Synchronous tensioning equipment for multiple bundles of prestressed tendons

Abstract

The invention relates to the technical field of prestressed tendon tensioning, in particular to synchronous tensioning equipment for multiple bundles of prestressed tendons. The technical problem to be solved by the invention is that when prestressed tendon tensioning equipment in the prior art is used, the tensioning degrees borne by all bundles of prestressed tendons are different. According to the technical scheme, the clamping device comprises a connecting shaft and further comprises a first clamping mechanism and a second clamping mechanism which are arranged on the connecting shaft, and the first clamping mechanism comprises a first slotting plate fixedly arranged on the connecting shaft in a sleeving mode. Through the design of the first clamping mechanism and the second clamping mechanism, the prestressed tendons are tensioned through the second clamping mechanism, so that each bundle of prestressed tendons can reach the same tensioning degree, and after the prestressed tendons reach the enough tensioning degree, the prestressed tendons can be clamped through the first clamping mechanism, so that the prestressed tendons can be clamped through the second clamping mechanism; and then the prestressed tendons are tensioned through the first clamping mechanism, it can be guaranteed that the tension degrees of all the prestressed tendons are the same, and therefore the bearing capacity of the prestressed tendons to the lifted concrete is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of prestressed tendon tensioning technology, and more particularly to a device for synchronous tensioning of multiple prestressed tendons. Background Technology

[0002] As a key material in modern building structures, prestressed steel bars play a crucial role in significantly improving the load-bearing capacity of concrete, effectively enhancing its crack resistance, and strengthening the overall stiffness and stability of the structure. By tensioning the prestressed tendons, the stress state of the concrete can be changed from tension to compression when it is under load, thereby greatly improving the load-bearing capacity of the structure.

[0003] When tensioning prestressing tendons, the tension of each prestressing tendon is different. If the prestressing tendons are tensioned directly through tensioning equipment, the bearing capacity provided by the prestressing tendons to the concrete will be uneven, the strength and bearing capacity of the concrete structure will not meet the standards, and the concrete will be more easily damaged after it is put into use. Summary of the Invention

[0004] In order to overcome the shortcomings of existing prestressing tendon tensioning equipment where each prestressing tendon is subjected to different tensions, this invention provides a multi-bundle prestressing tendon synchronous tensioning device.

[0005] The technical solution of the present invention is: a multi-bundle prestressed tendon synchronous tensioning device, comprising a connecting shaft, and a first clamping mechanism and a second clamping mechanism disposed on the connecting shaft. The first clamping mechanism comprises a first slotted plate fixedly sleeved on the connecting shaft. A plurality of first clamping pieces and second clamping pieces are slidably mounted on the first slotted plate. A pair of sliding grooves are formed on the first clamping pieces. A pair of first vertical rods located in the sliding grooves are fixedly mounted on the second clamping pieces. A first sliding rod is fixedly mounted on the first clamping pieces and slidably mounted through the first slotted plate. A compression spring is disposed between the first sliding rod and the first slotted plate. A rotating ring located on one side of the first slotted plate is rotatably sleeved on the connecting shaft. A torsion ring is fixedly mounted on the rotating ring. A rotating wheel cooperating with the torsion ring is rotatably connected to the first sliding rod. A first handle is fixedly mounted on the rotating ring.

[0006] Furthermore, the first clamping mechanism also includes a plurality of U-shaped frames fixedly mounted on the first slotted plate, and a pair of protruding shafts that cooperate with the U-shaped frames are fixedly mounted on the second clamping plate.

[0007] Furthermore, the first clamping mechanism also includes a plurality of irregularly shaped rods that are elastically slidably mounted through the first slotted plate. The irregularly shaped rods are provided with through slots, and L-shaped telescopic rods are slidably mounted in the through slots. A tension spring is provided between the L-shaped telescopic rods and the through slots. A locking block that cooperates with the L-shaped telescopic rods is fixedly mounted on the second clamping plate.

[0008] Furthermore, a vertical groove is provided on the connecting shaft, and an elastic limiting block is slidably installed in the vertical groove. The inner wall of the rotating ring is provided with a limiting groove that matches the elastic limiting block.

[0009] Furthermore, the second clamping mechanism includes a second slotted plate slidably mounted on the connecting shaft, a return spring being provided between the second slotted plate and the first slotted plate, the telescopic end of the L-shaped telescopic rod being slidably mounted in the second slotted plate, a plurality of third clamping pieces being slidably mounted on the second slotted plate, a Z-shaped telescopic plate being fixedly mounted on the third clamping pieces, a hydraulic rod being mounted on the telescopic end of the Z-shaped telescopic plate, and a pressure sensor being jointly mounted between the hydraulic rod and the second slotted plate.

[0010] Furthermore, the second clamping mechanism also includes a plurality of fourth clamping pieces slidably mounted on the second slotted plate. The fourth clamping pieces have grooves, and a first elastic slider is slidably mounted in the grooves. The first elastic slider works in conjunction with the L-shaped telescopic rod. A pair of second vertical rods are fixedly mounted on the fourth clamping pieces. The second vertical rods are slidably connected to the third clamping pieces through the grooves. The telescopic rod is fixedly mounted between the irregular rod and the fourth clamping pieces.

[0011] Furthermore, the second clamping mechanism also includes a collar rotatably sleeved on the second slotted plate, a second handle fixedly installed on the collar, and a plurality of third slide rods that cooperate with the first elastic slider are elastically slidably installed through the second slotted plate. Rollers are rotatably connected to the third slide rods, and a plurality of extrusion blocks that cooperate with the rollers are fixedly installed inside the collar.

[0012] Furthermore, it also includes multiple arc-shaped strips fixedly installed on the rotating ring, the arc-shaped strips cooperating with the irregularly shaped rod.

[0013] Furthermore, multiple sets of wedge blocks are fixedly installed inside the second slotted plate, and a pair of guide grooves are provided on the fourth clamping plate. A second elastic slider that cooperates with the wedge blocks is slidably installed inside the guide grooves.

[0014] Furthermore, multiple sets of damping strips are fixedly installed inside the second slotted plate, and the damping strips cooperate with the fourth clamping plate.

[0015] The beneficial effects are: 1. The present invention, through the design of the first clamping mechanism and the second clamping mechanism, first tensions the prestressing tendons by the second clamping mechanism, so that each prestressing tendon can reach the same tension. When the prestressing tendons reach sufficient tension, the first clamping mechanism can clamp the prestressing tendons and then tension them again by the first clamping mechanism, which can ensure that the tension of all prestressing tendons is the same, thereby ensuring the load-bearing capacity of the prestressing tendons for lifting concrete.

[0016] 2. The present invention, through the design of the L-shaped telescopic rod, allows the first clamp and the second clamp to remain separated when the L-shaped telescopic rod cooperates with the locking block of the second clamp, so that the prestressing tendon can pass through the first clamp and the second clamp. Through the design of the first elastic slider, the locking block of the second clamp can be released from the restriction, so that the first clamp and the second clamp can quickly clamp the prestressing tendon. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the first clamping mechanism of the present invention; Figure 3 This is a schematic diagram of the installation at the first slide bar of the present invention; Figure 4 This is a schematic diagram of the installation at the first vertical rod of the present invention; Figure 5 This is a schematic diagram of the installation of the elastic limiting block of the present invention; Figure 6 This is a schematic diagram of the structure of the second clamping mechanism of the present invention; Figure 7 This is a schematic diagram of the installation at the first elastic slider of the present invention; Figure 8 This is a schematic diagram of the installation at the second vertical rod of the present invention; Figure 9 This is a schematic diagram of the installation at the arc-shaped strip of the present invention; Figure 10 This is a schematic diagram of the installation of the wedge-shaped block in this invention.

[0018] In the attached drawings, the following labels are used: 1-connecting shaft, 201-first slotted plate, 202-first clamping piece, 203-second clamping piece, 204-first vertical rod, 205-first sliding rod, 206-rotating ring, 207-twisted ring, 208-first handle, 301-U-shaped frame, 302-protruding shaft, 303-irregular rod, 304-L-shaped telescopic rod, 401-elastic limiting block, 402-limiting groove, 501-second slotted plate, 502-third clamping piece, 503-Z-shaped telescopic plate, 601-fourth clamping piece, 602-first elastic slider, 603-second vertical rod, 604-telescopic rod, 701-ring, 702-second handle, 703-third sliding rod, 704-pressing block, 801-arc strip, 901-wedge block, 902-second elastic slider, 1001-damping strip. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0020] Example 1 A multi-strand prestressed tendon synchronous tensioning device, such as Figures 1-4 As shown, the device includes a connecting shaft 1, and a first clamping mechanism and a second clamping mechanism disposed on the connecting shaft 1. The first clamping mechanism and the second clamping mechanism are used to alternately clamp the prestressing tendons. The first clamping mechanism includes a first slotted plate 201 fixedly sleeved on the connecting shaft 1. Six first clamping pieces 202 and second clamping pieces 203 are slidably mounted on the first slotted plate 201. The outer walls of the first clamping pieces 202 and the second clamping pieces 203 are conical. The first clamping pieces 202 and the second clamping pieces 203 are arranged in a circular array corresponding to each other. A pair of sliding grooves are opened on the side of the first clamping piece 202 near the second clamping piece 203. A pair of first vertical rods 204 located in the slide groove are fixedly installed on one side near the first clamping piece 202. A first sliding rod 205 is fixedly installed on the first clamping piece 202 and slides through the first slotted plate 201. A compression spring is provided between the first sliding rod 205 and the first slotted plate 201. The compression spring is sleeved on the first sliding rod 205. A rotating ring 206 located on the left side of the first slotted plate 201 is rotatably sleeved on the left end of the connecting shaft 1. A torsion ring 207 is fixedly installed on the right side of the rotating ring 206. A rotating wheel that cooperates with the torsion ring 207 is rotatably connected to the left end of the first sliding rod 205. A first handle 208 is fixedly installed on the rotating ring 206.

[0021] like Figure 4 As shown, the first clamping mechanism also includes six U-shaped frames 301 fixedly installed on the first slotted plate 201. The six U-shaped frames 301 are arranged in a ring array. A pair of protruding shafts 302 that cooperate with the U-shaped frames 301 are fixedly installed on the outer wall of the second clamping plate 203.

[0022] like Figure 4As shown, the first clamping mechanism also includes a plurality of irregularly shaped rods 303 that are elastically slidably mounted on the first slotted plate 201. A through groove is provided on the right side of the outer wall of the irregularly shaped rod 303. An L-shaped telescopic rod 304 is slidably mounted in the through groove. A tension spring is provided between the L-shaped telescopic rod 304 and the through groove. A locking block that cooperates with the L-shaped telescopic rod 304 is fixedly installed on the side of the outer wall of the second clamping plate 203 near the irregularly shaped rod 303.

[0023] like Figure 5 As shown, a vertical groove is provided on the top left side of the outer wall of the connecting shaft 1, and an elastic limiting block 401 is slidably installed in the vertical groove. A limiting groove 402 matching the elastic limiting block 401 is provided on the inner wall of the rotating ring 206.

[0024] like Figure 6 and Figure 7 As shown, the second clamping mechanism includes a second slotted plate 501 that is slidably mounted on the connecting shaft 1 in the horizontal direction. A return spring sleeved on the connecting shaft 1 is provided between the second slotted plate 501 and the first slotted plate 201. The telescopic end of the L-shaped telescopic rod 304 is slidably mounted in the second slotted plate 501 along the radial direction. Six third clamping pieces 502 arranged in a circular array are slidably mounted on the second slotted plate 501. A Z-shaped telescopic plate 503 is fixedly mounted on the outer wall of the third clamping pieces 502. A hydraulic rod is installed on the left side of the telescopic end of the Z-shaped telescopic plate 503. A pressure sensor is installed between the hydraulic rod and the second slotted plate 501. The pressure sensor is used to control the retraction of the telescopic end of the hydraulic rod.

[0025] like Figures 6-8 As shown, the second clamping mechanism also includes six fourth clamping plates 601 arranged in a circular array and slidably mounted on the second slotted plate 501. The outer wall of the fourth clamping plate 601 is provided with a groove, and a first elastic slider 602 is slidably mounted in the groove. The first elastic slider 602 is used in conjunction with the L-shaped telescopic rod 304. A pair of second vertical rods 603 are fixedly mounted on the side of the fourth clamping plate 601 near the third clamping plate 502. The second vertical rods 603 are slidably connected to the third clamping plate 502 through the groove. The right end of the irregular rod 303 and the corresponding fourth clamping plate 601 are fixedly mounted together with the telescopic rod 604. The elastic force of the return spring is greater than the elastic force of the telescopic rod 604.

[0026] like Figure 6 and Figure 7 As shown, the second clamping mechanism also includes a collar 701 rotatably sleeved on the second slotted plate 501. A second handle 702 is fixedly installed on the outer wall of the collar 701. Six third slide rods 703 that cooperate with the first elastic slider 602 are elastically slidably installed through the second slotted plate 501. Rollers are rotatably connected to the ends of the third slide rods 703. Six pressing blocks 704 that cooperate with the rollers are fixedly installed on the inner wall of the collar 701.

[0027] like Figure 9 As shown, it also includes six arc-shaped strips 801 fixedly installed on the rotating ring 206. The arc-shaped strips 801 cooperate with the irregular rod 303. By pressing the irregular rod 303, the arc-shaped strips 801 can make the third clamping piece 502 and the fourth clamping piece 601 clamp the prestressing tendon.

[0028] like Figure 7 and Figure 10 As shown, six sets of wedge blocks 901 are fixedly installed inside the second slotted plate 501. The six sets of wedge blocks 901 are arranged one-to-one with six fourth clamping pieces 601. Each set consists of two pieces. A pair of guide grooves are provided on the fourth clamping pieces 601. A second elastic slider 902 that cooperates with the wedge blocks 901 is slidably installed in the guide grooves.

[0029] like Figure 7 and Figure 10 As shown, six sets of damping strips 1001 are fixedly installed inside the second slotted plate 501. The damping strips 1001 are located on one side of the wedge block 901 and cooperate with the fourth clamping plate 601.

[0030] Initially, there is a sufficient gap between the first clamping piece 202 and the second clamping piece 203 for the prestressing tendon to pass through. The torsion ring 207 is in contact with the rotating wheel of the first slide rod 205. The compression spring between the first slide rod 205 and the first slotted plate 201 is in a contracted state. The L-shaped telescopic rod 304 is in a contracted state. The tension spring between the L-shaped telescopic rod 304 and the through slot is in an extended state. The elastic limiting block 401 is inserted into the limiting groove 402 to limit the rotating ring 206. The hydraulic rod on the Z-shaped telescopic plate 503 is in a contracted state. There is a gap between the third clamping piece 502 and the fourth clamping piece 601. The first elastic slider 602 abuts against the end of the corresponding third slide rod 703 and is in a contracted state. The right wall of the first elastic slider 602 is in contact with the second slotted plate 501. The inner wall contacts the outer wall of the arc-shaped strip 801, which contacts the outer wall of the corresponding irregular rod 303. The worker inserts the prestressing tendons between each first clamp 202 and second clamp 203, and then between the corresponding third clamp 502 and fourth clamp 601. The connecting shaft 1 is then fixed in the working position, and the worker rotates the collar 701 counterclockwise using the second handle 702. The collar 701 drives the six extrusion blocks 704 to move. The extrusion blocks 704 extrude force against the rollers on the third slide rod 703. The rollers, under pressure, cause the third slide rod 703 to elastically contract and slide. The third slide rod 703 extrudes force against the first elastic slider 602, causing the first elastic slider 602 to elastically contract and slide into the groove of the fourth clamp 601, no longer contacting the inner wall of the second slotted plate 501. When the wall contacts the L-shaped telescopic rod 304, the first elastic slider 602 no longer presses against it. The tension spring contracts, causing the L-shaped telescopic rod 304 to slide towards the side closer to the connecting shaft 1. The telescopic end of the L-shaped telescopic rod 304 slides along the second slotted plate 501. Taking the first clamping piece 202, the second clamping piece 203, the third clamping piece 502, and the fourth clamping piece 601 located on the upper side as an example, the front wall of the fixed end of the L-shaped telescopic rod 304 then contacts the left side wall of the locking block of the second clamping piece 203. The fixed end of the L-shaped telescopic rod 304 limits the second clamping piece 203 through the locking block. At the same time, the first elastic slider 602 no longer contacts the inner wall of the second slotted plate 501, and the first elastic slider 602 no longer limits the third clamping piece 502 through the fourth clamping piece 601 and the second vertical rod 603, thus controlling the movement. The hydraulic rod on the Z-shaped telescopic plate 503 extends, driving the third clamping piece 502 to slide to the right via the Z-shaped telescopic plate 503. The third clamping piece 502, via the second vertical rod 603, drives the fourth clamping piece 601 to slide to the right until it is in contact with the inner wall of the second slotted plate 501. The fourth clamping piece 601 drives the telescopic rod 604 to extend. Then, the first handle 208 rotates the rotating ring 206 counterclockwise. The limiting groove 402 of the rotating ring 206 presses against the elastic limiting block 401. The elastic limiting block 401 elastically contracts and slides under force. The rotating ring 206 drives the twisted ring 207 and the six arc-shaped strips 801 to move. After the twisted ring 207 moves, it no longer contacts the wheel of the first sliding rod 205. Since the second clamping piece 203 is limited at this time, the compression spring remains in a contracted state.There is still a gap between the second clamping piece 203 and the first clamping piece 202. At the same time, the arc-shaped strip 801 presses against the outer wall of its corresponding irregular rod 303. The irregular rod 303, under the force, drives the L-shaped telescopic rod 304 to move closer to the connecting shaft 1 through the tension spring. The telescopic rod 604 then drives the fourth clamping piece 601 to slide closer to the connecting shaft 1. The fourth clamping piece 601 drives the second vertical rod 603 and the second elastic slider 902 to move. The first elastic slider 602 gradually releases its elasticity. Release the sliding mechanism. The second elastic slider 902 is compressed and elastically contracts by the wedge block 901, sliding until the second elastic slider 902 passes the wedge block 901. The fourth clamping piece 601 and the third clamping piece 502 then come into contact. The second elastic slider 902 and the wedge block 901 are in contact, and the wedge block 901 limits the fourth clamping piece 601 through the second elastic slider 902, so that the fourth clamping piece 601 and the third clamping piece 502 cooperate to clamp the prestressing tendon. Release the second handle 702, and the third slide rod 703... The elastic release slide resets and drives the roller to move. The roller presses the compression block 704, and the compression block 704, under force, drives the collar 701 to rotate and reset. The collar 701 drives the second handle 702 to move and reset. Then, the operator drives the rotating ring 206 to rotate clockwise through the first handle 208. The rotating ring 206 drives the twisted ring 207 and the six arc-shaped bars 801 to move. The arc-shaped bars 801 no longer contact the irregular rod 303. When the rotating ring 206 rotates to the initial position, the elastic limit block 401 elastically releases and slides into the limit groove 402. The first handle 208 continues to drive the rotating ring 206 to rotate clockwise. The rotating ring 206 continues to drive the twisted ring 207 and the six arc-shaped bars 801 to move. The limit groove 402 presses the elastic limit block 401 again. The elastic limit block 401 elastically contracts and slides under force, so that the twisted ring 207 no longer contacts the rotating wheel of the first slide rod 205, so that the subsequent compression spring release can drive the first slide rod 205 to slide and reset. ,

[0031] Initially, each prestressing tendon is in a relaxed state, and the tension of each tendon is different. The return spring between the first slotted plate 201 and the second slotted plate 501 is in a released state. After the third clamping plate 502 and the fourth clamping plate 601 clamp the prestressing tendon, the second slotted plate 501 is pushed by the hydraulic equipment. The second slotted plate 501 slides to the right along the connecting shaft 1, and the return spring is stretched under force. The second slotted plate 501 drives all the third clamping plates 502 and the fourth clamping plates 601 within it to move, and drives the extension end of the L-shaped telescopic rod 304 to extend. The fourth clamping plate 601 drives the telescopic rod 604 to extend. The third clamping plates 502 and the fourth clamping plates 601 tension the prestressing tendon. Due to the Z-shaped telescopic plate 503 and the second slotted plate... The hydraulic rod between plates 501 has a relatively large force. Through a pressure sensor and the Z-shaped telescopic plate 503, the hydraulic rod can apply a large tension to the prestressing tendon via the third clamp 502 and the fourth clamp 601. When the prestressing tendon with the maximum tension is taut, it transmits the force to the pressure sensor through the third clamp 502, the Z-shaped telescopic plate 503, and the hydraulic rod. The pressure sensor controls the hydraulic rod to contract, causing the Z-shaped telescopic plate 503 to move. The Z-shaped telescopic plate 503 causes the third clamp 502 to slide to the left relative to the second slotted plate 501. The third clamp 502, through the second vertical rod 603, causes the fourth clamp 601 to slide to the left relative to the second slotted plate 501. The fourth clamp 601 then causes the first elastic slider 602 and the second elastic slider 902 to move. Until the second elastic slider 902 passes the wedge block 901, the first elastic slider 602 is released from its restraint and slides. The right wall of the first elastic slider 602 fits against the inner wall of the second slotted plate 501, thus limiting the fourth clamping piece 601. The fourth clamping piece 601 cannot slide horizontally. At the same time, the first elastic slider 602 presses against the bottom of the telescopic end of the L-shaped telescopic rod 304, causing the L-shaped telescopic rod 304 to slide upward. The tension spring is stretched to its limit, and after sliding, the L-shaped telescopic rod 304 no longer contacts the locking block on the second clamping piece 203. The second clamping piece 203 is released from its restraint and can move. The compression spring releases, causing the first slide rod 205 to slide. The first slide rod 205 causes the rotating wheel on it to move until it contacts the torsion ring 207, and also causes the first clamping piece 203 to move. In the 02 movement, the first clamping piece 202 presses against the first vertical rod 204 through the sliding groove, causing the first vertical rod 204 to drive the second clamping piece 203 to move. The second clamping piece 203 cooperates with the first clamping piece 202 to clamp the prestressing tendon, keeping the prestressing tendon in a tensioned state. At the same time as the first elastic slider 602 releases its sliding motion, the fourth clamping piece 601 comes into contact with the damping strip 1001. The damping strip 1001 applies frictional force to the fourth clamping piece 601. The fourth clamping piece 601 applies force to the irregular rod 303 through the telescopic rod 604. Since the arc-shaped strip 801 is no longer in contact with the irregular rod 303 at this time, the irregular rod 303 slowly releases its elastic sliding motion under force, thereby causing the fourth clamping piece 601 to slowly slide. The L-shaped telescopic rod 304 rises synchronously with the sliding of the irregular rod 303.Before the second clamping piece 203 engages with the first clamping piece 202 to clamp the prestressing tendon, there is still friction between the fourth clamping piece 601 and the prestressing tendon. This prevents the prestressing tendon from loosening before the second clamping piece 203 and the first clamping piece 202 clamp it. After the fourth clamping piece 601 is no longer in contact with the prestressing tendon, the tension of the prestressing tendon is applied to the first clamping piece 202 and the second clamping piece 203, causing the first clamping piece 202 and the second clamping piece 203 to move slightly to the left relative to the first slotted plate 201. Due to the special shape of the first clamping piece 202 and the second clamping piece 203, the first slotted plate 201 presses against the outer wall of the first clamping piece 202 and the second clamping piece 203, increasing the clamping force of the first clamping piece 202 and the second clamping piece 203. Subsequently, the irregular rod 303 continues to slowly and elastically release and slide back to its original position, thereby causing the fourth clamping piece 601 and the second elastic slider 902 to slide back to their original positions. 1. No longer in contact with the damping strip 1001, the first elastic slider 602 is squeezed and elastically contracts and slides back to its original position by the outer wall of the L-shaped telescopic rod 304. At this time, the second slotted plate 501 continues to move to the right under the control of the hydraulic equipment until the remaining first clamping pieces 202 and second clamping pieces 203 repeat the above steps to complete the clamping of the remaining prestressing tendons. The hydraulic equipment is then controlled to contract, and the return spring contracts, causing the second slotted plate 501 to slide back to its original position to the left. At this time, the tension of all prestressing tendons is consistent, thereby ensuring the load-bearing capacity of the prestressing tendons for concrete lifting. Then, the connecting shaft 1 is released from fixation, and the first slotted plate 201 is controlled to move to the right under the control of the hydraulic equipment. The first slotted plate 201 drives all the first clamping pieces 202 and second clamping pieces 203 inside it to move. The first clamping pieces 202 and second clamping pieces 203 cooperate to tension the prestressing tendons. After completing the tensioning of the prestressing tendons, the prestressing tendons are cut.

[0032] After the prestressing tendons are tensioned, the operator rotates the rotating ring 206 counterclockwise using the first handle 208. The rotating ring 206 drives the twisting ring 207 and the six arc-shaped bars 801 to move. The twisting ring 207 presses against the rotating wheels on the six first sliding rods 205. The rotating wheels, under force, drive the first sliding rods 205 to slide back to the right. The compression spring contracts under force, and the first sliding rods 205 drive the first clamping plate 202 to slide back to the right. The first clamping plate 202 presses against the outer wall of the first vertical rod 204 through its groove. This causes the second clamping piece 203 to slide to the right. During this process, the protruding shaft 302 is squeezed by the outer wall of the U-shaped frame 301, causing the second clamping piece 203 to move away from the first clamping piece 202. The second clamping piece 203 drives the first vertical rod 204 to slide along the sliding groove of the first clamping piece 202. Then, the limiting groove 402 of the rotating ring 206 aligns with the elastic limiting block 401. The elastic limiting block 401 elastically releases and slides into the limiting groove 402 to limit the rotating ring 206, thereby completing the reset of the entire device.

[0033] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A multi-beam prestressed tendon synchronous tensioning device comprising a connecting shaft (1), characterized in that: Also include the first clamping mechanism and the second clamping mechanism arranged on the connecting shaft (1), the first clamping mechanism includes the first slot plate (201) fixedly sleeved on the connecting shaft (1), a plurality of first clamping pieces (202) and second clamping pieces (203) are slidably installed on the first slot plate (201), a pair of sliding grooves are formed in the first clamping piece (202), a pair of first vertical rods (204) located in the sliding grooves are fixedly installed on the second clamping piece (203), a first sliding rod (205) is fixedly installed on the first clamping piece (202) and slidably installed on the first slot plate (201), a compression spring is arranged between the first sliding rod (205) and the first slot plate (201), a swivel ring (206) is rotatably sleeved on one side of the first slot plate (201) on the connecting shaft (1), a twist ring (207) is fixedly installed on the swivel ring (206), a rotating wheel matched with the twist ring (207) is rotatably connected to the first sliding rod (205), and a first handle (208) is fixedly installed on the swivel ring (206).

2. The multi-beam pre-stressed tendon synchronous tensioning apparatus according to claim 1, characterized in that: The first clamping mechanism further includes a plurality of U-shaped frames (301) fixedly installed on the first slot plate (201), and a pair of protruding shafts (302) matched with the U-shaped frames (301) are fixedly installed on the second clamping piece (203).

3. The multi-beam pre-stressed tendon synchronous tensioning apparatus according to claim 2, characterized in that: The first clamping mechanism further includes a plurality of special-shaped rods (303) slidably installed on the first slot plate (201), a through groove is formed in the special-shaped rod (303), an L-shaped telescopic rod (304) is slidably installed in the through groove, a tension spring is arranged between the L-shaped telescopic rod (304) and the through groove, and a clamping block matched with the L-shaped telescopic rod (304) is fixedly installed on the second clamping piece (203).

4. The multi-beam pre-stressed tendon synchronous tensioning apparatus according to claim 1, characterized in that: A vertical groove is formed in the connecting shaft (1), and an elastic limiting block (401) is slidably installed in the vertical groove; and a limiting groove (402) matched with the elastic limiting block (401) is formed in the inner wall of the swivel ring (206).

5. The multi-beam pre-stressed tendon synchronous tensioning apparatus according to claim 1, characterized in that: The second clamping mechanism includes a second slot plate (501) slidably installed on the connecting shaft (1), a reset spring is arranged between the second slot plate (501) and the first slot plate (201), a telescopic end of the L-shaped telescopic rod (304) is slidably installed in the second slot plate (501), a plurality of third clamping pieces (502) are slidably installed on the second slot plate (501), a Z-shaped telescopic plate (503) is fixedly installed on the third clamping piece (502), a hydraulic rod is installed on the telescopic end of the Z-shaped telescopic plate (503), and a pressure sensor is jointly installed between the hydraulic rod and the second slot plate (501).

6. A multi-beam pre-stressed tendon synchronous tensioning apparatus according to claim 5, characterized in that: The second clamping mechanism further comprises fourth clamping pieces (601) slidably mounted on the second slotted plate (501), the fourth clamping pieces (601) are provided with grooves, first elastic sliding blocks (602) are slidably mounted in the grooves, the first elastic sliding blocks (602) are used in cooperation with the L-shaped telescopic rods (304), a pair of second vertical rods (603) are fixedly installed on the fourth clamping pieces (601), the second vertical rods (603) are in penetratingly and slidably connected with the third clamping pieces (502), and telescopic rods (604) are fixedly installed between the special-shaped rods (303) and the fourth clamping pieces (601).

7. The multi-beam pre-stressed tendon synchronous tensioning apparatus according to claim 6, characterized in that: The second clamping mechanism further comprises a sleeve ring (701) rotatably sleeved on the second slotted plate (501), the sleeve ring (701) is fixedly provided with a second handle (702), a plurality of third sliding rods (703) matched with the first elastic sliding blocks (602) are elastically and penetratingly and slidably installed on the second slotted plate (501), rollers are rotatably connected to the third sliding rods (703), and a plurality of extrusion blocks (704) matched with the rollers are fixedly installed in the sleeve ring (701).

8. The multi-beam pre-stressed tendon synchronous tensioning apparatus according to claim 1, characterized in that: A plurality of arc-shaped strips (801) are fixedly installed on the rotating ring (206) and matched with the special-shaped rods (303).

9. The multi-beam pre-stressed tendon synchronous tensioning apparatus according to claim 6, characterized in that: A plurality of groups of wedge-shaped blocks (901) are fixedly installed in the second slotted plate (501), a pair of guide grooves are formed in the fourth clamping pieces (601), and second elastic sliding blocks (902) matched with the wedge-shaped blocks (901) are slidably installed in the guide grooves.

10. The multi-beam pre-stressed tendon synchronous tensioning apparatus according to claim 9, characterized in that: A plurality of groups of damping strips (1001) are fixedly installed in the second slotted plate (501) and matched with the fourth clamping pieces (601).

Images