Prestressed member tensioning equipment for construction engineering

Abstract

The present application relates to the technical field of construction engineering, and discloses a prestressed member tensioning device for construction engineering, comprising an anchoring plate, wherein the anchoring plate is threadedly sleeved with the threaded plate through a threaded hole, the anchoring plate is movably sleeved with a smooth plate through a threaded hole, the front end of the clip is movably sleeved with the threaded plate, and the rear end of the clip is fixedly sleeved with the smooth plate, and the limiter is movably arranged between the threaded plate and the smooth plate. During tensioning, the inner ring of the clip does not contact the outer wall of the steel strand, effectively preventing the clip and the steel strand from continuous friction and causing wear on both. After tensioning and before de-tensioning, the threaded plate and the smooth plate are fitted together by a limit rod and a limit block, so that the clip is pushed and completely sleeved in the main through hole, thereby achieving clamping and fixing of the clip and the steel strand. During de-tensioning, the stable engagement effect between the clip and the steel strand effectively solves the problem that the steel strand retracts due to the inability to be clamped and fixed, resulting in loss of prestress and difficulty in meeting design requirements.

Description

Technical Field

[0001] The present application relates to the technical field of construction engineering, and in particular to a prestressed member tensioning device for construction engineering. Background Art

[0002] In construction projects, to prevent premature cracking in reinforced concrete structures and to fully utilize high-strength steel and high-strength concrete, prestressed concrete components have been developed through long-term production practices. Prestressed concrete components are structures in which prestressed tendons (steel strands / bundles) are incorporated into the concrete. Prestressing is achieved through tensioning equipment to reduce or offset tensile stresses caused by external loads. In other words, prestressed concrete utilizes its higher compressive strength to compensate for its lack of tensile strength, delaying cracking in the tensile zone.

[0003] The construction process of prestressed concrete includes pre-tensioning and post-tensioning. Post-tensioned prestressed concrete components refer to prestressed concrete components that are established by tensioning prestressed tendons and anchoring them with anchors after the strength of the poured concrete reaches the design value. The tensioning equipment mainly consists of jacks, electric oil pumps, bellows, anchors, etc. Jacks are used to tension the prestressed tendons, and anchors are used to fix the tensioned prestressed tendons, so that the required prestress can be obtained.

[0004] However, the existing tensioning equipment still has some defects during use: the anchor is pushed into the pipe mouth where the prestressed tendons are sleeved to clamp the prestressed tendons, thereby achieving the purpose of fixing the prestressed tendons. However, during the tensioning process, the prestressed tendons will continue to rub against the clips in the anchor, which can easily cause wear of the clips engaged with the prestressed tendons. As a result, during the de-tensioning process, the clips cannot fix and clamp the prestressed tendons, causing the prestressed tendons to shrink, and the prestress will be lost due to the shrinkage of the prestressed tendons. In particular, when the length of the prestressed tendons is small, the shrinkage is particularly obvious, which ultimately makes it difficult for the applied prestress to meet the design requirements. Summary of the Invention

[0005] The present application proposes a tensioning device for prestressed parts in construction projects, which has the advantages of effectively preventing the steel strands from rubbing against the clips during tensioning, reducing the surface wear of the two, thereby improving the clamping and fixing effect of the two during de-tensioning, reducing the retraction of the steel strands, and preventing prestress loss. It is used to solve the problem that the clips cannot fix and clamp the steel strands, causing the clips to retract, and then the prestress is lost, making it difficult to meet the design requirements.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a prestressed member tensioning device for construction engineering, comprising:

[0007] An anchoring plate, the anchoring plate is composed of a square plate and a circular plate, and the circular plate is fixedly sleeved on the middle part of the square plate, and a threaded hole is opened in the middle part of the circular plate;

[0008] A threaded plate, wherein the anchoring plate is threadedly sleeved with the threaded plate through threaded holes;

[0009] A smooth plate, wherein the anchor plate is movably connected to the smooth plate through a threaded hole, and the smooth plate is located behind the threaded plate;

[0010] Steel strand, the threaded plate is provided with a main through hole, and the smooth plate is provided with an auxiliary through hole, and the steel strand passes through the main through hole and the auxiliary through hole;

[0011] A clip, the clip comprising a fixed block and a fixed membrane, a fixed membrane fixedly connected between two adjacent fixed blocks, the front ends of the fixed block and the fixed membrane movably sleeved with the main through-hole of the threaded plate, the rear end of the fixed block affixed to the side wall of the smooth plate, an auxiliary groove is provided on the smooth plate outside the auxiliary through-hole, and the rear end of the fixed membrane is fixedly sleeved with the auxiliary groove of the smooth plate;

[0012] A limit piece, wherein the limit piece includes a limit rod and a limit block, the threaded plate and the smooth plate are both provided with connection holes, and the two ends of the limit rod are respectively movably engaged with the two symmetrically arranged connection holes, an upper limit rod and a lower limit rod are provided in one of the limit pieces, and the limit block is movably engaged between the upper and lower limit rods, and the limit block is located between the threaded plate and the smooth plate when tensioning, and is located behind the smooth plate when de-tensioning;

[0013] The limiter is used to control the distance between the threaded plate and the smooth plate at each time period, so that the clamping piece does not contact the steel strand during tensioning, and the clamping piece is engaged with the steel strand during de-tensioning.

[0014] Furthermore, the main through hole is in the shape of a truncated cone that is narrow in the front and wide in the back, and the auxiliary through hole is in the shape of a cylinder. The minimum apertures of the main through hole and the auxiliary through hole are both larger than the diameter of the steel strand.

[0015] Furthermore, the number of the clips is several, and the clips are evenly arranged around the center of the threaded plate or the smooth plate, and the clips are movably sleeved on the outside of the steel strand, and the clips further include:

[0016] The outer wall of the fixing block is fitted with the inner wall of the main through hole. There are four fixing blocks, and the four fixing blocks are evenly arranged around the center of the main through hole or the auxiliary through hole.

[0017] Furthermore, the number of the limiting members is two, and the two limiting members are located on the left and right sides of the threaded plate or the smooth plate.

[0018] Furthermore, the facing surfaces of the threaded plate and the smooth plate have opposite magnetic properties.

[0019] Furthermore, the threaded plate, smooth plate, clip and limit piece constitute a clamping assembly, two clamping assemblies are linearly arranged in the anchoring plate, and the two clamping assemblies constitute a group of clamping assemblies, the anchoring plate and a group of clamping assemblies constitute an anchor mechanism, and there is an anchor mechanism at each end of the steel strand, which is located on the clamping assembly at the rear end of the anchoring plate, and a threaded ring is fixedly connected to the middle of the smooth sliding plate side away from the threaded plate.

[0020] By arranging a group of clamping components in the anchoring plate, and a group of clamping components consists of two clamping components arranged linearly, one end of the steel strand can be anchored twice at the same time, effectively enhancing the stable clamping effect of the steel strand and the clip. After cutting off the excess steel strand and before sealing the end, the clamping component located at the rear end of the anchoring plate is controlled to move spirally toward the front end of the anchoring plate, thereby effectively performing a rotational winding operation on multiple steel strands, and changing the multiple steel strands located between the two clamping components from a parallel state to a winding state, thereby further enhancing the stable clamping effect of the steel strand and the clip, and further solving the problem that the steel strand shrinks due to the inability to clamp and fix, resulting in prestress loss and difficulty in meeting design requirements.

[0021] Furthermore, the clamping assembly further includes:

[0022] The air guide is located on the left and right sides of the circular plate outside the square plate of the anchoring plate and has side holes, and the air guide is fixedly embedded in the interior of the smooth plate.

[0023] Furthermore, the air guide comprises:

[0024] An air guide ring is provided behind each of the clips, and the air guide ring is circular;

[0025] An air guide tube, wherein two adjacent air guide rings are fixedly connected to each other through the air guide tube;

[0026] An air intake pipe, wherein the number of the air intake pipes is two, and one end of the air intake pipe is fixedly connected to one of the air guide rings;

[0027] An air outlet pipe is fixedly connected to one side of the air guide ring, and the air outlet pipe is connected to the fixed membrane. The inner wall of the fixed membrane is provided with a plurality of small air holes.

[0028] By arranging a clamping assembly inside the anchoring plate, the clamping assembly also includes an air guide member embedded in the smooth plate, and the air guide member is composed of an air guide ring, an air guide pipe, an air inlet pipe and an air outlet pipe. During assembly, since the air outlet pipe is arranged on the smooth plate located in the auxiliary groove, the fixed membrane is connected to the air outlet pipe. Therefore, during tensioning, the electric air pump delivers gas to the air guide member to exert an expansion force on the fixed membrane to achieve full expansion of the fixed membrane, thereby pushing the fixed block to fit the inner wall of the main through hole, further achieving that the inner ring of the clip does not contact the outer wall of the steel strand, further preventing the clip and the steel strand from continuous friction and causing wear of both. In addition, since the inner ring of the fixed membrane is provided with small air holes, the excess gas in the fixed membrane is effectively discharged, thereby accurately performing air blowing and cooling operations on the clip and steel strand, effectively preventing heat accumulation in the steel strand during tensioning, which causes quality reduction or even damage to the steel strand and the clip.

[0029] Furthermore, it also includes:

[0030] A concrete member, wherein end grooves are formed at both ends of the concrete member, and the end grooves of the concrete member are movably connected to the anchor mechanism through bolts;

[0031] A connecting mechanism is provided inside the concrete component.

[0032] Furthermore, the connecting mechanism includes:

[0033] A bellows, wherein the concrete component is movably sleeved with a bellows;

[0034] Guide tubes, where the two ends of the corrugated tube are respectively fixedly sleeved with guide tubes, and the guide tubes are in contact with the anchor plate, and the steel strands are movable through the corrugated tubes and the guide tubes;

[0035] Spiral ribs, the outer portion of the guide tube is fixedly sleeved with spiral ribs, and the spiral ribs are located on one side of the anchor plate;

[0036] a connecting pipe, wherein the top end of the corrugated pipe is fixedly connected to one end of the connecting pipe, and the other end of the connecting pipe passes through the interior of the concrete component;

[0037] The material conveying piece is fixedly connected to the top end of one of the guide tubes, and the material conveying piece passes through the anchoring plate.

[0038] The beneficial effects of the present invention are as follows:

[0039] The present application provides a construction engineering prestressed member tensioning device, which provides a clamping assembly inside the anchor plate, the clamping assembly includes a threaded plate, a smooth plate, a clip and a limit piece, and the clip is composed of a fixed block and a fixed membrane, and the limit piece is composed of a limit rod and a limit block. During assembly, the front ends of the fixed block and the fixed membrane are movably connected to the main through hole of the threaded plate, and the rear end of the fixed membrane is fixedly connected to the auxiliary groove of the smooth plate, and the threaded plate and the smooth plate are separated by the limit rod and the limit block, so that the clip is not completely connected to the main through hole, and the fixed block is elastically connected to the fixed membrane. Under the action of expansion, it fits with the inner wall of the main through hole, so that when tensioning, the inner circle of the clip does not contact the outer wall of the steel strand, effectively preventing the clip and the steel strand from continuous friction and causing wear on both. After tensioning and before de-tensioning, the threaded plate and the smooth plate are fit together by using the limit rod and the limit block, so that the clip is pushed and completely sleeved in the main through hole, realizing the clamping and fixation of the clip and the steel strand. When de-tensioning, the stable engagement effect between the clip and the steel strand effectively solves the problem that the steel strand shrinks due to the inability to clamp and fix, resulting in prestress loss and difficulty in meeting design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only embodiments of the present invention. Those skilled in the art can also derive other drawings based on the provided drawings without inventive work.

[0041] Figure 1 It is a three-dimensional structural diagram of the whole of the present invention;

[0042] Figure 2 It is an overall three-dimensional structural diagram of the cross section of the concrete component in the present invention;

[0043] Figure 3 It is a cross-sectional three-dimensional structural diagram of the entire present invention;

[0044] Figure 4 For the present invention Figure 3 A magnified structural diagram;

[0045] Figure 5 It is a three-dimensional structural diagram of the steel strand, connecting mechanism and anchor mechanism in the present invention;

[0046] Figure 6 It is a three-dimensional structural diagram of the steel strand and the connecting mechanism in the present invention;

[0047] Figure 7 It is a cross-sectional three-dimensional structural diagram of the steel strand and the connecting mechanism in the present invention;

[0048] Figure 8It is a three-dimensional structural diagram of the steel strand and anchor mechanism in the present invention;

[0049] Figure 9 It is a cross-sectional three-dimensional structural diagram of the steel strand and anchor mechanism in the present invention;

[0050] Figure 10 A three-dimensional structural diagram of a set of clamping components in the present invention;

[0051] Figure 11 This is a disassembled three-dimensional structural diagram of a clamping assembly without a threaded ring in the present invention;

[0052] Figure 12 A cross-sectional perspective structural diagram of a clamping assembly located at a fixed membrane without a threaded ring in the present invention;

[0053] Figure 13 It is a cross-sectional three-dimensional structural diagram of the smooth plate, threaded ring and air guide member in the present invention;

[0054] Figure 14 It is a cross-sectional three-dimensional structural diagram of the limiting member in the present invention;

[0055] Figure 15 This is a three-dimensional structural diagram of the clip in the present invention;

[0056] Figure 16 3D diagram of the air guide member of the present invention;

[0057] Figure 17 It is a three-dimensional structural diagram of the clip and the air guide in the present invention.

[0058] In the figure: 1. Concrete member; 2. Steel strand; 3. Connecting mechanism; 31. Bellows; 32. Guide tube; 33. Spiral rib; 34. Connecting pipe; 35. Feeding member; 4. Anchor mechanism; 41. Anchor plate; 42. Threaded plate; 43. Smooth plate; 44. Threaded ring; 5. Clip; 51. Fixed block; 52. Fixed membrane; 6. Air guide member; 61. Air guide ring; 62. Air guide pipe; 63. Air inlet pipe; 64. Air outlet pipe; 7. Limiting member; 71. Limiting rod; 72. Limiting block. DETAILED DESCRIPTION

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0060] Embodiment 1, a construction engineering prestressed member tensioning device, comprising a concrete member 1, such as Figure 1-Figure 3The concrete component 1 is composed of concrete and a steel frame. The forming process of the concrete component 1 is as follows: first, the steel frame is placed in a mold, and then concrete is poured in the mold. After the strength of the poured concrete reaches the design value, the mold is removed.

[0061] like Figure 2-Figure 3 Before pouring concrete, a connecting mechanism 3 is provided inside the concrete component 1, and the steel strand 2 passes through the connecting mechanism 3, which is used to help the steel strand 2 be arranged inside the concrete component 1. The connecting mechanism 3 includes a corrugated pipe 31, a guide pipe 32, a spiral rib 33, a connecting pipe 34 and a feeding piece 35. Figure 5-Figure 7 The interior of the concrete component 1 is movably sleeved with a bellows 31, and the two ends of the bellows 31 are fixedly sleeved with guide tubes 32, and the guide tubes 32 are fitted with the anchor plate 41. The steel strand 2 movably passes through the bellows 31 and the guide tube 32, that is, the bellows 31 and the guide tube 32 are pre-embedded in the concrete component 1 to form a channel for passing the steel strand 2. The outside of the guide tube 32 is fixedly sleeved with a spiral rib 33, and the spiral rib 33 is located on one side of the anchor plate 41, which is used to enhance the local bearing capacity of the concrete component 1, so as to In order to constrain concrete deformation, improve stress distribution, and enhance fatigue resistance, the top end of the bellows 31 is fixedly connected to one end of the connecting pipe 34, and the other end of the connecting pipe 34 passes through the interior of the concrete component 1. The top end of one of the guide tubes 32 is fixedly connected to a feeding piece 35, and the feeding piece 35 passes through the anchor plate 41. Before sealing the ends, the bellows 31 and the spiral reinforcement 33 are filled with concrete through the feeding piece 35, and the connecting pipe 34 is used to detect whether the bellows 31 and the spiral reinforcement 33 are completely filled.

[0062] like Figure 2-Figure 5 , end grooves are opened at both ends of the concrete component 1, and the end grooves of the concrete component 1 are movably connected to the anchor mechanism 4 by bolts, that is, the number of the anchor mechanism 4 is two, and the steel strand 2 passes through the anchor mechanism 4, which effectively provides assistance for anchoring the steel strand 2. An anchor mechanism 4 is composed of an anchor plate 41 and a group of clamping components. There are two clamping components linearly arranged in the anchor plate 41, and the two clamping components constitute a group of clamping components. After tensioning, the design of a group of clamping components can be used to anchor one end of the steel strand 2 twice at the same time. The threaded plate 42, the smooth plate 43, the clip 5 and the limiter 7 constitute a clamping component, which is specifically as follows. Figures 8-11The anchoring plate 41 is composed of a square plate and a circular plate, and the circular plate is fixedly sleeved in the middle of the square plate. A threaded hole is opened in the middle of the circular plate of the anchoring plate 41. The shape setting of the anchoring plate 41 effectively provides conditions for the stable installation of the clamping component. The anchoring plate 41 is threadedly sleeved with the threaded plate 42 through the threaded hole, so that the threaded plate 42 can be disassembled and installed on the anchoring plate 41 by rotation. The anchoring plate 41 is movably sleeved with the smooth plate 43 through the threaded hole, and the smooth plate 43 is located behind the threaded plate 42, so that the smooth plate 43 can be disassembled and installed on the anchoring plate 41 by horizontal movement. Figure 13 , a main through hole is provided on the threaded plate 42, and an auxiliary through hole is provided on the smooth plate 43. The steel strand 2 passes through the main through hole and the auxiliary through hole, effectively limiting the state of the steel strand 2 between the threaded plate 42 and the smooth plate 43, thereby helping to improve the stability of the steel strand 2 when it is subsequently set in the anchor mechanism 4. The main through hole is a truncated cone with a narrow front and a wide back, and the auxiliary through hole is a cylindrical shape. The minimum apertures of the main through hole and the auxiliary through hole are larger than the diameter of the steel strand 2, effectively reducing the wear of the steel strand 2 on the threaded plate 42 and the smooth plate 43 during tensioning. The steel strand 2 is a standard 1*7 structure (1 straight core wire + 6 screws The threaded ring 44 is fixedly connected to the middle part of the smooth sliding plate 43 on the side away from the threaded plate 42. After the excess steel strands 2 are cut off and before the ends are sealed, a clamping assembly located at the rear end of the anchoring plate 41 can be controlled by the threaded ring 44 to move spirally toward the front end of the anchoring plate 41, thereby effectively performing a rotational winding operation on multiple steel strands 2, and changing the multiple steel strands 2 located between the two clamping assemblies from a parallel state to a tangled state, thereby further enhancing the stable clamping effect of the steel strands 2 and the clip 5.

[0063] like Figure 11-12 、 Figure 15 The front end of the clip 5 is movably connected to the threaded plate 42, and the rear end of the clip 5 is fixedly connected to the smooth plate 43, which is used to clamp and fix the tensioned steel strand 2, thereby obtaining the required prestress.

[0064] like Figure 11-12 、 Figure 14 The limit member 7 is movably arranged between the threaded plate 42 and the smooth plate 43, which is used to ensure that the threaded plate 42 and the smooth plate 43 can rotate synchronously and realize the relative stillness of the threaded plate 42 and the smooth plate 43 in the radial direction, and is also used to control the axial distance between the threaded plate 42 and the smooth plate 43 and realize the relative movement of the threaded plate 42 and the smooth plate 43 in the axial direction.

[0065] Jack and electric oil pump, both ends of the steel strand 2 are movably connected with a jack, and the jack is connected to the electric oil pump. The electric oil pump can drive the jack to work, so that the steel strand 2 can be tensioned to generate prestress on the concrete component 1, thereby improving the compressive strength of the concrete component 1 during later use.

[0066] The limiter 7 is used to control the distance between the threaded plate 42 and the smooth plate 43 in each time period, so that the clip 5 and the steel strand 2 do not contact each other during tensioning, and the clip 5 and the steel strand 2 are engaged during de-tensioning, thereby effectively preventing the clip 5 and the steel strand 2 from continuous friction during tensioning and causing wear on both, enhancing the stable engagement effect of the clip 5 and the steel strand 2 during de-tensioning, and solving the problem that the steel strand 2 retracts due to the inability to be clamped and fixed, resulting in prestress loss and difficulty in meeting design requirements.

[0067] Example 2, based on Example 1, Figure 11-12 The number of the clips 5 is several, and the clips 5 are evenly arranged around the center of the threaded plate 42 or the smooth plate 43. The clips 5 are movably sleeved on the outside of the steel strand 2, so that the multiple steel strands 2 fixed with the clips 5 are in a parallel state during tensioning, so that the multiple steel strands 2 are stably tensioned. The clips 5 include a fixing block 51 and a fixing membrane 52, such as Figure 15The front end of the fixed block 51 is movably connected to the main through hole of the threaded plate 42, and the outer wall of the fixed block 51 is in contact with the inner wall of the main through hole. The inner wall of the fixed block 51 does not contact the outer wall of the steel strand 2 during tensioning, and is engaged with the inner wall of the steel strand 2 during de-tensioning. The rear end of the fixed block 51 is in contact with the side wall of the smooth plate 43, so that the fixed block 51 will be pushed by the smooth plate 43 and move along the main through hole of the threaded plate 42, thereby controlling the fixed block 51 to achieve whether it is engaged and fixed with the steel strand 2 The number of the fixing blocks 51 is four, and the four fixing blocks 51 are evenly arranged around the center of the main through hole or the auxiliary through hole, effectively ensuring the stability of the fixing blocks 51 in the radial direction to engage the steel strand 2. A fixing membrane 52 is fixedly connected between two adjacent fixing blocks 51. The front end of the fixing membrane 52 is movably connected to the main through hole of the threaded plate 42. An auxiliary groove is provided on the smooth slide plate 43 located outside the auxiliary through hole, and the smooth plate 43 is fixedly connected to the rear end of the fixing membrane 52 through the auxiliary groove. When assembled, the fixing membrane 5 When the clamp 51 is tightened, the fixing block 51 is tightened and the fixing block 51 is tightened, so that the fixing block 51 is tightened and the fixing block 51 is tightened.

[0068] like Figure 11-12 , two limiting members 7 are provided in a clamping assembly, and the limiting members 7 are located on the left and right sides of the threaded plate 42 or the smooth plate 43, and the limiting members 7 include a limiting rod 71 and a limiting block 72, such as Figure 14, a limit member 7 is correspondingly provided with an upper and lower limit rods 71, the limit rod 71 is composed of a rotating rod and a rotating bolt, and the rotating rod and the rotating bolt are spirally sleeved, that is, the installation and disassembly between the two can be achieved by rotation, the threaded plate 42 and the smooth plate 43 are both provided with connecting holes, and the connecting holes on the threaded plate 42 and the connecting holes on the smooth plate 43 are symmetrically arranged, and the two ends of the limit rod 71 are respectively engaged with the connecting holes of the threaded plate 42 and the connecting holes of the smooth plate 43. The limit rod 71 can be used to realize The threaded plate 42 and the smooth plate 43 are now stably connected, and the limit block 72 can be movably clamped between the upper and lower limit rods 71, and the limit block 72 is located between the threaded plate 42 and the smooth plate 43 when tensioning, effectively separating the threaded plate 42 and the smooth plate 43, thereby providing conditions for the clip 5 to not engage with the steel strand 2. The limit block 72 is located behind the smooth plate 43 when de-tensioning, effectively making the threaded plate 42 and the smooth plate 43 tightly fit, thereby providing conditions for the clip 5 to fully engage with the steel strand 2.

[0069] Example 3, based on Example 2, Figure 10-11 The opposite surfaces of the threaded plate 42 and the smooth plate 43 have opposite magnetism. When the threaded plate 42 and the smooth plate 43 do not need to be separated by the limit block 72, the two can attract each other due to the magnetic force, so that the smooth plate 43 can move toward the threaded plate 42 to achieve full fit between the two, thereby helping the clip 5 to be completely fitted into the main through hole and fully clamp and fix the steel strand 2.

[0070] Example 4: Based on Example 3, the clamping assembly further includes an air guide 6, such as Figure 11-12 , the circular plate outside the square plate of the anchoring plate 41 is provided with side holes on the left and right sides, which can monitor the status of each component in the anchoring plate 41 in real time to facilitate the operation of the air guide 6 and the limiter 7, and can also provide assistance for fully filling the anchor mechanism 4 during the subsequent end sealing. The smooth plate 43 is fixedly embedded with the air guide 6 inside, and the electric air pump is movably connected to the air guide 6 through the side hole of the anchoring plate 41. When tensioning, the air guide 6 is used to transport gas to the clip 5 to achieve multiple functions. The air guide 6 includes an air guide ring 61, an air guide pipe 62, an air inlet pipe 63 and an air outlet pipe 64. Figure 16-17, an air guide ring 61 is provided at the rear of each clip 5, and the air guide ring 61 is circular, and the two adjacent air guide rings 61 are fixedly connected by an air guide pipe 62, the number of the air inlet pipe 63 is two, and one end of the air inlet pipe 63 is fixedly connected to one of the air guide rings 61, and the other end of the air inlet pipe 63 is movably connected to the electric air pump, and an air outlet pipe 64 is fixedly connected to one side of the air guide ring 61, and the air outlet pipe 64 is connected to the fixed membrane 52. When the electric air pump is started, the gas can be evenly discharged into each fixed membrane 52 through the air inlet pipe 63, the air guide ring 61, the air guide pipe 62 and the air outlet pipe 64, thereby further expanding the fixed membrane 52, so as to achieve that the inner ring of the clip 5 does not contact the outer wall of the steel strand 2, further preventing the clip 5 and the steel strand 2 from continuous friction and causing wear of both.

[0071] like Figure 12 The inner wall of the fixed membrane 52 is provided with a number of small air holes, which can discharge the excess gas after the fixed membrane 52 expands in time, thereby accurately blowing and cooling the clip 5 and the steel strand 2, effectively preventing the steel strand 2 from accumulating heat during tensioning, which may cause the quality of the steel strand 2 and the clip 5 to be reduced or even damaged.

[0072] The working principle of the method of use of the present invention is as follows:

[0073] Before pouring, the steel frame is erected in the mold and the connecting mechanism 3 is buried therein, and then concrete is poured in the mold. When the strength of the poured concrete reaches the design value, the concrete component 1 is formed. Thereafter, the mold outside the concrete component 1 is removed, and then end grooves are opened on both sides of the concrete component 1, and the anchor mechanism 4 is installed in the end grooves of the concrete component 1 by bolts. At this time, the two clamping components have been installed in the anchor plate 41, and there is a space between the two clamping components. Then, the steel strand 2 is passed through the connecting mechanism 3 and the anchor mechanism 4.

[0074] When assembling the anchor plate 41 and the clamping assembly, first install the clip 5, movably install the front end of the fixing block 51 and the fixing membrane 52 in the main through hole of the threaded plate 42, and fix the rear end of the fixing membrane 52 in the auxiliary groove of the smooth plate 43, and then install the limit piece 7, pass the two ends of the limit rod 71 through the connecting holes of the threaded plate 42 and the smooth plate 43 respectively, and then install the limit block 72 between the upper and lower limit rods 71 ​​located between the threaded plate 42 and the smooth plate 43, that is, use the limit rod 71 and the limit block 72 to separate the threaded plate 42 and the smooth plate 43, and keep the threaded plate 42 and the smooth plate 43 relatively stationary, effectively making the clip 5 not completely fitted in the main through hole, so that the fixing block 51 fits against the inner wall of the main through hole under the elastic expansion of the fixing membrane 52, thereby reducing the friction between the two when the steel strand 2 passes through the clip 5 and improving the protection between the two.

[0075] During tensioning, the electric oil pump is started to drive the jack to tension the two ends of the steel strand 2. Since the outer wall of the steel strand 2 does not contact the inner circle of the clip 5 when the anchor mechanism 4 moves, it effectively prevents the clip 5 and the steel strand 2 from continuous friction and causing wear on both.

[0076] During the tensioning process, the electric air pump is started to deliver gas to the air guide 6, effectively applying an expansion force to the fixed membrane 52 to achieve full expansion of the fixed membrane 52, thereby pushing the fixed block 51 to fit the inner wall of the main through hole, further achieving that the inner circle of the clip 5 does not contact the outer wall of the steel strand 2, further preventing the clip 5 and the steel strand 2 from continuous friction and causing wear on both. In addition, since small air holes are provided on the fixed membrane 52, the excess gas in the fixed membrane 52 is effectively discharged, thereby accurately blowing and cooling the clip 5 and the steel strand 2, effectively preventing the steel strand 2 from accumulating heat during tensioning and causing the quality of the steel strand 2 and the clip 5 to be reduced or even damaged.

[0077] After tensioning and before de-tensioning, the limit block 72 is taken out from between the two limit rods 71 ​​through the side hole of the anchor plate 41. At this time, there is no obstruction between the threaded plate 42 and the smooth plate 43 and they are fully fitted together by the magnetic force, so that the clip 5 is pushed and completely sleeved in the main through hole, thereby clamping and fixing the clip 5 and the steel strand 2. Then the limit block 72 is installed between the upper and lower limit rods 71 ​​located behind the smooth plate 43 to further ensure the stability between the threaded plate 42 and the smooth plate 43.

[0078] During de-tensioning, the jack stops tensioning the steel strand 2. Due to the stable engagement effect between the clip 5 and the steel strand 2, the retraction amount of the steel strand 2 is reduced compared with traditional tensioning equipment, effectively solving the problem that the steel strand 2 retracts due to the inability to be clamped and fixed, resulting in prestress loss and difficulty in meeting design requirements.

[0079] After de-tensioning, the excess steel strands 2 are first cut off, and then the threaded ring 44 is used to control the clamping assembly at the rear end of the anchoring plate 41 to move spirally toward the front end of the anchoring plate 41, thereby effectively performing a rotational winding operation on the multiple steel strands 2, and changing the multiple steel strands 2 located between the two clamping assemblies from a parallel state to a winding state, thereby further enhancing the stable engagement effect of the steel strands 2 and the clips 5, and further solving the problem that the steel strands 2 retract due to the inability to be clamped and fixed, resulting in prestress loss and difficulty in meeting the design requirements, and then the feeding piece 35 is used to transport concrete into the connecting mechanism 3 to fill the connecting mechanism 3, and finally the end groove of the concrete component 1 is sealed.

[0080] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A prestressed member tensioning device for construction engineering, characterized in that: include: An anchoring plate (41), the anchoring plate (41) is composed of a square plate and a circular plate, and the circular plate is fixedly sleeved on the middle part of the square plate, and a threaded hole is opened in the middle part of the circular plate; A threaded plate (42), wherein the anchoring plate (41) is threadedly sleeved with the threaded plate (42) through a threaded hole; A smooth plate (43), wherein the anchoring plate (41) is movably connected to the smooth plate (43) through a threaded hole, and the smooth plate (43) is located behind the threaded plate (42); A steel strand (2), wherein a main through hole is formed on the threaded plate (42), and an auxiliary through hole is formed on the smooth plate (43), and the steel strand (2) passes through the main through hole and the auxiliary through hole; A clip (5), the clip (5) comprising a fixed block (51) and a fixed membrane (52), a fixed membrane (52) being fixedly connected between two adjacent fixed blocks (51), a front end of the fixed block (51) and a front end of the fixed membrane (52) being movably sleeved with the main through hole of the threaded plate (42), a rear end of the fixed block (51) being fitted with the side wall of the smooth plate (43), an auxiliary groove being provided on the smooth plate (43) located outside the auxiliary through hole, and a rear end of the fixed membrane (52) being fixedly sleeved with the auxiliary groove of the smooth plate (43); A limiting member (7), the limiting member (7) comprising a limiting rod (71) and a limiting block (72), the threaded plate (42) and the smooth plate (43) both being provided with connecting holes, and the two ends of the limiting rod (71) being movably engaged with the two connecting holes symmetrically arranged, an upper limiting rod (71) and a lower limiting rod (71) being provided in one limiting member (7), the limiting block (72) being movably engaged between the upper and lower limiting rods (71), and the limiting block (72) being located between the threaded plate (42) and the smooth plate (43) when tensioning, and being located behind the smooth plate (43) when retracting; The distance between the threaded plate (42) and the smooth plate (43) at each time period is controlled by the limiting member (7), so that the clamping piece (5) does not contact the steel strand (2) during tensioning, and the clamping piece (5) is engaged with the steel strand (2) during de-tensioning.

2. The construction engineering prestressed member tensioning equipment according to claim 1, characterized in that: The main through hole is in the shape of a truncated cone that is narrow in front and wide in the back, and the auxiliary through hole is in the shape of a cylinder. The minimum apertures of the main through hole and the auxiliary through hole are both larger than the diameter of the steel strand (2).

3. The construction engineering prestressed member tensioning equipment according to claim 2, characterized in that: The number of the clips (5) is several, and the several clips (5) are evenly arranged around the center of the threaded plate (42) or the smooth plate (43), and the clips (5) are movably sleeved on the outside of the steel strand (2). The clips (5) also include: The outer wall of the fixing block (51) fits with the inner wall of the main through hole. The number of the fixing blocks (51) is four, and the four fixing blocks (51) are evenly arranged around the center of the main through hole or the auxiliary through hole.

4. The construction engineering prestressed member tensioning equipment according to claim 3, characterized in that: The number of the limiting members (7) is two, and the two limiting members (7) are located on the left and right sides of the threaded plate (42) or the smooth plate (43).

5. The construction engineering prestressed member tensioning equipment according to claim 4, characterized in that: The facing surfaces of the threaded plate (42) and the smooth plate (43) have opposite magnetic properties.

6. The construction engineering prestressed member tensioning equipment according to claim 5, characterized in that: The threaded plate (42), the smooth plate (43), the clip (5) and the limiter (7) constitute a clamping assembly, two clamping assemblies are linearly arranged in the anchoring plate (41), and the two clamping assemblies constitute a group of clamping assemblies, the anchoring plate (41) and the group of clamping assemblies constitute an anchor mechanism (4), and there is an anchor mechanism (4) at each end of the steel strand (2), which is located on the clamping assembly at the rear end of the anchoring plate (41), and a threaded ring (44) is fixedly connected to the middle of the side of the smooth sliding plate (43) away from the threaded plate (42).

7. The construction engineering prestressed member tensioning equipment according to claim 6, characterized in that: The clamping assembly further comprises: The air guide (6) is located on the left and right sides of the circular plate outside the square plate of the anchoring plate (41) and has side holes, and the air guide (6) is fixedly embedded in the interior of the smooth plate (43).

8. The construction engineering prestressed member tensioning equipment according to claim 7, characterized in that: The air guide (6) comprises: An air guide ring (61), wherein an air guide ring (61) is provided behind each of the clips (5), and the air guide ring (61) is circular; An air guide tube (62), wherein two adjacent air guide rings (61) are fixedly connected to each other via the air guide tube (62); An air intake pipe (63), wherein the number of the air intake pipes (63) is two, and one end of the air intake pipe (63) is fixedly connected to one of the air guide rings (61); An air outlet pipe (64) is fixedly connected to one side of the air guide ring (61), and the air outlet pipe (64) is connected to the fixed membrane (52). The inner wall surface of the fixed membrane (52) is provided with a plurality of small air holes.

9. The construction engineering prestressed member tensioning equipment according to claim 8, characterized in that: Also includes: A concrete component (1), wherein end grooves are formed at both ends of the concrete component (1), and the end grooves of the concrete component (1) are movably connected to the anchor mechanism (4) via bolts; A connecting mechanism (3) is provided inside the concrete component (1).

10. The construction engineering prestressed member tensioning equipment according to claim 9, characterized in that: The connecting mechanism (3) comprises: A bellows (31), wherein the concrete component (1) is movably sleeved with the bellows (31); A guide tube (32), wherein both ends of the bellows (31) are respectively fixedly sleeved with a guide tube (32), and the guide tube (32) is fitted with the anchor plate (41), and the steel strand (2) is movable through the bellows (31) and the guide tube (32); A spiral rib (33), wherein the outer portion of the guide tube (32) is fixedly sleeved with the spiral rib (33), and the spiral rib (33) is located on one side of the anchoring plate (41); A connecting pipe (34), wherein the top end of the corrugated pipe (31) is fixedly connected to one end of the connecting pipe (34), and the other end of the connecting pipe (34) passes through the interior of the concrete component (1); A material conveying member (35), wherein the top end of one of the guide tubes (32) is fixedly connected to the material conveying member (35), and the material conveying member (35) passes through the anchoring plate (41).

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