Ultrasonic welding equipment and HDPE pipe welding process suitable for HDPE pipe welding

Abstract

The present invention relates to an ultrasonic welding device and a HDPE pipeline welding process suitable for HDPE pipeline welding, belonging to the field of HDPE pipelines, including an ultrasonic welding mechanism and a supporting mechanism; the supporting mechanism includes a cylindrical supporting column, and a dividing interface for dividing the supporting column into a first supporting strip, a second supporting strip and a third supporting strip is formed in the supporting column; the dividing interface includes a first dividing interface, a second dividing interface and a third dividing interface, and the first dividing interface, the second dividing interface and the third dividing interface intersect in a straight line to form a crossing line, and the angles between the first dividing interface and the second dividing interface and the third dividing interface are all 60°; the two end faces of the supporting column are respectively a starting face and an end face, one end of the crossing line is located at the center of the starting face, the other end of the crossing line is located on the end face, and the length of the intersection line between the first dividing interface and the end face is greater than the radius of the end face. The present invention can effectively ensure the quality of ultrasonic welding and ensure the strength and sealing of its welding structure.

Description

Technical Field

[0001] The invention relates to the field of HDPE pipes, and in particular to an ultrasonic welding device suitable for HDPE pipe welding and a HDPE pipe welding process. Background Art

[0002] HDPE pipe is a pipe made of high-density polyethylene, which is generally used as a replacement for traditional steel pipes and polyvinyl chloride pipes.

[0003] At present, the connection between HDPE pipes generally adopts hot-melt connection and electric-melt connection. Among them, hot-melt connection is to heat and melt the ends of two HDPE pipes, and then connect and fix the molten parts of the ends of the two HDPE pipes together to complete the connection of the HDPE pipes; electric-melt connection is to put a connecting pipe with a built-in heating resistance wire on the two HDPE pipes, and heat the HDPE pipes and the connecting pipe with the resistance wire to melt the two HDPE pipes and the connecting pipe together to complete the connection of the HDPE pipes.

[0004] However, for hot-melt connection, the pipes and fittings need to be preheated during the process. The whole connection process is relatively time-consuming, especially in large projects, which may affect the progress of the project. In addition, hot-melt connection is greatly affected by the ambient temperature. In extremely cold or hot environments, the connection effect may be affected. For electric fusion connection, each electric fusion joint also requires a certain heating and cooling time, which will also affect the construction progress. If the HDPE pipe is welded using ultrasonic welding technology, the influence of ambient temperature on the welding process can be overcome, the time required for welding can be reduced, and the construction progress can be improved. However, during the ultrasonic welding process, a certain pressure needs to be applied at the welding position. The hollow HDPE pipe is easily deformed by pressure, which affects the welding quality and reduces the firmness and sealing of ultrasonic welding.

[0005] Based on this, the present invention provides an ultrasonic welding device and a HDPE pipe welding process suitable for HDPE pipe welding, which are used to support the inner wall of the HDPE pipe while welding the HDPE pipe, so as to avoid deformation of the HDPE pipe during the ultrasonic welding process, thereby improving the welding quality of ultrasonic welding and ensuring the firmness and sealing of the ultrasonic welding structure. Summary of the invention

[0006] Based on this, the present invention provides an ultrasonic welding device suitable for HDPE pipe welding, comprising an ultrasonic welding mechanism and a supporting mechanism; the supporting mechanism comprises a cylindrical supporting column, wherein a dividing interface for dividing the supporting column into a first supporting strip, a second supporting strip and a third supporting strip is formed in the supporting column; the dividing interface comprises a first dividing interface, a second dividing interface and a third dividing interface, wherein the first dividing interface, the second dividing interface and the third dividing interface intersect in a straight line to form an intersection line, and the angles between the first dividing interface and the second dividing interface and the third dividing interface are all 60°; the portion of the supporting column located between the first dividing interface and the second dividing interface is the second supporting strip, the portion of the supporting column located between the first dividing interface and the third dividing interface is the third supporting strip, and the portion of the supporting column located between the second dividing interface and the third dividing interface is the first supporting strip; the two end faces of the supporting column are respectively a starting face and an end face, one end of the intersection line is located at the center of the starting face, the other end of the intersection line is located on the end face, and the length of the intersection line between the first dividing interface and the end face is greater than the radius of the end face.

[0007] The present invention is used for ultrasonic welding of two HDPE pipes with the same diameter. A connecting pipe is required for welding of HDPE pipes, wherein the inner diameter of the connecting pipe needs to be the same as the outer diameter of the HDPE pipe to be welded. By sleeved the connecting pipe on the ends of the two HDPE pipes to be welded, the preliminary connection of the two HDPE pipes can be achieved.

[0008] In the present invention, the support column is used to be placed at the connection of two HDPE pipes, that is, at the place where the two HDPE pipes are to be welded, so as to support the inner wall of the HDPE pipe. After the support column is placed in the HDPE pipe, an ultrasonic welding mechanism can be used to perform ultrasonic welding operations on the connecting pipe and the HDPE pipe on the surface of the connecting pipe, wherein the ultrasonic welding mechanism can use a handheld ultrasonic welding machine. At this time, the connecting pipe and the HDPE pipe can be fixed together to complete the welding of the HDPE pipe. In this process, since the inner wall of the HDPE pipe is supported by the support column, the support column can prevent the HDPE pipe from being deformed, thereby ensuring the structural strength and sealing of the welded HDPE pipe.

[0009] In addition, in the present invention, the support column is formed by splicing the first support bar, the second support bar and the third support bar, and the side of the first support bar facing the starting surface is larger than the side facing the end surface. Therefore, after completing the ultrasonic welding, by dragging the first support bar along the side away from the starting surface, the surface of the first support bar can be made to "sink" relative to the surface of the support column. Preferably, when the support column is inserted into the HDPE tube, the first support bar is located at the top of the support column. At this time, the first support bar will not be rubbed by the inner wall of the HDPE tube, and the first support bar can be easily dragged out of the HDPE tube. Then, after the second support bar and the third support bar lose the support of the first support bar, they can also be easily dragged out of the HDPE tube. That is, after completing the ultrasonic welding, the present invention can easily remove the support column in the HDPE tube. Among them, in order to facilitate the pulling out of the first support bar, the second support bar and the third support bar from the HDPE pipe, a pull ring can be set at the end of the first support bar, the second support bar and the third support bar located at the starting surface, and a pull rope can be fixed on the pull ring. By pulling the pull rope at the other end port of the HDPE pipe, the first support bar, the second support bar and the third support bar can be pulled out of the HDPE pipe.

[0010] Furthermore, the length of the intersection line between the first interface and the end surface is not greater than five quarters of the radius of the end surface and not less than nine eighths of the radius of the end surface.

[0011] In the present invention, the length of the intersection line between the first interface and the end face is not greater than five-quarters of the radius of the end face and not less than nine-eighths of the radius of the end face. This ensures that the surface of the first support bar can "sink" relative to the surface of the support column, so that the first support bar can be easily taken out of the HDPE pipe. At the same time, it ensures that the remaining second support bar and the third support bar have a larger range of movement in the HDPE pipe, that is, it ensures that the second support bar and the third support bar can also be easily dragged out of the HDPE pipe.

[0012] Furthermore, the end of the first support bar located on the starting surface of the support column is a connecting end, and a connecting plate is fixedly provided on the connecting end; the end of the second support bar and the third support bar located on the starting surface of the support column is an installation end, and the connecting plate extends to the installation ends of the second support bar and the third support bar, and is detachably fixedly connected to the installation ends.

[0013] In the present invention, the first support bar is fixedly connected to the second support bar and the third support bar by a connecting plate fixedly arranged thereon. Therefore, relative sliding between the first support bar, the second support bar and the third support bar can be avoided during the installation process of the support column and when the support column supports the inner side wall of the HDPE pipe, thereby achieving the purpose of ensuring the supporting effect of the support column for the HDPE pipe.

[0014] Furthermore, threaded mounting holes are provided on the mounting ends of the second support bar and the third support bar, and a connecting rod is provided on the connecting plate corresponding to the threaded mounting holes. The connecting rod is rotatably arranged on the connecting plate, and an external thread is provided on one end of the connecting rod facing the threaded mounting hole and the connecting rod is installed in the threaded mounting hole through the external thread thereon.

[0015] In the present invention, the connecting plate is detachably fixedly connected to the second support bar and the third support bar through the threaded connection structure of the connecting rod on it and the threaded mounting holes on the second support bar and the third support bar, thereby realizing the fixed connection between the first support bar, the second support bar and the third support bar. The connecting rod can be rotatably arranged on the connecting plate through a bearing structure or a sliding fit structure.

[0016] Furthermore, a driving device is also provided at the connecting end of the first support bar, and the driving device is drivingly connected to the connecting rod on the connecting plate to drive the connecting rod to rotate.

[0017] In the present invention, the driving device on the first support bar is used to drive the connecting rod to rotate, so that it can be used to release the threaded connection structure between the connecting rod and the second support bar and the third support bar, that is, to release the fixed connection structure between the first support bar, the second support bar and the third support bar. In the process of the driving device driving the connecting rod to rotate and disengage from the threaded connection hole, the interaction between the external thread on the connecting rod and the thread on the threaded connection hole will push the connecting plate away from the second support bar and the third support bar, so that the first support bar can be pushed to move relative to the second support bar and the third support bar, and the structure of the support column can be released. At this time, the surface of the first support bar will "sink" relative to the surface of the support column, and will not be rubbed by the inner wall of the HDPE pipe, which can effectively facilitate the first support bar to be dragged out of the HDPE pipe.

[0018] Furthermore, a mounting groove is provided on the connecting end of the first support bar, the driving device includes a driving motor arranged in the mounting groove, a power output shaft of the driving motor extends out of the mounting groove and is installed with a first transmission gear, and an end of the connecting rod away from the threaded mounting hole is provided with a second transmission gear meshing with the first transmission gear corresponding to the first transmission gear.

[0019] In the present invention, the driving motor can be installed in the mounting groove through the mounting bracket, and the driving motor is used to drive the first transmission gear to rotate, so that the first transmission gear can drive the two second transmission gears to rotate in the same direction, thereby achieving the purpose of releasing the connection structure of the connecting rod and the threaded connecting rod. The driving motor can be powered by an external power supply, and the wire of the external power supply can enter the HDPE pipe from the other end port of the HDPE pipe to realize power supply for the driving motor.

[0020] Furthermore, the ultrasonic welding mechanism includes a frame, the frame includes a base and a mounting seat, the mounting seat is reciprocatingly arranged at the top of the base along the X-axis direction, a first mounting ring in the shape of an annulus is arranged on the mounting seat, and the axial direction of the first mounting ring is arranged along the X-axis direction; the first mounting ring includes a first half ring and a second half ring arranged up and down, the second half ring is fixedly arranged on the mounting seat, and the first half ring is detachably arranged on the second half ring; a second mounting ring in the shape of an annulus is rotatably arranged on the first mounting ring, the second mounting ring is coaxially arranged with the first mounting ring and a notch is provided on the second mounting ring; the frame is also provided with An ultrasonic welding device is provided, which includes an ultrasonic control box arranged on the mounting seat, and a welding module installed on the second mounting ring and integrating a transducer, an amplitude transformer and a welding head, the welding module is connected to the ultrasonic control box, the welding head of the welding module is located on the inner side of the second mounting ring and its cross-section is arc-shaped, and the axis of the welding head coincides with the axis of the second mounting ring; a lifting device is also provided on the second mounting ring, the lifting device can be an electric cylinder, a support plate is fixedly provided on the power output shaft of the lifting device, the support plate is located in the second mounting ring, and the support plate and the welding head are symmetrically arranged about the axis of the second mounting ring.

[0021] In the present invention, the X-axis direction is the linear direction in the horizontal plane. The mounting seat can be arranged at the top of the base through a guide rail structure, and a cylinder connected to the mounting seat is arranged on the base to push the mounting seat to move back and forth on the base. The first mounting ring arranged on the mounting seat is composed of a first half ring and a second half ring, which can conveniently move the HDPE pipe to be welded to the inner side of the first mounting ring. In particular, during on-site construction, when one of the two HDPE pipes has been fixed, the first half ring can be removed from the second half ring to conveniently place the HDPE pipe inside the first mounting ring. Similarly, the notch on the second mounting ring can also conveniently place the HDPE pipe inside the second mounting ring. The ultrasonic control box arranged on the mounting seat is connected to the welding module on the second mounting ring through a connecting line, which is used to control the ultrasonic welding operation of the welding module. The first half ring and the second half ring can be fixedly connected to each other through a threaded connection structure arranged at their ends.

[0022] In the present invention, the welding module and the lifting device arranged on the second mounting ring are used to perform ultrasonic welding operations on the HDPE pipe. Specifically, the lifting device is used to drive the support plate to push the connecting pipe toward the welding head, and apply pressure between the connecting pipe and the HDPE pipe. The welding head of the welding module is used to output high-frequency vibrations to the connecting pipe and the HDPE pipe to weld the connecting pipe and the HDPE pipe. It is worth noting that the diameters of the welding head and the support plate need to be the same as the outer diameter of the connecting pipe. During the welding process, the connecting pipe and the HDPE pipe can be welded in the entire circumferential direction by rotating the second mounting ring relative to the first mounting ring. At the same time, by moving the mounting seat in the X-axis direction, that is, in the axial direction of the HDPE, multiple welding can be performed on the connecting pipe and the HDPE pipe to improve the strength and sealing of the welding structure.

[0023] Furthermore, the inner wall of the first mounting ring is provided with a circular limiting groove along its circumferential direction, and the outer wall of the second mounting ring is provided with a plurality of rollers corresponding to the limiting groove, and the rollers are embedded in the limiting groove and are arranged to roll with the limiting groove.

[0024] In the present invention, the second mounting ring is rotatably connected to the second mounting ring through the matching structure of the roller and the limiting groove thereon, wherein the operator can conveniently rotate the second mounting ring by installing a handle on the second mounting ring.

[0025] In addition, the present invention also provides a HDPE pipe welding process suitable for the above ultrasonic welding equipment, comprising the following steps:

[0026] S1. Prepare a main HDPE pipe and a slave HDPE pipe to be welded and a connecting pipe for sleeved on the end of the main HDPE pipe, wherein the inner diameter of the connecting pipe is the same as the outer diameter of the main HDPE pipe and the outer diameter of the slave HDPE pipe;

[0027] S2, fixing the ultrasonic welding mechanism at a suitable position so that the second mounting ring is sleeved on the end of the main HDPE pipe, and the axis of the second mounting ring coincides with the axis of the main HDPE pipe;

[0028] Among them, the base of the ultrasonic welding machine can be used as its mounting structure to realize the fixed installation of the ultrasonic welding machine. Before the second mounting ring is put on the main HDPE pipe, the first half ring can be removed from the second half ring to facilitate the insertion of the main HDPE pipe. After the main HDPE pipe enters the inner side of the first mounting ring, it can enter the inner side of the second mounting ring through the gap of the second mounting ring.

[0029] The first half ring and the second half ring can be fixedly connected to each other via a threaded connection structure arranged at their ends.

[0030] S3, insert the support column into the main HDPE pipe located on the inner side of the second mounting ring, and make the support column exposed to the preset length of the main HDPE pipe, then put one end of the connecting pipe on the main HDPE pipe and make the connecting pipe supported between the support plate and the welding head, and the support plate and the welding head are located at the end of the connecting pipe sleeved on the main HDPE pipe, then insert the slave HDPE pipe into the connecting pipe, and at the same time make the support column inserted into the slave HDPE pipe, and make the ends of the main HDPE pipe and the slave HDPE pipe butt against each other;

[0031] Among them, after the connecting pipe is sleeved on the main HDPE pipe, the support plate and the welding head are located at the end of the connecting pipe sleeved on the main HDPE pipe. Since the diameters of the support plate and the welding head are the same as the outer diameter of the connecting pipe, the support plate and the welding head can exert a certain squeezing effect on the connecting pipe, thereby fixing the position of the connecting column inserted in the main HDPE pipe, and avoiding pushing the support column to the inside of the main HDPE pipe when inserting the slave HDPE pipe. In addition, when inserting the slave HDPE pipe, the support column in the main HDPE pipe can be fixed with a pipe clamp.

[0032] S4, the lifting device drives the support plate to lift up toward the axis of the connecting pipe, applies a preset pressure f to the connecting pipe, and the welding module works at the same time. After a duration of t, the lifting device releases the drive on the support plate, and the second mounting ring rotates clockwise by an angle α, wherein the angle α is smaller than the central angle β of the welding head, and this process is repeated until the welding head rotates one circle around the connecting pipe;

[0033] Among them, after the welding head rotates around the connecting pipe once, one end of the connecting pipe will be welded to the main HDPE pipe.

[0034] S5, the mounting seat moves along the X-axis direction to the point where the ends of the main HDPE pipe and the secondary HDPE pipe abut against each other, and is located between the support plate and the welding head. Then, the lifting device drives the support plate to lift up toward the axis of the connecting pipe, and applies a preset pressure f to the connecting pipe. At the same time, the welding module works. After a duration of t, the lifting device releases the drive of the support plate, and the second mounting ring rotates clockwise by an angle α, and this process is repeated until the welding head rotates one circle around the connecting pipe.

[0035] When the end abutment of the main HDPE pipe and the secondary HDPE pipe is located between the support plate and the welding head, the welding head can rotate around the connecting pipe once to weld the middle of the connecting pipe to the main HDPE pipe and the secondary HDPE pipe at the same time.

[0036] S6. The mounting seat moves along the X-axis direction until the end of the connecting pipe sleeve on the slave HDPE pipe is located between the support plate and the welding head. Then, the lifting device drives the support plate to lift up toward the axis of the connecting pipe, applying a preset pressure f to the connecting pipe, and the welding module works at the same time. After a duration of t, the lifting device releases the drive of the support plate, and the second mounting ring rotates clockwise by an angle α, and repeats this process until the welding head rotates one circle around the connecting pipe. At this time, the welding of the main HDPE pipe and the slave HDPE pipe is completed.

[0037] The principle and effect of the present invention are further described below in combination with the above technical solutions and the accompanying drawings:

[0038] In the present invention, the support column is used to be placed at the connection of two HDPE pipes, that is, at the place where the two HDPE pipes are to be welded, so as to support the inner wall of the HDPE pipe. After the support column is placed in the HDPE pipe, an ultrasonic welding mechanism can be used to perform ultrasonic welding operations on the connecting pipe and the HDPE pipe on the surface of the connecting pipe, wherein the ultrasonic welding mechanism can use a handheld ultrasonic welding machine. At this time, the connecting pipe and the HDPE pipe can be fixed together to complete the welding of the HDPE pipe. In this process, since the inner wall of the HDPE pipe is supported by the support column, the support column can prevent the HDPE pipe from being deformed, thereby ensuring the structural strength and sealing of the welded HDPE pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the structure of the support column according to an embodiment of the present invention;

[0040] Figure 2 for Figure 1 A partial enlarged view of

[0041] Figure 3 The structure of the starting surface of the support column according to the embodiment of the present invention is schematically shown. Figure 1 ;

[0042] Figure 4 The schematic diagram of the starting surface of the support column according to the embodiment of the present invention is shown in FIG. Figure 2 ;

[0043] Figure 5 is a schematic structural diagram of the end surface according to an embodiment of the present invention;

[0044] Figure 6 This is a schematic diagram of the matching structure of the first support bar, the second support bar and the third support bar in an embodiment of the present invention;

[0045] Figure 7 It is a structural schematic diagram of the welding mechanism according to an embodiment of the present invention;

[0046] Figure 8 for Figure 7 Schematic diagram of the local cross-sectional structure.

[0047] Attached photos

[0048] 11-first support bar, 111-mounting groove, 112-drive motor, 113-first transmission gear, 114-connecting plate, 115-connecting rod, 1151-second transmission gear, 1152-external thread, 12-second support bar, 13-third support bar, 141-first dividing interface, 142-second dividing interface, 143-third dividing interface, 144-intersection line, 21-base, 22-mounting seat, 231-first half ring, 232-second half ring, 233-limiting groove, 24-second mounting ring, 241-handle, 242-roller, 25-welding module, 251-welding head, 26-ultrasonic control box, 27-lifting device, 271-support plate, 3-pull ring. DETAILED DESCRIPTION

[0049] In order to facilitate understanding by those skilled in the art, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0050] like Figure 1-8 , an ultrasonic welding device suitable for HDPE pipe welding, comprising an ultrasonic welding mechanism and a supporting mechanism; the supporting mechanism comprises a cylindrical supporting column, wherein a dividing interface for dividing the supporting column into a first supporting bar 11, a second supporting bar 12 and a third supporting bar 13 is formed in the supporting column; the dividing interface comprises a first dividing interface 141, a second dividing interface 142 and a third dividing interface 143, wherein the first dividing interface 141, the second dividing interface 142 and the third dividing interface 143 intersect in a straight line to form an intersection line 144, and the angles between the first dividing interface 141 and the second dividing interface 142 and the third dividing interface 143 are all 60°; The portion of the support column located between the first boundary surface 141 and the second boundary surface 142 is the second support bar 12, the portion of the support column located between the first boundary surface 141 and the third boundary surface 143 is the third support bar 13, and the portion of the support column located between the second boundary surface 142 and the third boundary surface 143 is the first support bar 11; the two end faces of the support column are respectively a starting face and an end face, one end of the intersection line 144 is located at the center of the starting face, the other end of the intersection line 144 is located on the end face, and the length of the intersection line between the first boundary surface 141 and the end face is greater than the radius of the end face.

[0051] The present invention is used for ultrasonic welding of two HDPE pipes with the same diameter. A connecting pipe is required for welding of HDPE pipes, wherein the inner diameter of the connecting pipe needs to be the same as the outer diameter of the HDPE pipe to be welded. By sleeved the connecting pipe on the ends of the two HDPE pipes to be welded, the preliminary connection of the two HDPE pipes can be achieved.

[0052] In the present invention, the support column is used to be placed at the connection of two HDPE pipes, that is, at the place where the two HDPE pipes are to be welded, so as to support the inner wall of the HDPE pipe. After the support column is placed in the HDPE pipe, an ultrasonic welding mechanism can be used to perform ultrasonic welding operations on the connecting pipe and the HDPE pipe on the surface of the connecting pipe, wherein the ultrasonic welding mechanism can use a handheld ultrasonic welding machine. At this time, the connecting pipe and the HDPE pipe can be fixed together to complete the welding of the HDPE pipe. In this process, since the inner wall of the HDPE pipe is supported by the support column, the support column can prevent the HDPE pipe from being deformed, thereby ensuring the structural strength and sealing of the welded HDPE pipe.

[0053] In addition, in the present invention, the support column is formed by splicing the first support bar 11, the second support bar 12 and the third support bar 13, and the side of the first support bar 11 facing the starting surface is larger than the side facing the end surface. Therefore, after completing the ultrasonic welding, by dragging the first support bar 11 along the side away from the starting surface, the surface of the first support bar 11 can be made to "sink" relative to the surface of the support column. Preferably, when the support column is inserted into the HDPE pipe, the first support bar 11 is located at the top of the support column. At this time, the first support bar 11 will not be rubbed by the inner wall of the HDPE pipe, and the first support bar 11 can be easily dragged out of the HDPE pipe. Then, after the second support bar 12 and the third support bar 13 lose the support of the first support bar 11, they can also be easily dragged out of the HDPE pipe. That is, after completing the ultrasonic welding, the present invention can easily remove the support column in the HDPE pipe. Among them, in order to facilitate dragging out the first support bar 11, the second support bar 12 and the third support bar 13 from the HDPE pipe, a pull ring 3 can be set at the end of the first support bar 11, the second support bar 12 and the third support bar 13 located at the starting surface, and a pull rope can be fixed on the pull ring 3. By pulling the pull rope at the other end port of the HDPE pipe, the first support bar 11, the second support bar 12 and the third support bar 13 can be pulled out of the HDPE pipe.

[0054] In one embodiment, the length of the intersection line between the first interface 141 and the end surface is not greater than five-quarters of the radius of the end surface, and not less than nine-eighths of the radius of the end surface.

[0055] In this embodiment, the length of the intersection line between the first interface 141 and the end surface is not greater than five-quarters of the radius of the end surface and not less than nine-eighths of the radius of the end surface. This ensures that the surface of the first support bar 11 can "sink" relative to the surface of the support column, so that the first support bar 11 can be easily removed from the HDPE pipe. At the same time, it ensures that the remaining second support bar 12 and the third support bar 13 have a larger range of movement in the HDPE pipe, that is, it ensures that the second support bar 12 and the third support bar 13 can also be easily dragged out of the HDPE pipe.

[0056] In one embodiment, one end of the first support bar 11 located on the starting surface of the support column is a connecting end, and a connecting plate 114 is fixedly provided on the connecting end; one end of the second support bar 12 and the third support bar 13 located on the starting surface of the support column is a mounting end, and the connecting plate 114 extends to the mounting ends of the second support bar 12 and the third support bar 13, and is detachably fixedly connected to the mounting ends.

[0057] In this embodiment, the first support bar 11 is fixedly connected to the second support bar 12 and the third support bar 13 by a connecting plate 114 fixedly arranged thereon. Therefore, relative sliding between the first support bar 11, the second support bar 12 and the third support bar 13 can be avoided during the installation of the support column and when the support column supports the inner wall of the HDPE pipe, thereby achieving the purpose of ensuring the supporting effect of the support column on the HDPE pipe.

[0058] In one embodiment, threaded mounting holes are provided on the mounting ends of the second support bar 12 and the third support bar 13, and a connecting rod 115 is provided on the connecting plate 114 corresponding to the threaded mounting holes. The connecting rod 115 is rotatably arranged on the connecting plate 114, and an external thread 1152 is provided on one end of the connecting rod 115 facing the threaded mounting hole and the connecting rod 115 is installed in the threaded mounting hole through the external thread 1152 thereon.

[0059] In this embodiment, the connecting plate 114 is detachably fixedly connected to the second support bar 12 and the third support bar 13 through the threaded connection structure of the connecting rod 115 thereon and the threaded mounting holes on the second support bar 12 and the third support bar 13, thereby realizing the fixed connection between the first support bar 11, the second support bar 12 and the third support bar 13. Among them, the connecting rod 115 can be rotatably set on the connecting plate 114 through a bearing structure or a sliding matching structure.

[0060] In one embodiment, a driving device is further provided at the connecting end of the first support bar 11 , and the driving device is drivingly connected to the connecting rod 115 on the connecting plate 114 to drive the connecting rod 115 to rotate.

[0061] In this embodiment, the driving device on the first support bar 11 is used to drive the connecting rod 115 to rotate, so as to release the threaded connection structure between the connecting rod 115 and the second support bar 12 and the third support bar 13, that is, to release the fixed connection structure between the first support bar 11, the second support bar 12 and the third support bar 13. In the process of the driving device driving the connecting rod 115 to rotate and disengage from the threaded connection hole, the interaction between the external thread 1152 on the connecting rod 115 and the thread on the threaded connection hole will push the connecting plate 114 away from the second support bar 12 and the third support bar 13, so as to push the first support bar 11 to move relative to the second support bar 12 and the third support bar 13, and release the structure of the support column. At this time, the surface of the first support bar 11 will "sink" relative to the surface of the support column, and will not be rubbed by the inner wall of the HDPE pipe, which can effectively facilitate the first support bar 11 to be dragged out of the HDPE pipe.

[0062] In one embodiment, a mounting groove 111 is provided on the connecting end of the first support bar 11, and the driving device includes a driving motor 112 arranged in the mounting groove 111, a power output shaft of the driving motor 112 extends out of the mounting groove 111 and is installed with a first transmission gear 113, and an end of the connecting rod 115 away from the threaded mounting hole is provided with a second transmission gear 1151 meshing with the first transmission gear 113 corresponding to the first transmission gear 113.

[0063] In this embodiment, the driving motor 112 can be installed in the mounting groove 111 through the mounting bracket, and the driving motor 112 is used to drive the first transmission gear 113 to rotate, so that the two second transmission gears 1151 can be driven to rotate in the same direction through the first transmission gear 113, thereby achieving the purpose of releasing the connection structure between the connecting rod 115 and the threaded connecting rod 115. The driving motor 112 can be powered by an external power supply, and the wire of the external power supply can enter the HDPE pipe from the other end port of the HDPE pipe to realize power supply for the driving motor 112.

[0064] In one embodiment, the ultrasonic welding mechanism includes a frame, the frame includes a base 21 and a mounting seat 22, the mounting seat 22 can be reciprocated along the X-axis direction and is arranged at the top of the base 21, the mounting seat 22 is provided with a first mounting ring in the shape of an annulus, and the axial direction of the first mounting ring is arranged along the X-axis direction; the first mounting ring includes a first half ring 231 and a second half ring 232 arranged up and down, the second half ring 232 is fixedly arranged on the mounting seat 22, and the first half ring 231 is detachably arranged on the second half ring 232; a second mounting ring 24 in the shape of an annulus is rotatably arranged on the first mounting ring, the second mounting ring 24 is arranged coaxially with the first mounting ring and a notch is opened on the second mounting ring 24; the frame is also provided with an ultrasonic welding device The ultrasonic welding device includes an ultrasonic control box 26 arranged on the mounting seat 22, and a welding module 25 installed on the second mounting ring 24, which is integrated with a transducer, an amplitude transformer and a welding head 251, the welding module 25 is connected to the ultrasonic control box 26, the welding head 251 of the welding module 25 is located on the inner side of the second mounting ring 24 and its cross-section is arc-shaped, and the axis of the welding head 251 coincides with the axis of the second mounting ring 24; the second mounting ring 24 is also provided with a lifting device 27, the lifting device 27 can be an electric cylinder, and a support plate 271 is fixedly provided on the power output shaft of the lifting device 27, the support plate 271 is located in the second mounting ring 24 and the support plate 271 and the welding head 251 are symmetrically arranged about the axis of the second mounting ring 24.

[0065] In this embodiment, the X-axis direction is the linear direction in the horizontal plane. The mounting seat 22 can be arranged at the top of the base 21 through a guide rail structure. The mounting seat 22 is pushed to reciprocate on the base 21 by arranging a cylinder connected to the mounting seat 22 on the base 21. The first mounting ring arranged on the mounting seat 22 is composed of a first half ring 231 and a second half ring 232, which can conveniently move the HDPE pipe to be welded to the inner side of the first mounting ring. In particular, during on-site construction, when one of the two HDPE pipes has been fixed, the first half ring 231 can be removed from the second half ring 232 to conveniently place the HDPE pipe inside the first mounting ring. Similarly, the notch on the second mounting ring 24 can also conveniently place the HDPE pipe inside the second mounting ring 24. The ultrasonic control box 26 arranged on the mounting seat 22 is connected to the welding module 25 on the second mounting ring 24 through a connecting line, and is used to control the ultrasonic welding operation of the welding module 25. The first half ring 231 and the second half ring 232 can be fixedly connected to each other through a threaded connection structure arranged at their ends.

[0066] In this embodiment, the welding module 25 and the lifting device 27 arranged on the second mounting ring 24 are used to perform ultrasonic welding operations on the HDPE pipe. Specifically, the lifting device 27 is used to drive the support plate 271 to push the connecting pipe toward the welding head 251, and apply pressure between the connecting pipe and the HDPE pipe. The welding head 251 of the welding module 25 is used to output high-frequency vibration to the connecting pipe and the HDPE pipe to weld the connecting pipe and the HDPE pipe. It is worth noting that the diameter of the welding head 251 and the support plate 271 needs to be the same as the outer diameter of the connecting pipe; during the welding process, the entire circumferential direction of the connecting pipe and the HDPE pipe can be welded by rotating the second mounting ring 24 relative to the first mounting ring. At the same time, by moving the mounting seat 22 in the X-axis direction, that is, in the axial direction of the HDPE, multiple welding can be performed on the connecting pipe and the HDPE pipe to improve the strength and sealing of the welding structure.

[0067] In one embodiment, the inner wall of the first mounting ring is provided with a circular limiting groove 233 along its circumferential direction, and the outer wall of the second mounting ring 24 is provided with a plurality of rollers 242 corresponding to the limiting groove 233, and the rollers 242 are embedded in the limiting groove 233 and are arranged to roll with the limiting groove 233.

[0068] In this embodiment, the second mounting ring 24 is rotatably connected to the second mounting ring 24 by the matching structure of the roller 242 thereon and the limiting groove 233, wherein the second mounting ring 24 can be conveniently rotated by the operator by installing a handle 241 on the second mounting ring 24.

[0069] In addition, the present invention also provides a HDPE pipe welding process suitable for the above ultrasonic welding equipment, comprising the following steps:

[0070] S1. Prepare a main HDPE pipe and a slave HDPE pipe to be welded and a connecting pipe for sleeved on the end of the main HDPE pipe, wherein the inner diameter of the connecting pipe is the same as the outer diameter of the main HDPE pipe and the outer diameter of the slave HDPE pipe;

[0071] S2, fix the ultrasonic welding mechanism at a suitable position so that the second mounting ring 24 is sleeved on the end of the main HDPE pipe, and the axis of the second mounting ring 24 coincides with the axis of the main HDPE pipe;

[0072] Among them, the base 21 of the ultrasonic welding machine can be used as its mounting structure to realize the fixed installation of the ultrasonic welding machine. Before the second mounting ring 24 is put on the main HDPE pipe, the first half ring 231 can be removed from the second half ring 232 to facilitate the insertion of the main HDPE pipe. After the main HDPE pipe enters the inner side of the first mounting ring, it can enter the inner side of the second mounting ring 24 through the gap of the second mounting ring 24.

[0073] The first half ring 231 and the second half ring 232 can be fixedly connected to each other via a threaded connection structure disposed at their ends.

[0074] S3, insert the support column into the main HDPE pipe located inside the second mounting ring 24, and make the support column exposed to the preset length of the main HDPE pipe, then put one end of the connecting pipe on the main HDPE pipe and make the connecting pipe supported between the support plate 271 and the welding head 251, and the support plate 271 and the welding head 251 are located at the end of the connecting pipe sleeved on the main HDPE pipe, then insert the slave HDPE pipe into the connecting pipe, and at the same time make the support column inserted into the slave HDPE pipe, and make the ends of the main HDPE pipe and the slave HDPE pipe abut against each other;

[0075] Among them, after the connecting pipe is sleeved on the main HDPE pipe, the support plate 271 and the welding head 251 are located at the end of the connecting pipe sleeved on the main HDPE pipe. Since the diameters of the support plate 271 and the welding head 251 are the same as the outer diameter of the connecting pipe, the support plate 271 and the welding head 251 can exert a certain squeezing effect on the connecting pipe, thereby fixing the position of the connecting column inserted into the main HDPE pipe, and avoiding pushing the support column to the inside of the main HDPE pipe when inserting the slave HDPE pipe. In addition, when inserting the slave HDPE pipe, the support column in the main HDPE pipe can be fixed with a pipe clamp.

[0076] S4, the lifting device 27 drives the support plate 271 to lift up toward the axis of the connecting pipe, applies a preset pressure f to the connecting pipe, and the welding module 25 works at the same time. After a duration of t, the lifting device 27 releases the drive on the support plate 271, and the second mounting ring 24 rotates clockwise by an angle α, wherein the angle α is less than the central angle β of the welding head 251. Preferably, the angle α is 90%-95% of the angle β, and this is repeated until the welding head 251 rotates one circle around the connecting pipe;

[0077] Among them, after the welding head 251 rotates around the connecting pipe once, one end of the connecting pipe will be welded to the main HDPE pipe.

[0078] S5, the mounting seat 22 moves along the X-axis direction to the point where the ends of the main HDPE pipe and the slave HDPE pipe abut against each other, and is located between the support plate 271 and the welding head 251. Then, the lifting device 27 drives the support plate 271 to lift up toward the axis of the connecting pipe, and applies a preset pressure f to the connecting pipe. At the same time, the welding module 25 works. After a duration of t, the lifting device 27 releases the drive of the support plate 271, and the second mounting ring 24 rotates clockwise by an angle α, and this process is repeated until the welding head 251 rotates one circle around the connecting pipe.

[0079] When the end abutment of the main HDPE pipe and the secondary HDPE pipe is located between the support plate 271 and the welding head 251, the welding head 251 rotates around the connecting pipe once to weld the middle part of the connecting pipe to the main HDPE pipe and the secondary HDPE pipe at the same time.

[0080] S6. The mounting seat 22 moves along the X-axis direction until the end of the connecting pipe sleeve on the slave HDPE pipe is located between the support plate 271 and the welding head 251. Then, the lifting device 27 drives the support plate 271 to lift up toward the axis of the connecting pipe, applying a preset pressure f to the connecting pipe, and the welding module 25 works at the same time. After a duration of t, the lifting device 27 releases the drive on the support plate 271, and the second mounting ring 24 rotates clockwise by an angle α, and so on and so forth until the welding head 251 rotates one circle around the connecting pipe. At this time, the welding of the main HDPE pipe and the slave HDPE pipe is completed.

[0081] After the welding head 251 rotates around the connecting pipe once, the other end of the connecting pipe will be welded to the slave HDPE pipe, and the welding of the main HDPE pipe and the slave HDPE pipe is completed. After the welding is completed, the first half ring 231 is removed from the second half ring 232, so that the welded HDPE pipe can be separated from the second mounting ring 24 and the first mounting ring.

[0082] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An ultrasonic welding device suitable for HDPE pipe welding, characterized in that: It comprises an ultrasonic welding mechanism and a supporting mechanism; the supporting mechanism comprises a cylindrical supporting column, wherein an interface for dividing the supporting column into a first supporting strip, a second supporting strip and a third supporting strip is formed in the supporting column; the interface comprises a first interface, a second interface and a third interface, wherein the first interface, the second interface and the third interface intersect in a straight line to form an intersection line, and the angles between the first interface and the second interface and the third interface are all 60°; the portion of the supporting column located between the first interface and the second interface is the second supporting strip, the portion of the supporting column located between the first interface and the third interface is the third supporting strip, and the supporting column located between the second interface and the third interface is the third supporting strip. The portion between the dividing interface and the third dividing interface is the first support bar; the two end faces of the support column are respectively the starting face and the end face, one end of the intersection line is located at the center of the starting face, the other end of the intersection line is located on the end face, and the length of the intersection line between the first dividing interface and the end face is greater than the radius of the end face; the length of the intersection line between the first dividing interface and the end face is not greater than five-quarters of the radius of the end face, and not less than nine-eighths of the radius of the end face; the end of the first support bar located at the starting face of the support column is the connecting end, and a connecting plate is fixedly provided on the connecting end; the ends of the second support bar and the third support bar located at the starting face of the support column are the mounting ends, The connecting plate extends to the mounting ends of the second support bar and the third support bar, and is detachably fixedly connected to the mounting end; a threaded mounting hole is provided on the mounting ends of the second support bar and the third support bar, and a connecting rod is provided on the connecting plate corresponding to the threaded mounting hole, and the connecting rod is rotatably arranged on the connecting plate, and an external thread is provided on one end of the connecting rod facing the threaded mounting hole and is installed in the threaded mounting hole through the external thread thereon; a driving device is also provided at the connecting end of the first support bar, and the driving device is drivingly connected to the connecting rod on the connecting plate to drive the connecting rod to rotate; a mounting groove is provided on the connecting end of the first support bar, and the driving device includes a mounting groove arranged on the mounting A driving motor in a groove, a power output shaft of the driving motor extends out of the mounting groove and is installed with a first transmission gear, and an end of the connecting rod away from the threaded mounting hole is provided with a second transmission gear meshing with the first transmission gear corresponding to the first transmission gear; the ultrasonic welding mechanism comprises a frame, the frame comprises a base and a mounting seat, the mounting seat can be reciprocated along the X-axis direction and is arranged on the top of the base, the mounting seat is provided with a first mounting ring in a circular ring shape, and the axial direction of the first mounting ring is arranged along the X-axis direction; the first mounting ring comprises a first half ring and a second half ring arranged up and down, the second half ring is fixedly arranged on the mounting seat, and the first half ring is detachably arranged on the second half ring;The first mounting ring is rotatably provided with a second mounting ring in the shape of a circular ring, the second mounting ring is coaxially arranged with the first mounting ring and a notch is provided on the second mounting ring; the frame is also provided with an ultrasonic welding device, the ultrasonic welding device comprises an ultrasonic control box arranged on the mounting seat, and a welding module installed on the second mounting ring, which integrates a transducer, an amplitude transformer and a welding head, the welding module is connected to the ultrasonic control box, the welding head of the welding module is located inside the second mounting ring and its cross section is in the shape of a circular arc, and the axis of the welding head coincides with the axis of the second mounting ring; the second mounting ring is also provided with a lifting device, a support plate is fixedly provided on the power output shaft of the lifting device, the support plate is located in the second mounting ring and the support plate and the welding head are symmetrically arranged about the axis of the second mounting ring. ; 2. The ultrasonic welding equipment suitable for HDPE pipe welding according to claim 1, characterized in that: The inner side wall of the first mounting ring is provided with a circular limiting groove along its circumferential direction, and the outer side wall of the second mounting ring is provided with a plurality of rollers corresponding to the limiting groove, and the rollers are embedded in the limiting groove and are arranged to roll with the limiting groove.

3. A HDPE pipe welding process using an ultrasonic welding device suitable for HDPE pipe welding as claimed in claim 2, characterized in that: The steps include: S1. Prepare a main HDPE pipe and a slave HDPE pipe to be welded and a connecting pipe for sleeved on the end of the main HDPE pipe, wherein the inner diameter of the connecting pipe is the same as the outer diameter of the main HDPE pipe and the outer diameter of the slave HDPE pipe; S2, fixing the ultrasonic welding mechanism at a suitable position so that the second mounting ring is sleeved on the end of the main HDPE pipe, and the axis of the second mounting ring coincides with the axis of the main HDPE pipe; S3, insert the support column into the main HDPE pipe located on the inner side of the second mounting ring, and make the support column exposed to the preset length of the main HDPE pipe, then put one end of the connecting pipe on the main HDPE pipe and make the connecting pipe supported between the support plate and the welding head, and the support plate and the welding head are located at the end of the connecting pipe sleeved on the main HDPE pipe, then insert the slave HDPE pipe into the connecting pipe, and at the same time make the support column inserted into the slave HDPE pipe, and make the ends of the main HDPE pipe and the slave HDPE pipe butt against each other; S4, the lifting device drives the support plate to lift up toward the axis of the connecting pipe, applies a preset pressure f to the connecting pipe, and the welding module works at the same time. After a duration of t, the lifting device releases the drive on the support plate, and the second mounting ring rotates clockwise by an angle α, wherein the angle α is smaller than the central angle β of the welding head, and this process is repeated until the welding head rotates one circle around the connecting pipe; S5, the mounting seat moves along the X-axis direction to the point where the ends of the main HDPE pipe and the secondary HDPE pipe abut against each other, and is located between the support plate and the welding head. Then, the lifting device drives the support plate to lift up toward the axis of the connecting pipe, and applies a preset pressure f to the connecting pipe. At the same time, the welding module works. After a duration of t, the lifting device releases the drive of the support plate, and the second mounting ring rotates clockwise by an angle α, and this process is repeated until the welding head rotates one circle around the connecting pipe. S6. The mounting seat moves along the X-axis direction until the end of the connecting pipe sleeve on the slave HDPE pipe is located between the support plate and the welding head. Then, the lifting device drives the support plate to lift up toward the axis of the connecting pipe, applying a preset pressure f to the connecting pipe, and the welding module works at the same time. After a duration of t, the lifting device releases the drive of the support plate, and the second mounting ring rotates clockwise by an angle α, and repeats this process until the welding head rotates one circle around the connecting pipe. At this time, the welding of the main HDPE pipe and the slave HDPE pipe is completed.

4. The HDPE pipe welding process according to claim 3, characterized in that: Angle α is 90%-95% of angle β.

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