Welding method of polyvinyl chloride electric hot melting pipe fitting for water supply

Abstract

The invention relates to the technical field of electric melting pipe fittings, in particular to a welding method of a polyvinyl chloride electric hot melting pipe fitting for water supply. When the electric melting pipe fitting body is in butt joint with a plastic pipe, the plastic pipe needing to be welded at the two ends is held and positioned through the first hoop mechanism and the second hoop mechanism, the first hoop mechanism and the second hoop mechanism synchronously and oppositely move by driving the two-way lead screw to rotate, the binding post is powered on in the moving process, and the electric melting pipe fitting body is in butt joint with the plastic pipe. The plastic pipe and the electric melting pipe fitting body move while being subjected to hot melting, so that the plastic pipe and the electric melting pipe fitting body are welded in a moving friction state, and compared with an original mode that the plastic pipe needs to be hammered to be in interference fit with the electric melting pipe fitting body before electric melting manually, the plastic pipe can be in butt joint with the electric melting pipe fitting efficiently and accurately, and the sealing performance of the connecting position can be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of electric melting pipe fittings, in particular to a welding method of polyvinyl chloride electric hot melting pipe fittings for water supply. Background Art

[0002] Common methods for plastic pipe welding are hot melting and electric melting. Electric melting uses electric melting pipe fittings, such as polyvinyl chloride electric melting pipe fittings. Electric melting pipe fittings are equipped with electric heating wires inside to connect to external terminals. When two pipes need to be connected by electric melting, the outer side of the end of the plastic pipe needs to be polished off the oxide layer and then inserted into the port of the electric melting pipe fitting. In order to ensure the sealing of the connection between the electric melting pipe fitting and the plastic pipe, the electric melting pipe fitting and the end of the corresponding plastic pipe are usually interference fit. Therefore, when connecting the electric melting pipe fitting and the plastic pipe, it is necessary to use a hammer to knock the electric melting pipe fitting and the plastic pipe to make them fit tightly.

[0003] However, this connection method is time-consuming and labor-intensive, and it is still difficult to ensure that the connection between the electric fusion pipe fittings and the plastic pipe is in place. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method for welding polyvinyl chloride electric hot-melt pipe fittings for water supply, so that the plastic pipe can be efficiently and accurately connected with the electric hot-melt pipe fittings to ensure the sealing of the connection.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] The welding method of polyvinyl chloride electric hot-melt pipe fittings for water supply is based on the electric hot-melt pipe fitting body and the plastic pipe;

[0007] The electrofusion pipe body comprises a first bracket, a second bracket, an electrofusion pipe body, a bidirectional screw rod, a first clamp mechanism, a guide shaft, a second clamp mechanism and a driving mechanism;

[0008] The two ends of the bidirectional screw are rotatably connected to the first bracket and the second bracket respectively, and the axial direction of the bidirectional screw is the X direction; a non-threaded section is provided in the middle of the bidirectional screw;

[0009] The main body of the electric fusion pipe is provided with a connecting through hole with an axial direction in the X direction, and a heating wire is arranged at a position near the X-direction end and the reverse end of the X direction on the inner wall of the connecting through hole; the outer wall of the electric fusion pipe is provided with a terminal electrically connected to the heating wire;

[0010] The main body of the electrofusion pipe fitting is rotatably connected to the non-threaded section of the bidirectional screw rod via a bearing;

[0011] The driving mechanism is in transmission connection with the bidirectional screw rod and is used to drive the bidirectional screw rod to rotate;

[0012] The two ends of the guide shaft are fixedly connected to the first bracket and the second bracket respectively, and the axial direction of the guide shaft is the X direction; the main body of the electric fusion pipe is fixedly connected to the middle part of the guide shaft, and the axis of the guide shaft, the axis of the bidirectional screw rod and the axis of the connecting through hole of the capacitor pipe body are located in the same plane;

[0013] The first clamp mechanism comprises a first clamp arm and a second clamp arm which are pivotally connected to each other. A threaded sleeve which is threadably matched with a threaded section of a bidirectional screw rod is provided at the pivotal joint of the first clamp arm and the second clamp arm. The threaded sleeve is coaxially sleeved on the bidirectional screw rod. An arc-shaped notch which is clearance-matched with the outer diameter of the guide shaft is provided at the clamping part of the first clamp arm and the second clamp arm. When the first clamp arm and the second clamp arm are mutually clamped, the arc-shaped notch forms a limiting hole which is coaxially sleeved on the outside of the guide shaft, so that an clamping hole which is interference-matched with the outer wall of the plastic pipe is formed on the inner side thereof.

[0014] The second clamp mechanism and the first clamp mechanism are mirror images of each other;

[0015] The welding method comprises the following steps:

[0016] The control driving mechanism drives the bidirectional screw rod to rotate, so that the first clamp mechanism and the second clamp mechanism move synchronously in opposite directions, so that the first clamp mechanism is close to the first bracket, and the second clamp mechanism is close to the second bracket;

[0017] The two plastic pipes are respectively connected to the holding holes of the first holding hoop mechanism and the holding holes of the second holding hoop mechanism by interference fit, and the first holding hoop mechanism and the second holding hoop mechanism are locked and fixed;

[0018] The control driving mechanism drives the bidirectional screw rod to rotate in the opposite direction, so that the first clamp mechanism and the second clamp mechanism move synchronously in opposite directions, and the terminal is powered at the same time. After the two plastic pipes are inserted into the connecting through hole of the electric fusion pipe fitting body for a certain distance, the control driving mechanism stops, and the fusion is completed.

[0019] Furthermore, in the above-mentioned method for welding polyvinyl chloride electric hot-melt pipe fittings for water supply, a ring-shaped limiting convex edge is provided in the middle of the inner wall of the connecting through hole of the electric hot-melt pipe fitting body;

[0020] In the welding method, "until the two plastic pipes are inserted into the connecting through holes of the electric fusion pipe fitting body for a certain distance, the driving mechanism is controlled to stop" specifically means: until the ends of the two plastic pipes abut against the limiting convex edge, the driving mechanism is controlled to stop.

[0021] Furthermore, in the above-mentioned welding method of polyvinyl chloride electric hot-melt pipe fittings for water supply, the shape of the first bracket is a U-shape formed by vertically connecting two vertical rods and a horizontal rod, the shape of the second bracket is the same as that of the first bracket, and the horizontal rod parts of the first bracket and the second bracket are supported on the ground.

[0022] Further, in the above-mentioned method for welding polyvinyl chloride electric hot-melt pipe fittings for water supply, the driving mechanism includes a driving shaft, a first bevel gear and a second bevel gear;

[0023] The first bevel gear is coaxially sleeved on the non-threaded section in the middle of the bidirectional screw rod, the two ends of the drive shaft are rotatably connected between the electric fusion pipe body and the second bracket, the second bevel gear is coaxially connected to the drive shaft, and the second bevel gear is meshed with the first bevel gear;

[0024] Furthermore, in the above-mentioned method for welding polyvinyl chloride electric hot-melt pipe fittings for water supply, the axial direction of the driving shaft is the X direction.

[0025] Furthermore, in the above-mentioned method for welding polyvinyl chloride electric hot-melt pipe fittings for water supply, a rotating hand wheel is connected to the end of the driving shaft.

[0026] The beneficial effect of the present invention is that when the electric fusion pipe fitting body and the plastic pipe are butt-jointed, the first clamp mechanism and the second clamp mechanism are respectively used to clamp and position the plastic pipes at both ends that need to be welded, and the first clamp mechanism and the second clamp mechanism are synchronously moved toward each other by driving the bidirectional screw rod to rotate. During the movement, the terminal is energized, and the plastic pipe and the electric fusion pipe fitting body move while being hot-melted, so that the two are welded under the moving friction state. Compared with the original method of manually hammering the plastic pipe to make an interference fit with the electric fusion pipe fitting body before electric fusion, the plastic pipe can be efficiently and accurately butt-jointed with the electric fusion pipe fitting, and the sealing of the connection can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a polyvinyl chloride electric hot-melt pipe fitting for water supply from a first perspective according to a specific embodiment of the present invention;

[0028] Figure 2 It is a structural schematic diagram of a polyvinyl chloride electric hot-melt pipe fitting for water supply from a second perspective according to a specific embodiment of the present invention;

[0029] Figure 3 A bottom view of a polyvinyl chloride electric hot-melt pipe fitting for water supply according to a specific embodiment of the present invention;

[0030] Figure 4 for Figure 3 AA cross-section diagram;

[0031] Description of labels:

[0032] 1. The first bracket;

[0033] 2. The second bracket;

[0034] 3. Electric fusion pipe fitting body; 31. Connecting through hole; 32. Heating wire; 33. Terminal post; 34. Position limiting convex edge;

[0035] 4. Driving mechanism; 41. Driving shaft; 42. First bevel gear; 43. Second bevel gear; 44. Rotating hand wheel;

[0036] 5. Guide shaft;

[0037] 6. first hoop mechanism; 61. first arm; 62. second arm; 63. arc-shaped notch;

[0038] 7. The second clamp mechanism. DETAILED DESCRIPTION

[0039] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0040] Please refer to Figures 1 to 4 , the specific embodiment of the present invention relates to a method for welding polyvinyl chloride electric hot-melt pipe fittings for water supply, based on the electric hot-melt pipe fitting body and the plastic pipe;

[0041] The electrofusion pipe body comprises a first bracket 1, a second bracket 2, an electrofusion pipe body 3, a bidirectional screw rod, a first clamp mechanism 6, a guide shaft 5, a second clamp mechanism 7 and a driving mechanism 4;

[0042] The two ends of the bidirectional screw are rotatably connected to the first bracket 1 and the second bracket 2 respectively, and the axial direction of the bidirectional screw is the X direction; a non-threaded section is provided in the middle of the bidirectional screw;

[0043] The electrofusion pipe body 3 is provided with a connecting through hole 31 with an axial direction in the X direction, and a heating wire 32 is arranged on the inner wall of the connecting through hole 31 near the X-direction end and near the X-direction reverse end; the outer wall of the electrofusion pipe is provided with a terminal 33 electrically connected to the heating wire 32;

[0044] The electrofusion pipe fitting body 3 is rotatably connected to the non-threaded section of the bidirectional screw rod through a bearing;

[0045] The driving mechanism 4 is connected to the bidirectional screw rod for driving the bidirectional screw rod to rotate;

[0046] The two ends of the guide shaft 5 are fixedly connected to the first bracket 1 and the second bracket 2 respectively, and the axial direction of the guide shaft 5 is the X direction; the electric fusion pipe body 3 is fixedly connected to the middle of the guide shaft 5, and the axis of the guide shaft, the axis of the bidirectional screw rod and the axis of the connecting through hole 31 of the capacitor pipe body are located in the same plane;

[0047] The first clamp mechanism 6 comprises a first clamp arm 61 and a second clamp arm 62 which are pivotally connected to each other. A threaded sleeve which is threadably matched with the threaded section of the bidirectional screw is provided at the pivotal joint of the first clamp arm 61 and the second clamp arm 62. The threaded sleeve is coaxially sleeved on the bidirectional screw. An arc-shaped notch 63 which is clearance-matched with the outer diameter of the guide shaft 5 is provided at the clamping part of the first clamp arm 61 and the second clamp arm 62. When the first clamp arm 61 and the second clamp arm 62 are mutually clamped, the arc-shaped notch 63 forms a limiting hole which is coaxially sleeved on the outside of the guide shaft 5, so that the inner side thereof forms a clamping hole which is interference-matched with the outer wall of the plastic pipe.

[0048] The second clamp mechanism 7 and the first clamp mechanism 6 are mirror images of each other;

[0049] The welding method comprises the following steps:

[0050] The control driving mechanism 4 drives the bidirectional screw rod to rotate, so that the first clamp mechanism 6 and the second clamp mechanism 7 move synchronously in opposite directions, so that the first clamp mechanism 6 is close to the first bracket 1, and the second clamp mechanism 7 is close to the second bracket 2;

[0051] The two plastic pipes are respectively connected to the holding holes of the first holding hoop mechanism 6 and the holding holes of the second holding hoop mechanism 7 by interference fit, and the first holding hoop mechanism and the second holding hoop mechanism 7 are locked and fixed;

[0052] The control driving mechanism 4 drives the bidirectional screw rod to rotate in the opposite direction, so that the first clamp mechanism 6 and the second clamp mechanism 7 move synchronously in opposite directions, and at the same time, the terminal 33 is powered until the two plastic pipes are inserted into the connecting through hole 31 of the electric fusion pipe fitting body 3 for a certain distance, and then the control driving mechanism 4 stops, and the fusion is completed.

[0053] In the above embodiment, both ends of the connecting through hole 31 are chamfered to facilitate smooth docking with the plastic pipe end;

[0054] In the above embodiment, when the electric fusion pipe fitting body and the plastic pipe are butt-jointed, the first clamp mechanism 6 and the second clamp mechanism 7 are respectively used to clamp and position the plastic pipes at both ends that need to be welded, and the first clamp mechanism 6 and the second clamp mechanism 7 are driven to rotate so that the two-way screw rod is synchronously moved toward each other, and the terminal 33 is energized during the movement, so that the plastic pipe and the electric fusion pipe fitting body are moved while being hot-melted, so that the two are welded under the moving friction state. Compared with the original method of manually hammering the plastic pipe to make an interference fit with the electric fusion pipe fitting body before electric fusion, the plastic pipe can be efficiently and accurately butt-jointed with the electric fusion pipe fitting, and the sealing of the connection can be ensured.

[0055] As a preferred embodiment, a ring-shaped limiting convex edge 34 is provided in the middle of the inner wall of the connecting through hole 31 of the electrofusion pipe body 3;

[0056] “Until the two plastic pipes are inserted into the connecting through hole 31 of the electrofusion pipe fitting body 3 for a certain distance, the driving mechanism 4 is controlled to stop” specifically means: until the ends of the two plastic pipes abut against the limiting convex edge 34, the driving mechanism 4 is controlled to stop.

[0057] In the above embodiment, by providing the limiting convex edge 34, the moving end position of the plastic pipe end is positioned to prevent the plastic pipe from being inserted too deeply.

[0058] As a preferred embodiment, the shape of the first bracket 1 is a U-shape formed by vertically connecting two vertical rods and a horizontal rod, the shape of the second bracket 2 is the same as that of the first bracket 1, and the horizontal rod parts of the first bracket 1 and the second bracket 2 are supported on the ground, which can provide stable support for the mechanism.

[0059] As a preferred embodiment, the driving mechanism 4 includes a driving shaft 41, a first bevel gear 42 and a second bevel gear 43;

[0060] The first bevel gear 42 is coaxially sleeved on the non-threaded section in the middle of the bidirectional screw rod, the two ends of the drive shaft 41 are rotatably connected between the electric fusion pipe body 3 and the second bracket 2, the second bevel gear 43 is coaxially connected to the drive shaft 41, and the second bevel gear 43 is meshed with the first bevel gear 42;

[0061] As a preferred embodiment, the axial direction of the driving shaft 41 is the X direction.

[0062] As a preferred embodiment, a rotating hand wheel 44 is connected to the end of the driving shaft 41 .

[0063] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for welding polyvinyl chloride electric hot-melt pipe fittings for water supply, characterized in that: Based on electrofusion fitting body and plastic pipe; The electrofusion pipe body comprises a first bracket, a second bracket, an electrofusion pipe body, a bidirectional screw rod, a first clamp mechanism, a guide shaft, a second clamp mechanism and a driving mechanism; The two ends of the bidirectional screw are rotatably connected to the first bracket and the second bracket respectively, and the axial direction of the bidirectional screw is the X direction; a non-threaded section is provided in the middle of the bidirectional screw; The main body of the electric fusion pipe is provided with a connecting through hole with an axial direction in the X direction, and a heating wire is arranged at a position near the X-direction end and the reverse end of the X direction on the inner wall of the connecting through hole; the outer wall of the electric fusion pipe is provided with a terminal electrically connected to the heating wire; The main body of the electrofusion pipe fitting is rotatably connected to the non-threaded section of the bidirectional screw rod via a bearing; The driving mechanism is transmission-connected with the bidirectional screw rod and is used to drive the bidirectional screw rod to rotate; The two ends of the guide shaft are fixedly connected to the first bracket and the second bracket respectively, and the axial direction of the guide shaft is the X direction; the main body of the electric fusion pipe is fixedly connected to the middle part of the guide shaft, and the axis of the guide shaft, the axis of the bidirectional screw rod and the axis of the connecting through hole of the capacitor pipe body are located in the same plane; The first hoop mechanism comprises a first arm and a second arm pivotally connected to each other, a threaded sleeve threadedly matched with a threaded section of a bidirectional screw rod is provided at the pivotal joint of the first arm and the second arm, the threaded sleeve is coaxially sleeved on the bidirectional screw rod, and an arc-shaped notch is provided at the holding portion of the first arm and the second arm to match the clearance of the outer diameter of the guide shaft, so that when the first arm and the second arm are held together, the arc-shaped notch forms a limiting hole coaxially sleeved on the outside of the guide shaft, so that the inner side thereof forms a holding hole which is interference-fitted with the outer wall of the plastic pipe; The second clamp mechanism and the first clamp mechanism are mirror images of each other; The welding method comprises the following steps: The control driving mechanism drives the bidirectional screw rod to rotate, so that the first clamp mechanism and the second clamp mechanism move synchronously in opposite directions, so that the first clamp mechanism is close to the first bracket, and the second clamp mechanism is close to the second bracket; The two plastic pipes are respectively connected to the holding holes of the first holding hoop mechanism and the holding holes of the second holding hoop mechanism by interference fit, and the first holding hoop mechanism and the second holding hoop mechanism are locked and fixed; The control driving mechanism drives the bidirectional screw rod to rotate in the opposite direction, so that the first clamp mechanism and the second clamp mechanism move synchronously in opposite directions, and the terminal is powered at the same time. After the two plastic pipes are inserted into the connecting through hole of the electric fusion pipe fitting body for a certain distance, the control driving mechanism stops, and the fusion is completed.

2. The method for welding polyvinyl chloride electric hot-melt pipe fittings for water supply according to claim 1, characterized in that: A ring-shaped limiting convex edge is provided at the middle part of the inner wall of the connecting through hole of the electrofusion pipe body; In the welding method, "until the two plastic pipes are inserted into the connecting through holes of the electric fusion pipe fitting body for a certain distance, the driving mechanism is controlled to stop" specifically means: until the ends of the two plastic pipes abut against the limiting convex edge, the driving mechanism is controlled to stop.

3. The method for welding polyvinyl chloride electric hot-melt pipe fittings for water supply according to claim 1, characterized in that: The first bracket is in a U shape formed by vertically connecting two vertical bars and a horizontal bar. The second bracket has the same shape as the first bracket. The horizontal bar parts of the first bracket and the second bracket are supported on the ground.

4. The method for welding polyvinyl chloride electric hot-melt pipe fittings for water supply according to claim 1, characterized in that: The driving mechanism comprises a driving shaft, a first bevel gear and a second bevel gear; The first bevel gear is coaxially sleeved on the non-threaded section in the middle of the bidirectional screw rod, the two ends of the drive shaft are rotatably connected between the electric fusion pipe body and the second bracket, the second bevel gear is coaxially connected to the drive shaft, and the second bevel gear is meshed with the first bevel gear.

5. The method for welding polyvinyl chloride electric hot-melt pipe fittings for water supply according to claim 4, characterized in that: The axial direction of the driving shaft is the X direction.

6. The method for welding polyvinyl chloride electric hot-melt pipe fittings for water supply according to claim 4, characterized in that: The end of the driving shaft is connected with a rotating hand wheel.

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