Cable anti-excavation alarm device

By designing a cable anti-excavation alarm device including a touch mechanism, a protective mechanism and a warning mechanism, the problem of false alarm due to vibration frequency in the prior art is solved, and higher working quality and stability are achieved, ensuring the safety of the cable.

CN119851408APending Publication Date: 2025-04-18HAIDONG POWER SUPPLY COMPANY STATE GRID QINGHAI ELECTRIC POWER +1

Patent Information

Application Number
CN202411923075.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2025-04-18

AI Technical Summary

Technical Problem

The existing underground cable anti-damage alarm device may cause false alarms due to the transmission of vibration frequency during excavation, which will affect the protection effect of the equipment itself.

Method used

A cable anti-excavation alarm device is designed, using a touch mechanism, a protective mechanism and a warning mechanism to define the initial position of multiple groups of components inside the outer shell through the connection of the pull rope. When the excavator excavates, the pull rope breaks, the touch switch connects with the electrode seat, the trigger member cooperates with the smoke storage cylinder, plays warning voice and outputs smoke, prompting the peripheral excavator to have cables in this area.

Benefits of technology

It effectively avoids the problem of false alarm due to vibration frequency, improves the working quality and stability of the equipment, and ensures the safety of the cable.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses an anti-excavation alarm device for a cable, belongs to the technical field of cable protection, and solves the problem that an existing alarm device is easily triggered by the vibration frequency of excavation in a peripheral area, the anti-excavation alarm device comprises a mounting bracket, an outer shell, a sliding part and a linkage rod, and the outer shell is mounted at the top end of the mounting bracket; a sliding part is slidably installed at an opening in the top end of the outer shell, and a linkage rod is installed at the bottom end of the sliding part. In the cable protection device, through arrangement of a touch mechanism, a protection mechanism and a warning mechanism, the initial positions of multiple sets of components in the outer shell are limited through connection of a pulling rope; when the pulling rope is broken, the trigger switch is driven to be in butt joint with the motor base, the trigger piece is matched with the smoke storage barrel, warning voice is played, smoke is output, surrounding excavation personnel are warned, and cables exist in the area, so that the working quality of the equipment is stably improved, and the stability of the equipment during operation is guaranteed.
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Description

Technical Field

[0001] The invention belongs to the technical field of cable protection, and in particular relates to a cable anti-excavation alarm device. Background Art

[0002] A cable is an electrical energy or signal transmission device, usually composed of several or several groups of wires, usually a rope-like cable formed by twisting several or several groups of wires (at least two in each group). Each group of wires is insulated from each other and often twisted around a center. The entire outside is covered with a highly insulating covering. The cable has the characteristics of being powered inside and insulated outside. The cable is generally buried deep underground, and special reminder stakes are set on the surface.

[0003] Chinese patent CN114842600A discloses an underground cable anti-destruction alarm device. The underground cable anti-destruction alarm device includes a housing, a vibration monitor, a warning light and a power supply module. The vibration monitor is arranged in the housing. The vibration monitor can collect vibration information within a preset range from the housing and generate a vibration waveform. When the amplitude of the vibration waveform is within an abnormal amplitude range and / or the frequency of the vibration waveform is within an abnormal frequency range, the warning light turns on;

[0004] The above design, through the cooperation of multiple groups of components, can detect the vibration frequency generated during excavation, and quickly remind the excavators that there is a cable at that location through the vibration frequency. However, there are certain problems in actual use. Specifically, when the device is in use, the frequency of excavation vibration will be transmitted under the ground. When the excavation site is close to the cable location but will not damage the cable, the device will still sound an alarm, affecting the protection effect of the device itself. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In order to solve the problems raised in the above background technology, the present invention adopts the following technical solutions.

[0007] A cable excavation prevention alarm device comprises a mounting bracket, an outer shell, a sliding portion and a linkage rod, wherein the outer shell is mounted on the top of the mounting bracket, the sliding portion is slidably mounted at the top opening of the outer shell, the linkage rod is mounted on the bottom end of the sliding portion, the linkage rod slides inside the outer shell, a protection mechanism for timely alarm and prompting is mounted on the bottom end of the linkage rod, the protection mechanism comprises a connecting base, a touch switch, an electrode seat and a controller body, the connecting base is fixedly mounted inside the outer shell, the linkage rod passes through the connecting base, the touch switch is fixedly mounted on the bottom end of the linkage rod, the electrode seat is symmetrically mounted on the lower surface of the connecting base, the controller body is mounted inside the outer shell, and the controller body is electrically connected to the electrode seat.

[0008] As a preferred technical solution of the present invention, the controller body is composed of a control panel, a GPS module and an alarm module. The control panel is electrically connected to the electrode seat, the GPS module is electrically connected to the control panel, the GPS module is for prompting the current data location, and the alarm module is electrically connected to the control panel.

[0009] As a preferred technical solution of the present invention, the electrode seat is composed of an electrical connection block and two groups of arc-shaped pieces. The electrical connection block is fixedly mounted on the lower surface of the connection base, and the arc-shaped pieces are symmetrically mounted on the lower surface of the electrical connection block.

[0010] As a preferred technical solution of the present invention, the alarm device also includes a trigger mechanism, which includes a protective top cover, a pushing top plate and a spring group. The protective top cover is installed at the top opening of the outer shell, the pushing top plate is installed on the lower surface of the sliding part, the pushing top plate slides in the protective top cover, and a spring group is arranged at the bottom end of the pushing top plate.

[0011] As a preferred technical solution of the present invention, the trigger mechanism also includes a pull rope, which is connected to the bottom end of the trigger switch, and a pull rope connection channel is opened inside the outer shell, and a pipeline for connecting with the pull rope is installed on the side of the outer shell.

[0012] As a preferred technical solution of the present invention, the alarm device also includes a warning mechanism, which includes a connecting seat, a pushing frame, a smoke storage cylinder, a trigger member and a mounting top plate, the mounting top plate is installed inside the outer shell, the trigger member is symmetrically installed on the lower surface of the mounting top plate, the connecting seat is installed outside the linkage rod, the pushing frame is symmetrically fixedly installed on both sides of the connecting seat, and the smoke storage cylinder is installed in the pushing frame.

[0013] As a preferred technical solution of the present invention, a sealing film is installed on the side of the top of the smoke storage tube close to the trigger member to prevent the smoke inside the smoke storage tube from leaking, and the trigger member is composed of a bottom plate and a conical plate, the bottom plate is installed at the bottom end of the mounting top plate, and the conical plate is installed on the lower surface of the bottom plate.

[0014] As a preferred technical solution of the present invention, the warning mechanism also includes a guide frame, which is symmetrically fixedly installed on the inner wall of the shell body, and there are multiple groups of guide frames. The smoke storage tube slides up and down inside the guide frame.

[0015] As a preferred technical solution of the present invention, the mounting bracket includes a fitting ring, a rotating ring, a fixed screw and a nut. The fitting ring is installed at the bottom end of the outer shell, and the rotating ring is rotatably installed at the end of the fitting ring. The fitting ring and the rotating ring are jointly threadedly installed with a fixed screw on the sides. The fixed screw passes through the fitting ring and the rotating ring at the same time, and the nut is threadedly engaged with the end of the fixed screw.

[0016] As a preferred technical solution of the present invention, the mounting bracket further comprises a bonding layer, the bonding layer is symmetrically mounted on the bonding ring and the inner wall of the rotating ring, and the bonding layer is bonded to the outer surface of the cable.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In the present invention, a trigger mechanism, a protection mechanism and a warning mechanism are provided, and the initial positions of multiple groups of components inside the outer shell are limited by the connection of a pull rope. When the excavators are digging the soil near the cable, the pull rope itself breaks, driving the trigger switch to dock with the motor seat and the trigger member to cooperate with the smoke storage cylinder. At the same time, a warning voice is played and smoke is output to warn the surrounding excavators that there are cables in the area, thereby stably improving the working quality of the equipment itself and ensuring the stability of the equipment during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of another viewing angle of the overall structure of the present invention.

[0021] Figure 3 It is a schematic plan view of the internal structure of the outer shell of the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of the protection mechanism in the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of the trigger mechanism of the present invention.

[0024] Figure 6 It is a schematic diagram of the structure of the warning mechanism in the present invention.

[0025] Figure 7 This is a schematic diagram of the mounting bracket structure of the present invention.

[0026] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0027] 1. Mounting bracket; 11. Fitting ring; 12. Rotating ring; 13. Fixing screw; 14. Nut; 15. Fitting layer; 2. Outer shell; 3. Sliding part; 4. Linkage rod; 5. Trigger mechanism; 51. Protective top cover; 52. Push top plate; 53. Spring group; 54. Pull rope; 6. Protective mechanism; 61. Connecting base; 62. Trigger switch; 63. Electrode seat; 64. Controller body; 7. Warning mechanism; 71. Connecting seat; 72. Pushing frame; 73. Smoke storage tube; 74. Trigger; 75. Install top plate; 76. Guide frame. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0031] Depend on Figure 1 , Figure 2 and Figure 3 As shown, it is a structural schematic diagram of the anti-excavation alarm device in this embodiment, including a mounting bracket 1, an outer shell 2, a sliding portion 3 and a linkage rod 4. The outer shell 2 is mounted on the top of the mounting bracket 1, and the sliding portion 3 is slidably mounted at the top opening of the outer shell 2. The linkage rod 4 is mounted on the bottom of the sliding portion 3. The linkage rod 4 slides inside the outer shell 2, and a protective mechanism 6 for timely alarm and prompting is mounted on the bottom of the linkage rod 4.

[0032] During use, the device is installed on the outer surface of the cable to be protected through the operation of the mounting bracket 1 itself, and then the device is covered as a whole by burying the upper soil. Before the device is operated, the sliding part 3 needs to be driven to push the linkage rod 4 to slide into the outer shell 2 to release the operating status of the components inside the device. When subsequent excavators dig the soil at the top of the cable, with the cooperation of other components in the device, the sliding part 3 is prompted to slide inside the outer shell 2. At this time, the protective mechanism 6 inside the outer shell 2 automatically enters the operating state, immediately broadcasts a warning voice, and prompts the cable maintenance worker of the current location of the cable, which is convenient for subsequent staff to maintain and protect it, thereby improving the protection effect of the overall equipment during use.

[0033] By the attached Figure 5 As shown, it is a structural schematic diagram of the protection mechanism 6 in this embodiment, the protection mechanism 6 includes a connecting base 61, a touch switch 62, an electrode seat 63 and a controller body 64, the connecting base 61 is fixedly installed inside the outer shell 2, the linkage rod 4 passes through the connecting base 61, the touch switch 62 is fixedly installed at the bottom end of the linkage rod 4, the electrode seat 63 is symmetrically installed on the lower surface of the connecting base 61, the controller body 64 is installed inside the outer shell 2, and the controller body 64 is electrically connected to the electrode seat 63.

[0034] During use, with the cooperation of other components in the equipment, the position of the sliding part 3 inside the outer shell 2 changes, driving the linkage rod 4 to slide to the side away from the outer shell 2. At this time, the linkage rod 4 drives the touch switch 62 to move to the side close to the electrode seat 63 until the touch switch 62 enters between the electrode seats 63 and is docked with the electrode seats 63. At this time, the current line connecting the base 61 and the inner side of the outer shell 2 is connected, and the controller body 64 enters the running state, immediately reminding the surrounding personnel that there is a cable at this time, and the components in the controller body 64 will send the current cable excavation position, which is convenient for subsequent maintenance personnel to perform maintenance and protection at this place.

[0035] By the attached Figure 5 As shown, the controller body 64 is composed of a control panel, a GPS module and an alarm module. The control panel is electrically connected to the electrode holder 63, and the GPS module is electrically connected to the control panel. The GPS module is used to prompt the current data location, and the alarm module is electrically connected to the control panel.

[0036] During use, the control panel is electrically connected to the electrode holder 63. When the touch switch 62 is connected to the electrode holder 63, the line connection is normal. At this time, the control panel enters the operating state. The GPS module will send the current cable position to the terminal of the cable maintenance personnel, prompting the maintenance personnel that there is a certain damage to the cable. The installation of the alarm module can play a preset alarm voice to prompt the excavators that there is a cable underground, so that the excavators stop working immediately, ensuring the stability of the cable during use.

[0037] By the attached Figure 5 As shown, the electrode holder 63 is composed of an electrical connection block and two groups of arc-shaped pieces. The electrical connection block is fixedly mounted on the lower surface of the connection base 61, and the arc-shaped pieces are symmetrically mounted on the lower surface of the electrical connection block.

[0038] During use, by installing and using the arc piece, the touch switch 62 can slide closely against the side surface of the arc piece during the sliding process, which assists the touch switch 62 to complete the docking with the base and keeps the internal circuit of the device unobstructed.

[0039] By the attached Figure 4 As shown, it is a structural schematic diagram of the trigger mechanism 5 in this embodiment. The alarm device also includes a trigger mechanism 5, which includes a protective top cover 51, a push top plate 52, a spring group 53 and a pull rope 54. The protective top cover 51 is installed at the top opening of the outer shell 2, and the push top plate 52 is installed on the lower surface of the sliding part 3. The push top plate 52 slides in the protective top cover 51. The spring group 53 is arranged at the bottom end of the push top plate 52. The pull rope 54 is connected to the bottom end of the trigger switch 62, and a channel for connecting the pull rope 54 is opened inside the outer shell 2, and a pipeline for connecting with the pull rope 54 is installed on the side of the outer shell 2.

[0040] During use, multiple groups of equipment are installed equidistantly outside the cable, and the pulling rope 54 is used to connect the multiple groups of components. When excavation occurs near the cable, the pulling rope 54 breaks due to the excavation at the upper end. At this time, the pulling and limiting effects of the pulling rope 54 on the end of the linkage rod 4 are released, and the spring group 53 will automatically release its accumulated elastic force, allowing the pushing top plate 52 and the sliding part 3 to slide inside the protective top cover 51, prompting the electrode seat 63 to dock with the touch switch 62, so that the entire component of the protective mechanism 6 is in operation, and during use, the side of the sliding part 3 is wrapped with a rubber layer to prevent groundwater from passing through the protective top cover 51 into the outer shell 2 and affecting the normal use of the internal components of the outer shell 2.

[0041] By the attached Figure 6As shown, it is a structural schematic diagram of the warning mechanism 7 in this embodiment. The alarm device also includes a warning mechanism 7, which includes a connecting seat 71, a pushing frame 72, a smoke storage tube 73, a trigger member 74 and a mounting top plate 75. The mounting top plate 75 is installed inside the outer shell 2, the trigger member 74 is symmetrically installed on the lower surface of the mounting top plate 75, the connecting seat 71 is installed outside the linkage rod 4, the pushing frame 72 is symmetrically fixedly installed on both sides of the connecting seat 71, and the smoke storage tube 73 is installed in the pushing frame 72.

[0042] During use, as the pulling rope 54 breaks, the overall position of the linkage rod 4 slides up and down inside the outer shell 2, so that the connecting seat 71 pushes the pushing frame 72 to move to the side close to the mounting top plate 75. At this time, the smoke storage tube 73 collides with the trigger member 74, and the smoke storage tube 73 will emit smoke. This type of smoke is discharged through the holes and grooves in the mounting top plate 75 and the protective top cover 51, reminding the surrounding excavators that there are cables there, and providing timely reminders to the surrounding personnel.

[0043] By the attached Figure 6 As shown, a sealing film is installed on one side of the top of the smoke storage tube 73 close to the trigger member 74 to prevent the smoke inside the smoke storage tube 73 from leaking, and the trigger member 74 is composed of a bottom plate and a conical plate, the bottom plate is installed at the bottom end of the mounting top plate 75, and the conical plate is installed on the lower surface of the bottom plate.

[0044] During use, when the pushing frame 72 pushes the smoke storage tube 73 to move to the side close to the trigger member 74, the sealing film at the top of the smoke storage tube 73 is destroyed by the conical plate, and the smoke stored inside the smoke storage tube 73 is discharged from the opening at the top of the smoke storage tube 73, passes through the mounting top plate 75 and the protective top cover 51 and is discharged out of the equipment, thus serving as a handle for people around.

[0045] By the attached Figure 6 As shown, the warning mechanism 7 also includes a guide frame 76 , which is symmetrically fixedly installed on the inner wall of the outer shell 2 , and there are multiple groups of guide frames 76 , and the smoke storage tube 73 slides up and down inside the guide frame 76 .

[0046] During use, multiple sets of guide frames 76 are installed to limit the position of the smoke storage tube 73 itself. When the pushing frame 72 pushes the smoke storage tube 73 to slide, the inner circle of the guide frame 76 will limit the moving trajectory of the smoke storage tube 73 itself, ensuring that the smoke storage tube 73 can accurately collide with the trigger member 74, thereby assisting the stable operation of the equipment.

[0047] By the attached Figure 7As shown, it is a schematic diagram of the structure of the mounting bracket 1 in this embodiment, the mounting bracket 1 includes a fitting ring 11, a rotating ring 12, a fixed screw 13 and a nut 14, the fitting ring 11 is installed at the bottom end of the outer shell 2, the rotating ring 12 is rotatably installed at the end of the fitting ring 11, the fitting ring 11 and the rotating ring 12 are threadedly installed on the side of the fixing screw 13, the fixing screw 13 passes through the fitting ring 11 and the rotating ring 12 at the same time, and the nut 14 is threadedly installed at the end of the fixing screw 13

[0048] During use, the rotating ring 12 is rotated, and then the fitting ring 11 is installed on the outer surface of the cable. The rotating ring 12 is rotated to form a complete ring structure with the fitting ring 11. Then, the positions of the fitting ring 11 and the rotating ring 12 are locked by using the fixing screw 13 and the nut 14, so that the entire device can be stably installed on the outer surface of the cable.

[0049] By the attached Figure 7 As shown, the mounting bracket 1 also includes a bonding layer 15, and the bonding layer 15 is symmetrically installed on the inner walls of the bonding ring 11 and the rotating ring 12, and the bonding layer 15 is in contact with the outer surface of the cable. During use, the installation of multiple groups of bonding layers 15 ensures that when the bonding ring 11 and the rotating ring 12 are in contact with the outer surface of the cable, excessive extrusion will not occur, causing damage to the outer skin of the cable and affecting the overall use effect of the cable.

[0050] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the scope of protection determined by the claims submitted for the present invention.

Claims

1. A cable excavation prevention alarm device, comprising a mounting bracket (1), an outer shell (2), a sliding portion (3) and a linkage rod (4), wherein the outer shell (2) is mounted on the top of the mounting bracket (1), the sliding portion (3) is slidably mounted at the top opening of the outer shell (2), the linkage rod (4) is mounted on the bottom end of the sliding portion (3), and the linkage rod (4) slides inside the outer shell (2), characterized in that: A protection mechanism (6) for timely alarm and prompting is installed at the bottom end of the linkage rod (4), and the protection mechanism (6) includes a connecting base (61), a touch switch (62), an electrode seat (63) and a controller body (64). The connecting base (61) is fixedly installed inside the outer shell (2), the linkage rod (4) passes through the connecting base (61), the touch switch (62) is fixedly installed at the bottom end of the linkage rod (4), the electrode seat (63) is symmetrically installed on the lower surface of the connecting base (61), and the controller body (64) is installed inside the outer shell (2), and the controller body (64) is electrically connected to the electrode seat (63).

2. The cable anti-excavation alarm device according to claim 1 is characterized in that: The controller body (64) is composed of a control panel, a GPS module and an alarm module. The control panel is electrically connected to the electrode seat (63), the GPS module is electrically connected to the control panel, the GPS module is used to prompt the current data location, and the alarm module is electrically connected to the control panel.

3. The cable anti-excavation alarm device according to claim 2 is characterized in that: The electrode seat (63) is composed of an electrical connection block and two groups of arc-shaped pieces. The electrical connection block is fixedly mounted on the lower surface of the connection base (61), and the arc-shaped pieces are symmetrically mounted on the lower surface of the electrical connection block.

4. The cable anti-excavation alarm device according to claim 3 is characterized in that: The alarm device further comprises a trigger mechanism (5), the trigger mechanism (5) comprising a protective top cover (51), a push top plate (52) and a spring group (53), the protective top cover (51) being mounted at the top opening of the outer shell (2), the push top plate (52) being mounted on the lower surface of the sliding part (3), the push top plate (52) sliding in the protective top cover (51), and the spring group (53) being arranged at the bottom end of the push top plate (52).

5. The cable anti-excavation alarm device according to claim 4 is characterized in that: The trigger mechanism (5) further comprises a pull rope (54), wherein the pull rope (54) is connected to the bottom end of the trigger switch (62), and a passage for connecting the pull rope (54) is provided inside the outer shell (2), and a pipeline for connecting with the pull rope (54) is installed on the side of the outer shell (2).

6. The cable anti-excavation alarm device according to claim 1, characterized in that: The alarm device further comprises a warning mechanism (7), the warning mechanism (7) comprising a connecting seat (71), a pushing frame (72), a smoke storage tube (73), a trigger member (74) and a mounting top plate (75), the mounting top plate (75) being mounted inside the outer shell (2), the trigger member (74) being symmetrically mounted on the lower surface of the mounting top plate (75), the connecting seat (71) being mounted outside the linkage rod (4), the pushing frame (72) being symmetrically fixedly mounted on both sides of the connecting seat (71), and the smoke storage tube (73) being mounted inside the pushing frame (72).

7. The cable anti-excavation alarm device according to claim 6, characterized in that: A sealing film is installed on one side of the top of the smoke storage tube (73) close to the trigger member (74) to prevent the smoke inside the smoke storage tube (73) from leaking, and the trigger member (74) is composed of a bottom plate and a conical plate, the bottom plate is installed at the bottom end of the mounting top plate (75), and the conical plate is installed on the lower surface of the bottom plate.

8. The cable anti-excavation alarm device according to claim 7, characterized in that: The warning mechanism (7) further comprises a guide frame (76) which is symmetrically fixedly mounted on the inner wall of the outer shell (2), and a plurality of guide frames (76) are provided. The smoke storage tube (73) slides up and down inside the guide frame (76).

9. The cable anti-excavation alarm device according to claim 1, characterized in that: The mounting bracket (1) comprises a fitting ring (11), a rotating ring (12), a fixed screw (13) and a nut (14); the fitting ring (11) is mounted on the bottom end of the outer shell (2); the rotating ring (12) is rotatably mounted on the end of the fitting ring (11); the fixing screw (13) is threadedly mounted on the sides of the fitting ring (11) and the rotating ring (12); the fixing screw (13) penetrates the fitting ring (11) and the rotating ring (12) at the same time; and the nut (14) is threadedly mounted on the end of the fixing screw (13).

10. The cable anti-excavation alarm device according to claim 9, characterized in that: The mounting bracket (1) further comprises a bonding layer (15), wherein the bonding layer (15) is symmetrically mounted on the inner walls of the bonding ring (11) and the rotating ring (12), and the bonding layer (15) is bonded to the outer surface of the cable.

Citation Information

Patent Citations

  • Underground cable breakage-proof alarm device

    CN114842600A

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