A device for withdrawing hydraulic supports to the center of a roadway

Abstract

The utility model discloses a device is withdrawn to the device of hydraulic support to the roadway center, include: the withdrawal base, the first pull -up oil cylinder, its fixed end is fixed on the rotary plate, its movable end extends to left, the head lifting casing, the head lifting pull rod, from left to right obliquely upwards to set, its left end is hinged with the movable end of first pull -up oil cylinder, its right end is hinged with the left end of head lifting casing, and then when the movable end of first pull -up oil cylinder stretches out to left, the left end of head lifting casing is rotated down, and then make the head lifting casing with its hinge point with rotary plate as center rotate, and make the right end of head lifting casing rotate upwards, and then give the hydraulic support to be withdrawn to the upward tension of the hydraulic support, the utility model discloses can realize the accurate positioning of hydraulic support, efficient traction, flexible rotation, the utility model discloses through the function such as integrated rotary drive, accurate traction, guiding adjustment, realizes the efficient safe withdrawal of support.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic support retraction, and in particular relates to a device for retracting hydraulic supports to the center of a roadway. Background Technology

[0002] In the mining cycle of a fully mechanized coal mining face, hydraulic supports, as core equipment supporting the roof and ensuring the safety of the working space, are crucial for the final stage of the face's operation. When the fully mechanized mining face advances to the stop line, the hydraulic supports need to be withdrawn from the face to the center of the transport roadway so that they can be transferred to a new face for reuse using flatbed trucks or other transport equipment. This process requires not only efficient support withdrawal but also accurate alignment with the roadway center. If the supports are off-center, they are prone to colliding with the roadway walls during subsequent transport, damaging the support structure or roadway support facilities, increasing maintenance costs. Furthermore, off-center supports will occupy more roadway space, affecting the passage of other equipment and prolonging the entire final stage of the project.

[0003] However, the current hydraulic support retraction operation still generally adopts traditional methods, such as winch traction with pulley block, simple hydraulic jack pushing, or manual adjustment. These methods have many insurmountable defects, which seriously restrict the retraction efficiency and safety.

[0004] Existing drawback methods have the following drawbacks: 1. Poor positioning accuracy makes it difficult to accurately align with the center of the tunnel. Workers need to adjust the steel cable fixing points or move the pulley block multiple times to correct the offset, which seriously prolongs the retreat cycle and greatly affects the mine's continuity efficiency. 2. Unstable traction output, making it difficult to adapt to the needs of heavy-duty supports. The pulling force output of traditional pullback devices (such as ordinary hydraulic jacks) is usually between 10 and 30 tons, and due to the lack of an effective force transmission structure, the pulling force is easily dispersed and cannot form a continuous and concentrated traction force, which increases the maintenance cost of the support. 3. Difficult to rotate and adjust, posing a safety hazard. 4. Low level of automation, high labor intensity for workers, and poor safety. In recent years, safety accidents caused by retreat operations have accounted for 15%-20% of coal mine accidents, becoming a key and difficult point in mine safety management. These shortcomings collectively result in traditional retreat operations being inefficient, unsafe, and labor-intensive, failing to meet the demands of modern coal mines for efficient, safe, and intelligent mining. Utility Model Content

[0005] The purpose of this invention is to provide a device for retracting hydraulic supports to the center of a roadway, so as to solve the problem of low efficiency caused by poor positioning accuracy and low automation in the retraction of traditional hydraulic supports.

[0006] This utility model adopts the following technical solution: a device for retracting a hydraulic support to the center of a roadway, comprising: The retractable base is horizontally positioned; a rotating plate is located at its center; its left side is fixedly connected to the bottom of a hydraulic support located on the side. The first lifting cylinder has its fixed end fixed to the rotating plate and its movable end extending to the left. The head-up housing is "V" shaped with its opening facing upwards and is placed horizontally above the first lifting cylinder. The lower end of the first lifting cylinder is hinged to the rotating plate. The left and right ends of the first lifting cylinder are tilted upwards, and a chain and hook are fixedly connected to the right end of the first lifting cylinder. The lifting rod is inclined upward from left to right. Its left end is hinged to the movable end of the first lifting cylinder, and its right end is hinged to the left end of the lifting housing. When the movable end of the first lifting cylinder extends to the left, it pulls the left end of the lifting housing downward, causing the lifting housing to rotate around its hinge point with the rotating plate. This causes the right end of the lifting housing to rotate upward, thereby applying an upward pulling force to the hydraulic support to be retracted.

[0007] The beneficial effects of this utility model are: This invention enables precise positioning, efficient traction, and flexible rotation of hydraulic supports. By integrating functions such as rotation drive, precise traction, and guide adjustment, this invention achieves efficient and safe retraction of the supports. This utility model, by setting a first lifting cylinder and a lifting rod, can make the right end of the lifting housing press down or lift up. When pressed down, it provides a larger horizontal component force to the hydraulic support, and when lifted up, it provides a larger vertical component force to the hydraulic support, thereby enabling the hydraulic support to be quickly retracted. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is the left view of the present invention; Figure 3 This is a schematic diagram of the structure of the head-up housing when the right end is raised. Figure 4 This is a schematic diagram of the structure of the right end of the head-up housing of this utility model when it is pressed down; Figure 5 This is a schematic diagram of the retraction hydraulic support and the side hydraulic support of this utility model.

[0009] Among them: 10. Retractable base; 11. First lifting cylinder; 12. Head-up housing; 13. Rotating plate; 14. Head-up pull rod; 15. Extending housing; 16. Rotating housing; 17. Rotating cylinder; 18. Rack; 19. Gear; 20. First base; 21. Guide rail; 22. Guide plate; 23. Connecting housing; 25. Clamping plate. Detailed Implementation

[0010] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0011] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more. The term "orientation" in this utility model refers to the orientation of the utility model within the... Figure 1 Description of the state's progression.

[0012] This utility model discloses a device for retracting a hydraulic support to the center of a roadway, such as... Figure 1 and Figure 2 As shown, it includes: a retraction base 10, a first lifting cylinder 11, a head-up housing 12, and a head-up lever 14.

[0013] The retraction base 10 is horizontally positioned; a rotating plate 13 is positioned at the center of the retraction base 10; the left side of the retraction base 10 is fixedly connected to the bottom of the hydraulic support located on the side.

[0014] The fixed end of the first lifting cylinder 11 is fixed on the rotating plate 13; the movable end of the first lifting cylinder 11 extends to the left.

[0015] The head-up housing 12 is "V" shaped with its opening facing upward. The head-up housing 12 is placed horizontally above the first lifting cylinder 11. The lower end of the first lifting cylinder 11 is hinged to the rotating plate 13. The left and right ends of the first lifting cylinder 11 are tilted upward. A chain and a hook are fixedly connected to the right end of the first lifting cylinder 11.

[0016] The lifting rod 14 is inclined upward from left to right. The left end of the lifting rod 14 is hinged to the movable end of the first lifting cylinder 11, and the right end of the lifting rod 14 is hinged to the left end of the lifting housing 12. When the movable end of the first lifting cylinder 11 extends to the left, it pulls the left end of the lifting housing 12 to rotate downward, thereby causing the lifting housing 12 to rotate around its hinge point with the rotating plate 13, and causing the right end of the lifting housing 12 to rotate upward, thereby giving the hydraulic support to be retracted an upward pulling force.

[0017] The inner cavity of the head-up housing 12 is equipped with a second lifting cylinder. The fixed end of the second lifting cylinder is located on the left, and the movable end of the second lifting cylinder is located on the right. The right end of the second lifting cylinder is fixedly connected to an extension housing 15. The extension housing 15 is used to extend to the right under the push of the second lifting cylinder, thereby extending the length of the head-up housing 12 and thus giving the hydraulic support to be retracted an upward pulling force.

[0018] The retraction base 10 includes: a rotating housing 16, a rotating hydraulic cylinder 17, a rack 18, and a gear 19.

[0019] The rotating housing 16 is a housing structure with an open top and closed sides; the rotating cylinder 17 is fixed inside the rotating housing 16; the rack 18 is fixed to the movable end of the rotating cylinder 17; the rack 18 is used to move horizontally under the drive of the rotating cylinder 17.

[0020] Gear 19 meshes with rack 18, and gear 19 is used to rotate under the drive of rack 18; rotating plate 13 is fixedly connected to the upper side of gear 19.

[0021] The first lifting cylinder 11 is fixed to the rotating plate 13 via the first base 20. Two guide rails 21 are also fixedly connected to the left end of the first base 20. The two guide rails 21 are parallel to each other and horizontally arranged. The guide groove formed between the two guide rails 21 is used to accommodate the guide plate 22. The guide plate 22 is hinged to the left end of the lifting rod 14, so that the guide plate 22 moves back and forth along the guide groove under the drive of the first lifting cylinder 11, thereby changing the tilt angle of the lifting rod 14.

[0022] The movable end of the rotary cylinder 17 is connected to the rack 18 via a connecting housing 23. The connecting housing 23 is "L" shaped. One end of the connecting housing 23 is fixedly connected to the movable end of the rotary cylinder 17, and the other end is fixedly connected to the rack 18. The direction of the rack 18 is parallel to the installation direction of the rotary cylinder 17. A protrusion is provided in the middle of the lower end of the connecting housing 23. The protrusion is used to extend between two clamping plates 25 installed at the bottom of the retraction base 10, thereby causing the connecting housing 23 to move along the gap between the two clamping plates 25.

[0023] Rotary cylinder 17, rack 18, and gear 19 are each equipped with two Preferably, two connecting housings 23 are also provided.

[0024] The method of using this utility model is as follows: like Figure 1 and Figure 3 As shown, the left side of the retraction base 10 is fixedly connected to the bottom of the hydraulic support located on the side, thus fixing the retraction base 10. At this time, the hydraulic support on the side does not need to be retracted; instead, other hydraulic supports need to be retracted. Furthermore, the hydraulic support on the side is perpendicular to the row of hydraulic supports that need to be retracted, as shown. Figure 5 As shown, the horizontal row of hydraulic supports, i.e., the nine hydraulic supports arranged side by side, needs to be retracted, while the three vertically arranged supports do not need to be retracted at present, because it is necessary to provide a point of leverage for the retracted hydraulic supports.

[0025] Once the retraction base 10 is fixed, it can provide tension to the hydraulic support. The hook can be hung on the bottom of the hydraulic support or other positions. By activating the first lifting cylinder 11, the hydraulic support can be subjected to tension. If the direction of the tension needs to be adjusted during the continuous tension process, the rotating cylinder 17 can be activated to rotate the rotating plate 13, which in turn drives the first lifting cylinder 11 to rotate. This, in turn, rotates the chain and hook, thereby adjusting the direction of the tension on the hydraulic support. This provides the hydraulic support with a tension toward the center of the tunnel and allows the hydraulic support to rotate toward the retraction direction.

[0026] like Figure 3 As shown, when the hydraulic support requires more and greater upward lifting force, the second lifting cylinder can be activated, causing the extension housing 15 to extend outward, thereby extending the length of the head housing 12, and thus directly lifting one side of the hydraulic support through the chain for easy rotation.

[0027] like Figure 4 As shown, when the hydraulic support requires more and greater horizontal tension, the second cylinder can be activated, causing the extended housing 15 to retract into the head housing 12, thereby shortening the length of the head housing 12, that is, pressing the right end of the head housing 12 downward, thus providing more horizontal tension for the hydraulic support and facilitating the movement of the hydraulic support.

[0028] By setting a retraction base 10 with a rotating plate 13 that can rotate, the hydraulic support can be rotated after being pulled forward in a straight line, so that it can be rotated to face the retraction direction, thereby facilitating the hydraulic support to retract while pressing against the track.

[0029] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for retracting hydraulic supports to the centre of a roadway, characterised in that, include: The retractable base (10) is horizontally positioned; a rotating plate (13) is positioned at its center. Its left side is fixedly connected to the bottom of the hydraulic support located on the side; The first lifting cylinder (11) has its fixed end fixed to the rotating plate (13); its movable end extends to the left. The head-up housing (12) is "V" shaped with its opening facing upwards and is placed horizontally above the first lifting cylinder (11). The lower end of the first lifting cylinder (11) is hinged to the rotating plate (13). The left and right ends of the first lifting cylinder (11) are tilted upwards, and the right end of the first lifting cylinder (11) is fixedly connected with a chain and a hook. The lifting rod (14) is inclined upward from left to right. Its left end is hinged to the movable end of the first lifting cylinder (11), and its right end is hinged to the left end of the lifting housing (12). When the movable end of the first lifting cylinder (11) extends to the left, it pulls the left end of the lifting housing (12) downward to rotate, thereby causing the lifting housing (12) to rotate around the hinge point with the rotating plate (13) and causing the right end of the lifting housing (12) to rotate upward, thereby giving the hydraulic support to be retracted an upward pulling force.

2. A device for retracting hydraulic supports to the center of a roadway according to claim 1, characterized in that, The inner cavity of the head-up housing (12) is equipped with a second lifting cylinder. The fixed end of the second lifting cylinder is located on the left and its movable end is located on the right. The right end of the second lifting cylinder is fixedly connected to an extension housing (15). The extension housing (15) is used to extend to the right under the push of the second lifting cylinder, thereby extending the length of the head-up housing (12) and thus giving the hydraulic support to be retracted an upward pulling force.

3. The device for retracting a hydraulic support to the center of a roadway according to claim 1, characterized in that, The retraction base (10) includes: Rotating shell (16); is a shell structure with an open top and closed sides; A rotary cylinder (17) is fixed inside the rotary housing (16); A rack (18) is fixed to the movable end of the rotary cylinder (17); it is used to move horizontally under the drive of the rotary cylinder (17). Gear (19) meshes with rack (18) and is used to rotate under the drive of rack (18); rotating plate (13) is fixedly connected to the upper side of gear (19).

4. The device for retracting a hydraulic support to the center of a roadway according to claim 1, characterized in that, The first lifting cylinder (11) is fixed on the rotating plate (13) by the first base (20). The left end of the first base (20) is also fixedly connected to two guide rails (21). The two guide rails (21) are parallel to each other and horizontally arranged. The guide groove formed between the two guide rails (21) is used to accommodate the guide plate (22). The guide plate (22) is hinged to the left end of the head-up lever (14), so that the guide plate (22) moves back and forth along the guide groove under the drive of the first lifting cylinder (11), thereby causing the tilt angle of the head-up lever (14) to change.

5. The device for retracting a hydraulic support to the center of a roadway according to claim 3, characterized in that, The movable end of the rotary cylinder (17) is connected to the rack (18) through a connecting housing (23). The connecting housing (23) is "L" shaped. One end of the connecting housing (23) is fixedly connected to the movable end of the rotary cylinder (17), and the other end is fixedly connected to the rack (18). The direction of the rack (18) is parallel to the installation direction of the rotary cylinder (17). A protrusion is provided in the middle of the lower end of the connecting housing (23). The protrusion is used to extend between two clamping plates (25) installed at the bottom of the retraction base (10), thereby causing the connecting housing (23) to move along the gap between the two clamping plates (25).

6. The device for retracting a hydraulic support to the center of a roadway according to claim 3, characterized in that, Two of each of the rotary cylinder (17), rack (18), and gear (19) are provided.

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