Hydraulic support capable of being integrally pulled and withdrawn

Abstract

The utility model relates to the technical field of hydraulic supports, and discloses a hydraulic support capable of being integrally pulled and withdrawn. The hydraulic support capable of being integrally pulled and withdrawn comprises a support body, a base is arranged at the bottom of the support body, connecting shafts are installed at the left end and the right end of the base in a penetrating mode, a front roller frame is movably installed on the left side of the base, a front supporting roller is movably installed at the tail end of the front roller frame, and a rear roller frame is movably installed on the right side of the base. A front supporting roller is movably installed at the tail end of the front roller frame, a rear supporting roller is movably installed at the tail end of the rear roller frame, a base is fixedly installed above the base, a switching block is movably installed in the base, after the adjusting piston reaches the extension limit, the base can be lifted through the front roller frame and the rear roller frame, and the base and the support are supported through the front supporting roller and the rear supporting roller; the front supporting roller and the rear supporting roller are rotationally connected with the front roller frame and the rear roller frame correspondingly, and in the pulling and withdrawing process, resistance can be reduced in a rotating mode, so that moving is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic support technology, specifically a hydraulic support that can be pulled back as a whole. Background Technology

[0002] Hydraulic supports are structures used to control mine pressure in coal mining faces. The mine pressure acts on the hydraulic supports as an external load. In the mechanical system of interaction between the hydraulic supports and the surrounding rock of the mining face, if the resultant force of all supporting components of the hydraulic support is exactly linear with the resultant force of the external load acting on the hydraulic support from the roof, then the hydraulic support is highly suitable for the surrounding rock of that mining face.

[0003] The existing Chinese utility model patent with publication number CN210152699U discloses a lightweight top coal caving hydraulic support. It includes a base, a top beam, a column hydraulic cylinder connected between the top beam and the base, and a guide mechanism. A forward extension beam is inserted into the front of the top beam, and two forward extension beam hydraulic cylinders are located at the bottom of the top beam. The piston rods of the forward extension beam hydraulic cylinders are connected to the bottom of the forward extension beam. A side guard plate is provided at the front end of the forward extension beam, and two connecting arms are provided on both sides of the lower part of the side guard plate. The connecting arms are hinged to the front part of the forward extension beam. A first connecting plate is hinged to the middle of the bottom of the side guard plate, and a second connecting plate corresponding to the first connecting plate is hinged to the middle of the bottom of the forward extension beam. The other ends of the first and second connecting plates are respectively hinged to the piston rods of the side guard plate cylinders, which are hinged to the bottom of the forward extension beam. This device adds a side guard plate, which can effectively block the oncoming coal seam, preventing the coal seam from leaking down at that position and improving work efficiency.

[0004] Hydraulic supports require a large contact area between their bottom and the tunnel floor during use to ensure that the force applied by the hydraulic supports is evenly distributed across the ground. This structure results in excessive friction between the bottom and the ground during pull-back operations, leading to high resistance. Furthermore, due to the weight of the hydraulic supports, multiple traction cables are typically used in conjunction during pull-back operations, and it is crucial to maintain uniform stress among the cables. Otherwise, the cables may break due to excessive stress. However, existing hydraulic supports cannot visually demonstrate the stress on each cable, posing a potential safety hazard. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the shortcomings of the existing technology, this utility model provides a hydraulic support that can be pulled back as a whole, which has the advantages of easy movement and can intuitively show the stress of each steel cable, thus solving the above-mentioned technical problems.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic support that can be pulled back as a whole, comprising: a support, a base at the bottom of the support, connecting shafts inserted at the left and right ends of the base, a front roller frame movably mounted on the left side of the base, a front support roller movably mounted at the end of the front roller frame, a rear roller frame movably mounted on the right side of the base, a rear support roller movably mounted at the end of the rear roller frame, a base fixedly mounted on the top of the base, a transition block movably mounted inside the base, an adjusting piston fixedly mounted on one side of the transition block, transmission blocks fixedly mounted on the upper ends of the front and rear roller frames, a limit block fixedly mounted on the left side of the front roller frame, a limit switch fixedly mounted inside the limit block, an indicator light fixedly mounted above the limit block, and a hanging ring movably mounted inside the limit block; the base can increase the contact area between the support and the ground.

[0009] As a preferred embodiment of this utility model, the connecting shaft is fixedly connected to the base, and the front roller frame, the rear roller frame and the connecting shaft are rotatably connected; the connecting shaft facilitates the rotatable connection between the front roller frame, the rear roller frame and the base.

[0010] As a preferred embodiment of this utility model, the front support roller and the front roller frame are rotatably connected, and the rear support roller and the rear roller frame are rotatably connected; the front support roller and the rear support roller are easy to move.

[0011] As a preferred embodiment of this utility model, the base is symmetrically installed above the base with the center of the base as the reference, and the base and the adapter block are rotatably connected; the base can restrict the position of the adapter block.

[0012] As a preferred embodiment of this utility model, the adapter block is mirror-symmetrically mounted on both ends of the adjusting piston with the center of the adjusting piston as a reference, and the movable end of the adjusting piston is connected to the transmission block through the adapter block; the adjusting piston can adjust the rotation angle between the front roller frame and the rear roller frame.

[0013] As a preferred technical solution of this utility model, the adapter block and the transmission block form a rotatable connection, and there are four limiting blocks, which are installed at equal intervals on the left side of the front roller frame; the limiting blocks can restrict the position of the hanging ring.

[0014] As a preferred embodiment of this utility model, the movable end of the limit switch is fixedly connected to the right end of the hanging ring, and the hanging ring and the limit block form a sliding connection; the limit switch can turn on the indicator light after the hanging ring moves.

[0015] Compared with the prior art, this utility model provides a hydraulic support that can be pulled back as a whole, which has the following advantages:

[0016] 1. This utility model, through the setting of the adjusting piston, can drive the front roller frame and the rear roller frame to rotate around the center of the connecting shaft when the adjusting piston extends and retracts, thereby adjusting the angle of the front roller frame and the rear roller frame and adjusting the distance between the front support roller and the rear support roller and the ground. When the adjusting piston extends, the front support roller and the rear support roller will move towards the ground under the drive of the front roller frame and the rear roller frame. After the adjusting piston reaches the extension limit, the front roller frame and the rear roller frame will lift the base, and the front support roller and the rear support roller will support the base and the bracket. The front support roller and the rear support roller are rotatably connected to the front roller frame and the rear roller frame respectively. During the pulling and retraction process, the resistance can be reduced by rotation to facilitate movement.

[0017] 2. This utility model uses a limit switch to connect the traction cable to the front roller frame via a hanging ring. One end of the hanging ring is fixedly connected to the movable end of the limit switch. When the hanging ring is under force, it will stretch the limit switch. Since the limit switch and the indicator light are connected in series, the indicator light will only light up when its own switch is open and the limit switch is in the stretched open state. When there is a loose connection in the steel cable connected to the hanging ring, the limit switch cannot receive sufficient tension and will close, causing the indicator light to go out, thus reminding the operator that the traction cable is not being stretched evenly. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the connecting shaft mounting structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the adjusting piston installation structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the installation structure of the limit switch of this utility model;

[0022] The components are: 1. Bracket; 11. Base; 12. Connecting shaft; 13. Front roller frame; 14. Front support roller; 15. Rear roller frame; 16. Rear support roller; 17. Base; 18. Adapter block; 19. Adjusting piston; 110. Transmission block; 111. Limit block; 112. Limit switch; 113. Indicator light; 114. Hanging ring. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Please see Figure 1 - Figure 4 In this embodiment, a hydraulic support that can be pulled back as a whole includes: a support 1, a base 11 at the bottom of the support 1, connecting shafts 12 inserted at the left and right ends of the base 11, a front roller frame 13 movably mounted on the left side of the base 11, a front support roller 14 movably mounted at the end of the front roller frame 13, a rear roller frame 15 movably mounted on the right side of the base 11, a rear support roller 16 movably mounted at the end of the rear roller frame 15, a base 17 fixedly mounted above the base 11, a transition block 18 movably mounted inside the base 17, an adjusting piston 19 fixedly mounted on one side of the transition block 18, a transmission block 110 fixedly mounted at the upper ends of the front roller frame 13 and the rear roller frame 15, a limit block 111 fixedly mounted on the left side of the front roller frame 13, a limit switch 112 fixedly mounted inside the limit block 111, an indicator light 113 fixedly mounted above the limit block 111, and a hanging ring 114 movably mounted inside the limit block 111.

[0027] The connecting shaft 12 is fixedly connected to the base 11. The front roller frame 13 and the rear roller frame 15 are rotatably connected to the connecting shaft 12. The front support roller 14 is rotatably connected to the front roller frame 13. The rear support roller 16 is rotatably connected to the rear roller frame 15. The base 17 is symmetrically installed above the base 11 with the center of the base 11 as the reference. The base 17 is rotatably connected to the adapter block 18. The adapter block 18 is mirror-symmetrically installed at both ends of the adjusting piston 19 with the center of the adjusting piston 19 as the reference. The movable end of the adjusting piston 19 is connected to the transmission block 110 through the adapter block 18. The adapter block 18 and the transmission block 110 are rotatably connected. There are four limit blocks 111, and the limit blocks 111 are equidistantly installed on the left side of the front roller frame 13. The movable end of the limit switch 112 is fixedly connected to the right end of the hanging ring 114. The hanging ring 114 and the limit block 111 are slidably connected.

[0028] Specifically, the limit switch 112 is model BLX5-L. The base 11 increases the contact area between the support 1 and the ground. The connecting shaft 12 restricts the position of the front roller frame 13, the rear roller frame 15, and the base 11, while allowing the front roller frame 13 and the rear roller frame 15 to rotate. Since the fixed end of the adjusting piston 19 is connected to the base 17 through the adapter block 18, the adjusting piston 19 is symmetrically mounted above the base 11 via the adapter block 18 and the base 17. At the same time, the movable end of the adjusting piston 19 is connected to the transmission block 110 above the front roller frame 13 and the rear roller frame 15 via the adapter block 18. The adapter block 18, the base 17, and the transmission block 110 form a rotatable connection. The front roller frame 13 and the rear roller frame 15 form a rotatable connection with the base 11 via the connecting shaft 12, so that the adjusting piston 19 can drive the front roller frame 13 and the rear roller frame 15 to rotate around the center of the connecting shaft 12 when extending or retracting. The angles of the front roller frame 13 and the rear roller frame 15 are adjusted to adjust the distance between the front support roller 14 and the rear support roller 16 and the ground. The front support roller 14 and the rear support roller 16 are rotatably connected to the front roller frame 13 and the rear roller frame 15, respectively. During the pulling and retraction process, the resistance can be reduced by rotation. The pulling steel cable is connected to the front roller frame 13 through the hanging ring 114. One end of the hanging ring 114 is fixedly connected to the movable end of the limit switch 112. When the hanging ring 114 is under force, it will stretch the limit switch 112. Since the limit switch 112 and the indicator light 113 are connected in series, the indicator light 113 will only light up when its own switch is open and the limit switch 112 is in the stretched open state. When the steel cable connected to the hanging ring 114 is loosely connected, the limit switch 112 cannot receive enough tension and will close, causing the indicator light 113 to go out, thus reminding the operator that the pulling steel cable is not being pulled evenly.

[0029] In use, the angles of the front roller frame 13 and the rear roller frame 15 are adjusted by extending and retracting the piston 19, thereby adjusting the distance between the front support roller 14, the rear support roller 16 and the ground. When the piston 19 reaches its extension limit, the front roller frame 13 and the rear roller frame 15 will lift the base 11, with the front support roller 14 and the rear support roller 16 providing support for the base 11 and the support bracket 1. The front support roller 14 and the rear support roller 16 are rotatably connected to the front roller frame 13 and the rear roller frame 15, respectively. During the pulling and retraction process, resistance can be reduced by rotation, and the hanging ring... 114 connects the traction cable to the front roller frame 13. One end of the hanging ring 114 is fixedly connected to the movable end of the limit switch 112. When the hanging ring 114 is under force, it will stretch the limit switch 112. Since the limit switch 112 is connected in series with the indicator light 113, the indicator light 113 will only light up when its own switch is open and the limit switch 112 is in the stretched open state. When the cable connected to the hanging ring 114 is loosely connected, the limit switch 112 cannot receive enough tension and will close, causing the indicator light 113 to go out, thus reminding the operator that the traction cable is not being stretched evenly.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic support capable of being integrally pulled back, characterized in that, Include: Support (1), the bottom of the support (1) is provided with a base (11), the left and right ends of the base (11) are inserted and mounted with connecting shafts (12), the left side of the base (11) is movably mounted with a front roller frame (13), the distal end of the front roller frame (13) is movably mounted with a front supporting roller (14), the right side of the base (11) is movably mounted with a rear roller frame (15), the distal end of the rear roller frame (15) is movably mounted with a rear supporting roller (16), the upper side of the base (11) is fixedly mounted with a base (17), the inside of the base (17) is movably mounted with an adapter block (18), one side of the adapter block (18) is fixedly mounted with an adjusting piston (19), the upper end of the front roller frame (13) and the rear roller frame (15) is fixedly mounted with a transmission block (110), the left side of the front roller frame (13) is fixedly mounted with a limiting block (111), the inside of the limiting block (111) is fixedly mounted with a limiting switch (112), the upper side of the limiting block (111) is fixedly mounted with an indicating lamp (113), the inside of the limiting block (111) is movably mounted with a hanging ring (114).

2. The hydraulic support of claim 1, wherein: The connecting shaft (12) is fixedly connected with the base (11), and the front roller frame (13) and the rear roller frame (15) are rotatably connected with the connecting shaft (12).

3. The hydraulic support of claim 1, wherein: The front supporting roller (14) is rotatably connected with the front roller frame (13), and the rear supporting roller (16) is rotatably connected with the rear roller frame (15).

4. The hydraulic support of claim 1, wherein: The base (17) is symmetrically installed on the upper side of the base (11) with the center of the base (11) as a reference, and the base (17) is rotatably connected with the adapter block (18).

5. The hydraulic support of claim 1, wherein: The adapter block (18) is symmetrically installed on the two ends of the adjusting piston (19) with the center of the adjusting piston (19) as a reference, and the movable end of the adjusting piston (19) is connected with the transmission block (110) through the adapter block (18).

6. The hydraulic support of claim 1, wherein: The adapter block (18) is rotatably connected with the transmission block (110), and the limiting block (111) has four, and the limiting block (111) is equidistantly installed on the left side of the front roller frame (13).

7. The hydraulic support of claim 1, wherein: The movable end of the limiting switch (112) is fixedly connected with the right end of the hanging ring (114), and the hanging ring (114) is slidably connected with the limiting block (111).

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