Tensioning device for steel strand

Abstract

The utility model discloses a tensioning device for a steel strand, which belongs to the technical field of steel strand tensioning and comprises an oil pump body, a motor, a control valve, an adjusting mechanism and a dragging mechanism, the motor is fixedly arranged on the oil pump body, the adjusting mechanism and the dragging mechanism are both arranged on the oil pump body, and the adjusting mechanism is connected with the control valve; the adjusting mechanism comprises a supporting cylinder, a movable plate, a lead screw, a threaded sleeve, a bevel gear ring, a bevel gear, a screw rod, a fixing plate, a hand wheel and a U-shaped plate. The supporting cylinder is fixedly arranged on the oil pump body. A hand wheel is arranged, the hand wheel is rotated, a bevel gear can be driven to rotate through a screw rod, then a bevel gear ring can be driven to rotate, a threaded sleeve can rotate along with the bevel gear ring, a lead screw can be driven to move up and down, the lead screw can drive a U-shaped plate and a movable plate on the U-shaped plate to move up and down, and then a control valve can be driven to move up and down; the control valve can be moved to a proper height, an operator can be prevented from bending down for operation for a long time, and convenience is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel strand tensioning, and in particular relates to a tensioning device for steel strands. Background Art

[0002] The steel strand is a steel product composed of multiple steel wires twisted together. It is often used on a cable-stayed bridge to support and fix the bridge body. When in use, the steel strand needs to be kept tight. Therefore, a tensioning device needs to be used to tension the steel strand during construction. The commonly used steel strand tensioning device consists of an oil pump and a jack. The jack is put on the steel strand and the oil pump is used to control the extension and retraction of the jack. The jack can tension the steel strand. During the tensioning process, a special person needs to be on guard near the oil pump so that the oil supply and return of the oil pump can be controlled in time. For example, the prior art represented by a prestressed tensioning oil pump (publication number CN 211975757 U) in the comparative document has a fixed height of the control valve thereon and cannot be adjusted. If the height of the control valve is low, the operator needs to bend over for a long time when operating the control valve, which is inconvenient to control the control valve on the oil pump.

[0003] In summary, the utility model solves the existing problems by designing a tensioning device for steel strands. Utility Model Content

[0004] In order to solve the problem that the height of the control valve is fixed and cannot be adjusted, which makes it inconvenient to control the control valve on the oil pump, the purpose of the utility model is to provide a tensioning device for steel strands to solve the above-mentioned problems.

[0005] To achieve the above object, the utility model provides the following technical solutions: a tensioning device for a steel strand, comprising an oil pump body, a motor, a control valve, an adjustment mechanism and a drag mechanism, wherein the motor is fixedly arranged on the oil pump body, the adjustment mechanism and the drag mechanism are both arranged on the oil pump body, and the adjustment mechanism is connected to the control valve;

[0006] The adjusting mechanism comprises a supporting cylinder, a movable plate, a screw, a threaded sleeve, a bevel gear ring, a bevel gear, a screw, a fixed plate, a handwheel and a U-shaped plate. The supporting cylinder is fixedly arranged on the oil pump body, the fixed plate is fixedly arranged in the supporting cylinder, the screw and the U-shaped plate are both slidably arranged in the supporting cylinder, one end of the screw is fixedly connected to the U-shaped plate, the screw is located inside the U-shaped plate, the threaded sleeve is threadedly sleeved on the threaded sleeve, the fixed plate is rotatably sleeved on the threaded sleeve, the bevel gear ring is fixedly sleeved on the threaded sleeve, the screw is rotatably arranged in the supporting cylinder, the bevel gear is fixedly arranged at one end of the screw, the bevel gear is meshed with the bevel gear ring, the end of the screw away from the bevel gear rotates through the outer wall surface of the supporting cylinder and is fixedly connected to the handwheel, one end of the U-shaped plate slides through one end of the supporting cylinder and is fixedly connected to the movable plate, and the control valve is fixedly arranged on the movable plate.

[0007] As a preferred solution of the utility model, a sliding rod is slidably arranged in the support tube, a ball screw sleeve is slidably sleeved on the sliding rod, and the fixing plate is fixedly sleeved on the ball screw sleeve.

[0008] As a preferred solution of the utility model, a limiting cylinder is fixedly arranged in the support cylinder, and the screw rod rotates and slides through the limiting cylinder.

[0009] As a preferred solution of the utility model, a through hole is provided on the fixing plate, and the U-shaped plate slides through the through hole.

[0010] As a preferred solution of the utility model, a plurality of limit blocks are slidably arranged in the support tube, the plurality of limit blocks are all located directly below the fixed plate, the plurality of limit blocks are all fixedly connected to the U-shaped plate, and the distance between the plurality of limit blocks is greater than the width of the through hole.

[0011] As a preferred solution of the utility model, the dragging mechanism includes two fixed blocks, a connecting rod and a T-shaped pull rod. The two fixed blocks are fixedly arranged on the oil pump body, the connecting rod is rotatably inserted into the two fixed blocks, the T-shaped pull rod is fixedly arranged on the connecting rod, and the T-shaped pull rod is located between the two fixed blocks.

[0012] As a preferred solution of the utility model, two return springs are fixedly provided on the oil pump body, a connecting piece is fixedly provided on the T-shaped pull rod, and one end of the two return springs away from the oil pump body is fixedly connected to the connecting piece.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The tensioning device for steel strands is provided with a hand wheel. Turning the hand wheel can drive the bevel gear to rotate through the screw rod, and then drive the bevel gear ring to rotate, so that the threaded sleeve can follow the rotation of the bevel gear ring, and then drive the screw rod to move up and down, so that the screw rod can drive the U-shaped plate and the movable plate thereon to move up and down, and then drive the control valve to move up and down, so that the control valve can be moved to a suitable height, which can avoid the operator bending over for a long time to operate, and improve convenience;

[0015] This tensioning device for steel strands is provided with a T-shaped pull rod. By pulling the T-shaped pull rod, it can rotate on the fixed block through the connecting rod, and then the oil pump body can be pulled to move by the T-shaped pull rod, so that the oil pump body can be moved to the working area. The reset spring on the oil pump body can drive the T-shaped pull rod to reset, so that the T-shaped pull rod can always remain in a vertical state, reducing its occupation of space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of A in the utility model;

[0018] Figure 3 It is a structural schematic diagram of the U-shaped plate in the utility model;

[0019] Figure 4 It is a structural schematic diagram of the fixing plate in the utility model;

[0020] Figure 5 It is a structural schematic diagram of the bevel gear in the utility model.

[0021] In the figure: 1. oil pump body; 2. motor; 3. control valve; 4. adjusting mechanism; 401. support cylinder; 402. moving plate; 403. screw rod; 404. threaded sleeve; 405. bevel gear ring; 406. bevel gear; 407. screw rod; 408. fixed plate; 409. hand wheel; 4010. U-shaped plate; 5. drag mechanism; 501. fixed block; 502. connecting rod; 503. T-shaped pull rod; 6. sliding rod; 7. ball screw sleeve; 8. limit cylinder; 9. through hole; 10. limit block; 11. reset spring; 12. connecting piece. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] Example: See Figure 1-5 The utility model provides a tensioning device for a steel strand, comprising an oil pump body 1, a motor 2, a control valve 3, an adjustment mechanism 4 and a drag mechanism 5, wherein the motor 2 is fixedly arranged on the oil pump body 1, the adjustment mechanism 4 and the drag mechanism 5 are both arranged on the oil pump body 1, and the adjustment mechanism 4 is connected to the control valve 3;

[0024] In this embodiment, reference Figure 1 , Figure 3-5 The adjusting mechanism 4 includes a supporting cylinder 401, a movable plate 402, a screw 403, a threaded sleeve 404, a bevel gear ring 405, a bevel gear 406, a screw 407, a fixed plate 408, a hand wheel 409 and a U-shaped plate 4010. The supporting cylinder 401 is fixedly arranged on the oil pump body 1, the fixed plate 408 is fixedly arranged in the supporting cylinder 401, the screw 403 and the U-shaped plate 4010 are both slidably arranged in the supporting cylinder 401, one end of the screw 403 is fixedly connected to the U-shaped plate 4010, the screw 403 is located inside the U-shaped plate 4010, the threaded sleeve 404 is threadedly sleeved on the threaded sleeve 404, the fixed plate 408 is rotatably sleeved on the threaded sleeve 404, the bevel gear ring 405 is fixedly sleeved on the threaded sleeve 404, the screw 407 is rotatably arranged in the supporting cylinder 401, and the bevel gear 406 is fixedly arranged at one end of the screw 407. The bevel gear 406 is meshed with the bevel gear ring 405, and one end of the screw rod 407 away from the bevel gear 406 rotates through the outer wall surface of the support tube 401 and is fixedly connected to the hand wheel 409, and one end of the U-shaped plate 4010 slides through one end of the support tube 401 and is fixedly connected to the movable plate 402, and the control valve 3 is fixedly arranged on the movable plate 402. Rotating the hand wheel 409 can drive the screw rod 407 to rotate, and then the screw rod 407 can drive the bevel gear 406 to rotate, so that the bevel gear 406 can drive the bevel gear ring 405 to rotate, and then the bevel gear ring 405 can drive the threaded sleeve 404 to rotate, and the threaded sleeve 404 can drive the screw rod 403 to move up and down, so that the screw rod 403 can push the U-shaped plate 4010 to move up and down, and then can drive the movable plate 402 to move up and down, and can adjust the height of the control valve 3 on the movable plate 402;

[0025] Among them, a slide rod 6 is also slidably arranged in the support cylinder 401, and a ball screw sleeve 7 is also slidably sleeved on the slide rod 6. The fixed plate 408 is fixedly sleeved on the ball screw sleeve 7. When the U-shaped plate 4010 moves up and down, it can drive the slide rod 6 to move up and down, thereby enabling the slide rod 6 to move up and down on the ball screw sleeve 7. The cooperation between the ball screw sleeve 7 and the screw rod 403 can play a stabilizing role, preventing the U-shaped plate 4010 from shaking, thereby preventing the control valve 3 from shaking.

[0026] Among them, a limiting cylinder 8 is fixedly arranged in the support cylinder 401, and the screw rod 407 rotates and slides through the limiting cylinder 8. The contact distance between the limiting cylinder 8 and the screw rod 407 is relatively long, which can prevent the screw rod 407 from shaking and improve stability;

[0027] In this example, see Figure 4-5 A through hole 9 is provided on the fixing plate 408, and the U-shaped plate 4010 slides through the through hole 9. One end of the U-shaped plate 4010 can pass through the through hole 9 and move to the bottom of the fixing plate 408, so that the U-shaped plate 4010 can be retracted to the inside of the support tube 401, which can increase the moving distance of the U-shaped plate 4010, and further increase the adjustment distance of the control valve 3. When one end of the U-shaped plate 4010 is located outside the support tube 401, the U-shaped plate 4010 can protect the screw rod 403 to prevent the screw rod 403 from being affected;

[0028] Among them, a plurality of limit blocks 10 are also slidably arranged in the support tube 401, and the plurality of limit blocks 10 are all located directly below the fixed plate 408, and the plurality of limit blocks 10 are all fixedly connected to the U-shaped plate 4010, and the distance between the plurality of limit blocks 10 is greater than the width of the through hole 9. When the U-shaped plate 4010 moves, it can drive the limit blocks 10 to move, so that the limit blocks 10 can approach the fixed plate 408. Since the distance between the plurality of limit blocks 10 is greater than the width of the through hole 9, the limit blocks 10 cannot move to the top of the fixed plate 408, so that the limit blocks 10 can limit the U-shaped plate 4010, thereby preventing the U-shaped plate 4010 from detaching from the support tube 401, thereby improving safety.

[0029] In this example, see Figure 1-2 The drag mechanism 5 includes two fixed blocks 501, a connecting rod 502 and a T-shaped pull rod 503. The two fixed blocks 501 are fixedly arranged on the oil pump body 1. The connecting rod 502 is rotatably inserted into the two fixed blocks 501. The T-shaped pull rod 503 is fixedly arranged on the connecting rod 502. The T-shaped pull rod 503 is located between the two fixed blocks 501. The T-shaped pull rod 503 is pulled so that the T-shaped pull rod 503 can rotate on the oil pump body 1 with the connecting rod 502 as the axis. The T-shaped pull rod 503 is continuously pulled, and the oil pump body 1 can be pulled to move through the T-shaped pull rod 503, so as to facilitate the movement of the oil pump body 1.

[0030] Among them, two return springs 11 are fixedly arranged on the oil pump body 1, and a connecting piece 12 is fixedly arranged on the T-shaped pull rod 503. The ends of the two return springs 11 away from the oil pump body 1 are fixedly connected to the connecting piece 12. When the T-shaped pull rod 503 rotates, the return spring 11 can be stretched through the connecting piece 12, so that the return spring 11 accumulates force and stretches. After the T-shaped pull rod 503 is released, the return spring 11 elastically resets, which can pull the connecting piece 12 to move, and then drive the T-shaped pull rod 503 to rotate and reset, so that the T-shaped pull rod 503 is in a vertical state, which is convenient for pulling the T-shaped pull rod 503.

[0031] Based on the above conditions, the workflow designed using this solution is as follows:

[0032] When in use, pull the T-shaped pull rod 503 to make it rotate, and continue to pull the T-shaped pull rod 503 to pull the oil pump body 1 to move, loosen the T-shaped pull rod 503, and the reset spring 11 can elastically reset and drive the connecting plate 12 to rotate, and then drive the T-shaped pull rod 503 to reset, and then turn the hand wheel 409 to drive the screw 407 to rotate, so that the screw 407 can drive the bevel gear 406 to rotate, and then drive the bevel gear ring 405 to rotate, so that the bevel gear ring 405 can drive the threaded sleeve 404 to rotate, and then drive the screw rod 403 to move up and down, so that the screw rod 403 can drive the U-shaped plate 4010 and the movable plate 402 thereon to move up and down, and then drive the control valve 3 to move up and down to a suitable height, connect the jack to the control valve 3, and rotate the control valve 3 to control the extension and retraction of the jack.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tensioning device for a steel strand, characterized in that: The oil pump comprises an oil pump body (1), a motor (2), a control valve (3), an adjustment mechanism (4) and a drag mechanism (5), wherein the motor (2) is fixedly arranged on the oil pump body (1), the adjustment mechanism (4) and the drag mechanism (5) are both arranged on the oil pump body (1), and the adjustment mechanism (4) is connected to the control valve (3); The adjusting mechanism (4) comprises a supporting cylinder (401), a movable plate (402), a screw (403), a threaded sleeve (404), a bevel gear ring (405), a bevel gear (406), a screw (407), a fixed plate (408), a hand wheel (409) and a U-shaped plate (4010); the supporting cylinder (401) is fixedly arranged on the oil pump body (1); the fixed plate (408) is fixedly arranged in the supporting cylinder (401); the screw (403) and the U-shaped plate (4010) are both slidably arranged in the supporting cylinder (401); one end of the screw (403) is fixedly connected to the U-shaped plate (4010); the screw (403) is located inside the U-shaped plate (4010); the threaded sleeve (404) is threadedly sleeved on the threaded sleeve (404); The screw (407) is rotatably mounted on the threaded sleeve (404), the bevel gear ring (405) is fixedly mounted on the threaded sleeve (404), the screw rod (407) is rotatably mounted in the support tube (401), the bevel gear (406) is fixedly mounted on one end of the screw rod (407), the bevel gear (406) is meshed with the bevel gear ring (405), one end of the screw rod (407) away from the bevel gear (406) rotates through the outer wall surface of the support tube (401) and is fixedly connected to the hand wheel (409), one end of the U-shaped plate (4010) slides through one end of the support tube (401) and is fixedly connected to the movable plate (402), and the control valve (3) is fixedly mounted on the movable plate (402).

2. A tensioning device for a steel strand according to claim 1, characterized in that: A sliding rod (6) is also slidably arranged in the support tube (401), a ball screw sleeve (7) is also slidably sleeved on the sliding rod (6), and the fixing plate (408) is fixedly sleeved on the ball screw sleeve (7).

3. A tensioning device for a steel strand according to claim 1, characterized in that: A limiting cylinder (8) is fixedly disposed inside the support cylinder (401), and the screw rod (407) rotates and slides through the limiting cylinder (8).

4. A tensioning device for a steel strand according to claim 1, characterized in that: The fixing plate (408) is provided with a through hole (9), and the U-shaped plate (4010) slides through the through hole (9).

5. A tensioning device for a steel strand according to claim 4, characterized in that: A plurality of limit blocks (10) are also slidably arranged in the support tube (401), the plurality of limit blocks (10) are all located directly below the fixed plate (408), the plurality of limit blocks (10) are all fixedly connected to the U-shaped plate (4010), and the distance between the plurality of limit blocks (10) is greater than the width of the through hole (9).

6. A tensioning device for a steel strand according to claim 1, characterized in that: The drag mechanism (5) comprises two fixed blocks (501), a connecting rod (502) and a T-shaped pull rod (503); the two fixed blocks (501) are fixedly arranged on the oil pump body (1); the connecting rod (502) is rotatably plugged into the two fixed blocks (501); the T-shaped pull rod (503) is fixedly arranged on the connecting rod (502); and the T-shaped pull rod (503) is located between the two fixed blocks (501).

7. A tensioning device for a steel strand according to claim 6, characterized in that: Two return springs (11) are fixedly arranged on the oil pump body (1), a connecting piece (12) is fixedly arranged on the T-shaped pull rod (503), and ends of the two return springs (11) away from the oil pump body (1) are fixedly connected to the connecting piece (12).

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