A method for processing a polyethylene bleed ball valve

Abstract

The application discloses a processing method of a polyethylene diffusion ball valve and relates to the technical field of valves.The polyethylene diffusion ball valve comprises a valve body, a hot-melt pipe, screw grooves and heating wires, and comprises the following steps: step one, fixing the hot-melt pipe; step two, installing the heating wires; step three, installing a tool bit; step four, slotting and wiring; step five, removing the hot-melt pipe; and step six, hot-melt connection.The heating wires are arranged, so that the polyethylene diffusion ball valve is convenient to use in a narrow space; the tool bit, the tool holder and the wire pressing mechanism are arranged, so that the screw grooves can be uniformly formed in the inner wall of the hot-melt pipe, the heating wires are tightly pressed in the screw grooves, the hot-melt pipe can be uniformly heated when the pipes are connected, and good sealing effect and adhesion are ensured; meanwhile, the tool bit is arranged to be detachable through improvement of the wire pressing mechanism, the tool bit can be suitable for processing pipes with different specifications and diameters, and the processing effect of the polyethylene diffusion ball valve with different specifications is ensured.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and in particular to a method for processing a polyethylene venting ball valve. Background Technology

[0002] A vent valve is a safety warning device for pipelines transporting flammable and explosive gases. When a temporary cause causes the pressure at the control point to exceed the set value (bubble bursting pressure), the valve releases a certain amount of gas. Vent valves have the technical advantages of sensitive action, fast response speed, and high discharge accuracy. Vent valves generally need to ensure good sealing with the pipeline during installation.

[0003] To ensure the sealing of the connection between the pipeline and the vent valve, a heat fusion method is generally used to connect the pipeline and the vent valve. This method requires that a resistance wire be pre-installed inside the vent valve during processing to heat and weld the pipeline. During processing, a spiral notch is usually opened inside the pipeline at the end of the vent valve, and the resistance wire is pressed into the spiral notch. The pressing method cannot be done simultaneously with opening the spiral notch and pressing in the resistance wire, which can cause entanglement and damage when installing the resistance wire.

[0004] For example, CN103398256B discloses a multi-functional wiring machine for electrofusion fittings, including a wiring cutter bar. The wiring cutter bar moves in a circular motion relative to the inner wall of the electrofusion fitting. The wiring cutter bar sequentially performs grooving, embedding heating wire, and closing the groove on the inner wall of the electrofusion fitting. This invention directly embeds heating wire in the inner wall of the formed electrofusion fitting, changing the traditional process of wiring first and then forming, greatly simplifying the traditional wiring process, improving production efficiency, and saving manufacturing costs.

[0005] The above-mentioned technical solution is difficult to press in resistance wires of different diameters in practical applications. When pressing in resistance wires of different diameters, it is necessary to adjust the diameter of the notch to facilitate the entry of the resistance wire. Furthermore, no external force is applied to push the resistance wire into the notch, making the operation cumbersome. Moreover, similar existing technologies lack guidance and protection for the resistance wire, making operation inconvenient.

[0006] Therefore, it is necessary to invent a processing method for a polyethylene venting ball valve to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a processing method for a polyethylene venting ball valve to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a processing method for a polyethylene venting ball valve, the venting ball valve comprising a valve body and a heat-fusion tube, wherein a threaded groove is formed inside the heat-fusion tube, and a heating wire is provided inside the threaded groove, comprising the following steps:

[0009] Step 1: Fix the hot melt tube. Install the hot melt tube in the fixture and position the opening of the hot melt tube close to the tool holder. Adjust the position of the tool holder so that the cutting head on the tool holder reaches the pre-processing position.

[0010] Step 2: Install the heating wire by threading it through the wire hole on the blade holder and extending it out from the outlet.

[0011] Step 3: Install the cutter head. Manually install the cutter head on the cutting edge position of the tool holder, and make the cutting part at the top of the cutter head perpendicular to the axis of rotation of the tool holder. Then use a wrench to press down on the top of the cutter head to tighten it.

[0012] Step 4: Grooving and wiring. Move the tool holder into the hot melt tube and make contact between the tool head and the inner wall of the hot melt tube. While rotating the tool holder, slide it towards the valve body. The tool head cuts the inner wall of the hot melt tube to create a groove. At the same time, the wire pressing mechanism on the tool holder presses the heating wire into the groove.

[0013] Step 5: Remove the hot melt tube, stop the tool holder from rotating, remove the tool holder from the hot melt tube, cut the heating wire, and remove the processed hot melt tube;

[0014] Step 6: Heat fusion connection. Insert the end of the heat fusion tube with the heating wire into the valve body. Connect both ends of the heating wire to the electrode post and energize it to heat up the heating wire and heat fusion tube, thus completing the heat fusion connection between the heat fusion tube and the valve body. Install the vent pipe to obtain the vent ball valve.

[0015] Preferably, a disassembly groove is provided on one side of the blade holder, the disassembly groove, the blade edge and the wire outlet are connected, the inner side of the blade edge is conical, the blade head and the blade holder are detachably connected, a positioning wheel is provided inside the blade holder, the outlet of the wire hole is located at the upper end of the positioning wheel, and the positioning wheel is used to guide the heating wire to slide inside the blade holder;

[0016] The tool holder has a socket in the middle, which is connected to the wire hole. The end of the wrench can be inserted into the socket for installing and removing the tool head.

[0017] The tool holder is equipped with a wire pressing mechanism inside, which is used to press the heating wire into the screw groove and prevents the disassembly wrench from being placed on one side of the tool holder.

[0018] Preferably, the pressing mechanism includes a guide and a pressing wheel, the pressing wheel being rotatably connected to the middle of the guide and used to push the heating wire toward the screw groove;

[0019] The pressing wheel is positioned below the cable outlet, the guide is slidably connected to the blade holder, a return spring is fixedly connected to one side of the guide, and the other end of the return spring is fixedly connected to the blade holder. The return spring causes the pressing wheel to fit against the heating wire.

[0020] The upper end of the guide is placed in the disassembly slot, and the guide can prevent the disassembly wrench from being left on the upper end of the tool holder.

[0021] Preferably, the cutter head includes a cutting part and a cutter body, the cutting part is located at the upper end of the cutter body and is fixedly connected to the cutter body, and the cutting part is used to open a threaded groove on the inner wall of the hot melt pipe;

[0022] The outer side of the blade is tapered, and the taper of the outer side of the blade is the same as the taper of the blade edge.

[0023] Preferably, the tool holder has a guide groove, and the two sides of the positioning wheel are placed in the guide groove, so that the positioning wheel can slide back and forth along the guide groove when it rotates;

[0024] The outer side of the positioning wheel is provided with an annular groove;

[0025] After the positioning wheel slides along the guide groove, the annular groove clamps the heating wire.

[0026] Preferably, a pressing pad is fixedly connected to the middle of the disassembly wrench, and the pressing pad is used to install the cutting head;

[0027] A plug rod is fixedly connected to one side of the disassembly wrench. The plug rod can be inserted into the plug hole, and the end of the plug rod can push the positioning wheel to move along the guide groove.

[0028] The end of the removal wrench is fixedly connected to a pull rod, which can be placed in the removal groove for removing the blade.

[0029] Preferably, a limiting rod is fixedly connected to one side of the guide member, the reset spring is sleeved on the outside of the limiting rod, the limiting rod passes through the end of the tool holder, and the limiting rod is slidably connected to the tool holder, so that the guide member can only slide along the direction of the limiting rod.

[0030] Preferably, a tension groove is provided at the bottom of the blade body, and the heating wire passes through the tension groove.

[0031] Preferably, the tool holder can rotate relative to the hot melt tube, and at the same time, the tool holder can slide relative to the axis of the hot melt tube.

[0032] The technical effects and advantages of this invention are as follows:

[0033] 1. This invention sets up a heat-fusion tube, a screw groove, and a heating wire. By connecting a power source to both ends of the heating wire, the heating wire is heated. During this process, the part of the heat-fusion tube with the screw groove softens due to heat, making it easier to connect the pipe. At the same time, it avoids the use of a heat-fusion machine, making it easier to use in confined spaces and improving its applicability.

[0034] 2. This invention, by setting up a knife holder, a wire outlet, and a knife head, drives the knife head to rotate, so that the knife head opens uniform screw grooves on the inner wall of the hot melt tube. At the same time, the wire outlet guides the heating wire into the screw grooves, so as to achieve the purpose of hot melting and heating the end of the pipe when installing the hot melt tube. This can ensure that the end of the pipe is heated evenly, prevent deviations during the connection process that cause poor sealing, and optimize the sealing performance after connection.

[0035] 3. This invention, by setting up a wire pressing mechanism, pushes the heating wire into the screw groove through the pressing wheel, preventing the heating wire from falling off or getting tangled. At the same time, during the disassembly of the cutter head, the guide is pushed by the return spring, and the upper end of the guide pushes the pull rod to the position, pushing the pull rod back into the disassembly groove, avoiding leaving the disassembly wrench on the tool holder and improving the safety during processing.

[0036] 4. This invention, by setting a tension groove, a cutter head, and a cutting edge, with both the cutter head and the cutting edge being conical, allows for an interference fit during use. Furthermore, the tension groove causes the cutter body to be pressed outwards on both sides corresponding to the groove, thereby increasing the friction between the cutter body and the cutting edge. It also provides space for the heating wire to penetrate, allowing the heating wire to approach the cutting part, guiding and protecting the heating wire, facilitating its installation, and enabling the use of smaller diameter heat-fusion pipes, thus expanding its applicability. Attached Figure Description

[0037] Figure 1 This is a flowchart illustrating the manufacturing process of the polyethylene venting ball valve in this invention.

[0038] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0039] Figure 3 This is a schematic diagram of the structure of the hot melt tube in this invention.

[0040] Figure 4 This is a schematic diagram of the disassembled state of the cutter head in this invention.

[0041] Figure 5 This is a schematic diagram showing the disassembled cutter head state in this invention.

[0042] Figure 6 This is a schematic diagram of the blade installation state in this invention.

[0043] Figure 7 This is a cross-sectional view of the hot melt tube in this invention.

[0044] Figure 8 In this invention Figure 7 A magnified view of a portion of region A.

[0045] Figure 9 This is a schematic diagram showing the state of the cutting head cutting the inner wall of the hot melt tube in this invention.

[0046] In the diagram: 1. Valve body; 2. Hot melt tube; 3. Threaded groove; 4. Heating wire; 5. Tool holder; 6. Wire hole; 7. Wire outlet; 8. Tool head; 9. Tool edge; 10. Disassembly wrench; 11. Disassembly groove; 12. Positioning wheel; 13. Insertion hole; 14. Wire pressing mechanism; 15. Guide slide groove; 16. Annular wire groove; 17. Pressing pad; 18. Insert rod; 19. Pull rod; 141. Guide component; 142. Pressing wheel; 143. Return spring; 144. Limiting rod; 81. Cutting part; 82. Tool body; 83. Tensioning groove. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] Example 1, the present invention provides as follows Figures 1 to 9 The method for processing a polyethylene venting ball valve shown includes a valve body 1 for controlling the flow of liquid or gas, and a heat-fusion pipe 2 fixedly connected to both sides of the valve body 1. The heat-fusion pipe 2 communicates with and is fixedly connected to the valve body 1.

[0049] The screw groove 3 is formed on the inner wall of the hot melt tube 2. The screw groove 3 extends from the end of the hot melt tube 2 toward the valve body 1. The starting position of the screw groove 3 is a certain distance away from the end of the hot melt tube 2 to prevent the end of the hot melt tube 2 from deforming during the hot melt process, which would cause the connection to fail or affect the connection effect.

[0050] Heating wire 4 is placed inside the screw groove 3, with both ends extending from the ends of the screw groove 3 and retaining an appropriate length for easy connection to a power source. Connecting the two ends of heating wire 4 to a power source raises its temperature, melting the inner wall of the heat-fusion tube 2. After the inner wall of the heat-fusion tube 2 is melted, the connected pipe can be inserted into the heat-fusion tube 2. Once inserted, the power connection to heating wire 4 is disconnected, allowing the inner wall of the heat-fusion tube 2 to cool down. After the inner wall of the heat-fusion tube 2 cools and solidifies, the inserted pipe connects to the heat-fusion tube 2, creating a good seal. Heating wire 4 can also be a resistance wire or heating wire, or other wire that generates heat when energized.

[0051] It should be noted that the cross-section of the screw groove 3 is circular, and the end near the axis of the hot melt tube 2 has a rectangular opening. When the heating wire 4 is pressed into the screw groove 3, the rectangular part clamps the side wall of the heating wire 4 to prevent the heating wire 4 from falling off.

[0052] Specifically, it includes the following steps:

[0053] Step 1: Fix the hot melt tube 2. Install the hot melt tube 2 in the fixture and position the opening of the hot melt tube 2 close to the side of the tool holder 5. Adjust the position of the tool holder 5 so that the tool head 8 on the tool holder 5 reaches the pre-processing position.

[0054] Step 2: Install heating wire 4. Pass heating wire 4 through the wire hole 6 on the tool holder 5 and extend it out from the outlet 7. Then pull it out to an appropriate length to facilitate later power connection. Fix the pulled-out heating wire 4 to the outer wall of the hot melt tube 2 to prevent it from coming into contact with the operator during the rotation of the tool holder 5 in subsequent steps.

[0055] Step 3: Install the cutter head 8. Manually install the cutter head 8 at the cutting edge 9 position on the tool holder 5, and make the cutting part 81 at the top of the cutter head 8 perpendicular to the axis of rotation of the tool holder 5, so that after the tool holder 5 enters the hot melt tube 2, the cutting part 81 can contact the inner wall of the hot melt tube 2. Then use the disassembly wrench 10 to press the top of the cutter head 8 to tighten the cutter head 8, so that the cutter head 8 and the cutting edge 9 are interference fit, to prevent the cutter head 8 from falling off during use.

[0056] Step 4: Grooving and wiring. Move the tool holder 5 into the hot melt tube 2 and bring the cutter head 8 into contact with the inner wall of the hot melt tube 2. Rotate the tool holder 5 so that the cutting part 81 moves along the inner wall of the hot melt tube 2, making the cutter head 8 and the cutting edge 9 fit more tightly and preventing the cutter head 8 from disengaging. The end of the cutter head 8 is inserted into the inner wall of the hot melt tube 2 to a certain depth and cuts the inner wall to create a groove 3. At the same time, it slides towards the valve body 1. The cutter head 8 cuts the inner wall of the hot melt tube 2 to create a groove 3. At the same time, the wire pressing mechanism 14 presses the heating wire 4 into the groove 3. The side wall of the groove 3 clamps the heating wire 4 to prevent the heating wire 4 from falling off. The tool holder 5 slides while rotating, so that the heating wire 4 is evenly placed on the inner wall of the hot melt tube 2. The distribution density is proportional to the sliding speed of the tool holder 5. The faster the tool holder 5 slides towards the side closer to the valve body 1, the fewer heating wires 4 are pressed into the hot melt tube 2, and vice versa.

[0057] Step 5: Remove the hot melt tube 2, stop the tool holder 5 from rotating, remove the tool holder 5 from the hot melt tube 2, leave an appropriate length of heating wire 4 for later power connection, cut the heating wire 4, remove the processed hot melt tube 2, and then install a new hot melt tube 2.

[0058] Step 6: Heat fusion connection. Insert one end of the heat fusion tube 2 with the heating wire 4 into the valve body 1. Connect both ends of the heating wire 4 to the electrode post and energize it to heat up the heating wire 4 and heat fusion tube 4, thus completing the heat fusion connection between the heat fusion tube 2 and the valve body 1. Install the venting pipe to obtain the venting ball valve.

[0059] It should be noted that by changing the specifications of the cutting part 81, the tool holder 5 can also rotate along the outer wall of the hot melt tube 2 to cut, so as to open the screw groove 3 and lay the heating wire 4 on the outer wall of the hot melt tube 2 to meet different usage requirements.

[0060] Furthermore, the tool holder 5 can rotate relative to the hot melt tube 2, and at the same time, the tool holder 5 can slide relative to the axis of the hot melt tube 2.

[0061] Specifically, a disassembly groove 11 is provided on one side of the tool holder 5. The disassembly groove 11 is located below the cutting edge 9. The disassembly groove 11, the cutting edge 9, and the wire outlet 7 are connected. The lower end of the cutting head 8 is placed in the disassembly groove 11. The heating wire 4 extends through the wire outlet 7. The inner side of the cutting edge 9 is tapered, and the upper diameter of the cutting edge 9 is larger than the lower diameter. The cutting head 8 is detachably connected to the tool holder 5 to achieve the purpose of replacing different specifications of cutting heads 8 when installing heating wires of different specifications 4. Cutting heads 8 of different specifications can all be placed in the cutting edge 9 and are interference-fitted with it. By changing different specifications of cutting tools, different specifications of hot melt tubes can be processed to meet various processing needs.

[0062] Specifically, the tool holder 5 is equipped with a positioning wheel 12 inside. The positioning wheel 12 can rotate relative to the tool holder 5 and slide inside the tool holder 5. The outlet of the wire hole 6 is located at the upper end of the positioning wheel 12. The positioning wheel 12 is used to guide the heating wire 4 to slide inside the tool holder 5. The positioning wheel 12 supports the heating wire 4 to slide inside the tool holder 5 and prevents the inner wall of the tool holder 5 from scratching the heating wire 4.

[0063] More specifically, the tool holder 5 has a socket 13 in the middle, which communicates with the wire hole 6. The heating wire 4 can pass through the socket 13 and enter the outlet 7 after passing through the socket 13. The end of the removal wrench 10 can be inserted into the socket 13, which facilitates the installation and removal of the tool head 8. The socket 13 provides a fulcrum for the removal wrench 10 when it is used. As described above, the socket 13 serves two purposes: firstly, it guides the heating wire 4, and secondly, it facilitates the insertion of the wrench 10 into the socket 13, enabling the removal and installation of tool heads 8 of different specifications using the removal wrench 10.

[0064] Furthermore, the tool holder 5 is equipped with a wire pressing mechanism 14, which is used to press the heating wire 4 into the screw groove 3 to prevent the heating wire 4 from failing to enter the screw groove 3 accurately, causing the heating wire 4 to fall off or become tangled, and to prevent the disassembly wrench 10 from being placed on one side of the tool holder 5, so as to avoid the disassembly wrench 10 being left on the outside of the tool holder 5 after use.

[0065] Specifically, the wire pressing mechanism 14 includes a guide 141 and a pressing wheel 142. The pressing wheel 142 is rotatably connected to the middle of the guide 141. The pressing wheel 142 is used to push the heating wire 4 to move into the screw groove 3. The pressing wheel 142 is placed below the wire outlet 7. The pressing wheel 142 is used to push the heating wire 4 to slide into the screw groove 3 to prevent the heating wire 4 from falling off or getting tangled. The guide 141 is slidably connected to the tool holder 5. A return spring 143 is fixedly connected to one side of the guide 141. The other end of the return spring 143 is fixedly connected to the tool holder 5. The return spring 143 makes the pressing wheel 142 fit against the heating wire 4. The guide 141 is pushed by the return spring 143 to make the pressing wheel 142 squeeze the heating wire 4, thereby making the heating wire 4 accurately enter into the screw groove 3.

[0066] Meanwhile, the guide 141 can prevent the disassembly wrench 10 from being left on the upper end of the tool holder 5.

[0067] Furthermore, a limiting rod 144 is fixedly connected to one side of the guide member 141. The limiting rod 144 is used to limit the sliding direction of the guide member 141. The reset spring 143 is sleeved on the outside of the limiting rod 144. The limiting rod 144 passes through the end of the tool holder 5 and is slidably connected to the tool holder 5. The setting of the limiting rod 144 can prevent the guide member 141 from getting stuck due to tilting during the sliding process.

[0068] The upper end of the guide member 141 is placed in the disassembly groove 11. The upper end of the guide member 141 is inclined. When the end of the disassembly wrench 10 is placed in the disassembly groove 11, the disassembly wrench 10 pushes the guide member 141 and the pressing wheel 142 to slide. At the same time, the return spring 143 is compressed and contracted. After the disassembly wrench 10 is released, the return spring 143 pushes the pusher to the initial position. At this time, the pusher pushes the disassembly wrench 10 down to prevent the disassembly wrench 10 from being left on the tool holder 5. As described above, by setting the guide member 141, the pressing wheel 142, and the return spring 143, on the one hand, the heating wire 4 can be pressed and guided to ensure the stable delivery of the heating wire 4 and its entry into the screw groove 3; on the other hand, it can cooperate with the disassembly wrench 10 to install and remove the tool head 8, which facilitates the installation and removal of the disassembly wrench 10.

[0069] More specifically, the cutter head 8 includes a cutting part 81 and a cutter body 82. The cutting part 81 is placed at the upper end of the cutter body 82 and is fixedly connected to the cutter body 82. One end of the cutting part 81 protrudes in a conical shape, which can cut the inner wall of the hot melt tube 2. During use, the inner wall of the hot melt tube 2 contacts the cutting part 81. The cutting part 81 cuts a threaded groove 3 on the inner wall of the hot melt tube 2 to facilitate the placement of the heating wire 4.

[0070] The outer side of the cutter body 82 is tapered, and the taper of the outer side of the cutter body 82 is the same as the taper of the cutting edge 9. When the cutter body 82 is installed in the cutting edge 9, the cutter body 82 and the cutting edge 9 are interference fit. During use, the pressure generated by the cutting of the cutter body 82 will also make the fit between the cutter body 82 and the cutting edge 9 even tighter.

[0071] It should be noted that different cutting heads 8 can be installed on the cutting part 81 to meet different usage requirements. This allows for different cross-sections of the threaded groove 3 opened on the inner wall of the hot melt tube 2, which can be used to accommodate heating wires 4 of different diameters, or optimize the fixing method of the heating wire 4 in the threaded groove 3.

[0072] Specifically, the tool holder 5 has a guide groove 15, and the two sides of the positioning wheel 12 are placed in the guide groove 15. The two sides of the positioning wheel 12 are cylindrical protrusions, so that the positioning wheel 12 can slide back and forth along the guide groove 15 when rotating. During use, when the heating wire 4 is placed at the upper end of the positioning wheel 12, the heating wire 4 moves and drives the positioning wheel 12 to rotate. At the same time, the positioning wheel 12 is placed at the lower end position under the pressure of the heating wire 4. The positioning wheel 12 supports the heating wire 4 and prevents the heating wire 4 from bending and being damaged.

[0073] More specifically, an annular groove 16 is provided on the outer side of the positioning wheel 12. During use, the heating wire 4 is placed in the annular groove 16 to prevent the heating wire 4 from slipping off the upper end of the positioning wheel 12 and affecting the supporting effect of the positioning wheel 12 on the heating wire 4.

[0074] At the same time, after the positioning wheel 12 slides along the guide groove 15, the annular groove 16 clamps the heating wire 4 and keeps the heating wire 4 stationary.

[0075] Specifically, a pressing pad 17 is fixedly connected to the middle of the removal wrench 10. The pressing pad 17 is made of rubber to prevent the end of the cutting head 8 from being scratched when pressing it. The pressing pad 17 is used to install the cutting head 8.

[0076] More specifically, a plug rod 18 is fixedly connected to one side of the disassembly wrench 10. The plug rod 18 can be inserted into the plug hole 13. The end of the plug rod 18 is tapered and sharp. The end of the plug rod 18 can push the positioning wheel 12 to move along the guide groove 15. When the positioning wheel 12 slides along the guide groove 15 to the upper position, the positioning wheel 12 clamps the heating wire 4 to prevent the heating wire 4 from moving and to prevent the heating wire 4 from retracting along the wire hole 6 when the disassembly wrench 10 is used.

[0077] Furthermore, a pull rod 19 is fixedly connected to the end of the disassembly wrench 10. The pull rod 19 can be placed in the disassembly groove 11 for disassembling the cutter head 8. The end of the pull rod 19 is disc-shaped and can be inserted into the lower end of the cutter body 82. When the pull rod 19 is placed in the disassembly groove 11, it pushes the guide member 141 to slide, causing the return spring 143 to contract. When the disassembly wrench 10 is released, the return spring 143 causes the guide member 141 and the pressing wheel 142 to reset. At this time, the pull rod 19 is pushed out of the disassembly groove 11, and the disassembly wrench 10 is dislodged from the cutter holder 5 to prevent the disassembly wrench 10 from being left on the upper end of the cutter holder 5.

[0078] It should be noted that the end of the disassembly wrench 10 is rounded, which can better support the palm during use and prevent the palm from sliding and causing inconvenience.

[0079] When disassembling the cutter head 8, insert the insert rod 18 of the disassembly wrench 10 into the insertion hole 13. At the same time, the insert rod 18 pushes the positioning wheel 12 to slide along the guide groove 15 to clamp the heating wire 4 and prevent the heating wire 4 from moving. Then, insert the pull rod 19 into the disassembly groove 11. After that, the cutter head 8 can be removed by gently lifting the wire.

[0080] When installing the cutter head 8, manually place the cutter head 8 into the position of the cutting edge 9 and adjust the direction of the cutting part 81. Then, reverse the position of the installation and removal wrench 10 and insert the insertion rod 18 into the insertion hole 13. Align the pressing pad 17 with the cutter head 8, and then flip the installation and removal wrench 10 downwards. The pressing pad 17 will then tightly install the cutter head 8 into the cutting edge 9.

[0081] In this embodiment, the screw groove 3 is used to install the heating wire 4 at a specific position. During use, the cutter head 8 is installed at the cutting edge 9 of the cutter holder 5, and the direction of the cutting part 81 at the upper end of the cutter head 8 is adjusted. To achieve a tight installation, after placing the cutter head 8, the removal wrench 10 is used to further press the cutter head 8, insert the insertion rod 18 into the insertion hole 13, align the pressing pad 17 with the cutter head 8, and then flip the removal wrench 10 downwards. The pressing pad 17 is used to tightly install the cutter head 8 in the cutting edge 9. Then, the heating wire 4 is inserted into the insertion hole 13 through the wire hole 6. At this time, the heating wire 4 contacts the outer side of the positioning wheel 12. Then, the heating wire 4 is passed through the wire outlet 7 and extends to an appropriate length.

[0082] At this point, processing can begin. The tool holder 5 rotates, causing the tool head 8 to cut a threaded groove 3 into the inner wall of the hot melt tube 2. Simultaneously, the guide member 141 is pushed by the return spring 143, causing the pressing roller 142 to squeeze the heating wire 4, thereby accurately inserting the heating wire 4 into the threaded groove 3 and retaining the heating wire 4 in the threaded groove 3.

[0083] When replacing the cutter head 8, insert the insertion rod 18 of the removal wrench 10 into the insertion hole 13. At the same time, the insertion rod 18 pushes the positioning wheel 12 to slide along the guide groove 15, and inserts the pull rod 19 into the disassembly groove 11. Then, gently lift the line to remove the cutter head 8. After releasing the removal wrench 10, the guide member 141 is pushed by the return spring 143. The upper end of the guide member 141 pushes the pull rod 19 to the position, pushing the pull rod 19 back into the disassembly groove 11, thus preventing the removal wrench 10 from being left on the cutter holder 5.

[0084] In Example 2, according to the above embodiment, during actual processing, the cutter head 8 and the cutting edge 9 of the tool holder 5 are closely fitted and limited by an interference fit. However, due to the vibration generated during equipment operation, the effect of the interference fit is reduced. At the same time, due to usage requirements, the installation position of the heating wire 4 is generally close to the cutting position of the cutter head 8. This method can just reduce the size of the tool holder 5, thereby enabling the processing of smaller diameter hot melt tubes 2. However, the longitudinal dimension of the cutter head 8 should not be too small. If the longitudinal dimension is too small, the friction area between the cutter head 8 and the cutting edge 9 will be reduced, thus affecting the stability of the cutter head 8. However, if the longitudinal dimension is too large, it will lead to an increase in the size of the tool holder 5, reducing the applicable range. Therefore, further optimization of the cutter head 8 is needed to solve the above-mentioned shortcomings.

[0085] Specifically, a tension groove 83 is provided at the bottom of the blade body 82. The tension groove 83 gives the bottom of the blade body 82 a certain degree of toughness. When the blade body 82 is installed at the blade edge 9, the tight installation causes the tension groove 83 at the bottom of the blade body 82 to deform. At the same time, due to the toughness of the material of the blade body 82, the two sides of the blade body 82 corresponding to the tension groove 83 will be squeezed outward, thereby increasing the friction between the blade body 82 and the blade edge 9. Meanwhile, the heating wire 4 passes through the tension groove 83, which increases the longitudinal dimension of the blade body 82, further improving the friction between the blade body 82 and the blade edge 9. It also provides room for the heating wire 4 to move, reducing the size of the blade holder 5 and making it more widely applicable.

[0086] In this embodiment, the tensioning groove 83 increases the friction between the cutter body 82 and the cutter holder 5, and also facilitates the passage of the heating wire 4, bringing the heating wire 4 closer to the cutting part 81. This allows the heating wire 4 to be pushed in quickly, better securing it, while also reducing the size of the cutter holder 5 and increasing its applicability.

[0087] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for processing a polyethylene venting ball valve, the venting ball valve comprising a valve body and a heat-fusion tube, wherein a threaded groove is formed inside the heat-fusion tube, and a heating wire is disposed within the threaded groove, characterized in that, Includes the following steps: Step 1: Fix the hot melt tube. Install the hot melt tube in the fixture and position the opening of the hot melt tube close to the tool holder. Adjust the position of the tool holder so that the cutting head on the tool holder reaches the pre-processing position. Step 2: Install the heating wire by threading it through the wire hole on the blade holder and extending it out from the outlet. Step 3: Install the cutter head. Install the cutter head on the cutting edge position of the tool holder, and make the cutting part at the top of the cutter head perpendicular to the axis of rotation of the tool holder. Then use a wrench to press down the top of the cutter head to tighten it. Step 4: Grooving and wiring. Move the tool holder into the hot melt tube and make contact between the tool head and the inner wall of the hot melt tube. While rotating the tool holder, slide it towards the valve body. The tool head cuts the inner wall of the hot melt tube to create a groove. At the same time, the wire pressing mechanism on the tool holder presses the heating wire into the groove. Step 5: Remove the hot melt tube, stop the tool holder from rotating, remove the tool holder from the hot melt tube, cut the heating wire, and remove the processed hot melt tube; Step 6: Heat fusion connection. Insert one end of the heat fusion tube with the heating wire into the valve body. Connect both ends of the heating wire to the electrode post and energize it to heat up the heating wire and heat fusion tube, thus completing the heat fusion connection between the heat fusion tube and the valve body. Install the vent pipe to obtain the vent ball valve. The blade holder has a disassembly groove on one side, which is connected to the blade and the wire outlet. The inner side of the blade is conical, and the blade head is detachably connected to the blade holder. The blade holder has a positioning wheel inside, and the outlet of the wire hole is located at the upper end of the positioning wheel. The positioning wheel is used to guide the heating wire to slide inside the blade holder. The tool holder has a socket in the middle, which is connected to the wire hole. The end of the wrench can be inserted into the socket for installing and removing the tool head. The tool holder is equipped with a wire pressing mechanism inside, which is used to press the heating wire into the screw groove and prevents the disassembly wrench from being placed on one side of the tool holder. The wire pressing mechanism includes a guide and a pressing wheel. The pressing wheel is rotatably connected to the middle of the guide and is used to push the heating wire toward the screw groove. The pressing wheel is positioned below the cable outlet, the guide is slidably connected to the blade holder, a return spring is fixedly connected to one side of the guide, and the other end of the return spring is fixedly connected to the blade holder. The return spring causes the pressing wheel to fit against the heating wire. The upper end of the guide is placed in the disassembly groove, and the guide can prevent the disassembly wrench from being left on the upper end of the tool holder; The tool holder has a guide groove, and the two sides of the positioning wheel are placed in the guide groove, so that the positioning wheel can slide back and forth along the guide groove when it rotates. The outer side of the positioning wheel is provided with an annular groove; After the positioning wheel slides along the guide groove, the annular groove clamps the heating wire. A pressing pad is fixedly connected to the middle of the disassembly and assembly wrench, and the pressing pad is used to install the cutting head; A plug rod is fixedly connected to one side of the disassembly wrench. The plug rod can be inserted into the plug hole, and the end of the plug rod can push the positioning wheel to move along the guide groove. The end of the disassembly wrench is fixedly connected to a pull rod, which can be placed in the disassembly groove for disassembling the blade.

2. The processing method of a polyethylene venting ball valve according to claim 1, characterized in that: The cutter head includes a cutting part and a cutter body. The cutting part is located at the upper end of the cutter body and is fixedly connected to the cutter body. The cutting part is used to open a threaded groove on the inner wall of the hot melt pipe. The outer side of the blade is tapered, and the taper of the outer side of the blade is the same as the taper of the blade edge.

3. The processing method of a polyethylene venting ball valve according to claim 1, characterized in that: A limiting rod is fixedly connected to one side of the guide member, and the reset spring is sleeved on the outside of the limiting rod. The limiting rod passes through the end of the tool holder and is slidably connected to the tool holder, so that the guide member can only slide along the direction of the limiting rod.

4. The processing method of a polyethylene venting ball valve according to claim 2, characterized in that: A tensioning groove is provided at the bottom of the blade body, and the heating wire passes through the tensioning groove.

5. The processing method of a polyethylene venting ball valve according to claim 1, characterized in that: The tool holder can rotate relative to the hot melt tube, and at the same time, the tool holder can slide relative to the axis of the hot melt tube.

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