Device for rapidly detecting interface shear strength of sandstone grotto grouting material

Abstract

The invention discloses a sandstone grotto grouting material interface shear strength rapid detection device which comprises a base, a fixed table is fixedly connected to the middle of the upper end of the base, symmetrical supporting plates are slidably connected to the middle of the upper end of the base, and a fixed plate is fixedly connected to the upper portion of the end, close to the fixed table, of each supporting plate. A movable plate is slidably connected to the middle of the end, away from the supporting plate, of the fixed plate, a connecting plate is movably connected to the end, away from the fixed plate, of the movable plate, and a steering mechanism for adjusting the angle of the connecting plate is arranged in the middle of the side, close to the connecting plate, of the movable plate; a driving mechanism used for driving the steering mechanism to rotate is arranged on the side, close to the fixed plate, of the inner cavity of the movable plate. The driven rack drives the driving gear located above to rotate, so that the effect of changing the angle of the simulated crack in the vertical direction is achieved, and similarly, the driven plate is driven to rotate in the horizontal direction, so that the effect of changing the angle of the simulated crack in the horizontal direction is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of grouting material detection, in particular to a device for quickly detecting the interface shear strength of sandstone cave grouting materials. Background Art

[0002] There is often a thin layer of dangerous rock on the surface of the sandstone cave cliff, and the rock is very easy to weather and peel off. Therefore, fissure grouting is required to increase the bonding force between the dangerous rock and the main body and enhance the shear strength. The reinforcement effect is mainly controlled by the shear strength of the interface between sandstone and grouting materials (weak surface), so a rapid test device for measuring the interface shear strength is very important.

[0003] Most shear strength testing devices are aimed at testing the strength of the grouting material itself, which makes it difficult to reflect the bonding strength of the grouting material to the dangerous rock mass, and it is difficult to intuitively feel the position of the dangerous rock mass after different grouting materials are subjected to shear force. At the same time, it is also impossible to test the bonding strength of the grouting material to the dangerous rock mass under different rock cracks. Summary of the invention

[0004] The purpose of the present invention is to provide a device for quickly detecting the interface shear strength of sandstone cave grouting materials to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A rapid detection device for the interface shear strength of grouting materials in sandstone caves, comprising a base, a fixed platform fixedly connected to the middle of the upper end of the base, a symmetrical support plate slidably connected to the middle of the upper end of the base, a fixed plate fixedly connected to the upper end of the support plate close to the fixed platform, a movable plate slidably connected to the middle of the end of the fixed plate away from the support plate, a connecting plate movably connected to the end of the movable plate away from the fixed plate, a steering mechanism for adjusting the connecting plate angle is provided in the middle of one side of the movable plate close to the connecting plate, a driving mechanism for driving the steering mechanism to rotate is provided on the side of the inner cavity of the movable plate close to the fixed plate, and when the outer wall of the driving mechanism rotates, the steering mechanism rotates in the horizontal direction.

[0007] As a further solution of the present invention: the steering mechanism includes a cross key, a first connecting key is fixedly connected to the middle outer wall of the cross key, a second connecting key is fixedly connected to the middle of the lower end of the cross key, both sides of the upper end of the second connecting key are fixedly connected to the lower end of the first connecting key, the upper end of the cross key is fixedly connected to a connecting rod near the upper end of the fixed platform, the end of the connecting rod away from the cross key is fixedly connected to the middle of the connecting plate, the end of the connecting plate away from the connecting rod is magnetically connected to a driven plate, the upper parts of both sides of the driven plate are fixedly connected to elastic clamping plates, and a sealing belt is clamped between the elastic clamping plate and the driven plate.

[0008] As a further solution of the present invention: a symmetrical first guide groove is opened in the middle of the side of the first connecting key away from the cross key, a second guide groove is opened in the middle of the lower side of the second connecting key, the second guide groove and the inner cavity of the first guide groove are both slidably connected with guide blocks, and the middle of the end of the guide block away from the cross key is fixedly connected with a rotating column.

[0009] As a further solution of the present invention: a driven gear is fixedly connected to the side of the rotating column away from the cross key, a chain is meshed with the side of the driven gear away from the cross key, a driving gear is meshed with the side of the chain away from the driven gear, the driving gear is rotatably connected to the inner cavity side wall of the movable plate, a driven rack is provided on the side of the driving gear away from the chain, the driven rack is meshed with the driving gear, and a notch is provided in the middle of the driven rack.

[0010] As a further solution of the present invention: the driving mechanism includes a driving rod, which is movably connected to a side of the movable plate away from the connecting plate, a cavity is opened in the inner cavity of the movable plate near the driving rod, a fixed rod is fixedly connected to the side of the inner cavity away from the driving rod, the outer wall of the fixed rod is movably connected to the side wall of the driving rod, the inner cavity of the cavity is slidably connected to a fixed rack, and an end of the fixed rack away from the movable plate passes through the outer wall of the movable plate and is fixedly connected to the side wall of the inner cavity of the fixed plate.

[0011] As a further solution of the present invention: the outer wall of the driving rod is fixedly connected to a driving gear, and the bottom of the inner cavity of the cavity is slidably connected to a first rack and a second rack, respectively, the first rack and the second rack are symmetrical about the center position of the fixed rack, and the first rack, the second rack and the fixed rack are all meshed with the driving gear.

[0012] As a further solution of the present invention: the center position of the driven rack away from the fixed rod corresponds to the center position of the second rack, the center position of the driven rack close to the fixed rod corresponds to the center position of the first rack, the driven rack close to the fixed rod is fixedly connected to an extension rod on the side away from the driven gear, and one end of the extension rod away from the driven rack is fixedly connected to the center position of the first rack.

[0013] As a further solution of the present invention: three limit grooves are opened on one side of the inner cavity of the movable plate close to the cavity, the spacing between the first rack and the fixed rack is the same as the spacing between the fixed rack and the second rack, the spacing between two adjacent limit grooves is the same as the spacing between the first rack and the fixed rack, and the outer wall of the driving rod is vertically slidably connected with a plurality of limit rods, and the upper end of the limit rod is slidably matched with the limit groove.

[0014] As a further solution of the present invention: a blocking block is slidably engaged with the middle part of the side of the first rack and the second rack away from the fixed rack, and one end of the blocking block away from the fixed rack is slidably connected to the lower part of the inner cavity side wall of the cavity, and a groove is provided on the inner cavity side wall for slidingly engaging with the blocking block, and the position of the blocking block is in the same vertical plane as the center position of the driving gear.

[0015] As a further solution of the present invention: a fixed bracket is fixedly connected to the middle part of the upper end of the base, a first electric push rod is transmission-connected to the middle part of the upper end of the fixed bracket, a shear tester is fixedly connected to the output end of the first electric push rod, a slide groove is provided in the middle part of the upper end of the base for cooperating with the sliding of the support plate, and a second electric push rod is transmission-connected between the side wall of the inner cavity of the slide groove and the lower part of the support plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The driven rack drives the driving gear located above to rotate, and then drives the driven gear located above to rotate in the vertical direction, thereby driving the cross key to drive the connecting rod and the connecting plate to rotate in the vertical direction, so as to achieve the effect of changing the angle of the simulated crack in the vertical direction. Similarly, when the driving gear drives the second rack to rotate, the driven plate can be driven to rotate in the horizontal direction, so as to achieve the effect of changing the angle of the simulated crack in the horizontal direction, that is, by adjusting the position of the driving rod and then rotating the driving rod, the moving plate can be driven horizontally away from the fixed platform, so as to simulate rock cracks of different widths, and the driven plate can be driven to rotate to simulate rock cracks of different inclination angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the connecting plate in the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of the elastic clamping plate in the present invention.

[0021] Figure 4 Schematic diagram of the structure of the first connecting key in the present invention.

[0022] Figure 5 It is a schematic diagram of the structure of the chain in the present invention.

[0023] Figure 6 It is a schematic diagram of the structure of the driven rack in the present invention.

[0024] Figure 7 It is a schematic diagram of the structure inside the cavity of the present invention.

[0025] Figure 8It is a schematic diagram of the structure of the driving rod in the present invention.

[0026] Fig. 9 For the present invention Figure 8 Schematic diagram of the structure of area A.

[0027] Fig.10 It is a schematic structural diagram of the limiting rod in the present invention.

[0028] In the figure: 1, base; 2, fixed bracket; 3, shear tester; 4, support plate; 5, fixed plate; 6, movable plate; 7, driven plate; 8, connecting plate; 9, elastic clamping plate; 10, sealing belt; 11, fixed platform; 12, connecting rod; 13, cross key; 14, first connecting key; 15, second connecting key; 16, driven gear; 17, guide block; 18, rotating column; 19, first guide groove; 20, driving gear; 21, chain; 22, driven rack; 23, notch; 24, extension rod; 25, first rack; 26, second rack; 27, fixed rack; 28, driving gear; 29, fixed rod; 30, driving rod; 31, limit rod; 32, limit groove; 33, cavity; 34, clamping block; 35, second guide groove. DETAILED DESCRIPTION

[0029] See also Figure 1 In an embodiment of the present invention, a device for quickly detecting the interface shear strength of grouting materials for sandstone caves includes a base 1, a fixed platform 11 is fixedly connected to the middle of the upper end of the base 1, a symmetrical support plate 4 is slidably connected to the middle of the upper end of the base 1, a fixed plate 5 is fixedly connected to the upper end of the support plate 4 close to the fixed platform 11, a movable plate 6 is slidably connected to the middle of the end of the fixed plate 5 away from the support plate 4, a connecting plate 8 is movably connected to the end of the movable plate 6 away from the fixed plate 5, a steering mechanism for adjusting the angle of the connecting plate 8 is provided in the middle of one side of the movable plate 6 close to the connecting plate 8, a driving mechanism for driving the steering mechanism to rotate is provided on the side of the inner cavity of the movable plate 6 close to the fixed plate 5, and when the outer wall of the driving mechanism rotates, the steering mechanism rotates in the horizontal direction.

[0030] See also Figure 2 and Figure 3The steering mechanism includes a cross key 13, a first connecting key 14 is fixedly connected to the outer wall of the middle part of the cross key 13, a second connecting key 15 is fixedly connected to the middle part of the lower end of the cross key 13, both sides of the upper end of the second connecting key 15 are fixedly connected to the lower end of the first connecting key 14, the first connecting key 14 is annular and the second connecting key 15 is semicircular, the upper end of the cross key 13 is fixedly connected to a connecting rod 12 near the upper end of the fixed platform 11, the end of the connecting rod 12 away from the cross key 13 is fixedly connected to the middle part of the connecting plate 8, the end of the connecting plate 8 away from the connecting rod 12 is magnetically connected to the driven plate 7, a magnet is provided in the middle part of the inner cavity of the connecting plate 8, the side of the driven plate 7 close to the support plate 4 is fixedly connected to an iron sheet, and the lower end surface of the driven plate 7 is fixed to the fixed plate 8. The upper end surface of the fixed platform 11 is fitted, and the dangerous rock mass and the fixed rock mass are simulated by the symmetrical driven plates 7, and the cracks between the rock masses are simulated by the gaps between the symmetrical driven plates 7. The upper parts of both sides of the driven plates 7 are fixedly connected with elastic clamping plates 9, and a sealing belt 10 is clamped between the elastic clamping plates 9 and the driven plates 7. The sealing belt 10 is clamped and fixed to the outer wall of the driven plate 7 by the elastic clamping plates 9, so that the sealing belt 10 is tightly fitted to the side wall and the bottom of the driven plate 7, and the bottom of the driven plate 7 is tightly attached to the upper end surface of the fixed platform 11. The side walls and the bottom of the symmetrical driven plates 7 are blocked by the sealing belt 10, so as to avoid that when the gaps between the symmetrical driven plates 7 are filled with grouting material, part of the material leaks out from the sides of the gaps of the symmetrical driven plates 7.

[0031] See also Figure 4A symmetrical first guide groove 19 is provided in the middle of the side of the first connecting key 14 away from the cross key 13, and a second guide groove 35 is provided in the middle of the lower side of the second connecting key 15. The second guide groove 35 and the inner cavity of the first guide groove 19 are both slidably connected with a guide block 17, and the middle of the end of the guide block 17 away from the cross key 13 is fixedly connected with a rotating column 18. When the guide block 17 located in the inner cavity of the first guide groove 19 rotates in the vertical direction with the rotating column 18, the symmetrical guide blocks 17 will drive the cross key 13, the first connecting key 14 and the second connecting key 15 to rotate in the vertical direction. In this process, the guide block 17 located at the bottom slides along the second guide groove 35 without affecting the rotation of the cross key 13, so that the connecting plate 8 will move in the vertical direction with the connecting rod 12, and when the guide block 17 located in the inner cavity of the second guide groove 35 rotates with the rotating column 18, it will pass through the guide block 17 pushes the second guide groove 35 to rotate, thereby driving the first connecting key 14 and the cross key 13 to rotate in the horizontal direction. At this time, the first guide groove 19 slides with the symmetrical guide block 17 without hindering the rotation of the cross key 13, thereby facilitating driving the connecting plate 8 to rotate in the horizontal direction. The inner cavity side wall of the second guide groove 35 is elastically connected to the guide block 17 through a symmetrical spring. Through the cooperation of the spring and the guide block 17 located in the inner cavity of the second guide groove 35, the first connecting key 14 can be kept in a horizontal position, and it is also convenient for the first connecting key 14 to return to the horizontal position after rotating in the vertical direction. The two sides of the guide block 17 located in the inner cavity of the first guide groove 19 are elastically connected to the inner cavity side wall of the first guide groove 19 through a spring. Through the symmetrical springs, after the cross key 13, the first connecting key 14 and the second connecting key 15 rotate in the horizontal direction, they can be easily returned to the initial position through elastic force.

[0032] See also Figure 2 and Figure 4The side of the rotating column 18 away from the cross key 13 is fixedly connected with the driven gear 16, the side of the driven gear 16 away from the cross key 13 is meshed with a chain 21, and the side of the chain 21 away from the driven gear 16 is meshed with a driving gear 20, the driving gear 20 is rotatably connected to the inner cavity side wall of the movable plate 6, and the driving gear 20 and the driven gear 16 are only different in position, that is, when the driving gear 20 located at the top rotates, the driven gear 16 located at the top will be driven to rotate through the chain 21, thereby driving the second connecting key 15 to rotate in the vertical direction through the rotating column 18 and the guide block 17 located at the top, thereby driving the cross key 13 and the connecting rod 12 to drive the connecting plate 8 and the driven plate 7 in the vertical direction Rotate, so that the intervals between the symmetrical driven plates 7 are tilted in the vertical direction. When the driving gear 20 located below rotates, the driven gear 16 located below is driven to rotate synchronously through the chain 21 located below, so that the cross key 13 and the connecting rod 12 are driven to rotate in the horizontal direction through the cooperation of the guide block 17 located below and the second guide groove 35, thereby driving the connecting plate 8 and the driven plate 7 to rotate in the horizontal direction, so that the intervals between the symmetrical driven plates 7 are tilted in the horizontal direction. The machine can simulate rock cracks with different inclination angles through the rotation of the driven plate 7, so as to test the bonding strength of the grouting material to the dangerous rock mass under rock cracks with different inclination angles.

[0033] See also Figure 5 and Figure 6 A driven rack 22 is provided on the side of the driving gear 20 away from the chain 21. The driven rack 22 meshes with the driving gear 20. A notch 23 is provided in the middle of the driven rack 22. When the position of the notch 23 and the center position of the driving gear 20 are located in the same plane, the driven rack 22 loses the ability to drive and limit the driving gear 20. At this time, the driven rack 22 is separated from the driving gear 20, and the position state of the cross key 13 is no longer affected by the driven rack 22. Under the action of elastic force, the first connecting key 14, the second connecting key 15 and the cross key 13 are driven to return to the initial position, thereby driving the connecting plate 8 to return to the initial position through the connecting rod 12, and when the driven rack 22 moves horizontally again, the teeth of the driven rack 22 will be close to the teeth of the driving gear 20, thereby driving the driving gear 20 to rotate, and driving the cross key 13 to rotate.

[0034] See also Figure 7The driving mechanism includes a driving rod 30, which is movably connected to the side of the moving plate 6 away from the connecting plate 8. A cavity 33 is provided in the inner cavity of the moving plate 6 near the driving rod 30, that is, the driving rod 30 can rotate or move horizontally toward the inner cavity of the cavity 33. A fixed rod 29 is fixedly connected to the side of the inner cavity of the cavity 33 away from the driving rod 30. The outer wall of the fixed rod 29 is movably connected to the side wall of the driving rod 30. The inner cavity of the cavity 33 is slidably connected with a fixed rack 27. The end of the fixed rack 27 away from the moving plate 6 passes through the outer wall of the moving plate 6 and is fixedly connected to the inner cavity side wall of the fixed plate 5. The outer wall of the driving rod 30 is fixedly connected to a driving gear 28. The driving gear 28 will also move horizontally or rotate with the driving rod 30. When the driving gear 28 is located above the fixed rack 27, the rotation of the driving rod 30 will drive The dynamic driving gear 28 rotates synchronously, and the driving gear 28 is meshed with the fixed rack 27. When the driving gear 28 rotates, it will drive the movable plate 6 to synchronously move away from the position of the fixed platform 11, thereby driving the movable plate 6 to drive the connecting plate 8 and the driven plate 7 to synchronously move away from the position of the fixed platform 11, thereby increasing the interval between the symmetrical driven plates 7, thereby simulating cracks of different widths, and then quickly testing the bonding strength of the grouting to the dangerous rock mass under cracks of different widths. The bottom of the inner cavity of the cavity 33 is slidably connected with the first rack 25 and the second rack 26, respectively. The first rack 25 and the second rack 26 are symmetrical about the center position of the fixed rack 27. When the driving gear 28 is located above the first rack 25 or the second rack 26, it will drive the first rack 25 or the second rack 26 to move horizontally.

[0035] The center position of the driven rack 22 located at the bottom corresponds to the center position of the second rack 26, and the center position of the driven rack 22 located at the top corresponds to the center position of the first rack 25. The side of the driven rack 22 located at the top away from the driven gear 16 is fixedly connected with an extension rod 24, and the end of the extension rod 24 away from the driven rack 22 is fixedly connected to the center position of the first rack 25. When the driving gear 28 drives the first rack 25 to move horizontally, the first rack 25 will drive the driven rack 22 located at the top to move horizontally synchronously through the extension rod 24, thereby driving the driving gear 20 located at the top to rotate through the driven rack 22, and then driving the driven gear 16 located at the top to rotate in the vertical direction, thereby driving the cross key 13 to drive the connecting rod 12 and the connecting plate 8 rotates in the vertical direction, thereby achieving the effect of changing the angle of the simulated crack in the vertical direction. Similarly, when the driving gear 28 drives the second rack 26 to rotate, the driven plate 7 can be driven to rotate in the horizontal direction, thereby achieving the effect of changing the angle of the simulated crack in the horizontal direction. After the driving rod 30 and the driving gear 28 are moved horizontally, the driving gear 28 is driven to rotate by the driving rod 30, thereby driving the first rack 25 or the second rack 26 to rotate, thereby driving the driven plate 7 to rotate in the vertical direction or the horizontal direction. That is, by adjusting the position of the driving rod 30 and then rotating the driving rod 30, the moving plate 6 can be driven horizontally away from the fixed platform 11, thereby simulating rock cracks of different widths, and driving the driven plate 7 to rotate to simulate rock cracks of different inclination angles.

[0036] See also Figure 8 and Fig.10, three limiting grooves 32 are provided on one side of the inner cavity of the movable plate 6 close to the cavity 33, the spacing between the first rack 25 and the fixed rack 27 is the same as the spacing between the fixed rack 27 and the second rack 26, the spacing between two adjacent limiting grooves 32 is the same as the spacing between the first rack 25 and the fixed rack 27, the outer wall of the driving rod 30 is vertically slidably connected with a plurality of limiting rods 31, the lower end of the limiting rod 31 is elastically connected to the bottom of the inner cavity of the driving rod 30 by a spring, the upper end of the limiting rod 31 is slidably matched with the limiting groove 32, that is, the limiting rod 31 cooperates with the limiting groove 32 to elastically limit the driving rod 30 and the driving gear 28 in the horizontal direction, thereby preventing the driving rod 30 from moving in the horizontal direction during the rotation. When it is necessary to adjust the driving gear in the horizontal direction When the wheel 28 is in the position, the driving rod 30 is pushed and pulled so that the driving rod 30 drives the top of the limiting rod 31 to contact the side wall of the limiting rod 31. The top of the limiting rod 31 is spherical. When it contacts the side wall of the limiting groove 32, it will be squeezed and moved toward the inside of the driving rod 30, thereby disengaging from the limiting groove 32 and moving horizontally with the driving rod 30, and when it moves to the inner cavity of the adjacent limiting groove 32, it will pop out again, elastically limiting the driving rod 30 in the horizontal direction. By pushing and pulling the driving rod 30, the position of the driving gear 28 in the horizontal direction can be changed, so that the driving gear 28 can move in the horizontal direction, and then rotate with the first rack 25, the second rack 26 or the fixed rack 27 to achieve the effect of changing the angle of the driven plate 7 or driving the driven plate 7 to move horizontally.

[0037] See also Fig. 9 The first rack 25 and the second rack 26 are both slidably connected with a block 34 in the middle of one side away from the fixed rack 27. One end of the block 34 away from the fixed rack 27 is slidably connected to the lower part of the inner cavity side wall of the cavity 33. The inner cavity side wall of the cavity 33 is provided with a groove that slides with the block 34. The end of the block 34 away from the fixed rack 27 is elastically connected to the inner cavity side wall of the groove through a spring. The position of the block 34 and the center position of the driving gear 28 are located in the same vertical plane. When the driving gear 28 approaches the first rack 25 or the second rack 26, the lower middle part of the driving gear 28 will be in contact with the block 3 4 contacts the side close to the fixed rack 27, thereby pushing the block 34 to move toward the inner cavity of the groove, so that it is separated from the first rack 25 and loses the limiting effect on the first rack 25. At this time, the driving gear 28 rotates to drive the first rack 25 to move. When the driving gear 28 moves away from the first rack 25, the block 34 will approach the first rack 25 again and limit it in the horizontal direction, so that the angle of the driven plate 7 after rotation is fixed. Similarly, when the driving gear 28 approaches or moves away from the second rack 26, it will also push the block 34 close to the second rack 26 to move away from or close to the second rack 26.

[0038] See also Figure 1After the inclination angle and the interval width of the symmetrical driven plate 7 are adjusted, the grouting material can be filled into the interval, so that the symmetrical driven plates 7 are bonded together due to the grouting material. The middle part of the upper end of the base 1 is fixedly connected with a fixed bracket 2, and the middle part of the upper end of the fixed bracket 2 is transmission-connected with a first electric push rod, and the output end of the first electric push rod is fixedly connected with a shear tester 3 (a shear tester is a physical property testing instrument used in the fields of information science and system science, physics, basic disciplines of engineering and technology science, and materials science. It is a prior art to detect the shear strength of a material by a shear tester A commonly used technical means in the test), the shear tester 3 is driven by the first electric push rod to approach the symmetrical driven plate 7 filled with grouting material, so that the shear strength of the grouting material can be quickly detected by the shear tester 3, and a slide groove for sliding with the support plate 4 is opened in the middle of the upper end of the base 1, and a second electric push rod is connected to the side wall of the inner cavity of the slide groove and the lower part of the support plate 4. The support plate 4 is driven to move horizontally by the second electric push rod, thereby driving the symmetrical connecting plate 8 away from the driven plate 7 filled with grouting material, thereby avoiding the magnetic fixation of the connecting plate 8 to the driven plate 7 affecting the detection result.

Claims

1. A rapid detection device for the interface shear strength of sandstone cave grouting materials, comprising a base, characterized in that: The middle part of the upper end of the base is fixedly connected to a fixed platform, the middle part of the upper end of the base is slidably connected to a symmetrical supporting plate, the upper part of one end of the supporting plate close to the fixed platform is fixedly connected to a fixed plate, the middle part of one end of the fixed plate away from the supporting plate is slidably connected to a movable plate, the end of the movable plate away from the fixed plate is movably connected to a connecting plate, a steering mechanism for adjusting the angle of the connecting plate is provided in the middle part of one side of the movable plate close to the connecting plate, and a driving mechanism for driving the steering mechanism to rotate is provided on one side of the inner cavity of the movable plate close to the fixed plate, and when the outer wall of the driving mechanism rotates, the steering mechanism rotates in the horizontal direction.

2. The device for rapid detection of interfacial shear strength of sandstone cave grouting materials according to claim 1 is characterized in that: The steering mechanism includes a cross key, a first connecting key is fixedly connected to the middle outer wall of the cross key, a second connecting key is fixedly connected to the middle of the lower end of the cross key, both sides of the upper end of the second connecting key are fixedly connected to the lower end of the first connecting key, the upper end of the cross key is fixedly connected to a connecting rod near the upper end of the fixed platform, the end of the connecting rod away from the cross key is fixedly connected to the middle of the connecting plate, the end of the connecting plate away from the connecting rod is magnetically connected to a driven plate, the upper parts of both sides of the driven plate are fixedly connected to elastic clamping plates, and a sealing belt is clamped between the elastic clamping plate and the driven plate.

3. The device for rapid detection of interfacial shear strength of sandstone cave grouting materials according to claim 2 is characterized in that: A symmetrical first guide groove is provided in the middle of the side of the first connecting key away from the cross key, and a second guide groove is provided in the middle of the lower side of the second connecting key. Guide blocks are slidably connected to the inner cavities of the second guide groove and the first guide groove, and a rotating column is fixedly connected to the middle of one end of the guide block away from the cross key.

4. The device for rapid detection of interfacial shear strength of sandstone cave grouting materials according to claim 3 is characterized in that: A driven gear is fixedly connected to the side of the rotating column away from the cross key, a chain is meshed with the side of the driven gear away from the cross key, a driving gear is meshed with the side of the chain away from the driven gear, the driving gear is rotatably connected to the inner cavity side wall of the movable plate, a driven rack is provided on the side of the driving gear away from the chain, the driven rack is meshed with the driving gear, and a notch is provided in the middle of the driven rack.

5. The device for rapid detection of interfacial shear strength of sandstone cave grouting materials according to claim 4 is characterized in that: The driving mechanism includes a driving rod, which is movably connected to a side of the movable plate away from the connecting plate, a cavity is opened in the inner cavity of the movable plate near the driving rod, a fixed rod is fixedly connected to the side of the inner cavity away from the driving rod, the outer wall of the fixed rod is movably connected to the side wall of the driving rod, a fixed rack is slidably connected to the inner cavity of the cavity, and an end of the fixed rack away from the movable plate passes through the outer wall of the movable plate and is fixedly connected to the side wall of the inner cavity of the fixed plate.

6. The device for rapid detection of interfacial shear strength of sandstone cave grouting materials according to claim 5, characterized in that: The outer wall of the driving rod is fixedly connected to a driving gear, and the bottom of the inner cavity of the cavity is slidably connected to a first rack and a second rack respectively. The first rack and the second rack are symmetrical about the center position of the fixed rack, and the first rack, the second rack and the fixed rack are all meshed with the driving gear.

7. The device for rapid detection of interfacial shear strength of sandstone cave grouting materials according to claim 6, characterized in that: The center position of the driven rack away from the fixed rod corresponds to the center position of the second rack, the center position of the driven rack close to the fixed rod corresponds to the center position of the first rack, and the driven rack close to the fixed rod is fixedly connected to an extension rod on one side away from the driven gear, and one end of the extension rod away from the driven rack is fixedly connected to the center position of the first rack.

8. The device for rapid detection of interfacial shear strength of sandstone cave grouting materials according to claim 6, characterized in that: Three limit grooves are provided on one side of the inner cavity of the movable plate close to the cavity, the spacing between the first rack and the fixed rack is the same as the spacing between the fixed rack and the second rack, the spacing between two adjacent limit grooves is the same as the spacing between the first rack and the fixed rack, and the outer wall of the driving rod is vertically slidably connected with a plurality of limit rods, and the upper ends of the limit rods are slidably matched with the limit grooves.

9. The device for rapid detection of interfacial shear strength of sandstone cave grouting materials according to claim 8, characterized in that: A blocking block is slidably engaged with the first rack and the second rack in the middle of one side away from the fixed rack, and one end of the blocking block away from the fixed rack is slidably connected to the lower part of the inner cavity side wall of the cavity, and a groove is provided on the inner cavity side wall of the cavity for sliding cooperation with the blocking block, and the position of the blocking block and the center position of the driving gear are located in the same vertical plane.

10. The device for rapid detection of interfacial shear strength of sandstone cave grouting materials according to claim 1, characterized in that: A fixed bracket is fixedly connected to the middle part of the upper end of the base, and a first electric push rod is transmission-connected to the middle part of the upper end of the fixed bracket. A shear tester is fixedly connected to the output end of the first electric push rod. A sliding groove for cooperating with the sliding of the support plate is provided in the middle part of the upper end of the base, and a second electric push rod is transmission-connected between the side wall of the inner cavity of the sliding groove and the lower part of the support plate.

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