A seamless steel pipe cutting apparatus and a cutting method thereof

Abstract

The application belongs to the technical field of seamless steel pipe processing, and discloses a seamless steel pipe cutting device and a cutting method thereof, which comprises a placing rack, a cutting assembly, a clamping and positioning assembly and a seamless steel pipe, and the front end of the placing rack is provided with a moving assembly. The application can maintain cutting stability at the stress concentration position at the top of the seamless steel pipe during cutting by the cutting assembly, and can adapt to the change of the cutting position at the top of the seamless steel pipe by rotating the winding wheels on both sides through the rotating assembly, and by reversely rotating the installation frame with the steel rope winding left and right symmetrically, so that the cutting stability can be maintained during the cutting process of the arc-shaped pipe wall at the top of the seamless steel pipe, and the deformation can be avoided. After the cutting at the stress concentration position at the top is completed, the cutting assembly is stopped and the support block continues to deflect, so that the two support blocks can be completely opened and placed below the cutting assembly, and the cutting process can be facilitated and the subsequent cutting process can be avoided, and the cutting quality of the seamless steel pipe is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of seamless steel pipe processing, and particularly relates to a seamless steel pipe cutting device and a cutting method thereof. BACKGROUND

[0002] A seamless steel pipe, also known as a seamless pipe, is a steel pipe made through processes such as heating, piercing, rolling, and cooling of a blank. Compared with a welded steel pipe, a seamless steel pipe has the characteristic of no weld, and its internal structure is more uniform, with higher tensile strength and pressure resistance. A seamless steel pipe is made of high-quality carbon steel, alloy steel, or stainless steel, and is widely used in the fields of petroleum, chemical industry, natural gas, power, shipbuilding, and machinery manufacturing. According to different uses and requirements, a seamless steel pipe can be made of different materials and specifications, and a cutting device is usually used for cutting during seamless steel pipe processing.

[0003] In the prior art, for a thin-walled seamless steel pipe with a diameter, when it is transported to a cutting position and cut downward by a steel saw blade, the force area is relatively large during the actual cutting process, and the downward pressure value is high during the cutting process, which causes more stress concentration around the pipe opening and increases the risk of pipe opening deformation. Especially for thin-walled seamless steel pipe cutting, the heat generated during the cutting process, combined with the downward pressure, causes a large compressive deformation of the seamless steel pipe at the first cutting position at the top, greatly reducing the cutting quality of the seamless steel pipe, and the yield rate during the actual cutting process is low, and the use effect is not good.

[0004] In addition, in the prior art, during pipe body cutting, a cutting fluid spraying mechanism is arranged in the cutting assembly, and the cutting debris generated during the cutting process leaks and mixes with the sprayed cutting fluid in the inner wall bottom of the seamless steel pipe. After complete cutting, after the target seamless steel pipe is transferred after cutting, internal cleaning is usually required. However, for a large-diameter seamless steel pipe, the actual volume and mass are large, which on the one hand increases the cleaning process, and on the other hand, the actual cleaning difficulty is large, and the use effect is not good. SUMMARY

[0005] The present application aims to provide a seamless steel pipe cutting device and a cutting method thereof to solve the problems raised in the background.

[0006] In order to achieve the above object, the present application provides the following technical scheme: A seamless pipe cutting device and a pipe cutting method thereof, comprising a placing rack, a cutting assembly, a clamping and positioning assembly and a seamless pipe, the front end of the placing rack is provided with a moving assembly, the top of the moving assembly is provided with a curved rod, the outer surface of the curved rod is respectively sleeved with a first ring and a second ring, the top end of the first ring and the second ring is fixedly connected with a connecting block, the top surface of the connecting block is fixedly connected with a mounting frame, the inside of the mounting frame is fixedly provided with a first electric push rod, the inside of the mounting frame is movably sleeved with a movable frame, the movable end of the first electric push rod is fixedly connected with the movable frame, the outer end of the movable frame is fixedly connected with a supporting block, the number of the supporting blocks is four and each two is a group, the mounting frame is divided into left and right two groups, the number of the mounting frame is two, the two mounting frames are fixedly connected with a spring, the bottom of the curved rod is fixedly provided with a rotating assembly, the outer surface of the curved rod is fixedly sleeved with a guide assembly, the lower part of the guide assembly is fixedly connected with a supporting seat, the inside of the supporting seat is rotatably sleeved with a rotating shaft, the outer surface of the rotating shaft is fixedly sleeved with a first gear, the first gear is meshingly connected with the rotating assembly, one end of the rotating shaft is fixedly provided with a winding wheel, the outer surface of the winding wheel is wound with a steel rope, one end of the steel rope is fixedly connected on the side surface of the mounting frame.

[0007] Preferably, the outer surface of the curved rod is provided with a first ring groove, the inner surface of the first ring groove is rotatably sleeved with the first ring and the second ring, the number of the second ring is two and is symmetrically distributed on the two sides of the first ring.

[0008] Preferably, the top surface of the supporting block is arc-shaped and is adapted to the inner wall of the seamless pipe, the supporting blocks in each group are symmetrically distributed and have a gap, and the two mounting frames are symmetrically distributed on the top of the curved rod.

[0009] Preferably, the rotating assembly comprises a motor base, a motor and a second gear, the motor base is fixedly connected at the bottom of the curved rod, the motor is fixedly installed in the inside of the motor base, the second gear is fixedly sleeved on the output shaft of the motor, the second gear is meshingly connected with the first gear, the number of the first gear is two and is symmetrically distributed on the two sides of the second gear.

[0010] Preferably, the guide assembly comprises a fixed ring, a guide ring and a guide hole, the fixed ring is fixedly sleeved on the outer surface of the curved rod and is symmetrically distributed on the two sides of the first ring groove, the guide ring is a semicircular ring, the guide ring is fixedly connected between the two fixed rings, the guide hole is provided on the top end surface of the guide ring, and the inner surface of the guide ring is movably sleeved with the steel rope.

[0011] Preferably, one end of the curved rod is provided with a mounting cavity, the inside of the curved rod is provided with a communication cavity, the communication cavity is communicated with the mounting cavity, the top of the curved rod is fixedly provided with an air pump, the side of the air pump is fixedly communicated with an air pipe, the air outlet end of the air pipe is fixedly sleeved on the top of the curved rod and communicated with the communication cavity, the inside of the curved rod is provided with a No. 2 ring groove, the No. 2 ring groove is located outside the mounting cavity and communicated with the mounting cavity, and the inner surface of the mounting cavity is rotatably provided with a flushing assembly.

[0012] Preferably, the flushing assembly comprises a rotating sleeve, a through hole, a fixed rod, a fan blade, a curved pipe and a snap ring, the rotating sleeve is rotatably sleeved in the mounting cavity, the snap ring is fixedly sleeved on the outer surface of the rotating sleeve, the snap ring is rotatably sleeved in the No. 2 ring groove, the through hole is formed in the end surface of the rotating sleeve, the fixed rod is fixedly connected to the inner surface of the rotating sleeve, the fan blade is fixedly sleeved on the outer surface of the fixed rod, the fan blade is located in the communication cavity, and the curved pipe is annularly distributed on the outer end surface of the rotating sleeve and communicated with the through hole.

[0013] Preferably, the moving assembly comprises a fixed track frame, a No. 2 electric push rod and a movable plate, the fixed track frame is fixedly installed on the outer side surface of the front end of the placing rack, the No. 2 electric push rod is fixedly installed in the inside of the fixed track frame, the movable plate is slidably sleeved in the inside of the fixed track frame and fixedly connected with the No. 2 electric push rod, and the top surface of the movable plate is fixedly connected with the curved rod.

[0014] Preferably, the cutting assembly is liftable and installed on the placing rack, the clamping and positioning assembly is fixedly installed on both sides of the placing rack, the seamless steel pipe is arranged on the top of the placing rack, and the cutting assembly is located above the seamless steel pipe.

[0015] A seamless steel pipe cutting device and a cutting method thereof, comprising the following cutting steps:

[0016] First step: placing the seamless steel pipe on the top of the placing rack and moving to the target position, starting the clamping and positioning assembly to clamp the seamless steel pipe, and starting the moving assembly to make the moving assembly drive the curved rod and the support block at one end of the curved rod to be sleeved on the front end of the seamless steel pipe;

[0017] Second step: keeping two support blocks in each group of support blocks distributed on both sides of the to-be-cut position, starting the No. 1 electric push rod in the two groups of mounting frames to push the movable frame to move along the inside of the mounting frame and drive the support block to contact the upper side of the inner wall of the seamless steel pipe, and starting the cutting assembly to cut the top;

[0018] Third step: as the cutting assembly cuts the top and continues to cut down, the two sides of the cutting position of the outer surface of the seamless steel pipe move down along the circumference of the outer side of the seamless steel pipe, the rotating assembly is started to rotate, the two sides of the rotating shaft drive the winding wheels to rotate in the support seat, the two sides of the winding wheels rotate and wind the steel ropes at the same time, the two groups of installation frames swing down along the guide assembly, as the spring is stretched, the two groups of installation frames drive the two groups of support blocks to swing along with the downward movement of the cutting assembly, the support blocks move along the cutting position of the outer surface of the seamless steel pipe;

[0019] Fourth step: when the cutting assembly completes the cutting of a part of the top of the seamless steel pipe, the cutting assembly is maintained to stop, the rotating assembly continues to pull the two sides of the installation frame to open completely, and the moving assembly is started to move the two groups of support blocks from below the cutting assembly, and the cutting assembly is continued to be started to complete the overall cutting;

[0020] Fifth step: after the cutting is completed and the cutting assembly is reset, the air pump is started, the air pump is started and high-pressure gas is introduced into the communication cavity through the air pipe, the fan blades in the flushing assembly are rotated in the communication cavity, the flushing assembly is rotated, the introduced gas is sprayed out through the through hole and along the curved pipe, the curved pipe is rotated and flushed inside the cut seamless steel pipe, as the moving assembly is started to drive the curved rod to move from inside to outside, the cutting fluid and waste in the seamless steel pipe are flushed out pneumatically;

[0021] Sixth step: after the blowing is completed, the moving assembly drives the curved rod away from the cut seamless steel pipe, the support roller in the placing rack rotates, and the cut seamless steel pipe is pushed out forward.

[0022] The beneficial effects of the present application are as follows:

[0023] 1. The application realizes the movement of the curved rod through the moving assembly. After the positioning and clamping of the seamless steel pipe, the end of the curved rod is sleeved in the inside of the seamless steel pipe through the moving assembly, and the left and right two groups of supporting blocks are synchronously moved and tightly pressed on the top of the inner wall of the seamless steel pipe through the cooperation of the No. 1 electric push rod. The positions of the two supporting blocks in each group of supporting blocks are cooperated, so that the supporting blocks are symmetrically distributed on both sides of the to-be-cut position with a gap. During the cutting process of the cutting assembly to the top of the seamless steel pipe, the supporting blocks adapt to the cutting position of the seamless steel pipe and support from the inner wall, so as to maintain the cutting stability of the stress concentration position of the top of the seamless steel pipe during the cutting of the cutting assembly, effectively avoid deformation, and cooperate with the rotating assembly to drive the winding wheels on both sides to rotate, and the installation frame with the left and right symmetrically distributed steel rope is reversely rotated, so as to adapt to the position change of the cutting opening during the cutting of the top of the seamless steel pipe. During the cutting process of a section of the arc-shaped pipe wall on the top of the seamless steel pipe, the change of the cutting opening is adapted, the cutting stability is always maintained, deformation is avoided, and after the cutting of the stress concentration position on the top is completed, the cutting assembly is stopped and the supporting block is continuously deflected, so that the two supporting blocks are completely opened and placed below the cutting assembly, and the cutting process is facilitated, the subsequent cutting process is not affected, and the cutting quality of the seamless steel pipe is greatly improved.

[0024] 2. The application reuses the withdrawn supporting blocks, cooperates with the installation frame which is opened by one catty, and moves the supporting blocks to the inside of the to-be-cut part of the seamless steel pipe under the action of the No. 1 electric push rod, so as to realize clamping and fixing from the inside by the supporting blocks. When the cutting of the pipe is carried out to the tail end, the to-be-cut part of the seamless steel pipe is prevented from being twisted left and right under the action of the cutting pressure at the cutting position, the to-be-cut part is stably clamped by the supporting blocks, the cutting stability is further improved, and the cutting quality of the pipe is ensured.

[0025] 3. After the cutting of the pipe is completed, the air pump is started, the supporting block is clamped, the curved rod is moved transversely by the moving assembly, the end of the curved rod in the inside of the seamless steel pipe is moved outward from the cutting position, and at the same time, the high-pressure air provided by the air pump is utilized to rotate the fan blade and rotate the flushing assembly, and the curved pipe is utilized to blow out the gas. In the moving process of the curved rod, the inner wall of the seamless steel pipe is blown outward from the inside, the cutting fluid and debris accumulated in the inside of the seamless steel pipe in the cutting process are blown out together, the actual cleaning efficiency is greatly improved, the cleaning is simple and efficient, and the use effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural schematic view of the application;

[0027] Figure 2 It is a connection schematic view of the curved rod and the moving assembly of the application;

[0028] Figure 3 It is an installation schematic view of the curved rod and the rotating assembly of the application;

[0029] Figure 4 is a cross-sectional view of the curved rod and the flushing assembly of the present application;

[0030] Figure 5 is an exploded view of the first ring and the second ring of the present application;

[0031] Figure 6 is a cross-sectional view of the mounting frame of the present application;

[0032] Figure 7 is an engagement view of the rotating assembly and the first gear of the present application;

[0033] Figure 8 is an exploded view of the guiding assembly and the curved rod of the present application;

[0034] Figure 9 is a view of the flushing assembly of the present application;

[0035] Figure 10 is a cross-sectional view of the curved rod of the present application.

[0036] In the figure: 1, a placing rack; 2, a cutting-off assembly; 3, a clamping positioning assembly; 4, a seamless steel pipe; 5, a moving assembly; 51, a fixed track frame; 52, a second electric push rod; 53, a movable plate; 6, a curved rod; 7, a first ring; 8, a second ring; 9, a connecting block; 10, a mounting frame; 11, a supporting block; 12, a spring; 13, a movable rack; 14, a first electric push rod; 15, a rotating assembly; 151, a motor base; 152, a motor; 153, a second gear; 16, a supporting seat; 17, a rotating shaft; 18, a first gear; 19, a winding wheel; 20, a steel rope; 21, a guiding assembly; 211, a fixed ring; 212, a guiding ring; 213, a guiding hole; 22, a first ring groove; 23, a communication cavity; 24, a mounting cavity; 25, a flushing assembly; 251, a rotating sleeve; 252, a through hole; 253, a fixed rod; 254, a fan blade; 255, a curved pipe; 256, a snap ring; 26, a second ring groove; 27, an air pump; 28, an air pipe. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0038] As Figures 1 to 10As shown, the seamless steel pipe cutting equipment and the cutting method thereof are provided, which comprises a placing rack 1, a cutting assembly 2, a clamping positioning assembly 3 and a seamless steel pipe 4, the front end of the placing rack 1 is provided with a moving assembly 5, the top of the moving assembly 5 is installed with a curved rod 6, the outer surface of the curved rod 6 is respectively sleeved with a No. 1 ring 7 and a No. 2 ring 8, the top end of the No. 1 ring 7 and the No. 2 ring 8 is fixedly connected with a connecting block 9, the top surface of the connecting block 9 is fixedly connected with a mounting frame 10, the inside of the mounting frame 10 is fixedly installed with a No. 1 electric push rod 14, the inside of the mounting frame 10 is movably sleeved with a movable frame 13, the movable end of the No. 1 electric push rod 14 is fixedly connected with the movable frame 13, the outer end of the movable frame 13 is fixedly connected with a supporting block 11, the number of the supporting block 11 is four and every two is a group, which is divided into left and right groups, the number of the mounting frame 10 is two, the spring 12 is fixedly connected between the two mounting frames 10, the bottom of the curved rod 6 is fixedly installed with a rotating assembly 15, the outer surface of the curved rod 6 is fixedly sleeved with a guide assembly 21, the lower part of the guide assembly 21 is fixedly connected with a supporting seat 16, the inside of the supporting seat 16 is rotatably sleeved with a rotating shaft 17, the outer surface of the rotating shaft 17 is fixedly sleeved with a No. 1 gear 18, the No. 1 gear 18 is meshingly connected with the rotating assembly 15, one end of the rotating shaft 17 is fixedly installed with a winding wheel 19, the outer surface of the winding wheel 19 is wound with a steel wire 20, one end of the steel wire 20 is fixedly connected on the side surface of the mounting frame 10.

[0039] First embodiment: Place seamless steel pipe 4 on the top of the rack 1 and move to the target position, start the clamping positioning assembly 3 to clamp the seamless steel pipe 4, start the moving assembly 5, so that the No. 2 electric push rod 52 in the moving assembly 5 drives the movable plate 53 to slide along the inside of the fixed rail frame 51, and drives the crank rod 6 and the support block 11 at one end of the crank rod 6 to enter the front end of the seamless steel pipe 4, keep two support blocks 11 in each group of support blocks 11 distributed in front of and behind the cutting position on both sides, start the No. 1 electric push rod 14 in the two groups of mounting frames 10, and push the movable frame 13 to move along the inside of the mounting frame 10, and drive the support block 11 to tilt upward and contact the upper part of the inner wall of the seamless steel pipe 4 for support, start the cutting assembly 2 to cut the top, as the cutting assembly 2 cuts the top and continues to cut downward, the support block 11 always supports at the top cutting position of the cutting assembly 2, the top outer surface of the seamless steel pipe 4 is gradually cut open, and the cutting opening moves downward along the circumference of the seamless steel pipe 4, start the rotating assembly 15, so that the rotating assembly 15 drives the two side meshing No. 1 gear 18 to rotate, and then drives the two side rotating shafts 17 in the support seat 16 to rotate the winding wheel 19, the two side winding wheels 19 rotate at the same time and wind the steel rope 20, so that the two groups of steel ropes simultaneously pull the mounting frame 10 to swing downward along the guide assembly 21, as the spring 12 stretches, the two groups of mounting frames 10 respectively drive the two groups of top support blocks 11 to swing to both sides following the downward movement of the cutting assembly 2, the support blocks 11 follow the movement along the cutting position of the outer surface of the seamless steel pipe 4, when the cutting assembly 2 completes the cutting of a part of the top of the seamless steel pipe 4 downward, maintain the cutting assembly 2 to stop, the rotating assembly 15 continues to pull the two sides of the mounting frame 10 to open completely to both sides, the two groups of support blocks 11 keep below the cutting assembly 2, and start the moving assembly 5 to make the crank rod 6 drive the two groups of support blocks 11 to move out from below the cutting assembly 2, maintain the support blocks 11 to press the inner wall of the seamless steel pipe 4 from the front of the cutting position, continue to start the cutting assembly 2 to complete the overall cutting.

[0040] Firstly, the movement of the curved rod 6 is realized by the moving assembly 5. After the seamless steel pipe 4 is positioned and clamped, the one end of the curved rod 6 is sleeved in the inside of the seamless steel pipe 4 by the moving assembly 5, and the left and right two groups of supporting blocks 11 are synchronously moved and tightly pressed on the top of the inner wall of the seamless steel pipe 4 by cooperating with the No. 1 electric push rod 14. The position of the two supporting blocks 11 in each group of supporting blocks 11 is adjusted so that the supporting blocks 11 are symmetrically distributed on both sides of the cutting position with a gap. During the cutting process of the cutting assembly 2 on the top of the seamless steel pipe 4, the supporting blocks 11 are adapted to the cutting position of the seamless steel pipe 4 to support from the inner wall, so that the cutting stability of the cutting assembly 2 on the stress concentration position of the top of the seamless steel pipe 4 is maintained, the deformation is effectively avoided, and the rotating assembly 15 is driven to rotate the winding wheels 19 on both sides. The installation frame 10 is reversely rotated by cooperating with the winding steel rope 20, the position of the cutting opening is adjusted when the pipe is cut on the top, the cutting stability is always maintained during the cutting process of the top of the seamless steel pipe 4, the deformation is avoided, and after the cutting on the stress concentration position of the top is completed, the cutting assembly 2 is stopped and the supporting blocks 11 are continuously deflected, so that the two supporting blocks 11 are completely opened and placed below the cutting assembly 2, which is convenient for pushing out and avoids affecting the subsequent pipe cutting process. The cutting quality of the seamless steel pipe 4 is greatly improved.

[0041] In addition, by using the withdrawn supporting blocks 11 again, the installation frame 10 is opened by one jin, and the supporting blocks 11 are moved to the inside of the cutting position of the seamless steel pipe 4 under the action of the No. 1 electric push rod 14, and the supporting blocks 11 are clamped and fixed from the inside. When the pipe cutting is carried out to the tail end, the cutting opening part of the seamless steel pipe 4 is prevented from being twisted left and right under the action of the cutting pressure at the cutting position, the cutting stability is further improved by clamping and stabilizing the cutting opening part by the supporting blocks 11, and the pipe cutting quality is ensured.

[0042] The second embodiment is as follows: after the cutting is completed and the cutting assembly 2 is reset upward, the No. 1 electric push rod 14 is reset to contact and press the support, and the one end of the curved rod 6 is pushed forward to the cutting position by the moving assembly 5. The air pump 27 is started, the air pump 27 is started, high-pressure gas is introduced into the communication cavity 23 through the air pipe 28, the fan blade 254 in the flushing assembly 25 is rotated in the communication cavity 23, the flushing assembly 25 is rotated in the installation cavity 24, the gas introduced through the through hole 252 is sprayed along the curved pipe 255, the curved pipe 255 is rotated and flushed in the inside of the cut seamless steel pipe 4, the cutting fluid and waste in the inside of the seamless steel pipe 4 are gradually pneumatically flushed out together with the moving assembly 5, the curved rod 6 is moved away from the cut seamless steel pipe 4 after the blowing and purging are completed, the supporting roller in the placing rack 1 is rotated, and the cut seamless steel pipe 4 is pushed forward and dropped out.

[0043] Firstly, by starting the air pump 27 after cutting the pipe, by driving the curved rod 6 to move laterally with the moving assembly 5, the end of the curved rod 6 inside the seamless steel pipe 4 moves outward from the cut, and at the same time, the high-pressure air provided by the air pump 27 is used to rotate the fan blade 254 while rotating the flushing assembly 25, and the curved curved pipe 255 is used to blow out the gas, and in the process of moving out of the curved rod 6, the inside of the seamless steel pipe 4 is blown outward to blow out the cutting fluid and debris accumulated inside the seamless steel pipe 4 during cutting, greatly improving the actual cleaning efficiency, and the cleaning is simple and efficient, and the use effect is good.

[0044] As shown in Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 and Figure 10 , the outer surface of the curved rod 6 is provided with a No. 1 ring groove 22, the inner surface of the No. 1 ring groove 22 is rotatably connected with the No. 1 ring 7 and the No. 2 ring 8, the No. 2 ring 8 is two in number and symmetrically distributed on both sides of the No. 1 ring 7, the top surfaces of the left and right groups of support blocks 11 are arc-shaped and adapted to the inner wall of the seamless steel pipe 4, each group of support blocks 11 is symmetrically distributed forward and backward with a gap, and the two mounting frames 10 are symmetrically distributed on the top of the curved rod 6.

[0045] In use, the No. 1 ring 7 and the No. 2 ring 8 are allowed to stably rotate and swing by using the No. 1 ring groove 22, and the distribution of the four support blocks 11 is controlled, on the one hand to ensure that the top arc-shaped angle can fully support the seamless steel pipe 4, and on the other hand to adjust the position forward and backward to cooperate with the cutting position, so that the end faces of the two parts cut from the seamless steel pipe 4 have stable support and deformation is avoided.

[0046] As shown in Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 , the rotating assembly 15 includes a motor base 151, a motor 152 and a No. 2 gear 153, the motor base 151 is fixedly connected to the bottom of the curved rod 6, the motor 152 is fixedly installed in the inside of the motor base 151, the No. 2 gear 153 is fixedly sleeved on the output shaft of the motor 152, the No. 2 gear 153 is meshingly connected with the No. 1 gear 18, the No. 1 gear 18 is two in number and symmetrically distributed on both sides of the No. 2 gear 153, the guide assembly 21 includes a fixed ring 211, a guide ring 212 and a guide hole 213, the fixed ring 211 is fixedly sleeved on the outer surface of the curved rod 6 and symmetrically distributed on both sides of the No. 1 ring groove 22, the guide ring 212 is a semicircular ring, the guide ring 212 is fixedly connected between the two fixed rings 211, the guide hole 213 is provided on the top end surface of the guide ring 212, and the inner surface of the guide ring 212 is movably sleeved with the steel wire 20.

[0047] In use, by using the motor 152 in the rotating assembly 15 to provide rotating force, the second gear 153 in the middle drives the first gears 18 on both sides to rotate, and at the same time, the steel ropes 20 are reeled in at the same speed, thereby pulling the two groups of mounting frames 10 from both sides to overcome the elasticity of the springs 12 in the middle to reverse, and through the semicircular guide ring 212 in the guide assembly 21, on the one hand, the guide hole 213 is matched to pull the steel rope 20 to reel down, and on the other hand, the rotation is limited to avoid the mounting frame 10 from reversing downward without limitation, and to ensure that the opening angle of the two groups of mounting frames 10 is sufficient, thereby ensuring that the support blocks 11 on both sides can be located below the cutting assembly 2 when cutting the stress concentration position at the top of the seamless steel pipe 4, facilitating the withdrawal and ensuring the subsequent pipe cutting process, and at the same time, the angle is opened enough, and the inside of the part to be cut off and separated of the seamless steel pipe 4 is clamped and supported from the inner wall to assist positioning, avoiding the seamless steel pipe 4 from being twisted at the cutting position when cutting to the lowermost position, and improving the final cutting quality.

[0048] As shown in Figure 3 , Figure 4 , Figure 8 Figure 9 and Figure 10 , one end of the curved rod 6 is provided with a mounting cavity 24, a communication cavity 23 is formed in the inside of the curved rod 6, the communication cavity 23 is communicated with the mounting cavity 24, a gas pump 27 is fixedly installed on the top of the curved rod 6, a gas pipe 28 is fixedly communicated on the side surface of the gas pump 27, the gas outlet end of the gas pipe 28 is fixedly sleeved on the top of the curved rod 6 and communicated with the communication cavity 23, a second ring groove 26 is formed in the inside of the curved rod 6, the second ring groove 26 is located on the outside of the mounting cavity 24 and communicated with the mounting cavity 24, a flushing assembly 25 is rotatably installed on the inner surface of the mounting cavity 24, the flushing assembly 25 comprises a rotating sleeve 251, a through hole 252, a fixed rod 253, a fan blade 254, a curved pipe 255 and a clamping ring 256, the rotating sleeve 251 is rotatably sleeved in the inside of the mounting cavity 24, the clamping ring 256 is fixedly sleeved on the outer surface of the rotating sleeve 251, the clamping ring 256 is rotatably sleeved in the second ring groove 26, the through hole 252 is formed on the end face of the rotating sleeve 251, the fixed rod 253 is fixedly connected on the inner surface of the rotating sleeve 251, the fan blade 254 is fixedly sleeved on the outer surface of the fixed rod 253, the fan blade 254 is located in the communication cavity 23, the curved pipe 255 is annularly distributed on the outer end face of the rotating sleeve 251, and the curved pipe 255 is communicated with the through hole 252.

[0049] In use, the installation cavity 24 is used to complete the rotational installation of the flushing assembly 25, the communication cavity 23 is used to guide the high-pressure gas, the high-pressure gas is used to push the fan blade 254 to rotate, the rotating sleeve 251 is rotated, the rotational blowing is completed, the elbow 255 is curved towards the inner wall of the seamless steel pipe 4, the high-pressure airflow is used to realize the outward blowing and cleaning, the snap ring 256 and the second ring groove 26 are rotatably connected, and the stable rotation is maintained to avoid lateral movement.

[0050] As shown in Figure 1 and Figure 2 The moving assembly 5 includes a fixed track frame 51, a second electric push rod 52, and a movable plate 53. The fixed track frame 51 is fixedly installed on the outer side of the front end of the placing rack 1. The second electric push rod 52 is fixedly installed inside the fixed track frame 51. The movable plate 53 is slidably connected inside the fixed track frame 51 and is fixedly connected with the second electric push rod 52. The top surface of the movable plate 53 is fixedly connected with the curved rod 6. The cutting assembly 2 is liftably installed on the placing rack 1. The clamping and positioning assembly 3 is fixedly installed on both sides of the placing rack 1. The seamless steel pipe 4 is placed on the top of the placing rack 1. The cutting assembly 2 is located above the seamless steel pipe 4.

[0051] In use, the second electric push rod 52 in the moving assembly 5 controls the lateral movement of the movable plate 53, thereby controlling the left-right movement of the curved rod 6. By changing the position, the effects of supporting cutting and strengthening stability and blowing are realized respectively. The cutting assembly 2 and the clamping and positioning assembly 3 are both existing mechanisms. The cutting assembly 2 uses a lifting mode to complete cutting in cooperation with a reciprocating steel saw blade. The clamping and positioning assembly 3 is used to clamp and position the seamless steel pipe to be cut.

[0052] A seamless steel pipe cutting device and a cutting method thereof include the following cutting steps:

[0053] First step: Place the seamless steel pipe 4 on the top of the placing rack 1 and move it to the target position. Start the clamping and positioning assembly 3 to clamp the seamless steel pipe 4. Start the moving assembly 5 to make the moving assembly 5 drive the curved rod 6 and the support block 11 at one end of the curved rod 6 to be sleeved into the front end of the seamless steel pipe 4.

[0054] Second step: Keep two support blocks 11 in each group of support blocks 11 distributed before and after the cutting position on both sides. Start the first electric push rod 14 in one of the two groups of installation frames 10 to push the movable frame 13 to move along the inside of the installation frame 10 and drive the support block 11 to contact the upper part of the inner wall of the seamless steel pipe 4. Start the cutting assembly 2 to cut the top part.

[0055] Third step: as the cutting assembly 2 cuts the top and continues to cut down, the two sides of the cutting edge on the outer surface of the seamless steel tube 4 move down along the circumference of the outer side of the seamless steel tube 4, the rotating assembly 15 is started to rotate, the two sides of the engaging gear 18 are rotated, the two sides of the rotating shaft 17 are rotated in the support seat 16 to rotate the winding wheel 19, the two sides of the winding wheel rotate simultaneously and wind the steel rope 20, the two groups of installation frames 10 are simultaneously pulled down along the guide assembly 21 to swing the installation frame 10, as the spring 12 is stretched, the two groups of installation frames 10 drive the two groups of support blocks 11 to swing along with the downward movement of the cutting assembly 2, the support blocks 11 move along the cutting position on the outer surface of the seamless steel tube 4;

[0056] Fourth step: when the cutting assembly 2 completes the cutting of a part of the top of the seamless steel tube 4, the cutting assembly 2 is maintained to stop, the rotating assembly 15 continues to pull the two sides of the installation frame 10 to open completely to the two sides, the moving assembly 5 is started to move the two groups of support blocks 11 out from below the cutting assembly 2, and the cutting assembly 2 is continued to be started to complete the overall cutting;

[0057] Fifth step: after the cutting is completed and the cutting assembly 2 is reset, the air pump 27 is started, the air pump 27 is started to pass the high-pressure gas into the communication cavity 23 through the air pipe 28, the fan blade 254 in the flushing assembly 25 is rotated in the communication cavity 23, the flushing assembly 25 is rotated, the gas passing through the through hole 252 is sprayed along the curved pipe 255, the curved pipe 255 is rotated and flushed inside the cut seamless steel tube 4, as the moving assembly 5 is started to move the curved rod 6 from inside to outside, the cutting fluid and waste in the seamless steel tube 4 are flushed out together;

[0058] Sixth step: after the flushing is completed, the moving assembly 5 drives the curved rod 6 to move away from the cut seamless steel tube 4, the support roller in the placing rack 1 is rotated, and the cut seamless steel tube 4 is pushed to fall out forward.

[0059] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A seamless steel pipe cutting device, comprising a placement frame (1), a cutting assembly (2), a clamping and positioning assembly (3) and a seamless steel pipe (4), characterized in that: The front end of the placement rack (1) is provided with a moving assembly (5), the top of the moving assembly (5) is installed with a curved rod (6), the outer surface of the curved rod (6) is respectively sleeved with a No. 1 ring (7) and a No. 2 ring (8), the tops of the No. 1 ring (7) and the No. 2 ring (8) are fixedly connected with a connecting block (9), the top surface of the connecting block (9) is fixedly connected with a mounting frame (10), the interior of the mounting frame (10) is fixedly installed with a No. 1 electric push rod (14), the interior of the mounting frame (10) is movably sleeved with a movable frame (13), the movable end of the No. 1 electric push rod (14) is fixedly connected to the movable frame (13), the outer end of the movable frame (13) is fixedly connected with a support block (11), the number of the support blocks (11) is four, and each group of two is divided into two groups on the left and right. There are two mounting frames (10), a spring (12) is fixedly connected between the two mounting frames (10), a rotating assembly (15) is fixedly installed at the bottom of the curved rod (6), a guide assembly (21) is fixedly sleeved on the outer surface of the curved rod (6), a support seat (16) is fixedly connected below the guide assembly (21), a rotating shaft (17) is rotatably sleeved inside the support seat (16), a No. 1 gear (18) is fixedly sleeved on the outer surface of the rotating shaft (17), the No. 1 gear (18) is meshed with the rotating assembly (15), a winding wheel (19) is fixedly installed at one end of the rotating shaft (17), a steel rope (20) is wound around the outer surface of the winding wheel (19), and one end of the steel rope (20) is fixedly connected to the side surface of the mounting frame (10).

2. The seamless steel pipe cutting equipment according to claim 1, characterized in that: The outer surface of the curved rod (6) is provided with a first ring groove (22), and the inner surface of the first ring groove (22) is rotatably connected to the first ring (7) and the second ring (8). The number of the second rings (8) is two and they are symmetrically distributed on both sides of the first ring (7).

3. The seamless steel pipe cutting equipment according to claim 1, characterized in that: The top surfaces of the left and right groups of support blocks (11) are arc-shaped and fit the inner wall of the seamless steel pipe (4). The support blocks (11) of each group are symmetrically distributed front to back and have a gap. The two mounting frames (10) are symmetrically distributed left to right on the top of the curved rod (6).

4. The seamless steel pipe cutting equipment according to claim 1, characterized in that: The rotating assembly (15) includes a motor base (151), a motor (152) and a second gear (153), wherein the motor base (151) is fixedly connected to the bottom of the crankshaft (6), the motor (152) is fixedly installed inside the motor base (151), the second gear (153) is fixedly sleeved on the output shaft of the motor (152), the second gear (153) is meshed with the first gear (18), and the number of the first gear (18) is two and symmetrically distributed on both sides of the second gear (153).

5. The seamless steel pipe cutting equipment according to claim 1, characterized in that: The guide assembly (21) comprises a fixing ring (211), a guide ring (212) and a guide hole (213); the fixing ring (211) is fixedly sleeved on the outer surface of the curved rod (6) and symmetrically distributed on both sides of the first ring groove (22); the guide ring (212) is a semicircular ring; the guide ring (212) is fixedly connected between the two fixing rings (211); the guide hole (213) is opened on the top end surface of the guide ring (212); and the inner surface of the guide ring (212) is movably sleeved with the steel rope (20).

6. The seamless steel pipe cutting equipment according to claim 1, characterized in that: A mounting cavity (24) is provided at one end of the curved rod (6), a connecting cavity (23) is provided inside the curved rod (6), the connecting cavity (23) is communicated with the mounting cavity (24), an air pump (27) is fixedly installed on the top of the curved rod (6), an air pipe (28) is fixedly communicated with the side of the air pump (27), an air outlet end of the air pipe (28) is fixedly sleeved on the top of the curved rod (6) and communicated with the connecting cavity (23), a second annular groove (26) is provided inside the curved rod (6), the second annular groove (26) is located outside the mounting cavity (24) and communicated with the mounting cavity (24), and a flushing assembly (25) is rotatably installed on the inner surface of the mounting cavity (24).

7. The seamless steel pipe cutting equipment according to claim 6, characterized in that: The flushing assembly (25) includes a rotating sleeve (251), a through hole (252), a fixed rod (253), a fan blade (254), a curved tube (255) and a snap ring (256). The rotating sleeve (251) is rotatably sleeved inside the installation cavity (24). The snap ring (256) is fixedly sleeved on the outer surface of the rotating sleeve (251). The snap ring (256) is rotatably sleeved in the second ring groove (26). The through hole (252) is opened on the end surface of the rotating sleeve (251). The fixed rod (253) is fixedly connected to the inner surface of the rotating sleeve (251). The fan blade (254) is fixedly sleeved on the outer surface of the fixed rod (253). The fan blade (254) is located in the communicating cavity (23). The curved tube (255) is annularly distributed on the outer end surface of the rotating sleeve (251). The curved tube (255) is communicated with the through hole (252).

8. The seamless steel pipe cutting equipment according to claim 1, characterized in that: The moving assembly (5) includes a fixed track frame (51), a second electric push rod (52) and a movable plate (53), wherein the fixed track frame (51) is fixedly mounted on the outer surface of the front end of the placement rack (1), the second electric push rod (52) is fixedly mounted inside the fixed track frame (51), the movable plate (53) is slidably sleeved inside the fixed track frame (51) and fixedly connected to the second electric push rod (52), and the top surface of the movable plate (53) is fixedly connected to the curved rod (6).

9. The seamless steel pipe cutting equipment according to claim 1, characterized in that: The cutting assembly (2) is installed on the placement rack (1) in a lifting manner, the clamping and positioning assembly (3) is fixedly installed on both sides of the placement rack (1), the seamless steel pipe (4) is placed on the top of the placement rack (1), and the cutting assembly (2) is located above the seamless steel pipe (4).

10. A pipe cutting method for a seamless steel pipe cutting device according to any one of claims 1 to 9, characterized in that: The pipe cutting steps include the following: The first step is to place the seamless steel pipe (4) on the top of the placement rack (1) and move it to the target position, start the clamping and positioning assembly (3) to clamp the seamless steel pipe (4), and start the moving assembly (5) so that the moving assembly (5) drives the curved rod (6) and the support block (11) at one end of the curved rod (6) to be inserted along the front end of the seamless steel pipe (4); Step 2: Keep the two support blocks (11) in each group of support blocks (11) distributed front and back on both sides of the position to be cut, start the No. 1 electric push rod (14) in the two groups of mounting frames (10), push the movable frame (13) to move along the inside of the mounting frame (10), and drive the support blocks (11) to contact the upper part of the inner wall of the seamless steel pipe (4), start the cutting assembly (2), and perform top cutting; Step 3: As the cutting assembly (2) cuts the top and continues to cut downward, the cutouts on both sides of the outer surface of the seamless steel pipe (4) move downward along the outer periphery of the seamless steel pipe (4), and the rotating assembly (15) is started, so that the rotating assembly (15) drives the meshed No. 1 gear (18) on both sides to rotate, thereby causing the rotating shafts (17) on both sides to drive the winding wheels (19) to rotate in the support seat (16), and the winding wheels (19) on both sides rotate simultaneously and reel in the steel ropes (20), so that the left and right sets of steel ropes simultaneously pull the mounting frame (10) downward along the guide assembly (21) to swing, and as the spring (12) stretches, the two sets of mounting frames (10) drive the top two sets of support blocks (11) to swing along with the downward movement of the cutting assembly (2), and the support blocks (11) move along the cutting position of the outer surface of the seamless steel pipe (4); Step 4: After the cutting assembly (2) has completed cutting a portion of the top of the seamless steel pipe (4), the cutting assembly (2) is kept stopped, the rotating assembly (15) continues to pull the mounting frames (10) on both sides to fully open to both sides, and the moving assembly (5) is started to move the two sets of support blocks (11) out from under the cutting assembly (2), and the cutting assembly (2) is continued to be started to complete the full cutting; Step 5: After the cutting is completed and the cutting component (2) is reset, the air pump (27) is started, so that the air pump (27) is started and the high-pressure gas is passed into the communication chamber (23) through the air pipe (28), and the fan blade (254) in the flushing component (25) is pushed to rotate in the communication chamber (23), so that the flushing component (25) rotates, and at the same time, the gas passed through the through hole (252) and ejected along the curved pipe (255), so that the curved pipe (255) rotates and flushes inside the cut seamless steel pipe (4), and as the moving component (5) is started, the curved rod (6) is driven to move from the inside to the outside, and the cutting fluid and waste inside the seamless steel pipe (4) are pneumatically flushed out; Step 6: After the purging is completed, the moving assembly (5) drives the curved rod (6) away from the cut seamless steel pipe (4), so that the supporting roller in the placement rack (1) rotates and pushes the cut seamless steel pipe (4) to fall forward.

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