Counter-force sleeve for withdrawing prestressed tendon of clamping piece type anchorage device

Abstract

The utility model relates to the technical field of clamping piece type anchorage device anchor withdrawing, and discloses a counter-force sleeve for clamping piece type anchorage device prestressed tendon anchor withdrawing, which comprises a base, a sleeve is fixedly arranged at the upper end of the middle position of the base, the lower end of the sleeve penetrates through the base and is flush with the base, and the clamping piece type anchorage device prestressed tendon anchor withdrawing counter-force sleeve is arranged on the base. Two ejector pins are fixedly mounted at the bottom end of the inner wall of the sleeve, hydraulic cylinders A are fixedly mounted at the left end and the right end of the upper surface of the base, a lifting mechanism is arranged above the sleeve above the base, and the output ends of the two hydraulic cylinders A are connected with the lifting mechanism; according to the counter-force sleeve for withdrawing the prestressed tendon of the clamping piece type anchorage device, through the arrangement of the sleeve and the ejector pin, after a steel strand is pulled out, the clamping piece on the steel strand can be matched with the ejector pin to be limited by the ejector pin, so that after the steel strand retracts, the clamping piece can be automatically taken out, the position of the clamping piece does not need to be manually intervened, and danger is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of the clamping piece type anchor device retreat anchor, concretely is a kind of clamping piece type anchor device prestressed tendon retreat anchor with counterforce sleeve. BACKGROUND

[0002] After clamping piece type anchor device tensioning, if want to retreat anchor, traditional method is: one method directly cuts with oxygen cutting and retreats anchor, this method is extremely dangerous, when steel strand is cut off, clamping piece will fly out, easy to injure operator;Another method is to add a hollow sleeve, support around the corner, after steel strand is pulled out, clamping piece is picked out by finger or other stick, this method is safer than the first kind, but still there is construction risk, and inconvenient operation. SUMMARY

[0003] (One) technical problem solved

[0004] In view of the deficiencies of prior art, the utility model provides a kind of clamping piece type anchor device prestressed tendon retreat anchor with counterforce sleeve, with the advantages of automatically taking out clamping piece, prevent clamping piece from injuring, solve the problem that existing manual extraction clamping piece, easy to cause security risk.

[0005] (Two) technical scheme

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of clamping piece type anchor device prestressed tendon retreat anchor with counterforce sleeve, including base, the upper end of the middle position of base is fixedly installed with sleeve, the lower end of sleeve penetrates base and is flush with it, two thimbles are fixedly installed on the inner wall bottom end of sleeve, the upper surface of base is fixedly installed with hydraulic cylinder A at left and right ends, the above of base is provided with lifting mechanism above sleeve, the output of two hydraulic cylinder A is connected with lifting mechanism.

[0007] In some embodiments, the lifting mechanism includes a housing, two semicircular sleeves are provided in the housing, the semicircular sleeves slide left and right relative to the housing, hydraulic cylinder B is fixedly installed at the left and right ends of the housing, and the output ends of the hydraulic cylinder B are respectively hinged to the side walls of the corresponding semicircular sleeves.

[0008] In some embodiments, the inner wall of the semicircular sleeve is a conical structure, the inner walls of the two semicircular sleeves are close to each other at the lower ends, and a ratchet ring is formed on the inner wall of the semicircular sleeve.

[0009] In some embodiments, the housing is provided with two groups of slide rods distributed in front and back, and the front and back ends of the two semicircular sleeves are respectively penetrated by the two groups of slide rods and slide relative to the slide rods.

[0010] In some embodiments, a circular hole is formed in the housing and communicates with the interior of the housing, and the circular hole corresponds to the semicircular sleeve.

[0011] In some embodiments, the front and rear ends of the shell are fixedly installed with pull rods, and the upper ends of the pull rods are fixed with the output ends of the hydraulic cylinder A.

[0012] In some embodiments, the upper ends of the pull rods are fixedly installed with V-shaped rods, and the V-shaped rods are connected with the output shafts of the hydraulic cylinder A.

[0013] In some embodiments, the upper ends of the top pins gradually move away from the sleeve, the bottom ends of the top pins are fixed with the inner wall of the sleeve, the two top pins are symmetrically arranged, and the top pin is elastic.

[0014] (Three) beneficial effects

[0015] Compared with the prior art, the utility model provides a clamping piece type anchor device prestressed tendon retreat anchor uses counterforce sleeve, has the following beneficial effects:

[0016] 1、 this clamping piece type anchor device prestressed tendon retreat anchor uses counterforce sleeve, through setting up sleeve and top pin, when the steel strand is pulled out after, the clamping piece on it can be cooperated with top pin and be limited by top pin, thereby after the steel strand retraction, the clamping piece can be automatically taken out, thereby the position of clamping piece does not need manual intervention, and danger is avoided.

[0017] 2、 this clamping piece type anchor device prestressed tendon retreat anchor uses counterforce sleeve, through setting up lifting mechanism, lifting mechanism can firmly fix one end of steel strand, and is suitable for different specifications of steel strand. DRAWINGS

[0018] Figure 1 It is the structure schematic diagram of the utility model;

[0019] Figure 2 It is the structure sectional view of the utility model;

[0020] Figure 3 It is another side sectional view of the structure of the utility model;

[0021] Figure 4 It is the structure schematic diagram of the lifting mechanism of the utility model.

[0022] In the drawing: 1, base;2, sleeve;3, top pin;4, hydraulic cylinder A;5, lifting mechanism;6, shell;7, semicircular sleeve;8, hydraulic cylinder B;9, ratchet ring;10, sliding rod;11, round hole;12, pull rod;13, V-shaped rod. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort should fall within the scope of the present application.

[0024] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0025] In the present application, unless specifically defined and limited otherwise, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless specifically defined otherwise. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present application.

[0027] In the related art, after the steel strand is pulled out, the clamping piece is picked out by fingers or other sticks, which is very dangerous.

[0028] In order to solve the problems in the related art to some extent, the present application provides a clamping piece type anchor prestressed tendon anchor withdrawal reaction force sleeve. When it is needed to be used, the device is only placed at the anchor withdrawal position, the steel strand is passed through the sleeve 2 and the two semicircular sleeves 7, the semicircular sleeves 7 are clamped on the steel strand when the hydraulic cylinders B8 are stretched together, the steel strand is thus firmly fixed, then the lifting mechanism 5 moves up under the driving of the hydraulic cylinder A4, at this time the steel strand can be pulled out a certain distance, the sleeve 2 is stationary, and the clamping piece can be moved to the position of the two ejectors 3 when the steel strand is pulled out, the ejectors 3 can cooperate with the clamping groove position of the clamping piece, so as to fix the clamping piece, and when the steel strand is retracted, the clamping piece can be taken out.

[0029] The present application will be described below in combination with the drawings and with reference to specific embodiments:

[0030] In combination Figures 1-4The embodiment of the application provides a counterforce sleeve for prestressed steel strand unanchoring of a clamping piece type anchorage device, which comprises a base 1, a sleeve 2 fixedly installed at the upper middle position of the base 1, the lower end of the sleeve 2 penetrating through the base 1 and being flush with the base 1, two thimbles 3 fixedly installed at the inner wall bottom end of the sleeve 2, hydraulic cylinders A 4 fixedly installed at the upper surfaces of the left and right ends of the base 1, a lifting mechanism 5 provided above the sleeve 2, and the output ends of the two hydraulic cylinders A 4 being connected with the lifting mechanism 5.

[0031] In the embodiment, the bottom of the base 1 is a rough structure, which is mainly used for contacting with the anchorage device and plays a supporting role, and the structure of the thimble 3 can be matched with the existing clamping piece and can be clamped into the arc-shaped groove on the clamping piece.

[0032] In some embodiments, the lifting mechanism 5 comprises a shell 6, two semicircular sleeves 7 are arranged in the shell 6, the semicircular sleeves 7 slide left and right relative to the shell 6, hydraulic cylinders B 8 are fixedly installed at the left and right ends of the shell 6, and the output ends of the hydraulic cylinders B 8 are respectively hinged to the side walls of the corresponding semicircular sleeves 7.

[0033] Specifically, the hydraulic cylinders B 8 are mainly used for folding or stretching the two semicircular sleeves 7, and the end of the steel strand can be fixed after being folded.

[0034] In some embodiments, the inner wall of the semicircular sleeve 7 is a conical structure, the inner walls of the two semicircular sleeves 7 are close to each other at the lower ends, and a ratchet ring 9 is arranged on the inner wall of each semicircular sleeve 7.

[0035] Specifically, the internal structure of the semicircular sleeve 7 can firmly fix the steel strand, and the ratchet ring 9 can increase the friction between the steel strand.

[0036] In some embodiments, the shell 6 is provided with two groups of slide rods 10 distributed in front and back, and the front and back ends of the two semicircular sleeves 7 are respectively penetrated by the two groups of slide rods 10 and slide relative to the slide rods 10.

[0037] Specifically, the main function is to limit the transverse movement of the semicircular sleeve 7, so as to prevent the problem of deviation caused by the extrusion force of the hydraulic cylinder B 8 or the friction force of the steel strand.

[0038] In some embodiments, circular holes 11 are arranged on the upper and lower ends of the shell 6 and are in communication with the interiors of the shell 6, and the circular holes 11 correspond to the semicircular sleeves 7.

[0039] Specifically, the circular holes 11 are mainly used for the insertion of the steel strand.

[0040] In some embodiments, pull rods 12 are fixedly installed at the front and back ends of the shell 6, and the upper ends of the pull rods 12 are fixed with the output ends of the hydraulic cylinders A 4.

[0041] In some embodiments, V-shaped rods 13 are fixedly installed at the upper ends of the pull rods 12, and the V-shaped rods 13 are connected with the output shafts of the hydraulic cylinders A 4.

[0042] Specifically, the V-shaped rod 13 mainly plays an extending role, so that the forces of the two hydraulic cylinders A4 can act on the shell 6 together.

[0043] In some embodiments, the upper end of the thimble 3 gradually moves away from the sleeve 2, the bottom end of the thimble 3 is fixed to the inner wall of the sleeve 2, the two thimbles 3 are symmetrically arranged, and the thimble 3 is elastic.

[0044] Specifically, the thimble 3 is made of sheet steel, has a certain strength, has a certain elasticity, and is firmly welded to the cylinder wall.

[0045] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means 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 application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0046] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary technical personnel in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, also not within the scope of protection required by the present application.

[0047] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations of the embodiments can be made without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A reaction sleeve for de-anchoring of a prestressed tendon of a wedge-type anchorage, characterized in that: The utility model relates to a kind of hydraulic cylinder lifting mechanism, including base (1), the upper end of the middle position of base (1) is fixedly installed with sleeve (2), the lower end of sleeve (2) is through base (1) and flush with it, the inner wall bottom end of sleeve (2) is fixedly installed with two thimbles (3), the upper surface of base (1) left and right ends is fixedly installed with hydraulic cylinder A (4), the upper of base (1) is above sleeve (2) and is equipped with pull mechanism (5), the output of two hydraulic cylinder A (4) is connected with pull mechanism (5).

2. The reaction sleeve for de-anchoring of the prestressed tendon of the clip-type anchorage according to claim 1, characterized in that: The pull mechanism (5) includes a housing (6), two semicircular sleeves (7) are provided in the housing (6), the semicircular sleeves (7) slide left and right relative to the housing (6), hydraulic cylinder B (8) is fixedly installed at the left and right ends of the housing (6), and the output ends of the hydraulic cylinder B (8) are respectively hinged to the side walls of the corresponding semicircular sleeves (7).

3. The reaction sleeve for de-anchoring of the prestressed tendon of the clip-type anchorage according to claim 2, characterized in that: The inner wall of the semicircular sleeve (7) is a conical structure, the inner walls of the two semicircular sleeves (7) are close to each other at the lower ends, and a ratchet ring (9) is formed in the inner wall of the semicircular sleeve (7).

4. The reaction sleeve for de-anchoring of the prestressed tendon of the clip-type anchorage according to claim 2, characterized in that: The housing (6) is provided with two groups of slide rods (10) distributed in front and back, and the front and rear ends of the two semicircular sleeves (7) are respectively penetrated by the two groups of slide rods (10) and slide relative to the slide rods (10).

5. The reaction sleeve for de-anchoring of the prestressed tendon of the clip-type anchorage according to claim 2, characterized in that: The housing (6) is provided with a circular hole (11) that communicates with the inside of the housing (6) above and below, and the circular hole (11) corresponds to the semicircular sleeve (7).

6. The reaction sleeve for de-anchoring of the prestressed tendon of the clip-type anchorage according to claim 2, characterized in that: The front and rear ends of the housing (6) are fixedly installed with pull rods (12), and the upper ends of the pull rods (12) are fixed to the output ends of the hydraulic cylinder A (4).

7. The reaction sleeve for de-anchoring of the prestressed tendon of the clip-type anchorage according to claim 6, characterized in that: The upper ends of the pull rods (12) are fixedly installed with V-shaped rods (13), and the V-shaped rods (13) are connected to the output shafts of the hydraulic cylinder A (4).

8. The reaction sleeve for de-anchoring of a prestressed tendon of a clip-type anchorage according to claim 1, characterized in that: The upper ends of the thimbles (3) gradually move away from the sleeve (2), the bottom ends of the thimbles (3) are fixed to the inner wall of the sleeve (2), the two thimbles (3) are symmetrically arranged, and the thimbles (3) are elastic.

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