A through-type jack anchor removal device

Abstract

The present invention discloses a through-type jack anchor removal device, which relates to the technical field of anchor removal operations in bridge prestressed tensioning projects, including a jack, wherein a working anchor plate is installed at the rear end of the jack. The through-type jack anchor removal device improves the gripping strength of the anchor removal auxiliary cylinder on the prestressed steel strand, prevents the prestressed steel strand from being de-threaded or slipped, and can temporarily brake the prestressed steel strand in the anchor removal auxiliary cylinder, so that the telescopic oil cylinder can be extended again after returning, and can perform secondary tensioning on the prestressed steel strand, thereby increasing the limit range of the telescopic oil cylinder for single tensioning, and preventing the prestressed steel strand from being partially retracted after being tensioned for the first time. It can adapt to positioning and clamping according to the different materials, different contact surfaces and different friction coefficients of the prestressed steel strand, provide three-layer blocking protection for the prestressed steel strand, ensure safe anchor removal, save re-tensioning time, and can directly remove anchors on site and operate continuously.

Description

Technical Field

[0001] The invention relates to the technical field of anchor withdrawal operations in bridge prestressed tensioning engineering, in particular to a through-type jack anchor withdrawal device. Background Art

[0002] Through-type jacks are mainly used for overall tensioning of group anchors. The jacks are simple to operate, have reliable performance, and save steel strands to the greatest extent. Jacks are mainly used in conjunction with prestressed anchors and tensioning equipment in bridge and other engineering construction, high-rise large-span buildings, large bridges, foundation pit support, etc. Prestressing is generally set, and then through-type jacks are used for tensioning operations. However, during the tensioning operation, unexpected situations such as broken wires, slipped wires, or damaged clips are inevitable. It is necessary to withdraw the anchor and then re-tension. Not only can continuous operation not be achieved, but a professional anchor withdrawer is also required to withdraw the anchor and interrupt the operation. Summary of the Invention

[0003] To achieve the above objectives, the present invention is implemented through the following technical solutions: a through-type jack anchor removal device, comprising a jack, a working anchor plate 1 being installed at the rear end of the jack and arranged facing the side of the concrete surface, a telescopic oil cylinder being installed at the end of the jack away from the working anchor plate 1 and being telescopically installed with the jack, a working anchor plate 2 being installed at the end of the telescopic oil cylinder away from the jack, seven prestressed steel strands being installed inside the working anchor plate 2, and the seven prestressed steel strands being sequentially inserted through the working anchor plate 2 and the working anchor plate 1 and inserted into the concrete surface;

[0004] An anchor withdrawal auxiliary frame, which is assembled between the jack and the working anchor plate, and is used to guide the prestressed steel strand. The anchor withdrawal auxiliary frame includes a rear steel plate, and the front steel plate is installed in parallel at one end of the rear steel plate close to the jack. Thick-walled steel pipes are fixedly connected between the rear steel plate and the front steel plate, and are arranged in a circular array. The surfaces of the rear steel plate and the front steel plate are both perforated corresponding to the prestressed steel strands.

[0005] Anchor-removal auxiliary support legs, which are assembled on the rear steel plate and used to fix the rear steel plate on the concrete surface;

[0006] Anchor withdrawal auxiliary tightening piece, which is assembled on the front steel plate and is used to limit the telescopic rod;

[0007] The anchor withdrawal auxiliary fixing cylinder is assembled between the rear steel plate and the front steel plate and is used to squeeze and limit the prestressed steel strands.

[0008] Preferably, a clip is installed in the interior of the working anchor plate one and at the part where the prestressed steel strand passes through, and the contracted end is inserted into the interior of the working anchor plate one, and the flared end is installed at the end away from the jack. A double-headed jacket is installed at the part where the prestressed steel strand passes through the working anchor plate two, and the double-headed jacket as a whole is composed of two symmetrically connected vertebral jackets, with the middle part contracted and the two ends flared.

[0009] Preferably, the outer surface side of the rear steel plate is fixedly connected to the rear hinge head in a circular array, the side of the front steel plate facing the rear steel plate is fixedly connected to the front hinge head in a circular array, and the outer surface side of the front steel plate is fixedly connected to the vertical plate in a circular array, and the front hinge head and the vertical plate are correspondingly arranged on the front steel plate.

[0010] Preferably, the anchor withdrawal auxiliary support leg includes a telescopic rod, the end of the telescopic rod close to the front steel plate is hinged to a pressure rod, the middle part of the telescopic rod is hinged to a connecting hinge rod, the end of the telescopic rod away from the pressure rod is hinged to an installation anchor plate, the connecting hinge rod is hinged to the rear steel plate through a rear hinge head, and the installation anchor plate is fixed to the concrete surface by bolts.

[0011] Preferably, the anchor withdrawal auxiliary tightening part includes a clamping plate, and the end of the clamping plate away from the telescopic rod is hinged to the front steel plate through a front hinge head, a guide rod is fixedly installed in the middle of the side of the clamping plate facing the telescopic rod, and the free end is exposed outside the free end of the clamping plate, and the free end side of the guide rod is chamfered, and the side of the clamping plate away from the telescopic rod is provided with card slots at equal intervals, a guide plate is installed between the clamping plate and the vertical plate, and one end is inserted in the middle of the vertical plate, and the other end is clamped to the clamping plate through the card slot.

[0012] Preferably, the anchor withdrawal auxiliary cylinder includes a steel sleeve column, and is wrapped on the prestressed steel strand located in the middle of the rear steel plate. The outer surface of the steel sleeve column is fixedly connected to three main base half-cylinders in a circular array, and the outer surface of the steel sleeve column is fixedly connected to three auxiliary half-cylinder seats in a circular array. The main base half-cylinders and the auxiliary half-cylinder seats are alternately installed on the steel sleeve column, wherein the main base half-cylinder is assembled with a main base cover cylinder on the side facing away from the steel sleeve column.

[0013] Preferably, the auxiliary half-cylinder seat is assembled with an auxiliary half-cover cylinder on the side facing away from the steel sleeve column, and has the same structure as the main base cover cylinder. The inner wall surfaces of the main base half-cylinder, the auxiliary half-cylinder seat, the main base cover cylinder and the auxiliary half-cover cylinder are all fixedly connected with inner convex strips, and are all arranged close to one end of the rear steel plate. A steel binding belt is installed through the interior of the main base half-cylinder and is arranged away from one end of the rear steel plate, and a locking plate is installed in the middle of the steel binding belt, which can limit the telescopic length of the steel binding belt.

[0014] Preferably, a circular array of tightening rings is installed on the inner side of the steel sleeve column, and the diagonally opposite edges of the two end edges are chamfered, which can facilitate the contacting edges to contact and overlap with each other when the two tightening rings are squeezed in the steel sleeve column. There are six tightening rings in number, which are evenly distributed on the inner side of the steel sleeve column and close to one end of the rear steel plate. A straightening rod is fixedly connected to the middle of one side of the tightening ring that is close to the inner wall of the steel sleeve column.

[0015] Preferably, the straightening rod is fixedly connected to a semi-steel contact ring at one end away from the tightening ring, and is installed as a whole inside the main base semi-cylinder, with its top exposed at the upper part of the outer wall of the main base semi-cylinder and inserted into the bottom of the main base cover cylinder, and the main base cover cylinder is installed in combination with the main base semi-cylinder through a steel strap and a locking plate, and the straightening rod passes through the main base semi-cylinder and the steel sleeve column and is inserted into the inner side of the steel sleeve column.

[0016] Preferably, the clamping ring, the straightening rod and the semi-steel contact ring together constitute a clamping part, and a clamping part is also installed inside the auxiliary semi-cylinder seat to prevent the prestressed steel strands on the inner side of the steel sleeve from slipping off. The end of the pressure rod away from the telescopic rod is hinged to the main base cover tube. Similarly, the auxiliary semi-cylinder seat is hinged to its corresponding pressure rod, and the clamping plate is slidably installed with the telescopic rod through the guide rod, and a guide rod cavity is provided on the contact surface of the telescopic rod and the guide rod, so that the guide rod can slide on the telescopic rod along the guide rod cavity, wherein the hinged part of the telescopic rod and the pressure rod, the hinged part of the pressure rod and the main base cover tube, and the hinged part of the clamping plate and the front hinge head are all connected with hexagonal rods, which can insert and position the above three hinged parts.

[0017] The present invention provides a through-type jack anchor removal device, which has the following beneficial effects:

[0018] 1. The through-type jack anchor removal device fixes six mounting anchor plates in a circular array on the concrete surface in advance with the help of six bolts and nuts, and then the prestressed steel strands protruding from the concrete surface are sequentially passed through the working anchor plate 1, the anchor removal auxiliary frame, the jack, the telescopic oil cylinder and the working anchor plate 2, and exposed from the front end of the working anchor plate 2. During the process of passing the prestressed steel strands, the clips are pre-installed on the working anchor plate 1 so that the flared end of the clips faces the working anchor plate 1, and the double-headed jacket is pre-installed in the working anchor plate 2 as a whole. During the process of the prestressed steel strands passing through the inner side of the anchor removal auxiliary frame, ensure that each prestressed steel strand passes between the corresponding main base half-cylinder and the main base cover cylinder, between the auxiliary half-cylinder seat and the auxiliary half-cover cylinder, and through the inner middle part of the steel sleeve column. Start the jack to drive the telescopic oil cylinder to push the working anchor plate 2 forward to tension the prestressed steel strands.

[0019] 2. The through-type jack anchor removal device tightens the steel strap, locks the locking plate, and then extends the telescopic rod. Under the guidance of the guide rod and the downward pressure guidance of the compression plate whose angle is locked, the main base cover cylinder and the auxiliary half-cover cylinder are driven to squeeze their corresponding prestressed steel strands respectively. Not only can the inner convex strips be used to increase the pressure area of the contact between the anchor removal auxiliary fixing cylinder and the prestressed steel strand surface, but also the prestressed steel strand can be effectively prevented from slipping between the main base half cylinder and the main base cover cylinder, avoiding the prestressed steel strand from slipping between the auxiliary half-cylinder seat and the auxiliary half-cover cylinder, improving the gripping strength of the anchor removal auxiliary fixing cylinder on the prestressed steel strand, effectively preventing the prestressed steel strand from being debonded or slipping, and temporarily braking the prestressed steel strand in the anchor removal auxiliary fixing cylinder, so that the telescopic oil cylinder can be extended again after returning, and the prestressed steel strand can be tensioned for the second time, thereby improving the limit range of single tensioning of the telescopic oil cylinder.

[0020] 3. The through-type jack anchor removal device, during the extension of the telescopic rod, applies pressure to the top of the main base cover tube and the auxiliary half-cover tube through the pressure rod, so that the semi-steel contact ring inserted in the main base cover tube and the auxiliary half-cover tube is pressed into the steel sleeve column, and the tightening ring is further squeezed into the steel sleeve column by means of the straightening rod, and the bevel edges between each two adjacent tightening rings are chamfered, so that the corners between the two adjacent tightening rings can be further superimposed and overlapped, thereby ensuring that the position of the prestressed steel strand in the steel sleeve column is locked by the anchor removal auxiliary fixing cylinder in the process of the six tightening rings jointly applying pressure to the prestressed steel strand in the steel sleeve column, and at the same time, combined with the extrusion and limiting cooperation of the three groups of main base half-cylinders and the main base cover tubes as well as the auxiliary half-cylinder seats and the auxiliary half-cover tubes on the outer surface of the steel sleeve column, the anchor removal auxiliary frame can realize the positioning braking of the prestressed steel strand under the cooperation of the anchor removal auxiliary fixing cylinder to prevent the prestressed steel strand from being partially retracted after the first tensioning.

[0021] 4. The through-type jack anchor removal equipment can directly remove the anchor while using the anchor removal auxiliary frame to position and brake the prestressed steel strand, and can also perform secondary tensioning on the prestressed steel strand with the help of a telescopic oil cylinder; and can also change the angle between the telescopic rod and the pressure rod, the angle between the pressure rod and the main base cover tube, and the angle between the pressure plate and the front steel plate through the insertion and positioning of the hexagonal rod at the above three hinged parts, thereby correspondingly changing the positioning and braking strength of the anchor removal auxiliary frame on the prestressed steel strand, and can adapt to positioning and clamping according to the different materials, different contact surfaces and different friction coefficients of the prestressed steel strand, prevent relative sliding between the prestressed steel strand and the anchor removal auxiliary frame, and ensure safe anchor removal.

[0022] 5. The through-type jack anchor removal equipment, by using the main base half-cylinder and the main base cover cylinder as well as the auxiliary half-cylinder seat and the auxiliary half-cover cylinder to wrap the outer surface of the prestressed steel strand, acts as the first layer of blocking protection, the telescopic rod and the pressure rod and the connecting hinge rod block the outside of the prestressed steel strand, acts as the second layer of blocking protection, and the pressure plate blocks the outside of the telescopic rod, acts as the third layer of blocking protection. Through the mutual cooperation between the above-mentioned anchor removal auxiliary frame, anchor removal auxiliary support legs, anchor removal auxiliary tightening parts and anchor removal auxiliary fixing cylinder, three layers of blocking protection are provided for the prestressed steel strand, which can avoid the risk of local wire breakage or slippage of the prestressed steel strand.

[0023] 6. During anchor withdrawal, the through-type jack anchor withdrawal equipment can take out the clip installed inside the working anchor plate from the empty space of the anchor withdrawal auxiliary frame. At the same time, the anchor withdrawal auxiliary frame, in conjunction with the anchor withdrawal auxiliary support legs, anchor withdrawal auxiliary tightening parts and anchor withdrawal auxiliary fixing cylinder, can prevent the clip from shrinking along with the prestressed steel strand when the jack returns oil. After all the clips are taken out and the jacks at both ends return oil, the secondary tensioning can be carried out without unplugging the anchor withdrawal auxiliary frame, which simplifies the operation process, reduces the time for re-tensioning, and can directly withdraw the anchor on site and operate continuously.

[0024] 7. The through-type jack anchor removal device slides on the telescopic rod along the guide rod cavity through the guide rod, and then the guide plate is clamped between the pressure plate and the vertical plate to provide support for the side of the pressure plate facing away from the telescopic rod. At the same time, the angle between the pressure plate and the front steel plate is locked by means of the hexagonal rod positioned and inserted between the pressure plate and the front hinge head. The pressure plate is pressed onto the telescopic rod with the help of the guide rod. On the one hand, it can limit the front end of the telescopic rod and on the other hand, it can assist in fixing the extended length of the telescopic rod and the angle between the telescopic rod and the pressure rod.

[0025] 8. The through-type jack anchor removal equipment can also combine with the telescopic rod and the pressure rod to prevent the corresponding prestressed steel strand from warping, avoiding the sudden breakage or slippage of the corresponding prestressed steel strand within the range covered by the anchor removal auxiliary frame, eliminating the injury to construction workers caused by the prestressed steel strand being thrown out when the prestressed steel strand is broken, and also providing a third layer of blocking protection for the safe transmission of the prestressed steel strand in the anchor removal auxiliary frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the external structure of a through-type jack anchor removal device of the present invention;

[0027] Figure 2 This is a schematic diagram of the overall structure of the anchor withdrawal auxiliary frame of the present invention;

[0028] Figure 3 This is a schematic diagram of the assembly structure of the anchor-removal auxiliary support legs and the anchor-removal auxiliary frame of the present invention;

[0029] Figure 4 This is a schematic diagram of the assembly structure of the anchor withdrawal auxiliary tightening member and the anchor withdrawal auxiliary frame of the present invention;

[0030] Figure 5 It is a partial cross-sectional view of the anchor withdrawal auxiliary cylinder and the anchor withdrawal auxiliary frame of the present invention;

[0031] Figure 6 This is a schematic diagram of the overall structure of the anchor withdrawal auxiliary cylinder of the present invention;

[0032] Figure 7 This is a partial disassembly diagram of the auxiliary half-cover cylinder and the anchor withdrawal auxiliary fixing cylinder of the present invention;

[0033] Figure 8 This is a partial disassembly diagram of the main base half cylinder and the anchor withdrawal auxiliary cylinder of the present invention;

[0034] Figure 9 This is a schematic structural diagram of the clamping ring and the semi-steel contact ring of the present invention;

[0035] Figure 10 This is a schematic diagram of the assembly structure of the clip and the working anchor plate of the present invention;

[0036] Figure 11 This is a schematic diagram of the assembly structure of the double-ended jacket and the second working anchor plate of the present invention.

[0037] Figure: 1. Jack; 2. Working anchor plate 1; 3. Anchor withdrawal auxiliary frame; 31. Rear steel plate; 32. Front steel plate; 33. Thick-walled steel pipe; 34. Rear hinge; 35. Front hinge; 36. Vertical plate; 4. Anchor withdrawal auxiliary support leg; 41. Telescopic rod; 42. Pressure rod; 43. Connecting hinge rod; 44. Anchor plate installation; 5. Anchor withdrawal auxiliary tightening member; 51. Pressure plate; 52. Guide rod; 53. Slot 54. Guide plate; 6. Anchor withdrawal auxiliary cylinder; 61. Steel sleeve; 62. Main base half cylinder; 63. Auxiliary half cylinder seat; 64. Main base cover cylinder; 65. Auxiliary half cover cylinder; 66. Inner convex strip; 67. Steel tie belt; 68. Locking plate; 69. Pressing ring; 610. Straightening rod; 611. Semi-steel contact ring; 7. Telescopic cylinder; 8. Second working anchor plate; 9. Prestressed steel strand; 10. Clip; 11. Double-headed jacket. DETAILED DESCRIPTION

[0038] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described to better illustrate the principles of the invention and its practical application, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for specific applications.

[0039] The first embodiment, as Figures 1 to 11 As shown, the present invention provides a technical solution: a through-type jack anchor removal device, comprising a jack 1, a working anchor plate 2 is installed at the rear end of the jack 1, and is arranged on the side facing the concrete surface, a telescopic oil cylinder 7 is installed at the end of the jack 1 away from the working anchor plate 2, and is telescopically installed with the jack 1, a working anchor plate 2 8 is installed at the end of the telescopic oil cylinder 7 away from the jack 1, and seven prestressed steel strands 9 are installed inside the working anchor plate 2 8, and are sequentially passed through the working anchor plate 2 8 and the working anchor plate 2 and inserted into the concrete surface; the interior of the working anchor plate 2 and is prestressed The part through which the stress steel strand 9 passes is fitted with a clip 10, and the contracted end is inserted into the working anchor plate 1 2, and the flared end is installed at the end away from the jack 1. The part of the working anchor plate 2 8 through which the prestressed steel strand 9 passes is installed with a double-headed jacket 11, and the double-headed jacket 11 is composed of two symmetrically connected vertebral jackets, with the middle part contracted and the two ends flared. Among them, the middle part of the jack 1 and the telescopic cylinder 7 are both penetrated with a central opening to ensure that the seven prestressed steel strands 9 passing through the working anchor plate 1 2 can smoothly pass through the middle part of the jack 1 and the telescopic cylinder 7;

[0040] Anchor withdrawal auxiliary frame 3, which is assembled between jack 1 and working anchor plate 2, and is used to guide prestressed steel strand 9. Anchor withdrawal auxiliary frame 3 includes a rear steel plate 31, and a front steel plate 32 is installed in parallel at one end of the rear steel plate 31 close to the jack 1. A thick-walled steel pipe 33 is fixedly connected between the rear steel plate 31 and the front steel plate 32, and is arranged in a circular array. The surfaces of the rear steel plate 31 and the front steel plate 32 are both perforated corresponding to the prestressed steel strand 9.

[0041] Anchor-removal auxiliary support legs 4, which are assembled on the rear steel plate 31 and are used to fix the rear steel plate 31 on the concrete surface;

[0042] Anchor withdrawal auxiliary tightening member 5, which is assembled on the front steel plate 32 and is used to limit the telescopic rod 41;

[0043] The anchor withdrawal auxiliary fixing cylinder 6 is assembled between the rear steel plate 31 and the front steel plate 32 and is used to squeeze and limit the prestressed steel strand 9.

[0044] The outer surface side of the rear steel plate 31 is fixedly connected to the rear hinge head 34 in a circular array, the side of the front steel plate 32 facing the rear steel plate 31 is fixedly connected to the front hinge head 35 in a circular array, and the outer surface side of the front steel plate 32 is fixedly connected to the vertical plate 36 in a circular array, and the front hinge head 35 and the vertical plate 36 are correspondingly arranged on the front steel plate 32.

[0045] The anchor withdrawal auxiliary support leg 4 includes a telescopic rod 41, the end of the telescopic rod 41 close to the front steel plate 32 is hinged with a pressure rod 42, the middle part of the telescopic rod 41 is hinged with a connecting hinge rod 43, the end of the telescopic rod 41 away from the pressure rod 42 is hinged with an installation anchor plate 44, the connecting hinge rod 43 is hinged to the rear steel plate 31 through the rear hinge head 34, and the installation anchor plate 44 is fixed on the concrete surface by bolts.

[0046] When in use, with the help of six bolts and nuts, the six mounting anchor plates 44 are fixed in a circular array on the concrete surface in advance, and then the prestressed steel strands 9 protruding from the concrete surface are sequentially passed through the working anchor plate 1 2, the anchor withdrawal auxiliary frame 3, the jack 1, the telescopic cylinder 7 and the working anchor plate 2 8, and exposed from the front end of the working anchor plate 2 8. During the process of passing the prestressed steel strands 9, the clip 10 is inserted into the working anchor plate 1 2 in advance, so that the flared end of the clip 10 faces the working anchor plate 2. Anchor plate 1 2, the double-headed jacket 11 is inserted into the working anchor plate 2 8 in advance. During the period when the prestressed steel strand 9 passes through the inner side of the anchor withdrawal auxiliary frame 3, ensure that each prestressed steel strand 9 passes between the corresponding main base half-cylinder 62 and the main base cover cylinder 64, through between the auxiliary half-cylinder seat 63 and the auxiliary half-cover cylinder 65, and through the inner middle part of the steel sleeve column 61, start the jack 1 to drive the telescopic cylinder 7 to push the working anchor plate 2 8 forward, and tension the prestressed steel strand 9.

[0047] During the tensioning of the prestressed steel strand 9, the steel strap 67 can be tightened, the locking plate 68 can be locked, and then the telescopic rod 41 can be extended. Under the guidance of the guide rod 52 and the downward pressure of the compression plate 51 whose angle is locked, the main base cover tube 64 and the auxiliary half cover tube 65 can be driven to squeeze the corresponding prestressed steel strand 9 respectively. Not only can the inner convex strip 66 be used to increase the pressure area of the contact between the unanchor auxiliary cylinder 6 and the prestressed steel strand 9 surface, but also the prestressed steel strand 9 can be effectively prevented from being stuck on the main base. The seat half-cylinder 62 and the main base cover cylinder 64 slip off, preventing the prestressed steel strand 9 from slipping off between the auxiliary half-cylinder seat 63 and the auxiliary half-cover cylinder 65, improving the gripping strength of the anchor withdrawal auxiliary fixing cylinder 6 on the prestressed steel strand 9, and effectively preventing the prestressed steel strand 9 from becoming thread-debonded or slipping off. At the same time, the prestressed steel strand 9 can be temporarily braked in the anchor withdrawal auxiliary fixing cylinder 6, so that the telescopic cylinder 7 can be extended again after returning, and the prestressed steel strand 9 can be tensioned for the second time, thereby improving the limit range of single tensioning of the telescopic cylinder 7.

[0048] The second embodiment, based on the first embodiment, see Figures 2 to 8As shown, the anchor withdrawal auxiliary cylinder 6 includes a steel sleeve column 61, which is wrapped around the prestressed steel strand 9 located in the middle of the rear steel plate 31. The outer surface of the steel sleeve column 61 is a circular array with three main base half cylinders 62 fixedly connected, and the outer surface of the steel sleeve column 61 is a circular array with three auxiliary half cylinder seats 63 fixedly connected. The main base half cylinder 62 and the auxiliary half cylinder seats 63 are alternately installed on the steel sleeve column 61, wherein the main base half cylinder 62 is assembled with a main base cover cylinder 64 on the side away from the steel sleeve column 61; the auxiliary half cylinder seat 63 is assembled with a main base cover cylinder 64 on the side away from the steel sleeve column 61; An auxiliary half-cover cylinder 65 is assembled on one side of the sleeve column 61, and has the same structure as the main base cover cylinder 64. The inner wall surfaces of the main base half cylinder 62, the auxiliary half-cylinder seat 63, the main base cover cylinder 64 and the auxiliary half-cover cylinder 65 are all fixedly connected with an inner convex strip 66, and are all arranged close to one end of the rear steel plate 31. A steel binding belt 67 is installed through the interior of the main base half cylinder 62 and is arranged away from one end of the rear steel plate 31, and a locking plate 68 is installed in the middle of the steel binding belt 67 for limiting the telescopic length of the steel binding belt 67.

[0049] The inner side of the steel sleeve column 61 is installed with a tightening ring 69 in a circular array, and the diagonally opposite sides of the edges at both ends are chamfered. There are six of them, evenly distributed on the inner side of the steel sleeve column 61, and close to one end of the rear steel plate 31. The tightening ring 69 is fixedly connected to the middle of one side of the inner wall of the steel sleeve column 61; the straightening rod 610 is fixedly connected to a semi-steel contact ring 611 at one end away from the tightening ring 69, and is installed as a whole inside the main base semi-cylinder 62, with its top exposed to the upper part of the outer wall of the main base semi-cylinder 62, and inserted into the bottom of the main base cover cylinder 64, and the main base cover cylinder 64 is installed in combination with the main base semi-cylinder 62 through a steel strap 67 and a locking plate 68. The straightening rod 610 passes through the main base semi-cylinder 62 and the steel sleeve column 61 and is inserted into the inner side of the steel sleeve column 61.

[0050] The clamping ring 69, the straightening rod 610 and the semi-steel contact ring 611 together constitute a clamping part, and a clamping part is also installed inside the auxiliary semi-cylinder seat 63, which are used together to squeeze and limit the prestressed steel strand 9 inside the steel sleeve column 61 to prevent the prestressed steel strand 9 inside the steel sleeve column 61 from slipping. The end of the pressure rod 42 away from the telescopic rod 41 is hinged to the main base cover tube 64. Similarly, the auxiliary semi-cylinder seat 63 is hinged to its corresponding pressure rod 42, and the clamping plate 51 is slidably installed with the telescopic rod 41 through the guide rod 52, and a guide rod cavity is provided on the contact surface of the telescopic rod 41 and the guide rod 52, wherein the hinged part of the telescopic rod 41 and the pressure rod 42, the hinged part of the pressure rod 42 and the main base cover tube 64, and the hinged part of the clamping plate 51 and the front hinge head 35 are all plugged with hexagonal rods for inserting and positioning the above three hinged parts.

[0051] During use, during the extension of the telescopic rod 41, the pressure rod 42 applies pressure to the top of the main base cover tube 64 and the auxiliary half cover tube 65, so that the semi-steel contact ring 611 inserted in the main base cover tube 64 and the auxiliary half cover tube 65 is pressed into the steel sleeve column 61, and the pressing straight rod 610 is used to further squeeze the tightening ring 69 into the steel sleeve column 61, and the bevel edges between each two adjacent tightening rings 69 are chamfered, so that the corners of the two adjacent tightening rings 69 can be further superimposed and overlapped, thereby being able to tighten six In the process of the pressure ring 69 jointly applying pressure to the prestressed steel strand 9 in the steel sleeve 61, it is ensured that the position of the prestressed steel strand 9 in the steel sleeve 61 is locked by the anchor removal auxiliary fixing cylinder 6. At the same time, the three groups of main base half-cylinders 62 and main base cover cylinders 64 and the auxiliary half-cylinder seats 63 and auxiliary half-cover cylinders 65 are combined to squeeze and limit the prestressed steel strand 9 on the outer surface of the steel sleeve 61, so as to realize the positioning and braking of the prestressed steel strand 9 by the anchor removal auxiliary frame 3 in cooperation with the anchor removal auxiliary fixing cylinder 6, so as to prevent the prestressed steel strand 9 from being partially retracted after the first tensioning.

[0052] During the positioning and braking of the prestressed steel strand 9 using the anchor removal auxiliary frame 3, the anchor can be directly removed, and the prestressed steel strand 9 can also be tensioned for the second time with the help of the telescopic oil cylinder 7; and the hexagonal rod can also be inserted and positioned at the above three hinged parts to change the angle between the telescopic rod 41 and the pressure rod 42, the angle between the pressure rod 42 and the main base cover tube 64, and the angle between the clamping plate 51 and the front steel plate 32, thereby correspondingly changing the positioning and braking strength of the prestressed steel strand 9 by the anchor removal auxiliary frame 3, and can adapt to positioning and clamping according to the different materials, different contact surfaces and different friction coefficients of the prestressed steel strand 9, prevent relative sliding between the prestressed steel strand 9 and the anchor removal auxiliary frame 3, and ensure safe anchor removal.

[0053] With the help of the main base half-cylinder 62, the main base cover cylinder 64, the auxiliary half-cylinder seat 63 and the auxiliary half-cover cylinder 65, the outer surface of the prestressed steel strand 9 is wrapped to act as the first layer of blocking protection. The telescopic rod 41, the pressure rod 42 and the connecting hinge rod 43 block the outside of the prestressed steel strand 9 to act as the second layer of blocking protection, and the clamping plate 51 blocks the outside of the telescopic rod 41 to act as the third layer of blocking protection. Through the mutual cooperation between the above-mentioned anchor removal auxiliary frame 3, anchor removal auxiliary support leg 4, anchor removal auxiliary tightening member 5 and anchor removal auxiliary fixing cylinder 6, three layers of blocking protection are provided for the prestressed steel strand 9, which can avoid the risk of local wire breakage or slippage of the prestressed steel strand 9.

[0054] During anchor withdrawal, the clip 10 installed inside the working anchor plate 2 can be taken out from the empty space of the anchor withdrawal auxiliary frame 3. At the same time, the anchor withdrawal auxiliary frame 3, in conjunction with the anchor withdrawal auxiliary support legs 4, the anchor withdrawal auxiliary tightening member 5 and the anchor withdrawal auxiliary fixing tube 6, can prevent the clip 10 from shrinking along with the prestressed steel strand 9 when the oil of the jack 1 is returned. After all the clips 10 are taken out and the oil of the jacks 1 at both ends is returned, the secondary tensioning can be carried out without unplugging the anchor withdrawal auxiliary frame 3, which simplifies the operation process, reduces the time for re-tensioning, and can directly withdraw the anchor on site and operate continuously.

[0055] The third embodiment, based on the first and second embodiments, see Figures 2 to 4 As shown, the anchor withdrawal auxiliary tightening member 5 includes a clamping plate 51, and the end of the clamping plate 51 away from the telescopic rod 41 is hinged to the front steel plate 32 through the front hinge 35, and a guide rod 52 is fixedly installed in the middle of the side of the clamping plate 51 facing the telescopic rod 41, and the free end is exposed on the outside of the free end of the clamping plate 51, and the free end side of the guide rod 52 is chamfered. The side of the clamping plate 51 away from the telescopic rod 41 is provided with card slots 53 at equal intervals, and a guide plate 54 is installed between the clamping plate 51 and the vertical plate 36, and one end is inserted in the middle of the vertical plate 36, and the other end is clamped to the clamping plate 51 through the card slot 53.

[0056] When in use, the guide rod 52 slides along the guide rod cavity on the telescopic rod 41, and then the guide plate 54 is clamped between the clamping plate 51 and the vertical plate 36, providing support for the side of the clamping plate 51 facing away from the telescopic rod 41. At the same time, the hexagonal rod inserted between the clamping plate 51 and the front hinge head 35 is used to lock the angle between the clamping plate 51 and the front steel plate 32. The clamping plate 51 is pressed onto the telescopic rod 41 with the help of the guide rod 52, which can, on the one hand, limit the front end of the telescopic rod 41 and, on the other hand, On the one hand, it can assist in fixing the extended length of the telescopic rod 41 and the angle between the telescopic rod 41 and the pressure rod 42, and can also combine the telescopic rod 41 and the pressure rod 42 to jointly prevent the corresponding prestressed steel strand 9 from warping, thereby avoiding the corresponding prestressed steel strand 9 from sudden wire breakage or slipping within the range covered by the anchor withdrawal auxiliary frame 3, eliminating the prestressed steel strand 9 from being thrown out when broken and causing injuries to construction workers, and also providing a third layer of blocking protection for the safe transmission of the prestressed steel strand 9 in the anchor withdrawal auxiliary frame 3.

[0057] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A through-type jack anchor removal device, comprising a jack (1), characterized in that: The rear end of the jack (1) is installed with a working anchor plate 1 (2), and is arranged facing the side of the concrete surface. The end of the jack (1) away from the working anchor plate 1 (2) is installed with a telescopic oil cylinder (7), and is telescopically installed with the jack (1). The end of the telescopic oil cylinder (7) away from the jack (1) is installed with a working anchor plate 2 (8). The interior of the working anchor plate 2 (8) is penetrated by seven prestressed steel strands (9), which penetrate the working anchor plate 2 (8) and the working anchor plate 1 (2) in sequence and are inserted into the concrete surface. An anchor removal auxiliary frame (3), the anchor removal auxiliary frame (3) is assembled between the jack (1) and the working anchor plate (2), and is used to guide the prestressed steel strand (9), the anchor removal auxiliary frame (3) includes a rear steel plate (31), a front steel plate (32) is installed in parallel at one end of the rear steel plate (31) close to the jack (1), and a thick-walled steel pipe (33) is fixedly connected between the rear steel plate (31) and the front steel plate (32), and the surfaces of the rear steel plate (31) and the front steel plate (32) are both provided with perforations corresponding to the prestressed steel strand (9); An anchor-removing auxiliary support leg (4), the anchor-removing auxiliary support leg (4) is assembled on the rear steel plate (31) and is used to fix the rear steel plate (31) on the concrete surface; the anchor-removing auxiliary support leg (4) includes a telescopic rod (41), the end of the telescopic rod (41) close to the front steel plate (32) is hinged to a pressure rod (42), the middle part of the telescopic rod (41) is hinged to a connecting hinge rod (43), the end of the telescopic rod (41) away from the pressure rod (42) is hinged to a mounting anchor plate (44), the connecting hinge rod (43) is hinged to the rear steel plate (31) through a rear hinge head (34), and the mounting anchor plate (44) is fixed to the concrete surface by bolts; An anchor release auxiliary tightening member (5) is assembled on the front steel plate (32) and is used to limit the telescopic rod (41); the anchor release auxiliary tightening member (5) includes a pressing plate (51), and the end of the pressing plate (51) away from the telescopic rod (41) is hinged to the front steel plate (32) through a front hinge head (35), and a guide rod (52) is fixedly installed in the middle of a side of the pressing plate (51) facing the telescopic rod (41). , and the free end is exposed outside the free end of the pressing plate (51), and the free end side of the guide rod (52) is chamfered, and the pressing plate (51) is provided with slots (53) at equal intervals on a side away from the telescopic rod (41), and a guide plate (54) is installed between the pressing plate (51) and the vertical plate (36), and one end is inserted into the middle of the vertical plate (36), and the other end is clamped with the pressing plate (51) through the slot (53); An anchor withdrawal auxiliary fixing cylinder (6) is assembled between the rear steel plate (31) and the front steel plate (32) and is used to squeeze and limit the prestressed steel strand (9). The anchor withdrawal auxiliary fixing cylinder (6) includes a steel sleeve (61) and is wrapped around the prestressed steel strand (9) located in the middle of the rear steel plate (31). The outer surface of the steel sleeve (61) is fixedly connected to three main base half-cylinders (62) in a circular array, and the outer surface of the steel sleeve (61) is fixedly connected to three auxiliary half-cylinder seats (63) in a circular array. The main base half-cylinders (62) and the auxiliary half-cylinder seats (63) are alternately installed on the steel sleeve (61), wherein the main base half-cylinder (62) is assembled with a main base cover cylinder (64) on the side facing away from the steel sleeve (61).

2. The through-type jack anchor removal device according to claim 1, characterized in that: A clip (10) is embedded and installed in the portion of the working anchor plate (2) where the prestressed steel strand (9) passes through, and the contracted end is inserted into the working anchor plate (2), and the flared end is installed at the end away from the jack (1). A double-headed jacket (11) is installed in the portion of the working anchor plate (8) where the prestressed steel strand (9) passes through, and the double-headed jacket (11) is composed of two symmetrically connected vertebral jackets, with the middle portion contracted and the two ends flared.

3. The through-type jack anchor removal device according to claim 1, characterized in that: The outer surface side of the rear steel plate (31) is fixedly connected to a rear hinge head (34) in a circular array, the side of the front steel plate (32) facing the rear steel plate (31) is fixedly connected to a front hinge head (35) in a circular array, and the outer surface side of the front steel plate (32) is fixedly connected to a vertical plate (36) in a circular array, and the front hinge head (35) and the vertical plate (36) are correspondingly arranged on the front steel plate (32).

4. The through-type jack anchor removal device according to claim 1, characterized in that: The auxiliary half-cylinder seat (63) is assembled with an auxiliary half-cover cylinder (65) on the side facing away from the steel sleeve column (61), and has the same structure as the main base cover cylinder (64). The inner wall surfaces of the main base half-cylinder (62), the auxiliary half-cylinder seat (63), the main base cover cylinder (64) and the auxiliary half-cover cylinder (65) are all fixedly connected with inner convex strips (66), and are all arranged close to one end of the rear steel plate (31). A steel binding belt (67) is installed through the interior of the main base half-cylinder (62) and is arranged away from one end of the rear steel plate (31), and a locking plate (68) is installed in the middle of the steel binding belt (67).

5. The through-type jack anchor removal device according to claim 4, characterized in that: The inner side of the steel sleeve column (61) is provided with a circular array of tightening rings (69), and the oblique opposite sides of the edges at both ends are chamfered. There are six of them, which are evenly distributed on the inner side of the steel sleeve column (61) and close to one end of the rear steel plate (31). The tightening ring (69) is fixedly connected to a straightening rod (610) in the middle of one side of the inner wall of the steel sleeve column (61) in close contact with the inner wall of the steel sleeve column (61).

6. The through-type jack anchor removal device according to claim 5, characterized in that: The straightening rod (610) is fixedly connected to a semi-steel contact ring (611) at one end away from the pressing ring (69), and is installed as a whole inside the main base semi-cylinder (62), with its top exposed at the upper part of the outer wall of the main base semi-cylinder (62) and inserted into the bottom of the main base cover cylinder (64), and the main base cover cylinder (64) is assembled and installed with the main base semi-cylinder (62) through a steel strap (67) and a locking plate (68). The straightening rod (610) passes through the main base semi-cylinder (62) and the steel sleeve column (61) and is inserted into the inner side of the steel sleeve column (61).

7. The through-type jack anchor removal device according to claim 6, characterized in that: The clamping ring (69), the straightening rod (610) and the semi-steel contact ring (611) together constitute a clamping member, and a clamping member is also installed inside the auxiliary semi-cylinder seat (63). The end of the pressure rod (42) away from the telescopic rod (41) is hinged to the main base cover tube (64), and the clamping plate (51) is slidably installed with the telescopic rod (41) through the guide rod (52), and a guide rod cavity is opened on the surface where the telescopic rod (41) and the guide rod (52) contact each other, wherein the hinged portion of the telescopic rod (41) and the pressure rod (42), the hinged portion of the pressure rod (42) and the main base cover tube (64), and the hinged portion of the pressure plate (51) and the front hinge head (35) are all plugged with hexagonal rods.

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