Self-moving unit forepoling

Abstract

The utility model relates to the technical field of unit forepoling, in particular to a self-moving unit forepoling, which comprises two groups of unit forepoling bodies, support bases are arranged on the surfaces of the bottom ends of the unit forepoling bodies, the support bases are box-type bases, one end of each support base is provided with a pushing jack, and the other end of each support base is provided with a lifting jack. The surfaces of the two ends of the pushing jack are each provided with a connector and a connecting lug plate, the inner sides of the ends of the connectors and the inner sides of the ends of the connecting lug plates are each provided with a pin shaft, and the support base, the pushing jack, the connectors, the connecting lug plates and the pin shafts are connected to form a vertical hinged structure and a horizontal hinged structure. Meanwhile, the self-moving unit forepoling not only has the self-moving reliability of a stepping forepoling, but also can reliably protect the stability of a top plate, the transportation efficiency is improved, the labor intensity of workers is reduced, and the field use condition is met.

Description

Technical Field

[0001] The utility model relates to the technical field of unit advance brackets, in particular to a self-moving unit advance bracket. Background Art

[0002] After searching the existing Chinese patent literature with the announcement number CN218844341U, a large-angle tunnel unit advance support is disclosed, including a column, a top beam is arranged on the top of the column, and an inclined top plate is arranged on the top of the top beam; a base is arranged at the lower part of the column, and an inclined pad is arranged at the bottom of the base; a side plate and a swing jack driving the side plate to rotate are rotatably arranged on one side of the base. The device is provided with a swing jack connected to the base on one side of the column, and an inclined top plate is arranged on the top of the column and an inclined pad is arranged on the base. The extension and contraction of the swing jack can be used to realize the large-angle unit advance support top beam swinging at a large angle of ±20°, so that the support top beam can actively adapt to the uneven tunnel roof conditions after connecting to the top, and the support top beam can automatically reset to maintain a normal posture after lowering the frame, and the advance support can be completed through a pneumatic monorail hoist cycle to avoid repeated support of the support to damage the integrity of the tunnel roof.

[0003] In the production process of coal mining working face in coal mines, two types of advance supports are usually used in the drift: alternating step-type advance supports and unit advance supports. In view of the conditions of high tunnel pressure and broken roof, alternating step-type advance supports are used for tunnel advance support. During the process of moving the advance supports, the supports are lifted and lowered to repeatedly support the roof, resulting in the fast sinking and easy breaking of the tunnel roof in the advance support section. The deformation of the two sides is large, and large-scale roof falls often occur during the advancement process, which can easily cause injuries. Therefore, unit advance supports are used for tunnel advance support. In the process of using unit advance supports, the main risks are the difficulty in transporting unit supports and the easy dumping of large items during transportation. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a self-moving unit advance bracket, aiming to solve the technical problems of difficulty in transporting unit brackets and the potential dangers of large items tipping over during transportation.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] The utility model discloses a self-moving unit advance bracket, comprising a unit advance bracket body, wherein the unit advance bracket body is arranged in two groups, and a bracket base is arranged on the bottom end surface; the bracket base is a box-type base arrangement, and a push jack is arranged on one end of the bracket base; a connecting head and a connecting ear plate are arranged on the surfaces of both ends of the pushing jack; pins are arranged on the inner sides of the ends of the connecting head and the connecting ear plate; the bracket base, the pushing jack, the connecting head, the connecting ear plate and the pin are connected to form a vertical hinge structure and a horizontal hinge structure.

[0007] As a further description of the above technical solution:

[0008] The unit advance bracket body and the bracket base are fixedly connected, and the whole is arranged as two groups of brackets of the same specification. Two connecting holes are arranged on the surfaces of both ends of the bracket base. The two connecting holes of the bracket base are respectively fixed by connecting ear plates assembled by pin shafts, and are arranged as a vertical hinged structure.

[0009] As a further description of the above technical solution:

[0010] The connecting ear plate is assembled and fixed with the connecting head through a pin shaft, and is set as a vertical hinged structure. The connecting head is assembled and fixed with the piston rod of the push jack through a pin shaft, and is set as a horizontal hinged structure.

[0011] As a further description of the above technical solution:

[0012] The push jack cylinder body is assembled and fixed with the connecting ear plate through a pin shaft, and is set as a vertical hinged structure. The connecting ear plate is assembled and fixed with the connecting hole of the bracket base through a pin shaft, and is set as a vertical hinged structure.

[0013] As a further description of the above technical solution:

[0014] The push jack, the connecting head and the connecting ear plate are all spliced ​​and assembled, the push jack is made of cylindrical stainless steel, the connecting head and the connecting ear plate are both castings, and the pin shaft is cylindrical and made of stainless steel.

[0015] The utility model has the following beneficial effects:

[0016] The utility model solves the difficult problems of large-scale dumping and lifting and traction by hand winches in traditional manual operation through design. At the same time, the self-moving unit advance bracket has the self-moving reliability of the walking type advance bracket and can reliably protect the stability of the top plate, thereby improving the transportation efficiency, reducing the labor intensity of employees, and meeting the on-site use conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic plan view of the overall structure of the utility model;

[0019] Figure 2 It is a schematic top view of the overall structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the A structure of the utility model;

[0021] In the figure: 1. Unit advance bracket body; 2. Bracket base; 3. Push jack; 4. Connector; 5. Connecting ear plate; 6. Pin shaft. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0023] In the drawings, the same reference numerals all refer to the same components.

[0024] Example 1

[0025] Reference Figure 1-3 The utility model provides an embodiment: a self-moving unit advance bracket, including a unit advance bracket body 1, the unit advance bracket body 1 is arranged in two groups, and a bracket base 2 is arranged on the bottom end surface, the bracket base 2 is a box-type base arrangement, a push jack 3 is arranged at one end of the bracket base 2, and a connecting head 4 and a connecting ear plate 5 are arranged on the surfaces of both ends of the pushing jack 3, and a pin shaft 6 is arranged on the inner side of the end of the connecting head 4 and the connecting ear plate 5, and the bracket base 2, the pushing jack 3, the connecting head 4 and the connecting ear plate 5 and the pin shaft 6 are connected to form a vertical hinge structure and a horizontal hinge structure.

[0026] The unit advance bracket body 1 and the bracket base 2 are fixedly connected, and the whole is arranged as two groups of brackets of the same specification. Two connecting holes are arranged on the surfaces of both ends of the bracket base 2. The two connecting holes of the bracket base 2 are respectively assembled with connecting ear plates 5 through pin shafts 6 and fixed, forming a vertical hinged structure.

[0027] The connecting ear plate 5 is assembled and fixed with the connecting head 4 through the pin shaft 6, which is a vertical hinged structure setting, and the connecting head 4 is assembled and fixed with the piston rod of the push jack 3 through the pin shaft 6, which is a horizontal hinged structure setting.

[0028] The cylinder body of the push jack 3 is assembled and fixed with the connecting ear plate 5 through the pin shaft 6, and is set as a vertical hinge structure. The connecting ear plate 5 is assembled and fixed with the connecting hole of the bracket base 2 through the pin shaft 6, and is set as a vertical hinge structure.

[0029] The push jack 3, the connecting head 4 and the connecting ear plate 5 are all assembled by splicing. The push jack 3 is made of cylindrical stainless steel, the connecting head 4 and the connecting ear plate 5 are both castings, and the pin shaft 6 is a cylindrical setting and is made of stainless steel.

[0030] Specifically, the device forms a self-moving unit advance support through the unit advance support body 1, the support base 2, the push jack 3, the connector 4, the connecting ear plate 5 and the pin 6. The unit advance support body is formed by the unit advance support body 1 and the support base 2, which can effectively support the top plate. The push jack 3 is used to apply a large amount of force to push the working surface to the target position. Based on the hydraulic transmission system, the system follows the Pascal principle. In the hydraulic system, the pressure of the liquid is consistent everywhere. Therefore, in a balanced system, the pressure applied to the smaller piston is smaller, while the pressure applied to the larger piston is larger, so that the liquid can be kept still. Through the transmission of the liquid, different pressures can be obtained at different ends, thereby achieving the purpose of force conversion. The emulsion of the working surface pump station provides a power source for the push jack 3 through the hydraulic valve group. When using the push jack 3, the jack control valve is operated to allow the high-pressure liquid to be introduced into the lower chamber (i.e., the piston chamber) of the jack through the hydraulic support control valve group, the hose and the joint seat, so that the piston rod is extended. When the jack needs to be retracted, the jack control valve is operated to introduce high-pressure liquid into the upper chamber of the jack (i.e., the piston rod chamber), so that the piston rod retracts under the action of the working liquid. The connector 4 is used for conversion between horizontal rotation and vertical rotation. The connecting ear plate 5 is used for connection between the bracket base 2 and the remaining components, which acts as a conversion head. The connector 4 and the connecting ear plate 5 are interchangeable. The pin shaft 6 is a horizontal pin shaft and a vertical pin shaft, so that the horizontal rotation of the assembly components and the vertical rotation of the assembly components are realized. The two sets of units advance the bracket body 1 and the bracket base 2 as a whole, so that the extension of the push jack 3 is The left-side unit advance support body 1 supports the top plate, and the right-side unit advance support body 1 is lowered to unload, which controls the self-movement operation of the right-side unit advance support body 1. At the same time, through the retraction of the pushing jack 3 and the right-side unit advance support body 1 supporting the top plate and the left-side unit advance support body 1 being lowered to unload, the self-movement operation of the left-side unit advance support body 1 is controlled, which effectively solves the transportation problem of the two groups of unit advance supports and realizes self-movement. The pin shaft 6 and the connecting ear plate 5, the connecting head 4 and the pushing jack 3 are vertically hinged design, which can realize vertical rotation and meet the requirements of the ups and downs of the tunnel bottom plate during the pushing operation. The pin shaft 6, the connecting head 4 and the pushing jack 3 are designed to be horizontally hinged, which can realize horizontal rotation and correct the linear arrangement deviation of the two groups of unit advance supports during the pushing process, so that the whole can adapt to the changes in the slope of the tunnel and improve the stability of the self-moving operation of the unit advance supports. It can correct the position deviation of the two groups of unit advance supports and has a certain flexibility. At the same time, it can adapt to the changes in the slope of the tunnel and improve the stability of the self-moving operation of the unit advance supports.

[0031] Working principle: When in use, the two sets of unit advance brackets are two adjacent unit advance brackets, providing self-moving support force to each other. The latch 6 is used to connect the two sets of bracket bases 2 and the connecting ear plate 5. The connecting ear plate 5 is used to connect the left unit advance bracket and the connector 4. The connector 4 is used to connect the connecting ear plate 5 and the push jack 3. The push jack 3 plays the role of self-movement of the two adjacent unit advance brackets, and the step is achieved by the extension and contraction of the push jack 3. The two sets of unit advance brackets convert hydraulic energy into kinetic energy, effectively support the top plate, and provide support force to the push jack 3. The push jack 3 converts hydraulic energy into mechanical energy, extends or retracts under pressure, realizes the movement of the two sets of unit advance supports, and self-moves and closes the entire unit advance support, effectively solving the problem of unit advance support transportation. The strength of various connecting ear plates 5, connecting heads 4, pin shafts 6 and other components meets the design requirements. Under the condition that the roof of the coal mine comprehensive mining working face is extremely easy to break, in the process of advance support, the self-moving unit advance support support method replaces the step-type advance support support method, reducing repeated support of the roof. The overall structure is reasonable and the design is ingenious. It is a hydraulic pushing device, which is designed to protect the completeness of the roof. At the same time, it reduces the time-consuming and labor-intensive problem of moving the unit advance bracket, improves the transportation efficiency and the safety factor of movement, and enables the overall self-moving unit advance bracket to support the roof mutually through two groups of unit advance brackets to generate supporting force. When the pushing jack 3 is extended or retracted, the stepping movement of the two groups of unit brackets is controlled, which effectively solves the problem of moving the unit advance bracket in a narrow space. It has the convenience of moving the stepping advance bracket and the flexibility of the single support, and can reliably protect the roof, and is very suitable for use in tunnels with broken roofs.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A self-moving unit advance support, comprising a unit advance support body (1), characterized in that: The unit advance bracket body (1) is arranged in two groups, and the bottom surface is provided with a bracket base (2), the bracket base (2) is a box-type base, one end of the bracket base (2) is provided with a push jack (3), and the two end surfaces of the push jack (3) are provided with a connecting head (4) and a connecting ear plate (5), and the inner side of the end of the connecting head (4) and the connecting ear plate (5) is provided with a pin shaft (6), and the bracket base (2), the push jack (3), the connecting head (4), the connecting ear plate (5) and the pin shaft (6) are connected to form a vertical hinge structure and a horizontal hinge structure.

2. A self-moving unit advance bracket according to claim 1, characterized in that: The unit advance bracket body (1) and the bracket base (2) are fixedly connected, and the whole is arranged as two groups of brackets of the same specification. Two connection holes are arranged on the surfaces of both ends of the bracket base (2). The two connection holes of the bracket base (2) are respectively assembled with connecting ear plates (5) through pin shafts (6) and fixed, forming a vertical hinged structure.

3. A self-moving unit advance bracket according to claim 1, characterized in that: The connecting ear plate (5) is assembled and fixed with the connecting head (4) through a pin shaft (6), and is set as a vertical hinged structure. The connecting head (4) is assembled and fixed with the piston rod of the push jack (3) through a pin shaft (6), and is set as a horizontal hinged structure.

4. The self-moving unit advance bracket according to claim 1 is characterized in that: The cylinder body of the push jack (3) is assembled and fixed with the connecting ear plate (5) through a pin shaft (6), and is set as a vertical hinged structure. The connecting ear plate (5) is assembled and fixed with the connecting hole of the bracket base (2) through a pin shaft (6), and is set as a vertical hinged structure.

5. The self-moving unit advance support according to claim 1 is characterized in that: The push jack (3), the connecting head (4) and the connecting ear plate (5) are all assembled by splicing. The push jack (3) is made of cylindrical stainless steel material, the connecting head (4) and the connecting ear plate (5) are all made of castings, and the pin shaft (6) is set as a cylinder and is made of stainless steel material.

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