Two-row shield support device and working face support withdrawing system

Abstract

This application provides a two-row shield support device and a working face support retraction system, relating to the field of underground coal mining support technology. The two-row shield support device includes: two first supports arranged side-by-side along the width direction of the first supports; a first telescopic component connected at both ends to the two first supports, and telescopically arranged along a first preset direction; and a second telescopic component connected at both ends to the two first supports, and telescopically arranged along a second preset direction, wherein the second preset direction is perpendicular to the first preset direction. The first and second telescopic components drive one of the two first supports to reciprocate relative to the other, ensuring relatively stable and linear movement of the first supports, thus solving the problem of the shield support easily tipping over during forward movement, leading to a time-consuming and labor-intensive retraction process.

Description

Technical Field

[0001] This application relates to the field of underground coal mining support technology, and more specifically, to a two-row shield support device and a working face support retraction system. Background Technology

[0002] With the rapid improvement of mechanization in underground coal mining, some mines have already moved towards informatization and intelligentization. However, the withdrawal of supports in fully mechanized mining faces is still limited by technological constraints.

[0003] Application No. 202310216836.4 discloses a hydraulic support retraction system for fully mechanized mining, including a traction device, several shield supports, and a triangular support frame. The traction device is used to pull the hydraulic supports out along a preset path. The shield supports have raised and lowered states and have a horizontal push rod that extends and retracts along the roadway direction. The horizontal push rod is connected to the traction device. The triangular support frame includes two vertically extendable support columns, which can rotate around the other support column to move forward. The hydraulic supports are arranged in a line along the goaf. On one side of the hydraulic supports, perpendicular to their arrangement direction, the shield supports are also arranged in a line and serve as the power equipment for the hydraulic support retraction. The hydraulic supports, shield supports, and goaf together form a triangular area, the top wall of which is supported by the triangular support frame. After the hydraulic supports are gradually retracted, the triangular support frame and shield supports move forward sequentially, repeating this process to complete the retraction of all hydraulic supports.

[0004] Regarding the aforementioned disclosed technologies, the protective support is prone to tipping over when moving forward, and it is also difficult to maintain a straight line, resulting in a time-consuming and laborious retraction process. Summary of the Invention

[0005] The main objective of this application is to provide a two-column shield support device and a working face support retraction system to solve the problem in the prior art that the retraction process is time-consuming and laborious because the shield support is prone to tipping over when it moves forward.

[0006] To achieve the above objectives, according to one aspect of this application, a two-row cover support device is provided, comprising: two first supports arranged side-by-side along the width direction of the first supports; a first telescopic component connected at both ends to the two first supports, the first telescopic component being telescopically oriented along a first preset direction; and a second telescopic component connected at both ends to the two first supports, the second telescopic component being telescopically oriented along a second preset direction, wherein the second preset direction is perpendicular to the first preset direction; wherein the first telescopic component and the second telescopic component drive one of the two first supports to reciprocate relative to the other.

[0007] Further, the first support includes: a first base plate, a first end of which is connected to a first telescopic component, and a second end of which is connected to a second telescopic component; a third telescopic component, one end of which is connected to a third end of the first base plate, the third telescopic component being telescopically oriented along a third preset direction, wherein the third preset direction is perpendicular to the first preset direction and also perpendicular to the second preset direction; and a first top plate, the other end of which is connected to the third telescopic component; wherein the third telescopic component drives the first top plate to reciprocate relative to the first base plate along the third preset direction.

[0008] Furthermore, the third telescopic component consists of two sets, which are spaced apart along the length of the first support.

[0009] Furthermore, the first support includes a linkage assembly, one end of which is connected to the fourth end of the first base plate, and the other end of which is movably connected to the first top plate.

[0010] Further, the linkage assembly includes: a first linkage connected to the fourth end of the first base plate; a second linkage whose first end is movably connected to the first top plate; a third linkage whose first end is movably connected to the first end of the first linkage, and whose second end is movably connected to the second end of the second linkage; and a fourth linkage whose first end is movably connected to the second end of the first linkage, and whose second end is movably connected to the third end of the second linkage; wherein, the third telescopic assembly drives the second linkage, the third linkage, and the fourth linkage to rotate relative to the first linkage, thereby driving the first top plate to reciprocate relative to the first base plate along a third preset direction.

[0011] Furthermore, the first support includes: a hydraulic pump, the output end of which is connected to the first end of the third telescopic assembly on two adjacent first supports respectively; and a first valve, the two ends of which are connected to the second end of the third telescopic assembly on two adjacent first supports respectively.

[0012] Furthermore, the first support includes a second valve, which is connected in series between the hydraulic pump and the first end of the third telescopic assembly.

[0013] Furthermore, the two-column protective support device includes: a first protective plate, one end of which is connected to the first top plate; and a second protective plate, one end of which is slidably connected to the other end of the first protective plate, and the other end of which is connected to the first bottom plate.

[0014] Furthermore, the first support includes: a fourth telescopic component, the two ends of which are respectively connected to two first top plates, and the fourth telescopic component is telescopically configured along a first preset direction; a sliding shoe, which is connected to the first bottom plate through a fifth telescopic component; and a sliding plate, which is connected to the first top plate through a sixth telescopic component.

[0015] According to another aspect of this application, a working face support retraction system is provided, including two rows of cover support devices, wherein the two rows of cover support devices are the two rows of cover support devices described above.

[0016] By applying the technical solution of this application, the second preset direction is set perpendicular to the first preset direction. The first telescopic component can drive the two first supports to move relative to each other in the first preset direction of the first support, and the second telescopic component can drive the two first supports to move relative to each other in the second preset direction. This achieves both relatively stable movement of the first supports and relatively linear movement of the first supports during the movement process. It solves the problem in the prior art where the cover support is prone to tipping over and is difficult to maintain a straight line when moving forward, resulting in a time-consuming and laborious retraction process. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of a first embodiment of the two-column shield support device according to this application is shown;

[0019] Figure 2 A schematic diagram of a second embodiment of the two-column shield support device according to this application is shown;

[0020] Figure 3 A schematic diagram of a third embodiment of the two-column shield support device according to this application is shown;

[0021] Figure 4 A schematic diagram of the structure of a first embodiment of the linkage assembly according to this application is shown;

[0022] Figure 5 A schematic diagram of a second embodiment of the linkage assembly according to this application is shown;

[0023] Figure 6 A structural schematic diagram of a third embodiment of the linkage assembly according to this application is shown;

[0024] Figure 7 A schematic diagram of an embodiment of the first valve according to this application is shown;

[0025] Figure 8 A schematic diagram of an embodiment of the working face support retraction system according to this application is shown;

[0026] Figure 9 A schematic diagram of the structure of a first embodiment of the triangular zone lifting device according to this application is shown;

[0027] Figure 10 A schematic diagram of a second embodiment of the triangular lifting device according to this application is shown;

[0028] Figure 11 A schematic diagram of the structure of a third embodiment of the triangular zone lifting device according to this application is shown.

[0029] The above figures include the following reference numerals:

[0030] 10. Working surface support;

[0031] 20. Protective support device;

[0032] 21. First support;

[0033] 2100, Sixth telescopic component;

[0034] 211. First base plate; 2110. First valve; 2111. Pipe body; 2112. Ball;

[0035] 212. First roof slab;

[0036] 213. Third telescopic component;

[0037] 22. First telescopic component;

[0038] 23. Second telescopic component;

[0039] 24. Link assembly; 241. First link; 242. Second link; 243. Third link; 244. Fourth link;

[0040] 25. Adapter post;

[0041] 26. Fourth telescopic component;

[0042] 27. Slippery boots;

[0043] 28. Fifth telescopic component;

[0044] 29. Skateboard;

[0045] 30. Goaf;

[0046] 40. Lifting device;

[0047] 41. Second support; 411. Second base plate; 412. Second top plate; 413. Seventh telescopic assembly;

[0048] 417. Fixing clamp; 4171. First arc-shaped plate; 4172. Second arc-shaped plate; 4173. Third arc-shaped plate;

[0049] 418. Washers;

[0050] 42. Guide assembly; 421. Guide hole; 422. Guide rod;

[0051] 43. Eighth telescopic component;

[0052] 51. First protective plate; 52. Second protective plate; 53. Third protective plate; 54. Fourth protective plate;

[0053] 70. Column ball. Detailed Implementation

[0054] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0055] 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, devices, components, and / or combinations thereof.

[0056] It should be noted that the terms "first," "second," etc., 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 terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0057] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0058] Combination Figures 1 to 7 In a specific embodiment of this application, a two-column cover support device is provided.

[0059] Specifically, the two-column cover support device 20 includes a first bracket 21, a first telescopic component 22, and a second telescopic component 23. There are two first brackets 21, which are arranged side by side along the width direction of the first bracket 21. The two ends of the first telescopic component 22 are respectively connected to the two first brackets 21, and the first telescopic component 22 is telescopically arranged along a first preset direction. The two ends of the second telescopic component 23 are respectively connected to the two first brackets 21, and the second telescopic component 23 is telescopically arranged along a second preset direction, wherein the second preset direction is perpendicular to the first preset direction. The first telescopic component 22 and the second telescopic component 23 drive one of the two first brackets 21 to reciprocate relative to the other.

[0060] Combination Figure 1 As shown in the specific embodiment of this application, the second preset direction is set perpendicular to the first preset direction. The first preset direction is the length direction of the first support 21, and the second preset direction is the width direction of the first support 21. The first telescopic component 22 can drive the two first supports 21 to move relative to each other in the length direction of the first support 21, and the second telescopic component 23 can drive the two first supports 21 to move relative to each other in the width direction of the first support 21, thereby enhancing the adaptability and flexibility of the support device. This achieves both relatively stable movement and relatively linear movement of the first support 21 during the movement process, solving the problem in the prior art where the cover support is prone to tipping over and difficult to maintain a straight line when moving forward, resulting in a time-consuming and laborious retraction process.

[0061] Further, the first support 21 includes a first base plate 211, a first top plate 212, and a third telescopic component 213. The first end of the first base plate 211 is connected to the first telescopic component 22, and the second end of the first base plate 211 is connected to the second telescopic component 23. One end of the third telescopic component 213 is connected to the third end of the first base plate 211. The third telescopic component 213 is telescopically arranged along a third preset direction, wherein the third preset direction is perpendicular to the first preset direction and perpendicular to the second preset direction. The other end of the first top plate 212 is connected to the third telescopic component 213. The third telescopic component 213 drives the first top plate 212 to reciprocate relative to the first base plate 211 along the third preset direction.

[0062] Combination Figure 2 and Figure 3 As shown, the first support 21, through the combination of the first base plate 211, the first top plate 212, and the third telescopic component 213, can not only achieve telescopic adjustment in the horizontal direction but also height adjustment in the vertical direction. This forms a support structure that can be flexibly adjusted in three-dimensional space, allowing the support device to adapt more flexibly to changes in the top of the working face, providing more stable support, and ensuring that the vertical distance between the top and bottom plates is adjustable to adapt to working face conditions at different heights. This improves the adaptability and stability of the support device and has a significant effect on enhancing safety during the retraction of supports in underground coal mining faces.

[0063] Furthermore, the third telescopic component 213 consists of two sets, which are spaced apart along the length of the first support 21. This arrangement helps to improve the rigidity and stability of the overall structure, ensuring the stability and safety of the support device even under complex working conditions and uneven geological structures.

[0064] See Figures 1 to 3In one specific embodiment of this application, the third telescopic component 213 is provided with a column ball 70 at both its upper and lower ends. The first end face of the column ball 70 is connected to the third telescopic component 213, and the second end face of the column ball 70 is spherical. A recess, a spherical groove, is provided on either the first top plate 212 or the first bottom plate 211, and the shape of the recess is configured to match the second end face of the column ball 70. Further, the first support 21 includes a connecting rod assembly 24. One end of the connecting rod assembly 24 is connected to the fourth end of the first bottom plate 211, and the other end of the connecting rod assembly 24 is movably connected to the first top plate 212. When the third telescopic component 213 performs telescopic movements, the smooth telescopic movement of the third telescopic component is achieved through the cooperation of the column ball 70 and the recess. Simultaneously, the rotational capability of the column ball allows for slight angular adjustments of the first top plate 212 relative to the first bottom plate 211 during the telescopic process, adapting to irregular changes in the top of the working surface. This configuration improves the smoothness of the movement of the third telescopic component 213 and reduces wear and failure rate during operation.

[0065] Combination Figure 2 and Figure 3 As shown, in this embodiment, the first base plate 211 and the first top plate 212 are connected by the connecting rod assembly 24, which ensures that the first top plate 212 can be adjusted vertically stably and flexibly, thereby improving the support effect and stability of the entire two-column cover support device.

[0066] Furthermore, the linkage assembly 24 includes a first linkage 241, a second linkage 242, a third linkage 243, and a fourth linkage 244. The first linkage 241 is connected to the fourth end of the first base plate 211; the first end of the second linkage 242 is movably connected to the first top plate 212; the first end of the third linkage 243 is movably connected to the first end of the first linkage 241, and the second end of the third linkage 243 is movably connected to the second end of the second linkage 242; the first end of the fourth linkage 244 is movably connected to the second end of the first linkage 241, and the second end of the fourth linkage 244 is movably connected to the third end of the second linkage 242. The third telescopic assembly 213 drives the second linkage 242, the third linkage 243, and the fourth linkage 244 to rotate relative to the first linkage 241, thereby causing the first top plate 212 to reciprocate relative to the first base plate 211 along a third preset direction.

[0067] Combination Figures 3 to 6As shown, when the third telescopic component 213 extends or retracts, it pushes or pulls the second link 242. Since the second link 242 is connected to the third link 243 and the fourth link 244 through movable connections, this movement is transmitted throughout the entire link assembly. The interaction between the links causes the first top plate 212 to reciprocate relative to the first bottom plate 211 along a third preset direction (i.e., the vertical direction), thereby adjusting the vertical support height. This arrangement ensures that the vertical movement of the first top plate 212 is smooth and stable under the drive of the third telescopic component 213, enhancing the adjustability and adaptability of the entire two-row shield support device, which is of great significance for improving the safety and efficiency in coal mining. Figure 4 This is a schematic diagram of the linkage assembly 24 in the extended state. Figure 5 A schematic diagram showing the linkage assembly 24 in its intermediate state. Figure 6 This is a schematic diagram of the linkage assembly 24 in a folded state.

[0068] In one specific embodiment of this application, the length of the first link 241 is 841 mm, the length of the second link 242 is 1900 mm, the length from the first end to the third end of the second link 242 is 1420 mm, the length from the second end to the third end of the second link 242 is 480 mm, the length of the third link 243 is 1170 mm, and the length of the fourth link 244 is 1450 mm. The link assembly 24 is in an extended state (combined with...). Figure 4 When (as shown), the height of the link assembly 24 is 2960mm, and the link assembly 24 is in the intermediate state (in conjunction with...). Figure 5 When (as shown), the height of the linkage assembly 24 is 2565mm, and the linkage assembly 24 is in a folded state (in conjunction with...). Figure 6 As shown, the height of the connecting rod assembly 24 is 960mm. This setting allows the two rows of shield support devices to be adjusted to multiple heights, enabling operation under various working conditions.

[0069] Furthermore, the first support 21 includes a hydraulic pump and a first valve 2110. The output end of the hydraulic pump is connected to the first end of the third telescopic component 213 on the two adjacent first supports 21, respectively; the two ends of the first valve 2110 are connected to the second ends of the third telescopic component 213 on the two adjacent first supports 21, respectively. Through precise control of the first valve 2110, the telescopic speed of the third telescopic component 213 can be adjusted, avoiding structural impact that may be caused by rapid telescopic movement. At the same time, the telescopic amount of the telescopic component can be finely adjusted according to the actual situation of the working surface, ensuring the stability and adaptability of the support device.

[0070] Combination Figure 7As shown, in this embodiment, the first valve 2110 includes a pipe body 2111 and a ball 2112. The inner cavity of the pipe body 2111 is smaller at both ends and larger in the middle. The two ends of the pipe body 2111 are respectively connected to the oil ports at the lower part of the two third telescopic components 213. The ball 2112 is built into the pipe body 2111. The diameter of the ball 2112 is smaller than the diameter of the inner cavity in the middle part of the pipe body 2111, and the diameter of the ball 2112 is larger than the diameter of the inner cavity at both ends of the pipe body 2111. The pipe body 2111 is preferably U-shaped, and the density of the ball 2112 is preferably greater than the density of the oil in the third telescopic component 213. When the oil pressure difference between the two third telescopic components 213 is less than or equal to the first threshold, the first valve 2110 is in the open state, and when the oil pressure difference between the two third telescopic components 213 is greater than the first threshold, the first valve 2110 is in the closed state. Compared with the case where the two third telescopic components 213 are connected in series with the hydraulic pump, it can alleviate the vibration, instability and cylinder drop caused by uneven oil pressure flow in the third telescopic component 213.

[0071] Furthermore, the first support 21 includes a second valve, which is connected in series between the hydraulic pump and the first end of the third telescopic assembly 213. This arrangement enables secondary regulation of the hydraulic oil output by the hydraulic pump, ensuring smooth operation of the telescopic movement of the third telescopic assembly. The second valve is a conventional valve, such as a solenoid valve or a gate valve.

[0072] Furthermore, the two rows of protective support devices include a first protective plate 51 and a second protective plate 52. One end of the first protective plate 51 is connected to the first top plate 212; one end of the second protective plate 52 is slidably connected to the other end of the first protective plate 51, and the other end of the second protective plate 52 is connected to the first bottom plate 211. When the two rows of protective support devices are in operation, the first protective plate 51 and the second protective plate 52 can be adjusted in length and width according to the actual width of the working face. Through the fixed connection between the first protective plate 51 and the first top plate 212, and the sliding connection between the second protective plate 52 and the first protective plate 51, a dynamically adjustable protective area is formed, providing comprehensive coverage and protection for the working face. The combined use of the first protective plate 51 and the second protective plate 52 not only increases the protective area during the retraction of the working face support and improves safety, but also enables the two rows of protective support devices to adapt to working faces of different widths, enhancing their application flexibility and adaptability.

[0073] Furthermore, the first support 21 includes a fourth telescopic component 26, a sliding shoe 27, a fifth telescopic component 28, and a sliding plate 29. The two ends of the fourth telescopic component 26 are respectively connected to two first top plates 212, and the fourth telescopic component 26 is telescopically oriented along a first preset direction. The sliding shoe 27 is connected to the first bottom plate 211 via the fifth telescopic component 28. The sliding plate 29 is connected to the first top plate 212 via a sixth telescopic component 2100. Through the telescopic movement of the fourth telescopic component 26, the first top plate 212 can extend and retract horizontally to adapt to working surfaces of different widths, providing more stable and comprehensive top support. The telescopic movement of the fifth telescopic component 28 can adjust the contact height between the sliding shoe 27 and the ground, ensuring that the sliding shoe 27 maintains optimal contact under different ground conditions, thus improving the stability of the equipment.

[0074] In another embodiment of this application, the first bracket 21 includes a transition post 25, the first end of the transition post 25 is rotatably connected to the first top plate 212, and the second end of the transition post 25 is hinged to the fourth telescopic component 26. A transition post 25 is provided on each of the two first top plates 212, and the two transition posts 25 are respectively hinged to the two ends of the fourth telescopic component 26.

[0075] In one embodiment of this application, the fourth telescopic component 26 is in two sets, and the first top plate 212 of the two sets of fourth telescopic components 26 are arranged at intervals along the length direction.

[0076] In one embodiment of this application, the fourth telescopic component 26 is in two sets, and the two sets of fourth telescopic components 26 are arranged at intervals along the length direction of the first base plate 211.

[0077] In another embodiment of this application, a working face support retraction system is also provided, including two rows of cover support devices 20, which are the two rows of cover support devices 20 in the above embodiment.

[0078] Specifically, the working face support retraction system also includes the working face support 10 and the triangular area lifting device 40, such as... Figure 8 The diagram shows the positional relationship between the working face support 10, the two rows of shield support devices 20, and the goaf 30, as well as the triangular area formed by the working face support 10, the two rows of shield support devices 20, and the goaf 30. The triangular area lifting device 40 described below is used for supporting the triangular area.

[0079] The working process of the working face support retraction system is as follows: The triangular area lifting device 40, the working face support 10, and the two rows of protective support devices 20 are all in a supported state. The working face support 10 to be retracted is pulled out using a winch. The triangular area lifting device 40 and the two rows of protective support devices 20 advance sequentially, and then the process repeats. The two first supports 21 of the two rows of protective support devices 20 advance alternately, enabling the protective support to move autonomously.

[0080] See Figure 9 This invention provides a triangular area lifting device 40, including a second bracket 41, a guide assembly 42, and an eighth telescopic assembly 43. There are two second brackets 41, each including a second base plate 411. The two second base plates 411 are connected by the guide assembly 42. Under the constraint of the guide assembly 42, either second base plate 411 moves linearly relative to the other second base plate 411. The two second base plates 411 are connected by the eighth telescopic assembly 43. The eighth telescopic assembly 43 is telescopically arranged along the width direction of the second base plate 411. Under the action of the eighth telescopic assembly 43, the two second base plates 411 move closer or further apart.

[0081] In a preferred embodiment of this application, two second base plates 411 are arranged side by side along the width direction of the second base plates 411, and the two second base plates 411 are respectively hinged to both ends of the eighth telescopic assembly 43. There are two eighth telescopic assemblies 43, which are spaced apart along the length direction of the second base plates 411. There are two sets of guide assemblies 42, which are spaced apart along the length direction of the second base plates 411. Under the action of the eighth telescopic assembly 43, the two second supports 41 move forward in a straight line along the guide assembly 42. Compared with the rotating support columns in the prior art, the present application does not need to reduce the size to ensure the rotation space, thus ensuring that the contact area between the second support 41 and the top plate of the triangular area can be maximized.

[0082] Combination Figure 9 As shown, in this embodiment, the guide assembly 42 includes a guide hole 421 penetrating the second base plate 411 and a guide rod 422 passing through the guide hole 421.

[0083] Furthermore, the second support 41 includes a second top plate 412 and a seventh telescopic component 413. The first end of the seventh telescopic component 413 is connected to the second bottom plate 411, and the second end of the seventh telescopic component 413 is connected to the second bottom plate 411. The seventh telescopic component 413 is telescopically arranged along the thickness direction of the second bottom plate 411. There are two sets of the seventh telescopic component 413, and the two sets of the seventh telescopic component 413 are spaced apart along the length direction of the second bottom plate 411.

[0084] Furthermore, the upper end of the third guard plate 53 is connected to the second top plate 412, the lower end of the third guard plate 53 is slidably connected to the upper end of the fourth guard plate 54, and the lower end of the fourth guard plate 54 is connected to the second bottom plate 411.

[0085] Combination Figure 11 As shown, each end of the seventh telescopic component 413 is provided with a column ball 70. The first end face of the column ball 70 is connected to the seventh telescopic component 413, and the second end face of the column ball 70 is a spherical surface. A column socket is provided on the second top plate 412 or the second bottom plate 411. The column socket is a spherical groove, and the shape of the column socket matches the second end face of the column ball 70.

[0086] Combination Figure 11 As shown, the first end of the seventh telescopic component 413 is hinged to the second top plate 412, and the second end of the seventh telescopic component 413 is hinged to the second bottom plate 411.

[0087] Preferably, the seventh telescopic component 413 has pin holes at both its upper and lower ends. A pin passes through these pin holes and connects to the second top plate 412 or the second bottom plate 411. The center of the pin hole coincides with the center of the socket. The axis of the pin is parallel to the length direction of the second top plate 412 or the second bottom plate 411. It is preferable that the inner diameter of the pin hole is larger than the outer diameter of the pin. By using the connection method of the ball 70 and the socket, the force direction of the seventh telescopic component 413 is approximately along its axis, resulting in high support strength.

[0088] Combination Figure 10 As shown, the seventh telescopic component 413 includes a fixed end and a telescopic end. The fixed end of the seventh telescopic component 413 is connected to the second base plate 411 through a fixing clip 417. A washer 418 is provided between the inner wall of the fixing clip 417 and the outer wall of the fixed end of the seventh telescopic component 413. The washer 418 is made of an elastic material.

[0089] Combination Figure 10 As shown, there are two fixing clips 417. The first end of each fixing clip 417 is connected to the second base plate 411, and the second ends of the two fixing clips 417 are connected to each other.

[0090] For example, there are two fixing clips 417, which are hinged to the second base plate 411. The two fixing clips 417 are connected together and together with the second base plate 411 form a circular inner wall. The fixing end of the seventh telescopic component 413 is columnar, and the outer diameter of the fixing end of the seventh telescopic component 413 is equal to the inner diameter of the washer 418. The outer diameter of the washer 418 is equal to the inner diameter of the fixing clip 417. Alternatively, the fixing clip 417 is rotatably connected to the second base plate 411. If the second top plate 412 is tilted, the washer 418 deforms, and the seventh telescopic component 413 and the fixing clip 417 rotate slightly relative to each other for fine adjustment. This helps to adjust the force direction of the seventh telescopic component 413 along its axial direction, thereby improving the support strength.

[0091] Combination Figure 10 As shown, the fixing clamp 417 includes a first arc-shaped plate 4171, a second arc-shaped plate 4172, and a third arc-shaped plate 4173 connected end to end. The first arc-shaped plate 4171 and the second arc-shaped plate 4172 are hinged together, and the second arc-shaped plate 4172 and the third arc-shaped plate 4173 are fixedly connected. There are two second arc-shaped plates 4172, which are arranged parallel to each other between the first arc-shaped plate 4171 and the third arc-shaped plate 4173.

[0092] It should be noted that the first telescopic component 22, the second telescopic component 23, the third telescopic component 213, the fourth telescopic component 26, the fifth telescopic component 28, the sixth telescopic component 2100, the seventh telescopic component 413, and the eighth telescopic component 43 may be the same or different. In a specific embodiment of this application, each telescopic component includes at least one telescopic rod, which can be driven by a cylinder or a motor.

[0093] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0094] The first telescopic component 22 can drive the two first supports 21 to move relative to each other along the length of the first supports 21, and the second telescopic component 23 can drive the two first supports 21 to move relative to each other along the width of the first supports 21, thus enhancing the adaptability and flexibility of the support device. This achieves both relatively stable movement and relatively linear movement of the first supports 21 during the movement process, solving the problem in the prior art where the protective supports are prone to tipping over and have difficulty maintaining a straight line of movement when moving forward, resulting in a time-consuming and laborious retraction process.

[0095] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0096] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this application.

[0097] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0098] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A two-row shield support device, characterized in that, include: The first support, there are two first supports, and the two first supports are arranged side by side along the width direction of the first support; A first telescopic component, the two ends of which are respectively connected to the two first brackets, and the first telescopic component is telescopically oriented along a first preset direction; The second telescopic component has two ends connected to the two first brackets respectively. The second telescopic component is telescopically arranged along a second preset direction, wherein the second preset direction is perpendicular to the first preset direction. The first telescopic component and the second telescopic component drive one of the two first brackets to reciprocate relative to the other. The first support includes: A first base plate, the first end of which is connected to the first telescopic component, and the second end of which is connected to the second telescopic component; A third telescopic component, one end of which is connected to the third end of the first base plate, is telescopically arranged along a third preset direction, wherein the third preset direction is perpendicular to the first preset direction and the third preset direction is perpendicular to the second preset direction; A first top plate, which is connected to the other end of the third telescopic assembly; The third telescopic component drives the first top plate to reciprocate relative to the first bottom plate along the third preset direction; A hydraulic pump, the output end of which is respectively connected to the first end of the third telescopic assembly on two adjacent first brackets; A first valve, the two ends of which are respectively connected to the second ends of the third telescopic components on two adjacent first supports; A second valve is connected in series between the hydraulic pump and the first end of the third telescopic assembly; The first valve includes a pipe body and a ball. The inner cavity of the pipe body is smaller at both ends and larger in the middle. The two ends of the pipe body are respectively connected to the oil ports at the lower part of the two third telescopic components. The ball is placed inside the pipe body. The diameter of the ball is smaller than the diameter of the inner cavity in the middle part of the pipe body, and the diameter of the ball is larger than the diameter of the inner cavity at both ends of the pipe body. When the oil pressure difference between the two third telescopic components is less than or equal to a first threshold, the first valve is in the open state. When the oil pressure difference between the two third telescopic components is greater than the first threshold, the first valve is in the closed state.

2. The two-column shield support device according to claim 1, characterized in that, The third telescopic component consists of two sets, which are spaced apart along the length of the first bracket.

3. The two-column shield support device according to claim 1 or 2, characterized in that, The first support includes a linkage assembly, one end of which is connected to the fourth end of the first base plate, and the other end of which is movably connected to the first top plate.

4. The two-column cover support device according to claim 3, characterized in that, The linkage assembly includes: The first link is connected to the fourth end of the first base plate; The second link, the first end of which is movably connected to the first top plate; The third link, wherein the first end of the third link is movably connected to the first end of the first link, and the second end of the third link is movably connected to the second end of the second link; The fourth link, wherein the first end of the fourth link is movably connected to the second end of the first link, and the second end of the fourth link is movably connected to the third end of the second link; The third telescopic component drives the second link, the third link, and the fourth link to rotate relative to the first link, thereby causing the first top plate to reciprocate relative to the first bottom plate along the third preset direction.

5. The two-column shield support device according to claim 1 or 2, characterized in that, The two rows of protective support devices include: The first protective plate, one end of which is connected to the first top plate; The second protective plate has one end slidably connected to the other end of the first protective plate, and the other end of the second protective plate is connected to the first base plate.

6. The two-column shield support device according to claim 1 or 2, characterized in that, The first support includes: The fourth telescopic component is connected at both ends to the two first top plates respectively, and the fourth telescopic component is telescopically arranged along the first preset direction; A sliding shoe, which is connected to the first base plate via a fifth telescopic component (28); A skateboard, which is connected to the first top plate via a sixth telescopic component.

7. A working face support retraction system, comprising two rows of protective support devices, characterized in that, The two-row cover support device is the two-row cover support device according to any one of claims 1 to 6.

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