A fully automatic production device for double-wall corrugated pipes

Abstract

The present invention discloses a fully automatic production device for double-wall corrugated pipes, comprising a housing and a screw mounted on the housing, the screw being used to convey and compact raw materials, and further comprising a power mechanism and an elastic mechanism, the power mechanism comprising a drive shaft coaxially arranged with the screw; one end of the elastic mechanism being limited to the drive shaft, and the other end being limited to the screw, the drive shaft driving the screw to rotate via the elastic mechanism. The present invention provides a fully automatic production device for double-wall corrugated pipes, wherein the drive shaft and the screw are coaxially arranged and then connected via an elastic mechanism. When the drive shaft drives the screw to start or accelerate, the elastic mechanism can buffer the transmission force of the drive shaft to extend the time required for the screw to increase to a specified speed, thereby providing a certain passive speed adjustment range, thereby reducing the degree to which adjacent functional segments on the screw pull the raw materials, and minimizing the probability of bubbles appearing in the product.

Description

Technical Field

[0001] The present invention relates to the technical field of corrugated pipe production, and in particular to a fully automatic production device for double-wall corrugated pipes. Background Art

[0002] Double-wall corrugated pipe is a new type of pipe with a corrugated outer wall and a smooth inner wall. The corrugated pipe extruder is the main production equipment in the corrugated pipe extrusion molding process. After the raw materials of the corrugated pipe are put into the hopper, the extrusion molding of the raw materials is achieved through external power transmission and heat transfer of external heating elements, as well as the friction force and melt shear force of the barrel and screw to achieve the transportation, compaction, melting, shear mixing and extrusion molding of the raw materials.

[0003] For example, the patent with the authorization announcement number CN217648905U and the authorization announcement date of October 25, 2022, entitled "Single-screw extruder suitable for double-wall corrugated pipe production line" includes a screw installed inside the barrel. The screw is divided into a feeding section, a plasticizing section, and a discharge section from the feed inlet to the head coupling. A stirring head is provided at the front end of the discharge section. The advantage of this patent is that the segmented design enables faster material transportation, compaction, mixing, and plasticization, and achieves the purpose of drainage and dehydration.

[0004] The screw speed of the extruder is a core parameter that directly affects the output and quality of the product. When the extruder is just started, the screw needs to rotate at a low speed to discharge waste and adjust various parameters. In the existing technology, the screw speed is generally actively controlled. Since the screw has different functional segments, when the screw speed suddenly increases, the adjacent functional segments on the screw will pull the raw material to a certain extent, which will increase the probability of bubbles appearing in the product, thereby affecting the quality of the product. Summary of the Invention

[0005] The purpose of the present invention is to provide a fully automatic production device for double-wall corrugated pipes to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A fully automatic production device for double-wall corrugated pipes, comprising a housing and a screw mounted on the housing, the screw being used to convey and compact raw materials, and further comprising:

[0008] A power mechanism comprising a drive shaft coaxially arranged with the screw;

[0009] An elastic mechanism has one end located on the driving shaft and the other end located on the screw rod. The driving shaft drives the screw rod to rotate through the elastic mechanism.

[0010] The above-mentioned fully automatic production device for double-wall corrugated pipes, the elastic mechanism includes a first limit block fixed on the outer wall of the drive shaft, the screw end is constructed with a movable groove, the inner wall of the movable groove is fixed with a second limit block, and a reset spring is arranged between the first limit block and the second limit block.

[0011] In the above-mentioned fully automatic production device for double-wall corrugated pipes, the power mechanism includes a driving motor fixed to the housing, a driving gear fixed to the output end of the driving motor, and a transmission gear meshing with the driving gear fixed to the driving shaft.

[0012] In the above-mentioned fully automatic production device for double-wall corrugated pipes, a limiting mechanism for limiting the reverse rotation of the screw is provided on the shell.

[0013] The above-mentioned fully automatic production device for double-wall corrugated pipes, the limiting mechanism includes a first driven wheel coaxially arranged with the screw, a second driven wheel rotatably connected to the shell, a circular groove is constructed in the second driven wheel, a ratchet is constructed on the inner wall of the circular groove, a pawl is hinged on the shell, and the pawl is located in the circular groove.

[0014] The above-mentioned fully automatic production device for double-wall corrugated pipes has a connecting ring sleeved on the driving shaft, a limiting rod is fixed on the side of the connecting ring close to the first driven wheel, and a limiting hole adapted to the limiting rod is constructed on the first driven wheel. It also includes a driving mechanism for driving the connecting ring to move axially along the driving shaft.

[0015] The above-mentioned fully automatic production device for double-wall corrugated pipes, the driving mechanism includes a first elastic telescopic rod fixed on the driving shaft, the end of the first elastic telescopic rod is fixed to the connecting ring, and also includes a synchronous wheel coaxially arranged with the driving gear, the synchronous wheel has an inclined groove constructed therein, an inclined rod is slidably connected in the inclined groove, and the end of the inclined rod is in conflict with the connecting ring.

[0016] In the above-mentioned fully automatic production device for double-wall corrugated pipes, the end of the inclined rod is provided with a rolling element.

[0017] In the above-mentioned fully automatic production device for double-wall corrugated pipes, the first driven wheel can slide along the axial direction of the screw.

[0018] In the above-mentioned fully automatic production device for double-wall corrugated pipes, a first elastic telescopic rod is fixed to the end of the screw along its axial direction, and the end of the first elastic telescopic rod is fixed to the first driven wheel.

[0019] In the above technical solution, the present invention provides a fully automatic production device for double-wall corrugated pipes, in which the drive shaft and the screw are coaxially arranged and then connected by an elastic mechanism. When the drive shaft drives the screw to start or accelerate, the elastic mechanism can buffer the transmission force of the drive shaft to extend the time required for the screw to increase to the specified speed, thereby providing a certain passive speed adjustment range, thereby reducing the degree to which the adjacent functional segments on the screw pull the raw materials, and minimizing the probability of bubbles appearing in the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the elastic mechanism structure provided by an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of the structure of a restriction mechanism provided in an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of a connection ring provided in an embodiment of the present invention;

[0025] Figure 5 A cross-sectional view of a synchronous wheel provided in an embodiment of the present invention;

[0026] Figure 6 The embodiment of the present invention provides Figure 5 Enlarged schematic diagram of point A in the middle.

[0027] Description of reference numerals:

[0028] 1. Housing; 2. Screw; 31. Drive shaft; 32. Drive motor; 33. Drive gear; 34. Transmission gear; 41. First limit block; 42. Second limit block; 43. Return spring; 51. First driven wheel; 52. Second driven wheel; 53. Ratchet; 54. Pawl; 61. Connecting ring; 62. Limit rod; 63. Limit hole; 64. First elastic telescopic rod; 71. Synchronous wheel; 72. Bevel groove; 73. Bevel rod; 8. Second elastic telescopic rod. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Reference Figure 1-6 An embodiment of the present invention provides a fully automatic production device for double-wall corrugated pipes, including a shell 1 and a screw 2 installed on the shell 1, the screw 2 is used to convey and extrude raw materials, and also includes a power mechanism and an elastic mechanism. The power mechanism includes a drive shaft 31 coaxially arranged with the screw 2; one end of the elastic mechanism is limited to the drive shaft 31, and the other end is limited to the screw 2, and the drive shaft 31 drives the screw 2 to rotate through the elastic mechanism.

[0031] Specifically, in the process of producing double-wall corrugated pipes, an inner wall extruder and an outer wall extruder need to be set up. The screw 2 is a key component in the extruder to complete the transportation and plasticization of plastic. When it is running, it can make the granular plastic in the extruder achieve the purpose of compaction, gas removal, melting and mixing homogenization. The embodiment of the present invention is an improvement on the extruder part; a feed port and a discharge port are constructed on the shell 1, and the screw 2 is rotatably connected to the shell 1. The granular plastic has a feeding section, a plasticizing section and a discharge section on the rotation stroke of the screw 2. The feed port corresponds to the position of the feeding section, and the discharge port corresponds to the position of the discharge section; the invention of the embodiment of the present invention is to improve the extruder part. The new point is that the drive shaft 31 and the screw 2 are coaxially arranged and then connected by an elastic mechanism (such as a torsionally elastic rubber shaft or a spring). When the drive shaft 31 drives the screw 2 to start or accelerate, the rotational speed of the screw 2 changes greatly. At this time, the transmission force of the drive shaft 31 can be buffered by the elastic mechanism to extend the time required for the screw 2 to increase to the specified speed, thereby providing a certain passive speed adjustment range, and minimizing the pulling of the raw material by the adjacent functional segments on the screw 2 caused by the sudden increase in the speed of the screw 2 when the speed of the screw 2 is actively controlled, thereby minimizing the probability of bubbles appearing in the product.

[0032] In another embodiment provided by the present invention, the elastic mechanism further includes a first limit block 41 fixed to the outer wall of the drive shaft 31, the end of the screw 2 is configured with a movable groove, a second limit block 42 is fixed to the inner wall of the movable groove, and a return spring 43 is provided between the first limit block 41 and the second limit block 42. Specifically, the outer wall of the drive shaft 31 is fixed with a plurality of first limit blocks 41 at equal intervals along its circumference, and the inner wall of the movable groove is fixed with a plurality of second limit blocks 42 at equal intervals along its circumference. The end of the drive shaft 31 is inserted into the movable groove, the plurality of first limit blocks 41 and the plurality of second limit blocks 42 are staggered, and a return spring 43 is provided between adjacent first limit blocks 41 and second limit blocks 42, with the ends of the return spring 43 being fixed to the first limit block 41 and the second limit block 42 respectively; when the drive shaft 31 rotates, the first limit block 41 pulls or squeezes the two adjacent return springs 43, thereby stretching or squeezing the two adjacent second limit blocks 42, thereby driving the screw 2 to rotate. The purpose of such a setting is that when the drive shaft 31 rotates, the transmission force of the drive shaft 31 is transmitted to the screw 2 through the reset spring 43, thereby driving the screw 2 to rotate. When the drive shaft 31 just rotates or accelerates, the transmission force of the drive shaft 31 suddenly increases. At this time, the transmission force of the drive shaft 31 is buffered by the reset spring 43, thereby increasing the time required for the screw 2 to increase to the specified speed, thereby minimizing the probability of bubbles appearing in the product.

[0033] In another embodiment provided by the present invention, the power mechanism further includes a drive motor 32 fixed to the housing 1, a drive gear 33 fixed to the output end of the drive motor 32, and a transmission gear 34 meshing with the drive gear 33 fixed to the drive shaft 31. Specifically, the number of teeth on the drive gear 33 is smaller than the number of teeth on the transmission gear 34, that is, the transmission ratio between the drive gear 33 and the transmission gear 34 is relatively large. When the drive gear 33 drives the transmission gear 34 to rotate, the speed of the transmission gear 34 can be reduced and its torque can be increased to adapt to the application of the screw 2 in the extruder.

[0034] Furthermore, the shell 1 is provided with a limiting mechanism for limiting the reverse rotation of the screw 2, such as directly providing a ratchet mechanism on the screw 2, so that the screw 2 is restricted when rotating in the reverse direction. This is the prior art and will not be elaborated on. When the drive shaft 31 drives the screw 2 to rotate forward, the operation of the screw 2 can enable the plastic in the shell 1 to achieve the purpose of compaction, exhaust, melting and homogenization. Since an elastic mechanism is provided between the drive shaft 31 and the screw 2, when the speed of the drive shaft 31 changes (mainly when the speed of the drive shaft 31 decreases), the elastic force of the reset spring 43 may force the screw 2 to reverse slightly. This phenomenon can be avoided as much as possible through the limiting mechanism, and it is avoided as much as possible to pull the raw material and generate a large number of bubbles when the screw 2 reverses.

[0035] Preferably, the limiting mechanism includes a first driven wheel 51 coaxially arranged with the screw 2, a second driven wheel 52 is rotatably connected to the housing 1, a circular groove is constructed in the second driven wheel 52, a ratchet 53 is constructed on the inner wall of the circular groove, a pawl 54 is hinged on the housing 1, and the pawl 54 is located in the circular groove. Specifically, the first driven wheel 51 is annular in structure as a whole, and is arranged at the end of the screw 2. The first driven wheel 51 is sleeved on the drive shaft 31 and the two are not in contact (the first driven wheel 51 and the screw 2 can be fixedly connected so that the first driven wheel 51 and the screw 2 keep rotating synchronously); friction transmission or meshing transmission (friction transmission in the accompanying drawings) can be adopted between the first driven wheel 51 and the second driven wheel 52, and the diameter of the second driven wheel 52 is smaller than the diameter of the first driven wheel 51. When the first driven wheel 51 rotates forward and drives the second driven wheel 51 to rotate, the second driven wheel 52 rotates forward and drives the second driven wheel 51 to rotate forward. When the driven wheel 52 is reversed, the speed of the second driven wheel 52 is greater than the speed of the first driven wheel 51; a torsion spring is provided at the hinge point between the pawl 54 and the housing 1, thereby forcing the pawl 54 to move closer to the ratchet wheel 53 through the torsion spring; when the screw 2 rotates forward, the first driven wheel 51 rotates forward, thereby driving the second driven wheel 52 to rotate in the opposite direction, and when the second driven wheel 52 rotates in the opposite direction, the ratchet wheel 53 on the inner wall of the circular groove forces the pawl 54 to rotate in an offset manner (the teeth of the pawl 54 and the ratchet wheel 53 are inclined in the same direction, and the ratchet wheel 53 is inclined in the opposite direction). When the second driven wheel 52 rotates, the multiple teeth of the ratchet 53 can repeatedly force the pawl 54 to rotate around its hinge point), that is, the pawl 54 will not affect the reverse reaction of the ratchet 53 and the second driven wheel 52. When the second driven wheel 52 rotates forward, the teeth of the pawl 54 will directly engage with the corresponding teeth of the ratchet 53, thereby limiting the forward rotation of the ratchet 53 and the second driven wheel 52 through the pawl 54. The advantage of such an arrangement is that by setting the ratchet 53 and the pawl 54, the reverse rotation of the second driven wheel 52 is not affected. While rotating in the forward direction, the second driven wheel 52 can be restricted from rotating in the forward direction. Since the first driven wheel 51 and the second driven wheel 52 are connected in transmission, the reverse rotation of the first driven wheel 51 and the screw 2 is restricted, and the screw 2 is prevented from reversing under the action of the reset spring 43 as much as possible, thereby minimizing the probability of bubbles appearing in the product. Since the rotation speed of the second driven wheel 52 is greater than that of the first driven wheel 51, directly arranging the ratchet 53 and the pawl 54 in the second driven wheel 52 can improve the sensitivity of reverse braking.

[0036] Furthermore, a connecting ring 61 is sleeved on the driving shaft 31, and a limiting rod 62 is fixed to the side of the connecting ring 61 close to the first driven wheel 51. The first driven wheel 51 is constructed with a limiting hole 63 adapted to the limiting rod 62, and also includes a driving mechanism for driving the connecting ring 61 to move axially along the driving shaft 31. Specifically, a plurality of limiting holes 63 are constructed on the first driven wheel 51, and a plurality of limiting rods 62 adapted to the limiting holes 63 are fixed on the connecting ring 61. The connecting ring 61 rotates synchronously with the drive shaft 31, and when the drive shaft 31 rotates, the driving mechanism (such as a combination of a spline structure and an electric telescopic rod or a spline structure and a hydraulic rod, with adapted splines and keyways respectively constructed on the inner wall of the connecting ring 61 and the outer wall of the drive shaft 31, one end of the electric telescopic rod is fixed on the drive shaft 31, and the other end is fixed on the connecting ring 61, so that the connecting ring 61 and the drive shaft 31 can be driven to move axially along the drive shaft 31 on the basis of synchronous rotation by the electric telescopic rod) can drive the connecting ring 61 to move closer to or away from the first driven wheel 51 along the axial direction of the drive shaft 31. When the connecting ring 61 moves toward the first driven wheel 5 1 one side approaches, multiple limit rods 62 will be inserted into the corresponding limit holes 63, thereby limiting the relative rotation of the drive shaft 31 and the screw 2, and at the same time limiting the operation of the elastic mechanism. The effect of such a setting is that when the extruder is just started or running at a low speed, the rotation speed of the screw 2 is relatively low, and the elastic mechanism is required to buffer the transmission force of the drive shaft 31. After the extruder runs stably (after the rotation speed of the screw 2 is increased from low speed to normal operating speed), the rotation speed of the screw 2 remains basically unchanged (only the rotation speed of the screw 2 needs to be slightly controlled according to the temperature). At this time, the elastic mechanism basically loses its function, and the limit rods 62 on the connecting ring 61 are driven by the driving mechanism to be inserted into the corresponding limit holes 63, thereby limiting the operation of the elastic mechanism to limit the relative rotation of the drive shaft 31 and the screw 2, and then driving the screw 2 to rotate stably through the drive shaft 31.

[0037] Preferably, the driving mechanism includes a first elastic telescopic rod 64 fixed on the driving shaft 31, the end of the first elastic telescopic rod 64 is fixed to the connecting ring 61, and also includes a synchronous wheel 71 coaxially arranged with the driving gear 33, and a bevel groove 72 is constructed in the synchronous wheel 71, and a bevel rod 73 is slidably connected in the bevel groove 72, and the end of the bevel rod 73 is in contact with the connecting ring 61; the end of the bevel rod 73 is provided with a rolling element, which can be a roller or a ball, which can reduce the friction between the bevel rod 73 and the connecting ring 61. Specifically, the first elastic telescopic rod 64 is arranged along the axial direction of the drive shaft 31, which can limit the relative rotation of the connecting ring 61 and the drive shaft 31, and can force the connecting ring 61 to move along the axial direction of the drive shaft 31 to the side away from the first driven wheel 51; the synchronous wheel 71 and the driving gear 33 are both fixed to the output end of the driving motor 32, and the synchronous wheel 71 is located on the side of the driving gear 33 away from the driving motor 32, and the synchronous wheel 71 and the driving gear 33 rotate synchronously; the inclined groove 72 is arranged along the radial direction of the synchronous wheel 71, and the side of the inclined groove 72 close to the driving gear 33 is closer to the central axis of the synchronous wheel 71, and the inclined groove 72 The side away from the driving gear 33 is farther away from the central axis of the synchronous wheel 71; the side of the inclined groove 72 away from the driving gear 33 is also constructed with an opening connected to the outside world, and the inclined rod 73 is arranged as a whole in the opening, which has an inclined portion adapted to the inclined groove 72, so that the inclined rod 73 can move in the opening while sliding along the inclined groove 72 through the inclined portion. When the inclined rod 73 moves along the inclined groove 72 to the side close to the central axis of the synchronous wheel 71, the inclined rod 73 is completely retracted into the opening, and when the inclined rod 73 moves along the inclined groove 72 to the side away from the central axis of the synchronous wheel 71, the inclined rod 73 extends from the opening; the effect of such a setting is Because, when the extruder starts to run at a low speed, the rotation speed of the driving gear 33 and the synchronous wheel 71 is low. At this time, the inclined rod 73 moves along the inclined groove 72 under the action of gravity, and because the connecting ring 61 is located on the side of the synchronous wheel 71 away from the driving gear 33, the inclined rod cannot be extended from the opening without other forces, that is, the position of the connecting ring does not change; after the extruder switches from low speed to high speed stable operation, the rotation speed of the driving gear 33 and the synchronous wheel 71 gradually increases to a certain speed (at this speed, the extruder runs stably). At this speed, the inclined rod 73 in the synchronous wheel 71 moves along the inclined groove 72 under the action of centrifugal force. The groove 72 moves toward the side away from the central axis of the synchronous wheel 71, and at the same time, the inclined rod 73 extends from the opening under the action of centrifugal force and squeezes the connecting ring 61 (the inclined rod 73 squeezes the connecting ring 61 and slides relative to the connecting ring 61, and the friction between the inclined rod 73 and the connecting ring 61 can be reduced by the rolling element), so that the connecting ring 61 stretches the first elastic telescopic rod 64 and approaches the side close to the first driven wheel 51, so that multiple limit rods 62 are inserted into the corresponding limit holes 63, thereby limiting the relative rotation of the drive shaft 31 and the screw 2, so as to drive the screw 2 to rotate stably through the drive shaft 31.

[0038] It should be noted that when the driving gear 33 increases to a certain speed, the driving shaft 31 also maintains a stable operating speed. At this speed, the driving shaft 31 drives the screw 2 to rotate stably through the elastic mechanism. In this state, the relative positions of the two will be offset compared with the relative positions of the two in the static state. Correspondingly, the positions of the limit rod 62 and the limit hole 63 in the static state also have a certain offset. After the driving shaft 31 drives the screw 2 to rotate stably, the positions of the limit rod 62 and the limit hole 63 correspond to each other, so that when the connecting ring 61 moves, multiple limit rods 62 are driven to insert into the corresponding limit holes 63.

[0039] In another embodiment provided by the present invention, further, the first driven wheel 51 can slide along the axial direction of the screw 2 (such as a spline structure arranged along the axial direction of the screw 2, so as to limit the rotation of the first driven wheel 51 relative to the screw 2 while allowing the first driven wheel 51 to move along the axial direction of the screw 2). Specifically, the first driven wheel 51 slides along the axial direction of the screw 2 without affecting the synchronous rotation of the first driven wheel 51 and the screw 2, and the first driven wheel 51 is sleeved on the drive shaft 31, and its axial movement along the screw 2 will not affect the operation of the drive shaft 31; when the first driven wheel 51 is on the side away from the screw 2, the first driven wheel 51 and the second driven wheel 52 maintain mechanical transmission, and when the first driven wheel 51 is on the side close to the screw 2, the first driven wheel 51 and the second driven wheel 52 are disengaged from mechanical transmission; the effect of such a setting is that when the drive shaft 31 drives the screw 2 to start or run at a low speed, the first driven wheel 51 is On the side away from the screw 2, the ratchet 53 and pawl 54 structure in the second driven wheel 52 can avoid the screw 2 from reversing as much as possible. When the drive shaft 31 drives the screw 2 to run stably, the limit rod 62 is inserted into the corresponding limit hole 63 and limits the operation of the elastic mechanism. At this time, the screw 2 rotates stably with the drive shaft 31, and the limiting mechanism loses its effect. At this time, the first driven wheel can be moved to the side close to the screw 2, so that the second driven wheel 52 and the ratchet 53 and pawl 54 structure lose their effect, which can save a certain amount of kinetic energy (when the screw 2 rotates forward, the ratchet 53 and the pawl 54 rub against each other, which will cause a certain amount of kinetic energy to be wasted).

[0040] Preferably, a second elastic telescopic rod 8 is fixed to the end of the screw rod 2 along its axial direction, and the end of the second elastic telescopic rod 8 is fixed to the first driven wheel 51. Specifically, the second elastic telescopic rod 8 is arranged along the axial direction of the screw rod 2, which can limit the relative rotation between the first driven wheel 51 and the screw rod 2, and can force the first driven wheel 51 to move along the axial direction of the screw rod 2 toward the side away from the screw rod 2. The advantage of such a setting is that when the speed of the driving gear 33 increases to a certain speed, the inclined rod 73 extends from the inclined groove 72 and squeezes the connecting ring 61, so that the multiple limit rods 62 on the connecting ring 61 are inserted into the corresponding limit holes 63, thereby limiting the relative rotation of the drive shaft 31 and the screw 2; in this embodiment, the first driven wheel 51 can move along the axial direction of the screw 2, which makes the limit rod 62 squeeze the first driven wheel 51 after being inserted into the corresponding limit hole 63, thereby forcing the first driven wheel 51 to move to the side close to the screw 2, that is, when the drive shaft 31 drives the screw 2 to run stably, the connecting ring 61 and the first driven wheel 51 can be driven axially by the inclined rod 73, so as to release the mechanical transmission of the first driven wheel 51 and the second driven wheel 52 while limiting the relative rotation of the drive shaft 31 and the screw 2.

[0041] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A fully automatic production device for double-wall corrugated pipes, comprising a housing and a screw mounted on the housing, the screw being used to convey and extrude raw materials, characterized in that: Also includes: A power mechanism comprising a drive shaft coaxially arranged with the screw; An elastic mechanism, one end of which is located on the driving shaft and the other end of which is located on the screw, and the driving shaft drives the screw to rotate through the elastic mechanism; The housing is provided with a limiting mechanism for limiting the reverse rotation of the screw; The limiting mechanism includes a first driven wheel coaxially arranged with the screw, a second driven wheel rotatably connected to the housing, a circular groove configured in the second driven wheel, a ratchet configured on the inner wall of the circular groove, and a pawl hinged on the housing, the pawl being located in the circular groove; The driving shaft is provided with a connecting ring, a limiting rod is fixed to the side of the connecting ring close to the first driven wheel, the first driven wheel is provided with a limiting hole adapted to the limiting rod, and further includes a driving mechanism for driving the connecting ring to move axially along the driving shaft; The driving mechanism includes a first elastic telescopic rod fixed on the driving shaft, the end of the first elastic telescopic rod is fixed to the connecting ring, and also includes a synchronous wheel coaxially arranged with the driving gear, an inclined groove is constructed in the synchronous wheel, an inclined rod is slidably connected in the inclined groove, and the end of the inclined rod is in contact with the connecting ring.

2. The fully automatic production device for double-wall corrugated pipes according to claim 1, characterized in that: The elastic mechanism includes a first limit block fixed on the outer wall of the drive shaft, the end of the screw is configured with a movable groove, a second limit block is fixed on the inner wall of the movable groove, and a return spring is provided between the first limit block and the second limit block.

3. The fully automatic production device for double-wall corrugated pipes according to claim 1, characterized in that: The power mechanism includes a driving motor fixed on the housing, a driving gear fixed to the output end of the driving motor, and a transmission gear meshing with the driving gear fixed to the driving shaft.

4. The fully automatic production device for double-wall corrugated pipes according to claim 1, characterized in that: The end of the oblique rod is provided with a rolling element.

5. The fully automatic production device for double-wall corrugated pipes according to claim 1, characterized in that: The first driven wheel can slide along the axial direction of the screw.

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