Novel die of steel wire mesh reinforced polyethylene composite pipeline for water supply

Abstract

The utility model discloses a novel die of a steel wire mesh reinforced polyethylene composite pipeline for water supply, which comprises a feeding nozzle, the inlet end of the feeding nozzle is in threaded connection with the inner pipe surface of a casing pipe, the outlet end of the feeding nozzle is communicated with a coiled pipe through an adapter block, and the outlet end of the coiled pipe is communicated with a hollow shaft of a tail cover plate of the casing pipe. A shaft body of the hollow shaft is annularly provided with a plurality of pouring channels communicated to the interior of the outer mold pipe, an inner mold rod sharing the same central axis with the outer mold pipe is arranged in the outer mold pipe, and the inner mold rod is connected with the end face of the hollow shaft; the die can be matched with an extruder to manufacture an inner core pipe of a steel wire mesh reinforced polyethylene composite pipe, an extrusion runner is S-shaped due to the application of a coiled pipe in the die, the pressure in the runner is effectively improved, the production speed can reach 1.9 m / min, the extruded inner core pipe has better shrinkage performance, and the die adopts a modular structure and has stronger applicability; and the extrusion requirements of inner core pipes with different specifications can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of composite pipe processing equipment, and particularly relates to a novel mold for a steel wire mesh reinforced polyethylene composite pipe for water supply. Background Technique

[0002] The steel wire mesh reinforced polyethylene composite pipe is a new type of pipe with a mesh skeleton formed by high-strength steel wires wound around in a left-right spiral as the reinforcement, high-density polyethylene as the matrix, and a high-performance modified bonding resin tightly connecting the steel wire skeleton with the inner and outer layers of high-density polyethylene. This pipe has high pressure resistance and excellent flexibility at the same time, and is suitable for long-distance buried water supply and gas transmission pipeline systems, and is widely used in various fields. When manufacturing this pipe, it is necessary to first prepare the inner core pipe through the cooperation of an extruder and a mold. The extrusion efficiency in this process is relatively low, usually about 0.8 m / min, and bubbles are likely to occur, which is mainly due to insufficient extrusion pressure in the flow channel; in addition, the applicability of the existing mold is poor, and it is difficult to meet the extrusion requirements of various pipelines. When it is necessary to change the specifications or perform maintenance, the whole mold must be removed, which is very time-consuming and laborious; moreover, the existing mold does not have a temperature control function, and it is difficult to adjust the temperature after the molten liquid is squeezed into the flow channel, and blockage is likely to occur. A novel mold is needed to solve the above problems. Content of the Utility Model

[0003] To solve the above problems, the utility model provides a novel mold for a steel wire mesh reinforced polyethylene composite pipe for water supply, which includes a feed nozzle. The inlet end of the feed nozzle is threadedly connected to the inner pipe surface of the shell sleeve, and the outlet end of the feed nozzle is connected to a serpentine pipe through an adapter block. The outlet end of the serpentine pipe is connected to the hollow shaft of the tail cover plate of the shell sleeve. A plurality of casting channels communicating with the inside of the outer mold pipe are annularly arranged on the shaft body of the hollow shaft. An inner mold rod coaxial with the outer mold pipe is arranged inside the outer mold pipe, and the inner mold rod is connected to the end face of the hollow shaft.

[0004] Further, the shape and the internal cavity of the feed nozzle are a cone and a conical cavity respectively. The thick end of the cone is the inlet end of the feed nozzle. A flange A is arranged on the outer side wall of the inlet end. The side face of the flange A is threadedly connected to the head end of the inner pipe surface of the shell sleeve, and the screw holes on the end face of the flange A are connected to the extruder; the thin end of the cone is the outlet end of the feed nozzle. The outlet end is threadedly connected to the threaded counterbore of the adapter block, and the threaded through hole at the center of the bottom surface of the threaded counterbore is threadedly connected to the head end of the serpentine pipe.

[0005] Further, the flange B of the cover plate is connected to the tail end face of the shell sleeve through bolts. The outer end face of the cover plate is threadedly connected to the flange C of the outer mold pipe. The inner end face of the cover plate is attached to the limit plate at the tail of the serpentine pipe body. The tail end of the serpentine pipe is threadedly connected to the hollow shaft.

[0006] Further, the serpentine tube is located inside the electric heating solenoid. The nozzle end of the electric heating solenoid is sleeved on the ring frame at the inner end face of the cover plate, and the wire harness at the head end of the electric heating solenoid is connected to an external power supply through the external interface on the body of the shell sleeve tube.

[0007] Further, the serpentine tube, the outer die tube, and the inner die rod have multiple models with different sizes, and the interfaces of each model are kept consistent.

[0008] The beneficial effects of the present utility model are as follows: The utility model can cooperate with an extruder to manufacture the inner core tube of a steel wire mesh reinforced polyethylene composite pipe. The application of the serpentine tube in the mold makes the extrusion flow channel into an S shape, effectively increasing the pressure in the flow channel, enabling the production speed to reach 1.9 m / min. The extruded inner core tube has better shrinkage performance. The mold adopts a modular structure and has stronger applicability, capable of meeting the extrusion requirements of inner core tubes of different specifications. The mold is internally provided with an electric heating solenoid, which can heat the molten liquid wriggling in the serpentine tube, avoiding raw material blockage when the equipment is on standby or decelerating. Description of the Drawings

[0009] Figure 1 It is a front view structural schematic diagram of the present utility model.

[0010] The description of the reference numerals in the drawings is as follows: 1, feed nozzle; 101, flange A; 2, shell sleeve tube; 201, external interface; 3, adapter block; 4, serpentine tube; 5, cover plate; 501, hollow shaft; 502, pouring channel; 503, flange B; 504, ring frame; 6, outer die tube; 601, flange C; 7, inner die rod; 8, electric heating solenoid. Detailed Embodiment

[0011] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0012] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0013] The present utility model will be further described below in conjunction with the accompanying drawings of the specification:

[0014] As Figure 1 shown, a new type of mold for a steel wire mesh reinforced polyethylene composite pipe for water supply includes a feed nozzle 1. The shape and internal cavity of the feed nozzle 1 are a cone and a conical cavity respectively. The thick end of the cone is the inlet end of the feed nozzle 1, and a flange A101 is provided on the outer side wall of the inlet end. The end face screw holes of the flange A101 are connected to an extruder, and the side face of the flange A101 is threadedly connected to the head end of the inner tube surface of the shell sleeve 2. The tail end face of the shell sleeve 2 is bolted to the flange B503 of the cover plate 5.

[0015] In this embodiment, the thin end of the cone is the outlet end of the feed nozzle 1. The outlet end is threadedly connected to the threaded counterbore of the adapter block 3, and the threaded through hole at the center of the bottom surface of the threaded counterbore is threadedly connected to the head end of the serpentine tube 4. The serpentine tube 4 is located inside the electric heating solenoid 8. The tail end of the pipe orifice of the electric heating solenoid 8 is sleeved on the ring frame 504 on the inner end face of the cover plate 5. The wire harness at the head end of the electric heating solenoid 8 is connected to an external power supply through the external interface 201 on the pipe body of the shell sleeve 2. The limiting disk 401 at the tail of the pipe body of the serpentine tube 4 is in contact with the inner end face of the cover plate 5. The outlet end of the serpentine tube 4 is threadedly connected to the hollow shaft 501 of the cover plate 5 at the tail of the shell sleeve 2. A plurality of casting channels 502 communicating with the inside of the outer die tube 6 are provided in a ring shape on the shaft body of the hollow shaft 501.

[0016] In this embodiment, the outer end face of the cover plate 5 is threadedly connected to the flange C601 of the outer die tube 6. An inner die rod 7 coaxial with it is provided inside the outer die tube 6, and the inner die rod 7 is connected to the end face of the hollow shaft 501. The plastic melt extruded into the outer die tube 6 through the feed nozzle 1 and the serpentine tube 4 forms an inner core tube after filling the gap between the inner die rod 7 and the outer die tube 6 and then being further extruded. Among them, the wall thickness of the inner core tube is the difference between the radii of the outer die tube 6 and the inner die rod 7. The above-mentioned serpentine tube 4, outer die tube 6, and inner die rod 7 have multiple models with different sizes, and the interfaces of each model are kept consistent to meet the extrusion requirements of inner core tubes of different specifications.

[0017] The working principle of the present utility model is as follows:

[0018] Connect the inlet end of the feed nozzle 1 to the tail of the extruder through bolts, screw the adapter block 3 onto the outlet end of the feed nozzle 1, then screw the shell sleeve 2 equipped with the electric heating solenoid 8 onto the flange A101. At this time, the adapter block 3 is located at the center of the electric heating solenoid 8. Subsequently, connect the serpentine tube 4 to the adapter block 3, and then screw the cover plate 5 onto the tail end of the serpentine tube 4. When the limit disc 401 fits against the inner end face of the cover plate 5, the tail end of the nozzle of the electric heating solenoid 8 just fits into the ring frame 504, and the through hole of the flange B503 is aligned with the screw holes on the end face of the tail of the shell sleeve 2. Fix the flange B503 to the shell sleeve 2 through bolts, then screw the inner die rod 7 onto the end face of the hollow shaft 501, and finally fix the outer die tube 6 to the outer end face of the cover plate 5 through the flange C601 to complete the die assembly.

[0019] When performing the extrusion operation, the plastic melt enters the conical cavity of the feed nozzle 1 from the extruder and is then squeezed into the serpentine tube 4 from the conical cavity. Since the flow channel in the serpentine tube 4 is S-shaped and has a higher pressure compared to a common straight flow channel, the production speed can reach 1.9 m / min, and the extruded inner core tube has better shrinking performance and is not prone to generating bubbles. Subsequently, the melt enters the outer die tube 6 through the pouring channel 502. After filling the gap between the inner die rod 7 and the outer die tube 6, it is further extruded to form the inner core tube.

[0020] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A new type of mold for a steel wire mesh reinforced polyethylene composite pipe for water supply, comprising a feed nozzle (1), characterized in that: The inlet end of the feed nozzle (1) is threadedly connected to the inner pipe surface of the shell sleeve (2). The outlet end of the feed nozzle (1) is connected to the serpentine pipe (4) through the adapter block (3). The outlet end of the serpentine pipe (4) is connected to the hollow shaft (501) of the tail cover plate (5) of the shell sleeve (2). A number of casting channels (502) communicating with the inside of the outer mold pipe (6) are provided around the shaft body of the hollow shaft (501). An inner mold rod (7) coaxial with it is arranged inside the outer mold pipe (6), and the inner mold rod (7) is connected to the end face of the hollow shaft (501).

2. The novel mold for a wire mesh reinforced polyethylene composite pipe for water supply according to claim 1, characterized in that: The shape and internal cavity of the feed nozzle (1) are a cone and a conical cavity respectively. The thick end of the cone is the inlet end of the feed nozzle (1). A flange A (101) is provided on the outer side wall of the inlet end. The side surface of the flange A (101) is threadedly connected to the head end of the inner pipe surface of the shell sleeve (2), and the screw holes on the end face of the flange A (101) are connected to the extruder. The thin end of the cone is the outlet end of the feed nozzle (1). The outlet end is threadedly connected to the threaded counterbore of the adapter block (3), and the threaded through hole at the center of the bottom surface of the threaded counterbore is threadedly connected to the head end of the serpentine pipe (4).

3. The novel mold for a wire mesh reinforced polyethylene composite pipe for water supply according to claim 1, characterized in that: The flange B (503) of the cover plate (5) is connected to the tail end face of the shell sleeve (2) by bolts. The outer end face of the cover plate (5) is threadedly connected to the flange C (601) of the outer mold pipe (6). The inner end face of the cover plate (5) is in contact with the limit disk (401) at the tail of the pipe body of the serpentine pipe (4), and the tail end of the serpentine pipe (4) is threadedly connected to the hollow shaft (501).

4. The novel mold for a wire mesh reinforced polyethylene composite pipe for water supply according to claim 1, characterized in that: The serpentine pipe (4) is located inside the electric heating solenoid (8). The tail end of the pipe orifice of the electric heating solenoid (8) is sleeved on the ring frame (504) of the inner end face of the cover plate (5). The wire harness at the head end of the electric heating solenoid (8) is connected to an external power supply through the external interface (201) on the pipe body of the shell sleeve (2).

5. The novel mold for a wire mesh reinforced polyethylene composite pipe for water supply according to claim 1, characterized in that: The serpentine pipe (4), the outer mold pipe (6), and the inner mold rod (7) have multiple models with different sizes, and the interfaces of each model are consistent.

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