Pipe pulling and threading device for steel strand laying based on bridge erection

Abstract

The application provides a pipe pulling and bundle penetrating device for steel strand laying based on bridge erection, which comprises a moving vehicle body, pipe pulling mechanisms and a power assembly. The moving vehicle body is provided with walking wheels at the bottom. The moving vehicle body is provided with a moving platform which can move in space. The pipe pulling mechanisms are provided in two, and the two pipe pulling mechanisms are arranged in parallel and at intervals in the horizontal direction. Each pipe pulling mechanism is provided with an elastic chain transmission traction part. The two elastic chain transmission traction parts form a clamping channel for the passing of rubber pipes or steel strands. The power assembly is connected with the pipe pulling mechanisms, and can make the two pipe pulling mechanisms move relatively or in opposite directions, so as to adjust the clamping channel. The pipe pulling and bundle penetrating device for steel strand laying based on bridge erection can greatly reduce the frequency and time consumption of position adjustment, guarantee the continuity of pipe pulling and bundle penetrating operation, and the elastic characteristics of the elastic chain transmission traction part can adapt to slight size fluctuations on the surface of the rubber pipe or the steel strand, so that slipping is effectively avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bridge construction equipment, and particularly relates to a pipe pulling and strand threading device for laying steel strand based on bridge erection. BACKGROUND

[0002] The bearing capacity of a prefabricated concrete bridge is controlled by steel strand that is precisely controlled by a tensioning process and is threaded in a reserved hole. In the prefabricated bridge construction, a rubber tube is first threaded in a reinforcing member, and the rubber tube is pulled out to form a reserved hole after initial setting of concrete pouring; then the steel strand is threaded in the reserved hole, and then tensioning, anchoring and other operations are performed. The pipe pulling and strand threading of the rubber tube usually involves a pipe pulling and strand threading machine.

[0003] In the prior art, there are many reserved holes, and the positions thereof are distributed, so the pipe pulling and strand threading machine needs to be constantly replaced in the use process, and the pipe pulling and strand threading machine needs to be aligned with the reserved hole after each position replacement. This process is time-consuming and laborious, and seriously reduces the construction efficiency. In addition, the pipe pulling and strand threading process involves two directions, and the continuity of the pipe pulling and strand threading process needs to be ensured, so a chain transmission mode is usually used for pulling operation. However, in the process of realizing continuous pulling and threading, slipping occurs, and the use effect is not good. SUMMARY

[0004] The embodiment of the application provides a pipe pulling and strand threading device for laying steel strand based on bridge erection, which aims to solve the poor practicality problem of the existing pipe pulling and strand threading machine due to inconvenient position adjustment and easy slipping in the continuous pulling and threading process.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows: a pipe pulling and strand threading device for laying steel strand based on bridge erection is provided, which comprises:

[0006] The mobile vehicle body has walking wheels at the bottom; the mobile vehicle body has a mobile platform that can move in space;

[0007] The pulling and threading mechanisms are provided in two, the two pulling and threading mechanisms are horizontally and spaced apart, each pulling and threading mechanism has an elastic chain transmission traction part; the two elastic chain transmission traction parts form a clamping channel for the rubber tube or the steel strand to pass through;

[0008] The power assembly is connected with the pulling and threading mechanisms, and is used to make the two pulling and threading mechanisms relatively move or move away from each other, so as to adjust the clamping channel;

[0009] After the mobile vehicle body is fixed, the position of the mobile platform is adjusted, so that the clamping channels correspond to the plurality of reserved holes respectively.

[0010] In a possible implementation, the mobile vehicle body has a length direction and a width direction arranged horizontally;

[0011] The mobile vehicle body comprises:

[0012] A base, wherein the traveling wheels are arranged at the bottom of the base; a vertical fixing frame is fixed on the base;

[0013] A lifting platform having a sliding platform arranged horizontally; the lifting platform is connected to a lifting structure arranged on the vertical fixing frame in a sliding manner, so as to be lifted and moved under the driving of the lifting structure;

[0014] A lower sliding frame connected to the sliding platform along the length direction; the lower sliding frame is connected to a second telescopic structure arranged on the lifting platform;

[0015] An upper sliding frame connected to the lower sliding frame along the width direction; the upper sliding frame is connected to a third telescopic structure arranged on the lower sliding frame; and the upper sliding frame is the mobile platform.

[0016] In a possible implementation, the lifting structure comprises:

[0017] A vertical sliding frame connected to the vertical fixing frame in a vertical sliding manner; the top of the vertical sliding frame has two lifting sprockets arranged along the width direction; and the vertical sliding frame is connected to the lifting platform in a sliding manner;

[0018] A first telescopic structure arranged vertically, with a bottom end connected to the bottom end of the vertical fixing frame and a top end connected to the vertical sliding frame;

[0019] Two lifting chains, each of which is connected to one of the two lifting sprockets; one end of each of the lifting chains is connected to the lifting platform, and the other end of each of the lifting chains is connected to a fixed crossbar arranged on the vertical fixing frame after passing through the corresponding lifting sprocket.

[0020] In a possible implementation, the first telescopic structure, the second telescopic structure and the third telescopic structure are all hydraulic cylinders;

[0021] The base is provided with a plurality of oil pumps, and each of the oil pumps is arranged in a one-to-one matching manner with the first telescopic structure, the second telescopic structure and the third telescopic structure.

[0022] In a possible implementation, the through direction of the clamping channel is arranged in the same direction as the width direction.

[0023] In a possible implementation, each of the pulling-out mechanisms comprises:

[0024] A slide block is connected to a slide rod disposed in the upper slide along the length direction;

[0025] Two rotating shafts are provided, which are spaced apart along the width direction and each rotating shaft is vertically arranged. Each rotating shaft is rotatably mounted on the slide. A transmission sprocket is coaxially connected to each rotating shaft. A driver is connected to one of the rotating shafts.

[0026] The drive chain is wound in a loop around the two drive sprockets;

[0027] Multiple clamping blocks are provided, and each clamping block is spaced apart on the transmission chain along the direction of the transmission chain. Each clamping block has an arc-shaped cavity, and the inner wall of the arc-shaped cavity is provided with multiple arc-shaped grooves at intervals. The surface of each clamping block is covered with a wear-resistant rubber layer. All the clamping blocks are combined to form the elastic chain transmission traction part.

[0028] In one possible implementation of the pull-through mechanism, the slide in one of the pull-through mechanisms is fixed to the slide rod; the slide in the other pull-through mechanism is slidably disposed on the slide rod and connected to the power assembly.

[0029] The power assembly includes a fourth telescopic structure, which is fixed on the upper slide and connected to the slidably mounted slide block.

[0030] In another possible implementation of the pull-through mechanism, the slide in each of the pull-through mechanisms is slidably connected to the slide rod;

[0031] The power assembly includes:

[0032] A rotating disk is rotatably mounted on the upper slide and located below the two slide blocks; the rotation axis of the rotating disk is arranged along the vertical direction; the outer edge of the rotating disk is provided with two hinge ends, which are arranged circumferentially around the axis of the rotating disk.

[0033] There are two pull rods, each corresponding to one of the two slides or the two hinge ends; one end of each pull rod is rotatably connected to the corresponding slide, and the other end is rotatably connected to the corresponding hinge end.

[0034] The fifth telescopic structure is fixed on the upper slide and connected to one of the slide blocks.

[0035] In one possible implementation, the steel strand laying device based on bridge erection further includes a guide roller group, which is set on the moving platform and distributed at both ends of the clamping channel.

[0036] Compared with the prior art, the walking wheels arranged at the bottom of the moving vehicle body can ensure that the whole device is quickly moved to the construction area, without the need to rely on large lifting equipment for transfer, thereby reducing the preparation cost and time cost in the early stage. The spatially movable moving platform arranged on the moving vehicle body can correspond to multiple distributed reserved holes through the adjustment of the moving platform after the whole device is fixed, without the need to repeatedly adjust the position of the vehicle body, thereby greatly reducing the frequency and time consumption of position adjustment and ensuring the continuity of the pipe pulling and bundle threading operation. The two horizontally parallel and spaced apart pulling and threading mechanisms each have an elastic chain transmission traction part, and the clamping channel formed by the two pulling and threading mechanisms can adapt to the pulling and threading requirements of the two kinds of rubber pipes or steel strands, without the need to replace the device for pipe pulling and bundle threading, thereby further improving the operation continuity. The elastic characteristics of the elastic chain transmission traction part can adapt to slight size fluctuations on the surface of the rubber pipe or steel strand, thereby avoiding the problem of too large or too tight clamping gap caused by slight diameter deviation of the rubber pipe or steel strand. The power assembly can accurately adjust the width of the clamping channel by driving the two pulling and threading mechanisms to move relative to or away from each other, thereby ensuring the clamping effect. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 Structure diagram of the pipe pulling and bundle threading device for steel strand laying based on bridge erection provided by the embodiment of the present application Figure 1 ;

[0038] Figure 2 Structure diagram of the pipe pulling and bundle threading device for steel strand laying based on bridge erection provided by the embodiment of the present application Figure 2 ;

[0039] Figure 3 Structure diagram of the pipe pulling and bundle threading device for steel strand laying based on bridge erection provided by the embodiment of the present application Figure 1 ;

[0040] Figure 4 Structure diagram of the pipe pulling and bundle threading device for steel strand laying based on bridge erection provided by the embodiment of the present application Figure 1 ;

[0041] Figure 5 Structure diagram of the pipe pulling and bundle threading device for steel strand laying based on bridge erection provided by the embodiment of the present application Figure 1 ;

[0042] Figure 6 Structure diagram of the pipe pulling and bundle threading device for steel strand laying based on bridge erection provided by the embodiment of the present application Figure 2 ;

[0043] Figure 7 Structure diagram of the pipe pulling and bundle threading device for steel strand laying based on bridge erection provided by the embodiment of the present applicationFigure 5 An enlarged structural schematic diagram of point C of the steel strand laying puller and threading device based on bridge erection provided in the embodiment;

[0044] Figure 8 for Figure 6 An enlarged structural schematic diagram of point D of the steel strand laying device for bridge erection provided in the embodiment;

[0045] Figure 9 A schematic plan view of another embodiment of the power component in the steel strand laying device for bridge erection provided in this invention. Figure 1 (The process of removing the tube);

[0046] Figure 10 A schematic plan view of another embodiment of the power component in the steel strand laying device for bridge erection provided in this invention. Figure 1 (The process of threading the needle).

[0047] Explanation of reference numerals in the attached figures:

[0048] 10. Moving vehicle body; 11. Base; 111. Vertical fixing frame; 12. Lifting platform; 13. Lower slide frame; 14. Upper slide frame; 141. Slide rod; 15. Lifting structure; 151. Vertical slide frame; 152. Lifting sprocket; 153. First telescopic structure; 154. Lifting chain; 16. Second telescopic structure; 17. Third telescopic structure;

[0049] 20. Pulling-out mechanism; 21. Slide; 22. Rotating shaft; 23. Drive chain; 24. Clamping block; 241. Arc groove; 25. Driver; 26. Drive sprocket;

[0050] 30. Power assembly; 31. Fourth telescopic structure; 32. Rotary disc; 33. Pull rod; 34. Fifth telescopic structure; 341. Abutment plate; 342. Compression spring; 36. Pushing slide column; 361. Sleeve; 37. Cable; 371. Limiting plate; 372. Compression spring;

[0051] 40. Rubber hose;

[0052] 50. Steel strand;

[0053] 60. Cables;

[0054] 70. Guide roller assembly. Detailed Implementation

[0055] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other manners different from those described herein, and those skilled in the art can make similar generalizations without departing from the spirit and scope of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0056] The directional terms or approximate terms such as "front", "back", "left", "right", "top", "bottom", "inner", "outer", "side" and the like described throughout the present application are mainly with reference to the directions of the drawings, and the directional terms or approximate terms are only used to assist the description and understanding of the embodiments of the present application, and are not used to limit the present application.

[0057] Please refer to Figures 1 to 10 , now the steel strand 50 laying pipe pulling device based on bridge erection provided by the present application will be described. The steel strand 50 laying pipe pulling device based on bridge erection, comprising a mobile vehicle body 10, a pulling mechanism 20 and a power assembly 30. The mobile vehicle body 10 has walking wheels at the bottom. The mobile vehicle body 10 has a mobile platform that can move in space. The pulling mechanism 20 is provided with two, two pulling mechanisms 20 are arranged in parallel and spaced apart in the horizontal direction, and each pulling mechanism 20 has an elastic chain transmission traction part. The two elastic chain transmission traction parts form a clamping channel for the rubber pipe 40 or the steel strand 50 to pass through. The power assembly 30 is connected with the pulling mechanism 20, which can make the two pulling mechanisms 20 move relatively or move away from each other, so as to adjust the clamping channel.

[0058] Wherein, after keeping the mobile vehicle body 10 fixed, the position of the mobile platform is adjusted, so that the clamping channel corresponds to a plurality of reserved holes respectively.

[0059] Compared with the prior art, the walking wheels arranged at the bottom of the mobile vehicle body 10 can ensure that the whole device moves quickly to the construction area, without the need to rely on large lifting equipment for transfer, thereby reducing the preparation cost and time cost in the early stage. The spatially movable moving platform arranged on the mobile vehicle body 10 can correspond to multiple distributed reserved holes through the adjustment of the moving platform after the whole device is fixed, without the need to repeatedly adjust the position of the vehicle body, thereby greatly reducing the frequency and time consumption of position adjustment and ensuring the continuity of the pipe pulling and bundle threading operation. The two horizontally parallel and spaced apart pulling and threading mechanisms 20 are both provided with elastic chain transmission traction parts, and the clamping channel formed by the two pulling and threading mechanisms 20 can adapt to the pulling and threading requirements of the rubber pipe 40 and the steel strand 50, without the need to replace the device for pipe pulling and bundle threading, thereby further improving the operation continuity. The elastic characteristics of the elastic chain transmission traction parts can adapt to slight size fluctuations on the surface of the rubber pipe 40 or the steel strand 50, thereby avoiding the problems of too large or too tight clamping gap caused by slight diameter deviation of the rubber pipe 40 or the steel strand 50. The power assembly 30 can precisely adjust the width of the clamping channel by driving the two pulling and threading mechanisms 20 to move relative to or away from each other, thereby ensuring the clamping effect.

[0060] In some embodiments, the mobile vehicle body 10 described above can adopt the structure as shown in Figures 1 to 4 . Referring to Figures 1 to 4 , the mobile vehicle body 10 has a length direction and a width direction arranged horizontally.

[0061] The mobile vehicle body 10 includes a base 11, a lifting platform 12, a lower sliding frame 13, an upper sliding frame 14, a lifting structure 15, a second telescopic structure 16, and a third telescopic structure 17. The walking wheels of the base 11 are arranged at the bottom of the base 11. The base 11 is fixedly provided with a vertical fixing frame 111. The lifting platform 12 has a sliding platform arranged horizontally. The lifting platform 12 is slidably connected to the lifting structure 15 arranged on the vertical fixing frame 111, so as to be lifted and moved under the driving of the lifting structure 15. The lower sliding frame 13 is connected to the sliding platform along the length direction, and the lower sliding frame 13 is connected to the second telescopic structure 16 arranged on the lifting platform 12. The upper sliding frame 14 is connected to the lower sliding frame 13 along the width direction, and the upper sliding frame 14 is connected to the third telescopic structure 17 arranged on the lower sliding frame 13. The upper sliding frame 14 is a moving platform.

[0062] The base 11 and the traveling wheels provide a stable moving basis for the device, and the vertical fixing frame 111 provides a support carrier for the lifting adjustment. The lifting platform 12 moves in the vertical direction through the lifting structure 15, and the height of the clamping channel can be accurately adjusted according to the height difference of the reserved holes. When the height of the reserved holes in different areas of the prefabricated bridge is different, the base 11 does not need to be raised or lowered, and the height can be adjusted only by the lifting structure 15, avoiding the inclination caused by the instability of the base 11, and preventing the rubber pipe 40 or the steel strand 50 from deviating and jamming in the clamping channel. The lower slide 13 is connected with the sliding platform along the length direction of the moving vehicle body 10 and is driven by the second telescopic structure 16, so that the position of the reserved hole distributed along the length direction can be adjusted. The upper slide 14 is connected with the lower slide 13 along the width direction and is driven by the third telescopic structure 17, so that the reserved hole distributed along the width direction can be adjusted. Through the three-dimensional layered adjustment structure of the lifting structure 15, the second telescopic structure 16 and the third telescopic structure 17, the moving platform can cover any position of the reserved hole in the space, and the adjustment accuracy is much higher than the existing extensive adjustment mode of the whole moving, which provides accurate position guarantee for continuous pulling.

[0063] From the perspective of improving the continuity and stability of the operation, the layered adjustment structure does not need to disassemble or move the whole device. All adjustment actions can be completed after the base 11 is fixed through the lifting structure 15, the second telescopic structure 16 and the third telescopic structure 17. The adjustment process is fast and does not need to interrupt the pulling operation. After completing the pulling of a reserved hole in the length direction, only the second telescopic structure 16 is driven to move the lower slide 13, so that the clamping channel can be aligned with the next reserved hole in the length direction. The whole process is time-saving and easy to operate, which greatly improves the operation efficiency. At the same time, the adjustment action driven by each telescopic structure is stable without violent shaking or deviation, which can ensure that the clamping channel and the reserved hole are always coaxially aligned, avoid local wear or jamming of the rubber pipe 40 or the steel strand 50 caused by eccentric force, further reduce the risk of slipping, and strengthen the stability of the pipe pulling and bundle penetrating.

[0064] In this embodiment, a plurality of support legs can be provided on the base 11, each support leg is arranged along the vertical direction, and the base 11 can be lifted after the position of the base 11 is confirmed to make each traveling wheel out of contact with the ground, so as to further ensure the stability of the base 11. This technology is the prior art, and will not be described here.

[0065] In some embodiments, the lifting structure 15 described above can adopt the structure as shown in Figures 2 to 3 The lifting structure 15 can be connected with the base 11 through a lifting mechanism 150, and the lifting mechanism 150 can be driven by a lifting motor 151 to drive the lifting structure 15 to move in the vertical direction. Figures 2 to 3The lifting structure 15 includes a vertical sliding frame 151, a lifting sprocket 152, a first telescopic structure 153, and a lifting chain 154. The vertical sliding frame 151 is in sliding connection with the vertical fixed frame 111 in the vertical direction. The top of the vertical sliding frame 151 is provided with two lifting sprockets 152, which are arranged in the width direction. The vertical sliding frame 151 is in sliding connection with the lifting platform 12. The first telescopic structure 153 is arranged vertically, with the bottom end connected to the bottom end of the vertical fixed frame 111 and the top end connected to the vertical sliding frame 151. The lifting chain 154 is provided with two chains, each corresponding to one of the two lifting sprockets 152. One end of each lifting chain 154 is connected to the lifting platform 12, and the other end is connected to a fixed horizontal rod arranged on the vertical fixed frame 111 after passing through the corresponding lifting sprocket 152.

[0066] From the stability of the lifting structure 15, the vertical sliding frame 151 is in sliding connection with the vertical fixed frame 111 in the vertical direction, forming a stable lifting guide path, which can avoid the left and right shaking or deviation of the lifting platform 12 during lifting. The two lifting sprockets 152 arranged in the width direction at the top of the vertical sliding frame 151, in cooperation with the two lifting chains 154, make the lifting platform 12 bear force evenly in the vertical direction, ensuring that the lifting platform 12 always maintains a horizontal state. This horizontally stable lifting state ensures that the clamping channel always maintains coaxial with the reserved hole during height adjustment, avoiding the deviation and jamming of the rubber pipe 40 or the steel strand 50 in the clamping channel due to the inclination of the lifting, thereby preventing slipping and providing vertical protection for stable pulling.

[0067] In addition, the first telescopic structure 153 (such as a hydraulic cylinder) is arranged vertically, with the bottom end connected to the bottom end of the vertical fixed frame 111 and the top end connected to the vertical sliding frame 151, which can provide stable and controllable driving force. Through the lifting sprocket 152 and the lifting chain 154, it can be ensured that the lifting platform 12 can move two distances after the first telescopic structure 153 drives the vertical sliding frame 151 to move one distance, thereby ensuring the height adjustment efficiency and ensuring a large stroke for height adjustment, which can cover a large vertical distance. By controlling the extension amount of the first telescopic structure 153, the lifting platform 12 can be accurately adjusted to the target height without repeated trial and error adjustment, reducing the adjustment time and ensuring the continuity of the operation.

[0068] In some embodiments, the first telescopic structure 153, the second telescopic structure 16, and the third telescopic structure 17 described above can adopt the structure as shown in Figures 1 to 4 Figures 1 to 4 The first telescopic structure 153, the second telescopic structure 16, and the third telescopic structure 17 are all hydraulic cylinders.

[0069] ​The base 11 is provided with a plurality of oil pumps, and each oil pump is matched with the first telescopic structure 153, the second telescopic structure 16 and the third telescopic structure 17.

[0070] From the performance advantages of the hydraulic cylinder, the hydraulic cylinder has the characteristics of large driving force, stable operation and high adjustment precision, and can better adapt to the clamping and pulling of heavy rubber pipes 40 or steel strands 50 in bridge construction. During the pipe pulling process, the friction between the rubber pipe 40 and the inner wall of the reserved hole is large, and the hydraulic cylinder can provide sufficient clamping driving force and pulling driving force to ensure that the rubber pipe 40 or steel strand 50 does not slip. At the same time, the running speed of the hydraulic cylinder is stable and controllable, without violent jumping or jamming, which can avoid the position deviation of the clamping channel caused by the sudden change of the telescopic structure, thereby preventing the rubber pipe 40 or steel strand 50 from being jammed due to uneven stress in the clamping channel, and ensuring the stability of the pulling process.

[0071] Each telescopic structure corresponds to an independent oil pump, which can realize independent control of each telescopic structure. This independent control mode can make the adjustment of the moving platform in three-dimensional direction more accurate. When aligning a certain reserved hole, the height can be adjusted by the first telescopic structure 153, the length can be adjusted by the second telescopic structure 16, and the width can be fine-tuned by the third telescopic structure 17. Each step does not interfere with each other, which ensures the accurate alignment of the clamping channel and the reserved hole, and reduces the jamming caused by alignment deviation.

[0072] In some embodiments, the above-mentioned clamping channel can adopt the structure as shown in Figures 1 to 2 . Referring to Figures 1 to 2 , the through direction of the clamping channel is arranged in the same direction as the width direction.

[0073] The through direction of the clamping channel is arranged in the same direction as the width direction, which can be coordinated with the width direction adjustment of the upper slide 14. When the upper slide 14 moves along the width direction to align different reserved holes, the passing direction of the rubber pipe 40 or steel strand 50 is always consistent with the adjustment direction, and the outlet of the clamping channel is always opposite to the inlet of the reserved hole, so it is not necessary to adjust the through direction of the channel while adjusting the width, which simplifies the operation steps, reduces the adjustment time, and ensures the continuity of the operation. At the same time, this structure can also ensure that the clamping channel approaches the reserved hole along with the upper slide 14, so as to adapt to the fixed position of the base 11, and also ensure the pulling effect.

[0074] In some embodiments, the above-mentioned pulling mechanism 20 can adopt the structure as shown in Figures 5 to 8 . Referring to Figures 5 to 8Each pulling mechanism 20 comprises a sliding seat 21, a rotating shaft 22, a transmission chain 23, a clamping block 24 and a transmission sprocket 26. The sliding seat 21 is connected with a sliding rod 141 arranged in the upper sliding frame 14 along the length direction. The rotating shaft 22 is provided with two rotating shafts 22 arranged along the width direction and each rotating shaft 22 is arranged along the vertical direction and each rotating shaft 22 is rotatably arranged on the sliding seat 21. Each rotating shaft 22 is coaxially connected with the transmission sprocket 26. One of the rotating shafts 22 is connected with a driver 25. The transmission chain 23 is arranged in a ring shape on the two transmission sprockets 26. The clamping block 24 is provided with a plurality of clamping blocks 24 arranged on the transmission chain 23 along the direction of the transmission chain 23. Each clamping block 24 has an arc-shaped cavity and a plurality of arc-shaped grooves 241 are arranged on the inner wall of the arc-shaped cavity. The surface of each clamping block 24 is covered with a wear-resistant rubber layer. The clamping blocks 24 are combined to form an elastic chain transmission traction part.

[0075] From the design of the clamping block 24, a plurality of clamping blocks 24 are arranged along the direction of the transmission chain 23 to form an elastic chain transmission traction part. The arc-shaped cavity of each clamping block 24 can be fitted with the arc-shaped contact surface of the rubber pipe 40 or the steel strand 50, which greatly increases the contact area of the clamping. The design of the arc-shaped cavity can uniformly distribute the clamping force on the surface of the rubber pipe 40 or the steel strand 50, avoid damage to the rubber pipe 40 or the steel strand 50 caused by excessive local force, and avoid slipping caused by too small local force. The plurality of arc-shaped grooves 241 on the inner wall of the clamping block 24 further increase the friction force on the surface of the rubber pipe 40 or the steel strand 50. Even if there is slight oil stain or impurity on the surface of the rubber pipe 40 or the steel strand 50, the arc-shaped grooves 241 can also play a biting role to prevent the rubber pipe 40 or the steel strand 50 from slipping in the clamping channel. The wear-resistant rubber layer on the surface of the clamping block 24 has elasticity and can adapt to rubber pipes 40 or steel strands 50 of different diameters (such as steel strands 50 of different specifications). The elastic deformation of the rubber compensates for the slight difference in the diameter of the rubber pipe 40 or the steel strand 50, ensures that the clamping force is always stable, avoids slipping caused by an increase in the clamping gap due to size fluctuations of the rubber pipe 40 or the steel strand 50, and also avoids damage to the rubber pipe 40 or the steel strand 50 caused by excessive clamping.

[0076] The two vertically arranged rotating shafts 22 are spaced apart along the width direction, and the transmission sprockets 26 thereon drive the transmission chain 23 to move in a ring shape. The driver 25 provides stable power to the rotating shaft 22 to make the transmission chain 23 realize uniform and continuous traction. The chain transmission structure can realize continuous pulling of the rubber pipe 40 or the steel strand 50 without frequent starting and stopping, which avoids the impact and position deviation of the rubber pipe 40 or the steel strand 50 caused by starting and stopping, and ensures the continuity of the pulling operation. At the same time, the rotating connection of the rotating shaft 22 and the sliding seat 21 ensures the smooth running of the transmission chain 23 without violent shaking, which can make the clamping block 24 always stably clamp the rubber pipe 40 or the steel strand 50, and avoid the fluctuation of the clamping force caused by the shaking of the chain.

[0077] The sliding seat 21 is connected with the sliding rod 141 in the upper sliding frame 14, which provides the basis for the relative movement of the pulling-through mechanism 20, and can cooperate with the power assembly 30 to adjust the clamping channel width, further optimizing the clamping effect.

[0078] As an embodiment of the power assembly 30 and the pulling-through mechanism 20, the above-mentioned power assembly 30 and the pulling-through mechanism 20 can adopt the structure as shown in Figures 5 to 6 Figures 5 to 6 The sliding seat 21 in one of the pulling-through mechanisms 20 is fixedly arranged on the sliding rod 141. The sliding seat 21 in the other pulling-through mechanism 20 is slidably arranged on the sliding rod 141, and is connected with the power assembly 30.

[0079] The power assembly 30 includes a fourth telescopic structure 31, which is fixedly arranged on the upper sliding frame 14 and connected with the slidably arranged sliding seat 21.

[0080] This scheme adopts a single-sided sliding and single-sided fixed adjustment method, which is simple in structure. Only the fourth telescopic structure 31 is needed to drive the sliding sliding seat 21 (movable sliding seat 21) to change the relative distance between the two pulling-through mechanisms 20, thereby adjusting the clamping channel width. It has fewer components, fewer failure points, and only needs to control one telescopic structure during operation, without the need to coordinate bilateral actions, thereby reducing the operation difficulty and failure probability. When replacing the rubber pipe 40 and the steel strand 50 with different diameters, only the fourth telescopic structure 31 needs to be started to push the sliding sliding seat 21 to approach or move away from the fixed sliding seat 21 (fixedly arranged sliding seat 21), so as to quickly adjust the clamping channel width. The whole adjustment process takes a short time and does not need to interrupt the pulling-through operation for too long, thereby ensuring the operation continuity.

[0081] The fourth telescopic structure 31 can provide stable and controllable driving force, and can accurately control the movement distance of the sliding sliding seat 21, thereby accurately adjusting the clamping channel width. According to the diameter of the steel strand 50, the clamping channel width can be adjusted to the optimal range that can ensure the clamping force and not damage the rubber pipe 40 or the steel strand 50, thereby avoiding the problem of too tight or too loose clamping caused by excessive adjustment.

[0082] Regarding the fixation of the fixed sliding seat 21, the sixth telescopic structure can be connected therewith, and the sixth telescopic structure is separately controlled to adjust the position of the fixed sliding seat 21.

[0083] As another embodiment of the power assembly 30 and the pulling-through mechanism 20, the above-mentioned power assembly 30 and the pulling-through mechanism 20 can adopt the structure as shown in Figure 5 , Figure 6 and Figure 9 . Referring to Figure 5 , Figure 6 and Figure 9 , the sliding seat 21 in each pulling-through mechanism 20 is slidably connected with the sliding rod 141. ​

[0084] The power assembly 30 comprises a rotating disc 32, a pull rod 33 and a fifth telescopic structure 34. The rotating disc 32 is rotationally arranged on the upper slide 14 and located below the two slide blocks 21. The rotation axis of the rotating disc 32 is arranged along the vertical direction. Two hinged ends are arranged at the outer edge of the rotating disc 32 and annularly spaced around the axis of the rotating disc 32. Two pull rods 33 are arranged, and each of the two pull rods 33 corresponds to one of the two slide blocks 21 or one of the two hinged ends. One end of each pull rod 33 is rotationally connected to the corresponding slide block 21, and the other end is rotationally connected to the corresponding hinged end. The fifth telescopic structure 34 is fixedly arranged on the upper slide 14 and connected to one of the slide blocks 21.

[0085] The scheme provides another adjustment mode of the pulling mechanism 20. The slide blocks 21 of the two pulling mechanisms 20 are both sliding. The power assembly 30 comprises a rotating disc 32, a pull rod 33 and a fifth telescopic structure 34. One of the slide blocks 21 is pushed by the fifth telescopic structure 34, and the rotating disc 32 is driven to rotate around the vertical axis. The two hinged ends at the outer edge of the rotating disc 32 synchronously pull the other slide block 21 through the pull rod 33, so as to realize the synchronous relative or opposite movement of the two slide blocks 21. This symmetrical adjustment mode can ensure that the movement distances of the two slide blocks 21 are completely equal, and the width of the clamping channel uniformly changes. When adjusting the width of the clamping channel, the two slide blocks 21 simultaneously move towards the center or move towards the two sides. The clamping force of the clamping block 24 on the rubber pipe 40 or the steel strand 50 is always uniformly distributed on the two sides of the rubber pipe 40 or the steel strand 50, so that the rubber pipe 40 or the steel strand 50 is not deviated or jammed due to the excessive force on one side, thereby preventing slipping and greatly improving the clamping stability.

[0086] From the center position stability, since the two slide blocks 21 move synchronously, the center axis position of the clamping channel always remains unchanged, regardless of the adjustment of the width of the clamping channel. The center is always aligned with the axis of the reserved hole, so that the position of the moving platform does not need to be re-adjusted after the width is adjusted, the adjustment steps and time are reduced, and the operation continuity is ensured.

[0087] In addition, the cooperation of the rotating disc 32 and the pull rod 33 can smoothly convert the linear motion of the fifth telescopic structure 34 into the synchronous motion of the two slide blocks 21, and the power transmission has no sharp impact, so that the adjustment process is stable. The power is branched by the rotating disc 32, which further improves the adjustment accuracy and ensures the stable operation of the pulling operation for a long time.

[0088] In this embodiment, the above-mentioned power assembly 30 can also adopt the structures shown in Figure 9 and Figure 10 . Referring to Figure 9 and Figure 10, set two hinged end is the first hinged end and the second hinged end. Correspondingly, the fifth telescopic structure 34 telescopic end is provided with abutment plate 341, while in the corresponding slide 21 is provided with the fifth telescopic structure 34 telescopic end into the limiting cavity, the limiting cavity and abutment plate 341 between the extrusion spring 342, extrusion spring 342 can be elastic abutment plate 341 continuously have the tendency to abut the slide 21.

[0089] Based on this, the power assembly 30 can also include:

[0090] Pushing slide column 36, along the width direction slidingly arranged on the upper carriage 14, one end of the pushing slide column 36 has a long strip sliding port arranged along the length direction, which can be connected with the first hinged end. The other end of the pushing slide column 36 extends out of the upper carriage 14, and a sleeve 361 is threadedly connected to the extending end of the pushing slide column 36.

[0091] The other end of the pulling cable 37 is connected with the second hinged end, and the other end extends out through the slide hole on the upper carriage 14. The other end of the pulling cable 37 is provided with a limiting plate 371, and a compression spring 372 is arranged between the limiting plate 371 and the upper carriage 14. The limiting plate 371 is provided with a hook portion, which can be connected with the concrete prefabricated bridge through the external cable 60.

[0092] The reason for slipping is that the local force of the rubber tube 40 or the steel strand 50 is transmitted to the reverse force of the clamping channel, which is greater than the clamping force, that is, the friction between the rubber tube 40 or the steel strand 50 and the clamping channel. As for the sudden change of local force, the reaction time of the fifth telescopic structure 34 is not enough to deal with such sudden situation. Therefore, the pushing slide column 36 is provided, which can participate Figure 9 When the rotating disc 32 rotates counterclockwise, it will drive the two slides 21 to move relative to each other, and when it rotates clockwise, it will drive the two slides 21 to move away from each other. Correspondingly, the first hinged end is located on the right side, and the second hinged end is located on the left side.

[0093] Please refer to Figure 9 and Figure 10In actual work process, two operation modes of pulling through are involved, and the larger dotted line represents the sliding block 21. During the pulling process of the tube, the pulling-through mechanism 20 will be subjected to the traction force of the rubber tube 40, so that the whole device has a tendency to move close to the prefabricated bridge. The upper slide 14 is in a high position, and after the local force is stuck, it will be closer to the prefabricated bridge. During the threading process, the pulling-through mechanism 20 will be subjected to the thrust force of the steel strand 50, so that the whole device has a tendency to move away from the prefabricated bridge. The upper slide 14 is in a high position, and after the local force is stuck, it will be farther away from the prefabricated bridge. However, the above-mentioned close or far away is relatively subtle, which can be observed by naked eye, and slipping is easy to occur at this time. The traditional way usually directly adjusts the fifth telescopic structure 34 at this time, that is, further reduces the width of the clamping channel and further provides clamping force. However, this adjustment method needs to be maintained after adjustment. After the stuck condition is over, the clamping force still needs to be maintained. In the case of excessive clamping force, the steel strand 50 will be deformed due to clamping.

[0094] Therefore, the pushing slide 36 is arranged, which can be connected with the first hinge end in a sliding manner. The sliding direction is arranged along the length direction to adapt to the displacement of the first hinge end in the length direction. One end of the slide extends out of the upper slide 14, and a sleeve 361 is arranged in a matched manner. Please refer to Figure 9 The structure can be used in the pulling process of the tube. After the pulling-through structure is clamped on the rubber tube 40, the position of the upper slide 14 and the pulling-through mechanism 20 is stable after the rubber tube 40 is pulled a distance. The position of the outer end of the sleeve 361 is adjusted by rotating the sleeve 361, so that the sleeve 361 directly abuts against the prefabricated bridge. In the subsequent pulling process, if the rubber tube 40 is pulled in the opposite direction after the stuck condition occurs, the pushing slide 36 will give the first hinge end an outward thrust, so that the rotating disc 32 slightly rotates counterclockwise, and then the two sliding blocks 21 are relatively moved by the two pull rods 33, so that the clamping force is further increased, the self-adjusting function is formed, the instantaneous response is realized, the stuck condition caused by the increase of local force is solved, and the slipping is avoided.

[0095] Meanwhile, a cable 37 is arranged, one end of the cable 37 is connected with the second hinge end, a limiting plate 371 and a compression spring 372 are arranged at the end of the cable 37 extending out of the upper slide 14, so as to ensure the rotation of the rotating disc 32 and avoid the limitation or interference caused by the insufficient length of the cable 37. The structure can be used in the transmission process, after the transmission structure clamps the steel strand 50, preferably after the steel strand 50 is pulled through a distance, and the position of the upper slide 14 and the pulling mechanism 20 is stable, the hook is connected with the anchoring member anchored on the prefabricated concrete bridge through the external cable 60. The cable 60 needs to have the function of tightening, for example, the cable 60 is annularly closed, and a winch is arranged between the two ends. The technology is prior art, and will not be described here. Please refer to Figure 10 In the subsequent process of pulling through the steel strand 50, if jamming occurs, the steel strand 50 will inevitably push the upper slide 14 outward, at this time the cable 37 will be further tightened, and then the second hinge end will be pulled, so that the rotating disc 32 rotates counterclockwise, and then the two pull rods 33 pull the two sliding seats 21 to move relatively, at this time the clamping force is further increased, forming self-adjustment, which can respond instantaneously and solve the jamming caused by the increase of local stress, avoiding slipping.

[0096] Regarding the relative movement of the sliding seat 21, the fifth telescopic structure 34 is involved, and an extrusion spring 342 is arranged between the telescopic end of the fifth telescopic structure 34 and the sliding seat 21, that is, when the telescopic end of the fifth telescopic structure 34 is fixed, the sliding seat 21 can further move relatively, the extrusion spring 342 is compressed, and the clamping force is further provided. When the local jamming is removed, the two sliding seats 21 will return to the original position, that is, the sliding seat 21 abuts against the telescopic end of the fifth telescopic structure 34 again, that is, the clamping force is automatically changed and adjusted according to the jamming of the rubber pipe 40 or the steel strand 50, which can respond instantaneously. At the same time, the clamping force can be restored after the jamming is accepted, so as to avoid damaging the steel strand 50 due to excessive clamping force.

[0097] Regarding the fifth telescopic structure 34, at least two can be arranged to ensure that the sliding seat 21 is uniformly stressed in the width direction.

[0098] In some embodiments, as Figures 1 to 2 , and Figures 5 to 6 The pipe pulling and threading device for laying the steel strand 50 for bridge erection further comprises a guide roller set 70, which is arranged on the moving platform and distributed at both ends of the clamping channel.

[0099] The guide roller set 70 can play a precise guiding role before the rubber tube 40 or the steel strand 50 enters the clamping channel and after the rubber tube 40 or the steel strand 50 passes out of the clamping channel. When the rubber tube 40 or the steel strand 50 enters, the guide roller set 70 can correct the initial direction of the rubber tube 40 or the steel strand 50, ensure that the rubber tube 40 or the steel strand 50 enters along the axial direction of the clamping channel, and avoid the entry jam caused by the bending or deviation of the rubber tube 40 or the steel strand 50. When the rubber tube 40 or the steel strand 50 passes out, the guide roller set 70 can continue to guide the rubber tube 40 or the steel strand 50 to move along the axial direction of the reserved hole, avoid the deviation of the rubber tube 40 or the steel strand 50 after passing out of the clamping channel due to the loss of clamping, and cause the rubber tube 40 or the steel strand 50 to fail to smoothly enter the reserved hole.

[0100] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pipe pulling and threading device for steel strand laying based on bridge erection, characterized in that, The utility model relates to a kind of mobile vehicle body, bottom has travelling wheel;The mobile vehicle body has mobile platform that can move in space;The mobile vehicle body has length direction and width direction arranged horizontally;The mobile vehicle body includes upper slide, and the upper slide is the mobile platform; Two pulling mechanisms are provided, and the two pulling mechanisms are arranged in parallel in the horizontal direction;Each pulling mechanism has a flexible chain transmission traction part;The two flexible chain transmission traction parts form a clamping channel for the passage of rubber pipes or steel strands;Each pulling mechanism includes a sliding seat connected to a slide rod arranged in the length direction in the upper slide; A power assembly is connected to the pulling mechanism for relative movement or opposite movement of the two pulling mechanisms to adjust the clamping channel;The power assembly includes a rotating disc, a pull rod and a fifth telescopic structure;The rotating disc is rotatably arranged on the upper slide below the two sliding seats;The rotating disc has a vertical axis;Two hinge ends are provided on the outer edge of the rotating disc;Two pull rods are provided, and each pull rod corresponds to one of the two sliding seats or the two hinge ends;One end of each pull rod is rotatably connected to the corresponding sliding seat, and the other end is rotatably connected to the corresponding hinge end;The fifth telescopic structure is fixedly arranged on the upper slide and connected to one of the sliding seats; After the mobile vehicle body is fixed, the position of the mobile platform is adjusted to correspond to multiple reserved holes in the clamping channel; The two hinge ends are set as a first hinge end and a second hinge end;The fifth telescopic structure has an abutment plate on the telescopic end, and a limiting cavity is provided on the corresponding sliding seat for the telescopic end of the fifth telescopic structure to extend into;An extrusion spring is provided between the limiting cavity and the abutment plate, which can elastically move the abutment plate to continuously have a tendency to abut against the sliding seat;The power assembly can further include a push slide column and a cable;The push slide column is slidably arranged on the upper slide in the width direction;One end of the push slide column has a long strip sliding opening arranged in the length direction, which can slidably connect the first hinge end;The other end of the push slide column extends out of the upper slide, and a sleeve is threadedly connected to the extending end of the push slide column;One end of the cable is connected to the second hinge end, and the other end extends out through a sliding hole in the upper slide;The other end of the cable has a limiting plate, and a compression spring is provided between the limiting plate and the upper slide;The limiting plate has a hook portion, which can be connected to a concrete precast bridge through an external cable. The mobile vehicle body has a length direction and a width direction arranged horizontally; 2. The pipe pulling and threading device for bridge construction based steel strand laying according to claim 1, wherein, The mobile vehicle body includes: A base is provided on the bottom of the base;A vertical fixing frame is fixedly arranged on the base; ​ The lifting platform is connected with a lifting structure arranged on the vertical fixed frame in a sliding mode to be lifted and moved under the driving of the lifting structure. A lower sliding frame is connected with the sliding platform along the length direction, and the lower sliding frame is connected with a second telescopic structure arranged on the lifting platform. An upper sliding frame is connected with the lower sliding frame along the width direction, and the upper sliding frame is connected with a third telescopic structure arranged on the lower sliding frame; the upper sliding frame is the moving platform.

3. The bridge-erection-based strand-laying pipe-pulling threading device according to claim 2, characterized by The lifting structure comprises: A vertical sliding frame is connected with the vertical fixed frame in a vertical sliding mode; the top of the vertical sliding frame is provided with two lifting sprockets which are arranged in a spaced mode along the width direction; the vertical sliding frame is connected with the lifting platform in a sliding mode; A first telescopic structure is arranged vertically, and the bottom end thereof is connected with the bottom end of the vertical fixed frame, and the top end thereof is connected with the vertical sliding frame; Two lifting chains are arranged, and each of the two lifting chains is correspondingly connected with one of the two lifting sprockets; one end of each of the lifting chains is connected with the lifting platform, and the other end of each of the lifting chains is connected with a fixed cross bar arranged on the vertical fixed frame after passing through the corresponding lifting sprocket.

4. The pipe pulling and threading device for bridge construction based steel strand laying according to claim 3, wherein, The first telescopic structure, the second telescopic structure and the third telescopic structure are all hydraulic cylinders. The base is provided with a plurality of oil pumps, and each of the oil pumps is arranged in a matched mode with the first telescopic structure, the second telescopic structure and the third telescopic structure.

5. The pipe pulling and threading device for bridge construction based steel strand laying according to claim 2, wherein, The through direction of the clamping channel is arranged in the same direction as the width direction.

6. The pipe pulling and threading device for bridge construction based steel strand laying according to claim 2, wherein, Each of the pulling mechanisms comprises: Two rotating shafts are arranged, the two rotating shafts are arranged in a spaced mode along the width direction, and each of the rotating shafts is arranged vertically; each of the rotating shafts is coaxially connected with a transmission sprocket; one of the rotating shafts is connected with a driver; A transmission chain is arranged in a ring mode on the two transmission sprockets; A plurality of clamping blocks are arranged, the clamping blocks are arranged in a spaced mode along the transmission chain on the transmission chain, each of the clamping blocks has an arc-shaped cavity, and the inner wall of the arc-shaped cavity is provided with a plurality of arc-shaped grooves in a spaced mode; each of the clamping blocks is covered with a wear-resistant rubber layer; and the clamping blocks are combined to form the elastic chain transmission traction part.

7. Bridge-erection based strand laying pipe pulling and threading device according to any one of claims 1 to 6, characterized in that The pipe pulling and bundle pulling device for steel strand laying based on bridge erection further comprises a guide roller group, and the guide roller group is arranged on the moving platform and distributed at both ends of the clamping channel.

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