CN209923796U

CN209923796U - Prestressed carbon fiber tensioning device

Info

Publication number: CN209923796U
Application number: CN201920081580.XU
Authority: CN
Inventors: 韩松; 戴邵雷
Original assignee: SHANGHAI HORSE CONSTRUCTION Co Ltd
Current assignee: SHANGHAI HORSE CONSTRUCTION Co Ltd
Priority date: 2019-01-17
Filing date: 2019-01-17
Publication date: 2020-01-10
Anticipated expiration: 2029-01-17

Abstract

The utility model discloses a prestressed carbon fiber tensioning device, which comprises a fixed end base, a fixed end anchor block, a tensioning cable of carbon fiber, a tensioning end anchor block and a tensioning end base, wherein the fixed end anchor block and the tensioning end anchor block are respectively fixed at two ends of the tensioning cable; the stiff end anchor block with stretch-draw in the end anchor block at least one of the two includes anchorage base and wedge, be provided with the slot on the anchorage base and be used for the wedge inserts, the wedge include with the slot inside wall contact the conical surface and with stretch-draw the contact surface that the cable contacted. Adopt above-mentioned technical scheme, set up the conical surface that contacts with the slot inside wall on the wedge, the middle part of wedge is thicker for the left and right sides on the one hand, and on the other hand conical surface receives the pressure perpendicular to conical surface of slot inside wall to can effectively avoid the wedge middle part hunch-up when receiving the great pressure of anchorage, make the pressure distribution that acts on the guy cable relatively more even, difficult emergence is opened the torn condition of guy cable.

Description

Prestressed carbon fiber tensioning device

Technical Field

The utility model relates to a prestressing force carbon fiber tensioning equipment belongs to bridge concrete prestressing force tensioning equipment technical field.

Background

At present, the bridge mostly adopts a prestressed reinforced concrete structure. The prestressed tension cable is used in a bridge concrete structure reinforcing project, and is generally in the shape of a rectangular thin plate (strip or belt), a cylinder, a quadrangular prism, or the like. For example, in a prestressed carbon fiber tensioning device disclosed in chinese patent application No. 201711174409.5 previously filed by the applicant, both ends of a tensile cable of carbon fibers are clamped and fixed by a tensile end anchor block and a fixed end anchor block, and the tensile end anchor block is pushed by a jack, thereby stretching the tensile cable. Use this structure as an example, open the cable and be the rectangle sheet metal form, as shown in fig. 1, the anchor block includes anchor block and anchor clamps, anchor clamps are two platelike wedge blocks 2, and wedge block 2 is the plane with the contact surface of opening cable 3, are provided with the slot that is used for anchor clamps to wedge on the anchor block, the face that wedges 2 wedge behind the slot and the lateral wall contact of slot is the wedge face, the wedge face also is the plane. And after wedge 2 is wedged in the slot in the use, the pressure of the left and right sides region of slot to the wedge is great, and the pressure of the near region of axis to wedge 2 is less, leads to the regional arch of middle part of wedge 2 easily to make the left and right sides of opening the cable receive enough big clamping-force but the regional atress of middle part is less, the tensile in-process causes the tearing of opening the cable easily.

SUMMERY OF THE UTILITY MODEL

Therefore, an object of the utility model is to provide a prestressing force carbon fiber tensioning equipment can avoid stretching cable to lead to tearing because of the clamping-force inequality that receives.

In order to achieve the above object, the prestressed carbon fiber tensioning device of the present invention comprises a fixed end base, a fixed end anchor block, a carbon fiber tensioning cable, a tensioning end anchor block and a tensioning end base, wherein the fixed end anchor block and the tensioning end anchor block are respectively fixed at two ends of the tensioning cable; the tensioning end anchor block is arranged in a sliding groove of the tensioning end base and can linearly slide in the sliding groove; the tensioning end anchor block is connected to one end of the screw, and the other end of the screw sequentially penetrates through a through hole penetrating through the tensioning end base, the stop nut, the jack baffle and the tensioning nut; one end of the jack is propped against the jack baffle, and the other end of the jack is propped against the stretching end base; the stiff end anchor block with stretch-draw in the end anchor block at least one of the two includes anchorage base and wedge, be provided with the slot on the anchorage base and be used for the wedge inserts, the wedge include with the slot inside wall contact the conical surface and with stretch-draw the contact surface that the cable contacted.

The vertex angle of the conical body where the conical surface is located is 1.6-5 degrees.

When the width of the wedge block is larger, the vertex angle of the conical body where the corresponding conical surface is located is larger.

The stretching cable is in a rectangular thin plate shape, the number of the wedge-shaped blocks is two, and the two wedge-shaped blocks clamp the stretching cable.

The width of the wedge-shaped block is 100 mm-250 mm.

And anti-skid insections are arranged on the contact surface of the wedge-shaped block.

One end of the wedge-shaped block, which is close to the vertex angle of the conical body where the conical surface is located, is an inner side end, and the other end of the wedge-shaped block, which is far away from the vertex angle, is an outer side end; and one side of the contact surface, which is close to the inner side end, is a plane part, and the anti-skid insection is arranged on one side of the contact surface, which is close to the outer side end.

The tooth height of the anti-slip insection has a tendency to gradually decrease in a direction in which the outer end extends toward the inner end.

Adopt above-mentioned technical scheme, the utility model discloses a prestressing force carbon fiber tensioning equipment has set up the conical surface that contacts with the slot inside wall on the wedge, and the middle part of wedge is thicker for the left and right sides on the one hand, and on the other hand conical surface receives the pressure perpendicular to conical surface of slot inside wall to can effectively avoid the wedge middle part to arch up when receiving the great pressure of anchorage, make the pressure distribution that acts on stretching the cable relatively more even, the difficult condition that stretches the cable and tears that takes place.

Drawings

Fig. 1 is a schematic structural diagram of a wedge block in the prior art.

Fig. 2 is a perspective view of the present invention.

Fig. 3 is a front view of the present invention.

Fig. 4 is a bottom view of the present invention.

Fig. 5 is a schematic structural diagram of a wedge block in the present invention.

Fig. 6 is a partially enlarged view of a portion a in fig. 5.

Fig. 7 is a schematic structural view of the tension end anchor of the present invention.

Fig. 8 is a distribution diagram of the extrusion force of the anchor base on the wedge block of the present invention.

Fig. 9 is a schematic perspective view of a cone with a conical surface.

Fig. 10 is a front view of fig. 9.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 2-7, the prestressed carbon fiber tensioning device of the present invention comprises a fixed end base 100, a fixed end anchor block 200, a carbon fiber tensioning cable 3, a tensioning end anchor block 400, and a tensioning end base 500, wherein the fixed end anchor block 200 and the tensioning end anchor block 400 are respectively fixed at two ends of the tensioning cable; the tensioning end anchor block 400 is arranged in the sliding groove 501 of the tensioning end base 500 and can slide linearly in the sliding groove 501; the tensioning end anchor block 400 is connected to one end of a screw 600, the other end of the screw 600 sequentially passes through a through hole penetrating through the tensioning end base 500, a stop nut 700, a jack baffle 800 and a tensioning nut 900, and the stop nut 700 and the tensioning nut 900 are in threaded connection on the screw 600; one end of the jack 801 is fixed on the jack retainer 800, and the other end is fixed on the tensioning end base 500.

The tensioning cable 3 can be stretched by stretching the jack 801, when the jack 801 stretches, the jack baffle 800 is jacked to move, the jack baffle 800 drives the tensioning nut 900 to move, so that the screw 600 and the stop nut 700 are driven to move together, when the stroke of the jack 801 is in place, the stop nut 700 is screwed to be close to and jacked on the tensioning end base 500, then the jack 801 is retracted, so that the jack baffle 800 is driven to reset, and then the tensioning nut 900 is screwed to be close to and jacked on the jack baffle 800, so that a stretching work process is completed.

The stiff end anchor block 200 with at least one of the two in the tensioning end anchor block 400 includes anchor block 1 and wedge 2, be provided with slot 11 on anchor block 1 and be used for wedge 2 inserts, wedge 2 include with the slot 11 inside wall contact the conical surface 21 and with the contact surface 22 that the tensioning cable 3 contacted.

Adopt above-mentioned technical scheme, set up the conical surface 21 that contacts with the 11 inside walls of slot on the wedge 2, on the one hand the middle part of wedge 2 is thicker for the left and right sides, on the other hand conical surface 21 receives the pressure F perpendicular to conical surface 21 of the 11 inside walls of slot, as shown in fig. 8, thereby can effectively avoid wedge 2 middle part hunch-up when receiving the great pressure of anchor block 1, make the pressure distribution that acts on opening cable 3a relatively more even, the difficult tearing condition of cable 3a that opens takes place.

As shown in fig. 9 and 10, the vertex angle α of the conical body 21a where the conical surface 21 is located is 1.6 ° to 5 °.

The width of the wedge block 2 is 100 mm-250 mm, and the vertex angle of the conical body 21a of the corresponding conical surface 21 is larger when the width of the wedge block 2 is larger. And a chamfer is arranged at the edge position of the wedge clamping block 2, and the radius range of the chamfer is 2-10 mm.

The stretching cable 3a is in a rectangular thin plate shape, the number of the wedge blocks 2 is two, and the two wedge blocks 2 clamp the stretching cable 3 a.

As shown in fig. 6, the contact surface 22 of the wedge-shaped block 2 is provided with anti-slip insections 221.

One end of the wedge block 2, which is close to the vertex angle of the conical body 21a where the conical surface 21 is located, is an inner side end 2a, and the other end, which is far away from the vertex angle, is an outer side end 2 b; a flat portion 222 is formed on the contact surface 22 on a side close to the inner end 2a, and the anti-slip serrations 221 are formed on the contact surface 22 on a side close to the outer end 2 b. The length of the flat surface portion 222 is in the range of 1cm to 5 cm. The tooth height of the anti-slip insection 221 has a tendency to gradually decrease in a direction in which the outer end 2b extends toward the inner end 2 a.

Because the wedge-shaped block 2 is stressed by the anchor block 1 at the inner end 2a to the maximum, if the tooth height of the anti-slip insection 221 close to the inner end 2a is higher, the stress is too concentrated to cut the tensile cable 3a of the carbon fiber, and therefore, the side, close to the inner end 2a, on the contact surface 22 is the plane part 222, and the situation that the tensile cable 3a is cut off can be effectively avoided. Further, the tooth height of the anti-slip insection 221 is set to have a tendency to gradually decrease in a direction in which the outer end 2b extends toward the inner end 2a, and this also has an effect of further preventing the tension cable 3a from being cut.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. The utility model provides a prestressing force carbon fiber tensioning equipment which characterized in that: the device comprises a fixed end base, a fixed end anchor block, a carbon fiber tensioning cable, a tensioning end anchor block and a tensioning end base, wherein the fixed end anchor block and the tensioning end anchor block are respectively fixed at two ends of the tensioning cable; the tensioning end anchor block is arranged in a sliding groove of the tensioning end base and can linearly slide in the sliding groove; the tensioning end anchor block is connected to one end of the screw, and the other end of the screw sequentially penetrates through a through hole penetrating through the tensioning end base, the stop nut, the jack baffle and the tensioning nut; one end of the jack is propped against the jack baffle, and the other end of the jack is propped against the stretching end base; the stiff end anchor block with stretch-draw in the end anchor block at least one of the two includes anchorage base and wedge, be provided with the slot on the anchorage base and be used for the wedge inserts, the wedge include with the slot inside wall contact the conical surface and with stretch-draw the contact surface that the cable contacted.

2. The prestressed carbon fiber tension device as claimed in claim 1, wherein the top angle of the conical body on which the conical surface is located is 1.6 ° ~ 5 °.

3. A prestressed carbon fiber tensioning device according to claim 1, wherein: when the width of the wedge block is larger, the vertex angle of the conical body where the corresponding conical surface is located is larger.

4. A prestressed carbon fiber tensioning device according to claim 1, wherein: the stretching cable is in a rectangular thin plate shape, the number of the wedge-shaped blocks is two, and the two wedge-shaped blocks clamp the stretching cable.

5. The prestressed carbon fiber tension device as recited in claim 1, wherein the width of said wedge block is 100mm ~ 250 mm.

6. A prestressed carbon fiber tension device according to any one of claims 1 to 5, wherein: and anti-skid insections are arranged on the contact surface of the wedge-shaped block.

7. A prestressed carbon fiber tensioning device according to claim 6, wherein: one end of the wedge-shaped block, which is close to the vertex angle of the conical body where the conical surface is located, is an inner side end, and the other end of the wedge-shaped block, which is far away from the vertex angle, is an outer side end; and one side of the contact surface, which is close to the inner side end, is a plane part, and the anti-skid insection is arranged on one side of the contact surface, which is close to the outer side end.

8. A prestressed carbon fiber tensioning device according to claim 7, wherein: the tooth height of the anti-slip insection has a tendency to gradually decrease in a direction in which the outer end extends toward the inner end.