Radar support for detecting tunnel wall cavity

Abstract

The invention discloses a radar support for detecting tunnel wall cavities, and relates to the technical field of tunnel detection, the radar support comprises a mounting chassis and an outer end box, the top of the outer end box is provided with an opening, and the outer end box is fixedly connected with the mounting chassis; the lifting block is in sliding fit with the outer end box in the vertical direction, and a lifting assembly is arranged between the bottom of the lifting block and the outer end box; the extension column is arranged at the top of the lifting block, and a limiting mounting groove in sliding fit with the extension column is formed in the position, close to the top, of the lifting block; according to the invention, the extension column can lift and slide in the limiting mounting groove to ensure that the subsequent radar can be tightly attached to the tunnel wall, so that the detection operation can be smoothly carried out; the sleeve can be lifted on the basis of the extension column, and a buffer spring II is arranged in a matched manner, so that the subsequent lifting of the radar can be automatically compensated when the vehicle is detected to run on an uneven road surface, and the radar can still be effectively attached to the tunnel wall.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel detection, and more particularly to a radar support for detecting voids in a tunnel wall. Background Art

[0002] Currently, tunnels are detected by workers standing on a lift truck and pressing a radar against the tunnel wall by hand. This method increases the safety risk of the workers and also increases their labor intensity. To solve the above problems, a radar support frame is often used to replace manual operation.

[0003] After retrieval, a Chinese patent with the publication number CN103697932B discloses a tunnel detection device, including: an antenna box for containing a radar antenna for detecting the quality of a tunnel lining; an elastic telescopic mechanism disposed below the antenna box and connected to the antenna box for keeping the radar antenna in contact with the lining surface of the tunnel during detection; a direction adjustment mechanism disposed below the elastic telescopic mechanism and connected to the elastic telescopic mechanism for rotating the radar antenna at an angle to detect different positions of the tunnel; and a support mechanism disposed below the direction adjustment mechanism for supporting the antenna box, the elastic telescopic mechanism, and the direction adjustment mechanism. This patent can keep the radar antenna in close contact with the lining surface of the tunnel during detection, thereby making the detection result stable; in addition, it can detect different positions such as the crown, the haunch, or the side wall of the tunnel, with flexible adjustment and good applicability.

[0004] However, the above invention has the following deficiencies: When inspecting a tunnel wall at a relatively high height, in order to increase the height, multiple sets of movable pull rods need to be pulled in the fixed pull rods, with many steps, and it is difficult to make the pulling distances exactly the same. As a result, the stability of the device is reduced, so there are limitations. Summary of the Invention

[0005] The purpose of the present invention is to provide a radar support for detecting voids in a tunnel wall to solve the problems raised in the above background art.

[0006] The technical solution of the present invention is: A radar support for detecting voids in a tunnel wall includes a mounting chassis and an outer end box. The top of the outer end box is provided with an opening, and the outer end box is fixedly connected to the mounting chassis. It further includes;

[0007] A lifting block, which is slidably engaged with the outer end box in the vertical direction. An elevating assembly is provided between the bottom of the lifting block and the outer end box. A dust blowing assembly is provided on one side of the lifting block. The dust blowing assembly includes an air pump fixedly connected to the lifting block. The air outlet of the air pump is fixedly connected to an air inlet pipe, and the top end of the air inlet pipe is fixedly connected to a blowing disc communicating therewith.

[0008] An extension column is provided at the top of the lifting block. A limit installation groove that slidably cooperates with the extension column is provided at a position near the top of the lifting block. A buffer spring I is fixedly connected between the bottom end of the extension column and the limit installation groove.

[0009] A sleeve is slidably sleeved on the extension column. A plurality of strip-shaped limit grooves are provided on the circumferential inner wall of the sleeve, and a plurality of limit ribs that slidably cooperate with the strip-shaped limit grooves are fixedly provided on the circumferential outer wall of the extension column. A buffer spring II is fixedly connected between the sleeve and the lifting block, and the buffer spring II is sleeved on the outside of the extension column.

[0010] A resin tray is provided above the sleeve. A radar is fixedly installed on the top of the resin tray. A ball head sleeve is fixedly installed at the center position of the bottom of the resin tray, and a ball head block is fixedly installed at the top end of the sleeve. The ball head sleeve is in rolling connection with the ball head block. A plurality of support springs are fixedly connected between the bottom of the resin tray and the circumferential outer wall of the sleeve.

[0011] Preferably, a plurality of brackets evenly distributed at equal intervals are fixedly installed on the edge of the outer wall of the top of the resin tray, and rolling balls are rotatably connected in each bracket. A plurality of rubber rods are fixedly connected between the resin tray and the sleeve, and the rubber rods are located at the axial center position of the support springs.

[0012] Preferably, cross-shaped upper struts are rotatably connected to both sides of the circumferential outer wall of the sleeve through movable shafts, and cross-shaped lower struts are rotatably connected to both sides near the top end of the lifting block through movable shafts. The cross-shaped upper struts and the cross-shaped lower struts are rotatably connected through movable shafts.

[0013] Preferably, an installation through groove is provided on each cross-shaped lower strut, and a horizontal shaft is fixedly installed at the middle position of each installation through groove. A sleeve rod is movably sleeved on each horizontal shaft, and a guide rod is fixedly connected to the bottom of each sleeve rod. Guide cylinders are provided on both sides of the outer end box, and the guide cylinders are in sliding cooperation with the guide rods.

[0014] Preferably, a plurality of horizontally arranged branch pipes are fixedly connected to one side of each guide cylinder close to the outer end box. A plurality of guide support rods that are in sliding cooperation with the branch pipes are fixedly connected to both sides of the outer end box, and a connecting spring is fixedly connected between the branch pipes and the outer end box. Each connecting spring is sleeved on the outside of the guide support rods.

[0015] Preferably, the lifting assembly includes a bearing seat fixedly installed inside the outer end box, and a bidirectional lead screw is rotatably installed in the bearing seat. A worm gear disc is fixedly installed at a position near the bottom of the bidirectional lead screw, and a rotary motor is fixedly installed on one inner wall of the outer end box. The output shaft of the rotary motor is fixedly connected to a worm through a coupling, and the worm is meshed with the worm gear disc. The lead angles of the worm and the worm gear disc are smaller than the friction angle.

[0016] Preferably, the top end of the bidirectional lead screw is connected to the lifting block through a thread. An annular sunken cavity is formed at the bottom end of the lifting block. One end of the bidirectional lead screw close to the bottom is connected with a counterweight square block through a thread, and a counterweight end ring that is slidably matched with the annular sunken cavity is fixedly connected to the top of the counterweight square block.

[0017] Preferably, a locking mechanism is arranged between the outer end box and the lifting block. The locking mechanism includes a plurality of locking holes formed on one side of the lifting block. A plurality of through holes are formed on one side of the outer end box. A locking plate is jointly arranged on the outer sides of the plurality of through holes. A plurality of locking pins that are matched with the locking holes are fixedly connected to the inner side wall of the locking plate. A plurality of tension springs are fixedly connected between the locking plate and the outer end box. A handle is fixedly connected to the outer side wall of the locking plate.

[0018] Preferably, a plurality of internal threaded pipes are fixedly connected to the outer wall of the top of the installation chassis near the edge position, and a stiffening rib is fixedly connected between one end of the outer end box close to the bottom and the installation chassis.

[0019] Preferably, a switch is fixedly installed on one side of the outer end box. One end of the switch is connected with an external vehicle-mounted power supply, and the other end of the switch is electrically connected to the rotating motor.

[0020] The present invention provides a radar bracket for detecting voids in a tunnel wall through improvement. Compared with the prior art, it has the following improvements and advantages:

[0021] First: The extension column of the present invention can lift and slide in the limit installation groove to ensure that the subsequent radar can closely adhere to the tunnel wall, thereby ensuring the smooth progress of the detection operation; the sleeve can be lifted based on the extension column. With the buffer spring II arranged, when the detection vehicle is driving on an uneven road surface, the buffer spring II and the buffer spring I cooperate to automatically compensate for the lifting of the subsequent radar, so that the radar can still effectively adhere to the tunnel wall;

[0022] Second: The setting of the ball head sleeve and the ball head block in the present invention can make the resin tray and the radar have good flexibility, thereby avoiding interference with the following vehicle movement of the resin tray due to the unevenness of the tunnel top; with the plurality of support springs arranged, a good reset effect can be given to the resin tray; with the rolling balls arranged, they can roll with the tunnel wall, effectively avoiding large friction between the resin tray and the tunnel wall, ensuring the smooth progress of the detection operation; with the plurality of rubber rods arranged, the support effect on the resin tray can be improved. At the same time, the rubber rods can also bend and deform, meeting the flexible measurement requirements of the radar for detecting the tunnel wall;

[0023] Thirdly: The present invention utilizes the provided lifting assembly to drive the lifting block to move up and down, thereby adjusting the height of the lifting block, so that the support frame is applicable to tunnels of different heights, increasing the applicable range of the support frame.

[0024] Fourthly: The present invention utilizes the provided dust blowing assembly to blow and clean the top of the tunnel, and uses high-pressure air flow to clean the attachments on the tunnel wall, thereby reducing the bump and vibration when the resin tray moves.

[0025] Fifthly: By controlling the start of the rotating motor, the present invention drives the worm to rotate, and through the transmission of the worm wheel disc, drives the bidirectional lead screw to rotate. The rotation of the bidirectional lead screw cooperates with the limiting effect of the outer end box, enabling the lifting block to move upward and making the radar fit against the tunnel wall, so as to adjust the height of the support frame. In this process, the rotation of the bidirectional lead screw drives the counterweight block and the counterweight end ring to move downward, so as to avoid the situation that the center of gravity of the support frame shifts upward due to the upward movement of the lifting block. After the height of the support frame is adjusted, the overall structure still has a relatively low center of gravity, thus ensuring the structural stability of the support frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a three-dimensional structure diagram of the overall first perspective of the present invention;

[0028] Figure 2 It is a side view structure diagram of the present invention;

[0029] Figure 3 It is a three-dimensional structure diagram of a partial second perspective of the present invention;

[0030] Figure 4 It is a partial sectional view structure diagram of the outer end box of the present invention;

[0031] Figure 5 For the present invention Figure 4 The enlarged structure diagram at A;

[0032] Figure 6 It is a semi-sectional view structure diagram of the lifting block of the present invention;

[0033] Figure 7 It is a sectional view structure diagram of the lifting block and the counterweight cylinder of the present invention;

[0034] Figure 8 For the present invention Figure 7 The enlarged structural schematic diagram at position B in

[0035] Reference numerals:

[0036] 1. Installation chassis; 101. Inner threaded pipe; 2. Outer end box; 201. Guide cylinder; 202. Branch pipe; 3. Lifting block; 301. Guide support rod; 302. Connecting spring; 303. Locking hole; 4. Extension column; 401. Limiting rib; 5. Sleeve; 501. Strip-shaped limiting groove; 6. Resin tray; 61. Rolling ball; 7. Radar; 8. Support spring; 9. Rubber rod; 10. Cross upper strut; 11. Cross lower strut; 12. Sleeve rod; 121. Guide rod; 13. Locking plate; 14. Locking pin; 15. Tension spring; 16. Switch; 17. Stiffening rib; 18. Rotating motor; 181. Worm; 19. Bearing seat; 191. Worm gear disk; 20. Bi-directional lead screw; 21. Counterweight block; 22. Counterweight end ring; 23. Annular sunken cavity; 24. Limiting installation groove; 25. Buffer spring one; 26. Buffer spring two; 27. Ball head block; 28. Ball head sleeve; 29. Air pump; 30. Air inlet pipe; 31. Blowing disk. Detailed implementation manners

[0037] The present invention will be described in detail below. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0038] The present invention provides a radar bracket for detecting voids in a tunnel wall through improvement. The technical solution of the present invention is as follows:

[0039] As Figures 1 to 8 shown, the embodiment of the present invention provides a radar bracket for detecting voids in a tunnel wall, including an installation chassis 1 and an outer end box 2. The top of the outer end box 2 is provided with an open mouth, and the outer end box 2 is fixedly connected to the installation chassis 1. It further includes;

[0040] Lifting block 3, the lifting block 3 is slidably engaged with the outer end box 2 in the vertical direction. There is a lifting assembly provided between the bottom of the lifting block 3 and the outer end box 2. A dust blowing assembly is provided on one side of the lifting block 3. The dust blowing assembly includes an air pump 29 fixedly connected to the lifting block 3. The air outlet of the air pump 29 is fixedly connected to an air inlet pipe 30. The top end of the air inlet pipe 30 is fixedly connected to a blowing disc 31 communicated therewith. The dust blowing assembly is used to blow and clean the top of the tunnel, and the attachments on the tunnel wall are cleaned by high-pressure air flow, so as to reduce the bumps and vibrations when the resin tray 6 moves; the provided lifting assembly is used to drive the lifting block 3 to move up and down, so as to adjust the height of the lifting block 3, so that the support frame is applicable to tunnels of different heights and increases the applicable range of the support frame.

[0041] Extension column 4, the extension column 4 is arranged on the top of the lifting block 3, and a limit installation groove 24 slidably engaged with the extension column 4 is opened at a position near the top of the lifting block 3. A first buffer spring 25 is fixedly connected between the bottom end of the extension column 4 and the limit installation groove 24; through the above structure, the extension column 4 can lift and slide in the limit installation groove 24 to ensure that the subsequent radar 7 can closely adhere to the tunnel wall, so as to ensure the smooth progress of the detection operation.

[0042] Sleeve 5, the sleeve 5 is slidably sleeved on the extension column 4. A plurality of strip-shaped limit grooves 501 are opened on the inner circumferential wall of the sleeve 5, and a plurality of limit ribs 401 slidably engaged with the strip-shaped limit grooves 501 are fixedly arranged on the outer circumferential wall of the extension column 4. The strip-shaped limit grooves 501 and the limit ribs 401 cooperate with each other to play a good supporting and guiding role in the movement of the extension column 4, so as to be beneficial to improving the stability of the extension column 4 when moving. A second buffer spring 26 is fixedly connected between the sleeve 5 and the lifting block 3, and the second buffer spring 26 is sleeved on the outside of the extension column 4; through the above structure, the sleeve 5 can perform lifting treatment based on the extension column 4. With the cooperation of the provided second buffer spring 26, when the detection vehicle travels on an uneven road surface, the second buffer spring 26 and the first buffer spring 25 cooperate to automatically compensate for the lifting of the subsequent radar 7, so that the radar 7 can still effectively adhere to the tunnel wall.

[0043] Resin tray 6, the resin tray 6 is arranged above the sleeve 5, and a radar 7 is fixedly installed on the top of the resin tray 6. A ball head sleeve 28 is fixedly installed at the center position of the bottom of the resin tray 6, and a ball head block 27 is fixedly installed at the top end of the sleeve 5. The ball head sleeve 28 is rotatably connected with the ball head block 27. A plurality of support springs 8 are fixedly connected between the bottom of the resin tray 6 and the outer circumferential wall of the sleeve 5; through the above structure, the setting of the ball head sleeve 28 and the ball head block 27 can make the resin tray 6 and the radar 7 have good flexibility, so as to avoid interference with the following vehicle movement of the resin tray 6 due to the unevenness of the tunnel top; the use of the plurality of support springs 8 can give the resin tray 6 a good reset effect.

[0044] As a further solution of the present invention, a plurality of brackets are fixedly installed at the edge of the outer wall of the top of the resin tray 6 and are equally spaced, and rolling balls 61 are rotatably connected in each bracket. A plurality of rubber rods 9 are fixedly connected between the resin tray 6 and the sleeve 5, and the rubber rods 9 are located at the axial center position of the support spring 8. With the above structure, by using the provided rolling balls 61, rolling with the tunnel wall can be achieved, effectively avoiding large friction between the resin tray 6 and the tunnel wall and ensuring the smooth progress of the detection operation. By using the provided plurality of rubber rods 9, the support effect on the resin tray 6 can be improved. At the same time, the rubber rods 9 can also bend and deform, meeting the flexible measurement requirements for the detection of the tunnel wall by the radar 7.

[0045] Furthermore, both sides of the circumferential outer wall of the sleeve 5 are rotatably connected to cross upper struts 10 through movable shafts, and both sides near the top of the lifting block 3 are rotatably connected to cross lower struts 11 through movable shafts. The cross upper struts 10 and the cross lower struts 11 are rotatably connected to each other through movable shafts. With the above structure, the cross upper struts 10 and the cross lower struts 11 cooperate with each other, which can play a good role in lateral support and limit for the sleeve 5, thereby further ensuring the stability of the sleeve 5 during vertical movement.

[0046] As a further solution of the present invention, an installation through groove is formed in each cross lower strut 11, a horizontal shaft is fixedly installed at the middle position of each installation through groove, a sleeve rod 12 is movably sleeved on each horizontal shaft, and a guide rod 121 is fixedly connected to the bottom of each sleeve rod 12. Guide cylinders 201 are arranged on both sides of the outer end box 2, and the guide cylinders 201 are in sliding fit with the guide rods 121.

[0047] Furthermore, a plurality of horizontally arranged branch pipes 202 are fixedly connected to one side of each guide cylinder 201 close to the outer end box 2. A plurality of guide support rods 301 that are in sliding fit with the branch pipes 202 are fixedly connected to both sides of the outer end box 2, and a connecting spring 302 is fixedly connected between the branch pipes 202 and the outer end box 2. Each connecting spring 302 is sleeved on the outside of the guide support rod 301. With the above structure, when the cross upper struts 10 and the cross lower struts 11 are folded due to the vertical movement of the sleeve 5, the cross lower struts 11 move along an arc trajectory, and the guide rods 121 are driven by the sleeve rods 12 to generate vertical movement along the guide cylinders 201. At the same time, the guide rods 121 can also push the guide cylinders 201 to move horizontally along the branch pipes 202 and the guide support rods 301. Through the above settings, a good support and limit effect can be achieved on the movement of the cross lower struts 11, thereby ensuring the support effect of the cross lower struts 11 and the cross upper struts 10 on the sleeve 5 and being beneficial to further ensuring the stability of the support frame during use.

[0048] As a further solution of the present invention, the lifting assembly includes a bearing seat 19 fixedly installed inside the outer end box 2, and a bidirectional lead screw 20 is rotatably installed in the bearing seat 19. A worm wheel disc 191 is fixedly installed at a position near the bottom of the bidirectional lead screw 20, and a rotary motor 18 is fixedly installed on one inner wall of the outer end box 2. The output shaft of the rotary motor 18 is fixedly connected to a worm 181 through a coupling, and the worm 181 meshes with the worm wheel disc 191. The lead angles of the worm 181 and the worm wheel disc 191 are less than the friction angle. Through the above structure, the transmission between the worm 181 and the worm wheel disc 191 has good self-locking property, thus ensuring the stability of the lifting assembly in adjusting the height.

[0049] Further, the top end of the bidirectional lead screw 20 is connected to the lifting block 3 through threads. An annular sunk cavity 23 is opened at the bottom end of the lifting block 3. One end near the bottom of the bidirectional lead screw 20 is connected with a counterweight square block 21 through threads, and a counterweight end ring 22 slidably matched with the annular sunk cavity 23 is fixedly connected to the top of the counterweight square block 21.

[0050] Through the above structure, before the support frame performs the detection operation, the rotary motor 18 can be controlled to start. It drives the worm 181 to rotate, and through the transmission of the worm wheel disc 191, it drives the bidirectional lead screw 20 to rotate. The rotation of the bidirectional lead screw 20 cooperates with the limiting function of the outer end box 2, enabling the lifting block 3 to move upward and making the radar 7 fit against the tunnel wall, so as to adjust the height of the support frame. In this process, the rotation of the bidirectional lead screw 20 drives the counterweight square block 21 and the counterweight end ring 22 to move downward, thus avoiding the situation that the upward movement of the lifting block 3 causes the center of gravity of the support frame to shift upward. After the height of the support frame is adjusted, the overall structure still has a lower center of gravity, thereby ensuring the structural stability of the support frame.

[0051] As a further solution of the present invention, a locking mechanism is provided between the outer end box 2 and the lifting block 3. The locking mechanism includes a plurality of locking holes 303 opened on one side of the lifting block 3, and a plurality of through holes are opened on one side of the outer end box 2. A locking plate 13 is commonly arranged outside the plurality of through holes. A plurality of locking pins 14 matching the locking holes 303 are fixedly connected to the inner side wall of the locking plate 13. A plurality of tension springs 15 are fixedly connected between the locking plate 13 and the outer end box 2. A handle is fixedly connected to the outer side wall of the locking plate 13.

[0052] Through the above structure, after the lifting block 3 has adjusted its height under the action of the lifting assembly, the locking mechanism can be used to lock the position of the lifting block 3. The specific process is that the operator uses the handle to first pull the locking plate 13 away from the locking hole 303, and the lifting block 3 adjusts its height and ensures that the locking hole 303 is directly opposite to the through hole. At this time, the handle can be loosened, and under the action of the tensioning spring 15, the locking pin 14 is inserted into the corresponding locking hole 303, so that the lifting block 3 and the outer end box 2 are locked.

[0053] Furthermore, a plurality of internal threaded tubes 101 are fixedly connected to the top outer wall of the mounting chassis 1 near the edge, and a stiffening rib 17 is fixedly connected between the end of the outer end box 2 near the bottom and the mounting chassis 1; through the above structure, utilizing the set stiffening ribs 17, the firmness of the structural installation of the outer end box 2 can be effectively improved.

[0054] As a further solution of the present invention, a switch 16 is fixedly installed on one side of the outer end box 2, and one end of the switch 16 is connected to an external vehicle power supply, and the other end of the switch 16 is electrically connected to the rotating motor 18; through the above structure, the start and stop of the rotating motor 18 can be controlled by pressing the switch 16.

[0055] The specific working method is: when in use, the operator uses the handle to first pull the locking plate 13 away from the locking hole 303, and controls the rotating motor 18 to start by pressing the switch 16, and uses it to drive the worm 181 to rotate, and through the transmission action of the worm wheel 191, drives the bidirectional lead screw 20 to rotate, and the rotation of the bidirectional lead screw 20 cooperates with the limiting action of the outer end box 2 to move the lifting block 3 upward, and makes the radar 7 fit against the tunnel wall, so as to adjust the height of the support frame. In this process, the rotation of the bidirectional lead screw 20 drives the counterweight block 21 together with the counterweight end ring 22 to move downward, so as to avoid the situation where the lifting block 3 moves upward and causes the center of gravity of the support frame to shift upward, so that after the height of the support frame is raised, the overall center of gravity is still lower, and the lifting block 3 is in the lifting group After the height is adjusted under the action of the parts, the locking mechanism can be used to lock the position of the lifting block 3. The specific process is that the lifting block 3 adjusts the height and ensures that the locking hole 303 is directly opposite to the through hole. At this time, the handle can be loosened, and the locking pin 14 is inserted into the corresponding locking hole 303 under the action of the tension spring 15, so that the lifting block 3 and the outer end box 2 are locked; the lifting component is used to make the support frame suitable for tunnels of different heights, increasing the application range of the support frame, and the air pump 29 blows the high-pressure airflow into the air inlet pipe 30, and the high-pressure airflow enters the blowing plate 31 through the air inlet pipe 30. The blowing plate 31 blows dust off the top of the tunnel, and uses the high-pressure airflow to clean the attachments on the tunnel wall, thereby reducing the bumps and vibrations of the resin tray 6 when it moves;

[0056] The extension column 4 slides up and down within the limit installation groove 24 to ensure that the subsequent radar 7 closely adheres to the tunnel wall, thereby ensuring the smooth progress of the detection operation. At the same time, the sleeve 5 is lifted and lowered based on the extension column 4. In cooperation with the second buffer spring 26, when the detection vehicle travels on an uneven road surface, the second buffer spring 26 and the first buffer spring 25 cooperate to automatically compensate for the lifting of the subsequent radar 7, so that the radar 7 still effectively adheres to the tunnel wall. Finally, the setting of the ball head sleeve 28 and the ball head block 27 enables the resin tray 6 and the radar 7 to have good flexibility, thereby avoiding interference with the following movement of the resin tray 6 due to the unevenness of the tunnel top. The multiple support springs 8 provided give the resin tray 6 a good reset effect. When the folding of the cross upper strut 10 and the cross lower strut 11 is caused by the vertical movement of the sleeve 5, the cross lower strut 11 moves along an arc trajectory and drives the guide rod 121 to move vertically along the guide cylinder 201 through the sleeve rod 12. At the same time, the guide rod 121 also pushes the guide cylinder 201 to move horizontally along the branch pipe 202 and the guide support rod 301. Through the above settings, a good supporting and limiting effect on the movement of the cross lower strut 11 is achieved, thereby ensuring the supporting effect of the cross lower strut 11 and the cross upper strut 10 on the sleeve 5, which is beneficial to further ensuring the stability of the support frame during use.

[0057] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A radar bracket for detecting tunnel wall cavities, comprising a mounting chassis (1) and an outer end box (2), wherein the top of the outer end box (2) is provided with an opening, and the outer end box (2) is fixedly connected to the mounting chassis (1), characterized in that: Also includes; A lifting block (3), wherein the lifting block (3) and the outer end box (2) are slidably matched in the vertical direction, a lifting assembly is arranged between the bottom of the lifting block (3) and the outer end box (2), a dust blowing assembly is arranged on one side of the lifting block (3), and the dust blowing assembly comprises an air pump (29) fixedly connected to the lifting block (3), an air outlet of the air pump (29) is fixedly connected to an air inlet pipe (30), and a top end of the air inlet pipe (30) is fixedly connected to an air blowing plate (31) in communication therewith; An extension column (4), the extension column (4) being arranged on the top of the lifting block (3), and a limit installation groove (24) which is slidably matched with the extension column (4) is provided at a position close to the top of the lifting block (3), and a buffer spring (25) is fixedly connected between the bottom end of the extension column (4) and the limit installation groove (24); A sleeve (5), the sleeve (5) is slidably mounted on the extension column (4), a plurality of strip-shaped limiting grooves (501) are provided on the circumferential inner wall of the sleeve (5), and a plurality of limiting convex ribs (401) that are slidably matched with the strip-shaped limiting grooves (501) are fixedly arranged on the circumferential outer wall of the extension column (4), a second buffer spring (26) is fixedly connected between the sleeve (5) and the lifting block (3), and the second buffer spring (26) is mounted on the outer side of the extension column (4); A resin tray (6), wherein the resin tray (6) is arranged above the sleeve (5), and a radar (7) is fixedly installed on the top of the resin tray (6), a ball head sleeve (28) is fixedly installed at the center position of the bottom circle of the resin tray (6), and a ball head block (27) is fixedly installed on the top of the sleeve (5), the ball head sleeve (28) is rollingly connected to the ball head block (27), and a plurality of support springs (8) are fixedly connected between the bottom of the resin tray (6) and the circumferential outer wall of the sleeve (5).

2. A radar bracket for detecting tunnel wall cavities according to claim 1, characterized in that: A plurality of brackets distributed at equal distances are fixedly mounted on the edge of the top outer wall of the resin tray (6), and rolling balls (61) are rollingly connected in the brackets. A plurality of rubber rods (9) are fixedly connected between the resin tray (6) and the sleeve (5), and the rubber rods (9) are located at the axial center position of the support spring (8).

3. The radar bracket for detecting tunnel wall cavities according to claim 1, characterized in that: Both sides of the circumferential outer wall of the sleeve (5) are rotatably connected to cross upper support rods (10) via a movable shaft, and both sides of the lifting block (3) near the top are rotatably connected to cross lower support rods (11) via a movable shaft, and the cross upper support rods (10) and the cross lower support rods (11) are rotatably connected via a movable shaft.

4. A radar bracket for detecting tunnel wall cavities according to claim 3, characterized in that: Each of the cross lower support rods (11) is provided with a mounting groove, and a horizontal axis is fixedly installed in the middle position of each mounting groove, and a shaft sleeve rod (12) is movably sleeved on each of the horizontal axes, and a guide rod (121) is fixedly connected to the bottom of each shaft sleeve rod (12), and guide cylinders (201) are provided on both sides of the outer end box (2), and the guide cylinders (201) are slidably matched with the guide rods (121).

5. A radar bracket for detecting tunnel wall cavities according to claim 4, characterized in that: A plurality of horizontally arranged branch pipes (202) are fixedly connected to one side of each guide cylinder (201) close to the outer end box (2), a plurality of guide support rods (301) slidingly matched with the branch pipes (202) are fixedly connected to both sides of the outer end box (2), and a connecting spring (302) is fixedly connected between the branch pipe (202) and the outer end box (2), and each connecting spring (302) is sleeved on the outside of the guide support rod (301).

6. The radar bracket for detecting tunnel wall cavities according to claim 1, characterized in that: The lifting assembly comprises a bearing seat (19) fixedly mounted inside the outer end box (2), and a bidirectional screw (20) is rotatably mounted inside the bearing seat (19), a worm wheel (191) is fixedly mounted near the bottom of the bidirectional screw (20), and a rotating motor (18) is fixedly mounted on an inner wall of one side of the outer end box (2), the output shaft of the rotating motor (18) is fixedly connected to a worm (181) via a coupling, and the worm (181) is meshed with the worm wheel (191), and the lift angle of the worm (181) and the worm wheel (191) is smaller than the friction angle.

7. A radar bracket for detecting tunnel wall cavities according to claim 6, characterized in that: The top end of the bidirectional screw rod (20) is connected to the lifting block (3) via a thread, and the bottom end of the lifting block (3) is provided with an annular sinking cavity (23). The end of the bidirectional screw rod (20) close to the bottom is connected to a counterweight block (21) via a thread, and the top of the counterweight block (21) is fixedly connected to a counterweight end ring (22) that slidably cooperates with the annular sinking cavity (23).

8. The radar bracket for detecting tunnel wall cavities according to claim 1, characterized in that: A locking mechanism is provided between the outer end box (2) and the lifting block (3), and the locking mechanism comprises a plurality of locking holes (303) opened on one side of the lifting block (3), and a plurality of through holes are opened on one side of the outer end box (2), a locking plate (13) is provided on the outer sides of the plurality of through holes, and a plurality of locking pins (14) matching the locking holes (303) are fixedly connected to the inner side wall of the locking plate (13), a plurality of tensioning springs (15) are fixedly connected between the locking plate (13) and the outer end box (2), and a handle is fixedly connected to the outer side wall of the locking plate (13).

9. The radar bracket for detecting tunnel wall cavities according to claim 1, characterized in that: A plurality of internally threaded tubes (101) are fixedly connected to the top outer wall of the mounting chassis (1) near the edge, and a stiffening rib (17) is fixedly connected between one end of the outer end box (2) near the bottom and the mounting chassis (1).

10. The radar bracket for detecting tunnel wall cavities according to claim 1, characterized in that: A switch (16) is fixedly mounted on one side of the outer end box (2), one end of the switch (16) is connected to an external vehicle power supply, and the other end of the switch (16) is electrically connected to a rotating motor (18).

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