Hot melting type pipeline welding machine

Abstract

The invention discloses a hot melting type pipeline welding machine which comprises a rack, a support, a cutting device and a welding device, a clamping device comprises a movable clamping seat and a fixed clamping seat, one end of the movable clamping seat is fixedly connected with a lug piece, and the lug piece is hinged to one end of the fixed clamping seat through a shaft pin; a lifting oil cylinder and a locking oil cylinder are symmetrically arranged at the two ends of the movable clamping base, a piston rod of the lifting oil cylinder is hinged to one end of the fixed clamping base through a shaft pin, a piston rod of the locking oil cylinder is connected with the other end of the fixed clamping base in a locking mode, and the splicing positions of the movable clamping base and the fixed clamping base are arranged at intervals. The movable clamping seat and the fixed clamping seat are pre-tightened and fixed through the locking oil cylinder and the lifting oil cylinder, the locking oil cylinder and the lifting oil cylinder are symmetrically arranged on the movable clamping seat, and pre-tightening force is controlled by the lifting oil cylinder and the locking oil cylinder and is distributed more uniformly, so that the situation that the movable clamping seat makes contact with the fixed clamping seat to generate stress and shorten the service life can be avoided; and the pipeline can be effectively clamped and fixed, and the pre-tightening force is larger.

Description

Technical Field

[0001] The present invention relates to the technical field of welding machines, and more particularly to a hot-melt pipe welding machine. Background Art

[0002] The utility model patent with patent number 2011204336600 discloses a hot melt butt welding machine, which includes a clamping device, a cutting device, a heating device and a follower device arranged on a frame. The clamping device includes a fixed clamping seat and a movable clamping seat. The follower device includes a bracket, a driving mechanism that can move the bracket horizontally, and a movable clamping seat swinging mechanism.

[0003] The above patent is a welding machine designed for large-size pipes, which requires a relatively large clamping force for the pipes. When the fixed clamping seat and the movable clamping seat are spliced ​​in the above patent, the two ends of the movable clamping seat are tightly fitted with the two ends of the fixed clamping seat, and are locked and fixed by the cylinders distributed on the top of the two ends of the movable clamping seat. There are certain disadvantages in actual use. The cylinder drives the end of the movable clamping seat to abut against the end of the fixed clamping seat, and a pre-tightening stress is generated between the two. The plastic strain generated at the contact end of the movable clamping seat and the fixed clamping seat is greatly increased when cutting the pipe, and it is also easy to cause displacement between the pipe and the clamping device when the two pipes are butted, thereby affecting the final fusion butt effect. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the clamping device is easily damaged and the pre-tightening force on the pipeline is insufficient, thereby providing a hot-melt pipeline welding machine with stronger pre-tightening force and longer service life.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] The cam is connected with the movable frame and the movable frame is connected with the movable frame by the movable frame, and the movable frame is connected with the movable frame by the movable frame.

[0007] Preferably: a locking rod is installed at the end of the piston rod of the locking cylinder, and the locking rod and the piston rod of the locking cylinder are arranged in a T shape. The fixed clamping seat is provided with a clamping joint at one end for cooperating with the locking cylinder, and the clamping joint is provided with an avoidance opening for the locking rod to be extended and retracted and an opening groove for the locking rod to be raised and lowered, and the opening groove is communicated with the avoidance opening.

[0008] Preferably: the plurality of clamping devices are divided into a dynamic clamping group and a static clamping group, the dynamic clamping group is installed on the cylinder barrel of the clamping oil cylinder, the static clamping group is installed on the piston rod of the clamping oil cylinder, and a connecting rod is installed between two adjacent clamping devices in the dynamic clamping group;

[0009] The bracket is provided with a slide rail, which extends along the length direction of the clamping cylinder, and the clamping devices in the dynamic clamping group are all slidably connected to the slide rail.

[0010] Preferably: it also includes a translation device, which includes a translation cylinder, a slide and a slideway, the slideway is installed on the frame and extends along the length direction of the translation cylinder and the clamping cylinder, the slideway is slidably connected to the slideway, the cylinder barrel of the translation cylinder is connected to the frame, and its piston rod is connected to the slideway, and the cutting device and the welding device are both installed on the slideway.

[0011] Preferably: the cutting device includes a cutter disc body and a cutting cylinder for driving the cutter disc body to flip, the cutter disc body is placed on a bracket when cutting a pipe, one end of which is hinged to the slide seat axle pin, the cylinder barrel of the cutting cylinder is connected to the slide seat, and its piston rod is hinged to the cutter disc body axle pin.

[0012] Preferably: the heating device includes a weld cake body and a heating cylinder for driving the weld cake body to flip, the weld cake body is placed on a bracket when hot-melting a pipe, one end of which is hinged to the slide seat axle pin, the cylinder barrel of the heating cylinder is connected to the slide seat, and its piston rod is hinged to the weld cake body axle pin.

[0013] Preferably: the heating device further comprises a shield for covering the solder cake body, and the bottom end of the shield is connected to the slide seat.

[0014] Preferably: positioning mechanisms are provided at both ends of the solder cake body, and the positioning mechanisms include a positioning cavity seat, a positioning plate and a positioning rod. The positioning cavity seat is fixed on the side wall of the solder cake body, and the positioning rod is movably connected between the dynamic clamp group and the static clamp group. The positioning plate is sleeved on the positioning rod and is used to clamp into the positioning cavity seat.

[0015] Preferably: it also includes a mobile carrier, the bracket is installed on the mobile carrier, and a trusteeship mechanism installed on the mobile carrier is provided at both ends of the bracket, the trusteeship mechanism includes a trusteeship body and a trusteeship cylinder for driving the trusteeship body to flip, one end of the trusteeship body is hinged to the mobile carrier axle pin, the cylinder barrel of the trusteeship cylinder is hinged to the mobile carrier axle pin, and its piston rod is hinged to the bottom axle pin of the free end of the trusteeship body.

[0016] Preferably, the movable clamping seat and the fixed clamping seat are both formed by welding plates.

[0017] The beneficial effects of the present invention are as follows: the splicing positions of the movable clamping seat and the fixed clamping seat are arranged at intervals, and then pre-tightened and fixed by means of the locking cylinder and the lifting cylinder. The locking cylinder and the lifting cylinder are symmetrically arranged on the movable clamping seat, and the pre-tightening force is controlled by the lifting cylinder and the locking cylinder, and the distribution is more uniform, which can avoid the contact between the movable clamping seat and the fixed clamping seat to generate stress and reduce the service life, and can effectively clamp and fix the pipeline, and the pre-tightening force is greater. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of hot melt pipe welding machine Figure 1 ;

[0019] Figure 2 Schematic diagram of hot melt pipe welding machine Figure 2 ;

[0020] Figure 3 is an assembly diagram of a plurality of clamping devices;

[0021] Figure 4 is a schematic diagram of a clamping device;

[0022] Figure 5 is a schematic diagram of a welding device;

[0023] Figure 6 is a schematic diagram of a cutting device;

[0024] Figure 7 A schematic diagram of a custodian institution;

[0025] In the figure: 1. frame; 2. bracket; 21. connecting rod; 22. side plate; 23. cross plate; 231. slide rail; 24. clamping cylinder; 3. cutting device; 31. cutter head body; 32. cutting cylinder; 4. welding device; 41. welding cake body; 42. heating cylinder; 43. shield; 5. clamping device; 51. movable clamping seat; 52. fixed clamping seat; 521. card joint; 53. locking cylinder; 531. locking rod; 54. lifting cylinder; 6. trusteeship mechanism; 61. trusteeship body; 611. roller; 62. trusteeship cylinder; 7. translation device; 71. translation cylinder; 72. slide seat; 73. slideway; 8. positioning mechanism; 81. positioning cavity seat; 82. positioning plate; 83. positioning rod; 9. movable carrier. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0028] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0029] according to Figure 1-2 As shown, a hot-melt pipe welding machine includes a frame 1 and a bracket 2 installed on the frame 1, a cutting device 3 and a welding device 4. Four clamping devices 5 are installed on the bracket 2. The four clamping devices 5 are divided into two groups. The distance between the two groups of clamping devices 5 is controlled by a clamping oil cylinder 24. The clamping device 5 includes a movable clamping seat 51 and a fixed clamping seat 52. The movable clamping seat 51 and the fixed clamping seat 52 are spliced ​​to form a pipe clamping area for accommodating a pipe. The bottom end of the fixed clamping seat 52 is fixed on the frame 1, and one end of the movable clamping seat 51 is fixed to the frame 1. An ear piece is fixedly connected, one end of the fixed clamping seat 52 is hinged with the ear piece axis pin to form a hinged end, and a lifting cylinder 54 and a locking cylinder 53 are symmetrically arranged at both ends of the movable clamping seat 51. The tail end of the cylinder barrel of the lifting cylinder 54 is hinged with the axis pin of the movable clamping seat 51, and its piston rod is hinged with the axis pin of the hinged end of the fixed clamping seat 52. The tail end of the cylinder barrel of the locking cylinder 53 is hinged with the axis pin of the movable clamping seat 51, and its piston rod is locked and connected with the other end of the fixed clamping seat 52. The movable clamping seat 51 and the fixed clamping seat 52 are arranged at intervals at the joint.

[0030] according to Figure 1-2 As shown, the splicing positions of the movable clamping seat 51 and the fixed clamping seat 52 are arranged at intervals, and then pre-tightened and fixed by the locking cylinder 53 and the lifting cylinder 54. The locking cylinder 53 and the lifting cylinder 54 are symmetrically arranged on the movable clamping seat 51. The pre-tightening force is controlled by the lifting cylinder 54 and the locking cylinder 53, and the distribution is more uniform, which can avoid the contact between the movable clamping seat 51 and the fixed clamping seat 52 to generate stress and reduce the service life, and can effectively clamp and fix the pipeline with greater pre-tightening force.

[0031] according to Figure 3 As shown, the four clamping devices 5 are evenly divided into a dynamic clamping group and a static clamping group. The dynamic clamping group is installed on the cylinder barrel of the clamping oil cylinder 24 and is distributed at intervals. The static clamping group is installed on the piston rod of the clamping oil cylinder 24 and is also distributed at intervals. A connecting rod 21 is installed between two adjacent clamping devices 5 in the dynamic clamping group to ensure that the distance between the two clamping devices 5 in the dynamic clamping group is inconvenient. A slide rail 231 is provided on the bracket 2. The slide rail 231 extends along the length direction of the clamping oil cylinder 24. The clamping devices 5 in the dynamic clamping group are all slidably connected to the slide rail 231. The setting of the slide rail 231 is used to guide the dynamic clamping group on the one hand, and on the other hand, to prevent the cylinder barrel and piston rod of the clamping oil cylinder 24 from being radially deformed when the dynamic clamping group cooperates with the static clamping group to extrude the pipeline, thereby extending the service life of the clamping oil cylinder 24. Because the present invention is mainly used for the melting welding of large-sized pipelines, the pressure is relatively large, and it is easy to produce radial deformation after long-term use by relying solely on the rigidity of the clamping oil cylinder 24 itself.

[0032] according to Figure 4 As shown, the movable clamping seat 51 and the fixed clamping seat 52 are both formed by welding plates. Taking the movable clamping seat 51 as an example, it is composed of two main steel plates arranged in parallel and spaced apart, and a plurality of reinforcing plates are spaced apart between the two main steel plates, wherein the lifting cylinder 54 will pass through one of the reinforcing plates, and a through slot is provided on the reinforcing plate for the lifting cylinder 54 to swing. The provision of the through slot not only allows the lifting cylinder 54 to move, but also limits the swing amplitude of the lifting cylinder 54, so as to avoid the lifting cylinder 54 swinging too much and causing the movable clamping seat 51 to be unable to reset. In addition, a floating plate is welded on the cylinder barrel of the locking cylinder 53, and a floating groove is provided on the floating plate, and a pin rod is inserted into the floating groove, and the end of the pin rod is fixedly connected to the main steel plate, and the pin rod cooperates with the floating plate to limit the swing amplitude and swing direction of the locking cylinder 53, so as to avoid the piston rod of the locking cylinder 53 shrinking and detaching from the clamping joint 521 when the locking rod 531 cooperates with the clamping joint 521.

[0033] according to Figure 3As shown, a locking rod 531 is installed at the end of the piston rod of the locking oil cylinder 53, and the locking rod 531 and the piston rod of the locking oil cylinder 53 are arranged in a T shape. A clamping joint 521 is provided at one end of the fixed clamping seat 52 for cooperating with the locking oil cylinder 53. The clamping joint 521 is provided with an escape opening for the locking rod 531 to be extended and retracted and an opening groove for the locking rod 531 to be lifted and lowered, and the opening groove is communicated with the escape opening. A connecting hole is provided at the middle position of the length of the locking rod 531, and the locking rod 531 is sleeved on the piston rod of the locking oil cylinder 53 through the connecting hole. A clamping ring is installed at the end of the piston rod of the locking oil cylinder 53, so as to ensure that the locking rod 531 is fixedly connected to the piston rod of the locking oil cylinder 53. In addition, the locking rod 531 can also be threadedly connected to the piston rod of the locking oil cylinder 53, and then a clamping ring or a nut is connected to the end of the piston rod.

[0034] according to Figure 3-4 As shown, the bracket 2 is welded on the frame 1, and the bracket 2 includes a side plate 22 and a cross plate 23, and the slide rail 231 is installed on the cross plate 23. Figure 3 Taking the orientation as an example, the four clamping devices 5 are called the first clamping device, the second clamping device, the third clamping device and the fourth clamping device from left to right. One end of the cross plate 23 is fixedly connected to the side plate 22. The side plate 22 is arranged on the other side of the first clamping device relative to the second clamping device. The other end of the cross plate 23 is fixedly connected to the third clamping device. The first clamping device and the second clamping device slide on the cross plate 23. The clamping cylinder 24 is a rodless cylinder, and the two ends of its piston rod protrude from the two ends of the cylinder barrel respectively. The bottom ends of the third clamping device and the fourth clamping device are fixed on the frame 1. One end of the piston rod of the clamping cylinder 24 is fixedly connected to the side plate 22, and the other end is fixedly connected to the fixed clamping seat 52 of the fourth clamping device. It should be noted here that the four clamping devices 5 are coaxially arranged, and the bottom ends of the third clamping device and the fourth clamping device are both installed with pads to ensure that they are at the same height as the first clamping device and the second clamping device.

[0035] according to Figure 5 As shown, the heating device includes a solder paste body 41, a shield 43 for covering the solder paste body 41, and a heating oil cylinder 42 for driving the solder paste body 41 to flip. The solder paste body 41 is placed on the bracket 2 when hot-melting the pipe, and one end of the solder paste body 41 is hinged with the axle pin of the slide seat 72. The cylinder barrel of the heating oil cylinder 42 is connected to the slide seat 72, and its piston rod is hinged with the axle pin of the solder paste body. The bottom end of the shield 43 is connected to the slide seat 72. The shield 43 is provided with an opening for the solder paste body 41 to enter and exit on one side of the bracket 2. When the solder paste body 41 melts the pipe, it still has a certain amount of heat. The setting of the shield 43 can effectively prevent the solder paste body 41 with residual heat from accidentally injuring the operator, or other flammable items from contacting the solder paste body 41. A plurality of coaxial electric heating pipes are arranged in the solder paste body 41, which conduct electricity to the electric heating pipes so that the solder paste body 41 is heated to the required temperature. In addition, the solder paste body 41 is coated with an anti-adhesion coating made of Teflon coating.

[0036] according to Figure 6 As shown, the cutting device 3 includes a cutter body 31 and a cutting oil cylinder 32 for driving the cutter body 31 to flip. The cutter body 31 is placed on the bracket 2 when cutting the pipe, and one end of the cutter body 31 is hinged with the slide seat 72. The cylinder barrel of the cutting oil cylinder 32 is connected to the slide seat 72, and its piston rod is hinged with the cutter body 31. Blades are installed on the turntables on both sides of the cutter body 31. The turntable is driven to rotate by a private service motor with a reducer, and the transmission method is belt drive. A speed sensor in contact with the belt is installed in the cutter body 31. The speed sensor is electrically connected to the private service motor. Because the cutter body 31 is buried between the two pipes when working, the rotation of the turntable cannot be directly seen by the naked eye, so the rotation of the private service motor is controlled by the speed sensor to achieve a more accurate and stable cutting effect.

[0037] The cylinder barrels of the cutting oil cylinder 32 and the heating oil cylinder 42 are both hinged to the axle pin of the slide seat 72 near the top, thereby reducing the swing space of the cylinder barrels of the cutting oil cylinder 32 and the heating oil cylinder 42.

[0038] according to Figure 1-6 As shown, the translation device 7 includes a translation cylinder 71, a slide 72 and a slideway 73. The slideway 73 is installed on the frame 1 and extends along the length direction of the translation cylinder 71 and the clamping cylinder 24. The slide 72 is slidably connected to the slideway 73. The cylinder barrel of the translation cylinder 71 is connected to the frame 1, and its piston rod is connected to the slide 72. The cutting device 3 and the welding device 4 are both installed on the slide 72. The structure is simple and the operation accuracy is also guaranteed. The two ends of the welding cake body 41 are provided with a positioning mechanism 8. The positioning mechanism 8 includes a positioning cavity seat 81, a positioning plate 82 and a positioning rod 83. The positioning cavity seat 81 is fixed on the side wall of the welding cake body 41. The positioning rod 83 is movably connected between the dynamic clamp group and the static clamp group. The positioning plate 82 is sleeved on the positioning rod 83 and is used to clamp the positioning cavity seat 81. Since the solder cake body 41 is much thinner than the cutter disc body 31 , it is easy to tilt when the solder cake body 41 is placed on the bracket 2 . The positioning mechanism 8 can effectively prevent the solder cake body 41 from tilting.

[0039] according to Figure 1-7As shown, the bracket 2 is fixed on the mobile carrier 9, and a trustee mechanism 6 installed on the mobile carrier 9 is provided at both ends of the bracket 2. The trustee mechanism 6 includes a trustee body 61 and a trustee cylinder 62 for driving the trustee body 61 to flip. One end of the trustee body 61 is hinged to the mobile carrier 9 axle pin, and the cylinder barrel of the trustee cylinder 62 is hinged to the mobile carrier 9 axle pin, and its piston rod is hinged to the free end bottom axle pin of the trustee body 61. The mobile carrier 9 includes a frame and wheels installed around the frame. The rear two wheel hubs are rotatably connected to the frame, and the front two wheel hubs can rotate in direction. The structure of the rotation direction is introduced in another application, and will not be repeated in this application. A pull rod is installed in front of the frame to pull the frame to move. Two rollers 611 are installed at the free end of the trustee body 61. The two rollers 611 are arranged in a V shape to generate rolling friction with the outer wall of the pipe. The trustee mechanism 6 is arranged to ensure that the two welded pipes are in the same straight line and make it easier for the clamping cylinder 24 to drive the dynamic clamping group to move. In this application, the frame is used as the frame 1, and the welding device 4, the cutting device 3, the clamping device 5, and the trustee mechanism 6 are all installed on the mobile carrier 9, which is also relatively convenient to move as a whole.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hot-melt pipe welding machine, comprising a frame (1), a bracket (2) mounted on the frame (1), a cutting device (3) and a welding device (4), wherein a plurality of clamping devices (5) are mounted on the bracket (2), the plurality of clamping devices (5) are divided into two groups, and the spacing between the two groups of clamping devices (5) is controlled by a clamping oil cylinder (24), wherein: The clamping device (5) comprises a movable clamping seat (51) and a fixed clamping seat (52). The movable clamping seat (51) and the fixed clamping seat (52) are spliced ​​to form a pipe clamping area for accommodating pipes. One end of the movable clamping seat (51) is fixedly connected to an ear piece, and is hinged to one end of the fixed clamping seat (52) through an axial pin. The two ends of the movable clamping seat (51) are symmetrically provided with a lifting cylinder (54) and a locking cylinder (53). The cylinder barrel of the lifting cylinder (54) is movably connected to the movable clamping seat (51), and its piston rod is hinged to one end of the fixed clamping seat (52). The cylinder barrel of the locking cylinder (53) is movably connected to the movable clamping seat (51), and its piston rod is locked to the other end of the fixed clamping seat (52). The movable clamping seat (51) and the fixed clamping seat (52) are spaced apart at the splicing point.

2. The hot melt pipe welding machine according to claim 1 is characterized in that: A locking rod (531) is installed at the end of the piston rod of the locking oil cylinder (53), and the locking rod (531) and the piston rod of the locking oil cylinder (53) are arranged in a T shape. One end of the fixed clamping seat (52) used for cooperating with the locking oil cylinder (53) is provided with a clamping joint (521), and the clamping joint (521) is provided with an avoidance opening for the locking rod (531) to be extended and retracted and an opening groove for the locking rod (531) to be lifted and lowered, and the opening groove is communicated with the avoidance opening.

3. The hot melt pipe welding machine according to claim 2 is characterized in that: The plurality of clamping devices (5) are divided into a dynamic clamping group and a static clamping group, the dynamic clamping group is mounted on the cylinder barrel of the clamping oil cylinder (24), the static clamping group is mounted on the piston rod of the clamping oil cylinder (24), and a connecting rod (21) is installed between two adjacent clamping devices (5) in the dynamic clamping group; The bracket (2) is provided with a slide rail (231), the slide rail (231) extends along the length direction of the clamping oil cylinder (24), and the clamping devices (5) in the dynamic clamping group are all slidably connected to the slide rail (231).

4. The hot melt pipe welding machine according to claim 3 is characterized in that: The invention also comprises a translation device (7), wherein the translation device (7) comprises a translation cylinder (71), a slide seat (72) and a slideway (73), wherein the slideway (73) is mounted on the frame (1) and extends along the length direction of the translation cylinder (71) and the clamping cylinder (24), wherein the slide seat (72) is slidably connected to the slideway (73), wherein the cylinder barrel of the translation cylinder (71) is connected to the frame (1), and the piston rod thereof is connected to the slide seat (72), and the cutting device (3) and the welding device (4) are both mounted on the slide seat (72).

5. The hot melt pipe welding machine according to claim 4 is characterized in that: The cutting device (3) comprises a cutter disc body (31) and a cutting oil cylinder (32) for driving the cutter disc body (31) to flip. When cutting a pipe, the cutter disc body (31) is placed on a bracket (2), one end of which is hinged to a shaft pin of a slide seat (72). The cylinder barrel of the cutting oil cylinder (32) is connected to the slide seat (72), and its piston rod is hinged to the shaft pin of the cutter disc body (31).

6. The hot melt pipe welding machine according to claim 5 is characterized in that: The heating device comprises a welding cake body (41) and a heating oil cylinder (42) for driving the welding cake body (41) to flip. The welding cake body (41) is placed on a bracket (2) when hot-melting a pipe, and one end of the welding cake body is hinged to an axle pin of a slide seat (72). The cylinder barrel of the heating oil cylinder (42) is connected to the slide seat (72), and its piston rod is hinged to the axle pin of the welding cake body.

7. The hot melt pipe welding machine according to claim 6 is characterized in that: The heating device further comprises a shield (43) for covering the solder cake body (41), and the bottom end of the shield (43) is connected to the slide seat (72).

8. The hot melt pipe welding machine according to claim 7 is characterized in that: Both ends of the solder cake body (41) are provided with positioning mechanisms (8), and the positioning mechanisms (8) include a positioning cavity seat (81), a positioning plate (82) and a positioning rod (83). The positioning cavity seat (81) is fixed on the side wall of the solder cake body (41), and the positioning rod (83) is movably connected between the dynamic clamping group and the static clamping group. The positioning plate (82) is sleeved on the positioning rod (83) and is used to be clamped in the positioning cavity seat (81).

9. The hot melt pipe welding machine according to claim 8, characterized in that: It also includes a mobile carrier (9), the bracket (2) is installed on the mobile carrier (9), and a trustee mechanism (6) installed on the mobile carrier (9) is provided at both ends of the bracket (2), the trustee mechanism (6) includes a trustee body (61) and a trustee oil cylinder (62) for driving the trustee body (61) to flip, one end of the trustee body (61) is hinged to the mobile carrier (9) axle pin, the cylinder barrel of the trustee oil cylinder (62) is hinged to the mobile carrier (9) axle pin, and its piston rod is hinged to the free end bottom axle pin of the trustee body (61).

10. The hot melt pipe welding machine according to claim 9, characterized in that: The movable clamping seat (51) and the fixed clamping seat (52) are both formed by welding plates.

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