CN204457834U - Self-tipping formula reversible lock - Google Patents
Self-tipping formula reversible lock Download PDFInfo
- Publication number
- CN204457834U CN204457834U CN201420851838.7U CN201420851838U CN204457834U CN 204457834 U CN204457834 U CN 204457834U CN 201420851838 U CN201420851838 U CN 201420851838U CN 204457834 U CN204457834 U CN 204457834U
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- CN
- China
- Prior art keywords
- valve
- screw
- rear end
- valve seat
- self
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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.)
- Expired - Fee Related
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- Safety Valves (AREA)
- Preventing Unauthorised Actuation Of Valves (AREA)
Abstract
The utility model discloses a kind of Self-tipping formula reversible lock, comprise valve body, valve body is provided with two spools, spool comprises valve pocket, valve seat is provided with in valve pocket, sealing pair is provided with between valve pocket and valve seat, valve rod is provided with in valve seat, the front end of valve seat endoporus is provided with screw, little spring is provided with between valve rod and described screw, the valve pad that the rear end of valve rod is provided with steel ball and is sealed and matched with it, the rear end of valve seat is provided with spring base, the rear end of valve pocket is provided with screw plug, big spring and guide peg is provided with between spring base and described screw plug, voltage regulation screw and jam nut is provided with in the endoporus at screw plug rear portion, the front end of voltage regulation screw is supported on the guide bar.The safety valve with offloading functions is dissolved in reversible lock, thus realizes a kind of valve two kinds of functions, the stability of this valve can be guaranteed.
Description
Technical field
The utility model relates to a kind of hydraulic system components of coal-mine hydraulic support, particularly relates to a kind of Self-tipping formula reversible lock.
Background technology
Hydraulic support plays indispensable role in current coal mine fully-mechanized mining system, has very important effect, and the performance of support directly determines the efficiency of comprehensive extraction system, and hydraulic system and valve are the most key in this process.Particularly superelevation or the various aspects of performance of ultralow support to valve are proposed huge challenge, the restriction in some place in view of space, have all made new requirement to the size of valve and performance.
In prior art, the reversible lock that hydraulic support generally adopts all needs to be equipped with safety valve, unloads when being necessary to hydraulic cylinder.Such configuration support not high on space requirement does not have king-sized impact, but is but fatal weakness for girdle.This manner of formulation improves cost on the one hand, can waste more emulsion on the other hand, can cause interference in addition due to the restriction in space.
Utility model content
The purpose of this utility model is to provide a kind of Self-tipping formula reversible lock with unloading safety valve function.
The purpose of this utility model is achieved through the following technical solutions:
Self-tipping formula reversible lock of the present utility model, comprise valve body, described valve body is provided with two spools, described spool comprises valve pocket, valve seat is provided with in described valve pocket, sealing pair is provided with between described valve pocket and valve seat, valve rod is provided with in described valve seat, the front end of described valve seat endoporus is provided with screw, little spring is provided with between described valve rod and described screw, the valve pad that the rear end of described valve rod is provided with steel ball and is sealed and matched with it, the rear end of described valve seat is provided with spring base, the rear end of described valve pocket is provided with screw plug, big spring is provided with between described spring base and described screw plug, voltage regulation screw and jam nut is provided with in the endoporus at described screw plug rear portion.
The technical scheme provided as can be seen from above-mentioned the utility model, the Self-tipping formula reversible lock that the utility model embodiment provides, because valve core inside adopts double spool structure, the safety valve with offloading functions is dissolved in reversible lock, thus realize a kind of valve two kinds of functions, the stability of this valve can be guaranteed.
Accompanying drawing explanation
The main TV structure schematic diagram of the overall assembling of the Self-tipping formula reversible lock that Fig. 1 a provides for the utility model embodiment;
The side-looking structural representation of the overall assembling of the Self-tipping formula reversible lock that Fig. 1 b provides for the utility model embodiment;
The plan structure schematic diagram of the overall assembling of the Self-tipping formula reversible lock that Fig. 1 c provides for the utility model embodiment;
Fig. 2 is the overall assembling drawing of spool in the utility model embodiment;
Fig. 3 is feed liquor view in the utility model embodiment;
Fig. 4 is Self-tipping view in the utility model embodiment.
In figure:
21, valve body, 22, spool, 23, spool; 1, valve pocket, 2, valve seat, 3, screw, 4, little spring, 5, valve rod, 6, steel ball, 7, valve pad, 8, spring base, 9, big spring, 10, guide peg, 11, screw plug, 12, voltage regulation screw, 13, jam nut; O, P, A, B, A1, B1, PB represent different liquid mouths respectively.
Detailed description of the invention
To be described in further detail the utility model embodiment below.
Self-tipping formula reversible lock of the present utility model, its preferably detailed description of the invention be:
Comprise valve body, described valve body is provided with two spools, described spool comprises valve pocket, valve seat is provided with in described valve pocket, sealing pair is provided with between described valve pocket and valve seat, valve rod is provided with in described valve seat, the front end of described valve seat endoporus is provided with screw, little spring is provided with between described valve rod and described screw, the valve pad that the rear end of described valve rod is provided with steel ball and is sealed and matched with it, the rear end of described valve seat is provided with spring base, the rear end of described valve pocket is provided with screw plug, big spring is provided with between described spring base and described screw plug, voltage regulation screw and jam nut is provided with in the endoporus at described screw plug rear portion.
Be provided with guide peg in described big spring, the rear end of described guide peg is provided with flange, and the rear end of described big spring is against on described flange, and the rear end of described flange is against on the step of the endoporus of described screw plug.
The front end of described voltage regulation screw is against on the rear end face of described flange.
Self-tipping formula reversible lock of the present utility model, is dissolved into the safety valve with offloading functions in reversible lock, thus realizes a kind of valve two kinds of functions.
Specific embodiment:
As shown in Fig. 1 a, b, c, this reversible lock comprises two Self-tipping formula spools 22 on the whole and a valve body 21 combines, and in Fig. 1 a, b, c, liquid mouth A1, B1 are directly communicated with liquid mouth A, B respectively by aperture.
As shown in Figure 2, spool 22 mainly comprised for one large and one little two " spools " (referring to the valve seat 2 in Fig. 2 and steel ball 6 respectively).In order to ensure that size " spool " can reset in time, be separately installed with big spring 9 and little spring 4.For the requirement of different digging condition, by regulating voltage regulation screw 12 just can regulate self-discharging pressure, meet user's needs.When rigging screw 3, need at the appropriate locking thread glue of the surface smear of screw, can prevent on the one hand spool work long hours after the loosening of screw, also can play the effect of sealing on the other hand.In view of underground work environmental limit, consider the advantage of plug-in spool simultaneously, now this spool design is become plug-in spool, facilitate down-hole to realize convenient replacing.
The operating principle of specific embodiment is as follows:
During normal work, for Fig. 3 right half part, and the arrow representing liquid flow path direction in composition graphs does feed liquor explanation.When highly pressurised liquid is divided into the horizontal direction shown in figure and vertical direction two-way after PB mouth enters valve.The high pressure of horizontal direction arrives spool 23, promotes valve seat compression big spring, its annular seal space is opened, then unloads, and the O mouth now in figure is connected with the liquid phase of returning of hydraulic system.The high pressure of vertical direction then arrives spool 22, promotes steel ball and compresses little spring to carry out feed flow, realize support action in the effect of pressure.Operating principle and the right half part of left-half are completely the same.
During Self-tipping, for Fig. 4 right half part, and the arrow representing liquid flow path direction in composition graphs does unloading explanation.Now the pressure of hypothesis reversible lock working chamber is P, and the compressive force of big spring is F, as P × π × (D2 × D2-D1 × D1)/4 > F, highly pressurised liquid will promote valve seat compression big spring, its annular seal space is opened, then unloads, avoid hydraulic cylinder to damage.
The beneficial effect that technical solutions of the utility model are brought:
Self-discharging function is incorporated wherein, and the size of self compares not change greatly, so both reduced space to again save cost with common reversible lock; Emulsion during Self-tipping, when not needing reclaim when increasing pipeline, effectively can simplify the layout of hydraulic system and pipeline.
In concrete enforcement, voltage regulation screw 12 can adopt and between guide peg 10 and screw plug 11, add one or more shim realize pressure and regulate.
In embodiment, reversible lock is plank frame, in case of need, also can change tubular structure into.
The utility model adopts double spool structure, feed flow and self-discharging fluid course is separated, can guarantee the stability of this valve.
The above; be only the utility model preferably detailed description of the invention; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (3)
1. a Self-tipping formula reversible lock, comprise valve body, described valve body is provided with two spools, it is characterized in that, described spool comprises valve pocket, valve seat is provided with in described valve pocket, sealing pair is provided with between described valve pocket and valve seat, valve rod is provided with in described valve seat, the front end of described valve seat endoporus is provided with screw, little spring is provided with between described valve rod and described screw, the valve pad that the rear end of described valve rod is provided with steel ball and is sealed and matched with it, the rear end of described valve seat is provided with spring base, the rear end of described valve pocket is provided with screw plug, big spring is provided with between described spring base and described screw plug, voltage regulation screw and jam nut is provided with in the endoporus at described screw plug rear portion.
2. Self-tipping formula reversible lock according to claim 1, it is characterized in that, be provided with guide peg in described big spring, the rear end of described guide peg is provided with flange, the rear end of described big spring is against on described flange, and the rear end of described flange is against on the step of the endoporus of described screw plug.
3. Self-tipping formula reversible lock according to claim 2, is characterized in that, the front end of described voltage regulation screw is against on the rear end face of described flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420851838.7U CN204457834U (en) | 2014-12-26 | 2014-12-26 | Self-tipping formula reversible lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420851838.7U CN204457834U (en) | 2014-12-26 | 2014-12-26 | Self-tipping formula reversible lock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204457834U true CN204457834U (en) | 2015-07-08 |
Family
ID=53664736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420851838.7U Expired - Fee Related CN204457834U (en) | 2014-12-26 | 2014-12-26 | Self-tipping formula reversible lock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204457834U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500122A (en) * | 2014-12-26 | 2015-04-08 | 中煤北京煤矿机械有限责任公司 | Automatic unloading reversible lock |
-
2014
- 2014-12-26 CN CN201420851838.7U patent/CN204457834U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500122A (en) * | 2014-12-26 | 2015-04-08 | 中煤北京煤矿机械有限责任公司 | Automatic unloading reversible lock |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20161226 |