An electric fusion pipe wiring tool with stress response function

Abstract

The present invention provides a stress-responsive electrofusion pipe routing tool, comprising a slotter, a cutter, a jointer, and a pressing portion. The jointer is connected to a rotating bearing, has a pressing portion at its top, and has mounting holes on its sides. The jointer has a hollow interior, within which the slotter is mounted. The present invention is both integrated and multifunctional. During use, it can simultaneously perform slotting, routing, pressing, stabilizing, and multiple pressing operations, eliminating assembly difficulties for the combined tool, improving tool stability and service life, and thus significantly enhancing the quality of the final product.

Description

Technical Field

[0001] The invention relates to the field of electrofusion pipe fitting processing, in particular to an electrofusion pipe fitting wiring tool. Background Art

[0002] Electric fusion fittings minimize the impact of environmental and human factors during construction, resulting in improved reliability. Therefore, they play an important and alternative role in engineering and maintenance. As pipe connection accessories, electric fusion fittings require a resistance wire embedded in the pipe joint. This heating of the resistance wire melts the surface polymer, effectively connecting the fitting to the pipe.

[0003] Typically, to improve the bonding effect between the two, the method of increasing the wiring density (i.e., reducing the spacing between the wire troughs) is often adopted. However, for the middle part of the pipe fitting, which contributes less to the bonding effect, if the same dense wiring method is adopted, it will undoubtedly cause a large amount of resistance wire waste and extend the production cycle. In addition, for certain special structures of electric fusion pipe fittings, such as saddle-type pipe fittings, existing technology still cannot realize the wiring operation. The reason is that when the wire trough trajectory needs to make a large angle turn (greater than 180 degrees) during the wiring process, the blade itself has a certain width. Due to the change in the curvature of the wire trough, it will cause a large stress on the tool itself. If the stress on the tool cannot be offset, the tool will become stuck or even break.

[0004] In the prior art, patents CN2016102226.5 and CN207272204U both disclose a design for a wiring tool, which uses a combination tool to cut a groove on the inner wall of a pipe fitting, and uses a roller to embed a resistance wire into the groove to achieve wiring, completing the grooving and wiring simultaneously. However, the above-mentioned combination tool components are numerous, the assembly method is relatively complex, and it is not easy to disassemble; the tool cannot rotate at a large angle, and cannot achieve wiring of special-structured electric fusion pipe fittings; the above-mentioned combination tool does not have a pressing part, or the width of the pressing part is too small, and it cannot play the role of re-pressing the adjacent completed buried wire seam, which may lead to the potential risk of the resistance wire easily falling off, or the final welding effect may not meet the expected requirements. Summary of the Invention

[0005] In response to the above technical problems, the present invention provides an electric fusion pipe wiring tool with a stress response function, which is characterized by including a slotter, a cutter, a jointer, a pressing part, a resistance wire, a fastening screw, and a rotating bearing. The top of the jointer is provided with a pressing part, the side of the jointer is provided with a mounting hole, the jointer has a hollow structure inside, and the slotter is installed in the hollow structure of the jointer. The slotter and the jointer are fixed together by fastening screws and mounting holes. A wire groove is provided inside the slotter, and the resistance wire passes through the wire groove. A cutter is provided on the slotter, and the slotter is connected to the rotating bearing.

[0006] The cutter and the slotter are an integrated structure, the seamer and the pressing part are an integrated structure, and the seamer is a hollow sleeve with a wall thickness of 1-5 cm.

[0007] The thickness of the cutter gradually decreases from the cutter seat to the cutting edge, and a wiring hole is provided near the cutter seat. The starting point of the cutter cutting edge is located at the center of the slotter cylinder.

[0008] The pressing part of the seamer is arranged on the side close to the cutter and has an inclined surface higher than the end surface. The pressing part is at 45° with the central axis of the seamer, and its top is lower than the height of the blade. By adjusting the height difference between the pressing part and the top of the blade, cutting of buried seams of different depths can be achieved.

[0009] The width radius of the pressed part is greater than the width of 2 to 3 buried seams.

[0010] The rotating bearing is clamped on the working position to provide the tool with any angle rotation.

[0011] The present invention has the following beneficial effects: the present invention mainly comprises a slotter and a jointer, and the jointer can be replaced according to different usage conditions. When replaced, it can be fixed by tightening bolts, which is simple and convenient. When used, the present invention can achieve cutting of buried seams of different depths by adjusting the height difference between the top of the pressing part and the blade part, and the two are fixed by tightening screws.

[0012] The present invention discloses a cutting blade on a slotting tool. The blade thickness gradually decreases from the blade seat to the cutting edge. When the front cutting edge cuts the buried wire seam, the rear edge of the blade temporarily expands the buried wire seam. Immediately before the opening retracts, the pressing portion of the presser presses the resistance wire into the buried wire seam, tightly enveloping the resistance wire as the opening retracts. The inner diameter of the tool presser is slightly larger than the outer diameter of the slotting tool handle, and the two are fixed by screws. The presser has a wall thickness of 1 to 5 cm and has an inclined surface near the cutting blade that is higher than the end surface. The inclined surface is at a 45-degree angle to the axial direction, and the top is lower than the cutting blade height. By adjusting the height difference between the pressing portion and the blade, the cutting depth of the buried wire seam can be achieved. The slotting tool is provided with a wire groove inside for routing the resistance wire to prevent it from falling out. The top portion of the pressing portion that contacts the pipe fitting is polished to press the buried wire seam, promote the closure of the opening, and improve the wrapping force of the opening on the resistance wire. At the same time, since the width radius of the pressed part is larger than the width of 2 to 3 sutures, the adjacent completed sutures can be pressed again to prevent the suture embedding process from negatively affecting the adjacent suture embedding effect, thereby further stabilizing the suture embedding effect.

[0013] The present invention is integrated and multifunctional. When used, it can simultaneously realize the functions of grooving, wiring, wire pressing and multiple pressing, eliminating the difficulty in assembling the combined tool, improving the stability and service life of the tool, and thus greatly improving the quality of the final product. The rotating bearing of the present invention can provide rotation at any angle. Under the action of the rotating force, the tool can automatically adjust its verticality with the buried wire seam according to the speed of the transmission device movement, which can effectively offset the stress generated by the change of the wire trough curvature during the wiring process without manual adjustment. Therefore, it can realize the cutting of large-span wire troughs and the needs of wiring in various complex forms, such as Figure 5 、 6 The three wiring types shown in Figures 7 and 7 have greatly expanded the application areas of existing equipment, reduced the processing difficulty of electric fusion pipe wiring to the greatest extent, and improved production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the side structure of the wiring tool of the present invention.

[0015] Figure 2 This is a schematic diagram of the side structure of the wiring tool of the present invention.

[0016] Figure 3 This is a structural diagram of the slotter of the present invention.

[0017] Figure 4 It is a schematic structural diagram of the seam sealer of the present invention.

[0018] Figure 5 This is a schematic diagram of the wiring structure of the present invention.

[0019] Figure 6 This is a schematic diagram of the wiring structure of the present invention.

[0020] Figure 7 This is a schematic diagram of the wiring structure of the present invention.

[0021] As shown in the figure, the tool body-1, slotter-2, cutter-3, seamer-4, pressing part-5, resistance wire-6, fastening screw-7, rotating bearing-8, and wire guide-9. DETAILED DESCRIPTION

[0022] The present invention is further described according to the figures:

[0023] The present invention provides an electric fusion pipe wiring tool, comprising a tool body 1, a slotter 2, a cutter 3, a jointer 4, a pressing portion 5, a resistance wire 6, a fastening screw 7, a rotating bearing 8, and a wire guide 9. The slotter 2 is connected to the rotating bearing 8. The jointer 4 has a pressing portion 5 at its top and a mounting hole on its side. The jointer 4 has a hollow interior, within which the slotter 2 is mounted. The slotter 2 and jointer 4 are secured together via the fastening screw 7 and the mounting hole. The slotter 2 has a wire guide 9 inside, through which the resistance wire 6 is inserted. The cutter 3 is disposed above the slotter 2. The cutter 3 and slotter 2 are integrally formed. The jointer 4 and the pressing portion 5 are also integrally formed. The thickness of the cutter 3 gradually decreases from the base to the blade, and a hole is provided near the base for inserting the resistance wire 6. The jointer 4 is a hollow casing with a wall thickness of 1-5 cm. The pressing portion 5 of the seamer 4 is positioned near the cutter 3 and features an inclined surface that extends beyond the end face. The pressing portion 5 is angled at a 45-degree angle to the central axis of the seamer 4, with its top edge below the height of the cutting edge. A rotating bearing 8 is locked in place, allowing the cutter to rotate at any angle. The radius of the pressing portion 5 is greater than the width of two to three buried seams.

[0024] When in use, the resistance wire 6 is passed through the wiring holes on the seam sealer 4 and behind the blade in sequence, and then pulled out a short distance to insert it into the hole seat of the cutter 3; according to the required embedding depth, the height difference between the top of the inclined surface of the pressing part 5 and the blade is adjusted, and the position of the two is fixed with a fastening screw 7;

[0025] Then, the tool is rotated and one end of the rotating bearing 8 is connected to the CNC machine tool and fixed with a limit device; the feed transmission device of the CNC machine tool is adjusted so that the blade is inserted into the specified position inside the pipe body and reaches the specified depth;

[0026] Turn on the tube rotating device on the CNC machine tool and start grooving and routing the inner wall of one end of the tube;

[0027] When the interior of one end of the tube meets the wiring requirements, the feed speed of the tool transmission device is increased, passing through the middle area of the tube with a large span, reaching the wiring area inside the other top of the tube. The feed speed of the tool transmission device is then reduced, and slotting and wiring begins inside the other end of the tube. The blade thickness gradually decreases from the blade seat to the cutting edge. When the front cutting edge cuts the buried seam, the rear edge of the blade temporarily expands the buried seam. Then, before the opening retracts, the pressing portion 5 of the press 4 presses the resistance wire 6 into the buried seam, so that the retracted opening tightly wraps the resistance wire 6. While pressing the resistance wire 6 into the buried seam, the pressing portion 5 also presses the buried seam, promoting the closure of the opening and increasing the wrapping force of the opening on the resistance wire 6. In addition, because the width radius of the pressing portion 5 is 2 to 3 times the width of the buried seam, adjacent completed buried seams can be pressed again to prevent the buried seam from negatively affecting the adjacent buried seam, thereby further stabilizing the buried seam effect. After the wiring is completed, cut the resistance wire 6 and remove the tube body from the fixture on the CNC machine tool.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principles of the present invention. These improvements should also be regarded as within the scope of protection of the present invention.

Claims

1. An electric fusion pipe wiring tool with stress response function, characterized in that The invention comprises a slotter, a cutter, a jointer, a pressing part, a resistance wire, a fastening screw, and a rotating bearing. The jointer is connected to the rotating bearing, a pressing part is provided at the top of the jointer, the jointer has a hollow structure inside, the slotter is installed in the hollow structure of the jointer, the slotter and the jointer are fixed together by fastening screws and mounting holes, a wire groove is provided inside the slotter, a resistance wire is passed through the wire groove, and a cutter is provided on the slotter; The cutter and slotter are an integrated structure, the seamer and the pressing part are an integrated structure, and the seamer is a hollow sleeve with a wall thickness of 1-5 cm; The specific usage of the above wiring tool is as follows: Pass the resistance wire through the wiring holes behind the seam sealer and the cutter blade in turn, pull it out a short distance and insert it into the hole seat of the cutter; Adjust the height difference between the top of the bevel of the pressing part and the blade according to the required embedding depth, and fix the position of the two with a fastening screw; Then connect one end of the tool rotating bearing to the CNC machine tool and fix it with a limit device; Adjust the CNC machine tool's feed drive device so that the blade is inserted into the pipe to the required depth; The tube rotating device on the CNC machine tool is turned on to start grooving and wiring the inner wall of one end of the tube body; when the interior of one end of the tube body meets the wiring requirements, the feed speed of the tool transmission device is increased, and the tool passes through the middle area of the tube body with a large span to reach the wiring area inside the other top of the tube body, and the feed speed of the tool transmission device is reduced to start grooving and wiring inside the other end of the tube body; the thickness of the blade gradually decreases from the tool seat to the cutting edge, and when the front end cutting edge cuts the buried wire seam, the rear end of the blade will temporarily expand the buried wire seam, and then the pressing part of the presser presses the resistance wire into the buried wire seam before the opening retracts, so that the retracted opening tightly wraps the resistance wire; While pressing the resistance wire into the buried seam, the pressing part will also press the buried seam to promote the closure of the opening and improve the wrapping force of the opening on the resistance wire; In addition, since the width radius of the pressed part is the width of 2 to 3 buried wire seams, the adjacent completed buried wire seams are pressed again to prevent the buried wire process from having a negative impact on the adjacent buried wire effects, thereby further stabilizing the buried wire effects until the wiring is completed, the resistance wire is cut, and the tube body is removed from the fixture on the CNC machine tool.

2. The electric fusion pipe wiring tool with stress response function according to claim 1, characterized in that The thickness of the cutter gradually decreases from the cutter seat to the blade, and a wiring hole is provided near the cutter seat. The starting point of the cutter blade is located at the center of the slotter cylinder.

3. The electrofusion pipe wiring tool with stress response function according to claim 1, characterized in that A wire groove is provided inside the slotting device.

4. The electrofusion pipe wiring tool with stress response function according to claim 1, characterized in that The pressing part of the seamer is arranged on the side close to the cutter and has an inclined surface higher than the end surface. The pressing part is 45 degrees with the central axis of the seamer, and its top is lower than the height of the blade.

5. The electrofusion pipe wiring tool with stress response function according to claim 1, characterized in that By adjusting the height difference between the pressing part and the top of the blade, the cutting of buried seams of different depths can be achieved.

6. The electrofusion pipe wiring tool with stress response function according to claim 1, characterized in that The width radius of the pressed part is 2-3 times the width of the buried suture.

7. The electrofusion pipe wiring tool with stress response function according to claim 1, characterized in that The rotating bearing is clamped on the working position to provide the tool with any angle rotation.

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