A tunnel ventilation duct support mechanism

Abstract

The application discloses a tunnel ventilation pipeline supporting mechanism and relates to the technical field of tunnel engineering. The tunnel ventilation pipeline supporting mechanism comprises a clamping supporting piece, the upper side of the clamping supporting piece is provided with a lifting rod, the upper end of the lifting rod is provided with a rotary driving head, one side of the lifting rod is provided with an anti-dropping clamp, the rotary driving head comprises a half worm wheel and a concave seat hinged between the upper ends of the two sides of the lifting rod, the concave seat is fixed on the top of a tunnel through bolts, the half worm wheel is fixedly arranged at the upper end of the lifting rod, the front side of the concave seat is provided with a limiting seat, a handle two is rotationally arranged on one side of the limiting seat, one end of the handle two is connected with a worm, and the worm is engaged with the half worm wheel. The tunnel ventilation pipeline supporting mechanism can drive the half worm wheel to rotate through the worm, can drive the lifting rod to rotate, can adjust the supporting angle of the clamping supporting piece, can support the pipeline to different positions instead of being limited to a horizontal position, and the application range of the supporting mechanism is improved.

Description

Technical Field

[0001] This invention relates to the field of tunnel engineering technology, specifically to a tunnel ventilation duct support mechanism. Background Technology

[0002] With the rapid development of my country's rail transit and the construction of urban subways, tunnel construction is becoming increasingly common. During tunnel construction, factors such as drilling, blasting, muck loading, shotcreting, exhaust from internal combustion machinery and transport vehicles, and the release of harmful gases from the strata during excavation significantly reduce the oxygen level inside the tunnel, creating a mixture of harmful gases and rock dust, resulting in polluted air. As tunnels are continuously excavated and extended inward, the temperature and humidity inside increase accordingly, seriously impacting the health of workers inside the tunnel. Therefore, it is necessary to add ventilation ducts to ventilate the tunnels.

[0003] Chinese Patent Publication No. CN217422416U, a utility model belonging to the field of tunnel engineering technology, specifically discloses a ventilation duct support mechanism for tunnels. The mechanism includes a mounting plate with a semi-circular fixing seat below it. Adjustment mechanisms for adjusting the height of the semi-circular fixing seat are located at the four corners of the lower end face of the mounting plate. First threaded rods are threadedly connected to both side walls of the semi-circular fixing seat. A first fastening block is fixedly connected to one end of each threaded rod, and a first arc-shaped plate is rotatably connected to the other end of each threaded rod via a bearing. Two first guide rods are symmetrically fixed to the side walls of each arc-shaped plate. The end of each guide rod away from the arc-shaped plate slides through the adjacent side wall of the semi-circular fixing seat. This utility model, by using support columns and adjustable bolts, allows for height adjustment of the semi-circular fixing seat, making it easier for workers to quickly install ventilation ducts into the semi-circular fixing seat and increasing work efficiency.

[0004] When adjusting the height of this pipe support device, four supports need to be adjusted in sequence to adjust the pipe to the required height, which is a cumbersome operation. In addition, the support device can only support the pipe in a horizontal position. When the pipe is in an inclined position, it cannot support the pipe. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a tunnel ventilation duct support mechanism that solves the problems of cumbersome height adjustment and the fact that traditional tunnel duct support devices can only support ducts in the horizontal direction.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a tunnel ventilation duct support mechanism, comprising a clamping support member, wherein a lifting rod is provided on the upper side of the clamping support member, a rotary drive head is provided at the upper end of the lifting rod, and an anti-detachment clip is provided on one side of the lifting rod.

[0007] As a further embodiment of the present invention: the rotary drive head includes a semi-worm gear and a concave seat hinged between the two sides of the upper end of the lifting rod. The concave seat is fixed to the top of the tunnel by bolts. The semi-worm gear is fixedly set at the upper end of the lifting rod. A limit seat is provided on the front side of the concave seat. A handle is rotatably provided on one side of the limit seat. One end of the handle is connected to a worm, and the worm meshes with the semi-worm gear.

[0008] As a further aspect of the present invention: the semi-worm gear is arc-shaped and disposed at the upper end of the lifting rod, and the center of the semi-worm gear and the center of rotation of the limiting cylinder are located at the same position.

[0009] As a further aspect of the present invention: an angle ruler plate is rotatably provided on one side of the concave seat, and one end of the angle ruler plate is connected to the lifting rod, so that the angle ruler plate will rotate when the lifting rod rotates. A pointer is provided on one side of the concave seat above the angle ruler plate, and the pointer points to the scale value on the angle ruler plate.

[0010] As a further aspect of the present invention: the lifting rod includes a limiting cylinder, a threaded sleeve is slidably installed inside the limiting cylinder, and a screw adapted to the threaded sleeve is rotatably arranged inside the limiting cylinder, the threaded sleeve being screwed to the outside of the screw by threads.

[0011] As a further embodiment of the present invention: a handle is rotatably mounted on the front side of the upper end of the limiting cylinder, and a main bevel gear is connected to one end of the handle at the internal position of the limiting cylinder. A driven bevel gear adapted to the main bevel gear is provided on the outer side of the upper end of the screw, and the driven bevel gear meshes with the main bevel gear.

[0012] As a further embodiment of the present invention: the anti-detachment clip includes an anti-detachment gear rotatably disposed on one side of the concave seat and a fixed seat fixedly disposed on one side of the concave seat. A winding wheel is rotatably mounted on the middle of one side of the anti-detachment gear, and a handle is provided on one side of the winding wheel. A knob is rotatably mounted on the upper part of the fixed seat, and a bolt rod is connected to the lower end of the knob. The bolt rod is located above the anti-detachment gear.

[0013] As a further embodiment of the present invention: the clamping support includes a semicircular plate one and a semicircular plate two. Both sides of the semicircular plate one are provided with protrusions two, and both sides of the semicircular plate two are provided with protrusions one. The protrusions two on one side of the semicircular plate one and the protrusions one on one side of the semicircular plate two are hinged together, and the protrusions two on the other side of the semicircular plate one and the protrusions one on the other side of the semicircular plate two are fixedly connected by fixing bolts.

[0014] As a further aspect of the present invention: the inner side of the winding wheel is provided with bolt holes, and the bottom of the protrusion on the other side of the semicircular plate is provided with an anti-derailment rope, one end of which is connected to a bolt head that matches the bolt holes.

[0015] As a further embodiment of the present invention: a top ball is provided on the upper part of the protrusion on one side of the semicircular plate, a groove is provided at the bottom of the protrusion on one side of the semicircular plate, an elastic pad is provided on the top side inside the groove, and a pressure sensor is provided at the lower part of the elastic pad.

[0016] As a further aspect of the present invention: the pressure sensor is electrically connected to a microcontroller, and the microcontroller is connected to a back-end terminal through a communication module.

[0017] Turning the handle causes the worm gear to rotate, which in turn drives the half-worm wheel meshing with it to rotate. The half-worm wheel then drives the lifting rod to rotate, which in turn drives the clamping support at the lower end of the lifting rod to rotate. Depending on the position of the pipe, it can be adjusted to the corresponding support angle position. When the lifting rod rotates, it drives the angle scale plate to rotate, and the pointer will point to the scale value on the angle scale plate, so that the range of angle adjustment can be accurately known.

[0018] After the angle is adjusted, turning the handle will drive the main bevel gear to rotate, which in turn drives the driven bevel gear meshing with it to rotate. The driven bevel gear will then drive the screw to rotate, which in turn drives the threaded sleeve to rotate. This allows the length of the lifting rod to be adjusted, thus achieving height adjustment to the height of the pipe support.

[0019] After the height is adjusted, the tunnel pipe is placed between semicircular plate one and semicircular plate two. Then, semicircular plate two is rotated so that semicircular plate one and semicircular plate two cover the pipe. After covering, semicircular plate one and the fixing bolts are fixed together to support the pipe.

[0020] After the pipe is supported, the top ball will press against the pressure sensor, causing the pressure sensor to generate a pressure value. At the same time, the bolt head at one end of the anti-derailment rope is fixed in the bolt hole on the winding wheel. Then, turn the handle three to drive the winding wheel to rotate. The winding wheel will wind up the anti-derailment rope and tighten it. In this way, the anti-derailment rope will pull the semi-circular plate two. After the semi-circular plate two is pulled, turn the knob to drive the bolt rod to rotate, so that the lower end of the bolt rod is locked onto the anti-derailment gear.

[0021] A warning signal is set on the microcontroller. When the pressure value of the pressure sensor is zero, the pressure sensor will transmit the signal to the microcontroller. If the fixing bolt is loose or falls off, the semicircular plate one and semicircular plate two will loosen, and the top ball will leave the bottom of the pressure sensor. At this time, the pressure value of the pressure sensor is zero, the microcontroller will receive the signal, and then the microcontroller will transmit the signal to the terminal in the duty room to remind the staff so that the staff can be aware of the situation in time and go to the site for maintenance.

[0022] When the semicircular plate one and semicircular plate two become loose, the winding wheel will not rotate because the bolt rod is stuck on the anti-detachment gear. At this time, the anti-detachment rope will pull the semicircular plate two, so that the semicircular plate two can still support the pipe, thus preventing the pipe from falling and protecting the pipe.

[0023] This invention provides a tunnel ventilation duct support mechanism, which has the following advantages compared with the prior art:

[0024] 1. The tunnel ventilation duct support mechanism drives the semi-worm gear to rotate via a worm gear, which in turn drives the lifting rod to rotate. This allows for adjustment of the support angle of the clamping support, enabling the duct to be supported in different positions rather than being limited to a horizontal position, thus improving the applicability of the support mechanism.

[0025] 2. When the height of the tunnel ventilation duct support needs to be adjusted, the height of the duct support can be quickly adjusted by simply turning the handle, which solves the problem of cumbersome height adjustment of traditional tunnel duct support.

[0026] 3. When the fixing bolts on the clamping support of the tunnel ventilation duct support mechanism become loose, the anti-derailment rope will pull the semi-circular plate two to keep it supporting the bottom of the duct and prevent the duct from falling. The loosening of the fixing bolts can be detected online and an early warning message can be sent to the background in time to remind the staff to come to the site for maintenance. The anti-derailment rope can also be adjusted according to the height of the support. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the lifting rod and rotary drive head structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the anti-detachment clip of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the clamping support member of the present invention;

[0031] Figure 5 This is a schematic diagram of the installation of the semicircular plate one and semicircular plate two structures of the present invention;

[0032] Figure 6 For the present invention Figure 5 A magnified view of the structure at point A in the middle.

[0033] In the diagram: 1. Clamping support; 11. Semicircular plate one; 12. Semicircular plate two; 13. Protrusion one; 131. Top ball; 14. Protrusion two; 141. Groove; 142. Elastic pad; 143. Pressure sensor; 144. Microcontroller; 15. Fixing bolt; 16. Anti-detachment rope; 17. Bolt head; 2. Lifting rod; 21. Limiting sleeve; 22. Handle one; 23. Threaded sleeve; 24. Screw; 25. Driven bevel gear; 26. Main bevel gear; 3. Rotary drive head; 31. Concave seat; 32. Semi-worm gear; 33. Limiting seat; 34. Handle two; 35. Worm; 36. Angle ruler plate; 37. Pointer; 4. Anti-detachment clip; 41. Anti-detachment gear; 42. Rewinding wheel; 43. Handle three; 44. Bolt hole; 45. Fixing seat; 46. Knob; 47. Bolt rod. Detailed Implementation

[0034] 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.

[0035] Please see Figure 1-6 This invention provides four technical solutions:

[0036] Example 1

[0037] Please see Figure 1 In this embodiment of the invention, a tunnel ventilation duct support mechanism includes a clamping support 1, a lifting rod 2 is provided on the upper side of the clamping support 1, a rotary drive head 3 is provided at the upper end of the lifting rod 2, and an anti-detachment clip 4 is provided on one side of the lifting rod 2.

[0038] Please see Figure 2 In this embodiment of the invention, the rotary drive head 3 includes a semi-worm gear 32 and a concave seat 31 hinged between the two sides of the upper end of the lifting rod 2. The concave seat 31 is fixed to the top of the tunnel by bolts. The semi-worm gear 32 is fixedly installed at the upper end of the lifting rod 2. A limit seat 33 is provided on the front side of the concave seat 31. A handle 34 is rotatably provided on one side of the limit seat 33. One end of the handle 34 is connected to a worm 35. The worm 35 meshes with the semi-worm gear 32. Rotating the handle 34 drives the worm 35 to rotate. The worm 35 drives the semi-worm gear 32 to rotate. The semi-worm gear 32 then drives the lifting rod 2 to rotate, which in turn drives the clamping support 1 at the lower end of the lifting rod 2 to rotate. According to the position of the pipeline, it is adjusted to the corresponding support angle position. When the lifting rod 2 rotates, it drives the angle ruler 36 to rotate. The pointer 37 will point to the scale value on the angle ruler 36, so that the range of angle adjustment can be accurately known.

[0039] Please see Figure 2 In this embodiment of the invention, the semi-worm gear 32 is arc-shaped and is set at the upper end of the lifting rod 2. The center of the semi-worm gear 32 and the center of rotation of the limiting cylinder 21 are located at the same position. When the worm 35 drives the semi-worm gear 32 that meshes with it to rotate, the semi-worm gear 32 will drive the lifting rod 2 to rotate, thereby realizing the adjustment of the pipe support angle.

[0040] Please see Figure 2 In this embodiment of the invention, an angle ruler plate 36 is rotatably provided on one side of the concave seat 31. One end of the angle ruler plate 36 is connected to the lifting rod 2, so that when the lifting rod 2 rotates, it will drive the angle ruler plate 36 to rotate. A pointer 37 is provided on one side of the concave seat 31 above the angle ruler plate 36. The pointer 37 points to the scale value on the angle ruler plate 36. Angle values ​​are set on the angle ruler plate 36. When the lifting rod 2 rotates, it will drive the angle ruler plate 36 to rotate. When it rotates to the required angle, the pointer 37 will point to the corresponding angle value on the angle ruler plate 36, so that the staff can easily know the value of the angle adjustment.

[0041] Example 2 differs from Example 1 in that:

[0042] Please see Figure 2 In this embodiment of the invention, the lifting rod 2 includes a limiting cylinder 21. A threaded sleeve 23 is slidably installed inside the limiting cylinder 21, and a screw 24 adapted to the threaded sleeve 23 is rotatably installed inside the limiting cylinder 21. The threaded sleeve 23 is screwed to the outside of the screw 24 by threads. A handle 22 is rotatably installed on the front side of the upper end of the limiting cylinder 21. A main bevel gear 26 is connected to one end of the handle 22 at the position inside the limiting cylinder 21. A driven bevel gear 25 adapted to the main bevel gear 26 is provided on the outside of the upper end of the screw 24. The driven bevel gear 25 meshes with the main bevel gear 26. Rotating the handle 22 drives the main bevel gear 26 to rotate, which in turn drives the driven bevel gear 25 to rotate. The driven bevel gear 25 drives the screw 24 to rotate, and the screw 24 drives the threaded sleeve 23 to rotate. This allows the length of the lifting rod 2 to be adjusted, thereby achieving height adjustment to the height of the pipe support, so that the pipe can be ventilated at different height positions.

[0043] Example 3 differs from Examples 1 and 2 in that:

[0044] Please see Figure 3-4In this embodiment of the invention, the anti-detachment clip 4 includes an anti-detachment gear 41 rotatably disposed on one side of the concave seat 31 and a fixed seat 45 fixedly disposed on one side of the concave seat 31. A winding wheel 42 is rotatably mounted on the middle of one side of the anti-detachment gear 41, and a handle 43 is provided on one side of the winding wheel 42. A knob 46 is rotatably mounted on the upper part of the fixed seat 45, and a bolt rod 47 is connected to the lower end of the knob 46. The bolt rod 47 is located above the anti-detachment gear 41. When the knob 46 is turned to drive the bolt rod 47 to rotate, the bolt rod 47 can be locked into the anti-detachment gear 41. A bolt hole 44 is provided on the inner side of the winding wheel 42. An anti-detachment rope 16 is provided at the bottom of the protrusion 13 on the other side of the semi-circular plate 12. One end of the anti-detachment rope 16 is connected to a bolt head 17 that matches the bolt hole 44. The bolt head 17 at one end of the anti-derailment rope 16 is fixed in the bolt hole 44 on the winding wheel 42. Then, the handle 3 43 is turned to drive the winding wheel 42 to rotate, and the winding wheel 42 winds up the anti-derailment rope 16 to tighten it. In this way, the anti-derailment rope 16 will hold the semi-circular plate 2 12. After the semi-circular plate 2 12 is held, the knob 46 is turned to drive the bolt rod 47 to rotate, so that the lower end of the bolt rod 47 is locked onto the anti-derailment gear 41. When the semi-circular plate 1 11 and the semi-circular plate 2 12 become loose, the winding wheel 42 will not rotate because the bolt rod 47 is locked onto the anti-derailment gear 41. At this time, the anti-derailment rope 16 will hold the semi-circular plate 2 12, so that the semi-circular plate 2 12 can still support the pipe. In this way, the pipe will not fall and the pipe will be protected.

[0045] Please see Figure 4 In this embodiment of the invention, the clamping support 1 includes a semicircular plate 11 and a semicircular plate 12. Both sides of the semicircular plate 11 are provided with protrusions 14, and both sides of the semicircular plate 12 are provided with protrusions 13. The protrusions 14 on one side of the semicircular plate 11 and 13 on one side of the semicircular plate 12 are hinged together, and the protrusions 14 on the other side of the semicircular plate 11 and 13 on the other side of the semicircular plate 12 are fixedly connected by fixing bolts 15. The tunnel pipe is placed between the semicircular plate 11 and the semicircular plate 12. Then, the semicircular plate 12 is rotated so that the semicircular plate 11 and the semicircular plate 12 enclose the pipe. After enclosing, the semicircular plate 11 and the fixing bolts 15 are fixed together, thereby supporting the pipe.

[0046] Example 4 differs from Examples 1, 2, and 3 in that:

[0047] Please see Figure 5-6In this embodiment of the invention, a top ball 131 is provided on the upper part of the protrusion 13 on one side of the semicircular plate 12, and a groove 141 is provided at the bottom of the protrusion 14 on one side of the semicircular plate 11. An elastic pad 142 is provided on the top side inside the groove 141, and a pressure sensor 143 is provided at the lower part of the elastic pad 142. When the semicircular plate 11 and the semicircular plate 12 are put together, they form a circle, which can perfectly cover the tunnel pipe. After covering, the top ball 131 can just support the pressure sensor 143. After the pipe is supported, the top ball 131... 31 will press against the pressure sensor 143, causing the pressure sensor 143 to generate a pressure value. At the same time, the bolt head 17 at one end of the anti-derailment rope 16 will be fixed in the bolt hole 44 on the winding wheel 42. Then, turn the handle 3 43 to drive the winding wheel 42 to rotate. The winding wheel 42 will wind up the anti-derailment rope 16 and tighten it. In this way, the anti-derailment rope 16 will pull the semi-circular plate 2 12. After the semi-circular plate 2 12 is pulled, turn the knob 46 to drive the bolt rod 47 to rotate, so that the lower end of the bolt rod 47 is locked onto the anti-derailment gear 41.

[0048] Please see Figure 5-6 In this embodiment of the invention, the pressure sensor 143 is electrically connected to the microcontroller 144, and the microcontroller 144 is connected to the backend terminal through a communication module. The method by which the microcontroller 144 transmits the signal from the pressure sensor 143 to the backend terminal to issue an early warning is as follows: During the input sampling stage, the microcontroller 144 sequentially reads all the input states and data of the pressure sensor 143 in a scanning manner and stores them in the corresponding units in the I / O image area. After the input sampling is completed, it enters the user program execution and output refresh stage. During the user program execution stage, the microcontroller 144 always scans the user program sequentially in a top-down order. After the user program is scanned, the microcontroller 144 enters the output refresh stage. During this period, the CPU refreshes all the output latch circuits according to the corresponding states and data in the I / O image area, and then drives the corresponding peripherals through the output circuit to transmit the signal to the backend terminal to issue an early warning signal. The method by which the microcontroller 144 transmits the signal to the backend terminal is already existing technology, and therefore will not be described in detail.

[0049] Working principle: Turning handle 2 34 drives the worm 35 to rotate, the worm 35 drives the half worm wheel 32 that meshes with it to rotate, the half worm wheel 32 drives the lifting rod 2 to rotate, and then drives the clamping support 1 at the lower end of the lifting rod 2 to rotate. According to the position of the pipe, it is adjusted to the corresponding support angle position. When the lifting rod 2 rotates, it drives the angle scale plate 36 to rotate, and the pointer 37 will point to the scale value on the angle scale plate 36, so that the range of angle adjustment can be accurately known.

[0050] After the angle is adjusted, turn the handle 22 to drive the main bevel gear 26 to rotate. The main bevel gear 26 drives the driven bevel gear 25 that meshes with it to rotate. The driven bevel gear 25 drives the screw 24 to rotate. The screw 24 drives the threaded sleeve 23 to rotate, thereby adjusting the length of the lifting rod 2 and realizing the height adjustment, adjusting it to the height of the pipe support.

[0051] After the height is adjusted, the tunnel pipe is placed between semicircular plate 11 and semicircular plate 212. Then, semicircular plate 212 is rotated so that semicircular plate 11 and semicircular plate 212 cover the pipe. After covering, semicircular plate 11 and semicircular plate 212 are fixed together with fixing bolts 15 to support the pipe.

[0052] After the pipe is supported, the top ball 131 will press against the pressure sensor 143, causing the pressure sensor 143 to generate a pressure value. At the same time, the bolt head 17 at one end of the anti-derailment rope 16 is fixed in the bolt hole 44 on the winding wheel 42. Then, turn the handle 3 43 to drive the winding wheel 42 to rotate. The winding wheel 42 winds up the anti-derailment rope 16 and tightens it. In this way, the anti-derailment rope 16 will pull the semi-circular plate 2 12. After the semi-circular plate 2 12 is pulled, turn the knob 46 to drive the bolt rod 47 to rotate, so that the lower end of the bolt rod 47 is locked onto the anti-derailment gear 41.

[0053] A warning signal is set on the microcontroller 144. When the pressure value of the pressure sensor 143 is zero, the pressure sensor 143 will transmit the signal to the microcontroller 144. If the fixing bolt 15 is loose or falls off, the semicircular plate 11 and the semicircular plate 12 will loosen, and the top ball 131 will leave the bottom of the pressure sensor 143. At this time, the pressure value of the pressure sensor 143 is zero, the microcontroller 144 will receive the signal, and then the microcontroller 144 will transmit the signal to the terminal in the duty room to remind the staff so that the staff can be aware of the situation in time and arrive at the site for maintenance.

[0054] When the semicircular plate 11 and the semicircular plate 2 become loose, the winding wheel 42 will not rotate because the bolt rod 47 is stuck on the anti-detachment gear 41. At this time, the anti-detachment rope 16 will pull the semicircular plate 2 12, so that the semicircular plate 2 12 can still support the pipe, thus preventing the pipe from falling and protecting the pipe.

[0055] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A tunnel ventilation duct support mechanism, comprising a clamping support member (1), characterized in that: The clamping support (1) is provided with a lifting rod (2) on its upper side, and a rotary drive head (3) is provided at the upper end of the lifting rod (2). An anti-detachment clip (4) is provided on one side of the lifting rod (2). The rotary drive head (3) includes a semi-worm gear (32) and a concave seat (31) hinged between the two sides of the upper end of the lifting rod (2). The concave seat (31) is fixed to the top of the tunnel by bolts. The semi-worm gear (32) is fixedly set at the upper end of the lifting rod (2). A limit seat (33) is set on the front side of the concave seat (31). A handle (34) is rotatably set on one side of the limit seat (33). One end of the handle (34) is connected to a worm (35). The worm (35) meshes with the semi-worm gear (32). The lifting rod (2) includes a limiting cylinder (21), a threaded sleeve (23) is slidably installed inside the limiting cylinder (21), and a screw (24) adapted to the threaded sleeve (23) is rotatably installed inside the limiting cylinder (21). The threaded sleeve (23) is screwed to the outside of the screw (24) by threads. A handle (22) is rotatably mounted on the front side of the upper end of the limiting cylinder (21). One end of the handle (22) is connected to a main bevel gear (26) at the internal position of the limiting cylinder (21). A driven bevel gear (25) adapted to the main bevel gear (26) is provided on the outer side of the upper end of the screw (24). The driven bevel gear (25) meshes with the main bevel gear (26). The anti-detachment clip (4) includes an anti-detachment gear (41) rotatably disposed on one side of the concave seat (31) and a fixed seat (45) fixedly disposed on one side of the concave seat (31). A winding wheel (42) is rotatably installed in the middle of one side of the anti-detachment gear (41). A handle (43) is provided on one side of the winding wheel (42). A knob (46) is rotatably installed on the upper part of the fixed seat (45). A bolt rod (47) is connected to the lower end of the knob (46). The bolt rod (47) is located above the anti-detachment gear (41). The clamping support (1) includes a semicircular plate one (11) and a semicircular plate two (12). Both sides of the semicircular plate one (11) are provided with protrusion two (14), and both sides of the semicircular plate two (12) are provided with protrusion one (13). The protrusion two (14) on one side of the semicircular plate one (11) and the protrusion one (13) on one side of the semicircular plate two (12) are hinged together, and the protrusion two (14) on the other side of the semicircular plate one (11) and the protrusion one (13) on the other side of the semicircular plate two (12) are fixedly connected by fixing bolts (15).

2. The tunnel ventilation duct support mechanism according to claim 1, characterized in that: The semi-worm gear (32) is arc-shaped and is located at the upper end of the lifting rod (2), and the center of the semi-worm gear (32) is at the same position as the center of rotation of the limiting cylinder (21).

3. The tunnel ventilation duct support mechanism according to claim 1, characterized in that: An angle ruler plate (36) is rotatably provided on one side of the concave seat (31). One end of the angle ruler plate (36) is connected to the lifting rod (2), so that when the lifting rod (2) rotates, it will drive the angle ruler plate (36) to rotate. A pointer (37) is provided on one side of the concave seat (31) above the angle ruler plate (36). The pointer (37) points to the scale value on the angle ruler plate (36).

4. The tunnel ventilation duct support mechanism according to claim 1, characterized in that: The inner side of the winding wheel (42) is provided with bolt holes (44), and the bottom of the protrusion (13) on the other side of the semicircular plate (12) is provided with an anti-detachment rope (16). One end of the anti-detachment rope (16) is connected to a bolt head (17) that is compatible with the bolt holes (44).

5. A tunnel ventilation duct support mechanism according to claim 1, characterized in that: A top ball (131) is provided on the upper part of the protrusion one (13) on one side of the semicircular plate two (12), and a groove (141) is provided at the bottom of the protrusion two (14) on one side of the semicircular plate one (11). An elastic pad (142) is provided on the top side inside the groove (141), and a pressure sensor (143) is provided at the lower part of the elastic pad (142).

6. A tunnel ventilation duct support mechanism according to claim 5, characterized in that: The pressure sensor (143) is electrically connected to the microcontroller (144), and the microcontroller (144) is connected to the back-end terminal through a communication module.

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