An overall tension release device for a steel strand bundle

Abstract

The present disclosure belongs to the field of strand relaxation, and discloses an overall strand relaxation device, including a limiting mechanism. The limiting mechanism includes a first circular ring plate, on which a sleeve is fixedly installed. The first circular ring plate and the sleeve are coaxially arranged. The inner diameter of the sleeve is smaller than that of the first circular ring plate, and both ends of the sleeve communicate with the outside. A first circular plate arranged coaxially is provided inside the sleeve. The circumferential side of the first circular plate fits with the inner wall of the sleeve. A plurality of first circular through holes evenly distributed are formed on the first circular plate, and a strong magnetic ring is pasted in the first circular through hole through metal glue. A plurality of evenly distributed ear plates are fixedly connected to the circumferential side of the first circular plate. A plurality of evenly distributed chutes are formed on the side wall of the sleeve. A plurality of evenly distributed rotating motors are fixedly installed on the first circular ring plate; by rotating the first handle and the second handle to control the jacking and loosening of the clamping piece, the close contact between the worker's body and the strand bundle during the relaxation and removal of the clamping piece is avoided, making the relaxation process more convenient and safe.

Description

Technical Field

[0001] The present disclosure belongs to the field of strand relaxation, and particularly relates to an overall strand relaxation device for a strand bundle. Background Art

[0002] With the continuous development of modern technology, industries such as bridge construction have also developed rapidly. Strand is a commonly used material in industries such as bridge construction. Strand usually refers to being used for load-bearing cables, guy wires, strengthening cores, etc., and can also be used as the ground wire for overhead power transmission, the barrier cables on both sides of the road, or the structural cables in building structures. During the use of strand, whether it is tensioned by the pre-tensioning method or the post-tensioning method, after the tensioning is completed, strand relaxation treatment is required. In the traditional strand relaxation process, most of the time, the wedge grips are manually taken out. Especially when relaxing a multi-strand bundle, the operation is extremely inconvenient and there are relatively large safety hazards. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the purpose of the present disclosure is to provide an overall strand relaxation device for a strand bundle, which solves the inconvenience of manually taking out the wedge grips in the prior art and makes the relaxation process more convenient and safe.

[0004] The purpose of the present disclosure can be achieved by the following technical solutions:

[0005] An overall strand relaxation device for a strand bundle includes a limiting mechanism. The limiting mechanism includes a first circular ring plate. A sleeve is fixedly installed on the first circular ring plate. The first circular ring plate and the sleeve are coaxially arranged. The inner diameter of the sleeve is smaller than the inner diameter of the first circular ring plate. Both ends of the sleeve communicate with the outside. A first circular plate coaxially arranged is provided inside the sleeve. The circumferential side of the first circular plate fits with the inner wall of the sleeve. A plurality of first circular through holes evenly distributed are provided on the first circular plate. Strong magnetic rings are pasted in the first circular through holes through metal glue. A plurality of evenly distributed ear plates are fixedly connected to the circumferential side of the first circular plate. A plurality of evenly distributed sliding grooves are provided on the side wall of the sleeve. The sliding grooves correspond to the positions of the ear plates. The ear plates pass through the sliding grooves and can slide up and down along the first slide. A plurality of evenly distributed rotating motors are fixedly installed on the first circular ring plate. The positions of the rotating motors correspond to the positions of the ear plates one by one. Threaded rods are provided at the output ends of the rotating motors. The threaded rods pass through the ear plates and are threadedly connected to the ear plates. A second circular ring plate fixedly connected is sleeved on the upper end of the sleeve. A plurality of evenly distributed first telescopic cylinders are provided on the second circular ring plate. The bottom of the first telescopic cylinder is fixedly connected to the upper end face of the second circular ring plate. The telescopic rod of the first telescopic cylinder is fixedly connected to a third circular ring plate. The third circular ring plate is connected to a first clamping mechanism.

[0006] The first fixture mechanism includes a first anchor plate. The outer wall of the first anchor plate is fixedly connected to the inner wall of the third circular ring plate. A plurality of first anchor holes are evenly distributed on the first anchor plate. The positions and numbers of the first anchor holes are the same as those of the first circular through holes. First clamping pieces are placed in each of the first anchor holes. There is a second circular plate above the first anchor plate. The first anchor plate and the second circular plate are fixedly connected by a plurality of first support columns. A plurality of second circular through holes are provided on the second circular plate. The second circular through holes correspond to the first anchor holes one by one.

[0007] A first top and loosen unit is provided on the second circular plate. The first top and loosen unit includes two first rotating wheels. The two first rotating wheels are placed in parallel and symmetrically. The first rotating wheels are vertically placed on the second circular plate. First handles are fixedly installed on the first rotating wheels. The other ends of the first handles face away from the central axis of the second circular plate. First rotating shafts are rotatably connected to the first rotating wheels. The central axis of the first rotating shaft is not collinear with the central axis of the first rotating wheel. The two ends of the first rotating shaft penetrate through the first rotating wheel. Both ends of the first rotating shaft are fixedly connected with first transmission rods. The first transmission rods are vertically upward. The upper end of the first transmission rod is fixedly connected with a fourth circular ring plate. A plurality of long rods are fixedly connected to the lower end surface of the fourth circular ring plate and are evenly distributed. The long rods are vertically downward. The long rods penetrate through the first anchor plate and are slidably connected to the first anchor plate. The lower end of the long rod is fixedly connected with a first top and loosen plate. A plurality of third circular through holes are provided on the first top and loosen plate. The number and positions of the third circular through holes correspond to the second circular through holes one by one. First top and loosen sleeves are fixedly installed on the upper end surface of the first top and loosen plate along the circumferences of the third circular through holes. The first top and loosen sleeves can be inserted into the first anchor holes to push the first clamping pieces.

[0008] Further, the first anchor hole is in the shape of a tapered hole with a larger upper end and a smaller lower end. The first clamping piece is a conical thin sheet with a larger upper end and a smaller lower end, and the conical wall of the first clamping piece is thicker near the upper end.

[0009] Further, first sliding rails are provided at both ends of the first rotating shaft. The first sliding rails are horizontally placed. The first sliding rails are fixedly supported by the second circular plate through first fixing members. A first connecting shaft placed coaxially is connected to the first rotating wheel. The first connecting shaft penetrates through the first rotating wheel. The two ends of the first connecting shaft are respectively inserted into the first sliding rails on both sides. The first connecting shaft can slide along the first sliding rails. First through grooves are provided on the first sliding rails. When the first rotating shaft moves up and down, it can penetrate through the first through grooves.

[0010] Further, a corrugated cylinder is fixedly connected between the second circular ring plate and the third circular ring plate. The first telescopic cylinders are all located inside the corrugated cylinder.

[0011] Further, a plurality of second telescopic cylinders evenly distributed are provided on the third ring plate. The bottom of the second telescopic cylinder is fixedly connected to the upper end face of the third ring plate. The telescopic rod of the second telescopic cylinder is fixedly connected with a fifth ring plate. The fifth ring plate is connected with a second clamping mechanism. The second clamping mechanism includes a second anchor plate. The second anchor plate is sleeved on the inner side wall of the fifth ring plate. A plurality of second anchor holes are formed in the second anchor plate. The second anchor holes correspond to the first anchor holes one by one. The second anchor holes are in the shape of a tapered hole with a larger upper end and a smaller lower end. Second clamping pieces are arranged in the second anchor holes. The second clamping pieces are in the shape of a conical thin sheet with a larger upper end and a smaller lower end, and the conical wall of the second clamping piece is thicker at the upper part closer to the upper end.

[0012] Further, a second top-and-loosen unit is provided on the fifth ring plate. The second top-and-loosen unit includes second runners. The second runners are provided in two parallel and symmetrical ones. Second handles are fixedly installed on the second runners. Second rotating shafts are connected to the second runners. The second rotating shafts pass through the second runners and are rotationally connected with the second runners, and the central axis of the second rotating shaft is not collinear with the central axis of the second runner. Second force-transferring rods are fixedly connected to both ends of the second rotating shaft. The second force-transferring rods are placed vertically downward. The second force-transferring rods pass through the fifth ring plate. The second force-transferring rods are slidable between the second force-transferring rods and the fifth ring plate. A second top-and-loosen plate is fixedly connected to the lower end of the second force-transferring rod. A plurality of fourth circular through holes are formed in the second top-and-loosen plate. The fourth circular through holes correspond to the second anchor holes one by one. Second top-and-loosen sleeves are fixedly arranged along the circumferential side of the fourth circular through hole. The second top-and-loosen sleeves can be inserted into the second anchor holes.

[0013] Further, second slide rails are provided at both ends of the second rotating shaft. The second slide rails are fixedly supported by the fifth ring plate through second fixing members. A second connecting shaft placed coaxially is connected to the second runner. The second connecting shaft passes through the second runner. The two ends of the second connecting shaft are respectively inserted into the second slide rails on both sides. The second connecting shaft can slide along the second slide rails. Second through grooves are formed in the second slide rails. The second rotating shaft can pass through the second through grooves when moving up and down.

[0014] Further, a clamping plate is fixedly connected to the upper end of the second clamping piece. The clamping plate is connected through and communicated with the second clamping plate. A third circular plate is provided on the second anchor plate. A fifth circular through hole is formed in the third circular plate. The second anchor plate and the third circular plate are fixedly supported through a second support column. The second support column passes through the clamping plate. The clamping plate can slide up and down along the second support column. A plurality of uniformly distributed support plates are fixedly installed on the circumferential side wall of the third circular plate. First springs are fixedly connected to the lower end faces of the support plates. The lower ends of the first springs are fixedly connected to the clamping plate.

[0015] Further, a speed reduction mechanism is provided. The speed reduction mechanism includes a plurality of straight racks which are placed vertically downward. The number of straight racks is equal to the number of second telescopic cylinders. The upper ends of the straight racks and the upper ends of the second telescopic cylinders are fixedly connected through connecting pieces. Semi-circular gears are meshed with the straight racks. Connecting bars are provided on both sides of the tooth surfaces of the semi-circular gears. The semi-circular gears are rotatably connected to the connecting bars through third rotating shafts. The upper ends of the connecting bars are fixedly connected to the lower end surfaces of the fifth circular plates. A connecting plate is rotatably hinged on the flat section where the tooth tips of the semi-circular gears face each other. A speed reduction plate coaxially placed with the second anchor plate is provided between the connecting plates. A plurality of speed reduction holes are formed in the speed reduction plate, and the speed reduction holes correspond to the second anchor holes one by one. The speed reduction plate is made of elastic rubber material. A plurality of uniformly distributed second springs are fixedly connected to the peripheral side wall of the speed reduction plate. The number of second springs is equal to the number of straight racks. The other ends of the second springs are connected to rotating parts, and the rotating parts are rotatably connected to the lower ends of the connecting plates. A telescopic rubber rod is sleeved in the second spring. One end of the telescopic rubber rod is rotatably hinged to the speed reduction plate, and the other end of the telescopic rubber rod is fixedly connected to the rotating part. The telescopic rubber rod is used for supporting the second spring.

[0016] Advantages of the present disclosure:

[0017] 1. In order to solve the inconvenience of manually taking out the clamping pieces in the prior art, the present invention invents a device for overall relaxation of steel strand bundles. By rotating the first handle and the second handle to control the loosening of the clamping pieces, it avoids the close contact between the worker's body and the steel strand bundles during the relaxation and taking out of the clamping pieces, making the relaxation process more convenient and safe.

[0018] 2. The invented device for overall relaxation of steel strand bundles can slow down the retracting speed of the steel strand bundles during relaxation, avoid the breakage of the steel strand bundles when retracting, and improve the safety during the relaxation process. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is the overall structural schematic diagram of the present invention;

[0021] Figure 2 It is the partial unit structural schematic diagram of the present invention;

[0022] Figure 3 It is the structural schematic diagram of the limiting mechanism of the present invention;

[0023] Figure 4 It is the partial unit structural schematic diagram of the present invention;

[0024] Figure 5 is a schematic structural diagram of the first top-loosening unit of the present invention;

[0025] Figure 6 is a schematic structural diagram of the second top-loosening unit of the present invention;

[0026] Figure 7 is a schematic structural diagram of some units of the present invention;

[0027] Figure 8 is a schematic structural diagram of the speed reduction mechanism of the present invention. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

[0029] As Figures 1 - 8 shown, a device for overall relaxation of a steel strand bundle includes a limiting mechanism 100. The limiting mechanism 100 includes a first circular ring plate 101. A sleeve 102 is fixedly installed on the first circular ring plate 101. The first circular ring plate 101 and the sleeve 102 are coaxially arranged. The inner diameter of the sleeve 102 is smaller than the inner diameter of the first circular ring plate 101. Both ends of the sleeve 102 communicate with the outside. A first circular plate 103 coaxially arranged is provided inside the sleeve 102. The circumferential side of the first circular plate 103 fits against the inner wall of the sleeve 102. A plurality of uniformly distributed first circular through holes 1031 are formed on the first circular plate 103. A strong magnetic ring is pasted in the first circular through hole 1031 with metal glue. A plurality of uniformly distributed ear plates 1032 are fixedly connected to the circumferential side of the first circular plate 103. A plurality of uniformly distributed sliding grooves 1021 are formed on the side wall of the sleeve 102. The positions of the sliding grooves 1021 correspond to the positions of the ear plates 1032. The ear plates 1032 pass through the sliding grooves 1021 and can slide up and down along the first slide. A plurality of uniformly distributed rotating motors 104 are fixedly installed on the first circular ring plate 101. The positions of the rotating motors 104 correspond to the positions of the ear plates 1032 one by one. Threaded rods 1041 are provided at the output ends of the rotating motors 104. The threaded rods 1041 pass through the ear plates 1032 and are threadedly connected to the ear plates 1032. A second circular ring plate 200 fixedly connected is sleeved on the upper end of the sleeve 102. A plurality of uniformly distributed first telescopic cylinders 300 are provided on the second circular ring plate 200. The bottom of the first telescopic cylinder 300 is fixedly connected to the upper end surface of the second circular ring plate 200. The telescopic rod of the first telescopic cylinder 300 is fixedly connected to a third circular ring plate 400. The third circular ring plate 400 is connected to a first clamping mechanism 500;

[0030] The first fixture mechanism 500 includes a first anchor plate 501. The peripheral wall of the first anchor plate 501 is fixedly connected to the inner side wall of the third circular plate 400. A plurality of first anchor holes 5011 evenly distributed are formed in the first anchor plate 501. The positions and numbers of the first anchor holes 5011 are the same as those of the first circular through holes 1031. First clamping pieces are placed in the first anchor holes 5011. There is a second circular plate 502 above the first anchor plate 501. The first anchor plate 501 and the second circular plate 502 are fixedly connected by a plurality of first support columns. A plurality of second circular through holes 5021 are formed in the second circular plate 502. The second circular through holes 5021 correspond to the first anchor holes 5011 one by one;

[0031] A first jacking and loosening unit 600 is provided on the second circular plate 502. The first jacking and loosening unit 600 includes a first rotating wheel 601. The number of the first rotating wheels 601 is two. The two first rotating wheels 601 are placed in parallel and symmetrically. The first rotating wheels 601 are vertically placed on the second circular plate 502. First handles 602 are fixedly installed on the first rotating wheels 601. The other ends of the first handles 602 face away from the central axis of the second circular plate 502. First rotating shafts 6011 are rotatably connected to the first rotating wheels 601. The central axis of the first rotating shaft 6011 is not collinear with the central axis of the first rotating wheel 601. Both ends of the first rotating shaft 6011 penetrate through the first rotating wheel 601. Both ends of the first rotating shaft 6011 are fixedly connected with first force transmission rods 603. The first force transmission rods 603 are placed in a vertically upward state. The upper ends of the first force transmission rods 603 are fixedly connected with a fourth circular plate 604. A plurality of long rods 605 evenly distributed are fixedly connected to the lower end surface of the fourth circular plate 604. The long rods 605 are placed in a vertically downward state. The long rods 605 penetrate through the first anchor plate 501 and are slidably connected to the first anchor plate 501. The lower ends of the long rods 605 are fixedly connected with a first jacking and loosening plate 606. A plurality of third circular through holes are formed in the first jacking and loosening plate 606. The numbers and positions of the third circular through holes correspond to the second circular through holes 5021 one by one. First jacking and loosening sleeves 607 are fixedly installed on the upper end surface of the first jacking and loosening plate 606 along the circumferences of the third circular through holes. The first jacking and loosening sleeves 607 can be inserted into the first anchor holes 5011 to jack the first clamping pieces;

[0032] Fixing pieces are inserted into the steel strands at the required tensioning end to prevent the steel strands from shrinking into the bench. Place this device on the bench of the steel strand bundle to be tensioned. Each steel strand of the steel strand bundle passes through the first circular through hole 1031, passes through the tapered holes on the first anchor plate 501, and finally passes through the second circular through holes 5021 on the second circular plate 502. Turn on this device. The working steps of this device are as follows:

[0033] Step 1: Turn on the rotating motor 104. The output end of the rotating motor 104 drives the threaded rod 1041. Threaded transmission is carried out between the threaded rod 1041 and the ear plate 1032, so that the ear plate 1032 approaches the first circular ring plate 101 along the chute 1021. The ear plate 1032 drives the first circular plate 103, and the first circular plate 103 drives the strong magnetic ring in the first circular through hole 1031 to approach the pedestal, so that the strong magnetic ring adsorbs to the fixing piece for fixing the steel strand before tensioning in the pedestal;

[0034] Step 2: Turn on the first telescopic cylinder 300. The telescopic rod of the first telescopic cylinder 300 extends to push the third circular ring plate 400. The third circular ring plate 400 drives the first clamping mechanism 500 to carry out tensioning on the steel strand bundle. During the tensioning process, the first anchor hole 5011 cooperates with the first wedge-shaped clamp to prevent the steel strand from retracting during tensioning; While tensioning, turn on the rotating motor 104 to drive the threaded rod 1041. Threaded transmission is carried out between the threaded rod 1041 and the ear plate 1032, so that the ear plate 1032 drives the first circular plate 103 to move away from the pedestal. The first circular plate 103 drives the strong magnetic ring. As the tensioning progresses, the strong magnetic ring drives the fixing piece to move away from the pedestal, so that the steel strand is separated from the fixation with the pedestal, facilitating the tensioning of the steel strand;

[0035] Step 3: When the first wedge-shaped clamp is in a free clamping state, the first handle 602 is placed obliquely upward. At this time, the first rotating shaft 6011 on the first rotating wheel 601 is close to the upper end face of the second circular plate 502, the first loosening plate 606 is far away from the first anchor plate 501, and the first loosening sleeve 607 is not inserted into the first anchor hole 5011; After the tensioning is completed, pull down the first handle 602. The first handle 602 drives the first rotating wheel 601, and the first rotating wheel 601 drives the first rotating shaft 6011. Through the eccentric rotation between the first rotating wheel 601 and the first rotating shaft 6011, the first rotating shaft 6011 rotates upward to be away from the second circular plate 502. The first rotating shaft 6011 drives the first force transmission rod 603, and the first force transmission rod 603 pushes the fourth circular ring plate 604 upward. The fourth circular ring plate 604 pulls the long rod 605 to move upward. The long rod 605 drives the first loosening plate 606, and the first loosening plate 606 drives the first loosening sleeve 607 to be inserted into the first anchor hole 5011. Through the pushing of the first loosening sleeve 607, the first wedge-shaped clamp is loosened from the first anchor hole 5011, so that the steel strand is separated from the clamping of the first anchor plate 501, facilitating the relaxation and retraction of the steel strand, avoiding the close contact between the worker's body and the steel strand when taking the first wedge-shaped clamp during relaxation, and making the relaxation process more convenient and safe.

[0036] In order to prevent the steel strand from retracting during tensioning and achieve firm fixation of the steel strand during tensioning, the first anchor hole 5011 is in the shape of a tapered hole with a larger upper end and a smaller lower end, the first wedge is in the shape of a conical thin sheet with a larger upper end and a smaller lower end, and the conical wall of the first wedge is thicker at the upper part closer to the upper end; when starting to tension, the steel strand and the first anchor plate 501 move relative to each other, so that the first wedge is inserted into the first anchor hole 5011, completing the clamping and holding of the steel strand, and achieving the purpose of preventing the steel strand from retracting during tensioning.

[0037] In order to facilitate the eccentric rotation of the first runner 601 and at the same time not interfere with the normal operation of the first loosening unit 600, both ends of the first rotating shaft 6011 are provided with first slide rails 608. The first slide rails 608 are horizontally placed, and the first slide rails 608 are fixedly supported by the first fixing members 609 and the second circular plate 502. A first connecting shaft placed coaxially is connected to the first runner 601. The first connecting shaft passes through the first runner 601, and both ends of the first connecting shaft are respectively inserted into the first slide rails 608 on both sides. The first connecting shaft can slide along the first slide rails 608. First through grooves 6081 are formed in the first slide rails 608. When the first rotating shaft 6011 moves up and down, it can pass through the first through grooves 6081; the first slide rails 608 can restrict and constrain the horizontal height of the first runner 601, preventing the horizontal position of the first runner 601 from changing when pulling the first handle 602. During the eccentric rotation of the first runner 601, the first connecting shaft can slide horizontally along the first slide rails 608, achieving the purpose of facilitating the eccentric rotation of the first runner 601 and at the same time not interfering with the normal operation of the first loosening unit 600.

[0038] In order to prevent the steel strand from breaking and splashing during tensioning and causing harm to the surrounding workers, a corrugated tube 700 is fixedly connected between the second circular ring plate 200 and the third circular ring plate 400. Both ends of the corrugated tube 700 communicate with the outside, and the first telescopic cylinder 300 is located inside the corrugated tube 700; when the steel strand breaks during tensioning, the corrugated tube 700 can effectively prevent splashing.

[0039] After the initial tensioning of the steel strand is completed, due to the slippage between the first wedge grip and the steel strand, the prestress loss is often relatively serious, and the specified target control force cannot be achieved. To improve the tensioning effect and make up for the prestress loss in the initial tensioning, a plurality of uniformly distributed second telescopic cylinders 800 are provided on the third circular plate 400. The bottom of the second telescopic cylinder 800 is fixedly connected to the upper end surface of the third circular plate 400. The telescopic rod of the second telescopic cylinder 800 is fixedly connected to a fifth circular plate 900. The fifth circular plate 900 is connected to a second fixture mechanism 1000. The second fixture mechanism 1000 includes a second anchor plate 1001. The second anchor plate 1001 is sleeved on the inner side wall of the fifth circular plate 900. A plurality of second anchor holes are provided on the second anchor plate 1001. The second anchor holes correspond to the first anchor holes 5011 one by one. The second anchor holes are in the shape of a tapered hole with a larger upper end and a smaller lower end. Second wedge grips 1002 are provided in the second anchor holes. The second wedge grips 1002 are in the shape of a conical thin sheet with a larger upper end and a smaller lower end, and the conical wall of the second wedge grip 1002 is thicker at the upper part. The steel strand bundle passes through the second anchor holes. The second telescopic cylinder 800 is opened, and the telescopic rod of the second telescopic cylinder 800 extends to push the fifth circular plate 900. The fifth circular plate 900 drives the second fixture mechanism 1000 to perform secondary tensioning, so as to achieve the purpose of making up for the prestress loss in the initial tensioning and improving the tensioning effect.

[0040] To facilitate the loosening of the second wedge grip 1002, a second loosening unit 11 is provided on the fifth circular plate 900. The second loosening unit 11 includes two second rotating wheels 111 which are parallel and symmetrical. Second handles 112 are fixedly installed on the second rotating wheels 111. Second rotating shafts 1111 are connected to the second rotating wheels 111. The second rotating shafts 1111 pass through the second rotating wheels 111 and are rotatably connected to the second rotating wheels 111, and the central axis of the second rotating shaft 1111 is not collinear with the central axis of the second rotating wheel 111. Second force transmission rods 113 are fixedly connected to both ends of the second rotating shaft 1111. The second force transmission rods 113 are placed vertically downward. The second force transmission rods 113 pass through the fifth circular plate 900, and the second force transmission rods 113 are slidable between the second force transmission rods 113 and the fifth circular plate 900. A second loosening plate 114 is fixedly connected to the lower end of the second force transmission rod 113. A plurality of fourth circular through holes are provided on the second loosening plate 114. The fourth circular through holes correspond to the second anchor holes one by one. Second loosening sleeves are fixed along the circumferential side of the fourth circular through holes. The second loosening sleeves can be inserted into the second anchor holes.

[0041] When the second clamping piece 1002 is freely clamped, the second rotating shaft 1111 is located on the side close to the fifth circular ring plate 900, and the second top loosening plate 114 is far away from the second anchor plate 1001. When tension release is required, the second handle 112 is pulled. The second handle 112 drives the second rotating wheel 111, the second rotating wheel 111 drives the second rotating shaft 1111, the second rotating shaft 1111 rotates away from the fifth circular ring plate 900, the second rotating shaft 1111 drives the second force transmission rod 113, the second force transmission rod 113 pulls the second top loosening plate 114 to move upward, and the second top loosening plate 114 drives the second top loosening sleeve to insert into the second anchor hole, so that the second top loosening sleeve tops and loosens the second clamping piece 1002, achieving the purpose of facilitating the top loosening of the second clamping piece 1002 in the second fixture mechanism 1000.

[0042] In order to facilitate the eccentric rotation of the second rotating wheel 111, second slide rails 115 are provided at both ends of the second rotating shaft 1111. The second slide rails 115 are fixedly supported by the fifth circular ring plate 900 through second fixing members. A second connecting shaft placed coaxially is connected to the second rotating wheel 111. The second connecting shaft passes through the second rotating wheel 111, and both ends of the second connecting shaft are respectively inserted into the second slide rails 115 on both sides. The second connecting shaft can slide along the second slide rails 115. Second through grooves are formed in the second slide rails 115. When the second rotating shaft 1111 moves up and down, it can pass through the second through grooves, achieving the purpose of facilitating the eccentric rotation of the second rotating wheel 111.

[0043] In order to reduce the loss of prestress caused by the slip between the second clamping piece 1002 and the steel strand, a clamping piece plate 13 is fixedly connected to the upper end of the second clamping piece 1002. The clamping piece plate 13 is connected through and communicated with the second clamping plate. A third circular plate 12 is provided on the second anchor plate 1001. A fifth circular through hole 121 is formed in the third circular plate 12. The second anchor plate 1001 and the third circular plate 12 are fixedly supported by second support columns. The second support columns pass through the clamping piece plate 13, and the clamping piece plate 13 can slide up and down along the second support columns. A plurality of uniformly distributed support plates are fixedly installed on the circumferential side wall of the third circular plate 12. The lower end surfaces of the support plates are fixedly connected with first springs 14. The lower ends of the first springs 14 are fixedly connected with the clamping piece plate 13. When slip occurs between the second clamping piece 1002 and the steel strand during the tensioning process, the first spring 14 can push the clamping piece plate 13, and the clamping piece plate 13 pushes the second clamping piece 1002 to insert into the second anchor hole, achieving the purpose of reducing the loss of prestress caused by the slip between the second clamping piece 1002 and the steel strand.

[0044] In order to slow down the retraction speed of the steel strand during relaxation and make the relaxation process safer, a deceleration mechanism 150 is provided. The deceleration mechanism 150 includes a plurality of straight racks 151, which are vertically downward. The number of straight racks 151 is equal to the number of second telescopic cylinders 800. The upper ends of the straight racks 151 and the upper ends of the second telescopic cylinders 800 are fixedly connected through connectors. Semi-circular gears 152 are meshed with the straight racks 151. Connecting strips 153 are provided on both sides of the tooth surfaces of the semi-circular gears 152. The semi-circular gears 152 are rotatably connected to the connecting strips 153 through third rotating shafts. The upper ends of the connecting strips 153 are fixedly connected to the lower end surfaces of the fifth circular plates 900. Connecting plates 154 are rotatably hinged on the flat sections opposite to the tooth tips of the semi-circular gears 152. A deceleration plate 155 coaxial with the second anchor plate 1001 is provided between the connecting plates 154. A plurality of deceleration holes are provided in the deceleration plate 155, and the deceleration holes correspond to the second anchor holes one by one. The deceleration plate 155 is made of elastic rubber material. A plurality of uniformly distributed second springs 156 are fixedly connected to the peripheral side wall of the deceleration plate 155. The number of second springs 156 is equal to the number of straight racks 151. The other ends of the second springs 156 are connected to rotating parts, and the rotating parts are rotatably connected to the lower ends of the connecting plates 154. A telescopic rubber rod is sleeved in the second spring 156. One end of the telescopic rubber rod is rotatably hinged to the deceleration plate 155, and the other end of the telescopic rubber rod is fixedly connected to the rotating part. The telescopic rubber rod is used for supporting the second spring 156. When the telescopic rod of the second telescopic cylinder 800 extends for secondary tensioning, the telescopic rod of the second telescopic cylinder 800 drives the connector, the connector drives the straight rack 151, the straight rack 151 meshes with the semi-circular gear 152, and the rotation of the semi-circular gear 152 drives the lower end of the connecting plate 154 away from the deceleration plate 155. The connecting plate 154 pulls the second spring 156, and the second spring 156 pulls the deceleration plate 155 to enlarge the deceleration holes on the deceleration plate 155, facilitating the tensioning process. When relaxation is required, first activate the second telescopic cylinder 800 to retract part of the telescopic rod of the second telescopic cylinder. The retraction of the telescopic rod of the second telescopic cylinder 800 drives the meshing rotation of the straight rack 151 and the semi-circular gear 152. The semi-circular gear 152 drives the connecting plate 154, the lower end of the connecting plate 154 approaches the deceleration plate 155, the connecting plate 154 compresses the second spring 156, and the second spring 156 compresses the deceleration plate 155 to reduce the diameter of the holes on the deceleration plate 155. Then activate the first loosening unit 600 and the second loosening unit 11 to relax the steel strand bundle. During the retraction process of the steel strand, due to the frictional force between the steel strand and the deceleration plate 155 when passing through the deceleration holes, the retraction speed of the steel strand during relaxation is slowed down, making the relaxation process safer.

[0045] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0046] The above shows and describes the basic principles, main features and advantages of the present disclosure. Those skilled in the art of this industry should understand that the present disclosure is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present disclosure. Without departing from the spirit and scope of the present disclosure, the present disclosure will have various changes and improvements, and these changes and improvements all fall within the scope of the present disclosure claimed.

Claims

1. An overall tension release device for a steel strand bundle, including a limiting mechanism (100), characterized in that, The limiting mechanism (100) includes a first circular ring plate (101). A sleeve (102) is fixedly installed on the first circular ring plate (101). The first circular ring plate (101) and the sleeve (102) are coaxially arranged. The inner diameter of the sleeve (102) is smaller than that of the first circular ring plate (101). Both ends of the sleeve (102) communicate with the outside. A first circular plate (103) arranged coaxially is provided inside the sleeve (102). The circumferential side of the first circular plate (103) fits against the inner wall of the sleeve (102). A plurality of first circular through holes (1031) evenly distributed are formed on the first circular plate (103). Powerful magnetic rings are pasted in the first circular through holes (1031) by metal glue. A plurality of evenly distributed ear plates (1032) are fixedly connected to the circumferential side of the first circular plate (103). A plurality of evenly distributed sliding grooves (1021) are formed on the side wall of the sleeve (102). The positions of the sliding grooves (1021) correspond to those of the ear plates (1032). The ear plates (1032) pass through the sliding grooves (1021) and can slide up and down along the first slide. A plurality of evenly distributed rotating motors (104) are fixedly installed on the first circular ring plate (101). The positions of the rotating motors (104) correspond one by one to those of the ear plates (1032). Threaded rods (1041) are provided at the output ends of the rotating motors (104). The threaded rods (1041) pass through the ear plates (1032) and are threadedly connected to the ear plates (1032). A second circular ring plate (200) fixedly connected is sleeved on the upper end of the sleeve (102). A plurality of evenly distributed first telescopic cylinders (300) are provided on the second circular ring plate (200). The bottom of the first telescopic cylinder (300) is fixedly connected to the upper end surface of the second circular ring plate (200). The telescopic rod of the first telescopic cylinder (300) is fixedly connected to a third circular ring plate (400). The third circular ring plate (400) is connected to a first clamping mechanism (500); The first clamping mechanism (500) includes a first anchor plate (501). The peripheral wall of the first anchor plate (501) is fixedly connected to the inner side wall of the third circular ring plate (400). A plurality of evenly distributed first anchor holes (5011) are formed on the first anchor plate (501). The positions and numbers of the first anchor holes (5011) are the same as those of the first circular through holes (1031). First clamping pieces are placed in the first anchor holes (5011). There is a second circular plate (502) above the first anchor plate (501). The first anchor plate (501) and the second circular plate (502) are fixedly connected by a plurality of first support columns. A plurality of second circular through holes (5021) are formed on the second circular plate (502). The second circular through holes (5021) correspond to the first anchor holes (5011) one by one; The second circular plate (502) is provided with a first loosening unit (600). The first loosening unit (600) includes a first runner (601). The number of the first runners (601) is two. The two first runners (601) are placed in parallel and symmetrically. The first runners (601) are vertically placed on the second circular plate (502). First handles (602) are fixedly installed on the first runners (601). The other ends of the first handles (602) face away from the central axis of the second circular plate (502). First rotating shafts (6011) are rotatably connected to the first runners (601). The central axis of the first rotating shaft (6011) is not collinear with the central axis of the first runner (601). The two ends of the first rotating shaft (6011) penetrate through the first runner (601). Both ends of the first rotating shaft (6011) are fixedly connected with first force transmission rods (603). The first force transmission rods (603) are vertically upward. The upper ends of the first force transmission rods (603) are fixedly connected with a fourth circular ring plate (604). A plurality of long rods (605) evenly distributed are fixedly connected to the lower end face of the fourth circular ring plate (604). The long rods (605) are vertically downward. The long rods (605) penetrate through the first anchor plate (501) and are slidably connected with the first anchor plate (501). The lower ends of the long rods (605) are fixedly connected with a first loosening plate (606). A plurality of third circular through holes are formed in the first loosening plate (606). The number and positions of the third circular through holes correspond to those of the second circular through holes (5021) one by one. First loosening sleeves (607) are fixedly installed on the upper end face of the first loosening plate (606) along the circumferences of the third circular through holes. The first loosening sleeves (607) can be inserted into the first anchor holes (5011) to push the first clamping pieces.

2. The overall tension release device for a steel strand bundle according to claim 1, characterized in that, The first anchor holes (5011) are in the shape of a tapered hole with a large upper end and a small lower end. The first clamping pieces are in the shape of a conical thin sheet with a large upper end and a small lower end, and the conical wall of the first clamping piece is thicker near the upper end.

3. The overall tension release device for a steel strand bundle according to claim 1, characterized in that, First sliding rails (608) are arranged at both ends of the first rotating shaft (6011). The first sliding rails (608) are horizontally placed. The first sliding rails (608) are fixedly supported by the second circular plate (502) through first fixing pieces (609). A first connecting shaft placed coaxially is connected to the first runner (601). The first connecting shaft penetrates through the first runner (601). The two ends of the first connecting shaft are respectively inserted into the first sliding rails (608) on both sides. The first connecting shaft can slide along the first sliding rails (608). First through grooves (6081) are formed in the first sliding rails (608). When the first rotating shaft (6011) moves up and down, it can penetrate through the first through grooves (6081).

4. The overall tension release device for a steel strand bundle according to claim 1, characterized in that, A corrugated cylinder (700) is fixedly connected between the second circular ring plate (200) and the third circular ring plate (400). The first telescopic cylinders (300) are all located inside the corrugated cylinder (700).

5. The overall tension release device for a steel strand bundle according to claim 1, characterized in that, A plurality of second telescopic cylinders (800) evenly distributed are provided on the third annular plate (400). The bottom of the second telescopic cylinder (800) is fixedly connected to the upper end surface of the third annular plate (400). A fifth annular plate (900) is fixedly connected to the telescopic rod of the second telescopic cylinder (800). The fifth annular plate (900) is connected to a second clamping mechanism (1000). The second clamping mechanism (1000) includes a second anchor plate (1001). The second anchor plate (1001) is sleeved on the inner side wall of the fifth annular plate (900). A plurality of second anchor holes are formed in the second anchor plate (1001). The second anchor holes correspond to the first anchor holes (5011) one by one. The second anchor holes are in the shape of a tapered hole with a large upper end and a small lower end. Second clamping pieces (1002) are arranged in the second anchor holes. The second clamping pieces (1002) are in the shape of a conical thin sheet with a large upper end and a small lower end, and the conical wall of the second clamping piece (1002) is thicker at the upper part closer to the upper end.

6. The overall tension release device for a steel strand bundle according to claim 5, characterized in that, A second top and loosen unit (11) is provided on the fifth annular plate (900). The second top and loosen unit (11) includes second runners (111). Two second runners (111) are provided in parallel and symmetrically. Second handles (112) are fixedly installed on the second runners (111). Second rotating shafts (1111) are connected to the second runners (111). The second rotating shafts (1111) pass through the second runners (111) and are rotatably connected to the second runners (111). The central axis of the second rotating shaft (1111) is not collinear with the central axis of the second runner (111). Second force transmission rods (113) are fixedly connected to both ends of the second rotating shaft (1111). The second force transmission rods (113) are placed vertically downward. The second force transmission rods (113) pass through the fifth annular plate (900). The second force transmission rods (113) are slidable between the second force transmission rods (113) and the fifth annular plate (900). A second top and loosen plate (114) is fixedly connected to the lower end of the second force transmission rod (113). A plurality of fourth circular through holes are formed in the second top and loosen plate (114). The fourth circular through holes correspond to the second anchor holes one by one. Second top and loosen sleeves are fixedly arranged along the circumferential side of the fourth circular through holes. The second top and loosen sleeves can be inserted into the second anchor holes.

7. The overall tension release device for a steel strand bundle according to claim 6, characterized in that, Second slide rails (115) are arranged at both ends of the second rotating shaft (1111). The second slide rails (115) are fixedly supported by the fifth annular plate (900) through second fixing members. A second connecting shaft placed coaxially is connected to the second runner (111). The second connecting shaft passes through the second runner (111). Both ends of the second connecting shaft are respectively inserted into the second slide rails (115) on both sides. The second connecting shaft can slide along the second slide rails (115). Second through grooves are formed in the second slide rails (115). The second rotating shaft (1111) can pass through the second through grooves when moving up and down.

8. The overall tension release device for a steel strand bundle according to claim 5, characterized in that, The upper end of the second clip (1002) is fixedly connected with a clip plate (13). The clip plate (13) is connected through between the second clamping plate. A third circular plate (12) is provided on the second anchor plate (1001). A fifth circular through hole (121) is formed in the third circular plate (12). The second anchor plate (1001) and the third circular plate (12) are supported and fixed by a second support column. The second support column passes through the clip plate (13). The clip plate (13) can slide up and down along the second support column. A plurality of uniformly distributed support plates are fixedly installed on the circumferential side wall of the third circular plate (12). The lower end surfaces of the support plates are fixedly connected with first springs (14). The lower ends of the first springs (14) are fixedly connected with the clip plate (13).

9. The overall tension release device for a steel strand bundle according to claim 5, characterized in that, A speed reduction mechanism (150) is provided. The speed reduction mechanism (150) includes a plurality of straight racks (151). The straight racks (151) are placed vertically downward. The number of the straight racks (151) is equal to the number of the second telescopic cylinders (800). The upper ends of the straight racks (151) and the upper ends of the second telescopic cylinders (800) are fixedly connected through connectors. Semi-circular gears (152) are engaged with the straight racks (151). Connecting strips (153) are provided on both sides of the tooth surfaces of the semi-circular gears (152). The semi-circular gears (152) are rotatably connected with the connecting strips (153) through third rotating shafts. The upper ends of the connecting strips (153) are fixedly connected with the lower end surface of a fifth circular ring plate (900). A connecting plate (154) is rotatably hinged on the flat section where the tooth tips of the semi-circular gears (152) face each other. A speed reduction plate (155) coaxial with the second anchor plate (1001) is provided between the connecting plates (154). A plurality of speed reduction holes are formed in the speed reduction plate (155). The speed reduction holes correspond to the second anchor holes one by one. The speed reduction plate (155) is made of elastic rubber material. A plurality of uniformly distributed second springs (156) are fixedly connected to the circumferential side wall of the speed reduction plate (155). The number of the second springs (156) is equal to the number of the straight racks (151). The other ends of the second springs (156) are connected with rotating parts. The rotating parts are rotatably connected with the lower ends of the connecting plates (154). A telescopic rubber rod is sleeved in the second spring (156). One end of the telescopic rubber rod is rotatably hinged to the speed reduction plate (155). The other end of the telescopic rubber rod is fixedly connected with the rotating part. The telescopic rubber rod is used for supporting the second spring (156).

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