Automatic cutting device for circular pipe intersecting line

Abstract

The present application belongs to the technical field of pipe cutting equipment, and discloses a circular pipe intersecting line mouth automatic cutting device, which comprises a supporting unit, a pipe is arranged on the periphery of the supporting unit, the pipe has a first axis, and the periphery of the pipe is provided with a mouth cutting track, one end of the supporting unit extending into the inner cavity of the pipe is connected with a restraining unit, the supporting unit extends along the first axis and abuts against the inner wall of the pipe; the restraining unit comprises a first plate body, the first plate body forms a cavity structure with a gradually decreasing cross-sectional area from top to bottom, and the restraining unit is located on the inner side of the mouth cutting track. In the process of cutting the mouth of the pipe, the molten slag generated by cutting can be guided and restrained inside the pipe, so that the molten slag can be quickly accumulated at the bottom of the inner cavity of the pipe, and the molten slag can be prevented from being splashed at a high speed in a large range, thereby effectively reducing the slag hanging and nodulation phenomenon generated by the molten slag, and improving the workpiece quality.

Description

Technical Field

[0001] This invention relates to the field of pipe cutting equipment technology, and in particular to an automatic tinplate cutting device for intersecting lines of round pipes. Background Technology

[0002] The automatic cutting device for intersecting lines of round pipes is mainly used to process intersecting line tinplate structures at the end of round pipes that are compatible with another round pipe or irregularly shaped pipe. Existing equipment usually fixes the pipe through a clamping mechanism and drives the pipe to rotate around its own axis. It then uses a laser cutting head, plasma torch, or flame torch to complete the cutting of the intersecting line trajectory, thereby obtaining tinplate workpieces that meet the requirements of subsequent splicing, welding, and assembly.

[0003] However, during the actual cutting process, the continuous action of the cutting torch on the pipe wall will generate a large amount of high-temperature molten slag. After entering the inner cavity of the pipe, the molten slag usually impacts the inner wall of the pipe at a high speed and bounces and splashes within the inner cavity. Since the inner wall of the pipe is a closed or semi-closed space, the rebounded molten slag is easy to adhere and accumulate at different positions on the inner wall, forming slag, nodules and other phenomena, which not only affect the quality of the inner wall of the pipe, but may also increase the amount of subsequent cleaning work. Summary of the Invention

[0004] The present invention aims to provide an automatic tin-cutting device for the intersection of circular tubes, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An automatic tin-cutting device for the intersection line of a circular pipe includes a support unit, a pipe having a first axis and a tin-cutting trajectory on its periphery, and a suppression unit connected to one end of the support unit extending into the inner cavity of the pipe. The device is characterized by: The support unit extends along the first axis and abuts against the inner wall of the pipe; The suppression unit includes a first plate, which forms a cavity structure with a cross-sectional area that gradually decreases from top to bottom. The suppression unit is located inside the tinplate cutting trajectory, so that when the pipe is cut, the slag generated in the inner cavity of the pipe can enter its inner cavity through the upper opening of the first plate. The auxiliary material discharge unit includes multiple through holes opened on the first plate, the through holes connecting the inner and outer sides of the cavity structure; A buffer assembly is disposed on the periphery of the first plate so that the molten slag leaving the cavity structure can come into contact with the buffer assembly.

[0006] The above scheme is adopted: the suppression unit is placed below the cutting position by the support unit, so that when the torch cuts the pipe along the tin-cutting trajectory, the molten slag sprayed from the cutting point into the inner cavity of the pipe can be captured by the first plate. Affected by the inner cavity structure of the first plate, the molten slag will have multiple collisions in its inner cavity, but the overall movement trajectory is from top to bottom. During the process, the kinetic energy of the molten slag is continuously consumed, and it is finally discharged from the lower end of the first plate at a low speed and accumulates below the inner wall of the pipe, instead of splashing everywhere in the pipe and forming slag.

[0007] Preferably, the support unit includes a rod extending along a first axis, and a plurality of equidistant platforms are fixedly connected to the top of the rod. Each platform has a ball bearing spherically connected to its top, and the ball bearing abuts against the inner wall of the pipe.

[0008] The above solution utilizes a support unit that also supports the pipe. The support unit supports the workpiece that will separate from the main body of the pipe after cutting. Referring to existing equipment, it is known that during the cutting process of the automatic tinplate cutting device for intersecting round pipes, the cutting torch is always positioned above the pipe, and the pipe itself rotates. If the workpiece is not supported, the final connection between the pipe and the workpiece will suddenly break when the tinplate cutting is completed. The direct fall of the workpiece will likely cause a gap at the break, thus affecting the cutting quality. The support unit can support the workpiece and prevent it from falling.

[0009] Preferably, the first plate is a truncated conical structure with an upper opening larger than a lower opening.

[0010] The above scheme is adopted: the design of the first plate's conical structure can cause the molten slag sprayed from top to bottom to bounce multiple times on its inner wall, and its angle design makes the bounced molten slag move downwards instead of bouncing upwards to the cutting position.

[0011] Preferably, a pipe matching the lower opening is fixedly connected to the lower end of the first plate, the pipe is connected to the lower opening of the first plate, and a second plate is fixedly connected to the inner wall of the pipe. The second plate extends from the inner wall of the pipe toward its axis, and the free end of the second plate is located between the axis of the pipe and its inner wall.

[0012] The above scheme was adopted: the design of the pipeline determined the slag removal path, but considering that the slag was sprayed from top to bottom, some slag may not have come into contact with the inner wall of the first plate and was discharged through the pipeline. Therefore, a second plate was designed, which is located inside the pipeline. It can hinder the movement trajectory of the slag and make the slag undergo one more rebound before being discharged, thereby reducing its potential energy when discharged.

[0013] Preferably, the plurality of through holes are arranged at equal intervals along the circumference of the first plate.

[0014] Preferably, the auxiliary discharge unit further includes a plurality of third plates fixedly connected to the periphery of the first plate. The number of the plurality of third plates is the same as the number of through holes and their positions correspond one-to-one. One end of each third plate is connected to the inner wall of the corresponding through hole near the upper opening of the first plate, and the other end extends in an inclined manner toward the side where the pipe is located.

[0015] The above-mentioned scheme adopts a design with multiple through holes to distribute the discharge pressure of the pipeline. If all the slag has to be discharged through the pipeline, a large amount of slag will accumulate inside the first plate, and they will collide with each other, which is not conducive to the suppression of slag. Therefore, multiple through holes are designed so that some slag can be discharged through the through holes in advance during the rebound process inside the first plate. In order to prevent slag from directly passing through the through holes, this scheme sets a third plate outside the through holes, which ensures that the slag must rebound at least once on its surface after passing through the through holes.

[0016] Preferably, the inner wall of the first plate has a groove, which extends spirally downward from the upper opening of the first plate along its inner wall to the lower opening, and the inclination direction of the third plate is consistent with the extension direction of the groove.

[0017] The above scheme is adopted: the design of the tank can guide the vertically downward molten slag, forcing it to generate circumferential movement, thereby extending the movement path of the molten slag inside the first plate and improving the effect of kinetic energy consumption. The inclination direction of the third plate is consistent with the extension direction of the tank, so that the molten slag can be naturally discharged through the through hole during the circumferential movement, avoiding repeated collisions of the molten slag near the through hole and causing blockage.

[0018] Preferably, the buffer assembly includes a plurality of fourth plates arranged circumferentially around the first plate, the plurality of fourth plates being attached to the outer wall of the first plate and respectively covering the area between two adjacent through holes.

[0019] The above solution is adopted because, considering that a small amount of molten slag will inevitably be discharged directly through the through hole or pipe, and its kinetic energy will not be consumed, so it will bounce after contacting the inner wall of the pipe, a buffer component is designed in this solution. After contacting the bottom inner wall of the pipe, this part of the molten slag will bounce upward and then contact the buffer component. At this time, the function of the buffer component is no longer to make it bounce, but to absorb its kinetic energy and make the molten slag slow down and fall as soon as possible.

[0020] Preferably, the fourth plate is a porous plate structure.

[0021] The beneficial effects of this technical solution compared to existing technologies are as follows: This solution can guide and suppress the molten slag generated during the tinplate cutting process inside the pipe, causing the molten slag to quickly settle and accumulate at the bottom of the pipe cavity, avoiding large-scale high-speed splashing. This effectively reduces slag buildup and nodule formation, thus improving workpiece quality. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the first position of the device and pipe provided by the present invention; Figure 2 This is a schematic diagram of the suppression unit provided by the present invention; Figure 3 This is a schematic diagram of the second position of the device and pipe provided by the present invention; Figure 4 A schematic diagram of the buffer unit provided by the present invention; Figure 5 This is an exploded schematic diagram of the device provided by the present invention; Figure 6 A schematic diagram of the slag movement trajectory provided by the present invention.

[0023] Reference numerals: 100, support unit; 101, rod; 102, platform; 103, ball bearing; 200, suppression unit; 201, first plate; 202, pipe; 203, second plate; 300, auxiliary discharge unit; 301, through hole; 302, third plate; 303, trough; 400, buffer assembly; 401, fourth plate. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments: like Figure 1-3 An automatic tin-cutting device for the intersection line of a circular pipe is shown, comprising a support unit 100, a pipe having a first axis and a tin-cutting trajectory on its periphery, and a suppression unit 200 connected to one end of the support unit 100 extending into the inner cavity of the pipe. The device is characterized by: A support unit 100 extends along a first axis and abuts against the inner wall of the pipe; The suppression unit 200 includes a first plate 201. The first plate 201 forms a cavity structure with a cross-sectional area that gradually decreases from top to bottom. The suppression unit 200 is located inside the tinplate cutting trajectory, so that when the pipe is cut, the slag generated in the inner cavity of the pipe can enter its inner cavity through the upper opening of the first plate 201. The auxiliary material discharge unit 300 includes multiple through holes 301 opened on the first plate 201, and the through holes 301 connect the inner and outer sides of the cavity structure. A buffer assembly 400 is disposed on the periphery of the first plate 201 so that the molten slag leaving the cavity structure can come into contact with the buffer assembly 400.

[0025] Figure 1 and Figure 6 In this design, P represents the pipe, L represents the tinplate cutting trajectory, and T represents the cutting torch. When in use, the maximum outer diameter of the first plate 201 in this design should be smaller than the inner diameter of the pipe. With this setting, the highest point of the first plate 201 can be located above the first axis of the pipe and will not contact the pipe, thus ensuring its ability to collect slag and preventing slag from hitting the inner wall of the pipe before entering the first plate 201. When used in existing equipment, the support unit 100 can be connected to the cutting and welding bracket, so that the suppression unit 200 always moves with the cutting and welding, thereby ensuring that the first plate 201 is always below the tinplate cutting trajectory.

[0026] Further explanation: The conical inclination angle of the first plate 201 is preferably designed to be between 30° and 60°, more preferably between 40° and 50°. If the conical angle of the first plate 201 is too small, the molten slag will easily slide down the inner wall of the first plate 201 after contacting it, reducing the number of collisions and thus hindering the consumption of molten slag kinetic energy. If the conical angle of the first plate 201 is too large, the molten slag will easily generate a large rebound angle after hitting the inner wall, increasing the tendency of the molten slag to move upward. Through the above angle design, the molten slag will generally maintain a downward movement state after colliding inside the first plate 201, gradually reducing its movement speed while extending the movement path, thereby improving the suppression effect on the molten slag.

[0027] Further explanation: The inner wall of the first plate 201 is coated, preferably with graphite coating. Graphite material has good high temperature resistance and low surface friction coefficient. When high temperature molten slag comes into contact with the inner wall of 201, it is not easy to adhere to its surface, thereby reducing the possibility of slag forming after molten slag adheres.

[0028] The support unit 100 includes a rod 101 extending along a first axis. A plurality of equidistant platforms 102 are fixedly connected to the top of the rod 101. Each platform 102 has a ball bearing 103 spherically connected to its top. The ball bearing 103 abuts against the inner wall of the pipe.

[0029] refer to Figure 1 In use, the design of multiple balls 103 arranged in a straight line along the first axis allows the pipe above it to rotate freely or move along the axis. The multiple balls 103 can roll along with it, thereby reducing friction, providing support, reducing wear and noise.

[0030] The first plate 201 is a truncated cone structure with an upper opening larger than a lower opening. The lower end of the first plate 201 is fixedly connected to a pipe 202 that matches the lower opening. The pipe 202 is connected to the lower opening of the first plate 201. The inner wall of the pipe 202 is fixedly connected to a second plate 203. The second plate 203 extends from the inner wall of the pipe 202 toward its axis, and the free end of the second plate 203 is located between the axis of the pipe 202 and its inner wall.

[0031] refer to Figure 2 The first plate 201 preferably adopts a conical design with its inner wall inclined. After the molten slag enters, it will not fall vertically directly, but will come into contact with the inner wall of the first plate 201 and change its direction of movement. During the movement of the molten slag inside the first plate 201, its kinetic energy will gradually decrease due to multiple collisions and will continue to move towards the lower end of the first plate 201, thereby reducing the situation where the molten slag directly hits the inner wall of the pipe and causes a large-scale splash.

[0032] Multiple through holes 301 are arranged at equal intervals along the circumference of the first plate 201. The auxiliary discharge unit 300 also includes multiple third plates 302 fixedly connected to the periphery of the first plate 201. The number of the multiple third plates 302 is the same as that of the through holes 301 and their positions correspond one-to-one. One end of each third plate 302 is connected to the inner wall of the corresponding through hole 301 near the upper opening of the first plate 201, and the other end extends in an inclined manner toward the side where the pipe 202 is located.

[0033] refer to Figure 4 By designing the through hole 301, the molten slag does not need to be completely concentrated in the pipe 202 before being discharged. Instead, it will be discharged in advance through the through hole 301 during the movement, thereby reducing the molten slag accumulation phenomenon in the lower area of ​​the first plate 201 and reducing the disorderly splashing caused by the collision between molten slag. When the molten slag is discharged through the through hole 301, the third plate 302 can receive and guide the molten slag, so that the molten slag continues to move downward along the surface of the third plate 302 instead of splashing directly outward. By setting the third plate 302, the movement direction of the molten slag can be further controlled, and the stability of the molten slag discharge process can be improved.

[0034] The inner wall of the first plate 201 is provided with a groove 303. The groove 303 extends spirally downward from the upper opening of the first plate 201 along its inner wall to its lower opening. The inclination direction of the third plate 302 is consistent with the extension direction of the groove 303.

[0035] refer to Figure 2 and Figure 5The trough 303 can guide the molten slag entering the first plate 201, causing the molten slag, which originally moved mainly in the vertical direction, to gradually develop a circumferential movement trend, thereby extending the movement path of the molten slag inside the first plate 201. Since the molten slag needs to continuously change direction during the movement, its kinetic energy will be further consumed. At the same time, the inclination direction of the third plate 302 is consistent with the extension direction of the trough 303, so that after the molten slag moves along the trough 303 to the vicinity of the through hole 301, it can be discharged through the through hole 301 and continue to move downward along the third plate 302, thereby forming a continuous path and reducing the situation where the molten slag repeatedly collides and causes blockage near the through hole 301.

[0036] The buffer assembly 400 includes a plurality of fourth plates 401 arranged circumferentially around the first plate 201. The plurality of fourth plates 401 are attached to the outer wall of the first plate 201 and respectively cover the area between two adjacent through holes 301. The fourth plates 401 are perforated plate structures.

[0037] refer to Figure 6 It can be seen that, Figure 6 The arrows in the diagram indicate the movement path of the slag after it is generated at the top of the pipe. Since it is impossible to completely prevent a small amount of slag from being discharged directly through the through hole 301 or the pipe 202, this part of the slag may still bounce after contacting the inner wall of the pipe. The setting of multiple fourth plates 401 allows the bounced slag to contact the fourth plate 401 first, rather than returning to the cutting area, thereby further reducing the bounce distance and bounce height of the slag.

[0038] Further explanation: The fourth plate 401 is preferably made of heat-resistant stainless steel and processed into a perforated plate structure. Heat-resistant stainless steel has good high-temperature resistance, can withstand the impact of molten slag, and is not easily deformed. The perforated plate structure forms a large number of pore spaces. When the rebounding molten slag hits the fourth plate 401, its kinetic energy can be consumed through multiple contacts between the molten slag and the hole wall, thereby reducing the rebound speed and rebound height of the molten slag, allowing the molten slag to fall to the bottom area of ​​the inner cavity of the pipe more quickly, and improving the suppression effect of molten slag rebound phenomenon.

[0039] Working principle: The support unit 100 first extends into the inner cavity of the pipe and abuts against the inner wall of the pipe through the ball bearing 103. While providing support for the pipe, it allows the pipe to rotate relative to the support unit 100. When the torch cuts the pipe along the tinplate cutting trajectory, the generated slag is sprayed into the inner cavity of the pipe and preferentially enters the interior of the first plate 201. Under the combined action of the inner wall of the first plate 201 and the groove 303, the movement direction of the slag changes to circumferential and downward movement. During the movement of the slag, some slag is discharged through the through hole 301 and continues downward along the third plate 302. Another part of the slag is discharged through the pipe 202. During the process, it is blocked by the second plate 203. Finally, the discharged slag accumulates in the bottom area of ​​the inner cavity of the pipe. A small amount of slag directly passes through the pipe 202 or the through hole 301 and bounces against the inner wall of the pipe. Then it comes into contact with the fourth plate 401, absorbs kinetic energy, and falls quickly.

[0040] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An automatic tin-cutting device for the intersection line of a circular pipe, comprising a support unit (100), wherein a pipe is disposed around the periphery of the support unit (100), the pipe having a first axis and a tin-cutting trajectory is disposed around the periphery of the pipe, and a suppression unit (200) is connected to one end of the support unit (100) extending into the inner cavity of the pipe, characterized in that: The support unit (100) extends along the first axis and abuts against the inner wall of the pipe; The suppression unit (200) includes a first plate (201), the first plate (201) forming a cavity structure with a gradually decreasing cross-sectional area from top to bottom, and the suppression unit (200) is located inside the tinplate cutting trajectory, so that when the pipe is cut, the slag generated in the inner cavity of the pipe can enter its inner cavity through the upper opening of the first plate (201). The auxiliary material discharge unit (300) includes a plurality of through holes (301) opened on the first plate (201), the through holes (301) connecting the inner and outer sides of the cavity structure; A buffer assembly (400) is disposed on the periphery of the first plate (201) so that molten slag leaving the cavity structure can come into contact with the buffer assembly (400).

2. The automatic tin-cutting device for the intersection line of a circular tube as described in claim 1, characterized in that: The support unit (100) includes a rod (101) extending along a first axis. A plurality of equidistant platforms (102) are fixedly connected to the top of the rod (101). Each platform (102) has a ball (103) spherically connected to its top. The ball (103) abuts against the inner wall of the pipe.

3. The automatic tinplate cutting device for intersecting circular pipes as described in claim 1, characterized in that: The first plate (201) is a truncated cone structure with an upper opening larger than a lower opening.

4. The automatic tin-cutting device for the intersection line of a circular tube as described in claim 1, characterized in that: The lower end of the first plate (201) is fixedly connected to a pipe (202) that matches the lower end opening. The pipe (202) is connected to the lower end opening of the first plate (201). The inner wall of the pipe (202) is fixedly connected to a second plate (203). The second plate (203) extends from the inner wall of the pipe (202) toward its axis, and the free end of the second plate (203) is located between the axis of the pipe (202) and its inner wall.

5. The automatic tinplate cutting device for intersecting circular tubes as described in claim 1, characterized in that: The plurality of through holes (301) are arranged at equal intervals along the circumference of the first plate (201).

6. The automatic tin-cutting device for the intersection line of a circular tube as described in claim 4, characterized in that: The auxiliary discharge unit (300) also includes a plurality of third plates (302) fixedly connected to the periphery of the first plate (201). The number of the plurality of third plates (302) is the same as that of the through holes (301) and their positions correspond one-to-one. One end of each third plate (302) is connected to the inner wall of the corresponding through hole (301) near the upper opening of the first plate (201), and the other end extends obliquely toward the side where the pipe (202) is located.

7. The automatic tin-cutting device for intersecting lines of circular tubes as described in claim 6, characterized in that: The inner wall of the first plate (201) is provided with a groove (303). The groove (303) extends spirally downward from the upper opening of the first plate (201) along its inner wall to its lower opening. The inclination direction of the third plate (302) is consistent with the extension direction of the groove (303).

8. The automatic tin-cutting device for the intersection line of a circular tube as described in claim 1, characterized in that: The buffer assembly (400) includes a plurality of fourth plates (401) arranged circumferentially around the first plate (201), the plurality of fourth plates (401) being attached to the outer wall of the first plate (201) and respectively covering the area between two adjacent through holes (301).

9. The automatic tin-cutting device for the intersection line of a circular tube as described in claim 8, characterized in that: The fourth plate (401) is a porous plate structure.

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