Stand column for thin seam fully-mechanized mining support

Abstract

The stand column comprises an outer cylinder body, a middle cylinder body and a movable column body, a pipe seat is fixedly connected to the lower end of one side of the outer cylinder body, a hydraulic control valve seat is fixedly connected to the upper end of the other side of the outer cylinder body, a hydraulic control valve is fixedly connected to the hydraulic control valve seat, a pipe seat hole is formed in the pipe seat, and a valve seat communicating hole and a valve seat hole are formed in the hydraulic control valve seat. One end of the pipe seat hole is communicated with an inner cavity of the outer cylinder body, the other end of the pipe seat hole is communicated with one end of the valve seat hole through the liquid passing pipe, the other end of the valve seat hole is communicated with the hydraulic control valve, one end of the valve seat communicating hole is communicated with the inner cavity of the outer cylinder body, and the other end of the valve seat communicating hole is communicated with the hydraulic control valve. According to the utility model, the technical vacancy that the adaptability of a fully-mechanized mining hydraulic support to thin coal seam mining is poorer due to the fact that most upright posts used in the thin coal seam hydraulic support are small in telescopic ratio and large in inclination angle is filled, and the special requirements of market users are met.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic supports, in particular to a column for fully-mechanized mining supports in thin coal seams. Background Art

[0002] China is rich in coal resources, but the occurrence of coal seams is diverse. Usually, taking 1.3m and 0.8m as the boundaries, coal seams with a thickness below 1.3m are collectively called thin coal seams, and those below 0.8m belong to extremely thin coal seams. Their resources are widely distributed. More than 80% of the proven coal mining areas in China are thin or extremely thin coal seams, and their reserves account for a large proportion in some areas. Therefore, the mining industry's demand for supports in thin coal seams will be extremely urgent. However, due to special geological conditions, small working spaces, low mining efficiency, low industrial concentration, poor safety conditions, low economic benefits and other reasons, a large amount of coal resources in thin coal seams are in a state of being shelved. The key to high-yield and high-efficiency mining of thin coal seams is to improve the mechanization level of thin coal seams. Among them, the hydraulic support in thin coal seams is an important device for supporting the working face of thin coal seams.

[0003] Since the thickness of thin coal seams varies greatly, it is required that the expansion ratio of double-extension columns is in the range of 2-3. In the prior art, most of the columns used in thin coal seam hydraulic supports have a small expansion ratio, resulting in poor adaptability of the hydraulic supports to thin coal seams. To meet the requirement of a large expansion ratio, the inclination angle of the columns is particularly large. At present, not only welding components such as joint seats, liquid-conducting pipes, and shields are arranged outside the cylinder body of traditional double-extension columns, but also three interfaces are required for the upper and lower chambers of the columns to realize the lifting of the double-extension columns. This not only occupies the space of the fully-mechanized mining hydraulic support, but also brings a lot of troubles to the layout of the hydraulic system due to the large number of high-pressure rubber hoses. Content of the Utility Model

[0004] The utility model aims at the deficiencies of the prior art and provides a column for fully-mechanized mining supports in thin coal seams.

[0005] The utility model is realized by the following technical solutions. A column for fully-mechanized mining supports in thin coal seams is provided, which is installed on the hydraulic support in an inclined state and includes an outer cylinder body, a middle cylinder body and a piston rod body. A pipe seat is fixedly connected to the lower end of one side of the outer cylinder body, a hydraulic control valve seat is fixedly connected to the upper end of the other side of the outer cylinder body, and a hydraulic control valve is fixedly connected to the hydraulic control valve seat. A pipe seat hole is opened in the pipe seat, and a valve seat communication hole and a valve seat hole are opened in the hydraulic control valve seat. One end of the pipe seat hole communicates with the inner cavity of the outer cylinder body, the other end of the pipe seat hole communicates with one end of the valve seat hole through a liquid-conducting pipe, the other end of the valve seat hole communicates with the hydraulic control valve, one end of the valve seat communication hole communicates with the inner cavity of the outer cylinder body, and the other end of the valve seat communication hole communicates with the hydraulic control valve.

[0006] As an optimization, the socket hole includes a socket side hole and a socket vertical hole that are perpendicular to each other. One end of the socket side hole communicates with the inner cavity of the outer cylinder, the other end of the socket side hole is blocked, one end of the socket vertical hole communicates with the liquid delivery pipe, and the other end of the socket vertical hole communicates with the socket side hole.

[0007] As an optimization, the other end of the socket side hole is blocked by a welded plug.

[0008] As an optimization, the plug is welded in the counterbore of the socket.

[0009] As an optimization, the liquid delivery pipe is a hard metal pipe.

[0010] As an optimization, the valve seat hole includes a valve seat side hole and a valve seat vertical hole that are perpendicular to each other. Both the valve seat side hole and the valve seat vertical hole are counterbores and are connected at the bottom. The valve seat vertical hole communicates with the liquid delivery pipe, and the valve seat side hole communicates with the hydraulic control valve.

[0011] The beneficial effects of the present utility model are as follows: For a prop used in a fully-mechanized mining support for thin coal seams of the present utility model, due to the narrow mining space in thin coal seams, the hydraulic control valve is placed in the front, which is convenient for workers to operate and is also conducive to observation and maintenance. The present utility model fills the technical gap that most of the props used in thin coal seam hydraulic supports have a small expansion ratio and a large inclination angle, resulting in poor adaptability of the fully-mechanized hydraulic support to thin coal seam mining, and meets the special needs of market users. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the present utility model;

[0013] Figure 2 is a diagram of the present utility model in use state;

[0014] Figure 3 is a cross-sectional view of the socket of the present utility model;

[0015] Figure 4 is a cross-sectional view of the hydraulic control valve seat of the present utility model;

[0016] As shown in the figure:

[0017] 1. Bottom valve, 2. Outer cylinder, 3. Middle cylinder, 4. Plunger body, 5. Large guide sleeve, 6. Small guide sleeve, 7. Socket, 71. Socket side hole, 72. Socket vertical hole, 73. Plug, 8. Liquid delivery pipe, 9. Hydraulic control valve seat, 91. Valve seat communication hole, 92. Valve seat side hole, 93. Valve seat vertical hole, 10. Hydraulic control valve, 11. Cylinder bottom. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To clearly illustrate the technical features of this solution, the following describes this solution through specific embodiments.

[0019] Such as Figures 1 - 4As shown, a column for a fully-mechanized mining support in thin coal seams of the present utility model is installed on a hydraulic support in an inclined state. As Figure 2 shown, the lower end of the column is hinged to the base of the hydraulic support, and the upper end is hinged to the roof. The upper end of the column is inclined forward. Figure 2 The left side in is the front side, which is the opening direction of the hydraulic support. Figure 2 is the state diagram when the hydraulic support is lifted. When the hydraulic support descends, the included angle between the column and the ground decreases.

[0020] It includes an outer cylinder body 2, a middle cylinder body 3, and a piston rod body 4. A large guide sleeve 5 is fixedly connected to the inner hole at the front end of the outer cylinder body 2. A small guide sleeve 6 is fixedly connected to the inner hole at the front end of the middle cylinder body 3. A bottom valve 1 is installed at the bottom of the middle cylinder body 3. In this embodiment, the lower end of the outer cylinder body 2 is fixedly connected to a cylinder bottom 11. The above-mentioned outer cylinder body 2, middle cylinder body 3, piston rod body 4, large guide sleeve 5, small guide sleeve 6, bottom valve 1, and cylinder bottom 11 are all prior arts and will not be described in detail.

[0021] A pipe seat 7 is fixedly connected to the lower end on one side of the outer cylinder body 2. In this embodiment, the pipe seat 7 is welded to the side of the cylinder bottom 11 of the outer cylinder body 2. A hydraulic control valve seat 9 is fixedly connected to the upper end on the other side of the outer cylinder body 2. The hydraulic control valve seat 9 is welded to the outer cylinder body 2. A hydraulic control valve 10 is fixedly connected to the hydraulic control valve seat 9. The two oil ports on the hydraulic control valve 10 are respectively port A and port B.

[0022] As Figure 1 shown, a pipe seat hole is opened in the pipe seat 7, and a valve seat communication hole 91 and a valve seat hole are opened in the hydraulic control valve seat 9. One end of the pipe seat hole communicates with the inner cavity of the outer cylinder body 2, and the other end of the pipe seat hole communicates with one end of the valve seat hole through a liquid delivery pipe 8. The other end of the valve seat hole communicates with the hydraulic control valve 10. One end of the valve seat communication hole 91 communicates with the inner cavity of the outer cylinder body 2, and the other end of the valve seat communication hole 91 communicates with the hydraulic control valve 10.

[0023] The liquid delivery pipe 8 is a hard metal pipe. In this embodiment, a seamless pipe is used, and both ends are fixedly connected by welding.

[0024] As Figure 3 shown, the pipe seat hole includes a pipe seat side hole 71 and a pipe seat vertical hole 72 that are perpendicular to each other. The pipe seat side hole 71 is a through hole and is perpendicular to the axis of the column. One end of the pipe seat side hole 71 communicates with the inner cavity of the outer cylinder body 2, and the other end of the pipe seat side hole 71 is blocked. In this embodiment, the other end of the pipe seat side hole 71 is blocked by a plug 73 welded thereon. The plug 73 is welded in a counterbore of the pipe seat 7.

[0025] The pipe seat vertical hole 72 is parallel to the axis of the column. One end of the pipe seat vertical hole 72 communicates with the liquid delivery pipe 8, and the other end of the pipe seat vertical hole 72 communicates with the pipe seat side hole 71.

[0026] As Figure 4As shown, the valve seat communication hole 91 is perpendicular to the axis of the column. The valve seat hole includes a valve seat side hole 92 and a valve seat vertical hole 93 that are perpendicular to each other. Both the valve seat side hole 92 and the valve seat vertical hole 93 are counterbores and are connected at the bottom. The valve seat side hole 92 is perpendicular to the axis of the column, and the valve seat vertical hole 93 is parallel to the axis of the column. The valve seat vertical hole 93 is connected to the liquid delivery pipe 8, and the valve seat side hole 92 is connected to the hydraulic control valve 10.

[0027] The pipe seat 7 and the hydraulic control valve seat 9 are respectively located on both sides of the outer cylinder body 2. In the installed state, the hydraulic control valve seat 9 is located on the front side of the column, and the pipe seat 7 is located on the rear side of the column. Therefore, the hydraulic control valve is placed in front of the upper end of the column. Its advantages are to protect the hydraulic control valve, facilitate operation and maintenance. Since the mining space in thin coal seams is limited and gangue may fall, if the hydraulic control valve is placed at the rear and not protected and intervened in time, it is easily damaged. Changing it to the front can, first, protect the hydraulic control valve from being damaged, and second, facilitate maintenance and operation.

[0028] The pipe seat 7 is located on the rear side of the column because the pipe seat 7 is located at the lower end of the column. If it is placed in front, when the hydraulic support is in the retracted state, the angle between the column and the ground is very small, and the pipe seat 7 is likely to interfere with the ground, and it is also not conducive to maintenance.

[0029] The usage method of the present utility model:

[0030] When the column is lifted, the pipe seat 7 and the hydraulic control valve seat 9 are welded on the outer cylinder body. The main inlet liquid enters the hole A of the hydraulic control valve 10, passes through the liquid delivery pipe 8 into the pipe seat 7, and finally enters the lower cavity of the outer cylinder body 2 through the side of the cylinder bottom 11, completing the extension of the middle cylinder body 3. The liquid in the column continues to be pressurized, forcing the bottom valve 1 in the middle cylinder body 3 to open, and the liquid enters the lower cavity of the middle cylinder body 3, causing the piston rod 4 to extend, and finally completing the extension of the column.

[0031] When the column descends, the liquid enters the hole B of the hydraulic control valve 10, and the middle cylinder body descends through the inner cavity of the outer cylinder body 2, causing the bottom valve 1 in the middle cylinder body 3 to contact the step of the cylinder bottom 11, mechanically opening the bottom valve 1, so that the piston rod 4 begins to descend, and finally completing the descent of the column.

[0032] The liquid inlet and return of the column are both completed through the hydraulic control valve 10. The hydraulic control valve seat 9 and the pipe seat 7 are connected by a liquid delivery pipe 8 made of 20 seamless steel pipes, replacing the traditional high-pressure rubber hoses. The welding is firm, not easily worn, and the service life is extended.

[0033] Due to the narrow space of the hydraulic support in thin coal seams, the hydraulic control valve 10 is arranged on the front side of the upper end of the column, which not only solves the problem of large space occupation when arranged at the lower end of the column, but also facilitates maintenance and operation. At the same time, the number of high-pressure rubber hoses is saved, and the connection is changed to seamless steel pipes, increasing wear resistance and firmness.

[0034] Certainly, the above description is not limited to the above examples. The technical features not described in the present utility model can be realized by or adopted from the prior art, and will not be elaborated here. The above embodiments and drawings are only used to illustrate the technical solutions of the present utility model and are not a limitation to the present utility model. The present utility model has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that any changes, modifications, additions or substitutions made by those of ordinary skill in the art within the scope of the essence of the present utility model do not depart from the purpose of the present utility model and should also fall within the scope of protection of the claims of the present utility model.

Claims

1. A column for fully-mechanized mining support in thin coal seams, which is installed on a hydraulic support in an inclined state, comprising an outer cylinder body (2), a middle cylinder body (3) and a piston rod body (4), characterized in that: A pipe socket (7) is fixedly connected to the lower end of one side of the outer cylinder body (2), and a liquid control valve seat (9) is fixedly connected to the upper end of the other side of the outer cylinder body (2). A liquid control valve (10) is fixedly connected to the liquid control valve seat (9). A pipe socket hole is formed in the pipe socket (7), and a valve seat communication hole (91) and a valve seat hole are formed in the liquid control valve seat (9). One end of the pipe socket hole communicates with the inner cavity of the outer cylinder body (2), the other end of the pipe socket hole communicates with one end of the valve seat hole through a liquid conveying pipe (8), the other end of the valve seat hole communicates with the liquid control valve (10), one end of the valve seat communication hole (91) communicates with the inner cavity of the outer cylinder body (2), and the other end of the valve seat communication hole (91) communicates with the liquid control valve (10).

2. The hydraulic prop for fully-mechanized mining support in thin coal seams according to claim 1, characterized in that: The pipe socket hole includes a pipe socket side hole (71) and a pipe socket vertical hole (72) that are perpendicular to each other. One end of the pipe socket side hole (71) communicates with the inner cavity of the outer cylinder body (2), the other end of the pipe socket side hole (71) is blocked, one end of the pipe socket vertical hole (72) communicates with the liquid conveying pipe (8), and the other end of the pipe socket vertical hole (72) communicates with the pipe socket side hole (71).

3. The upright post for fully-mechanized mining support in thin coal seams according to claim 2, characterized in that: The other end of the pipe socket side hole (71) is blocked by a plug (73) welded thereon.

4. The upright post for fully-mechanized mining support in thin coal seams according to claim 3, characterized in that: The plug (73) is welded in a counterbore of the pipe socket (7).

5. The upright post for fully-mechanized mining support in thin coal seams according to claim 1, characterized in that: The liquid conveying pipe (8) is a hard metal pipe.

6. The upright post for fully-mechanized mining support in thin coal seams according to claim 1, characterized in that: The valve seat hole includes a valve seat side hole (92) and a valve seat vertical hole (93) that are perpendicular to each other. Both the valve seat side hole (92) and the valve seat vertical hole (93) are counterbores and are communicated at the bottom. The valve seat vertical hole (93) communicates with the liquid conveying pipe (8), and the valve seat side hole (92) communicates with the liquid control valve (10).

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