Screwing device for prestress tensioning machine and prestress tensioning machine

Abstract

The utility model discloses a screwing device for a prestress tensioning machine and the prestress tensioning machine. The screwing device for the prestress tensioning machine comprises a counter-force frame, an elastic installation assembly, a screwing ring and a screwing driver, wherein the elastic installation assembly is installed on the counter-force frame and can stretch out and draw back in the longitudinal direction, the screwing ring is rotatably installed at the longitudinal end of the elastic installation assembly, and the screwing driver drives the screwing ring to rotate. Wherein the screwing ring is provided with a screwing hole which is matched with and accommodates the outer peripheral wall of the large tensioning nut, and the screwing hole is provided with a polygonal hole and a longitudinal gradual transition hole. The screwing drive drives the screwing ring to rotate, then the large tensioning nut matched with the screwing ring is driven to rotate, the large tensioning nut longitudinally moves in the rotating process, longitudinal abutting force is given to the screwing ring through the elastic mounting assembly, and the screwing ring can continuously abut against the large tensioning nut in the longitudinal moving process of the large tensioning nut. Therefore, the screwing ring can continuously screw the large tensioning nut in the rotating process, and the large tensioning nut is automatically screwed to move to abut against the tensioning retaining wall.

Description

Technical Field

[0001] The utility model relates to the technical field of prestressed tensioning machines, in particular to a screwing device for a prestressed tensioning machine and a prestressed tensioning machine. Background Art

[0002] During the production of precast piles, a prestressing tensioning machine is required to prestress the steel cage as a whole. Specifically, one end of the steel cage is connected to the tensioning plate, one end of the tensioning wire rod is connected to the tensioning plate, and the other end passes through the tensioning retaining wall, and is provided with a tensioning large nut for contacting the tensioning retaining wall and a tensioning small nut for connecting with the tensioning machine; during tensioning, the prestressing tensioning machine clamps the tensioning small nut and longitudinally tensions the tensioning wire rod, thereby achieving tensioning of the precast pile steel cage. After tensioning is completed or during tensioning, the tensioning large nut needs to be screwed in the direction close to the tensioning retaining wall, so that the tensioning large nut is screwed to contact the tensioning retaining wall, thereby preventing the tensioning wire rod from retracting, thereby causing the steel cage to retract, resulting in failure of tensioning the steel cage.

[0003] The existing prestressed tensioning machine includes a screwing device for screwing the tensioning large nut and a tensioning device for connecting the tensioning small nut and tensioning it. The screwing device includes a clamping mechanism and a rotation drive for driving the clamping mechanism to rotate. The clamping mechanism includes two arc blocks arranged opposite to each other and a clamping power source for driving the two arc blocks to radially clamp the tensioning large nut. Its working principle is: the clamping power source drives the two arc blocks to clamp the tensioning large nut, and the rotation drive drives the clamping mechanism to rotate synchronously to achieve the screwing of the tensioning large nut. In actual application, after the screwing device screws the tensioning large nut to move the tensioning large nut toward the tensioning retaining wall for a certain displacement, there is a situation where the screwing device is disconnected from the tensioning large nut, resulting in the inability to continue to screw the tensioning large nut to move it to abut the tensioning retaining wall, and manual screwing operation is required again, or it directly leads to failure of tensioning the steel cage. Summary of the invention

[0004] The utility model aims to provide a screwing device for a prestressed tensioning machine, so as to solve the problem that the existing screwing device cannot screw the tensioning large nut into place.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A screwing device for a prestressed tensioning machine comprises a reaction frame, an elastic mounting assembly mounted on the reaction frame and capable of longitudinal extension and contraction, a screwing ring rotatably mounted on one longitudinal end of the elastic mounting assembly, and a screwing drive for driving the screwing ring to rotate;

[0007] The screwing ring has a screwing hole adapted to accommodate the outer peripheral wall of the tensioned large nut, and the screwing hole has a polygonal hole and a longitudinal gradual transition hole.

[0008] Compared with the prior art, the utility model has the following beneficial effects: the screwing drive drives the screwing ring to rotate, and then drives the tensioning nut matched with the screwing ring to rotate, and the tensioning nut moves longitudinally during the rotation process, and the elastic mounting assembly gives the screwing ring a longitudinal thrust, so that the screwing ring can continuously abut against the tensioning nut during the longitudinal movement of the tensioning nut, so that the screwing ring can continuously screw the tensioning nut during the rotation process, and realize the automatic screwing of the tensioning nut to abut the tensioning retaining wall. In addition, the tensioning nut is sleeved in the polygonal hole through the longitudinal gradient transition hole guide, which facilitates the tensioning nut to enter the screwing hole to form an adaptation with the screwing ring and realize synchronous rotation.

[0009] On the basis of the above solution, a longitudinal inner retaining ring is provided at one longitudinal end of the reaction frame;

[0010] The elastic mounting assembly comprises a supporting ring which can move longitudinally relative to the longitudinal inner retaining ring, and an elastic member with two ends respectively abutting against the longitudinal inner retaining ring and the supporting ring, wherein the screwing ring can be rotatably mounted on the supporting ring.

[0011] On the basis of the above solution, the reaction frame is cylindrical, and a notch is opened on the reaction frame at a position corresponding to the screw ring;

[0012] And / or, the opening of the longitudinal gradual transition hole is a trumpet hole, and the longitudinal gradual transition hole has a plurality of circumferentially continuous crescent-shaped hole walls.

[0013] On the basis of the above solution, the screwing ring can slide longitudinally relative to the output end of the screwing drive;

[0014] And / or, a longitudinal guide is provided between the longitudinal inner stop ring and the support ring.

[0015] On the basis of the above solution, the longitudinal guide member comprises a telescopic rod longitudinally mounted on the support ring or the longitudinal inner retaining ring;

[0016] Or, the longitudinal inner retaining ring is provided with a longitudinal through hole, the longitudinal guide member comprises a guide rod which is mounted on the support ring and longitudinally penetrates the through hole, and a stop nut is mounted on the end of the guide rod away from the support ring;

[0017] Wherein, the elastic member is sleeved on the longitudinal guide member.

[0018] Based on the above scheme, the screwing drive includes a screwing power source, a driving gear driven by the screwing power source, and a driven gear meshing with the driving gear. The outer periphery of the screwing ring is provided with a gear ring meshing with the driven gear.

[0019] Based on the above solution, the tooth thickness of the driven gear is greater than the longitudinal retractable length of the elastic member.

[0020] In addition, the utility model also provides a prestressed tensioning machine, which includes the above-mentioned screwing device for the prestressed tensioning machine, a tensioning drive device installed on the reaction frame, and a tensioning connection device driven by the tensioning drive device to move longitudinally in the reaction frame.

[0021] On the basis of the above scheme, the tensioning driving device comprises an outer cylinder body installed at the other longitudinal end of the reaction frame, a piston rod which can reciprocate longitudinally relative to the outer cylinder body, and a tensioning shaft which moves longitudinally synchronously with the piston rod, and the tensioning connecting device is installed at one longitudinal end of the tensioning shaft;

[0022] And / or, the tensioning connection device includes a tensioning sleeve installed on the tensioning drive device and facing the elastic mounting assembly, a radial clamp installed on the tensioning sleeve and used to clamp the tensioning wire rod, the radial clamp includes a clamping member, a clamping drive installed on the tensioning sleeve and driving the clamping member to clamp the tensioning wire rod, and the tensioning sleeve has a radial window for the clamping member to radially pass through.

[0023] On the basis of the above scheme, it also includes a moving device, which includes a transverse moving assembly, a lifting assembly arranged on the transverse moving assembly, and a longitudinal moving assembly installed on the lifting assembly, the outer cylinder body is installed on the longitudinal moving assembly, and a shock absorber is provided between the tensioning drive device and the longitudinal moving assembly;

[0024] And / or, the reaction frame is provided with a strip-shaped clearance groove for longitudinal displacement of the tensioning connection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional view of a screwing device for a prestressing tensioning machine;

[0026] Figure 2 It is a cross-sectional view of a prestressing tensioning machine;

[0027] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0028] Figure 4 It is a structural schematic diagram of a prestressed tensioning machine;

[0029] Figure 5 It is a structural schematic diagram of some parts of the prestressing tensioning machine;

[0030] Figure 6 for Figure 5 Enlarged view of middle part B;

[0031] Figure 7 It is a structural schematic diagram of some parts of the prestressing tensioning machine;

[0032] Figure 8 for Figure 7 Enlarged view of middle C;

[0033] Fig. 9 It is a structural schematic diagram of some parts of the prestressing tensioning machine;

[0034] Fig.10 It is a structural schematic diagram of some parts of the prestressing tensioning machine;

[0035] Fig.11 It is a structural schematic diagram of the reaction frame;

[0036] Fig.12 It is a structural schematic diagram of the tension sleeve;

[0037] Fig.13 It is a structural schematic diagram of a prestressed tensioning machine;

[0038] Fig.14 It is a schematic diagram of the coordination between the prestressed tensioning machine, the tensioning retaining wall, the tensioning large nut, the tensioning wire rod, and the tensioning small nut;

[0039] Reference numerals:

[0040] 1. Elastic mounting assembly;

[0041] 11. reaction frame; 111. longitudinal inner retaining ring; 112. strip-shaped clearance groove; 113. notch; 114. longitudinal through hole;

[0042] 12. Support ring; 13. Elastic member; 14. Longitudinal guide member; 141. Guide rod; 142. Limit nut;

[0043] 2. Screw ring; 21. Screw hole; 211. Longitudinal gradual transition hole; 212. Polygonal hole; 22. Gear ring; 23. Fastening ring;

[0044] 3. Twisting drive; 31. Output end; 32. Twisting power source; 33. Driving gear; 34. Driven gear;

[0045] 4. tensioning connection device; 41. tensioning sleeve; 411. window; 42. radial clamp; 421. clamping member; 422. clamping drive;

[0046] 5. tensioning drive device; 51. tensioning shaft; 52. outer cylinder body; 53. piston rod;

[0047] 6. Mobile device;

[0048] 61, transverse movement assembly; 611, transverse movement unit; 612, transverse movement drive; 613, transverse movement frame;

[0049] 62, lifting assembly; 621, shaft sleeve; 622, guide shaft; 623, lifting drive; 624, lifting frame; 625, longitudinal guide rail;

[0050] 63. longitudinal movement assembly; 631. longitudinal movement unit; 632. longitudinal movement frame;

[0051] 64. shock absorber; 65. base;

[0052] 7. Tension retaining wall; 71. Tension large nut; 72. Tension wire rod; 73. Tension small nut;

[0053] 9. Transverse guide rail;

[0054] 100. Twisting device for prestressed tensioning machine; 200. Prestressed tensioning machine. DETAILED DESCRIPTION

[0055] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0056] In this article, the terms "upper, lower, inside, outside" and the like are established based on the positional relationships shown in the drawings. The corresponding positional relationships may also change depending on the drawings, and therefore cannot be understood as absolute limitations on the scope of protection; moreover, relational terms such as "first" and "second" and the like are merely used to distinguish one component from another with the same name, and do not necessarily require or imply any actual relationship or order between these components.

[0057] In this embodiment, the direction of the X-axis is the longitudinal direction, that is, the axial direction of the reaction frame 11, which is also the direction in which the prestressed tensioning machine 200 tensions the steel cage, which is also the longitudinal movement direction of the prestressed tensioning machine 200; the direction of the Y-axis is the transverse direction, which is also the transverse movement direction of the prestressed tensioning machine 200; the direction of the Z-axis is the vertical direction, which is also the lifting and lowering direction of the prestressed tensioning machine 200.

[0058] Embodiment 1

[0059] See also Figures 1 to 3 , Figure 13 to Figure 14 The present embodiment provides a screwing device 100 for a prestressed tensioning machine, which includes a reaction frame 11, an elastic mounting assembly 1 installed on the reaction frame 11 and capable of longitudinal extension and contraction, a screwing ring 2 rotatably installed on one longitudinal end of the elastic mounting assembly 1, and a screwing drive 3 for driving the screwing ring 2 to rotate; wherein the screwing ring 2 has a screwing hole 21 adapted to accommodate the outer peripheral wall of the tensioning large nut 71, and the screwing hole 21 has a polygonal hole 212 and a longitudinal gradient transition hole 211.

[0060] Specifically, when the tensioning machine is tensioning, the tensioning nut 71 on the tensioning wire rod 72 moves with the tensioning wire rod 72, so that a gap is generated between the tensioning nut 71 and the tensioning retaining wall 7, the reaction frame 11 abuts against the tensioning retaining wall 7, and the tensioning nut 71 pushes the screwing ring 2 and the elastic mounting assembly 1, so that the elastic mounting assembly 1 is in a compressed state. When the screwing drive 3 drives the screwing ring 2 to rotate, it can drive the tensioning nut 71 adapted to the screwing ring 2 to rotate, and in the process of the tensioning nut 71 rotating and moving longitudinally, the screwing ring 2 can be continuously sleeved on the tensioning nut 71 by the reset thrust of the elastic mounting assembly 1, that is, when the screwing ring 2 rotates, the tensioning nut 71 can be continuously screwed until the tensioning nut 71 is screwed to abut the tensioning retaining wall 7.

[0061] In the present embodiment, the reaction frame 11 refers to a reaction member that abuts against the tension retaining wall 7 when the tensioning nut 71 is screwed, so that the elastic mounting assembly 1 installed thereon is compressed by the tensioning nut 71, so that during the process of screwing the tensioning nut 71, the elastic mounting assembly 1 can give the screwing ring 2 a reset force to continuously abut against the tensioning nut 71, so as to ensure that the tensioning nut 71 is screwed and moved to abut against the tensioning retaining wall 7. Therefore, the reaction frame 11 only needs to meet the above functions, and the structure, shape and setting method of the reaction frame 11 are not strictly limited.

[0062] In detail, when the elastic mounting assembly 1 is in an uncompressed state, the end of the screwing ring 2 at one end of the elastic mounting assembly 1 is at least flush with the end of the reaction frame 11, or protrudes from the end of the reaction frame 11. In addition, when the screwing drive 3 drives the screwing ring 2 to rotate, if the tensioning large nut 71 is not inserted into the polygonal hole 212, the screwing ring 2 will first rotate to make the polygonal hole 212 fit the tensioning large nut 71 during the rotation process, and the screwing ring 2 is pushed by the elastic mounting assembly 1 to be inserted outside the tensioning large nut 71, and then the screwing ring 2 drives the tensioning large nut 71 to rotate.

[0063] The specific shape and structure of the screw hole 21 are not strictly limited, as long as they can fit the outer peripheral wall of the tensioning nut 71 and can screw the tensioning nut 71. Preferably, see Figure 8 , Figure 1 The outer peripheral wall of the tensioning nut 71 is multi-deformed, and the screw hole 21 includes a polygonal hole 212 and a longitudinal gradual transition hole 211. The polygonal hole 212 is adapted to the polygonal outer peripheral wall of the tensioning nut 71. The longitudinal gradual transition hole 211 is located at the longitudinal end of the screw ring 2 facing the tensioning retaining wall 7. Its function is to facilitate guiding the tensioning nut 71 into the polygonal hole 212.

[0064] Based on the above scheme, see Fig.11 , Figures 1 to 3A longitudinal inner retaining ring 111 is provided at one longitudinal end of the reaction frame 11; the function of the longitudinal inner retaining ring 111 is to provide a longitudinal reaction force so as to facilitate the tensioning of the large nut 71 and the longitudinal compression of the elastic mounting assembly 1, that is, the reaction frame 11 provides the longitudinal reaction force through the longitudinal inner retaining ring 111. The form and structure of the longitudinal inner retaining ring 111 are not strictly limited, as long as it can provide a longitudinal reaction force for the tensioning of the large nut 71 and the longitudinal compression of the elastic mounting assembly 1. Therefore, in this example, the longitudinal inner retaining ring 111 can be two or more circumferentially adjacent split ring pieces or circumferentially sequentially connected split ring pieces, and the ring pieces can even be set as retaining pieces of unlimited shape. Preferably, see Figures 1 to 3 , Fig.11 The longitudinal inner retaining ring 111 is an integral annular structure. The longitudinal inner retaining ring 111 can be an integral structure with the reaction frame 11, or can be fixed to the reaction frame 11 by fasteners.

[0065] See also Figures 1 to 8 The elastic mounting assembly 1 includes a support ring 12 that can move longitudinally relative to the longitudinal inner stop ring 111, and an elastic member 13 whose two ends are respectively abutted against the longitudinal inner stop ring 111 and the support ring 12, wherein the screwing ring 2 can be rotatably mounted on the support ring 12. Specifically, the installation method of the elastic member 13 is not strictly limited, and it can be installed on the longitudinal inner stop ring 111 or the support ring 12, as long as its two ends are longitudinally abutted against the longitudinal inner stop ring 111 and the support ring 12. The installation method of the screwing ring 2 on the support ring 12 is not limited, as long as the screwing ring 2 can rotate relative to the support ring 12. Preferably, see Figures 1 to 3 , the screwing ring 2 has a longitudinal annular groove on the outer peripheral wall of the screwing ring 2 on the longitudinal side away from the screwing hole 21, and a fastening ring 23 is installed on the side of the longitudinal annular groove of the screwing ring 2. The fastening ring 23 and the annular groove of the screwing ring 2 together form a longitudinal groove, so that the support ring 12 can be firmly stuck in the longitudinal groove, avoiding the problem of unstable installation of the screwing ring 2 on the support ring 12 and easy falling. Among them, the elastic member 13 can be an elastic structure such as a spring, a leaf spring, an elastic rubber tube, etc., and the elastic member 13 is preferably a spring, and a longitudinal guide member 14 is provided between the longitudinal inner retaining ring 111 and the support ring 12. The structure, shape, setting method, etc. of the longitudinal guide member 14 are not strictly limited, as long as the spring can be mounted thereon to achieve longitudinal guidance. The longitudinal guide member 14 can be a telescopic rod longitudinally installed on the support ring 12 or the longitudinal inner retaining ring 111, or refer to Figures 1 to 3 , Figures 5 to 8 , Fig.11 The longitudinal inner stop ring 111 is provided with a longitudinal through hole 114. The longitudinal guide member 14 includes a guide rod 141 which is installed on the support ring 12 and longitudinally passes through the through hole. A stop nut 142 is installed at the end of the guide rod 141 away from the support ring 12. The elastic member 13 is mounted on the longitudinal guide member 14 and is located between the support ring 12 and the longitudinal inner stop ring 111.

[0066] Based on the above scheme, see Figures 1 to 4 , Fig.11 The reaction frame 11 is cylindrical, and a notch 113 is provided in the reaction frame 11 at a position corresponding to the screwing ring 2; the notch 113 serves as an escape path for the screwing drive 3, so that the screwing drive 3 can drive the screwing ring 2 to rotate.

[0067] Based on the above scheme, see Figures 1 to 4 The opening of the longitudinal gradual transition hole 211 is a trumpet hole, and the longitudinal gradual transition hole 211 has a plurality of circumferentially continuous crescent-shaped hole walls. The opening shape of the longitudinal gradual transition hole 211 is not strictly limited, as long as it is convenient for the tensioning large nut 71 to be introduced into the polygonal hole 212 in the screw hole 21. In this embodiment, the diameter of the trumpet hole gradually changes from large to small until it is the same as the diameter of the polygonal hole 212, ensuring that the tensioning large nut 71 quickly and safely enters the polygonal hole 212.

[0068] Based on the above scheme, see Figures 1 to 3 , Figure 6 The screwing ring 2 can slide longitudinally relative to the output end 31 of the screwing drive 3, so that when the elastic mounting assembly 1 pushes the screwing ring 2 to move longitudinally, the screwing ring 2 can still be connected to the screwing drive 3, and the screwing drive 3 can continuously drive the screwing ring 2 during the movement of the screwing ring 2, ensuring that the tensioning large nut 71 can be screwed and moved to abut the tensioning retaining wall 7.

[0069] Based on the above scheme, see Figure 5 , Figure 6 The screwing drive 3 includes a screwing power source 32, a driving gear 33 driven by the screwing power source 32, and a driven gear 34 meshing with the driving gear 33. The outer periphery of the screwing ring 2 is provided with a gear ring 22 meshing with the driven gear 34. Through the multi-stage transmission of the screwing power source 32, the driving gear 33, the driven gear 34, and the gear ring 22, the rotation speed of the screwing ring 2 can be better controlled, so that the tensioning large nut 71 can be better introduced into the screwing hole 21.

[0070] Based on the above scheme, see Figure 5 , Figure 6 In order to prevent the tooth thickness (i.e., longitudinal length) of the driven gear 34 from being too short, which may cause the screwing ring 2 to be disengaged from the driven gear 34 when the longitudinal displacement is too long, thereby causing the driven gear 34 to be unable to drive the screwing ring 2 to rotate, in this embodiment, the tooth thickness of the driven gear 34 is set to be greater than the longitudinal retractable length of the elastic member 13.

[0071] Embodiment 2

[0072] The same parts in this embodiment as those in the first embodiment are given the same figure marks, and the same text descriptions are omitted.

[0073] This embodiment provides a prestressed tensioning machine 200, which includes the prestressed tensioning machine screwing device 100 in the first embodiment. Figures 2 to 14 The prestressed tensioning machine 200 also includes a tensioning driving device 5 installed on the reaction frame 11, and a tensioning connecting device 4 driven by the tensioning driving device 5 to move longitudinally in the reaction frame 11.

[0074] Specifically, during tensioning, the tensioning connection device 4 is first connected to the tensioning small nut 73, and the tensioning drive device 5 drives the tensioning connection device 4 to move so as to tension the tensioning wire rod 72, and then tension the steel cage until the prestressing reaches a preset value (specified value). At this time, the tensioning drive device 5 maintains oil pressure to ensure that the screwing device 100 performs the screwing work. Of course, the screwing device 100 can also perform the screwing work while tensioning, without specific limitation, and is set according to actual conditions.

[0075] In detail, the tensioning connection device 4 can be arranged in the reaction frame 11, and the screwing device 100 is located at one end of the tensioning connection device 4 close to the tensioning retaining wall 7, one end of the reaction frame 11 abuts against the tensioning retaining wall 7, and the other end is installed with the tensioning drive device 5. Of course, the screwing device 100 can also include a reaction frame 1, and the tensioning machine 200 includes a reaction frame 2. The reaction frame 1 and the reaction frame 2 can be an integrated structure, that is, equivalent to the aforementioned reaction frame 11, and the reaction frame 1 and the reaction frame 2 can be a split structure. The reaction frame 1 is arranged at the end of the reaction frame 2, and the other end of the reaction frame 1 abuts against the tensioning retaining wall 7, and the other end of the reaction frame 2 is installed with the tensioning drive device 5, and the tensioning connection device 4 is installed in the reaction frame 2, without limiting the specific situation, and can realize the tensioning of the steel cage and ensure that the tensioning large nut 71 can be screwed into place.

[0076] Based on the above scheme, see Figure 2 , Fig.13 , Fig.14 The tensioning drive device 5 includes an outer cylinder body 52 installed at the other longitudinal end of the reaction frame 11, a piston rod 53 that can move longitudinally reciprocatingly relative to the outer cylinder body 52, and a tensioning shaft 51 that moves longitudinally synchronously with the piston rod 53. The tensioning connection device 4 is installed at one longitudinal end of the tensioning shaft 51.

[0077] See also Figures 2 to 14 The tensioning connection device 4 includes a tensioning sleeve 41 installed on the tensioning drive device 5 and facing the longitudinal inner retaining ring 111, a radial clamper 42 installed on the tensioning sleeve 41 and used to clamp the tensioning wire rod 72, and the radial clamper 42 includes a clamping member 421, a clamping drive 422 installed on the tensioning sleeve 41 and driving the clamping member 421 to clamp the tensioning wire rod 72, see Fig.12 The tension sleeve 41 is radially provided with a window 411 for the clamping member 421 to radially penetrate. Figures 9 and 10In this embodiment, the radial clamp 42 is two clamping members 421 that are arranged opposite to each other and adapted to the outer peripheral wall of the tensioning rod 72. The clamping members 421 are arc-shaped clamping blocks. Of course, other clamping members 421 can also be selected. There is no strict limitation on the structure and setting method of the clamping members 421, as long as they can clamp the tensioning rod 72 so that the tensioning nut 73 can be stuck in the tensioning sleeve 41 to facilitate the tensioning of the tensioning shaft 51.

[0078] Based on the above scheme, see Figure 13 to Figure 14 The prestressed tensioning machine 200 also includes a moving device 6, which includes a transverse movement component 61, a lifting component 62 arranged on the transverse movement component 61, and a longitudinal movement component 63 installed on the lifting component 62. The outer cylinder body 52 is installed on the longitudinal movement component 63, and a shock absorber 64 is provided between the tensioning drive device 5 and the longitudinal movement component 63.

[0079] For details, see Figure 13 to Figure 14 The transverse moving assembly 61 includes a transverse moving part 611 arranged on the transverse moving guide rail 9, a transverse moving frame 613 arranged on the transverse moving part 611, and a transverse moving drive 612. A transverse moving wheel is arranged at the lower end of the transverse moving part 611, and the transverse moving drive 612 drives the transverse moving wheel to move on the transverse moving guide rail 9.

[0080] See also Figure 13 to Figure 14 The lifting assembly 62 includes a lifting frame 624 disposed above the transverse frame 613, a lifting drive 623 mounted on the transverse frame 613 and connected to the lifting frame 624 through its lifting drive rod, and a shaft sleeve 621 mounted on the lifting frame 624. A vertical guide shaft 622 is mounted on the transverse frame 613, and the lifting frame 624 is sleeved on the guide shaft 622 through the shaft sleeve 621. The lifting drive 623 drives the lifting frame 624 to rise and fall along the guide shaft 622. A longitudinal guide rail 625 is provided on the lifting frame 624.

[0081] See also Figure 13 to Figure 14 The longitudinal moving assembly 63 includes a longitudinal moving part 631 disposed on the longitudinal moving guide rail 625 and capable of longitudinally moving along the longitudinal moving guide rail 625, a longitudinal moving frame 632 disposed on the longitudinal moving part 631, and a longitudinal moving drive disposed on the longitudinal moving frame 632 or the lifting frame 624 for driving the longitudinal moving part 631 to longitudinally move. A longitudinal moving walking wheel is disposed at the lower end of the longitudinal moving part 631.

[0082] See also Figure 2 , Figure 4 , Figure 13 to Figure 14 The prestressed tensioning machine 200 further includes a base 65 connecting the reaction frame 11 and the tensioning driving device 5. The base 65 is arranged on the longitudinal moving frame 632 and a shock absorber 64 is arranged between the two.

[0083] See also Fig.11 , Fig.13 , Fig.14The reaction frame 11 is provided with a strip-shaped clearance groove 112 for the longitudinal displacement of the tensioning connection device 4, so as to perform longitudinal tensioning on the tensioning wire rod 72.

[0084] In this embodiment, the prestressed tensioning machine 200 is capable of performing a trinity displacement in the horizontal, longitudinal and vertical directions, so that it can move to a suitable position to tension the tensioning wire rod 72, and is provided with a shock absorber 64, which can keep the prestressed tensioning machine 200 horizontal, facilitate alignment between the prestressed tensioning machine 200 and the large tensioning nut 71 and the small tensioning nut 73, and prevent the prestressed tensioning machine 200 from tilting and damaging the tensioning wire rod 72.

[0085] The screwing power source 32, clamping drive 422, lateral drive 612, lifting drive 623, and longitudinal drive in the above embodiments 1 and 2 can be any one of a pneumatic cylinder, an oil cylinder, and an electric cylinder, which are all existing technologies and will not be described here.

[0086] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A screwing device for a prestressed tensioning machine, characterized in that: It comprises a reaction frame (11), an elastic mounting assembly (1) mounted on the reaction frame (11) and capable of longitudinal extension and contraction, a screwing ring (2) rotatably mounted on one longitudinal end of the elastic mounting assembly (1), and a screwing drive (3) for driving the screwing ring (2) to rotate; The screwing ring (2) has a screwing hole (21) adapted to accommodate the outer peripheral wall of the tensioning large nut (71), and the screwing hole (21) has a polygonal hole (212) and a longitudinal gradual transition hole (211).

2. The screwing device for a prestressed tensioning machine according to claim 1, characterized in that: A longitudinal inner retaining ring (111) is provided at one longitudinal end of the reaction frame (11); The elastic mounting assembly (1) comprises a support ring (12) which can move longitudinally relative to the longitudinal inner stop ring (111), and an elastic member (13) whose two ends respectively abut against the longitudinal inner stop ring (111) and the support ring (12), wherein the screwing ring (2) can be rotatably mounted on the support ring (12).

3. The screwing device for a prestressed tensioning machine according to claim 2, characterized in that: The reaction frame (11) is cylindrical, and a notch (113) is formed on the reaction frame (11) at a position corresponding to the screw ring (2); And / or, the opening of the longitudinal gradual transition hole (211) is a trumpet hole, and the longitudinal gradual transition hole (211) has a plurality of circumferentially continuous crescent-shaped hole walls.

4. The screwing device for a prestressed tensioning machine according to claim 3, characterized in that: The screwing ring (2) can slide longitudinally relative to the output end (31) of the screwing drive (3); And / or, a longitudinal guide member (14) is provided between the longitudinal inner stop ring (111) and the support ring (12).

5. The screwing device for a prestressed tensioning machine according to claim 4, characterized in that: The longitudinal guide member (14) comprises a telescopic rod longitudinally mounted on the support ring (12) or the longitudinal inner retaining ring (111); Alternatively, the longitudinal inner stop ring (111) is provided with a longitudinal through hole (114), the longitudinal guide member (14) comprises a guide rod (141) mounted on the support ring (12) and longitudinally penetrating the through hole, and a stop nut (142) is mounted on the end of the guide rod (141) away from the support ring (12); Wherein, the elastic member (13) is sleeved on the longitudinal guide member (14).

6. The screwing device for a prestressed tensioning machine according to claim 2, characterized in that: The screwing drive (3) comprises a screwing power source (32), a driving gear (33) driven by the screwing power source (32), and a driven gear (34) meshing with the driving gear (33). The outer periphery of the screwing ring (2) is provided with a gear ring (22) meshing with the driven gear (34).

7. The screwing device for a prestressed tensioning machine according to claim 6, characterized in that: The tooth thickness of the driven gear (34) is greater than the longitudinally retractable length of the elastic member (13).

8. Prestressed tensioning machine, characterized in that: It comprises a screwing device (100) for a prestressed tensioning machine as claimed in any one of claims 1 to 7, a tensioning drive device (5) installed on a reaction frame (11), and a tensioning connection device (4) driven by the tensioning drive device (5) to move longitudinally in the reaction frame (11).

9. The prestressed tensioning machine according to claim 8, characterized in that: The tensioning drive device (5) comprises an outer cylinder body (52) mounted on the other longitudinal end of the reaction frame (11), a piston rod (53) capable of longitudinal reciprocating movement relative to the outer cylinder body (52), and a tensioning shaft (51) that moves longitudinally synchronously with the piston rod (53), and the tensioning connection device (4) is mounted on one longitudinal end of the tensioning shaft (51); And / or, the tensioning connection device (4) comprises a tensioning sleeve (41) mounted on the tensioning drive device (5) and facing the elastic mounting assembly (1), a radial clamp (42) mounted on the tensioning sleeve (41) and used to clamp the tensioning wire rod (72), the radial clamp (42) comprising a clamping member (421), a clamping drive (422) mounted on the tensioning sleeve (41) and driving the clamping member (421) to clamp the tensioning wire rod (72), and the tensioning sleeve (41) radially opens a window (411) for the clamping member (421) to radially pass through.

10. The prestressed tensioning machine according to claim 9, characterized in that: It also includes a moving device (6), the moving device (6) including a transverse moving assembly (61), a lifting assembly (62) provided on the transverse moving assembly (61), and a longitudinal moving assembly (63) installed on the lifting assembly (62), the outer cylinder (52) being installed on the longitudinal moving assembly (63), and a shock absorber (64) being provided between the tensioning drive device (5) and the longitudinal moving assembly (63); And / or, the reaction frame (11) is provided with a strip-shaped clearance groove (112) for the longitudinal displacement of the tension connection device (4).

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