Triangular zone lifting device and retrieval system

Abstract

The present application relates to the technical field of coal mine underground mining support, and provides a triangular area lifting device and a withdrawing system.The triangular area lifting device comprises at least two lifting assemblies, each lifting assembly comprises a top support plate and a bottom support plate, a first telescopic piece is arranged between the top support plate and the corresponding bottom support plate, the first telescopic piece comprises a first connecting end connected with the top support plate and a second connecting end connected with the bottom support plate, at least one of the first connecting end and the second connecting end is provided with a spherical connecting piece, a spherical cavity matched with the spherical connecting piece is arranged on the corresponding top support plate and / or bottom support plate, a fixing piece is arranged on the bottom support plate to limit the included angle between the first telescopic piece and the bottom support plate, a second telescopic piece is connected between the two adjacent bottom support plates, and the distance between the two adjacent lifting assemblies is adjusted by changing the length of the second telescopic piece.In this way, the supporting effect of the triangular area lifting device can be ensured.

Description

Technical Field

[0001] This invention relates to the field of underground coal mining support technology, specifically to a triangular zone lifting device and a retraction system. Background Technology

[0002] With the continuous development of underground coal mining technology, the mechanization and automation of underground operations have been continuously improved, which has put forward higher requirements for support safety, equipment recovery and operation efficiency during the mining process.

[0003] In underground coal mine operations, the working face supports are arranged along the goaf, and the shield supports are positioned to one side of the working face supports and perpendicular to them. The working face supports, shield supports, and goaf together form a triangular area, and the roof support of this triangular area directly affects operational safety. Generally, support columns are used to support the roof of the triangular area. Specifically, two support columns work together; one column serves as the support foundation, while the other can rotate around it, thus achieving a rotating, step-like movement to adjust the support position according to the retreat progress.

[0004] However, given the limited space in the triangular area, in order to avoid affecting the rotational and stepping movement of the support column, the support area at the top of the support column is relatively small, which affects the overall support effect. Summary of the Invention

[0005] To at least partially address the problems existing in the prior art, according to one aspect of the present invention, a triangular zone lifting device is provided. The triangular zone lifting device includes at least two lifting assemblies, each lifting assembly including a top support plate and a bottom support plate. A first telescopic member is disposed between the top support plate and the corresponding bottom support plate. The first telescopic member includes a first connecting end connected to the top support plate and a second connecting end connected to the bottom support plate. At least one of the first and second connecting ends is provided with a spherical connector. A spherical cavity is provided on the corresponding top support plate and / or bottom support plate to mate with the spherical connector. A fixing member is provided on the bottom support plate to define the included angle between the first telescopic member and the bottom support plate. A second telescopic member connects two adjacent bottom support plates, and the distance between two adjacent lifting assemblies is adjusted by changing the length of the second telescopic member.

[0006] For example, the triangular area lifting device also includes guide columns, and guide holes are provided in the bottom support plates. The guide columns pass through the guide holes of two adjacent bottom support plates.

[0007] For example, the guide hole extends through the bottom support plate along the width direction of the bottom support plate, and at least one end of the guide post is located outside the guide hole.

[0008] For example, each lifting assembly includes at least two first telescopic members, which are spaced apart along the length of the base support plate.

[0009] For example, the second telescopic member includes a cylinder and a movable rod movable relative to the cylinder, with one of two adjacent bottom support plates connected to the cylinder and the other connected to the movable rod.

[0010] For example, both the first connecting end and the second connecting end are provided with spherical connectors, and both the top support plate and the bottom support plate are provided with spherical cavities. The first connecting end is provided with a first hinge, and the top support plate is provided with a first mating member. The first hinge is hinged to the first mating member. The second connecting end is provided with a second hinge, and the bottom support plate is provided with a second mating member. The second hinge is hinged to the second mating member.

[0011] For example, the fastener includes a support member and a locking member. The locking member is sleeved on the outside of the first telescopic member. One end of the support member is connected to the bottom support plate, and the other end is connected to the locking member. There are at least two support members, which are spaced apart along the circumferential direction of the first telescopic member.

[0012] For example, a flexible washer is sandwiched between the locking member and the first telescopic member.

[0013] For example, the triangular lifting device further includes a protective cover, which includes a first cover connected to a top support plate and a second cover connected to a bottom support plate, with at least a portion of the structure of the first cover inserted into the second cover.

[0014] According to another aspect of the invention, a retraction system is also provided, comprising any of the aforementioned triangular zone lifting devices.

[0015] The triangular zone lifting device provided in this application achieves translational movement of the lifting assembly by adjusting the second telescopic member. This movement method requires less space, allows for a larger top support plate, and ensures the support effect of the triangular zone lifting device. The first telescopic member can adjust the height of the lifting assembly, the spherical connector can adjust the angle of the top support plate and / or the bottom support plate, and the fixing member can limit the adjusted angle. This design allows the triangular zone lifting device to better adapt to different working environments, ensuring the stability and reliability of the support.

[0016] A series of simplified concepts are introduced in the description of the invention, which will be further explained in detail in the detailed description section. This description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to limit the scope of protection of the claimed technical solution.

[0017] The advantages and features of the present invention will be described in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] The following figures are included as part of this invention for understanding its principles. The figures illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention. In the figures, Figure 1 This is a schematic diagram of the structure of a withdrawal system according to an exemplary embodiment of the present invention; Figure 2 A perspective view of a triangular lifting device according to an exemplary embodiment of the present invention; Figure 3 This is an enlarged view of a portion of the structure of a triangular lifting device according to an exemplary embodiment of the present invention; Figure 4 This is an enlarged view of a portion of the structure of a triangular lifting device according to an exemplary embodiment of the present invention.

[0019] The above figures include the following reference numerals: 10. Working face support; 20. Shield support; 30. Goaf; 40. Triangular area lifting device; 41. Lifting assembly; 411. Bottom support plate; 412. Top support plate; 413. First telescopic component; 414. First cover; 415. Second cover; 416. Spherical connector; 417. Locking component; 4171. First arc plate; 4172. Second arc plate; 4173. Third arc plate; 418. Flexible washer; 419. Support component; 421. Guide hole; 422. Guide column; 43. Second telescopic component. Detailed Implementation

[0020] In the following description, numerous details are provided to enable a thorough understanding of the invention. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the invention, and that the invention can be practiced without one or more of these details. Furthermore, to avoid obscuring the invention, some technical features well-known in the art have not been described in detail.

[0021] This invention provides a triangular area lifting device 40. (Referring to reference...) Figure 2 , Figure 3 and Figure 4The triangular zone lifting device 40 includes at least two lifting components 41, each including a top support plate 412 and a bottom support plate 411. The bottom support plate 411 contacts the bottom plate to provide support for the triangular zone lifting device 40. The top support plate 412 contacts the top plate of the triangular zone and supports the top plate. A first telescopic member 413 is provided between the top support plate 412 and the corresponding bottom support plate 411, meaning that the distance between the top support plate 412 and the bottom support plate 411 is adjustable. That is, the height of the triangular zone lifting device 40 itself is adjustable, which can better adapt to the height corresponding to different positions within the triangular zone, so as to better support the top plate.

[0022] The first telescopic member 413 includes a first connecting end connected to the top support plate 412 and a second connecting end connected to the bottom support plate 411. At least one of the first and second connecting ends is provided with a spherical connector 416. The corresponding top support plate 412 and / or bottom support plate 411 are provided with spherical cavities that mate with the spherical connector 416. The spherical connector 416 mates with the spherical cavity, allowing the top support plate 412 and / or bottom support plate 411 to rotate relative to the first telescopic member 413, which can, to a certain extent, allow the triangular lifting device 40 to adapt to changes in the angle of the corresponding top plate and / or bottom plate.

[0023] A fixing member is provided on the bottom support plate 411 to limit the included angle between the first telescopic member 413 and the bottom support plate 411. After the angle between the bottom support plate 411 and the first telescopic member 413 is adjusted, the fixing member is used to fix the angle between the bottom support plate 411 and the first telescopic member 413. A second telescopic member 43 connects two adjacent bottom support plates 411. The distance between two adjacent lifting components 41 is adjusted by changing the length of the second telescopic member 43. That is, by adjusting the length of the second telescopic member 43, the distance between two adjacent bottom support plates 411 can be adjusted, and thus the distance between two adjacent lifting components 41 can be adjusted. It should be noted that there are two lifting components 41 in the figure. In embodiments not shown, there may be three or more lifting components 41.

[0024] Specifically, taking an embodiment with two lifting components 41 as an example, for ease of description, the two lifting components 41 are referred to as the first lifting component and the second lifting component, respectively. When movement is required, the first lifting component supports the top plate, the first telescopic member 413 of the second lifting component retracts, and the top support plate 412 of the second lifting component disengages from the top plate. Then, the length of the second telescopic member 43 is adjusted to move the second lifting component in the target direction. Next, the first telescopic member 413 of the second lifting component is extended, allowing the top support plate 412 of the second lifting component to abut against the top plate and form support; at this point, the second lifting component supports the top plate. The first telescopic member 413 of the first lifting component retracts, causing the top support plate 412 of the first lifting component to disengage from the top plate. The length of the second telescopic member 43 is then adjusted in the opposite direction, moving the first lifting component to the corresponding position. Finally, the first telescopic member 413 of the first lifting component is extended, and the top support plate 412 abuts against the top plate to restore support. By alternating support and movement of the first and second lifting components, the triangular lifting device 40 can move within the triangular area. This translational movement eliminates the need for rotation, meaning no space is required for turning. Therefore, the top support plate 412 can be made larger, significantly increasing the contact area with the top plate and ensuring the support effect.

[0025] The triangular zone lifting device 40 provided in this application achieves the translational movement of the lifting assembly 41 by adjusting the second telescopic member 43. This movement method requires less space, and the size of the top support plate 412 can be larger, ensuring the support effect of the triangular zone lifting device 40. The first telescopic member 413 can adjust the height of the lifting assembly 41, the spherical connector 416 can adjust the angle of the top support plate 412 and / or the bottom support plate 411, and the fixing member can limit the adjusted angle. This configuration of the triangular zone lifting device 40 can better adapt to different working environments, ensuring the stability and reliability of the support.

[0026] For example, refer to Figure 2The triangular lifting device 40 also includes guide posts 422. Guide holes 421 are provided within the base support plates 411, and the guide posts 422 pass through the guide holes 421 of two adjacent base support plates 411. The number of guide holes 421 provided on each base support plate 411 can be set according to actual conditions; it can be one, two, or more. After the guide posts 422 pass through the guide holes 421 of two adjacent base support plates 411, they can limit the relative movement direction of the two adjacent base support plates 411, making the movement path of the base support plates 411 more stable and controllable. The extension direction of the guide holes 421 is the same as the extension direction of the second telescopic member 43. This arrangement can prevent adjacent lifting components 41 from shifting or shaking when the length of the second telescopic member 43 is adjusted, ensuring smooth movement of the lifting components 41. In embodiments where there are at least three lifting components 41, multiple lifting components 41 may be connected to the same first telescopic member 413, or only two adjacent lifting components 41 may be connected to the same first telescopic member 413.

[0027] For example, refer to Figure 2 The guide hole 421 can penetrate the bottom support plate 411 along its width direction, and at least one end of the guide post 422 is located outside the guide hole 421. The through-hole 421 further ensures smooth movement of the guide post 422 and facilitates its installation and removal. The fact that at least one end of the guide post 422 extends outside the guide hole 421 prevents it from becoming completely embedded and difficult to remove or adjust. Taking an embodiment with two lifting components 41 as an example, the length of the guide post 422 is not less than the width of one bottom support plate 411, ensuring that during movement, a portion of the guide post 422 is always exposed on the outside, resulting in better limiting effect. Preferably, the length of the guide post 422 is not less than the sum of the widths of the bottom support plates 411 of all lifting components 41.

[0028] For example, refer to Figure 2Each lifting assembly 41 includes at least two first telescopic members 413, which are spaced apart along the length of the bottom support plate 411. There can be two or more first telescopic members 413. This arrangement allows the first telescopic members 413 to provide multiple supports for the top support plate 412, resulting in a more even distribution of the supporting force on the top support plate 412 and preventing localized deformation or damage due to concentrated force. Multiple supports improve the stability of the top support plate 412, thereby enhancing the support stability of the triangular lifting device 40. When the top support plate 412 is tilted, the heights of the different first telescopic members 413 can vary, further ensuring better support for the top support plate 412 and improving the support effect of the triangular lifting device 40. For example, at least two second telescopic members 43 can be provided. The two second telescopic members 43 can be located on opposite sides of the first telescopic members 413. The second telescopic member 43 is provided on the side of the bottom support plate 411 facing the top support plate 412, which facilitates the movement of the bottom support plate 411.

[0029] For example, refer to Figure 2 The second telescopic component 43 includes a cylinder and a movable rod that is movable relative to the cylinder. One of the two adjacent bottom support plates 411 is connected to the cylinder, and the other is connected to the movable rod. The cylinder provides power for the telescopic movement of the movable rod. By controlling the working state of the cylinder, the movable rod can be extended or retracted, thereby changing the distance between the two adjacent bottom support plates 411. This driving method provides stable operation and reliable response, and can precisely control the distance between adjacent lifting components 41, ensuring accurate position adjustment of the lifting components 41 during alternating support and movement, further improving the smoothness and controllability of the movement process of the triangular lifting device 40.

[0030] For example, in conjunction with reference Figure 2 and Figure 4Both the first and second connecting ends are provided with spherical connectors 416, and both the top support plate 412 and the bottom support plate 411 are provided with spherical cavities. A first hinge is provided on the first connecting end, and a first mating member is provided on the top support plate 412. The first hinge is hinged to the first mating member. A second hinge is provided on the second connecting end, and a second mating member is provided on the bottom support plate 411. The second hinge is hinged to the second mating member. The hinged arrangement of the first hinge with the first mating member and the second hinge with the second mating member further limits the rotation direction and angle of the first telescopic member 413 with the top support plate 412 and the bottom support plate 411, preventing excessive rotation amplitude or uncontrollable direction of the first telescopic member 413. This makes angle adjustment more stable and reliable, ensuring the adaptability of the triangular lifting device 40 to the top and bottom plates, and improving the structural stability during overall support. For example, the rotation axis of the first hinge can be parallel to the telescopic direction of the second telescopic member 43. For example, the pivot of the second hinge can be parallel to the extension and retraction direction of the second telescopic member 43.

[0031] For example, in conjunction with reference Figure 2 and Figure 3The fixing components include support members 419 and locking members 417. Locking members 417 are sleeved on the outside of the first telescopic member 413. One end of the support member 419 is connected to the bottom support plate 411, and the other end is connected to the locking member 417. There are at least two support members 419, spaced apart along the circumferential direction of the first telescopic member 413. The locking member 417 can lock and limit the first telescopic member 413, fixing the angle between the first telescopic member 413 and the bottom support plate 411 with the cooperation of the support members 419. The at least two support members 419 are distributed circumferentially, providing stable support to the locking member 417 from multiple directions, making the locking member 417's limitation on the first telescopic member 413 more secure. This arrangement ensures the stability of the first telescopic member 413 during support, preventing tilting or loosening, and further improving the support reliability of the triangular area lifting device 40. At least two support members 419 are distributed circumferentially, providing stable circumferential support for the first telescopic member 413. When the triangular lifting device 40 is subjected to external impact, the support members 419 and the locking member 417 can deform preferentially, providing cushioning and protection, reducing the possibility of direct damage to the first telescopic member 413, and improving the overall service life and operational stability of the triangular lifting device 40. For example, the locking member 417 may include a first arc-shaped plate 4171, a second arc-shaped plate 4172, and a third arc-shaped plate 4173. The first arc-shaped plate 4171 is hinged to the second arc-shaped plate 4172, and the second arc-shaped plate 4172 is connected to the third arc-shaped plate 4173. The locking member 417 can be openable and closable; after the arc-shaped plate moves to a predetermined position, it can be locked by fasteners. The opening and closing are achieved by the relative rotation of the arc-shaped plates. After closing, the plates are locked by fasteners, so that the locking member 417 composed of arc-shaped plates hugs the first telescopic member 413, thereby fixing the first telescopic member 413.

[0032] For example, in conjunction with reference Figure 2 and Figure 3 A flexible washer 418 is sandwiched between the locking member 417 and the first telescopic member 413. The flexible washer 418 increases the contact area between the locking member 417 and the first telescopic member 413, making the locking force distribution more uniform. At the same time, the flexible washer 418 can buffer the rigid contact between the locking member 417 and the first telescopic member 413, avoiding squeezing damage to the first telescopic member 413 during the locking process. The flexible washer 418 can also play a certain role in shock absorption. Together with the protective structure of the support member 419 and the locking member 417, it further reduces the risk of damage to the first telescopic member 413 and improves the overall durability of the triangular area lifting device 40. For example, the flexible washer 418 can be made of rubber.

[0033] For example, refer to Figure 2The triangular lifting device 40 also includes a protective cover, which comprises a first cover 414 connected to the top support plate 412 and a second cover 415 connected to the bottom support plate 411. At least a portion of the structure of the first cover 414 is inserted into the second cover 415. The insertion arrangement of the first cover 414 and the second cover 415 allows them to extend and retract synchronously with the extension and retraction of the first telescopic member 413, ensuring they always cover the outside of the first telescopic member 413. This arrangement effectively prevents dust, gravel, and other debris from the downhole environment from entering the first telescopic member 413, avoiding interference from debris on the fit between the spherical connector 416 and the spherical cavity, as well as the extension and retraction of the first telescopic member 413 and the second telescopic member 43. This provides protection for the first telescopic member 413 and the second telescopic member 43, extending the service life of the triangular lifting device 40. For example, the first cover 414 may be plate-shaped, and the second cover 415 may be a hollow double-layered plate structure. The top end of the first cover 414 is fixedly connected to the top support plate 412, and the bottom end of the second cover 415 is fixedly connected to the bottom support plate 411. When the first telescopic member 413 extends or retracts, the first cover 414 can move up and down with the top support plate 412, extending or retracting within the second cover 415, forming a sleeve-type telescopic fit. The internal cavity size of the second cover 415 can be larger than the external dimensions of the first cover 414, providing sufficient space for the first cover 414 to move. When the first telescopic member 413 is angled via the spherical connector 416, the first cover 414 can rotate or shift slightly along with the top support plate 412, and always moves within the cavity of the second cover 415 without interfering with it.

[0034] According to another aspect of the invention, a retraction system is also provided. (Referring to...) Figure 1 and Figure 2 The retraction system may include any of the aforementioned triangular area lifting devices 40. The retraction system may also include a working face support 10 and a shield support 20. During operation, the working face support 10, the shield support 20, and the goaf 30 together form a triangular area, within which the triangular area lifting device 40 is located. Since this triangular area lifting device 40 employs the technical solution of any of the above embodiments, the retraction system at least possesses the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0035] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front", "rear", "up", "down", "left", "right", "horizontal", "vertical", "horizontal", "top", and "bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0036] For ease of description, relative terms such as "above," "over," "on the upper surface of," and "above" are used here to describe the regional positional relationship of one or more components or features shown in the figures to other components or features. It should be understood that relative terms include not only the orientation of the component as depicted in the figure but also different orientations during use or operation. For example, if the components in the figures are inverted as a whole, "above" or "above other components or features" will include cases where the component is "below" or "under" other components or features. Thus, the exemplary term "above" can include both "above" and "below." Furthermore, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document intends to include all such cases.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0038] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0039] The present invention has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, those skilled in the art will understand that the present invention is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of the present invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A triangular area lifting device, characterized in that, The system includes at least two lifting components, each of which includes a top support plate and a bottom support plate. A first telescopic member is provided between the top support plate and the corresponding bottom support plate. The first telescopic member includes a first connecting end connected to the top support plate and a second connecting end connected to the bottom support plate. At least one of the first connecting end and the second connecting end is provided with a spherical connector. The corresponding top support plate and / or bottom support plate is provided with a spherical cavity that mates with the spherical connector. A fixing member is provided on the bottom support plate to limit the included angle between the first telescopic member and the bottom support plate. A second telescopic member is connected between two adjacent bottom support plates. The distance between two adjacent lifting components is adjusted by changing the length of the second telescopic member.

2. The triangular area lifting device according to claim 1, characterized in that, The triangular lifting device also includes guide columns, and the bottom support plate is provided with guide holes. The guide columns pass through the guide holes of two adjacent bottom support plates.

3. The triangular area lifting device according to claim 2, characterized in that, The guide hole extends through the bottom support plate along the width direction, and at least one end of the guide post is located outside the guide hole.

4. The triangular area lifting device according to claim 1, characterized in that, Each of the lifting components includes at least two of the first telescopic members, which are spaced apart along the length of the base support plate.

5. The triangular area lifting device according to claim 1, characterized in that, The second telescopic member includes a cylinder and a movable rod that is movable relative to the cylinder. One of the two adjacent bottom support plates is connected to the cylinder, and the other is connected to the movable rod.

6. The triangular area lifting device according to claim 1, characterized in that, Both the first connecting end and the second connecting end are provided with the spherical connector, and both the top support plate and the bottom support plate are provided with the spherical cavity. The first connecting end is provided with a first hinge, and the top support plate is provided with a first mating member. The first hinge is hinged to the first mating member. The second connecting end is provided with a second hinge, and the bottom support plate is provided with a second mating member. The second hinge is hinged to the second mating member.

7. The triangular area lifting device according to any one of claims 1 to 6, characterized in that, The fixing component includes a support component and a locking component. The locking component is sleeved on the outside of the first telescopic component. One end of the support component is connected to the bottom support plate, and the other end is connected to the locking component. There are at least two support components, which are spaced apart along the circumferential direction of the first telescopic component.

8. The triangular area lifting device according to claim 7, characterized in that, A flexible washer is sandwiched between the locking member and the first telescopic member.

9. The triangular area lifting device according to claim 1, characterized in that, The triangular lifting device also includes a protective cover, which includes a first cover connected to the top support plate and a second cover connected to the bottom support plate, with at least a portion of the structure of the first cover inserted into the second cover.

10. A retraction system, characterized in that, Includes the triangular area lifting device as described in any one of claims 1 to 9.

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