Corrugated pipe and corrugated pipe threading processing equipment

Abstract

The utility model discloses a corrugated pipe and corrugated pipe threading processing equipment, and relates to the technical field of pipe fittings. The corrugated pipe comprises the corrugated pipe body and the spiral metal wire, and compared with the scheme that the corrugated pipe is formed by spirally winding a steel wire and then coating the outer portion of the steel wire with rubber, the corrugated pipe adopts the machining scheme that the corrugated pipe body is firstly prepared and formed, and then the metal wire is spirally wound in the inner thread groove of the corrugated pipe body. The spiral metal wire is exposed on the inner wall of the corrugated pipe body and is not covered by the plastic rubber coating, and the spiral metal wire can effectively support the corrugated pipe body, so that the overall structural strength of the corrugated pipe is improved, and the negative pressure bearing capacity of the corrugated pipe is higher. According to the corrugated pipe wire penetrating machining equipment, wire penetrating machining of the spiral metal wire in the internal thread groove of the corrugated pipe body can be achieved, the corrugated pipe wire penetrating machining equipment is novel and reasonable in structure and reliable and efficient in operation, and the machining efficiency of the corrugated pipe can be improved.

Description

Technical Field

[0001] This utility model relates to the field of pipe fittings technology, and in particular to a corrugated pipe and a corrugated pipe threading processing equipment. Background Technology

[0002] Common corrugated pipes are made by spirally winding steel wire and then coating it with plastic, so that both the inner and outer walls of the spiral steel wire are encapsulated with a plastic film layer. This type of corrugated pipe structure has a relatively low negative pressure bearing capacity and is prone to deformation under negative pressure conditions. Utility Model Content

[0003] The purpose of this invention is to provide a novel corrugated pipe and a corrugated pipe wire threading processing device. The corrugated pipe has an internal thread groove on the inner wall of a pre-formed corrugated pipe body, and a spiral metal wire is wound and embedded in the internal thread groove. Compared with the method of first spirally winding the steel wire and then coating it with rubber to form a corrugated pipe, the corrugated pipe has higher structural strength and stronger negative pressure bearing capacity, so as to solve the problems existing in the prior art.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] On the one hand, this utility model provides a corrugated pipe, comprising:

[0006] A corrugated pipe body, wherein the inner wall of the corrugated pipe body is provided with an internal threaded groove, and the outer wall of the corrugated pipe body is provided with an outwardly convex annular spiral line;

[0007] A spiral metal wire, which is wound along the internal thread groove and fitted and fixed inside the internal thread groove.

[0008] In some embodiments, the pitch of the internal thread groove is the same as the pitch of the annular helix, and the helical trajectories of the internal thread groove and the annular helix coincide internally and externally.

[0009] In some embodiments, the spiral wire is interference-fitted with the internal threaded groove.

[0010] In some embodiments, the spiral metal wire is a spiral steel wire.

[0011] On the other hand, this utility model proposes a corrugated pipe threading processing equipment, capable of processing any of the above-mentioned corrugated pipes, the corrugated pipe threading processing equipment comprising:

[0012] The metal wire winding and shaping part includes a mandrel and a rotation drive. The outer wall of the mandrel is provided with a metal wire winding groove that is adapted to the internal thread groove. The rotation drive is connected to the end of the mandrel and is used to drive the mandrel to rotate.

[0013] The wire feeding section is used to supply wire to the mandrel during the rotation of the mandrel, so that the wire is wound along the wire winding groove and fitted into the wire winding groove;

[0014] The corrugated tube wire threading section includes a corrugated tube fixing mechanism and a moving mechanism. The corrugated tube fixing mechanism is located on the outer periphery of the mandrel and is used to install the corrugated tube body so that the corrugated tube body is coaxially fitted onto the outside of the mandrel. The moving mechanism can drive the corrugated tube fixing mechanism to move along the axial direction of the mandrel during the rotation of the mandrel so that the metal wire wound in the metal wire winding groove is wound along the internal thread groove and fitted and fixed in the internal thread groove.

[0015] In some embodiments, the bellows fixing mechanism includes a connecting arm and a ring arranged coaxially with the mandrel. The ring is used to fit onto the outer wall of the bellows body, and the inner wall of the ring is provided with a ring spiral groove that matches the concave and convex shape of the annular spiral. The ring is connected to the moving mechanism through the connecting arm.

[0016] In some embodiments, the wire winding and shaping section further includes a mandrel support for supporting the mandrel, the mandrel support comprising:

[0017] Support for mounting the mandrel bracket;

[0018] Guide rollers are rotatably mounted on the top of the support and arranged parallel to the axial direction of the mandrel; guide rollers are provided on both sides of the top of the support, and the mandrel is supported between the two guide rollers. Each guide roller is used to roll in cooperation with the mandrel.

[0019] In some embodiments, the mandrel support further includes a guide roller adjusting mechanism, wherein at least one guide roller is mounted on the support via the guide roller adjusting mechanism, and the guide roller adjusting mechanism includes:

[0020] A pair of vertical sliding grooves are symmetrically opened on the top of the support, and a pin hole is provided on both sides of the top of each of the vertical sliding grooves.

[0021] A pair of roller bearing seats are slidably assembled in the two vertical grooves, and each of the two roller bearing seats has a pin hole two for aligning with the pin hole one at its far ends; the two ends of the guide roller shaft are movably inserted into the two roller bearing seats at their close ends.

[0022] A pin is used to insert and fix the roller seat to the vertical slide groove so that the guide roller rolls in the support position and engages with the mandrel, or to disassemble and separate the roller seat from the vertical slide groove so that the guide roller descends along the vertical slide groove and the ring passes through;

[0023] Multiple mandrel supports are arranged at intervals along the axial direction of the mandrel.

[0024] In some embodiments, the moving mechanism includes:

[0025] A slide rail, which is arranged parallel to the axial direction of the mandrel;

[0026] A mobile trolley includes a trolley platform, wheels, and a wheel drive. The corrugated pipe fixing mechanism and the wire feeding section are both disposed on the trolley platform and arranged along the axial direction of the mandrel. The corrugated pipe fixing mechanism is located at the end of the wire feeding section away from the rotary drive. The wheels are mounted on the bottom of the trolley platform and are adapted to roll along the slide rail. The wheel drive is used to drive the wheels to roll along the slide rail, thereby moving the corrugated pipe fixing mechanism along the axial direction of the mandrel.

[0027] In some embodiments, the front end of the mandrel is provided with a fixing structure for fixing the metal wire.

[0028] In some embodiments, the mandrel is a zinc rod.

[0029] The present invention achieves the following technical advantages over the prior art:

[0030] The corrugated pipe disclosed in this utility model includes a corrugated pipe body and a spiral metal wire. Compared with the method of first spirally winding the steel wire and then coating it with plastic to form a corrugated pipe, the corrugated pipe of this utility model adopts a processing method of first preparing and forming a corrugated pipe body, and then spirally winding the metal wire in the inner thread groove of the corrugated pipe body. In the processed corrugated pipe, the spiral metal wire is exposed on the inner wall of the corrugated pipe body and is not covered by plastic coating. The spiral metal wire can effectively support the corrugated pipe body, thereby improving the overall structural strength of the corrugated pipe and making it stronger in bearing negative pressure.

[0031] The bellows wire threading equipment disclosed in this utility model can realize the threading of spiral metal wire in the internal thread groove of the bellows body. In the prepared bellows, the spiral metal wire is exposed on the inner wall of the bellows body and is not covered by plastic coating. The spiral metal wire can effectively support the bellows body, thereby improving the overall structural strength of the bellows and making its negative pressure bearing capacity stronger.

[0032] Furthermore, the corrugated pipe wire threading processing equipment disclosed in this utility model has a novel and reasonable structure. Relying on the rotation of the mandrel, it can simultaneously realize the winding and supply of metal wire on the mandrel and the wire threading processing into the internal thread groove of the corrugated pipe body. It is reliable and efficient in operation and can improve the processing efficiency of corrugated pipes. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of the bellows body in the bellows disclosed in the embodiments of this utility model;

[0035] Figure 2 This is a top view schematic diagram of the overall structure of the corrugated pipe wire threading processing equipment disclosed in this utility model embodiment;

[0036] Figure 3 This is a schematic diagram of the overall structure of the corrugated pipe wire threading processing equipment disclosed in the embodiments of this utility model;

[0037] Figure 4 This is a schematic diagram showing the cooperation between the bellows fixing mechanism and the mandrel disclosed in an embodiment of this utility model;

[0038] Figure 5 This is a schematic diagram of the structure of the bellows fixing mechanism disclosed in this embodiment of the present utility model when fixing the bellows body;

[0039] Figure 6 This is a schematic diagram of the corrugated pipe fixing mechanism disclosed in an embodiment of the present utility model;

[0040] Figure 7 This is a schematic diagram of the front end structure of the mandrel disclosed in an embodiment of the present utility model;

[0041] Figure 8 This is a schematic diagram of the structure and installation of the guide roller adjustment mechanism disclosed in an embodiment of the present utility model;

[0042] Figure 9 This is a front view of the guide roller adjustment mechanism disclosed in an embodiment of the present utility model.

[0043] In the figure, the attached label is: 100 - Corrugated pipe wire threading equipment;

[0044] 1-Corrugated pipe body; 11-Internal threaded groove; 12-Circular helix;

[0045] 2-Metal wire;

[0046] 3-Metal wire winding and shaping section; 31-Mandrel; 311-Metal wire winding groove; 312-Fixing structure; 32-Rotation drive; 33-Mandrel support; 331-Support; 332-Guide roller; 333-Guide roller adjusting mechanism; 3331-Vertical chute; 3332-Pin hole one; 3333-Roller seat; 3334-Pin; 334-Support bracket;

[0047] 4-Metal wire feeding section;

[0048] 5- Corrugated pipe threading section; 51- Corrugated pipe fixing mechanism; 511- Connecting arm; 512- Ring sleeve; 5121- Ring sleeve spiral groove; 52- Moving mechanism; 521- Slide rail; 522- Moving trolley; 5221- Trolley platform; 5222- Wheel; 5223- Wheel drive. Detailed Implementation

[0049] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0050] One of the objectives of this invention is to provide a novel corrugated pipe, which has an internal threaded groove on the inner wall of a pre-formed corrugated pipe body, and a spiral metal wire is wound and embedded in the internal threaded groove. Compared with the method of first spirally winding the steel wire and then coating it with rubber to form a corrugated pipe, the corrugated pipe has higher structural strength and stronger negative pressure bearing capacity, thereby solving the problems existing in the prior art.

[0051] Another objective of this invention is to provide a corrugated pipe threading processing device capable of processing the aforementioned corrugated pipes.

[0052] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] Example 1

[0054] This embodiment provides a corrugated pipe, including a corrugated pipe body 1 and a spiral metal wire. The inner wall of the corrugated pipe body 1 is provided with an internally threaded groove 11, and the outer wall of the corrugated pipe body 1 is provided with an outwardly convex annular spiral line 12. The spiral metal wire is spirally wound along the internally threaded groove 11 and fitted and fixed in the internally threaded groove 11. Compared with the method of first spirally winding the steel wire and then coating it with plastic to form a corrugated pipe, the corrugated pipe in this embodiment adopts a processing method of first preparing and forming the corrugated pipe body 1, and then spirally winding the metal wire in the internally threaded groove 11 of the corrugated pipe body 1. In the processed corrugated pipe, the spiral metal wire is exposed on the inner wall of the corrugated pipe body 1 and is not covered by plastic coating. The spiral metal wire can effectively support the corrugated pipe body 1, thereby improving the overall structural strength of the corrugated pipe and making its negative pressure bearing capacity stronger.

[0055] In some feasible implementations, it is preferred that the pitch of the internal thread groove 11 is the same as the pitch of the annular helix 12, and that the helical trajectories of the internal thread groove 11 and the annular helix 12 coincide internally and externally.

[0056] In some feasible implementations, the spiral metal wire is generally a round metal wire with a circular cross-section. The groove width of the internal thread groove 11 is adapted to the outer diameter of the spiral metal wire, and the groove depth of the internal thread groove 11 is equal to or slightly greater than the diameter of the spiral metal wire, to ensure that the spiral metal wire is completely embedded in the internal thread groove 11 after threading. As a preferred embodiment, after the spiral metal wire is completely embedded in the internal thread groove 11, the spiral metal wire and the internal thread groove 11 can be interference-fitted, which can improve the fastening effect of the internal thread groove 11 on the spiral metal wire, thereby improving the structural strength and durability of the bellows. In addition, after the spiral metal wire is completely embedded in the internal thread groove 11, the spiral metal wire and the internal thread groove 11 can also be clearance-fitted. The groove depth and spiral layout of the internal thread groove 11 can restrict the axial movement of the spiral metal wire. With the addition of limiting structures or encapsulation structures at both ends of the internal thread groove 11, the spiral movement of the spiral metal wire can be effectively restricted. It should be noted that during the process of the spiral metal wire being threaded into the inner thread groove 11, the spiral metal wire is only partially embedded in the inner thread groove 11, so the spiral metal wire is able to move in a spiral motion relative to the inner thread groove 11.

[0057] In some feasible embodiments, the spiral wire is preferably a spiral steel wire. In other embodiments, the spiral wire may also be made of other materials besides steel wire, such as iron wire.

[0058] Example 2

[0059] like Figure 2 and Figure 3As shown, this embodiment proposes a corrugated pipe wire threading processing equipment 100, which can process the corrugated pipe of Embodiment 1. The corrugated pipe wire threading processing equipment 100 includes a metal wire winding and shaping part 3, a metal wire feeding part 4, and a corrugated pipe wire threading part 5.

[0060] The wire winding and shaping section 3 includes a mandrel 31 and a rotary drive 32. The outer wall of the mandrel 31 is provided with a spiral wire winding groove 311 that matches the internal thread groove 11. The rotary drive 32 is connected to the end of the mandrel 31 and is used to drive the mandrel 31 to rotate in place around its axis. The rotary drive 32 may include, but is not limited to, a motor, such as a stepper motor, and the output end of the stepper motor may be directly coaxially connected to the mandrel 31 via a coupling to drive the mandrel 31 to rotate.

[0061] The wire feeding section 4 is located on one side of the wire winding and shaping section 3. Its main function is to supply the wire 2 to the mandrel 31 during its rotation, allowing the wire 2 to spirally wind along the wire winding groove 311 and engage within it. This initial spiral shaping of the wire 2 is achieved through the wire winding groove 311, ensuring that the spiral direction of the wire 2 is basically consistent with the spiral direction of the internal thread groove 11 of the bellows body 1, laying the foundation for subsequent wire threading. It should be noted that although the wire 2 is engaged and wound within the wire winding groove 311, the groove does not clamp the wire 2. This ensures that during subsequent wire threading, the wire 2 can smoothly detach from the groove 311 and engage within the internal thread groove 11. The wire winding groove 311 only serves as a limiting auxiliary for the wire 2, assisting the bellows in wire threading.

[0062] The bellows threading section 5 includes a bellows fixing mechanism 51 and a moving mechanism 52. The bellows fixing mechanism 51 is located on the outer periphery of the mandrel 31 and is used to install the pre-prepared bellows body 1 so that the bellows body 1 is coaxially fitted onto the mandrel 31. The inner wall of the bellows body 1 and the outer wall of the mandrel 31 are generally clearance-fitted to ensure relative movement between the bellows body 1 and the mandrel 31. The moving mechanism 52 is connected to the bellows fixing mechanism 51 and can drive the bellows fixing mechanism 51 along the axial direction of the mandrel 31 from the head end to the end end (i.e., as the mandrel 31 rotates) during rotation. Figure 2The wire 2, which is wound in the wire winding groove 311, moves from the left end to the right end to make the wire 2, which is wound in the wire winding groove 311, spirally wound along the internal thread groove 11 and fitted into the internal thread groove 11, so as to realize the transfer of the wire 2 from the wire winding groove 311 to the internal thread groove 11 and complete the wire threading process of the corrugated pipe body 1. It should be noted that during the continuous rotation of the mandrel 31, the wire feeding part 4 and the corrugated tube wire threading part 5 operate synchronously. Due to the limiting effect of the wire winding groove 31 on the wire 2 and the continuous feeding of the wire feeding part 4, the wire 2 will not be misaligned relative to the mandrel 31. Combined with the rotation of the mandrel 31, while the wire 2 is continuously wound towards the end on the mandrel 31, the wire 2 at the head end of the mandrel 31 is also gradually embedded in the internal thread groove 11 and spirally fed along the internal thread groove 11 until the corrugated tube fixing mechanism 51 moves to the end of the mandrel 31, completing the wire threading process of a section of the corrugated tube. At this time, the wire 2 is spiral in the internal thread groove 11, forming the spiral wire embedded in the internal thread groove 11 in Embodiment 1. Then, a common pipe circumferential cutting mechanism can be used to cut the wire-threaded corrugated pipe from the head end of the mandrel 31 and remove it from the mandrel 31. Then, the wire feeding part 4 and the corrugated pipe wire-threading part 5 return to the head end of the mandrel 31 to start the wire-threading process of a new section of the corrugated pipe body 1. During the wire-threading process of each section of the corrugated pipe body 1, the wire feeding part 4 reaches the end of the mandrel 31 before the corrugated pipe wire-threading part 5, and cuts the wire 2 after reaching the end of the mandrel 31.

[0063] In some feasible embodiments, the preferred bellows fixing mechanism 51 includes a connecting arm 511 and a ring 512 arranged coaxially with the mandrel 31. The ring 512 is used to fit onto the outer wall of the bellows body 1, and the inner wall of the ring 512 is provided with a ring spiral groove 5121 that matches the concave and convex shape of the annular spiral 12 to ensure protection of the shape and structure of the outer wall of the bellows body 1. The ring 512 is connected to the moving mechanism 52 through the connecting arm 511.

[0064] The aforementioned ring 512 is preferably an openable and closable ring, such as... Figures 4-6As shown, it includes a lower half-ring and an upper half-ring, with their ends detachably connected by bolts. To secure and protect the bellows body 1 from damage, it is preferable that the inner walls of both the lower and upper half-rings are provided with semi-circular rubber pads, which can be bonded to the lower and upper half-rings. The ring sleeve 512 is mainly used to clamp the end of the bellows body 1, gradually fitting the bellows body 1 onto the outside of the mandrel 31 as it moves from the head end to the tail end of the mandrel 31. When the bellows body 1 needs to be clamped, remove the bolts on both sides of the lower and upper half rings to separate them. Then, insert the end of the bellows body 1 into the lower half ring, fasten the upper half ring, and fix both ends of the lower and upper half rings with bolts. At this time, the ring sleeve 512 wraps around the outer circumference of the bellows body 1, and uses the friction generated by the contact between the rubber pad and the bellows body 1 to clamp the bellows body 1, preventing the bellows body 1 from moving or rotating relative to the ring sleeve 512 during the threading process (i.e., the bellows body 1 and the ring sleeve 512 always remain relatively stationary). The aforementioned ring sleeve spiral groove 5121 is provided on the inner side wall of the rubber pad. The lower and upper half rings are preferably metal half rings, and the lower half ring is connected to the connecting arm 511.

[0065] In some feasible implementations, the spiral groove 5121 of the ring sleeve is preferably cut according to the annular spiral line 12. Based on this, after the ring sleeve 512 is fitted with the annular spiral line 12 through the spiral groove 5121, the annular spiral line 12 also plays a limiting role on the ring sleeve 512, which can prevent the ring sleeve 512 from being displaced and falling off from the bellows body 1 when it moves along the mandrel axial direction to thread the wire.

[0066] In some feasible implementations, considering the relatively long length of the mandrel 31, to ensure that the mandrel 31 remains horizontal during rotation, the wire winding and shaping section 3 is also provided with a mandrel support 33 for supporting the mandrel 31. The mandrel support 33 includes a base 331 and a guide roller 332. The base 331 is used to mount the mandrel support 33. Specifically, the base 331 can be supported and mounted on the ground via a base bracket 334, so that the mandrel support 33 is stably mounted below the mandrel 31. The guide roller 332 is rotatably mounted on the top of the base 331 and arranged parallel to the axial direction of the mandrel 31; as... Figures 4-6 As shown, guide rollers 332 are provided on both sides of the top of the support 331. The guide rollers 332 on both sides are used to support the mandrel 31, and either guide roller 332 can rotate freely relative to the support 331 so as to roll with the mandrel 31 when the mandrel 31 rotates. As a preferred embodiment, two guide rollers 332 are preferably provided on each mandrel support 33, and the two guide rollers 332 are symmetrically distributed on both sides of the mandrel 31.

[0067] In some feasible implementations, considering that the outer diameter of the ring 512 is larger than the outer diameter of the mandrel 31, the guide roller 332 will obstruct the ring 512 when it passes through the mandrel support 33. Therefore, the mandrel support 33 is also provided with a guide roller adjustment mechanism 333. At least one guide roller 332 is mounted on the support 331 through the guide roller adjustment mechanism 333, so that the height of the guide roller 332 can be adjusted by the guide roller adjustment mechanism 333 to avoid the ring 512 and allow the ring 512 to pass smoothly. The guide roller adjustment mechanism 333 includes a pair of vertical grooves 3331 and a pin 3334, such as Figure 8 and Figure 9 As shown, a pair of vertical grooves 3331 are symmetrically opened on the top of the support 331, and each vertical groove 3331 has a pin hole 3332 on both sides of its top. A pair of roller bearing seats 3333 are slidably assembled in the two vertical grooves 3331, and each of the two roller bearing seats 3333 has a pin hole 2 for aligning with the pin hole 3332 at its far ends. The roller shaft of the guide roller 332 (which is coaxial with and fixed to the guide roller 332) is movably inserted into the two roller bearing seats 3333 at their close ends to ensure that the guide roller 332 can rotate freely relative to the roller bearing seats 3333. The pin 3334 passes through the pin hole 3332 of the vertical groove 3331 and the pin hole 2 of the roller bearing seat 3333 in sequence to insert and fix the roller bearing seat 3333 to the vertical groove 3331, thereby allowing the guide roller 332 to roll in cooperation with the mandrel 31 in the support position. Figure 8 The diagram shows the state of the guide roller 332 in the support position. Pulling out the pin 3334 allows the roller seat 3333 to be disassembled from the vertical slide groove 3331. At this time, the roller seat 3333 is lowered along the vertical slide groove 3331, which allows the guide roller 332 to be lowered along the vertical slide groove 3331. At this time, the guide roller 332 is lower than the aforementioned support position, which ensures that the ring 512 can pass through.

[0068] In each mandrel holder 33, only one side of the guide roller 332 can be mounted on the support 331 via the guide roller adjustment mechanism 333, such as Figure 8 and Figure 9 As shown. Alternatively, both guide rollers 332 on both sides can be mounted on the support 331 via the guide roller adjustment mechanism 333.

[0069] Multiple mandrel supports 33 are arranged at intervals along the axial direction of the mandrel 31 to achieve multi-point support for the mandrel 31. A mandrel support 33 is provided at both the head and tail ends of the mandrel 31, and at least one mandrel support 33 can be provided between the mandrel supports 33 at both ends, depending on the situation. Figure 2 and Figure 3 The diagram shows three mandrel supports 33 spaced apart along the axial direction of the mandrel 31.

[0070] In some feasible embodiments, the moving mechanism 52 includes a slide rail 521 and a moving trolley 522. The slide rail 521 is arranged parallel to the axial direction of the mandrel 31. To improve the smoothness of the movement of the moving trolley 522, it is preferable that two slide rails 521 are arranged in parallel. The moving trolley 522 includes a trolley platform 5221, wheels 5222 and wheel drive 5223. The corrugated pipe fixing mechanism 51 and the wire feeding part 4 are both disposed on the trolley platform 5221 and arranged along the axial direction of the mandrel 31. The corrugated pipe fixing mechanism 51 is located at the end of the wire feeding part 4 away from the rotary drive 32, so as to ensure that the wire feeding part 4 pre-prepares the wire 2 to be threaded for the corrugated pipe body 1 in the corrugated pipe fixing mechanism 51. Wheels 5222 are mounted on both sides of the bottom of the trolley platform 5221, and the wheels 5222 on both sides are respectively adapted to roll along two slide rails 521. The wheel drive 5223 is fixed below the trolley platform 5221 and is used to drive the wheels 5222 to roll along the slide rails 521, thereby driving the bellows fixing mechanism 51 to move along the axial direction of the core rod 31. Two wheels 5222 are provided on each side of the bottom of the trolley platform 5221 along the slide rails 521, that is, four wheels 5222 are provided on the bottom of the trolley platform 5221, and the wheels 5222 on both sides correspond one-to-one. The corresponding set of wheels 5222 is coaxially connected by a connecting shaft. The wheel drive 5223 includes a motor and a gear meshing assembly. The motor is connected to the connecting shaft through the gear meshing assembly, so as to drive the connecting shaft to rotate through the motor, thereby driving the wheels 5222 to roll along the slide rails 521. Specifically, as Figure 3 As shown, the gear meshing assembly includes a driving gear and a driven gear meshing with the driving gear. The driving gear is coaxially connected to the motor output end, and the driven gear is fixedly mounted on the connecting shaft by means of key connection or other means.

[0071] In use, by controlling the rotation speed of the wheel drive 5223 and the rotation drive 32, the coordinated movement of the mandrel 31 and the bellows body 1 can be achieved.

[0072] In some feasible embodiments, the front end of the mandrel 31 is provided with a fixing structure 312 for fixing the metal wire 2. The fixing structure 312 may be a fixing hole opened on the mandrel 31. The fixing hole is arranged radially along the mandrel 31. When the metal wire 2 is wound onto the mandrel 31 in the initial stage, the end of the metal wire 2 can be fixed through the fixing hole to ensure that the metal wire 2 is spirally wound along the metal wire winding groove 311 under the rotation of the mandrel 31.

[0073] In some feasible implementations, the mandrel 31 includes, but is not limited to, a zinc rod. The wire 2 includes, but is not limited to, steel wire.

[0074] Some feasible implementation methods, such as Figure 2 and Figure 3As shown, the preferred metal wire feeding section 4 employs a feeding mechanism with a wire straightening function. This technology is a mature existing technology, such as the steel wire thread generating device for a corrugated pipe production line disclosed in invention patent CN115488259A, which will not be elaborated here. The metal wire 2 reaches the wire outlet through the metal wire feeding section 4, and after the end of the metal wire 2 is fixed in the fixing hole at the front end of the mandrel 31, it is wound into the metal wire winding groove 311 under the coordinated cooperation of the rotation of the mandrel 31 and the backward movement of the moving trolley (i.e., towards the end of the mandrel 31).

[0075] In some feasible embodiments, the corrugated pipe body 1 is preferably a one-piece molded structure. Specifically, after the main body of the corrugated pipe body 1 is extruded by an extruder, a circular spiral 12 is pressed onto the outer wall of the main body using a corresponding threaded extrusion die. The extrusion of the corrugated pipe body 1 and the forming of the circular spiral 12 both employ techniques known in the art, and will not be described in detail here.

[0076] The following section, in conjunction with the structural configuration of the corrugated pipe threading processing equipment 100, will provide a detailed explanation of the threading process and principle of the corrugated pipe in Example 1.

[0077] When processing begins, the corrugated pipe body 1 produced in the previous process is fixedly clamped in the ring 512, and the end of the wire 2 at the wire outlet of the wire feeding part 4 is fixed in the fixing hole at the front end of the mandrel 31 (generally, the wire 2 is passed through the fixing hole and the end of the wire 2 is bent). At this time, the wire outlet of the wire feeding part 4 is located at the front end of the mandrel 31, while the ring 512 is away from the mandrel 31.

[0078] Then, the rotary drive 32 is activated to drive the mandrel 31 to rotate, so as to pull the metal wire 2 of the metal wire feeding section 4 to wind around the outer periphery of the mandrel 31. At the same time, the wheel drive 5223 of the moving trolley 522 is activated to drive the moving trolley 522 to move synchronously along the mandrel 31 towards the end of the mandrel 31, so as to ensure that the metal wire 2 of the metal wire feeding section 4 is spirally wound along the metal wire winding groove 311 and embedded in the metal wire winding groove 311.

[0079] After the moving trolley 522 moves a certain distance towards the end of the mandrel 31, part of the metal wire 2 has been wound around the front end of the mandrel 31. At this time, the ring 512 reaches the front end of the mandrel 31 and begins to thread through the mandrel 31. Then the mandrel 31 continues to rotate, the moving trolley 522 continues to move, and the metal wire 2 on the mandrel 31 begins to spirally thread along the internal thread groove 11 under the action of the rotation of the mandrel 31. As the moving trolley 522 continues to feed, the metal wire 2 spirally winds along the internal thread groove 11. When the ring 512 travels to the mandrel support 33, the corresponding guide roller 332 can be lowered to prevent affecting the normal operation of the ring 512. After the ring 512 passes the mandrel support 33, the guide roller 332 is immediately raised and fixed to restore the supporting function of the guide roller 332 on the mandrel 31.

[0080] During the wire threading process, the bellows body 1 and the mandrel 31 are in a clearance fit. When the metal wire 2 is in the wire winding groove 311, the wire winding groove 311 only serves as a limiting auxiliary for the metal wire 2. The depth of the wire winding groove 311 is less than or equal to the radius of the metal wire 2, and the groove depth of the internal thread groove 11 is not less than the diameter of the metal wire (generally, the groove depth of the internal thread groove 11 is equal to the diameter of the metal wire). During the rotating wire threading process, the metal wire 2 cannot be completely inserted into the internal thread groove 11. After the wire threading is completed, the metal wire 2 is cut off. Because there is residual stress in the metal wire 2 during the rotating wire threading process, the residual stress will be released after the metal wire 2 is cut off (release process). (The metal wire 2 expands outward, increasing the internal diameter of the spiral wound around the metal wire 2.) Relying on the release of residual stress in the metal wire 2, the metal wire 2, which was not completely inserted into the internal thread groove 11, is fully embedded into the internal thread groove 11. Since the depth of the metal wire winding groove 311 is less than or equal to the radius of the metal wire 2, and the bellows body 1 and the mandrel 31 are in a clearance fit, the metal wire will detach from the metal wire winding groove 311 of the mandrel 31 and be inserted into the internal thread groove 11 of the bellows after the stress is released. At this time, there is no metal wire on the mandrel 31, so the bellows with the wire threaded can be directly pulled out from the mandrel 31 from the wire threading end (i.e., the front end).

[0081] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0082] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A corrugated pipe, characterized in that, include: The corrugated pipe body (1) has an internal threaded groove (11) on its inner wall and an outwardly protruding annular spiral line (12) on its outer wall. A spiral metal wire is wound along the internal thread groove (11) and fitted and fixed inside the internal thread groove (11).

2. The corrugated pipe according to claim 1, characterized in that, The pitch of the internal thread groove (11) is the same as the pitch of the annular helix (12), and the spiral trajectories of the internal thread groove (11) and the annular helix (12) coincide internally and externally.

3. The corrugated pipe according to claim 1 or 2, characterized in that, The spiral metal wire is interference-fitted with the internal thread groove (11).

4. The corrugated pipe according to claim 1 or 2, characterized in that, The spiral metal wire is a spiral steel wire.

5. A corrugated pipe threading processing device, capable of processing the corrugated pipe according to any one of claims 1 to 4, characterized in that, The corrugated pipe wire threading processing equipment includes: The wire winding and shaping part (3) includes a mandrel (31) and a rotation drive (32). The outer wall of the mandrel (31) is provided with a wire winding groove (311) that is adapted to the internal thread groove (11). The rotation drive (32) is connected to the end of the mandrel (31) and is used to drive the mandrel (31) to rotate. The wire feeding section (4) is used to provide the wire (2) to the mandrel (31) during the rotation of the mandrel (31) so that the wire (2) is wound along the wire winding groove (311) and fitted into the wire winding groove (311); The corrugated tube wire threading part (5) includes a corrugated tube fixing mechanism (51) and a moving mechanism (52). The corrugated tube fixing mechanism (51) is located on the outer periphery of the mandrel (31) and is used to install the corrugated tube body (1) so that the corrugated tube body (1) is coaxially fitted outside the mandrel (31). The moving mechanism (52) can drive the corrugated tube fixing mechanism (51) to move along the axial direction of the mandrel (31) during the rotation of the mandrel (31) so that the metal wire (2) wound in the metal wire winding groove (311) is wound along the internal thread groove (11) and fitted and fixed in the internal thread groove (11).

6. The corrugated pipe wire threading equipment according to claim 5, characterized in that, The bellows fixing mechanism (51) includes a connecting arm (511) and a ring (512) arranged coaxially with the mandrel (31). The ring (512) is used to fit onto the outer wall of the bellows body (1), and the inner wall of the ring (512) is provided with a ring spiral groove (5121) that is adapted to the concave and convex shape of the annular spiral (12). The ring (512) is connected to the moving mechanism (52) through the connecting arm (511).

7. The corrugated pipe wire threading processing equipment according to claim 6, characterized in that, The wire winding and shaping section (3) further includes a mandrel support (33) for supporting the mandrel (31), the mandrel support (33) comprising: Support (331) for mounting the mandrel bracket (33); Guide rollers (332) are rotatably mounted on the top of the support (331) and arranged parallel to the axial direction of the mandrel (31); guide rollers (332) are provided on both sides of the top of the support (331), and the mandrel (31) is supported between the two guide rollers (332), and any one of the guide rollers (332) is used to roll with the mandrel (31).

8. The corrugated pipe wire threading processing equipment according to claim 7, characterized in that, The mandrel support (33) further includes a guide roller adjustment mechanism (333), at least one of the guide rollers (332) is mounted on the support (331) via the guide roller adjustment mechanism (333), and the guide roller adjustment mechanism (333) includes: A pair of vertical grooves (3331) are symmetrically opened on the top of the support (331), and pin holes (3332) are provided on both sides of the top of any one of the vertical grooves (3331). A pair of roller bearing seats (3333) are slidably assembled in the two vertical grooves (3331), and each of the two roller bearing seats (3333) has a pin hole two for aligning with the pin hole one (3332) at its far ends; the two ends of the guide roller (332) are movably inserted into the two roller bearing seats (3333) at their close ends; A pin (3334) is used to insert and fix the roller seat (3333) and the vertical slide groove (3331) so that the guide roller (332) rolls with the mandrel (31) in the support position, or to disassemble the roller seat (3333) and the vertical slide groove (3331) so that the guide roller (332) descends along the vertical slide groove (3331) and the ring (512) passes through; Multiple mandrel supports (33) are arranged at intervals along the axial direction of the mandrel (31).

9. The corrugated pipe wire threading processing equipment according to any one of claims 5 to 8, characterized in that, The moving mechanism (52) includes: The slide rail (521) is arranged parallel to the axial direction of the mandrel (31); A mobile trolley (522) includes a trolley platform (5221), wheels (5222), and a wheel drive (5223). The corrugated pipe fixing mechanism (51) and the wire feeding part (4) are both disposed on the trolley platform (5221) and arranged along the axial direction of the mandrel (31). The corrugated pipe fixing mechanism (51) is located at the end of the wire feeding part (4) away from the rotary drive (32). The wheels (5222) are mounted on the bottom of the trolley platform (5221). The wheels (5222) are adapted to roll along the slide rail (521). The wheel drive (5223) is used to drive the wheels (5222) to roll along the slide rail (521) so as to drive the corrugated pipe fixing mechanism (51) to move along the axial direction of the mandrel (31).

10. The corrugated pipe wire threading processing equipment according to any one of claims 5 to 8, characterized in that, The front end of the mandrel (31) is provided with a fixing structure (312) for fixing the metal wire (2).

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