CN201043471Y

CN201043471Y - Pilot-operated check valve for hydraulic support of suspension upper beam

Info

Publication number: CN201043471Y
Application number: CNU200720108859XU
Authority: CN
Inventors: 郑相辅
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-30
Filing date: 2007-04-30
Publication date: 2008-04-02
Anticipated expiration: 2017-04-30

Abstract

The utility model relates to a hydraulic control check valve for suspended top beam hydraulic support, wherein the valve body has an upper and lower end covers at both ends, the side wall is opened with a support liquid injection hole, a liquid discharge hole and an extraction cylinder liquid injection hole in turn, valve inner component includes an inner-placed check valve formed by a liquid injection valve body and a steel ball, the whole valve cavity is divided three cavities, upper, middle and lower, by the inner-placed check valve, a panel sealing surface and a valve core, the inner-placed check valve is located on the channel of the upper intracavity to the middle intracavity, and the panel sealing surface is located on the channel of the prop round cavity and the middle intracavity to the liquid discharge hole. Owe to the design of separation of the support liquid injection from the liquid return channel of the value, when the existing frame prop is combined with the value, the pressure liquid in the prop round cavity can avoid the operating valve and be directly re-exhausted to the pumping station oil tank without any blocks, and the utility model has advantages of rapid extraction cylinder speed and high frame moving efficiency, which is in particular applied in prop frame with long stroke and large diameter.

Description

Liquid control one-way valve for suspension moving root bar hydraulic chock

Technical field

The utility model belongs to a kind of support apparatus in coal mine valve member, especially relates to a kind of liquid control one-way valve for suspension moving root bar hydraulic chock.

Background technology

Hydraulic control one-way valve (being commonly called as the fluid-control one-way lock) is a kind of hydraulic prop for moving suspended top beam pillar top under the coal mine that is assemblied in, be used to control working solution turnover pillar circular cavity and annular chamber, make the pillar circulation finish support, carrying and unloading and carry the cylinder working stage, thereby realize cantilever support supporting coal-face top board, the control assembly of pushing ahead, every pillar is equipped with a hydraulic control one-way valve.The structure of existing hydraulic control one-way valve as shown in Figure 1, it mainly is made of valve body 2a and valve internal component, valve body 2a hollow forms an axially extending bore, and the axially extending bore two ends are respectively equipped with upper end cover 1a, bottom end cover 10a, and valve body 2a side has and supports liquid injection hole 6a, carries cylinder liquid injection hole 8a.Be provided with a lining 14a in the axially extending bore, the endoporus of lining 14a communicates with support liquid injection hole 6a inner port, the top of lining 14a is provided with valve seat 5a, valve seat 5a and spool 4a are because the effect of spring 19a forms a sealing surface 15a, sealing surface 15a top forms one and goes up inner chamber 18a, is provided with a radial direction through hole 16a who leads to the pillar circular cavity bottom the ring wall of last inner chamber 18a.Inner chamber 20a in forming between lining 14a below and the top stem casing 7a in the inner chamber 20a, offsets with spool 4a lower surface during one scalable push rod 12a front end stretches into, and the other end and top stem casing 7a inwall offset.Form lower inner cavity 9a between top stem casing 7a and the bottom end cover 10a.Carry cylinder liquid injection hole 8a and communicate with lower inner cavity 9a, the upper, middle and lower inner chamber is not connected, and the ring wall of lower inner cavity 9a is provided with a radial direction through hole 11a who leads to the pillar annular chamber.

During work,, enter the middle inner chamber 20a of valve through control valve, support liquid injection hole 6a by pipeline from the pressure liquid of pumping plant output, enter inner chamber 18a after backing down sealing surface 15a, then, deliver to the pillar circular cavity, the pillar oil cylinder is descended through the radial direction through hole 16a of last inner chamber 18a.After the cylinder that falls was finished, pillar held out against the coal-face roof and floor, closed control valve and realized that pillar just supports.When the shore supports coal-face need be carried cylinder after stage, the reverse operating control valve, pressure liquid enters from carrying cylinder liquid injection hole 8a, on the one hand, pressure liquid makes the pillar oil cylinder bear the power of rising in lower inner cavity 9a, lower inner cavity ring wall radial direction through hole 11a arrive the pillar annular chamber, on the other hand, pressure liquid promotes top stem casing 7a and push rod 12a rises, and backs down sealing surface 15a, makes the pressure liquid unloading in inner chamber 18a and the pillar circular cavity; Because the effect of annular chamber hydraulic pressure, oil cylinder rise the liquid sealing surface 15a that constantly inner chamber 18a, valve seat 5a and spool 4a form from valve make the pillar circular cavity, inner chamber 20a, support liquid injection hole 6a, get back to the pumping plant fuel tank with control valve by the road, thereby finish the cylinder task of putting forward.So the cylinder purpose is put forward in circulation realization support, carrying and unloading.

There are the following problems in actual use for existing hydraulic control one-way valve: handling poor: when carrying cylinder, the a large amount of pressure liquid that stores in the pillar circular cavity needs to return from former road, that is: to pass through last inner chamber 18a successively, the sealing surface 15a that is backed down by push rod 12a, middle inner chamber 20a, support liquid injection hole 6a, control valve and pipeline just can be got back to the pumping plant fuel tank, and control valve is because reasons in structure, back flow channel is very little, the discharge opeing resistance is very big, thereby there is back smooth problem of liquid, it is slow to cause putting forward cylinder speed, (quite difficulty of cylinder is felt to put forward in the scene to length consuming time, the stroke that promotes 800mm takes about 40-60 second, annular chamber needs continuous high pressure feed flow), it is low to move frame efficient, has seriously restricted the raising of coal-face coal mining progress.In addition; occur falling the cylinder phenomenon easily after carrying cylinder: because the reasons in structure of valve causes the anti-negative pressure ability of valve, the negative pressure that support oil cylinder gravity produces can make pillar fluid infusion again, and the pillar oil cylinder is descended; cause moving difficulty, the time regular meeting situation of cylinder appears carrying again.Moreover, easily produce misoperation: when other pillar of operation, jack, have the above pressure liquid of 0.8MPa in the discharging tube and easily enter the pillar of carrying cylinder, the pillar oil cylinder is descended by the one way valve in the hydraulic control one-way valve.

Summary of the invention

For overcoming above shortcomings in the prior art, the utility model aims to provide a kind of liquid control one-way valve for suspension moving root bar hydraulic chock with new structure, behind existing supporting this valve of hydraulic prop for moving suspended top beam, pressure liquid when carrying cylinder in the pillar circular cavity can return the pumping plant fuel tank fast unobstructedly, cantilever support is had carry cylinder speed fast, move the high advantage of frame efficient.

For achieving the above object, the utility model has adopted following technical scheme: this liquid control one-way valve for suspension moving root bar hydraulic chock, comprise valve body and valve internal component, valve body hollow forms an axially extending bore, the axially extending bore two ends are respectively equipped with upper end cover, bottom end cover, and valve internal component is between two end caps; Have on the body wall and support liquid injection hole, carry the cylinder liquid injection hole, on the valve body diapire, be provided with the radial direction through hole that leads to pillar circular cavity and annular chamber respectively; Valve internal component comprises back-moving spring, black box and spool, supports liquid injection hole and directly communicates with last inner chamber; Middle inner chamber communicates with the pillar circular cavity; Carry the cylinder liquid injection hole and directly communicate with lower inner cavity, pillar annular chamber, it is characterized in that: valve internal component also comprises the built-in one way valve that is made of fluid injection valve body, steel ball, gland nut, volute spring and stop collar; A boss anchor ring constitutes the flat seal face on fluid injection valve body bottom anchor ring and the body cavity; Black box in built-in one way valve, flat seal face and the spool peripheral groove is separated into inner chamber, middle inner chamber and lower inner cavity with the axially extending bore of valve, and built-in one way valve is arranged in inner chamber to bore passages; On the body wall, support liquid injection hole and carry and also be provided with an outage between the cylinder liquid injection hole, the flat seal face is located at pillar circular cavity and middle inner chamber to the passage of outage.

During concrete enforcement, the spool upper end connects with fluid injection valve body inner thread, and push up respectively with at the bottom of steel ball and the spool bore mutually at the volute spring two ends, makes steel ball and valve seat that certain pretightning force be arranged.

During concrete enforcement, back-moving spring is arranged on the bottom of upper end cover, and its two ends offset with the lower surface of fluid injection valve body and upper end cover respectively.

During concrete enforcement, be respectively equipped with two of symmetry on the sidewall of the valve body left and right sides and support liquid injection holes, two outages and two and carry the cylinder liquid injection hole.Need not series connection as two pillars, then can be designed to one-sided three holes to valve, or a side opening is got final product on stifled with plug when valve is installed.

Beneficial effect: the utility model is by changing an original column pressure liquid when carrying cylinder, the structure that need get back to the pumping plant fuel tank from pillar circular cavity, sealing surface, support liquid injection hole, the former road of control valve, after setting up the liquid back pipe road, make the pressure liquid in the pillar circular cavity can avoid the direct fuel tank that flows back to of control valve unblockedly, shorten back the liquid time, help carrying fast cylinder, make carry the cylinder time shorten to original about 1/3rd, thereby improved cantilever support move frame efficient.In addition, by substitute the big valve core of original structure with steel ball, increased the active force of spring relatively to steel ball, improved the anti-negative pressure ability (promptly improving the opening pressure of one way valve) of one way valve, measured result can (pumping plant pressure be 20-31MPa greater than 2.5MPa, can not influence fluid injection), thus the pillar cylinder phenomenon that falls stopped; Moreover after measured, therefore existing system returns hydraulic coupling all less than 1.5MPa because discharge opeing is unobstructed, and therefore, this pillar can not produce misoperation.At last,, make whole system be in the low pressure operation state, thereby help prolonging the support seal durability and improve reliability because system's when operation discharge opeing is smooth and easy; Because it is fast to put forward cylinder speed, this product is particularly suitable for big stroke and big cylinder diameter pillar brace.Therefore characteristics such as this valve has rational in infrastructure, and good seal performance, supporting capacity are stable, safe and reliable, the life-span is long, have special wide practical value.

For further understanding the utility model, be described in further detail by embodiment below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of prior art products.

Fig. 2 is the sectional structure schematic diagram of an embodiment of the utility model.

The specific embodiment

Sequence number is represented respectively among Fig. 1: upper end cover 1a, valve body 2a, fairlead 3a, spool 4a, valve seat 5a supports liquid injection hole 6a, and top stem casing 7a carries cylinder liquid injection hole 8a, lower inner cavity 9a, bottom end cover 10a, annular chamber radial direction through hole 11a, push rod 12a, back-moving spring 13a, lining 14a, sealing surface 15a, circular cavity radial direction through hole 16a, pressure meter hole 17a, last inner chamber 18a, spring 19a, middle inner chamber 20a connects screw 21a.

Sequence number is represented respectively among Fig. 2: upper end cover 1, valve body 2, fluid injection valve body 3, valve seat 4, support liquid injection hole 5, gland nut 6, volute spring 7, outage 8, spool 9 is carried cylinder liquid injection hole 10, bottom end cover 11, annular chamber radial direction through hole 12, lower inner cavity 13, black box 14, circular cavity radial direction through hole 15, middle inner chamber 16, flat seal face 17, sealing mat 18, black box 19, stop collar 20, last inner chamber 21 connects screw 22, back-moving spring 23, steel ball 24.

Referring to Fig. 2: valve body 2 profiles are a cuboid, and its hollow forms an axially extending bore, and the through hole two ends are provided with upper end cover 1, bottom end cover 11 respectively.The two ends of putting at axially extending bore are revolved in upper end cover 1, bottom end cover 11 sealings.The lower surface of upper end cover 1 and back-moving spring 23 tops offset, and the bottom of back-moving spring 23 and fluid injection valve body 3 tops offset.

Fluid injection valve body 3 is hollow cylindrical, and the top has inlet opening, and fluid injection valve body 3 constitutes built-in one way valve with steel ball 24, gland nut 6, volute spring 7, stop collar 20.A boss anchor ring constitutes flat seal face 17 on the bottom anchor ring of fluid injection valve body 3 and valve body 2 inner chambers; Black box 14 in built-in one way valve, flat seal face 17 and spool 9 peripheral groove is separated into inner chamber 21, middle inner chamber 16 and lower inner cavity 13 with the axially extending bore of valve body 2, and built-in one way valve is arranged in inner chamber 21 to the passage of inner chamber 16; On valve body 2 sidewalls, support liquid injection hole 5 and carry and also be provided with an outage 8 between the cylinder liquid injection hole 10, flat seal face 17 is located at pillar circular cavity and middle inner chamber 16 to the passage of outage 8.The pressure liquid that the sealing surface of built-in one way valve is mainly used in control support liquid injection hole 5 passages enters, in fact steel ball 24 plays the spool effect, under the pushing tow of volute spring 7, only allows entering of abutment pressure liquid, and block back liquid, with the high pressure sealing of inner chamber 16 in guaranteeing and pillar circular cavity.

Be provided with black box 19 in the peripheral groove of fluid injection valve body 3, the order that sealing assembly 19 is set is to separate support fluid injection and back flow channel.

The boss anchor ring of fluid injection valve body 3 lower end anchor rings on sealing mat 18 and axially extending bore wall forms a flat seal face 17, this flat seal face 17 is mainly used in the high pressure sealing of pillar circular cavity, prop up the unloading of column pressure liquid when carrying cylinder and the apocenosis passage of the circular intracavity liquid of pillar when carrying cylinder, the pressurised fluid stream that sealing face after opening comes out is directly sent pumping plant fuel tank (prior art is to send fuel tank behind control valve again back to) back to by pipeline behind outage 8.

Corresponding with fluid injection valve body 3 lower ends, below the axially extending bore of valve body 2, be provided with spool 9.Two the different cylinders of diameter that are shaped as of spool 9 constitute, and top small diameter cylinders body hollow forms reservoir channel, and the passage lower port communicates with circular cavity radial direction through hole 15.The periphery, upper end of spool 9 is provided with external screw thread, the upper end of spool 9 and fluid injection valve body 3 lower port thread connection.

Be provided with black box 14 in the major diameter peripheral groove of spool 9, sealing assembly 14 is separated into two chambeies with the axially extending bore in the valve: middle inner chamber 16 and lower inner cavity 13.Wherein, middle inner chamber 16 communicates with the pillar circular cavity, and lower inner cavity 13 communicates with the pillar annular chamber.

Being symmetry shape on the sidewall of valve body 2 is respectively equipped with two and supports liquid injection holes 5, two outages 8 and two and carry cylinder liquid injection hole 10, same holes communicates, this mainly uses for the adjacent struts series connection considers, if on a pillar, then should blocking three holes of another side with the KJ-10 plug, independent use gets final product.

Tell the course of work of this valve below again, so that sharpen understanding.

1, when pillar need support (cylinder falls), open control valve (control valve external at this valve to the pipeline of pumping plant), pumping plant output pressure liquid pass through control valve, by the road from supporting the last inner chamber 21 that liquid injection hole 5 enters valve body 2, enter from fluid injection valve body 3 top inlet openings then, and back down arrive behind the sealing surface of the built-in one way valve that valve seat 4 and steel ball 24 form in inner chamber 16, then, inner chamber 16 leads to pillar circular cavity radial direction through hole 15 in the warp again, the pillar built-in pipe enters the pillar circular cavity, continuous increase along with pressure liquid, the oil cylinder cylinder that begins to fall contacts with base plate until oil cylinder bottom, reach pumping plant pressure until pillar circular cavity pressure, realize support just.

2, support.The control valve valve rod is placed meta (closing), stop feed flow, at this moment, volute spring 7 makes built-in closed check valve, add the sealing of the black box 14 on flat seal face 17 and the spool 9, inner chamber 16 and pillar circular cavity are kept high pressure in making, and realize that the pillar constant voltage supports.

3, in the time of need moving frame, pull control valve valve rod (to other direction) earlier, pumping plant output pressure liquid, pressure liquid is by carrying the lower inner cavity 16 that cylinder liquid injection hole 10 enters valve body 2, and at this moment, pressure liquid promotes to move on the spool 9 on the one hand, cause whole fluid injection valve body 3 valve members such as grade to rise, flat seal face 17 is backed down, and the flat seal face 17 of liquid through opening in middle inner chamber 16 and the pillar circular cavity is from outage 8 unloading and discharge opeings; On the other hand, pressure liquid enters the pillar annular chamber, and its pressure makes the discharge opeing of pillar oil cylinder and is promoted to desired location, finishes and moves the frame preparation.So circulation is finished support just, carrying and unloading and is proposed the cylinder operation.

During concrete enforcement, a side, 118 of valve body 2 * 28 two is designed the snap joint hole (traditional fluid-control one-way lock has only two, and is used for the shore supports fluid injection and proposes the cylinder discharge opeing, and another is used to propose the cylinder fluid injection) of three KJ-10 respectively.The snap joint hole of three KJ-10 of this valve, one is used for the shore supports fluid injection, and another is used to propose the cylinder fluid injection, and middle one is used for liquid discharge opeing in the pillar, without control valve, but directly gets back to fuel tank when liquid is discharged, and carries cylinder fast to realize pillar.

The utility model for embodiment only be the case of establishing for understanding; the distortion hydraulic control one-way valve of more any similar structures of making according to inventor's mentality of designing; have only the snap joint hole of one-sided three KJ-10 etc. as valve body, also should belong to the protection domain of this patent.

Claims

1. a liquid control one-way valve for suspension moving root bar hydraulic chock comprises valve body (2) and valve internal component, and valve body (2) hollow forms an axially extending bore, and the axially extending bore two ends are respectively equipped with upper end cover (1), bottom end cover (11), and valve internal component is between two end caps; Have on valve body (2) sidewall and support liquid injection hole (5), carry cylinder liquid injection hole (8), on valve body (2) diapire, be provided with the radial direction through hole that leads to pillar circular cavity and annular chamber respectively; Valve internal component comprises back-moving spring (23), black box (14,19) and spool (9), supports liquid injection hole (5) and directly communicates with last inner chamber (21); Middle inner chamber (16) communicates with the pillar circular cavity; Carry cylinder liquid injection hole (5) and directly communicate with lower inner cavity (13), pillar annular chamber, it is characterized in that: valve internal component also comprises the built-in one way valve that is made of fluid injection valve body (3), steel ball (24), gland nut (6), volute spring (7) and stop collar (20); A boss anchor ring constitutes flat seal face (17) on fluid injection valve body (3) bottom anchor ring and the body cavity; Black box (14) in built-in one way valve, flat seal face (17) and spool (9) peripheral groove, the axially extending bore of valve is separated into inner chamber (21), middle inner chamber (16) and lower inner cavity (13), and built-in one way valve is arranged in inner chamber (21) to inner chamber (16) passage; On valve body (2) sidewall, support liquid injection hole (5) and carry and also be provided with an outage (8) between the cylinder liquid injection hole (10), flat seal face (17) is located at pillar circular cavity and middle inner chamber to the passage of outage (8).

2. a kind of liquid control one-way valve for suspension moving root bar hydraulic chock as claimed in claim 1 is characterized in that: spool (9) upper end connects with fluid injection valve body (3) inner thread, and push up respectively with at the bottom of steel ball (24) and spool (9) hole mutually at volute spring (7) two ends.

3. a kind of liquid control one-way valve for suspension moving root bar hydraulic chock as claimed in claim 1 is characterized in that: back-moving spring (23) is arranged on the bottom of upper end cover (1), and its two ends offset with the lower surface of fluid injection valve body (3) and upper end cover (1) respectively.

4. a kind of liquid control one-way valve for suspension moving root bar hydraulic chock as claimed in claim 1 is characterized in that: be respectively equipped with two of symmetry on the sidewall of valve body (2) left and right sides and support liquid injection holes (5), two outages (8) and two and carry cylinder liquid injection hole (10).