A mechanical device applied to the lowest limit of shield support

Abstract

The utility model provides a kind of mechanical device applied to the lowest limit of shield support, including limiting block and detachable baffle, the detachable baffle includes side plate and backing plate, the side plate and the backing plate are connected, the side plate is equipped in the limiting block side to realize the installation of the detachable baffle;The limiting block is used to limit the rotation of the front connecting rod between hydraulic support and hydraulic support base, and the backing plate is used to increase the limiting thickness of the limiting block to change the lowest limit height of the hydraulic support.By the mode of installing side plate on the side of limiting block, the backing plate is installed on the limiting block, and the process of adding detachable baffle is easy to operate, so that the hydraulic support has flexible and variable lowest limit height.

Description

Technical Field

[0001] This utility model relates to the field of coal mine support equipment, specifically, to a mechanical device applied to the minimum limit of a shield-type support. Background Technology

[0002] Hydraulic supports are generally equipped with limit devices to restrict their minimum height. Existing technical solutions involve adding a mechanical limit plate below the four-link support to control the posture of the hydraulic support and prevent interference and collision between internal components when the support reaches its lowest position. For example, the hydraulic support limit structure disclosed in Chinese Utility Model Patent CN201420604573.0 has a right-angle groove inclinedly formed on the main stiffener plate, and a limit block is welded in the right-angle groove. One side of the right-angle groove is parallel to the contact end face of the front link and the limit block when the hydraulic support is lowered to the lower limit, and the other side of the right-angle groove is perpendicular to the contact end face of the front link and the limit block when the hydraulic support is lowered to the lower limit. The welding surface of the limit block is parallel to the contact end face of the front link.

[0003] However, while existing mechanical limiting methods can meet the minimum limiting requirements of most supports, their minimum limiting height is fixed, and the commonly used minimum limiting height is still relatively high. In some special working conditions, such as when the roadway is low and the entire support is being transported underground, the minimum height needs to be lowered to ensure it can be transported to the coal face. In such cases, a single minimum limiting device cannot meet the requirements, and the support must be disassembled to meet the underground lowering requirements. Furthermore, the support needs to be reinstalled after being lowered underground, greatly increasing the difficulty of lowering the support underground.

[0004] One solution, such as the hydraulic support and its limiting device disclosed in Chinese Utility Model Patent CN201320006837.8, includes a limiting block for restricting the rotation of the hydraulic support connecting rod by being installed on the main rib of the hydraulic support base, and a limiting plate installed on the limiting block for restricting the rotation of the hydraulic support connecting rod. In this disclosure, the limiting block provides a minimum limit, and then limiting plates of different heights are installed to achieve different height limits. However, this requires the limiting plate to be installed in an installation groove, which is formed by the limiting block and a plate on the main rib of the base. Because of the limited space in this installation groove located between the hydraulic support base and the connecting rod, it is difficult to install the limiting plate into the groove; the hydraulic support needs to be raised to a certain extent to make room for the limiting plate.

[0005] In order to solve the above problems, people have been seeking an ideal technological solution. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings of the existing technology by providing a mechanical device for the minimum limit of a shield-type support. By installing a side plate on the side of the limit block, the pad is installed on the limit block. The process of adding a detachable baffle is easy to operate, giving the hydraulic support a flexible and variable minimum mechanical limit.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: it includes a limiting block and a detachable baffle. The detachable baffle includes a side plate and a pad. The side plate and the pad are connected. The side plate is disposed on the side of the limiting block to realize the installation of the detachable baffle. The limiting block is used to restrict the rotation of the front connecting rod between the hydraulic support front connecting rod and the hydraulic support base. The pad is used to increase the limiting thickness of the limiting block to change the minimum limiting height of the hydraulic support.

[0008] In this application, a detachable baffle installed on the limiting block can limit the hydraulic support to different heights, making the minimum limiting height of the hydraulic support adaptable to various working conditions. The detachable side plate is installed on the limiting block through the side plate of the detachable baffle, so that the pad connected to the side plate can play the role of increasing the limiting thickness of the limiting block to change the limiting height of the hydraulic support base. This method of installing the detachable baffle is easy to install because there is a large space at the side plate, and the space required for pad assembly is small, without having to raise the hydraulic support too much.

[0009] Based on the above, the two side plates and the pad plate arranged side by side form a U-shaped detachable baffle, which is sleeved on the limiting block.

[0010] By using two side panels arranged side by side and a connector that connects the two side panels, the U-shaped detachable baffle can be more securely installed on the limiting block.

[0011] Based on the above, the two side plates are connected by a connector, and the U-shaped detachable baffle and the connector form a surrounding latch around the limiting block.

[0012] By using a surrounding latch, the connector is prevented from passing through the limiting block, thus avoiding the need to drill holes in the limiting block and ensuring the structural strength of the limiting block.

[0013] Based on the above, the connector adopts a pin, and the pin is locked by a cotter pin.

[0014] The removable baffle can be quickly and easily installed and locked onto the limit block using pins and cotter pins.

[0015] Based on the above, the limiting block is used to be installed on the main stiffening plate of the hydraulic support base to restrict the rotation of the front connecting rod. The limiting block is inclined as a whole so that its top surface is flush with and abuts the front connecting rod.

[0016] By installing the limiting block on the main stiffener plate and the pad of the removable baffle on the top surface of the limiting block, the installation of the removable baffle is made more convenient. By making the top surface of the limiting block flush with the front connecting rod, the force is more even when the limiting block is in direct contact with the front connecting rod, thus avoiding deformation caused by uneven force.

[0017] Based on the above, the top surface of the pad is set as an inclined slope, which is used to accommodate the increased rotation angle of the front connecting rod due to the thickness of the pad, so that the inclined slope is flush with the front connecting rod.

[0018] The inclined surface of the pad plate can offset the angle change of the front link caused by the change of the minimum limit height, and make the top surface of the pad plate flush with the front link, so that the force is more even when the pad plate is in direct contact with the front link, avoiding deformation caused by uneven force.

[0019] Based on the above, support blocks extend downward from both ends of the limiting block body, and the support blocks are used to fix the limiting block body between the two main stiffening plates.

[0020] The support block can enhance the connection strength of the mounting part of the limit block and the overall structural strength.

[0021] Based on the above, the outer side of the support block is provided with a stepped cross section, the stepped cross section is parallel to the top surface of the limiting block, and the main stiffener plate is provided with a right-angle groove, the stepped cross section is flush with and abuts one side of the right-angle groove.

[0022] The stepped end face on the support block and the right-angle groove on the main stiffener plate enhance the load-bearing capacity and connection strength of the support block itself, thus preventing connection failure.

[0023] Based on the above, the limiting block body and the supporting block are integrally formed.

[0024] By combining the main body of the limiting block with the support block, the structural strength of the limiting block can be improved.

[0025] Based on the above, the limiting block is used to be installed on the front connecting rod to restrict the rotation of the front connecting rod, and the top surface of the limiting block is inclined to be flush with and abut against the main stiffening plate of the hydraulic support base.

[0026] By installing the limit block on the front connecting rod, the minimum height limit of the hydraulic support can also be achieved, which is suitable for some special hydraulic support base structures and improves the adaptability of this device.

[0027] This utility model has substantial features and advancements compared to existing technologies. Specifically, by adding a detachable baffle to the limiting block, the hydraulic support has a flexible and variable minimum mechanical limit, improving the adaptability of the support under various working conditions. At the same time, the detachable baffle and the limiting block are connected by a pin and a cotter pin, which can be disassembled and installed quickly at any time, facilitating downhole operations. By using pads of different thicknesses and top surfaces with different angles of inclination, the height combination of the pads can adapt to various different support types and heights. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure and some detailed structures of this utility model; Figure 2 This is a schematic diagram showing some detailed structure of the limiting block of this utility model; Figure 3 This is a three-dimensional structural diagram of the detachable baffle of this utility model; Figure 4 This is a structural schematic diagram of the detachable baffle of this utility model from the front view angle.

[0029] In the figure, the attached reference numerals are: limiting block 1, support block 11; detachable baffle 2, side plate 21, pad 22, pin 23; main stiffener plate 3, right angle groove 31; front connecting rod 4. Detailed Implementation

[0030] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0031] Example 1 like Figures 1-4 As shown, the mechanical device applied to the minimum limit of the shield support in this embodiment includes a limiting block 1 and a detachable baffle 2. The limiting block 1 can independently limit the rotation angle of the front link 4. The limiting block 1 can also cooperate with the detachable baffle 2 to limit the rotation angle of the front link 4. Furthermore, the limiting block 1 can cooperate with detachable baffles 2 of different thicknesses to limit the rotation angle of the front link 4, so as to achieve different height limits for the hydraulic support.

[0032] The limiting block 1 can be installed on the front connecting rod 4 or the main stiffening plate 3 of the hydraulic support base. Specifically, the limiting block 1 can be welded to the front connecting rod 4 or the main stiffening plate 3.

[0033] The limiting block 1 is used to restrict the rotation of the front connecting rod 4 between the hydraulic support and the hydraulic support base; at this time, the limiting height achieved by the limiting block 1 on the hydraulic support is the lowest limiting height.

[0034] The detachable baffle 2 includes a side plate 21 and a pad 22. The pad 22 is provided on the limiting block 1 to increase the limiting thickness of the limiting block 1, thereby increasing the restricted rotation angle of the front connecting rod 4 and enabling the hydraulic support to change its minimum limiting height. Installing pads 22 of different thicknesses on the limiting block 1 can change the limiting height of the hydraulic support.

[0035] Among them, the side plate 21 and the pad plate 22 are connected. The angle between the side plate 21 and the pad plate 22 is adapted to the angle between the side and the contact surface of the limiting block 1. The contact surface of the limiting block 1 refers to the surface that abuts against the main stiffening plate 3 (when the limiting block 1 is installed on the front connecting rod 4) or the front connecting rod 4 (when the limiting block 1 is installed on the main stiffening plate 3). The side refers to the surface on both sides of the contact surface. The side plate 21 is installed on the side of the limiting block 1, and the pad plate 22 is installed on the contact surface of the limiting block 1.

[0036] For example, the limiting block 1 can be a rectangular block. Compared with the thin plate-shaped limiting block, the rectangular block has high structural strength, and the edges of the rectangular block ensure that the detachable baffle 2 will not shift circumferentially after being installed on the rectangular block.

[0037] For example, the side plate 21 and the pad 22 can be connected by welding.

[0038] Side plate 21 is provided on the side of limit block 1 to realize the installation of detachable baffle 2. That is, when side plate 21 is installed in place, pad 22 will also be installed in place. For example, side plate 21 is fixedly installed on the side of limit block 1 by bolts or pins to realize the overall installation of detachable baffle 2. Pad 22 is installed on the contact surface of limit block 1 to increase the limiting thickness of limit block 1.

[0039] The detachable baffle 2 installed in this way only requires a small space between the main stiffener plate 3 and the front connecting rod 4 to install the detachable baffle 2 onto the limit block. It does not require excessive raising of the hydraulic support, and the assembly space is large, making the installation operation easy.

[0040] In this application, the detachable baffle 2 installed on the limiting block 1 can limit the hydraulic support to different heights, so that the minimum limiting height of the hydraulic support can be adapted to various working conditions. The detachable side plate is installed on the limiting block 1 through the side plate 21 of the detachable baffle 2, so that the pad 22 connected to the side plate 21 can play the role of increasing the limiting thickness of the limiting block 1 to change the limiting height of the hydraulic support base. This method of installing the detachable baffle 2 is easy to install because the side plate 21 has a large space. The space required for the pad 22 assembly is small, and there is no need to raise the hydraulic support too much.

[0041] Example 2 Based on embodiment 1, two side plates 21 and a pad 22 arranged side by side form a U-shaped detachable baffle 2, which is fitted onto the limiting block 1.

[0042] By using two side plates 21 arranged side by side and a connector that connects the two side plates 21, the U-shaped detachable baffle 2 can be more securely installed on the limiting block 1.

[0043] Based on the above, the two side plates 21 are connected by a connector, and the U-shaped detachable baffle 2 and the connector form a ring lock around the limiting block 1; for example, the connector can be a bolt or a pin 23; for example, the limiting block 1 can be a rectangular block to prevent circumferential rotation of the ring lock; for example, the two ends of the limiting block 1 are welded to the main stiffening plate 3 or the front connecting rod 4 to prevent axial displacement around the left rear.

[0044] By using a surrounding latch, the connector is prevented from passing through the limiting block 1, thus avoiding the need for holes in the limiting block 1 and ensuring the structural strength of the limiting block 1.

[0045] Based on the above, the connector adopts pin 23, which is locked by a cotter pin.

[0046] The removable baffle 2 can be quickly and easily installed and locked onto the limit block 1 using the pin 23 and the cotter pin.

[0047] Example 3 Based on Embodiment 1 or Embodiment 2, the limiting block 1 is installed on the main stiffening plate 3 of the hydraulic support base to restrict the rotation of the front connecting rod 4. The limiting block 1 is inclined as a whole so that its top surface is flush with and abuts against the front connecting rod 4.

[0048] By installing the limiting block 1 on the main stiffening plate 3 and the pad 22 of the removable baffle 2 on the top surface of the limiting block 1, the process of installing the removable baffle 2 is made more convenient; by making the top surface of the limiting block 1 flush with the front connecting rod 4, the force is more even when the limiting block 1 and the front connecting rod 4 are in direct contact, thus avoiding deformation caused by uneven force.

[0049] Based on the above, such as Figure 4 As shown, the top surface of the pad 22 is set as an inclined slope. The inclined slope is used to accommodate the increased rotation angle of the front connecting rod 4 due to the thickness of the pad 22, so that the inclined slope is flush with the front connecting rod 4.

[0050] Using the pad 22 on the limiting block 1 increases the overall limiting thickness. Changing the thickness of the pad 22 also changes the overall limiting thickness, thus causing a change in the minimum limiting height of the hydraulic support. The limiting angle of the front link 4 also changes (for example, due to the change in limiting thickness, the angle between the front link 4 and the hydraulic support base changes from a° to b°). Because of the change in the angle of the front link 4, simply increasing the thickness will cause the top surface of the pad 22 to not be flush with the front link 4 at the minimum limiting height due to the change in angle, resulting in an angular deviation between the two. Therefore, the pad 22 is designed to offset this deviation by using an inclined surface. In this way, when the hydraulic support is lowered to the minimum limiting height, the pad 22 can always be flush with the front link 4 even if the limiting thickness of the overall limiting mechanism is changed.

[0051] The inclined surface of the top surface of the pad 22 can offset the angle change of the front link 4 caused by the change of the minimum limit height, and make the top surface of the pad 22 flush with the front link 4, so that the force is more even when the pad 22 and the front link 4 are in direct contact, and avoid deformation caused by uneven force.

[0052] Example 4 Based on Embodiment 1, Embodiment 2, or Embodiment 3, support blocks 11 extend downward from both ends of the main body of the limiting block 1. The support blocks 11 are used to fix the main body of the limiting block 1 between the two main stiffening plates 3. The support blocks 11 can be connected to the main stiffening plates 3 by welding.

[0053] The support block 11 can enhance the connection strength of the mounting part of the limit block 1 and the overall structural strength.

[0054] Based on the above, the outer side of the support block 11 is provided with a stepped section, which is parallel to the top surface of the limiting block 1. The main stiffener plate 3 is provided with a right-angle groove 31, and the stepped section is flush with and abuts one side of the right-angle groove 31.

[0055] The stepped end face on the support block 11 and the right-angle groove 31 on the main stiffening plate 3 enhance the load-bearing capacity and connection strength of the support block 11, thus preventing connection failure.

[0056] Based on the above, the main body of the limiting block 1 and the support block 11 are integrally formed.

[0057] By combining the main body of the limiting block 1 and the support block 11, the structural strength of the limiting block 1 can be improved.

[0058] Example 5 The difference between this embodiment and embodiment 3 is that the limiting block 1 is no longer installed on the main stiffening plate 3 of the hydraulic support base, but is installed on the front connecting rod 4. Specifically, the limiting block 1 is used to install on the front connecting rod 4 to restrict the rotation of the front connecting rod 4, and the top surface of the limiting block 1 is inclined to be flush with and abut against the main stiffening plate 3 of the hydraulic support base.

[0059] By installing the limiting block 1 on the front connecting rod 4, the minimum height of the hydraulic support can also be limited, which is suitable for some special hydraulic support base structures and improves the adaptability of this device.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A mechanical device applied to the minimum limit of a shield-type support, characterized in that, The device includes a limiting block (1) and a detachable baffle (2). The detachable baffle (2) includes a side plate (21) and a pad (22). The side plate (21) and the pad (22) are connected. The side plate (21) is located on the side of the limiting block (1) to enable the installation of the detachable baffle (2). The limiting block (1) is used to restrict the rotation of the front connecting rod (4) between the hydraulic support and the hydraulic support base. The pad (22) is used to increase the limiting thickness of the limiting block (1) to change the minimum limiting height of the hydraulic support.

2. The mechanical device for the minimum limit of a shield-type support according to claim 1, characterized in that, The two side plates (21) and the pad plate (22) arranged side by side form a U-shaped removable baffle (2), which is fitted onto the limiting block (1).

3. The mechanical device for the minimum positioning of a shield-type support according to claim 2, characterized in that, The two side plates (21) are connected by a connector, and the U-shaped detachable baffle (2) and the connector form a surrounding latch around the limiting block (1).

4. The mechanical device for the minimum positioning of a shield-type support according to claim 3, characterized in that, The connector uses a pin (23), which is locked by a cotter pin.

5. The mechanical device for the minimum limit of a shield-type support according to claim 1, characterized in that, The limiting block (1) is installed on the main stiffening plate (3) of the hydraulic support base to restrict the rotation of the front connecting rod (4). The limiting block (1) is inclined as a whole so that its top surface is flush with the front connecting rod (4).

6. The mechanical device for the minimum positioning of a shield-type support according to claim 5, characterized in that, The top surface of the pad (22) is set as an inclined slope, which is used to accommodate the restricted rotation angle of the front link (4) due to the increased thickness of the pad (22), so that the inclined slope is flush with the front link (4).

7. The mechanical device for the minimum positioning of a shield-type support according to claim 6, characterized in that, The limiting block (1) has support blocks (11) extending downward at both ends of its main body. The support blocks (11) are used to fix the main body of the limiting block (1) between the two main stiffening plates (3).

8. The mechanical device for the minimum positioning of a shield-type support according to claim 7, characterized in that, The outer side of the support block (11) is provided with a stepped cross section, which is parallel to the top surface of the limiting block (1). The main stiffener plate (3) is provided with a right-angle groove (31), and the stepped cross section is flush with and abuts one side of the right-angle groove (31).

9. The mechanical device for the minimum positioning of a shield-type support according to claim 7, characterized in that, The limiting block (1) and the supporting block (11) are integrally formed.

10. The mechanical device for the minimum positioning of a shield-type support according to claim 1, characterized in that, The limiting block (1) is used to be installed on the front connecting rod (4) to restrict the rotation of the front connecting rod (4). The top surface of the limiting block (1) is inclined to be flush with the main stiffening plate (3) of the hydraulic support base.

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