Coal mining machine hydraulic auxiliary supporting device suitable for large-gradient down mining

Abstract

The utility model discloses a coal mining machine hydraulic auxiliary supporting device suitable for large-gradient down mining, which comprises a buckling part, and the vertical section of the buckling part is in a] shape with a backward opening; the rear surface of the buckling part is connected with an upper supporting seat and a lower supporting seat; the upper supporting seat is backwards connected with a cylinder body for supporting a hydraulic cylinder; the front part of the cylinder body is backwards and downwards connected with an inclined supporting column, and the inclined supporting column is backwards connected with a lower supporting seat; extension rods of the supporting hydraulic cylinders are forwards connected with the supporting top plate; the upper and lower supporting seats and the supporting hydraulic cylinder form a group of supporting devices; two or more supporting top plates are arranged side by side at intervals, each supporting top plate is connected with three sets of supporting devices, and the three sets of supporting devices are evenly arranged at intervals left and right. Through the supporting hydraulic cylinders, the state of the supporting top plates can be adjusted, the stress conditions of different supporting top plates and different parts of the same supporting top plate can be balanced, the stress of the guide sliding shoes is shared, the safety of down-dip mining operation is ensured, the abrasion of the guide sliding shoes of the coal mining machine is reduced, and the phenomenon that the coal mining machine turns over on one side is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining, in particular to a supporting technology for a coal mining machine for steep slope mining. Background Art

[0002] In recent years, with the rapid development of coal mining technology in my country's coal mining enterprises, the degree of automation and production efficiency of underground coal mining machinery have been greatly improved.

[0003] In actual production, the geological conditions of coal seams in my country are complex. When mining at a large slope, the coal mining machine will, under the action of gravity, use the supporting sliding shoe as a fulcrum to cause the coal mining machine to roll over to the coal wall side. The guide sliding shoe hook will contact the rack rail, limiting the coal mining machine's tendency to continue reversing.

[0004] Therefore, when mining at a large slope, the guide slide may cause severe wear on the hook and side of the guide slide due to its abnormal posture and concentrated force. In severe cases, the hook or side may break, causing the coal mining machine to fall off the track or derail, which greatly affects the working stability and production efficiency of the coal mining machine.

[0005] An important reason for the guide slide to produce abnormal posture and concentrated force is the uneven coal wall of the working face. When the guide slide encounters the concave and convex parts of the coal wall, it may produce abnormal posture; the distance between different guide slides and the coal wall may vary due to the uneven coal wall. The guide slide closer to the coal wall is subjected to force first and bears a greater force than other guide slides, resulting in force concentration.

[0006] The setting idea of ​​the utility model is to share the force of the guide shoe through the support top plate of the auxiliary support device, adjust the posture of the support top plate through the hydraulic device, and balance the force conditions between different support top plates, so as to avoid the support top plate in the utility model encountering similar posture problems and force problems as the guide shoe. Utility Model Content

[0007] The utility model aims to provide a hydraulic auxiliary support device for a coal mining machine suitable for steep slope mining, which can adjust the posture of a supporting top plate through a hydraulic device and balance the stress conditions between different supporting top plates.

[0008] To achieve the above purpose, the utility model is a hydraulic auxiliary support device for a coal mining machine suitable for steep slope mining, with the direction of the coal mining machine toward the coal wall as the forward direction, comprising a buckle part for clamping at the front end of the coal mining machine, and the vertical cross section of the buckle part is in the shape of an opening facing backward;

[0009] The rear surface of the buckle part is connected with an upper support seat and a lower support seat, and the upper support seat is connected to the cylinder body of the supporting hydraulic cylinder backward; the front part of the cylinder body is connected to an inclined support backward and downward, and the inclined support is connected to the lower support seat backward;

[0010] The extension rod of the support hydraulic cylinder is connected forwardly with a support top plate, and the support top plate is used to support the coal wall of the working face and bear part of the weight of the coal mining machine when mining downward;

[0011] The upper support seat, the lower support seat and the support hydraulic cylinder form a group of support devices; two or more support top plates are arranged side by side at intervals, each support top plate is connected to three groups of support devices, and the three groups of support devices are evenly spaced left and right.

[0012] The upper supporting seat and the lower supporting seat are both trumpet-shaped with a small front and a large rear.

[0013] The front end of the extension rod supporting the hydraulic cylinder is connected forwardly with an insertion block, and the insertion block is provided with a through hole which is transparent from top to bottom;

[0014] A socket matching the insertion block is provided on the rear surface of the support top plate, and an opening is provided on the socket corresponding to the through hole on the insertion block; the insertion block is inserted into the socket, and pins are inserted into the through hole of the insertion block and the opening on the corresponding socket, so as to connect the extension rod of the support hydraulic cylinder with the support top plate; a positioning bolt is passed through the part of the bottom end of the pin extending out of the socket, and the positioning bolt confines the pin at the socket and the insertion block; the top end of the pin is an arc surface with the highest point located in the middle.

[0015] The utility model has the following advantages:

[0016] In the utility model, each supporting top plate is connected to three groups of supporting devices. By adjusting the extension amount of the extension rod of the supporting hydraulic cylinder in each group of supporting devices, the posture of the supporting top plate can be adjusted to avoid abnormal posture of the supporting top plate. The supporting hydraulic cylinder can also make the supporting top plate more flat by strongly pressing the coal wall of the working surface; of course, the normal pressing pressure can be restored after the strong pressing. The present invention can adjust the extension amount of the extension rods of different supporting hydraulic cylinders, and adjust the size of the reaction force from the coal wall received by each supporting hydraulic cylinder by adjusting the extension amount of the extension rod, which can not only balance the force of each supporting top plate to a more uniform state, but also balance the force conditions of the left and right parts in a supporting top plate.

[0017] In short, the utility model can adjust the state of the supporting top plate through the supporting hydraulic cylinder, balance the stress conditions between different supporting top plates and different parts of the same supporting top plate, effectively share the stress of the guide sliding shoe of the coal mining machine, ensure the safety of the coal mining machine during downward mining, reduce the wear of the guide sliding shoe of the coal mining machine, and prevent the coal mining machine from tipping over.

[0018] The ]-shaped buckle part can be conveniently buckled on the front of the coal mining machine to withstand the pressure of the coal mining machine on the coal wall.

[0019] The upper support seat and the lower support seat are both trumpet-shaped with a small front and a large back, which reduces the pressure between the upper and lower support seats and the front surface of the buckle, improves the structural strength, can better withstand the tight pressure on the coal wall formed by the weight of the coal mining machine, and is not easy to be damaged.

[0020] The arrangement of the pins and positioning bolts can conveniently and firmly connect the extension rod of the supporting hydraulic cylinder with the supporting top plate. The top of the pin is an arc surface with the highest point in the middle, which facilitates the falling coal to be scattered along the arc surface and prevents the falling coal from piling up at the pin and the socket when the coal mining machine is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Figure 2 yes Figure 1 Right view of .

[0023] Figure 3 yes Figure 1 Top view of the .

[0024] Figure 4 yes Figure 1 AA section view.

[0025] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0026] Figure 6 It is a three-dimensional structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0027] like Figures 1 to 6 As shown, the utility model provides a hydraulic auxiliary support device for a coal mining machine suitable for steep downward mining. With the direction of the coal mining machine toward the coal wall as the forward direction, the utility model includes a buckling portion 1 for being clamped at the front end of the coal mining machine. The vertical cross-section of the buckling portion 1 is in the shape of an opening facing backward, that is, a groove shape with an opening at the rear end, and also a rectangle with missing edges at the rear end.

[0028] The rear surface of the buckle portion 1 is connected with an upper support seat 2 and a lower support seat 3, and the upper support seat 2 is connected to a cylinder body 4 supporting the hydraulic cylinder backward; the front part of the cylinder body 4 is connected to an inclined support post 5 backward and downward, and the inclined support post 5 is connected to the lower support seat 3 backward;

[0029] The extension rod 6 of the support hydraulic cylinder is connected forwardly with a support top plate 7, and the support top plate 7 is used to support the coal wall of the working face and bear part of the weight of the coal mining machine when mining downward;

[0030] The upper support seat 2, the lower support seat 3 and the support hydraulic cylinder form a group of support devices; two or more support top plates 7 are arranged side by side at intervals, each support top plate 7 is connected to three groups of support devices, and the three groups of support devices are evenly spaced left and right.

[0031] In the utility model, each supporting top plate 7 is connected to three groups of supporting devices. By adjusting the extension amount of the extension rod 6 of the supporting hydraulic cylinder in each group of supporting devices, the posture of the supporting top plate 7 can be adjusted to avoid abnormal posture of the supporting top plate 7. The supporting hydraulic cylinder can also make the supporting top plate 7 press against the coal wall of the working surface with great force to make the contact surface smoother; of course, the normal pressing pressure can be restored after the great force pressing. The present invention can adjust the extension amount of the extension rod 6 of different supporting hydraulic cylinders, and adjust the size of the reaction force from the coal wall received by each supporting hydraulic cylinder by adjusting the extension amount of the extension rod 6, so as to balance the force of each supporting top plate 7 to a more uniform state, and also balance the force conditions of the left and right parts in a supporting top plate 7.

[0032] In summary, the utility model can adjust the state of the supporting top plate 7 through the supporting hydraulic cylinder, balance the stress conditions between different supporting top plates 7 and different parts of the same supporting top plate 7, effectively share the stress of the guide sliding shoe of the coal mining machine, ensure the safety of the operation of the coal mining machine during the downward mining, reduce the wear of the guide sliding shoe of the coal mining machine, and prevent the coal mining machine from tipping over. The shaped buckle part 1 is conveniently buckled at the front of the coal mining machine to withstand the pressure of the coal mining machine on the coal wall.

[0033] The upper support seat 2 and the lower support seat 3 are both trumpet-shaped with a small front and a large back. The upper support seat 2 and the lower support seat 3 are both trumpet-shaped with a small front and a large back, which reduces the pressure between the upper and lower support seats 3 and the front surface of the buckle 1, improves the structural strength, can better withstand the tight pressure on the coal wall formed by the weight of the coal mining machine, and is not easy to be damaged.

[0034] The front end of the extension rod 6 supporting the hydraulic cylinder is connected forwardly to an insertion block 8, and the insertion block 8 is provided with a through hole which is transparent from top to bottom;

[0035] A socket 9 matching the insertion block 8 is provided on the rear surface of the support top plate 7, and an opening is provided on the socket 9 corresponding to the through hole on the insertion block 8; the insertion block 8 is inserted into the socket 9, and a pin 10 is inserted into the through hole of the insertion block 8 and the corresponding opening on the socket 9, so as to connect the extension rod 6 of the support hydraulic cylinder with the support top plate 7; a positioning bolt 11 is passed through the part of the bottom end of the pin 10 extending out of the socket 9, and the positioning bolt 11 limits the pin 10 at the socket 9 and the insertion block 8; the top end of the pin 10 is an arc surface with the highest point located in the middle.

[0036] The arrangement of the pin 10 and the positioning bolt 11 can conveniently and firmly connect the extension rod 6 of the supporting hydraulic cylinder with the supporting top plate 7. The top of the pin 10 is an arc surface with the highest point in the middle, which facilitates the falling coal to be scattered along the arc surface and prevents the falling coal from piling up at the pin 10 and the socket 9 when the coal mining machine is working.

[0037] During operation, the utility model is conveniently buckled at the front end of the coal mining machine through the ]-shaped buckle connection part 1. Due to the downward mining, the front end of the coal mining machine is tilted downward, and the support top plate 7 is pressed against the coal wall of the working surface. If a certain support top plate 7 is in a virtual top state and there is no top pressure between it and the coal wall, the extension rods 6 of each support hydraulic cylinder corresponding to the support top plate 7 can be controlled to extend, so that a top pressure is generated between the support top plate 7 and the coal wall. By controlling the extension amount of the extension rods 6 of each support hydraulic cylinder, the actual top pressure between the corresponding support top plate 7 and the coal wall can be controlled, and the top pressure between each support top plate 7 and the coal wall can be controlled to a relatively uniform degree as much as possible. If a certain support top plate 7 encounters an uneven part of the coal wall, the extension rods 6 of the support hydraulic cylinder corresponding to the support top plate 7 can be extended forward to the maximum stroke first, so that the support top plate 7 generates a very large top pressure on the coal wall. Under the action of the huge top pressure, the protruding parts of the coal wall are crushed or sunken, thereby making the coal wall smoother. At this time, the extension rod 6 of the corresponding supporting hydraulic cylinder is controlled to be retracted, and the retraction amount of the extension rod 6 of the supporting hydraulic cylinder corresponding to the supporting top plate 7 is controlled in combination with the stress conditions of other supporting top plates 7, so that the top pressure of each supporting top plate 7 on the coal wall is controlled in a relatively uniform state. Each supporting top plate 7 and the original guide shoe of the coal mining machine support the weight load formed by the tilt of the coal mining machine, reduce the wear of the guide shoe, and avoid the supporting top plate 7 in the utility model from having similar posture problems and stress problems as the original guide shoe.

[0038] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A hydraulic auxiliary support device for a coal mining machine suitable for steep slope mining, with the direction of the coal mining machine toward the coal wall as the forward direction, characterized by: It includes a buckle part for clamping at the front end of the coal mining machine, and the vertical section of the buckle part is in the shape of an opening facing backward; The rear surface of the buckle part is connected with an upper support seat and a lower support seat, and the upper support seat is connected to the cylinder body of the supporting hydraulic cylinder backward; the front part of the cylinder body is connected to an inclined support backward and downward, and the inclined support is connected to the lower support seat backward; The extension rod of the support hydraulic cylinder is connected forwardly with a support top plate, and the support top plate is used to support the coal wall of the working face and bear part of the weight of the coal mining machine when mining downward; The upper support seat, the lower support seat and the support hydraulic cylinder form a group of support devices; two or more support top plates are arranged side by side at intervals, each support top plate is connected to three groups of support devices, and the three groups of support devices are evenly spaced left and right.

2. The hydraulic auxiliary support device for coal mining machines suitable for steep slope mining according to claim 1 is characterized in that: The upper supporting seat and the lower supporting seat are both trumpet-shaped with a small front and a large rear.

3. The hydraulic auxiliary support device for coal mining machines suitable for steep slope mining according to claim 1 is characterized in that: The front end of the extension rod supporting the hydraulic cylinder is connected forwardly with an insertion block, and the insertion block is provided with a through hole which is transparent from top to bottom; A socket matching the insertion block is provided on the rear surface of the support top plate, and an opening is provided on the socket corresponding to the through hole on the insertion block; the insertion block is inserted into the socket, and pins are inserted into the through hole of the insertion block and the opening on the corresponding socket, so as to connect the extension rod of the support hydraulic cylinder with the support top plate; a positioning bolt is passed through the part of the bottom end of the pin extending out of the socket, and the positioning bolt confines the pin at the socket and the insertion block; the top end of the pin is an arc surface with the highest point located in the middle.

Images