A wire winding and forming device for a heating wire in a liquid heater

Abstract

The present invention relates to the technical field of heating wire processing equipment, and specifically relates to a wire winding and forming device for a heating wire in a liquid heater; it includes an inner rod and an outer sleeve sleeved on the outer wall of the inner rod; the axial length of the inner rod is greater than the axial length of the outer sleeve; an inner hole is provided on the outer wall of the inner rod; the aperture of the inner hole is adapted to the diameter of the wire; an outer groove is provided through the inner and outer walls of the outer sleeve; the wire can pass through the outer groove and be inserted into the inner hole; a spiral strip is provided between the outer wall of the inner rod and the inner wall of the outer sleeve; the outer diameter of the spiral strip is adapted to the inner diameter of the outer sleeve; by moving the wire into the spiral-shaped spiral channel, each part of the wire can be corrected and shaped under the guiding and restricting of the spiral channel, realizing the precise winding of the inner and outer diameters and the pitch of the wire. Compared with the existing distributed winding of spiral wires, the winding accuracy and efficiency of the heating wire are both improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heating wire processing equipment, and specifically relates to a wire winding and forming equipment for heating wires in liquid heaters. Background Art

[0002] The forming steps of conventional heating wires are as follows: first, the resistance wire is wound into a spiral shape while maintaining a certain tension and pitch. Then, the wound spiral wire is heat-treated at a high temperature to eliminate stress. Finally, it is cooled to form a heating wire. The heating wire in a liquid heater is one of the important parts of the liquid heater. The precision requirements for the heating wire in a liquid heater are higher than those of traditional heating wires. Deviations in the inner diameter and outer diameter of the formed heating wire will affect the assembly and use of the heating wire. In addition, deviations in the pitch will also affect the performance of the heating wire. Therefore, the precision requirements for the heating wire applied to liquid heaters are relatively high.

[0003] The current method for winding heating wires with relatively high precision in the industry is to first wind the resistance wire on the outer wall of a rod to limit the inner diameter of the formed heating wire, and then send the heating wire wound on the rod into the inner side of a pipe to limit the outer diameter of the formed heating wire. In summary, the limitation of the inner diameter and outer diameter of the heating wire is completed in two winding steps, which will not only make the winding and forming steps of the heating wire cumbersome but also affect the forming efficiency of the heating wire. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art, the present invention provides a wire winding and forming equipment for heating wires in liquid heaters. By moving the wire into a spiral channel, each part of the wire can be corrected and shaped under the guiding and limiting action of the spiral channel, realizing the precise winding of the inner and outer diameters and pitch of the wire. Compared with the existing method of winding spiral wires separately, the winding precision and efficiency of the heating wire are both improved.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: A wire winding and forming equipment for heating wires in liquid heaters according to the present invention includes an inner rod and an outer sleeve sleeved on the outer wall of the inner rod; the axial length of the inner rod is greater than the axial length of the outer sleeve; an inner hole is provided on the outer wall of the inner rod; the aperture of the inner hole is adapted to the diameter of the wire; an outer groove runs through the inner and outer walls of the outer sleeve; the wire can pass through the outer groove and be inserted into the inner hole; a spiral strip is provided between the outer wall of the inner rod and the inner wall of the outer sleeve; the outer diameter of the spiral strip is adapted to the inner diameter of the outer sleeve; the inner diameter of the spiral strip is adapted to the outer diameter of the inner rod; a spiral channel is provided at the position where the spiral strip contacts the outer wall of the inner rod; the end of the spiral channel runs through the end of the spiral strip; the cross-section of the spiral channel is in tangential contact with the outer wall of the wire; the spiral strip is connected to the outer sleeve; the wire can enter the spiral channel after the inner rod rotates to form a spiral heating wire.

[0006] Preferably, both ends of the spiral channel are an inlet end and an outlet end respectively; the wire enters from the inlet end and exits from the outlet end; two guiding blocks are fixedly connected to the spiral strip near the inlet end; the distance between the two guiding blocks increases as it moves away from the inlet end; the wire can enter the spiral channel under the guidance of the two guiding blocks.

[0007] Preferably, an anti-slip pin is inserted into the outer wall of one end of the inner rod; a threaded hole is provided at the end of the inner rod away from the anti-slip pin; the threaded hole communicates with the inner hole; a bolt is threadedly connected in the threaded hole; one end of the wire is inserted into the inner hole and extends to the threaded hole and is then tightened by the bolt.

[0008] Preferably, the spiral strip is elastic; the spiral strip near the outlet end of the spiral channel is rotatably connected to the inner wall of the outer sleeve through a rotating block; an adjusting rod is fixedly connected to the spiral strip near the inlet end of the spiral channel; the other end of the adjusting rod extends to the outside of the outer sleeve, and the adjusting rod can adjust the axial position of the end of the spiral strip away from the rotating block inside the outer sleeve; the outer groove is strip-shaped, and the length direction of the outer groove is consistent with the axial direction of the outer sleeve; the outer groove can cover the axial movement range of the inlet end of the spiral channel.

[0009] Preferably, a locking groove is provided through the inner and outer walls of the outer sleeve; the long locking groove is arranged along the axial direction of the outer sleeve; a locking rod is rotatably connected in the locking groove through a torsion spring; one end of the locking rod is fixedly connected to a screwing rod; one end of the screwing rod extends to one end of the outer sleeve and is rotatably connected to the outer sleeve; locking blocks are uniformly fixedly connected to the outer wall of the locking rod along the axial direction; the locking blocks can extend to the inside of the outer sleeve; the part of the spiral strip near the locking groove can be locked by the corresponding locking blocks.

[0010] Preferably, spiral protrusions are provided on the outer edge of the spiral strip; the spiral line of the spiral protrusions is adapted to the spiral line of the spiral strip; the spiral strip contacts the inner wall of the outer sleeve through the spiral protrusions; the locking blocks extend towards the inside of the outer sleeve to the position of the spiral protrusions; the distance between adjacent locking blocks is adapted to the thickness of the spiral protrusions.

[0011] Preferably, an auxiliary cylinder is fixedly connected to the end of the inner rod away from the wire entering the spiral channel; the inner wall of the auxiliary cylinder is in movable sealing contact with the outer wall of the outer sleeve; a retaining ring is fixedly connected to the outer wall of the end of the spiral strip near the wire exiting the spiral channel; the inner diameter of the retaining ring is adapted to the outer diameter of the inner rod; the outer diameter of the retaining ring is adapted to the inner diameter of the outer sleeve; the auxiliary cylinder can form a negative pressure on the spiral channel when moving away from the retaining ring; the cross-section of the spiral channel is rectangular and can be in tangential contact with the outer wall of the wire.

[0012] Preferably, the groove wall of the outer groove where the on-line wire is pressed after rotating with the inner rod is called the pressed wall; a pressed groove is provided on the pressed wall of the outer groove; a plurality of pressed blocks are slidably connected in the pressed groove; the plurality of pressed blocks are slidably and sealingly connected to the pressed groove; the plurality of pressed blocks are distributed along the length direction of the outer groove; adjacent pressed blocks are slidably in contact and sealed; the pressed blocks are connected to the bottom of the pressed groove through elastic members; and a medium is filled in the pressed groove.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. By moving the wire into the spiral-shaped spiral track, each part of the wire can be corrected and shaped under the guiding and restricting action of the spiral track, realizing the precise winding of the inner and outer diameters and pitch of the wire. Compared with the existing distributed winding of spiral wires, the winding accuracy and efficiency of the heating wire are both improved.

[0015] 2. By controlling the expansion and contraction of the elastic spiral strip and locking it with the locking block, the pitch of the spiral track inside the spiral strip can be changed, and then the winding forming equipment of the heating wire with different pitches can be adjusted according to the product requirements, making the applicable range of the winding forming equipment wider.

[0016] 3. A negative pressure is formed inside the auxiliary cylinder. The outside air will enter the inside of the outer sleeve along the inner side of the end of the outer sleeve far from the auxiliary cylinder, and enter the gap between the wire and the spiral track along the spiral track and the end of the wire. The air flow will flow between the gap between the spiral track and the outer wall of the wire, so as to timely extract the debris left by the wear of the wire along the spiral track into the inside of the auxiliary cylinder. On the one hand, it avoids the wear of the debris on the outer wall of the wire, and on the other hand, it reduces the friction between the wire and the inner wall of the spiral track, enabling the wire to be better bent, corrected and shaped under less resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the drawings and embodiments.

[0018] Figure 1 is a three-dimensional view of the present invention;

[0019] Figure 2 is Figure 1 a three-dimensional view from another angle;

[0020] Figure 3 is an axial sectional view of the present invention;

[0021] Figure 4 is Figure 3 an enlarged view of part A in

[0022] Figure 5 is a radial sectional view of the present invention;

[0023] Figure 6 It is a three-dimensional view of the inner rod and the spiral strip in the present invention;

[0024] Figure 7 It is a three-dimensional view of the cooperation between the spiral strip and the lock block of the present invention;

[0025] Figure 8 It is a three-dimensional view of the outer sleeve of the present invention.

[0026] In the figure: inner rod 1, inner hole 11, anti-slip pin 12, threaded hole 13, bolt 14, outer sleeve 2, outer groove 21, pressure-receiving wall 211, pressure-receiving groove 212, pressure-receiving block 213, elastic member 214, lock groove 22, torsion spring 23, lock rod 24, screwing rod 25, lock block 26, spiral strip 3, spiral track 31, entry end 32, exit end 33, guide block 34, rotating block 35, adjusting rod 36, spiral protrusion 37, retaining ring 38, auxiliary cylinder 4. Detailed implementation manners

[0027] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0028] As Figures 1 to 8 shown, the present invention includes the following embodiments.

[0029] Embodiment 1:

[0030] A wire winding and forming device for a heating wire in a liquid heater, comprising an inner rod 1 and an outer sleeve 2 sleeved on the outer wall of the inner rod 1; the axial length of the inner rod 1 is greater than the axial length of the outer sleeve 2; an inner hole 11 is provided on the outer wall of the inner rod 1; the aperture of the inner hole 11 is adapted to the diameter of the wire; an outer groove 21 is provided through the inner and outer walls of the outer sleeve 2; the wire can pass through the outer groove 21 and be inserted into the inner hole 11; a spiral strip 3 is provided between the outer wall of the inner rod 1 and the inner wall of the outer sleeve 2; the outer diameter of the spiral strip 3 is adapted to the inner diameter of the outer sleeve 2; the inner diameter of the spiral strip 3 is adapted to the outer diameter of the inner rod 1; a spiral track 31 is provided at the position where the spiral strip 3 contacts the outer wall of the inner rod 1; the end of the spiral track 31 penetrates the end of the spiral strip 3; the cross-section of the spiral track 31 is in tangential contact with the outer wall of the wire; the spiral strip 3 is connected to the outer sleeve 2; the wire can enter the spiral track 31 to form a spiral heating wire after the inner rod 1 rotates.

[0031] The two ends of the spiral track 31 are respectively an entry end 32 and an exit end 33; the wire enters from the entry end 32 and exits from the exit end 33; two guide blocks 34 are fixedly connected to the spiral strip 3 near the entry end 32; the distance between the two guide blocks 34 increases as it is farther away from the entry end 32; the wire can enter the spiral track 31 under the guidance of the two guide blocks 34.

[0032] An anti-slip pin 12 is inserted into the outer wall of one end of the inner rod 1; a threaded hole 13 is provided at the end of the inner rod 1 away from the anti-slip pin 12; the threaded hole 13 is connected to the inner hole 11; the inner thread of the threaded hole 13 is connected to a bolt 14; one end of the wire is inserted into the inner hole 11 and extends to the threaded hole 13 and is tightened by the bolt 14.

[0033] The current method of heating wire winding with high precision in the industry is to first wind the resistance wire on the outer wall of the rod to limit the inner diameter of the heating wire after forming, and then feed the heating wire wound on the rod into the inner side of the pipe to limit the outer diameter of the heating wire after forming. In summary, the limitation of the inner diameter and outer diameter of the heating wire is completed in two winding steps, which will make the winding forming steps of the heating wire complicated and affect the forming efficiency of the heating wire.

[0034] Therefore, when the staff of the present invention needs to wind the heating wire in the liquid heater, they first clamp the outer wall of the outer sleeve 2 on the clamping fixture, and then keep the inner hole 11 on the outer wall of the inner rod 1 aligned with the outer groove 21, and then put the resistance wire, that is, one end of the wire, along the outer groove 21 and through the outer groove 21, so that the one end of the wire is inserted into the inner hole 11 on the outer wall of the inner rod 1 after passing through the outer groove 21, and the one end of the wire will be inserted into the inner hole 11 and extend into the threaded hole 13, and then the bolt 14 is turned and rotated in the threaded hole 13, so that the bolt 14 moves close to the bottom of the threaded hole 13 after being turned, and the bolt 14 will contact with one end of the wire after being turned, and the one end of the wire inserted into the threaded hole 13 is bent after being pressed against the end of the bolt 14, so as to achieve locking of one end of the wire;

[0035] Then rotate the inner rod 1. The rotation of the inner rod 1 can also be driven by the driving assembly. It should be noted that the driving assembly does not limit the axial freedom of the inner rod 1. As the inner rod 1 rotates, the inner rod 1 will drive one end of the wire in the inner hole 11 to be offset from the outer groove 21, so that the wire entering the outer groove 21 is bent accordingly. As the inner rod 1 rotates, the inner rod 1 will drive one end of the wire in the inner hole 11 to enter between the two guide blocks 34, and enter the entry end 32 of the spiral path 31 under the guidance of the guide blocks 34. As the inner rod 1 continues to rotate, the inner rod 1 will drive one end of the wire along the entry end 32 of the spiral path 31 to enter the inner side of the spiral path 31, and move along the spiral direction of the spiral path 31, so that the wire as a whole enters the spiral path 31 and is corrected. The outer wall of the wire is in tangential contact with the inner wall of the spiral path 31. The pitch and inner and outer diameters of the spiral path 31 can limit the wire, so that the wire entering the spiral path 31 is corrected more regularly.

[0036] During the rotation of the inner rod 1, axial movement will also occur due to the activities of the spiral track 31 and the wire. When the inner rod 1 rotates continuously, it will drive one end of the wire to move out from the outlet end 33 of the spiral track 31. Until the other end of the wire also moves out from the outlet end 33 of the spiral track 31 following the rotation of the inner rod 1, the winding of the wire is completed. Each part of the wire will pass through the inner wall of the spiral track 31, enabling each position of the wire to be repeatedly corrected, making the precision of the spiral formed by the wire after correction higher. Finally, reverse the bolt 14 to make the bolt 14 away from the bottom of the threaded hole 13, releasing the clamping of one end of the wire. Then, after pulling out one end of the wire from the inner hole 11, directly pull off the spiral wire from the end of the inner rod 1 away from the anti-slip pin 12. Finally, heat and cool the spiral wire to form a heating wire;

[0037] In this embodiment, by moving the wire into the spiral-shaped spiral track 31, each part of the wire can be corrected and shaped under the guiding and restricting of the spiral track 31, realizing the precise winding of the inner and outer diameters and pitch of the wire. Compared with the existing distributed winding of spiral wires, the winding precision and efficiency of the heating wire are both improved.

[0038] Embodiment 2:

[0039] The spiral strip 3 has elasticity; the spiral strip 3 is rotatably connected to the inner wall of the outer sleeve 2 through a rotating block 35 near the outlet end 33 of the spiral track 31; a regulating rod 36 is fixedly connected to the spiral strip 3 near the inlet end 32 of the spiral track 31; the other end of the regulating rod 36 extends to the outside of the outer sleeve 2, and the regulating rod 36 can adjust the axial position of the end of the spiral strip 3 away from the rotating block 35 inside the outer sleeve 2; the outer groove 21 is strip-shaped, and the length direction of the outer groove 21 is consistent with the axial direction of the outer sleeve 2; the outer groove 21 can cover the axial movement range of the inlet end 32 of the spiral track 31.

[0040] A locking groove 22 is provided through the inner and outer walls of the outer sleeve 2; the long strip-shaped locking groove 22 is arranged along the axial direction of the outer sleeve 2; a locking rod 24 is rotatably connected to the locking groove 22 through a torsion spring 23; one end of the locking rod 24 is fixedly connected to a screwing rod 25; one end of the screwing rod 25 extends to one end of the outer sleeve 2 and is rotatably connected to the outer sleeve 2; locking blocks 26 are fixedly connected to the outer wall of the locking rod 24 along the axial direction; the locking blocks 26 can extend to the inside of the outer sleeve 2; the part of the spiral strip 3 near the locking groove 22 can be locked by the corresponding locking blocks 26.

[0041] Spiral protrusions 37 are arranged on the outer edge of the spiral strip 3; the spiral line of the spiral protrusions 37 is adapted to the spiral line of the spiral strip 3; the spiral strip 3 contacts the inner wall of the outer sleeve 2 through the spiral protrusions 37; the locking blocks 26 extend towards the inside of the outer sleeve 2 to the position of the spiral protrusions 37; the distance between adjacent locking blocks 26 is adapted to the thickness of the spiral protrusions 37 (only for simplification in the drawings and does not represent the actual size).

[0042] Before the wire needs to be wound and formed by the staff, the pitch of the spiral heating wire after forming will be adjusted according to the drawing. Specifically, the forming equipment is adjusted. When the turning rod 25 is turned, it will drive the locking rod 24 to rotate in the locking groove 22 against the torsion spring 23. The locking rod 24 will drive the locking block 26 to move from the inner side of the outer sleeve 2 into the locking groove 22. That is, the locking block 26 will disengage from the locking and restriction of the spiral protrusion 37 after the locking rod 24 rotates, so that the spiral protrusion 37 can change with the expansion and contraction of the spiral bar 3. The staff will pull or push the adjusting rod 36 according to the drawing requirements. The adjusting rod 36 is located outside the outer sleeve 2, which is convenient for the staff to operate;

[0043] The adjusting rod 36 is connected to the end of the spiral bar 3 far from the rotating block 35. Therefore, one end of the spiral bar 3 close to the inlet end 32 of the spiral channel 31 will move closer to or away from the rotating block 35 under the control of the adjusting rod 36. In this way, the spiral bar 3 is stretched or compressed. Since the spiral bar 3 can be understood as a spring, the spirals of each part can change synchronously during the stretching or compression process. The spiral protrusion 37 will change with the change of the spiral bar 3. The spiral protrusion 37 will move in the length direction of the locking groove 22. After the pitch of the spiral bar 3 is adjusted, the turning rod 25 is released, and the locking rod 24 will rotate in the locking groove 22 under the action of the torsion spring 23. The locking rod 24 will drive the locking block 26 to move from the locking groove 22 towards the inner side of the outer sleeve 2, so that the locking block 26 is stuck around the spiral protrusion 37 under the drive of the locking rod 24;

[0044] Compared with the case of being stuck on the outer edge of the spiral bar 3 originally, the spiral protrusion 37 is thinner. In this way, even when the pitch of the spiral bar 3 changes slightly, it can still be locked by the locking block 26. After the locking rod 24 rotates, the locking block 26 will move relatively to the periphery of the corresponding spiral protrusion 37. The part of the spiral protrusion 37 close to the locking groove 22 will enter the gap position between the corresponding two locking blocks 26, so that the part of the spiral protrusion 37 close to the locking groove 22 is stuck. In this way, the part of the spiral protrusion 37 close to the locking groove 22 cannot generate axial movement of the outer sleeve 2, realizing the complete locking of each part of the spiral bar 3;

[0045] In this embodiment, by controlling the expansion and contraction of the elastic spiral bar 3 and locking it with the locking block 26, the pitch of the spiral channel 31 inside the spiral bar 3 is changed, and then the adjustment of the wire winding and forming equipment with different pitches can be carried out according to the product requirements, making the applicable range of the wire winding and forming equipment wider.

[0046] Embodiment 3:

[0047] One end of the inner rod 1 away from the spiral channel 31 where the wire enters is fixedly connected with an auxiliary cylinder 4; the inner wall of the auxiliary cylinder 4 is in movable sealing contact with the outer wall of the outer sleeve 2; one end of the outer wall of the spiral strip 3 close to the end where the spiral channel 31 exits the wire is fixedly connected with a retaining ring 38; the inner diameter of the retaining ring 38 is adapted to the outer diameter of the inner rod 1; the outer diameter of the retaining ring 38 is adapted to the inner diameter of the outer sleeve 2; when the auxiliary cylinder 4 moves away from the retaining ring 38, a negative pressure can be formed on the spiral channel 31; the cross-section of the spiral channel 31 is rectangular and can be in tangential contact with the outer wall of the wire.

[0048] After one end of the wire enters one end of the spiral channel 31 following the rotation of the inner rod 1, the wire will move along the spiral direction of the spiral channel 31 during the rotation of the inner rod 1. During the process of the wire being corrected and shaped in the spiral channel 31, fine debris will be formed due to wear. During the movement of the wire along the spiral channel 31, the inner rod 1 will move axially with the outer sleeve 2. The inner rod 1 will drive the auxiliary cylinder 4 to move axially with the outer sleeve 2. The inner rod 1 will drive the auxiliary cylinder 4 to move away from the retaining ring 38, causing a negative pressure to be formed inside the auxiliary cylinder 4. External gas will enter the inner side of the outer sleeve 2 along the inner side of the end of the outer sleeve 2 away from the auxiliary cylinder 4, and enter the gap between the wire and the spiral channel 31 along the spiral channel 31 and one end of the wire. The air flow will flow along the gap between the spiral channel 31 and the outer wall of the wire, so as to timely extract the debris left by the wear of the wire along the spiral channel 31 into the inner side of the auxiliary cylinder 4. On the one hand, this can avoid the wear of the debris on the outer wall of the wire, and on the other hand, it can reduce the friction between the wire and the inner wall of the spiral channel 31, enabling the wire to be better bent, corrected and shaped with less resistance.

[0049] The auxiliary cylinder 4 will disengage from the outer wall of the outer sleeve 2 as it moves away from the retaining ring 38, and the wire forming a spiral will also disengage from the spiral channel 31. It should be noted that the anti-slip pin 12 is detachable. After the inner rod 1 is withdrawn from the inside of the spiral strip 3, the wire is removed from the outside of the inner rod 1. After the impurities inside the auxiliary cylinder 4 are cleaned, the inner rod 1 is reinstalled inside the spiral strip 3. The air pressure formed when the auxiliary cylinder 4 approaches the baffle will flow in the reverse direction along the spiral channel 31 for cleaning.

[0050] Embodiment 4:

[0051] The groove wall of the outer groove 21 that is pressed when the wire rotates with the inner rod 1 is called the pressed wall 211; the pressed wall 211 of the outer groove 21 is provided with a pressed groove 212; a plurality of pressed blocks 213 are slidably connected inside the pressed groove 212; the plurality of pressed blocks 213 are slidably and sealingly connected with the pressed groove 212; the plurality of pressed blocks 213 are distributed along the length direction of the outer groove 21; adjacent pressed blocks 213 are in sliding contact and sealing; the pressed blocks 213 are connected with the bottom of the pressed groove 212 through elastic members 214; the pressed groove 212 is filled with a medium.

[0052] After the wire passes through the outer groove 21 and is inserted into the inner hole 11, the inner rod 1 will drive one end of the wire to be staggered with the outer groove 21, and the inner rod 1 will drive one end of the wire to move toward the entrance end 32 of the spiral path 31. The wire will move toward the pressure wall 211 under the rotation of the inner rod 1, so that the wire will squeeze the pressure block 213 on the pressure wall 211. The width of the pressure block 213 is adapted to the outer diameter of the wire. One of the pressure blocks 213 will move toward the bottom of the pressure groove 212 after the wire is squeezed, thereby squeezing the medium inside the pressure groove 212, so that the other pressure blocks 213 will slightly extend from the pressure groove 212 under the transmission of the medium. In this way, there is only one pressure block 213 in the outer groove 21 that is squeezed by the wire and retracted, while the other pressure blocks 213 are extended. The pressure block 213 retracted into the pressure groove 212 is a vacant position for the wire, and the pressure block 213 extended into the pressure groove 212 can limit other positions of the wire, thereby preventing the wire from moving in the outer groove 21, so that the part of the wire passing through the outer groove 21 is limited, so that the part of the wire in the outer groove 21 is always in a position close to the entrance end 32 of the spiral path 31, thereby improving the smoothness of the wire entering the entrance end 32 of the spiral path 31, thereby improving the stability of the wire winding molding;

[0053] When the wire is not inserted into the outer groove 21 or is removed from the outer groove 21, all the pressure blocks 213 will restore to a flush state under the action of their respective elastic members 214 to prepare for the next wire to enter the outer groove 21. The outer groove 21 is set in a long strip shape to meet the pitch change requirements of the adjustable spiral strip 3.

[0054] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0055] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A winding and forming device for heating wires in a liquid heater, characterized in that: It includes an inner rod and an outer sleeve sleeved on the outer wall of the inner rod; the axial length of the inner rod is greater than that of the outer sleeve; an inner hole is provided on the outer wall of the inner rod; the aperture of the inner hole is adapted to the diameter of the wire; an outer groove is penetrated through the inner and outer walls of the outer sleeve; the wire can pass through the outer groove and be inserted into the inner hole; a spiral strip is provided between the outer wall of the inner rod and the inner wall of the outer sleeve; the outer diameter of the spiral strip is adapted to the inner diameter of the outer sleeve; the inner diameter of the spiral strip is adapted to the outer diameter of the inner rod; a spiral channel is provided at the position where the spiral strip contacts the outer wall of the inner rod; the end of the spiral channel penetrates the end of the spiral strip; the cross section of the spiral channel is in tangential contact with the outer wall of the wire; the spiral strip is connected to the outer sleeve; the wire can enter the spiral channel after the inner rod rotates to form a spiral heating wire. Both ends of the spiral channel are respectively an entry end and an exit end; the wire enters from the entry end and exits from the exit end; two guiding blocks are fixedly connected at the position of the spiral strip close to the entry end; the distance between the two guiding blocks increases as it is farther away from the entry end; the wire can enter the spiral channel under the guidance of the two guiding blocks. The spiral strip has elasticity; the part of the spiral strip close to the exit end of the spiral channel is rotatably connected to the inner wall of the outer sleeve through a rotating block; an adjusting rod is fixedly connected to the part of the spiral strip close to the entry end of the spiral channel; the other end of the adjusting rod extends to the outside of the outer sleeve, and the adjusting rod can adjust the axial position of the end of the spiral strip away from the rotating block inside the outer sleeve; the outer groove is strip-shaped, and the length direction of the outer groove is consistent with the axial direction of the outer sleeve; the outer groove can cover the axial movement range of the entry end of the spiral channel.

2. The wire winding and forming device for a liquid heater according to claim 1, characterized in that: An anti-slip pin is inserted into the outer wall at one end of the inner rod; a threaded hole is provided at the end of the inner rod away from the anti-slip pin; the threaded hole is communicated with the inner hole; a bolt is threadedly connected in the threaded hole; one end of the wire is inserted into the inner hole and extends to the threaded hole and is tightened by the bolt.

3. The wire winding and forming device for a liquid heater according to claim 1, characterized in that: Lock grooves are penetrated through the inner and outer walls of the outer sleeve; the long strip-shaped lock grooves are arranged along the axial direction of the outer sleeve; a lock rod is rotatably connected in the lock grooves through a torsion spring; one end of the lock rod is fixedly connected with a screwing rod; one end of the screwing rod extends to one end of the outer sleeve and is rotatably connected with the outer sleeve; lock blocks are fixedly connected to the outer wall of the lock rod along the axial direction at equal intervals; the lock blocks can extend to the inner side of the outer sleeve; the part of the spiral strip close to the lock grooves can be locked by the corresponding lock blocks.

4. The winding and forming device for heating wires in a liquid heater according to claim 3, wherein: Spiral protrusions are provided on the outer edge of the spiral strip; the spiral line of the spiral protrusions is adapted to the spiral line of the spiral strip; the spiral strip contacts the inner wall of the outer sleeve through the spiral protrusions; the lock blocks extend towards the inner side of the outer sleeve to the position of the spiral protrusions; the distance between adjacent lock blocks is adapted to the thickness of the spiral protrusions.

5. A winding and forming device for a heating wire in a liquid heater according to claim 1, characterized in that: An auxiliary cylinder is fixedly connected to the end of the inner rod away from the entry end of the wire into the spiral channel; the inner wall of the auxiliary cylinder is in movable sealing contact with the outer wall of the outer sleeve; a retaining ring is fixedly connected to the outer wall of the part of the spiral strip close to the exit end of the wire from the spiral channel; the inner diameter of the retaining ring is adapted to the outer diameter of the inner rod; the outer diameter of the retaining ring is adapted to the inner diameter of the outer sleeve; the auxiliary cylinder can form a negative pressure on the spiral channel when moving away from the retaining ring; the cross section of the spiral channel is rectangular and can be in tangential contact with the outer wall of the wire.

6. A winding and forming device for a heating wire in a liquid heater according to claim 1, characterized in that: The groove wall of the outer groove where the on-line wire is pressed after rotating with the inner rod is called the pressed wall; a pressed groove is provided on the pressed wall of the outer groove; a plurality of pressed blocks are slidably connected in the pressed groove; the plurality of pressed blocks are slidably and sealingly connected to the pressed groove; the plurality of pressed blocks are distributed along the length direction of the outer groove; adjacent pressed blocks are in sliding contact and sealing; the pressed blocks are connected to the bottom of the pressed groove through elastic members; the pressed groove is filled with a medium.

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