CN201068804Y - Electric fluid controlled thin coal layer covering type hydraulic support - Google Patents
Electric fluid controlled thin coal layer covering type hydraulic support Download PDFInfo
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- CN201068804Y CN201068804Y CNU2007200246740U CN200720024674U CN201068804Y CN 201068804 Y CN201068804 Y CN 201068804Y CN U2007200246740 U CNU2007200246740 U CN U2007200246740U CN 200720024674 U CN200720024674 U CN 200720024674U CN 201068804 Y CN201068804 Y CN 201068804Y
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Abstract
The utility model relates to an electrohydraulic control hydraulic shield support used in a low coal seam used for increasing the automation degree and the mining work efficiency. The electrohydraulic control hydraulic shield support used in the low coal seam comprises a single-side stand. The single-side stand comprises a base seat, a hydraumatic upright post, a front connecting rod, a rear connecting rod, a top beam, a side guard plate, a shield beam, a process hydraulicjack, a balance jack, a lateral thruster jack, an inner spray system and an electrohydraulic control system. The electrohydraulic control system comprises a stand controller, an electrohydraulic group valve, a hydraumatic upright post pressure pickup, a process hydraulicjack travel sensor, a balance jack travel sensor and a lateral thruster jack travel sensor. The signal wires of the hydraumatic upright post pressure pickup and each jack sensor are respectively connected with a signal input end of the stand controller correspondingly, the hydraulic circuits of a hydraumatic upright post fluid cylinder and each jack fluid cylinder are connected with the inflow or outflow connector of the electrohydraulic group valve correspondingly, and the stand controller is communicated with the electrohydraulic group valve.
Description
Technical field
The utility model relates to the support apparatus that a kind of colliery down-hole coal excavation uses, and relates in particular to a kind of electric-hydraulic control low coal seam shield type hydraulic support.
Background technology
A kind of electric-hydraulic control low coal seam shield type hydraulic support is comprising base, hydraulic vertical prop, front rod, back link, back timber, side guard board, caving shield, passing hydraulic jack, balance jack, thruster jack, be installed in internal spraying system, electrohydraulic control system in the back timber inside wall; Hydraulic vertical prop, front rod, back link and passing hydraulic jack are installed on the base respectively, connect back timber and hinged with it on the piston rod of hydraulic vertical prop, hinged caving shield on front rod, the back link, hinged base under front rod, the back link, the rear portion and the caving shield of back timber are hinged, and the thruster jack is installed on the back timber, and the thruster jack piston rod is fixedlyed connected with side guard board, balance jack is installed on the caving shield, articulated roof beam on the balance jack piston rod; The ascending, descending of hydraulic support, a series of actions such as push away, move all by HYDRAULIC CONTROL SYSTEM, so some hydraulic control valves and control valve are installed on the support.Control valve is by workman's push-pull knob control, thus the work that moves frame by manually-operated, automaticity is low.
Summary of the invention
The purpose of this utility model provides a kind of electric-hydraulic control low coal seam shield type hydraulic support that improves automaticity, exploitation operating efficiency.
To achieve these goals, the technical scheme that the utility model is taked is: a kind of electric-hydraulic control low coal seam shield type hydraulic support, comprising single-side stand, single-side stand comprising: base, hydraulic vertical prop, front rod, back link, back timber, side guard board, caving shield, passing hydraulic jack, balance jack, thruster jack, be installed in internal spraying system, electrohydraulic control system in the back timber inside wall; Hydraulic vertical prop, front rod, back link and passing hydraulic jack are installed on the base respectively, connect back timber and hinged with it on the piston rod of hydraulic vertical prop, front rod and back link are gone up hinged caving shield respectively, following hinged base, the rear portion and the caving shield of back timber are hinged, and the thruster jack is installed on the back timber, and the thruster jack piston rod is fixedlyed connected with side guard board, balance jack is installed on the caving shield, articulated roof beam on the balance jack piston rod; Its characteristics are: electrohydraulic control system is comprising bracket controller, electromagnetic valve group in current, hydraulic vertical prop pressure sensor, passing hydraulic jack stroke sensor, balance jack stroke sensor, thruster jack stroke sensor, the holding wire of hydraulic vertical prop sensor and each jack sensor respectively with corresponding connection of signal input part of bracket controller, the corresponding connection of liquid in-out connector of the fluid pressure line of hydraulic vertical prop hydraulic cylinder and each jack hydraulic cylinder and electromagnetic valve group in current; Bracket controller is electrically connected with electromagnetic valve group in current.
The utility model has the advantages that and no longer carry out a series of manual operations by frame when using the utility model under the coal mine, improved the automaticity of exploitation with artificial, output increases, reduce labor strength, increased safety, improved the exploitation operating efficiency.
Description of drawings
Fig. 1 is a kind of structural representation of the present utility model.
Fig. 2 is the structural representation of the base portion of Fig. 1.
Fig. 3 is the schematic diagram of another kind of structure of the present utility model.
Fig. 4 is electrohydraulic control system configuration and a connection layout in the utility model.
Fig. 5 is the wiring diagram of electromagnetic valve group in current in the utility model.
Fig. 6 is full face of the present utility model electrohydraulic control system configuration and connection layout.
Fig. 7 is the wiring diagram of double loop power supply case in the utility model.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is described further:
A kind of electric-hydraulic control low coal seam shield type hydraulic support, shown in Fig. 1,2,3,4,5,6,7, comprising single-side stand 2, single-side stand comprising base 8, hydraulic vertical prop 10, front rod 11, back link 7, back timber 1, side guard board 4, caving shield 6, pass hydraulic jack 9, balance jack 5, thruster jack 3, be installed in internal spraying system, electrohydraulic control system in back timber 1 inside wall; Hydraulic vertical prop 10, front rod 11, back link 7 and passing hydraulic jack 9 are installed in respectively on the base 8, connect back timber 1 and hinged with it on the piston rod of hydraulic vertical prop 10, front rod 11, back link 7 are gone up hinged caving shield 6 respectively, the following respectively hinged base 8 of front rod 11, back link 7, the rear portion of back timber 1 and caving shield 6 are hinged, thruster jack 3 is installed on the back timber 1, thruster jack 3 piston rods are fixedlyed connected with side guard board 4, balance jack 5 is installed on the caving shield 6, articulated roof beam 1 on balance jack 5 piston rods; Electrohydraulic control system is comprising bracket controller 12, electromagnetic valve group in current, hydraulic vertical prop pressure sensor, passing hydraulic jack stroke sensor, balance jack stroke sensor, thruster jack stroke sensor, the holding wire of hydraulic vertical prop sensor and each jack sensor respectively with corresponding connection of signal input part of bracket controller 12, the corresponding connection of liquid in-out connector of the fluid pressure line of hydraulic vertical prop hydraulic cylinder and each jack hydraulic cylinder and electromagnetic valve group in current; Bracket controller 12 is electrically connected with common method with electromagnetic valve group in current; Bracket controller 12, electromagnetic valve group in current are installed on the back timber, the hydraulic vertical prop pressure sensor is installed on the hydraulic vertical prop hydraulic cylinder, passing the hydraulic jack stroke sensor is installed on the passing hydraulic jack hydraulic cylinder, the balance jack stroke sensor is installed on the balance jack hydraulic cylinder, and thruster jack stroke sensor is installed on the thruster jack hydraulic cylinder; Bracket controller is by electromagnetic valve group in current, hydraulic vertical prop pressure sensor, and the control hydraulic vertical prop raises, retraction stroke, further controls the back timber height; Bracket controller is further controlled the pushing and sliding stroke by electromagnetic valve group in current, passing hydraulic jack stroke sensor; Bracket controller is further controlled the balance of back timber by electromagnetic valve group in current, balance jack stroke sensor; Bracket controller is by electromagnetic valve group in current, thruster jack stroke sensor, controls further that side guard board outwards extends, retraction stroke; In the present embodiment, 2 six of single-side stands are one group, and the bracket controller 12 on the adjacent single-side stand 2 links to each other by trunk cable; The adjacent single-side stand operation of the automatically controlled one action of separate unit bracket controller, this operation of electro-hydraulic reversing valve group hand push button; The separate unit support falls-moves-rise automatic sequence control; Become pack support to control automatically, comprising: become pack support fall automatically-move-liter, become the automatic pushing and sliding of pack support; In work plane local operation and " long-range " operation; Can realize this locking and work plane sudden-stop function at work plane; Adopt automated control technologies such as hydraulic support priming.
Below be the relevant explanation in the utility model:
1, configuration of pm31 electrohydraulic control system and connection
Fig. 6 and Fig. 4 have showed the configuration state and the connecting relation of pm31 electrohydraulic control system in the utility model that is applied to the user job face.From figure, can understand the overall picture of system: constitute their distribution and how to be connected into system by which equipment and device.
P is a column hydrostatic sensor CA cable assembly among Fig. 4, h is for passing hydraulic pressure thousand top line journey sensor electrical cable assemblies, i is an electromagnetic valve group in current electromagnetic coil CA cable assembly, 12 is bracket controller, 13-6 is a trunk cable assembly between frame, m is an electromagnetic valve group in current, and n is the column hydrostatic sensor, and O is for passing the hydraulic jack stroke sensor.Each controller group only need be adorned a bus lifter, is connected on usually on the isolating coupler, also can be connected on this and organize on arbitrary controller.
What Fig. 6 represented is the whole system trunk of full face, bracket controller of each single-side stand equipment, interconnected in order one-tenth net between the bracket controller, also be equipped with and connected some other indispensable part of appliance, form perfect system, part of appliance is comprising bracket controller 12, isolate coupling device 13-2, double loop power supply case 13-3, bus lifter 13-4, network terminal device 13-5, trunk cable assembly 13-6 between frame, power supply output cable assembly 13-7, coupling device-this frame trunk cable assembly 13-8, coupling device-adjacent frame trunk cable assembly 13-9, Fig. 4 is for being the configuration connection layout of single frame system of core with each bracket controller, establish crossheading main control computer as system, then the network port by termination frame controller connects to the main control computer system by trunk cable and associated components, expression be within a single-side stand, to be core with the bracket controller, it is exactly the complete electrohydraulic control system in a cover full face that the single frame system that comprises its input/output peripheral, each single frame system are combined among Fig. 6.Below do several explanations with regard to the relevant issues of system configuration and connection:
(1) cellular system in each single-side stand is a core with a bracket controller, also comprises hydraulic vertical prop pressure sensor, passing hydraulic jack stroke sensor and a cover electromagnetic valve group in current as bracket controller ancillary equipment.The hydraulic vertical prop pressure sensor is measured hydraulic vertical prop cavity of resorption hydraulic coupling.Pass the hydraulic jack stroke sensor and measure the stroke of passing hydraulic jack.Electromagnetic valve group in current is the execution unit of electrohydraulic control system, be divided into some unit by controlled device and holding function, each unit comprises the master control reversal valve that surges, a corresponding with it electromagnetic priority valve that is used for controlling the driving main reversing valve, and electromagnetic priority valve drives with two electromagnetic coils.A unit of electromagnetic valve group in current generally is used for controlling stretching of same hydraulic cylinder and contracts two and move (i.e. two functions), and the adhesive respectively of two electromagnetic coils has caused the action of these two correspondences.What of controlled device and control action (function) are the unit number of electromagnetic valve group in current depend on.Also have an electromagnetic coil drive in each single-side stand system, bracket controller is controlled each electromagnetic coil of excitation electromagnetic valve group in current by it.
(2) bracket controller of work plane is grouped because of power supply relation, and adjacent maximum 6～7 bracket controllers become a controller group by one tunnel DC power supply independently.The sign of grouping be group with group between all insert an isolating coupler, it has cut off that electric between group and group connects and by the photoelectricity communication data-signal that is coupled, this mode is for reaching the measure that the intrinsic safety the subject of knowledge and the object of knowledge is taked.Isolating coupler is introduced for power supply passage is provided in addition.
(3) all bracket controllers are made the line cable interconnect dry up and are become network.Trunk cable begins in proper order whole bracket controllers to be linked up (organizing separation through isolating coupler intermediary) from first bracket controller at two ends, the left and right sides.Each bracket controller all has address number, and address number is continuous in order.Trunk cable has 4 heart yearns, wherein 3 is the common wires that connect: No. 1 heart yearn is power supply 12V, No. 2 heart yearns are the communication bus that is called between all bracket controllers of TBUS, and No. 4 heart yearns are power supply 0V, and No. 3 heart yearns are the order wires that is called between the adjacent single-side stand of Bidi.
(4) network terminal device in the system, bus lifter are the necessary servicing unit of assurance system operate as normal.
(5) type of explosion proof construc tion of the automatically controlled part of pm31 system works face is except that power supply box is Flameproof intrinsically safe, and other are essential safe type entirely.
2, the equipment of pm31 electrohydraulic control system and device in the utility model
2.1 bracket controller (model pm32/sg)
Bracket controller is actually a miniature special use control computer, and hardware and software has concurrently.Application program in the software is that the control operation that aims at single-side stand is served.The deletion of application program and load and can carry out in easy mode at work plane, this provides convenience for the modification of application program and the adjustment of control function, thereby strengthens the compliance of system.
Bracket controller has complete human-computer interaction interface, is provided with 25 operated keys, locking rapid stop key button, and the LED dot matrix character display screen of 16 words, the LED luminous tube signal of various functions shows and buzzer.These facilities have guaranteed that the operator operates the prompting and the status information of control and timely acquisition system easily.Bracket controller has enough various types of input ports, delivery outlet and port, and their cable socket all is distributed in the bracket controller back, totally 12.The pattern of connector assembly is unified, is 4 cores, and No. 1 core is power supply 12V, and No. 4 cores are 0V or ground connection, and the purposes of No. 2, No. 3 cores is different with function.
Bracket controller operating voltage DC 12V, operating current 30mA.The IP68 degree of protection.
2.2 bracket controller installing rack
The bracket controller installing rack is used for installing and fixing and the protective cradle controller, pins the cable plug that connects with bracket controller simultaneously.The bracket controller installing rack is installed on the back timber of single-side stand with common method.
2.3 electromagnetic valve group in current
Electromagnetic valve group in current is a modular construction.Each unit comprises master control reversal valve and the corresponding electromagnetic priority valve that surges, and the electromagnetic priority valve suction that energising produces by electromagnetic coil moves, and there are two electromagnetic coils a unit, controls two actions respectively.The action of electromagnetic priority valve can also directly push the outer end of push rod except the suction by electromagnetic coil, and push rod drives the action of electromagnetic pilot spool.Push rod outer end envelope has the glue guard shield, for manually pushing.There are fault or other not to use under the situation of electric-control system at power failure, electric-control system temporarily,, can directly make the electromagnetic pilot valve events, but do not allow often operation like this, damage because easily cause by push rod as emergency operation.
Electromagnetic coil operating voltage DC12V, operating current 90mA.Fig. 5 represents the layout (electromagnetic valve group in current is Unit 4, wherein adorns electromagnetic priority valve and adopts 3 unit of electric control operation, and this figure draws by the configuration of 3 unit electromagnetic valve group in current) in electromagnetic valve group in current dead ahead.
The function and the configuration of electromagnetic valve group in current see Table 2.1.
The functional configuration of table 2.1 driver and electromagnetic valve group in current and corresponding relation
S1, S2, S3 are the electromagnetic coil socket among Fig. 5, and S1 connects bracket controller, and S2 connects bracket controller, and S3 connects bracket controller, are the pilot valve pusher button 1., 2., 3., 4., 5., 6..
2.4 electromagnetic coil drive (model mcv/8/d)
Electromagnetic coil drive is an expansion annex of bracket controller, and it is connected between bracket controller and the electromagnetic coil, is gone into power supply and control signal from bracket controller, carries out the task that each unit electromagnetic coil is infeeded power supply and controls on/off.The operating voltage of electromagnetic coil drive is DC12V.Electromagnetic coil drive has 1 input socket (D), and (V1～V8), maximum drivable electromagnetic priority valve numbers are 8 unit (16 coils) to maximum 8 outputs.
2.5 hydraulic vertical prop pressure sensor
The hydraulic vertical prop pressure sensor detects the hydraulic coupling in the hydraulic vertical prop cavity of resorption in the single-side stand, have pressure tap in the hydraulic vertical prop, the hydraulic vertical prop pressure sensor inserts the supporting state of real time monitoring single-side stand in the hydraulic vertical prop pressure tap, and the important parameter of control procedure is provided to system.Measurement category 0～the 60MPa of hydraulic vertical prop pressure sensor, sensing element are the resistance-strain bridge circuit, the low drift amplifier of band temperature-compensating in the hydraulic vertical prop pressure sensor, and (0.2～1.27mA) gives bracket controller to the output current analog signal.Hydraulic vertical prop pressure sensor operating voltage DV12V.
2.6 stroke sensor (comprises the stroke sensor body, model sns/rs/a; The stroke sensor magnet ring, model sns/rs/magn.kc; Connector socket, model conm/4/sm)
Stroke sensor is used for detecting the shift motion value of the piston rod of jack, the stroke value representative be the residing position of single-side stand or scraper-trough conveyer, be the important evidence of control procedure, pass the process that hydraulic jack piston rod position decision pushing and sliding move frame.Stroke sensor is contained in the hydraulic cylinder, it is the straight tube structure of elongated (Φ 17.2mm), one end is fixed on cylinder ends, body is deep into the piston rod center and aims in its slotted hole that gets out, along axial regular resistance row and the tongue tube row of arranging solid matter, they are connected into the circuit of network potentiometer in the body.Setting-in a little permanent-magnetic clamp that is enclosed within on the sensor tube in the piston, along with piston rod moves, its little magnetic field makes the tongue tube junction closure of the location, mobile the touching that is equivalent to potentiometer brushed away this position, the variation of potentiometer output valve has reflected the variation of stroke, the conversion of the amplifier of band in the process stroke sensor body again is to bracket controller output current analog signal (0.2～1mA).Connector socket is positioned at the end of jack outer wall.Stroke sensor can be surveyed range can be determined that the range ability that this support is passed the stroke sensor of hydraulic jack equipment is 0～700mm by the user according to the pushing and sliding unit advance of single-side stand, resolution is 3mm, operating voltage DC12V.
2.7 double loop power supply case (model ntz/d/2 * 1.5)
Power supply box is the electric power conversion apparatus of electrohydraulic control system special use, and it is gone into 90V～250V AC power from work plane, is transformed into direct current 12V, powers to the pm31 electrohydraulic control system.Two independently AC/DC glue envelope modules are housed in the power supply box, constitute independently two-way power supply.Every road nominal load current 1.5A at most can be to 6～7 adjacent supports controller power supplies.Every road power supply all has the quick overcurrent protection of cut-off type, and the power supply box input/output port is arranged and the back panel wiring terminal is seen Fig. 7 with the connecting relation that exchanges input.Among Fig. 7,127V or 220VAC input inlet wire Y enter power supply box E, and after exchanging turnover wiring terminal a, b, c, d, e, f in the case, 127V or 220V AC are by outlet X.Z road 12VDC output, C road 12VDC output.
2.8 isolating coupler (model pm3/pa/11)
Isolating coupler is connected between the two adjacent groups bracket controller of being powered by different electrical power, with the complete electrical isolation of two pack support controllers, introducing each group for power supply provides passage, inside to have four photoelectric coupled devices to provide passage for the two-way signaling transmission of two data telecommunication line TBUS and Bidi.Isolating coupler has 4 sockets, is divided into A, B both sides (2 mouths of every side), connects segregate two pack support controllers respectively, and outer socket connects bracket controller, and inner socket connects the 12V power supply, then can connect bus lifter (seeing Fig. 6 for details) as not connecing power supply.
Isolating coupler operating voltage DC12V.
2.9 isolating coupler mounting blocks (model pm31/pa/hlt/a)
Be used for fixing isolating coupler and pin its cable plug.
2.10 network terminal device (model pm3/ack)
This is the situation for the data communication bus TBUS of surveillance, keeps proper communication and the annex that is provided with, and the two ends of controller network respectively are provided with one.Software their end automatically is set to " synchronized transmission ", regularly sends synchronization pulse to communication bus; The other end is set to " replying ", after receiving the synchronization pulse that transmits by bus, sends the transponder pulse signal to bus immediately.The situation of sending according to two ends terminal organ signal and transmitting on bus and situation that bracket controller receives, the judgement by controller software reach monitor bus and guarantee the purpose of proper communication.The emergency stop function of system also is to work by them.On the socket that network terminal device insertion two ends bracket controller is vacated, connect an end of main control computer again, an end of main control computer then is inserted in the main control computer system.Network terminal device operating voltage: DC6～30V, operating current 3.5mA.
2.11TBUS bus lifter (model pm3/pa/tpu)
This is for guaranteeing that TBUS bus normal signal transmission promotes the set annex of bus voltage, and each bracket controller group is used one, is inserted on the inboard socket of this isolating coupler of organizing an end or this is organized on the socket of any one bracket controller.TBUS bus lifter operating voltage DC12V, operating current 5mA.
2.12 CA cable assembly and annex thereof
Be used for connecting between each apparatus of system the one section cable that has also installed plug at two ends and be called CA cable assembly.The employed various CA cable assemblies of system all have been illustrated among Fig. 6 and Fig. 4.
The details of the various CA cable assemblies that the support electrohydraulic control system is used are listed table 2.2 in.
The CA cable assembly tabulation that table 2.2 uses
| Label | The CA cable assembly purposes | Model | Feature | The |
| 6 | Main line between frame | conm/4c | Band high strength rubber hose sheath, two ends are the |
4 |
| 7 | Power supply box output connects isolating coupler | conm/4a | Two ends are the |
4 |
| 8 | Connect isolating coupler and place bracket controller | conm/4c | Band high strength rubber hose sheath, two ends are the |
4 |
| 9 | Connect isolating coupler and adjacent stent controller | conm/4c | Band high strength rubber hose sheath, two ends are |
4 |
| 10 | Connect hydraulic vertical prop pressure sensor and bracket controller | conm/4c | Band high strength rubber hose sheath, two ends are the |
4 |
| 11 | Connect and pass hydraulic jack stroke sensor and bracket controller | conm/4c | Band high strength rubber hose sheath, two ends are the |
4 |
| 12 | Connect bracket controller and electromagnetic valve group in current | conm/4ahz | One end is the copper round plug, and the other end is the plastics |
4 |
Cable plug must block with the U-shaped pin after inserting socket, and the U-shaped pin has long 42mm (conm/4ske) and two kinds of specifications of long 72mm (conm/4skd is exclusively used in controller).
The socket that does not connect after cable or cable are extracted must be sealed up with the waterproof plug, and the plug type of circular socket is conm/4bl.
Claims (2)
1. electric-hydraulic control low coal seam shield type hydraulic support, comprising single-side stand (2), single-side stand (2) comprising: base (8), hydraulic vertical prop (10), front rod (11), back link (7), back timber (1), side guard board (4), caving shield (6), pass hydraulic jack (9), balance jack (5), thruster jack (3), be installed in internal spraying system, electrohydraulic control system in back timber (1) inside wall; Hydraulic vertical prop (10), front rod (11), back link (7) and passing hydraulic jack (9) are installed in respectively on the base (8), connect back timber (1) and hinged with it on the piston rod of hydraulic vertical prop (10), front rod (11) and back link (7) are gone up hinged caving shield (6) respectively, the following respectively hinged base (8) of front rod (11) and back link (7), the rear portion of back timber (1) and caving shield (6) are hinged, thruster jack (3) is installed on the back timber (1), thruster jack (3) piston rod is fixedlyed connected with side guard board (4), balance jack (5) is installed on the caving shield (6), articulated roof beam (1) on balance jack (5) piston rod; It is characterized in that: electrohydraulic control system is comprising bracket controller (12), electromagnetic valve group in current, hydraulic vertical prop pressure sensor, passing hydraulic jack stroke sensor, balance jack stroke sensor, thruster jack stroke sensor, the holding wire of hydraulic vertical prop sensor and each jack sensor respectively with corresponding connection of signal input part of bracket controller, the corresponding connection of liquid in-out connector of the fluid pressure line of hydraulic vertical prop hydraulic cylinder and each jack hydraulic cylinder and electromagnetic valve group in current; Bracket controller is electrically connected with electromagnetic valve group in current.
2. electric-hydraulic control low coal seam shield type hydraulic support according to claim 1 is characterized in that: (2) six of described single-side stands are one group, and the described bracket controller (12) on the adjacent single-side stand (2) links to each other by trunk cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200246740U CN201068804Y (en) | 2007-06-30 | 2007-06-30 | Electric fluid controlled thin coal layer covering type hydraulic support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200246740U CN201068804Y (en) | 2007-06-30 | 2007-06-30 | Electric fluid controlled thin coal layer covering type hydraulic support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201068804Y true CN201068804Y (en) | 2008-06-04 |
Family
ID=39490184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200246740U Expired - Fee Related CN201068804Y (en) | 2007-06-30 | 2007-06-30 | Electric fluid controlled thin coal layer covering type hydraulic support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201068804Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536286A (en) * | 2010-12-09 | 2012-07-04 | 郑州四维机电设备制造有限公司 | Shield-type hydraulic support for thin coal seam |
| CN102943684A (en) * | 2012-12-04 | 2013-02-27 | 韩雪峰 | Line paving method of coal mining bracket |
-
2007
- 2007-06-30 CN CNU2007200246740U patent/CN201068804Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536286A (en) * | 2010-12-09 | 2012-07-04 | 郑州四维机电设备制造有限公司 | Shield-type hydraulic support for thin coal seam |
| CN102943684A (en) * | 2012-12-04 | 2013-02-27 | 韩雪峰 | Line paving method of coal mining bracket |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080604 Termination date: 20100630 |