A surface welding adhesive device for pipe fittings

Abstract

The present invention provides a pipe fitting surface welding glue device, which includes a base, a bracket, a welding glue panel, a floating buffer mechanism, a feeding mechanism, an extruder, an inner support rotating mechanism and a plurality of motors. Among them, the bracket is arranged on the upper surface or side surface of the base; a first guide rail is horizontally arranged on the bracket, and one side surface of the welding glue panel is arranged on the first guide rail and is slidably connected to the first guide rail; a second guide rail is vertically arranged on the other side surface of the welding glue panel, and the floating buffer mechanism is arranged on the second guide rail and is slidably connected to the second guide rail; the extruder is arranged on the floating buffer mechanism; the feeding mechanism is arranged on the base and is used for conveying welding rods into the extruder; the inner support rotating mechanism is arranged on one side surface of the base and is located below the extruder; the first guide rail, the second guide rail, the feeding mechanism and the inner support rotating mechanism are respectively connected to the motors. The present invention adopts the floating buffer mechanism to make the extrusion welding head in the extruder always fit the surface of the pipe, which can effectively ensure the uniform thickness of the welding glue layer on the surface of the pipe fitting.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe fitting processing equipment, and more specifically, to a pipe fitting surface welding adhesive device. Background Art

[0002] Regarding the problem of surface welding adhesive for non-round pipe fittings, surface welding adhesive can increase the connection stability. The currently commonly used pipe fitting surface welding adhesive processing methods are as follows: one is by the way of secondary injection molding with a mold, but this method requires 2 sets of molds, the molds are complex, and there is a problem of high processing cost; the other is direct manual welding, but its surface welding effect is unstable and uneven.

[0003] In addition, a high-precision positioning device can also be used to fix the pipe fitting, and then a welding adhesive device is used to weld a layer of molten adhesive on the surface of the pipe fitting. For example, the Chinese patent with the publication number CN109127282A (publication date: January 4, 2019) proposes a pipe fitting glue coating device, which uses a fixture to clamp the pipe fitting to be coated with glue, a glue feeding mechanism sends the glue to the pipe fitting, and a driving mechanism drives a rotating shaft to drive a glue coating mechanism to rotate, and the pipe fitting is coated by a coating mechanism during rotation. However, due to the high precision requirements of surface welding adhesive for the positioning device, different molds need to be developed for different pipe fittings, and when there is a deviation in the positioning inner diameter, it is difficult to achieve a high roundness. Therefore, when the non-roundness of the pipe fitting is large, the surface welding adhesive effect is uneven, affecting the welding quality. Summary of the Invention

[0004] The present invention aims to overcome the defect that the surface welding adhesive effect is uneven when the non-roundness of the pipe fitting is large in the above-mentioned prior art, and provides a pipe fitting surface welding adhesive device.

[0005] To solve the above technical problems, the technical solution of the present invention is as follows:

[0006] A pipe fitting surface welding adhesive device, including a base, a bracket, a welding adhesive panel, a floating buffer mechanism, a feeding mechanism, an extruder, an inner support rotating mechanism and several motors, wherein: the bracket is arranged on the upper surface or side surface of the base; a first guide rail is horizontally arranged on the bracket, one side surface of the welding adhesive panel is arranged on the first guide rail and is slidably connected with the first guide rail; a second guide rail is vertically arranged on the other side surface of the welding adhesive panel, the floating buffer mechanism is arranged on the second guide rail and is slidably connected with the second guide rail; the extruder is arranged on the floating buffer mechanism; the feeding mechanism is arranged on the base, and the feeding mechanism is used to convey the welding rod to the extruder; the inner support rotating mechanism is arranged on one side surface of the base; the first guide rail, the second guide rail, the feeding mechanism and the inner support rotating mechanism are respectively connected with the motors.

[0007] During use, the pipe fitting to be welded with glue is sleeved on the outer periphery of the inner support rotating mechanism. The inner support rotating mechanism clamps the inner wall of the pipe fitting to be welded with glue under the drive of the cylinder. The first guide rail works under the drive of the motor, so that the glue welding panel and the extruder horizontally move along the first guide rail until the extruder is located above the pipe fitting to be welded with glue. The second guide rail works under the drive of the cylinder or the motor, so that the extruder connected to the floating buffer mechanism vertically moves until the extrusion welding head in the extruder is set to fit the surface of the pipe material, and the floating buffer mechanism is adjusted to make the extrusion welding head in the extruder further fit the surface of the pipe material. The feeding mechanism conveys the welding rod material into the extruder for extrusion under the drive of the motor. At the same time, the pipe fitting to be welded with glue rotates uniformly under the clamping action of the inner support rotating mechanism, and the glue welding panel horizontally moves uniformly and synchronously along the first guide rail under the drive of the motor, realizing the welding of a uniform spiral glue welding layer on the surface of the pipe fitting. During the glue welding process, the floating buffer mechanism plays a floating buffer role for the extruder, so that the extrusion welding head is always set to fit the surface of the pipe material, thereby ensuring the glue welding effect.

[0008] Preferably, the second guide rail includes two vertically arranged guide rails, and sliders are arranged on the guide rails; a lead screw is vertically arranged on the other side surface of the glue welding panel and between the second guide rails; the floating buffer mechanism includes a mounting seat, a mounting panel and an elastic buffer. The mounting seat is slidably sleeved on the lead screw, and one side surface of the mounting seat is fixedly connected to one side surface of the mounting panel through bolts and screws; one side surface of the mounting panel is fixedly connected to the slider on the second guide rail, so that the floating buffer mechanism as a whole moves freely up and down along the second guide rail; the extruder is fixedly arranged on the other side surface of the mounting panel; the elastic buffer is used to realize the floating buffer of the floating buffer mechanism in the vertical direction. One end of the elastic buffer is fixedly connected to the mounting seat through a limit screw, and the other end of the elastic buffer is provided with an adjusting nut. The adjusting nut is sleeved and fixed on the lead screw and is used to support the floating buffer mechanism as a whole; an operating handle is arranged on the lead screw, and the operating handle is used to control the adjusting nut to move up and down along the lead screw. The adjusting nut is used to support the floating buffer mechanism as a whole and move up and down along the lead screw and the second guide rail.

[0009] Preferably, the floating buffer mechanism further includes a cylinder and an induction switch. The cylinder is connected to the extruder and is used to drive the extruder and the floating buffer mechanism to move up and down along the second guide rail. When not welding glue, it drives the extruder to move up, so that the extrusion welding head is separated from the surface of the pipe fitting; the induction switch is arranged on the lower side of the mounting panel, and an induction feedback point matched with the induction switch is arranged on the adjusting nut and on the side close to the mounting panel; the induction switch is electrically connected to the driving end of the operating handle.

[0010] During use, the cylinder drives the extruder to move downward. When the extrusion welding head in the extruder is moved to be set in contact with the surface of the pipe by rotating the operating handle, continue to rotate the operating handle to make the adjusting nut move downward along the lead screw. When the surface of the pipe fitting to be welded with adhesive jacks up the extruder, when the inductive switch provided on the lower side of the mounting seat contacts the inductive feedback point provided on the adjusting nut, the inductive switch is turned on, and the operating handle is controlled to stop rotating through the inductive switch, and the floating buffer stroke adjustment is completed, that is, the position adjustment of the extruder is completed.

[0011] Preferably, a swing hinge is provided on the other side of the mounting panel, and the mounting panel is connected to the extruder through the swing hinge; a buffer spring is provided between the mounting panel and the extruder.

[0012] Preferably, the device further includes a preheating device, and the preheating device is provided on one side of the extruder and is communicated with the extrusion welding head in the extruder.

[0013] Preferably, a rubber pressing device is provided at the front end of the extrusion welding head in the extruder.

[0014] Preferably, the inner support rotating mechanism includes a three-jaw inner support rotating fixture or a four-jaw inner support rotating fixture.

[0015] Preferably, the feeding mechanism includes a stock tray, a guiding device, and a feeding driving device. The stock tray is used for storing the welding rods to be welded, and the stock tray, the guiding device, the feeding driving device, and the extruder are sequentially connected through the welding rods to be welded.

[0016] Preferably, the device further includes a programmable logic controller, and the output end of the programmable logic controller is connected to the control end of the motor.

[0017] Preferably, the device further includes a touch screen, and the output end of the touch screen is connected to the input end of the programmable logic controller.

[0018] Compared with the prior art, the beneficial effect of the technical solution of the present invention is: by adopting a floating buffer mechanism, the extruder is buffered in multiple directions, and when the non-circularity of the pipe fitting is large, the extrusion welding head in the extruder can always be kept in contact with the surface of the pipe, ensuring that the adhesive layer on the surface of the pipe fitting is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the pipe fitting surface adhesive device of Embodiment 1.

[0020] Figure 2 It is a schematic structural diagram of the floating buffer mechanism of Embodiment 2.

[0021] Figure 3 It is a partial structural schematic diagram of the floating buffer mechanism of Embodiment 2. DETAILED DESCRIPTION OF THE INVENTION

[0022] The accompanying drawings are only for illustrative purposes and should not be construed as limiting the present patent;

[0023] To better illustrate this embodiment, some components in the accompanying drawings are omitted, enlarged or reduced, which does not represent the size of the actual product;

[0024] For those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0025] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] Embodiment 1

[0027] This embodiment provides a welding glue device for the surface of pipe fittings, as Figure 1 shown, which is a schematic structural diagram of the welding glue device for the surface of pipe fittings in this embodiment.

[0028] In the welding glue device for the surface of pipe fittings provided in this embodiment, it includes a base 1, a bracket 2, a welding glue panel 3, a floating buffer mechanism 4, a feeding mechanism 5, an extruder 6, an inner support rotation mechanism 7 and several motors, wherein: the bracket 2 is vertically arranged on the upper surface or side surface of the base 1; a first guide rail 8 is horizontally arranged on the bracket 2, and one side surface of the welding glue panel 3 is arranged on the first guide rail 8 and is slidably connected to the first guide rail 8; a second guide rail 9 is vertically arranged on the other side surface of the welding glue panel 3, and the floating buffer mechanism 4 is arranged on the second guide rail 9 and is slidably connected to the second guide rail 9; the extruder 6 is arranged on the floating buffer mechanism 4; the feeding mechanism 5 is arranged on the base 1, and the feeding mechanism 5 is used to convey the welding rod into the extruder 6; the inner support rotation mechanism 7 is arranged on one side surface of the base 1 and is located below the extruder 6; the first guide rail 8, the second guide rail 9, the feeding mechanism 5, and the inner support rotation mechanism 7 are respectively connected to the motors.

[0029] In this embodiment, the first guide rail 8 and the second guide rail 9 adopt ball screws and are precisely driven by motors. Among them, the motor connected to the first guide rail 8 sets its moving speed according to the pitch of the spiral welding glue layer, thereby controlling the first guide rail 8.

[0030] In this embodiment, the inner support rotation mechanism 7 includes a three-jaw inner support rotation fixture or a four-jaw inner support rotation fixture. When in use, by replacing the lever in the inner support rotation mechanism 7, it can adapt to pipe fittings of different specifications and sizes.

[0031] In this embodiment, the device further includes a preheating device 10. The preheating device 10 is arranged on one side of the extruder 6 and is communicated with the extrusion welding head 601 in the extruder 6; the preheating device 10 preheats the surface of the pipe fitting through the extrusion welding head.

[0032] In this embodiment, a rubber pressing device 11 is provided at the front end of the extrusion welding head 601 in the extruder 6. After the welding rod rubber is extruded through the extrusion welding head 601, it is flattened by the rubber pressing device 11 while the welding rod rubber is still in a molten state, so that the welding rod rubber is firmly welded to the pipe fitting and has a uniform thickness.

[0033] In this embodiment, the feeding mechanism 5 includes a stock tray 501, a guiding device 502, and a feeding driving device 503. The stock tray 501 is used to store the welding rods to be welded. The stock tray 501, the guiding device 502, the feeding driving device 503, and the extruder 6 are sequentially connected by the welding rods to be welded to ensure the stability of the feeding during rubber welding.

[0034] In the specific implementation process, the pipe fitting to be rubber-welded is sleeved on the outer periphery of the inner support rotating mechanism 7. The inner support rotating mechanism 7 clamps the inner wall of the pipe fitting to be rubber-welded under the drive of the cylinder. The first guide rail 8 works under the drive of the motor, so that the rubber welding panel 3 and the extruder 6 move horizontally along the first guide rail 8 until the extruder 6 is located above the pipe fitting to be rubber-welded. The second guide rail 9 works under the drive of the cylinder or the motor, so that the extruder 6 connected to the floating buffer mechanism 4 moves vertically along the second guide rail 9 until the extrusion welding head 601 in the extruder 6 is arranged in contact with the surface of the pipe material; then the position of the floating buffer mechanism 4 is adjusted so that the extrusion welding head 601 in the extruder 6 is further arranged in contact with the surface of the pipe material; the feeding mechanism 5 conveys the welding rod material into the extruder 6 for extrusion under the drive of the motor. At the same time, the pipe fitting to be rubber-welded rotates uniformly under the clamping action of the inner support rotating mechanism 7, and the rubber welding panel 3 moves horizontally and synchronously along the first guide rail 8 at a uniform speed under the drive of the motor, realizing the welding of a uniform spiral rubber layer on the surface of the pipe fitting. During the rubber welding process, the floating buffer mechanism 4 plays a floating buffer role on the extruder 6, so that the extrusion welding head 601 is always arranged in contact with the surface of the pipe material, thereby ensuring the rubber welding effect.

[0035] Embodiment 2

[0036] On the basis of the pipe fitting surface rubber welding device proposed in Embodiment 1, this embodiment improves the floating buffer mechanism 4, as Figure 2 shown, which is a schematic structural diagram of the floating buffer mechanism 4 in this embodiment.

[0037] The second guide rail 9 in this embodiment includes two vertically arranged guide rails 901, and sliders 902 are arranged on the guide rails 901; a lead screw 12 is vertically arranged on the other side surface of the rubber welding panel 3 and between the second guide rails 9.

[0038] In this embodiment, the floating buffer mechanism 4 includes a mounting base 401, an elastic buffer 402, and a mounting panel 408. Among them, the mounting base 401 is slidably sleeved on the lead screw 12, and one side surface of the mounting base 401 is fixedly connected to one side surface of the mounting panel 408; one side surface of the mounting panel 408 is fixedly connected to the slider 902 on the second guide rail 9, so that the floating buffer mechanism 4 can move freely up and down along the second guide rail 9; the extruder 6 is fixedly arranged on the other side surface of the mounting panel 408;

[0039] One end of the elastic buffer 402 is connected and fixed to the mounting base 401 through a limit screw. The other end of the elastic buffer 402 is provided with an adjusting nut 403. The adjusting nut 403 is sleeved and fixed on the lead screw 12 and is used to cooperate with the mounting base 401 to support the overall movement of the floating buffer mechanism 4 in the vertical direction along the second guide rail 9.

[0040] As Figure 3 shown, it is a partial structural schematic diagram of the floating buffer mechanism 4 of this embodiment.

[0041] In this embodiment, an operating handle 13 is arranged on the lead screw 12. The operating handle 13 is used to control the up and down movement of the adjusting nut 403 along the lead screw 12, so that the adjusting nut 403 supports the overall floating buffer mechanism 4 and moves up and down along the lead screw 12 and the second guide rail 9.

[0042] In this embodiment, a swing hinge 404 is arranged at one end of the other side surface of the mounting panel 408. The mounting panel 408 and the extruder 6 are connected through the swing hinge 404; a buffer spring 405 is arranged between the mounting panel 408 and the extruder 6, which is used to realize the floating buffer of the floating buffer mechanism 4 in the swing angle direction.

[0043] In this embodiment, the floating buffer mechanism 4 further includes a cylinder 406 and an induction switch 407. Among them, the cylinder 406 is connected to the extruder 6. The cylinder 406 is used to drive the extruder 6 and the floating buffer mechanism 4 to move up and down. When the extruder 6 does not weld glue, it drives the extruder 6 to move up, so that the extrusion head is separated from the surface of the pipe fitting; the induction switch 407 is arranged on the lower side of the mounting panel 408, and an induction feedback point matched with the induction switch 407 is arranged on the adjusting nut 403; the induction switch 407 is electrically connected to the driving end of the operating handle 13.

[0044] In the specific implementation process, the pipe fittings to be welded with glue are sleeved on the outer periphery of the inner support rotating mechanism 7, and the inner support rotating mechanism 7 clamps the inner wall of the pipe fittings to be welded with glue under the drive of the cylinder. Start the motor, and the first guide rail 8 works under the drive of the motor to horizontally move the welding glue panel 3 to the starting position above the pipe fittings to be welded with glue where the extruder 6 is located. The cylinder 406 drives the extruder 6 and the floating buffer mechanism 4 to move downward until the extrusion welding head 601 in the extruder 6 presses on the surface of the pipe fittings to be welded with glue to prepare for welding glue. Adjust the floating buffer mechanism 4 well before starting. Specifically, when the extrusion welding head 601 in the extruder 6 moves to fit the surface of the pipe, continue to rotate the operating handle 13 to make the adjusting nut 403 move downward along the lead screw 12. The surface of the pipe fittings to be welded with glue jacks up the extruder 6. When the induction switch 407 arranged on the lower side of the mounting seat 401 contacts the induction feedback point arranged on the adjusting nut 403, the induction switch 407 is turned on. At this time, the rotation of the operating handle 13 is controlled to stop through the turned-on induction switch 407, that is, the position adjustment of the extruder is completed.

[0045] At this time, the adjusting nut 403 is used to support and fix the overall position of the floating buffer mechanism 4 on the lead screw 12. When the out-of-roundness of the pipe fittings to be welded with glue is relatively large, the floating buffer in the vertical direction of the extruder 6 is realized through the elastic buffer 402, so that the extrusion welding head 601 in the extruder 6 always fits the surface of the pipe. In addition, the mounting seat 401 is used to limit the floating range of the floating buffer mechanism 4 up and down, and the mounting panel 408 floats in the vertical direction along the second guide rail 9 through the fixation with the slider 902.

[0046] Under the action of the floating buffer mechanism 4, the extrusion welding head 601 in the extruder 6 always fits the surface of the pipe. The feeding mechanism 5 conveys the welding rod material into the extruder 6 for extrusion under the drive of the motor. At the same time, the pipe fittings to be welded with glue rotate uniformly under the clamping action of the inner support rotating mechanism 7, and the welding glue panel 3 moves horizontally in the reverse direction and synchronously at a uniform speed along the first guide rail 8 under the drive of the motor, so as to weld a uniform spiral welding glue layer on the surface of the pipe fittings to be welded with glue.

[0047] During the welding glue process, under the bidirectional floating buffer action of the floating buffer mechanism 4 on the extruder 6, the extrusion welding head 601 is always arranged to fit the surface of the pipe. Among them, the elastic buffer 402 realizes the floating buffer of the extruder 6 in the vertical direction, and the swing hinge 404 and the buffer spring 405 between the mounting panel 408 and the extruder 6 realize the floating buffer in the swing angle direction, so as to realize the uniform welding glue for the out-of-round pipe fittings.

[0048] Embodiment 3

[0049] On the basis of the pipe fitting surface welding glue device proposed in Embodiment 1 or Embodiment 2, this embodiment adds a programmable logic controller PLC, which is used to control the start-stop and output speed of the motor in the pipe fitting surface welding glue device.

[0050] The pipe fitting surface solder paste device in this embodiment further includes a programmable logic controller PLC and a touch screen. Among them, the output end of the touch screen is connected to the input end of the programmable logic controller PLC, and the output end of the programmable logic controller PLC is connected to the control end of the motor.

[0051] In the specific implementation process, a working instruction is input through the touch screen or the programmable logic controller PLC is controlled to adjust the start / stop of the motor and its working speed. In addition, the solder paste working parameters of all specifications of pipe fittings are stored in the programmable logic controller PLC. After the pipe fitting specification is changed, the corresponding solder paste working parameters of the pipe fitting can be directly called through the programmable logic controller PLC, and a working signal is sent to the motor to perform the solder paste operation.

[0052] The same or similar reference numerals correspond to the same or similar components;

[0053] The terms describing the positional relationship in the drawings are only for illustrative purposes and should not be construed as a limitation of this patent;

[0054] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A surface welding adhesive device for pipe fittings, characterized in that, it includes a base, a bracket, a welding adhesive panel, a floating buffer mechanism, a feeding mechanism, an extruder, an internal support rotating mechanism and several motors, wherein: the bracket is arranged on the upper surface or side surface of the base; a first guide rail is horizontally arranged on the bracket, one side surface of the welding adhesive panel is arranged on the first guide rail and is slidably connected with the first guide rail; a second guide rail is vertically arranged on the other side surface of the welding adhesive panel, the floating buffer mechanism is arranged on the second guide rail and is slidably connected with the second guide rail; the extruder is arranged on the floating buffer mechanism; the feeding mechanism is arranged on the base, and the feeding mechanism is used to convey the welding rod into the extruder; the internal support rotating mechanism is arranged on one side surface of the base and is located below the extruder; the first guide rail, the second guide rail, the feeding mechanism and the internal support rotating mechanism are respectively connected with motors; the internal support rotating mechanism clamps the pipe fitting to be welded with adhesive, the first guide rail works under the drive of the motor, so that the welding adhesive panel and the extruder horizontally move along the first guide rail until the extruder is located above the pipe fitting to be welded with adhesive, the second guide rail works under the drive of the cylinder or the motor, so that the extruder connected with the floating buffer mechanism vertically moves along the second guide rail until the extrusion welding head in the extruder fits the surface of the pipe, and the floating buffer mechanism is adjusted so that the extrusion welding head in the extruder further fits the surface of the pipe; the feeding mechanism conveys the welding rod material into the extruder for extrusion under the drive of the motor, at the same time, the internal support rotating mechanism rotates uniformly under the drive of the motor, and the welding adhesive panel horizontally moves synchronously and uniformly along the first guide rail under the drive of the motor, and a welding adhesive layer is spirally processed on the surface of the pipe fitting; the second guide rail includes 2 vertically arranged guide rails, and sliders are arranged on the guide rails; a lead screw is vertically arranged on the other side surface of the welding adhesive panel and between the second guide rails; the floating buffer mechanism includes a mounting seat, a mounting panel and an elastic buffer, wherein the mounting seat is slidably sleeved on the lead screw, and one side surface of the mounting seat is fixedly connected with one side surface of the mounting panel; one side surface of the mounting panel is fixedly connected with the slider on the second guide rail, so that the floating buffer mechanism moves up and down freely along the second guide rail; the extruder is fixedly arranged on the other side surface of the mounting panel; a swing hinge is arranged on the other side surface of the mounting panel, and the mounting panel is connected with the extruder through the swing hinge; a buffer spring is arranged between the mounting panel and the extruder; one end of the elastic buffer is fixedly connected with the mounting seat through a limit screw, the other end of the elastic buffer is provided with an adjusting nut, and the adjusting nut is sleeved and fixed on the lead screw and is used to support the floating buffer mechanism; an operating handle is arranged on the lead screw, and the operating handle is used to control the adjusting nut to move up and down along the lead screw, and the adjusting nut supports the floating buffer mechanism and moves up and down along the lead screw and the second guide rail; the floating buffer mechanism further includes a cylinder and an induction switch, and the induction switch is electrically connected with the driving end of the operating handle; the cylinder drives the extruder to move downward, and at the same time, the operating handle is rotated to move the extrusion welding head in the extruder to fit the surface of the pipe, and the operating handle is continuously rotated to make the adjusting nut continue to move downward, the surface of the pipe fitting to be welded with adhesive jacks up the extruder, when the induction switch contacts the induction feedback point, the induction switch is turned on, and the operating handle stops rotating, and the floating buffer stroke adjustment is completed.

2. The pipe fitting surface welding adhesive device according to claim 1, characterized in that: the device further includes a preheating device, and the preheating device is arranged on one side of the extruder and communicated with the extrusion welding head in the extruder.

3. The pipe fitting surface welding adhesive device according to claim 1, characterized in that: a pressure adhesive device is arranged at the front end of the extrusion welding head in the extruder.

4. The pipe fitting surface welding adhesive device according to claim 1, characterized in that: the inner support rotating mechanism includes a three-jaw inner support rotating fixture or a four-jaw inner support rotating fixture.

5. The pipe fitting surface welding adhesive device according to claim 1, characterized in that: the feeding mechanism includes a stock tray, a guiding device, and a feeding driving device. The stock tray is used for storing the welding rod to be welded, and the stock tray, the guiding device, the feeding driving device, and the extruder are sequentially connected through the welding rod to be welded.

6. The pipe fitting surface welding adhesive device according to any one of claims 1 to 5, characterized in that: the device further includes a programmable logic controller, and the output end of the programmable logic controller is connected to the control end of the motor.

7. The pipe fitting surface welding adhesive device according to claim 6, characterized in that: the device further includes a touch screen, and the output end of the touch screen is connected to the input end of the programmable logic controller.

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