Connecting and tensioning device for steel strand

Abstract

The present invention relates to a connecting and tensioning device for steel stranded wires. The connecting and tensioning device is used to connect a first steel stranded wire and a second steel stranded wire to be tensioned. The connecting and tensioning device includes: a base, the base is provided with a through hole for the first steel stranded wire to pass through; a fixing block fixed to the top of the base, a U-shaped groove for the second steel stranded wire to pass through is provided on the side of the fixing block away from the base; the inner wall of the U-shaped groove will not be recessed inward to form a clamping groove; and an anchor member for being installed at the end of the second steel stranded wire and matching with the clamping groove. By clamping the anchor member in the clamping groove, the second steel stranded wire is installed in the U-shaped groove. The present invention effectively solves the problem that it is relatively difficult to simultaneously realize the connection and tensioning of steel stranded wires. On the basis of connecting two adjacent steel stranded wires, it can realize the anchoring and tensioning of steel stranded wires, improve the utilization rate of ultra-high-strength slow-bonded prestressed steel stranded wires, reduce the construction cost, and improve the construction efficiency.

Description

Technical Field

[0001] The present invention relates to the field of building construction, and particularly to a connecting and tensioning device for steel strands. Background Art

[0002] Slow-bonded prestressed steel strands are widely used in the structural construction design of bridges, airports, stadiums, etc. due to their high strength, high toughness, good relaxation performance, etc.

[0003] At present, high-strength slow-bonded prestressed steel strands are widely used and the technology is relatively mature. However, for ultra-high-strength slow-bonded prestressed steel strands above 2000 MPa, there are few related applications. At present, it is difficult to achieve a device that can tension the steel strands on the basis of connecting adjacent two steel strands, and the construction cost is relatively high and the efficiency is relatively low. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art, and provide a connecting and tensioning device for steel strands, which solves the problem that it is relatively difficult to simultaneously realize the connection and tensioning of steel strands. On the basis of connecting adjacent two steel strands, it can realize the anchoring and tensioning of the steel strands, improve the utilization rate of ultra-high-strength slow-bonded prestressed steel strands, reduce the construction cost, and improve the construction efficiency.

[0005] The technical solution for realizing the above purpose is as follows:

[0006] The present invention provides a connecting and tensioning device for steel strands. The connecting and tensioning device is used to connect a first steel strand and a second steel strand to be tensioned. The connecting and tensioning device includes:

[0007] A base, the base is provided with a through hole for the first steel strand to pass through;

[0008] A fixing block fixed on the top of the base. A U-shaped groove for the second steel strand to pass through is provided on the side of the fixing block away from the base;

[0009] The inner wall of the U-shaped groove will not be recessed inward to form a clamping groove; and

[0010] An anchor member to be installed at the end of the second steel strand and matching with the clamping groove. The second steel strand is installed in the U-shaped groove by clamping the anchor member in the clamping groove.

[0011] The connecting and tensioning device for steel strand of the present invention enables the first steel strand to pass through the through hole, so as to fixedly connect the first steel strand with the base, and then fixes the end anchor of the second steel strand, and then inserts the anchor into the clamping groove, and then uses a jack to tension the second steel strand, so that the second steel strand is fixed in the U-shaped groove after tensioning, thereby fixedly connecting the first steel strand and the second steel strand, solving the problem that it is relatively difficult to simultaneously realize the connection and tensioning of steel strands. On the basis of connecting two adjacent steel strands, it can realize the anchoring and tensioning of steel strands, improve the utilization rate of ultra-high-strength and slow-bonding prestressed steel strands, reduce the construction cost, and improve the construction efficiency.

[0012] A further improvement of the connecting and tensioning device for steel strand of the present invention lies in that the U-shaped groove includes a first groove section far from the second steel strand and a second groove section close to the second steel strand, and the width of the first groove section is greater than that of the second groove section;

[0013] The clamping groove is opened in the second groove section, and an opening communicating with the first groove section is formed at one end of the clamping groove. The anchor is inserted into the clamping groove from the opening to be connected with the fixing block.

[0014] A further improvement of the connecting and tensioning device for steel strand of the present invention lies in that the width of the second groove section matches the diameter of the second steel strand.

[0015] A further improvement of the connecting and tensioning device for steel strand of the present invention lies in that the width of the clamping groove is greater than that of the second groove section, thereby preventing the anchor from slipping out of the notch of the U-shaped groove.

[0016] A further improvement of the connecting and tensioning device for steel strand of the present invention lies in that the anchor includes a sleeve for sleeving on the second steel strand and a plurality of clamping pieces arranged at intervals and inserted between the sleeve and the second steel strand. The clamping pieces are wedge-shaped, and by inserting a plurality of clamping pieces between the sleeve and the second steel strand, the second steel strand is clamped in the sleeve.

[0017] A further improvement of the connecting and tensioning device for steel strand of the present invention lies in that the clamping pieces are inserted into the end of the sleeve close to the first groove section.

[0018] A further improvement of the connecting and tensioning device for steel strand of the present invention lies in that it further includes a spiral reinforcement for sleeving on the first steel strand and the second steel strand.

[0019] A further improvement of the connecting and tensioning device for steel strand of the present invention lies in that it further includes an extrusion anchor for fixedly sleeving on the first steel strand. The first steel strand passes through the through hole, and then the extrusion anchor is fixed at the end of the first steel strand passing through the base to connect the first steel strand and the base.

[0020] A further improvement of the connecting and tensioning device for steel strand of the present invention lies in that the diameter of the extrusion anchor is greater than the diameter of the through hole.

[0021] A further improvement of the connecting and tensioning device for steel strand of the present invention lies in that it further includes a support plate vertically fixed to the bottom of the base, for placing on the top of the steel bar below the first steel strand. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. is a schematic diagram of the use state of the connecting and tensioning device for steel strand of the present invention.

[0023] Figure 2 FIG. is a three-dimensional exploded view of the connecting and tensioning device for steel strand of the present invention.

[0024] Figure 3 FIG. is a top exploded view of the connecting and tensioning device for steel strand of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0026] Refer to Figure 1 , the present invention provides a connecting and tensioning device for steel strand. By passing the first steel strand through the through hole, the first steel strand is fixedly connected to the base. Then, the end fixing anchor of the second steel strand is fixed, and then the anchor is inserted into the clamping groove. Then, a jack is used to tension the second steel strand, so that the second steel strand is fixed in the U-shaped groove after tensioning, thereby fixedly connecting the first steel strand and the second steel strand, solving the problem that it is relatively difficult to simultaneously realize the connection and tension of the steel strand. On the basis of connecting two adjacent steel strands, the anchoring and tensioning of the steel strand can be realized, improving the utilization rate of ultra-high-strength slow-bonded prestressed steel strand, reducing the construction cost, and improving the construction efficiency. The connecting and tensioning device for steel strand of the present invention will be described below in conjunction with the drawings.

[0027] Refer to Figure 1 , Figure 1 FIG. is a schematic diagram of the use state of the connecting and tensioning device for steel strand of the present invention. The following will be described in conjunction with Figure 1 , the connecting and tensioning device for steel strand of the present invention will be described.

[0028] As Figures 1 to 3 shown, the connecting and tensioning device for steel strand of the present invention is used to connect and tension the first steel strand 21 and the second steel strand 22 to be tensioned. The connecting and tensioning device includes:

[0029] A base 11, the base 11 is provided with a through hole 112 for the first steel strand 21 to pass through;

[0030] A fixing block 12 fixed to the top of the base 11, a U-shaped groove 121 for the second steel strand 22 to pass through is provided on the side of the fixing block 12 away from the base 11;

[0031] The inner wall of the U-shaped groove 121 may be recessed inward to form a clamping groove 122; and

[0032] An anchor member for being installed at the end of the second steel strand 22 and matching with the clamping groove 122 is clamped in the clamping groove 122 through the anchor member, so that the second steel strand 22 is installed in the U-shaped groove 121.

[0033] Specifically, it further includes a spiral rib 15 for sleeving on the first steel strand 21 and the second steel strand 22.

[0034] As a preferred embodiment of the present invention, the U-shaped groove 121 includes a first groove section 1211 away from the second steel strand 22 and a second groove section 1212 close to the second steel strand 22, and the width of the first groove section 1211 is greater than the width of the second groove section 1212;

[0035] The clamping groove 122 is opened in the second groove section 12112, and an opening communicating with the first groove section 1211 is formed at one end of the clamping groove 122. The anchor member is inserted into the clamping groove 122 from the opening to be connected with the fixing block 12.

[0036] Specifically, the width of the second groove section 1212 matches the diameter of the second steel strand 22.

[0037] Preferably, the width of the clamping groove 122 is greater than the width of the second groove section 1212, so as to prevent the anchor member from slipping out of the notch of the U-shaped groove 121.

[0038] Further, the anchor member includes a sleeve 13 for sleeving on the second steel strand 22 and a plurality of clamping pieces 131 arranged at intervals and for being inserted between the sleeve 13 and the second steel strand 22. The clamping pieces 131 are wedge-shaped, and the second steel strand 22 is clamped in the sleeve 13 by inserting the plurality of clamping pieces 131 between the sleeve 13 and the second steel strand 22.

[0039] Preferably, the clamping pieces 131 are inserted at the end of the sleeve 13 close to the first groove section 1211.

[0040] Further, it further includes an extrusion anchor 14 for fixedly sleeving on the first steel strand 21. The first steel strand 21 passes through the through hole 112, and then the extrusion anchor 14 is fixed at the end of the first steel strand 21 passing through the base 11 to connect the first steel strand 21 and the base 11.

[0041] Specifically, the diameter of the extrusion anchor 14 is greater than the diameter of the through hole 112.

[0042] Preferably, it further includes a support plate 111 vertically fixed at the bottom of the base 11 for placing the top of the steel bar below the first steel strand 21.

[0043] The specific implementation method of the present invention is as follows:

[0044] Install an extrusion anchor 14 at the end of the first steel strand 21, pass the first steel strand 21 through the through hole 112 of the base 11, and make the extrusion anchor 14 abut against the end of the base 11, so as to prevent the first steel strand 21 from slipping out of the through hole 112, and sleeved with a spiral reinforcement 15 on the part of the first steel strand 21 exposed from the base 11;

[0045] Sleeve a sleeve 13 at the end of the second steel strand 21, insert a wedge 131 between the sleeve 13 and the second steel strand 22, then snap the second steel strand 22 into the U-shaped groove 121, and insert the sleeve 13 into the clamping groove 122 from the opening of the clamping groove 122, so that the second steel strand 22 will not slip outwards from the notch of the U-shaped groove 121, and sleeved with a spiral reinforcement 15 on the part of the second steel strand 22 exposed from the fixing block 12. At this time, the first steel strand 21 and the second steel strand 22 are connected;

[0046] Place the support plate 111 on the top of the steel bars below the first steel strand 21, and pour concrete so that the first steel strand 21 and the second steel strand 22 are embedded in the concrete, and part of the tensioning end of the second steel strand 22 and the fixing block 12 are exposed outwards. Use a jack to tension the tensioning end of the second steel strand 22. After tensioning, the wedge 131 and the sleeve 13 fix the second steel strand 22. At this time, the tensioning of the second steel strand 22 is achieved;

[0047] Cut off the redundant part of the second steel strand 22 extending out of the fixing block 12, and then fill the concrete at the position corresponding to the second steel strand 22, so that the second steel strand 22 and the fixing block 12 are both embedded in the concrete.

[0048] The present invention has been described in detail with reference to the embodiments in the accompanying drawings. Those of ordinary skill in the art can make various variations of the present invention according to the above description. Therefore, some details in the embodiments should not constitute a limitation to the present invention, and the protection scope of the present invention will be defined by the scope of the appended claims.

Claims

1. A connecting and tensioning device for steel strand wires, characterized in that The connecting and tensioning device is used to connect the first steel strand and the second steel strand to be tensioned. The connecting and tensioning device includes: A base, and a through hole for the first steel strand to pass through is formed in the base; A fixing block fixed on the top of the base, and a U-shaped groove for the second steel strand to pass through is formed in the side of the fixing block away from the base; Part of the inner wall of the U-shaped groove is recessed inward to form a clamping groove; and An anchor member to be installed at the end of the second steel strand and matching with the clamping groove. The second steel strand is installed in the U-shaped groove by clamping the anchor member in the clamping groove; The U-shaped groove includes a first groove section away from the second steel strand and a second groove section close to the second steel strand, and the width of the first groove section is greater than that of the second groove section; The clamping groove is formed in the second groove section, and an opening communicating with the first groove section is formed at one end of the clamping groove. The anchor member is inserted into the clamping groove from the opening to be connected with the fixing block; The anchor member includes a sleeve for sleeving on the second steel strand and a plurality of clamping pieces arranged at intervals and inserted between the sleeve and the second steel strand. The clamping pieces are wedge-shaped, and the second steel strand is clamped in the sleeve by inserting the plurality of clamping pieces between the sleeve and the second steel strand.

2. The connecting and tensioning device for steel stranded wires according to claim 1, characterized in that The width of the second groove section matches the diameter of the second steel strand.

3. The connecting and tensioning device for steel strand according to claim 1, characterized in that, The width of the clamping groove is greater than that of the second groove section, so as to prevent the anchor member from slipping out of the notch of the U-shaped groove.

4. The connecting and tensioning device for steel stranded wires according to claim 1, characterized in that, The clamping pieces are inserted into the end of the sleeve close to the first groove section.

5. The connecting and tensioning device for steel stranded wires according to claim 1, characterized in that, It further includes a spiral rib for sleeving on the first steel strand and the second steel strand.

6. The connecting and tensioning device for steel stranded wires according to claim 1, characterized in that, It further includes an extrusion anchor for fixedly sleeving on the first steel strand. The first steel strand passes through the through hole, and then the extrusion anchor is fixed at the end of the first steel strand passing through the base to connect the first steel strand and the base.

7. The connecting and tensioning device for steel strand according to claim 6, wherein, The diameter of the extrusion anchor is greater than that of the through hole.

8. The connecting and tensioning device for steel stranded wires according to claim 1, wherein, It further includes a support plate vertically fixed at the bottom of the base, for placing the top of the steel bar under the first steel strand.

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