A testing device for cable trenches

Abstract

This invention belongs to the technical field of cable trench detection devices and discloses a detection device for cable trenches, including a mounting box. A support frame is fixedly mounted on the top surface of the mounting box, and a ventilation component is fixedly mounted on the top of the support frame. An oxygen sensor is movably connected to the left end of the ventilation component, and an air supply component is fixedly mounted inside the ventilation component. This invention utilizes the centrifugal force generated by the rotating connecting shaft when the device moves. This centrifugal force connects the power-off component to the power-on component, and then to the internal circuit of the drive motor. A transmission belt drives two transmission wheels, which in turn rotate the air supply component at the top of the ventilation component, drawing outside air into the ventilation component. This, in turn, causes airflow within the cable trench, forming an airflow that enters the ventilation component and contacts the oxygen sensor. The oxygen sensor detects the flowing air, increasing the device's oxygen content detection range. The device is simple to operate and reduces the workload of operators.

Description

Technical Field

[0001] This invention belongs to the technical field of cable trench testing devices, specifically a testing device for cable trenches. Background Technology

[0002] Cable trenches are underground pipelines used for laying and replacing power or telecommunications cables. When operators enter the cable trench for laying and maintenance, the oxygen content inside the trench must be tested first to avoid the operator suffocating due to low oxygen content.

[0003] In existing technologies, most detection devices measure the oxygen content in cable trenches using oxygen sensors. However, due to the slow airflow in cable trenches, most devices can only detect the oxygen content in the vicinity of the device. Since cable trenches are relatively long and narrow, and the operator's working range is wide, the operator needs to move the device within the cable trench to detect the oxygen content within the working range. This is complicated and increases the operator's workload.

[0004] In existing technologies, most detection devices measure the oxygen content in cable trenches by using oxygen sensors. However, most of these devices cannot simultaneously detect the air humidity in the cable trenches. If the air humidity is too high, water droplets may adhere to the oxygen sensor, which may obstruct the contact between the oxygen sensor and the air. This would prevent the device from successfully detecting the oxygen content in the cable trenches, thus reducing the detection effectiveness.

[0005] Existing detection devices operate by placing them inside cable trenches. However, the environment inside most cable trenches is complex, with potential dust particles floating in the air. Oxygen sensors typically only need to be tested before operators enter the cable trench, and are not required to detect oxygen content at other times. Since most oxygen sensors are directly exposed inside the cable trench, dust particles can adhere to them when testing is not needed. When the oxygen sensor is activated, the dust must be cleaned, complicating the process and reducing the device's efficiency. Summary of the Invention

[0006] The purpose of this invention is to provide a detection device for cable trenches to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a detection device for cable trenches, comprising a mounting box, a support frame fixedly mounted on the top surface of the mounting box, a ventilation component fixedly mounted on the top of the support frame, an oxygen sensor movably connected to the left end of the ventilation component, an air supply component fixedly mounted inside the ventilation component, a drive motor fixedly mounted in the middle of the mounting box, a first transmission wheel fixedly sleeved at the output end of the drive motor, a second transmission wheel fixedly sleeved at the right end of the air supply component, a transmission belt drivingly connecting the surfaces of the first and second transmission wheels, a hanger fixedly mounted on the bottom surface of the mounting box, a roller rotatably connected to the bottom end of the hanger, an acceleration component fixedly sleeved at the front end of the roller, a connecting shaft movably connected to the front end of the mounting box, a power connection component fixedly mounted in the middle of the mounting box, and a power disconnect component movably connected to the rear end of the connecting shaft.

[0008] Preferably, a placement tray is fixedly installed at the right end of the ventilation component, and desiccant particles are placed on the top surface of the placement tray.

[0009] Preferably, a fixing pipe is fixedly installed in the middle of the mounting box, a permanent magnet plate is fixedly installed at the bottom of the oxygen sensor, an electromagnetic plate is fixedly installed in the middle of the fixing pipe, and a connecting sleeve is fixedly installed between the mounting box and the ventilation assembly.

[0010] Preferably, the ventilation assembly includes an air outlet duct, which is fixedly installed at the top of the support frame. A connecting pipe is fixedly installed at the right end of the air outlet duct, and an installation pipe is fixedly installed at the right end of the connecting pipe. The bottom ends of the installation pipe and the connecting pipe are both fixedly installed inside the mounting box, and the oxygen sensor is movably connected to the bottom of the air outlet duct.

[0011] Preferably, the air supply assembly includes a connecting frame, which is fixedly installed in the inner cavity of the air outlet pipe. A rotating shaft is rotatably connected to the middle of the connecting frame. Fan blades are fixedly installed on the surface of the rotating shaft. The fan blades are movably connected inside the air outlet pipe. The right end of the rotating shaft is fixedly sleeved with a transmission wheel.

[0012] Preferably, the acceleration component includes an acceleration wheel one, which is fixedly sleeved on the front end of the roller, and an acceleration belt is drivenly connected to the surface of the acceleration wheel one. An acceleration wheel two is drivenly connected to the top end of the acceleration belt, and the acceleration wheel two is fixedly sleeved on the front end of the connecting shaft.

[0013] Preferably, the power connection assembly includes a fixing ring, which is fixedly installed in the middle of the mounting box. The inner cavity of the fixing ring is fixedly installed with a power connection ring, and the bottom end of the power connection ring is electrically connected to a connecting wire harness, which is electrically connected to the drive motor and the electromagnetic plate.

[0014] Preferably, the power-off assembly includes a connecting piece, which is movably connected to the rear end of the connecting shaft. A power-connecting terminal is fixedly installed on the right side of the connecting piece, and a return spring is fixedly installed on the left side of the connecting piece. The return spring is fixedly installed inside the connecting shaft.

[0015] Preferably, the electromagnetic plate is located directly below the permanent magnet plate, the electromagnetic plate and the permanent magnet plate are magnetically connected, and the oxygen sensor is movably connected inside the connecting sleeve.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. This invention utilizes the centrifugal force generated by the rotating connecting shaft during movement of the device. This centrifugal force connects the power-off component to the power-on component, which in turn connects the internal circuit of the drive motor. Through a transmission belt, the transmission wheel one and transmission wheel two are connected, causing the air supply component to rotate at the top of the ventilation component. This draws outside air into the ventilation component, thereby causing airflow in the cable trench. The resulting airflow enters the ventilation component and comes into contact with the oxygen sensor. The oxygen sensor detects the flowing air, increasing the device's oxygen content detection range. The operation is simple and reduces the labor intensity of the operator.

[0018] 2. This invention provides a placement tray on the right end of the ventilation assembly, on which desiccant particles are placed. When the air supply assembly draws in air, the air first comes into contact with the desiccant particles, which absorb moisture from the air, keeping the air entering the ventilation assembly dry. This prevents water droplets from being present on the oxygen sensor, ensuring smooth contact between the oxygen sensor and the air for detection, and improving the detection effect of the device.

[0019] 3. This invention uses a permanent magnet plate installed at the bottom of the oxygen sensor and magnetically connected to an electromagnetic plate. When the device is not performing a test, the roller will not rotate, thus preventing the connecting shaft from rotating and connecting the power supply assembly. At this time, the circuit inside the electromagnetic plate is in an open circuit state, and the oxygen sensor falls downward under the action of gravity, leaving the ventilation assembly and being wrapped by the connecting sleeve. This prevents the oxygen sensor from being directly exposed in the cable trench when not performing a test, thus preventing dust from adhering to the oxygen sensor. During use, there is no need to clean the dust, making operation simple and improving the working efficiency of the device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a cross-sectional view of the mounting box of the present invention;

[0022] Figure 3 This is a cross-sectional schematic diagram of the ventilation component of the present invention;

[0023] Figure 4 This is a cross-sectional schematic diagram of the fixing tube structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the connecting shaft connection of the structure of the present invention;

[0025] Figure 6 The structure of this invention Figure 5 Enlarged view of point A in the middle;

[0026] Figure 7 This is a cross-sectional view of the connecting shaft of the present invention;

[0027] Figure 8 The structure of this invention Figure 7 Enlarged diagram of point B in the middle.

[0028] In the diagram: 1. Mounting housing; 2. Support frame; 3. Ventilation assembly; 301. Air outlet duct; 302. Connecting pipe; 303. Mounting pipe; 4. Oxygen sensor; 5. Air supply assembly; 501. Connecting frame; 502. Rotating shaft; 503. Fan blade; 6. Drive motor; 7. Transmission wheel one; 8. Transmission wheel two; 9. Transmission belt; 10. Hanger; 11. Roller; 12. Acceleration assembly; 121. Acceleration wheel one; 122. Acceleration belt; 123. Acceleration wheel two; 13. Connecting shaft; 14. Power connection assembly; 141. Fixing ring; 142. Power connection ring; 143. Connecting wire harness; 15. Power off assembly; 151. Connecting piece; 152. Power connection terminal; 153. Return spring; 16. Placement tray; 17. Desiccant granules; 18. Fixing pipe; 19. Permanent magnet plate; 20. Electromagnetic plate; 21. Connecting sleeve. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] like Figures 1 to 8As shown, this embodiment of the invention provides a detection device for cable trenches, including a mounting housing 1. A support frame 2 is fixedly mounted on the top surface of the mounting housing 1. A ventilation assembly 3 is fixedly mounted on the top of the support frame 2. An oxygen sensor 4 is movably connected to the left end of the ventilation assembly 3. The oxygen sensor 4 is an AO2CiTicel model. In this technical solution, the oxygen sensor 4 is prior art and is not an important technical protection point, so it will not be described in detail here. An air supply assembly 5 is fixedly mounted inside the ventilation assembly 3. A drive motor 6 is fixedly mounted in the middle of the mounting housing 1. Model 6 is YE2-200L2-6. The output end of the drive motor 6 is fixedly sleeved with a transmission wheel 7. The right end of the air supply component 5 is fixedly sleeved with a transmission wheel 8. The surfaces of the transmission wheel 7 and the transmission wheel 8 are connected by a transmission belt 9. The bottom surface of the mounting box 1 is fixedly mounted with a hanger 10. The bottom end of the hanger 10 is rotatably connected with a roller 11. The front end of the roller 11 is fixedly sleeved with an acceleration component 12. The front end of the mounting box 1 is movably connected with a connecting shaft 13. The middle part of the mounting box 1 is fixedly mounted with a power connection component 14. The rear end of the connecting shaft 13 is movably connected with a power disconnect component 15.

[0031] The working principle and beneficial effects of the above technical solution are as follows: When the roller 11 rolls in the cable trench, it drives the connecting shaft 13 to rotate through the acceleration component 12, giving the connecting shaft 13 a certain centrifugal force. This causes the power-off component 15 to connect the circuit in the power-on component 14, energizing the drive motor 6 and driving the air supply component 5 to rotate. This draws in outside air through the ventilation component 3 to the right end and then discharges it from the left end. When the air comes into contact with the oxygen sensor 4, the oxygen sensor 4 detects the oxygen content in the air and transmits the detection result to the terminal. The device then moves... When in motion, the connecting shaft 13 rotates, generating centrifugal force, which in turn connects the power-off component 15 to the power-on component 14, and connects the internal circuit of the drive motor 6. Through the transmission belt 9, the transmission wheel 7 and the transmission wheel 8 are connected, which drive the air supply component 5 to rotate at the top of the ventilation component 3, drawing outside air into the ventilation component 3. This, in turn, causes the air in the cable trench to flow, forming an airflow that enters the ventilation component 3 and comes into contact with the oxygen sensor 4. The oxygen sensor 4 detects the flowing air, which can increase the detection range of oxygen content of the device. The operation is simple and reduces the labor intensity of the operator.

[0032] like Figure 3 As shown, in one embodiment, a placement tray 16 is fixedly installed on the right end of the ventilation assembly 3, and desiccant particles 17 are placed on the top surface of the placement tray 16.

[0033] The working principle and beneficial effects of the above technical solution are as follows: When air enters the right end of the ventilation component 3, it first comes into contact with the desiccant particles 17. The desiccant particles 17 absorb the moisture in the air, thereby driving the absorption of moisture in the air. By setting a placement tray 16 at the right end of the ventilation component 3 and placing the desiccant particles 17 on the placement tray 16, when the air supply component 5 draws in air, the air first comes into contact with the desiccant particles 17. The desiccant particles 17 absorb the moisture in the air, making the air entering the ventilation component 3 dry, avoiding the presence of water droplets on the oxygen sensor 4, thus ensuring that the oxygen sensor 4 can make smooth contact with the air and perform detection, improving the detection effect of the device. At the same time, when the device is not in use, it can be placed in a location where it can be directly exposed to sunlight outdoors to evaporate the moisture in the desiccant particles 17, realizing the reuse of the device. When the desiccant particles 17 absorb moisture, their color will gradually change from red to blue. The humidity of the air in the cable trench can be detected by judging the number of desiccant particles 17 that turn blue.

[0034] like Figure 2 As shown, in one embodiment, a fixing pipe 18 is fixedly installed in the middle of the mounting box 1, a permanent magnet plate 19 is fixedly installed at the bottom of the oxygen sensor 4, an electromagnetic plate 20 is fixedly installed in the middle of the fixing pipe 18, and a connecting sleeve 21 is fixedly installed between the mounting box 1 and the ventilation assembly 3.

[0035] The working principle and beneficial effects of the above technical solution are as follows: After the electromagnetic plate 20 is energized, it generates the same magnetic poles as the bottom end of the permanent magnet plate 19, thereby moving the oxygen sensor 4 upward and inserting it into the ventilation assembly 3; by installing the permanent magnet plate 19 at the bottom end of the oxygen sensor 4 and magnetically connecting it with the electromagnetic plate 20, when the device is not performing detection, the roller 11 will not rotate, and thus will not drive the connecting shaft 13 to rotate and connect the power connection assembly 14. At this time, the circuit in the electromagnetic plate 20 is in an open circuit state, and the oxygen sensor 4 falls downward under the action of gravity, leaving the ventilation assembly 3 and being wrapped by the connecting sleeve 21. This prevents the oxygen sensor 4 from being directly exposed in the cable trench when not performing detection, thus preventing dust from adhering to the oxygen sensor 4. During use, there is no need to clean the dust, making operation simple and improving the working efficiency of the device.

[0036] like Figure 2 As shown, in one embodiment, the ventilation assembly 3 includes an air outlet duct 301, which is fixedly installed at the top of the support frame 2. A connecting pipe 302 is fixedly installed at the right end of the air outlet duct 301, and an installation pipe 303 is fixedly installed at the right end of the connecting pipe 302. The bottom ends of the installation pipe 303 and the connecting pipe 302 are both fixedly installed inside the mounting box 1. The oxygen sensor 4 is movably connected to the bottom of the air outlet duct 301.

[0037] The working principle and beneficial effects of the above technical solution are as follows: it ensures that the multiple axes of the placement tray 16 are in a vertically upward state, thereby preventing the desiccant particles 17 from rolling off the installation tube 303 and ensuring that the device can successfully absorb moisture from the air.

[0038] like Figure 3 As shown, in one embodiment, the air supply assembly 5 includes a connecting frame 501, which is fixedly installed in the inner cavity of the air outlet pipe 301. A rotating shaft 502 is rotatably connected to the middle of the connecting frame 501. A fan blade 503 is fixedly installed on the surface of the rotating shaft 502. The fan blade 503 is movably connected in the air outlet pipe 301. The right end of the rotating shaft 502 is fixedly sleeved with the transmission wheel 8.

[0039] The working principle and beneficial effects of the above technical solution are as follows: When the transmission wheel 8 rotates, it drives the rotating shaft 502 to rotate. When the rotating shaft 502 rotates, it drives the fan blade 503 to rotate in the air outlet pipe 301, thereby blowing the air to the left and creating a negative pressure in the connecting pipe 302, drawing outside air into the installation pipe 303. Furthermore, by setting the diameter of the transmission wheel 8 to one-third of the diameter of the transmission wheel 7, the rotation of the fan blade 503 can be accelerated, thereby accelerating the air flow speed in the cable trench. At the same time, it can also achieve the effect of sending air from outside the cable trench into the cable trench, thus oxygenating the cable trench.

[0040] like Figure 1 As shown, in one embodiment, the acceleration assembly 12 includes an acceleration wheel 121, which is fixedly sleeved on the front end of the roller 11. An acceleration belt 122 is drivenly connected to the surface of the acceleration wheel 121, and an acceleration wheel 123 is drivenly connected to the top end of the acceleration belt 122. The acceleration wheel 123 is fixedly sleeved on the front end of the connecting shaft 13.

[0041] The working principle and beneficial effects of the above technical solution are as follows: When the roller 11 rotates, it drives the first acceleration wheel 121 to rotate. The acceleration wheel 121 and the second acceleration wheel 123 are connected by the acceleration belt 122, which can drive the second acceleration wheel 123 to rotate, thereby driving the connecting shaft 13 to rotate. Setting the diameter of the first acceleration wheel 121 to five times the diameter of the second acceleration wheel 123 can accelerate the rotation of the connecting shaft 13, ensuring that the connecting shaft 13 has sufficient centrifugal force to throw out the connecting piece 151 and the electrical terminal 152, thus ensuring the smooth operation of the device.

[0042] like Figure 6 As shown, in one embodiment, the power connection assembly 14 includes a fixing ring 141, which is fixedly installed in the middle of the mounting housing 1. A power connection ring 142 is fixedly installed in the inner cavity of the fixing ring 141. A connecting wire harness 143 is electrically connected to the bottom end of the power connection ring 142. The connecting wire harness 143 is electrically connected to the drive motor 6 and the electromagnetic plate 20.

[0043] The working principle and beneficial effects of the above technical solution are as follows: After the power-off component 15 is thrown out from the connecting shaft 13, it connects the two power-connecting rings 142, and then connects the circuit in the connecting wire harness 143 to supply power to the electromagnetic plate 20 and the drive motor 6, thereby realizing the automatic power-on of the device and improving the automation level of the device.

[0044] like Figure 8 As shown, in one embodiment, the power-off assembly 15 includes a connecting piece 151, which is movably connected to the rear end of the connecting shaft 13. A power terminal 152 is fixedly installed on the right side of the connecting piece 151, and a reset spring 153 is fixedly installed on the left side of the connecting piece 151. The reset spring 153 is fixedly installed inside the connecting shaft 13.

[0045] The working principle and beneficial effects of the above technical solution are as follows: When the connecting shaft 13 rotates, the centrifugal force generated can throw the connecting piece 151 and the power terminal 152 out of the connecting shaft 13, and make the power terminal 152 contact the power ring 142, thereby connecting the two power rings 142. When the connecting shaft 13 stops rotating, the return spring 153, which is in the pull rope state, pulls the power terminal 152 back through the connecting piece 151 under the action of elasticity. This realizes the automatic power cut-off of the drive motor 6 and the electromagnetic plate 20 when the device is not moving, reducing unnecessary consumption of the device.

[0046] like Figure 3 As shown, in one embodiment, the electromagnetic plate 20 is located directly below the permanent magnet plate 19, and the electromagnetic plate 20 and the permanent magnet plate 19 are magnetically connected. The oxygen sensor 4 is movably connected inside the connecting sleeve 21.

[0047] The working principle and beneficial effects of the above technical solution are as follows: the connecting sleeve 21 is used to position and guide the oxygen sensor 4, and at the same time, the oxygen sensor 4 is wrapped. When the electromagnetic plate 20 is energized, it generates magnetism on the permanent magnet plate 19, causing the permanent magnet plate 19 to move the oxygen sensor 4 upward for detection. When the electromagnetic plate 20 is de-energized, the gravity of the permanent magnet plate 19 and the oxygen sensor 4 pulls the oxygen sensor 4 downward and into the connecting sleeve 21.

[0048] Working principle and usage process:

[0049] Push the mounting box 1 to make the roller 11 roll in the cable trench, and then drive the connecting shaft 13 to rotate through the acceleration component 12, so that the connecting shaft 13 has a certain centrifugal force, and then connect the circuit in the power disconnect component 14 to the power connection component 14, and energize the electromagnetic plate 20 and the drive motor 6.

[0050] When the electromagnetic plate 20 is energized, it generates the same magnetic poles as the bottom of the permanent magnet plate 19, which in turn moves the oxygen sensor 4 upward and inserts it into the ventilation assembly 3. When the drive motor 6 is energized, it drives the air supply assembly 5 to rotate through the transmission belt 9, thereby drawing in outside air through the ventilation assembly 3 to the right end and then expelling it from the left end of the ventilation assembly 3. When the air enters the right end of the ventilation assembly 3, it first comes into contact with the desiccant particles 17. The desiccant particles 17 absorb the moisture in the air, which in turn leads to the absorption of moisture in the air. When the air comes into contact with the oxygen sensor 4, the oxygen sensor 4 detects the oxygen content in the air and transmits the detection result to the terminal.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detection device for cable trenches, comprising a mounting housing (1), characterized in that: A support frame (2) is fixedly installed on the top surface of the mounting box (1). A ventilation assembly (3) is fixedly installed on the top of the support frame (2). An oxygen sensor (4) is movably connected to the left end of the ventilation assembly (3). An air supply assembly (5) is fixedly installed in the inner cavity of the ventilation assembly (3). A drive motor (6) is fixedly installed in the middle of the mounting box (1). A transmission wheel (7) is fixedly sleeved on the output end of the drive motor (6). A transmission wheel (8) is fixedly sleeved on the right end of the air supply assembly (5). A transmission belt (9) is connected to the surface of the first driving wheel (7) and the second transmission wheel (8). A hanger (10) is fixedly installed on the bottom surface of the mounting box (1). A roller (11) is rotatably connected to the bottom end of the hanger (10). An acceleration component (12) is fixedly sleeved on the front end of the roller (11). A connecting shaft (13) is movably connected to the front end of the mounting box (1). A power connection component (14) is fixedly installed in the middle of the mounting box (1). A power disconnect component (15) is movably connected to the rear end of the connecting shaft (13). A fixing pipe (18) is fixedly installed in the middle of the mounting box (1), a permanent magnet plate (19) is fixedly installed at the bottom of the oxygen sensor (4), an electromagnetic plate (20) is fixedly installed in the middle of the fixing pipe (18), and a connecting sleeve (21) is fixedly installed between the mounting box (1) and the ventilation assembly (3). When the roller (11) rolls in the cable trench, it drives the connecting shaft (13) to rotate via the acceleration component (12). This causes the power terminal (152) of the power-off component (15) at the rear end of the connecting shaft (13) to be thrown outward by centrifugal force, thus connecting with the circuit inside the power-off component (14). This powers the drive motor (6) to rotate the air supply component (5) and powers the electromagnetic plate (20) to push the permanent magnet plate (19) and the oxygen sensor ( 4) Rise into the ventilation assembly (3); when the roller does not roll, the power terminal (152) of the power-off assembly (15) is pulled back into the connecting shaft (13), the power terminal (152) is disconnected from the power connection assembly (14), the drive motor (6) and the electromagnetic plate (20) are both de-energized, the oxygen sensor (4) falls downward under the action of gravity, leaves the ventilation assembly (3), and is wrapped by the connecting sleeve (21).

2. The detection device for cable trenches according to claim 1, characterized in that: A placement tray (16) is fixedly installed on the right end of the ventilation component (3), and desiccant particles (17) are placed on the top surface of the placement tray (16).

3. The detection device for cable trenches according to claim 1, characterized in that: The ventilation assembly (3) includes an air outlet pipe (301), which is fixedly installed at the top of the support frame (2). A connecting pipe (302) is fixedly installed at the right end of the air outlet pipe (301), and an installation pipe (303) is fixedly installed at the right end of the connecting pipe (302). The bottom ends of the installation pipe (303) and the connecting pipe (302) are both fixedly installed inside the mounting box (1). The oxygen sensor (4) is movably connected to the bottom of the air outlet pipe (301).

4. The detection device for cable trenches according to claim 3, characterized in that: The air supply assembly (5) includes a connecting frame (501), which is fixedly installed in the inner cavity of the air outlet pipe (301). A rotating shaft (502) is rotatably connected to the middle of the connecting frame (501). A fan blade (503) is fixedly installed on the surface of the rotating shaft (502). The fan blade (503) is movably connected in the air outlet pipe (301). The right end of the rotating shaft (502) is fixedly sleeved with the second transmission wheel (8).

5. The detection device for cable trenches according to claim 1, characterized in that: The acceleration assembly (12) includes an acceleration wheel (121), which is fixedly sleeved on the front end of the roller (11). An acceleration belt (122) is connected to the surface of the acceleration wheel (121), and an acceleration wheel (123) is connected to the top end of the acceleration belt (122). The acceleration wheel (123) is fixedly sleeved on the front end of the connecting shaft (13).

6. The detection device for cable trenches according to claim 1, characterized in that: The power-off assembly (15) includes a connecting piece (151), which is movably connected to the rear end of the connecting shaft (13). A power terminal (152) is fixedly installed on the right side of the connecting piece (151), and a reset spring (153) is fixedly installed on the left side of the connecting piece (151). The reset spring (153) is fixedly installed inside the connecting shaft (13).

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