CN2278082Y - Automatic spraying dust removing device of single signal self-locking hydraulic support frame - Google Patents

Abstract

The utility model provides an improved automatic spraying dust removing device for hydraulic supporting frames, which has a single signal self-locking function. The inner parts of two valve holes of a control valve which is a main part of the utility model are respectively provided with a spring and a cylindrical valve core whose one end is provided with a spring hole; the valve hole is divided into two hollow cavities by the valve core; an annular groove is arranged in the middle of the valve core; the annular groove is communicated with the spring hole through a cross hole; the valve hole is provided with an inlet hole is arranged at the end with the spring. Due to the action of water pressure and the springs, the control valve can have a self-locking function, and compared with the prior art, two sets of hydraulic pipelines can be omitted. As a result, the utility model has the advantages of low manufacturing cost and convenient installation and realizes the purpose that the front and the back parts of a hydraulic supporting frame can automatically spray mist to remove dust.

Description

Mono signal self-locking hydraulic pressure automation spray device for reducing dust

The utility model relates to the spray dust prevention device in coal mining work plane the hydraulic prop frame, particularly hydraulic prop frame system.

At the coal mining work plane, because two transportation back screen beams are windowed and are opened coming into operation in a large number of tail boom hydraulic prop frame, coal mining efficient, coefficient of mining and miner's safety factor are all increased substantially, but consequent coal dust directly affect the healthy of coal miner.

More advanced spray dust prevention technology has " the new type hydraulic bearer auto spraying device for reducing dust " that Shanxi Lu Kuang China hundred million rubber plants of industrial corporation produce at present, and the patent No. is: ZL 95 2 18427.3.Two pilot operated valve device that the different spool of the diameter that separates is formed in this device has two through holes and is contained in each through hole by one; the inlet opening communicates with two valve openings; the place, inlet opening adorns a water inlet pipe; the valve body bilateral symmetry adorn two the cover have nozzle outlet pipe and two the cover by two hydraulic control pipes, a reversible lock, two signal pipes and two fluid pressure lines that threeway is formed; its shortcoming is: moving around of spool all needs pressure liquid to promote; the valve body heaviness; the pipeline complexity; and need the reversible lock protection; the manufacturing cost height is installed inconvenient.

The purpose of this utility model just provides a kind of control valve and has that auto-lock function, pipeline are simple, low cost of manufacture, be convenient to install, can make the hydraulic prop frame realize before and after the device for reducing dust of auto spraying.

For reaching above-mentioned purpose, the utility model adopts the mono signal self-locking structure on existing technical foundation, respectively adorn the spool that one one end has spring eye in two valve openings of its critical piece control valve valve body, spool is divided into two sections cavitys with valve opening, have four road sealing rings on the spool circumference, the middle part has annular groove, has cross bore to communicate between annular groove and the spring eye, each spring is contained in the valve core spring hole, and the other end is stuck on the plug; Be provided with five spliced eyes in the valve body both sides, the inlet opening is located at the valve opening end that spring is housed, and five spliced eyes are equipped with water inlet pipe, two outlet pipes and fluid pressure line respectively.Fluid pressure line is two pressure liquid pipes, and an end of pressure liquid pipe is connected with the monosymmetric spliced eye of application valve body, and the other end is connected with the epicoele pipeline of the forward and backward post alive of hydraulic support.

Owing to take above-mentioned measure, when entering valve body and promote separately spool respectively by pressure liquid pipe from the pressure liquid of the forward and backward post epicoele alive of hydraulic prop frame respectively, the spring pressurized of spool opposite side, spool moves, the inlet opening is communicated with weep hole by spring eye, cross bore in the middle of the spool, make the shower nozzle water spray on the outlet pipe, reach the purpose of the dirt that goes out.Finish when putting coal, live post upwards, when its epicoele did not have pressure liquid, spool resetted under the water pressure pushing of spring and inlet opening, and inlet opening and weep hole are disconnected, and shower nozzle stops water spray.Owing to having auto-lock function after the control valve improvement, lack the fluid pressure line that includes reversible lock that two covers are connected with the post cavity of resorption of living than existing technology like this, it is simple to reach pipeline, low cost of manufacture, and make the hydraulic prop frame realize the effect of front and back auto spraying depositing dust.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 is the structure diagram of the utility model mono signal self-locking hydraulic pressure automation spray device for reducing dust;

Fig. 2 is the longitudinal plan of control valve among Fig. 1.

In Fig. 1 and Fig. 2, two high-precision through holes are arranged on the application valve body 1, identical cylindrical spool 17,18 all is housed respectively, four roads " O " RunddichtringO and polyvinyl fluoride back-up ring are arranged on each spool, there is an annular groove 23,26 centre, one spring eye is arranged on each spool and spring 11,13 respectively is housed, each is communicated annular groove on each spool with spring eye by cross bore 22,25, at the two ends of valve body two through hole four screw plugs 12 that have " O " RunddichtringO are arranged, spool, spring, valve body and screw plug are all through antirust nitrogen treatment.Water inlet pipe 2, outlet pipe 3,10 are housed respectively on five spliced eyes 14,15,20,16,19 of 1 two sides of control valve, pressure liquid pipe 6,7, pressure liquid pipe 6,7 other ends respectively with the hydraulic prop frame on the epicoele pipeline of forward and backward post alive be connected by threeway 5,8, outlet pipe 3,10 connects spray boom 4 and shower nozzle 9 respectively, and water inlet pipe 2 is connected with the feed pipe of coal-face.When in the pressure liquid pipe 6 pressure liquid being arranged, then promote spools 17 and move and make outlet pipe 3 and water inlet pipe 2, then spray boom 4 water sprays by spring eye 21, cross bore 22, annular groove 23 conductings by spliced eye 16; When in the pressure liquid pipe 6 during no pressure liquid, then spring 13 and hydraulic pressure reset spool 17, and outlet pipe 3 and water inlet pipe 2 disconnect (mono signal self-locking), and spray boom 4 stops water spray.When in the pressure liquid pipe 7 pressure liquid being arranged, then move and make outlet pipe 10 and water inlet pipe 2, then shower nozzle 9 water sprays by intake tunnel 27, spring eye 24, cross bore 25, annular groove 26 conductings by another spool 18; When in the pressure liquid pipe 7 during no pressure liquid, then spring 11 and hydraulic pressure reset spool 18, and outlet pipe 10 and water inlet pipe 2 disconnect, and shower nozzle 9 stops water spray.Above-mentioned each pipe all is the high-pressure hose of the band ready-packaged joint of special use on the hydraulic pressure of the colliery supporting frame.

Claims (1)

1, a kind of mono signal self-locking hydraulic pressure automation spray device for reducing dust, by having two identical valve openings, spool, the control valve of plug and spliced eye, a water inlet pipe that is connected and communicates with control valve with two valve openings, two outlet pipes that have nozzle that are connected with control valve valve body bilateral symmetry, the other end that is connected with the valve body bilateral symmetry is formed with the fluid pressure line that hydraulic support column jecket alive road is connected, it is characterized in that, respectively adorning one one end in two valve openings of control valve has the cylindrical spool of spring eye and an end and is contained in the other end in the valve core spring hole and is stuck in spring on the plug, have four road sealing rings on the spool, the middle part has annular groove, there is cross bore to communicate between annular groove and the spring eye, the application valve body both sides are provided with five spliced eyes, wherein the inlet opening is located at the valve opening end that spring is housed, respectively adorn a pressure liquid pipe on the spliced eye of the other end two symmetries, the other end of pressure liquid pipe each with hydraulic support before, the epicoele pipeline of back post alive connects.

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