CN111922149B

CN111922149B - Equipment for preparing standard large-radius steel pipe bent pipe product

Info

Publication number: CN111922149B
Application number: CN202010916596.5A
Authority: CN
Inventors: 刘孟伟; 戴昊
Original assignee: Jinan Maike Pipeline Technology Co ltd
Current assignee: Jinan Maike Pipeline Technology Co ltd
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2024-04-16
Anticipated expiration: 2040-09-03
Also published as: CN111922149A

Abstract

The invention discloses equipment for preparing a standard large-radius steel pipe bent pipe product. The equipment for preparing the standard large-radius steel pipe bent pipe product comprises a strip-shaped rack and a workbench, wherein a hollow round platform with 1/4-2/5 of indent is arranged at the middle upper part of the front left vertical surface of the strip-shaped rack, and two sides of a main shaft are vertically arranged at the center of the hollow round platform by using bearings with seats respectively; the device also comprises a strip-shaped hollow box body, a main shaft driving device, a main clamping die device for the large-radius steel pipe bent pipe, a secondary clamping die device for the large-radius steel pipe bent pipe and a supporting and guiding device for the large-radius steel pipe. The preparation of a standard large-radius steel pipe bent pipe product is realized; the large-radius steel pipe bending die is convenient to replace, so that the replacement efficiency of the large-radius steel pipe bending die is improved, and the manufacturing cost of a large-radius steel pipe bending product is reduced; the labor intensity of workers is reduced.

Description

Equipment for preparing standard large-radius steel pipe bent pipe product

Technical Field

The invention belongs to equipment for preparing a standard steel pipe bent pipe product, and particularly relates to equipment for preparing a standard large-radius steel pipe bent pipe product.

Background

The large-radius steel pipe bent pipe product is a standard steel pipe bent pipe product with the bending radius of R600-1300mm, the two ends of the large-radius steel pipe bent pipe product are steel pipe straight pipe sections, and the length of the parts of the two ends of the large-radius steel pipe bent pipe product, which are the steel pipe straight pipe sections, is usually 1.5 times of the pipe diameter of the large-radius steel pipe. At present, a single-head hydraulic pipe bending device pipe bending die for a large-radius steel pipe bending product generally adopts an integrated wheel die, and products of each specification need to correspond to the wheel die with one radius. Particularly, the bending radius is large, the occupied area is large, the weight of the bending radius is more than 2 tons, the installation difficulty is high, the adjustment time and the efficiency are low, and meanwhile, the bending radius is frequently increased by 2 tons for installing and debugging, so that potential safety hazards exist and the labor intensity of workers is high. How to manufacture equipment for preparing a standard large-radius steel pipe bent pipe product can realize the preparation of the standard large-radius steel pipe bent pipe product, and can conveniently replace a large-radius steel pipe bent pipe die, so that the installation and adjustment difficulty of the large-radius steel pipe bent pipe die is reduced, the time for replacing the large-radius steel pipe bent pipe die is shortened, the replacement efficiency of the large-radius steel pipe bent pipe die is improved, the manufacturing cost of the large-radius steel pipe bent pipe product is reduced, the potential safety hazard is eliminated, and the labor intensity of workers is reduced.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: an apparatus for preparing standard large radius steel pipe bent pipe products is provided. The equipment for preparing the standard large-radius steel pipe bent pipe product can realize the preparation of the standard large-radius steel pipe bent pipe product; the large-radius steel pipe bending die can be conveniently replaced, the installation and adjustment difficulty of the large-radius steel pipe bending die is reduced, the time for replacing the large-radius steel pipe bending die is shortened, the replacement efficiency of the large-radius steel pipe bending die is improved, and the manufacturing cost of a large-radius steel pipe bending product is reduced; and the potential safety hazard can be eliminated, and the labor intensity of workers is reduced.

The technical scheme for solving the technical problems is as follows: the utility model provides a preparation standard large radius steel pipe return bend product's equipment, includes the horizontal bar frame that sets up in front and back and installs the workstation in the bar frame, characterized by: the upper middle and upper positions of the left and front side vertical surfaces of the strip-shaped rack are provided with 1/4-2/5 concave hollow round tables, two sides of a main shaft are vertically arranged on the central position of the hollow round table respectively by using a bearing with a seat, and the main shaft vertically arranged on the central position of the hollow round table by using the bearing with a seat is provided with parts extending out of the upper top surface and the lower bottom surface of the hollow round table respectively; the upper top plate and the lower bottom plate of the strip-shaped hollow box are respectively provided with a circular lug plate extending out of the left vertical surface of the strip-shaped hollow box, the left vertical surface of the strip-shaped hollow box is an inward concave circular arc surface matched with the circular arc outer surface of the hollow circular table, the middle position of the circular lug plate of the upper top plate of the strip-shaped hollow box is provided with an upward circular table convex part, the middle position of the circular lug plate of the lower bottom plate of the strip-shaped hollow box is provided with a downward circular table convex part, the middle circular table convex part of the circular lug plate of the upper top plate of the strip-shaped hollow box is provided with a through hole matched with the spindle, the middle circular lug plate convex part of the lower bottom plate of the strip-shaped hollow box is provided with a through hole matched with the spindle, the circular lug plate of the upper top plate and the lower bottom plate of the strip-shaped hollow box extend into the hollow circular table and are fixedly arranged on the parts of the upper top surface and the lower bottom surface of the hollow circular table of the spindle by using the through holes and keys arranged on the middle circular lug plate and the round lug plate of the lower bottom plate of the strip-shaped hollow box, the hollow box can move in the horizontal direction on the upper top surface of the spindle and the left side of the hollow circular table is provided with the left side of the hollow circular lug plate and the hollow box; the device also comprises a main shaft driving device, a main clamping die device of the large-radius steel pipe bent pipe, a secondary clamping die device of the large-radius steel pipe bent pipe, a large-radius steel pipe supporting and guiding device, and a hydraulic and electric control device;

The main shaft driving device comprises an A hydraulic cylinder and a B hydraulic cylinder, wherein a chain wheel is arranged at the upper part of the inner part of a hollow round platform of the main shaft, the main shaft driving device also comprises a chain encircling and installed on the main shaft chain wheel, a through hole through which the chain encircling and installed on the main shaft chain wheel can pass is formed in an inwards concave arc surface connected with the left front side elevation of the strip-shaped frame, the A hydraulic cylinder and the B hydraulic cylinder respectively correspond to each other, the chain encircling and installed on the main shaft chain wheel is installed on the strip-shaped frame in a left-right transverse state by using an A hydraulic cylinder installation seat and a B hydraulic cylinder installation seat, and the end part of a lever of the A hydraulic cylinder and the end part of a lever of the B hydraulic cylinder are respectively hinged and connected with two ends encircling and installed on the chain on the main shaft chain wheel by using V-shaped cylinder joints;

the main clamping die for the large-radius steel pipe bent pipe comprises a large-radius steel pipe bent pipe rotation clamping die and a large-radius steel pipe bent pipe follow-up rotation clamping die, wherein the large-radius steel pipe bent pipe rotation clamping die comprises a rotation connecting disc and a fan-shaped large-radius steel pipe bent pipe die, the fan-shaped large-radius steel pipe bent pipe die is installed on a base, the vertical section of the rotation connecting disc is in a convex shape, the fan-shaped large-radius steel pipe bent pipe die comprises 6A fan-shaped large-radius steel pipe bent pipe die blocks and 1B fan-shaped large-radius steel pipe bent pipe die blocks, a rolling groove with an inner concave semicircular arc is formed in the vertical surface on the larger radius side of the A fan-shaped large-radius steel pipe bent pipe die blocks, the circular arc of the groove bottom of the inner concave semicircular arc rolling groove is arranged in the vertical surface on the larger radius side of the A fan-shaped large-radius steel pipe bent pipe die blocks, the circular arc of the inner concave semicircular arc rolling groove is concentric with the A fan-shaped large-radius steel pipe bent pipe die blocks, the vertical surface on the larger radius side of the B fan-shaped large-radius steel pipe bent pipe die blocks is a linear groove with the inner concave semicircular arc groove bottom of the inner concave semicircular arc being 200-shaped, and the inner curved pipe bent pipe is 300-radius of the inner curved pipe bending pipe die; the installation base of the fan-shaped large-radius steel pipe bending die block comprises a 4A fan-shaped large-radius steel pipe bending die block installation base block and a 1B fan-shaped large-radius steel pipe bending die block installation base block, the vertical sections of the side vertical surfaces of the 4A fan-shaped large-radius steel pipe bending die block installation base block and the 1B fan-shaped large-radius steel pipe bending die block installation base block with smaller radius are raised head-shaped vertical surfaces matched with a rotating connecting disc with the vertical sections, and the vertical sections of the side vertical surfaces of the 4A fan-shaped large-radius steel pipe bending die block installation base block and the 1B fan-shaped large-radius steel pipe bending die block installation base block with larger radius are raised head-shaped vertical surfaces respectively; the rotary connecting disc is arranged on a part of the main shaft, which is positioned above a convex part of a round lug plate in the middle of a round table, of a top plate on a strip-shaped hollow box body, wherein the part, which is positioned on the part, with the convex part, of the round lug plate, of the main shaft, the part, which is positioned on the smaller radius, of the installation base block of the 4-sector large-radius steel pipe bending die block, and the part, which is positioned on the rotary connecting disc, of the 1-sector large-radius steel pipe bending die block, are sequentially buckled and arranged on the rotary connecting disc by bolts, the installation base blocks of the 4-sector large-radius steel pipe bending die block, which are sequentially buckled and arranged on the rotary connecting disc, of the 4-sector large-radius steel pipe bending die block, and the installation base block of the 1-sector large-radius steel pipe bending die block, which is positioned on the rotary connecting disc, of the adjacent 3-sector large-radius steel pipe bending die block installation base blocks, which are close to the 1-sector large-radius steel pipe bending die block, are sequentially buckled and arranged on the rotary connecting disc, are distributed in a right angle on a workbench; the side, with smaller radius, of the 6-piece A fan-shaped large-radius steel pipe bending die block and the 1-piece B fan-shaped large-radius steel pipe bending die block is buckled and installed on the vertical faces, with the larger radius, of the 4-piece A fan-shaped large-radius steel pipe bending die block installation base block and the 1-piece B fan-shaped large-radius steel pipe bending die block installation base block respectively, of the two adjacent vertical faces, with the larger radius, of the 4-piece A fan-shaped large-radius steel pipe bending die block installation base block and the 1-piece B fan-shaped large-radius steel pipe bending die block respectively, are of a mutual meshing structure;

The follow-up rotation clamping die for the large-radius steel pipe bent pipe comprises a follow-up rotation clamping die mounting seat and a follow-up rotation clamping die block, wherein the follow-up rotation clamping die block corresponds to the B sector-shaped large-radius steel pipe bent pipe die block, a rolling groove with a concave semicircular arc-shaped vertical section consistent with the radius of the large-radius steel pipe is formed in the left side vertical surface of the follow-up rotation clamping die block, and a circular arc line of the transverse section of the groove bottom of the concave semicircular arc-shaped rolling groove is a straight line section; the right vertical face of the follow-up rotation clamping die block is arranged on the left vertical face of the follow-up rotation clamping die mounting seat by using a vertical dovetail structure and bolts; the device also comprises a follow-up rotation clamping die mounting seat pushing device and a follow-up rotation clamping die block mounting seat guiding device, wherein the follow-up rotation clamping die mounting seat pushing device comprises a C hydraulic cylinder, an A follow-up rotation clamping die mounting seat pushing connecting rod and a B follow-up rotation clamping die mounting seat pushing connecting rod, one end of the A follow-up rotation clamping die mounting seat pushing connecting rod is hinged and rotatably arranged in a space at the upper part in the strip-shaped hollow box body by using a mounting shaft, one end of a pushing connecting rod of the B follow-up rotating clamping die mounting seat is hinged and rotatably mounted on the lower bottom surface of the A sliding plate by using a mounting shaft, a C hydraulic cylinder is mounted on the lower bottom plate of the strip-shaped hollow box body by using a C hydraulic cylinder mounting seat and a pin shaft, and the end part of a lever of the C hydraulic cylinder is respectively hinged and connected with the other end of the pushing connecting rod of the A follow-up rotating clamping die mounting seat and the other end of the pushing connecting rod of the B follow-up rotating clamping die mounting seat by using a V-shaped cylinder joint; the cylinder lever of the hydraulic cylinder extends out and can push against the connecting rod pushed by the mounting seat of the follow-up rotating clamping die A, push the connecting rod pushed by the mounting seat of the follow-up rotating clamping die B and sequentially push the mounting seat of the follow-up rotating clamping die A, the concave semicircular arc rolling groove with the circular arc of the transverse section of the bottom of the groove of the follow-up rotating clamping die block arranged on the mounting seat of the follow-up rotating clamping die A being a straight line segment, and the concave semicircular arc rolling groove with the circular arc of the transverse section of the bottom of the groove of the B sector-shaped large-radius steel pipe bending die block being a straight line segment to fixedly clamp the large-radius steel pipe;

The guide device of the follow-up rotation clamping die block mounting seat comprises an A guide block and 2A guide shafts, wherein the A guide block is mounted on the upper top surface of a strip-shaped hollow box body positioned on the right side of 2 guide rails, guide holes matched with the A guide shafts are formed in parallel in the upper part of the A guide block on the upper top surface of the strip-shaped hollow box body on the right side of the 2 guide rails, one end of each of the 2A guide shafts respectively penetrates through the 2 guide holes formed in parallel with the A guide block and is mounted in the 2 guide holes, and the other end of each of the 2A guide shafts is respectively fixedly connected with the right vertical surface of the follow-up rotation clamping die mounting seat in parallel;

the large-radius steel pipe bent pipe auxiliary clamping die device comprises an auxiliary clamping die mounting seat, an auxiliary clamping die block and a transverse I-shaped sliding block with a vertical section, wherein the transverse I-shaped sliding block with the vertical section is provided with a transverse part and a larger vertical part and a smaller vertical part which are integrally formed at two ends of the transverse part; a rolling groove with a vertical section which is consistent with the radius of the large-radius steel pipe and is of an inward concave semicircular arc shape is formed in the left side elevation of the auxiliary clamping die block, and a circular arc line of the transverse section of the groove bottom of the inward concave semicircular arc rolling groove formed in the left side elevation of the auxiliary clamping die block is a straight line section; the upper surface of a workbench close to the rear side of the large-radius steel pipe bent pipe follow-up rotation clamping die is longitudinally provided with 2 guide rails, a secondary clamping die mounting seat is mounted on the 2 guide rails longitudinally arranged on the top surface of the workbench by using a B sliding plate, sliding grooves matched with a transverse part of a transverse I-shaped sliding block with a vertical section and a smaller vertical part integrally formed on the transverse part are formed on the left vertical surface of the secondary clamping die mounting seat, the transverse part of the transverse I-shaped sliding block with the vertical section and the smaller vertical part integrally formed on the transverse part are mounted in the sliding grooves arranged on the left vertical surface of the secondary clamping die mounting seat in a front-back manner, and the right vertical surface of the secondary clamping die block is mounted on the left vertical surface of a larger vertical part of the transverse I-shaped sliding block outside the sliding groove of the secondary clamping die mounting seat; the device also comprises a secondary clamping die mounting seat pushing device, a secondary clamping die mounting seat guiding device and a secondary clamping die block pushing device, wherein the secondary clamping die mounting seat pushing device comprises a D hydraulic cylinder, a C secondary clamping die mounting seat pushing connecting rod and a D secondary clamping die mounting seat pushing connecting rod, one end of the C secondary clamping die mounting seat pushing connecting rod is hinged and rotatably arranged in the space inside the strip-shaped rack by using a mounting shaft, one end of a pushing connecting rod of the D auxiliary clamping die mounting seat is hinged and rotatably mounted on the lower bottom surface of the B sliding plate by using a mounting shaft, a D hydraulic cylinder is mounted on the strip-shaped rack by using a D hydraulic cylinder mounting seat and a pin shaft, and the end part of a lever of the D hydraulic cylinder is hinged and connected with the other end of the pushing connecting rod of the C auxiliary clamping die mounting seat and the other end of the pushing connecting rod of the D auxiliary clamping die mounting seat respectively by using a V-shaped cylinder joint; the cylinder lever of the hydraulic cylinder extends out, and can push the C auxiliary clamping die mounting seat to push the connecting rod, the D auxiliary clamping die mounting seat to push the connecting rod and sequentially push the auxiliary clamping die mounting seat arranged on the B sliding plate and the auxiliary clamping die block arranged on the auxiliary clamping die mounting seat, wherein the arc line of the transverse section of the bottom of the auxiliary clamping die block is a straight line section concave semicircular arc rolling groove, and the concave semicircular arc rolling groove of which the arc line of the transverse section of the bottom is a straight line section is matched with the concave semicircular arc rolling groove of the bottom of the B fan-shaped large-radius steel pipe bending die block to carry out auxiliary clamping on the large-radius steel pipe; the auxiliary clamping die block pushing device comprises an E auxiliary clamping die block front-back pushing cylinder, a square short cylinder matched with the E auxiliary clamping die block front-back pushing cylinder is fixedly arranged at the position of a sliding groove formed in the front-back position of the rear side elevation of the auxiliary clamping die mounting seat correspondingly, the E auxiliary clamping die block front-back pushing cylinder is arranged on the lower bottom surface of the square short cylinder fixedly arranged on the rear side elevation of the auxiliary clamping die mounting seat by using the E auxiliary clamping die block front-back pushing cylinder mounting seat, and a lever of the E auxiliary clamping die block front-back pushing cylinder is fixedly connected with a vertical section in the front-back sliding groove of the left side elevation of the auxiliary clamping die mounting seat in a transverse I-shaped sliding block rear elevation by using a connecting piece;

The auxiliary clamping die mounting seat guide device comprises a B guide block and 2B guide shafts, wherein the B guide block is mounted on the top surface of a strip-shaped workbench positioned on the right side of the 2 guide rails, guide holes matched with the B guide shafts are formed in parallel in the upper part of the B guide block mounted on the top surface of the strip-shaped workbench on the right side of the 2 guide rails, one end of each of the 2B guide shafts respectively penetrates through the 2 guide holes formed in parallel with the B guide block and is mounted in the 2 guide holes, and the other end of each of the 2B guide shafts is respectively fixedly connected with the right vertical surface of the auxiliary clamping die mounting seat in parallel;

the large-radius steel pipe supporting and guiding device comprises an F hydraulic cylinder, a core rod and a core rod, wherein the outer diameter of the core rod is consistent with the inner diameter of a large-radius steel pipe, the F hydraulic cylinder is transversely installed on the top surface, close to the right side, of the rear part of a workbench by using an F hydraulic cylinder installation seat, the end part of a lever of the F hydraulic cylinder is fixedly connected with one end of the core rod by using a connecting piece, the core rod, with the outer diameter consistent with the inner diameter of the large-radius steel pipe, is fixedly connected with the other end of the core rod by using a threaded blind hole arranged on the axis of the rear end of the lever, and when the lever of the F hydraulic cylinder extends out, the core rod, which pushes the core rod and the end part of the core rod to be fixedly installed, is located at a bending processing station of the large-radius steel pipe to be processed, can push one end of the large-radius steel pipe to be processed into the core rod fixedly connected with the core rod by using the connecting piece, and the core rod fixedly connected with the thread of the core rod can support and guide the large-radius steel pipe to be processed.

The hydraulic and electric appliance control device adopts the prior art and is controlled by a PLC control cabinet.

The application process of the invention is as follows: according to the bending radius of a steel pipe product with large radius to be processed, selecting a corresponding installation base of a sector steel pipe bending die block with large radius and a corresponding sector steel pipe bending die with large radius, sequentially using bolts to fasten and install a 4A sector steel pipe bending die block installation base block and a 1B sector steel pipe bending die block installation base block of the installation base of the sector steel pipe bending die block with large radius on a rotating connecting disc, and sequentially using bolts to fasten and install a 6A sector steel pipe bending die block with large radius and a 1B sector steel pipe bending die block of the sector steel pipe bending die on a 4A sector steel pipe bending die block installation base block and a 1B sector steel pipe bending die block installation base block; selecting a follow-up rotation clamping die block corresponding to the B sector-shaped large-radius steel pipe bending die block, and installing the follow-up rotation clamping die block corresponding to the B sector-shaped large-radius steel pipe bending die block on a follow-up rotation clamping die installation seat by using a vertical dovetail structure and bolts; selecting an auxiliary clamping die mounting seat, an auxiliary clamping die block and a transverse I-shaped sliding block with a vertical section corresponding to 6A sector large-radius steel pipe bending die blocks of the sector large-radius steel pipe bending die, wherein the vertical section is a transverse part of the transverse I-shaped sliding block, and the smaller vertical part is integrally formed by the transverse part and the transverse part of the transverse I-shaped sliding block and is arranged in a sliding groove arranged front and back on the left vertical surface of the auxiliary clamping die mounting seat; selecting a mandrel thread of a large-radius steel pipe supporting and guiding device consistent with the inner diameter of a large-radius steel pipe to be processed, installing the mandrel thread on a mandrel rod, pushing one end of the large-radius steel pipe to be processed into the mandrel rod fixedly connected with a lever of an F hydraulic cylinder and the mandrel fixedly connected with the mandrel rod thread, and adjusting the distance between the front end of the mandrel and the pipe orifice of the front end of the large-radius steel pipe to be processed to be 1.5 times of the pipe diameter of the large-radius steel pipe to be processed according to the standard that the lengths of the two ends of a bent pipe product of the large-radius steel pipe are the pipe diameters of the steel pipe straight pipe sections and are 1.5 times of the pipe diameters of the large-radius steel pipe; starting a cylinder of a hydraulic cylinder C, wherein a cylinder lever of the hydraulic cylinder extends out, pushing against a connecting rod pushed by a follow-up rotation clamping die mounting seat A, pushing a connecting rod pushed by a follow-up rotation clamping die mounting seat B, sequentially pushing a follow-up rotation clamping die mounting seat mounted on a slide plate A, and fixedly clamping a steel pipe to be processed by matching a concave semicircular arc rolling groove with a linear section and a semicircular arc rolling groove with a horizontal section of the groove bottom, wherein the arc is arranged on the follow-up rotation clamping die mounting seat B; starting a cylinder of a hydraulic cylinder D, enabling a cylinder lever of the hydraulic cylinder D to extend out, pushing a connecting rod by a secondary clamping die mounting seat C, pushing the connecting rod by the secondary clamping die mounting seat D, sequentially pushing a secondary clamping die mounting seat B mounted on a sliding plate B, and carrying out auxiliary clamping on a steel pipe to be processed by a concave semicircular arc rolling groove with a straight line section and a concave semicircular arc rolling groove with a straight line section, wherein the concave semicircular arc rolling groove is arranged on the bottom of the secondary clamping die block and is matched with the concave semicircular arc rolling groove with the straight line section; starting an A hydraulic cylinder and a B hydraulic cylinder, wherein the A hydraulic cylinder is contracted, the B hydraulic cylinder is extended, the A hydraulic cylinder is pulled by a chain drive main shaft sprocket hinged by a V-shaped cylinder joint to drive a main shaft to rotate clockwise, a key is arranged on a main shaft rotating connecting disc to drive a sector large-radius steel pipe bending die block mounting base and a sector large-radius steel pipe bending die, and a follow-up rotating clamping die block arranged on a left side elevation of a follow-up rotating clamping die mounting seat on 2 guide rails on the upper top surface of a strip-shaped hollow box body is rotated clockwise, and the follow-up rotating clamping die block arranged on the follow-up rotating clamping die mounting seat and the sector large-radius steel pipe bending die block to be processed fixedly clamped in a matched manner are subjected to first bending rotation clockwise; meanwhile, an E-pair clamping die block of the large-radius steel pipe bending auxiliary clamping die device pushes a cylinder lever to stretch out forwards and backwards, pushes a transverse I-shaped sliding block which is slidably arranged in a front sliding groove and a rear sliding groove on the left side vertical surface of a die mounting seat of the auxiliary clamping die and drives the auxiliary clamping die block on the left side vertical surface of a larger vertical part of the transverse I-shaped sliding block to assist the follow-up rotation clamping die block and the B-sector large-radius steel pipe bending die block to be matched and fixedly clamped to carry out first bending rotation along the clockwise direction; the method comprises the steps that a follow-up rotation clamping die block arranged on a follow-up rotation clamping die mounting seat and a B sector-shaped large-radius steel pipe bending die block of a sector-shaped large-radius steel pipe bending die are matched and fixedly clamped, a first bending rotation stroke is completed clockwise, a cylinder of a hydraulic cylinder is reset, a cylinder of an auxiliary clamping die block is pushed back and forth to reset, a hydraulic cylinder A and a hydraulic cylinder B are started again, a cylinder of the hydraulic cylinder D and a cylinder of the auxiliary clamping die block are started to push back and forth, the follow-up rotation clamping die block arranged on the follow-up rotation clamping die mounting seat and the B sector-shaped large-radius steel pipe bending die block of the sector-shaped large-radius steel pipe bending die are matched and fixedly clamped, and second bending rotation is performed clockwise; the method comprises the steps of resetting an F hydraulic cylinder, resetting a C hydraulic cylinder, resetting a D hydraulic cylinder, resetting an E auxiliary clamping die block, pushing the cylinder back and forth to reset the E auxiliary clamping die block, and taking down the finished large-radius steel pipe bent pipe product to be processed and storing the product into a large-radius steel pipe bent pipe product bin; starting an A hydraulic cylinder, a B hydraulic cylinder, contracting the B hydraulic cylinder lever, extending the A hydraulic cylinder lever, pulling a chain drive main shaft sprocket which is hinged by a V-shaped cylinder joint by the A hydraulic cylinder lever to drive a main shaft to rotate and reset in a anticlockwise direction, installing a fan-shaped large-radius steel pipe bending die block installation base and a fan-shaped large-radius steel pipe bending die on a main shaft rotation connecting disc by using a key, installing a follow-up rotation clamping die block on a left side elevation of a follow-up rotation clamping die installation base on 2 guide rails on the upper top surface of a strip-shaped hollow box body, rotating and resetting in the anticlockwise direction, and repeating the preparation process of the next large-radius steel pipe bending to be processed.

The beneficial effects of the invention are as follows: as the front and the back of the invention are transversely provided with the strip-shaped rack and the workbench arranged on the strip-shaped rack, the middle upper part of the front left vertical surface of the strip-shaped rack is provided with the hollow round platform with 1/4-2/5 of the indent, and two sides of a main shaft are respectively vertically arranged on the center of the hollow round platform by using the bearing with the seat; the device is characterized by further comprising a strip-shaped hollow box body, a main shaft driving device, a main clamping die device for the large-radius steel pipe bent pipe, a secondary clamping die device for the large-radius steel pipe bent pipe, a large-radius steel pipe supporting and guiding device and a hydraulic and electric control device; the invention realizes the preparation of the standard large-radius steel pipe bent pipe product; the large-radius steel pipe bending die is convenient to replace, the installation and adjustment difficulty of the large-radius steel pipe bending die is reduced, the time for replacing the large-radius steel pipe bending die is shortened, the replacement efficiency of the large-radius steel pipe bending die is improved, and the manufacturing cost of a large-radius steel pipe bending product is reduced; and the potential safety hazard is eliminated, and the labor intensity of workers is reduced.

Drawings

The invention is further described below with reference to the drawings and examples;

FIG. 1 is a top view of the present invention

FIG. 2 is a schematic diagram of the structure of the present invention;

FIG. 3 is a right side view of the present invention;

FIG. 4 is an enlarged schematic view of the large radius steel pipe elbow rotary clamping mold of the present invention;

FIG. 5 is an enlarged top view of the large radius steel pipe elbow rotary clamping mold of the present invention;

in the accompanying drawings: 1. the mandrel bar comprises a bar-shaped frame, a 2 workbench, a 3 hollow round platform, a 4 main shaft, a 5 bar-shaped hollow box body, a 6.A hydraulic cylinder, a 7.B hydraulic cylinder, a 8 sprocket, a 9 rotating connecting disc, a 10.A fan-shaped large-radius steel pipe bending die block, a 11.B fan-shaped large-radius steel pipe bending die block, a 12.A fan-shaped large-radius steel pipe bending die block mounting base block, a 13.B fan-shaped large-radius steel pipe bending die block mounting base block, a 14 follow-up rotating clamping die mounting seat, a 15 follow-up rotating clamping die block, a 16.C hydraulic cylinder, a 17.A follow-up rotating clamping die mounting seat pushing connecting rod, a 18.B follow-up rotating clamping die mounting seat pushing connecting rod, a 19.A guide block, a 20.A guide shaft, a 21.A auxiliary clamping die mounting seat, a 22.auxiliary clamping die block, a 23.A vertical cross-shaped sliding block, a 24.D hydraulic cylinder, a 25.E auxiliary clamping die block front and back pushing cylinder, a 26. Square short cylinder, a 27.B guide block, a 28.B guide shaft, a 29.F, a 30.F guide shaft, a mandrel bar and a 31.

Detailed Description

The present invention will be described in further detail with reference to the following examples.

Example 1

As shown in fig. 1, 2, 3, 4 and 5, an apparatus for preparing a standard large-radius bent steel pipe product comprises a strip-shaped frame 1 transversely arranged in front and back and a workbench 2 mounted on the strip-shaped frame (the side close to the workbench is the front side of the workbench, the side far from the workbench is the rear side of the workbench, the left side of the viewer is the left side of the workbench, and the right side of the viewer is the right side of the workbench), and is characterized in that: a hollow round table 3 with 1/4 concave is arranged at the middle upper part of the left front side elevation of the strip-shaped rack 1, two sides of a main shaft 4 are vertically arranged at the center of the hollow round table 3 by using a bearing with a seat, and the main shaft 4 vertically arranged at the center of the hollow round table 3 by using the bearing with a seat is respectively provided with a part extending out of the upper top surface and the lower bottom surface of the hollow round table 3; the utility model also comprises a strip-shaped hollow box body 5, the upper top plate and the lower bottom plate of the strip-shaped hollow box body 5 are respectively provided with a round lug plate extending out of the left vertical surface of the strip-shaped hollow box body, the left vertical surface of the strip-shaped hollow box body 5 is an inward concave arc surface matched with the circular arc outer surface of the hollow round table 3, the middle position of the round lug plate of the upper top plate of the strip-shaped hollow box body 5 is provided with an upward round table bulge part, the middle position of the round lug plate of the lower bottom plate of the strip-shaped hollow box body 5 is provided with a downward round table bulge part, the round table bulge part of the middle part of the round lug plate of the upper top plate of the strip-shaped hollow box body 5 is provided with a through hole matched with the main shaft 4, the round table bulge part of the middle part of the round lug plate of the lower bottom plate of the strip-shaped hollow box body 5 is provided with a through hole matched with the main shaft 4, the strip-shaped hollow box 5 with the upper top plate and the lower bottom plate respectively provided with the round lug plates extending into the hollow round platform 3 and fixedly installed on the parts of the main shaft 4 extending out of the upper top surface and the lower bottom surface of the hollow round platform 3 by using through holes and keys arranged on the convex parts of the round lug plates and the middle round platform of the round lug plates respectively provided with the upper top plate and the lower bottom plate and installed on the main shaft 4 can do circular motion under the power of the main shaft, the left and right longitudinal lengths of the strip-shaped hollow box 5 extending into the hollow round platform and installed on the parts of the main shaft 4 extending out of the upper top surface and the lower bottom surface of the hollow round platform are consistent with the left and right transverse lengths of the workbench 2, and the main shaft 4 is also provided with the parts extending out of the convex parts of the middle round lug plates of the upper top plate of the strip-shaped hollow box 5; the device also comprises a main shaft driving device, a main clamping die device of the large-radius steel pipe bent pipe, a secondary clamping die device of the large-radius steel pipe bent pipe, a large-radius steel pipe supporting and guiding device, and a hydraulic and electric control device;

The main shaft driving device comprises an A hydraulic cylinder 6 and a B hydraulic cylinder 7, wherein a chain wheel 8 is arranged at the upper part of the inner part of a hollow round platform 3 of a main shaft 4, the main shaft driving device further comprises a chain which is arranged on the main shaft chain wheel 8 in a surrounding manner, a through hole which can pass through the chain which is arranged on the main shaft chain wheel 8 in a surrounding manner is arranged on an inward concave arc surface which is connected with the left front side elevation of a strip-shaped frame 1, the A hydraulic cylinder 6 and the B hydraulic cylinder 7 respectively correspond to the chain which is arranged on the main shaft chain wheel 8 in a surrounding manner, the A hydraulic cylinder mounting seat and the B hydraulic cylinder mounting seat are arranged on the strip-shaped frame 1 in a left-right transverse state, and the lever end part of the A hydraulic cylinder 6 and the lever end part of the B hydraulic cylinder 7 are respectively hinged with two ends of the chain which is arranged on the main shaft chain wheel 8 in a surrounding manner by using V-shaped cylinder joints;

the main clamping die for the large-radius steel pipe bent pipe comprises a large-radius steel pipe bent pipe rotation clamping die and a large-radius steel pipe bent pipe follow-up rotation clamping die, wherein the large-radius steel pipe bent pipe rotation clamping die comprises a rotation connecting disc 9 and a fan-shaped large-radius steel pipe bent pipe die block mounting base, the vertical section of the rotation connecting disc is in a convex shape, the fan-shaped large-radius steel pipe bent pipe die comprises 6A fan-shaped large-radius steel pipe bent pipe die blocks 10 and 1B fan-shaped large-radius steel pipe bent pipe die blocks 11, a rolling groove which is consistent with the radius of the large-radius steel pipe is formed in the vertical surface on the larger side of the A fan-shaped large-radius steel pipe bent pipe die block 10, the circular arc of the bottom of the inner concave semicircular arc rolling groove which is arranged in the vertical surface on the larger side of the A fan-shaped large-radius steel pipe bent pipe die block 10 is concentric with the center of the A fan-shaped large-radius steel pipe bent pipe die block 10, the vertical surface on the larger side of the B fan-shaped large-radius steel pipe bent pipe die block 11 is provided with the rolling groove which is in the inner semicircular arc, and the inner groove which is arranged on the larger side of the vertical surface on the larger side of the fan-shaped large-radius steel pipe bent pipe die block 11 is in the radial direction, and the inner groove is in the radial direction of the radial groove which is 200; the installation base of the fan-shaped large-radius steel pipe bending die block comprises a 4A fan-shaped large-radius steel pipe bending die block installation base block 12 and a 1B fan-shaped large-radius steel pipe bending die block installation base block 13, the vertical sections of the side vertical surfaces of the smaller radius of the 4A fan-shaped large-radius steel pipe bending die block installation base block 12 and the 1B fan-shaped large-radius steel pipe bending die block installation base block 13 are raised head-shaped vertical surfaces matched with a rotating connecting disc with the vertical sections in a raised head shape, and the vertical sections of the side vertical surfaces of the larger radius side vertical surfaces of the 4A fan-shaped large-radius steel pipe bending die block installation base block 12 and the 1B fan-shaped large-radius steel pipe bending die block installation base block 13 are raised head-shaped vertical surfaces respectively; the rotary connecting disc 9 is arranged on a part of the main shaft 4 above a convex part of a round lug plate in the middle of a round table arranged on a top plate of the strip-shaped hollow box body 5 by using a key, wherein one side, with smaller radius, of the 4A sector-shaped large-radius steel pipe bending die block installation base block 12 and 1B sector-shaped large-radius steel pipe bending die block installation base block 13 is sequentially buckled and arranged on the rotary connecting disc 9 by using bolts, the 4A sector-shaped large-radius steel pipe bending die block installation base block 12 and 1B sector-shaped large-radius steel pipe bending die block installation base block 13 which are sequentially buckled and arranged on the rotary connecting disc 9 by using bolts are in a mutual meshing structure, and in an initial state, the adjacent 3A sector-shaped large-radius steel pipe bending die block installation base blocks 12 which are close to the 1B sector-shaped large-radius steel pipe bending die block installation base block 13 and are sequentially buckled and arranged on the rotary connecting disc 9 are distributed on the workbench 2 in a right angle; the side, with smaller radius, of the 6-piece A fan-shaped large-radius steel pipe bending die block 10 and the 1-piece B fan-shaped large-radius steel pipe bending die block 11 is buckled and installed on the vertical sections, with larger radius, of the 4-piece A fan-shaped large-radius steel pipe bending die block installation base block 12 and the 1-piece B fan-shaped large-radius steel pipe bending die block installation base block 13 respectively, of the raised head-shaped vertical surfaces, and the adjacent two vertical surfaces, with larger radius, of the 6-piece A fan-shaped large-radius steel pipe bending die block 10 and the 1-piece B fan-shaped large-radius steel pipe bending die block 11 are respectively, of the raised head-shaped vertical surfaces, which are buckled and installed on the 4-piece A fan-shaped large-radius steel pipe bending die block installation base block 12 and the 1-piece B fan-shaped large-radius steel pipe bending die block 13 respectively, are of the mutually-meshed structures;

The follow-up rotation clamping die for the large-radius steel pipe bent pipe comprises a follow-up rotation clamping die mounting seat 14 and a follow-up rotation clamping die block 15, wherein the follow-up rotation clamping die block 15 corresponds to the B sector-shaped large-radius steel pipe bent pipe die block 11, a rolling groove with a vertical section being a concave semicircular arc shape and consistent with the radius of the large-radius steel pipe is formed in the left side vertical face of the follow-up rotation clamping die block 15, and the circular arc line of the transverse section of the groove bottom of the concave semicircular arc rolling groove formed in the left side vertical face of the follow-up rotation clamping die block 15 is a straight line section; the top surface of the strip-shaped hollow box body 5 arranged on the main shaft 4 is longitudinally provided with 2 guide rails, the follow-up rotation clamping die mounting seat 14 is arranged on the 2 guide rails longitudinally arranged on the top surface of the strip-shaped hollow box body 5 by using an A sliding plate, and the right side elevation of the follow-up rotation clamping die block 15 is arranged on the left side elevation of the follow-up rotation clamping die mounting seat 14 by using a vertical dovetail structure and bolts; the device also comprises a follow-up rotation clamping die mounting seat pushing device and a follow-up rotation clamping die block mounting seat guiding device, wherein the follow-up rotation clamping die mounting seat pushing device comprises a C hydraulic cylinder 16, an A follow-up rotation clamping die mounting seat pushing connecting rod 17 and a B follow-up rotation clamping die mounting seat pushing connecting rod 18, one end of the A follow-up rotation clamping die mounting seat pushing connecting rod 17 is hinged and rotatably arranged in a space at the upper part in the bar-shaped hollow box body 5 by using a mounting shaft, one end of a pushing connecting rod 18 of the B follow-up rotating clamping die is hinged and rotatably installed on the lower bottom surface of the A sliding plate by using an installation shaft, a C hydraulic cylinder 16 is installed on the lower bottom plate of the strip-shaped hollow box body 5 by using a C hydraulic cylinder installation seat and a pin shaft, and the end part of a lever of a C hydraulic cylinder is respectively hinged and connected with the other end of a pushing connecting rod 17 of the A follow-up rotating clamping die installation seat and the other end of the pushing connecting rod 18 of the B follow-up rotating clamping die installation seat by using a V-shaped cylinder joint; the cylinder lever of the hydraulic cylinder extends out, and can push against the pushing connecting rod 17 of the follow-up rotating clamping die mounting seat A, push the connecting rod 18 of the follow-up rotating clamping die mounting seat B and sequentially push the follow-up rotating clamping die mounting seat 14 arranged on the sliding plate A, and the concave semicircular arc rolling groove with the arc line of the transverse section of the groove bottom of the follow-up rotating clamping die mounting seat 15 arranged on the follow-up rotating clamping die mounting seat 14 being a straight line segment and the concave semicircular arc rolling groove with the arc line of the transverse section of the groove bottom being a straight line segment arranged on the curved pipe die block 11 of the sector-shaped large-radius steel pipe fixedly clamp the large-radius steel pipe;

The guide device of the follow-up rotation clamping die block mounting seat comprises an A guide block 19 and 2A guide shafts 20, wherein the A guide block 19 is mounted on the upper top surface of a strip-shaped hollow box body 5 positioned on the right side of 2 guide rails, guide holes matched with the A guide shafts 20 are formed in parallel in the upper part of the A guide block 19 mounted on the upper top surface of the strip-shaped hollow box body 5 on the right side of the 2 guide rails, one end of each of the 2A guide shafts 20 respectively penetrates through the 2 guide holes formed in parallel with the A guide block 19 and is mounted in each of the 2 guide holes, and the other end of each of the 2A guide shafts 20 is respectively and fixedly connected with the right vertical surface of the follow-up rotation clamping die mounting seat 14 in parallel;

the large-radius steel pipe bent pipe auxiliary clamping die device comprises an auxiliary clamping die mounting seat 21, an auxiliary clamping die block 22 and a transverse I-shaped sliding block 23 with a vertical section, wherein the transverse I-shaped sliding block with the vertical section is provided with a transverse part and a larger vertical part and a smaller vertical part which are integrally formed at two ends of the transverse part; a rolling groove with a vertical section which is consistent with the radius of the large-radius steel pipe and is of an inward concave semicircular arc shape is formed in the left side vertical surface of the auxiliary clamping die block 22, and a circular arc line of the transverse section of the groove bottom of the inward concave semicircular arc rolling groove which is formed in the left side vertical surface of the auxiliary clamping die block 22 is of a straight line section; the upper surface of a workbench 2 close to the rear side of the large-radius steel pipe bent pipe follow-up rotary clamping die is longitudinally provided with 2 guide rails, a secondary clamping die mounting seat 21 is mounted on the upper surface of the workbench 2 by using a B sliding plate, sliding grooves matched with smaller vertical parts integrally formed by transverse H-shaped sliding blocks and transverse parts with vertical sections are formed on the left vertical surface of the secondary clamping die mounting seat 21 in front and back, smaller vertical parts integrally formed by transverse H-shaped sliding blocks and transverse parts with vertical sections are mounted in the sliding grooves formed on the left vertical surface of the secondary clamping die mounting seat 21 in front and back, and right vertical surfaces of secondary clamping die blocks 22 are mounted on the left vertical surface of larger vertical parts, with the transverse H-shaped sliding blocks 23 positioned outside the sliding grooves of the secondary clamping die mounting seat 21, of the vertical sections; the device also comprises a secondary clamping die mounting seat pushing device, a secondary clamping die mounting seat guiding device and a secondary clamping die block pushing device, wherein the secondary clamping die mounting seat pushing device comprises a D hydraulic cylinder 24, a C secondary clamping die mounting seat pushing connecting rod (not shown in the drawing of the specification) and a D secondary clamping die mounting seat pushing connecting rod (not shown in the drawing of the specification), one end of the C secondary clamping die mounting seat pushing connecting rod is hinged and rotatably arranged in the space inside the strip-shaped rack by using a mounting shaft, one end of a pushing connecting rod of the D auxiliary clamping die mounting seat is hinged and rotatably mounted on the lower bottom surface of the B sliding plate by using a mounting shaft, a D hydraulic cylinder 24 is mounted on the strip-shaped rack 1 by using a D hydraulic cylinder mounting seat and a pin shaft, and the end part of a cylinder lever of the D hydraulic cylinder is hinged and connected with the other end of the pushing connecting rod of the C auxiliary clamping die mounting seat and the other end of the pushing connecting rod of the D auxiliary clamping die mounting seat respectively by using a V-shaped cylinder joint; the cylinder lever of the hydraulic cylinder extends out, so that a C auxiliary clamping die mounting seat pushing connecting rod can be propped up, a D auxiliary clamping die mounting seat pushing connecting rod can be propped up, an auxiliary clamping die mounting seat 21 arranged on a B sliding plate and an auxiliary clamping die block 22 arranged on the auxiliary clamping die mounting seat 21 can be sequentially pushed, a groove bottom transverse section circular arc line is a straight line section concave semicircular arc rolling groove, a groove bottom transverse section circular arc line arranged on the B fan-shaped large-radius steel pipe bending die block 11 is a straight line section concave semicircular arc rolling groove, and the groove bottom transverse section circular arc line arranged on the B fan-shaped large-radius steel pipe bending die block 11 is matched with the straight line section concave semicircular arc rolling groove to carry out auxiliary clamping on the large-radius steel pipe; the auxiliary clamping die block pushing device comprises an E auxiliary clamping die block front-back pushing cylinder 25, a square short cylinder 26 matched with the E auxiliary clamping die block front-back pushing cylinder 25 is fixedly arranged at the position of the sliding groove corresponding to the front-back position of the rear side elevation of the auxiliary clamping die mounting seat 21, the E auxiliary clamping die block front-back pushing cylinder 25 is arranged on the lower bottom surface of the square short cylinder 26 fixedly arranged on the rear side elevation of the auxiliary clamping die mounting seat 21 by using the E auxiliary clamping die block front-back pushing cylinder mounting seat, and the E auxiliary clamping die block front-back pushing cylinder lever is fixedly connected with the rear elevation of the transverse I-shaped sliding block 23 in a sliding manner by using a connecting piece and a vertical section in the front-back sliding groove of the left side elevation of the auxiliary clamping die mounting seat 21;

The auxiliary clamping die mounting seat guide device comprises a B guide block 27 and 2B guide shafts 28, wherein the B guide block 27 is arranged on the top surface of a strip-shaped workbench 2 positioned on the right side of 2 guide rails, guide holes matched with the B guide shafts 28 are formed in parallel in the upper part of the B guide block 27 arranged on the top surface of the strip-shaped workbench on the right side of the 2 guide rails, one end of each of the 2B guide shafts 28 respectively penetrates through the 2 guide holes formed in parallel in the B guide block 27 and is arranged in each of the 2 guide holes, and the other end of each of the 2B guide shafts 28 is respectively and fixedly connected with the right vertical surface of the auxiliary clamping die mounting seat 21 in parallel;

the large-radius steel pipe supporting and guiding device comprises an F hydraulic cylinder 29, a core rod 30 and a core rod 31, wherein the outer diameter of the core rod 30 is consistent with the inner diameter of a large-radius steel pipe, the F hydraulic cylinder 29 is transversely arranged on the top surface, close to the right, of the rear part of a workbench 2 by using an F hydraulic cylinder mounting seat, the end part of a lever of the F hydraulic cylinder is fixedly connected with one end of the core rod 31 by using a connecting piece, the core rod 30 with the outer diameter consistent with the inner diameter of the large-radius steel pipe is fixedly connected with the other end of the core rod 31 by using a threaded blind hole arranged on the axis of the rear end of the lever of the F hydraulic cylinder, when the F hydraulic cylinder 29 is extended out, the core rod 30 for pushing the core rod 31 and the end part of the core rod 31 to be fixedly arranged is positioned at a bending processing station of the large-radius steel pipe to be processed, one end of the large-radius steel pipe to be processed can be pushed into the core rod 31 fixedly connected with the core rod 30 fixedly connected with the core rod 31 by the threaded rod, and the core rod 30 fixedly connected with the core rod 31 is capable of supporting and guiding the large-radius steel pipe to be processed.

Example 2

As shown in fig. 1, 2, 3, 4 and 5, an apparatus for preparing a standard large-radius bent steel pipe product comprises a strip-shaped frame 1 transversely arranged in front and back and a workbench 2 mounted on the strip-shaped frame (the side close to the workbench is the front side of the workbench, the side far from the workbench is the rear side of the workbench, the left side of the viewer is the left side of the workbench, and the right side of the viewer is the right side of the workbench), and is characterized in that: the middle upper part of the front left vertical surface of the strip-shaped rack 1 is provided with a hollow round platform 3 with 2/5 concave, two sides of a main shaft 4 are vertically arranged on the center of the hollow round platform 3 by using a bearing with a seat, and the main shaft 4 vertically arranged on the center of the hollow round platform 3 by using the bearing with a seat is respectively provided with a part extending out of the upper top surface and the lower bottom surface of the hollow round platform 3; the utility model also comprises a strip-shaped hollow box body 5, the upper top plate and the lower bottom plate of the strip-shaped hollow box body 5 are respectively provided with a round lug plate extending out of the left vertical surface of the strip-shaped hollow box body, the left vertical surface of the strip-shaped hollow box body 5 is an inward concave arc surface matched with the circular arc outer surface of the hollow round table 3, the middle position of the round lug plate of the upper top plate of the strip-shaped hollow box body 5 is provided with an upward round table bulge part, the middle position of the round lug plate of the lower bottom plate of the strip-shaped hollow box body 5 is provided with a downward round table bulge part, the round table bulge part of the middle part of the round lug plate of the upper top plate of the strip-shaped hollow box body 5 is provided with a through hole matched with the main shaft 4, the round table bulge part of the middle part of the round lug plate of the lower bottom plate of the strip-shaped hollow box body 5 is provided with a through hole matched with the main shaft 4, the strip-shaped hollow box 5 with the upper top plate and the lower bottom plate respectively provided with the round lug plates extending into the hollow round platform 3 and fixedly installed on the parts of the main shaft 4 extending out of the upper top surface and the lower bottom surface of the hollow round platform 3 by using through holes and keys arranged on the convex parts of the round lug plates and the middle round platform of the round lug plates respectively provided with the upper top plate and the lower bottom plate and installed on the main shaft 4 can do circular motion under the power of the main shaft, the left and right longitudinal lengths of the strip-shaped hollow box 5 extending into the hollow round platform and installed on the parts of the main shaft 4 extending out of the upper top surface and the lower bottom surface of the hollow round platform are consistent with the left and right transverse lengths of the workbench 2, and the main shaft 4 is also provided with the parts extending out of the convex parts of the middle round lug plates of the upper top plate of the strip-shaped hollow box 5; the device also comprises a main shaft driving device, a main clamping die device of the large-radius steel pipe bent pipe, a secondary clamping die device of the large-radius steel pipe bent pipe, a large-radius steel pipe supporting and guiding device, and a hydraulic and electric control device;

the main clamping die for the large-radius steel pipe bent pipe comprises a large-radius steel pipe bent pipe rotation clamping die and a large-radius steel pipe bent pipe follow-up rotation clamping die, wherein the large-radius steel pipe bent pipe rotation clamping die comprises a rotation connecting disc 9 and a fan-shaped large-radius steel pipe bent pipe die block mounting base, the vertical section of the rotation connecting disc is in a convex shape, the fan-shaped large-radius steel pipe bent pipe die comprises 6A fan-shaped large-radius steel pipe bent pipe die blocks 10 and 1B fan-shaped large-radius steel pipe bent pipe die blocks 11, a rolling groove which is consistent with the radius of the large-radius steel pipe is formed in the vertical surface on the larger side of the A fan-shaped large-radius steel pipe bent pipe die block 10, the circular arc of the bottom of the inner concave semicircular arc rolling groove which is arranged in the vertical surface on the larger side of the A fan-shaped large-radius steel pipe bent pipe die block 10 is concentric with the center of the A fan-shaped large-radius steel pipe bent pipe die block 10, the vertical surface on the larger side of the B fan-shaped large-radius steel pipe bent pipe die block 11 is provided with the rolling groove which is in the inner semicircular arc, and the inner semicircular arc of the vertical surface on the larger side of the fan-shaped large-radius steel pipe bent pipe die block 11 is 300; the installation base of the fan-shaped large-radius steel pipe bending die block comprises a 4A fan-shaped large-radius steel pipe bending die block installation base block 12 and a 1B fan-shaped large-radius steel pipe bending die block installation base block 13, the vertical sections of the side vertical surfaces of the smaller radius of the 4A fan-shaped large-radius steel pipe bending die block installation base block 12 and the 1B fan-shaped large-radius steel pipe bending die block installation base block 13 are raised head-shaped vertical surfaces matched with a rotating connecting disc with the vertical sections in a raised head shape, and the vertical sections of the side vertical surfaces of the larger radius side vertical surfaces of the 4A fan-shaped large-radius steel pipe bending die block installation base block 12 and the 1B fan-shaped large-radius steel pipe bending die block installation base block 13 are raised head-shaped vertical surfaces respectively; the rotary connecting disc 9 is arranged on a part of the main shaft 4 above a convex part of a round lug plate in the middle of a round table arranged on a top plate of the strip-shaped hollow box body 5 by using a key, wherein one side, with smaller radius, of the 4A sector-shaped large-radius steel pipe bending die block installation base block 12 and 1B sector-shaped large-radius steel pipe bending die block installation base block 13 is sequentially buckled and arranged on the rotary connecting disc 9 by using bolts, the 4A sector-shaped large-radius steel pipe bending die block installation base block 12 and 1B sector-shaped large-radius steel pipe bending die block installation base block 13 which are sequentially buckled and arranged on the rotary connecting disc 9 by using bolts are in a mutual meshing structure, and in an initial state, the adjacent 3A sector-shaped large-radius steel pipe bending die block installation base blocks 12 which are close to the 1B sector-shaped large-radius steel pipe bending die block installation base block 13 and are sequentially buckled and arranged on the rotary connecting disc 9 are distributed on the workbench 2 in a right angle; the side, with smaller radius, of the 6-piece A fan-shaped large-radius steel pipe bending die block 10 and the 1-piece B fan-shaped large-radius steel pipe bending die block 11 is buckled and installed on the vertical sections, with larger radius, of the 4-piece A fan-shaped large-radius steel pipe bending die block installation base block 12 and the 1-piece B fan-shaped large-radius steel pipe bending die block installation base block 13 respectively, of the raised head-shaped vertical surfaces, and the adjacent two vertical surfaces, with larger radius, of the 6-piece A fan-shaped large-radius steel pipe bending die block 10 and the 1-piece B fan-shaped large-radius steel pipe bending die block 11 are respectively, of the raised head-shaped vertical surfaces, which are buckled and installed on the 4-piece A fan-shaped large-radius steel pipe bending die block installation base block 12 and the 1-piece B fan-shaped large-radius steel pipe bending die block 13 respectively, are of the mutually-meshed structures;

From the above description, it is apparent to those skilled in the art that various changes and modifications can be made without departing from the scope of the technical spirit of the invention. The present invention is not limited to the prior art.

Claims

1. The utility model provides a preparation standard large radius steel pipe return bend product's equipment, includes the horizontal bar frame that sets up in front and back and installs workstation, characterized by in the bar frame: the middle upper part of the vertical surface at the left front side of the strip-shaped rack is provided with a hollow round platform with 1/4-2/5 of concave, two sides of a main shaft are vertically arranged at the center of the hollow round platform respectively by using a bearing with a seat, and the main shaft vertically arranged at the center of the hollow round platform by using the bearing with a seat is provided with parts extending out of the upper top surface and the lower bottom surface of the hollow round platform respectively; the upper top plate and the lower bottom plate of the strip-shaped hollow box are respectively provided with a circular lug plate extending out of the left vertical surface of the strip-shaped hollow box, the left vertical surface of the strip-shaped hollow box is an inward concave circular arc surface matched with the circular arc outer surface of the hollow circular table, the middle position of the circular lug plate of the upper top plate of the strip-shaped hollow box is provided with an upward circular table convex part, the middle position of the circular lug plate of the lower bottom plate of the strip-shaped hollow box is provided with a downward circular table convex part, the middle circular table convex part of the circular lug plate of the upper top plate of the strip-shaped hollow box is provided with a through hole matched with the spindle, the middle circular lug plate convex part of the lower bottom plate of the strip-shaped hollow box is provided with a through hole matched with the spindle, the circular lug plate of the upper top plate and the lower bottom plate of the strip-shaped hollow box extend into the hollow circular table and are fixedly arranged on the parts of the upper top surface and the lower bottom surface of the hollow circular table of the spindle by using the through holes and keys arranged on the middle circular lug plate and the round lug plate of the lower bottom plate of the strip-shaped hollow box, the hollow box can move in the horizontal direction on the upper top surface of the spindle and the left side of the hollow circular table is provided with the left side of the hollow circular lug plate and the hollow box; the device also comprises a main shaft driving device, a main clamping die device of the large-radius steel pipe bent pipe, a secondary clamping die device of the large-radius steel pipe bent pipe, a large-radius steel pipe supporting and guiding device, and a hydraulic and electric control device;