Flaring expanding and flattening equipment for double-wall corrugated pipe

Abstract

The invention discloses double-wall corrugated pipe flaring expanding and flattening equipment, and relates to the technical field of pipe machining, the double-wall corrugated pipe flaring expanding and flattening equipment comprises a supporting mechanism, the supporting mechanism comprises a fixed die, a movable die is arranged on the right side of the fixed die, an expanding mechanism is arranged in the movable die, and a flattening mechanism is arranged in the fixed die; the expansion mechanism comprises a disc which is used for assisting the double-wall corrugated pipe to finish port expansion through rotation, the disc is arranged in the middle of the fixed mold, and the expansion mechanism is used for uniformly expanding a flaring of the corrugated pipe towards the outer side while the double-wall corrugated pipe enters the fixed mold; according to the device, the flaring of the corrugated pipe placed in the expansion equipment can be gradually expanded, the corrugated pipe can be prevented from being damaged by sudden change of the caliber of the stepped expansion equipment, the situation that large stress is formed in the pipeline due to sudden change of the size is avoided, and then deformation and fracture of the corrugated pipe caused by excitation are prevented; the reliability of the pipeline is effectively improved, the service life of the pipeline is effectively prolonged, and in addition, the situation that expansion is uneven when the caliber changes can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe processing, and specifically provides a double-wall corrugated pipe flaring, expanding and flattening device. Background Art

[0002] The double-wall corrugated pipe is a hollow-wall winding structure drainage pipe mainly made of high-density polyethylene (HDPE), which has excellent chemical stability, aging resistance and environmental stress cracking resistance. There is a hollow structure between the inner and outer walls of the double-wall corrugated pipe, and it is made by an extrusion molding process, having the characteristics of light weight, high pressure resistance, good toughness, fast construction and long service life.

[0003] However, the existing corrugated pipe flattening devices still have the following defects:

[0004] First of all, when the existing corrugated pipes are flared and expanded, the corrugated pipes are clamped and moved close to the expansion device. The flaring device is a stepped expansion. First, the corrugated pipes are allowed to enter the small-diameter device and then move into the large-diameter device for expansion as they move. However, during the transition of the corrugated pipe from a small diameter to a large diameter, due to the sudden change in size, a large stress concentration will be formed inside the corrugated pipe. This stress concentration will cause cracks, deformation or even fracture of the corrugated pipe, reducing the reliability and service life of the corrugated pipe. In addition, the stepped expansion method may cause uneven deformation of the corrugated pipe. When the corrugated pipe passes through the small-diameter device, uneven deformation will occur under the restriction of the small-diameter device, thus affecting the shape and performance of the corrugated pipe.

[0005] Secondly, after the existing corrugated pipes are flared and expanded, there will be many uneven wrinkles at the expanded places. The internal wrinkles of the corrugated pipes will increase the resistance of fluid flow. Especially when used as a pipe or conduit, it will reduce the efficiency of the system. At the same time, if the corrugated pipe is used for a sealing application, the wrinkles will also affect its contact sealing performance with the seal, resulting in leakage or other sealing problems. In addition, untimely flattening will make the corrugated pipe gradually harden, making the rolling and flattening operation more difficult because the hardened material is not easy to deform. Summary of the Invention

[0006] (1) Technical Problems to be Solved

[0007] In view of the above-mentioned disadvantages of the existing technology, the present invention provides a double-wall corrugated pipe flaring, expanding and flattening device, which can effectively solve the problem of corrugated pipe flattening in the existing technology.

[0008] (2) Technical Solutions

[0009] To achieve the above purposes, the present invention is realized through the following technical solutions:

[0010] The present invention discloses a double-wall corrugated pipe flaring, expanding and flattening device, which includes a support mechanism. The support mechanism includes a fixed mold. A moving mold is arranged on the right side of the fixed mold. An expanding mechanism is arranged inside the moving mold, and a flattening mechanism is arranged inside the fixed mold.

[0011] The expanding mechanism includes a disc that rotates to assist in expanding the port of the double-wall corrugated pipe. The disc is arranged in the middle of the fixed mold. The expanding mechanism is used to uniformly expand the corrugated pipe flaring outward while the double-wall corrugated pipe enters.

[0012] The flattening mechanism includes an inner cylinder that makes the port of the corrugated pipe gradually flat and traceless through reciprocating rotation. The outer cylinder (straight groove) is arranged at the top of the fixed mold. The flattening mechanism is used to simultaneously complete the rolling and smoothing operation on the flaring of the expanded double-wall corrugated pipe.

[0013] Furthermore, the fixed mold and the moving mold are of the same size. A platform is fixedly connected inside the moving mold. A corrugated pipe main body is fixedly connected above the platform. The inner diameter of the corrugated pipe main body is adapted to the moving mold. A motor is fixedly connected to the middle of the fixed mold.

[0014] Furthermore, the expanding mechanism includes a support rod. The support rod is fixedly connected to the left side of the moving mold. The support rod is fixedly connected with a fixed ring. A first gear ring is rotatably connected to the front end of the fixed ring. A spiral ring is fixedly connected inside the first gear ring. One end of the first gear ring close to the center of the moving mold is meshed with a second gear ring.

[0015] Furthermore, the middle of the second gear ring is fixedly connected with the disc. An arc groove is rotatably connected to the disc close to the flattening mechanism. The bottom end of the arc groove is fixedly connected with the moving mold. The disc is also rotatably connected with the spiral ring.

[0016] Furthermore, six arc grooves are evenly arranged on the surface of the disc. Expansion rods are slidably connected to the inner sides of the six arc grooves. One ends of the six expansion rods far from the middle of the fixed mold are fixedly connected with spreading plates. The diameter of the spreading plates is adapted to the corrugated pipe main body.

[0017] Furthermore, the flattening mechanism includes a third gear ring. The third gear ring is located inside the moving mold and is fixedly connected with the moving mold. A gear is meshed inside the third gear ring. One side of the gear far from the moving mold is rotatably connected with a telescopic rod. One end of the telescopic rod far from the gear is fixedly connected with the output shaft of the motor.

[0018] Furthermore, a cross frame fixedly connected with the fixed mold is rotatably connected to one side of the telescopic rod close to the expanding mechanism. The cross frame passes through the telescopic rod and is rotatably connected with the output shaft of the motor. A worm is fixedly connected to one end of the cross frame far from the center of the moving mold. The height of the worm is the same as that of the first gear ring.

[0019] Furthermore, an outer cylinder is rotatably connected to one side of the gear close to the moving mold. A straight notch is formed on one side of the outer cylinder facing the bellows main body. The gear also passes through the side surface of the outer cylinder and is fixedly connected to the inner cylinder. The inner cylinder is rotatably connected to the inside of the outer cylinder, and cross-shaped slideways are formed on the surface of the inner cylinder.

[0020] Furthermore, a slider is slidably connected to the inside of the cross-shaped slideway. One side of the slider away from the cross-shaped slideway passes through the outer cylinder and is fixedly connected to a grinding wheel. Four grinding wheels are provided and are all located outside the bellows main body.

[0021] (III) Beneficial effects

[0022] Adopting the technical solution provided by the present invention, compared with the known prior art, it has the following beneficial effects.

[0023] 1. By providing a spiral ring, a second gear ring and a spreading plate, as the spiral ring and the first gear ring move with the moving mold approaching the fixed mold, the meshing connection of the worm is gradually completed. Since the worm is fixed, the spiral ring rotates. The second gear ring on the meshing side of the spiral ring and the first gear ring rotates. The second gear ring drives the disc and the arc groove to rotate. The inner cylinder slidably connected to the arc groove expands outward when the arc groove rotates. At the same time, the spreading plate fixedly connected to the top completes the spreading and expansion of the bellows main body on the outer side for one week, so that the inner diameter of the bellows main body becomes larger and expands. This device can gradually expand the flared part of the bellows placed in the expansion device, prevent the sudden change of the diameter of the stepped expansion device from damaging the bellows, avoid the formation of large stress inside the pipeline due to the sudden change of size, and further prevent the deformation and fracture of the bellows caused by excitation, effectively extending the reliability and service life of the pipeline. In addition, it can also avoid the uneven expansion during the diameter change and protect the shape and performance of the pipeline.

[0024] 2. By providing a third gear ring, an inner cylinder and an outer cylinder, the motor drives the telescopic rod to rotate, and the gear fixedly connected to the top of the telescopic rod also makes a revolution. At the same time, the gear is also meshed with the third gear ring. The diameter of the third gear ring is the same as that of the fixed mold and is fixedly connected to the fixed mold. When the gear rotates inside the third gear ring, it drives the inner cylinder to rotate. The cross-shaped slideways on the surface of the inner cylinder rotate together. The slider and the grinding wheel slidably connected to the inside of the cross-shaped slideway move horizontally left and right under the limiting action of the outer cylinder on the outside and closely move horizontally against the flared part of the bellows main body, realizing the flattening operation of the bellows main body. This device can perform the rolling and flattening operation at the mouth of the bellows while completing the expansion, prevent the increase of fluid flow resistance due to the unevenness of the flared part, effectively improve the efficiency when used as a pipeline, and at the same time can avoid the poor sealing performance caused by the unevenness of the flared part, prevent leakage and other sealing problems. In addition, the immediate rolling and flattening of this device can complete the operation before the flared part hardens, avoiding the difficulty of flattening caused by the hardening of the material due to time delay. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0026] Figure 1 It is a front perspective structural diagram of the present invention;

[0027] Figure 2 It is a front cross-sectional three-dimensional structural diagram of the present invention;

[0028] Figure 3 It is a three-dimensional structural diagram of the expansion mechanism and the flattening mechanism in the present invention;

[0029] Figure 4 This is a cross-sectional three-dimensional structural diagram of the fixed mold in the present invention;

[0030] Figure 5 It is a cross-sectional three-dimensional structural diagram of the movable mold in the present invention;

[0031] Figure 6 A three-dimensional structural diagram of the expansion mechanism of the present invention;

[0032] Figure 7 It is a three-dimensional structural diagram of the gear and outer cylinder in the present invention;

[0033] Figure 8 This is an exploded view of the outer cylinder of the present invention;

[0034] Figure 9 1. It is an exploded view of the ring gear 1, the worm ring and the worm in the present invention;

[0035] Figure 10 It is a front cross-sectional view of the outer cylinder and the grinding wheel in the present invention.

[0036] The reference numerals in the figure represent, respectively, 100, support mechanism; 101, fixed mold; 102, movable mold; 103, platform; 104, bellows body; 105, motor;

[0037] 200, expansion mechanism; 201, support rod; 202, fixing ring; 203, gear ring 1; 204, volute ring; 205, gear ring 2; 206, disc; 207, arc groove; 208, expansion rod; 209, expansion plate;

[0038] 300, Flattening mechanism; 301, Third gear ring; 302, Gear; 303, Telescopic rod; 304, Cross frame; 305, Worm; 306, Outer cylinder; 307, Straight notch; 308, Inner cylinder; 309, Cross slideway; 310, Slide block; 311, Flattening wheel. Detailed implementation manners

[0039] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0040] The present invention will be further described below with reference to the embodiments.

[0041] A double-wall corrugated pipe flaring and expanding and flattening device according to an embodiment of the present invention is as Figure 1 - Figure 9 shown, and includes a support mechanism 100. The support mechanism 100 includes a fixed mold 101. A moving mold 102 is arranged on the right side of the fixed mold 101. An expanding mechanism 200 is arranged inside the moving mold 102, and a flattening mechanism 300 is arranged inside the fixed mold 101;

[0042] The expanding mechanism 200 includes a disk 206 that rotates to assist in expanding the port of the double-wall corrugated pipe. The disk 206 is arranged in the middle of the fixed mold 101. The expanding mechanism 200 is used to uniformly expand the corrugated pipe flaring outward while the double-wall corrugated pipe enters.

[0043] As a preferred implementation manner in this embodiment, as Figure 1 - Figure 9 shown, the fixed mold 101 and the moving mold 102 are of the same size. A platform 103 is fixedly connected inside the moving mold 102. A corrugated pipe main body 104 is fixedly connected above the platform 103. The inner diameter of the corrugated pipe main body 104 is adapted to the moving mold 102. A motor 105 is fixedly connected in the middle of the fixed mold 101.

[0044] As a preferred implementation manner in this embodiment, as Figure 1 - Figure 9 shown, the expanding mechanism 200 includes a support rod 201. The support rod 201 is fixedly connected to the left side of the moving mold 102. The support rod 201 is fixedly connected with a fixed ring 202. The front end of the fixed ring 202 is rotatably connected with a first gear ring 203. An annular worm 204 is fixedly connected inside the first gear ring 203. One end of the first gear ring 203 close to the center of the moving mold 102 is meshed with a second gear ring 205.

[0045] In this embodiment, as Figure 1 - Figure 9 shown, the middle part of the second gear ring 205 is fixedly connected to the disk 206. An arc groove 207 is rotatably connected to the disk 206 near the flattening mechanism 300. The bottom end of the arc groove 207 is fixedly connected to the moving die 102. The disk 206 is also rotatably connected to the spiral ring 204.

[0046] In this embodiment, as Figure 1 - Figure 9 shown, six arc grooves 207 are evenly formed on the surface of the disk 206. Expansion rods 208 are slidably connected to the inner sides of the six arc grooves 207. Support plates 209 are fixedly connected to one ends of the six expansion rods 208 away from the middle part of the fixed die 101. The diameter of the support plate 209 is adapted to the main body 104 of the corrugated pipe.

[0047] Compared with the prior art, the device can gradually expand the flared part of the corrugated pipe placed in the expansion device, prevent damage to the corrugated pipe caused by the sudden change of the diameter of the stepped expansion device, avoid the formation of large stress inside the pipe due to the sudden change of size, and further prevent the deformation and fracture of the corrugated pipe caused by excitation, effectively extending the reliability and service life of the pipe. In addition, it can also avoid uneven expansion during the diameter change and protect the shape and performance of the pipe.

[0048] On other levels, this embodiment also provides a flattening structure. As Figure 1 - Figure 9 shown, the flattening mechanism 300 includes an inner cylinder 308 that gradually flattens and makes the port of the corrugated pipe seamless through reciprocating rotation. The outer cylinder 306 is arranged at the top of the fixed die 101. The flattening mechanism 300 is used to simultaneously complete the rolling and smoothing operation on the flared part of the double-wall corrugated pipe being expanded.

[0049] As a preferred implementation manner in this embodiment, as Figure 1 - Figure 9 shown, the flattening mechanism 300 includes a third gear ring 301. The third gear ring 301 is located inside the moving die 102 and is fixedly connected to the moving die 102. A gear 302 is meshed with the inner side of the third gear ring 301. A telescopic rod 303 is rotatably connected to one side of the gear 302 away from the moving die 102. One end of the telescopic rod 303 away from the gear 302 is fixedly connected to the output shaft of the motor 105.

[0050] In this embodiment, as Figure 1 - Figure 9As shown in the figure, on one side of the telescopic rod 303 close to the expansion mechanism 200, there is a cross frame 304 rotatably connected, which is fixedly connected to the fixed mold 101. The cross frame 304 passes through the telescopic rod 303 and is rotatably connected to the output shaft of the motor 105. One end of the cross frame 304 away from the center of the moving mold 102 is fixedly connected with a worm 305, and the height of the worm 305 is consistent with that of the first gear ring 203.

[0051] In this embodiment, as Figure 1 - Figure 9 As shown in the figure, on one side of the gear 302 close to the moving mold 102, there is an outer cylinder 306 rotatably connected. On one side of the outer cylinder 306 facing the bellows main body 104, there is a straight notch 307. The gear 302 also passes through the side of the outer cylinder 306 and is fixedly connected with an inner cylinder 308. The inner cylinder 308 is rotatably connected inside the outer cylinder 306, and the surface of the inner cylinder 308 is provided with a cross slideway 309.

[0052] In this embodiment, as Figure 1 - Figure 9 As shown in the figure, a slider 310 is slidably connected inside the cross slideway 309. One side of the slider 310 away from the cross slideway 309 passes through the outer cylinder 306 and is fixedly connected with a roller 311. There are four rollers 311 and they are all located outside the bellows main body 104.

[0053] Compared with the prior art, this device can perform the rolling and flattening operation at the mouth of the bellows while the bellows is being expanded, which can prevent the increase of fluid flow resistance due to unevenness at the flared mouth. When used as a pipeline, it can effectively improve the efficiency. At the same time, it can avoid the poor sealing performance caused by unevenness at the flared mouth, prevent leakage and other sealing problems. In addition, the immediate rolling and flattening of this device can complete the operation before the flared mouth hardens, avoiding the situation that it is difficult to flatten due to the hardening of the material caused by time delay.

[0054] The following is the specific working principle of the above embodiment:

[0055] The double-wall bellows flaring, expanding and flattening equipment generally refers to the auxiliary equipment for producing double-wall bellows, which can expand and flatten the flared part of the bellows during the manufacturing process of the bellows to meet specific engineering requirements.

[0056] First, the bellows body 104 is placed on the platform 103 inside the movable mold 102. The platform 103 provides suitable support for the movement of the bellows body 104. The platform 103 is fixedly connected to the movable mold 102, allowing the platform 103 and the bellows body 104 to move together with the movable mold 102. The operator uses an external force to move the movable mold 102 away from the fixed mold 101 and towards the fixed mold 101. During this process, the fixed mold 101 remains stationary. A worm 305 is provided in the fixed mold 101, and a ring gear 203 is provided in the movable mold 102, and a worm ring 204 is fixedly connected to the inside of the ring gear 203. In order to ensure that the bellows body 104 can be expanded smoothly, it is necessary to ensure that the worm 305 and the worm ring 204 are at the same height, so that the movable mold 102 can continue to approach the fixed mold 101, and the ring gear 203 and the worm ring 204 inside the movable mold 102 can be fully connected to the worm 305. The side of the gear ring 203 close to the fixed mold 101 is rotatably connected to the fixed ring 202, and the other end of the fixed ring 202 is rotatably connected to the support rod 201. The support rod 201 provides support for the entire expansion mechanism 200. After the movable mold 102 moves to contact and mesh with the worm 305, since the worm 305 is fixedly connected to the cross frame 304, and the cross frame 304 is fixedly connected to the fixed mold 101, the position of the cross frame 304 will not change during the entire process, so the worm 305 connected thereto will not move in position and posture, so the worm 305 does not rotate. Because the worm 305 and the worm ring 204 are meshed when they approach and contact each other, the worm 305 on one side does not move, and the worm ring 204 on the other side still follows the movable mold 102 to move in the direction close to the worm 305. When the two are engaged, the worm ring 204 will rotate under the action of the fixed worm 305, and the gear ring 1 203 fixedly connected to the outside of the worm ring 204 will also rotate synchronously. The gear ring 2 205 is engaged with the side of the gear ring 1 203 near the middle of the movable mold 102. The gear ring 1 203 engages with the gear ring 2 205 and rotates. A disk 206 is fixedly connected to the inside of the gear ring 2 205. Six arc grooves 207 are evenly opened on the surface of the disk 206. An expansion rod 208 is slidably connected to the inside of the arc groove 207. The top of the expansion rod 208 is fixedly connected to the expansion rod 208. When the disk 206 and the arc groove 207 rotate, since the expansion rod 208 is slidably connected to the support rod 201, the expansion rod 208 will not move in other directions, but will only expand or contract along the direction of the straight line where it is located.Driven by the meshing of the first gear ring 203, the expansion rod 208 and the spreading plates 209 slide outward. The six spreading plates 209 together form an expansion device located inside the bellows main body 104. At the same time, they are continuously moving towards the side wall of the bellows main body 104 and gradually contacting and fitting onto the bellows main body 104. As the expansion rod 208 slides, the spreading plates 209 begin to contact the outer bellows main body 104, and the expansion rod 208 continues to slide in the arc groove 207. Then, the spreading plates 209 slowly and evenly expand the flared opening of the bellows main body 104 until the expansion rod 208 rises to the outermost side of the arc groove 207. At this time, the expansion of the flared opening of the bellows main body 104 has reached the maximum. During this process, the movement and flared opening expansion of the bellows main body 104 are carried out simultaneously. Before the fixed mold 101 touches the moving mold 102, the worm 305 has meshed with the worm ring 204. After meshing, the first gear ring 203 drives the second gear ring 205 to rotate, and the expansion rod 208 and the spreading plates 209 begin to open outward. Meanwhile, the moving mold 102 and the bellows main body 104 still move towards the fixed mold 101 until the fixed mold 101 and the moving mold 102 are completely in contact and close together. In this way, during the process of the moving mold 102 continuously approaching the fixed mold 101, the expansion operation of the flared opening of the bellows main body 104 can be achieved.

[0057] After the expansion of the flared portion of the corrugated pipe body 104 is completed, there may be a small area in the flared portion where the material is wrinkled and uneven. Therefore, it is necessary to flatten the flared portion. After the flaring operation is completed, there may be some uneven or redundant materials at the flared portion. The specific operation of flattening is to level the flared portion of the corrugated pipe, and flatten or directly remove the redundant or uneven materials at the flared portion to ensure that the surface of the flared portion is smooth and flat, which is convenient for subsequent connection and construction, and is also convenient for the connection and installation of the pipe. After the expansion is completed, the operator manually starts the motor 105 in the fixed mold 101. The motor 105 is fixedly connected to the fixed mold 101. At the same time, the output shaft of the motor 105 is fixedly connected to the telescopic rod 303. The telescopic rod 303 rotates evenly under the drive of the rotation of the motor 105. Inside the fixed mold 101, there is also fixedly connected a third ring gear 301 that is consistent with the inner diameter of the fixed mold 101. One end of the telescopic rod 303 away from the center of the fixed mold 101 is rotatably connected to a gear 302. The gear 302 is a planet of the third ring gear 301. Since the third ring gear 301 is fixedly connected to the fixed mold 101, the third ring gear 301 will not move. Therefore, the gear 302 will rotate on its own when meshing with the third ring gear 301, and at the same time, it will revolve under the drive of the telescopic rod 303. On one side of the gear 302 facing the movable mold 102, there is a rotatably connected outer cylinder 306. At the same time, the gear 302 also passes through the surface of the outer cylinder 306 and extends to the inside to be fixedly connected to an inner cylinder 308. The outer cylinder 306 completely surrounds the inner cylinder 308, and only has a straight slot 307 opened at the bottom as the path for the worm 305 to communicate with the outside. On the surface of the inner cylinder 308, there are cross slides 309. The cross slides 309 are arranged in a circular cross shape and finally connected end to end to form a path. Inside the cross slides 309, there is a slidably connected slider 310. The slider 310 passes through the surface of the outer cylinder 306 and extends to the outside to be fixedly connected to a roller 311.

[0058] When the gear 302 rotates driven by the telescopic rod 303, the gear 302 also rotates around its own axis while meshing with the third gear ring 301. At this time, the gear 302, the outer cylinder 306 and the inner cylinder 308 are all outside the corrugated pipe body 104, and the rolling wheel 311 has already been in contact with the outer surface of the corrugated pipe body 104, ready to flatten the uneven area at the flared opening of the corrugated pipe body 104. When the flattening mechanism 300 rotates around the third gear ring 301 as a planet, the inner cylinder 308 also rotates together with the fixedly connected gear 302. At this time, the cross slideway 309 on the surface of the inner cylinder 308 rotates. Although the cross slideway 309 is slidably connected to the slider 310, the outer cylinder 306 provided outside the inner cylinder 308 restricts the position of the slider 310, that is, the slider 310 and the rolling wheel 311 do not rotate with the inner cylinder 308. Instead, under the restriction of the outer cylinder 306 and the straight slot 307 on the outside, a horizontal translation type rolling and flattening operation is performed on the surface of the corrugated pipe body 104. The straight slot 307 opened at the bottom of the outer cylinder 306 plays a role in restricting the slider 310, restricting the slider 310 to reciprocate only along the direction of the straight slot 307 and not moving in other directions. During the process of the rolling wheel 311 flattening the surface of the corrugated pipe body 104, the rolling wheel 311 and the slider 310 also revolve around the surface of the corrugated pipe body 104 together with the revolution of the gear 302. In this way, it can be ensured that the entire circumference of the flared opening of the corrugated pipe body 104 is flattened.

[0059] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A double-wall corrugated pipe flaring, expanding and flattening device, comprising a support mechanism (100), the support mechanism (100) including a fixed mold (101), and a moving mold (102) is arranged on the right side of the fixed mold (101), characterized in that, An expansion mechanism (200) is arranged inside the moving mold (102), and a flattening mechanism (300) is arranged inside the fixed mold (101). The expansion mechanism (200) includes a disc (206) that rotates to assist in expanding the port of the double-wall corrugated pipe. The disc (206) is arranged in the middle of the fixed mold (101). The expansion mechanism (200) is used to uniformly expand the corrugated pipe outward while the double-wall corrugated pipe enters. The flattening mechanism (300) includes an inner cylinder (308) that gradually flattens the port of the corrugated pipe without marks through reciprocating rotation. The inner cylinder (308) is arranged at the top of the fixed mold (101). The flattening mechanism (300) is used to simultaneously complete the rolling and smoothing operation on the expanded port of the double-wall corrugated pipe.

2. The double-wall corrugated pipe flaring, expanding and flattening device according to claim 1, characterized in that, The fixed mold (101) and the moving mold (102) are of the same size. A platform (103) is fixedly connected inside the moving mold (102). A corrugated pipe body (104) is fixedly connected above the platform (103). The inner diameter of the corrugated pipe body (104) is adapted to the moving mold (102). A motor (105) is fixedly connected in the middle of the fixed mold (101).

3. A double-wall corrugated pipe flaring, expanding and flattening device according to claim 1, characterized in that, The expansion mechanism (200) includes a support rod (201). The support rod (201) is fixedly connected to the left side of the moving mold (102). The support rod (201) is fixedly connected with a fixed ring (202). A first gear ring (203) is rotatably connected to the front end of the fixed ring (202). A spiral ring (204) is fixedly connected inside the first gear ring (203). One end of the first gear ring (203) close to the center of the moving mold (102) is meshed with a second gear ring (205).

4. A double-wall corrugated pipe flaring, expanding and flattening device according to claim 3, characterized in that, The middle of the second gear ring (205) is fixedly connected to the disc (206). An arc groove (207) is rotatably connected to the disc (206) close to the flattening mechanism (300). The bottom end of the arc groove (207) is fixedly connected to the moving mold (102). The disc (206) is also rotatably connected to the spiral ring (204).

5. A double-wall corrugated pipe flaring, expanding and flattening device according to claim 4, characterized in that, Six arc grooves (207) are evenly arranged on the surface of the disc (206). Expansion rods (208) are slidably connected to the inner sides of the six arc grooves (207). One ends of the six expansion rods (208) far from the middle of the fixed mold (101) are fixedly connected with spreading plates (209). The diameter of the spreading plates (209) is adapted to the corrugated pipe body (104).

6. A double-wall corrugated pipe flaring, expanding and flattening device according to claim 1, characterized in that, The flattening mechanism (300) includes a third gear ring (301). The third gear ring (301) is located inside the moving mold (102) and is fixedly connected to the moving mold (102). A gear (302) is meshed inside the third gear ring (301). One side of the gear (302) far from the moving mold (102) is rotatably connected to a telescopic rod (303). One end of the telescopic rod (303) far from the gear (302) is fixedly connected to the output shaft of the motor (105).

7. A double-wall corrugated pipe flaring, expanding and flattening device according to claim 6, characterized in that, One side of the telescopic rod (303) close to the expansion mechanism (200) is rotatably connected to a cross frame (304) fixedly connected to the fixed mold (101). The cross frame (304) passes through the telescopic rod (303) and is rotatably connected to the output shaft of the motor (105). One end of the cross frame (304) away from the center of the moving mold (102) is fixedly connected to a worm (305), and the height of the worm (305) is consistent with that of the first gear ring (203).

8. A double-wall corrugated pipe flaring, expanding and flattening device according to claim 6, characterized in that, One side of the gear (302) close to the moving mold (102) is rotatably connected to an outer cylinder (306). A straight notch (307) is formed on one side of the outer cylinder (306) facing the bellows body (104). The gear (302) also passes through the side of the outer cylinder (306) and is fixedly connected to an inner cylinder (308). The inner cylinder (308) is rotatably connected to the inside of the outer cylinder (306), and cross slideways (309) are formed on the surface of the inner cylinder (308).

9. The double-wall corrugated pipe flaring, expanding and flattening device according to claim 8, characterized in that, A slider (310) is slidably connected to the inside of the cross slideways (309). One side of the slider (310) away from the cross slideways (309) passes through the outer cylinder (306) and is fixedly connected to a roller (311). Four rollers (311) are provided and are all located outside the bellows body (104).

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