Automatic tensioning and tightening equipment for sleeper prestressed tendons

Abstract

The utility model relates to sleeper prestressed tendon automatic tensioning and tightening equipment which comprises at least one tensioning oil cylinder, a tensioning rod, a tensioning claw and a tensioning inner nut, the tensioning rod is connected with a piston in the tensioning oil cylinder so that the tensioning rod can be driven by the tensioning oil cylinder to move in the axial direction, the front end of the tensioning rod is rotationally connected with the tensioning claw, and the tensioning claw is connected with the tensioning inner nut. The tensioning claw is driven by a motor to rotate, the tensioning inner nut is detachably inserted into the tensioning claw, and one end of the prestressed tendon can penetrate through the tensioning inner nut, the tensioning claw and the tensioning rod and is matched with the anchor plate to be connected with the tensioning rod in a clamped mode. Through the cooperative arrangement of the lifting adjusting mechanism and the position adjusting mechanism, the position of the automatic tensioning and tightening equipment for the sleeper prestressed tendons can be freely adjusted before the automatic tensioning and tightening equipment is used, so that the sleeper prestressed tendons to be tensioned can be aligned with the tensioning oil cylinders to be smoothly inserted; and the convenience of adjustment and use of the automatic tensioning and tightening equipment for the sleeper prestressed tendons is improved.

Description

Technical Field

[0001] The present application relates to the technical field of sleeper prestressed tendon tensioning equipment, and in particular to a sleeper prestressed tendon automatic tensioning and tightening equipment. Background Art

[0002] With the increasing development of railway system transportation, the application of prestressed concrete sleepers has increased dramatically. Sleepers are important load-bearing components of the track system under the action of train loads. They bear various forces from the rails and elastically transmit the forces to the roadbed, which can effectively maintain the track gauge, direction and position. At present, most of the laid sleepers are concrete sleepers. In the sleeper production process, sleeper prestressing is an important factor affecting the sleeper processing quality. The spiral rib steel wire of the prestressed concrete sleeper is affected by various factors during the prestressing process, and there is a non-uniform tensioning phenomenon. The uneven stress distribution caused by this may have an adverse effect on the bearing capacity and service life of the sleeper.

[0003] In the related technology, the utility model patent with publication number CN215038759U proposes an automatic prestressing tensioning device for sleepers. Each tensioning head is integrated with a force sensor and a displacement sensor, which can directly read the prestress value and tensioning elongation value during the tensioning process, providing accurate reference data for prestressing, thereby ensuring the tensioning quality.

[0004] The above-mentioned related technologies have the following defects: the tensioning machine head position of this type of automatic prestressed tensioning device for sleepers is fixed, which makes it inconvenient for the equipment to adapt to the insertion and tensioning of prestressed tendons at different positions of the sleepers, so that the use of this type of automatic prestressed tensioning device for sleepers still has certain inconveniences. Utility Model Content

[0005] In order to improve the problems raised in the above-mentioned background technology, the present application provides an automatic tensioning and tightening device for prestressed tendons of sleepers.

[0006] The present application provides an automatic tensioning and tightening device for prestressed tendons of sleepers, which adopts the following technical solutions:

[0007] An automatic tensioning and tightening device for prestressed tendons of sleepers, comprising at least one tensioning oil cylinder, a tensioning rod, a tensioning claw and a tensioning inner nut. The tensioning rod is connected to the piston in the tensioning oil cylinder, so that the tensioning rod can be driven by the tensioning oil cylinder to move axially. The front end of the tensioning rod is rotatably connected to the tensioning claw, and the tensioning claw is driven to rotate by a motor. The tensioning inner nut is detachably inserted into the tensioning claw. One end of the prestressed tendon can pass through the tensioning inner nut, the tensioning claw and the tensioning rod and is clamped and connected to the tensioning rod in cooperation with an anchor plate. The device further comprises a position adjusting mechanism and a lifting adjusting mechanism. The tensioning oil cylinder is supported and installed above the lifting adjusting mechanism, and the lifting adjusting mechanism is installed above the position adjusting mechanism. The lifting adjusting mechanism adjusts the vertical position state of the tensioning oil cylinder, and the position adjusting mechanism adjusts the horizontal and vertical position states of the tensioning oil cylinder.

[0008] Furthermore, the lifting adjusting mechanism comprises a vehicle platform, a lifting adjusting bracket, at least two groups of first lifting adjusters and at least two groups of second lifting adjusters. The tensioning oil cylinder is installed above the vehicle platform. The lifting adjusting bracket is fixed above the vehicle platform in an arch shape and is located outside the tensioning oil cylinder at the same time. The first lifting adjusters and the second lifting adjusters are respectively installed at the bottom of the vehicle platform and the top of the lifting adjusting bracket.

[0009] Furthermore, the first lifting adjuster comprises a first threaded rod, a first threaded sleeve and a first handwheel. The bottom end of the first threaded rod is rotatably connected to the position adjusting mechanism. The first handwheel is sleeved on the first threaded rod and fixedly connected thereto. The first threaded sleeve is installed at the bottom of the vehicle platform and is threadedly connected to the first threaded rod.

[0010] Furthermore, the second lifting adjuster comprises a second threaded rod, a second threaded sleeve and a second handwheel. The second threaded sleeve is rotatably connected to the top of the lifting adjusting bracket. The second handwheel is fixedly connected to the outside of the second threaded sleeve. The lower end of the second threaded rod is fixedly connected to the tensioning oil cylinder located below it. The upper end of the second threaded rod passes through the second threaded sleeve and is threadedly connected thereto.

[0011] Furthermore, the position adjusting mechanism comprises a base, a transverse vehicle frame, two longitudinal vehicle rails and a longitudinal vehicle frame. At least two first rollers are installed on the transverse vehicle frame. The two first rollers can roll transversely in cooperation with the base. The two longitudinal vehicle rails are fixedly connected to the top of the transverse vehicle frame. At least two second rollers are installed on the longitudinal vehicle frame. The two second rollers can roll longitudinally in cooperation with the two longitudinal vehicle rails respectively. The heights of the left and right sides of the base are greater than the heights of the front and rear sides of the base. The heights of the front and rear sides of the longitudinal vehicle rails are greater than the heights of the left and right sides of the longitudinal vehicle rails.

[0012] Further, the position adjustment mechanism further includes at least one feed oil cylinder bracket and a feed oil cylinder. The feed oil cylinder is installed on the feed oil cylinder bracket, and the output end of the feed oil cylinder is connected between the transverse frame and the longitudinal frame.

[0013] Further, the sleeper prestressed tendon automatic tensioning and tightening device further includes a pipe walking bracket. The pipe walking bracket is arranged outside the position adjustment mechanism and forms an "L" shape rotated by 90 degrees.

[0014] The beneficial technical effects of the present application are as follows: Through the combined setting of the lifting adjustment mechanism and the position adjustment mechanism, the sleeper prestressed tendon automatic tensioning and tightening device can freely adjust the position of the device before use, so that the prestressed tendons of the sleeper to be tensioned can be aligned and smoothly inserted into the tensioning oil cylinder, improving the convenience of adjusting and using the sleeper prestressed tendon automatic tensioning and tightening device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a sleeper prestressed tendon automatic tensioning and tightening device according to an embodiment of the present application;

[0016] Figure 2 is Figure 1 a schematic structural diagram of the sleeper prestressed tendon automatic tensioning and tightening device in another angle in

[0017] Reference numerals: 10, position adjustment mechanism; 11, base; 12, transverse frame; 13, longitudinal track; 14, longitudinal frame; 15, feed oil cylinder bracket; 16, feed oil cylinder; 20, lifting adjustment mechanism; 21, vehicle platform; 22, lifting adjustment bracket; 23, first lifting adjuster; 24, second lifting adjuster; 30, tensioning oil cylinder; 40, tensioning rod; 41, tensioning rod connection block; 42, tensioning sensor; 50, insertion plate; 60, insertion plate driving oil cylinder; 70, tensioning claw; 80, tensioning inner nut; 90, pipe walking bracket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present application belong to the scope of protection of the present application.

[0019] An embodiment of the present application discloses a sleeper prestressed tendon automatic tensioning and tightening device. Refer to Figure 1 and Figure 2, the sleeper prestressed tendon automatic tensioning and tightening equipment may include a position adjustment mechanism 10, a lifting adjustment mechanism 20, a tensioning oil cylinder 30, a tensioning rod 40, a tensioning claw 70, a tensioning inner nut 80, and a pipe walking bracket 90. The tensioning oil cylinder 30 is supported and installed above the lifting adjustment mechanism 20, and the lifting adjustment mechanism 20 is installed above the position adjustment mechanism 10. The lifting adjustment mechanism 20 adjusts the vertical position state of the tensioning oil cylinder 30, and the position adjustment mechanism 10 adjusts the horizontal and vertical position states of the tensioning oil cylinder 30.

[0020] The tensioning rod 40 is connected to the piston in the tensioning oil cylinder 30, so that the tensioning rod 40 can be driven by the tensioning oil cylinder 30 to move axially. The front end of the tensioning rod 40 is rotatably connected to the tensioning claw 70, and the tensioning claw 70 is driven to rotate by a motor. The tensioning inner nut 80 is detachably inserted into the tensioning claw 70. One end of the prestressed tendon can pass through the tensioning inner nut 80, the tensioning claw 70, and the tensioning rod 40 and is clamped and connected to the tensioning rod 40 in cooperation with the anchor plate, so that the tensioning rod can pull the prestressed tendon to complete the tensioning process. After the tensioning process, the tensioning claw 70 can be driven to rotate while driving the tensioning inner nut 80 to rotate at the same time, and the tensioning inner nut 80 is tightened at the end of the prestressed tendon.

[0021] In this embodiment, a tensioning sensor 42 existing in the prior art can also be installed on the tensioning rod 40, and the tensioning force is detected by the tensioning sensor 42. In addition, a tensioning rod connection block 41 is also installed on the tensioning rod 40, which can cooperate with the plug plate 50 driven by the plug plate driving oil cylinder 60 to limit it from the side, so that the tensioning rod 40 can be restricted to move only axially when it moves.

[0022] In this embodiment, the position adjustment mechanism 10 may include a base 11, a transverse frame 12, two longitudinal tracks 13, a longitudinal frame 14, at least one feed oil cylinder bracket 15, and a feed oil cylinder 16. At least two first rollers are installed on the transverse frame 12. The two first rollers can roll horizontally in cooperation with the base 11. The heights of the left and right sides of the base 11 are greater than the heights of the front and rear sides of the base 11, so that the transverse frame 12 can be transversely adjusted in position within a limited movement range. The two longitudinal tracks 13 are fixedly connected to the top of the transverse frame 12. At least two second rollers are installed on the longitudinal frame 14. The two second rollers can roll longitudinally in cooperation with the two longitudinal tracks 13 respectively. The heights of the front and rear sides of the longitudinal tracks 13 are greater than the heights of the left and right sides of the longitudinal tracks 13, so that the longitudinal frame 14 can be longitudinally adjusted in position within a limited movement range. With the cooperation of the transverse frame 12 and the longitudinal frame 14, the lifting adjustment mechanism 20 and the tensioning oil cylinder 30 provided above the two can be driven to adjust their positions. The position adjustment mechanism 10 further includes at least one feed oil cylinder bracket 15 and a feed oil cylinder 16. The feed oil cylinder 16 is installed on the feed oil cylinder bracket 15, and the output end of the feed oil cylinder 16 is connected to the transverse frame 12 or the longitudinal frame 14, so that the transverse frame 12 or the longitudinal frame 14 is driven to automatically adjust its position.

[0023] In this embodiment, the lifting adjustment mechanism 20 includes a vehicle platform 21, a lifting adjustment bracket 22, at least two groups of first lifting adjusters 23, and at least two groups of second lifting adjusters 24. The tensioning oil cylinder 30 is installed above the vehicle platform 21. The lifting adjustment bracket 22 is fixed above the vehicle platform 21 in an arched shape and is located outside the tensioning oil cylinder 30 at the same time. The first lifting adjusters 23 and the second lifting adjusters 24 are installed at the bottom of the vehicle platform 21 and the top of the lifting adjustment bracket 22 respectively.

[0024] The first lifting adjuster 23 may include a first threaded rod, a first threaded sleeve, and a first handwheel. The bottom end of the first threaded rod is rotatably connected to the longitudinal frame 14 in the position adjustment mechanism 10. The first handwheel is sleeved on the first threaded rod and fixedly connected thereto. The first threaded sleeve is installed at the bottom of the vehicle platform 21 and is threadedly connected to the first threaded rod. When the first handwheel is rotated, the first screw rod can be driven to rotate accordingly. By using the thread fit between the first threaded sleeve and the first screw rod and the fact that the vehicle platform 21 is restricted from rotating by the two groups of first lifting adjusters 23, the vehicle platform 21 can move axially along the first threaded rod.

[0025] The second lifting regulator 24 may include a second threaded rod, a second threaded sleeve, and a second handwheel. The second threaded sleeve is rotatably connected to the top of the lifting adjustment bracket 22. The second handwheel is fixedly connected to the outside of the second threaded sleeve. The lower end of the second threaded rod is fixedly connected to the tensioning oil cylinder 30 located below it. The upper end of the second threaded rod passes through the second threaded sleeve and is threadedly connected thereto. Similar to the principle of the first lifting regulator 23, the second lifting regulator 24 can adjust the height position of the tensioning oil cylinder 30 on the vehicle platform 21.

[0026] In this embodiment, the pipe running bracket 90 is arranged outside the position adjustment mechanism 10, and the pipe running bracket 90 forms an "L" shape rotated by ninety degrees. The oil pipes and wires required for driving the equipment can be installed on the inner side of the pipe running bracket 90.

[0027] The system of the present invention may further include a control system for controlling the operations of the above-mentioned motor and oil cylinder to perform automatic operations of equipment position adjustment and sleeper prestressed tendon tensioning and tightening. It should be understood that there is no particular limitation on this control system, and it can be implemented by control technologies in the prior art, which will not be elaborated here.

[0028] The above are all the preferred embodiments of this application. The protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. An automatic tensioning and tightening device for prestressed tendons of a sleeper, comprising at least one tensioning cylinder (30), a tensioning rod (40), a tensioning claw (70) and a tensioning inner nut (80), wherein the tensioning rod (40) is connected to a piston in the tensioning cylinder (30) so that the tensioning rod (40) can be driven by the tensioning cylinder (30) to move axially, the front end of the tensioning rod (40) is rotationally connected to the tensioning claw (70), and the tensioning claw (70) is driven to rotate by a motor, the tensioning inner nut (80) can be detachably inserted into the tensioning claw (70), one end of the prestressed tendon can pass through the tensioning inner nut (80), the tensioning claw (70) and the tensioning rod (40) and be clamped and connected to the tensioning rod (40) in cooperation with an anchor plate, and characterized in that: It also includes a position adjustment mechanism (10) and a lifting adjustment mechanism (20), wherein the tensioning cylinder (30) is supported and installed above the lifting adjustment mechanism (20), and the lifting adjustment mechanism (20) is installed above the position adjustment mechanism (10). The lifting adjustment mechanism (20) adjusts the vertical position state of the tensioning cylinder (30), and the position adjustment mechanism (10) adjusts the lateral and longitudinal position states of the tensioning cylinder (30).

2. The automatic tensioning and tightening device for prestressed tendons of sleepers according to claim 1 is characterized in that: The lifting adjustment mechanism (20) comprises a platform (21), a lifting adjustment bracket (22), at least two groups of first lifting adjusters (23) and at least two groups of second lifting adjusters (24); the tensioning cylinder (30) is installed above the platform (21); the lifting adjustment bracket (22) is fixed in an arched shape above the platform (21) and is located outside the tensioning cylinder (30); the first lifting adjuster (23) and the second lifting adjuster (24) are installed at the bottom of the platform (21) and the top of the lifting adjustment bracket (22), respectively.

3. The automatic tensioning and tightening device for prestressed tendons of sleepers according to claim 2 is characterized in that: The first lifting regulator (23) comprises a first threaded rod, a first threaded sleeve and a first hand wheel, the bottom end of the first threaded rod is rotatably connected to the position adjustment mechanism (10), the first hand wheel is sleeved on the first threaded rod and fixedly connected thereto, and the first threaded sleeve is installed at the bottom of the platform (21) and is threadedly connected to the first threaded rod.

4. The automatic tensioning and tightening device for prestressed tendons of sleepers according to claim 2 is characterized in that: The second lifting and lowering adjuster (24) comprises a second threaded rod, a second threaded sleeve and a second hand wheel, the second threaded sleeve being rotatably connected to the top of the lifting and lowering adjustment bracket (22), the second hand wheel being fixedly connected to the outside of the second threaded sleeve, the lower end of the second threaded rod being fixedly connected to a tensioning cylinder (30) located below the second threaded rod, and the upper end of the second threaded rod passing through the second threaded sleeve and being threadedly connected thereto.

5. The automatic tensioning and tightening device for prestressed tendons of sleepers according to any one of claims 1 to 4, characterized in that: The position adjustment mechanism (10) comprises a base (11), a transverse frame (12), two longitudinal rails (13) and a longitudinal frame (14); at least two first rollers are mounted on the transverse frame (12); the two first rollers can roll in the transverse direction in cooperation with the base (11); the two longitudinal rails (13) are fixedly connected to the top of the transverse frame (12); at least two second rollers are mounted on the longitudinal frame (14); the two second rollers can roll in the longitudinal direction in cooperation with the two longitudinal rails (13) respectively.

6. The automatic tensioning and tightening device for prestressed tendons of sleepers according to claim 5, characterized in that: The heights of the left and right sides of the base (11) are both greater than the heights of the front and rear sides of the base (11), and the heights of the front and rear sides of the longitudinal vehicle rail (13) are both greater than the heights of the left and right sides.

7. The automatic tensioning and tightening device for prestressed tendons of sleepers according to claim 5, characterized in that: The position adjustment mechanism (10) further comprises at least one feed cylinder bracket (15) and a feed cylinder (16); the feed cylinder (16) is mounted on the feed cylinder bracket (15), and an output end of the feed cylinder (16) is connected to the transverse frame (12) or the longitudinal frame (14).

8. The automatic tensioning and tightening device for prestressed tendons of sleepers according to claim 7, characterized in that: It also includes a pipe running bracket (90), which is arranged outside the position adjustment mechanism (10), and the pipe running bracket (90) forms an "L" shape rotated by ninety degrees.

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