CN112872625A

CN112872625A - Pipe clamp, quick-assembly type slag pumping mechanism and laser cutting machine

Info

Publication number: CN112872625A
Application number: CN202110251143.XA
Authority: CN
Inventors: 黄建滨
Original assignee: Guangdong Chittak Intelligent Equipment Co ltd
Current assignee: Guangdong Chittak Intelligent Equipment Co ltd
Priority date: 2021-03-08
Filing date: 2021-03-08
Publication date: 2021-06-01

Abstract

The pipe clamp is columnar and is provided with an axial installation through hole, the pipe clamp comprises a front clamping part and a rear connecting part which are connected together in a front-rear mode, the front clamping part is provided with at least 2 strip-shaped cracks in the axial direction, and the strip-shaped cracks penetrate through the installation through hole and penetrate through the front end of the front clamping part so that the front clamping part can be tightened and clamped in the radial direction; and an annular groove for placing the annular sealing ring is formed in the inner side wall of the rear connecting part.

Description

Pipe clamp, quick-assembly type slag pumping mechanism and laser cutting machine

Technical Field

The invention relates to the technical field related to laser cutting, in particular to a special pipe clamp, a quick-assembly slag pumping mechanism applying the pipe clamp and a laser cutting machine.

Background

The laser cutting machining has high precision and high cutting efficiency, and can replace the traditional saw blade cutting machining, and particularly has more outstanding advantages in the aspect of stainless steel pipe cutting. However, during laser cutting, a large amount of smoke and high-temperature welding slag are inevitably generated, when the pipe is cut, the spark welding slag generated by melting the metal pipe at high temperature falls into the cut pipe, and the welding slag is formed after cooling, so that the quality of the cut pipe is defective or unqualified, and the subsequent processing and use of the workpiece are seriously influenced.

In order to solve the problem of welding slag of laser cutting, the applicant discloses a slag removing mechanism in the Chinese utility model patent with the publication number of CN210818001U, entitled "slag removing mechanism and applied pipe laser cutting machine", which was applied earlier, wherein the slag removing mechanism comprises a hollow outer suction pipe, a side wall gap is arranged on the pipe side wall of one section of the outer suction pipe, the outer suction pipe is used for being inserted into a cut pipe when starting the current cutting task, and the side wall gap of the outer suction pipe is used for not only facing a laser head but also being positioned right ahead of the irradiation direction of the laser beam when starting the current cutting task; an air suction channel is arranged in the outer suction pipe and is used for sucking air in the outer suction pipe; the outer suction pipe is internally provided with a suction channel and is also provided with an inner shovel which can move relative to the outer suction pipe, so that the inner shovel can be used for timely and effectively shoveling the condensed metal slag adhered in the inner suction pipe. Although the slag removing mechanism can effectively remove welding slag, the structure is relatively complex, and the cost is relatively high. In order to meet the demands of different markets, a more simple and effective deslagging mechanism is needed.

The most common deslagging mechanism of the laser cutting machine generally comprises a suction pipe, an air draft device connected with the suction pipe and a fixing device used for fixing the suction pipe, wherein a side wall notch is formed in the pipe wall of the front end of the suction pipe, and the fixing device is used for connecting the suction pipe; the suction pipe is generally made of a copper pipe so as to be beneficial to heat dissipation, in order to prevent the suction pipe from being clamped and deformed by the fixing device, a fixing sleeve is welded at the rear end part of the suction pipe, and the fixing device is clamped on the fixing sleeve so as to be connected with the suction pipe. In practice, the welding slag cannot be completely sucked away due to the limited suction force of the air draft device, so that the welding slag is continuously accumulated in the pipe body at the front end of the suction pipe, and the suction pipe and the fixed sleeve need to be replaced after the suction pipe is used for a period of time.

Disclosure of Invention

Since the outer suction pipe and the fixing sleeve in the prior art are welded together, they need to be replaced together, but the replaced outer suction pipe and fixing sleeve cannot be reused, which causes a certain waste. In order to improve the utilization rate of the outer suction pipe and the fixed sleeve, reduce production waste and further simplify the installation and connection structure of the outer suction pipe and the fixed sleeve, the invention provides a special pipe clamp of a quick-assembly slag pumping mechanism for laser cutting, which is characterized in that the pipe clamp is columnar and is provided with an axial installation through hole, the pipe clamp comprises a front clamp part and a rear connecting part which are connected together front and rear, the front clamp part is provided with at least 2 strip-shaped cracks along the axial direction, and the strip-shaped cracks penetrate through the installation through hole and break the front end of the front clamp part so as to play a role in tightening and clamping when the front clamp part is tightened along the radial direction; and an annular groove for placing the annular sealing ring is formed in the inner side wall of the rear connecting part.

The mounting through hole is a passage space which is defined by the pipe clamp wall body and is arranged along the axial direction, the mounting through hole penetrates through the front clamping part and the rear connecting part of the pipe clamp, and the mounting through hole is used for accommodating a slag-pumping pipe for pumping smoke dust and welding slag.

The front clamping part is a structure part which is positioned at the front part of the pipe clamp and plays a role in clamping, the rear end of the front clamping part is connected with the rear connecting part, the front end of the front clamping part is suspended, at least 2 strip cracks penetrate through the installation through hole and penetrate through the front end of the front clamping part, so that the front clamping part forms at least 2 cantilevers capable of swinging, the front clamping part allows the slag extracting pipe to be inserted into the installation through hole or pulled out of the installation through hole in a natural state, and when the front clamping part is tightened along the radial direction, the cantilevers of the front clamping part can swing in the installation through hole so as to enable the front clamping part to clamp the slag extracting pipe inserted into the installation through hole. In addition, because the shape of installation through-hole and scum pipe is assorted, through preceding clamp centre gripping the scum pipe can increase the area of contact of preceding clamp with the scum pipe, not only can disperse clamping-force, can increase again in addition axial contact frictional force between scum pipe and the preceding clamp can also reduce when improving the pipe clamp centre gripping effect the scum pipe is pressed from both sides the degree of deformation.

The rear connecting part is a supporting base connecting part of the front clamping part cantilever and is also a structure connected with an external air pumping mechanism, and a suction pipe of the external air pumping mechanism is connected to the rear connecting part and is communicated with the slag pumping pipe so as to realize the effect of pumping welding slag.

According to the technical scheme, compared with the prior art, the invention has the beneficial technical effects that: firstly, the slag pumping pipe inserted into the mounting through hole can be clamped only by pressing the front clamping part of the pipe clamp, so that the pipe clamp and the slag pumping pipe are quickly connected without being welded and fixed as in the prior art, and the mounting efficiency of the slag pumping mechanism is greatly improved; secondly, the clamping state can be released by loosening the front clamping part of the pipe clamp, so that the slag extracting pipe can be taken out, the pipe clamp can be reused, and the use efficiency of the pipe clamp is greatly improved; and thirdly, the ring groove of the rear connecting part is used for placing an annular sealing ring, so that the annular sealing ring can realize the sealing effect of the connection between the slag pumping pipe and the pipe clamp, and therefore when the external pumping mechanism pumps gas, the external gas can be prevented from entering the gap between the slag pumping pipe and the pipe clamp into the slag pumping pipe, and the pumping performance of the slag pumping pipe is reduced.

In order to adapt to the processing environment, the pipe clamp is generally made of a material with high rigidity, such as metal, the front clamping portion which is in a cantilever shape is difficult to swing, and in order to improve the swinging capacity of the front clamping portion, a further technical scheme can be that the axial length of the front clamping portion in the axial direction is larger than that of the rear connecting portion, so that the longer front clamping portion can swing more easily, and the clamping effect of the front clamping portion is improved.

The factors that influence preceding double-layered portion elastic deformation are apart from the length of the arm body, and the width of the arm body in addition, and further technical scheme can also be, the preceding double-layered portion is close to the regional of being close to of back connecting portion is provided with local expansion breach, one local expansion breach links up one rectangular breach, the circumference width of local expansion breach is greater than the circumference width of rectangular breach. The local expansion gap enables the circumferential width of the root of each cantilever of the front clamping part to be smaller than the circumferential widths of other parts of the cantilever, so that the elastic deformation capacity of the front clamping part is improved, and meanwhile, the connection area of the front clamping part and the slag extracting pipe is also ensured, so that the clamping capacity of the pipe clamp is improved.

The factors influencing the elastic deformation of the front clamping part also include the thickness of the arm body, and the further technical scheme can be that the close area is arranged in a concave shape. The recessed arrangement may be varied, and may be arranged on the outer surface of the front clip portion so that the outer diameter of the approaching region is smaller than the outer diameters of the other regions of the front clip portion and the outer diameter of the rear connecting portion, or arranged on the inner surface of the front clip portion, that is, the surface facing the mounting through hole so that the inner diameter of the approaching region is larger than the inner diameter of the other regions of the front clip portion, or arranged on both the inner and outer surfaces of the front clip portion. Thus, the thickness of the cantilever root of the front clamping part is reduced, so that the clamping capacity of the pipe clamp is improved.

On the other hand, the pipe clamp is used for clamping the slag extracting pipe and is also used for connecting structural components of an external air extracting mechanism, and in order to enhance the connecting capacity of the pipe clamp, the outer side wall of the rear connecting part can be in a pagoda shape. Wherein, pagoda form means 2 layers or multilayer continuous toper structure that form on the lateral wall of back connecting portion, the less one end orientation of toper diameter the rear end of back connecting portion, the great one end orientation of toper diameter preceding clamp part, this kind of structure is favorable to on the one hand the pipe clamp with peg graft in other connecting pipes, the wall body of on the other hand pagoda form similar barb structure, be favorable to the reinforcing the joint strength of back connecting portion and other connecting pipes.

The pipe clamp has the advantages, so that the pipe clamp can be applied to a quick-assembly slag pumping mechanism, the quick-assembly slag pumping mechanism comprises a slag pumping pipe and the pipe clamp, a side wall notch is formed in the pipe wall of the front end of the slag pumping pipe, and the rear end of the slag pumping pipe is inserted into the installation through hole; still including setting up annular seal in the annular, work as it pegs graft to take out the sediment pipe when in the mounting hole, annular seal cover is in thereby take out the periphery of sediment pipe can seal take out the sediment pipe with installation clearance between the pipe clamp, when radially tightening up preceding clamp time preceding clamp can grasp take out the sediment pipe.

The side wall notch is an opening arranged on the front end pipe wall of the slag extracting pipe, smoke dust or welding slag can pass through the side wall notch and enter the slag extracting pipe, the side wall notch can be a through hole in the front end pipe wall of the slag extracting pipe, and a certain distance is reserved between the through hole and the front end port of the slag extracting pipe; the side wall gap can also be a long strip gap and is communicated with the front end port of the slag-pumping pipe; but the side wall gap does not interfere with the installation and connection of the sealing cover and the front end port of the slag extracting pipe.

The annular sealing ring is a component which is arranged in the ring groove and plays a role in sealing, has a shape matched with the ring groove, and is not easy to fall off when being placed in the ring groove; in addition, the annular sealing ring can be sleeved on the periphery of the slag extracting pipe in a sealing mode, so that the rear end of the slag extracting pipe is not only inserted into the front clamping part of the pipe clamp, but also can be continuously inserted into the rear connecting part, or further penetrates through the mounting through hole to extend out of the rear part of the pipe clamp, the slag extracting pipe is made to have a longer length, when excessive welding slag is accumulated at the front end of the slag extracting pipe, part of the front end of the slag extracting pipe can be cut off, the side wall gap is machined again, and the slag extracting pipe can still be continuously used after being inserted into the pipe clamp. Furthermore, a chamfer is arranged at the rear end of the slag extracting pipe, so that the slag extracting pipe can be smoothly inserted into the annular sealing ring and the annular sealing ring can be prevented from being scratched by sharp corners.

The quick-assembly slag pumping mechanism has the advantages that the slag pumping pipe and the pipe clamp are arranged in a split mode, the slag pumping pipe can be easily inserted into the pipe clamp, the front clamping part of the pipe clamp can clamp the slag pumping pipe, the slag pumping pipe and the pipe clamp can be installed and replaced conveniently, and importantly, the slag pumping pipe or the pipe clamp can be replaced independently, so that the utilization rate of components is improved; in addition, through take out the sediment pipe periphery wall with set up between the internal perisporium of back pipe clamp ring seal has filled take out the installation clearance between sediment pipe and the pipe clamp, be favorable to improving the air tightness of pipe clamp and take out the sediment pipe further improves the suction capacity of taking out the sediment mechanism.

The side wall notch is an opening for sucking smoke dust and welding slag, but the side wall notch is possibly arranged at a position close to or communicated with a front end port of the slag pumping pipe, although the front end port of the slag pumping pipe can also realize the purpose of sucking together with the side wall notch, the suction effect of the fast-assembly slag pumping mechanism is influenced on the contrary due to the large area of a suction port, and therefore, the further technical scheme can be that the front end part of the slag pumping pipe is provided with a blocking cover for blocking the front end port of the slag pumping pipe, the blocking cover is covered on the front end port of the slag pumping pipe, but the side wall notch cannot be completely blocked, so that the side wall notch serves as a main suction port, and the suction force at the side wall notch of the fast-assembly slag pumping mechanism is greatly improved. Further, the blocking cover can be detachably connected to the slag pumping pipe, so that the blocking cover can be reused when the slag pumping pipe is repaired or replaced.

The quick-mounting slag pumping mechanism has the advantages, so that the quick-mounting slag pumping mechanism can be applied to a laser cutting machine, the laser cutting machine comprises a main frame and a laser head, and the laser head is used for emitting laser beams to cut pipes; the slag extractor is characterized by further comprising a slide rail arranged on the main rack, a fixing clamp arranged on the slide rail in a sliding mode and a fast-assembly slag extracting mechanism, wherein the fixing clamp is used for clamping a pipe clamp of the fast-assembly slag extracting mechanism so as to enable a front clamping part of the pipe clamp to clamp a slag extracting pipe, and the fixing clamp can drive the slag extracting pipe to move forward and backward relative to the laser head so as to enable a side wall notch of the slag extracting pipe to move right to the position of the laser head.

The main frame is used for supporting the sliding rail, the fixing clamp and a base component of the quick-mounting slag pumping mechanism and can also support a laser generator, and the laser head is installed on the laser generator to generate high-temperature laser beams.

The laser cutting machine further comprises an external air exhaust mechanism, the external air exhaust mechanism comprises a suction pipe and a fan, one end of the suction pipe is connected with the other end of the rear connecting part of the pipe clamp, and the quick-mounting slag exhaust mechanism can be close to a cutting position as far as possible to better suck smoke dust and welding slag generated during cutting.

The utility model discloses a laser cutting machine, including laser head, laser cutting machine, laser head, slag pipe, fixation clamp, laser head, laser cutting machine, the pipe is sent to being cut when using laser cutting machine the place ahead position of laser head and constantly rotation, the slag pipe is in insert under the drive of fixation clamp in being cut the pipe, let the lateral wall opening of slag pipe also move to just to the position of laser head, the laser head sends the produced welding slag spark of laser cutting pipe and is inhaled in the slag pipe, further by finally outside air exhaust mechanism inhales away.

The laser cutting machine further comprises a machine shell arranged on the main frame, the machine shell comprises a left vertical plate, a right vertical plate, a front vertical plate, a rear vertical plate and a top plate, the left vertical plate, the right vertical plate, the front vertical plate, the rear vertical plate and the top plate are connected to form a machine shell cavity, and the laser head and a quick-mounting slag pumping mechanism are arranged in the machine shell cavity; wherein the front vertical plate is also provided with an operation window and a movable door capable of covering the operation window. Spark and smoke generated by cutting can be effectively blocked through the shell, and the use safety of the laser cutting machine is greatly improved.

The invention has the characteristics and advantages, so the invention can be applied to the quick-assembly slag-pumping mechanism with the pipe clamp and the laser cutting machine.

Drawings

FIG. 1 is a schematic axial view of a laser cutting machine to which the present invention is applied;

FIG. 2 is a schematic view of a front view direction cross-sectional structure of a laser cutting machine to which the technical solution of the present invention is applied;

FIG. 3 is a schematic cross-sectional structure view of the fast-assembly slag pumping mechanism;

FIG. 4 is a schematic axial view of the clamp;

fig. 5 is a schematic sectional view of the pipe clamp.

Detailed Description

The following further describes the structure of the fast-assembly slag-pumping mechanism with the pipe clamp and the laser cutting machine applying the technical scheme of the invention with the accompanying drawings.

As shown in fig. 1 and 2, the laser cutting machine includes a main frame 11, a laser generator 12 and a pipe conveying device 13, wherein the laser generator 12 and the pipe conveying device 13 are mounted on the main frame 11, the pipe conveying device 13 is used for clamping a pipe to be cut and driving the pipe to rotate, a laser head 8 is mounted on the laser generator 12, and the laser head 8 is used for emitting a high-temperature laser beam to cut the pipe; when cutting, the high temperature laser beam that laser head 8 jetted out shines on tubular product through high temperature rapid melting tubular product wall body, thereby send tub device 13 to drive tubular product rotation simultaneously and realize cutting the tubular product of different shapes. The laser cutting machine further comprises a slide rail 14, a fixing clamp 2 and a quick-assembly slag pumping mechanism 3, wherein the slide rail 14 is arranged on the main frame 11 and is arranged along the axial direction. The quick-assembly slag pumping mechanism 3 comprises a pipe clamp 4 and a slag pumping pipe 5, a side wall notch 51 used for pumping smoke dust and spark welding slag is arranged at the front end of the slag pumping pipe 5, the fixing clamp 2 is used for clamping the pipe clamp 4 of the quick-assembly slag pumping mechanism 3, and the pipe clamp 4 can clamp the slag pumping pipe 5.

The laser head 8 generates extremely high temperature sparks when performing laser cutting on the pipe, if the pipe is exposed and cut easily, accidents can occur, the further technical scheme can also be that the laser cutting machine further comprises a machine shell 15 arranged on the main frame, the machine shell comprises a left vertical plate 151, a right vertical plate 152, a front vertical plate 153, a rear vertical plate 154 and a top plate 155, the left vertical plate 151, the right vertical plate 152, the front vertical plate 153, the rear vertical plate 154 and the top plate 155 are connected to form a machine shell cavity 150, and the laser head 8 and the fast-assembled slag pumping mechanism 3 are arranged in the machine shell cavity 150; therefore, sparks and smoke generated by cutting can be effectively blocked through the machine shell 15, and the use safety of the laser cutting machine is greatly improved. An operation window and a movable door 157 which can be covered on the operation window are also arranged on the front vertical plate 153, so that the convenience of installation or adjustment of the laser head 8 and the fast-assembly slag pumping mechanism 3 is greatly improved; furthermore, in order to facilitate observation of the working states of the laser head 8 and the fast-assembly slag-pumping mechanism 3, an observation window and a transparent separation blade 158 may be further disposed on the movable door 157.

Because a large amount of smoke and welding slag are generated during cutting, in order to reduce the influence on the processing quality of the pipe caused by the diffusion or the falling of the welding slag into the cut pipe, the fixing clamp 2 can drive the slag extracting pipe 5 to move back and forth relative to the laser head 8 so as to enable the side wall notch 51 of the slag extracting pipe 5 to move to a position right opposite to the laser head 8, and when the cutting is carried out, the slag extracting pipe 5 can extend into the cut pipe and enable the side wall notch 51 of the slag extracting pipe 5 to move to a position right opposite to the laser head 8. Further, laser cutting machine still includes outside air exhaust mechanism, outside air exhaust mechanism includes suction tube 6 and fan 7, 6 one end of suction tube is connected 4 other ends of pipe clamp are connected fan 7, thus, fan 7 extracts the air in suction tube 6 and the scum pipe 5 thereby the lateral wall opening 51 of scum pipe 5 forms great suction force, and the smoke and dust and the welding slag that produce during the cutting are followed under the effect of suction force lateral wall opening 51 enters into the scum pipe 5 and is passed through the scum pipe 5 is arranged away. Further, in order to protect the fan 7 and facilitate cleaning of welding slag, a filtering device 61 may be further disposed between the pipe clamp 4 and the fan 7, a filtering net 62 is disposed in the filtering device 61, and the welding slag passing through the filtering device can be filtered by the filtering net 62.

Because the pipe clamp 4 and the slag extraction pipe 5 in the prior art are welded together, the pipe clamp and the slag extraction pipe need to be replaced together during replacement, but the replaced outer suction pipe and the replaced fixing sleeve cannot be reused generally, which causes certain resource waste. In order to improve the utilization rate of the pipe clamp 4 and the slag extraction pipe 5 and reduce production waste and further simplify the installation and connection structure of the pipe clamp 4 and the slag extraction pipe 5, as shown in fig. 2 to 5, the slag extraction pipe 5 in the technical scheme of the invention can be inserted into the pipe clamp 4 and also can be pulled out and separated from the pipe clamp 4. The pipe clamp 4 is cylindrical and has a mounting through hole 40 arranged along the axial direction, and the pipe clamp 4 comprises a front clamping part 41 and a rear connecting part 42 which are jointed together in a front-rear mode. Wherein the mounting through hole 40 is a passage space defined by the wall body of the pipe clamp 4 and arranged along the axial direction, the mounting through hole 40 penetrates through the front clamping part 41 and the rear connecting part 42 of the pipe clamp, and the mounting through hole 40 can accommodate the slag extracting pipe 5 for extracting smoke and welding slag. The front clamping part 41 is provided with at least 2 strip-shaped cracks 410 along the axial direction, and the strip-shaped cracks 410 penetrate through the installation through hole 40 and break through the front end of the front clamping part 41; the rear end of the front clamping portion 41 is connected to the rear connecting portion 42, the front end of the front clamping portion 41 is suspended, as shown in fig. 4, 4 long slits 410 are formed in the front clamping portion 41, so that the front clamping portion 41 forms at least 4 cantilevers capable of swinging, and thus the front clamping portion 41 allows the slag extraction pipe 5 to be inserted into the installation through hole 40 or pulled out from the installation through hole 40 in a natural state, and when the fixing clip 2 radially tightens the front clamping portion 41, the cantilevers of the front clamping portion 41 can swing into the installation through hole 40 so that the front clamping portion 41 clamps the slag extraction pipe 5 inserted into the installation through hole 40 to play a tightening and clamping role.

In order to adapt to the processing environment, the pipe clamp 4 is generally made of a material with a relatively high rigidity, such as iron, aluminum, or copper, which makes it difficult for the cantilever-shaped front clamping portion 41 to swing, and in order to improve the swing clamping capability of the front clamping portion 41, a further technical solution may be that the axial length of the front clamping portion 41 in the axial direction is greater than the axial length of the rear connecting portion 42, so that the long front clamping portion 41 can swing relatively easily, which is beneficial to improve the clamping effect of the front clamping portion 41.

Factors influencing the elastic deformation of the front clamping portion 41 include the length of the arm body and the width of the arm body, for example, the circumferential width of the elongated slit 410 can be increased to reduce the circumferential width of each arm body of the front clamping portion 41, but the contact area between the front clamping portion 41 and the slag extraction pipe 5 can be reduced while the circumferential width of each arm body of the front clamping portion 41 is reduced as a whole; further, according to a further technical solution, a close region of the front clamping portion 41 close to the rear connecting portion 42 is provided with a local expanding slit 411, one local expanding slit 411 is connected with one long slit 410, and a circumferential width of the local expanding slit 411 is larger than a circumferential width of the long slit 410. The local expanding gap 411 enables the circumferential width of each arm root of the front clamping part 41 to be smaller than the circumferential width of the front end part of the arm, so that the elastic deformation capacity of the front clamping part 41 is improved, and meanwhile, the connecting area of the front clamping part 41 and the slag extracting pipe 5 is ensured, so that the clamping capacity of the pipe clamp 4 is improved.

The factors influencing the elastic deformation of the front clamping part 41 also include the thickness of the arm body, and the further technical scheme can be that the close area is arranged in a concave shape. As shown in fig. 3 and 4, the recess is simultaneously disposed on the outer surface of the front clip part 41 and the inner surface of the front clip part 41. In this way, the elastic deformability of the front clamp 41 is improved by reducing the thickness of the cantilever root of the front clamp 41, thereby further improving the clamping capability of the pipe clamp 4.

On the other hand, the pipe clamp 4 is used for clamping the slag extracting pipe 5 and is also a component for connecting an external air extracting mechanism, and in order to enhance the connecting capability of the pipe clamp 4, the outer side wall of the rear connecting part 42 can be in a pagoda shape. The pagoda-shaped structure is a 2-layer or multi-layer continuous conical structure formed on the outer side wall of the rear connecting part 42, one end with a smaller conical diameter faces the rear end of the rear connecting part 42, the other end with a larger conical diameter faces the front clamping part 41, the structure is favorable for the pipe clamp 4 and the suction pipe 6 to be plugged into each other, and the pagoda-shaped wall body forms a similar barb structure so as to be favorable for enhancing the connection strength of the rear connecting part 42 and the suction pipe 6.

Although the pipe clamp 4 and the slag extraction pipe 5 are matched in shape, in order to facilitate assembly, a certain gap is left between the pipe clamp 4 and the slag extraction pipe 5, and when the suction pipe 6 performs suction, if external air enters the slag extraction pipe 5 from the gap between the slag extraction pipe 5 and the pipe clamp 4, the suction force of the side wall notch 51 of the slag extraction pipe 5 is weakened. In order to improve the suction force of the sidewall gap 51 of the slag extraction pipe 5, as shown in fig. 2 to 5, a further technical solution may be that an annular groove 420 is provided on the inner sidewall of the rear connection portion 42, the annular groove 420 is used for placing an annular sealing ring 9, the annular sealing ring 9 has a shape matching the annular groove 420 and the slag extraction pipe 5, and is placed in the annular groove 420 and is not easy to fall off; when the slag extracting pipe 5 is inserted into the mounting through hole 40, the annular sealing ring 9 is sleeved on the periphery of the slag extracting pipe 5 so as to seal a mounting gap between the outer wall of the slag extracting pipe 5 and the inner side wall of the pipe clamp 4. Therefore, the air tightness of the slag pumping pipe 5 of the pipe clamp 4 is improved by arranging the annular sealing ring 9 between the outer peripheral wall of the slag pumping pipe 5 and the inner peripheral wall of the rear pipe clamp 4, and the pumping capacity of the slag pumping mechanism 3 is greatly improved.

As shown in fig. 3, a further technical solution may also be that a chamfer 52 is provided at the rear end of the slag extraction pipe 5, which not only enables the slag extraction pipe 5 to be smoothly inserted into the annular seal ring 9, but also reduces the sharp corner from scratching the annular seal ring 9. The rear end of the slag extracting pipe 5 is not only inserted into the front clamping part 41 of the pipe clamp 4, but also continuously inserted into the rear connecting part 42, and even further passes through the mounting through hole 40 to extend to the rear of the pipe clamp 4, wherein the slag extracting pipe 5 passes through the mounting through hole 40 to enable the slag extracting pipe 5 to have a longer length, when excessive welding slag is accumulated at the front end of the slag extracting pipe 5, part of the front end of the slag extracting pipe 5 can be cut off, the side wall notch 51 can be machined again, and the slag extracting pipe 5 can still be continuously used after being inserted into the pipe clamp 4.

The side wall notch 51 is an opening for sucking smoke dust and welding slag, and the side wall notch 51 may be a through hole on the front end pipe wall of the slag extracting pipe 5, and a certain distance is left between the through hole and the front end opening of the slag extracting pipe 5; as shown in fig. 2 and 3, the sidewall notch 51 may also be an elongated notch and communicate with the front end port of the slag tapping pipe 5; however, in such an arrangement, the side wall notch 51 may be too close to the front end port of the slag extracting pipe 5, and although the front end port of the slag extracting pipe 5 can also achieve the purpose of suction together with the side wall notch 51, the suction effect of the quick slag extracting mechanism 3 is adversely affected due to the large area of the suction port, for this reason, a further technical solution may be that the front end portion of the slag extracting pipe 5 is provided with a blocking cover 53 for blocking the front end port of the slag extracting pipe 5, and the blocking cover 53 covers the front end port of the slag extracting pipe 5, but does not completely block the side wall notch 51 so as to make the side wall notch 51 serve as a main suction port, which greatly improves the suction force at the side wall notch 51 of the quick slag extracting mechanism 3. Further, the blocking cover 53 can be detachably connected to the slag extraction pipe 5, so that the blocking cover 53 can be reused when the slag extraction pipe 5 is repaired or replaced.

Claims

1. The special pipe clamp of the fast-assembly slag pumping mechanism for laser cutting is characterized in that the pipe clamp is columnar and is provided with an axial installation through hole, the pipe clamp comprises a front clamping part and a rear connecting part which are connected together in a front-rear mode, the front clamping part is provided with at least 2 strip-shaped cracks in the axial direction, and the strip-shaped cracks penetrate through the installation through hole and break through the front end of the front clamping part so that the pipe clamp can play a role in tightening and clamping when the front clamping part is tightened in the radial direction; and an annular groove for placing the annular sealing ring is formed in the inner side wall of the rear connecting part.

2. Pipe clamp according to claim 1, characterized in that the axial length of the front clamp part in the axial direction is greater than the axial length of the rear connecting part.

3. A pipe clamp as defined in claim 1, wherein close proximity areas of said front clamp portion adjacent said rear connection portion are provided with locally enlarged splits, one of said locally enlarged splits engaging one of said elongated splits, said locally enlarged splits having a circumferential width greater than a circumferential width of said elongated splits.

4. Pipe clamp according to claim 3, characterized in that the approach area is arranged concavely.

5. Pipe clamp according to claim 1, characterized in that the outer side wall of the rear connecting part is cone-shaped.

6. A fast-assembly slag pumping mechanism is characterized by comprising a slag pumping pipe and the pipe clamp as claimed in any one of claims 1 to 5, wherein a side wall notch is formed in the pipe wall of the front end of the slag pumping pipe, and the rear end of the slag pumping pipe is inserted into the mounting through hole; still including setting up annular seal in the annular, work as it pegs graft to take out the sediment pipe when in the mounting hole, annular seal cover is in thereby take out the periphery of sediment pipe can seal take out the sediment pipe with installation clearance between the pipe clamp, when radially tightening up preceding clamp time preceding clamp can grasp take out the sediment pipe.

7. The quick-assembly slag pumping mechanism according to claim 6, wherein a plugging cover for plugging a front end port of the slag pumping pipe is arranged at the front end of the slag pumping pipe.

8. The quick-assembly slag pumping mechanism according to claim 6 or 7, characterized in that a chamfer is arranged at the rear end of the slag pumping pipe.

9. A laser cutting machine comprises a main frame and a laser head, wherein the laser head is used for emitting laser beams to cut pipes; the slag extractor is characterized by further comprising a slide rail arranged on the main rack, a fixing clamp arranged on the slide rail in a sliding mode and the quick-assembly slag extracting mechanism according to any one of claims 6 to 8, wherein the fixing clamp is used for clamping a pipe clamp of the quick-assembly slag extracting mechanism so that a front clamping part of the pipe clamp clamps the slag extracting pipe, and the fixing clamp can drive the slag extracting pipe to move back and forth relative to the laser head so that a side wall gap of the slag extracting pipe can move to a position right opposite to the laser head.

10. The laser cutting machine according to claim 9, further comprising a suction pipe and a blower, wherein one end of the suction pipe is connected to the rear connecting portion of the pipe clamp, and the other end of the suction pipe is connected to the blower.

11. The laser cutting machine according to claim 9 or 10, further comprising a casing disposed on the main frame, wherein the casing comprises a left vertical plate, a right vertical plate, a front vertical plate, a rear vertical plate and a top plate, the left vertical plate, the right vertical plate, the front vertical plate, the rear vertical plate and the top plate are connected to form a casing cavity, and the laser head and the fast-assembling slag-extracting mechanism are disposed in the casing cavity; wherein the front vertical plate is also provided with an operation window and a movable door capable of covering the operation window.