PE wire mesh skeleton pipe manufacturing equipment and method thereof

Abstract

The application relates to the field of steel wire mesh framework pipe manufacturing, in particular to a PE steel wire mesh framework pipe manufacturing device, which comprises a support, inner pipe fixing devices and outer pipe fixing devices are arranged on the support, a framework pipe body comprises an inner plastic pipe, an outer plastic pipe and a steel wire mesh framework, the outer wall of the inner plastic pipe and the inner wall of the outer plastic pipe are attached with hot melt adhesive, the device further comprises anti-friction devices, the anti-friction devices comprise a negative pressure pipe, a cylinder, a first sealing mechanism and a second sealing mechanism, air inlets are arranged on the cylinder, the two ends of the inner plastic pipe are sealed by the first sealing mechanism, and the two ends between the outer plastic pipe and the cylinder are sealed by the second sealing mechanism; with vacuumizing of the negative pressure pipe and the air inlets, the inner plastic pipe is deformed in a concave shape, the outer plastic pipe is deformed in a convex shape, the space between the inner plastic pipe and the outer plastic pipe is increased, the steel wire mesh framework is prevented from being damaged, and the strength of the steel wire mesh framework is ensured. The application also relates to a PE steel wire mesh framework pipe manufacturing method.

Description

Technical Field

[0001] This invention relates to the field of steel wire mesh reinforced pipe manufacturing, specifically to a PE steel wire mesh reinforced pipe manufacturing equipment and a PE steel wire mesh reinforced pipe manufacturing method. Background Technology

[0002] Traditional steel wire mesh reinforced plastic composite pipes typically involve at least five layers of composite structure. Besides the central steel wire mesh layer, there are two layers of hot melt adhesive adjacent to the inner and outer layers of the wire mesh, plus two layers of plastic. While this structure provides a stronger bond between the steel wire mesh and the plastic layers, it also presents technical drawbacks. Due to the different materials of the hot melt adhesive and plastic layers, their pressure and temperature resistance vary. Under harsh operating conditions, the hot melt adhesive is prone to deformation and failure, leading to detachment from the plastic layers and, in severe cases, pipe rupture. Furthermore, during the actual manufacturing process of the steel wire mesh, the steel wires are not integrally fixed and are prone to slippage. This not only causes friction damage to the steel wires during manufacturing but also results in uneven support strength in all directions, making the pipe susceptible to rupture under high pressure and high temperature conditions.

[0003] The currently disclosed Chinese patent CN201610892596.X discloses a method and equipment for manufacturing steel wire mesh reinforced plastic pipes. It includes a horizontally arranged support mandrel for supporting the forming of the steel wire mesh skeleton, an extrusion die core, a wire feeding reel, a high-frequency heater, an extruder, a cooling water tank, a traction machine, and a cutting machine. The number of wire feeding reels corresponds to the number of layers in the steel wire mesh skeleton, including straight and spiral wire feeding reels. The support mandrel passes sequentially through the wire feeding reels, supporting the steel wires emerging from the reels as they move forward. The high-frequency heater is positioned in front of the wire feeding reels to heat the steel wires, melting the hot melt coating covering the wires and causing the wires of adjacent layers to taper. The parts in contact are bonded together; the extrusion mandrel is set at the front end of the support mandrel and is used to extrude the plastic tube body on the formed wire mesh skeleton. Specifically, the support mandrel includes a support shaft body. Several axially extending semi-grooves are evenly opened on the outer circumferential surface of the support shaft body. The straight steel wires of the innermost support steel wire layer of the wire mesh skeleton are embedded in the semi-grooves one by one. Under the action of the traction machine, the support steel wire layer can move forward along the semi-grooves. Further, the adjacent semi-grooves are formed into strip planes to ensure that the intermediate winding steel wire layer spirally wound around the support steel wire layer always remains in a non-contact state with the support mandrel body.

[0004] According to the aforementioned patent, this patent achieves online forming of the wire mesh skeleton, ensuring that the wires do not shift or scatter, the wire mesh skeleton does not deform, and the bonding between the wire layers is reliable. The equipment realizes online continuous forming of the wire mesh skeleton and extrusion forming of the one-time plastic tube. However, this method requires the design of a new structure, which is relatively complex and cannot guarantee the stability of the wire mesh skeleton composite between two plastic tubes. Therefore, there is currently a need for a manufacturing device that can prevent frictional damage to the wire mesh skeleton when it is inserted between two plastic tubes by deforming the plastic tube. Summary of the Invention

[0005] To address the problems existing in the current technology, this application provides a PE steel wire mesh reinforced pipe manufacturing equipment. This application uses a first sealing mechanism to seal both ends of the inner plastic pipe and a second sealing mechanism to seal both ends of the outer plastic pipe and the cylinder. As the negative pressure pipe and the air port are evacuated, the inner plastic pipe undergoes concave deformation and the outer plastic pipe undergoes convex deformation, increasing the space between the inner and outer plastic pipes, preventing damage to the steel wire mesh skeleton, and ensuring the strength of the steel wire mesh skeleton.

[0006] To solve the problems of the prior art, the technical solution adopted by the present invention is as follows:

[0007] This invention provides a PE steel wire mesh reinforced pipe manufacturing equipment, including a support frame. The support frame is equipped with an inner pipe fixing device and an outer pipe fixing device for fixing the reinforced pipe body. The reinforced pipe body includes an inner plastic pipe, an outer plastic pipe, and a steel wire mesh reinforcement. The outer wall of the inner plastic pipe and the inner wall of the outer plastic pipe are both coated with hot melt adhesive. The equipment also includes an anti-friction device to prevent frictional damage when the steel wire mesh reinforcement penetrates the inner and outer plastic pipes. The anti-friction device includes a negative pressure pipe, a cylinder, a first sealing mechanism, and a second sealing mechanism. The negative pressure pipe is fixed to the support frame, and the outer diameter of the negative pressure pipe is smaller than that of the inner plastic pipe. The inner diameter of the cylinder is larger than the outer diameter of the outer plastic tube. An air port is provided on the cylinder. The first sealing mechanism is provided on the negative pressure tube. When the inner plastic tube is sleeved on the negative pressure tube, both ends of the inner plastic tube are sealed by the first sealing mechanism. The second sealing mechanism is provided on the cylinder. When the outer plastic tube is sleeved on the inner plastic tube and placed inside the cylinder, both ends of the outer plastic tube and the cylinder are sealed by the second sealing mechanism. The outer plastic tube and the inner plastic tube are coaxial, and a cavity is formed between the outer plastic tube and the cylinder.

[0008] Preferably, the first sealing mechanism includes a first disc-shaped sealing plug and a second disc-shaped sealing plug; the first disc-shaped sealing plug and the second disc-shaped sealing plug are respectively placed at both ends of the inner plastic tube, the first disc-shaped sealing plug is coaxial with the negative pressure tube and fixedly disposed at the end of the negative pressure tube away from the support, the second disc-shaped sealing plug is coaxial with the negative pressure tube and fixedly disposed on the support, the diameter of the first disc-shaped sealing plug and the second disc-shaped sealing plug are both equal to the inner diameter of the inner plastic tube, and both the first disc-shaped sealing plug and the second disc-shaped sealing plug have steps, when both ends of the inner plastic tube are sealed by the first disc-shaped sealing plug and the second disc-shaped sealing plug, the inner plastic tube is located between the two steps.

[0009] Preferably, the negative pressure pipe has several air holes along its axial direction, and a flexible tube is provided at one end of the negative pressure pipe near the support.

[0010] Preferably, the second sealing mechanism includes a first annular sealing plug and a second annular sealing plug; the first annular sealing plug and the second annular sealing plug are respectively placed between the two ends of the cylinder and the outer plastic tube. The first annular sealing plug is coaxial with the cylinder and fixedly disposed at the end of the cylinder away from the support. The second annular sealing plug is coaxial with the cylinder and fixedly disposed on the support. The inner diameter of both the first annular sealing plug and the second annular sealing plug is equal to the outer diameter of the outer plastic tube. The outer diameter of both the first annular sealing plug and the second annular sealing plug is equal to the inner diameter of the cylinder. Both the first annular sealing plug and the second annular sealing plug have steps. When the two ends between the outer plastic tube and the cylinder are sealed by the first annular sealing plug and the second annular sealing plug, the outer plastic tube is located between the two steps, and the two ends of the inner plastic tube and the outer plastic tube remain flush.

[0011] Preferably, the outer end face between the first disc-shaped sealing plug and the first annular sealing plug forms an inlet channel for the steel wire mesh skeleton to pass through the inner plastic tube and the outer plastic tube.

[0012] Preferably, the inner tube fixing device includes a first inner tube opening support mechanism and a second inner tube opening support mechanism; the first inner tube opening support mechanism is installed on the negative pressure tube and near the end of the first disc-shaped sealing plug, and the first inner tube opening support mechanism is located inside the inner plastic tube; the second inner tube opening support mechanism has the same structure as the first inner tube opening support mechanism, and there are two second inner tube opening support mechanisms, which are symmetrically arranged on the negative pressure tube and near the second disc-shaped sealing plug; an inner support drive mechanism is provided on the cylinder at the positions of the first inner tube opening support mechanism and each of the second inner tube opening support mechanisms.

[0013] Preferably, the outer tube fixing device includes an outer clamping mechanism; the outer clamping mechanism is located on the cylinder and near the support, and is located on the outside of the cylinder; the support is provided with an outer clamping drive mechanism.

[0014] Preferably, the first tube opening internal support mechanism includes an annular fixing frame and valves; the annular fixing frame is coaxial with the negative pressure tube and fixed to the inner surface of the first disc-shaped sealing plug; there are several valves, which are evenly distributed along the circumference of the annular fixing frame, one end of each valve is connected to the annular fixing frame, and the other end of each valve extends obliquely outward, with a first soft rubber pad on the extended end of each valve; the internal support drive mechanism includes an electromagnetic ring, which is coaxial with the cylinder, and the inner diameter of the electromagnetic ring is larger than the outer diameter of the outer plastic tube. An arc-shaped iron plate is provided between every two adjacent valves, and several arc-shaped iron plates are coaxial. A first guide rod extends from each arc-shaped iron plate toward the axis, and a side plate is provided at the position corresponding to each first guide rod on the annular fixing frame. The side plate has a guide opening for the corresponding first guide rod to pass through. When the electromagnetic ring is energized, the arc-shaped iron plate moves toward the electromagnetic ring, and the end of each valve with the first soft rubber pad is pressed against the inner wall of the inner plastic tube.

[0015] Preferably, the external clamping mechanism includes pressure plates; there are several pressure plates, which are evenly distributed along the circumference of the cylinder. Each pressure plate is located in the cavity between the cylinder and the outer plastic tube. Each pressure plate is provided with a second guide rod extending outward through the cylinder. The cylinder has a guide opening for each second guide rod to pass through. Each pressure plate has a second soft rubber pad on the side facing the outer plastic tube. The external clamping drive mechanism includes a rotating ring, which is coaxial with the cylinder and rotatably mounted on the support. The rotating ring and the support are connected by a bearing. A linkage rod is hinged between the rotating ring and each second guide rod. When the rotating ring rotates, each linkage rod pushes the corresponding pressure plate, causing the side with the second soft rubber pad to press against the outer wall of the outer plastic tube. The support is provided with a rotary driver for driving the rotating ring to rotate. A collar gear that is connected to the rotary driver is fixedly sleeved on the rotating ring.

[0016] This invention also provides a method for manufacturing PE steel wire mesh reinforced pipe, comprising the following steps:

[0017] S1, place the inner plastic tube between the first disc-shaped sealing plug and the second disc-shaped sealing plug;

[0018] S2, the outer plastic tube is placed coaxially between the first annular sealing plug and the second annular sealing plug, corresponding to the inner plastic tube;

[0019] S3, the inner plastic tube and the outer plastic tube are fixed by the inner tube fixing device and the outer tube fixing device respectively;

[0020] S4, the vacuum inside the inner plastic tube is drawn through the negative pressure tube, causing the inner plastic tube to deform concavely.

[0021] S5, the cavity between the outer plastic tube and the cylinder is evacuated through the air port on the cylinder, causing the outer plastic tube to bulge outward and deform.

[0022] S6, insert the steel wire mesh skeleton coaxially between the inner and outer plastic tubes, until the steel wire mesh skeleton is completely placed inside.

[0023] S7, reshape the inner and outer plastic tubes, and then melt the hot melt adhesive on the outer wall of the inner plastic tube and the inner wall of the outer plastic tube through a heating device, so that the skeleton tube body is compositely formed.

[0024] The advantages of this application compared to the prior art are:

[0025] 1. This application uses a first sealing mechanism to seal both ends of the inner plastic tube and a second sealing mechanism to seal both ends of the outer plastic tube and the cylinder. As the negative pressure pipe and the air port are evacuated, the inner plastic tube undergoes concave deformation and the outer plastic tube undergoes convex deformation, increasing the space between the inner and outer plastic tubes. This prevents friction when the wire mesh skeleton is inserted into the inner and outer plastic tubes, avoids damage to the wire mesh skeleton, and ensures the strength of the wire mesh skeleton.

[0026] 2. This application uses the first and second disc-shaped sealing plugs to plug both ends of the inner plastic tube, thereby sealing both ends of the inner plastic tube. When the negative pressure tube is evacuated, the sealing state is maintained, which realizes the deformation of the inner plastic tube into a concave state. This ensures that the wire mesh skeleton will not rub against the outer wall of the inner plastic tube when it is inserted between the inner and outer plastic tubes, thus avoiding damage to the wire mesh skeleton.

[0027] 3. This application uses a first annular sealing plug and a second annular sealing plug to plug both ends of the outer plastic tube and the cylinder, thereby sealing both ends of the outer plastic tube. When a vacuum is drawn through the air port, the sealed state is maintained, and the deformation of the outer plastic tube into an outward convex state is achieved. This ensures that the wire mesh skeleton will not rub against the inner wall of the outer plastic tube when it is inserted between the inner and outer plastic tubes, thus avoiding damage to the wire mesh skeleton. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of this application;

[0029] Figure 2 yes Figure 1 Top view;

[0030] Figure 3 yes Figure 2 Sectional view at point AA;

[0031] Figure 4 yes Figure 2 A three-dimensional structural cross-sectional view of point AA;

[0032] Figure 5 yes Figure 3Enlarged view of point B;

[0033] Figure 6 yes Figure 3 Enlarged view of point C;

[0034] Figure 7 yes Figure 3 Sectional view at DD;

[0035] Figure 8 yes Figure 3 A three-dimensional sectional view of the structure at point DD;

[0036] Figure 9 This is a partial three-dimensional structural diagram of the anti-friction device;

[0037] Figure 10 yes Figure 9 Top view;

[0038] Figure 11 yes Figure 10 Sectional view at EE;

[0039] Figure 12 yes Figure 11 Enlarged schematic diagram at point F;

[0040] Figure 13 This is a flowchart of a method for manufacturing PE steel wire mesh reinforced pipes.

[0041] The numbers on the map are:

[0042] 1-Staff;

[0043] 2-Inner tube fixing device;

[0044] 21-First tube end support mechanism; 211-Annular fixing frame; 2111-Side plate; 212-Valve; 2121-First soft rubber pad;

[0045] 22-Second pipe opening internal support mechanism;

[0046] 23-Internal support drive mechanism; 231-Electromagnetic ring; 232-Arc-shaped iron sheet; 2321-First guide rod;

[0047] 3-Outer tube fixing device;

[0048] 31-External clamping mechanism; 311-Pressure plate; 3111-Second guide rod; 3112-Second soft rubber pad;

[0049] 32-External clamping drive mechanism; 321-Rotating ring; 3211-Bearing; 322-Linkage rod; 323-Rotary actuator; 3231-Ring gear;

[0050] 4-Anti-friction device;

[0051] 41-Negative pressure tube; 411-Air vent; 412-Hose;

[0052] 42-Cylinder; 421-Air inlet; 422-Cavity;

[0053] 43-First sealing mechanism; 431-First disc-shaped sealing plug; 432-Second disc-shaped sealing plug;

[0054] 44-Second sealing mechanism; 441-First annular sealing plug; 4411-Inlet channel; 442-Second annular sealing plug;

[0055] 5-Skeleton tube body;

[0056] 51 - Inner plastic tube; 511 - Hot melt adhesive;

[0057] 52 - Outer plastic tube;

[0058] 53-Steel wire mesh skeleton. Detailed Implementation

[0059] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0060] See Figures 1-13 As shown, a PE steel wire mesh reinforced pipe manufacturing equipment includes a support 1. The support 1 is equipped with an inner pipe fixing device 2 and an outer pipe fixing device 3 for fixing the reinforced pipe body 5. The reinforced pipe body 5 includes an inner plastic pipe 51, an outer plastic pipe 52, and a steel wire mesh skeleton 53. The outer wall of the inner plastic pipe 51 and the inner wall of the outer plastic pipe 52 are both coated with hot melt adhesive 511. It also includes an anti-friction device 4 to prevent frictional damage when the steel wire mesh skeleton 53 penetrates into the inner plastic pipe 51 and the outer plastic pipe 52. The anti-friction device 4 includes a negative pressure pipe 41, a cylinder 42, a first sealing mechanism 43, and a second sealing mechanism 44. The negative pressure pipe 41 is fixed on the support 1, and the outer diameter of the negative pressure pipe 41 is smaller than the inner diameter of the inner plastic pipe 51. The cylinder 42... Fixed on the bracket 1, the cylinder 42 and the negative pressure pipe 41 are coaxial, the inner diameter of the cylinder 42 is larger than the outer diameter of the outer plastic pipe 52, and the cylinder 42 is provided with an air port 421; the first sealing mechanism 43 is provided on the negative pressure pipe 41, and when the inner plastic pipe 51 is sleeved on the negative pressure pipe 41, both ends of the inner plastic pipe 51 are sealed by the first sealing mechanism 43; the second sealing mechanism 44 is provided on the cylinder 42, and when the outer plastic pipe 52 is sleeved on the inner plastic pipe 51 and placed inside the cylinder 42, both ends between the outer plastic pipe 52 and the cylinder 42 are sealed by the second sealing mechanism 44, and the outer plastic pipe 52 and the inner plastic pipe 51 are coaxial, and a cavity 422 is formed between the outer plastic pipe 52 and the cylinder 42.

[0061] During the manufacturing process of the PE steel wire mesh skeleton 53 tube, firstly, the inner plastic tube 51 is placed on the first sealing mechanism 43, so that both ends of the inner plastic tube 51 are sealed and the inner plastic tube 51 and the negative pressure tube 41 are coaxial. Next, the outer plastic tube 52 is placed on the second sealing mechanism 44 and located inside the cylinder 42, so that both ends of the outer plastic tube 52 and the cylinder 42 are sealed and the outer plastic tube 52 and the cylinder 42 are coaxial and form a cavity 422. Subsequently, the inside of the inner plastic tube 51 is evacuated through the negative pressure tube 41, so that the inner plastic tube 51 is shaped into an inward state. Then, the cavity 422 is evacuated through the air port 421 on the cylinder 42, so that the outer plastic tube 52 is shaped into an outward state. The space between the tubes 51 is increased. However, when the wire mesh skeleton 53 is inserted coaxially between the outer plastic tube 52 and the inner plastic tube 51, corresponding to the cylinder 42, the increased space prevents the surface of the wire mesh skeleton 53 from rubbing against the outer plastic tube 52 and the inner plastic tube 51, thus avoiding damage to the wire mesh surface. After the wire mesh skeleton 53 is fully inserted, the vacuuming is stopped, and the inner plastic tube 51 and the outer plastic tube 52 return to their original shapes. The wire mesh skeleton 53 is sandwiched between them. Finally, the hot melt adhesive 511 on the outer plastic tube 52 and the inner plastic tube 51 is melted by the existing heating device, so that the outer plastic tube 52, the wire mesh skeleton 53 and the inner plastic tube 51 are completely composited, completing the manufacturing of the skeleton tube body 5.

[0062] See Figure 5 and Figure 6 As shown, the first sealing mechanism 43 includes a first disc-shaped sealing plug 431 and a second disc-shaped sealing plug 432. The first disc-shaped sealing plug 431 and the second disc-shaped sealing plug 432 are respectively placed at both ends of the inner plastic tube 51. The first disc-shaped sealing plug 431 is coaxial with the negative pressure tube 41 and fixedly disposed at the end of the negative pressure tube 41 away from the support 1. The second disc-shaped sealing plug 432 is coaxial with the negative pressure tube 41 and fixedly disposed on the support 1. The diameters of the first disc-shaped sealing plug 431 and the second disc-shaped sealing plug 432 are both equal to the inner diameter of the inner plastic tube 51. The first disc-shaped sealing plug 431 and the second disc-shaped sealing plug 432 both have steps. When both ends of the inner plastic tube 51 are sealed by the first disc-shaped sealing plug 431 and the second disc-shaped sealing plug 432, the inner plastic tube 51 is located between the two steps.

[0063] During the process of sealing both ends of the inner plastic tube 51 by the first sealing mechanism 43, the inner plastic tube 51 is placed between the first disc-shaped sealing plug 431 and the second disc-shaped sealing plug 432. The opening of the inner plastic tube 51 is blocked by the first disc-shaped sealing plug 431 and the second disc-shaped sealing plug 432. Since both the first disc-shaped sealing plug 431 and the second disc-shaped sealing plug 432 have steps, the inner plastic tube 51 is held stable between the first disc-shaped sealing plug 431 and the second disc-shaped sealing plug 432.

[0064] See Figures 4-6 As shown, a number of air holes 411 are provided on the negative pressure pipe 41 along its axial direction, and a flexible hose 412 is provided at one end of the negative pressure pipe 41 near the support 1.

[0065] When the negative pressure tube 41 draws air through the hose 412, the air inside the inner plastic tube 51 is drawn out through several air holes 411 on the negative pressure tube 41 until the inner plastic tube 51 deforms under vacuum negative pressure.

[0066] See Figure 5 and Figure 6 As shown, the second sealing mechanism 44 includes a first annular sealing plug 441 and a second annular sealing plug 442; the first annular sealing plug 441 and the second annular sealing plug 442 are respectively placed between the two ends of the cylinder 42 and the outer plastic tube 52. The first annular sealing plug 441 is coaxial with the cylinder 42 and fixedly disposed at the end of the cylinder 42 away from the support 1, and the second annular sealing plug 442 is coaxial with the cylinder 42 and fixedly disposed on the support 1. The inner diameter of cylinder 42 is equal to the outer diameter of outer plastic tube 52. The outer diameters of the first annular sealing plug 441 and the second annular sealing plug 442 are equal to the inner diameter of cylinder 42. The first annular sealing plug 441 and the second annular sealing plug 442 both have steps. When the two ends between outer plastic tube 52 and cylinder 42 are sealed by the first annular sealing plug 441 and the second annular sealing plug 442, outer plastic tube 52 is located between the two steps, and the two ends of inner plastic tube 51 and outer plastic tube 52 are kept flush.

[0067] During the process of sealing both ends of the outer plastic tube 52 by the second sealing mechanism 44, the outer plastic tube 52 is placed between the first annular sealing plug 441 and the second annular sealing plug 442, and the outer plastic tube 52 is inside the cylinder 42 and remains coaxial with it. The cavity 422 between the outer plastic tube 52 and the cylinder 42 is blocked by the first annular sealing plug 441 and the second annular sealing plug 442. Since both the first annular sealing plug 441 and the second annular sealing plug 442 have steps, the outer plastic tube 52 is held stable between the first annular sealing plug 441 and the second annular sealing plug 442.

[0068] See Figure 5As shown, the outer end face between the first disc-shaped sealing plug 431 and the first annular sealing plug 441 forms an inlet channel 4411 for the steel wire mesh skeleton 53 to pass into the inner plastic tube 51 and the outer plastic tube 52.

[0069] When the wire mesh skeleton 53 is inserted into the inner plastic tube 51 and the outer plastic tube 52, since an inlet channel 4411 is formed between the first disc-shaped sealing plug 431 and the first annular sealing plug 441, the wire mesh skeleton 53 will not rub against the end openings of the inner plastic tube 51 and the outer plastic tube 52 when it is inserted into the inlet channel 4411.

[0070] See Figure 4 As shown, the inner tube fixing device 2 includes a first inner tube opening support mechanism 21 and a second inner tube opening support mechanism 22. The first inner tube opening support mechanism 21 is installed on the negative pressure tube 41 and near the end of the first disc-shaped sealing plug 431. The first inner tube opening support mechanism 21 is located inside the inner plastic tube 51. The second inner tube opening support mechanism 22 has the same structure as the first inner tube opening support mechanism 21. There are two second inner tube opening support mechanisms 22, which are symmetrically arranged on the negative pressure tube 41 and near the second disc-shaped sealing plug 432. An inner support drive mechanism 23 is provided on the cylinder 42 at the positions of the first inner tube opening support mechanism 21 and each of the second inner tube opening support mechanisms 22.

[0071] When the inner tube fixing device 2 fixes the inner plastic tube 51, the inner support driving mechanism 23 drives the corresponding first pipe opening inner support mechanism 21 and second pipe opening inner support mechanism 22 to fix the inner plastic tube 51 in an inner support manner, maintaining the stability of the inner plastic tube 51 and maintaining the coaxial state between the inner plastic tube 51 and the negative pressure tube 41.

[0072] See Figure 4 As shown, the outer tube fixing device 3 includes an outer clamping mechanism 31; the outer clamping mechanism 31 is located on the cylinder 42 and close to the support 1, and the outer clamping mechanism 31 is located on the outside of the cylinder 42; the support 1 is provided with an outer clamping drive mechanism 32.

[0073] When the external fixing device fixes the outer plastic tube 52, the external clamping mechanism 31 is driven by the external clamping drive mechanism 32 to clamp the outer plastic tube 52, thereby maintaining the stability of the outer plastic tube 52 and keeping the outer plastic tube 52 and the inner plastic tube 51 coaxial.

[0074] See Figure 5 and Figure 12As shown, the first tube opening internal support mechanism 21 includes an annular fixing frame 211 and valves 212; the annular fixing frame 211 is coaxial with the negative pressure tube 41 and fixed to the inner surface of the first disc-shaped sealing plug 431; there are several valves 212, which are evenly distributed along the circumference of the annular fixing frame 211, one end of each valve 212 is connected to the annular fixing frame 211, and the other end of each valve 212 extends obliquely outward, and each valve 212 extension end has a first soft rubber pad 2121; the internal support drive mechanism 23 includes an electromagnetic ring 231, which is coaxially arranged with the cylinder 42, and the inner diameter of the electromagnetic ring 231 is large. On the outer diameter of the outer plastic tube 52, an arc-shaped iron plate 232 is provided between every two adjacent valves 212. Several arc-shaped iron plates 232 are coaxial. Each arc-shaped iron plate 232 has a first guide rod 2321 extending towards the axis. The annular fixing frame 211 has a side plate 2111 at the position corresponding to each first guide rod 2321. The side plate 2111 has a guide opening for the corresponding first guide rod 2321 to pass through. When the electromagnetic ring 231 is energized, the arc-shaped iron plate 232 moves toward the electromagnetic ring 231. The end of each valve 212 with the first soft rubber pad 2121 is in a state of pressing against the inner wall of the inner plastic tube 51.

[0075] When the first port internal support mechanism 21 and the second port internal support mechanism 22 are activated, the electromagnetic ring 231 is energized, causing several arc-shaped iron pieces 232 to move closer to the inner wall of the inner plastic tube 51. Since each arc-shaped iron piece 232 is located between two adjacent valves 212, the valves 212 are pushed by the arc-shaped iron pieces 232 to swing towards the inner wall of the inner plastic tube 51 until the end of the valve 212 with the first soft rubber pad 2121 presses against the inner wall of the inner plastic tube 51. Under the pressure of several valves 212, the inner plastic tube 51 is thus fixed. When the electromagnetic ring 231 is de-energized, since the valves 212 are elastic, the valves 212 return to their normal state, causing the arc-shaped iron pieces 232 to move away from the inner plastic tube 51.

[0076] See Figure 7 and Figure 8As shown, the outer clamping mechanism 31 includes a pressure plate 311; there are several pressure plates 311, which are evenly distributed along the circumference of the cylinder 42. Each pressure plate 311 is located in the cavity 422 between the cylinder 42 and the outer plastic tube 52. Each pressure plate 311 is provided with a second guide rod 3111 extending outward through the cylinder 42. The cylinder 42 has a guide opening for each second guide rod 3111 to pass through. Each pressure plate 311 has a second soft rubber pad 3112 on the side facing the outer plastic tube 52. The outer clamping drive mechanism 32 includes a rotating ring 321, which is connected to the cylinder 42. The cylinder 42 is coaxially and rotatably mounted on the bracket 1. The rotating ring 321 is connected to the bracket 1 through the bearing 3211. A linkage rod 322 is hinged between the rotating ring 321 and each second guide rod 3111. When the rotating ring 321 rotates, each linkage rod 322 pushes the corresponding pressure plate 311, causing the side with the second soft rubber pad 3112 to press against the outer wall of the outer plastic tube 52. The bracket 1 is provided with a rotary driver 323 for driving the rotating ring 321 to rotate. A collar gear 3231 that is connected to the rotary driver 323 is fixedly sleeved on the rotating ring 321.

[0077] When the outer clamping mechanism 31 is activated, the rotary driver 323 drives the rotation of the rotating ring 321 through the transmission connection with the ring gear 3231. The rotation of the rotating ring 321 drives the movement of several linkage rods 322, thereby pushing the corresponding second guide rod 3111 to move toward the outer plastic tube 52 until the side of the pressure plate 311 with the second soft rubber pad 3112 presses against the outer wall of the outer plastic tube 52. Under the pressure of several pressure plates 311, the outer plastic tube 52 is thus fixed.

[0078] See Figure 13 As shown, a method for manufacturing a PE steel wire mesh reinforced pipe includes the following steps:

[0079] S1, place the inner plastic tube 51 between the first disc-shaped sealing plug 431 and the second disc-shaped sealing plug 432;

[0080] S2, the outer plastic tube 52 is placed coaxially with the inner plastic tube 51 between the first annular sealing plug 441 and the second annular sealing plug 442;

[0081] S3, the inner plastic tube 51 and the outer plastic tube 52 are fixed by the inner tube fixing device 2 and the outer tube fixing device 3 respectively;

[0082] S4, the vacuum inside the inner plastic tube 51 is drawn through the negative pressure tube 41, causing the inner plastic tube 51 to deform inward.

[0083] S5, the cavity 422 between the outer plastic tube 52 and the cylinder 42 is evacuated through the air port 421 on the cylinder 42, causing the outer plastic tube 52 to bulge outward.

[0084] S6, insert the wire mesh frame 53 coaxially with the cylinder 42 between the inner plastic tube 51 and the outer plastic tube 52 until the wire mesh frame 53 is completely placed therein;

[0085] S7, the inner plastic tube 51 and the outer plastic tube 52 are restored to their original shapes, and then the hot melt adhesive 511 on the outer wall of the inner plastic tube 51 and the inner wall of the outer plastic tube 52 is melted by the heating device, so that the skeleton tube body 5 is compositely formed.

[0086] This application uses a first sealing mechanism 43 to seal both ends of the inner plastic tube 51 and a second sealing mechanism 44 to seal both ends of the outer plastic tube 52 and the cylinder 42. As the negative pressure tube 41 and the air port 421 are evacuated, the inner plastic tube 51 undergoes concave deformation and the outer plastic tube 52 undergoes convex deformation, increasing the space between the inner plastic tube 51 and the outer plastic tube 52, preventing damage to the wire mesh skeleton 53 and ensuring the strength of the wire mesh skeleton 53.

[0087] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A PE steel wire mesh reinforced pipe manufacturing equipment, comprising a support (1), wherein the support (1) is provided with an inner pipe fixing device (2) and an outer pipe fixing device (3) for fixing the reinforced pipe body (5), the reinforced pipe body (5) comprising an inner plastic pipe (51), an outer plastic pipe (52) and a steel wire mesh skeleton (53), wherein the outer wall of the inner plastic pipe (51) and the inner wall of the outer plastic pipe (52) are both covered with hot melt adhesive (511); Its features are, It also includes an anti-friction device (4) to prevent friction damage when the wire mesh skeleton (53) is inserted into the inner plastic tube (51) and the outer plastic tube (52). The anti-friction device (4) includes a negative pressure tube (41), a cylinder (42), a first sealing mechanism (43), and a second sealing mechanism (44). The negative pressure tube (41) is fixed on the bracket (1), and the outer diameter of the negative pressure tube (41) is smaller than the inner diameter of the inner plastic tube (51); The cylinder (42) is fixed on the bracket (1). The cylinder (42) and the negative pressure pipe (41) are coaxial. The inner diameter of the cylinder (42) is larger than the outer diameter of the outer plastic pipe (52). An air port (421) is opened on the cylinder (42). The first sealing mechanism (43) is installed on the negative pressure pipe (41). When the inner plastic pipe (51) is sleeved on the negative pressure pipe (41), both ends of the inner plastic pipe (51) are sealed by the first sealing mechanism (43). The second sealing mechanism (44) is set on the cylinder (42). When the outer plastic tube (52) is sleeved on the inner plastic tube (51) and placed inside the cylinder (42), the two ends between the outer plastic tube (52) and the cylinder (42) are sealed by the second sealing mechanism (44). The outer plastic tube (52) and the inner plastic tube (51) are coaxial, and a cavity (422) is formed between the outer plastic tube (52) and the cylinder (42).

2. The PE steel wire mesh reinforced pipe manufacturing equipment according to claim 1, characterized in that, The first sealing mechanism (43) includes a first disc-shaped sealing plug (431) and a second disc-shaped sealing plug (432); The first disc-shaped sealing plug (431) and the second disc-shaped sealing plug (432) are respectively placed at both ends of the inner plastic tube (51). The first disc-shaped sealing plug (431) is coaxial with the negative pressure tube (41) and fixedly set at the end of the negative pressure tube (41) away from the support (1). The second disc-shaped sealing plug (432) is coaxial with the negative pressure tube (41) and fixedly set on the support (1). The diameters of the first disc-shaped sealing plug (431) and the second disc-shaped sealing plug (432) are both equal to the inner diameter of the inner plastic tube (51). The first disc-shaped sealing plug (431) and the second disc-shaped sealing plug (432) both have steps. When both ends of the inner plastic tube (51) are sealed by the first disc-shaped sealing plug (431) and the second disc-shaped sealing plug (432), the inner plastic tube (51) is located between the two steps.

3. The PE steel wire mesh reinforced pipe manufacturing equipment according to claim 2, characterized in that, Several air holes (411) are provided on the negative pressure pipe (41) along its axial direction, and a flexible hose (412) is provided at one end of the negative pressure pipe (41) near the support (1).

4. The PE steel wire mesh reinforced pipe manufacturing equipment according to claim 2, characterized in that, The second sealing mechanism (44) includes a first annular sealing plug (441) and a second annular sealing plug (442); The first annular sealing plug (441) and the second annular sealing plug (442) are respectively placed between the two ends of the cylinder (42) and the outer plastic tube (52). The first annular sealing plug (441) is coaxial with the cylinder (42) and fixedly disposed at the end of the cylinder (42) away from the support (1). The second annular sealing plug (442) is coaxial with the cylinder (42) and fixedly disposed on the support (1). The inner diameter of the first annular sealing plug (441) and the second annular sealing plug (442) are both equal to the outer diameter of the outer plastic tube (52). The outer diameters of the first annular sealing plug (441) and the second annular sealing plug (442) are both equal to the inner diameter of the cylinder (42). Both the first annular sealing plug (441) and the second annular sealing plug (442) have steps. When the two ends between the outer plastic tube (52) and the cylinder (42) are sealed by the first annular sealing plug (441) and the second annular sealing plug (442), the outer plastic tube (52) is located between the two steps, and the two ends of the inner plastic tube (51) and the outer plastic tube (52) are kept flush.

5. The PE steel wire mesh reinforced pipe manufacturing equipment according to claim 4, characterized in that, An inlet channel (4411) is formed on the outer end face between the first disc-shaped sealing plug (431) and the first annular sealing plug (441) for the wire mesh skeleton (53) to pass into the inner plastic tube (51) and the outer plastic tube (52).

6. The PE steel wire mesh reinforced pipe manufacturing equipment according to claim 5, characterized in that, The inner tube fixing device (2) includes a first inner tube opening support mechanism (21) and a second inner tube opening support mechanism (22); The first pipe opening internal support mechanism (21) is installed on the negative pressure pipe (41) and close to the end of the first disc-shaped sealing plug (431). The first pipe opening internal support mechanism (21) is located inside the inner plastic pipe (51). The second pipe opening internal support mechanism (22) has the same structure as the first pipe opening internal support mechanism (21). There are two second pipe opening internal support mechanisms (22). The two second pipe opening internal support mechanisms (22) are symmetrically arranged on the negative pressure pipe (41) and close to the second disc-shaped sealing plug (432). An internal support drive mechanism (23) is provided on the cylinder (42) at the positions of the first internal support mechanism (21) and each second internal support mechanism (22).

7. The PE steel wire mesh reinforced pipe manufacturing equipment according to claim 6, characterized in that, The outer tube fixing device (3) includes an outer clamping mechanism (31); The outer clamping mechanism (31) is located on the cylinder (42) and close to the support (1). The outer clamping mechanism (31) is located on the outside of the cylinder (42). The bracket (1) is equipped with an external clamping drive mechanism (32).

8. The PE steel wire mesh reinforced pipe manufacturing equipment according to claim 6, characterized in that, The first tube opening internal support mechanism (21) includes an annular fixing frame (211) and a valve (212); The annular fixing bracket (211) is coaxial with the negative pressure tube (41) and fixed to the inner surface of the first disc-shaped sealing plug (431); There are several valves (212), and the several valves (212) are evenly distributed along the circumference of the annular fixation frame (211). One end of each valve (212) is connected to the annular fixation frame (211), and the other end of each valve (212) extends obliquely outward. Each valve (212) has a first soft rubber pad (2121) on its extended end. The internal support drive mechanism (23) includes an electromagnetic ring (231), which is coaxially arranged with the cylinder (42). The inner diameter of the electromagnetic ring (231) is larger than the outer diameter of the outer plastic tube (52). An arc-shaped iron plate (232) is provided between every two adjacent valves (212). Several arc-shaped iron plates (232) are coaxial. A first guide rod (2321) extends from each arc-shaped iron plate (232) toward the axis and is fixed in a ring shape. Each of the first guide rods (2321) on the frame (211) has a side plate (2111) at the position corresponding to each first guide rod (2321). The side plate (2111) has a guide opening for the corresponding first guide rod (2321) to pass through. When the electromagnetic ring (231) is energized, the arc-shaped iron piece (232) moves toward the electromagnetic ring (231). The end of each valve (212) with the first soft rubber pad (2121) is pressed against the inner wall of the inner plastic tube (51).

9. The PE steel wire mesh reinforced pipe manufacturing equipment according to claim 7, characterized in that, The external clamping mechanism (31) includes a pressure plate (311); There are several pressure plates (311), and the pressure plates (311) are evenly distributed along the circumference of the cylinder (42). Each pressure plate (311) is located in the cavity (422) between the cylinder (42) and the outer plastic tube (52). Each pressure plate (311) is provided with a second guide rod (3111) extending outward through the cylinder (42). The cylinder (42) is provided with a guide opening for each second guide rod (3111) to pass through. Each pressure plate (311) has a second soft rubber pad (3112) on the side facing the outer plastic tube (52). The external clamping drive mechanism (32) includes a rotating ring (321), which is coaxial with the cylinder (42) and rotatably mounted on the bracket (1). The rotating ring (321) is connected to the bracket (1) by a bearing (3211). A linkage rod (322) is hinged between the rotating ring (321) and each second guide rod (3111). When the rotating ring (321) rotates, each linkage rod (322) pushes the corresponding pressure plate (311) so that the side with the second soft rubber pad (3112) is pressed against the outer wall of the outer plastic tube (52). The bracket (1) is provided with a rotary driver (323) for driving the rotating ring (321) to rotate, and the rotating ring (321) is fixedly fitted with a ring gear (3231) that is connected to the rotary driver (323) for transmission.

10. A method for manufacturing PE steel wire mesh reinforced pipe, applied to the PE steel wire mesh reinforced pipe manufacturing equipment described in any one of claims 1-9, characterized in that, Includes the following steps: S1, place the inner plastic tube (51) between the first disc-shaped sealing plug (431) and the second disc-shaped sealing plug (432); S2, the outer plastic tube (52) is placed coaxially between the first annular sealing plug (441) and the second annular sealing plug (442) corresponding to the inner plastic tube (51); S3, the inner plastic tube (51) and the outer plastic tube (52) are fixed by the inner tube fixing device (2) and the outer tube fixing device (3) respectively; S4, the vacuum inside the inner plastic tube (51) is evacuated through the negative pressure tube (41), causing the inner plastic tube (51) to deform concavely. S5, the cavity (422) between the outer plastic tube (52) and the cylinder (42) is evacuated through the air port (421) on the cylinder (42), causing the outer plastic tube (52) to bulge outward; S6, insert the wire mesh frame (53) coaxially between the inner plastic tube (51) and the outer plastic tube (52) corresponding to the cylinder (42) until the wire mesh frame (53) is completely placed therein; S7, the inner plastic tube (51) and the outer plastic tube (52) are restored to their original shapes, and then the hot melt adhesive (511) on the outer wall of the inner plastic tube (51) and the inner wall of the outer plastic tube (52) is melted by the heating device, so that the skeleton tube body (5) is composite formed.

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