CN206174983U - Hierarchical release hydraulic support - Google Patents
Hierarchical release hydraulic support Download PDFInfo
- Publication number
- CN206174983U CN206174983U CN201621266677.0U CN201621266677U CN206174983U CN 206174983 U CN206174983 U CN 206174983U CN 201621266677 U CN201621266677 U CN 201621266677U CN 206174983 U CN206174983 U CN 206174983U
- Authority
- CN
- China
- Prior art keywords
- pressure
- support
- relief device
- valve
- seat
- Prior art date
- 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.)
- Active
Links
Abstract
The utility model discloses a hierarchical release hydraulic support, hydraulic support includes support back timber, support base, support shielding roof beam, support tail boom, be located front -seat support stand and back row support stand between support back timber and the support base the front -seat pressure -relief device that sets up on the front -seat support stand and the back row pressure -relief device who sets up on the support stand of back row makes front -seat pressure -relief device with back row pressure -relief device mutual independence ground release to according to the hierarchical release of roof coming pressure, through front -seat pressure -relief device and/or back row pressure -relief device self grading off -load when the roof coming pressure, reduce the front portion and/or the rear portion height of support back timber, in order to prevent pressure. The utility model discloses in, the front end and/or the rear end of support back timber independently reduce the height when the roof coming pressure to according to the hierarchical release of roof pressure, thereby play the effect of the buffering that steps down, with slope and the pressure frame that prevents the support.
Description
Technical field
The utility model is related to a kind of classification release hydraulic support and hydraulic support control method.
Background technology
Hydraulic support is the capital equipment of fully-mechanized mining working, plays supporting Stope roof, provides the working space of safety, pushes away
The key effect of coal mining transporting equipment is moved, the normal work of hydraulic support is the premise of safety and high efficiency.
After coal extraction, the stress redistribution of face surrounding rock a, part acts on answering on country rock around stope originally
Power is transferred on hydraulic support, when acting on the pressure on support and being very big, if can not release in time, easily cause wearing for support
Bottom even kills, and causes the advance of the face to be stagnated, and has a strong impact on production.
It is many at present that pressure rack, performance requirement of this mode to hydraulic support are prevented by improving hydraulic support working resistance
Very high, cost is also higher, and can not thoroughly prevent pressure rack accident.
Chinese patent literature CN102330560A discloses a kind of mine hydraulic support column with anti-crushing device, its
The oil-feed liquid pipeline of cylinder body cavity of resorption is provided with lower safety valve, and unloading aperture group, the group connection of unloading aperture are provided with cylinder side wall
Upper safety valve, when beyond the working resistance of hydraulic vertical prop on safety valve unloading, the unloading pressure of lower safety valve is upper safety valve
Unload pressure pressure 1.3~1.5 times.
Above-mentioned anti-pressure rack measure needs to open up unloading aperture group on cylinder side wall, has an impact to housing structure.
Utility model content
The purpose of this utility model is to provide a kind of classification release hydraulic support, can be timely when roof weighting is larger
Release on one's own initiative, prevents pressure rack.
The purpose of this utility model also resides in a kind of hydraulic support control method of offer, when roof weighting is larger can and
When release on one's own initiative, prevent pressure rack.
Therefore, on the one hand the utility model provides a kind of hydraulic support control method, in working face extraction process
In pressure rack to hydraulic support caused by roof pressure be controlled, the hydraulic support includes set cap, bracket base, branch
Frame caving shield, support tail boom, the front-seat bracket upright post between set cap and bracket base and heel row bracket upright post, in institute
The front-seat pressure relief device of setting and the heel row for being set in row's bracket upright post in the rear in front-seat bracket upright post is stated to unload and press-fit
Put, make the front-seat pressure relief device and the heel row pressure relief device release independently of each other, and unload according to roof weighting classification
Pressure, set cap is reduced when roof weighting by front-seat pressure relief device and/or heel row pressure relief device automatic classification off-load
Front and/or rear highly, to prevent pressure rack.
Further, it is three-level release that above-mentioned front-seat pressure relief device is classified release according to roof pressure, wherein, reached in pressure
To one-level release is carried out during 0.80-0.85 times of working resistance, pressure reaches the 1.0-1.05 times of resistance that works after the one-level release
Power constantly carries out two grades of releases, and reaching 1.3-1.35 times of working resistance in two grades of release downstream pressure carries out three-level release.
Further, above-mentioned front-seat pressure relief device or heel row pressure relief device are included in of sequential concatenation on main release oil circuit
One sequence valve, the second sequence valve and the 3rd sequence valve, are additionally included in after first sequence valve and connect with the main release oil circuit
Logical the first pressure-relief valve, the second pressure-relief valve after second sequence valve with the main release oil communication, described
With the 3rd pressure-relief valve of the main release oil communication after three sequence valves, wherein, Opening pressure of first sequence valve etc.
In 0.80~0.85 times of working resistance of hydraulic vertical prop, the Opening pressure of second sequence valve is equal to the 1.0- of hydraulic vertical prop
1.05 times of working resistances, the Opening pressure of the 3rd sequence valve is equal to 1.3-1.35 times of working resistance of hydraulic vertical prop, described
The Opening pressure of the first pressure-relief valve, the second pressure-relief valve and the 3rd pressure-relief valve is 0.1-0.3 times of working resistance of hydraulic vertical prop.
Further, alarmed when second sequence valve is opened.
Further, above-mentioned front-seat pressure relief device is integrated liquid pressure valve.
According to another aspect of the present utility model, there is provided one kind classification release hydraulic support, including set cap, support
Base, support caving shield, support tail boom, the front-seat bracket upright post between set cap and bracket base and heel row branch are erected
Post, it is characterised in that be additionally included in the front-seat bracket upright post set front-seat pressure relief device and arrange support in the rear
The heel row pressure relief device set on column, wherein, the front-seat bracket upright post passes through front-seat pressure relief device and is connected with emulsion box,
The heel row bracket upright post is connected by heel row pressure relief device with the emulsion box, the front-seat pressure relief device and heel row release
Device release independently of each other, and the front-seat pressure relief device and heel row pressure relief device are classification pressure relief device.
Further, above-mentioned front-seat pressure relief device is three-level pressure relief device.
Further, above-mentioned three-level pressure relief device includes the first sequence valve, second with sequential series on main release oil circuit
Sequence valve and the 3rd sequence valve, are additionally included in after first sequence valve and are unloaded with the first of the main release oil communication
Pressure valve, the second pressure-relief valve after second sequence valve with the main release oil communication, after the 3rd sequence valve
With the 3rd pressure-relief valve of the main release oil communication, wherein, the Opening pressure of first sequence valve is equal to hydraulic vertical prop
0.80-0.85 times of working resistance, the Opening pressure of second sequence valve is equal to 1.0-1.05 times of working resistance of hydraulic vertical prop,
The Opening pressure of the 3rd sequence valve is equal to 1.3-1.35 times of working resistance of hydraulic vertical prop, first pressure-relief valve, second
The Opening pressure of pressure-relief valve and the 3rd pressure-relief valve is 0.1-0.3 times of working resistance of hydraulic vertical prop.
Further, above-mentioned three-level pressure relief device is integrated liquid pressure valve.
Further, above-mentioned classification release hydraulic support also includes warning device and the pressure electrically connected with the warning device
Power relay, wherein, the pressure switch and the main release oil communication, its Opening pressure are equal to the 1.0- of working resistance
1.05 again.
This classification release hydraulic support include bracket upright post, set cap, support caving shield, support tail boom, bracket base,
Advancing jack, front-seat bracket upright post, heel row bracket upright post are respectively equipped with classification in front-seat bracket upright post and heel row bracket upright post
The pressure relief device of release, the front end and/or rear end of set cap independently reduce height in roof weighting, and according to top board
Pressure classification release, so as to play a part of step-down buffering, to prevent inclination and the pressure rack of support.
In addition to objects, features and advantages described above, the utility model also has other purposes, feature and excellent
Point.Below with reference to figure, the utility model is described in further detail.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing being further understood to of the present utility model, this practicality
New schematic description and description is used to explain the utility model, does not constitute to improper restriction of the present utility model.
In the accompanying drawings：
Fig. 1 is the structural representation according to classification release hydraulic support of the present utility model；
Fig. 2 is the schematic diagram in stope use state according to classification release hydraulic support of the present utility model；
And
Fig. 3 is the principle schematic of the three-level pressure relief device according to classification release hydraulic support of the present utility model.
Description of reference numerals
1st, bracket upright post；2nd, pressure-relief valve；
3rd, prior-warning device；4th, set cap；
5th, support caving shield；6th, support tail boom；
7th, bracket base；8th, advancing jack；
9th, drag conveyor；10th, coal-winning machine；
11st, coal mining machine roller；12nd, roof；
13rd, seat earth；14th, rib；
15th, goaf；20th, front-seat pressure relief device；
21st, the first sequence valve；22nd, the second sequence valve；
23rd, the 3rd sequence valve；24th, the first pressure-relief valve；
25th, the second pressure-relief valve；26th, the 3rd pressure-relief valve.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the utility model in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Fig. 1 and Fig. 3 are shown according to some embodiments of the present utility model.
Hydraulic support control method of the present utility model, for during working face extraction to hydraulic support because of top board pressure
The pressure rack that power is caused is controlled, and the hydraulic support includes set cap, bracket base, support caving shield, support tail boom, is located at
Front-seat bracket upright post and heel row bracket upright post between set cap and bracket base, the setting in the front-seat bracket upright post
Front-seat pressure relief device and in the rear row bracket upright post on set heel row pressure relief device, make the front-seat pressure relief device and
The heel row pressure relief device release independently of each other, and release is classified according to roof weighting, when roof weighting by front row
Pressure relief device and/or heel row pressure relief device automatic classification off-load come reduce set cap front and/or rear highly, in case
Only pressure rack.
This classification release hydraulic support include bracket upright post, set cap, support caving shield, support tail boom, bracket base,
Advancing jack, front-seat bracket upright post, heel row bracket upright post are respectively equipped with classification in front-seat bracket upright post and heel row bracket upright post
The pressure relief device of release, the front end and/or rear end of set cap independently reduce height in roof weighting, and according to top board
Pressure classification release, so as to play a part of step-down buffering, to prevent inclination and the pressure rack of support.
In one embodiment, it is three-level release that above-mentioned front-seat pressure relief device is classified release according to roof pressure, wherein, in pressure
Power carries out one-level release when reaching 0.80-0.85 times of working resistance, and pressure reaches 1.0-1.05 times of work after the one-level release
Making resistance constantly carries out two grades of releases, and reaching 1.3-1.35 times of working resistance in two grades of release downstream pressure carries out three-level release.
In the present embodiment, classification is controlled according to the magnitude relationship between roof weighting and the working resistance of bracket upright post
Release, and one-level release occur not up to bracket upright post working resistance (i.e. 0.8-0.85 working resistances, now beyond
The normal support pressure limit of bracket upright post, is generally defined in below 0.7 times of working resistance) when, play buffering antihypertensive effect.
In one embodiment, as shown in figure 3, above-mentioned front-seat pressure relief device or heel row pressure relief device are included in main release oil circuit
First sequence valve of upper sequential concatenation, the second sequence valve and the 3rd sequence valve, are additionally included in after first sequence valve and institute
State the first pressure-relief valve of main release oil communication, with the main release oil communication after second sequence valve second unload
Pressure valve, after the 3rd sequence valve with the 3rd pressure-relief valve of the main release oil communication, wherein, first sequence valve
Opening pressure be equal to 0.80~0.85 times of working resistance of hydraulic vertical prop, the Opening pressure of second sequence valve is equal to hydraulic pressure
1.0-1.05 times of working resistance of column, the Opening pressure of the 3rd sequence valve works equal to 1.3-1.35 times of hydraulic vertical prop
Resistance, the Opening pressure of first pressure-relief valve, the second pressure-relief valve and the 3rd pressure-relief valve is 0.1~0.3 times of work of hydraulic vertical prop
Make resistance.
In the present embodiment, three-level relief arrangement automatic classification release, each pressure-relief valve operating pressure is small, and release action can
Lean on, the pressure-relief valve of roof pressure unlatching higher is more, and off-load amount is bigger, off-load reaction is quick, to a certain extent (such as not
During more than 3 times of working resistances) avoid pressure rack, press quick-fried problem.Compared with prior art, unloaded without extra the opening up on cylinder wall
Lotus aperture, compared with two-stage unloading, off-load is more reliable.In a hydraulic support, the Opening pressure of the first sequence valve is 35MPa,
The Opening pressure of the second sequence valve is 40MPa, and the 3rd sequence valve is 45MPa.
In one embodiment, above-mentioned three-level pressure relief device is integrated liquid pressure valve, only including an import P and an oil return
Mouth T, simplifies pipeline connection and installs.
In the variant embodiment of the embodiment shown in Fig. 3, using two-stage unloading, eliminate the second sequence valve and second and unload
Pressure valve, pressure unloading is constant.
In one embodiment, front-seat bracket upright post using 3 grades of pressure relief devices of release, using 2 grades unloaded by heel row bracket upright post
The pressure relief device of pressure.
As depicted in figs. 1 and 2, classification release hydraulic support of the present utility model, including set cap, bracket base, branch
Frame caving shield, support tail boom, front-seat bracket upright post and heel row bracket upright post between set cap and bracket base, it is special
Levy and be, be additionally included in the front-seat bracket upright post set front-seat pressure relief device and in the rear row bracket upright post on
The heel row pressure relief device of setting, wherein, the front-seat bracket upright post passes through front-seat pressure relief device and is connected with emulsion box, it is described after
Row's bracket upright post is connected by heel row pressure relief device with the emulsion box, the front-seat pressure relief device and heel row pressure relief device phase
Mutual independently release, and the front-seat pressure relief device and heel row pressure relief device are classification pressure relief device.
In one embodiment, above-mentioned classification release hydraulic support also includes warning device and is electrically connected with the warning device
Pressure switch, wherein, the pressure switch and the main release oil communication, its Opening pressure are equal to working resistance
1.0-1.05 again.In the present embodiment, the keying of warning device is controlled by oil circuit pressure, the warning device is, for example, sound/light
Alarm.
2 illustrate the control method of the utility model hydraulic support below in conjunction with the accompanying drawings：
After the coal cutting of coal mining machine roller 11 terminates, bracket upright post 1 is reclaimed, drawn with drag conveyor 9 and advancing jack 8
Support integral forward lead, the new exposed top board of immediate support；Subsequent lift boom column 1, supporting support back timber 4, and using passage
Jack 8 promotes drag conveyor 9 and coal-winning machine 10 to move forward, and completes Bracing Process of once mining.When roof weighting is larger, pressure
After 35MPa, threshold value can be opened actively power for first sequence valve and the first pressure-relief valve of 35MPa, reduce emulsion pressure, and
When release, withdraw bracket upright post, reduce support, prevent and treat hydraulic support pushed down, be simultaneously emitted by early warning, remind operating personnel to take reply to arrange
Apply, after pressure-relief valve is opened, the space enlargement amount for emulsifying sap cavity is smaller, and emulsion pressure drop is limited, support still has very big
Support force, working face can normally back production, after roof weighting is bigger, threshold value is second sequence valve of 40MPa corresponding the
Two pressure-relief valves or threshold value are the corresponding 3rd pressure-relief valve unlatching of the 3rd sequence valve of 45MPa, the further release of pillar, in time protection
Hydraulic support.
Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle
Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.
Claims (5)
1. a kind of classification release hydraulic support, including set cap, bracket base, support caving shield, support tail boom, positioned at support
Front-seat bracket upright post and heel row bracket upright post between back timber and bracket base, it is characterised in that be additionally included in the front-seat branch
The front-seat pressure relief device set on post and the heel row pressure relief device for being set in row's bracket upright post in the rear are erected, wherein, institute
State front-seat bracket upright post to be connected with emulsion box by front-seat pressure relief device, the heel row bracket upright post passes through heel row pressure relief device
Connected with the emulsion box, the front-seat pressure relief device and the release independently of each other of heel row pressure relief device, and the front row
Pressure relief device and heel row pressure relief device are classification pressure relief device.
2. it is according to claim 1 to be classified release hydraulic support, it is characterised in that the front-seat pressure relief device is unloaded for three-level
Pressure device.
3. it is according to claim 2 to be classified release hydraulic support, it is characterised in that the three-level pressure relief device includes and master
First sequence valve of sequential series, the second sequence valve and the 3rd sequence valve on release oil circuit, are additionally included in first order
Connect with the main release oil circuit after valve with the first pressure-relief valve of the main release oil communication, after second sequence valve
Logical the second pressure-relief valve, after the 3rd sequence valve with the 3rd pressure-relief valve of the main release oil communication, wherein, described
The Opening pressure of one sequence valve is equal to 0.80~0.85 times of working resistance of hydraulic vertical prop, the Opening pressure of second sequence valve
Equal to 1.0~1.05 times of working resistances of hydraulic vertical prop, the Opening pressure of the 3rd sequence valve be equal to hydraulic vertical prop 1.3~
1.35 times of working resistances, the Opening pressure of first pressure-relief valve, the second pressure-relief valve and the 3rd pressure-relief valve is the 0.1 of hydraulic vertical prop
~0.3 times of working resistance.
4. it is according to claim 3 to be classified release hydraulic support, it is characterised in that the three-level pressure relief device is monoblock type
Hydraulic valve.
5. it is according to claim 3 classification release hydraulic support, it is characterised in that also including warning device and with the report
The pressure switch of alarm device electrical connection, wherein, the pressure switch and the main release oil communication, its Opening pressure etc.
In 1.0~1.05 times of working resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621266677.0U CN206174983U (en) | 2016-11-24 | 2016-11-24 | Hierarchical release hydraulic support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621266677.0U CN206174983U (en) | 2016-11-24 | 2016-11-24 | Hierarchical release hydraulic support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206174983U true CN206174983U (en) | 2017-05-17 |
Family
ID=58685946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621266677.0U Active CN206174983U (en) | 2016-11-24 | 2016-11-24 | Hierarchical release hydraulic support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206174983U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437809A (en) * | 2016-11-24 | 2017-02-22 | 安徽理工大学 | Grading pressure relief hydraulic support and control method thereof |
| WO2018094655A1 (en) * | 2016-11-24 | 2018-05-31 | 安徽理工大学 | Hydraulic support with staged pressure relief and method for controlling same |
-
2016
- 2016-11-24 CN CN201621266677.0U patent/CN206174983U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437809A (en) * | 2016-11-24 | 2017-02-22 | 安徽理工大学 | Grading pressure relief hydraulic support and control method thereof |
| WO2018094655A1 (en) * | 2016-11-24 | 2018-05-31 | 安徽理工大学 | Hydraulic support with staged pressure relief and method for controlling same |
| CN106437809B (en) * | 2016-11-24 | 2018-08-03 | 安徽理工大学 | It is classified release hydraulic support and hydraulic support control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206174983U (en) | Hierarchical release hydraulic support | |
| CN203173775U (en) | Ultrathin large-scissor type lifter | |
| CN105134274B (en) | The two post hydraulic support for large-mining height caving coal with three-level top coal recycling device | |
| CN206174981U (en) | Hydraulic support | |
| CN206625858U (en) | A kind of automatic moving type forepoling hydraulic support with side guard plate | |
| WO2018094705A1 (en) | Hydraulic support frame, and hydraulic support control method | |
| CN106401634B (en) | A kind of front and rear column split release hydraulic support | |
| CN106437809A (en) | Grading pressure relief hydraulic support and control method thereof | |
| CN204175326U (en) | With hydraulically powered flexible and upset combined mechanism on a kind of support | |
| CN202596763U (en) | Fully-mechanized hydraulic support for steep coal face crossing fault | |
| CN205297613U (en) | Formula temporary support support is moved certainly in colliery headwork face in pit | |
| CN200999625Y (en) | Cover type hydraulic support | |
| CN206190306U (en) | Front and back post components of a whole that can function independently release hydraulic support | |
| CN106761874A (en) | A kind of automatic moving type forepoling hydraulic support with side guard plate | |
| CN204591103U (en) | Folding ladder for building | |
| CN201059199Y (en) | Hydraulic support suitable for comprehensive mechanized caving coal working face | |
| CN208029765U (en) | A kind of vehicular hydraulic pressure Nursery stock transplanting device | |
| CN208184756U (en) | The big working resistance double-telescopic upright post of hydraulic support | |
| CN103233762B (en) | Two-prop shielding type electro-hydraulic-control top-coal caving hydraulic support | |
| WO2018094656A1 (en) | Hydraulic support capable of separately performing pressure relief by means of front pillar and rear pillar, and hydraulic support control method | |
| CN202866848U (en) | Top coal caving support capable of preventing extensible beam from offsetting | |
| CN101943016A (en) | Novel shielding full-mechanized mining hydraulic bracket for extremely thin coal bed | |
| CN106437805A (en) | Top coal caving hydraulic bracket combined body for exploiting 4-10 m steeply-inclined coal seam | |
| WO2018094655A1 (en) | Hydraulic support with staged pressure relief and method for controlling same | |
| CN203050755U (en) | Automatic movement type advance support bracket group |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |