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

Abstract

The invention provides a two-row shield supporting device and a working face support withdrawing system, and relates to the technical field of coal mine underground mining timber.The two-row shield supporting device comprises two first supports, two second supports, a plurality of shield supporting devices, a plurality of shield supporting devices and a plurality of shield supporting devices, and the two first supports are arranged side by side in the width direction of the first supports; the two ends of the first telescopic assembly are connected with the two first supports correspondingly, and the first telescopic assembly is arranged in a telescopic mode in the first preset direction; the two ends of the second telescopic assembly are connected with the two first supports correspondingly, the second telescopic assembly is arranged in a telescopic mode in the second preset direction, and the second preset direction is perpendicular to the first preset direction; the first telescopic assembly and the second telescopic assembly drive one of the two first supports to reciprocate relative to the other first support, relative stable movement and relative linear movement of the first supports are guaranteed, and the problem that time and labor are wasted in the withdrawing process due to the fact that the shield support is prone to toppling when moving forwards is solved.

Description

Technical Field

[0001] The present application relates to the technical field of underground coal mining support, and in particular to a two-row shielding support device and a working face support withdrawal system. Background Art

[0002] With the rapid improvement of the mechanization level of underground coal mining, some mines have moved towards informatization and intelligence. However, the withdrawal of the support of the fully mechanized mining face is restricted by the technical level and still has certain limitations.

[0003] The related technology of application number 202310216836.4 discloses a comprehensive mining hydraulic support withdrawal system, including a traction device, a plurality of shielding supports and a triangular area support frame, the traction device is used to pull the hydraulic support out of the frame along a preset path, the shielding support has a lifting state and a lowering state, the shielding support has a flat push rod that can be extended along the direction of the tunnel, the flat push rod is connected to the traction device, and the triangular area support frame includes two support columns that can be extended in the vertical direction, and the support column can rotate around the other support column to move forward. Among them, the hydraulic supports are arranged in a line along the goaf, and on one side of the hydraulic supports, perpendicular to the arrangement direction of the hydraulic supports, the shielding supports are arranged in a line, and the shielding supports are also used as power equipment for the withdrawal of the hydraulic supports. The hydraulic supports, shielding supports and goafs together form a triangular area, and the top wall of the triangular area is supported by the triangular area support frame. After the hydraulic supports are gradually withdrawn, the triangular area support frame and the shielding supports move forward one by one, and this is repeated to complete the withdrawal of all hydraulic supports.

[0004] With respect to the above-disclosed related technologies, when the shielding bracket moves forward, it is not only easy to topple over, but also difficult to keep moving forward in a straight line, resulting in a time-consuming and laborious retraction process. Summary of the invention

[0005] The main purpose of the present application is to provide a two-row shield support device and a work surface support retraction system to solve the problem in the prior art that the retraction process is time-consuming and labor-intensive because the shield support is easy to tip over when moving forward.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a two-row shielding support device is provided, including: a first bracket, two first brackets, and the two first brackets are arranged side by side along the width direction of the first bracket; a first telescopic assembly, the two ends of the first telescopic assembly are respectively connected to the two first brackets, and the first telescopic assembly is telescopically arranged along a first preset direction; a second telescopic assembly, the two ends of the second telescopic assembly are respectively connected to the two first brackets, and the second telescopic assembly is telescopically arranged along a second preset direction, wherein the second preset direction is perpendicular to the first preset direction; wherein the first telescopic assembly and the second telescopic assembly drive one of the two first brackets to perform reciprocating motion relative to the other.

[0007] Further, the first bracket includes: a first base plate, a first end of the first base plate is connected to the first telescopic assembly, and a second end of the first base plate is connected to the second telescopic assembly; a third telescopic assembly, one end of the third telescopic assembly is connected to the third end of the first base plate, and the third telescopic assembly 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, the first top plate is connected to the other end of the third telescopic assembly; wherein the third telescopic assembly drives the first top plate to reciprocate relative to the first base plate along the third preset direction.

[0008] Furthermore, there are two groups of third telescopic components, and the two groups of third telescopic components are arranged at intervals along the length direction of the first bracket.

[0009] Furthermore, the first bracket includes a connecting rod assembly, one end of the connecting rod assembly is connected to the fourth end of the first bottom plate, and the other end of the connecting rod assembly is movably connected to the first top plate.

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

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

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

[0013] Furthermore, the two rows of shielding support devices include: a first guard plate, one end of which is connected to the first top plate; a second guard plate, one end of which is slidably connected to the other end of the first guard plate, and the other end of the second guard plate is connected to the first bottom plate.

[0014] Furthermore, the first bracket includes: a fourth telescopic component, both ends of which are respectively connected to the two first top plates, and the fourth telescopic component is telescopically arranged along the 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 the present application, a working surface support retraction system is provided, comprising two rows of shielding support devices, and the two rows of shielding support devices are the two rows of shielding support devices mentioned above.

[0016] By applying the technical solution of the present application, the second preset direction is set perpendicular to the first preset direction, the first telescopic component can drive the two first brackets to make relative movement in the first preset direction of the first bracket, and the second telescopic component can drive the two first brackets to make relative movement in the second preset direction, thereby ensuring that during the movement, both the relatively stable movement of the first bracket and the relatively linear movement of the first bracket are guaranteed, thereby solving the problem in the prior art that the shielding bracket is not only prone to tipping over when moving forward, but also difficult to maintain a straight line, resulting in a time-consuming and labor-intensive withdrawal process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

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

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

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

[0021] Figure 4 A schematic structural diagram of a first embodiment of a connecting rod assembly according to the present application is shown;

[0022] Figure 5 A structural schematic diagram of a second embodiment of a connecting rod assembly according to the present application is shown;

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

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

[0025] Figure 8 A structural schematic diagram of an embodiment of a working surface support retraction system according to the present application is shown;

[0026] Fig. 9 A schematic structural diagram of a first embodiment of a triangular area lifting device according to the present application is shown;

[0027] Fig.10 A schematic structural diagram of a second embodiment of a triangular area lifting device according to the present application is shown;

[0028] Fig.11 A structural schematic diagram of a third embodiment of the triangular area lifting device according to the present application is shown.

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

[0030] 10. Working surface support;

[0031] 20. Protective support device;

[0032] 21. The first bracket;

[0033] 2100, sixth telescopic assembly;

[0034] 211, first bottom plate; 2110, first valve; 2111, tube body; 2112, ball body;

[0035] 212, first top plate;

[0036] 213, third telescopic assembly;

[0037] 22. A first telescopic assembly;

[0038] 23. A second telescopic assembly;

[0039] 24, connecting rod assembly; 241, first connecting rod; 242, second connecting rod; 243, third connecting rod; 244, fourth connecting rod;

[0040] 25. Adapter column;

[0041] 26. Fourth telescopic component;

[0042] 27. Slip boots;

[0043] 28. The fifth telescopic component;

[0044] 29. Skateboard;

[0045] 30. Goaf;

[0046] 40. Lifting device;

[0047] 41. second bracket; 411. second bottom plate; 412. second top plate; 413. seventh telescopic assembly;

[0048] 417, fixing clip; 4171, first arc-shaped plate; 4172, second arc-shaped plate; 4173, third arc-shaped plate;

[0049] 418, gasket;

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

[0051] 43. Eighth telescopic component;

[0052] 51, first guard plate; 52, second guard plate; 53, third guard plate; 54, fourth guard plate;

[0053] 70. Pillar ball. DETAILED DESCRIPTION

[0054] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0055] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates 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 and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0057] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0058] Combination Figures 1 to 7 In a specific embodiment of the present application, a two-row shielding support device is provided.

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

[0060] Combination Figure 1 As shown, in a specific embodiment of the present application, the second preset direction is set perpendicular to the first preset direction, the first preset direction is the length direction of the first bracket 21, and the second preset direction is the width direction of the first bracket 21. The first telescopic assembly 22 can drive the two first brackets 21 to make relative movements in the length direction of the first bracket 21, and the second telescopic assembly 23 can drive the two first brackets 21 to make relative movements in the width direction of the first bracket 21, thereby enhancing the adaptability and flexibility of the support device. During the movement, both the relatively stable movement of the first bracket 21 and the relatively linear movement of the first bracket 21 are ensured, thereby solving the problem in the prior art that the shielding bracket is not only prone to tipping over when moving forward, but also difficult to maintain a straight line forward, resulting in a time-consuming and laborious withdrawal process.

[0061] Further, the first bracket 21 includes a first bottom plate 211, a first top plate 212 and a third telescopic assembly 213, wherein the first end of the first bottom plate 211 is connected to the first telescopic assembly 22, and the second end of the first bottom plate 211 is connected to the second telescopic assembly 23; one end of the third telescopic assembly 213 is connected to the third end of the first bottom plate 211, and the third telescopic assembly 213 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; the first top plate 212 is connected to the other end of the third telescopic assembly 213; wherein the third telescopic assembly 213 drives the first top plate 212 to reciprocate relative to the first bottom plate 211 along the third preset direction.

[0062] Combination Figure 2 and Figure 3 As shown, the first bracket 21 can not only realize telescopic adjustment in the horizontal direction, but also adjust the height in the vertical direction through the combination of the first bottom plate 211, the first top plate 212 and the third telescopic assembly 213, thereby forming a support structure that can be flexibly adjusted in three-dimensional space, so that the support device can more flexibly adapt to the top changes of the working surface, provide more stable support, and ensure that the vertical distance between the top plate and the bottom plate is adjustable to adapt to working surface conditions at different heights. The adaptability and stability of the support device are improved, which has a significant effect on improving the safety of the support withdrawal process in the underground mining working surface of the coal mine.

[0063] Furthermore, the third telescopic components 213 are divided into two groups, and the two groups of third telescopic components 213 are arranged at intervals along the length direction of the first bracket 21. Such an arrangement helps to improve the rigidity and stability of the overall structure, and ensures the stability and safety of the support device even when the working surface conditions are complex and the geological structure is uneven.

[0064] See also Figures 1 to 3In a specific embodiment of the present application, a column ball 70 is provided at the upper end and the lower end of the third telescopic assembly 213, the first end surface of the column ball 70 is connected to the third telescopic assembly 213, the second end surface of the column ball 70 is a spherical surface, and a column socket is provided on the first top plate 212 or the first bottom plate 211, the column socket is a spherical groove, and the shape of the column socket is arranged to match the second end surface of the column ball 70. Further, the first bracket 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 assembly 213 performs a telescopic action, the smooth telescopic movement of the third telescopic assembly is achieved through the cooperation of the column ball 70 and the column socket, and the rotation ability of the column ball allows the first top plate 212 to have a slight angle adjustment relative to the first bottom plate 211 during the telescopic process to adapt to the irregular changes on the top of the working surface. This arrangement improves the smoothness of the movement of the third telescopic assembly 213 and reduces the wear and failure rate of the equipment during operation.

[0065] Combination Figure 2 and Figure 3 As shown, in this embodiment, the first bottom plate 211 and the first top plate 212 are connected by a connecting rod assembly 24, ensuring that the first top plate 212 can be stably and flexibly adjusted in the vertical direction, thereby improving the supporting effect and stability of the entire two-row shielding support device.

[0066] Further, the connecting rod assembly 24 includes a first connecting rod 241, a second connecting rod 242, a third connecting rod 243 and a fourth connecting rod 244, the first connecting rod 241 is connected to the fourth end of the first bottom plate 211; the first end of the second connecting rod 242 is movably connected to the first top plate 212; the first end of the third connecting rod 243 is movably connected to the first end of the first connecting rod 241, and the second end of the third connecting rod 243 is movably connected to the second end of the second connecting rod 242; the first end of the fourth connecting rod 244 is movably connected to the second end of the first connecting rod 241, and the second end of the fourth connecting rod 244 is movably connected to the third end of the second connecting rod 242; wherein the third telescopic assembly 213 drives the second connecting rod 242, the third connecting rod 243, and the fourth connecting rod 244 to rotate relative to the first connecting rod 241, thereby driving the first top plate 212 to reciprocate relative to the first bottom plate 211 along a third preset direction.

[0067] Combination Figures 3 to 6As shown, when the third telescopic assembly 213 is extended or retracted, it pushes or pulls the second connecting rod 242. Since the second connecting rod 242 is connected to the third connecting rod 243 and the fourth connecting rod 244 through a movable connection, this movement will be transmitted to the entire connecting rod assembly. The interaction between the connecting rods will cause the first top plate 212 to reciprocate along the third preset direction (i.e., the vertical direction) relative to the first bottom plate 211, thereby adjusting the vertical support height. This arrangement ensures that under the drive of the third telescopic assembly 213, the vertical movement of the first top plate 212 is both smooth and stable, which enhances the adjustment ability and adaptability of the entire two-row shielding support device, which is of great significance for improving the safety and efficiency of coal mining. Figure 4 is a schematic diagram of the connecting rod assembly 24 in an extended state, Figure 5 is a schematic diagram of the connecting rod assembly 24 in an intermediate state, Figure 6 It is a schematic diagram of the connecting rod assembly 24 in a folded state.

[0068] In a specific embodiment of the present application, the length of the first connecting rod 241 is 841 mm, the length of the second connecting rod 242 is 1900 mm, the length from the first end to the third end of the second connecting rod 242 is 1420 mm, the length from the second end to the third end of the second connecting rod 242 is 480 mm, the length of the third connecting rod 243 is 1170 mm, and the length of the fourth connecting rod 244 is 1450 mm. The connecting rod assembly 24 is in an extended state (combined with Figure 4 As shown), the height of the connecting rod assembly 24 is 2960 mm, and the connecting rod assembly 24 is in the middle state (combined Figure 5 As shown), the height of the connecting rod assembly 24 is 2565mm, and the connecting rod assembly 24 is in the folded state (combined with Figure 6 As shown), the height of the connecting rod assembly 24 is 960 mm. This arrangement allows the two rows of shielding support devices to be adjusted at multiple heights to achieve operations under various working conditions.

[0069] Furthermore, the first bracket 21 includes a hydraulic pump and a first valve 2110, the output end of the hydraulic pump is respectively connected to the first ends of the third telescopic components 213 on two adjacent first brackets 21; the two ends of the first valve 2110 are respectively connected to the second ends of the third telescopic components 213 on two adjacent first brackets 21. Through the precise control of the first valve 2110, the telescopic speed of the third telescopic component 213 can be adjusted to avoid the structural impact caused by rapid telescopic expansion and contraction. At the same time, the telescopic amount of the telescopic component can be fine-tuned according to the actual situation of the working surface to ensure the stability and adaptability of the support device.

[0070] Combination Figure 7As shown, in this embodiment, the first valve 2110 includes a tube body 2111 and a spherical body 2112. The inner cavity of the tube body 2111 is small at both ends and large in the middle. The two ends of the tube body 2111 are respectively connected to the oil ports at the lower parts of the two third telescopic components 213. The spherical body 2112 is built into the tube body 2111. The diameter of the spherical body 2112 is smaller than the diameter of the inner cavity in the middle part of the tube body 2111, and the diameter of the spherical body 2112 is larger than the diameter of the inner cavity at both ends of the tube body 2111. The tube body 2111 is preferably in a "U" shape, and the density of the sphere 2112 is preferably greater than the density of the oil in the third telescopic assembly 213. When the oil pressure difference between the two third telescopic assemblies 213 is less than or equal to the first threshold, the first valve 2110 is in an open state, and when the oil pressure difference between the two third telescopic assemblies 213 is greater than the first threshold, the first valve 2110 is in a closed state. Compared with the situation where the two third telescopic assemblies 213 are connected in series with the hydraulic pump, the uneven oil pressure flow in the third telescopic assembly 213 can be alleviated, which can cause vibration, instability, and cylinder falling.

[0071] Further, the first bracket 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 realizes secondary regulation of the hydraulic oil output by the hydraulic pump to ensure smooth operation of the telescopic action 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-row shielding support device includes a first guard plate 51 and a second guard plate 52, one end of the first guard plate 51 is connected to the first top plate 212; one end of the second guard plate 52 is slidably connected to the other end of the first guard plate 51, and the other end of the second guard plate 52 is connected to the first bottom plate 211. When the two-row shielding support device is working, the first guard plate 51 and the second guard plate 52 can be telescopically adjusted according to the actual width of the working surface. Through the fixed connection between the first guard plate 51 and the first top plate 212, and the sliding connection between the second guard plate 52 and the first guard plate 51, a dynamically adjusted protection area is formed to provide comprehensive coverage and protection for the working surface. The combined use of the first guard plate 51 and the second guard plate 52 not only increases the protection area during the retraction process of the working surface support and improves safety, but also enables the two-row shielding support device to adapt to working surfaces of different widths, thereby enhancing its application flexibility and adaptability.

[0073] Furthermore, the first bracket 21 includes a fourth telescopic component 26, a sliding shoe 27, a fifth telescopic component 28 and a slide plate 29. The two ends of the fourth telescopic component 26 are respectively connected to the two first top plates 212. The fourth telescopic component 26 is telescopically arranged along the first preset direction; the sliding shoe 27 is connected to the first bottom plate 211 through the fifth telescopic component 28; and the slide plate 29 is connected to the first top plate 212 through the sixth telescopic component 2100. Through the extension and retraction of the fourth telescopic component 26, the first top plate 212 can be extended and retracted in the horizontal direction to adapt to work surfaces of different widths, providing a more stable and comprehensive top support. The telescopic movement of the fifth telescopic component 28 can adjust the contact height of the sliding shoe 27 with the ground. The telescopic movement of the fifth telescopic component 28 can adjust the contact height of the sliding shoe 27 with the ground, so that the sliding shoe 27 of the support device can maintain the best contact state under different ground conditions, thereby improving the stability of the equipment.

[0074] In another embodiment of the present application, the first bracket 21 includes an adapter column 25, a first end of the adapter column 25 is rotatably connected to the first top plate 212, and a second end of the adapter column 25 is hinged to the fourth telescopic assembly 26, wherein an adapter column 25 is respectively arranged on the two first top plates 212, and the two adapter columns 25 are respectively hinged to the two ends of the fourth telescopic assembly 26.

[0075] In one embodiment of the present application, there are two groups of fourth telescopic components 26 , and the two groups of fourth telescopic components 26 are arranged at intervals in the length direction of the first top plate 212 .

[0076] In one embodiment of the present application, there are two groups of fourth telescopic components 26 , and the two groups of fourth telescopic components 26 are arranged at intervals along the length direction of the first bottom plate 211 .

[0077] In another embodiment of the present application, a working surface support retraction system is further provided, comprising two rows of shielding support devices 20, and the two rows of shielding support devices 20 are the two rows of shielding support devices 20 in the above embodiment.

[0078] Specifically, the working surface support retraction system also includes a working surface support 10 and a triangular area lifting device 40, such as Figure 8 As shown, the positional relationship between the working face support 10, two rows of shielding support devices 20, and the goaf 30, and the position of the triangular area formed by the working face support 10, two rows of shielding support devices 20, and the goaf 30. The following triangular area lifting device 40 is used to support the triangular area.

[0079] Working process of the working face support withdrawal system: the triangular area lifting device 40, the working face support 10 and the two rows of shielding support devices 20 are all in the supporting state, and the working face support 10 to be withdrawn is pulled out by the winch, and the triangular area lifting device 40 and the two rows of shielding support devices 20 move forward one by one, and then repeat. The two first brackets 21 of the two rows of shielding support devices 20 move forward alternately relative to each other, so that the shielding support moves automatically.

[0080] See also Fig. 9 An embodiment of the present 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, and the second bracket 41 includes a second bottom plate 411. The two second bottom plates 411 are connected by a guide assembly 42. Any second bottom plate 411 moves linearly relative to the other second bottom plate 411 under the constraint of the guide assembly 42. The two second bottom plates 411 are connected by an eighth telescopic assembly 43. The eighth telescopic assembly 43 is telescopically arranged along the width direction of the second bottom plate 411. Under the action of the eighth telescopic assembly 43, the two second bottom plates 411 are relatively close to or far away from each other.

[0081] In a preferred embodiment of the present application, two second bottom plates 411 are arranged side by side along the width direction of the second bottom plate 411, and the two second bottom plates 411 are hinged to the two ends of the eighth telescopic assembly 43 respectively. There are two eighth telescopic assemblies 43, and the two eighth telescopic assemblies 43 are arranged at intervals along the length direction of the second bottom plate 411. There are two groups of guide assemblies 42, and the two groups of guide assemblies 42 are arranged at intervals along the length direction of the second bottom plate 411. Under the action of the eighth telescopic assembly 43, the two second brackets 41 move forward in a straight line along the guide assembly 42. Compared with the support column that rotates and moves forward in the prior art, the present application does not need to reduce the size to ensure the rotation space, which ensures that the contact area between the second bracket 41 and the top plate of the triangular area can be maximized.

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

[0083] Furthermore, the second bracket 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, 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, the seventh telescopic component 413 is divided into two groups, and the two groups of seventh telescopic components 413 are arranged at intervals 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 Fig.11 As shown, a column ball 70 is provided at each end of the seventh telescopic component 413, the first end face of the column ball 70 is connected to the seventh telescopic component 413, the second end face of the column ball 70 is a spherical surface, and 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 Fig.11 As shown, the first end of the seventh telescopic assembly 413 is hinged to the second top plate 412 , and the second end of the seventh telescopic assembly 413 is hinged to the second bottom plate 411 .

[0087] Preferably, the upper and lower ends of the seventh telescopic component 413 are both provided with pin holes, and the pin rod passes through the pin hole to connect with the second top plate 412 or the second bottom plate 411, the center of the pin hole coincides with the center of the sphere of the column socket, the axial direction of the pin rod is parallel to the length direction of the second top plate 412 or the second bottom plate 411, and the inner diameter of the pin hole is preferably greater than the outer diameter of the pin rod. By adopting the connection method of the column ball 70 and the column socket, the force direction of the seventh telescopic component 413 is roughly along its axial direction, and the supporting strength is high.

[0088] Combination Fig.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 clamp 417. A gasket 418 is provided between the inner wall of the fixing clamp 417 and the outer wall of the fixed end of the seventh telescopic component 413. The gasket 418 is made of elastic material.

[0089] Combination Fig.10 As shown, there are two fixing clips 417 , the first ends of the two fixing clips 417 are both connected to the second bottom plate 411 , and the second ends of the two fixing clips 417 are connected to each other.

[0090] Exemplarily, there are two fixing clips 417, the two fixing clips 417 are hinged to the second bottom plate 411, the two fixing clips 417 are connected together, and together with the second bottom plate 411, a circular inner wall is formed, and the fixed end of the seventh telescopic component 413 is columnar, the outer diameter of the fixed end of the seventh telescopic component 413 is equal to the inner diameter of the washer 418, and the outer diameter of the washer 418 is equal to the inner diameter of the fixing clip 417. Or the fixing clip 417 is rotatably connected to the second bottom plate 411. If the second top plate 412 is tilted, the washer 418 is deformed, and the seventh telescopic component 413 and the fixing clip 417 are relatively slightly rotated and fine-tuned, which is conducive to adjusting the force direction of the seventh telescopic component 413 along its axial direction, thereby improving the support strength.

[0091] Combination Fig.10 As shown, the fixing clamp 417 includes a first arc plate 4171, a second arc plate 4172, and a third arc plate 4173 connected end to end, the first arc plate 4171 and the second arc plate 4172 are hinged, the second arc plate 4172 and the third arc plate 4173 are fixedly connected, there are two second arc plates 4172, and the two second arc plates 4172 are relatively parallel and arranged between the first arc plate 4171 and the third arc plate 4173.

[0092] It should be noted that the telescopic components such as 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 can be the same or different. In a specific embodiment of the present application, each telescopic component includes at least one telescopic rod, which can be driven by a cylinder or a motor.

[0093] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0094] The first telescopic assembly 22 can drive the two first brackets 21 to make relative movements in the length direction of the first bracket 21, and the second telescopic assembly 23 can drive the two first brackets 21 to make relative movements in the width direction of the first bracket 21, thereby enhancing the adaptability and flexibility of the support device. During the movement process, both the relatively stable movement of the first bracket 21 and the relatively linear movement of the first bracket 21 are ensured, thereby solving the problem that the shielding bracket in the prior art is not only prone to tipping over when moving forward, but also difficult to maintain a straight line forward, resulting in a time-consuming and laborious withdrawal process.

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

[0096] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of this application.

[0097] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0098] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A two-row shielding support device, characterized in that: include: A first bracket (21), wherein the number of the first brackets (21) is two, and the two first brackets (21) are arranged side by side along a width direction of the first bracket (21); A first telescopic component (22), wherein 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; a second telescopic component (23), wherein 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 assembly (22) and the second telescopic assembly (23) drive one of the two first brackets (21) to perform reciprocating motion relative to the other.

2. The two-row shielding support device according to claim 1 is characterized in that: The first bracket (21) comprises: A first bottom plate (211), wherein a first end of the first bottom plate (211) is connected to the first telescopic assembly (22), and a second end of the first bottom plate (211) is connected to the second telescopic assembly (23); a third telescopic component (213), one end of the third telescopic component (213) being connected to the third end of the first bottom plate (211), the third telescopic component (213) being 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 (212), the first top plate (212) being connected to the other end of the third telescopic assembly (213); The third telescopic assembly (213) drives the first top plate (212) to perform reciprocating motion along the third preset direction relative to the first bottom plate (211).

3. The two-row shielding support device according to claim 2 is characterized in that: The third telescopic components (213) are divided into two groups, and the two groups of the third telescopic components (213) are arranged at intervals along the length direction of the first bracket (21).

4. The two-row shielding support device according to claim 2 or 3, characterized in that: The first bracket (21) comprises 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).

5. The two-row shielding support device according to claim 4 is characterized in that: The connecting rod assembly (24) comprises: A first connecting rod (241), the first connecting rod (241) being connected to a fourth end of the first bottom plate (211); a second connecting rod (242), wherein a first end of the second connecting rod (242) is movably connected to the first top plate (212); a third connecting rod (243), wherein a first end of the third connecting rod (243) is movably connected to a first end of the first connecting rod (241), and a second end of the third connecting rod (243) is movably connected to a second end of the second connecting rod (242); a fourth connecting rod (244), wherein a first end of the fourth connecting rod (244) is movably connected to a second end of the first connecting rod (241), and a second end of the fourth connecting rod (244) is movably connected to a third end of the second connecting rod (242); The third telescopic assembly (213) drives the second connecting rod (242), the third connecting rod (243), and the fourth connecting rod (244) to rotate relative to the first connecting rod (241), thereby driving the first top plate (212) to reciprocate relative to the first bottom plate (211) along the third preset direction.

6. The two-row shielding support device according to claim 2 or 3, characterized in that: The first bracket (21) comprises: A hydraulic pump, wherein an output end of the hydraulic pump is respectively connected to first ends of the third telescopic components (213) on two adjacent first brackets (21); A first valve (2110), wherein two ends of the first valve (2110) are respectively connected to the second ends of the third telescopic components (213) on two adjacent first brackets (21).

7. The two-row shielding support device according to claim 6, characterized in that: The first bracket (21) comprises: A second valve is connected in series between the hydraulic pump and the first end of the third telescopic assembly (213).

8. The two-row shielding support device according to claim 2 or 3, characterized in that: The two rows of shielding and supporting devices include: A first guard plate (51), one end of the first guard plate (51) being connected to the first top plate (212); A second guard plate (52), one end of the second guard plate (52) is slidably connected to the other end of the first guard plate (51), and the other end of the second guard plate (52) is connected to the first bottom plate (211).

9. The two-row shielding support device according to claim 2 or 3, characterized in that: The first bracket (21) comprises: a fourth telescopic component (26), two ends of the fourth telescopic component (26) being respectively connected to the two first top plates (212), and the fourth telescopic component (26) being telescopically arranged along the first preset direction; a sliding shoe (27), wherein the sliding shoe (27) is connected to the first bottom plate (211) via a fifth telescopic assembly (28); A slide plate (29), wherein the slide plate (29) is connected to the first top plate (212) via a sixth telescopic assembly (2100).

10. A working face support retraction system, comprising two rows of shielding support devices, characterized in that: The two-row shielding and supporting device is the two-row shielding and supporting device according to any one of claims 1 to 9.

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