Steel strand stay cable overall tensioning tool and stay cable tensioning process based on same

Abstract

The invention firstly discloses a steel strand stay cable overall tensioning tool and a stay cable tensioning process based on the steel strand stay cable overall tensioning tool, the steel strand stay cable overall tensioning tool comprises a tensioning supporting frame, a tensioning rod and a center hole jack, one end of the tensioning supporting frame is connected with a connecting disc, the tensioning supporting frame surrounds a protective end cover and a supporting cylinder, and the center hole jack is connected with the tensioning rod; a positioning hole is formed in the protective end cover, one end of the tensioning rod extends into the positioning hole, a step is formed at one end of the tensioning rod and used for being tightly attached to the end face of the protective end cover, and the center hole jack shell is installed on the tensioning supporting frame. The integral tensioning tool for the steel strand stay cable and the stay cable tensioning process based on the integral tensioning tool solve the problem that in the prior art, a heavy protective end cover cannot be sleeved with a heavy supporting cylinder.

Description

Technical Field

[0001] The invention relates to a tensioning tool, and in particular to an integral tensioning tool for a steel stranded cable and a tensioning process for a cable based thereon. Background Art

[0002] The Chinese patent discloses a cable with application number: CN202120299495.8, which includes: a cable body, a fastening device, a shockproof device, a sealing device, a clamping device, a protective end cap, an anchor plate, a support tube, a protective tube and a protective sleeve, the protective sleeve surrounds all the cable bodies, one end of the protective sleeve is connected to a protective tube, the protective tube is connected to the anchor plate through the support tube, the anchor plate is covered by the protective end cap on the side away from the protective tube, a fastening device is installed at the connection between the protective tube and the protective sleeve, the fastening device is used to bind all the cable bodies together, a shockproof device for the cable body to pass through is installed in one end of the protective tube close to the protective sleeve, a sealing device is installed in the other end of the protective tube, the sealing device is used to prevent water from entering the support tube, the support tube, the anchor plate and the protective end cap are all passed through by the cable body, and the first anti-corrosion layer is filled in the gap between the protective end cap and the cable body. A connecting disk is fixed to the outer wall of the support tube.

[0003] Although the inclined cable solves the problem of poor anti-corrosion effect in the prior art, the inclined cable still has the following disadvantages: during the assembly process, the support tube equipped with the anchor plate and the clamping device needs to be pushed close to each other. At this time, the clamping device has clamped the steel strand, so the support tube is particularly heavy. How to extend the heavier support tube into the heavier protective end cover is an urgent problem to be solved. Summary of the invention

[0004] The present invention aims to provide a steel strand cable-stayed cable integral tensioning tool and a cable-stayed cable tensioning process based thereon, so as to solve the problem in the prior art that a heavier support cylinder cannot be put on a heavier protective end cover.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention firstly discloses an integral tensioning tool for a steel strand inclined cable, which is used for a steel strand inclined cable. The steel strand inclined cable comprises: a cable body, a fastening device, a protective tube, a support tube, an anchor plate, a clamping device, a protective end cover, a clamping plate and a connecting plate. There are at least three cable bodies, and all the cable bodies are fastened by the fastening device. The fastening device is installed at one end of the protective tube, and the other end of the protective tube is connected to one end of the support tube. An anchor plate is installed in the middle of the support tube, and a through hole is provided on the anchor plate for each cable body to pass through. A clamping device is installed in the through hole, and the clamping device is used to squeeze the inner wall of the through hole under the pressure. The clamping cable body, the end of the support tube close to the protective tube protrudes with a connecting plate, the connection between the support tube and the anchor plate is covered by the protective end cover, and the end of the anchor plate protruding from the support tube is connected to a clamping plate, and the clamping plate presses the clamping device into the anchor plate; the overall tensioning tooling of the steel strand inclined cable includes: a tensioning support frame, a tensioning rod and a through-hole jack, one end of the tensioning support frame is connected to the connecting plate, the tensioning support frame surrounds the protective end cover and the outside of the support tube, the protective end cover is provided with a positioning hole, the positioning hole is for one end of the tensioning rod to extend into, one end of the tensioning rod forms a step, the step is used to fit tightly against the end face of the protective end cover, and the through-hole jack shell is installed on the tensioning support frame.

[0007] Preferably, an in-place indicator mechanism is installed on the tension rod, and an elastic member is connected between the in-place indicator mechanism and the tension rod. The first end of the in-place indicator mechanism is used to be in close contact with the clamping plate. A notch is provided at the end of the tension rod away from the protective end cover, and the notch is used for the second end of the in-place indicator mechanism to extend into. The elastic member is used to make the second end of the in-place indicator mechanism away from the notch.

[0008] Preferably, the position indicating mechanism is a rod-shaped structure.

[0009] Preferably, the tensioning support frame includes: a first support ring, a second support ring and intermediate connecting ribs, the first support ring is connected to the connecting plate, the first support ring passes through at least three intermediate connecting ribs, and a through-hole jack housing is installed on the second support ring.

[0010] Preferably, a connecting piece is connected to the connecting disk, and the connecting piece is connected to the connecting disk by screws. The connecting piece limits the first support ring from being separated from the connecting disk, and limits the first support ring from rotating relative to the connecting disk.

[0011] The present invention also discloses a stay cable tensioning process, which is implemented based on the above-mentioned steel strand stay cable integral tensioning tooling; the stay cable tensioning process comprises the following steps:

[0012] S1. Sleeve the clamping device outside the cable body and place the clamping device in the anchor plate; S2. Sleeve the clamping plate outside the connecting bolt; S3. Connect the tensioning support frame in the overall tensioning tooling of the steel strand inclined cable with the connecting plate; S4. Start the through-hole jack to extend, and the push ring connected to the tensioning rod in the through-hole jack is pressed on the clamping plate, and the clamping plate presses the clamping device in the anchor plate; S5. Start the through-hole jack to retract; S6. Start the through-hole jack to extend, and the tensioning rod of the through-hole jack passes through the protective end cover, and the step on the tensioning rod presses the protective end cover outside the anchor plate; S7. Use an external bolt structure to connect the anchor plate and the protective end cover, or weld the protective end cover to the anchor plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] Before tensioning, the anchor plate has been put on the outside of the cable body, and the anchor plate has been connected to the support tube. There is a connecting bolt passing through the anchor plate, and one end of the connecting bolt is located in the support tube and has been threadedly connected to the first nut. During tensioning, first, the clamping device is put on the outside of the cable body, and the clamping device is placed in the anchor plate; then, the clamping plate is put on the outside of the connecting bolt; then, the tensioning support frame in the overall tensioning tooling of the steel strand inclined cable is connected to the connecting plate; then, the through-hole jack is started to extend, and the push ring connected to the tensioning rod in the through-hole jack is pressed against the clamping plate, and the clamping plate presses the clamping device into the anchor plate. As the clamping device is pressed into the anchor plate, the hole opened in the anchor plate for the clamping device to extend into is the anchor hole, and the anchor hole It is a truncated cone structure. The more the clamping device is pressed into the anchor plate, the more the clamping device clamps the cable body, thus ensuring the anchoring strength; then, the through-hole jack is started to retract, and there is enough space between the push ring on the tension rod and the clamping plate for the protective end cover to be placed; then, the through-hole jack is started to extend, and the through-hole jack tension rod passes through the protective end cover, and the step on the tension rod presses the protective end cover outside the anchor plate; finally, the anchor plate and the protective end cover are connected using an external bolt structure, or the protective end cover and the anchor plate are welded. In the above process, the length of the tension support frame is adjusted so that there is enough space between the push ring and the clamping plate to put the protective end cover, without disassembling the tension support frame, which causes troublesome operation and long operation time. Then, it can be ensured that the protective end cover is pushed outside the anchor plate, avoiding the need to manually maintain the position of the protective end cover when connecting the protective end cover to the anchor plate, which causes difficulty in operation.

[0015] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the overall tensioning tooling for steel stranded cable stays.

[0017] Figure 2 for Figure 1 Enlarged view of the middle tension support frame.

[0018] Figure numerals: cable body 11, fastening device 12, protective tube 13, support tube 14, anchor plate 15, clamping device 16, protective end cover 17, clamping plate 18, connecting plate 19, tensioning support frame 21, first support ring 211, second support ring 212, middle connecting rib 213, tensioning rod 22, through-core jack 23, pushing ring 24, in-position indication mechanism 31, elastic member 32. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and functions of the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0020] Example 1

[0021] like Figure 1 as well as Figure 2 As shown, the present invention discloses an integral tensioning tool for a steel strand inclined cable, which is used for a steel strand inclined cable. The steel strand inclined cable comprises: a cable body 11, a fastening device 12, a protective tube 13, a support tube 14, an anchor plate 15, a clamping device 16, a protective end cover 17, a clamping plate 18 and a connecting plate 19. There are at least three cable bodies 11, and all the cable bodies 11 are fastened by the fastening device 12. The fastening device 12 is installed at one end of the protective tube 13, and the other end of the protective tube 13 is connected to one end of the support tube 14. The middle part of the support tube 14 is connected with an anchor plate 15. The anchor plate 15 is provided with a through hole for each cable body 11 to pass through. The through hole is installed with a clamping device 16, and the clamping device 16 is used to clamp the cable body 11 under the pressure of the inner wall of the through hole. The body 11, the end of the support tube 14 close to the protective tube 13 protrudes with a connecting plate 19, the connection between the support tube 14 and the anchor plate 15 is covered by the protective end cover 17, and the end of the anchor plate 15 protruding from the support tube 14 is connected with a clamping plate 18, and the clamping plate 18 presses the clamping device 16 in the anchor plate 15; the overall tensioning tooling of the steel strand inclined cable includes: a tensioning support frame 21, a tensioning rod 22 and a through-core jack 23, one end of the tensioning support frame 21 is connected to the connecting plate 19, the tensioning support frame 21 surrounds the protective end cover 17 and the outside of the support tube 14, the protective end cover 17 is provided with a positioning hole, the positioning hole is for one end of the tensioning rod 22 to extend into, one end of the tensioning rod 22 forms a step, the step is used to be in close contact with the end face of the protective end cover 17, and the outer shell of the through-core jack 23 is installed on the tensioning support frame 21.

[0022] An in-position indicator mechanism 31 is installed on the tension rod 22, and an elastic member 32 is connected between the in-position indicator mechanism 31 and the tension rod 22. The first end of the in-position indicator mechanism 31 is used to be in close contact with the clamping plate 18. A notch is provided at one end of the tension rod 22 away from the protective end cover 17, and the notch is used for the second end of the in-position indicator mechanism 31 to extend into. The elastic member 32 is used to keep the second end of the in-position indicator mechanism 31 away from the notch. By observing whether the in-position indicator mechanism 31 emerges from the notch, it can be observed whether the clamping plate 18 is clamped in place.

[0023] The in-position indicating mechanism 31 is a rod-shaped structure.

[0024] The tension support frame 21 includes: a first support ring 211, a second support ring 212 and an intermediate connecting rib 213. The first support ring 211 is connected to the connecting plate 19 through at least three intermediate connecting ribs 213. The housing of the through-core jack 23 is installed on the second support ring 212. The first support ring 211 realizes the connection with the connecting plate 19, and the second support ring 212 provides an installation foundation for the through-core jack 23.

[0025] A connecting piece is connected to the connecting disk 19 . The connecting piece is connected to the connecting disk 19 by screws. The connecting piece limits the first support ring 211 from being separated from the connecting disk 19 and limits the first support ring 211 from rotating relative to the connecting disk 19 .

[0026] Example 2

[0027] The present invention also discloses a stay cable tensioning process, which is implemented based on the steel strand stay cable integral tensioning tooling as described in Example 1; the stay cable tensioning process comprises the following steps:

[0028] S1. Sleeve the clamping device outside the cable body and place the clamping device in the anchor plate; S2. Sleeve the clamping plate outside the connecting bolt; S3. Connect the tensioning support frame in the overall tensioning tooling of the steel strand inclined cable with the connecting plate; S4. Start the through-hole jack to extend, and the push ring connected to the tensioning rod in the through-hole jack is pressed on the clamping plate, and the clamping plate presses the clamping device in the anchor plate; S5. Start the through-hole jack to retract; S6. Start the through-hole jack to extend, and the tensioning rod of the through-hole jack passes through the protective end cover, and the step on the tensioning rod presses the protective end cover outside the anchor plate; S7. Use an external bolt structure to connect the anchor plate and the protective end cover, or weld the protective end cover to the anchor plate.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. The overall tensioning tooling for the steel strand cable is characterized by: The overall tensioning tooling of the steel strand cable is used for the steel strand cable, and the steel strand cable comprises: a cable body, a fastening device, a protective tube, a support tube, an anchor plate, a clamping device, a protective end cover, a clamping plate and a connecting plate. There are at least three cable bodies, and all the cable bodies are fastened by the fastening device. The fastening device is installed at one end of the protective tube, and the other end of the protective tube is connected to one end of the support tube. An anchor plate is connected and installed in the middle of the support tube. The anchor plate is provided with a through hole for each cable body to pass through. A clamping device is installed in the through hole. The clamping device is used to clamp the cable body under the pressure of the inner wall of the through hole. A connecting plate protrudes from the end of the support tube close to the protective tube. The connection between the support tube and the anchor plate is covered by the protective end cover. The end of the anchor plate protruding from the support tube is connected to a clamping plate, and the clamping plate presses the clamping device into the anchor plate. The overall tensioning tooling of the steel strand inclined cable includes: a tensioning support frame, a tensioning rod and a through-hole jack. One end of the tensioning support frame is connected to the connecting plate. The tensioning support frame surrounds the protective end cover and the outside of the support tube. The protective end cover is provided with a positioning hole for one end of the tensioning rod to extend into. A step is formed at one end of the tensioning rod, and the step is used to be tightly attached to the end face of the protective end cover. The through-hole jack shell is installed on the tensioning support frame.

2. The overall tensioning tool for the steel stranded cable according to claim 1 is characterized in that: An in-place indicator mechanism is installed on the tension rod, and an elastic member is connected between the in-place indicator mechanism and the tension rod. The first end of the in-place indicator mechanism is used to be in close contact with the clamping plate. A notch is provided at the end of the tension rod away from the protective end cover, and the notch is used for the second end of the in-place indicator mechanism to extend into. The elastic member is used to make the second end of the in-place indicator mechanism away from the notch.

3. The overall tensioning tool for the steel stranded cable according to claim 2 is characterized in that: The in-place indication mechanism is a rod-shaped structure.

4. The steel strand cable-stayed cable integral tensioning tool according to claim 1, characterized in that: The tensioning support frame includes: a first support ring, a second support ring and middle connecting ribs. The first support ring is connected to the connecting plate through at least three middle connecting ribs. The second support ring is equipped with a through-hole jack shell.

5. The overall tensioning tool for the steel stranded cable according to claim 4 is characterized in that: A connecting piece is connected to the connecting disk, and the connecting piece is connected to the connecting disk through screws. The connecting piece limits the first supporting ring from being separated from the connecting disk, and limits the first supporting ring from rotating relative to the connecting disk.

6. A stay cable tensioning process, characterized in that: The cable-stayed cable tensioning process is implemented based on the steel strand cable-stayed cable integral tensioning tooling according to any one of claims 1 to 5; the cable-stayed cable tensioning process comprises the following steps: S1. Sleeve the clamping device outside the cable body and place the clamping device in the anchor plate; S2. Sleeve the clamping plate outside the connecting bolt; S3. Connect the tensioning support frame in the overall tensioning tooling of the steel strand inclined cable with the connecting plate; S4. Start the through-hole jack to extend, and the push ring connected to the tensioning rod in the through-hole jack is pressed on the clamping plate, and the clamping plate presses the clamping device in the anchor plate; S5. Start the through-hole jack to retract; S6. Start the through-hole jack to extend, and the tensioning rod of the through-hole jack passes through the protective end cover, and the step on the tensioning rod presses the protective end cover outside the anchor plate; S7. Use an external bolt structure to connect the anchor plate and the protective end cover, or weld the protective end cover to the anchor plate.

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