Sliding type temporary supporting device

Abstract

The invention relates to a sliding type temporary supporting device, and relates to the technical field of tunneling of underground engineering. Comprising two symmetrically-arranged supporting columns of a square structure, a supporting rod is jointly installed between the supporting columns, a sliding groove with the two sides communicated is formed in the upper end of the supporting rod, extending plates extend from the opposite sides of the upper ends of the two supporting columns, and the extending plates of the supporting columns are slidably arranged in the sliding groove; the supporting columns and the supporting rods are jointly provided with a supporting mechanism adapting to a roadway with the arc-shaped top. The sliding type temporary supporting device can solve the following problems existing in the process of sliding type temporary supporting devices in the prior art: firstly, the sliding type temporary supporting device can adapt to roadways with square and arc-shaped upper top surfaces, a specific supporting system does not need to be designed for each shape, the requirement for replacing the supporting system is reduced, and the long-term operation cost is reduced; and secondly, the telescopic columns are arranged to adapt to concave-convex surfaces of different sizes and shapes, it is ensured that the supporting structure is tightly attached to the surface of the roadway, and therefore the stability and effectiveness of supporting are improved.

Description

Technical Field

[0001] The invention relates to the technical field of underground engineering excavation, and in particular to a sliding type temporary supporting device. Background Art

[0002] In underground engineering, especially in coal mining and tunneling, roof safety management during tunneling has always been the focus and difficulty of engineering safety. Traditionally, temporary support is required immediately after tunneling to prevent roof collapse and rock movement and ensure the safety of workers. However, traditional temporary support methods have many limitations, such as slow support speed, high labor intensity, low safety, and poor adaptability to complex geological conditions.

[0003] With the development of technology, hydraulic support technology has gradually become the mainstream, but there are still some problems. For example, the traditional hydraulic support needs frequent adjustment and operation during installation and removal, which is not only time-consuming and labor-intensive, but also its support effect and adaptability cannot fully meet the requirements under complex geological conditions. In addition, traditional support methods often need to be carried out after the tunnel boring machine stops working, which greatly reduces the operation efficiency.

[0004] For example, a Chinese patent with publication number CN108756982A discloses a two-degree-of-freedom sliding temporary support device and its working method. The device includes a first support device, a second support device, a frame moving drive device and a frame moving auxiliary device. The first support device and the second support device are connected by a frame moving drive device and a frame moving auxiliary device. A bottom lifting device is provided at the bottom of the first support device to facilitate sliding forward. Under the joint action of the frame moving drive device and the frame moving auxiliary device, the sliding temporary support device can automatically slide forward to the designated working position. The first support device and the second support device adopt a structure of two groups of three linear drive devices and a hinge connection combination, so that the jacking support has two degrees of freedom. It solves the problem that the device is prone to overall skew when the tunnel ground and the top surface are not parallel. At the same time, no auxiliary equipment is required when moving the frame, the pushing step is large, the support is safer and more reliable, and it has the advantages of high work efficiency, high degree of automation, and good adaptability to the tunnel top surface.

[0005] However, the above two-degree-of-freedom sliding temporary support device and its working method still have some shortcomings in actual use: 1. The above device solves the problem that the device is prone to overall skew when the tunnel ground and top surface are not parallel. However, in actual situations, the tunnels that need to be supported may be circular, square or other irregular shapes. The above device can only be used when the top of the tunnel is flat, and its scope of application is relatively small.

[0006] 2. The above-mentioned device supports the interior of the tunnel through the first supporting device and the second supporting device. However, in the actual coal mining, tunnel excavation and other operations, the interior of the tunnel will have uneven surfaces. During the temporary support process, the supporting device cannot completely adhere to the inner surface of the tunnel and may not be able to provide sufficient support in some areas, which will increase the risk of tunnel collapse.

[0007] Therefore, based on the above-stated viewpoints, there is still room for improvement in the existing two-degree-of-freedom sliding temporary support device and its working method. Summary of the invention

[0008] In order to solve the above problems, the present invention provides a sliding temporary support device, comprising two groups of support columns with symmetrically arranged square structures, a support rod is commonly installed between the support columns, a slide groove penetrating on both sides is opened at the upper end of the support rod, extension plates extend on opposite sides of the upper ends of the two support columns, the extension plates of the support columns are slidably arranged in the slide groove, a fixed column is arranged below the support column, a working groove is opened inside the fixed column, a cylinder is installed in the working groove, the support column is connected to the cylinder through the bottom, and the support column is slidably arranged inside the working groove, and a support mechanism that adapts to the tunnel with an arc-shaped top is commonly arranged on the support column and the support rod.

[0009] The support mechanism includes a telescopic column, and a through groove is commonly formed on the support column and the support rod. A plurality of support shafts are slidably arranged inside the through groove. The telescopic column is installed on the support shaft, and telescopic plates are commonly installed on the telescopic ends of adjacent telescopic columns. A supporting plate is also installed between the telescopic columns on the opposite support columns and the support rod.

[0010] Preferably, a driving unit for driving the telescopic column to move along the through groove is commonly installed on the support column and the support rod; the driving unit includes a stretching block, which is arranged at one end of the support shaft and is slidably installed on the outer wall of the support column and the support rod, a stretching spring is commonly arranged between the stretching blocks, a pull rope is also installed between the stretching blocks, a winding roller is installed on the support column and the support rod, a pull rope is also arranged between adjacent stretching blocks and winding rollers, and a pull rope is also arranged between the winding roller on the support column and the adjacent stretching block.

[0011] Preferably, the support column and the support rod are also equipped with a fixing mechanism for limiting and fixing the stretching block, the fixing mechanism includes a horizontal plate, the horizontal plate is installed at the top of the support column along the length direction of the support column, and a vertical plate is also installed in the height direction of the support column. A fixing plate is installed on the support rod along its length direction, and conical accommodating grooves are symmetrically opened on the stretching block. The horizontal plate, the vertical plate and the fixed plate are all equipped with limiting members that cooperate with the accommodating grooves to limit the stretching block.

[0012] Preferably, the limiting member comprises fixing grooves equidistantly arranged on the horizontal plate, the vertical plate and the fixing plate, a fixing spring is installed inside the fixing groove, and a conical fixing block matching the accommodating groove is arranged at one end of the fixing spring.

[0013] Preferably, the support column is also equipped with mounting parts that are evenly distributed when the stretching block is driven to move into the slide groove. The mounting parts include mounting springs. The vertical plate is provided with a receiving groove at the inner corner. The receiving groove is provided with a mounting spring. A limit block is installed at one end of the mounting spring close to the stretching block, and the limit block is adapted to the receiving groove.

[0014] Preferably, a rotating assembly for driving the telescopic column to rotate is installed on the support column at a corner on the side away from the vertical plate, and the rotating assembly includes a rotating rack, and the rotating rack is arranged at the corner of the through groove. A rotating gear is installed on the end of the support shaft away from the stretching block, and the rotating gear is movably engaged with the rotating rack.

[0015] Preferably, the elastic force of the installation spring is greater than the elastic force of the fixing spring, and the elastic force of the fixing spring is greater than the elastic force of the tension spring.

[0016] Preferably, the support plates are all telescopic structures.

[0017] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present invention can adapt to lanes with square and curved top surfaces and lane tops of different shapes by providing support columns, support rods and support mechanisms adapted to lanes with curved tops. There is no need to design a specific support system for each shape, which reduces the need to replace the support system, thereby reducing long-term operating costs.

[0018] 2. The present invention provides a liftable support column and drives one end of the support column to slide in the support rod, so that it can be adjusted according to the size of the lane and can adapt to the inner surface of the lane to support it, allowing the support column to adapt to lanes of different depths and ensuring that the supporting force is evenly distributed.

[0019] 3. Since there will be uneven soil and stones on the surface of the tunnel during temporary support, the present invention provides telescopic columns to adapt to uneven surfaces of different sizes and shapes, ensuring that the support structure fits tightly with the tunnel surface, thereby improving the stability and effectiveness of the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2It is a partial structural schematic diagram of the present invention.

[0023] Figure 3 It is a structural schematic diagram of the support column of the present invention.

[0024] Figure 4 It is a schematic cross-sectional structure diagram of the fixing column and the supporting column of the present invention.

[0025] Figure 5 The present invention Figure 3 Schematic diagram of the structure at A in the middle.

[0026] Figure 6 It is a schematic diagram of the position structure of the fixing column and the supporting column of the present invention.

[0027] Figure 7 The present invention Figure 5 Schematic diagram of the structure at B in the figure.

[0028] Figure 8 It is a structural schematic diagram of the back side of the fixing column and the supporting column of the present invention.

[0029] Fig. 9 The present invention Figure 7 Schematic diagram of the structure at C in the middle.

[0030] In the figure, 1. support column; 10. support rod; 11. slide groove; 12. fixed column; 13. working groove; 14. cylinder; 2. support mechanism; 20. through groove; 21. support shaft; 22. telescopic column; 23. telescopic plate; 24. support plate; 3. drive unit; 30. stretching block; 31. stretching spring; 32. pull rope; 33. winding roller; 4. fixing mechanism; 40. horizontal plate; 41. vertical plate; 42. fixed plate; 43. accommodating groove; 44. limiter; 440. fixed spring; 441. fixed block; 45. mounting member; 450. mounting spring; 451. limiter; 5. rotating assembly; 50. rotating rack; 51. rotating gear; 60. conical plate; 61. crawler transport device. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-Figure 9 Embodiments of the present invention are described in detail.

[0032] The embodiment of the present application discloses a sliding temporary support device, which explains that the sliding temporary support device is mainly used in the process of excavation of underground engineering, and can avoid the problem of being unable to adapt to the round, square or other irregular shapes of the tunnels that need to be supported in terms of technical effect; the sliding temporary support device can also effectively avoid the problem of uneven surfaces inside the tunnel, and during the temporary support process, the support device cannot completely adhere to the inner surface of the tunnel.

[0033] Embodiment 1: Reference Figure 1 Figure 2 and Figure 3 As shown, it includes two groups of symmetrically arranged square structure support columns 1, and a support rod 10 is installed between the support columns 1. The upper end of the support rod 10 is provided with a slide groove 11 that penetrates on both sides. An extension plate extends from the opposite sides of the upper ends of the two support columns 1. The extension plate of the support column 1 is slidably arranged in the slide groove 11. By sliding the extension plate in the slide groove 11, the support column 1 can be controlled to slide along the length direction of the support rod 10, and then it can be adjusted according to the width of the lane to adapt to different lanes and improve practicality. A fixed column 12 is arranged below the support column 1, and a working groove 13 is opened inside the fixed column 12. A cylinder 14 is installed in the working groove 13. The support column 1 is connected to the cylinder 14 through the bottom, and the support column 1 is slidably arranged inside the working groove 13. The support column 1 is driven to rise and fall on the fixed column 12 by the cylinder 14. When the support column 1 rises and falls, the height of the support rod 10 connected to the support column 1 will also be adjusted accordingly. Therefore, the height of the support rod 10 can be adjusted according to different lanes. By adjusting the distance between the support columns 1 and the height of the support columns 1, it can adapt to square lanes of different sizes and be adjusted according to the size of the lanes. The support columns 1 and the support rods 10 are jointly provided with a support mechanism 2 that adapts to lanes with curved tops.

[0034] See also Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, specifically, the support mechanism 2 includes a telescopic column 22, a through slot 20 is provided on the support column 1 and the support rod 10, a plurality of support shafts 21 are slidably provided inside the through slot 20, and the telescopic column 22 is installed on the support shaft 21. In the initial state, the telescopic column 22 is placed inside the support column 1. When facing a lane with an arc-shaped top, the support shaft 21 moves from the support column 1 to the support rod 10 along the through slot 20, and gradually stands up when moving to the support rod 10. At this time, the telescopic column 22 will be telescoped accordingly according to the height and size of the lane to adapt to the shape of the lane. The telescopic ends of adjacent telescopic columns 22 are jointly installed with a telescopic plate 23, and the telescopic plate 23 is used to support the horizontal direction in the lane. A supporting plate 24 is also installed between the telescopic columns 22 on the opposite support column 1 and the support rod 10, and the telescopic plate 23 is used to support the longitudinal direction in the lane. Through the cooperation of the telescopic plate 23 and the supporting plate 24, the contact area with the lane surface is increased, and the supporting effect is improved.

[0035] The support plates 24 are all telescopic structures, and their lengths can be adjusted according to actual needs to adapt to tunnels or spaces of different widths and heights, ensuring the tightness and effectiveness of the support. The support plates 24 can be more convenient to transport and install, reducing space occupancy and facilitating operation in narrow or complex underground environments.

[0036] Reference Figure 3 , Figure 4 and Figure 5 As shown, it is a schematic diagram of the structure for driving the telescopic column 22 to move; specifically, a driving unit 3 for driving the telescopic column 22 to move along the through slot 20 is commonly installed on the support column 1 and the support rod 10; the driving unit 3 includes a stretching block 30, the stretching block 30 is arranged at one end of the support shaft 21 and is slidably installed on the outer wall of the support column 1 and the support rod 10, a stretching spring 31 is commonly arranged between the stretching blocks 30, a pull rope 32 is also installed between the stretching blocks 30, a winding roller 33 is installed on the support column 1 and the support rod 10, wherein the stretching spring 31 is a compression spring, which is used to drive two adjacent stretching blocks 30 to approach each other; a pull rope 32 is also arranged between adjacent stretching blocks 30 and the winding roller 33, and a pull rope 32 is also arranged between the winding roller 33 on the support column 1 and its adjacent stretching block 30.

[0037] In the initial state, all the stretching blocks 30 are stored inside the support column 1 through the stretching spring 31. When the telescopic column 22 is needed, the winding roller 33 on the support rod 10 rotates counterclockwise under the action of the external drive, pulling a stretching block 30 connected thereto to move, so as to drive the telescopic column 22 to move onto the support rod 10, and the winding roller 33 on the support column 1 will rotate counterclockwise at the same time. The stretching block 30 close to the winding roller 33 moves, and under the action of the stretching spring 31, the stretching block 30 adjacent to it will be pulled to move. According to the different widths of the lanes, the number of turns of the winding roller 33 is different. By adjusting the number of turns of the winding roller 33, the number of telescopic columns 22 required for lanes of different widths can be adapted.

[0038] When the telescopic column 22 needs to be retracted, the winding roller 33 on the support column 1 rotates clockwise, and at the same time, the winding roller 33 on the support rod 10 rotates clockwise under the action of external drive, pulling the stretching block 30 close to it to move, so that the stretching block 30 returns to the through groove 20 of the support column 1 with the support shaft 21.

[0039] Reference Figure 6 and Figure 7As shown, it is a schematic diagram of the structure for limiting the stretching block 30; specifically, the support column 1 and the support rod 10 are also equipped with a fixing mechanism 4 for limiting and fixing the stretching block 30. The stretching block 30 is fixed by the fixing mechanism 4 to prevent the telescopic column 22 on the stretching block 30 from being displaced when supporting the inner wall of the tunnel, thereby affecting the support effect and the safety of the construction personnel. The fixing mechanism 4 includes a horizontal plate 40, which is installed on the top of the support column 1 along the length direction of the support column 1. A vertical plate 41 is also installed in the height direction of the support column 1. A fixing plate 42 is installed on the support rod 10 along its length direction. The stretching block 30 is symmetrically provided with a conical receiving groove 43. The horizontal plate 40, the vertical plate 41 and the fixing plate 42 are all equipped with a limiting member 44 that cooperates with the receiving groove 43 to limit the stretching block 30. The limiting member 44 cooperates with the receiving groove 43 on the stretching block 30 to fix the stretching block 30.

[0040] Reference Figure 6 As shown in FIG. 7 , it is a schematic diagram of a structure for further limiting the stretching block 30; specifically, the limiting member 44 includes fixed grooves equidistantly arranged on the horizontal plate 40, the vertical plate 41 and the fixed plate 42, and a fixed spring 440 is installed inside the fixed groove, and a conical fixed block 441 matching the receiving groove 43 is arranged at one end of the fixed spring 440. In the initial state, the fixed block 441 is located outside the fixed groove under the action of the fixed spring 440. When the stretching block 30 moves to the position of the fixed groove, the fixed block 441 will be squeezed during the movement, driving the fixed spring 440 to shrink and enter the fixed groove. When the receiving groove 43 on the stretching block 30 coincides with the fixed groove, the fixed block 441 enters the receiving groove 43 under the action of the fixed spring 440 to fix the stretching block 30.

[0041] Reference Figure 6 and Figure 7 As shown, it is a schematic diagram of the structure for controlling the moving distance of the stretching block 30; specifically, the support column 1 is also equipped with mounting parts 45 that are evenly distributed when driving the stretching block 30 to move to the inside of the slide groove 11, and the mounting parts 45 include mounting springs 450. The vertical plate 41 is provided with a receiving groove at the inner corner, and the receiving groove is provided with a mounting spring 450. A limit block 451 is installed at one end of the mounting spring 450 close to the stretching block 30, and the limit block 451 is adapted to the accommodating groove 43.

[0042] The purpose of setting the mounting member 45 is that when the support shaft 21 on the support column 1 moves to the support rod 10, since the spacing between the support shafts 21 on the support column 1 is small, and the spacing between the support shafts 21 moved to the support rod 10 is large, the two adjacent stretching blocks 30 are fixed at the corner by the mounting member 45, and when the stretching block 30 that first enters the support rod 10 moves under the control of the winding roller 33, the adjacent stretching block 30 will be fixed under the drive of the mounting member 45, and at this time, the pull rope 32 between the two stretching blocks 30 gradually changes from a relaxed state to a tight state, and when the pull rope 32 is fully straightened, the moving stretching block 30 will pull the fixed stretching block 30, and when the stretching block 30 moves to the support rod 10, the stretching block 30 will be limited by the fixed block 441, and the spacing of the fixed blocks 441 on the support rod 10 is the same as the length of the pull rope 32 between the stretching blocks 30, thereby, the stretching block 30 will be gradually fixed with the corresponding fixed block 441 under the cooperation of the mounting member 45.

[0043] Reference Figure 8 and Fig. 9 As shown, it is a schematic diagram of the structure for driving the telescopic column 22 to rotate; specifically, a rotating component 5 for driving the telescopic column 22 to rotate is installed on the support column 1 at a corner on the side away from the vertical plate 41, and the rotating component 5 includes a rotating rack 50, and the rotating rack 50 is arranged along the corner of the through groove 20. A rotating gear 51 is installed at one end of the support shaft 21 away from the stretching block 30, and the rotating gear 51 is movably engaged with the rotating rack 50.

[0044] When the support shaft 21 moves inside the through groove 20 following the stretching fastener, when the rotating gear 51 on the support shaft 21 passes through the rotating rack 50, it will rotate under the drive of the rotating gear 51, thereby driving the telescopic column 22 to rotate. The purpose of this arrangement is that the telescopic column 22 will be tilted and fixed inside the support column 1 in the initial state, and when it moves to the support rod 10, it needs to be perpendicular to the alley to support the inner wall of the alley, and the telescopic column 22 is driven to rotate through the cooperation of the rotating gear 51 and the rotating rack 50.

[0045] Reference Figure 7As shown, it is a structural schematic diagram further illustrating the limiting principle of the mounting member 45 on the stretching block 30; specifically, the elastic force of the mounting spring 450 is greater than the elastic force of the fixed spring 440, and the elastic force of the fixed spring 440 is greater than the elastic force of the stretching spring 31. The purpose of this arrangement is that when the stretching block 30 close to the winding roller 33 is moved from the support column 1 to the support rod 10, the stretching block 30 adjacent to it will be limited by the mounting spring 450. Since the elastic force of the mounting spring 450 is greater than the elastic force of the stretching spring 31, before the pull rope 32 between the stretching blocks 30 is fully straightened, the stretching spring 31 will not drive the adjacent stretching blocks 30 to move and pull the distance between the two stretching blocks 30 apart. When the pull rope 32 is fully straightened, the stretching block 30 moves to the corresponding accommodating groove 43, the pulling force of the winding roller 33 will pull the stretching block 30, so that the limiting block 451 on the mounting spring 450 releases the restriction on the stretching block 30.

[0046] Subsequently, the stretching block 30 continues to move and the pull rope 32 contracts. When the stretching block 30 moves to the next accommodating slot 43, the adjacent stretching block 30 will move to the current accommodating slot 43 and be limited by the fixed block 441 on the fixed spring 440. The elastic force of the fixed spring 440 is greater than the elastic force of the stretching spring 31. The stretching block 30 at the current accommodating slot 43 will not be taken away by the pull rope 32 spring until the stretching block 30 moves to the next accommodating slot 43. The pull rope 32 straightens and drives the stretching block 30 to move. In this way, after the telescopic column 22 on the stretching block 30 moves from the support rod 10 to the support rod 10, the distance gradually increases, and the telescopic plate 23 gradually unfolds to support the inside of the tunnel.

[0047] Embodiment 2: On the basis of the first embodiment, in order to further improve the applicability of the present invention, a crawler transport device 61 is also proposed, which is beneficial to increase the stability of the fixed column 12 and helps the fixed column 12 to adapt to different ground conditions.

[0048] Reference Figure 1 As shown, it is a schematic diagram of the structure that drives the fixed column 12 to move; specifically, a conical plate 60 is installed at the bottom of the fixed column 12 through an external drive rotation, and a crawler transport device 61 is installed in the conical plate 60. The crawler transport device 61 is a prior art. When it is necessary to support different positions inside the tunnel, the crawler transport device 61 can provide good mobility and can adapt to the complex and changeable terrain inside the tunnel to ensure the stability of the support.

[0049] The rotatably mounted conical plate can drive the support columns 1 to move along the width direction of the support plate 24, so that the distance between the support columns 1 can adapt to the width of the tunnel.

[0050] During operation: the first step is to move the device to the tunnel where support work needs to be carried out through the crawler transport device 61, control the support columns 1 on both sides of the support rod 10, slide on the support columns 1, and adjust the distance between the support columns 1 according to the width of the tunnel to adapt to tunnels of different widths.

[0051] Step 2: The support column 1 is driven to rise and fall on the fixed column 12 by the cylinder 14. When the support column 1 is raised and lowered, the height of the support rod 10 is adjusted according to different lanes. By adjusting the distance between the support columns 1 and the height of the support column 1, it can adapt to square lanes of different sizes and be adjusted according to the size of the lane.

[0052] Step 3: The winding roller 33 rotates clockwise under the action of an external drive, pulling a stretching block 30 connected thereto to move, driving the telescopic column 22 to move onto the support rod 10, and then limiting and fixing it through the fixing block 441.

[0053] Step 4: When the rotating gear 51 on the support shaft 21 passes through the rotating rack 50, it will rotate under the drive of the rotating gear 51, thereby driving the telescopic column 22 to rotate, and then the telescopic plate 23 gradually unfolds to support the inside of the tunnel.

[0054] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive.

[0055] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A sliding temporary support device, comprising two groups of symmetrically arranged square-structured support columns (1), wherein a support rod (10) is installed between the support columns (1), wherein the upper end of the support rod (10) is provided with a slide groove (11) passing through on both sides, and an extension plate extends from opposite sides of the upper ends of the two support columns (1), and the extension plate of the support column (1) is slidably arranged in the slide groove (11), characterized in that: A fixed column (12) is arranged below the support column (1), a working groove (13) is provided inside the fixed column (12), a cylinder (14) is installed in the working groove (13), the support column (1) is connected to the cylinder (14) through the bottom, and the support column (1) is slidably arranged inside the working groove (13), and a support mechanism (2) adapted to a lane with an arc-shaped top is jointly arranged on the support column (1) and the support rod (10); The support mechanism (2) comprises a telescopic column (22), the support column (1) and the support rod (10) are provided with a through slot (20), a plurality of support shafts (21) are slidably arranged inside the through slot (20), the telescopic column (22) is mounted on the support shaft (21), telescopic plates (23) are mounted on telescopic ends of adjacent telescopic columns (22), and a supporting plate (24) is also mounted between the telescopic columns (22) on the opposing support column (1) and the support rod (10).

2. The sliding temporary support device according to claim 1 is characterized in that: The support column (1) and the support rod (10) are jointly provided with a driving unit (3) for driving the telescopic column (22) to move along the through slot (20); the driving unit (3) comprises a stretching block (30), the stretching block (30) being arranged at one end of the support shaft (21) and being slidably mounted on the outer side wall of the support column (1) and the support rod (10); a stretching spring (31) is jointly arranged between the stretching blocks (30); a pull rope (32) is also arranged between the stretching blocks (30); a winding roller (33) is installed on the support column (1) and the support rod (10); a pull rope (32) is also arranged between adjacent stretching blocks (30) and the winding roller (33); and a pull rope (32) is also arranged between the winding roller (33) on the support column (1) and its adjacent stretching block (30).

3. The sliding temporary support device according to claim 2 is characterized in that: The support column (1) and the support rod (10) are also provided with a fixing mechanism (4) for limiting and fixing the stretching block (30), the fixing mechanism (4) comprising a horizontal plate (40), the horizontal plate (40) being installed at the top end of the support column (1) along the length direction of the support column (1), a vertical plate (41) being also installed in the height direction of the support column (1), a fixing plate (42) being installed on the support rod (10) along its length direction, a conical receiving groove (43) being symmetrically provided on the stretching block (30), and a limiting member (44) being installed on the horizontal plate (40), the vertical plate and the fixing plate (42) for cooperating with the receiving groove (43) to limit the stretching block (30).

4. The sliding temporary support device according to claim 3 is characterized in that: The limiting member (44) comprises fixing grooves which are equidistantly arranged on the horizontal plate (40), the vertical plate (41) and the fixing plate (42), a fixing spring (440) being installed inside the fixing groove, and a conical fixing block (441) which matches the accommodating groove (43) is provided at one end of the fixing spring (440).

5. The sliding temporary support device according to claim 4 is characterized in that: The support column (1) is also provided with mounting members (45) which are evenly spaced when the stretching block (30) is driven to move into the slide groove (11). The mounting members (45) include mounting springs (450). The vertical plate (41) is provided with a receiving groove at an inner corner. The receiving groove is provided with a mounting spring (450). A limit block (451) is installed at one end of the mounting spring (450) close to the stretching block (30). The limit block (451) is adapted to fit the receiving groove (43).

6. The sliding temporary support device according to claim 1 is characterized in that: A rotating assembly (5) for driving the telescopic column (22) to rotate is installed on the support column (1) at a corner away from the vertical plate (41), and the rotating assembly (5) comprises a rotating rack (50). The rotating rack (50) is arranged along the corner of the through slot (20). A rotating gear (51) is installed at one end of the support shaft (21) away from the stretching block (30), and the rotating gear (51) is movably meshed with the rotating rack (50).

7. The sliding temporary support device according to claim 5, characterized in that: The elastic force of the installation spring (450) is greater than the elastic force of the fixing spring (440), and the elastic force of the fixing spring (440) is greater than the elastic force of the tension spring (31).

8. The sliding temporary support device according to claim 1, characterized in that: The supporting plates (24) are all telescopic structures.

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