A bridge crack measuring device for bridge engineering that is easy to adjust

Abstract

The present invention discloses a bridge crack measuring device for bridge engineering that is easy to adjust, comprising: a fixed frame, a vacuum pump is installed on the side wall of the fixed frame, the output end of the vacuum pump is connected to two suction cups through a pipeline, the suction cup is fixed to the side wall of the fixed frame, the interior of the fixed frame is rotatably connected to a movable plate through a damping shaft, the interior of the movable plate is rotatably connected to a second screw rod, the outer wall of the second screw rod is threadedly connected to an adjustment plate, the adjustment plate is slidably connected to the interior of the movable plate through a slider, the inner side of the adjustment plate is connected to a connecting plate through a damping shaft, and the side wall of the connecting plate is fixedly connected to a fixed frame. The present invention sets a crack inner distance detection member, so that the infrared ranging receiver and the infrared ranging transmitter on one side of the two moving blocks automatically detect and record the width change of the crack during the movement, thereby improving the accuracy and efficiency of the measurement.

Description

Technical Field

[0001] The invention relates to the technical field of bridge crack detection, and in particular to a bridge crack measuring device which is easy to adjust and is used in bridge engineering. Background Art

[0002] Municipal engineering refers to municipal infrastructure construction projects. In my country, all kinds of public infrastructure construction supporting urban life fall into the category of municipal engineering, such as common urban roads, bridges, subways, underground pipelines and other projects. Municipal bridges are essential transportation infrastructure in cities. Bridge engineering refers to the work process of bridge survey, design, construction, maintenance and verification, as well as the science and engineering technology of studying this process. The development of bridge engineering mainly depends on the needs of transportation for it. Bridges will inevitably have cracks after long-term use, so special crack measurement devices are needed to detect them so that subsequent staff can carry out repair operations.

[0003] The existing bridge crack measuring device generally requires staff to manually place the detection head on the crack for mobile photo detection. Due to the different shapes of the cracks, the crack size inside the crack may be larger than the crack size on the surface, which makes the data detected by the equipment prone to errors. The device measurement position cannot be automatically adjusted according to the crack position, resulting in data errors when subsequent staff repair or fill the cracks, reducing the staff's work efficiency. For this reason, we provide a bridge crack measuring device for bridge engineering that is easy to adjust to solve the above problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a bridge crack measuring device for bridge engineering which is easy to adjust.

[0005] The present invention is achieved through the following technical solutions:

[0006] A bridge crack measuring device for bridge engineering that is easy to adjust, comprising: a fixed frame, a vacuum pump is installed on the side wall of the fixed frame, the output end of the vacuum pump is connected to two suction cups through a pipeline, the suction cup is fixed to the side wall of the fixed frame, the interior of the fixed frame is rotatably connected to a movable plate through a damping shaft, the interior of the movable plate is rotatably connected to a second screw rod, the outer wall of the second screw rod is threadedly connected to an adjustment plate, the adjustment plate is slidably connected to the interior of the movable plate through a slider, the inner side of the adjustment plate is connected to a connecting plate through a damping shaft, the side wall of the connecting plate is fixedly connected to a fixed frame, the inner side of the fixed frame is slidably connected to two sliding blocks, and a mobile frame is fixedly connected between the two sliding blocks; a striker, two strikers are provided, and the two strikers are arranged at the bottom of the mobile frame, and the two strikers are symmetrically arranged with the center of the mobile frame as the axis; a crack inner distance detection member, located inside the mobile frame, used to detect the bridge crack inner distance; an auxiliary cleaner, located at the top of the mobile frame, used to clean impurities generated during detection.

[0007] As a further solution of the present invention: the crack inner distance detection component includes a first screw rod rotatably connected to the inner side of the fixed frame, and one end of the first screw rod passes through the outside of the fixed frame and is fixedly connected to a ring, the outer wall of the first screw rod is threadedly connected to the movable frame, and the interior of the movable frame is slidably connected to two movable blocks, the two movable blocks are symmetrically arranged with the center of the movable frame as the axis, the bottom of the movable block is fixedly connected to the striker, a first spring is installed between one side of the movable block and the interior of the movable frame, and the interior of the striker is provided with an auxiliary detection component for assisting in detecting the crack inner distance.

[0008] As a further solution of the present invention: the auxiliary detection component includes a plurality of fixed sleeves fixedly connected to the inside of the striker, a circular sliding rod is slidably connected to the inside of the fixed sleeve, a second spring is installed between the fixed sleeve and the circular sliding rod, an infrared ranging receiver is installed inside the fixed sleeve, an infrared ranging transmitter is installed at one end of the circular sliding rod, a plurality of mutually combined bonding plates are installed at one end of the circular sliding rod, and the plurality of bonding plates are connected by a connecting assembly.

[0009] As a further solution of the present invention: the connecting assembly includes a limit seat fixedly connecting the end of the circular sliding rod and the ends of the plurality of bonding plates, the bottom of the limit seat is rotatably connected to a fixed shaft rod, one end of the fixed shaft rod passes through the outside of the limit seat and is fixedly connected to the bonding plate, a torsion spring is installed between the limit seat and the fixed shaft rod, every two bonding plates are connected through the fixed shaft rod, and a bonding plate close to the circular sliding rod is connected to it through the fixed shaft rod.

[0010] As a further solution of the present invention: the auxiliary cleaner includes an air pump installed on the top of the mobile frame, an air supply channel is opened inside the mobile frame, the air outlet of the air pump is installed at the air inlet of the air supply channel through a pipeline, a bellows is installed at the air outlet of the air supply channel, a through groove for guiding air is opened inside the mobile block, and the air supply channel is connected to the through groove through the bellows, a plurality of groups of connecting grooves are opened inside the striker, and each group of connecting grooves is provided with two, one connecting groove has an air outlet facing upward, and the other connecting groove has an air outlet facing downward.

[0011] As a further solution of the present invention: the auxiliary cleaner also includes two electric telescopic rods installed inside the mobile frame, the execution ends of the electric telescopic rods are fixedly connected to the rectangular plate, the interior of the mobile frame is provided with a slide groove matching the rectangular plate, and the rectangular plate is slidably connected to the inside of the slide groove, and the bottom of the rectangular plate is provided with a regulator for adjusting the blowing direction of the striker.

[0012] As a further solution of the present invention: the regulator includes two adjusting rods slidably connected to the bottom of the rectangular plate, and the two adjusting rods are symmetrically arranged with the center of the rectangular plate as the axis, a second rectangular groove, an air delivery groove and a first rectangular groove are opened on one side of the adjusting rod, the height of the second rectangular groove is greater than the diameter of the corrugated pipe, and the corrugated pipe passes through the inside of the second rectangular groove, the diameter of the air delivery groove matches the diameter of the connecting groove, and the height of the first rectangular groove is greater than the diameter of the fixed sleeve.

[0013] As a further solution of the present invention: the infrared ranging receiver and the infrared ranging transmitter are respectively on one side of the two moving blocks, and the infrared ranging receiver and the infrared ranging transmitter are symmetrically arranged.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. By setting the crack inner distance detection part and rotating the first screw rod, the mobile frame is driven to move inside the fixed frame, thereby driving the striker to move and detect inside the bridge crack to be detected. The two strikers can automatically move laterally under the action of the first spring according to the shape of the crack, maintain contact with the edge of the crack, ensure the continuity of the measurement, and facilitate automatic adaptive adjustment of the measurement position, so that the infrared ranging receiver and the infrared ranging transmitter on one side of the two moving blocks can automatically detect and record the width change of the crack during the movement, thereby improving the accuracy and efficiency of the measurement;

[0016] 2. By setting up auxiliary detection components, when the striker moves and detects in the crack of the bridge to be detected, it contacts with the convex or concave parts inside the crack when it moves. When the striker reaches the convex part, because the bonding plate is provided with an inclined surface, when the convex part touches the inclined surface, the bonding plate can be pushed to shrink into the fixed sleeve under the squeezing force of the inclined surface, so that the second spring is squeezed, so that the infrared ranging transmitter and infrared ranging receiver installed on the inner side of the fixed sleeve can automatically detect and record the width change of the crack during the contraction of the bonding plate. Then, the data recorded by the infrared ranging receiver and infrared ranging transmitter on one side of the two moving blocks are combined, so that the width of the inner side of the crack can be accurately measured, thereby further improving the accuracy of crack measurement;

[0017] 3. By setting the connection component, when the raised part in the crack is long, the inclined surface of one side of the frontmost bonding plate cannot be squeezed, so that the bonding plate can be rotated through the fixed shaft rod when encountering resistance during the movement, and then it can be retracted with the circular sliding rod, so as to avoid the longer convex point and the rotating bonding plate can be attached to the front end of the convex point, which reduces the measurement error and improves the measurement accuracy by avoiding the hard collision with the convex part;

[0018] 4. By setting up an auxiliary cleaner, before the striker moves, start the air pump first, the air pump inputs the outside air from the air delivery channel into the bellows, and then inputs the air into the striker through the through slot inside the moving block, and then passes through the air delivery slot, and blows the dust or debris in the bridge crack from the connecting slot to blow it off, so that the measured data can be more accurate;

[0019] 5. By setting up the coordination of parts such as the gas transmission groove, when the two strikers are inserted downward to the bottom of the bridge crack for detection, the electric telescopic rod is started to drive the rectangular plate to move in the slide groove inside the mobile frame, thereby driving the two adjusting rods at the bottom of the rectangular plate to move, and aligning the gas transmission groove with the connecting groove with the opening facing upward, so that the gas can be tilted to spray upward, which can help clean up the fine debris and dust at the edge of the crack, reduce interference during measurement, and thus improve the accuracy of measurement. When the two strikers are inserted upward to the bottom of the bridge crack for detection, the position of the gas transmission groove can be adjusted by the electric telescopic rod, so that the gas transmission groove can be aligned with the connecting groove with the opening facing downward, so that the gas can be tilted to spray into the crack. The gas is tilted to spray into the crack, which can generate a certain airflow impact force, which helps to clean up the dust, debris, accumulated water or other impurities inside the crack, which may interfere with subsequent crack detection or repair work, so its cleaning can ensure the accuracy of crack treatment and detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a structural schematic diagram of the present invention;

[0021] Figure 2 is a bottom axial view of the present invention;

[0022] Figure 3 is a side sectional view of the movable panel of the present invention;

[0023] Figure 4 is a cross-sectional view of a mobile frame of the present invention;

[0024] Figure 5 It is a partial structural diagram of the present invention;

[0025] Figure 6 For the present invention Figure 4 Enlarged view of point A in the middle;

[0026] Figure 7 is a cross-sectional view of the firing pin of the present invention;

[0027] Figure 8 A view of the adjusting rod shaft of the present invention;

[0028] Fig. 9 is a cross-sectional view of a fixed sleeve of the present invention;

[0029] Fig.10 It is a view of the circular slide bar axis of the present invention.

[0030] In the figure: 1, fixed frame; 2, vacuum pump; 3, suction cup; 4, movable plate; 5, adjustment plate; 6, connecting plate; 7, fixed frame; 8, first screw rod; 9, movable frame; 10, air pump; 11, second screw rod; 12, striker; 13, electric telescopic rod; 14, rectangular plate; 15, moving block; 16, sliding block; 17, adjustment rod; 18, gas transmission channel; 19, bellows; 20, first spring; 21, fixed sleeve; 22, second spring; 23, circular slide rod; 24, fitting plate; 25, fixed shaft rod; 26, first rectangular groove; 27, gas transmission groove; 28, connecting groove; 29, torsion spring; 30, limit seat; 31, infrared ranging transmitter; 32, infrared ranging receiver; 33, second rectangular groove. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and the best embodiment. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the invention.

[0032] In the description of the invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the invention.

[0033] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Example 1: Please refer to Figures 1 to 10 The present embodiment provides a bridge crack measuring device for bridge engineering that is easy to adjust, comprising: a fixed frame 1, a vacuum pump 2 is installed on the side wall of the fixed frame 1, the output end of the vacuum pump 2 is connected to two suction cups 3 through a pipeline, the suction cup 3 is fixed to the side wall of the fixed frame 1, the interior of the fixed frame 1 is rotatably connected to a movable plate 4 through a damping shaft, the interior of the movable plate 4 is rotatably connected to a second screw rod 11, the outer wall of the second screw rod 11 is threadedly connected to an adjusting plate 5, the adjusting plate 5 is slidably connected to the interior of the movable plate 4 through a slider, the inner side of the adjusting plate 5 is connected to a connecting plate 6 through a damping shaft, the side wall of the connecting plate 6 is fixedly connected to a fixed frame 7, the inner side of the fixed frame 7 is slidably connected to two sliding blocks 16, and a moving frame 9 is fixedly connected between the two sliding blocks 16; a striker 12, two strikers 12 are provided, and the two strikers 12 are provided at the bottom of the moving frame 9. , two strikers 12 are symmetrically arranged with the center of the mobile frame 9 as the axis, the crack inner distance detection member is located inside the mobile frame 9 and is used to detect the inner distance of the bridge crack, the crack inner distance detection member includes a first screw rod 8 rotatably connected to the inner side of the fixed frame 7, and one end of the first screw rod 8 penetrates to the outside of the fixed frame 7 and is fixedly connected with a ring, the outer wall of the first screw rod 8 is threadedly connected to the mobile frame 9, and the inside of the mobile frame 9 is slidably connected with two moving blocks 15, the two moving blocks 15 are symmetrically arranged with the center of the mobile frame 9 as the axis, the bottom of the moving block 15 is fixedly connected to the striker 12, a first spring 20 is installed between one side of the moving block 15 and the inside of the mobile frame 9, the infrared ranging receiver 32 and the infrared ranging transmitter 31 are respectively on one side of the two moving blocks 15, and the infrared ranging receiver 32 and the infrared ranging transmitter 31 are symmetrically arranged;

[0035] First, the staff places the device near the crack in the bridge, and then starts the vacuum pump 2, so that the suction cup 3 is adsorbed on the fixed point and the device is fixed on the bridge. Then the staff can twist the second screw rod 11 according to the position of the crack, thereby driving the adjustment plate 5 to slide inside the movable plate 4, so as to adjust the positions of the two strikers 12. Then, according to the angular position of the crack, the staff can rotate the movable plate 4 or the connecting plate 6 to adjust the angle of the two strikers 12, until the staff pinches the two strikers 12 by hand and moves them relative to each other at the bottom of the movable frame 9 through the moving block 15. At this time, the first spring 20 is compressed, and then the striker 12 is placed into the crack of the bridge, so that the staff can adjust the position of the crack according to the position of the crack. The position of the device is adjusted to improve the convenience of measurement. When the two strikers 12 are placed inside the crack, the two strikers 12 are respectively pressed against the edge of the crack under the action of the first spring 20. Then the staff rotates the first screw 8 to drive the mobile frame 9 to move inside the fixed frame 7, thereby driving the striker 12 to move and detect the bridge crack to be detected. The two strikers 12 can automatically move laterally under the action of the first spring 20 according to the shape of the crack, maintain contact with the edge of the crack, and ensure the continuity of the measurement, so that the infrared ranging receiver 32 and the infrared ranging transmitter 31 on one side of the two moving blocks 15 can automatically detect and record the width change of the crack during the movement, thereby improving the accuracy and efficiency of the measurement.

[0036] Embodiment 2: An auxiliary detection component for assisting in detecting the inner distance of a crack is provided inside the striker 12, and the auxiliary detection component includes a plurality of fixed sleeves 21 fixedly connected inside the striker 12, a circular slide bar 23 is slidably connected inside the fixed sleeve 21, a second spring 22 is installed between the fixed sleeve 21 and the circular slide bar 23, an infrared distance measuring receiver 32 is installed inside the fixed sleeve 21, an infrared distance measuring transmitter 31 is installed at one end of the circular slide bar 23, and a plurality of mutually combined bonding plates 24 are installed at one end of the circular slide bar 23 , multiple bonding plates 24 are connected by a connection assembly, and the connection assembly includes a limit seat 30 fixedly connected to the end of the circular slide bar 23 and the end of multiple bonding plates 24, the bottom of the limit seat 30 is rotatably connected to the fixed shaft 25, one end of the fixed shaft 25 passes through the outside of the limit seat 30 and is fixedly connected to the bonding plate 24, a torsion spring 29 is installed between the limit seat 30 and the fixed shaft 25, every two bonding plates 24 are connected through the fixed shaft 25, and a bonding plate 24 close to the circular slide bar 23 is connected to it through the fixed shaft 25;

[0037] A bevel is provided on one side of a bonding plate 24 at the front end. When the striker 12 moves and detects in the crack of the bridge to be detected, the striker 12 contacts with the raised or recessed part inside the crack when it moves. When the striker 12 reaches the raised part, because the bonding plate 24 is provided with a bevel, when the raised part touches the bevel, the bonding plate 24 can be pushed to contract inside the fixed sleeve 21 under the squeezing force of the bevel, so that the second spring 22 is squeezed, so that the bonding plate 24 automatically detects and records the change in the width of the crack during the movement of the uneven inner side of the crack through the infrared ranging transmitter 31 and the infrared ranging receiver 32 installed on the inner side of the fixed sleeve 21 during the contraction of the bonding plate 24, and then combines the data recorded by the infrared ranging receiver 32 and the infrared ranging transmitter 31 on one side of the two moving blocks 15, so that the inner width of the crack can be accurately measured, thereby further improving the accuracy of crack measurement;

[0038] When the raised part in the crack is longer, the inclined surface on one side of the frontmost bonding plate 24 cannot be squeezed, so that the bonding plate 24 can be rotated through the fixed shaft 25 when encountering resistance during movement, and then can be retracted in conjunction with the circular sliding rod 23, thereby avoiding the longer protrusion and the rotating bonding plate 24 can be attached to the front end of the protrusion. By avoiding hard collision with the protrusion, the measurement error is reduced and the measurement accuracy is improved.

[0039] Embodiment 3: An auxiliary cleaner is located at the top of the mobile frame 9 and is used to clean up impurities generated during detection; the auxiliary cleaner includes an air pump 10 installed on the top of the mobile frame 9, an air delivery channel 18 is provided inside the mobile frame 9, the air outlet of the air pump 10 is installed at the air inlet of the air delivery channel 18 through a pipeline, a bellows 19 is installed at the air outlet of the air delivery channel 18, a through groove for guiding air is provided inside the mobile block 15, and the air delivery channel 18 is connected to the through groove through the bellows 19, a plurality of groups of connecting grooves 28 are provided inside the striker 12, and each group of connecting grooves 28 is provided with two, one connecting groove 28 has an air outlet facing upward, and the other connecting groove 28 has an air outlet facing downward, the auxiliary cleaner also includes two electric telescopic rods 13 installed inside the mobile frame 9, The execution end of the electric telescopic rod 13 is fixedly connected to the rectangular plate 14, and a slide groove matching the rectangular plate 14 is provided inside the mobile frame 9, and the rectangular plate 14 is slidably connected inside the slide groove. A regulator for adjusting the blowing direction of the striker 12 is provided at the bottom of the rectangular plate 14, and the regulator includes two adjusting rods 17 slidably connected to the bottom of the rectangular plate 14, and the two adjusting rods 17 are symmetrically arranged with the center of the rectangular plate 14 as an axis, and a second rectangular groove 33, an air delivery groove 27 and a first rectangular groove 26 are provided on one side of the adjusting rod 17, the height of the second rectangular groove 33 is greater than the diameter of the bellows 19, and the bellows 19 passes through the inside of the second rectangular groove 33, the diameter of the air delivery groove 27 matches the diameter of the connecting groove 28, and the height of the first rectangular groove 26 is greater than the diameter of the fixed sleeve 21;

[0040] Before the striker 12 moves, the air pump 10 is started first. The air pump 10 inputs the outside air into the bellows 19 from the air delivery channel 18, and then inputs the air into the striker 12 from the through slot inside the moving block 15, and then passes through the air delivery slot 27, and blows the dust or debris in the bridge crack from the connecting slot 28 to blow it off, so that the measured data can be more accurate.

[0041] When the two strikers 12 are inserted downward to the bottom of the bridge crack for detection, the electric telescopic rod 13 is started to drive the rectangular plate 14 to move in the slide groove inside the moving frame 9, thereby driving the two adjusting rods 17 at the bottom of the rectangular plate 14 to move, and aligning the gas delivery groove 27 with the upward opening of the connecting groove 28, so that the gas can be sprayed upward at an angle, which can help clean up the fine debris and dust on the edge of the crack, reduce interference during measurement, and thus improve the accuracy of measurement;

[0042] When the two strikers 12 are inserted upward to the bottom of the bridge crack for detection, the position of the gas delivery groove 27 can be adjusted by the electric telescopic rod 13 so that the gas delivery groove 27 can be aligned with the connecting groove 28 with the opening facing downward, so that the gas can be sprayed obliquely into the crack. The gas is sprayed obliquely into the crack, which can generate a certain airflow impact force, which helps to clean the dust, debris, accumulated water or other impurities inside the crack. These impurities may interfere with subsequent crack detection or repair work. Therefore, its cleaning can ensure the accuracy of crack treatment and detection.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A bridge crack measuring device for bridge engineering that is easy to adjust, characterized in that: include: A fixed frame (1), a vacuum pump (2) is installed on the side wall of the fixed frame (1), the output end of the vacuum pump (2) is connected to two suction cups (3) through a pipeline, the suction cups (3) are fixed to the side wall of the fixed frame (1), the interior of the fixed frame (1) is rotatably connected to a movable plate (4) through a damping shaft, the interior of the movable plate (4) is rotatably connected to a second screw rod (11), the outer wall of the second screw rod (11) is threadedly connected to an adjustment plate (5), the adjustment plate (5) is slidably connected to the interior of the movable plate (4) through a slider, the inner side of the adjustment plate (5) is connected to a connecting plate (6) through a damping shaft, the side wall of the connecting plate (6) is fixedly connected to a fixed frame (7), the inner side of the fixed frame (7) is slidably connected to two sliding blocks (16), and a movable frame (9) is fixedly connected between the two sliding blocks (16); A striker (12), wherein two strikers (12) are provided, and the two strikers (12) are arranged at the bottom of the movable frame (9), and the two strikers (12) are arranged symmetrically with the center of the movable frame (9) as an axis; A crack inner distance detection component is located inside the mobile frame (9) and is used to detect the inner distance of the cracks in the bridge. The crack inner distance detection component comprises a first screw rod (8) rotatably connected to the inner side of the fixed frame (7), and one end of the first screw rod (8) passes through the outside of the fixed frame (7) and is fixedly connected to a ring. The outer wall of the first screw rod (8) is threadedly connected to the mobile frame (9). The inside of the mobile frame (9) is slidably connected to two moving blocks (15). The two moving blocks (15) are symmetrically arranged with the center of the mobile frame (9) as an axis. The bottom of the moving block (15) is fixedly connected to the striker (12). A first spring (20) is installed between one side of the moving block (15) and the inside of the mobile frame (9). An auxiliary detection component for assisting in detecting the crack inner distance is arranged inside the striker (12); The auxiliary detection component comprises a plurality of fixed sleeves (21) fixedly connected to the inside of the striker (12); a circular slide bar (23) is slidably connected to the inside of the fixed sleeve (21); a second spring (22) is installed between the fixed sleeve (21) and the circular slide bar (23); an infrared distance measuring receiver (32) is installed inside the fixed sleeve (21); an infrared distance measuring transmitter (31) is installed at one end of the circular slide bar (23); a plurality of mutually combined bonding plates (24) are installed at one end of the circular slide bar (23); and the plurality of bonding plates (24) are connected to each other via a connecting assembly; The connection assembly comprises a limit seat (30) fixedly connected to the end of the circular slide bar (23) and the ends of the plurality of bonding plates (24); the bottom of the limit seat (30) is rotatably connected to a fixed shaft (25); one end of the fixed shaft (25) passes through the outside of the limit seat (30) and is fixedly connected to the bonding plates (24); a torsion spring (29) is installed between the limit seat (30) and the fixed shaft (25); every two bonding plates (24) are connected via the fixed shaft (25); and a bonding plate (24) close to the circular slide bar (23) is connected to it via the fixed shaft (25); An auxiliary cleaner is located on the top of the movable frame (9) and is used to clean impurities generated during detection.

2. The easily adjustable bridge crack measuring device for bridge engineering according to claim 1 is characterized in that: The auxiliary cleaner comprises an air pump (10) mounted on the top of the movable frame (9); an air delivery channel (18) is provided inside the movable frame (9); an air outlet of the air pump (10) is mounted at an air inlet of the air delivery channel (18) through a pipeline; a bellows (19) is installed at the air outlet of the air delivery channel (18); a through groove for guiding air is provided inside the movable block (15); the air delivery channel (18) is connected to the through groove through the bellows (19); a plurality of groups of connecting grooves (28) are provided inside the striker (12); each group of connecting grooves (28) is provided with two connecting grooves, one connecting groove (28) having an air outlet facing upwards, and the other connecting groove (28) having an air outlet facing downwards.

3. The easily adjustable bridge crack measuring device for bridge engineering according to claim 2 is characterized in that: The auxiliary cleaner further comprises two electric telescopic rods (13) mounted inside the mobile frame (9), the execution ends of the electric telescopic rods (13) being fixedly connected to a rectangular plate (14), a slide groove matching the rectangular plate (14) being provided inside the mobile frame (9), and the rectangular plate (14) being slidably connected inside the slide groove, and a regulator for adjusting the blowing direction of the striker (12) being provided at the bottom of the rectangular plate (14).

4. The easily adjustable bridge crack measuring device for bridge engineering according to claim 3 is characterized in that: The regulator comprises two regulating rods (17) slidably connected to the bottom of the rectangular plate (14), and the two regulating rods (17) are symmetrically arranged with the center of the rectangular plate (14) as an axis. A second rectangular groove (33), a gas delivery groove (27) and a first rectangular groove (26) are formed on one side of the regulating rod (17), the height of the second rectangular groove (33) is greater than the diameter of the bellows (19), and the bellows (19) passes through the inside of the second rectangular groove (33), the diameter of the gas delivery groove (27) matches the diameter of the connecting groove (28), and the height of the first rectangular groove (26) is greater than the diameter of the fixing sleeve (21).

5. The easily adjustable bridge crack measuring device for bridge engineering according to claim 1 is characterized in that: The infrared distance measuring receiver (32) and the infrared distance measuring transmitter (31) are respectively located on one side of the two moving blocks (15), and the infrared distance measuring receiver (32) and the infrared distance measuring transmitter (31) are symmetrically arranged.

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