CN110039651B - An Automatic Tensioning System of Prestressed Pipe Pile Formwork Based on Hydraulic Cylinder - Google Patents

Abstract

The invention discloses an automatic tensioning system for a prestressed pipe pile formwork based on a hydraulic oil cylinder, comprising a pipe pile formwork assembly, a tensioning device, a three-dimensional moving platform, a pipe diameter detection device and a displacement sensor device. The tensioning device includes Butt the locking device, and tighten the locking device, the jack hydraulic cylinder and the nut locking device. The three-dimensional moving platform adjusts the centering of the tensioning device and the pipe pile die assembly by moving in the three directions of X, Y and Z. Through the docking locking device, it is connected with the tensioning screw of the pipe pile die head, and the hydraulic cylinder body is tightened through the parallel tightening nut device. , The pipe diameter of the pipe pile mold is detected by the pipe diameter detection device, and the lifting value of the three-dimensional mobile platform is detected by the displacement sensor device. The invention can adapt to the tensioning of pipe piles of various specifications, can fully realize automation, liberate manual labor, and greatly improve production efficiency.

Description

An Automatic Tensioning System of Prestressed Pipe Pile Formwork Based on Hydraulic Cylinder

technical field

The invention belongs to the field of construction pipe piles, relates to an automatic tensioning system for a pretensioning method prestressed concrete pipe pile form, and in particular relates to an automatic tensioning system for a prestressed pipe pile form based on a hydraulic oil cylinder.

Background technique

Prestressed concrete pipe piles have been widely used in engineering as the foundation of civil engineering such as house building structure and bridge structure due to their advantages of high single pile bearing capacity and convenient construction. Each type of pipe pile has a tension plate with a matching size for the outer diameter. The tension plate is generally made of cast steel, forged steel and other materials. Hole, the circumference diameter of the center of the hole is the circumference diameter of the center of the main bar of the pipe pile, which can be used for multiple purposes, and can meet the tension requirements of pipe piles with different wall thicknesses. When stretching, the outer sleeve of the stretching machine is placed on the support plate outside the tube mold, and the nut connected to the piston at the center of the stretching machine is sleeved on the stretching screw. When the stretching machine is fed with oil, the stretching screw is pulled out. When the tension reaches the specified tension value, tighten the locking nut on the tension screw to lock the tension force on the tube mold, then return the oil and stretch The nut sleeve on the machine is separated from the screw, and the tensioning is completed.

1. At present, it is necessary to manually move the jack and adjust it up and down for the tensioning of the pipe pile mold.

2. If the tensile force is too large, the pipe pile is prone to over-arching or cracking in the pre-tensioning area, and brittle fracture will occur in severe cases.

3. If the tensile force is too small, the pipe pile will crack prematurely, the crack resistance will be reduced, the disturbance will exceed the allowable value, and the design goal of prestressed concrete will not be achieved.

4. When the steel bars are broken during the tensioning process of the pipe piles, it is almost impossible to find that the steel bars break seriously affect the quality of the pipe piles.

The existing prestressed pipe pile mold automatic tensioning system includes a tensioning device, a nut locking device, a lifting platform, a horizontal displacement device for the lifting platform, a connection locking device for the connection between the tensioning device and the head plate tensioning screw, and a connection lock. The locking device includes a claw, a base, a rotating shaft, and a hydraulic cylinder that drives the claw to rotate. When the driving claw is closed, it is matched with the conical connector to form a stable connection. The above-mentioned connection locking device has a complex structure and a relatively large volume. It is too large and cannot adapt to the die tension of pipe piles of different sizes. The nut locking device includes a sliding table base, a nut locking sliding table, a motor mounting seat, an AC motor, a pulley, and a transmission belt. After the alignment of the tensioning device and the pipe pile mold is completed, the transmission belt is just sleeved on the pipe pile mold assembly. The locking nut of the nut can be lifted by the lifting device to lock the sliding table, and the power transmission connection between the pulley and the locking nut can be completed. The lift table includes a column welding piece, a top plate, a lifting plate and a vertical motion drive device. The lift table has a high center of gravity and is pulled up by a wire rope, which is easy to shake and has poor stability.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an automatic tensioning system for prestressed pipe pile moulds with a high degree of automation, to solve the problem of low efficiency of manual tensioning at present, and another purpose of the present invention is to provide a prestressed pipe pile mould that can adapt to multiple specifications The automatic tensioning system solves the problem that the tensioning machine in the existing technology can only target the pipe pile molds of specific specifications, so that it can automatically adapt to the tensioning of pipe piles of various specifications without manual adjustment.

In order to solve the above-mentioned technical problems, the technical scheme adopted in the present invention is:

An automatic tensioning system for prestressed pipe pile molds based on hydraulic cylinders, comprising a tensioning device, a pipe pile mold assembly and a three-dimensional mobile platform, wherein the pipe pile mold assembly includes a pipe pile mold and a steel bar connected to the pipe pile mold The head plate tensioning screw is characterized in that: the tensioning device is installed on a three-dimensional moving platform, and the three-dimensional moving platform is aligned with the pipe pile mold, and the tensioning device includes a tensioning bracket and is installed on the tensioning bracket. The butt locking device, and the locking device and the jack hydraulic cylinder, the tension bracket includes a front plate, a rear plate and a plurality of support rods that are fixedly connected to the two, the jack hydraulic cylinder includes a cylinder body, a piston and a hydraulic jack. A piston rod and a hollow jack rod, the jack rod freely passes through a hollow through hole in the piston rod through the front and rear ends of the cylinder body, and the cylinder body of the hydraulic jack cylinder is fixedly installed on the rear plate of the tension bracket, The front plate and the middle part of the rear plate of the tensioning bracket are provided with through holes for the jack rod to extend and connect with the head plate tensioning screw;

The docking locking device is arranged at the front end of the jack rod and is used for docking with the head plate tensioning screw. The docking locking device includes a butt nut that is threadedly connected to the head plate tension screw and drives the butt nut to rotate to complete the docking drive. device; the parallel-tight locking device is arranged at the rear end of the jack rod, and is used to tighten the jack rod and the piston rod of the hydraulic cylinder of the jack. The pull-up nut on the pull rod and the pull-up pull-up nut rotate to slide along the jack pull rod.

As an improvement, the pipe pile mold assembly further includes a head plate and a locking nut, the head plate is fixedly installed on the pipe pile mold, and a center hole for the head plate tensioning screw to freely pass through is provided in the middle of the head plate. The plate tensioning screw and the locking nut are matched by threads, and the relative position of the head plate tensioning screw and the head plate can be locked by twisting the locking nut, and the locking nut is screwed and locked by the nut locking device.

As an improvement, the tensioning device further includes a nut locking device for locking the lock nut, the nut locking device is installed at the front end of the tensioning bracket, and includes a locking head, a locking base and a locking motor , the locking base is installed on the front end of the tensioning bracket through a flexible device, the locking head is installed on the locking base through a bearing, and the middle of the locking head is provided with a tightening sleeve matched with the locking nut. The locking motor is used to drive the locking head to rotate, so that the locking nut can be screwed to complete the locking action.

As an improvement, the flexible device includes a cylindrical guide rail, a linear cylindrical slide block and a passive tension spring, the cylindrical guide rail is fixedly installed on the support rod of the tensioning bracket in parallel, and the linear cylindrical slide block is installed on the cylindrical guide rail, The locking base is installed on the linear cylindrical slider, and the passive tension spring is installed between the locking base and the inner side surface of the front plate of the tensioning bracket.

As an improvement, the docking drive device includes a docking motor, a docking bracket, a docking guide rail and a pull rod auxiliary hydraulic cylinder, the docking guide rail is fixedly installed at the rear end of the tensioning bracket, and the docking bracket is installed on the docking guide rail through a slider, The docking bracket is connected with the tensioning bracket through the tie rod auxiliary hydraulic cylinder, and the docking motor is installed on the docking bracket and connected with the jack tie rod shaft, and the tie rod auxiliary hydraulic cylinder pulls the butt bracket to make the jack tie rod move toward the pipe pile mold. , and then drive the jack rod to rotate through the docking motor to complete the docking.

As an improvement, the parallel-tightening locking device further includes a parallel-tightening support plate and a parallel-tightening motor, the parallel-tightening nut is mounted on the parallel-tightening support plate through a bearing, and the parallel-tightening motor is driven by gear transmission and the parallel-tightening nut. connected.

As an improvement, the parallel-tightening locking device further includes a parallel-tightening nut limit guide rod, the parallel-tightening nut limiter guide rod is fixedly installed on the tension bracket, and is installed in parallel with the jack rod, and the parallel-tightening nut passes through The slider guide structure is installed on the limit guide rod of the parallel tightening nut, and the parallel tightening nut can only move along the axial direction of the jack pull rod through the tightening nut limit guide rod, so that the jack pull rod and the piston rod of the hydraulic cylinder of the jack are parallel to each other. tight.

As an improvement, the three-dimensional mobile platform includes a mobile base, a ground slide rail and a lifting trolley. The ground slide rail is fixed on the ground, the mobile base is installed on the ground slide rail, and the mobile base is provided with a direction of the ground slide rail. The vertical moving base slide rail, the lifting trolley is installed on the moving base sliding rail of the moving base, and the tensioning device is installed on the lifting end of the top of the lifting trolley.

As an improvement, the lifting trolley includes a lifting trolley base, a cross bracket, a lifting trolley roof plate and a lifting hydraulic cylinder. The bottom of the lifting trolley base is mounted on the sliding rail of the mobile base through steel wheels. The trolley base is hingedly connected to the lift trolley roof, the middle part of the cross bracket is hingedly mounted through the central support shaft, one end of the lift hydraulic cylinder is hingedly mounted on the lift trolley base, and the other end is hingedly mounted on the center support shaft.

As an improvement, a linear displacement sensor for detecting the lifting height of the lifting trolley roof plate is provided on the lifting trolley base, and a buffer spring for installing a tensioning device is provided on the lifting trolley roof plate.

The beneficial effect of the present invention is that the three-dimensional moving platform is used to adjust the movement of the tensioning device in the three directions of X, Y, and Z, so that the axis of the tensioning screw of the head plate of the pipe pile die and the axis of the butt nut are concentric. . The invention realizes the tensioning of the pipe pile mold by butting the locking device, the tightening locking device and the tensioning device; Detect the pipe diameter of the pipe pile mold, detect the lifting value of the lifting trolley through the linear displacement sensor, and monitor the tension pressure in the system timely and dynamically through the sensor component. Directives, coordinating agencies, and improving operational efficiency. The equipment detection system detects the hydraulic system of the jack in real time. Through the change of the hydraulic pressure, the tension and broken bars can be accurately detected, and the product quality can be improved. The invention can automatically realize alignment and locking with pipe pile moulds of different specifications and tension the pipe pile, with high automation, high product quality and high production efficiency.

The invention can automatically detect and adapt to different pipe diameter pipe pile molds; realize continuous and uninterrupted production; ingenious structural design, sensor detection device and PLC data processing ensure alignment and locking accuracy; automatic realization of pipe pile alignment and locking And carry out tensioning; equipment detection system real-time detection of jack hydraulic system can accurately find the situation of tensioning and broken bars; through comprehensive system design to control errors and ensure accuracy.

Description of drawings

Fig. 1 is a perspective view of the overall structure of the automatic tensioning system of the prestressed pipe pile formwork of the present invention.

Fig. 2 is a side view of the overall structure of the prestressed pipe pile formwork automatic tensioning system of the present invention.

FIG. 3 is a schematic diagram of the structure of the butt nut of the butt locking device.

Figure 4 is a schematic diagram of the structure of the tensioning device.

Figure 5 is a side view of the figure.

FIG. 6 is a partial schematic diagram A in FIG. 5 .

FIG. 7 is a schematic view of the structure of the parallel-tight locking device.

FIG. 8 is a schematic diagram of the installation relationship of the nut locking device on the tensioning device.

FIG. 9 is a schematic structural diagram of a nut locking device.

FIG. 10 is a schematic structural diagram of a pipe diameter detection device.

Figure 11 is a schematic diagram of the structure of the jack hydraulic cylinder.

FIG. 12 is a schematic structural diagram of a three-dimensional mobile platform.

FIG. 13 is a schematic structural diagram of a lifting trolley of a three-dimensional mobile platform.

1-Pipe pile mold assembly, 101-Pipe pile mold, 102-Head plate, 103-Lock nut, 104-Head plate tension screw, 105-Transport support, 2-Tension device, 201-Butt locking device , 20101-butt nut, 20102-limit switch, 20103-butt nut stop rod, 20104-butt motor, 20105-butt bracket, 20106-butt guide rail, 20107-tie rod auxiliary hydraulic cylinder, 20108-parallel nut limit guide Rod, 20109-Tail Guide Rod Bracket, 20110-Polished Rod Rail, 20111-Polished Rod Rail Mount, 20112-Slip Ring, 20113-Slip Ring Bracket, 20114-Displacement Sensor, 20115-Coupling, 20116-Travel Switch, 20117- Travel switch bracket, 202- and locking device, 20201-parallel motor, 20202-parallel support plate, 20203-transmission gear, 20204-turntable bearing, 20205-parallel nut, 20206-driven gear, 203-jack Hydraulic Cylinder, 20301-Jack Pull Rod, 20302-Piston Rod, 20303-Cylinder Block, 204-Nut Locking Device, 20401-Turntable Bearing, 20402-Locking Head, 20403-Conical Tooth Line, 20404-Transmission Gear, 20405 -Passive tension spring, 20406-Lock base, 20407-Lock switch bracket, 20408-Lock switch, 20409-Lock switch stop, 20410-Cylinder rail support, 20411-Cylinder rail, 20412-Linear cylinder Slider, 20413- Locking Motor, 20414- Driven Gear, 205- Tensioning Bracket, 2051- Front Plate, 2052- Rear Plate, 2053- Support Rod, 3- 3D Mobile Platform, 301- Console, 302- Hydraulic Station, 303-Lifting trolley, 304-Mobile base slide rail, 305-Mobile base, 306-Ground slide rail, 30301-Drum, 30302-Drum support, 30303-Lifting trolley base, 30304-Cross bracket, 30305- Lifting hydraulic cylinder, 30306-center support shaft, 30307-lifting trolley roof plate, 30308-buffer spring, 30309-bracket, 4-pipe diameter detection device, 401-top pulley, 402-displacement sensor contact rod, 403-pipe diameter detection sleeve Cylinder, 404-displacement sensor, 405-sensor fixing card, 406-slide bar, 5-linear displacement sensor.

Detailed ways

The present invention will be illustrated below with reference to the accompanying drawings

As shown in Figures 1 to 13, an automatic tensioning system for prestressed pipe pile moulds based on hydraulic cylinders includes a pipe pile mould assembly 1, a tensioning device 2, a three-dimensional moving platform 3, a pipe diameter detection device 4 and a straight line Displacement sensor 5; as shown in FIG. 3, the pipe pile mold assembly includes a pipe pile mold 101, a head plate 102, a locking nut 103, and a head plate tension screw 104 connected to the reinforcing bars in the pipe pile mold. 102 is fixedly installed on the pipe pile mold 101, and a central hole is provided in the middle of the head plate 102 for the head plate tensioning screw 104 to freely pass through. The relative position of the head plate tensioning screw 104 and the head plate 102 can be locked by the locking nut 103. The end of the head plate tensioning screw 104 is provided with a threaded head for docking. During tensioning, the pipe pile mold 101 is temporarily supported by the transportation 105. fixed.

As shown in Fig. 1, Fig. 2, Fig. 11 and Fig. 12, the tensioning device 2 is installed on a three-dimensional moving platform 3, and the three-dimensional moving platform 3 adjusts the tension by moving in the three directions of X, Y and Z. The centering of the tensioning device 2 and the pipe pile mold assembly 1, the tensioning device 2 includes a tensioning bracket 205 and a butt locking device 201 installed on the tensioning bracket 205, and the tightening and locking device 202, the jack hydraulic cylinder 203 and a nut locking device 204, the tensioning bracket 205 includes a front plate 2051, a rear plate 2052 and a plurality of support rods 2053 that are fixedly connected to the two, the hydraulic jack cylinder 203 includes a cylinder 20303, a piston and a piston rod 20302 and the hollow jack rod 20301, the jack rod 20301 freely passes through the hollow through hole in the piston rod 20302 through the front and rear ends of the cylinder 20303, as shown in FIG. The piston rod 20302 protrudes unidirectionally from the left side of the cylinder block 20303. The piston rod 20302 can be in contact with the locking device 202 to complete the tensioning action. The jack rod 20301 passes through the hollow inside of the piston rod 20302 and passes from the right side of the cylinder block 20303. Therefore, in general, the jack tie rod 20301 needs to be sealed with the cylinder 20303 through the shaft sleeve, so that the jack tie rod 20301 penetrates from both ends of the cylinder block 20303, and can move back and forth freely, and can also rotate. The protruding piston rod 20302, that is, the piston rod 20302 protrudes from both ends of the cylinder block 20303, at this time, the interior of the piston rod 20302 is hollow, and it only needs to meet the sliding seal between the piston rod 20302 and the cylinder block 20303. The diameter of the jack rod 20301 Slightly smaller than the hollow hole diameter of the piston rod 20302, so that the jack tie rod 20301 can freely penetrate the jack hydraulic cylinder 203. It should be pointed out that the above is only a preferred embodiment, and the jack hydraulic cylinder 203 can also pass through other products in the prior art. It is only required that the jack rod 20301 can freely pass through the piston rod 20302. In the embodiment of the present invention, the rear end of the rear half of the jack rod 20301 is provided with a thread, which is convenient for connection with the parallel tightening nut 20205.

As shown in FIG. 2 and FIG. 4 , the cylinder body 20303 of the hydraulic jack cylinder 203 is fixedly installed on the rear plate 2052 of the tensioning bracket 205 , and the middle parts of the front plate 2051 and the rear plate 2052 of the tensioning bracket 205 are provided with jacks for The tie rod 20301 protrudes from the through hole that is docked with the head plate tensioning screw 104; the docking locking device 201 is provided at the front end of the jack tie rod 20301 for docking with the head plate tensioning screw 104, and the docking locking device 201 includes a connection with the head plate The butt nut 20101 connected to the tensioning screw 104 and the butt nut 20101 that drives the abutment nut 20101 to rotate to complete the butt joint drive device; the parallel locking device 202 is provided at the rear end of the jack rod 20301 for connecting the jack rod 20301 to the hydraulic jack The piston rod 20302 of the cylinder 203 is tightened together. The parallel tightening locking device 202 includes a parallel tightening nut 20205 which is sleeved on the jack rod 20301 at the rear end of the jack hydraulic cylinder 203 through threaded fitting, and the driving and tightening nut 20205 rotates along the jack rod. 20301 Sliding and tightening drive. During tensioning, the tensioning device 2 is adjusted by the three-dimensional moving platform 3, so that the front plate 2051 of the tensioning bracket 205 is pressed against the pipe pile mold, and the jack rod 20301 is driven by the docking drive device to rotate and move forward with the thread of the head plate tensioning screw 104 Match and butt, then drive and tighten the nut 20205 along the jack rod 20301 to the piston rod 20302 of the jack hydraulic cylinder 203 through the tightening drive device and tighten, then start the jack hydraulic cylinder 203 to push out the piston rod 20302, and the piston rod 20302 passes and tightens. The nut 20205 transmits the tension force to the jack rod 20301, thereby completing the tensioning action of the head plate tensioning screw 104, and then completing the locking of the locking nut through the nut locking device 204, thereby completing the automatic tensioning process of a pipe pile mold .

As shown in FIG. 2 and FIG. 3 , the butt locking device 201 includes a butt nut 20101, a butt nut stop rod 20103 and a limit switch 20102. The butt nut 20101 communicates with the jack hydraulic cylinder 203 through the butt nut stop rod 20103 The jack rod 20301 at the front end is fixedly connected, and a limit switch 20102 is installed in the middle of the butt nut 20101. Through the limit switch 20102, it can be judged whether the butt nut 20101 and the head plate tensioning screw 104 are in place.

As shown in FIG. 5 and FIG. 7 , the parallel-tightening locking device 202 includes a parallel-tightening nut 20205, a transmission gear 20203, a turntable bearing 20204, a parallel-tightening support plate 20202, and a parallel-tightening motor 20201, and the parallel-tightening motor 20201 is fixedly installed On the parallel-tightening support plate 20202 and connected with the transmission gear 20203, the parallel-tightening nut 20205 is mounted on the parallel-tightening support plate 20202 through the turntable bearing 20204, and the tightening nut 20205 is provided with a driven gear 20206 meshing with the transmission gear 20203 , the parallel tightening nut 20205 is sleeved on the jack rod 20301 to form a threaded connection, and the parallel tightening support plate 20202 passes through the parallel tightening nut limit guide rod 20108 and the parallel tightening nut limit guide rod 20108 and form a sliding connection, so that through When the unscrewing motor 20201 drives the unscrewing nut 20205 to rotate, the unscrewing support plate 20202 can move back and forth along the jack rod 20301 along with the unscrewing nut 20205.

As shown in Figures 2, 3, 4, 5, and 6, the docking locking device 201 further includes a slip ring 20112, a slip ring bracket 20113, a polished rod guide rail 20110, a polished rod guide rail support 20111, a travel switch 20116, and a travel switch bracket 20117 , docking motor 20104, coupling 20115, docking bracket 20105, and tightening nut limit guide rod 20108, tail guide rod bracket 20109, tie rod auxiliary hydraulic cylinder 20107 and displacement sensor 20114, the slip ring 20112 is fixed by the slip ring bracket 20113 Installed on the jack rod 20301 and the lower end passes through the polished rod guide rail 20110, the slip ring 20112 is used for the cable and control wire of the nut locking device 204 to pass through, preventing the cable from winding, the travel switch 20116 is fixed by the travel switch bracket 20117 Installed on the rear plate 2052 of the tensioning bracket 205, it is used to detect the limit stroke between the butt nut 20101 and the rear plate 2052, so as to prevent the tie rod auxiliary hydraulic cylinder 20107 from over-elongating, and cause the butt nut 20101 to collide with the rear plate 2052, so The jack tie rod 20301 penetrates through the cylinder body 20303 of the jack hydraulic cylinder 203 and is connected to the butt motor 20104 on the butt bracket 20105, and the jack tie rod 20301 at the end of the jack hydraulic cylinder 203 is connected to the butt motor 20104 through the coupling 20115, and the butt motor 20104 is fixed Installed on the docking bracket 20105, the docking bracket 20105 is connected with the tensioning bracket 205 through the pull rod auxiliary hydraulic cylinder 20107, and the pull rod auxiliary hydraulic cylinder 20107 can pull the docking motor 20104, the docking bracket 20105 and the jack pull rod 20301 which are relatively connected together. The pipe pile molds are close to butt joint or away from unloading, the cylinder block 20303 of the hydraulic jack 203 is fixedly connected to the rear plate 2052 of the tensioning bracket 205, and the clamping nut limit guide rod 20108 is fixedly installed on the tail guide rod bracket 20109. On the rear plate 2052 of the tensioning bracket 205, the displacement sensor 20114 is fixedly installed on the cylinder body 20303 of the hydraulic jack cylinder 203, and is used to detect the tension stroke of the hydraulic jack cylinder 203, that is, the amount of the piston rod stretching out, as A more preferred embodiment, in order to monitor the tension force in real time, a pressure sensor can also be set between the parallel tightening nut 20205 and the piston rod 20302 of the hydraulic jack cylinder 203. The tension force on the nut 20205 is the tension force exerted on the jack rod 20301, and the pressure sensor can be installed on the end of the nut 20205 and the end of the piston rod 20302 (not shown in the figure).

As shown in FIG. 8 and FIG. 9 , the nut locking device 204 includes a locking head 20402, a turntable bearing 20401, a transmission gear 20404, a locking base 20406, a locking motor 20413, a cylindrical guide rail 20411, and a cylindrical guide rail support 20410 , linear cylindrical slider 20412, locking switch block 20409, locking switch 20408, locking switch bracket 20407 and passive tension spring 20405, the locking motor 20413 is fixedly installed on the locking base 20406 and is connected with the transmission gear 20404 is connected, the locking head 20402 is installed on the locking base 20406 through the turntable bearing 20401, the middle of the locking head 20402 is provided with a tightening sleeve that cooperates with the locking nut 103 and penetrates, and the locking head 20402 is provided with There is a driven gear 20414 meshing with the transmission gear 20404. The locking base 20406 is connected to the linear cylindrical slider 20412 through the locking switch block 20409. The linear cylindrical slider 20412 slides on the cylindrical guide rail 20411. The cylindrical guide rail 20411 is fixed on the support rod 2053 and the front plate 2051 of the tension bracket 205 through the cylindrical guide rail support 20410, and the locking switch 20408 is fixedly installed on the cylindrical guide rail support 20410 through the locking switch support 20407 for detection. Lock the limit position between the base 20406 and the lock nut 103, and judge whether the connection is good. When the connection is tensioned, the jack rod 20301 installed with the connection nut 20101 passes through the middle of the lock head 20402 and the tensioning screw 104 of the head plate. When docking, when the distance between the locking head 20402 and the locking nut 103 meets the limit position requirement, the locking switch 20408 detects the signal, that is, starts the locking motor 20413, and drives the locking head 20402 to rotate to lock the locking nut 103 When the distance between the locking head 20402 and the locking nut 103 becomes larger or the locking motor 20413 reaches the threshold value, that is, the locking is good, the locking motor 20413 can be stopped, and the passive tension spring 20405 and the lock The tightening base 20406 is connected with the tensioning bracket 205, so that the locking base 20406 and the pipe pile mold have a yield to prevent a hard collision.

As shown in Figures 1 and 12, the three-dimensional moving platform 3 moves in the three directions of X, Y, and Z to make the end face of the tensioning bracket 205, that is, the end face of the front plate 2051 and the head plate 104, coincide, and the axis of the butt nut 20101 is aligned with the end face of the head plate 104. The axis of the head plate tensioning screw 104 is aligned, the pull rod auxiliary hydraulic cylinder 20107 shrinks, and the docking motor 20104 at the rear rotates, driving the jack pull rod 20301 to spirally move until the head plate tensioning screw 104 triggers the limit switch on the butt nut 20101 In 20102, the docking motor 20104 stops rotating, the pull rod auxiliary hydraulic cylinder 20107 stops shrinking, and the docking and locking is completed at this time; the parallel-tightening locking device 202 is driven by the parallel-tightening motor 20201 to make the parallel-tightening nut 20205 rotate on the jack rod 20301. , until it is in close contact with the end of the hydraulic jack cylinder 203, that is, the displacement sensor 20114 detects and tightens the nut 20205 and the piston rod 20302 of the hydraulic jack cylinder 203, and at this time, the tightening is completed; the hydraulic station 302 is directed to the jack Hydraulic cylinder 203 enters oil, pushes the piston to move backward, and the piston rod 20302 that the piston passes through moves backward to squeeze and tighten the nut 20205, which drives the entire jack rod 20301 to move backward under the push of the piston rod 20302 , until the slip ring 20112 contacts the stroke opening 20116, the hydraulic station 302 stops supplying oil, the pressure sensor dynamically detects and controls the tensioning pressure in the tensioning system in real time, and at the same time, the nut locking device 204 is driven by the locking motor 20413. The locking nut 103 is screwed and locked, and the tensioning action is completed.

As a preferred embodiment, as shown in FIG. 9 , the inner cavity of the locking head 20402 in the nut locking device 204 forms six conical-like tooth lines 20403, and the locking head 20402 has a conical-like tooth shape. The wire 20403 is gradually contacted with the outer surface of the lock nut 103 until the entire nut locking device 204 is pushed backward, at this time the passive tension spring 20405 is kept in a tensioned state, the travel switch 20408 is triggered, and the locking motor 20413 is activated to rotate, and then Drive the locking head 20402 to rotate until the locking nut 103 is locked. Of course, the present invention can also be realized by using the working screw nut sleeve in the prior art. If the phase of the conical toothed line 20403 touches the corner of the hexagon, the entire nut locking device 204 is pushed back, and the passive tension spring 20405 is in a tensioned state at this time, and the locking switch 20408 When triggered (indicating that the phase of the new locking head is not aligned with the conical tooth line), the locking motor 20413 drives the locking head 20402 to rotate through the transmission gear 20404 until it finds a suitable position. The conical toothed line 20403 of the locking head 20402 gradually contacts the outer surface of the locking nut 103 until the conical toothed line is completely engaged with the outer surface of the locking nut. The locking nut 103 is locked under the driving.

As shown in Figures 12 and 13, the three-dimensional mobile platform 3 includes a mobile base 305, a lift trolley 303, a console 301, a hydraulic station 302, a mobile base slide rail 304, and a ground slide rail 306. The ground slide rail 306 is fixedly installed on the ground The mobile base 305 is installed on the ground slide rail 306, the mobile base slide rail 304 is fixed on the mobile base 305, the lift trolley 303 is installed on the mobile base slide rail 304, and the mobile base 305 moves on the ground slide rail 306. Adjust the distance of the tensioning device 2 on the X axis, adjust the distance of the tensioning device 2 on the Y axis by moving the lifting trolley 303 on the sliding rail 304 of the moving base, and use the lifting hydraulic cylinder 30305 on the lifting trolley 303 to make the lifting and lowering. The small roof plate 30307 moves up and down, so as to adjust the distance of the tensioning device 2 on the Z axis.

As shown in Fig. 2, Fig. 12 and Fig. 13, the lifting trolley 303 includes a steel wheel 30301, a steel wheel support 30302, a lifting trolley base 30303, a cross bracket 30304, a central support shaft 30306, a lifting hydraulic cylinder 30305, a lifting trolley roof plate 30307 and buffer spring 30308, the lift trolley roof plate 30307 is provided with a buffer spring 30308 for installing the tensioning device 2, the buffering spring 30308 acts as a buffer when the tensioning device 2 is tensioned to prevent the tensioning device 2 from shaking up and down , the bottom of the lift trolley base 30303 is installed on the sliding rail 304 of the mobile base through the steel wheel 30301, the cross bracket 30304 is hingedly connected to the lift trolley base 30303 and the lift trolley roof 30307 on one side up and down, and the other side of the cross bracket 30304 is up and down They are respectively connected with the lifting trolley base 30303 and the lifting trolley roof plate 30307 through the guide rail slider structure. The middle part of the cross bracket 30304 is hingedly installed through the central support shaft. on the support shaft. The steel wheel 30301 slides on the sliding rail 304 of the moving base to adjust the distance of the tensioning device 2 in the Y-axis direction. The lifting hydraulic cylinder 30305 telescopically drives the lift car roof 30307 to move up and down to adjust the tensioning device 2 in the Z-axis direction. A linear displacement sensor 5 is installed on the lifting trolley 303 , and the linear displacement sensor 5 is used to detect the lifting height of the tensioning device 2 . As a preferred embodiment, the middle of the lifting trolley base 30303 is provided with an installation groove that runs through up and down, the lifting trolley base 30303 at the installation groove is provided with a downward bracket 30309, and the lower end of the lifting hydraulic cylinder 30305 is hinged on the On the bracket 30309, the telescopic stroke of the lifting hydraulic cylinder 30305 can be greatly increased, thereby increasing the liftable height of the lifting trolley roof plate 30307.

It should be pointed out that for the three-dimensional mobile platform 3, its movement in the X and Y directions can be manually pushed or driven by a motor. For example, a motor is added to the lifting trolley base 30303 to drive the steel wheel 30301 to rotate to complete the movement in the Y-axis direction. The same is true for the X-axis direction. For the movement in the Z-axis direction, in addition to the above-mentioned method of the cross bracket 30304, the hydraulic cylinder can also be directly lifted and lowered. The specific implementation of the three-dimensional mobile platform 3 does not affect the implementation of the technical solution of the present invention. Of course, the combination of other translation devices in the technology can also be used to complete the three-dimensional moving function of the three-dimensional moving platform 3 , so the present invention will not repeat them.

As shown in Figures 2 and 10, a pipe diameter detection device 4 is installed on the side of the transport support 105 of the pipe pile mold. The pipe diameter detection device 4 includes a displacement sensor 404, a pipe diameter detection sleeve 403, a sensor fixing card 405, The displacement sensor touch rod 402, the top pulley 401, the pipe diameter detection sleeve 403 is provided with a retractable sliding rod 406, a spring is provided between the sliding rod 406 and the pipe diameter detection sleeve 403, and the sliding rod is made by the spring. The rod 406 is kept in an extended state, and the top of the sliding rod 406 is provided with a top pulley 401 that can be in contact with the running wheel on the pipe pile mold. The rod 402 is fixedly installed on the sliding rod 406, the pipe diameter detection sleeve 403 is vertically fixedly installed on the side of the transport support 105, when the pipe pile mold is placed on the transport support 105, the pipe pile mold contacts the top pulley 401 and compresses The sliding rod 406 and the displacement sensor 404 can calculate the diameter of the running wheel and the height of the shaft center by detecting the compression amount of the sliding rod 406 and its own position and size data.

The working process of the present invention:

The three-dimensional moving platform 3 moves in the three directions of X, Y and Z to make the end face of the tensioning bracket 205 coincide with the end face of the head plate 102, and the axis of the butt nut 20101 is aligned with the axis of the head plate tensioning screw 104, The moving base 305 slides on the ground rail 306 to adjust the distance of the tensioning device 2 in the X-axis direction. The lift trolley 303 of the three-dimensional mobile platform 3 slides on the sliding rail 304 of the moving base to adjust the tensioning device 2 The distance in the Y-axis direction, the lifting trolley 303 adjusts the distance of the tensioning device 2 in the Z-axis direction through the expansion and contraction of the lifting hydraulic cylinder 30305, and the pull rod auxiliary hydraulic cylinder 20107 on the tensioning device 2 retracts, docking with the motor 20104 rotates to drive the jack rod 20301 to rotate until the head plate tensioning screw 104 triggers the limit switch on the butt nut 20101, and the butt locking is completed at this time; The nut 20205 is rotated on the jack tie rod 20301 until the nut 20205 is tightly fitted with the jack hydraulic cylinder 203. At this time, the tightening is completed; the hydraulic station is controlled by the console to inject oil into the jack hydraulic cylinder 203 to push the piston Move backwards, and the tightening nut 20205 drives the entire jack rod 20301 to move backwards under the push of the piston, until the slip ring touches the limit switch, the hydraulic station stops oil supply, and the sensor component dynamically detects and controls the tension in the tensioning system in a timely manner. At the same time, the nut locking device will screw and lock the locking nut under the drive of the motor, and the tensioning action is completed. After the tensioning action is completed, the docking motor 20104 is reversed, the tie rod auxiliary hydraulic cylinder is extended, the docking nut 20101 is separated from the head plate tensioning screw 104, and the reciprocating cycle is repeated. Connecting, tensioning, locking and other actions.

In addition, in this embodiment of the present invention, a PLC controller can also be set to connect the above-mentioned sensors and motors to the PLC controller, and control the actions of the above-mentioned steps through the PLC controller. The present invention does not depend on a specific control method, and adopts the existing The conventional technical control in the technology can complete the above actions.

Claims (7)

1. An automatic tensioning system for a prestressed pipe pile mold based on a hydraulic oil cylinder, comprising a tensioning device, a pipe pile mold assembly and a three-dimensional mobile platform, and the pipe pile mold assembly includes a pipe pile mold and a pipe pile mold. The head plate tensioning screw connected with steel bars is characterized in that: the tensioning device is installed on a three-dimensional mobile platform, and the three-dimensional mobile platform is aligned with the pipe pile mold, and the tensioning device includes a tensioning bracket and a tensioner installed on the tensioner. The butt locking device on the bracket, and the locking device and the hydraulic jack cylinder, the tensioning bracket includes a front plate, a rear plate and a plurality of support rods that are fixedly connected to the two, and the hydraulic jack cylinder includes a cylinder body, Pistons, piston rods and hollow jack rods, the jack rods freely pass through the hollow through holes in the piston rods through the front and rear ends of the cylinder block, and the cylinder block of the jack hydraulic cylinder is fixedly installed on the back plate of the tensioning bracket On the front plate and the middle part of the rear plate of the tensioning bracket, there are through holes for the jack rod to extend out and connect with the head plate tensioning screw; The docking locking device is arranged at the front end of the jack rod and is used for docking with the head plate tensioning screw. The docking locking device includes a butt nut that is threadedly connected to the head plate tension screw and drives the butt nut to rotate to complete the docking drive. device; the parallel-tight locking device is arranged at the rear end of the jack rod, and is used to tighten the jack rod and the piston rod of the hydraulic cylinder of the jack. The tie nut on the pull rod and the pull nut that rotates to slide along the jack pull rod; The pipe pile mold assembly also includes a head plate and a locking nut, the head plate is fixedly installed on the pipe pile mold, and a center hole is provided in the middle of the head plate for the head plate tensioning screw to freely pass through, and the head plate is tensioned. The screw rod and the locking nut are matched by threads, and the relative position of the head plate tensioning screw rod and the head plate can be locked by twisting the locking nut, and the locking nut is screwed and locked by the nut locking device; The nut locking device is installed at the front end of the tensioning bracket, and includes a locking head, a locking base and a locking motor, the locking base is installed at the front end of the tensioning bracket through a flexible device, and the locking head passes through the front end of the tensioning bracket. The bearing is installed on the locking base, and the middle of the locking head is provided with a tightening sleeve matched with the locking nut. The locking motor is used to drive the locking head to rotate, thereby realizing the tightening of the locking nut and completing the locking action ; The flexible device includes a cylindrical guide rail, a linear cylindrical slide block and a passive tension spring, the cylindrical guide rail is fixedly installed on the support rod of the tensioning bracket in parallel, the linear cylindrical slide block is installed on the cylindrical guide rail, and the lock The tightening base is installed on the linear cylindrical slider, and the passive tensioning spring is installed between the locking base and the inner side surface of the front plate of the tensioning bracket. 2. The automatic tensioning system of the prestressed pipe pile mould according to claim 1, wherein the docking drive device comprises a docking motor, a docking bracket, a docking guide rail and a tie rod auxiliary hydraulic cylinder, and the docking guide rail is fixedly installed on the The rear end of the tensioning bracket is installed on the docking guide rail through the slider, and the docking bracket is connected with the tensioning bracket through the pull rod auxiliary hydraulic cylinder. Connecting, pulling the docking bracket through the tie rod auxiliary hydraulic cylinder can make the jack tie rod move to the pipe pile mold, and then drive the jack tie rod to rotate through the docking motor to complete the docking. 3. The prestressed pipe pile mould automatic tensioning system according to claim 1, characterized in that: the parallel-tightening locking device further comprises a parallel-tightening support plate and a parallel-tightening motor, and the parallel-tightening nut is mounted on the bearing through a bearing. On the parallel-tightening support plate, the parallel-tightening motor is connected with the parallel-tightening nut power transmission through gear transmission. 4 . The automatic tensioning system of the prestressed pipe pile mould according to claim 3 , wherein the parallel-tightening locking device further comprises a parallel-tightening nut limiting guide rod, and the parallel-tightening nut limiting guide rod is fixed in place. 5 . It is installed on the tensioning bracket and is installed in parallel with the jack rod. The parallel tightening nut is installed on the parallel tightening nut limit guide rod through the slider guide structure. With the axial movement of the jack rod, the jack rod and the piston rod of the hydraulic cylinder of the jack are tightened. 5. The automatic tensioning system for prestressed pipe pile moulds according to claim 1, wherein the three-dimensional mobile platform comprises a mobile base, a ground slide rail and a lifting trolley, and the ground slide rail is fixed on the ground, so that the The mobile base is installed on the ground slide rail, the mobile base is provided with a mobile base slide rail perpendicular to the direction of the ground slide rail, the lifting trolley is installed on the mobile base slide rail of the mobile base, and the tensioning device is installed on the lift The lift end of the top of the trolley. 6. The prestressed pipe pile mould automatic tensioning system according to claim 5, wherein the lifting trolley comprises a lifting trolley base, a cross bracket, a lifting trolley roof plate and a lifting hydraulic cylinder, and the bottom of the lifting trolley base passes through The steel wheel is installed on the sliding rail of the mobile base, the upper and lower sides of the cross bracket are hingedly connected to the lifting trolley base and the lifting trolley roof plate, the middle part of the cross bracket is hingedly installed through the central support shaft, and one end of the lifting hydraulic cylinder is hingedly installed on the lifting trolley On the base, the other end is hingedly mounted on the central support shaft. 7 . The automatic tensioning system for prestressed pipe pile moulds according to claim 6 , wherein a linear displacement sensor for detecting the lifting height of the lifting trolley roof is provided on the base of the lifting trolley, and a There are buffer springs for mounting the tensioning device.

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