CN101216129A - Pull-wire type pneumatic safe limit valve - Google Patents
Pull-wire type pneumatic safe limit valve Download PDFInfo
- Publication number
- CN101216129A CN101216129A CNA2007101163063A CN200710116306A CN101216129A CN 101216129 A CN101216129 A CN 101216129A CN A2007101163063 A CNA2007101163063 A CN A2007101163063A CN 200710116306 A CN200710116306 A CN 200710116306A CN 101216129 A CN101216129 A CN 101216129A
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- China
- Prior art keywords
- valve
- backguy
- pull
- push rod
- type pneumatic
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention discloses a draw cable-type pneumatic-control safety limit valve. Taking a self-unloading truck for example, during the process of hoisting the truck box, the draw cable and the draw rod are tightened; when the truck box is lifted at a certain height, the draw cable of the limit valve is tightened maximally and passes around the pulley to compress the compression spring of the limit valve, thereby releasing the driving rod of the pneumatic valve; the passive valve spring compresses and closes the air inlet valve bracket and the rubber seal gasket of the valve core, and allows the compressed air of the equipment to be controlled to be communicated with the external atmosphere by the central hole of the driving rod, so that the equipment to be controlled automatically returns to the stop working position, serving the position-limiting purpose.
Description
Technical field
The present invention relates to a kind of pull-wire type pneumatic safe limit valve, belong to the spacing field of safety in the air control system for air, when controlled device reaches capacity the position, can cut off power source automatically, controlled device is quit work, play safe position-limiting action.
Background technique
The spacing technology of gas control is very long in world's development and application history, various in style, but all be pressure-controlled limited valve, though pressure-controlled limited valve structure is simple, what it utilized just in time is the difficult controlled position of control valve itself, so, cause casualties and property loss because of the malfunctioning frequent generation major accident of limited valve.
Summary of the invention
The objective of the invention is to develop provides a kind of pull-wire type pneumatic safe limit valve opposite with conventional construction, accomplishes malfunctioning in no instance spacing atmosphere-comtrolling apparatus, improves the Safety performance of controlled device.
The object of the present invention is achieved like this:
Pull-wire type pneumatic safe limit valve provided by the invention is an example according to dump truck; The backguy of pull-wire type pneumatic safe limit valve is connected with railway carriage, does the pulling force variable motion, limited valve is fixed on the vehicle frame, is immutable position; Pneumatic valve is under the effect of conventional pressure spring, and gas circuit is in opening state, controlled device in working order, backguy is at relaxed state.In the lifting process of railway carriage, backguy is strained gradually, when body lifting arrives certain altitude, move the limited valve backguy to limit position, backguy and pull bar are walked around pulley with the compression of limited valve pressure spring, and with initiatively push rod release of air valve, the passive valve spring compresses suction valve and closes, simultaneously the pressurized air of controlled device is connected by active push rod center hole and atmosphere, venting just, controlled device is not got back to the position that quits work automatically because of there being pressure, plays purpose position-limiting action of the present invention.
Described pull-wire type pneumatic safe limit valve is made up of more than ten parts, backguy, 2 promptly 1,, pulley frame, 3, pulley, 4, pulley spindle, 5, pull bar, 6, pull bar pressure spring, 7 spool push rods initiatively, 8, spool push rod spring initiatively, 9, upper valve body, 10 times valve bodies, 11, passive fixed spool, 12 spool seal rings initiatively, 13, passive spool seal ring, 14, spool rubber gasket, 15, passive spool holder, 16, passive valve core spring, 17, compressed air inlet port, 18 compressed air outlet ports, 19, pressurized air signal arrow.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is pull-wire type pneumatic safe limit valve plan view provided by the invention (a not belt spool), and Fig. 2 is that sectional view (belt spool is not with backguy) is looked on the left side of Fig. 1.Fig. 3 is the plan view of Fig. 1.
Fig. 4 is sectional view of the present invention and each component identification schematic representation, and backguy is at relaxed state, and spool is in opening state, controlled device in working order, backguy is at limit position.
Fig. 5 is a sectional view of the present invention, and controlled device and spool are at spacing state, and backguy is loose.
Embodiment
Shown in Fig. 1,2,3 assembly relations, pull-wire type pneumatic safe limit valve as shown in Figure 4 initiatively backguy 1 and pull bar 5 presses together and is inserted in pull bar pressure spring 6 again and packs in pulley frame 2 center holes, reinstall in the groove of pulley 3, pulley 3 is packed in the oblong aperture of pulley frame 2, the pulley spindle 4 of packing into from center hole again.Initiatively spool 7 is packed into initiatively in the valve core spring 8, refills spool seal ring 12 initiatively and packs into together in the center hole of passive spool 11, and it is assembly that passive spool was loaded onto two passive spool seal rings 13 in 11 minutes up and down.The passive core spring 16 of in the pit of following valve body 10, packing into, again spool rubber gasket 14 is embedded in the pit of passive spool holder 15, the active spool 7 that will install again, active valve core spring 8, active spool seal ring 12, divide the assembly adorn two passive spool seal rings 13 up and down to pack into down in the valve body on the passive spool 11, the valve body and will being compressed of again upper valve body being packed into down by rotary packing ring.Shown in figure one, will descend valve body to be connected with bolt with pulley frame, whole part assemblings of the present invention finish; The gas circuit of pull-wire type pneumatic safe limit valve is in opening state, controlled device in working order, backguy is loose.
As previously mentioned: pull-wire type pneumatic safe limit valve uses according to dump truck and is example, in the lifting process of railway carriage gradually with backguy 1, pull bar 5 tensions, when body lifting arrives certain altitude, move limited valve backguy 1 to limit position, backguy and pull bar 5 are walked around pulley with 6 compressions of limited valve pressure spring, with initiatively push rod 7 releases of air valve, passive valve spring 16 is with suction valve holder 15, spool rubber gasket 14 compresses closes, pressurized air such as Fig. 5 with controlled device connects by active push rod center hole and atmosphere simultaneously, venting just, make controlled device get back to the position that quits work automatically, play purpose position-limiting action of the present invention.
Claims (3)
1. a pull-wire type pneumatic safe limit valve uses according to dump truck and is example, in the lifting process of railway carriage, gradually backguy 1, pull bar 5 are strained, when body lifting arrives certain altitude, move limited valve backguy 1 to limit position, backguy and pull bar 5 are walked around pulley with 6 compressions of limited valve pressure spring, with initiatively push rod 7 releases of air valve, passive valve spring 16 compresses suction valve holder 15, spool rubber gasket 14 to close, and pressurized air such as the Fig. 5 with controlled device connects by active push rod center hole and atmosphere simultaneously.
2. according to claim 1ly move limited valve backguy 1 to limit position, backguy and pull bar 5 are walked around pulley with 6 compressions of limited valve pressure spring, with air valve initiatively push rod 7 discharge.
3. passive valve spring 16 according to claim 1 compresses suction valve holder 15, spool rubber gasket 14 to close, and pressurized air such as the Fig. 5 with controlled device connects by active push rod center hole and atmosphere simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101163063A CN101216129A (en) | 2007-12-29 | 2007-12-29 | Pull-wire type pneumatic safe limit valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101163063A CN101216129A (en) | 2007-12-29 | 2007-12-29 | Pull-wire type pneumatic safe limit valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101216129A true CN101216129A (en) | 2008-07-09 |
Family
ID=39622615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101163063A Pending CN101216129A (en) | 2007-12-29 | 2007-12-29 | Pull-wire type pneumatic safe limit valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101216129A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116066439A (en) * | 2022-12-27 | 2023-05-05 | 中国矿业大学 | Valve core push rod split type miniature high-speed digital valve |
-
2007
- 2007-12-29 CN CNA2007101163063A patent/CN101216129A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116066439A (en) * | 2022-12-27 | 2023-05-05 | 中国矿业大学 | Valve core push rod split type miniature high-speed digital valve |
| CN116066439B (en) * | 2022-12-27 | 2023-12-26 | 中国矿业大学 | Valve core push rod split type miniature high-speed digital valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080709 |