A landslide warning extensometer with strong anti-interference performance

Abstract

The present invention relates to the technical field of geological monitoring and early warning, and particularly to a landslide early warning extensometer with strong anti-interference performance. Aiming at the problems of poor anti-interference ability and lack of stability of the existing early warning extensometers, the following solutions are proposed. It includes: a first mounting frame, which includes a top plate and a plurality of first insertion rods fixed to the bottom surface of the top plate. An extensometer body is installed on the top surface of the top plate. The extensometer body includes a chassis installed on the top surface of the top plate and a speaker installed on the top of the chassis; a second mounting frame, which includes a connecting plate and a plurality of second insertion rods fixed to the bottom surface of the connecting plate. One end of the steel tape extended from the chassis is fixed to the connecting plate through a first fixing plate. The present invention can not only provide good protection for the extensometer, but also open the protective cover in time when the crack size exceeds the safety value. At the same time, it can gradually reinforce the second mounting frame while the crack increases.

Description

Technical Field

[0001] The present invention relates to the field of geological monitoring and early warning, and particularly relates to a landslide warning extensometer with strong anti-interference performance. Background Art

[0002] At present, during the monitoring of slope geological disasters, a landslide warning extensometer is often used. The main working principle of the landslide warning extensometer is to monitor the change of slope fissures. By installing an extensometer on one side of the slope fissure, then installing a fixing frame on the other side of the fissure, then setting the safe length of the steel tape in the extensometer, and then fixing one end of the steel tape on the fixing frame. When the size of the fissure increases, the steel tape is stretched. When it exceeds the set safe length of the steel tape, it means that the length of the fissure exceeds the safe value, and then the loudspeaker of the extensometer will emit an alarm sound to give a reminder.

[0003] Most of the existing landslide warning extensometers are installed outdoors on slopes, with poor anti-interference ability. Long-term exposure to wind, sun, and rain will cause certain damage to the extensometer, resulting in its malfunction. Moreover, when the slope fissure increases, the soil will become loose, which is also very likely to cause the installation frame for installing the extensometer to become loose, thus affecting the monitoring results. Therefore, this solution proposes a landslide warning extensometer with strong anti-interference performance. Summary of the Invention

[0004] A landslide warning extensometer with strong anti-interference performance proposed by the present invention solves the problems of poor anti-interference ability and lack of stability of the warning extensometer in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A landslide warning extensometer with strong anti-interference performance, comprising:

[0007] A first mounting frame, which includes a top plate and a plurality of first insertion rods fixed to the bottom surface of the top plate. An extensometer body is installed on the top surface of the top plate. The extensometer body includes a chassis installed on the top surface of the top plate and a loudspeaker installed on the top of the chassis;

[0008] A second mounting frame, which includes a connecting plate and a plurality of second insertion rods fixed to the bottom surface of the connecting plate. One end of the steel tape extended from the chassis is fixed to the connecting plate through a first fixing plate. A second mounting plate is fixed between the plurality of second insertion rods. A third screw rod is threadedly connected to the second mounting plate and is arranged along the length direction of the second insertion rod. A fixing sleeve that can move along its axial direction is movably sleeved on the outer periphery of the third screw rod, and the bottom of the fixing sleeve is rotatably connected to the top surface of the second mounting plate. A first rope pulley is sleeved on the outer periphery of the fixing sleeve. A first pulling rope is wound around the outer periphery of the first rope pulley, and the other end of the first pulling rope is fixedly connected to the top plate through a second fixing plate;

[0009] A protective mechanism, which includes a protective cover covering the outside of the extensometer and a locking member installed on the top surface of the top plate. One side of the protective cover is connected to the top surface of the top plate through a reset member. A wire groove for the steel tape to pass through is provided on the side of the protective cover facing the reset member, and this side of the protective cover is clamped with the locking member;

[0010] An adjusting mechanism, which is installed between the first mounting bracket and the second mounting bracket and is used to unlock the locking member to open the protective cover when the stretching length of the steel tape exceeds a set value.

[0011] Through the above technical solutions, not only can the extensometer be well protected, but also the protective cover can be opened in time when the crack size exceeds the safety value, and at the same time, the second mounting bracket can be gradually reinforced while the crack increases.

[0012] As a further improvement of the above solution, the reset member includes two fixing blocks fixed on the top surface of the top plate and a rotating shaft arranged between the two fixing blocks. Installation holes are provided on the opposite sides of the two fixing blocks. The two ends of the rotating shaft respectively extend into the two installation holes and are rotatably connected thereto. A torsion spring is installed between one end of the rotating shaft located in the installation hole and the installation hole. The rotating shaft is fixed at the bottom of one side of the protective cover.

[0013] Through the above technical solutions, the protective cover can be automatically opened after the locking member is unlocked.

[0014] As a further improvement of the above solution, the locking member includes an adjusting plate slidably connected to the top surface of the top plate and a plurality of clamping members installed on the outer wall of the adjusting plate close to the protective cover. A plurality of receiving grooves for installing the clamping members are provided on the outer wall of the adjusting plate close to the protective cover. The clamping member includes an elastic column movably arranged in the receiving groove and a spring fixed at one end of the elastic column. The other end of the spring is fixed on the inner wall of the receiving groove. The other end of the elastic column is a right triangle structure and extends outside the receiving groove, and the inclined surface of the elastic column faces upward. A clamping hole matching the elastic column is provided on the outer wall of the side of the protective cover where the wire groove is provided.

[0015] Through the above technical solutions, the closed protective cover can be conveniently locked.

[0016] As a further improvement of the above solution, the adjusting mechanism includes a fixed shaft rotatably connected to the top plate, a second rope pulley fixed on the top of the fixed shaft, a second screw rod installed on the bottom surface of the top plate, and a moving plate threadedly sleeved on the outer periphery of the second screw rod. A connecting groove is provided on the top surface of the top plate along the length direction of the second screw rod. The top of the moving plate penetrates through the connecting groove and is fixedly connected to the bottom surface of the adjusting plate. One end of the second screw rod is drivingly connected to the bottom of the fixed shaft. A second pulling rope is wound around the outer periphery of the second rope pulley, and the other end of the second pulling rope is fixed on the first fixing plate.

[0017] Through the above technical solution, it is possible to automatically drive the lifting mechanism to unlock the locking member when the crack size exceeds the safety value, so as to open the protective cover.

[0018] As a further improvement of the above solution, the long sides of both sides of the moving plate are respectively abutted against the long sides of both sides of the connecting groove, and the length of the adjusting plate is greater than the width of the connecting groove.

[0019] Through the above technical solution, it is possible to avoid the moving plate from shaking when moving in the connecting groove.

[0020] As a further improvement of the above solution, a reinforcement mechanism is installed on the bottom surface of the top plate, and the reinforcement mechanism is in transmission connection with the second screw through a transmission shaft.

[0021] Through the above technical solution, it is possible to automatically reinforce the first mounting bracket while the second screw rotates.

[0022] As a further improvement of the above solution, the reinforcement mechanism includes a first mounting plate fixed between a plurality of first insertion rods, a first screw threadedly connected to the first mounting plate, and a fixed cylinder rotatably connected to the bottom surface of the top plate. The top of the first screw extends into the fixed cylinder, and a limiting block is fixed on the outer periphery of one end of the first screw located in the fixed cylinder. A limiting groove is provided on the inner wall of the fixed cylinder along its axial direction, and one end of the limiting block extends into the limiting groove and is slidably connected thereto. One end of the transmission shaft is in transmission connection with the fixed cylinder.

[0023] Through the above technical solution, it is possible to drive the first screw to descend while rotating by the rotation of the transmission shaft.

[0024] As a further improvement of the above solution, a chute is provided on the outer periphery of the third screw along its axial direction, and a slider is fixed on the inner wall of the fixed sleeve. One end of the slider extends into the chute and is slidably connected thereto.

[0025] Through the above technical solution, it is ensured that the third screw can move downward while rotating.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] 1. Through the cooperation between the first mounting bracket, the second mounting bracket, the second mounting plate, the third screw, the fixed sleeve, the first rope pulley and the first pulling rope, it is possible to drive the third screw to rotate while the distance between the first mounting bracket and the second mounting bracket becomes larger, so that the third screw descends while rotating, so that the third screw is inserted deeper into the soil, so that the second fixing bracket can be more stable, and further ensure the normal operation of the extensometer, and solve the problem of its poor stability.

[0028] 2. Through the cooperation between the protection mechanism and the adjustment mechanism, the protective cover can be automatically opened when the steel tape is stretched beyond the limit value, so that the alarm sound emitted by the speaker will not be covered. Under normal circumstances, the protective cover is in a closed state, which can protect the extensometer from wind and rain, help ensure its long-term normal operation, and solve the problem of poor anti-interference ability.

[0029] 3. Through the cooperation between the reinforcement mechanism and the adjustment mechanism, when the distance between the first fixing frame and the second fixing frame becomes larger, the first screw rod can be driven to insert deep into the soil, thereby effectively ensuring the stability of the first mounting frame. Brief Description of the Drawings

[0030] Figure 1 is the front elevation sectional view of the present invention;

[0031] Figure 2 is Figure 1 the enlarged view of part A in

[0032] Figure 3 the structural schematic diagram when the protective cover is closed;

[0033] Figure 4 the structural schematic diagram when the protective cover is opened;

[0034] Figure 5 is the structural schematic diagram of the fixed cylinder and the first screw rod.

[0035] Main Symbol Explanation:

[0036] 1. Top plate; 2. First insertion rod; 3. Protective cover; 4. Rotating shaft; 5. Chassis; 6. Speaker; 7. Steel tape; 8. First pulling rope; 9. Second pulling rope; 10. First mounting plate; 11. First screw rod; 12. Fixed cylinder; 13. Transmission shaft; 14. Second screw rod; 15. First fixing plate; 16. Connecting plate; 17. Slide groove; 18. Second insertion rod; 19. Second mounting plate; 20. Fixed sleeve; 21. First rope pulley; 22. Second fixing plate; 23. Connecting groove; 24. Adjusting plate; 25. Storage groove; 26. Elastic column; 27. Moving plate; 28. Fixed shaft; 29. Second rope pulley; 30. Wire groove; 31. Fixed block; 32. Card hole; 33. Limit groove; 34. Limit block; 35. Third screw rod. Detailed Embodiment

[0037] Next, in combination with the drawings and specific embodiments, the present invention will be further described. It should be noted that on the premise of no conflict, the following described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0038] Embodiment 1:

[0039] Please combine with Figure 1 , a landslide warning extensometer with strong anti-interference performance in this embodiment, includes:

[0040] The first mounting bracket, which includes a top plate 1 and a plurality of first inserting rods 2 fixed to the bottom surface of the top plate 1. The top surface of the top plate 1 is provided with an extensometer body. The extensometer body includes a chassis 5 mounted on the top surface of the top plate 1 and a speaker 6 mounted on the top of the chassis 5. A steel ruler 7 is provided on the chassis 5. By setting the safe length of the steel ruler 7, when the stretching length of the steel ruler 7 exceeds the set value, the speaker 6 starts to alarm, indicating that the crack width on the landslide exceeds the safe value.

[0041] The second mounting bracket, which includes a connecting plate 16 and a plurality of second inserting rods 18 fixed to the bottom surface of the connecting plate 16. One end of the steel ruler 7 stretched out from the chassis 5 is fixed to the connecting plate 16 through a first fixing plate 15. A plurality of fixing rings are fixed on the first fixing plate 15. When installing the extensometer, the first mounting bracket and the second mounting bracket are respectively installed on both sides of the gap on the slope, and then one end of the steel ruler 7 is tied to a fixing ring on the connecting plate 16. When the gap becomes larger, the steel ruler 7 will stretch outwards from the inside of the chassis 5. When the stretching length of the steel ruler 7 exceeds the set value, the speaker 6 starts to alarm.

[0042] A second mounting plate 19 is fixed between the plurality of second inserting rods 18. A third screw rod 35 arranged along the length direction of the second inserting rods 18 is threadedly connected to the second mounting plate 19. A fixing sleeve 20 that can move along its axial direction is movably sleeved on the outer periphery of the third screw rod 35, and the bottom of the fixing sleeve 20 is rotatably connected to the top surface of the second mounting plate 19. A first rope pulley 21 is sleeved on the outer periphery of the fixing sleeve 20. A first pulling rope 8 is wound around the outer periphery of the first rope pulley 21, and the other end of the first pulling rope 8 is fixedly connected to the top plate 1 through a second fixing plate 22. A chute 17 arranged along the axial direction of the third screw rod 35 is opened on the outer periphery of the third screw rod 35. A slider is fixed on the inner wall of the fixing sleeve 20, and one end of the slider extends into the chute 17 and is slidably connected thereto. When the slope crack becomes larger, the distance between the first mounting bracket and the second mounting bracket becomes larger. At this time, the first pulling rope 8 unfolds from the first rope pulley 21 under the action of the pulling force, thereby driving the first rope pulley 21 to rotate. While the first rope pulley 21 rotates, it drives the fixing sleeve 20 to rotate. The rotation of the fixing sleeve 20 drives the third screw rod 35 to rotate, and the third screw rod 35 is threadedly connected to the second mounting plate 19, so that the third screw rod 35 moves downward while rotating, and then can be inserted deeper into the soil, making the second mounting bracket more firmly fixed on the slope when the slope crack becomes larger, effectively avoiding the loosening of the second mounting bracket caused by the soil layer change due to the increase of the crack, thereby ensuring that the extensometer can work normally.

[0043] Protective mechanism, which includes a protective cover 3 covering the outside of the extensometer and a locking member installed on the top surface of the top plate 1. One side of the protective cover 3 is connected to the top surface of the top plate 1 through a reset member. A wire groove 30 for the steel tape 7 to pass through is provided on the side of the protective cover 3 facing the reset member, and this side of the protective cover 3 is clamped with the locking member. The reset member includes two fixing blocks 31 fixed on the top surface of the top plate 1 and a rotating shaft 4 arranged between the two fixing blocks 31. Installation holes are provided on the opposite sides of the two fixing blocks 31. The two ends of the rotating shaft 4 respectively extend into the two installation holes and are rotatably connected thereto. A torsion spring is installed between one end of the rotating shaft 4 located in the installation hole and the installation hole. The rotating shaft 4 is fixed at the bottom of one side of the protective cover 3. The locking member includes an adjusting plate 24 slidably connected to the top surface of the top plate 1 and a plurality of clamping members installed on the outer wall of the adjusting plate 24 close to the protective cover 3. A plurality of receiving grooves 25 for installing the clamping members are provided on the outer wall of the adjusting plate 24 close to the protective cover 3. The clamping member includes an elastic column 26 movably arranged in the receiving groove 25 and a spring fixed at one end of the elastic column 26. The other end of the spring is fixed on the inner wall of the receiving groove 25. The other end of the elastic column 26 is a right triangle structure and extends outside the receiving groove 25, and the inclined surface of the elastic column 26 faces upward. A clamping hole 32 matching the elastic column 26 is provided on the outer wall of the side of the protective cover 3 where the wire groove 30 is provided. When the protective cover 3 is closed, it can protect the extensometer, preventing it from being exposed to wind, sun, rain, etc., thereby effectively extending its service life. When the protective cover 3 is closed, the torsion spring is in a compressed state, one end of the elastic column 26 is clamped in the clamping hole 32, and the spring is also in a compressed state. When the elastic column 26 exits from the clamping hole 32, then under the action of the torsion spring, the protective cover 3 will automatically pop open, so that the alarm sound emitted by the speaker 6 will not be covered by the protective cover 3.

[0044] Adjusting mechanism, which is installed between the first mounting bracket and the second mounting bracket and is used to unlock the locking member to open the protective cover 3 when the stretching length of the steel ruler 7 exceeds the set value. The adjusting mechanism includes a fixed shaft 28 rotatably connected to the top plate 1, a second rope pulley 29 fixed to the top of the fixed shaft 28, a second screw rod 14 installed on the bottom surface of the top plate 1, and a moving plate 27 threadedly sleeved on the outer periphery of the second screw rod 14. A connecting groove 23 is provided on the top surface of the top plate 1 along the length direction of the second screw rod 14. The top of the moving plate 27 penetrates through the connecting groove 23 and is fixedly connected to the bottom surface of the adjusting plate 24. The two long sides of the moving plate 27 are respectively in contact with the two long sides of the connecting groove 23. The length of the adjusting plate 24 is greater than the width of the connecting groove 23. One end of the second screw rod 14 is fixed with a first driven bevel gear, and the bottom of the fixed shaft 28 is fixed with a first driving bevel gear meshing with the first driven bevel gear. A second pulling rope 9 is wound around the outer periphery of the second rope pulley 29. The other end of the second pulling rope 9 is fixed to the first fixing plate 15. A fixing ring is also fixed on the first fixing plate 15 for fixing the second pulling rope 9. When the distance between the first mounting bracket and the second mounting bracket becomes larger, the second pulling rope 9 is pulled. When pulling the second pulling rope 9, it will cause the second pulling rope 9 to drive the second rope pulley 29 to rotate. After the second rope pulley 29 rotates, it will drive the second screw rod 14 to rotate. After the second screw rod 14 rotates, it can drive the moving plate 27 to move to the side away from the protective cover 3. While the moving plate 27 moves, it drives the adjusting plate 24 to move synchronously. Since the spring has a deformation process, the elastic column 26 will not immediately move synchronously with it after the moving plate 27 moves, but will move following the movement of the adjusting plate 24 after the spring completely recovers its deformation. Thus, when the size of the crack does not exceed the safety value, the elastic column 26 will not withdraw from the card hole 32, so that the protective cover 3 will not open when the size of the crack does not reach the set value.

[0045] The implementation principle of this embodiment is as follows: When installing the extensometer, the first mounting bracket and the second mounting bracket are respectively installed on both sides of the gap on the slope, then the safe length of the steel ruler 7 is set, and then one end of the steel ruler 7 is tied to a fixing ring on the connecting member 16. Subsequently, the protective cover 3 is closed and clamped by the locking member;

[0046] When the gap becomes larger, the steel ruler 7 will stretch outwards from the inside of the machine box 5, and the distance between the first mounting bracket and the second mounting bracket will also increase accordingly. When the stretching length of the steel ruler 7 exceeds the set value, the speaker 6 starts to alarm;

[0047] While the distance between the first mounting bracket and the second mounting bracket increases, the first pulling rope 8 unfolds from the first rope pulley 21 under the action of the pulling force, thereby driving the first rope pulley 21 to rotate. While the first rope pulley 21 rotates, it drives the fixed sleeve 20 to rotate. The rotation of the fixed sleeve 20 drives the third screw rod 35 to rotate. Since the third screw rod 35 is threadedly connected to the second mounting plate 19, the third screw rod 35 moves downward while rotating, and can thus be inserted deeper into the soil, making the second mounting bracket more firmly fixed on the slope when the slope crack becomes larger;

[0048] At the same time, the second pulling rope 9 also drives the second rope pulley 29 to rotate. After the second rope pulley 29 rotates, it drives the second screw rod 14 to rotate. After the second screw rod 14 rotates, it can drive the moving plate 27 to move away from the protective cover 3. When the end of the elastic column 26 located in the card hole 32 completely exits outside the card hole, the protective cover 3 will be bounced open under the action of the torsion spring.

[0049] Embodiment 2:

[0050] Combined with Figure 1 、 Figure 2 and Figure 5 Based on Embodiment 1, a further improvement in this embodiment is that a reinforcement mechanism is installed on the bottom surface of the top plate 1. The reinforcement mechanism is drivingly connected to the second screw rod 14 through a transmission shaft 13. The reinforcement mechanism includes a first mounting plate 10 fixed between a plurality of first insertion rods 2, a first screw rod 11 threadedly connected to the first mounting plate 10, and a fixed cylinder 12 rotatably connected to the bottom surface of the top plate 1. The top of the first screw rod 11 extends into the fixed cylinder 12. A limiting block 34 is fixed on the outer periphery of the end of the first screw rod 11 located in the fixed cylinder 12. A limiting groove 33 is provided on the inner wall of the fixed cylinder 12 along its axial direction. One end of the limiting block 34 extends into the limiting groove 33 and is slidably connected thereto. The transmission shaft 13 is installed on the bottom surface of the top plate 1, and one end of the transmission shaft 13 is fixedly connected to the other end of the second screw rod 14. A second driving bevel gear is fixed to the other end of the transmission shaft 13. A second driven bevel gear meshing with the first driving bevel gear is sleeved on the outer periphery of the fixed cylinder 12. When the fixed cylinder 12 rotates, it drives the first screw rod 11 to rotate synchronously. After the first screw rod 11 rotates, it will descend relative to the first mounting plate 10.

[0051] The implementation principle of this embodiment is as follows: When the second screw rod 14 rotates, it drives the transmission shaft 13 to rotate synchronously. After the transmission shaft 13 rotates, it drives the fixed cylinder 12 to rotate. The rotation of the fixed cylinder 12 drives the second screw rod 14 to rotate. While the second screw rod 14 rotates, it descends relative to the first mounting plate 10. Thus, when the slope crack becomes larger, the second screw rod 14 will be inserted deeper into the soil, making the first mounting bracket more firmly fixed on the slope.

[0052] The above embodiments are only preferred embodiments of the present invention, and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection required by the present invention.

Claims

1. A landslide early warning extensometer with strong anti-interference performance, characterized in that: include: A first mounting frame, comprising a top plate and a plurality of first plugging rods fixed to the bottom surface of the top plate, a telescope body being mounted on the top surface of the top plate, the telescope body comprising a chassis mounted on the top surface of the top plate and a speaker mounted on the top of the chassis; The second mounting frame comprises a connecting plate and a plurality of second plug rods fixed to the bottom surface of the connecting plate, one end of the steel ruler stretched out from the chassis is fixed to the connecting plate through the first fixing plate, a second mounting plate is fixed between the plurality of second plug rods, a third screw rod arranged along the length direction of the second plug rod is threadedly connected to the second mounting plate, a fixing sleeve movable along its axial direction is movably sleeved on the outer periphery of the third screw rod, and the bottom of the fixing sleeve is rotatably connected to the top surface of the second mounting plate, a first rope wheel is sleeved on the outer periphery of the fixing sleeve, a first pull rope is wound around the outer periphery of the first rope wheel, and the other end of the first pull rope is fixedly connected to the top plate through the second fixing plate; The protection mechanism includes a protection cover arranged outside the machine telescopic instrument and a locking piece installed on the top surface of the top plate, one side of the protection cover is connected to the top surface of the top plate through a reset piece, a wire groove for a steel ruler to pass through is provided on the side of the protection cover facing the reset piece, and the side of the protection cover is engaged with the locking piece; An adjustment mechanism, which is installed between the first mounting frame and the second mounting frame and is used to unlock the locking piece to open the protective cover when the stretched length of the steel ruler exceeds a set value; The adjusting mechanism comprises a fixed shaft rotatably connected to the top plate, a second rope pulley fixed to the top of the fixed shaft, a second screw rod installed on the bottom surface of the top plate, and a movable plate threadedly sleeved on the outer periphery of the second screw rod, the top surface of the top plate is provided with a connecting groove arranged along the length direction of the second screw rod, the top of the movable plate passes through the connecting groove and is fixedly connected to the bottom surface of the adjusting plate, one end of the second screw rod is transmission-connected to the bottom of the fixed shaft, a second pull rope is wound around the outer periphery of the second rope pulley, and the other end of the second pull rope is fixed to the first fixed plate; The locking member includes an adjustment plate slidably connected to the top surface of the top plate and a plurality of clips installed on the outer wall of the adjustment plate on one side close to the protective cover. A plurality of receiving grooves for installing the clips are provided on the outer wall of the adjustment plate on one side close to the protective cover. The clips include an elastic column movably arranged in the receiving groove and a spring fixed to one end of the elastic column, the other end of the spring is fixed to the inner wall of the receiving groove, the other end of the elastic column is a right-angled triangle structure and extends to the outside of the receiving groove, and the inclined surface of the elastic column is arranged upward, and a clip hole matching the elastic column is provided on the outer wall of the protective cover on the side where the wire groove is provided.

2. A landslide early warning extensometer with strong anti-interference performance according to claim 1, characterized in that: The reset member includes two fixed blocks fixed on the top surface of the top plate and a rotating shaft arranged between the two fixed blocks. Mounting holes are opened on the opposite sides of the two fixed blocks. Both ends of the rotating shaft extend into the two mounting holes respectively and are rotatably connected thereto. A torsion spring is installed between one end of the rotating shaft located in the mounting hole and the mounting hole. The rotating shaft is fixed to the bottom of one side of the protective cover.

3. The landslide early warning extensometer with strong anti-interference performance according to claim 1 is characterized in that: The two long sides of the movable plate are respectively in contact with the two long sides of the connecting groove, and the length of the adjusting plate is greater than the width of the connecting groove.

4. The landslide early warning extensometer with strong anti-interference performance according to claim 1, characterized in that: A reinforcement mechanism is installed on the bottom surface of the top plate, and the reinforcement mechanism is transmission-connected to the second screw rod through a transmission shaft.

5. The landslide early warning extensometer with strong anti-interference performance according to claim 4, characterized in that: The reinforcement mechanism includes a first mounting plate fixed between multiple first insertion rods, a first screw threadedly connected to the first mounting plate, and a fixed cylinder rotatably connected to the bottom surface of the top plate, the top of the first screw extends into the fixed cylinder, the outer periphery of one end of the first screw located in the fixed cylinder is fixed with a limiting block, the inner wall of the fixed cylinder is provided with a limiting groove arranged along its axial direction, one end of the limiting block extends into the limiting groove and is slidably connected thereto, and one end of the transmission shaft is transmission-connected to the fixed cylinder.

6. The landslide early warning extensometer with strong anti-interference performance according to claim 1, characterized in that: The outer periphery of the third screw rod is provided with a sliding groove arranged along the axial direction thereof, and a sliding block is fixed on the inner wall of the fixed sleeve, and one end of the sliding block extends into the sliding groove and is slidably connected therewith.

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