CN202327347U

CN202327347U - Outleakage prevention device

Info

Publication number: CN202327347U
Application number: CN2011204561524U
Authority: CN
Inventors: 全龙浩
Original assignee: 全龙浩
Current assignee: Beijing Tianbaili New Technology Development Co., Ltd.
Priority date: 2012-04-18
Filing date: 2012-04-18
Publication date: 2012-07-11
Anticipated expiration: 2022-04-18

Abstract

The utility model discloses an outleakage prevention device, which comprises a valve core component, a sealing gasket A, a sealing gasket B, a bucket sleeve, an expansion ring, a piston and a sliding pressure rod, and is characterized in that: bucket slots are respectively formed on the upper end face and the lower end face of the piston; a circumferential slot is formed on the upper part of an external circle; an internal circle of the rubber expansion ring is bucket-shaped; the diameter of the upper end face of the external circle is less than that of the lower end face of the external circle; the internal circle of the expansion ring is sleeved in a circumferential groove of the piston; and the lower end face of the external circle of the expansion ring is in sliding sealed fit with the inner wall of the bucket sleeve.

Description

A kind of anti-device that leaks outside

Technical field

A kind of anti-device that leaks outside is used for the anti-device that leaks outside of liquid medium flow control, belongs to valve and makes the field.

Background technique

In the rate-of flow system; Control gear is system's imperative equipment, for example, and various valves or mechanical switch etc.; The work of these equipment generally all be unable to do without lever principle; The switch of its valve comes the unlatching of control valve and the size of flow by lever shaft, and in order to prevent seepage, the seal arrangement of being made by rubber seals around the lever shaft; But because the continuous use of equipment, with the passing of time the friction between lever shaft and the seal arrangement causes the wearing and tearing of seal arrangement, causes medium to leak outside, all employing lever shaft technology of existing valve, leaking outside, it is inevitable to become basically.

The inventor proposes by " a kind of leakproof thermostatic valve of adjustable KV value " in 200910237130.6 patent application, has proposed the anti-a kind of method that leaks outside, and this technological scheme can solve the problem that medium leaks outside easily; But, reality finds that because valve purposes, form are inequality, therefore most of control valve need not adjusted the KV value when using; Structure division as with adjustable KV value removes, and has not only saved the manufacture cost of valve, and in the leak source, the device of will preventing leaking outside is further optimized, and makes structure more reasonable, and is more succinct, uses convenient outside reducing.

Summary of the invention

The purpose of this invention is to provide a kind of anti-constructional device that leaks outside that is used for the Lever type valve, be applicable to valve straight-through, the threeway class; Technological scheme of the present invention realizes like this, mainly by mangetic core assembly, and seal ring A, piston, dowel bar, packing, the drum cover, seal ring B, the slip depression bar is formed; The upper and lower end face of piston has cylindrical tank respectively, and circumferential groove is arranged at cylindrical top; Circle is round barrel shape in the rubber packing, and excircle part upper and lower end face diameter is up-small and down-big, and circle is contained in the circumferential groove of piston in the packing, and the cylindrical lower end surface of packing cooperates with the inwall slipper seal of drum cover; Mangetic core assembly is sealed in the valve body chamber by fixed seal ring, has only the slip depression bar in seal ring B, to move up and down, and the cylindrical tank of the lower end surface of piston is withstood in the upper end portion of slip depression bar, and the upper-end surface cylindrical tank of piston withstands the thermometer bulb depression bar of temperature control head; The underpart of drum cover is connected with cartridge cover through seal ring A, and cartridge cover is connected with valve body through seal ring A.In case valve leaks outside, be enclosed within the inside and outside pressure reduction that forms of rubber packing on the piston, under the effect of pressure medium, rubber packing lateral expansion blocks outer leak source.

The invention has the beneficial effects as follows, comparatively thoroughly solved the problem that valve leaked after operation a period of time, structure is changed a little can realize operation or manually-operable automatically.

Description of drawings

Accompanying drawing is for adopting the valve partial structurtes figure of apparatus of the present invention.

Fig. 1 is for adopting automatic operation mode.

Fig. 2 is for adopting manual work pattern..

In the accompanying drawing: 1 mangetic core assembly, 2 seal ring A, 3 pistons, 4 dowel bars, 5 packings, 6 drum covers, 7 seal ring B, 8 slip depression bars, 9 manual handles, 10 screw rods.

Embodiment

Carry out the elaboration of mode of execution below in conjunction with Figure of description.

The present invention is at the application example of thermostat valve, and Fig. 1 is automatic operation mode partial structurtes schematic representation, mainly by mangetic core assembly (1), and seal ring A (2), piston (3), dowel bar (4), packing (5), drum cover (6), seal ring B (7), slip depression bar (8) is formed; The upper and lower end face of piston (3) has cylindrical tank respectively, and circumferential groove is arranged at cylindrical top; Circle is round barrel shape in the rubber packing (5), and the diameter of excircle part upper and lower end face is up-small and down-big, and circle is sleeved in the circumferential groove of piston (3) in the packing (5), and the cylindrical lower end surface of packing (5) cooperates with the inwall slipper seal of drum cover (6); Mangetic core assembly (1) is sealed in the valve body chamber by fixed seal ring (2); Have only slip depression bar (8) in seal ring B (7), to move up and down, the cylindrical tank of the lower end surface of piston (3) is withstood in the upper end portion of slip depression bar (8), and the upper-end surface cylindrical tank of piston (3) withstands the thermometer bulb depression bar of temperature control head; During normal operation in normal; Move up and down under piston (3) promotion of active force outside, promote slip depression bar (8) and move up and down, reach and open or the purpose of throttle down; The underpart of drum cover (6) is connected with cartridge cover through seal ring A (2), and cartridge cover is connected with valve body through seal ring A (2).The principle of leakproof is work like this; Work as valve working; Slip depression bar (8) and the long-term friction of seal ring B (7) can cause seal ring B (7) wearing and tearing, and current will ooze out, flow out from fray; To bring irremediable loss to the user when serious, seepy question is an inevitably defective of existing valve (for example thermostat valve).When the present invention is leaked in generation seal ring B (7) wearing and tearing; The water that spills gets in the drum cover (6) of sealing; In case when having water between the inwall of packing (5) and drum cover (6), to ooze out; At the inside and outside formation pressure reduction that leaks out of packing (5), the hydraulic pressure in the drum cover (6) tightly is pressed in the great circle of the outer half dog points of packing (5) on the inwall of drum cover (6) immediately, and seepage stops; In theory; This seepage can take place hardly, in case because seal ring B (7) weares and teares when leaking, the drum cover has been full of the medium that certain pressure is arranged in (6); Because there is an angle packing (5) cylindrical upper and lower end face; Under the effect of hydraulic pressure, it tightly laterally is pressed in the inwall of drum cover (6), can not there be water to ooze out from packing; Solved the leakage problems of valve comparatively up hill and dale.Accompanying drawing 2 is these routine manual mode partial structurtes figure; The upper end of drum cover (6) is designed with thread bush (10); The screw-thread fit of thread bush (10) and handle (9) lower end, manually rotatable handle (9) just can drive piston (3) and moves up and down, the moving up and down of piston (3); Force the slip depression bar to move up and down, reach the purpose of unlatching or throttle down; Current can not take place with the manually-operated gate of the present invention's enforcement yet and leak outside in the reason that same and embodiment 1 are the same.Therefore this device is equally applicable to manually-operated gate.

Claims

1. the anti-device that leaks outside comprises mangetic core assembly, seal ring A, seal ring B, flexible cover, packing, piston, slip depression bar; The upper and lower end face that it is characterized in that piston has cylindrical tank respectively, and circumferential groove is arranged at cylindrical top; Circle is round barrel shape in the rubber packing, and excircle part upper and lower end face diameter is up-small and down-big, and circle is sleeved in the circumferential groove of piston in the packing, and the cylindrical lower end surface of packing cooperates with the inwall slipper seal of drum cover.

2. according to the said a kind of anti-device that leaks outside of claim 1; It is characterized in that mangetic core assembly is sealed in the valve body chamber by fixed seal ring; The slip depression bar can move up and down in seal ring B; The circular groove of the lower end surface of piston is withstood in the upper end portion of slip depression bar, and the upper-end surface cylindrical tank of piston withstands the thermometer bulb depression bar of temperature control head.

3. according to the said a kind of anti-device that leaks outside of claim 1, it is characterized in that the underpart of drum cover is connected with cartridge cover through seal ring A, cartridge cover is connected with valve body through seal ring A.