CN201322120Y

CN201322120Y - high-pressure large-flow inflated safety valve

Info

Publication number: CN201322120Y
Application number: CNU2008201244643U
Authority: CN
Inventors: 生凯章; 夏赣民; 张小明; 秦娟娟; 杨文�
Original assignee: FENGHUO MACHINE WORKS OF CHINA AEROSPACE SCIENCE AND TECHNOLOGY Corp
Current assignee: FENGHUO MACHINE WORKS OF CHINA AEROSPACE SCIENCE AND TECHNOLOGY Corp
Priority date: 2008-12-11
Filing date: 2008-12-11
Publication date: 2009-10-07
Anticipated expiration: 2018-12-11

Abstract

The utility model discloses a high-pressure large-flow inflated safety valve, which comprises a valve body (1), a valve core (2), a filtering sleeve (3), a one-way valve (4), a plug (5) and a spring (10), wherein, two seal rings (11) are arranged on the valve core (2); an oil chamber (18) is formed among the inner part of the filtering sleeve (3), the one-way valve (14) and the plug (5); the oil chamber (18) and the plug (5) are separated through a rubber pad (17); a ring groove (19) is formed between the two seal rings (11) on the valve core (2); and the ring groove (19) is communicated with a high-pressure liquid inlet cavity. The utility model has the advantages of simple processing and good airtightness, and can ensures the safety of the equilibrium jack of an underground hydraulic bracket.

Description

High-pressure high-flow inflatable safety valve

Technical field

The utility model belongs to hydraulic prop apparatus field under the coal mine, particularly a kind of high-pressure high-flow inflatable safety valve that is used to guarantee the balance jack safety of hydraulic support.

Background technique

Safety valve is to keep the hydraulic system Security promptly to guarantee one of most important valve class of hydraulic support Security.Since year, safety valve has satisfied the requirement of China's coal-mine equipment basically surplus the comprehensive mechanical coal mining technology 30 of China's employing hydraulic support.

Adopt the safety valve structure of air spring mainly to form by valve body, spool, axle, end cap, seal ring etc.Its principle is: the emulsified liquid that surpasses rated pressure in the hydraulic support balance jack promotes piston and is moved to the left, and the emulsified liquid of ultrahigh pressure sprays release from the hole, and when being discharged to set pressure, spring or gas pressure are with piston reset.Present pressure spring safety valve, the shortcoming of its existence are that complex spring processing technology difficulty is big, and adopt the safety valve of air spring usually to have poor air-tightness at present, and inflation is short blanking time.

The model utility content

The purpose of this utility model is, overcomes the deficiencies in the prior art, and a kind of high-pressure high-flow inflatable safety valve simple, that tightness is good of processing is provided.

Technical solution of the present utility model is: high-pressure high-flow inflatable safety valve, and comprise valve body, spool, cross filter ruffle, one-way valve, plug and spring, two seal rings are arranged on the spool, between inside, one-way valve and the plug of crossing filter ruffle, have a grease chamber.

Separate by rubber ring between described grease chamber and the plug.

Between two seal rings on the described spool, open an annular groove, and link up with the high pressure admission chamber.

Institute's topping up body is a silicone oil in the described grease chamber.

Compared with prior art, the beneficial effects of the utility model are:

(1) owing to increases a grease chamber of filling with silicone oil at the air chamber left end, under equal flow pressure, safety valve pressure has been realized the compound of gas-filled type and spring, this combined type both can satisfy the big precompression under the high pressure, the closing pressure that has guaranteed safety valve satisfies usage requirement, can make the boundary dimension of safety valve small and exquisite again, save raw material.

(2) owing to adopted the air spring combined type, make and to adopt the common cylinder spring that more similar safety valve adopts complex spring that tangible improvement is arranged, and greatly reduces difficulty of processing on processing technology.

(3) owing to increase a grease chamber of filling with silicone oil, and separate, thereby reduce the gas permeation link with rubber pad at the air chamber left end.

(4) in the middle of two seal rings of spool, open an annular groove, and link up with the high pressure admission chamber, this annular groove place forms a circle high-pressure emulsion when making valve work, right-hand member at air chamber produces seal action to it, reduce the gas permeation link, make the inflation of this high-pressure high-flow inflatable safety valve increase blanking time, increase in the down-hole one action time.

Description of drawings

Fig. 1 is the schematic representation of the utility model high-pressure high-flow inflatable safety valve.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

As shown in Figure 1, high-pressure high-flow inflatable safety valve comprises valve body 1, spool 2, crosses two seal rings 11, screw 12, pressure plate 13, collar 14, valve seat 15, sealing seat 16 and air chamber 20 on filter ruffle 3, one-way valve 4, plug 5, adhesive seal 6, O type circle 7, left ring washer 8, right ring washer 9, spring 10, the spool.

Between inside, one-way valve 4 and the plug 5 of crossing filter ruffle 3, have a grease chamber 18, separate by rubber pad 17 between grease chamber 18 and the plug 5.Fill silicone oil in the grease chamber 18.

Between two seal rings 11 on the spool 2, open an annular groove 19, and link up with the high pressure admission chamber.

During safety valve work; the very heavy emulsified liquid that surpasses rated pressure in pre-of hydraulic support balance promotes spool 2 and is moved to the left; the emulsified liquid of ultrahigh pressure sprays release from the hole; when being discharged to set pressure; spring 10 and atmospheric pressure acting in conjunction reset spool 2; its function had both been protected the safety of balance jack, kept system held at high pressure conditions again.

Annular groove 19 is linked up with the high pressure admission chamber, make valve these annular groove 19 places of when work form a circle high-pressure emulsion, it is produced seal action, reduce the gas permeation link at the right-hand member of air chamber 20, make the inflation of this high-pressure high-flow inflatable safety valve increase blanking time, increase in the down-hole one action time.

The foregoing description is a kind of enumerating of the present utility model, and those skilled in the art can carry out various improvement and replacing not departing from according to different designing requirements and design parameter under the situation of the present utility model, fall into protection domain of the present utility model equally.

Claims

1, high-pressure high-flow inflatable safety valve, comprise valve body (1), spool (2), cross filter ruffle (3), one-way valve (4), plug (5) and spring (10), two seal rings (11) are arranged on the spool (2), it is characterized in that: between inside, one-way valve (4) and the plug (5) of crossing filter ruffle (3), have a grease chamber (18).

2, according to the high-pressure high-flow inflatable safety valve of claim 1, it is characterized in that: separate by rubber pad (17) between grease chamber (18) and the plug (5).

3, according to the high-pressure high-flow inflatable safety valve of claim 1, it is characterized in that: open an annular groove (19) between two seal rings (11) on the spool (2), annular groove (19) is linked up with the high pressure feed liquor.

4, according to the high-pressure high-flow inflatable safety valve of claim 1, it is characterized in that: described grease chamber (18) interior institute topping up body is a silicone oil.