Sensor installation assisting and protecting device capable of being rapidly disassembled and assembled

By designing a quick-disassembly sensor installation auxiliary and protection device, the problem of uneven sensor installation and easily damaged connection lines in environments such as underground mines is solved, achieving stable wall-mounted installation and effective protection of the sensor.

CN222379111UActive Publication Date: 2025-01-21SONGXIAN SHANJIN MINING CO LTD +1
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Patent Information

Application Number
CN202421216333.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-30
Publication Date
2025-01-21
Estimated Expiration
2034-05-30

AI Technical Summary

Technical Problem

In underground mines and other environments, the sensor installation position is uneven, so it is impossible to achieve tightly attached to the wall, and the connecting lines of wired sensor equipment are vulnerable to damage.

Method used

A quick-disassembly sensor installation auxiliary and protection device is designed, including a quick-disassembly box, a hopper and a vibration table. The sensor installation platform is made by using the quick-assembly and disassembly quick-disassembly box and is fixedly connected to the rock wall to realize the sensor installation. It is installed closely against the wall, and the sensor is fastened and protected through quick-release connectors.

Benefits of technology

It achieves stable installation and wall fastening of the sensor, reduces the physical impact on the sensor during the installation process, effectively protects the sensor connection line, and improves the reliability and security of sensor data.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a sensor installation assisting and protecting device capable of being rapidly disassembled and assembled. The sensor installation assisting and protecting device comprises a rapid disassembling and assembling box, a discharging hopper, a vibrating table and a rapid disassembling connecting piece, wherein the discharging hopper and the vibrating table are detachably connected with the rapid disassembling and assembling box. The device is mainly used for building a temporary sensor test platform and carrying out physical protection on a fastening wall-attached sensor and a high-precision sensor. According to the device, the beneficial effect that external installation influence factors of the sensor are remarkably reduced is achieved by building the installation protection platform, the beneficial effect that the sensor is effectively fastened and attached to the wall is further achieved, and meanwhile the exposed end of the sensor in the hole can be effectively protected through the device.
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Description

Technical Field

[0001] The utility model relates to the technical field of sensor installation assistance and protection, in particular to a sensor installation assistance and protection device which can be quickly disassembled and assembled. Background Art

[0002] Sensors are important components used to monitor the stability of underground mines, tunnels, and water conservancy and hydropower projects. They mainly measure important physical parameters such as stress and displacement during and after the construction of the project. For the project, the data obtained by the sensor can effectively guide the production and construction, which is very important for the stability of the project and the safety control of the construction process.

[0003] However, the data obtained by the sensor depends not only on the accuracy, stability and other factors of the sensor itself, but also on the standardization of the installation process and the stability of the installation, which are also very important for whether the sensor data is reliable and effective. Especially in underground mines, the tunnel walls, floors and other environments are not flat due to the use of drilling and blasting methods. Therefore, sensors that need to be installed against the wall or require an extremely flat installation platform cannot be well installed in the above-mentioned environment with low flatness. In addition, the vast majority of sensors are wired devices, and their tail connecting wires are particularly fragile due to the spot welding process, and are easily damaged by external disturbances. That is, the installation conditions in existing mines and other environments have the following technical problems:

[0004] 1. The installation positions of the tunnel walls, bottom plates, etc. are not flat, which cannot meet the requirements of high flatness and special monitoring space for sensor installation.

[0005] 2. The sensor installed on the wall cannot be tightly attached to the wall during installation.

[0006] 3. The tail connection line of the wired sensor equipment is easily damaged due to the installation process and installation environment.

[0007] The utility model patent with the publication number CN212059847U provides an environmentally friendly blasting vibration sensor auxiliary device. The device includes an upper clamping plate and a lower clamping plate correspondingly arranged in the vertical direction, support rods are respectively arranged vertically at the four corners of the upper clamping plate and the lower clamping plate, the four corners of the lower clamping plate are fixed on the support rods, the upper clamping plate is movably connected to the support rods around, the upper clamping plate is above the lower clamping plate, a compression spring is arranged on the support rod between the upper clamping plate and the lower clamping plate, and the upper end of the support rod extends upward through the upper clamping plate, a connecting plate is fixed at the upper end of the support rod, a threaded hole is arranged in the middle of the connecting plate, a connecting bolt is assembled in the threaded hole, the lower end of the connecting bolt is fixedly connected to the upper surface of the upper clamping plate, the head of the connecting bolt is above the connecting plate, the lower end face of the support rod is movably connected to the base, a sensor is placed on the lower clamping plate, and the upper end face of the sensor contacts the lower end face of the upper clamping plate.

[0008] The utility model patent with publication number CN209166644U provides a tunnel blasting vibration sensor fixing device. The device includes a bottom iron plate, the bottom iron plate is provided with four groups of through holes at equal distances from the midpoints of the four sides, bolts are inserted into the through holes, nuts are threadedly connected to the bolts, four groups of snap locks are installed on the inside of the bottom iron plate corresponding to the four groups of through holes, a fixed baffle is provided at the center of the bottom iron plate, a sensor body is provided on the fixed baffle, an upper top plate is placed on the upper part of the sensor body and a baffle ring is provided on the upper top plate, and the upper top plate fixes the sensor body to the bottom iron plate through four groups of snap locks.

[0009] However, the above devices cannot effectively solve the above technical problems and cannot achieve stable and wall-mounted installation of sensors. In view of this, it is necessary to design an improved quick-disassembly sensor installation auxiliary and protection device that can assist the effective installation of sensors and protect them to solve the above problems. Utility Model Content

[0010] The utility model aims to provide a sensor installation auxiliary and protective device which can be quickly disassembled and assembled.

[0011] In order to achieve the above-mentioned utility model object, the utility model provides a sensor installation auxiliary and protection device with quick disassembly and assembly, which includes a quick disassembly and assembly box, a discharge hopper and a vibration table detachably connected to the quick disassembly and assembly box;

[0012] The quick disassembly box can be quickly assembled and disassembled, and is used to make a sensor installation platform that is fixedly connected to the rock wall and matches the sensor; the sensor is arranged close to the rock wall or not close to the rock wall;

[0013] Alternatively, the quick-disassembly sensor installation auxiliary and protection device includes a quick-disassembly box, which as a whole serves as a sensor installation platform, is fixedly connected to the rock wall and has a built-in sensor and a sensor connecting line.

[0014] As a further improvement of the utility model, the quick disassembly box includes a front bearing plate, a rear bearing plate, and a middle connecting plate that are symmetrically and parallelly arranged; the rear bearing plate is provided with a hoisting hole for wall mounting.

[0015] As a further improvement of the present invention, the front bearing plate is a hole-free front bearing plate, and the rear bearing plate is a closed rear bearing plate, and the two are used in combination; a through groove is provided in the middle of the closed rear bearing plate, and the whole is an upper and lower separated structure, and closing and opening are achieved by locks provided on both sides of the closed rear bearing plate.

[0016] As a further improvement of the present invention, the front bearing plate is an open-hole front bearing plate, and the rear bearing plate is an open-type rear bearing plate, and the two are used in combination.

[0017] As a further improvement of the present invention, the rear bearing plate and the front bearing plate are both provided with non-through grooves that closely match the middle connecting plate, and are both made of steel plates.

[0018] As a further improvement of the utility model, the middle connecting plate includes a middle connecting plate upper plate, a middle connecting plate lower plate, a middle connecting plate left plate and a middle connecting plate right plate which are arranged to surround each other.

[0019] As a further improvement of the utility model, a discharge circular hole is provided on the upper plate of the middle connecting plate; the discharge hopper is detachably connected to the discharge circular hole, and grouting is achieved by cooperating with the discharge circular hole.

[0020] As a further improvement of the utility model, the lower plate of the middle connecting plate is detachably connected to the vibration table, and is used for vibrating and compacting the grouting material.

[0021] As a further improvement of the present invention, the quick-release box further comprises a quick-release connector, which comprises a quick-release connector rod, a fastening connector and a platform support connector, and is used for fastening and supporting the sensor.

[0022] As a further improvement of the utility model, a rubber mold is installed on the outer side of the open rear load-bearing plate.

[0023] The beneficial effects of the utility model are:

[0024] The quick-disassembly sensor installation auxiliary and protection device provided by the utility model is mainly used to build a temporary sensor test platform, to physically protect the sensors fastened to the wall and the high-precision sensors. The device achieves the beneficial effect of significantly reducing the external installation factors of the sensor by building an installation protection platform, and also achieves the beneficial effect of effectively fastening the sensor to the wall. At the same time, the device can also be used to effectively protect the exposed end of the sensor in the hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The utility model provides a schematic diagram of the structure of the quick disassembly and assembly sensor installation auxiliary and protective device.

[0026] Figure 2 This is a structural schematic diagram of the quick disassembly and assembly box provided by the utility model.

[0027] Figure 3 The utility model is a schematic structural diagram of the discharge hopper.

[0028] Figure 4 This is a schematic structural diagram of the vibration table provided by the utility model.

[0029] Figure 5 This is a structural schematic diagram of the quick-release connecting rod provided by the utility model.

[0030] Figure 6 This is a structural schematic diagram of the non-hole front bearing plate provided by the utility model.

[0031] Figure 7 This is a structural schematic diagram of a perforated front bearing plate provided by the utility model.

[0032] Figure 8 This is a structural schematic diagram of the closed rear bearing plate provided by the utility model.

[0033] Fig. 9 This is a structural schematic diagram of the open rear load-bearing plate provided by the utility model.

[0034] Reference numerals

[0035] 1-quick-release connecting rod; 2-fastening bolt; 3-platform support bolt; 4-right plate of middle connecting plate; 5-upper plate of middle connecting plate; 6-lower plate of middle connecting plate; 7-left plate of middle connecting plate; 8-front load-bearing plate; 9-rear load-bearing plate; 10-discharging hopper; 11-vibrating table.

[0036] Among them, 8a is a non-porous front bearing plate; 8b is a perforated front bearing plate; 9a is a closed rear bearing plate; 9b is an open rear bearing plate. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0039] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0040] See also Figures 1 to 8As shown, the utility model provides a sensor installation auxiliary and protection device for quick disassembly, which includes a quick disassembly box, a discharge hopper 10 and a vibration table 11 detachably connected to the quick disassembly box, and a quick-release connector; the quick disassembly box can be quickly assembled and disassembled, and is used to make a sensor installation platform fixedly connected to a rock wall and matched with a sensor; the sensor is arranged to be attached to the rock wall or not attached to the rock wall;

[0041] Alternatively, the quick-disassembly sensor installation auxiliary and protection device includes a quick-disassembly box, which as a whole serves as a sensor installation platform, is fixedly connected to the rock wall and has a built-in sensor and a sensor connecting line.

[0042] See also Figure 2 As shown, the quick disassembly box comprises a front bearing plate 8, a rear bearing plate 9, and a middle connecting plate which are symmetrically arranged in parallel with each other; the rear bearing plate 9 is provided with a hoisting hole for wall mounting.

[0043] The rear bearing plate 9 and the front bearing plate 8 are both provided with non-through grooves that are closely matched with the middle connecting plate, and are both made of steel plates.

[0044] In some embodiments, see Figure 6 and Figure 8 As shown, the front bearing plate 8 is a hole-free front bearing plate, and the rear bearing plate 9 is a closed rear bearing plate, and the two are used in combination; a through groove is provided in the middle of the closed rear bearing plate, and the whole is an upper and lower separated structure, and closing and opening are achieved by locks provided on both sides of the closed rear bearing plate.

[0045] In some other specific embodiments, please refer to Figure 7 and Fig. 9 As shown, the front bearing plate 8 is an open-hole front bearing plate, and the rear bearing plate 9 is an open-type rear bearing plate, and the two are used in combination.

[0046] A rubber mold (not shown) is installed on the outer side of the open rear bearing plate. A hole is opened on the front bearing plate 8, and the sensor can be tightly pressed against the rock wall through threads. The rear bearing plate 9 is installed with a rubber mold. The technical functions of the rubber mold are: first, it can ensure that the sensor is effectively attached to the wall, and second, it can ensure that the slurry does not overflow and can form a platform.

[0047] The middle connecting plate comprises a middle connecting plate upper plate 5, a middle connecting plate lower plate 6, a middle connecting plate left plate 7 and a middle connecting plate right plate 4 which are mutually enclosed. A discharge circular hole (not marked in the figure) is provided on the middle connecting plate upper plate 5; the discharge hopper 10 is detachably connected to the discharge circular hole, and grouting is achieved by cooperating with the discharge circular hole. The middle connecting plate lower plate 6 is detachably connected to the vibration table 11, which is used to vibrate and compact the grouting material.

[0048] The quick-release connector includes a quick-release connector rod 1, a fastening connector (ie, a fastening bolt 2) and a platform support connector (ie, a platform support bolt 3), which are used to fasten and support the sensor.

[0049] The quick disassembly and assembly sensor installation auxiliary and protection device provided by the utility model has the following components and technical functions:

[0050] The front bearing plate 8 is made of steel plate with a non-through groove in the middle, which is mainly used to connect the middle connecting plate and fasten the rear bearing plate 9. This component has two forms, one is a hole-free type and the other is a hole-opening type. The hole-free type is mainly used to make a sensor installation platform to ensure flatness and sealing. The hole-opening type is mainly used for fastening the wall-attached sensor, and the sensor is well attached to the wall by rotating the fastening rod (quick-release connecting rod 1).

[0051] The rear bearing plate 9 is also made of steel plate, with a non-through groove in the middle, which is mainly used to connect the middle connecting plate and fasten the front bearing plate 8. At the same time, hanging holes are provided for wall installation. This component also has two forms, one is closed and the other is open. Both forms of rear bearing plates require openings at the upper outer edge of the plate as hanging holes to facilitate wall installation.

[0052] Specifically, the closed rear bearing plate is mainly used to cooperate with the hole-free front bearing plate to make a sensor installation platform. When making the sensor installation platform, considering the stability of the platform, two expansion bolts need to be driven into the rock wall / wall so that the platform can form a stable reinforced concrete structure after pouring concrete. For this reason, there is a through groove in the middle of this type of rear bearing plate to facilitate the installation of the platform support bolts on the rock wall. At the same time, this type of bearing plate is separated from top to bottom and can be closed and opened by the locks on both sides. When the platform maintenance is completed, it can be quickly disassembled when the mold is removed.

[0053] The open rear bearing plate is mainly used in conjunction with the perforated front bearing plate. When the sensor only needs to be installed against the wall, it is only necessary to use a fastening rod to tightly fit the sensor to the rock wall through the front bearing plate. When the sensor needs to build a platform for isolation, the rubber membrane can be fixed to the outside of the open rear bearing plate, and the sensor can be fastened to the wall and then poured to form a stable platform. When the sensor type is an in-hole sensor and the connection or data cable needs to be protected, the open rear bearing plate and the perforated front bearing plate can be used as a temporary protection device to protect the fragile sensor tail connection.

[0054] The middle connecting plate is a connecting and sealing device of the device, which is tightly matched with the non-through grooves of the front / rear bearing plates 8 / 9 to keep the width and height cross-section unchanged, and the length of the plate can be changed according to the sensor installation requirements. If material discharge is required, a discharge circular hole needs to be opened on the upper plate 5 of the middle connecting plate.

[0055] The quick-release connector tightly engages the rear load-bearing plate 9 through threads, and quickly disassembles and assembles the front load-bearing plate 8 through long threads and quick clamps, thereby ensuring quick and tight cooperation of the sensor installation auxiliary and protective device.

[0056] The discharge hopper 10 is used for the upper plate 5 of the middle connecting plate, and cooperates with the discharge circular hole of the upper plate 5 of the middle connecting plate to perform grouting of materials such as concrete.

[0057] The vibration table 11 is mainly connected to the lower plate of the middle connecting plate of the vibration table 11 through screws, and the lower plate 6 of the middle connecting plate is used as a supporting structure to vibrate and compact materials such as concrete, ensure the integrity and stability of the platform, and further enhance the construction strength of the platform.

[0058] Example 1

[0059] This embodiment 1 provides a quick-disassembly sensor installation auxiliary and protection device. The quick-disassembly box can be quickly assembled and disassembled. A sensor installation platform fixedly connected to the rock wall and matched with the sensor is provided inside the quick-disassembly box. The installation operation is as follows:

[0060] First, connect the hole-free front bearing plate 8a, the closed rear bearing plate 9a, and the upper, lower, left, and right plates 4 / 5 / 6 / 7 of the middle connecting plate in sequence, and use quick-release connectors to fix all the plates through the four fixing holes of the front / rear bearing plates. Drill four holes in the rock wall / wall in sequence, install two platform support bolts and two fastening bolts respectively, the two platform support bolts are embedded in the device through the through grooves of the closed rear bearing plate 9a, and the two fastening bolts are used to fasten the device through the installation and fixing holes of the closed rear bearing plate 9a. Lift and fasten the vibration table 11 through the installation hole of the lower plate 6 of the middle connecting plate, place the discharge hopper 10 on the discharge circular hole of the upper plate 5 of the middle connecting plate, and use quick-drying cement to make a sensor installation platform. After grouting, use the vibration table 11 for vibration, and remove the vibration table 11 and the discharge hopper 10 after the vibration is completed. Suspend the blasting vibrator and other equipment in the unsolidified cement, wait for 30 minutes, then take out the sensor, and wait for 1 hour for the cement to completely solidify before re-placing the sensor. The sensor installation platform produced can not only ensure the reliability of sensor data collection, but also ensure the safety of the equipment.

[0061] Example 2

[0062] This embodiment 2 provides a quick-disassembly sensor installation auxiliary and protection device. The quick-disassembly box can be quickly assembled and disassembled. A sensor installation platform fixedly connected to the rock wall and matched with the sensor is provided inside the quick-disassembly box. The installation operation is as follows:

[0063] First, connect the upper, lower, left and right plates of the perforated front bearing plate 8b, the open rear bearing plate 9b, and the middle connecting plate in sequence, and use quick-release connectors to fix all the plates through the four fixing holes of the front / rear bearing plates. Drill four holes in the rock wall / wall in sequence, and install two platform support bolts and two fastening bolts respectively. Install a rubber mold and drill holes on the outside of the open rear bearing plate 9b, and embed the two platform support bolts into the device through the open rear bearing plate 9b. The two fastening bolts fasten the device through the installation and fixing holes of the open rear bearing plate 9b. Lift and fasten the vibration table 11 through the installation hole of the lower plate 6 of the middle connecting plate, and place the discharge hopper 10 on the discharge circular hole of the upper plate 5 of the middle connecting plate. Pass the fastening bolt through the perforated front bearing plate 8b and squeeze it onto the wall-attached sensor, and fasten the sensor through the upper thread of the fastening bolt. Use quick-drying cement to make the sensor installation platform. After grouting, use the vibration table 11 for vibration, and remove the vibration table 11 and the discharge hopper 10 after the vibration is completed. Wait for 1 hour for the cement to completely solidify before disassembling the equipment. The equipment can then be fastened to the rock wall, which is mainly used for irregular rock walls.

[0064] Example 3

[0065] This embodiment 3 provides a quick-disassembly sensor installation auxiliary and protection device. The quick-disassembly box serves as a sensor installation platform, is fixedly connected to the rock wall and has a built-in sensor and sensor connection line. The installation operation is as follows:

[0066] First, connect the perforated front / rear bearing plates 8 / 9b and the upper, lower, left and right plates 4 / 5 / 6 / 7 of the middle connecting plate in sequence, and use quick-release connectors to fix all the plates through the four fixing holes of the front / rear bearing plates. Drill two holes in the rock wall in sequence and install two fastening bolts respectively. The two fastening bolts fix the quick-disassembly box to the rock wall through the installation and fixing holes of the rear bearing plate 9b. The sensor tail connection part is completely placed in the quick-disassembly box, thereby achieving effective protection of the sensor and its connecting components, which effectively solves the problem that the tail connection line of the wired sensor device is easily damaged.

[0067] In summary, the utility model provides a sensor installation auxiliary and protective device for quick disassembly, which includes a quick disassembly box, a discharge hopper and a vibration table detachably connected to the quick disassembly box, and a quick-release connector; the quick disassembly box can be quickly assembled and disassembled, and is used to make a sensor installation platform that is fixedly connected to the rock wall and matches the sensor; the sensor is attached to the rock wall or not; or, the sensor installation auxiliary and protective device for quick disassembly includes a quick disassembly box, and the quick disassembly box as a whole serves as a sensor installation platform, which is fixedly connected to the rock wall and has a built-in sensor and sensor connection line. The device is mainly used to build a temporary test platform for sensors, and to physically protect sensors that are fastened to the wall and high-precision sensors. The device achieves the beneficial effect of significantly reducing the factors affecting the external installation of the sensor by building an installation protection platform, and also achieves the beneficial effect of effectively fastening the sensor to the wall. At the same time, the device can also be used to achieve effective protection of the exposed end of the sensor in the hole.

[0068] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A quick-disassembly sensor installation auxiliary and protection device, characterized in that: It comprises a quick disassembly box, a discharge hopper and a vibration table detachably connected to the quick disassembly box; The quick disassembly box can be quickly assembled and disassembled, and is used to make a sensor installation platform that is fixedly connected to the rock wall and matches the sensor; the sensor is arranged close to the rock wall or not close to the rock wall; Alternatively, the quick-disassembly sensor installation auxiliary and protection device includes a quick-disassembly box, which as a whole serves as a sensor installation platform, is fixedly connected to the rock wall and has a built-in sensor and a sensor connecting line.

2. A quick-disassembly sensor installation auxiliary and protective device according to claim 1, characterized in that: The quick disassembly and assembly box comprises a front bearing plate, a rear bearing plate and a middle connecting plate which are symmetrically and parallelly arranged with each other; the rear bearing plate is provided with a hoisting hole for wall-mounting.

3. A quick-disassembly sensor installation auxiliary and protection device according to claim 2, characterized in that: The front bearing plate is a hole-free front bearing plate, and the rear bearing plate is a closed rear bearing plate, and the two are used in combination; a through groove is provided in the middle of the closed rear bearing plate, and the whole is an upper and lower separated structure, and closing and opening are achieved by locks provided on both sides of the closed rear bearing plate.

4. The quick-disassembly sensor installation auxiliary and protection device according to claim 2, characterized in that: The front bearing plate is an open-hole front bearing plate, and the rear bearing plate is an open-type rear bearing plate, and the two are used in combination.

5. The quick-disassembly sensor installation auxiliary and protective device according to claim 2, characterized in that: The rear bearing plate and the front bearing plate are both provided with non-through grooves that are closely matched with the middle connecting plate, and are both made of steel plates.

6. The quick-disassembly sensor installation auxiliary and protection device according to claim 2, characterized in that: The middle connecting plate comprises a middle connecting plate upper plate, a middle connecting plate lower plate, a middle connecting plate left plate and a middle connecting plate right plate which are arranged to surround each other.

7. A quick-disassembly sensor installation auxiliary and protective device according to claim 6, characterized in that: A discharge circular hole is provided on the upper plate of the middle connecting plate; the discharge hopper is detachably connected to the discharge circular hole, and grouting is achieved by cooperating with the discharge circular hole.

8. The quick-disassembly sensor installation auxiliary and protection device according to claim 6, characterized in that: The lower plate of the middle connecting plate is detachably connected to the vibration table and is used for vibrating and compacting the grouting material.

9. The quick-disassembly sensor installation auxiliary and protective device according to claim 1, characterized in that: The quick-release box further comprises a quick-release connector, which comprises a quick-release connector rod, a fastening connector and a platform support connector, and is used for fastening and supporting the sensor.

10. The quick-disassembly sensor installation auxiliary and protective device according to claim 4, characterized in that: A rubber mold is installed on the outer side of the open rear bearing plate.

Citation Information

Patent Citations

  • Tunnel blasting vibration sensor fixing device

    CN209166644U

  • Environment-friendly blasting vibration measurement sensor auxiliary device

    CN212059847U