A laser detection device for the traversing distance of a bridge erecting machine

Abstract

The present invention discloses a laser detection device for the span distance of a bridge girder erecting machine, which relates to the field of bridge girder erecting machines and includes bridge piers and a main girder. A main girder is arranged above the bridge piers, and adjusting mechanisms, a first detection mechanism, and a second detection mechanism are symmetrically arranged on the front and rear of the main girder. The adjusting mechanisms are fixed on the main girder, and the first detection mechanism is installed on the adjusting mechanisms. This laser detection device for the span distance of a bridge girder erecting machine can detect the width of the bridge piers by using the first detection mechanism. With the cooperation of the limiting mechanism, the accuracy of the measurement data can be guaranteed, so that the installation position of the support base can be conveniently determined. Specifically, the initial measurement position can be determined through the contact sensor, and the distance between the first laser rangefinder and the first protective cover can be adjusted by cooperating with the adjusting mechanism, so as to realize the detection function of the width of the bridge pier. And when the limiting mechanism is separated from the bridge pier, the measurement function is stopped to ensure the accuracy of the detection data.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge erecting machines, and particularly to a laser detection device for the span distance of a bridge erecting machine during jacking Background Art

[0002] A bridge erecting machine is a device for assisting in the installation of beam slabs. It mainly places precast beam slabs on precast bridge piers. The jacking of a bridge erecting machine refers to the operation process in bridge construction where the end of the bridge erecting machine moves from one bridge pier to another. This process is a key link in bridge construction, related to construction progress, bridge quality, and construction safety;

[0003] At present, during the jacking of a bridge erecting machine, the distance measurement mainly relies on manual workers under the bridge pier to measure the distance by visual inspection or measuring instruments. It is difficult to ensure the accuracy of detection. Especially when the two bridge piers are not on the same straight line, the detection data has a large gap, resulting in uneven stress on the bridge pier and certain potential safety hazards. Therefore, in view of the above problems, a laser detection device for the span distance of a bridge erecting machine is designed to better meet the actual use requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a laser detection device for the span distance of a bridge erecting machine to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A laser detection device for the span distance of a bridge erecting machine, including a bridge pier and a main beam. The main beam is arranged above the bridge pier. Adjusting mechanisms, a first detection mechanism, and a second detection mechanism are symmetrically arranged on the main beam in the front and back. The adjusting mechanism is fixed on the main beam. The first detection mechanism is installed on the adjusting mechanism. The first detection mechanism is connected to the second detection mechanism. Limiting mechanisms are installed on both the second detection mechanism and the first detection mechanism. The first detection mechanism includes a mounting frame, a first laser rangefinder, a movable plate, a contact sensor, a first protective cover, a square rod, and a first spring. The first laser rangefinder is fixed on the mounting frame, and a limiting mechanism is fixed at the lower end of the first laser rangefinder. A movable plate is arranged below the mounting frame. The contact sensor is fixed on the movable plate, and the end of the contact sensor is flush with the central axis of the support base. A first protective cover is also fixed on the movable plate. The first protective cover is nested with the first laser rangefinder. The movable plate is slidably connected to the square rod. The square rod is fixed on the mounting frame. One end of the square rod is fixed to one end of the first spring, and the other end of the first spring is fixed to the mounting frame. When the contact sensor contacts the bridge pier to achieve the initial position limit, and with the cooperation of the adjusting mechanism to drive the mounting frame and the first laser rangefinder to move, the width of the bridge pier is measured. And during the measurement process, when the limiting mechanism is separated from the bridge pier, the width L of the bridge pier is obtained, and then with the cooperation of the second detection mechanism, the detection of the distance between the main beam and the bridge pier before and after is realized.

[0006] Preferably, a connecting frame is fixed on the upper end surface of the main beam, and hydraulic support rods are symmetrically fixed on the front and rear of the lower end surface of the connecting frame, and the output ends of the hydraulic support rods are fixed on the support base. Through the above structure, stable support can be provided after the main beam passes through the hole, ensuring the stability of the device.

[0007] Preferably, the adjusting mechanism includes a fixing plate, a motor, a first threaded rod, a connecting block, a guiding rod, a mounting plate and a hydraulic rod. The fixing plate is fixed on the main beam, and a motor is fixed on the fixing plate, and the output end of the motor is fixed with a first threaded rod. At the same time, the first threaded rod is connected to the fixing plate by a bearing. The first threaded rod is connected to the connecting block through a thread. Through the action of the motor and the first threaded rod, it can provide a basic guarantee for the position adjustment of the connecting block and the mounting frame, thus providing a basic guarantee for realizing the width measurement of the bridge pier.

[0008] Preferably, the connecting block is slidably connected to the guiding rod fixed on the fixing plate, and a mounting plate is fixed at the lower end of the connecting block, and hydraulic rods are symmetrically fixed on the left and right of the lower end of the mounting plate. At the same time, the output ends of the hydraulic rods are fixed on the mounting frame. Through the action of the hydraulic rods, the height adjustment of the mounting frame can be realized, ensuring the normal progress of the detection.

[0009] Preferably, the second detection mechanism includes a fixing frame, a second threaded rod, a gear, a rack, a movable block, a fixing rod, a second laser rangefinder and a second protective cover. The fixing frame is fixed on the mounting frame, and a second threaded rod is connected to the fixing frame by a bearing, and a gear is fixed on the second threaded rod. At the same time, the gear meshes with the rack. Through the meshing transmission between the gear and the rack, it can provide a basic guarantee for the front and rear position adjustment of the second laser rangefinder, thus ensuring the normal operation of the device.

[0010] Preferably, the rack is slidably connected to the mounting frame, and the rack is fixedly connected to the movable plate. When the rack moves, through the sliding guiding action between the rack and the mounting frame, the stability of the rack movement can be ensured.

[0011] Preferably, the second threaded rod is connected to the movable block through a thread, and the movable block is slidably connected to the fixing rod, and the fixing rod is fixed on the fixing frame. When the movable block moves, in cooperation with the sliding guiding action between the movable block and the fixing rod, the stability of the movable block movement can be ensured.

[0012] Preferably, a second laser rangefinder is fixed on the movable block, and a limiting mechanism is fixed at the lower end of the second laser rangefinder, and the second laser rangefinder is nested with the second protective cover. At the same time, the second protective cover is fixed on the mounting frame.

[0013] Preferably, the limiting mechanism includes a cylinder, a pressure sensor, a second spring, a slide bar and a ball. The cylinder is fixedly connected to the second laser rangefinder, and the pressure sensor is fixed inside the cylinder. Moreover, a second spring is fixed between the pressure sensor and the slide bar. With the above structure, limiting can be achieved during the detection of the device, thus ensuring the accuracy of the detection data.

[0014] Preferably, the slide bar is slidably connected to the cylinder, and a ball is installed at the lower end of the slide bar. Moreover, the ball can roll when it contacts the bridge pier. During the movement of the detection device, the rolling action between the ball and the bridge pier can reduce the friction between the slide bar and the bridge pier, ensuring the normal operation of the device.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. For this laser detection device for the span distance of the bridge erecting machine, by adopting the first detection mechanism, the detection of the width of the bridge pier can be realized. With the cooperation of the limiting mechanism, the accuracy of the measurement data can be ensured, so as to conveniently determine the installation position of the support base. Specifically, the initial measurement position can be determined through the contact sensor, and the distance between the first laser rangefinder and the first protective cover can be adjusted by cooperating with the adjustment mechanism, thus realizing the detection function of the width of the bridge pier. Moreover, when the limiting mechanism is separated from the bridge pier, the measurement function stops, ensuring the accuracy of the detection data.

[0017] 2. For this laser detection device for the span distance of the bridge erecting machine, by adopting the linked second detection mechanism, the distances between the front and rear ends of the bridge pier and the main beam can be realized, so as to adjust the installation position of the support base subsequently. Specifically, the movement of the movable plate drives the movement of the rack. With the transmission between the rack and the gear, the second laser rangefinder moves, thus realizing the detection of the distances between the front and rear ends of the bridge pier and the main beam, so as to determine the installation position of the support base subsequently. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front three-dimensional structure schematic diagram of the overall composition of the device of the present invention;

[0019] Figure 2 It is a side three-dimensional structure schematic diagram of the overall composition of the device of the present invention;

[0020] Figure 3 It is a bottom three-dimensional structure schematic diagram composed of the adjustment mechanism, the first detection mechanism and the second detection mechanism of the present invention;

[0021] Figure 4 It is a front three-dimensional structure schematic diagram of the working state of the first detection mechanism and the second detection mechanism of the present invention;

[0022] Figure 5Schematic diagram of the side view three-dimensional structure composed of the first detection mechanism and the second detection mechanism of the present invention;

[0023] Figure 6 Schematic diagram of the upward view three-dimensional structure of the limit mechanism of the present invention;

[0024] Figure 7 Schematic diagram of the front view sectional three-dimensional structure of the limit mechanism of the present invention.

[0025] In the figure: 1, pier; 2, main beam; 201, connecting frame; 202, hydraulic support rod; 203, support base; 3, adjustment mechanism; 301, fixed plate; 302, motor; 303, first threaded rod; 304, connecting block; 305, guide rod; 306, mounting plate; 307, hydraulic rod; 4, first detection mechanism; 401, mounting frame; 402, first laser rangefinder; 403, movable plate; 404, contact sensor; 405, first protective cover; 406, square rod; 407, first spring; 5, second detection mechanism; 501, fixed frame; 502, second threaded rod; 503, gear; 504, rack; 505, movable block; 506, fixed rod; 507, second laser rangefinder; 508, second protective cover; 6, limit mechanism; 601, cylinder; 602, pressure sensor; 603, second spring; 604, slide rod; 605, ball. Specific implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. 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 shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1-7, the present invention provides a technical solution: a laser detection device for the overhole distance of a bridge erector, including a pier 1 and a main beam 2. The main beam 2 is arranged above the pier 1. Adjusting mechanisms 3, a first detection mechanism 4 and a second detection mechanism 5 are symmetrically arranged before and after on the main beam 2. The adjusting mechanism 3 is fixed on the main beam 2, the first detection mechanism 4 is installed on the adjusting mechanism 3, the first detection mechanism 4 is connected to the second detection mechanism 5, and limiting mechanisms 6 are installed on both the second detection mechanism 5 and the first detection mechanism 4. The first detection mechanism 4 includes a mounting frame 401, a first laser rangefinder 402, a movable plate 403, a contact sensor 404, a first protective cover 405, a square rod 406 and a first spring 407. The first laser rangefinder 402 is fixed on the mounting frame 401, and the limiting mechanism 6 is fixed at the lower end of the first laser rangefinder 402. A movable plate 403 is arranged below the mounting frame 401, the contact sensor 404 is fixed on the movable plate 403, and the end of the contact sensor 404 is flush with the central axis of the support base 203. The first protective cover 405 is also fixed on the movable plate 403, and the first protective cover 405 is nested with the first laser rangefinder 402. The movable plate 403 is slidably connected to the square rod 406, the square rod 406 is fixed on the mounting frame 401, one end of the square rod 406 is fixed to one end of the first spring 407, and the other end of the first spring 407 is fixed on the mounting frame 401. When the contact sensor 404 contacts the pier 1 to realize the initial position limitation, the adjusting mechanism 3 drives the mounting frame 401 and the first laser rangefinder 402 to move to realize the measurement of the width of the pier 1. During the measurement process, when the limiting mechanism 6 is separated from the pier 1, the width L of the pier 1 is obtained, and then with the cooperation of the second detection mechanism 5, the detection of the distance between the main beam 2 and the pier 1 before and after is realized.

[0028] The adjusting mechanism 3 includes a fixed plate 301, a motor 302, a first threaded rod 303, a connecting block 304, a guide rod 305, a mounting plate 306, and a hydraulic rod 307. The fixed plate 301 is fixed on the main beam 2, and the motor 302 is fixed on the fixed plate 301. The output end of the motor 302 is fixed with the first threaded rod 303. At the same time, the first threaded rod 303 is connected to the fixed plate 301 by bearings. The first threaded rod 303 is connected to the connecting block 304 through threads; the connecting block 304 is slidably connected to the guide rod 305 fixed on the fixed plate 301. The lower end of the connecting block 304 is fixed with a mounting plate 306, and the lower end of the mounting plate 306 is symmetrically fixed with hydraulic rods 307 on the left and right. At the same time, the output ends of the hydraulic rods 307 are fixed on the mounting frame 401; the limiting mechanism 6 includes a cylinder 601, a pressure sensor 602, a second spring 603, a sliding rod 604, and a ball 605. The cylinder 601 is fixedly connected to the second laser range finder 507. The pressure sensor 602 is fixed inside the cylinder 601, and the second spring 603 is fixed between the pressure sensor 602 and the sliding rod 604; the sliding rod 604 is slidably connected to the cylinder 601. The lower end of the sliding rod 604 is provided with a ball 605, and the ball 605 can roll in contact with the bridge pier 1;

[0029] When using the laser detection device for the span distance of the bridge erecting machine, such as Figures 1-7As shown in the figure, first, the main beam 2 is moved closer to the pier 1 by the driving mechanism, and the hydraulic rod 307 is extended so that the contact sensor 404 is lower than the upper end surface of the pier 1. During the process of the main beam 2 moving closer to the pier 1, when the contact sensor 404 contacts the pier 1, at this time, the driving mechanism makes the main beam 2 stop moving closer to the pier 1. At this time, the initial measurement position is determined, and then the hydraulic rod 307 is controlled to extend. When the ball 605 contacts the pier 1, the sliding rod 604 is forced to slide, so that the second spring 603 is forced to contract, and the pressure sensor 602 detects the pressure. When the pressure of the pressure sensor 602 reaches the preset value (10 N), the hydraulic rod 307 stops extending at this time, and the motor 302 is started to drive the first threaded rod 303 to rotate. With the threaded connection between the first threaded rod 303 and the connecting block 304 and the sliding guiding function between the connecting block 304 and the guiding rod 305, the connecting block 304, the mounting plate 306 and the mounting bracket 401 move to the left. At this time, since the contact sensor 404 contacts the pier 1 to achieve limit, the movable plate 403 moves to the right relative to the mounting bracket 401, so that the distance between the first laser rangefinder 402 and the first protective cover 405 increases. By measuring the distance between the first laser rangefinder 402 and the first protective cover 405 with the first laser rangefinder 402, the detection of the width of the pier 1 can be realized. And when the mounting bracket 401 moves, the limiting mechanism 6 below the first laser rangefinder 402 is driven to move synchronously. When the ball 605 separates from the pier 1, at this time, under the elastic action of the second spring 603, the sliding rod 604 is reset, so that the pressure sensor 602 no longer detects the pressure. At this time, the distance L1 between the first laser rangefinder 402 and the first protective cover 405 is the width of the pier 1;

[0030] The second detection mechanism 5 includes a fixed bracket 501, a second threaded rod 502, a gear 503, a rack 504, a movable block 505, a fixed rod 506, a second laser rangefinder 507 and a second protective cover 508. The fixed bracket 501 is fixed on the mounting bracket 401, and the second threaded rod 502 is connected to the fixed bracket 501 by a bearing. And a gear 503 is fixed on the second threaded rod 502, and at the same time, the gear 503 meshes with the rack 504; the rack 504 is slidably connected to the mounting bracket 401, and the rack 504 is fixedly connected to the movable plate 403; the second threaded rod 502 is connected to the movable block 505 by a thread, and the movable block 505 is slidably connected to the fixed rod 506, and the fixed rod 506 is fixed on the fixed bracket 501; a second laser rangefinder 507 is fixed on the movable block 505, and a limiting mechanism 6 is fixed at the lower end of the second laser rangefinder 507. And the second laser rangefinder 507 is nested with the second protective cover 508, and at the same time, the second protective cover 508 is fixed on the mounting bracket 401;

[0031] During the detection process, as Figures 1-7 shown, when the movable plate 403 moves rightward relative to the mounting frame 401, the rack 504 moves relative to the gear 503. With the transmission effect between the gear 503 and the rack 504, the second threaded rod 502 rotates. With the threaded connection effect between the second threaded rod 502 and the movable block 505 and the sliding connection effect between the movable block 505 and the fixed rod 506, the movable block 505 slides stably, thereby driving the second laser rangefinder 507 and the limiting mechanism 6 below the second laser rangefinder 507 to move. By detecting the distance between the second laser rangefinder 507 and the second protective cover 508, the distances between the front and rear ends of the bridge pier 1 and the front and rear ends of the main beam 2 can be detected. According to the above principle, when the ball 605 on the limiting mechanism 6 below the second laser rangefinder 507 separates from the bridge pier 1, the measurement data is obtained. At this time, the distance between the front second laser rangefinder 507 and the second protective cover 508 is the distance L2 between the front end of the bridge pier 1 and the front end of the main beam 2, and the distance between the rear second laser rangefinder 507 and the second protective cover 508 is the distance L3 between the rear end of the bridge pier 1 and the rear end of the main beam 2. When L2 > L3, it indicates that the main beam 2 is deflected backward relative to the bridge pier 1. When L2 < L3, it indicates that the main beam 2 is deflected forward relative to the bridge pier 1. When L2 = L3, it indicates that the main beam 2 is in the center position of the bridge pier 1;

[0032] A connecting frame 201 is fixed on the upper end surface of the main beam 2, and hydraulic support rods 202 are symmetrically fixed on the front and rear of the lower end surface of the connecting frame 201, and the output ends of the hydraulic support rods 202 are fixed on the support base 203;

[0033] According to the above principle, the position of the main beam 2 can be adjusted by the driving mechanism, so as to ensure the installation position of the main beam 2 and the bridge pier 1. After the adjustment is completed, by controlling the extension of the hydraulic support rods 202, the support base 203 can be brought into contact with the bridge pier 1 to achieve support, effectively avoiding deviation in the installation position of the main beam 2, thereby ensuring construction safety. This is the working principle of the laser detection device for the span distance of this bridge erecting machine.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bridge erection machine through-hole distance laser detection device, comprising a bridge pier (1), a main beam (2), a movable block (505) and a second laser rangefinder (507), wherein the main beam (2) is arranged above the bridge pier (1), and characterized in that: The main beam (2) is symmetrically provided with an adjustment mechanism (3), a first detection mechanism (4) and a second detection mechanism (5); the adjustment mechanism (3) is fixed on the main beam (2); the adjustment mechanism (3) is equipped with the first detection mechanism (4); the first detection mechanism (4) and the second detection mechanism (5) are connected to each other; the second detection mechanism (5) and the first detection mechanism (4) are both equipped with a limit mechanism (6); the first detection mechanism (4) comprises a mounting frame (401), a first laser rangefinder (402), a movable plate (403), a contact sensor (404), a first protective cover (405) and a plurality of contact sensors (406). ), a square rod (406) and a first spring (407), a first laser rangefinder (402) is fixed on the mounting frame (401), and a limiting mechanism (6) is fixed at the lower end of the first laser rangefinder (402), a movable plate (403) is arranged below the mounting frame (401), a contact sensor (404) is fixed on the movable plate (403), and the end of the contact sensor (404) is flush with the central axis of the support base (203), and a first protective cover (405) is also fixed on the movable plate (403), and the first protective cover (405) and the first laser rangefinder (402) are nested. When the contact sensor (404) contacts the pier (1) to achieve initial position limitation, the adjustment mechanism (3) drives the mounting frame (401) and the first laser rangefinder (402) to move, thereby measuring the width of the pier (1). During the measurement process, when the limiting mechanism (6) is separated from the pier (1), the width L of the pier (1) is obtained. Then, in cooperation with the second detection mechanism (5), the distance between the main beam (2) and the pier (1) is detected. The second laser rangefinder (507) is fixed on the movable block (505), and the limiting mechanism (6) is fixed at the lower end of the second laser rangefinder (507). The mechanism (6) comprises a cylinder (601), a pressure sensor (602), a second spring (603), a sliding rod (604) and a ball (605); the cylinder (601) and the second laser rangefinder (507) are fixedly connected, the pressure sensor (602) is fixed inside the cylinder (601), and the second spring (603) is fixed between the pressure sensor (602) and the sliding rod (604); the sliding rod (604) and the cylinder (601) are slidably connected, and a ball (605) is installed at the lower end of the sliding rod (604), and the ball (605) contacts the bridge pier (1) and can roll.

2. A bridge erection machine through-hole distance laser detection device according to claim 1, characterized in that: A connecting frame (201) is fixed to the upper end surface of the main beam (2), and hydraulic support rods (202) are symmetrically fixed to the lower end surface of the connecting frame (201), and the output end of the hydraulic support rod (202) is fixed to a support base (203).

3. A bridge erection machine through-hole distance laser detection device according to claim 1, characterized in that: The adjusting mechanism (3) comprises a fixing plate (301), a motor (302), a first threaded rod (303), a connecting block (304), a guide rod (305), a mounting plate (306) and a hydraulic rod (307); the fixing plate (301) is fixed on the main beam (2); the motor (302) is fixed on the fixing plate (301); the output end of the motor (302) is fixed with the first threaded rod (303); the first threaded rod (303) is bearing-connected to the fixing plate (301); and the first threaded rod (303) is connected to the connecting block (304) via threads.

4. A bridge erection machine through-hole distance laser detection device according to claim 3, characterized in that: The connecting block (304) is slidably connected to a guide rod (305) fixed on the fixing plate (301), and a mounting plate (306) is fixed to the lower end of the connecting block (304), and hydraulic rods (307) are symmetrically fixed to the lower end of the mounting plate (306), and the output end of the hydraulic rod (307) is fixed to the mounting frame (401).

5. The laser detection device for the through-hole distance of a bridge erection machine according to claim 1 is characterized in that: The second detection mechanism (5) comprises a fixed frame (501), a second threaded rod (502), a gear (503), a rack (504), a movable block (505), a fixed rod (506), a second laser rangefinder (507) and a second protective cover (508); the fixed frame (501) is fixed on the mounting frame (401), the second threaded rod (502) is connected to a bearing on the fixed frame (501), the second threaded rod (502) is fixed with a gear (503), and the gear (503) and the rack (504) are meshed with each other.

6. A bridge erection machine through-hole distance laser detection device according to claim 5, characterized in that: The rack (504) and the mounting frame (401) are slidably connected, and the rack (504) and the movable plate (403) are fixedly connected.

7. The laser detection device for the through-hole distance of a bridge erection machine according to claim 5 is characterized in that: The second threaded rod (502) is connected to the movable block (505) via a thread, and the movable block (505) is slidably connected to the fixed rod (506), and the fixed rod (506) is fixed on the fixed frame (501).

8. The bridge erection machine through-hole distance laser detection device according to claim 5, characterized in that: The second laser rangefinder (507) and the second protective cover (508) are nested and connected, and the second protective cover (508) is fixed on the mounting frame (401).

9. A bridge erection machine through-hole distance laser detection device according to claim 8, characterized in that: The movable plate (403) and the square rod (406) are slidably connected, the square rod (406) is fixed on the mounting frame (401), the square rod (406) and one end of the first spring (407) are fixed to each other, and the other end of the first spring (407) is fixed on the mounting frame (401).

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