Stress detection device for bridge cable

Abstract

The utility model discloses a stress detection device for a bridge cable, which relates to the technical field of stress detection and comprises a cable and a first fixing ring, a first anchorage device and a second anchorage device are arranged on the cable, the first fixing ring is arranged outside the first anchorage device, a positive and negative rotation motor is mounted in the middle of the rear end of a shell, and the positive and negative rotation motor is connected with the first anchorage device. A rotating disc is connected to the outer portion of the driving shaft, a sliding seat is arranged at the rear end of the interior of the shell, a sliding plate is connected to the rear end of a sliding pin, a servo motor is installed at the front end of the frame, a lead screw nut is arranged on the outer portion of a bidirectional lead screw, and a clamping roller is installed on the roller frame. According to the stress detection device of the bridge inhaul cable, the servo motor drives the bidirectional lead screw to transmit, so that the roller frame performs linear displacement in the opposite direction or the back-to-back direction along the exterior of the bidirectional lead screw along with the lead screw nut, the distance between the clamping rollers can be adjusted according to the diameter of the first anchorage device, the adjustability of the device is improved, and the application range of the device is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of force detection, in particular to a force detection device for bridge cables. Background Technique

[0002] The cable components of long-span bridges are the main load-bearing components of the bridges, in a very crucial and core position. As force-bearing and force-transmitting components, the cables are in an environment of alternating stress, corrosion and wind vibration for a long time, which is likely to cause local fatigue and damage, directly affecting the internal force of the structure and the cable alignment, endangering the safety of the entire structure and bringing huge potential safety hazards to the use of the bridge. Therefore, it is necessary to regularly check the bridge cables through a force detection device to evaluate the change of cable tension.

[0003] For example, the utility model with the application number CN202221992924.0 discloses a force detection device for bridge cables. This utility model obtains the change in the elongation of the cable body by measuring the distance change between the first anchor and the second anchor each time, so as to monitor the force state of the cable in real time and judge whether the cable is in a safe state. This distance change detection device has a simple structure, is easy to install, has a low cost, and has a good detection effect. However, the first fixing ring and the second fixing ring are usually of the adapted type for the anchor, that is, one fixing ring is only suitable for one specification of the anchor, which limits the application range of the fixing ring and reduces the practicability of the device.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and a force detection device for bridge cables is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a force detection device for bridge cables to solve the problems put forward in the above background technique.

[0006] To achieve the above object, the present utility model provides the following technical solution: A force detection device for a bridge stay cable, comprising a stay cable and a first fixing ring. A first anchor and a second anchor are provided on the stay cable. The first fixing ring is disposed outside the first anchor, and the first fixing ring includes a housing, a forward and reverse motor, a drive shaft, a turntable, a sliding pin, a sliding plate, a sliding seat, a frame, a servo motor, a bidirectional lead screw, a lead screw nut, a roller frame, and a clamping roller. A forward and reverse motor is installed in the middle of the rear end of the housing, and the output end of the forward and reverse motor penetrates through the rear end of the housing and is connected to a drive shaft. A turntable is connected to the outside of the drive shaft, and a sliding pin is inserted through a chute on the surface of the turntable. A sliding seat is provided at the rear end inside the housing. The rear end of the sliding pin is connected to a sliding plate, and a frame is fixed to one side of the front end of the sliding plate. A servo motor is installed at the front end of the frame, and the output end of the servo motor penetrates through the front end of the frame and is connected to a bidirectional lead screw. A lead screw nut is provided on the outside of the bidirectional lead screw, and a roller frame is connected to the outside of the lead screw nut. A clamping roller is installed on the roller frame.

[0007] Further, the drive shaft penetrates through the middle of the sliding seat, and the sliding pin, the sliding plate, and the frame are of an integrated structure.

[0008] Further, the sliding plate and the frame are perpendicular to each other, and the drive shaft and the bidirectional lead screw are parallel to each other.

[0009] Further, the ratio of the number of the frame, the roller frame, and the clamping roller is 1:2:2, and the housing and the frame are perpendicular to each other.

[0010] Further, a first support plate is provided on the outside of the first fixing ring, and an infrared induction transmitter is disposed through the middle of the first support plate.

[0011] Further, a second fixing ring is provided outside the second anchor, and a second support plate is provided on the outside of the second fixing ring.

[0012] Further, both the first support plate and the second support plate are in an L-shaped structure, and the first fixing ring and the second fixing ring have the same structure.

[0013] The present utility model provides a force detection device for a bridge stay cable, having the following beneficial effects:

[0014] 1. The present utility model drives the bidirectional lead screw to rotate through the servo motor, so that the roller frame moves linearly in opposite or away directions along the outside of the bidirectional lead screw following the lead screw nut, thereby adjusting the distance between the clamping rollers according to the diameter of the first anchor, increasing the adjustability of the device, and expanding the applicable range of the device.

[0015] 2. In the present utility model, the first support plate and the second support plate are respectively arranged on the first anchor at the tail end of the cable and the second anchor at the head end of the cable. By turning on the infrared induction emitter, the infrared induction emitter emits infrared rays to the second support plate, and then the data of the distance between the first anchor and the second anchor is obtained. According to the change of the data measured each time, the change of the cable elongation is obtained, so as to achieve the purpose of detecting the force on the bridge cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of a force detection device for a bridge cable of the present utility model;

[0017] Figure 2 is a schematic top view structure diagram of the housing of a force detection device for a bridge cable of the present utility model;

[0018] Figure 3 is a schematic front three-dimensional structure diagram of the housing of a force detection device for a bridge cable of the present utility model;

[0019] Figure 4 is a schematic front sectional structure diagram of the housing of a force detection device for a bridge cable of the present utility model.

[0020] In the figure: 1. Cable; 2. First anchor; 3. Second anchor; 4. First fixing ring; 401. Housing; 402. Forward and reverse motor; 403. Driving shaft; 404. Turntable; 405. Sliding pin; 406. Sliding plate; 407. Sliding seat; 408. Frame; 409. Servo motor; 410. Bidirectional lead screw; 411. Lead screw nut; 412. Roller frame; 413. Clamping roller; 5. First support plate; 6. Infrared induction emitter; 7. Second fixing ring; 8. Second support plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following further describes in detail the embodiments of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0022] As Figures 1 to 4As shown in the figure, a stress detection device for a bridge stay cable includes a stay cable 1 and a first fixing ring 4. A first anchor 2 and a second anchor 3 are arranged on the stay cable 1. The first fixing ring 4 is arranged outside the first anchor 2. The first fixing ring 4 includes a housing 401, a forward and reverse motor 402, a drive shaft 403, a turntable 404, a sliding pin 405, a sliding plate 406, a sliding seat 407, a frame 408, a servo motor 409, a bidirectional lead screw 410, a lead screw nut 411, a roller frame 412 and a clamping roller 413. A forward and reverse motor 402 is installed in the middle of the rear end of the housing 401, and the output end of the forward and reverse motor 402 penetrates through the rear end of the housing 401 and is connected to a drive shaft 403. A turntable 404 is connected to the outside of the drive shaft 403, and a sliding pin 405 is inserted through a chute on the surface of the turntable 404. A sliding seat 407 is arranged at the rear end inside the housing 401. The rear end of the sliding pin 405 is connected to a sliding plate 406, and a frame 408 is fixed to one side of the front end of the sliding plate 406. A servo motor 409 is installed at the front end of the frame 408, and the output end of the servo motor 409 penetrates through the front end of the frame 408 and is connected to a bidirectional lead screw 410. A lead screw nut 411 is arranged on the outside of the bidirectional lead screw 410, and a roller frame 412 is connected to the outside of the lead screw nut 411. A clamping roller 413 is installed on the roller frame 412. The drive shaft 403 penetrates through the middle of the sliding seat 407, and the sliding pin 405, the sliding plate 406 and the frame 408 are of an integrated structure. The sliding plate 406 and the frame 408 are perpendicular to each other. The drive shaft 403 and the bidirectional lead screw 410 are parallel to each other. The ratio of the number of the frame 408, the roller frame 412 and the clamping roller 413 is 1:2:2, and the housing 401 and the frame 408 are perpendicular to each other.

[0023] The specific operation is as follows. The servo motor 409 is used to drive the bidirectional lead screw 410 to rotate, so that the roller frame 412 moves linearly towards or away from each other along the outside of the bidirectional lead screw 410 following the lead screw nut 411. Thus, the distance between the clamping rollers 413 can be adjusted according to the diameter of the first anchor 2, which increases the adjustability of the device and expands the applicable range of the device.

[0024] As Figure 1 shown in the figure, a first support plate 5 is arranged on the outside of the first fixing ring 4, and an infrared induction emitter 6 is arranged through the middle of the first support plate 5. A second fixing ring 7 is arranged outside the second anchor 3, and a second support plate 8 is arranged on the outside of the second fixing ring 7. Both the first support plate 5 and the second support plate 8 are in an L-shaped structure, and the first fixing ring 4 and the second fixing ring 7 have the same structure.

[0025] The specific operation is as follows. Since the first support plate 5 and the second support plate 8 are respectively arranged on the first anchor 2 at the tail end of the cable 1 and the second anchor 3 at the head end of the cable 1, by turning on the infrared induction emitter 6, the infrared induction emitter 6 emits infrared rays to the second support plate 8 to obtain the data of the distance between the first anchor 2 and the second anchor 3. According to the change of the data obtained by each measurement, the change of the elongation of the cable 1 is obtained, so as to achieve the purpose of detecting the force on the bridge cable 1.

[0026] In summary, for the force detection device of the bridge cable, when in use, first, the first anchor 2 and the second anchor 3 are respectively fixed at the head and tail ends of the cable 1 through the cold casting or hot casting process. When it is necessary to detect the force on the bridge cable 1, the first fixing ring 4 and the second fixing ring 7 can be respectively installed outside the first anchor 2 and the second anchor 3 in advance, that is, the forward and reverse motor 402 is operated to drive the drive shaft 403 and the turntable 404 to rotate. The turntable 404 drives the sliding pin 405 to make the sliding plate 406 perform a horizontal displacement in opposite directions within the sliding seat 407 until the distance between the frames 408 is adjusted to be consistent with the outer diameter of the first anchor 2.

[0027] At this time, the frames 408 are closely attached to both sides of the first anchor 2. By operating the servo motor 409 to drive the bidirectional lead screw 410 to drive, the lead screw nut 411 drives the roller frame 412 to perform a linear displacement in opposite directions along the outside of the bidirectional lead screw 410, so as to adjust the distance between the clamping rollers 413, and make the clamping rollers 413 keep in contact with the outside of the first anchor 2, avoiding the first fixing ring 4 falling off the first anchor 2 due to external actions such as wind force during the detection process. In this way, the applicable range of the first fixing ring 4 is expanded, so that the device can be adapted to cables 1 with different diameters and different specifications of anchors, increasing the adjustability of the device and improving the practicability of the device.

[0028] Since the first fixing ring 4 and the second fixing ring 7 have the same structure, the above-mentioned same operation method can be adopted to install the second fixing ring 7 outside the second anchor 3 (as Figure 1 shown). At this time, the infrared induction emitter 6 is turned on again. The infrared induction emitter 6 on the first support plate 5 emits infrared rays to the second support plate 8 and obtains the data of the distance between the first anchor 2 and the second anchor 3, and makes it obtain the change of the elongation of the cable 1 according to the change of the data obtained by each measurement, so as to achieve the purpose of detecting the force on the bridge cable 1.

[0029] The embodiments of the present invention are given for the purpose of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes.

Claims

1. A stress detection device for a bridge stay cable, comprising a stay cable (1) and a first fixing ring (4), characterized in that, A first anchor (2) and a second anchor (3) are provided on the cable (1). The first fixing ring (4) is arranged outside the first anchor (2), and the first fixing ring (4) includes a housing (401), a forward and reverse motor (402), a drive shaft (403), a turntable (404), a sliding pin (405), a sliding plate (406), a sliding seat (407), a frame (408), a servo motor (409), a bidirectional lead screw (410), a lead screw nut (411), a roller frame (412) and a clamping roller (413). A forward and reverse motor (402) is installed in the middle of the rear end of the housing (401), and the output end of the forward and reverse motor (402) penetrates through the rear end of the housing (401) and is connected with a drive shaft (403). A turntable (404) is connected to the outside of the drive shaft (403), and a sliding pin (405) is arranged in the chute on the surface of the turntable (404). A sliding seat (407) is arranged at the rear end inside the housing (401). The rear end of the sliding pin (405) is connected with a sliding plate (406), and a frame (408) is fixed on one side of the front end of the sliding plate (406). A servo motor (409) is installed at the front end of the frame (408), and the output end of the servo motor (409) penetrates through the front end of the frame (408) and is connected with a bidirectional lead screw (410). A lead screw nut (411) is arranged on the outside of the bidirectional lead screw (410), and a roller frame (412) is connected to the outside of the lead screw nut (411). A clamping roller (413) is installed on the roller frame (412).

2. The force detection device for a bridge stay cable according to claim 1, wherein, The drive shaft (403) penetrates through the middle of the sliding seat (407), and the sliding pin (405), the sliding plate (406) and the frame (408) are of an integrated structure.

3. The force detection device for a bridge stay cable according to claim 1, characterized in that, The sliding plate (406) and the frame (408) are perpendicular to each other, and the drive shaft (403) and the bidirectional lead screw (410) are parallel to each other.

4. The force detection device for a bridge stay cable according to claim 1, wherein, The ratio of the number of the frame (408), the roller frame (412) and the clamping roller (413) is 1:2:2, and the housing (401) and the frame (408) are perpendicular to each other.

5. The force detection device for a bridge stay cable according to claim 1, characterized in that, A first support plate (5) is arranged outside the first fixing ring (4), and an infrared induction transmitter (6) is arranged through the middle of the first support plate (5).

6. The force detection device for a bridge stay cable according to claim 5, wherein, A second fixing ring (7) is arranged outside the second anchor (3), and a second support plate (8) is arranged outside the second fixing ring (7).

7. The force detection device for a bridge stay cable according to claim 6, characterized in that, Both the first support plate (5) and the second support plate (8) are in an L-shaped structure, and the first fixing ring (4) and the second fixing ring (7) have the same structure.

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