Composite pipe assembly equipment

Abstract

The invention discloses composite pipe assembly equipment, relates to the technical field of composite pipe assembly, and aims to solve the problems of poor forming quality and low production efficiency of a bimetal composite pipe caused by the fact that manual operation is needed and grinding and sleeving of an inner pipe and an outer pipe are carried out step by step when the bimetal composite pipe is assembled at present. Comprising a first grinding device, a second grinding device, a conveying device and an assembling device; wherein the conveying device is located between the first polishing device and the second polishing device, the conveying device comprises a conveying frame body and two parallel conveying rails, the conveying rails are movably arranged on the conveying frame body, and the moving directions of the two conveying rails are both perpendicular to the axial direction of the first pipe and the axial direction of the second pipe; the assembling device is provided with two ends which are located on the two opposite sides of the two conveying rails respectively, a pushing component is arranged on the assembling device, and the pushing component is used for pushing the first pipe and the second pipe which are located on the two conveying rails respectively in the axial direction of the first pipe and the second pipe, so that the first pipe and the second pipe are nested to form the composite pipe.

Description

Technical Field

[0001] The invention relates to the technical field of composite tube assembly, and in particular to composite tube assembly equipment. Background Art

[0002] Seamless bimetallic composite pipes have the superior performance of each component metal pipe, and at the same time can avoid the excessive use of rare metals and precious metal materials to a certain extent, greatly reducing production costs. They have huge potential market application value and are therefore widely used in aerospace, oil extraction, chemical corrosive media transportation, military industry, nuclear power and other fields.

[0003] At present, there are mainly the following methods for producing bimetallic composite pipes: explosive composite method, drawing composite method and three-roller oblique rolling method. The three-roller oblique rolling process is a rolling process with local loading and axial continuous forming. The formed bimetallic composite pipe has the characteristics of high bonding strength and high production efficiency. Therefore, the three-roller oblique rolling seamless bimetallic composite pipe has become one of the most promising seamless metal composite pipe preparation technologies.

[0004] The three-roller cross-rolling bimetallic composite tube assembly process has a key impact on the forming performance of the bimetallic composite tube. In the current existing technology, the bimetallic composite tube assembly process is generally manually operated and the inner and outer tube grinding and assembly are carried out step by step. This assembly method will undoubtedly reduce the forming quality stability and production efficiency of the bimetallic composite tube. Therefore, it is urgent to develop a special equipment for bimetallic composite tube assembly. Summary of the invention

[0005] The purpose of the present invention is to provide a composite tube assembly device to solve the problem that the current bimetallic composite tube assembly requires manual operation and the inner and outer tube grinding and assembly are carried out step by step, which leads to poor forming quality and low production efficiency of the bimetallic composite tube.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A composite tube assembly device, comprising: a first polishing device, the first polishing device being used to polish the inner wall of the first tube and transport the first tube; a second grinding device, the second grinding device being used to grind the outer wall of the second tube and transport the second tube; A transmission device, the transmission device is located between the first grinding device and the second grinding device, the transmission device includes a transmission frame and two transmission tracks parallel to each other, the transmission tracks are movably arranged on the transmission frame, the two transmission tracks are used to carry the first tube and the second tube respectively and drive the first tube and the second tube to move, and the moving directions of the two transmission tracks are perpendicular to the axial directions of the first tube and the second tube; The blank assembling device has two ends respectively located on opposite sides of the two transmission tracks. The blank assembling device is provided with a pushing component, which is used to push the first tube and the second tube respectively located on the two transmission tracks along the axial direction of the first tube and the second tube, so that the first tube and the second tube are nested to form a composite tube blank.

[0007] Optionally, in the above-mentioned composite tube assembly equipment, the transmission device includes two transmission units, each transmission unit includes a transmission frame and a transmission track, and the two transmission units are arranged relatively parallel and located between the first grinding device and the second grinding device.

[0008] Optionally, in the above composite tube assembly equipment, the transmission unit further comprises: A first screw slider mechanism, the first screw slider mechanism is fixedly arranged on the transmission frame, the first screw slider mechanism comprises a screw and a first slider movable along the screw, and the moving direction of the first slider is perpendicular to the axial direction of the first tube and the second tube; A lifting component, one end of which is fixedly arranged on the first slider, and the other end of which is fixedly connected to the transmission track; The support platform is fixedly arranged on the transmission frame, and the support platform is located above the transmission track, and is used to receive the first tube and the second tube respectively from the first grinding device and the second grinding device.

[0009] Optionally, in the above-mentioned composite tube assembly equipment, a plurality of groups of limiting grooves are provided on the transmission track, and the plurality of groups of limiting grooves are arranged along an axial direction perpendicular to the first tube and the second tube, and the limiting grooves are used to accommodate and limit the first tube and the second tube.

[0010] Optionally, in the above composite tube assembly equipment, the assembly device includes: An assembly bracket, the two ends of which are respectively located on opposite sides of two transmission tracks; Two second screw slider mechanisms are arranged in parallel on the blank assembly support. The two second screw slider mechanisms include two second sliders. The moving direction of the two second sliders is perpendicular to the moving direction of the transmission track. The second slider has a pushing end, which is used to push the first tube and the second tube respectively located on the two transmission tracks, so that the first tube and the second tube are nested to form a composite tube blank.

[0011] Optionally, in the above composite tube assembly equipment, the first grinding device includes: First, polish the bracket; Two first support rollers are arranged side by side; one of the first support rollers is rotatably arranged on the first grinding bracket, and the other first support roller is fixedly arranged on the first grinding bracket, the axis of the rotatably arranged first support roller is inclined relative to the horizontal plane, and the two first support rollers are used to place the first tube and move the first tube to the transmission track adjacent to the first support rollers; A first driving motor, wherein a driving end of the first driving motor is connected to the first supporting roller and is used to drive the first supporting roller to rotate; A clamping assembly, the clamping assembly is fixedly connected to the grinding bracket, the clamping assembly has a clamping end located above the first support roller and movable along the direction of the first support roller, and the clamping end is used to fix the relative position of the first tube and the first grinding bracket; A first grinding table, the first grinding table is movably arranged on the first grinding bracket in a direction close to or away from the first supporting roller; A first grinding motor, the first grinding motor is fixedly mounted on the first grinding table; The first grinding component is fixedly arranged at the driving end of the first grinding motor and is used for grinding the inner wall of the first tube.

[0012] Optionally, in the above composite tube assembly equipment, the pressing component includes: A pressing platform, which is fixed on one side of the grinding bracket; A pressing motor, which is fixedly arranged on the pressing platform; The pulley is fixed on the driving end of the pressing motor, and the pressing motor is used to press the pulley down to contact with the first tube.

[0013] Optionally, in the above composite tube assembly equipment, the second grinding device includes: Second grinding bracket; Two second support rollers, one of which is rotatably disposed on the second polishing bracket, and the other second support roller is fixedly disposed on the second polishing bracket, the axis of the rotatably disposed second support roller is inclined relative to the horizontal plane, and the two second support rollers are used to place the second tube and move the second tube to a transmission track adjacent to the second support rollers; A second driving motor, wherein a driving end of the second driving motor is connected to the second supporting roller and is used for driving the second supporting roller to rotate; A second grinding table, the second grinding table is arranged on the second grinding bracket so as to move in a direction close to or away from the second supporting roller; A second grinding motor, the second grinding motor is fixedly mounted on the second grinding table; The second grinding component is fixedly connected to the driving end of the second grinding motor and is used for grinding the outer wall of the second tube.

[0014] Optionally, in the above-mentioned composite tube assembly equipment, the composite tube assembly equipment also includes a welding device, the two ends of the welding device are respectively located on opposite sides of the transmission device, the welding device includes a welding bracket and two oppositely arranged welding components, the welding component is moved along a direction perpendicular to the transmission track and is arranged on the welding bracket, the welding component has a welding part that can be moved in the horizontal and vertical directions, and the welding part is used to weld the two ends of the composite tube blank respectively.

[0015] Optionally, in the above-mentioned composite tube assembly equipment, the composite tube assembly equipment further includes two conveying devices, which are respectively located between the first grinding device and the transmission track and between the second grinding device and the transmission track, and the conveying devices include: Conveyor rack; A plurality of V-shaped pulleys, which are arranged at intervals on the conveying frame, and the V-shaped pulleys are used to convey the first tube or the second tube; The conveying motor is fixed on the conveying frame, and the driving end of the conveying motor is transmission-connected with a plurality of V-type pulleys for driving the V-type pulleys to rotate.

[0016] Compared with the prior art, in the composite tube blanking equipment provided by the present invention, when the composite tube blanking is performed, the first tube is first placed in the first grinding device, and the first grinding device grinds its inner wall; at the same time, the second tube is placed in the second grinding device, and the second grinding device grinds its outer wall. After the grinding, the first tube and the second tube are respectively transported to the two transmission tracks of the transmission device. Since the transmission track is movably arranged on the transmission frame, and the moving direction is perpendicular to the axial direction of the first tube and the second tube, the transmission track drives the first tube and the second tube to move, transports them to the vicinity of the blanking device, and completes the transfer of materials from the grinding device to the blanking device. When the first tube and the second tube are transferred to the corresponding position of the blanking device, the pushing component on the blanking device starts to work. The pushing component pushes the first tube and the second tube respectively located on the two transmission tracks along the axial direction of the first tube and the second tube, so that the first tube and the second tube are close to each other and nested together, and finally form a composite tube, completing the entire composite tube blanking process. While improving the molding quality of the composite tube, the production efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the overall structure of a composite tube assembly device proposed in an embodiment of the present invention; Figure 2 It is a structural schematic diagram of a first grinding device of a composite tube assembly equipment proposed in an embodiment of the present invention; Figure 3 It is a structural schematic diagram of a second grinding device of a composite tube assembly equipment proposed in an embodiment of the present invention; Figure 4 It is a structural schematic diagram of an assembly device of a composite tube assembly equipment proposed in an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a transmission device of a composite tube assembly equipment proposed in an embodiment of the present invention; Figure 6 It is a schematic diagram of the coordination of a transmission device and an assembling device of a composite tube assembling device proposed in an embodiment of the present invention; Figure 7 It is a structural schematic diagram of a welding device of a composite tube assembly equipment proposed in an embodiment of the present invention; Figure 8 It is a schematic diagram of an enlarged view of a welding device of a composite tube assembly equipment proposed in an embodiment of the present invention; Fig. 9 It is a schematic structural diagram of a conveying device of a composite tube assembly equipment proposed in an embodiment of the present invention.

[0018] Reference numerals: 1 is a first grinding device, 110 is a first grinding bracket, 120 is a first supporting roller, 130 is a first driving motor, 140 is a pressing assembly, 141 is a pressing table, 142 is a pressing motor, 143 is a pulley, 150 is a first grinding table, 160 is a first grinding motor, 170 is a first grinding component, 2 is a second grinding device, 210 is a second grinding bracket, 220 is a second supporting roller, 230 is a second driving motor, 240 is a second grinding table, 250 is a second grinding motor, 260 is a second grinding component, 3 is a transmission device, 310 is a transmission unit, 3110 is a transmission frame, 3120 is a transmission frame, 3121 is a transmission track, 3130 is a first screw slider mechanism, 3131 is a first slider, 3140 is a lifting component, 3150 is a support table, 4 is a blank assembly device, 410 is a blank assembly bracket, 420 is a second screw slider mechanism, 4210 is a second slider, 4211 is a pushing end, 5 is a welding device, 510 is a welding bracket, 520 is a welding assembly, 521 is a welding part, 5210 is a welding slide, 5211 is a first welding screw slider mechanism, 5212 is a second welding screw slider mechanism, 6 is a conveying device, 610 is a conveying frame, 620 is a V-type pulley, and 630 is a conveying motor. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0022] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] See also Figure 1 and Figure 6The composite tube blank assembly equipment provided by the embodiment of the present invention includes: a first grinding device 1, a second grinding device 2, a transmission device 3 and a blank assembly device 4; wherein the first grinding device 1 is used to grind the inner wall of the first tube and transport the first tube; the second grinding device 2 is used to grind the outer wall of the second tube and transport the second tube; the transmission device 3 is located between the first grinding device 1 and the second grinding device 2, the transmission device 3 includes a transmission frame 3110 and two transmission tracks 3120 parallel to each other, the transmission tracks 3120 are movably arranged on the transmission frame 3110, the two transmission tracks 3120 are used to carry the first tube and the second tube respectively and drive the first tube and the second tube to move, and the moving directions of the two transmission tracks 3120 are perpendicular to the axial directions of the first tube and the second tube; the blank assembly device 4 has two ends respectively located on opposite sides of the two transmission tracks 3120, and a pushing component is arranged on the blank assembly device 4, and the pushing component is used to push the first tube and the second tube respectively located on the two transmission tracks 3120 along the axial directions of the first tube and the second tube, so that the first tube and the second tube are nested to form a composite tube blank.

[0025] For specific implementation: please refer to Figure 1 and Figure 6 First, the first tube is placed in the first grinding device 1, and the first grinding device 1 grinds its inner wall; at the same time, the second tube is placed in the second grinding device 2, and the second grinding device 2 grinds its outer wall. After grinding, the first tube and the second tube are transported to the two transmission tracks 3120 of the transmission device 3 respectively. Since the transmission track 3120 is movably arranged on the transmission frame 3110, and the moving direction is perpendicular to the axial direction of the first tube and the second tube, the transmission track 3120 drives the first tube and the second tube to move, transports them to the vicinity of the blank assembly device 4, and completes the transfer of materials from the grinding device to the blank assembly device 4. After the first tube and the second tube are transferred to the corresponding position of the blank assembly device 4, the pushing component on the blank assembly device 4 starts to work. The pushing component pushes the first tube and the second tube located on the two transmission tracks 3120 respectively along the axial direction of the first tube and the second tube, so that the first tube and the second tube are close to each other and nested together, and finally form a composite tube, completing the entire composite tube assembly process. While improving the molding quality of the composite tube, the production efficiency is improved.

[0026] As a possible implementation, Figure 5 and Figure 6 As shown, the transmission device 3 includes two transmission units 310, each transmission unit 310 includes a transmission frame 3110 and a transmission track 3120, and the two transmission units 310 are relatively parallel and located between the first grinding device 1 and the second grinding device 2. The two transmission units 310 are respectively close to one end of the first grinding device 1 and the second grinding device 2, ensuring that the first tube or the second tube polished by the first grinding device 1 or the second grinding device 2 can be smoothly transferred to the transmission track 3120.

[0027] In specific implementation, after the first tube has completed inner wall grinding in the first grinding device 1, the transmission unit 310 moves to a suitable position close to the transmission track 3120 of the first grinding device 1 to receive the first tube. At the same time, after the second tube has completed outer wall grinding in the second grinding device 2, it is received by the transmission track 3120 of another transmission unit 310. At this time, since the transmission track 3120 is arranged on the transmission frame 3110 and is movable, the transmission track 3120 moves in a direction perpendicular to the axial direction of the first tube and the second tube, driving the first tube and the second tube carried thereon to move toward the direction of the blank assembly device 4. In this process, the two transmission units 310 work synchronously to ensure that the first tube and the second tube can reach the corresponding position of the blank assembly device 4 at the same time or at the appropriate time, so that the first tube and the second tube are in a coaxial relative position and reach the blank assembly device 4. By arranging two relatively parallel transmission units 310 in this way, each transmission unit 310 has an independent transmission frame 3110 and a transmission track 3120. This independent design makes the spatial layout of the entire transmission device 3 more flexible, and can be reasonably arranged according to the actual situation of the operating space. At the same time, during the maintenance and overhaul of the equipment, each transmission unit 310 can also be operated separately, reducing the difficulty and cost of maintenance.

[0028] Furthermore, if Figure 5 and Figure 6 As shown, the transmission unit 310 also includes a first screw slider mechanism 3130, a lifting component 3140 and a support platform 3150; wherein the first screw slider mechanism 3130 is fixedly arranged on the transmission frame 3110, the first screw slider mechanism 3130 includes a screw and a first slider 3131 movable along the screw, and the moving direction of the first slider 3131 is perpendicular to the axial direction of the first tube and the second tube; one end of the lifting component 3140 is fixedly arranged on the slider, and the other end of the lifting component 3140 is fixedly connected to the transmission track 3120; the support platform 3150 is fixedly arranged on the transmission frame 3110, and the support platform 3150 is located above the transmission track 3120, and is used to receive the first tube and the second tube from the first grinding device 1 and the second grinding device 2 respectively.

[0029] In specific implementation, after the first tube and the second tube have completed the grinding operation, they will be sent to the support platform 3150 of the transmission unit 310, and the support platform 3150 provides an initial support position for the first tube and the second tube. Next, in order to transfer the first tube and the second tube from the support platform 3150 to the transmission track 3120, the lifting component 3140 is started, and the lifting component 3140 drives the transmission track 3120 to rise. When the transmission track 3120 rises to the same horizontal plane as the support platform 3150, it will continue to rise to generate a height difference. This height difference will cause the first tube and the second tube to be transferred from the support platform 3150 to the transmission track 3120 under the action of gravity and the contact between the transmission track 3120. At this time, the screw of the first screw slider mechanism 3130 starts to rotate, driving the first slider 3131 to move. Since the first slider 3131 is fixedly connected to the transmission track 3120, the first slider 3131 moves along the axial direction perpendicular to the first tube and the second tube, transporting the first tube and the second tube to the position required for the assembly process, completing the transmission process of the first tube and the second tube.

[0030] Through the coordinated work of the lifting component 3140, the support platform 3150 and the transfer track 3120, the first tube and the second tube are smoothly transferred from the support platform 3150 to the transfer track 3120, the error and instability in the transfer and transportation process are reduced, and the degree of automation and accuracy of the transfer and transportation of the first tube and the second tube are improved.

[0031] It should be noted that the lifting component 3140 can be a hydraulic cylinder, which is fixedly arranged on the first slider 3131. The pushing end of the hydraulic cylinder is fixedly connected to the transmission rail 3120, which can provide a large thrust, and the movement speed can be controlled by adjusting the flow rate of the hydraulic oil, which can achieve smooth lifting and lowering movement and ensure the smooth transfer of the first tube and the second tube; the lifting component 3140 can be an electric push rod, one end of the electric push rod is connected to the first slider 3131, and the other end is connected to the transmission rail 3120. When the motor is started, the push rod will extend or retract according to the rotation direction of the motor, thereby pushing the transmission rail 3120 up or down; the lifting component 3140 can also be a pneumatic push rod.

[0032] As a possible implementation, Figure 5 As shown, a plurality of groups of limiting grooves 3121 are provided on the transmission track 3120, and the plurality of groups of limiting grooves 3121 are arranged along an axial direction perpendicular to the first tube and the second tube, and the limiting grooves 3121 are used to accommodate and limit the first tube and the second tube.

[0033] A plurality of groups of limiting grooves 3121 are provided on the transmission track 3120, and the arrangement direction of these limiting grooves 3121 is along the direction perpendicular to the axial direction of the first tube and the second tube. The limiting grooves 3121 are used to accommodate and limit the first tube and the second tube. When the first tube and the second tube are placed on the transmission track 3120, they will be embedded in the corresponding limiting grooves 3121, and the limiting grooves 3121 can limit the movement of the first tube and the second tube in the direction perpendicular to their axial direction, ensuring that they maintain a stable position during the transmission process without deviation, shaking, etc.

[0034] Furthermore, a plurality of groups of limiting grooves arranged perpendicular to the axial direction of the first tube and the second tube are also provided on the support platform 3150, that is, during the entire transmission stage of the first tube and the second tube, the first tube and the second tube, whether waiting for transmission on the support platform 3150 or being transported on the transmission track 3120, can be limited in position by the limiting grooves. When the first tube and the second tube are placed on the support platform 3150, they will be placed in the limiting grooves on the support platform 3150, so that they can maintain a stable position while waiting to enter the transmission track 3120, and will not roll or move at will; and when they are transferred from the support platform 3150 to the transmission track 3120, since there are also limiting grooves 3121 arranged in the same direction on the transmission track 3120, the positions can be kept consistent, ensuring the continuity and stability of the entire process.

[0035] In the subsequent assembly process, the precise position of the first tube and the second tube is crucial. The opening of the limit groove 3121 ensures that the first tube and the second tube are always in the same position when they are transferred to each processing station. In the assembly process, only when the first tube and the second tube are accurately in the predetermined position can they be nested to form a composite tube and the quality and accuracy of the composite tube be guaranteed. If the position of the first tube or the second tube is offset during the transmission process, the concentricity of the composite tube may be insufficient, resulting in assembly failure, and the existence of the limit groove 3121 provides a prerequisite for ensuring processing accuracy.

[0036] As a possible implementation, Figure 4 As shown, the blank assembly device 4 includes a blank assembly support 410 and two second screw slider mechanisms 420; wherein, the two ends of the blank assembly support 410 are respectively located on opposite sides of the two transmission tracks 3120; the two second screw slider mechanisms 420 are arranged in parallel on the blank assembly support 410, and the two second screw slider mechanisms 420 include two second sliders 4210, and the moving direction of the two second sliders 4210 is perpendicular to the moving direction of the transmission track 3120. The second slider 4210 has a pushing end 4211, and the pushing end 4211 is used to push the first tube and the second tube respectively located on the two transmission tracks 3120, so that the first tube and the second tube are nested to form a composite tube.

[0037] The blank assembly support 410 is the basic structure of the blank assembly device 4, and its two ends are respectively located on the opposite sides of the two transmission tracks 3120. This design allows the blank assembly support 410 to span over the two transmission tracks 3120, providing a support platform for subsequent blank assembly operations. Two second screw slider mechanisms 420 are arranged in parallel on the blank assembly support 410. Each second screw slider mechanism 420 includes a second slider 4210. The moving direction of these second sliders 4210 is perpendicular to the moving direction of the transmission track 3120. When the second screw slider mechanism 420 is working, the second slider 4210 will move in a direction perpendicular to the moving direction of the transmission track 3120. And the second slider 4210 has a pushing end 4211, and the function of this pushing end 4211 is to push the first tube and the second tube respectively located on the two transmission tracks 3120. Through the action of the pushing end 4211, the first tube and the second tube can move toward each other, and finally nest together to form a composite tube.

[0038] In specific implementation, the first tube and the second tube are transported to the lower position of the blank assembly device 4 on the two transmission tracks 3120 respectively. At this time, due to the limiting structure (such as the limiting groove 3121 mentioned above) on the transmission track 3120, their positions are relatively fixed. When the first tube and the second tube reach the predetermined position, the blank assembly device 4 starts to work, and the screws in the two second screw slider mechanisms 420 start to rotate. The rotation of the screw drives the second slider 4210 matched therewith to move in a straight line perpendicular to the moving direction of the transmission track 3120. As the second slider 4210 moves, its pushing end 4211 gradually approaches and contacts the first tube and the second tube. Since the two second sliders 4210 are arranged in parallel and move simultaneously, their pushing ends 4211 will respectively push the first tube and the second tube to move in the direction close to each other along the transmission track 3120. During the pushing process, the first tube and the second tube will gradually approach until they are nested together to form a composite tube. The entire process can accurately adjust the pushing distance through the precise control of the second screw slider mechanism 420, ensuring that the first tube and the second tube can be closely and accurately nested, thereby ensuring the quality and precision of the composite tube. This layout of the blank assembly support 410 spanning the opposite sides of the two transmission tracks 3120 makes the blank assembly device 4 more stable in structure. This stable structure can withstand the force generated during the pushing process, is not prone to shaking or deformation, and increases the reliability of the entire device.

[0039] Furthermore, if Figure 4As shown, the connecting line of the two pushing ends 4211 is parallel to the axis of the first tube and the second tube, so that during the pushing process, the force applied to the first tube and the second tube at the pushing end 4211 can be evenly and symmetrically distributed. In this way, the first tube and the second tube will not deviate or twist due to uneven force during the process of approaching and nesting each other, thereby improving the concentricity of the composite tube, thereby improving the quality and efficiency of the assembly.

[0040] It should be noted that after the composite tube is nested, the composite tube is located on any single transfer track 3120, so that the transfer track 3120 can be moved to transfer the composite tube to the welding station. In specific implementation, a second slider 4210 can be fixed to one end of the assembly bracket 410, so that one end of the first tube or the second tube is against the fixed second slider 4210, and the other second slider 4210 is moved to push the second tube or the first tube so that the two are nested to form a composite tube. In this way, the composite tube after the assembly is completed can be placed on a certain transfer track 3120, so that it is convenient to transport it to the welding station.

[0041] As a possible implementation, Figure 2 As shown, the first grinding device 1 includes a first grinding bracket 110, two first support rollers 120, a first drive motor 130, a clamping assembly 140, a first grinding table 150, a first grinding motor 160 and a first grinding component 170; wherein; one of the first support rollers 120 is rotatably arranged on the first grinding bracket 110, and the other first support roller 120 is fixedly arranged on the first grinding bracket 110, the axis of the rotatably arranged first support roller 120 is inclined relative to the horizontal plane, and the upper part of the gap between the two first support rollers 120 is used to place the first tube and move the first tube to the transmission track 3120 adjacent to the first support roller 120; the first drive motor 130 0 is connected to the first support roller 120 and is used to drive the first support roller 120 to rotate; the clamping assembly 140 is fixedly connected to the first grinding bracket 110, and the clamping assembly 140 has a clamping end located above the first support roller 120 and movable along the direction of the first support roller 120, and the clamping end is used to fix the relative position of the first tube and the first grinding bracket 110; the first grinding table 150 is arranged on the first grinding bracket 110 so as to move along the direction approaching or moving away from the first support roller 120; the first grinding motor 160 is fixedly arranged on the first grinding table 150; the first grinding component 170 is fixedly arranged at the driving end of the first grinding motor 160 and is used to grind the inner wall of the first tube.

[0042] In the specific implementation, first, the first tube is placed on two first support rollers 120. Since the axis of the first support roller 120 rotatingly arranged on the first grinding bracket 110 is inclined relative to the horizontal plane, and the first support roller 120 is driven to rotate by the first driving motor 130. When the first driving motor 130 is started, the first support roller 120 connected thereto is driven to rotate, and the first tube placed on the first support roller 120 will roll along the inclined surface of the first support roller 120, thereby realizing the movement from the placement position to the transmission track 3120 adjacent to the first support roller 120. After the first tube moves to the appropriate position, the clamping assembly 140 plays a role. The clamping assembly 140 is fixed on the first grinding bracket 110, and its clamping end is located above the first support roller 120 and can move along the direction of the first support roller 120. By adjusting the position of the clamping end, it is contacted with the first tube and a certain pressure is applied, thereby fixing the position of the first tube on the first support roller 120, ensuring that the first tube will not be displaced during the grinding process, and ensuring the stability of the grinding. Then, the first tube is polished. The first polishing table 150 moves on the first polishing bracket 110 in a direction close to or away from the first support roller 120 until the first polishing component 170 can accurately contact the inner wall of the first tube. The first polishing motor 160 is fixed on the first polishing table 150. When the first polishing motor 160 is started, its driving end drives the first polishing component 170 to rotate at a high speed. The rotating first polishing component 170 polishes the inner wall of the first tube. After the polishing is completed, the clamping assembly 140 is first released to release the fixed state of the first tube. Then the first support roller 120 rotates, and the polished first tube is rolled along the inclined surface of the first support roller 120 to the transmission track 3120, and the transmission track 3120 transports it to the next process. In this way, the first tube is placed on the inclined first support roller 120, and the rotation of the first tube can be driven by driving the rotation of the first support roller 120, so that the first tube naturally moves along the inclined direction. Only a small driving force is required to realize efficient transportation of the first tube, which reduces the energy consumption of the equipment and improves the energy utilization efficiency. At the same time, this simple mechanical transmission method makes the inspection and maintenance of the device simple and ensures the production efficiency. In addition, a clamping assembly 140 is arranged above the first support roller 120. When the first tube moves to a specific position, the relative position of the first tube and the first support roller 120 can be selectively fixed by pressing down the clamping assembly 140 or lifting the clamping assembly 140, so that the position of the first grinding table 150 can be further adjusted, and the inner wall of the first tube can be accurately ground in the axial direction. The clamping assembly 140 can ensure that the first tube always maintains a stable position during the grinding process, avoid grinding errors caused by the displacement of the first tube, and improve the uniformity and accuracy of grinding.

[0043] Furthermore, if Figure 2As shown, the clamping assembly 140 includes a clamping platform 141, a pressing motor 142 and a pulley 143; wherein the clamping platform 141 is fixedly arranged on one side of the grinding bracket; the pressing motor 142 is fixedly arranged on the clamping platform 141; the pulley 143 is fixedly arranged on the driving end of the pressing motor 142, and the pressing motor 142 is used to press the pulley 143 down to contact with the first tube.

[0044] The clamping assembly 140 is mainly composed of three parts: a clamping platform 141, a pressing motor 142 and a pulley 143. The clamping platform 141 plays the role of basic support and installation. The clamping platform 141 is fixedly installed on one side of the first grinding bracket 110, providing a mounting carrier for the pressing motor 142 and the pulley 143. The pressing motor 142 is fixed on the clamping platform 141, and the pulley 143 can be pressed down to make it contact with the first tube. When the pulley 143 contacts the first tube, a downward pressure will be generated on the first tube. This pressure can press the first tube tightly against the first support roller 120, thereby fixing the relative position of the first tube and the first support roller 120, and meeting the stability requirements when the inner wall of the first tube is subsequently polished.

[0045] In specific implementation, before the first tube is placed on the first support roller 120 and moved to a specific position, the pulley 143 of the clamping assembly 140 is at a higher position and will not interfere with the first tube, ensuring that the first tube can move smoothly on the first support roller 120. When the first tube moves to the predetermined grinding position, the pressing motor 142 is started, and its driving end drives the pulley 143 to move downward. As the pulley 143 descends, the pulley 143 gradually contacts the surface of the first tube. Due to the friction between the pulley 143 and the first tube, when the pulley 143 continues to press down, a downward pressure will be generated on the first tube, and this pressure is transmitted to the first support roller 120 through the first tube, so that the first tube is tightly fixed on the first support roller 120, limiting the displacement and shaking of the first tube during the grinding process. After the first tube is fixed, the first grinding table 150 can be adjusted as needed, and then the first grinding motor 160 drives the first grinding component 170 to grind the inner wall of the first tube. During the entire grinding process, the pressing motor 142 continues to work, maintaining the pressure of the pulley 143 on the first tube, ensuring that the first tube is always in a stable fixed state. When the inner wall of the first tube is polished, the pressing motor 142 reverses, and the driving end drives the pulley 143 to move upward, so that the pulley 143 is separated from the first tube, and the fixation of the first tube is released so that the first tube can be transported to the next process. In this way, by operating the pressing motor 142, the pressing stroke and speed of the pulley 143 can be accurately controlled, and the pressure applied by the pulley 143 to the first tube can be accurately controlled. Different pressures can be used for pipes of different materials. Smaller pressure can avoid damage to the pipe, and larger clamping force can ensure the stability of the pipe during the grinding process, thereby ensuring the grinding quality. At the same time, the design of the contact between the pulley 143 and the first tube can effectively reduce the wear on the surface of the first tube compared to some rigid clamping structures. The pulley 143 has rolling friction with the first tube during the rotation process, which not only reduces the wear on the surface of the first tube, but also reduces the energy consumption of the clamping assembly 140 when it is working, compared to the sliding friction of some rigid clamping structures. At the same time, due to the rolling characteristics of the pulley 143, the impact force on the first tube is small during the clamping and loosening process, which further protects the surface quality and structural integrity of the first tube.

[0046] As a possible implementation, Figure 3As shown, the second grinding device 2 includes a second grinding bracket 210, two second support rollers 220, a second drive motor 230, a second grinding table 240, a second grinding motor 250 and a second grinding component 260; wherein, one of the second support rollers 220 is rotatably arranged on the second grinding bracket 210, and the other second support roller 220 is fixedly arranged on the second grinding bracket 210, and the axis of the second support roller 220 rotatably arranged on the second grinding bracket 210 is inclined relative to the horizontal plane, and the upper parts of the two second support rollers 220 are used to place the second tube and move the second tube to the transmission track 3120 adjacent to the second support rollers 220; the second grinding table 240 is movably arranged on the second grinding bracket 210 in a direction close to or away from the second support roller 220; the second grinding motor 250 is fixedly arranged on the second grinding table 240; the second grinding component 260 is fixedly connected to the driving end of the second grinding motor 250, and is used to grind the outer wall of the second tube.

[0047] The second grinding bracket 210 is the basic structure of the second grinding device 2, which plays the role of supporting and fixing other components, and provides a stable platform for the entire grinding process. Other components such as the second support roller 220, the second grinding table 240, the second grinding motor 250, etc. are installed on it. Two second support rollers 220 are set on the second grinding device 2, one is rotatably mounted on the second grinding bracket 210, and the other is fixed on the bracket. The axes of the two second support rollers 220 are inclined relative to the horizontal plane. The upper part of the gap is used as the placement position of the second tube, and driven by the rotating second support roller 220, the second tube can move along the inclined support roller surface and finally be transported to the transmission track 3120 adjacent to the second support roller 220, realizing the transmission function of the second tube. The second grinding table 240 can move on the second grinding bracket 210 in the direction close to or away from the second support roller 220. This movable design enables it to flexibly adjust the distance between it and the second tube to meet the outer wall grinding requirements of the second tube. The second grinding motor 250 is fixedly mounted on the second grinding table 240 to provide rotational power for the second grinding component 260. The second grinding component 260 is connected to the driving end of the second grinding motor 250, and rotates under the drive of the second grinding motor 250 to directly contact the outer wall of the second tube and grind it.

[0048] In the specific implementation, firstly, the second tube is placed in the upper part of the gap between the two second support rollers 220. Since one of the second support rollers 220 is driven to rotate by the second drive motor 230, the second tube will roll along the inclined support roller surface by friction, thereby realizing the movement from the placement position to the transmission track 3120 adjacent to the second support roller 220. After the second tube is transferred to the appropriate position, the position of the second grinding table 240 is adjusted. By moving the second grinding table 240, the second grinding motor 250 and the second grinding component 260 installed thereon are made to reach a suitable distance from the outer wall of the second tube. When the second grinding table 240 is adjusted in place, the second grinding motor 250 is started, and the driving end of the second grinding motor 250 drives the second grinding component 260 to rotate at a high speed. The rotating second grinding component 260 grinds the outer wall of the second tube. During the grinding process, the outer wall of the second tube is fully grinded as the second tube moves on the second support roller 220. After the grinding is completed, the second tube continues to roll along the inclined second support roller 220 to the transfer track 3120, and is transported to the next process by the transfer track 3120.

[0049] With such arrangement, the movable design of the second grinding table 240 enables the second grinding component 260 to accurately adjust the contact position and grinding force with the outer wall of the second tube. By adjusting the relative position of the second grinding table 240 and the second tube, it is ensured that the second grinding component 260 can evenly grind the entire outer wall, thereby improving the uniformity and accuracy of grinding. At the same time, the second tube is placed on the inclined second support roller 220, and the rotation of the second support roller 220 can be driven to drive the rotation of the second tube, so that the second tube naturally moves along the inclined direction. Only a small driving force is required to achieve efficient transportation of the second tube, which reduces the energy consumption of the equipment and improves the energy utilization efficiency. At the same time, this simple mechanical transmission method makes the inspection and maintenance of the device simple and ensures the efficiency of production.

[0050] As a possible implementation, Figure 7 and Figure 8 As shown, the composite tube assembly equipment also includes a welding device 5, the two ends of the welding device 5 are respectively located on the opposite sides of the transmission device 3, the welding device 5 includes a welding bracket 510 and two oppositely arranged welding components 520, the welding components 520 are movably arranged on the welding bracket 510 in a direction perpendicular to the transmission track 3120, the welding components 520 have a welding portion 521 that can be moved in the horizontal and vertical directions, and the welding portion 521 is used to weld the two ends of the composite tube respectively.

[0051] Specifically, the welding device 5 spans across the two ends of the transmission track 3120, and includes two welding assemblies 520 that are movably arranged on the welding device 5 along a direction perpendicular to the transmission track 3120. The welding assembly 520 specifically includes a welding slide 5210, a first welding lead screw slider mechanism 5211, a second welding lead screw slider mechanism 5212, a welding gun, a shielding gas delivery pipeline and a welding rod; the welding part includes a welding gun, a shielding gas delivery pipeline and a welding rod; wherein, the welding slide 5210 is in direct contact with the welding bracket 510 and is slidably arranged on the welding bracket 510, and the first welding lead screw slider mechanism 5211 and other components are all fixedly connected to the welding slide 5210 and move with the movement of the welding slide 5210. The first welding lead screw slider mechanism 5211 is vertically connected to the bottom of the welding slide 5210, and the second welding lead screw slider mechanism 5212 is fixedly connected to the slider of the first welding lead screw slider mechanism 5211. The first welding lead screw slider mechanism 5211 is used to adjust the vertical coordinates of the second welding lead screw slider mechanism 5212, the welding gun, the shielding gas delivery pipeline and the welding rod. The welding gun, the shielding gas delivery pipeline and the welding rod are all fixedly connected to the slider of the second welding lead screw slider mechanism 5212, and the second welding lead screw slider mechanism 5212 is used to adjust the horizontal coordinates of the welding gun, the shielding gas delivery pipeline and the welding rod.

[0052] In the specific implementation, first, according to the position of the bimetallic composite pipe and the welding requirements, the position of the welding slide 5210 on the welding bracket 510 is adjusted, and then the position of the welding gun in the vertical and horizontal directions is accurately adjusted by the first welding screw slider mechanism 5211 and the second welding screw slider mechanism 5212, so that the welding gun is accurately aligned with the welding area at the end of the bimetallic composite pipe. At the same time, the shielding gas delivery pipeline starts to deliver shielding gas to form shielding gas in the welding area. Then, the welding gun is started, and the welding gun generates a high-temperature arc to melt the end of the bimetallic composite pipe and the welding rod. The molten metal fuses together under the action of the arc to form a weld. During the welding process, the welding guns in the welding assemblies 520 located at both ends of the composite pipe move along the end of the bimetallic composite pipe in a circular trajectory according to the control of the operator, thereby realizing continuous welding of the entire end. The shielding gas is continuously delivered to protect the welding area from interference from the outside air. When the welding gun completes the circular welding of the end of the bimetallic composite pipe, the welding operation is stopped. At this time, the welded bimetallic composite pipe can be subjected to subsequent heating and rolling processes. The welding slide 5210 can move precisely on the welding bracket 510 through the lead screw device, and can accurately locate the position of the welding assembly 520. Through the cooperation of the first welding lead screw slider mechanism 5211 and the second welding lead screw slider mechanism 5212, it is ensured that the welding point can accurately fall on the predetermined position of the end of the bimetallic composite pipe. The high precision of the lead screw transmission enables the welding gun to ensure a stable trajectory and speed when performing circular welding, thereby forming a uniform and high-quality weld, improving the welding precision and product quality.

[0053] It should be noted that the structure for realizing the horizontal and vertical movement of the welding part 521 can be the matching structure of the above-mentioned first welding screw slider mechanism 5211 and the second welding screw slider mechanism 5212, or it can be a driving mechanism composed of two groups of servo motors, reducers, ball screws and guide rails that respectively control the horizontal and vertical movement of the welding part 521. Specifically, the servo motor drives the ball screw to rotate through the reducer, thereby driving the welding part 521 installed on the slider to move in the horizontal direction along the linear guide rail; similar to the structure of horizontal movement, the second group of driving mechanisms is installed on the slider of the horizontal moving axis, and the lifting and lowering movement of the welding part 521 in the vertical direction is realized by controlling the forward and reverse rotation of the servo motor.

[0054] As a possible implementation, Figure 1 and Fig. 9As shown, the composite tube assembly equipment also includes two conveying devices 6, which are respectively located between the first grinding device 1 and the transmission track 3120 and between the second grinding device 2 and the transmission track 3120, and the conveying device 6 includes a conveying frame 610, a plurality of V-type pulleys 620 and a conveying motor 630; wherein, a plurality of V-type pulleys 620 are arranged on the conveying frame 610 at intervals, and the V-type pulley 620 is used to transmit the first tube or the second tube; the conveying motor 630 is fixed to the conveying frame 610, and the driving end of the conveying motor 630 is transmission-connected with the plurality of V-type pulleys 620 for driving the V-type pulleys 620 to rotate.

[0055] In specific implementation, the first tube and the second tube polished on the first polishing device 1 and the second polishing device 2 are transferred to the multiple V-type pulleys 620 of the conveying frame 610. The V-type pulleys 620 can stably fit the circular outer contours of the first tube and the second tube, and due to the spaced arrangement of the multiple V-type pulleys 620, the first tube and the second tube can be provided with uniform and stable support. After the first tube and the second tube are placed, the conveying motor 630 fixed on the conveying frame 610 is started. The driving end of the conveying motor 630 transmits power to the multiple V-type pulleys 620, so that they start to rotate. With the rotation of the V-type pulleys 620, the pipe starts to move along the direction of the conveying frame 610. The continuous rotation of the multiple V-type pulleys 620 ensures the continuous transportation of the first tube and the second tube, and the first tube or the second tube is transported from one end close to the first polishing device 1 or the second polishing device 2 to the transmission track 3120. The rolling transportation of the V-type pulley 620 enables the first tube and the second tube to move at a uniform speed and smoothly.

[0056] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0057] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A composite tube assembly equipment, characterized in that: include: a first polishing device, the first polishing device being used to polish the inner wall of the first tube and transport the first tube; a second polishing device, the second polishing device being used to polish the outer wall of the second tube and transport the second tube; A transmission device, the transmission device is located between the first grinding device and the second grinding device, the transmission device comprises a transmission frame and two transmission tracks parallel to each other, the transmission tracks are movably arranged on the transmission frame, the two transmission tracks are used to respectively carry the first tube and the second tube and drive the first tube and the second tube to move, and the moving directions of the two transmission tracks are perpendicular to the axial directions of the first tube and the second tube; The blank assembling device has two ends respectively located on opposite sides of the two transmission tracks. The blank assembling device is provided with a pushing component, and the pushing component is used to push the first tube and the second tube respectively located on the two transmission tracks along the axial direction of the first tube and the second tube, so that the first tube and the second tube are nested to form a composite tube blank.

2. The composite tube assembly equipment according to claim 1, characterized in that: The transmission device includes two transmission units, each of which includes a transmission frame and a transmission track, and the two transmission units are arranged relatively parallel and located between the first grinding device and the second grinding device.

3. The composite tube assembly equipment according to claim 2, characterized in that: The transmission unit also includes: a first screw slider mechanism, the first screw slider mechanism being fixedly disposed on the transmission frame, the first screw slider mechanism comprising a screw and a first slider movable along the screw, the moving direction of the first slider being perpendicular to the axial direction of the first tube and the second tube; A lifting component, one end of which is fixedly disposed on the first sliding block, and the other end of which is fixedly connected to the transmission track; A support platform, wherein the support platform is fixedly disposed on the transmission frame, and the support platform is located above the transmission track, and is used to receive the first tube and the second tube respectively from the first grinding device and the second grinding device.

4. The composite tube assembly equipment according to claim 1, characterized in that: The transmission track is provided with a plurality of groups of limiting grooves, which are arranged along an axial direction perpendicular to the first tube and the second tube, and the limiting grooves are used to accommodate and limit the first tube and the second tube.

5. The composite tube assembly equipment according to claim 1, characterized in that: The blank assembly device comprises: An assembly support, the two ends of which are respectively located on opposite sides of the two transmission tracks; Two second screw slider mechanisms, the two second screw slider mechanisms are arranged in parallel on the blank assembly support, the two second screw slider mechanisms include two second sliders, the moving direction of the two second sliders is perpendicular to the moving direction of the transmission track, the second slider has a pushing end, and the pushing end is used to push the first tube and the second tube respectively located on the two transmission tracks, so that the first tube and the second tube are nested to form the composite tube blank.

6. The composite tube assembly equipment according to claim 1, characterized in that: The first grinding device comprises: First, polish the bracket; Two first support rollers arranged side by side, one of the first support rollers is rotatably disposed on the first grinding bracket, and the other first support roller is fixedly disposed on the first grinding bracket, the axis of the rotatably disposed first support roller is inclined relative to a horizontal plane, and the two first support rollers are used to place the first tube and move the first tube to the transmission track adjacent to the first support rollers; a first driving motor, wherein a driving end of the first driving motor is connected to the first supporting roller and is used for driving the first supporting roller to rotate; A clamping assembly, the clamping assembly is fixedly connected to the first grinding bracket, the clamping assembly has a clamping end located above the first supporting roller and movable along the direction of the first supporting roller, and the clamping end is used to fix the relative position of the first tube and the first grinding bracket; A first grinding table, wherein the first grinding table is movably disposed on the first grinding bracket in a direction close to or away from the first supporting roller; A first grinding motor, wherein the first grinding motor is fixedly mounted on the first grinding table; A first grinding component is fixedly arranged at a driving end of the first grinding motor and is used for grinding the inner wall of the first tube.

7. The composite tube assembly equipment according to claim 6, characterized in that: The clamping assembly comprises: A pressing platform, the pressing platform is fixedly arranged on one side of the first polishing bracket; A pressing motor, the pressing motor is fixedly arranged on the pressing platform; A pulley is fixed on the driving end of the pressing motor, and the pressing motor is used to press the pulley down until it contacts the first tube.

8. The composite tube assembly equipment according to claim 1, characterized in that: The second grinding device comprises: Second grinding bracket; Two second support rollers, one of which is rotatably disposed on the second polishing bracket, and the other of which is fixedly disposed on the second polishing bracket, the axis of the rotatably disposed second support roller being inclined relative to a horizontal plane, and the two second support rollers are used to place the second tube and move the second tube to the transmission track adjacent to the second support rollers; a second driving motor, wherein a driving end of the second driving motor is connected to the second supporting roller and is used for driving the second supporting roller to rotate; a second grinding table, the second grinding table being movably disposed on the second grinding bracket in a direction approaching or moving away from the second supporting roller; A second grinding motor, wherein the second grinding motor is fixedly mounted on the second grinding table; A second grinding component, wherein the second grinding component is fixedly connected to the driving end of the second grinding motor and is used for grinding the outer wall of the second tube.

9. The composite tube assembly equipment according to claim 1, characterized in that: The composite tube assembly equipment also includes a welding device, the two ends of which are respectively located on opposite sides of the transmission device, the welding device includes a welding bracket and two oppositely arranged welding components, the welding components are movably arranged on the welding bracket in a direction perpendicular to the transmission track, the welding components have a welding portion that can be moved in the horizontal and vertical directions, and the welding portion is used to weld the two ends of the composite tube blank respectively.

10. The composite tube assembly equipment according to claim 1, characterized in that: The composite tube assembly equipment further includes two conveying devices, which are respectively located between the first grinding device and an adjacent one of the transmission tracks and between the second grinding device and another adjacent one of the transmission tracks, and the conveying devices include: Conveyor rack; A plurality of V-shaped pulleys, the plurality of V-shaped pulleys are arranged at intervals on the conveying frame, and the V-shaped pulleys are used to transport the first tube or the second tube; A conveying motor is fixedly mounted on the conveying frame, and a driving end of the conveying motor is drivingly connected to the V-type pulley for driving the V-type pulley to rotate.

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