Bridge cable tension testing device and use method thereof

Abstract

The present invention provides a bridge cable tension test device and a method of using the same, which relates to the technical field of cable tension test, including a push sleeve, wherein the upper and lower ends of the push sleeve are respectively connected to oil cylinders, and each of the oil cylinders is respectively sealed and slidably connected to a piston disk, and each of the piston disks is respectively installed with multiple push rods, and each of the push rods is respectively connected to the frame, and two groups of oil inlet sleeves are installed in the push sleeve at equal intervals along the axis, and each of the oil inlet sleeves is respectively sealed and slidably connected to a sealing rod, and each of the sealing rods is respectively coaxially installed with a transverse rod, and the device adopts a hydraulic pushing mechanism, and the cooperation of the oil cylinder and piston system realizes convenient transportation of the cable, this design reduces the burden of manual operation, and makes the transportation process of heavy cables easy and controllable, and the system can apply force evenly through the synchronous movement of multiple groups of transverse rods, thereby avoiding deformation or damage of the cable during transportation.

Description

Technical Field

[0001] The present invention relates to the technical field of cable tension testing, and more particularly to a bridge cable tension testing device and a method for using the same. Background Art

[0002] In modern bridge engineering, cables are key load-bearing components, and their tensile testing is an important part of ensuring bridge safety. However, the cable testing devices currently available on the market face serious operational difficulties in actual applications. Due to the heavy weight and long length of bridge cables, a single cable often weighs hundreds or even thousands of kilograms, making it difficult for testers to effectively control and accurately position them during tensile testing. Traditional testing methods often require the coordinated operation of multiple staff members, consuming a lot of human resources and easily causing safety hazards.

[0003] In addition, in the process of sending the cable into the testing equipment, due to the lack of effective auxiliary devices and guiding mechanisms, operators often need to repeatedly adjust the position and angle of the cable, which not only prolongs the test preparation time, but also increases the labor intensity of the staff. Especially in some small or irregular test sites, the transportation and positioning of the cable are even more difficult. This operational inconvenience not only reduces the test efficiency, but may also affect the accuracy of the test results, thereby bringing unnecessary troubles to the bridge quality inspection work. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to the problems existing in the prior art, the present invention provides a bridge cable tension testing device and a method of using the same to solve the technical problems mentioned in the background technology.

[0006] (2) Technical solution

[0007] Material toggling mechanism, its both ends are connected with the up-down knob.The control wheel that the handle is connected with the up-down knob.The control wheel that the handle is connected with the up-down knob.The control wheel that the handle is connected with the up-down knob.

[0008] Preferably, the pushing mechanism also includes a through sleeve installed in the two oil cylinders, and a limiting ring is installed in each oil cylinder. A plurality of the lateral rods are slidably connected with a pressure block, the protruding ends of the two hydraulic cylinders are connected to the pressure block, the movable frame is installed on the pressure block, and two follower rods are installed on the pressure block, and the follower rods are slidably connected in the through sleeve.

[0009] Preferably, two follower blocks are respectively mounted on the two follower rods, and the two follower blocks are respectively clamped on both sides of the oil cylinder.

[0010] Preferably, each of the sealing rods is provided with an internal hole, and each of the internal holes is connected to a tension spring, and the other sides of the tension springs are connected to the inner wall of the push sleeve, and each of the oil inlet sleeves is provided with multiple oil inlet grooves on one side close to the inner wall of the push sleeve.

[0011] Preferably, an oil storage pipe is connected and installed on the side wall of the constant pressure pipe, and the constant pressure pipe is provided with a one-way groove, a one-way disk is fitted on the one-way groove, and micro-flow holes are provided on the one-way disk.

[0012] Preferably, a threaded rod is threadedly connected to the constant pressure tube, and the guide rod is slidingly connected to the threaded rod. A sliding sleeve is coaxially installed at the lower end of the threaded rod, and the sliding sleeve is slidingly connected to the constant pressure tube. A hexagonal block is installed at the upper end of the threaded rod.

[0013] Preferably, a spring is slidably sleeved inside the guide rod, and two ends of the spring respectively abut against the threaded rod and the one-way disc.

[0014] Preferably, the clamping mechanism further comprises a plurality of adjustment cylinders mounted on the fixed frame and the movable frame, and the protruding end of each adjustment cylinder is respectively connected to the clamping block.

[0015] Preferably, an intermediate sleeve is slidably connected to the two follower rods, and return springs are respectively installed at both ends of the intermediate sleeves, and the two ends of the two return springs are respectively in contact with the fixed frame and the movable frame, a protective sleeve is installed on the intermediate sleeve, and the protective sleeve and the intermediate hole are coaxially arranged.

[0016] The present invention provides a bridge cable tension testing device and a method for using the same, comprising the following steps:

[0017] Step 1: Initial cable delivery: When the cable needs to be tested, first place the cable in the frame and insert one end of it into the push sleeve and the middle hole. After starting the hydraulic cylinder, the entire push system is driven to move through the pressure block and the follower mechanism. At this time, since the push rod is fixed to the frame, the piston plate moves in the cylinder, pushing the hydraulic oil into the oil inlet sleeve, causing the sealing rod and the transverse rod to extend outward, thereby grabbing the cable and driving it to move;

[0018] Step 2: Reciprocating cyclic conveying: After completing one push, the system needs to perform reciprocating motion to continue conveying the cable. When it stops moving, the hydraulic oil slowly flows into the oil storage pipe through the micro-hole. At the same time, under the action of the tension spring, the sealing rod and the transverse rod begin to return, temporarily releasing the contact with the cable. When the hydraulic cylinder moves in the opposite direction, the hydraulic oil in the cylinder flows back, completing a reciprocating cycle. This is repeated until the cable reaches the specified position.

[0019] Step 3: Tensile test process: When the cable is in place, turn the hexagonal block to stop the transverse rod from working, and then control the clamping block through the adjustment cylinder to clamp the two ends of the cable. After the cable passes through the protective cover, start the hydraulic cylinder to move the mobile frame away from the fixed frame. At this time, the clamping block and the cable produce a self-locking effect, and the tensile test begins. During the whole process, the protective cover plays a guiding and safety protection role, effectively preventing the danger that may be caused by the breakage of the cable.

[0020] (3) Beneficial effects

[0021] Compared with the prior art, the present invention provides a bridge cable tension testing device and a method for using the same, which have the following beneficial effects:

[0022] The device adopts a hydraulic driving mechanism, which realizes the convenient transportation of the cable through the cooperation of the cylinder and piston system. This design reduces the burden of manual operation and makes the transportation process of heavy cables easy and controllable. The system can apply force evenly through the synchronous movement of multiple sets of transverse rods, avoiding deformation or damage of the cable during transportation. The driving force is controlled by the cooperation of the constant pressure tube and the one-way valve. When the pressure exceeds the set value, the system will automatically adjust to ensure that the force applied to the cable always remains within a safe range. This design not only protects the cable, but also improves the accuracy of the test. The automatic return function is realized through the cooperation of the micro-pore and the oil storage pipe. This design enables the device to perform continuous reciprocating motion, improving work efficiency. At the same time, the tension spring system ensures the smooth and controllable return process. The device is equipped with a special protective cover device, which can effectively prevent the danger caused by the breakage of the cable during the test. At the same time, the operation process of the entire system is under control, reducing the operational risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a bridge cable tension testing device and its use method in the present invention;

[0024] Figure 2 Schematic diagram of the structure of the push sleeve, oil cylinder and constant pressure tube in the present invention;

[0025] Figure 3 Schematic diagram of the cross-sectional structure of the oil cylinder and the push sleeve in the present invention;

[0026] Figure 4 Schematic diagram of the cross-sectional structure of the oil inlet sleeve in the present invention;

[0027] Figure 5 Schematic diagram of the cross-sectional structure of the constant pressure pipe and the oil storage pipe in the present invention;

[0028] Figure 6 Schematic diagram of the structure of the guide rod and the one-way disc in the present invention;

[0029] Figure 7 It is a structural schematic diagram of the fixed frame and the movable frame in the present invention.

[0030] In the figure: 11, frame; 12, lateral rod; 21, push sleeve; 22, oil cylinder; 23, piston plate; 24, push rod; 25, oil inlet sleeve; 26, sealing rod; 27, transverse rod; 28, constant pressure pipe; 29, through sleeve; 31, fixed frame; 32, movable frame; 33, hydraulic cylinder; 34, shrinkage groove; 35, clamping block; 36, middle hole; 37, adjusting cylinder; 38, middle sleeve; 39, complex Position spring; 210, limit ring; 211, pressure block; 212, follower rod; 213, follower block; 214, internal hole; 215, tension spring; 216, oil inlet groove; 217, oil storage pipe; 218, one-way groove; 219, one-way disk; 220, micro-flow hole; 221, threaded rod; 222, guide rod; 223, sliding sleeve; 224, hexagonal block; 225, spring; 310, protective cover. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0033] In the present invention, unless otherwise specified, directions such as "up" and "down" are generally used with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" are generally used with respect to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0034] See also Figures 1 to 7A bridge cable tension test device includes a fixed frame 11 and a plurality of lateral rods 12 installed on the frame 11; it also includes a pushing mechanism, the pushing mechanism includes a pushing sleeve 21, the upper and lower ends of the pushing sleeve 21 are connected to the oil cylinder 22, and each oil cylinder 22 is respectively connected to a piston disc 23 in a sealed sliding connection, and each piston disc 23 is respectively installed with a plurality of push rods 24, each push rod 24 is respectively connected to the frame 11, and two groups of oil inlet sleeves 25 are installed in the pushing sleeve 21 at equal intervals according to the axis, and each oil inlet sleeve 25 is respectively sealed and slidable. It is connected to a sealing rod 26, and each sealing rod 26 is coaxially installed with a transverse rod 27. The two oil cylinders 22 are connected and installed with a constant pressure pipe 28. The pushing mechanism also includes a through sleeve 29 connected and installed in the two oil cylinders 22, and each oil cylinder 22 is respectively installed with a limit ring 210. A plurality of lateral rods 12 are slidably connected to a pressure block 211. The protruding ends of the two hydraulic cylinders 33 are connected to the pressure block 211. The movable frame 32 is installed on the pressure block 211, and the pressure block 211 is installed with two follower rods 212, which are slidably connected. In the through sleeve 29, two follower blocks 213 are respectively installed on the two follower rods 212, and the two follower blocks 213 are respectively stuck on both sides of the oil cylinder 22. An internal hole 214 is respectively opened in each sealing rod 26, and a tension spring 215 is respectively connected to each internal hole 214, and the other sides of the multiple tension springs 215 are respectively connected to the inner wall of the push sleeve 21. A plurality of oil inlet grooves 216 are opened on one side of each oil inlet sleeve 25 close to the inner wall of the push sleeve 21. An oil storage pipe 217 is connected and installed on the side wall of the constant pressure pipe 28, and the constant pressure pipe 28 has a one-way groove 216. 18. A one-way disc 219 is fitted on the one-way groove 218, and a micro-flow hole 220 is opened on the one-way disc 219. A threaded rod 221 is threadedly connected to the constant pressure tube 28, and the guide rod 222 is slidably connected in the threaded rod 221. A sliding sleeve 223 is coaxially mounted on the lower end of the threaded rod 221, and the sliding sleeve 223 is slidably connected in the constant pressure tube 28. A hexagonal block 224 is mounted on the upper end of the threaded rod 221, and a spring 225 is slidably connected in the guide rod 222. The two ends of the spring 225 respectively abut against the threaded rod 221 and the one-way disc 219.

[0035] When conducting a tension test on the cable, since the cable is very heavy, the cable is first placed in the frame 11, and one end of the cable is first inserted into the push sleeve 21, and then the cable is inserted into the middle hole 36. At this time, the hydraulic cylinder 33 is activated to push the pressure block 211 away from the push sleeve 21. Since the moving frame 32 is equipped with a follower rod 212, the follower rod 212 and the follower block 213 will drive the two cylinders 22 and the push sleeve 21 to move accordingly. Please refer to Figure 3, the push rod 24 is pressed against the frame 11, so the push rod 24 will not move. At this time, the piston disc 23 on the push rod 24 will move toward the limit ring 210 in the oil cylinder 22, and then the hydraulic oil in the oil cylinder 22 and the push sleeve 21 will be pushed into the oil inlet sleeve 25 through the oil inlet groove 216, and then the sealing rod 26 will slide downward and the transverse rod 27 will extend outward. Then, multiple transverse rods 27 will move synchronously toward the axis and press against the surface of the cable. At this time, the transverse rod 27 will approach the frame 11 and shrink along the axis of the axis hole, thereby pulling the cable inward. Please refer to Figure 5 When the hydraulic pressure exceeds the elastic force of the spring 225 as the movement progresses, the connection between the one-way disc 219 and the one-way groove 218 will be released so that the pressure of the hydraulic oil is always at this pressure. At this time, the transverse rod 27 will only apply this pressure, and then will only drive the cable to pull until the movement is completed, at which time the movement process is completed.

[0036] After the moving process is completed, it is necessary to continue to move back and forth before the cable can be pulled further. Since there are micro-holes 220 on the one-way disk 219, the influence of the micro-holes 220 in the moving state is very small. Then when the movement stops, after a while, the hydraulic oil will flow into the oil storage pipe 217 through the micro-holes 220, and then under the action of multiple tension springs 215, the sealing rod 26 and the transverse rod 27 will be pulled to start the return process. As long as the return process starts, the connection with the cable will be released, and then the hydraulic cylinder 33 will be started to move backward. At this time, under the action of the piston disk 23, the hydraulic oil in the oil sleeve 25 and the hydraulic oil in the oil storage pipe 217 will flow into the oil cylinder 22, and then the return process is completed. At this time, one process is completed, and then the cycle continues until the cable is moved to the corresponding position, thereby completing the installation process.

[0037] See also Figure 1 and Figure 7 The clamping mechanism includes a fixed frame 31 and a movable frame 32 fixedly mounted on the frame 11, and two hydraulic cylinders 33 are installed on the frame 11. Two contraction grooves 34 are symmetrically provided on the fixed frame 31 and the movable frame 32, and a clamping block 35 is slidably connected in each contraction groove 34. An intermediate hole 36 is provided on the fixed frame 31 and the movable frame 32, respectively. The clamping mechanism also includes a plurality of adjusting cylinders 37 installed on the fixed frame 31 and the movable frame 32, and the protruding ends of each adjusting cylinder 37 are respectively connected to the clamping block 35. An intermediate sleeve 38 is slidably connected to the two follower rods 212, and return springs 39 are respectively installed at both ends of the intermediate sleeves 38, and the two ends of the two return springs 39 are respectively in contact with the fixed frame 31 and the movable frame 32, and a protective sleeve 310 is installed on the intermediate sleeve 38, and the protective sleeve 310 and the intermediate hole 36 are coaxially arranged.

[0038] When it is necessary to fix the two ends of the cable for testing, first rotate the hexagonal block 224 to release the connection between the one-way disk 219 and the one-way groove 218. At this time, no matter how the oil cylinder 22 moves, the hydraulic oil will only flow into the oil storage pipe 217, so the transverse rod 27 will not be affected. Then start the multiple adjusting cylinders 37 on both sides and then add the two clamping blocks 35 to the cable respectively. The fixed frame 31 and the movable frame 32 fix the cable respectively, and the cable passes through the protective cover 310 to guide and protect it. At this time, start the hydraulic cylinder 33 to drive the movable frame 32 away from the position of the fixed frame 31, and then pull the clamping block 35 outward with the follow-up cable to produce a self-locking effect with the cable. Then a tensile test can be carried out. The pressure generated by the hydraulic cylinder 33 can be used to carry out the testing process. The protective cover 310 is used for protection to avoid the risk of cable breakage, thereby completing the use process.

[0039] In all the schemes mentioned above, the connection between the two parts can be selected according to actual conditions by welding, bolt and nut connection, bolt or screw connection or other well-known connection methods, which will not be described here one by one. In the above, all fixed connections are preferably considered to be welding. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles 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 cable tension testing device, comprising a frame (11) fixedly mounted thereon and a plurality of lateral rods (12) mounted on the frame (11); wherein: The invention also includes a pushing mechanism, wherein the pushing mechanism includes a pushing sleeve (21), the upper and lower ends of the pushing sleeve (21) are connected to the oil cylinder (22), and each of the oil cylinders (22) is sealed and slidably connected to a piston disc (23), and each of the piston discs (23) is respectively installed with a plurality of push rods (24), and each of the push rods (24) is respectively connected to the frame (11), and two groups of oil inlet sleeves (25) are installed in the pushing sleeve (21) at equal intervals along the axis, and each of the oil inlet sleeves (25) is sealed and slidably connected to a sealing rod (26), and each of the sealing rods (26) is respectively installed. A transverse rod (27) is coaxially mounted on each of the two oil cylinders (22), and a constant pressure pipe (28) is connected and mounted in each of the two oil cylinders (22). The pushing mechanism further comprises a through sleeve (29) connected and mounted in the two oil cylinders (22), and a limiting ring (210) is installed in each of the oil cylinders (22). A plurality of the lateral rods (12) are slidably connected to a pressure block (211), and the protruding ends of the two hydraulic cylinders (33) are connected to the pressure block (211). The movable frame (32) is mounted on the pressure block (211), and the pressure block (211) is equipped with two follower rods (212). The movable rod (212) is slidably connected in the through sleeve (29), an internal hole (214) is respectively opened in each of the sealing rods (26), and a tension spring (215) is respectively connected in each of the internal holes (214), and the other sides of the plurality of tension springs (215) are respectively connected to the inner wall of the push sleeve (21), and a plurality of oil inlet grooves (216) are opened on the side of each of the oil inlet sleeves (25) close to the inner wall of the push sleeve (21), an oil storage pipe (217) is connected and installed on the side wall of the constant pressure pipe (28), and the constant pressure pipe (28) is opened with a one-way groove (218), and the one-way groove (218) ) is fitted with a one-way disk (219), and a micro-flow hole (220) is provided on the one-way disk (219); it also includes a clamping mechanism, the clamping mechanism includes a fixed frame (31) and a movable frame (32) fixedly mounted on the frame (11), two hydraulic cylinders (33) are installed on the frame (11), the fixed frame (31) and the movable frame (32) are symmetrically provided with two contraction grooves (34), each of the contraction grooves (34) is slidably connected with a clamping block (35), and the fixed frame (31) and the movable frame (32) are respectively provided with an intermediate hole (36).

2. The bridge cable tension testing device according to claim 1, characterized in that: Two follower blocks (213) are respectively installed on the two follower rods (212), and the two follower blocks (213) are respectively clamped on both sides of the oil cylinder (22).

3. The bridge cable tension testing device according to claim 2, characterized in that: The constant pressure tube (28) is threadedly connected to a threaded rod (221), the guide rod (222) is slidably connected to the threaded rod (221), a sliding sleeve (223) is coaxially mounted on the lower end of the threaded rod (221), and the sliding sleeve (223) is slidably connected to the constant pressure tube (28), and a hexagonal block (224) is mounted on the upper end of the threaded rod (221).

4. The bridge cable tension testing device according to claim 3, characterized in that: A spring (225) is sleeved and slidably connected inside the guide rod (222), and two ends of the spring (225) respectively contact the threaded rod (221) and the one-way disc (219).

5. The bridge cable tension testing device according to claim 4, characterized in that: The clamping mechanism further comprises a plurality of adjustment cylinders (37) mounted on the fixed frame (31) and the movable frame (32), wherein the protruding end of each adjustment cylinder (37) is respectively connected to the clamping block (35).

6. The bridge cable tension testing device according to claim 5, characterized in that: An intermediate sleeve (38) is slidably connected to the two follower rods (212), and return springs (39) are respectively installed at both ends of the intermediate sleeves (38), and the two ends of the return springs (39) respectively contact the fixed frame (31) and the movable frame (32), and a protective sleeve (310) is installed on the intermediate sleeve (38), and the protective sleeve (310) and the intermediate hole (36) are coaxially arranged.

7. A method for testing the tensile strength of bridge cables, using the bridge cable tensile testing device according to claim 6, characterized in that: The following steps are involved: Step 1: Initial cable delivery: When the cable needs to be tested, the cable is first placed in the frame (11) and one end thereof is inserted into the push sleeve (21) and the middle hole (36). After the hydraulic cylinder (33) is started, the entire push system is driven to move by the pressure block (211) and the follower mechanism. At this time, since the push rod (24) is fixed to the frame (11), the piston disc (23) moves in the oil cylinder (22), pushing the hydraulic oil into the oil inlet sleeve (25), causing the sealing rod (26) and the transverse rod (27) to extend outward, thereby grabbing the cable and driving it to move; Step 2: Reciprocating cyclic conveying: After completing one push, the system needs to perform reciprocating motion to continue conveying the cable. When the system stops moving, the hydraulic oil slowly flows into the oil storage pipe (217) through the micro-hole (220). At the same time, under the action of the tension spring (215), the sealing rod (26) and the transverse rod (27) begin to return, temporarily releasing the contact with the cable. When the hydraulic cylinder (33) moves in the reverse direction, the hydraulic oil in the cylinder (22) flows back, completing a reciprocating cycle. This is repeated until the cable reaches the specified position. Step 3 Tensile test process: When the cable is in place, rotate the hexagonal block (224) to stop the transverse rod (27), and then control the clamping block (35) to clamp the two ends of the cable through the adjustment cylinder (37). After the cable passes through the protective cover (310), start the hydraulic cylinder (33) to move the movable frame (32) away from the fixed frame (31). At this time, the clamping block (35) and the cable produce a self-locking effect, and the tensile test begins. During the whole process, the protective cover (310) plays a guiding and safety protection role, effectively preventing the danger that may be caused by the breakage of the cable.

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