Welding method of polyvinyl chloride electric hot-melt pipe fittings for water supply

Abstract

The present invention relates to the technical field of electric fusion pipe fittings, and in particular to a method for welding polyvinyl chloride electric hot-melt pipe fittings for water supply; when the electric fusion pipe fitting body and the plastic pipe are butt-jointed, the plastic pipes to be welded at both ends are respectively clamped and positioned by a first clamping mechanism and a second clamping mechanism, and the first clamping mechanism and the second clamping mechanism are synchronously moved toward each other by driving a bidirectional screw rod to rotate. During the movement, the terminal is energized, and the plastic pipe and the electric fusion pipe fitting body are heat-fused while moving, so that the two are welded under a moving friction state. Compared with the original method of manually hammering the plastic pipe to make it interference fit with the electric fusion pipe fitting body before electric fusion, the plastic pipe can be efficiently and accurately butted against the electric fusion pipe fitting, and the sealing of the connection can be guaranteed.

Description

Technical Field

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

[0002] Common methods for plastic pipe welding are oil hot melting and electric melting. Electric melting requires the use of electric melting pipe fittings, such as polyvinyl chloride electric melting pipe fittings. The 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 to remove 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 model of 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 or other method to make the electric melting pipe fitting and the plastic pipe 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 fitting 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 includes 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; the middle part of the bidirectional screw is provided with a non-threaded section;

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

[0010] The electrofusion pipe body 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 and the axis of the connecting through hole of the capacitor pipe body are located in the same plane;

[0013] The first clamp mechanism includes a first clamping arm and a second clamping arm pivotally connected to each other. The pivotal connection between the first clamping arm and the second clamping arm is provided with a threaded sleeve that is threadedly engaged with the threaded section of the bidirectional screw. The threaded sleeve is coaxially sleeved on the bidirectional screw. The connecting portion of the first clamping arm and the second clamping arm is provided with an arc-shaped notch that is clearance-matched with the outer diameter of the guide shaft. When the first clamping arm and the second clamping arm are mutually engaged, the arc-shaped notch forms a limiting hole coaxially sleeved on the outside of the guide shaft, so that the inner side of the notch forms an clamping hole that is interference-fitted with the outer wall of the plastic tube.

[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 driving mechanism is controlled to drive the bidirectional screw to rotate, so that the first clamping mechanism and the second clamping mechanism move synchronously in opposite directions, so that the first clamping mechanism is close to the first bracket and the second clamping mechanism is close to the second bracket;

[0017] Interference-connect the two plastic tubes to the holding holes of the first holding hoop mechanism and the second holding hoop mechanism, respectively, and lock and secure the first holding hoop mechanism and the second holding hoop mechanism;

[0018] The control drive mechanism drives the bidirectional screw rod to rotate in opposite directions, so that the first clamp mechanism and the second clamp mechanism move synchronously in opposite directions. At the same time, the terminal is powered until the two plastic pipes are inserted into the connecting through holes of the electric fusion pipe fitting body for a certain distance. The control drive 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, an annular 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, "controlling the driving mechanism to stop until the two plastic pipes are inserted a certain distance into the connecting through holes of the electric fusion pipe fitting body" specifically means: controlling the driving mechanism to stop until the ends of the two plastic pipes abut against the limiting convex edge.

[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] Furthermore, 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, and the two ends of the drive shaft are rotatably connected between the electric fusion pipe body and the second bracket respectively. The second bevel gear is coaxially connected to the drive shaft and meshes 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, the end of the driving shaft is connected to a rotating hand wheel.

[0026] The beneficial effects of the present invention are 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 by driving the bidirectional screw rod to rotate, the first clamp mechanism and the second clamp mechanism are synchronously moved toward each other, and the terminal is energized during the movement, so that the plastic pipe and the electric fusion pipe fitting body move while being hot-melted, so that the two are welded under the state of moving friction. Compared with the original method of manually hammering the plastic pipe to make it 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 This is a schematic structural 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 This is a schematic structural 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. Second bracket;

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

[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 clamping mechanism; 61. First clamping arm; 62. Second clamping arm; 63. Arc-shaped notch;

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

[0039] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0040] Please refer to Figures 1 to 4 , a 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-melt pipe fitting body and the plastic pipe;

[0041] The electrofusion pipe body includes 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. 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 axially extending in the X direction. A heating wire 32 is arranged on the inner wall of the connecting through hole 31 near the X-direction end and the opposite end of the X direction. The outer wall of the electrofusion pipe is provided with a terminal 33 electrically connected to the heating wire 32.

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

[0045] The driving mechanism 4 is in transmission connection with the bidirectional screw rod and is used to drive 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 part 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 includes a first clamping arm 61 and a second clamping arm 62 pivotally connected to each other. The pivotal connection of the first clamping arm 61 and the second clamping arm 62 is provided with a threaded sleeve that is threadedly engaged with the threaded section of the bidirectional screw. The threaded sleeve is coaxially sleeved on the bidirectional screw. The clamping portion of the first clamping arm 61 and the second clamping arm 62 is provided with an arc-shaped notch 63 that is clearance-matched with the outer diameter of the guide shaft 5. When the first clamping arm 61 and the second clamping arm 62 are mutually engaged, the arc-shaped notch 63 forms a limiting hole coaxially sleeved on the outside of the guide shaft 5, so that the inner side thereof forms a clamping hole that is interference-fitted with the outer wall of the plastic tube.

[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 to rotate, so that the first clamping mechanism 6 and the second clamping mechanism 7 move synchronously in opposite directions, so that the first clamping mechanism 6 is close to the first bracket 1, and the second clamping mechanism 7 is close to the second bracket 2;

[0051] Interference-connect the two plastic tubes to the holding holes of the first holding hoop mechanism 6 and the holding holes of the second holding hoop mechanism 7, respectively, and lock and secure the first holding hoop mechanism and the second holding hoop mechanism 7;

[0052] The control drive 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. At the same time, the terminal 33 is energized until the two plastic pipes are inserted into the connecting through hole 31 of the electric fusion pipe fitting body 3 by a certain distance. Then the control drive mechanism 4 stops, and the welding 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 docked, the first clamp mechanism 6 and the second clamp mechanism 7 are used to clamp and position the plastic pipes at both ends that need to be welded, respectively. By driving the bidirectional screw rod to rotate, the first clamp mechanism 6 and the second clamp mechanism 7 are synchronously moved toward each other. During the movement, the terminal 33 is energized, and the plastic pipe and the electric fusion pipe fitting body are moved while being hot-melted, so that the two are welded under the state of moving friction. Compared with the original method of manually hammering the plastic pipe to make it interference fit with the electric fusion pipe fitting body before electric fusion, the plastic pipe can be docked with the electric fusion pipe fitting efficiently and accurately, and the sealing of the connection can be guaranteed.

[0055] As a preferred embodiment, a ring-shaped limiting ridge 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 tubes are inserted into the connecting through holes 31 of the electrofusion pipe fitting body 3 by a certain distance, the driving mechanism 4 is controlled to stop” specifically means: until the ends of the two plastic tubes abut against the limiting protrusion 34 , the driving mechanism 4 is controlled to stop.

[0057] In the above embodiment, the limiting ridge 34 is provided to locate the end point of the movement of the plastic pipe end, thereby preventing 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, and the shape of the second bracket 2 is the same as that of the first bracket 1. 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. 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 meshes with the first bevel gear 42.

[0061] As a preferred embodiment, the axial direction of the drive 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 description 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 includes 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; the middle part of the bidirectional screw is provided with a non-threaded section; The main body of the electrofusion pipe is provided with a connecting through hole with an axial direction in the X direction, and a heating wire is arranged on the inner wall of the connecting through hole near the X-direction end and the X-direction opposite end; the outer wall of the electrofusion pipe is provided with a terminal electrically connected to the heating wire; The electrofusion pipe body is rotatably connected to the non-threaded section of the bidirectional screw rod via a bearing; The driving mechanism is in transmission connection 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 and the axis of the connecting through hole of the capacitor pipe body are located in the same plane; The first clamp mechanism includes a first clamping arm and a second clamping arm pivotally connected to each other. The pivotal connection between the first clamping arm and the second clamping arm is provided with a threaded sleeve that is threadedly engaged with the threaded section of the bidirectional screw. The threaded sleeve is coaxially sleeved on the bidirectional screw. The connecting portion of the first clamping arm and the second clamping arm is provided with an arc-shaped notch that is clearance-matched with the outer diameter of the guide shaft. When the first clamping arm and the second clamping arm are mutually engaged, the arc-shaped notch forms a limiting hole coaxially sleeved on the outside of the guide shaft, so that the inner side of the notch forms an clamping hole that is interference-fitted with the outer wall of the plastic tube. The second clamp mechanism and the first clamp mechanism are mirror images of each other; The welding method comprises the following steps: The driving mechanism is controlled to drive the bidirectional screw to rotate, so that the first clamping mechanism and the second clamping mechanism move synchronously in opposite directions, so that the first clamping mechanism is close to the first bracket and the second clamping mechanism is close to the second bracket; Interference-connect the two plastic tubes to the holding holes of the first holding hoop mechanism and the second holding hoop mechanism, respectively, and lock and secure the first holding hoop mechanism and the second holding hoop mechanism; The control drive mechanism drives the bidirectional screw rod to rotate in opposite directions, so that the first clamp mechanism and the second clamp mechanism move synchronously in opposite directions. At the same time, the terminal is powered, and the plastic tube and the electric fusion pipe fitting body move while being hot-melted, so that the two are welded under the state of moving friction. After the two plastic tubes are inserted into the connecting through hole of the electric fusion pipe fitting body for a certain distance, the control drive mechanism stops, and the welding is completed.

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

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 rods and a horizontal rod. The second bracket has the same shape as the first bracket. The horizontal rod 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 includes 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, and 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 engaged 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 drive 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.

Images