Tunnel primary support over-break and under-break detection device

Abstract

The utility model relates to a tunnel primary support over-break and under-break detection device. The tunnel primary support back break detection device is mainly designed for solving the problem that an existing tunnel primary support back break detection device cannot achieve automatic reciprocating motion of a detection piece. The lower end of the U-shaped plate is fixed at the left end and the right end of a mounting plate; the supporting plate and the fixing plate are both fixed to the mounting plate, the motor is fixed to the fixing plate, the reciprocating lead screw is connected to the fixing plate and connected with an output shaft of the motor, and the sliding block is in threaded connection to the reciprocating lead screw. The gear is fixed to the rotating rod, the rotating rod is connected to the supporting plate, the gear is meshed with the rack at the top of the sliding block, and the disc is fixed to the rotating rod; a shaft is arranged in an arc-shaped hole of the U-shaped plate, an annular plate is arranged on the shaft, an upper connecting rod is arranged on the annular plate, a connecting seat is fixed at the top of the upper connecting rod, and a sliding detector is arranged on the connecting seat. The lower end of the annular plate is provided with a lower connecting rod, and the lower end of the lower connecting rod is fixed on the disc. The device has the advantage that the sliding detector can automatically reciprocate.

Description

Technical Field

[0001] The utility model relates to the field of tunnel construction, in particular to a tunnel initial support over-excavation and under-excavation detection device. Background Art

[0002] During the initial support process of tunnel construction, over-excavation and under-excavation are inevitable. In particular, under-excavation is the red line in tunnel construction. If it is not detected during the steel bar binding and subsequent secondary lining concrete pouring process, the quality consequences will be very serious. Rework will be required later, wasting a lot of manpower and material resources and delaying the construction period.

[0003] The patent with publication number CN217760984U records a tunnel initial branch over-excavation or under-excavation detection device, which includes a trolley and a detection member, which can be installed on a rail car to move back and forth along the arc surface of the initial branch of the tunnel to be detected, so as to detect the initial branch over-excavation or under-excavation of the tunnel by moving the detection member close to the arc surface of the initial branch of the tunnel to be detected. However, it has the following shortcomings: the detection member is driven to move back and forth by a drive motor, a sprocket and a chain, which causes the problem that after the detection member moves to one end of the rail car, the staff needs to adjust the rotation direction of the output end of the drive motor, the operation process is relatively cumbersome, and the automatic reciprocating movement of the detection member cannot be achieved. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a tunnel initial support over-excavation and under-excavation detection device which does not need to adjust the rotation direction of the motor output end and effectively simplifies the operation process.

[0005] The purpose of the utility model is achieved as follows: it includes a U-shaped plate, the open end of the U-shaped plate is arranged downward, the two lower end surfaces of the open end of the U-shaped plate are respectively fixed to the left and right ends of the mounting plate, and the U-shaped plate is provided with an arc hole;

[0006] The support plate is fixed to the middle of the upper surface of the mounting plate, and the mounting plates on the left and right sides in front of the support plate are respectively fixed with fixing plates, the motor is fixed to one of the fixing plates, the reciprocating screw rod is rotatably connected to the two fixing plates and one end of the reciprocating screw rod is connected to the output shaft of the motor, the slider is threadedly connected to the reciprocating screw rod, and a rack is fixed to the top of the slider;

[0007] The gear is fixed on the rotating rod, the rotating rod is rotatably connected to the support plate, the gear is meshed with the rack, and the disc is fixed on the rotating rod in front of the gear;

[0008] A shaft is slidably arranged in the arc hole of the U-shaped plate, a ring plate is fixed to the front end of the shaft, an upper connecting rod extending upward is fixed to the upper end of the ring plate, a connecting seat is fixed to the top of the upper connecting rod, and a sliding detector is installed on the connecting seat.

[0009] A lower connecting rod is fixed to the lower end of the annular plate, and the lower end of the lower connecting rod is fixed on the disc.

[0010] It also includes a base, which is located below the mounting plate. A plurality of connection grooves with openings facing upward are provided on the top of the base. Connection blocks are fixed on the lower surface of the mounting plate at positions corresponding to the connection grooves. The connection blocks on the mounting plate extend into the corresponding connection grooves of the base. The connection blocks and the connection grooves are connected by pins.

[0011] A first limit plate extending upward is fixed in the middle of the base, and a second limit plate extending downward is correspondingly fixed to the lower surface of the mounting plate. Both the first limit plate and the second limit plate are provided with threaded holes, and bolts are arranged in the two threaded holes, that is, the first limit plate and the second limit plate are connected by bolts.

[0012] The advantages of the utility model are: through the reciprocating screw rod, the reciprocating screw rod can be driven to rotate during the working process of the motor, and the reciprocating screw rod can make the slider move back and forth left and right when rotating, so that the rack drives the gear to rotate back and forth, thereby driving the sliding detector to reciprocate through the disc and the lower connecting rod; there is no need to adjust the rotation direction of the motor output end, which effectively simplifies the complexity of the operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0015] Figure 3 yes Figure 2 Side view of

[0016] Figure 4 yes Figure 1 Schematic diagram of the enlarged structure at point B in the middle. DETAILED DESCRIPTION

[0017] Combine the following Figure 1-4 Further explain the utility model;

[0018] It comprises a U-shaped plate 1, the opening end of the U-shaped plate is arranged downward, the two lower end surfaces of the opening end of the U-shaped plate are respectively fixed to the left and right ends of the mounting plate 2, and the U-shaped plate is provided with an arc hole 3;

[0019] The support plate 4 is fixed to the middle of the upper surface of the mounting plate, and the mounting plates on the left and right sides in front of the support plate are respectively fixed with fixing plates 5, the motor 6 is fixed to one of the fixing plates, the reciprocating screw rod 7 is rotatably connected to the two fixing plates and one end of which is connected to the motor output shaft, the slider 8 is threadedly connected to the reciprocating screw rod, and a rack 9 is fixed to the top of the slider;

[0020] The gear 10 is fixed on the rotating rod 11, which is rotatably connected to the support plate, the gear is meshed with the rack, and the disc 12 is fixed on the rotating rod in front of the gear;

[0021] A shaft 13 is slidably arranged in the arc hole of the U-shaped plate, a ring plate 14 is fixed to the front end of the shaft, an upper connecting rod 15 extending upward is fixed to the upper end of the ring plate, a connecting seat 16 is fixed to the top of the upper connecting rod, and a sliding detector 17 is installed on the connecting seat. The sliding detector is a commercially available product.

[0022] A lower connecting rod 18 is fixed to the lower end of the annular plate, and the lower end of the lower connecting rod is fixed on the disc.

[0023] The motor drives the reciprocating screw to rotate, which in turn drives the gear to rotate through the rack, and then drives the annular plate to move on the U-shaped plate through the disc and the lower connecting rod, so that the sliding detector moves for detection.

[0024] In order to fold the U-shaped plate when not in use to reduce the space occupied by the entire device, a base 19 is also included. The base is located below the mounting plate. A plurality of connection grooves 20 with openings facing upward are provided on the top of the base. A connection block 21 is fixed to the lower surface of the mounting plate at a position corresponding to each connection groove. The connection block on the mounting plate extends into the corresponding connection groove of the base. The connection block and the connection groove are connected by a pin. The U-shaped plate can be turned over when not in use, so that the U-shaped plate can be folded.

[0025] In order to ensure the stability of the mounting plate and the U-shaped plate during use, a first limit plate 22 extending upward is fixed in the middle of the base, and a second limit plate 23 extending downward is correspondingly fixed to the lower surface of the mounting plate. Both the first limit plate and the second limit plate are provided with threaded holes, and bolts are provided in the two threaded holes, that is, the first limit plate and the second limit plate are connected by bolts. In this way, the mounting plate can be fixedly supported, ensuring the normal use of the entire device.

[0026] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tunnel initial support over-excavation and under-excavation detection device, comprising a U-shaped plate (1), the opening end of the U-shaped plate being arranged downward, the two lower end surfaces of the opening end of the U-shaped plate being respectively fixed to the left and right ends of a mounting plate (2), and an arc-shaped hole (3) being opened on the U-shaped plate; wherein: The support plate (4) is fixed to the middle of the upper surface of the mounting plate, the mounting plates on the left and right sides in front of the support plate are respectively fixed with fixing plates (5), the motor (6) is fixed to one of the fixing plates, the reciprocating screw (7) is rotatably connected to the two fixing plates and one end of the reciprocating screw is connected to the output shaft of the motor, the slider (8) is threadedly connected to the reciprocating screw, and a rack (9) is fixed to the top of the slider; The gear (10) is fixed on the rotating rod (11), the rotating rod is rotatably connected to the support plate, the gear is meshed with the rack, and the disc (12) is fixed on the rotating rod in front of the gear; A shaft (13) is slidably disposed in the arc-shaped hole of the U-shaped plate, a ring plate (14) is fixed to the front end of the shaft, an upper connecting rod (15) extending upward is fixed to the upper end of the ring plate, a connecting seat (16) is fixed to the top of the upper connecting rod, and a sliding detector (17) is mounted on the connecting seat; A lower connecting rod (18) is fixed to the lower end of the annular plate, and the lower end of the lower connecting rod is fixed to the disc.

2. The tunnel initial branch over-excavation and under-excavation detection device according to claim 1 is characterized in that: It also includes a base (19), the base is located below the mounting plate, a plurality of connection grooves (20) with openings facing upward are provided on the top of the base, a connection block (21) is fixed on the lower surface of the mounting plate at a position corresponding to each connection groove, the connection block on the mounting plate extends into the corresponding connection groove of the base, and the connection block and the connection groove are connected by a pin shaft; A first limit plate (22) extending upward is fixed in the middle of the base, and a second limit plate (23) extending downward is correspondingly fixed to the lower surface of the mounting plate. The first limit plate and the second limit plate are both provided with threaded holes, and bolts are provided in the two threaded holes, that is, the first limit plate and the second limit plate are connected by bolts.

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