Fig. 1, Fig. 2, and A1 is the valve sealed mouth among the figure; A2 is a valve body; A3 is a valve shaft; A4 is a swivel nut; A5 seals plug screw; A6 is the sealing awl; A7 is a packing ring; A8 is " O " shape seal ring; A9 is a shaft block ring; A10 is a pressure spring.On high low pressure stop valve valve A 2, be provided with outside the outer machine connection mouth that is connected of machine, interior machine connection mouth, the valve sealed mouth that is connected with interior machine, and spool mount inlet is equipped with the spool that outer machine connection mouth can be ended in the valve A 2.Compressor is when the fortune storage, and the stop valve spool that is contained on the outer machine is wanted and outer machine connection mouth can be ended, to prevent the secondary refrigerant leakage in the outer machine; When installing and using, again stop valve is opened, outer machine is communicated with the refrigerant pipe of interior machine, the valve sealed mouth is used for can refrigerant or pressure measurement.

Referring to Fig. 3, the spool of existing stop valve is made up of valve shaft A3, sealing awl A6, shaft block ring A9, pressure spring A10.When stop valve was closed: the valve core axis of stop valve was vertical with sealing surface of seat.Screw pair by spool and valve body are formed for spool provides the sealing positive pressure, makes spool and valve seat positive engagement, guarantees that stop valve reliably closes; When stop valve was opened: the screw pair by spool and valve body are formed also for spool provides reverse lifting force, opened stop valve.When stop valve was opened, the asking to no longer include of spool and sealing surface of seat contacted, thereby the sealing surface mechanical deterioration is minimum.

As seen, be to make and form effective potted line between the front end conical surface of sealing awl A6 and the valve seat and seal in the prior art by spool being applied high positive pressure, thus require the valve core axis of stop valve vertical with sealing surface of seat, the technological requirement strictness; And spiral is paid screw-down torque up to 65N.m, makes stop valve, compressor (comprise compressor install) force-bearing situation abominable; And the product working service is poor, when the product hermeticity energy is defective, can't keeps in repair and can only change by complete machine.

Summary of the invention:

Technical problem to be solved in the utility model provides a kind of stop valve, the sealing reliability height, for ease of maintenaince.

For solving the problems of the technologies described above, the utility model is to propose following technological scheme to realize:

A kind of stop valve is equipped with the spool that connection mouth can be ended in valve body; It is characterized in that: described spool is made up of valve shaft 2, seal plug swivel nut 3, seal plug 4; Seal plug swivel nut 3 is enclosed within valve shaft 2 front ends; Seal plug 4 is connected with seal plug swivel nut 3 by screw thread; The front end that is set in the valve shaft 2 in seal plug swivel nut 3, the seal plug 4 is "T"-shaped piston structure; Between end and valve seat, realizing by sealing of seal plug 4 by high molecular polymer soft seal stop surface.

A kind of structure is to be fixed with high molecular polymer soft seal stop surface on the sealing surface of valve seat, being provided with on end and the identical round ring boss of high molecular polymer soft seal stop surface of seal plug 4.

Another kind of feasible structure be seal plug 4 on end, be fixed with macromolecular material polymer soft seal stop surface, on the sealing surface of valve seat, be provided with and round ring boss that high molecular polymer soft seal stop surface is coincide.

The utility model brings following beneficial effect:

Sealability was reliable when 1, valve cut out, and it is good to repeat performance.

When 2, valve cut out, the sealing positive pressure was less.

3, product maintainability good (working service is convenient).

4, product structure is reasonable, processes is convenient.

Description of drawings:

Fig. 1: the valve body schematic representation of prior art

The A-A sectional view of Fig. 2: Fig. 1

Fig. 3: the valve core structure schematic representation of prior art

Fig. 4: the valve body schematic representation of a preferred embodiment of the utility model

The A-A sectional view of Fig. 5: Fig. 4

Fig. 6: the valve core structure schematic representation of a preferred embodiment of the utility model

Embodiment:

Below in conjunction with the drawings and specific embodiments the utility model is further described:

In conjunction with referring to Fig. 4, Fig. 5, Fig. 6.1 is valve body, and 2 is valve shaft, and 3 is the seal plug swivel nut, and 4 is seal plug, and 5 is swivel nut, and 6 are the sealing plug screw, and 7 is sealing seat, and 8 is packing ring, and 9 is " O " shape seal ring, and 10 is nut, and 11 is seal ring, and 12 for being equipped with the valve sealed mouth of inner spring formula tyre valve core.The macromolecular material polymer is selected teflon for use in the present embodiment.

In the present embodiment, sealing seat 7 is a tight fit in the outer machine connection mouth, constitutes valve seat, is fixed with teflon soft seal stop surface on the sealing seat 7, seals by seal ring 11 between sealing seat 7 and the connection mouth.Spool is made up of valve shaft 2, seal plug swivel nut 3, seal plug 4; Being provided with and the identical round ring boss of teflon soft seal stop surface of seal plug 4 by end.Earlier seal plug swivel nut 3 is put the front end of valve shaft 2 during assembling, again seal plug 4 is connected with seal plug swivel nut 3 by screw thread.

When stop valve is closed, by the screw pair that spool and valve body are formed,, rotate valve shaft 2 for spool provides the sealing positive pressure, make seal plug 4 reaches,, because valve shaft 2 front ends are "T"-shaped piston structure, when seal plug 4 with after sealing seat 7 contacts, seal plug 4 can be with valve shaft 2 transfers, but sealing seat 7 is produced vertical positive power, the teflon soft seal stop surface on round ring boss on the seal plug 4 and sealing seat 7 is connected airtight, and it is identical to make the place of connecting airtight be linear sealing; Thereby avoid frictional loss to teflon soft seal stop surface.

When stop valve was opened: rotate valve shaft 2, move after making seal plug 4, the round ring boss on the seal plug 4 broke away from the teflon soft seal stop surface on the sealing seat 7, and stop valve is opened.

Present embodiment also replaces the Cuprum alloy material of traditional product with aluminum alloy, not only reduced cost, has more solved stop valve and refrigerant R134a compatibility; Product weight is alleviated greatly.

Claims

1, a kind of stop valve is equipped with the spool that connection mouth can be ended in valve body; It is characterized in that: described spool is made up of valve shaft (2), seal plug swivel nut (3), seal plug (4); Seal plug swivel nut (3) is enclosed within valve shaft (2) front end; Seal plug (4) is connected with seal plug swivel nut (3) by screw thread; The front end that is set in the valve shaft (2) in seal plug swivel nut (3), the seal plug (4) is "T"-shaped piston structure; Between end and valve seat, realizing by sealing of seal plug (4) by high molecular polymer soft seal stop surface.

2, according to the described a kind of stop valve of claim 1, it is characterized in that: be on the sealing surface of valve seat, to be fixed with macromolecular material polymer soft seal stop surface, on end, being provided with and the identical round ring boss of high molecular polymer soft seal stop surface of seal plug (4).

3, according to the described a kind of stop valve of claim 1, it is characterized in that: be seal plug (4) on end, be fixed with high molecular polymer soft seal stop surface, on the sealing surface of valve seat, be provided with and round ring boss that high molecular polymer soft seal stop surface is coincide.