CN113523127A

CN113523127A - Pipe reducing machine for machining buckling and locking pipe at end of scaffold pipe in constructional engineering

Info

Publication number: CN113523127A
Application number: CN202110788818.4A
Authority: CN
Inventors: 方鑫
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2021-10-22

Abstract

The invention relates to the technical field of constructional engineering equipment, in particular to a pipe reducing machine for machining a buckling and locking pipe at the end part of a scaffold pipe in constructional engineering, which comprises a support box, a pipe reducing machine, a servo motor, a control assembly and a control center, wherein a feeding assembly is connected above the support box, the feeding assembly comprises a driving assembly, the front side of the driving assembly is connected with the control assembly, a limiting assembly is arranged behind the driving assembly, a first clamp holder is arranged above the driving assembly, a second clamp holder is arranged on the left side of the first clamp holder, the pipe reducing machine is arranged on the left side of the feeding assembly, and the supporting assembly is arranged on the left side of the pipe reducing machine. According to the invention, through the arrangement of the feeding component, the automatic feeding of the pipe can be realized, the feeding depth of each time can be effectively ensured, the processing precision of the pipe is ensured, and meanwhile, the extrusion and sinking of the pipe are avoided through the supporting component.

Description

Pipe reducing machine for machining buckling and locking pipe at end of scaffold pipe in constructional engineering

Technical Field

The invention relates to the technical field of constructional engineering equipment, in particular to a pipe reducing machine for machining a buckling and locking pipe at the end part of a scaffold pipe in constructional engineering.

Background

The pipe reducing machine is a hydraulic full-automatic pipe end processing machine controlled by an integrated control touch display screen, pipe end processing forming such as pipe expanding, pipe reducing, bulging, rib upsetting and the like can be performed on a pipe by replacing a die, and a manual, inching or automatic processing machine tool can be freely determined according to user needs to be composed of main parts such as an oil tank, a machine body, a sliding block, a main oil cylinder, a die core rod (selected), a limiting oil cylinder, a pressing oil cylinder, a clamping die, an axial positioning oil cylinder and an axial positioning angle iron.

However, when the existing pipe reducing machine is used, because the processed pipeline needs to be manually operated and inserted, and then the length of the pipe of the processed pipeline is not controllable, thereby the length of the pipe part after the pipe is contracted is too long or too short, the normal butt joint use of the pipe is influenced, meanwhile, the end part of the processed pipe can be in a concave state due to external collision, and further when the pipe contracting of the end part of the pipe is processed, the concave part is in the process of pipe contracting, the mop of the pipe can be more obviously concave, the normal pipe contracting work of the pipe is influenced, the pipe contracting precision is influenced, and the butt joint precision of the processed pipe is influenced.

Disclosure of Invention

The invention aims to provide a pipe reducing machine for machining a buckling and locking pipe at the end part of a scaffold pipe in building engineering, which aims to solve the problem that the feeding depth of the pipe cannot be controlled and adjusted when the pipe is machined and fed in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a building engineering scaffold puts up tubular product tip withhold lock pipe processing and uses draw machine, includes supporting box, draw ware, servo motor, control assembly and control center, the top of supporting box is connected with the pay-off subassembly, the pay-off subassembly includes drive assembly, drive assembly's front is connected with control assembly, drive assembly's rear is provided with spacing subassembly, drive assembly's top is provided with first holder, the left side of first holder is provided with the second holder, the left side of pay-off subassembly is provided with the draw ware, the left side of draw ware is provided with supporting component, the rear of draw ware is provided with control center.

Preferably, the drive assembly includes the protecting crust, the inside of protecting crust is provided with the lead screw, the right side of lead screw is connected with belt pulley drive mechanism, belt pulley drive mechanism's below is connected with servo motor, both ends all are provided with the guide bar around the lead screw, the top of protecting crust is connected with the roof, the lead screw has the removal subassembly with the external connection of guide bar.

Preferably, servo motor passes through the fixed bolster and connects in the inside of supporting box, servo motor's output is connected with ball bearing, and servo motor's output is connected with the lead screw through belt pulley drive mechanism, both ends all are provided with ball bearing about the lead screw, and ball bearing is in the inside of protecting crust, logical groove has been seted up at the top of roof.

Preferably, the outer portion of the screw rod is connected with a nut pair, the screw rod is connected with the nut pair in a meshed mode, the outer portion of the guide rod is connected with a guide lantern ring, and the guide rod is connected with the guide lantern ring in a sliding mode.

Preferably, the movable assembly comprises a nut pair, a guide sliding block is connected to the top of the nut pair, guide lantern rings are connected to the front end and the rear end of the guide sliding block, a movable plate is connected to the top of the guide sliding block, a connecting column is arranged on the rear side of the guide sliding block and connected to the rear of the guide lantern rings, the guide sliding block is of an I-shaped structure and is arranged inside a through groove of a top plate, the movable plate is provided with two parts, and the structure of the lower part of the guide sliding block is the same.

Preferably, the control assembly includes the spacing groove, the top in spacing groove is connected with the removal post, the top of removing the post is connected with the inductor, the right side of inductor is connected with the sensor, and the sensor is connected in the front of second holder, the bottom of removing the post is sliding connection with the spacing groove, and the inside of spacing groove is provided with the rubber pad.

Preferably, the movable plates are fixedly connected below the first holder and the second holder, the first holder is positioned at the right side of the second holder, and the first holder, the second holder and the pipe reducing device are positioned at the same axial lead.

Preferably, the limiting assembly comprises a protective sleeve, a rack is arranged below the protective sleeve, a gear is arranged behind the rack, a first rotating shaft is connected to the center of the gear, a first conical tooth is connected to the top of the first rotating shaft, bearing sleeves are connected to the upper end and the lower end of the first rotating shaft, a second conical tooth is connected to the outer portion of the first conical tooth, a second rotating shaft is connected to the center of the second conical tooth, and a baffle is connected to the outer portion of the second rotating shaft.

Preferably, rack connection is at the rear of spliced pole, the rack is the meshing with the gear and is connected, the inner wall at the lag is connected to the bearing housing, and the lag is the rotation through bearing housing and first axis of rotation and is connected, first toper tooth is the meshing with the connected mode of second toper tooth and is connected, both ends all are connected with ball bearing about the second axis of rotation, and ball bearing is in the inside of lag, the baffle is in the left side of second holder.

Preferably, the supporting component includes the support ring, the left side of support ring is connected with the cylinder, the right side of support ring is connected with the receiver, the internal connection of receiver has interior pole, the external connection of interior pole has the activity lantern ring, the outside of interior pole is provided with the urceolus, the external connection of urceolus has the fixed lantern ring, the external connection of the fixed lantern ring and the activity lantern ring has alternately movable rod, the external connection of alternately movable rod has the backup pad, the spout has been seted up to the top of backup pad, logical groove has been seted up to the outside of urceolus, and the internal connection who leads to the groove has the activity lantern ring, the left side of interior pole is connected with the jacking end of cylinder.

Compared with the prior art, the invention has the beneficial effects that:

1. this pipe reducing machine is used in processing of building engineering scaffold frame tubular product tip withholding lock pipe can realize the autoloading to tubular product through the setting of pay-off subassembly, and can effectually realize controlling the feed degree of depth of tubular product when carrying out the tubular product pay-off again to the realization is controlled the draw degree of depth after the tubular product processing, guarantees the accuracy of the draw degree of depth, thereby improves the butt joint precision of tubular product after the draw, improves the processing availability factor of tubular product.

2. This pipe reducing machine is used in processing of building engineering scaffold frame tubular product tip withhold lock pipe can realize carrying out auxiliary stay to sunken pipeline through supporting component's setting, can pass through the setting of this structure, before tubular product carries out the draw, support the processing to the pipeline tip in advance, and then avoid the tip of tubular product to appear excessive sunken state, and then add man-hour in the draw that carries out tubular product, can pass through this strutting arrangement's setting, realize the preliminary reset to sunken tubular product, guarantee the shape and the precision of draw, avoid aggravating the tubular product tip and appear sunkenly.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

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

FIG. 3 is a schematic view of the overall structure of the control center according to the present invention;

FIG. 4 is a schematic view of the overall structure of the pipe contracting assembly of the present invention;

FIG. 5 is a schematic view of the overall structure of the feeding assembly of the present invention;

FIG. 6 is a rear view of the feed assembly of the present invention;

FIG. 7 is a schematic diagram of the right-view overall structure of the feeding assembly of the present invention;

FIG. 8 is a front view of the driving assembly of the present invention;

FIG. 9 is a front view of the overall structure of the moving assembly of the present invention;

FIG. 10 is a schematic view of the overall structure of the stop assembly of the present invention;

FIG. 11 is an enlarged view of the structure A of FIG. 10 according to the present invention;

fig. 12 is a front sectional view of the support assembly of the present invention.

In the figure: 1. a support box; 2. a feeding assembly; 21. a drive assembly; 211. a protective shell; 212. a servo motor; 213. a belt pulley transmission mechanism; 214. a lead screw; 215. a guide bar; 216. a top plate; 217. a moving assembly; 2171. a nut pair; 2172. a guide collar; 2173. a guide slider; 2174. a movable plate; 2175. connecting columns; 22. a control component; 221. a limiting groove; 222. moving the column; 223. an inductor; 224. a sensor; 23. a first gripper; 24. a second gripper; 25. a limiting component; 251. a protective sleeve; 252. a rack; 253. a gear; 254. a first rotating shaft; 255. a bearing housing; 256. a first conical tooth; 257. a second tapered tooth; 258. a second rotating shaft; 259. a baffle plate; 3. a pipe reducing device; 4. a support assembly; 41. a support ring; 42. a cylinder; 43. a storage cylinder; 44. an inner rod; 45. a movable collar; 46. a cross movable bar; 47. a fixed collar; 48. a support plate; 49. an outer cylinder; 5. and a control center.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-12, an embodiment of the present invention is shown:

a pipe reducing machine for buckling, pressing and locking a pipe at the end part of a scaffold pipe in building engineering comprises a support box 1, a pipe reducing device 3, a servo motor 212, a control component 22 and a control center 5, wherein a feeding component 2 is connected above the support box 1, the feeding component 2 comprises a driving component 21, the front side of the driving component 21 is connected with the control component 22, a limiting component 25 is arranged behind the driving component 21, a first clamp holder 23 is arranged above the driving component 21, a second clamp holder 24 is arranged on the left side of the first clamp holder 23, through the arrangement of the structure, the auxiliary feeding use of the pipe can be realized, the feeding depth of the pipe at each time is ensured, the depth of a pipe reducing part is ensured, the pipe reducing device 3 is arranged on the left side of the feeding component 2 and used for reducing the pipe, a support component 4 is arranged on the left side of the pipe reducing device 3 and used for the auxiliary support inside the pipe, and the deepening of the pipe is avoided, and a control center 5 is arranged behind the pipe reducer 3 and used for controlling the circuit of the equipment.

Further, drive assembly 21 includes protecting crust 211, the inside of protecting crust 211 is provided with lead screw 214, the right side of lead screw 214 is connected with belt pulley drive 213, belt pulley drive 213's below is connected with servo motor 212, both ends all are provided with guide bar 215 around lead screw 214, the top of protecting crust 211 is connected with roof 216, lead screw 214 and guide bar 215's external connection have removal subassembly 217, setting up through this structure can drive belt pulley drive 213 when servo motor 212 starts and rotate, further can drive lead screw 214 and rotate, can drive first holder 23 and second holder 24 through removing subassembly 217 when lead screw 214 rotates and remove, and then realize the transport to tubular product.

Further, servo motor 212 passes through the fixed bolster and connects in the inside of supporting box 1, servo motor 212's output is connected with ball bearing, and servo motor 212's output is connected with lead screw 214 through belt pulley drive 213, both ends all are provided with ball bearing about lead screw 214, and ball bearing is in the inside of protecting crust 211, a frictional force when being used for reducing lead screw 214 and rotating, logical groove has been seted up at the top of roof 216, be convenient for first holder 23 and second holder 24's removal to be connected, and then through the setting of direction slider 2173 and fly leaf 2174, realize the removal processing to first holder 23 and second holder 24.

Further, a nut pair 2171 is connected to the outside of the lead screw 214, the lead screw 214 is connected with the nut pair 2171 in a meshing manner, a guide collar 2172 is connected to the outside of the guide rod 215, and the guide rod 215 is connected with the guide collar 2172 in a sliding manner, so that the nut pair 2171 can move by rotation of the lead screw 214, thereby realizing movement of parts above the nut pair 2171, finally realizing movement of the first clamp 23 and the second clamp 24, and sliding of the guide rod 215 and the guide collar 2172 can play a certain guiding role, thereby effectively ensuring the smoothness of movement of the movable plate 2174.

Further, the moving assembly 217 comprises a nut pair 2171, a guide slider 2173 is connected to the top of the nut pair 2171, guide collars 2172 are connected to both front and rear ends of the guide slider 2173, a movable plate 2174 is connected to the top of the guide slider 2173, a connection column 2175 is arranged on the rear side of the guide slider 2173, the connection column 2175 is connected to the rear of the guide collar 2172, the guide slider 2173 is in an i-shaped structure and is arranged in the through slot of the top plate 216, two movable plates 2174 are arranged, and the lower structure is the same, by the arrangement of the structure, the moving support of the first holder 23 and the second holder 24 can be effectively realized, by the meshing connection of the nut pair 2171 and the lead screw 214, the moving drive of the nut pair 2171 can be realized, the moving of the nut pair 2171 and the moving of the upper movable plate 2174 are further realized, and the auxiliary guide of the moving of the movable plate 2174 is realized by the guide collar 2172, while simultaneously moving the rack 252 through the connecting post 2175.

Further, the control assembly 22 includes a limiting groove 221, a moving column 222 is connected above the limiting groove 221, an inductor 223 is connected to the top of the moving column 222, a sensor 224 is connected to the right side of the inductor 223, the sensor 224 is connected to the front side of the second holder 24, the bottom of the moving column 222 is in sliding connection with the limiting groove 221, and a rubber pad is arranged inside the limiting groove 221, by the arrangement of the structure, the depth of the pipe material can be controlled, by the contact control of the sensor 223 and the sensor 224, the driving control of the servo motor 212 is realized, further the control of the feeding depth of the pipe material can be realized, by adjusting the position of the moving column 222 in the limiting groove 221, the distance from the sensor 224 to the inductor 223 is adjusted, further the distance adjustment of the feeding depth of the pipe material is realized, and the progress processing of the pipe materials with different processing depths is facilitated, when the sensor 223 contacts the sensor 224, the controller can control the servo motor 212, at this time, the servo motor 212 stops working, the pipe reducer 3 realizes the reverse driving of the servo motor 212 after the pipe is reduced, and the processed pipe can be taken out and returned to the initial position.

Further, the movable plates 2174 are fixedly connected below the first holder 23 and the second holder 24, the first holder 23 is located on the right side of the second holder 24, and the first holder 23, the second holder 24 and the pipe reducing device 3 are located on the same axial line, so that the coaxiality of pipe feeding can be ensured, the processing precision of pipe processing is ensured, and the phenomenon that the pipe processing is sunken due to axial deviation is avoided.

Further, spacing subassembly 25 includes lag 251, the inside below of lag 251 is provided with rack 252, the rear of rack 252 is provided with gear 253, the center of gear 253 is connected with first axis of rotation 254, the top of first axis of rotation 254 is connected with first toper tooth 256, the upper and lower both ends of first axis of rotation 254 all are connected with bearing housing 255, the external connection of first toper tooth 256 has second toper tooth 257, the center of second toper tooth 257 is connected with second axis of rotation 258, the external connection of second axis of rotation 258 has baffle 259, through the setting of this structure, can realize assisting spacingly to the tubular product of pre-fastening, the length that the tubular product of guaranteeing centre gripping stretches out is fixed every time, and then the setting of cooperation control assembly 22, can be when the feeding of tubular product is carried, can effectually realize the control to the depth of processing of tubular product, guarantee the draw length of tubular product.

Further, the rack 252 is connected to the rear of the connecting column 2175, the rack 252 is connected with the gear 253 in a meshing manner, the bearing sleeve 255 is connected to the inner wall of the protective sleeve 251, the protective sleeve 251 is rotatably connected with the first rotating shaft 254 through the bearing sleeve 255, the first tapered teeth 256 are connected with the second tapered teeth 257 in a meshing manner, the left end and the right end of the second rotating shaft 258 are both connected with ball bearings, the ball bearings are located inside the protective sleeve 251, the baffle 259 is located on the left side of the second holder 24, the rack 252 can be driven to move through the movement of the connecting column 2175, the gear 253 can be driven to rotate through the movement of the rack 252, the rotation of the first rotating shaft 254 can be realized, the first tapered teeth 256 can be driven to rotate while the first rotating shaft 254 rotates, the second tapered teeth 257 can be driven to rotate through the rotation of the first tapered teeth 256, thereby rotation through second toper tooth 257 drives second axis of rotation 258 and rotates, can drive baffle 259 when second axis of rotation 258 rotates and reverse to when tubular product carries, can realize the reversal of baffle 259, the transport of the tubular product of being convenient for, under the initial condition, can realize guaranteeing the length position of tubular product to the spacing separation of tubular product.

Further, the support assembly 4 comprises a support ring 41, a cylinder 42 is connected to the left side of the support ring 41, a storage barrel 43 is connected to the right side of the support ring 41, an inner rod 44 is connected inside the storage barrel 43, a movable sleeve ring 45 is connected outside the inner rod 44, an outer cylinder 49 is arranged outside the inner rod 44, a fixed sleeve ring 47 is connected outside the outer cylinder 49, a cross movable rod 46 is connected outside the fixed sleeve ring 47 and the movable sleeve ring 45, a support plate 48 is connected outside the cross movable rod 46, a sliding groove is formed above the support plate 48, a through groove is formed outside the outer cylinder 49, a movable sleeve ring 45 is connected inside the through groove, a jacking end of the cylinder 42 is connected to the left side of the inner rod 44, through the arrangement of the structure, auxiliary support can be performed to the end of a pipe, auxiliary limit support to the end of a sunken pipe can be realized, through jacking of the jacking end of the cylinder 42, fixed lift to the movable sleeve ring 45 can be realized, and then the scissors through crossing movable rod 46 realize the extension to backup pad 48 to the realization is to the support of tubular product inner wall, avoids when carrying out the draw of tubular product, and it is more obvious to lead to original sunken position, thereby influences the diameter size of draw tubular product tip, influences the machining precision.

The working principle is as follows: when the pipe clamping device is used, firstly, a processed building scaffold pipe is placed in the first clamping device 23 and the second clamping device 24, one end of the pipe is abutted against the baffle 259, the pipe is clamped and fixed by the first clamping device 23 and the second clamping device 24, the pipe is fed by the button, before feeding, the position of the inductor 223 is adjusted, the position of the limiting groove 221 is moved by manually sliding the movable column 222, the position of the inductor 223 can be adjusted, and therefore the pipe contraction depth of the pipe is adjusted.

Further, the servo motor 212 works, the belt pulley transmission mechanism 213 can drive the screw 214 to rotate, the screw 214 can drive the movable plate 2174 and the connecting column 2175 to move through the nut pair 2171 while rotating, the nut pair 2171 can drive the first holder 23 and the second holder 24 to move while moving, the connecting column 2175 can drive the rack 252 to move while moving, the gear 253 can be driven to rotate by further moving the rack 252, further, the rotation of the first rotating shaft 254 can be realized, the first rotating shaft 254 can drive the first tapered tooth 256 to rotate while rotating, the second tapered tooth 257 can be driven to rotate by further rotating the first tapered tooth 256, the second rotating shaft 258 can be driven to rotate by rotating the second tapered tooth 257, the baffle 259 can be driven to rotate while rotating the second rotating shaft 258, therefore, the pipe can pass through the conveying device while being conveyed.

When tubular product is on the way of carrying, when sensor 224 contacts with inductor 223, can realize the control to servo motor 212, and then realize servo motor 212 stall, simultaneously through pipe reducer 3 to the tubular product processing back, can carry out reversal control to servo motor 212 through the controller, and then take out the tubular product after processing the back, put into new tubular product of treating processing in the inside of first holder 23 and second holder 24, circulate in proper order, realize the draw processing to tubular product, and the device is when carrying out the draw of tubular product, can effectually realize unifying the regulation to the draw depth of pipe of tubular product, guarantee the unity of the draw depth of tubular product, guarantee the precision of later stage butt joint.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a building engineering scaffold frame tubular product tip withholds lock pipe processing and uses draw machine, includes supporting box (1), draw machine (3), servo motor (212), control assembly (22) and control center (5), its characterized in that: the top of prop up case (1) is connected with feeding assembly (2), feeding assembly (2) include drive assembly (21), the front of drive assembly (21) is connected with control assembly (22), the rear of drive assembly (21) is provided with spacing subassembly (25), the top of drive assembly (21) is provided with first holder (23), the left side of first holder (23) is provided with second holder (24), the left side of feeding assembly (2) is provided with pipe reducer (3), the left side of pipe reducer (3) is provided with supporting component (4), the rear of pipe reducer (3) is provided with control center (5).

2. The pipe reducing machine for machining the buckling and locking pipe at the end part of the scaffold pipe in the building engineering according to claim 1, wherein the pipe reducing machine comprises: drive assembly (21) is including protecting crust (211), the inside of protecting crust (211) is provided with lead screw (214), the right side of lead screw (214) is connected with belt pulley drive mechanism (213), the below of belt pulley drive mechanism (213) is connected with servo motor (212), both ends all are provided with guide bar (215) around lead screw (214), the top of protecting crust (211) is connected with roof (216), the external connection of lead screw (214) and guide bar (215) has removal subassembly (217).

3. The pipe reducing machine for machining the buckling and locking pipe at the end part of the scaffold pipe in the building engineering according to claim 2, wherein the pipe reducing machine comprises: servo motor (212) are connected in the inside of supporting box (1) through fixed bolster, the output of servo motor (212) is connected with ball bearing, and the output of servo motor (212) is connected with lead screw (214) through belt pulley drive mechanism (213), both ends all are provided with ball bearing about lead screw (214), and ball bearing is in the inside of protecting crust (211), logical groove has been seted up at the top of roof (216).

4. The pipe reducing machine for machining the buckling and locking pipe at the end part of the scaffold pipe in the building engineering according to claim 2, wherein the pipe reducing machine comprises: the outer portion of the lead screw (214) is connected with a nut pair (2171), the lead screw (214) is connected with the nut pair (2171) in a meshed mode, the outer portion of the guide rod (215) is connected with a guide lantern ring (2172), and the guide rod (215) is connected with the guide lantern ring (2172) in a sliding mode.

5. The pipe reducing machine for machining the buckling and locking pipe at the end part of the scaffold pipe in the building engineering according to claim 2, wherein the pipe reducing machine comprises: the moving assembly (217) comprises a nut pair (2171), a guide slider (2173) is connected to the top of the nut pair (2171), guide lantern rings (2172) are connected to the front end and the rear end of the guide slider (2173), a movable plate (2174) is connected to the top of the guide slider (2173), a connecting column (2175) is arranged on the rear side of the guide slider (2173), the connecting column (2175) is connected to the rear of the guide lantern rings (2172), the guide slider (2173) is of an I-shaped structure and is arranged in a through groove of a top plate (216), two movable plates (2174) are arranged, and the lower structures are the same.

6. The pipe reducing machine for machining the buckling and locking pipe at the end part of the scaffold pipe in the building engineering according to claim 1, wherein the pipe reducing machine comprises: control assembly (22) includes spacing groove (221), the top of spacing groove (221) is connected with removes post (222), the top of removing post (222) is connected with inductor (223), the right side of inductor (223) is connected with sensor (224), and sensor (224) connect the front at second holder (24), the bottom of removing post (222) is sliding connection with spacing groove (221), and the inside of spacing groove (221) is provided with the rubber pad.

7. The pipe reducing machine for machining the buckling and locking pipe at the end part of the scaffold pipe in the building engineering according to claim 1, wherein the pipe reducing machine comprises: the movable plates (2174) are fixedly connected below the first holder (23) and the second holder (24), the first holder (23) is positioned at the right side of the second holder (24), and the first holder (23), the second holder (24) and the tube reducer (3) are positioned at the same axial lead.

8. The pipe reducing machine for machining the buckling and locking pipe at the end part of the scaffold pipe in the building engineering according to claim 1, wherein the pipe reducing machine comprises: the limiting assembly (25) comprises a protecting sleeve (251), a rack (252) is arranged below the interior of the protecting sleeve (251), a gear (253) is arranged behind the rack (252), a first rotating shaft (254) is connected to the center of the gear (253), first conical teeth (256) are connected to the top of the first rotating shaft (254), bearing sleeves (255) are connected to the upper end and the lower end of the first rotating shaft (254), second conical teeth (257) are connected to the exterior of the first conical teeth (256), a second rotating shaft (258) is connected to the center of the second conical teeth (257), and a baffle (259) is connected to the exterior of the second rotating shaft (258).

9. The pipe reducing machine for machining the buckling and locking pipe at the end part of the scaffold pipe in the building engineering according to claim 8, wherein the pipe reducing machine comprises: the gear rack (252) is connected to the rear of the connecting column (2175), the gear rack (252) is in meshed connection with the gear (253), the bearing sleeve (255) is connected to the inner wall of the protecting sleeve (251), the protecting sleeve (251) is in rotary connection with the first rotating shaft (254) through the bearing sleeve (255), the first conical teeth (256) are in meshed connection with the second conical teeth (257), the left end and the right end of the second rotating shaft (258) are both connected with ball bearings, the ball bearings are located inside the protecting sleeve (251), and the baffle (259) is located on the left side of the second holder (24).

10. The pipe reducing machine for machining the buckling and locking pipe at the end part of the scaffold pipe in the building engineering according to claim 1, wherein the pipe reducing machine comprises: the support assembly (4) comprises a support ring (41), the left side of the support ring (41) is connected with a cylinder (42), the right side of the support ring (41) is connected with a receiving cylinder (43), the interior of the receiving cylinder (43) is connected with an inner rod (44), the outer part of the inner rod (44) is connected with a movable lantern ring (45), the outer part of the inner rod (44) is provided with an outer cylinder (49), the outer part of the outer cylinder (49) is connected with a fixed lantern ring (47), the outer parts of the fixed lantern ring (47) and the movable lantern ring (45) are connected with a cross movable rod (46), a supporting plate (48) is connected to the outside of the cross movable rod (46), a sliding groove is arranged above the supporting plate (48), a through groove is arranged on the outside of the outer cylinder (49), and the inside of the through groove is connected with a movable lantern ring (45), and the left side of the inner rod (44) is connected with the jacking end of the air cylinder (42).