A geological disaster detection and early warning device

By designing movable mounting plates and drive components in the geological disaster detection and early warning device, the installation and disassembly of fixed plates is simplified, the problem of cumbersome disassembly of existing devices is solved, and the convenience of maintenance and maintenance and the practicality of the device is improved.

CN222734534UActive Publication Date: 2025-04-08SHAANXI BINCHANG DAFOSI MINING CO LTD
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Patent Information

Application Number
CN202421435100.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-22
Publication Date
2025-04-08
Estimated Expiration
2034-06-22

AI Technical Summary

Technical Problem

The existing geological disaster detection and early warning devices are cumbersome during disassembly and installation, which affects the maintenance and maintenance of early warning devices by staff and is poor in practicality.

Method used

A geological disaster detection and early warning device is designed, using movable mounting plates and driving components. The driving components drive the moving plates away or close to each other, thereby realizing the movement of the plug plates and the plug rods, simplifying the installation and disassembly of the fixing plates on the mounting plates.

Benefits of technology

In actual use of this device, staff can disassemble and install the fixing plate more conveniently, which significantly improves the convenience of maintenance and maintenance of the early warning body and improves the practicality of the device.

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Abstract

The utility model relates to the technical field of disaster detection and early warning devices, and discloses a geological disaster detection and early warning device, including a base and a fixed plate, the fixed plate is provided with an early warning device body, the side wall of the fixed plate is provided with a plurality of plug holes, the base is provided with a support rod, the support rod is provided with a mounting plate, the upper end surface of the mounting plate is provided with a plug plate, the side walls of the plug plate are provided with plug rods, a mounting cavity is provided in the mounting plate, the upper end surface of the mounting plate is provided with a mounting groove, a movable plate is provided in the mounting cavity, a movable plate is provided on the movable plate, the extended end of the movable rod is connected to the corresponding plug plate, a mounting assembly is provided in the mounting cavity, and a driving assembly is also provided in the mounting cavity. Through the above-mentioned structure, the two movable plates are driven away from each other by the driving assembly, so that the plug rod on the plug plate can slide out of the plug hole, and the installation of the fixed plate on the mounting plate is released, so that it is convenient for the staff to inspect and maintain the early warning device body on the fixed plate, and the practicality is good.
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Description

Technical Field

[0001] The utility model relates to the technical field of disaster detection and early warning devices, in particular to a geological disaster detection and early warning device. Background Art

[0002] Geological disasters include earthquakes, landslides and mud-rock flows, which are formed by natural or human factors. In order to reduce the loss of human life and property caused by geological disasters, it is necessary to monitor and warn them. After the existing geological disaster detection and early warning devices are installed on the ground, staff are required to regularly inspect and maintain the geological disaster detection and early warning devices to avoid abnormal conditions of the geological disaster detection and early warning devices after long-term use, resulting in the geological disaster detection and early warning devices being unable to monitor and warn geological disasters.

[0003] For example, a geological disaster monitoring and early warning device disclosed in the patent with announcement number CN218630992U, although this geological disaster monitoring and early warning device has the advantage of being able to support the early warning device, increase the stability of the early warning device, and thus reduce the possibility of the early warning device tipping over; however, when this geological disaster monitoring and early warning device is actually used, the staff needs to turn out the limit bolts from the limit holes in turn before the early warning device can be removed from the mounting plate, and then, the early warning device can be inspected and maintained. After the inspection and maintenance of the early warning device is completed, one end of the limit bolt needs to be passed through the protective cover, and one end of the limit bolt needs to be threaded into the corresponding limit hole before the early warning device can be installed on the mounting plate, resulting in cumbersome disassembly and assembly of the early warning device on the mounting plate, which makes it inconvenient for the staff to inspect and maintain the early warning device, and has poor practicality in actual use. Utility Model Content

[0004] The purpose of the utility model is to provide a geological disaster detection and early warning device to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A geological disaster detection and early warning device comprises a base and a fixed plate, wherein an early warning device body is arranged on the fixed plate, a plurality of sockets are arranged on the opposite side walls of the fixed plate, a support rod is arranged on the base, a mounting plate for placing the fixed plate is arranged on the support rod, a relative plug plate is arranged on the upper end surface of the mounting plate, a plurality of plug rods are arranged on the opposite side walls of the plug plate, a mounting cavity is arranged in the mounting plate, a plurality of relative mounting grooves are arranged on the upper end surface of the mounting plate, a relative and movable moving plate is arranged in the mounting cavity, a plurality of moving rods are arranged on the upper end surface of the moving plate, one end of the moving rods extends out of the corresponding mounting groove, the extending end of the moving rod is connected to the corresponding plug plate, a mounting component for driving two moving plates to approach each other and inserting the plug rods on the plug plate into the corresponding sockets is arranged in the mounting cavity, and a driving component for driving two moving plates to move away from each other and slide the plug plate out of the corresponding sockets is also arranged in the mounting cavity.

[0007] Preferably, a through rod with one end penetrating the movable plate is provided on the opposite side walls of the installation cavity and at both ends of the movable plate, and a through ring is provided at the end where the through rod passes through the movable plate;

[0008] The mounting assembly comprises a first spring sleeved on the penetration rod, and the first spring is used for pushing the moving plate to approach the penetration ring, so as to achieve the mutual approach of the two moving plates.

[0009] Preferably, a rotatable gear is provided on the bottom wall of the installation cavity, and a swing rod is provided on the gear;

[0010] The driving assembly includes a slidable rack arranged in the installation cavity, the rack is meshed with the gear, the movement of the rack drives the gear to rotate, and the rotation of the gear drives the two ends of the swing rod to push the corresponding moving plates to move, so that the two moving plates move away from each other.

[0011] Preferably, a pull rod with one end extending out of the mounting plate is provided at one end of the rack, and a handle for pulling the pull rod to move is provided at the extended end of the pull rod.

[0012] Preferably, a positioning block is provided in the installation cavity, a round rod passing through the positioning block is provided at the other end of the rack, a blocking ring is provided at the passing end of the round rod, a second spring is sleeved on the round rod between the blocking ring and the positioning block, and the second spring is used to push the blocking ring away from the positioning block.

[0013] Preferably, a slot is provided on the bottom wall of the installation cavity along the moving direction of the rack, and a block is provided on the lower end surface of the rack to be inserted into the slot.

[0014] Preferably, a limiting plate is provided on the upper end surface of the mounting plate.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model drives two moving plates to move away from each other through a driving assembly, and the two moving plates move away from each other to drive the corresponding moving rods to move along the mounting groove, so that the moving rods move to drive the corresponding plug-in plates to move, and one end of the plug-in rod slides out of the plug-in hole, thereby releasing the installation of the fixed plate on the mounting plate. Compared with the existing ones, this type of geological disaster detection and early warning device is more convenient for staff to disassemble the fixed plate from the mounting plate in actual use, thereby facilitating the staff to inspect and maintain the early warning device body on the fixed plate, and has good practicality.

[0017] 2. In the utility model, a limit plate is fixedly installed on the upper end surface of the mounting plate. When a side wall of the fixing plate abuts against the limit plate, the insertion hole on the fixing plate just corresponds to the corresponding insertion rod. At this time, the two plug-in plates are close to each other, and the insertion rods on the plug-in plates just insert into the corresponding insertion holes, so that the insertion rods on the plug-in plates can be accurately inserted into the corresponding insertion holes, and the actual use effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a structural schematic diagram of a geological disaster detection and early warning device.

[0019] Figure 2 It is a schematic diagram of the exploded structure of the mounting plate and the fixing plate in the utility model.

[0020] Figure 3 It is a structural schematic diagram of a cross-section of the installation assembly in the present utility model.

[0021] Figure 4 It is a schematic diagram of the structure inside the installation cavity in the utility model.

[0022] Figure 5 It is a schematic diagram of the exploded structure of the gear, gear and swing rod in the installation cavity in the utility model.

[0023] Figure 6 for Figure 4 Schematic diagram of the enlarged structure at point A in the middle.

[0024] The meaning of the symbols in the figure is:

[0025] 100, base; 101, screw; 110, fixing plate; 111, warning device body; 120, support rod; 130, mounting plate;

[0026] 201, jack; 210, plug board; 211, plug rod; 220, limit plate;

[0027] 301, mounting cavity; 302, mounting groove; 310, moving plate; 311, moving rod; 320, penetrating rod; 321, penetrating ring; 330, first spring;

[0028] 400, gear; 410, swing lever; 420, rack; 421, pull rod; 422, handle;

[0029] 500, card block; 501, card slot; 510, protruding rod;

[0030] 600, positioning block; 610, round rod; 620, blocking ring; 630, second spring. DETAILED DESCRIPTION

[0031] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only used to explain the utility model but not to limit it.

[0032] The following is combined with Figure 1-Figure 6 This embodiment is described in further detail.

[0033] like Figure 1 As shown, a geological disaster detection and early warning device in this embodiment includes a base 100 and a fixed plate 110, the fixed plate 110 is provided with an early warning device body 111, and the fixed plate 110 is provided with a plurality of plug holes 201 on the opposite side walls, the base 100 is provided with a support rod 120, and the support rod 120 is provided with a mounting plate 130 for placing the fixed plate 110, and the upper end surface of the mounting plate 130 is provided with a relative plug plate 210, and the opposite side walls of the plug plate 210 are provided with a plurality of plug rods 211, and the mounting plate 130 is provided with a mounting cavity 301, and the upper end surface of the mounting plate 130 is provided with a plurality of and relatively The mounting groove 302 is provided in the mounting cavity 301, and a relative and movable moving plate 310 is provided in the mounting cavity 301. A plurality of moving rods 311 are provided on the upper end surface of the moving plate 310, and one end of the moving rods 311 extends out of the corresponding mounting groove 302. The extending end of the moving rod 311 is connected to the corresponding plug plate 210. The mounting cavity 301 is provided with a mounting component for driving the two moving plates 310 to approach each other and inserting the plug rod 211 on the plug plate 210 into the corresponding socket 201. The mounting cavity 301 is also provided with a driving component for driving the two moving plates 310 to move away from each other and slide the plug plate 210 out of the corresponding socket 201.

[0034] In this embodiment, by fixing the base 100 on the ground, the support rod 120 on the base 100 is kept in a vertically upward state, and then the fixing plate 110 is placed on the upper end surface of the mounting plate 130, and the two movable plates 310 are driven to approach each other by the mounting assembly in the mounting cavity 301, and the two movable plates 310 drive the corresponding movable rods 311 to move along the mounting groove 302, so that the movable rods 311 move and drive the corresponding plug-in plate 210 to move, and the plug-in rod 211 on the plug-in plate 210 is inserted into the corresponding plug-in hole 201, so that the fixing plate 110 is installed on the mounting plate 130, so that the installation of the fixing plate 110 on the mounting plate 130 is more convenient, that is, the installation of the early warning device body 111 on the mounting plate 130 is more convenient. At this time, the early warning device body 111 has a certain height on the fixing plate 110, and can detect geological disasters in the distance. When the early warning device body 111 detects a geological disaster, the early warning device body 111 can issue an early warning to remind the staff of the occurrence of the geological disaster.

[0035] When the staff needs to inspect and maintain the early warning device body 111, the driving assembly in the installation cavity 301 drives the two moving plates 310 to move away from each other, and the two moving plates 310 move away from each other to drive the corresponding moving rods 311 to move along the installation slot 302, so that the moving rods 311 move and drive the corresponding plug-in plate 210 to move, and slide one end of the plug-in rod 211 out of the plug hole 201, thereby releasing the installation of the fixed plate 110 on the mounting plate 130. Compared with the existing ones, this kind of geological disaster detection and early warning device is more convenient for the staff to disassemble the fixed plate 110 from the mounting plate 130 in actual use, so that it is convenient for the staff to inspect and maintain the early warning device body 111 on the fixed plate 110, and the practicability is better.

[0036] The support rod 120 is fixedly mounted on the base 100, and a plurality of screws 101 penetrating the base 100 are fixedly mounted on the upper end surface of the base 100 along its circumferential direction. The screws 101 penetrate the base 100 and are threadedly mounted on the ground, thereby realizing the fixed installation of the base 100 on the ground, that is, the support rod 120 is vertically mounted, and the mounting plate 130 is fixedly mounted on the upper end of the support rod 120, thereby realizing the installation of the mounting plate 130 on the support rod 120;

[0037] Among them, one end of the moving rod 311 is fixedly connected to the moving plate 310, and the other end of the moving rod 311 is fixedly connected to the plug plate 210, so that the movement of the moving plate 310 can drive the plug plate 210 to move through the moving rod 311, and the plug rod 211 is fixedly installed on the plug plate 210, so that the movement of the plug plate 210 can drive one end of the plug rod 211 to insert or slide out of the corresponding plug hole 201, and the alarm body 111 is fixedly installed on the fixed plate 110, so that the fixed plate 110 can be disassembled and assembled on the mounting plate 130, that is, the alarm body 111 is disassembled and assembled on the mounting plate 130;

[0038] The plug plate 210 can shield the corresponding mounting groove 302, thereby preventing rainwater from flowing into the mounting cavity 301 from the mounting groove 302 in rainy weather, thereby affecting the movement effect of the movable plate 310 in the mounting cavity 301;

[0039] When it is actually used, the warning device body 111 adopts the existing structure disclosed in the patent with announcement number CN218630992U in the background technology, so it is not repeated here.

[0040] like Figure 1-4 As shown, in this embodiment, a through rod 320 with one end penetrating the moving plate 310 is provided on the opposite side walls of the installation cavity 301 and at both ends of the moving plate 310, and a through ring 321 is provided at the end of the through rod 320 penetrating the moving plate 310;

[0041] The mounting assembly includes a first spring 330 sleeved on the through rod 320 , and the first spring 330 is used to push the moving plate 310 toward the through ring 321 , so that the two moving plates 310 are brought closer to each other.

[0042] In this embodiment, by setting the through rod 320, the through ring 321 and the first spring 330, one end of the through rod 320 is fixedly installed on the side wall of the installation cavity 301, and the through ring 321 is threadedly installed on the other end of the through rod 320, and the movable plate 310 on the through rod 320 is intercepted, so as to realize the movable installation of the movable plate 310 in the installation cavity 301, and the first spring 330 is sleeved on the through rod 320 between the side wall of the installation cavity 301 and the movable plate 310, so as to realize the installation of the first spring 330 on the through rod 320. At this time, the first spring 330 pushes the movable plate 310 to approach the through ring 321, so as to realize the mutual approach of the two movable plates 310 in the installation cavity 301;

[0043] In actual use, a limiting plate 220 is fixedly installed on the upper end surface of the mounting plate 130. When a side wall of the fixing plate 110 abuts against the limiting plate 220, the insertion hole 201 on the fixing plate 110 just corresponds to the corresponding insertion rod 211. At this time, when the first spring 330 drives the two movable plates 310 to approach each other, the movable plate 310 can drive the insertion rod 211 on the corresponding insertion plate 210 to just be inserted into the corresponding insertion hole 201, so that the insertion rod 211 on the insertion plate 210 can be accurately inserted into the corresponding insertion hole 201, and the actual use effect is better.

[0044] like Figure 1-5 As shown, in this embodiment, a rotatable gear 400 is provided on the bottom wall of the installation cavity 301, and a swing rod 410 is provided on the gear 400;

[0045] The driving assembly includes a slidable rack 420 disposed in the installation cavity 301. The rack 420 is meshed with the gear 400. The rack 420 moves to drive the gear 400 to rotate. The rotation of the gear 400 drives the two ends of the swing rod 410 to push the corresponding moving plate 310 to move, thereby realizing the two moving plates 310 moving away from each other.

[0046] In this embodiment, by setting the gear 400, the swing rod 410 and the rack 420, the swing rod 410 is fixedly installed at the center position on the upper end surface of the gear 400. When the rack 420 moves, the rack 420 drives the gear 400 to rotate. At this time, the swing rod 410 on the gear 400 rotates in the installation cavity 301. When the swing rod 410 rotates, the two ends of the swing rod 410 push the corresponding moving plate 310 to move, so that the two moving plates 310 move away from each other, and the plugging rod 211 on the plugging plate 210 slides out of the corresponding plug hole 201, and then the installation and fixation of the fixed plate 110 on the mounting plate 130 is released;

[0047] A convex rod 510 is fixedly installed at the center of the installation cavity 301, and both ends of the convex rod 510 are fixedly installed on the opposite side walls of the installation cavity 301. The gear 400 and the swing rod 410 are sleeved on the convex rod 510 through a bearing seat to realize the rotation installation of the gear 400 in the installation cavity 301.

[0048] A pull rod 421 with one end extending out of the mounting plate 130 is fixedly installed at one end of the rack 420, and a handle 422 for pulling the pull rod 421 to move is fixedly installed at the extended end of the pull rod 421. The staff can drive the rack 420 in the mounting cavity 301 to move through the pull rod 421 by pulling the handle 422 outward, thereby driving the swing rod 410 to push the two moving plates 310 away from each other, which is more convenient in actual use.

[0049] A slot 501 is provided on the bottom wall of the installation cavity 301 along the moving direction of the rack 420, and a block 500 is fixedly installed on the lower end surface of the rack 420 and is inserted into the slot 501. The block 500 limits the moving distance of the rack 420, thereby preventing the rack 420 from moving too much and causing the rack 420 to be out of mesh with the gear 400, thereby affecting the actual use. At the same time, the rack 420 can be made more stable when moving.

[0050] In actual use, when the fixed plate 110 needs to be installed on the mounting plate 130, the corresponding movable plates 310 need to be pushed away from each other by the two ends of the swing rod 410, and the fixed plate 110 is placed between the two plug plates 210. At this time, the movable plate 310 compresses the first spring 330. When the two ends of the swing rod 410 release the push on the movable plate 310, the first spring 330 is released from compression, and the first spring 330 pushes the two movable plates 310 closer to each other, so that the plug rod 211 on the plug plate 210 can be inserted into the corresponding socket 201.

[0051] like Figure 1-6 As shown, in this embodiment, a positioning block 600 is provided in the installation cavity 301, and a round rod 610 penetrating the positioning block 600 is provided at the other end of the rack 420, and a blocking ring 620 is provided at the penetrating end of the round rod 610. A second spring 630 is sleeved on the round rod 610 between the blocking ring 620 and the positioning block 600, and the second spring 630 is used to push the blocking ring 620 away from the positioning block 600.

[0052] In this embodiment, by setting the positioning block 600, round rod 610, blocking ring 620 and the second spring 630, the positioning block 600 is fixedly installed on the bottom wall of the installation cavity 301, the round rod 610 is fixedly installed on the rack 420, and the blocking ring 620 is threadedly installed on the round rod 610, so as to realize the installation of the second spring 630 on the round rod 610 between the blocking ring 620 and the positioning block 600. When the staff pulls the rack 420 outward by the handle 422, the rack 420 moves through the round rod 610 to drive the blocking ring 620 to move toward the positioning block 600, so that the blocking ring 620 squeezes the second spring 630. At this time, the staff fixes the fixing plate 110 The second spring 630 is reset and pushes the blocking ring 620 away from the positioning block 600. The blocking ring 620 moves through the round rod 610 to drive the rack 420 to move toward the positioning block 600. The movement of the rack 420 drives the gear 400 to rotate, so that the swing rod 410 on the gear 400 can automatically release the push on the moving plate 310. The staff does not need to push the handle 422 to move toward the mounting plate 130. The pull rod 421 pushes the rack 420 to rotate to release the push of the swing rod 410 on the moving plate 310. It is more convenient in actual use.

[0053] In actual use, the two ends of the rack 420 are installed in the installation cavity 301 through the arrangement of the round rod 610 and the pull rod 421, so that the movement of the rack 420 in the installation cavity 301 is more stable.

[0054] Working principle: When installing the alarm body 111, first, the staff pulls the handle 422 outward to drive the swing rod 410 on the gear 400 to push the two moving plates 310 away from each other, and then places the fixed plate 110 between the two plug plates 210, so that one side wall of the fixed plate 110 abuts against the limit plate 220. Then, when the handle 422 is released, the second spring 630 drives the rack 420 to release the push of the swing rod 410 on the moving plate 310, so that the first spring 330 pushes the two moving plates 310 closer to each other. The two moving plates 310 are closer to each other, and the corresponding plug plate 210 is driven to move by the moving rod 311, and the plug plate 210 is moved. The plug rod 211 on it is inserted into the corresponding socket 201 to realize the installation of the fixed plate 110 on the mounting plate 130; when the staff needs to inspect and maintain the early warning device body 111, the staff pulls the handle 422 outward to drive the swing rod 410 on the gear 400 to push the two movable plates 310 away from each other. The two movable plates 310 move away from each other and the two plug plates 210 move away from each other through the moving rod 311, so that the plug rod 211 on the plug plate 210 slides out of the corresponding socket 201. At this time, the staff can remove the fixed plate 110 from the mounting plate 130 and inspect and maintain the early warning device body 111, which is more convenient in actual use.

[0055] In short, the above is only a preferred embodiment of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model should fall within the scope of the present utility model patent.

Claims

1. A geological disaster detection and early warning device, characterized in that: The invention comprises a base (100) and a fixing plate (110), wherein an early warning device body (111) is provided on the fixing plate (110), and a plurality of plug holes (201) are provided on opposite side walls of the fixing plate (110), a support rod (120) is provided on the base (100), and a mounting plate (130) for placing the fixing plate (110) is provided on the support rod (120), and an opposite plug plate (210) is provided on the upper end surface of the mounting plate (130), and a plurality of plug rods (211) are provided on opposite side walls of the plug plate (210), and a mounting cavity (301) is provided in the mounting plate (130), and a plurality of opposite mounting grooves (302) are provided on the upper end surface of the mounting plate (130). A relative and movable moving plate (310) is arranged in the installation cavity (301); a plurality of moving rods (311) are arranged on the upper end surface of the moving plate (310) and one end of the moving rods (311) extends out of the corresponding installation groove (302); the extended end of the moving rod (311) is connected to the corresponding plug plate (210); a mounting component for driving the two moving plates (310) to approach each other and inserting the plug rods (211) on the plug plate (210) into the corresponding plug hole (201) is arranged in the installation cavity (301); and a driving component for driving the two moving plates (310) to move away from each other and slide the plug plate (210) out of the corresponding plug hole (201) is also arranged in the installation cavity (301).

2. A geological disaster detection and early warning device according to claim 1, characterized in that: A through rod (320) having one end penetrating the movable plate (310) is provided on the opposite side walls of the installation cavity (301) and at both ends of the movable plate (310), and a through ring (321) is provided at the end of the through rod (320) penetrating the movable plate (310); The mounting assembly comprises a first spring (330) sleeved on the through rod (320), and the first spring (330) is used to push the movable plate (310) toward the through ring (321), so as to achieve the mutual approach of the two movable plates (310).

3. A geological disaster detection and early warning device according to claim 1, characterized in that: A rotatable gear (400) is provided on the bottom wall of the installation cavity (301), and a swing rod (410) is provided on the gear (400); The driving assembly comprises a rack (420) which is slidably arranged in the installation cavity (301); the rack (420) is meshed with the gear (400); the rack (420) moves to drive the gear (400) to rotate; the gear (400) rotates to drive the two ends of the swing rod (410) to push the corresponding moving plates (310) to move, thereby achieving the mutual distance between the two moving plates (310).

4. A geological disaster detection and early warning device according to claim 3, characterized in that: A pull rod (421) having one end extending out of the mounting plate (130) is provided at one end of the rack (420), and a handle (422) for pulling the pull rod (421) to move is provided at the extended end of the pull rod (421).

5. A geological disaster detection and early warning device according to claim 4, characterized in that: A positioning block (600) is provided in the installation cavity (301); a round rod (610) penetrating the positioning block (600) is provided at the other end of the rack (420); a blocking ring (620) is provided at the penetrating end of the round rod (610); a second spring (630) is sleeved on the round rod (610) between the blocking ring (620) and the positioning block (600); the second spring (630) is used to push the blocking ring (620) away from the positioning block (600).

6. A geological disaster detection and early warning device according to claim 5, characterized in that: A clamping groove (501) is provided on the bottom wall of the installation cavity (301) along the moving direction of the rack (420), and a clamping block (500) is provided on the lower end surface of the rack (420) and is clamped into the clamping groove (501).

7. A geological disaster detection and early warning device according to claim 1, characterized in that: A limiting plate (220) is provided on the upper end surface of the mounting plate (130).