CN105666684A - Large-diameter nut disassembly assembly of pipe die for pipe pile production - Google Patents

Abstract

The invention belongs to the technical field of construction and relates to a large nut dismantling assembly of a pipe mold for producing pipe piles. It includes a demoulding shaft which is arranged in the chassis and can rotate in a circumferential direction. The end of the demoulding shaft is detachably connected with a screw sleeve assembly which can form a clamping fit with the large nut on the pipe mold. When the demoulding shaft When rotating, the threaded sleeve assembly is driven to rotate synchronously so that the large nut can rotate circumferentially. The demoulding shaft is a hollow shaft and the axis line coincides with the axis line of the threaded sleeve assembly. The invention is applicable to an automatic production line, and can remove the large nut used for tensioning before the pipe mold is disassembled by the clamping screw, so that the large nut is separated from the tensioning end plate, and realizes the possibility of automatic dismantling of the end plate in the next step.

Description

Large nut removal assembly for pipe molds for producing pipe piles

technical field

The invention belongs to the technical field of construction and relates to a large nut dismantling assembly of a pipe mold for producing pipe piles.

Background technique

The production process of existing prefabricated piles or pipe piles is as follows:

1. Measuring and mixing of concrete raw materials. According to the designed mix ratio, sand, stone, cement, water, admixtures and admixtures are accurately measured, and a concrete forced mixer is used to make fresh concrete with a low slump of 3cm to 5cm. The design requires concrete The strength grade is not lower than C60 or C80.

2. Fabrication of centrifugal square pile end plate. The production of the end plate of the pipe pile is basically the same, but the shape of the end plate of the square pile is square, and the counterbores of the prestressed main reinforcement are evenly distributed along the four sides and corners of the end plate. Before the end plate is installed, square pile hoops made of thin steel plates with a thickness of 1.5mm to 2mm need to be welded around.

3. Skeleton production. The prestressed main reinforcement adopts low-relaxation prestressed concrete steel rods, which need to be precisely lengthened, cut, and heading; the spiral reinforcement adopts low-carbon cold-drawn steel wires with a vertebra of 4mm to 6mm; according to the design requirements of centrifugal square pile structure reinforcement, The square steel frame is processed by a special square pile frame automatic welding machine.

4. Install the steel skeleton. Place the prepared steel bar skeleton and welded hoop of the square end plate in the steel mold of the centrifugal square pile, and connect them with the prestressed steel anchor plate, tension plate, tension rod, etc.

5. Concrete cloth. According to the dosage requirements of each centrifugal square pile, fill the lower half of the mold with fresh concrete evenly along the mold, and place as much concrete as possible on the stretched end.

6. Mold closing. Lift the upper half of the steel mold of the centrifugal square pile above the lower half of the steel mold, and fix the upper and lower half of the steel mold with bolts to ensure that the mold does not loosen and the concrete does not run out of slurry during high-speed centrifugal operation.

7. Prestressed tension. A jack-type tensioning machine is used to overall tension the steel frame of the centrifugal square pile after mold closing. After the tension reaches 70% of the strength of the steel bar, the tension rod is fixed on the steel mold with a large nut.

8. Centrifugal process. The above-mentioned tensioned and anchored centrifugal square pile with mold is hoisted above the centrifuge, and accelerated step by step according to the centrifugal speed of initial speed, medium speed, medium high speed and high speed, and the centrifugation time is generally 10 minutes to 18 minutes. Through the centrifugal compacting forming process, the fresh concrete is evenly compacted along the mold periphery of the centrifugal square pile, and at the same time, the pipe pile forms a circular inner cavity. After centrifugation, raise the tension end and dump the waste pulp water generated during centrifugation.

9. Primary steam curing. Hang the molded centrifugal square pile after centrifugation into the atmospheric pressure steam curing pit, stop for 1h~2h, slowly raise the temperature to 90℃~100℃, and cure under normal pressure for 4h~8h, so that the concrete strength can reach more than 40MPa.

10. Demoulding. Lift the molded centrifugal square pile after primary steam curing to the special demoulding platform, remove the tension bolts and mold clamping bolts with a pneumatic wrench, apply prestress to the pile body, then lift the upper half mold, turn it down Half mold, unload the prestressed tensioning large screw. Clean up the upper and lower mold halves, anchor plates, tension rods, and apply release agent. For centrifugal square piles with a concrete design strength grade of C60, the demoulded centrifugal square piles are directly hoisted to the finished product yard for natural curing, and can be shipped after reaching the factory strength.

11. High pressure steaming. For centrifugal square piles whose design concrete strength grade is above C80, the demoulded centrifugal square piles need to be put into the autoclave for high-temperature steam curing. The maximum temperature is 180℃～200℃, the saturated steam pressure is 1.0MPa, and the curing time is 8h～ 12h, make the concrete strength reach more than 80MPa. The pipe piles after high pressure curing can be directly delivered to the factory for piles.

Among them, in the process of demoulding, the existing technology is to remove the upper half mold first, then flip the lower half mold to pour out the pipe mold, and then remove the prestressed tensioning screw, which needs to be removed first The large nut is stretched before the large tension screw can be removed. Before the large tension screw is removed, the pipe pile is always in the middle of the field and cannot be directly placed in the finished pipe pile area. For the modern production process, the tension must first be removed. The large nut on the stretching screw is removed, then the upper mold and the tensioning screw are removed, and then the pipe pile is directly separated from the lower mold and then placed in the finished product area or in the steam curing process. Therefore, the existing production equipment cannot meet the requirements The need to remove large nuts.

Contents of the invention

The object of the present invention is to solve the above problems and provide a large nut removal assembly for pipe molds for producing pipe piles, which can remove the large nuts on the pipe molds before the pipe molds are removed.

In order to achieve the above object, the present invention adopts the following technical solutions: a large nut removal assembly for pipe molds for producing pipe piles, including a mold removal shaft that can rotate circumferentially in the cabinet, and the end of the mold removal shaft The detachable connection has a screw sleeve assembly that can form a clamping fit with the large nut on the pipe mold. When the demoulding shaft rotates, it drives the screw sleeve assembly to rotate synchronously so that the large nut can rotate circumferentially. The demoulding shaft It is a hollow shaft and the axis line coincides with the axis line of the screw sleeve assembly.

In the above-mentioned large nut removal assembly of the pipe mold for producing pipe piles, the screw sleeve assembly can move back and forth along the axis of the mold removal shaft.

In the above-mentioned large nut removal assembly of the pipe mold for producing pipe piles, the screw sleeve assembly includes a screw sleeve, and the screw sleeve and the demoulding shaft form a snap fit through a keyway structure, and the outer wall of the demoulding shaft An elastic component is sheathed, and the two ends of the elastic component abut against the screw sleeve component and the demoulding shaft respectively.

In the above-mentioned large nut removal assembly of the pipe mold for producing pipe piles, the screw sleeve assembly also includes a spline sleeve, and the spline sleeve is sleeved on the outer wall of the demoulding shaft, and the key groove structure includes a The splines or spline grooves on the spline sleeve, and the spline grooves or splines arranged on the outer wall of the demoulding shaft, the splines are inserted into the spline grooves, the splines can move forward and backward along the spline grooves, and the elastic The assembly includes a spring, and the two ends of the spring abut against the spline sleeve and the demoulding shaft respectively.

In the above-mentioned large nut removal assembly of the pipe mold for producing pipe piles, the screw sleeve assembly also includes a coupling arranged between the screw sleeve and the spline sleeve, and the coupling is connected to the screw sleeve and the spline sleeve respectively. The key sleeve is detachably fixedly connected, the demoulding shaft is a hollow shaft, and the inner wall of the screw sleeve is evenly provided with several tooth grooves along the circumferential direction.

In the above-mentioned large nut removal assembly of the pipe mold for producing pipe piles, the cabinet is fixed on the frame, the frame is pressed on the track assembly, and a frame moving assembly is fixed on the frame. The moving assembly can drive the frame to move back and forth along the track assembly.

In the above-mentioned large nut removal assembly for pipe molds for producing pipe piles, the frame moving assembly includes a frame driver fixedly connected to the frame, and the track assembly includes at least two mutually parallel guide rails, at least one A rack assembly is arranged on the guide rail, the output end of the rack driver engages with the rack assembly, and the rack driver can move forward and backward along the rack assembly.

In the above-mentioned large nut removal assembly of the pipe mold used for producing pipe piles, the bottom of the frame is fixed with a number of linear bearings that are movably connected with the guide rail, and the rack assembly includes a rack fixed on the guide rail. The output end of the rack drive is fixed with a gear that meshes with the rack.

In the above-mentioned large nut dismantling assembly of the pipe mold for producing pipe piles, the frame driver is connected with a vertically arranged vertical output mechanism, and the vertical output mechanism can engage with the rack.

In the above-mentioned large nut removal assembly of the pipe mold for producing pipe piles, the vertical output mechanism includes a vertical output shaft arranged on the frame driver, the vertical output shaft is connected to the synchronous shaft through a flange, and the synchronous shaft passes through the bearing in the bearing seat , the bearing seat is fixed on the frame, the end of the synchronous shaft passing through the bearing seat is fixed with a gear, the gear meshes with the rack, and the axis lines of the vertical output shaft, the flange, the synchronous shaft and the bearing seat coincide.

Compared with the prior art, the present invention has the advantages of: the screw sleeve structure of the present invention is connected with the demoulding shaft with a detachable structure, the structure is reliable, and the replacement is convenient, thereby improving the efficiency of dismantling the large nut, and for realizing automatic dismantling of the large nut It provides a necessary structure, which is suitable for automatic production lines; the rack moving component enables the screw insert assembly to automatically approach the large nut that needs to be removed, thereby improving the degree of automation. When the screw insert assembly is in contact with the large nut, the elastic component can generate a buffer , Absorb impact, prevent large nuts and equipment from being damaged, thereby protecting equipment and increasing the service life of equipment.

Description of drawings

Fig. 1 is a structural representation provided by the present invention;

Fig. 2 is a schematic structural view of another direction in Fig. 1;

Fig. 3 is an enlarged view of place A of Fig. 1;

FIG. 4 is an enlarged view of B in FIG. 2 .

In the figure: frame 1, chassis 2, demoulding shaft 3, driving mechanism 4, large gear 41, gear drive assembly 42, driving gear 43, gear driver 44, screw sleeve assembly 5, screw sleeve 51, keyway structure 52, elastic Assembly 53, spline sleeve 54, spline 55, spline groove 56, spring 57, coupling 58, tooth groove 59, rail assembly 6, guide rail 61, rack moving assembly 7, rack driver 71, rack assembly 72 , Linear bearing 73, rack 74, vertical output mechanism 8, vertical output shaft 81, flange 82, synchronous shaft 83, bearing seat 84, bearing 100, spring sleeve 101, ferrule 102.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1-2, a large nut dismantling assembly for pipe molds for producing pipe piles includes a dismantling shaft 3 which is arranged in a casing 2 and can rotate in a circumferential direction, and the end of the dismantling shaft 3 is detachable The connection has a screw sleeve assembly 5 that can form a clamping fit with the large nut on the pipe mold. When the demoulding shaft 3 rotates, the screw sleeve assembly 5 is driven to rotate synchronously so that the large nut can rotate circumferentially. The shaft 3 is a hollow shaft and the axis line coincides with the axis line of the screw sleeve assembly 5. The demoulding shaft 3 is a hollow shaft, so as to match the length of the large nut so that the nut shaft of the large nut can be inserted into the demoulding shaft 3, it is also to further improve the adaptability. The large nut is fixed at the end of the pipe mold and connected with the tension end plate. The outer wall of the large nut has a rack-shaped structure. Those skilled in the art should understand that there are many ways for the screw sleeve assembly 5 to engage with the large nut, such as gear teeth Bar meshing, meshing of gears and gears, snapping of tooth grooves and racks, or snapping of keyways and splines, etc.

The threaded sleeve assembly 5 can move back and forth along the axial direction of the demoulding shaft 3 to realize the soft contact between the threaded sleeve assembly 5 and the big nut, and prevent the big nut or the threaded sleeve assembly 5 from being damaged due to head-to-head contact. Specifically, as shown in FIG. 3 , the screw sleeve assembly 5 includes a screw sleeve 51, and the screw sleeve 51 and the demoulding shaft 3 form a clamping fit through a keyway structure 52, and the keyway structure 52 makes the screw sleeve 51 and the demoulding shaft 3 forms a circumferentially fixed and axially movable connection structure. The outer wall of the demoulding shaft 3 is covered with an elastic component 53 , and the two ends of the elastic component 53 abut against the screw sleeve component 5 and the demoulding shaft 3 respectively. It should be noted that when the screw sleeve 51 is in contact with the big nut, a certain impact force will be generated. If the impact force is too large, it will cause damage to the pipe mold and the screw sleeve assembly 5 of the big nut machine. This application designs the screw sleeve 51 A structure capable of reciprocating back and forth along the axial direction of the demoulding shaft 3 is mainly to absorb the impact force during impact, play a buffering role, and achieve the purpose of protecting the equipment.

The screw sleeve assembly 5 also includes a spline sleeve 54, the spline sleeve 54 is sleeved on the outer wall of the demoulding shaft 3, and the key groove structure 52 includes a spline 55 or a spline groove 56 arranged on the spline sleeve 54 , and the spline groove 56 or spline 55 arranged on the outer wall of the demoulding shaft 3, the spline 55 is inserted into the spline groove 56, the spline 55 can move back and forth along the spline groove 56, and the elastic assembly 53 includes The spring 57, the two ends of the spring 57 are against the spline sleeve 54 and the demoulding shaft 3 respectively. Specifically, a step portion can be set on the demoulding shaft 3 to stop the spring 57, and the spline sleeve 54 naturally plays a blocking role on the spring 57 because it is sleeved on the outer wall of the demoulding shaft 3, and the outside of the spring 57 The spring sleeve 101 can also be sleeved to protect the spring 57 , and the spline sleeve 54 is movably connected with the spring sleeve 101 .

The screw assembly 5 also includes a coupling 58 arranged between the screw sleeve 51 and the spline sleeve 54, and the coupling 58 is detachably fixedly connected with the screw sleeve 51 and the spline sleeve 54 respectively. In this embodiment Among them, the screw sleeve 51 and the shaft coupling 58 are screwed and fixed by bolts, and the shaft coupling 58 and the spline sleeve 54 are clamped and fixed by the ferrule 102 . The inner wall of the screw sleeve 51 is uniformly provided with several tooth grooves 59 along the circumferential direction.

The chassis 2 is fixed on the frame 1, the frame 1 is pressed on the track assembly 6, and a frame moving assembly 7 is fixed on the frame 1, and the frame moving assembly 7 can drive the frame 1 back and forth along the track assembly 6 move. The track assembly 6 can be fixed on the ground or other equipment, and plays a role of supporting and guiding the frame 1 . When the frame moving assembly 7 is working, the drive frame 1 is driven close to or away from the big nut, so that the demoulding shaft 3 is connected or separated from the big nut, so that the demoulding shaft 3 and the big nut are automatically meshed, and the degree of automation is improved.

The frame moving assembly 7 includes a frame driver 71 fixedly connected to the frame 1, and the track assembly 6 includes at least two mutually parallel guide rails 61, at least one guide rail 61 is provided with a rack assembly 72, and the frame driver 71 The output end of the rack is engaged with the rack assembly 72, and the frame driver 71 can move back and forth along the rack assembly 72, that is, the screw sleeve 51 is approached or away from the large nut that needs to be removed or installed.

The bottom of the frame 1 is fixed with a number of linear bearings 73 that are movably connected with the guide rail 61. The rack assembly 72 includes a rack 74 fixed on the guide rail 61. The output end of the frame driver 71 is fixed with a 74 meshing gears.

The output shaft of the frame driver 71 can be directly equipped with a gear, which is meshed with the rack 74 . In this embodiment, considering that the rack driver 71 will drive the entire device forward or backward, how to ensure the verticality of the rack driver 71 during work, so that the gear and the rack 74 can always mesh, ensuring that the rack 1 The stability of the movement process is also crucial. In this embodiment, the rack driver 71 is connected with a vertical output mechanism 8 arranged vertically, and the vertical output mechanism 8 can engage with the rack 74 .

As shown in Figure 4, the vertical output mechanism 8 includes a vertical output shaft 81 arranged on the frame driver 71, the vertical output shaft 81 is connected to the synchronous shaft 83 by a flange 82, the synchronous shaft 83 passes through the bearing in the bearing seat 84, and the bearing The seat 84 is fixed on the frame 1, the end of the synchronous shaft 83 passing through the bearing seat 84 is fixed with a gear, and the gear meshes with the rack 74, and the axis of the vertical output shaft 81, flange 82, synchronous shaft 83 and bearing seat 84 Heart lines coincide.

The frame 1 is provided with a driving mechanism 4, the driving mechanism 4 is connected with the demoulding shaft 3 and can drive the demoulding shaft 3 to rotate circumferentially, when the demoulding shaft 3 rotates circumferentially, it can drive the big nut to rotate, thereby screwing Loosen the nut and remove it. For those skilled in the art, the driving mechanism 4 should be easy to realize the functions of forward rotation and reverse rotation. For example, the driving mechanism 4 uses an electric motor or a hydraulic motor, and the forward and reverse rotation can be realized by controlling the direction of the current or the direction of the oil circuit, that is to say , according to the needs of production, this large nut removing machine can not only realize the function of removing large nuts, but also realize the function of installing large nuts, and the driving mechanism 4 can also be a pulley drive assembly.

As we all know, the demoulding shaft 3 needs to be driven by a driving mechanism to rotate circumferentially. The driving mechanism can be an electric motor, a hydraulic motor, a belt pulley driver and the like. This embodiment provides a preferred driving mechanism 4. The driving mechanism 4 includes a large gear 41 fixedly connected to the demoulding shaft 3. The demoulding shaft 3 and the large gear 41 can be connected by a spline, or by a bolt pair, etc. Connect, this is prior art, bull gear 41 connects gear drive assembly 42, and gear drive assembly 42 meshes with bull gear 41 so that bull gear 41 can be driven to rotate, and bull gear 41 can drive mold removal shaft 3 to rotate synchronously.

The gear drive assembly 42 includes a driving gear 43 meshed with the bull gear 41 and a gear driver 44 connected to the driving gear 43. The gear driver 44 has an output mechanism and the output mechanism is connected to the driving gear 43 so that the driving gear 43 can be driven to rotate in a circumferential direction. , the output mechanism mentioned here can be an output shaft or a power transmission mechanism connected with the gear driver 44, those skilled in the art should understand that the gear driver 44 can also be a motor or a pulley, etc., but it is preferably a hydraulic motor, which can provide a larger horsepower.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Although this article uses more frame 1, cabinet 2, demoulding shaft 3, driving mechanism 4, large gear 41, gear drive assembly 42, driving gear 43, gear driver 44, screw sleeve assembly 5, screw sleeve 51, keyway Structure 52, elastic component 53, spline sleeve 54, spline 55, spline groove 56, spring 57, coupling 58, tooth groove 59, track component 6, guide rail 61, frame moving component 7, frame driver 71, Rack assembly 72, linear bearing 73, rack 74, vertical output mechanism 8, vertical output shaft 81, flange 82, synchronous shaft 83, bearing housing 84, bearing 100, spring sleeve 101, ferrule 102 and other terms, but not The possibility of using other terms is not excluded. These terms are used only for the purpose of describing and explaining the essence of the present invention more conveniently; interpreting them as any kind of additional limitation is against the spirit of the present invention.

Claims (10)

1. the big nut dismounting assembly producing pile tube pipe die, including being arranged in cabinet (2) the form removal axle (3) that can circumferentially rotate, it is characterized in that, the end of described form removal axle (3) is dismountable to be connected to one and can form the swivel nut assembly (5) of snap-fit engagement with the big nut on pipe die, when form removal axle (3) rotates, band movable snail sleeve assembly (5) synchronous axial system is it is thus possible to make big nut circumferentially rotate, and described form removal axle (3) overlaps with the axial line of swivel nut assembly (5) for quill shaft and axial line.

2. the big nut dismounting assembly of production pile tube pipe die according to claim 1, it is characterised in that described swivel nut assembly (5) can move back and forth before and after the direction of axis line of form removal axle (3).

3. the big nut dismounting assembly of production pile tube pipe die according to claim 2, it is characterized in that, described swivel nut assembly (5) includes swivel nut (51), described swivel nut (51) forms snap-fit engagement with form removal axle (3) by keyway arrangements (52), described form removal axle (3) outer wall is arranged with an elastic parts (53), and described elastic parts (53) two ends bear against swivel nut assembly (5) and form removal axle (3).

4. the big nut dismounting assembly of production pile tube pipe die according to claim 3, it is characterized in that, described swivel nut assembly (5) also includes spline housing (54), described spline housing (54) is set on form removal axle (3) outer wall, described keyway arrangements (52) includes the spline (55) or the spline (56) that are arranged on spline housing (54), and it is arranged on spline (56) or the spline (55) of form removal axle (3) outer wall, described spline (55) is inserted in spline (56), spline (55) can move forward and backward along spline (56), described elastic parts (53) includes spring (57), described spring (57) two ends bear against spline housing (54) and form removal axle (3).

5. the big nut dismounting assembly of production pile tube pipe die according to claim 4, it is characterized in that, described swivel nut assembly (5) also includes being arranged on the shaft coupling (58) in the middle of swivel nut (51) and spline housing (54), described shaft coupling (58) is dismountable with swivel nut (51) and spline housing (54) respectively fixing to be connected, and described swivel nut (51) inwall is also circumferentially evenly arranged with some teeth groove (59).

6. the big nut dismounting assembly producing pile tube pipe die according to claim 1-5 any one, it is characterized in that, described cabinet (2) is fixed in frame (1), frame (1) is pressed on rail assembly (6), being fixed with a machine frame movement assembly (7) in frame (1), this machine frame movement assembly (7) can drive frame (1) to move forward and backward along rail assembly (6).

7. the big nut dismounting assembly of production pile tube pipe die according to claim 6, it is characterized in that, described machine frame movement assembly (7) includes the frame driver (71) that be connected fixing with frame (1), described rail assembly (6) includes at least two guide rails being parallel to each other (61), at least one guide rail (61) is provided with tooth bar assembly (72), the outfan of frame driver (71) engages with tooth bar assembly (72), and frame driver (71) can move forward and backward along tooth bar assembly (72).

8. the big nut dismounting assembly of production pile tube pipe die according to claim 7, it is characterized in that, described frame (1) bottom is fixed with some linear bearings (73) being flexibly connected with guide rail (61), described tooth bar assembly (72) includes the tooth bar (74) being fixed on guide rail (61), and the outfan of described frame driver (71) is fixed with and tooth bar (74) meshed gears.

9. the big nut dismounting assembly of production pile tube pipe die according to claim 8, it is characterized in that, described frame driver (71) is connected to a vertical output mechanism (8) being vertically arranged, and described vertical output mechanism (8) can engage with tooth bar (74).

10. the big nut dismounting assembly of production pile tube pipe die according to claim 9, it is characterized in that, vertical output mechanism (8) includes the vertical output axle (81) being arranged in frame driver (71), vertical output axle (81) connects synchronizing shaft (83) by flange (82), bearing in synchronizing shaft (83) traverse bearing block (84), bearing block (84) is fixed in frame (1), synchronizing shaft (83) is fixed with gear through the end of bearing block (84), this wheel and rack (74) engages, vertical output axle (81), flange (82), the axial line of synchronizing shaft (83) and bearing block (84) overlaps.