Steel Skeleton Polyethylene Plastic Composite Pipe for Industrial Use

Abstract

The present invention belongs to the technical field of composite pipes, and particularly relates to a steel-skeleton polyethylene plastic composite pipe for industrial use. The present invention includes a steel pipe main body, and a polyethylene plastic pipe body is arranged inside the steel pipe main body, and the steel pipe main body is closely fitted with the polyethylene plastic pipe body. During the injection molding process of the polyethylene plastic pipe body, a steel pipe main body is directly sleeved outside the injection molded part to wrap the entire polyethylene plastic pipe body. Due to the change in the plastic shrinkage rate caused by the internal pressure, it is directly pressed against the steel plate, and the molten material will enter the anti-shrinkage connection assembly and be connected to the steel pipe main body to form a clamping effect. Therefore, the internal pressure of the pipe fitting can be guaranteed, the shrinkage phenomenon can be prevented, and the gap at the connection between the steel pipe main body and the polyethylene plastic pipe body can be reduced. The steel pipe main body is directly arranged inside the mold, and there is no need to remove the entire core (very large) from the injection molding machine to install the steel plate, which saves working hours and improves efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of composite pipes and relates to an industrial steel skeleton polyethylene plastic composite pipe. Background Art

[0002] At present, industrial steel skeleton polyethylene plastic composite pipe fittings are formed by plastic coating after punching steel plates to form pipe fittings with high internal pressure strength. However, due to the large difference in shrinkage rates between the steel plate and the plastic, there is a problem of gaps between the plastic and the steel plate after cooling, and when the steel plate is used for injection molding, the entire steel plate needs to be sleeved on the mold core pulling, wasting a lot of energy each time of injection molding. Therefore, it is very necessary to design an industrial steel skeleton polyethylene plastic composite pipe that can prevent shrinkage, reduce the gap at the connection between the steel plate pipe body and the polyethylene plastic pipe body, save working hours and improve efficiency.

[0003] In order to overcome the deficiencies of the prior art, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses a new type of steel wire mesh skeleton plastic composite pipe [Application No.: 201610336520.9], which is formed by connecting several sections of composite pipe components in sequence through electrofusion joints in a welded form to form an integral pipe. Each section of the composite pipe component is formed by two or more plastic pipes made of high-density polyethylene being wrapped around each other, and a steel wire mesh skeleton is arranged between adjacent two plastic pipes, and the steel wire mesh skeleton and the plastic pipe are bonded into one body through an adhesive layer. Summary of the Invention

[0004] The purpose of the present invention is to provide an industrial steel skeleton polyethylene plastic composite pipe for the above problems.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An industrial steel skeleton polyethylene plastic composite pipe includes a steel plate pipe body. A polyethylene plastic pipe body is arranged inside the steel plate pipe body. The steel plate pipe body and the polyethylene plastic pipe body are closely fitted. An anti-shrinkage connection assembly is arranged inside the steel plate pipe body, and the anti-shrinkage connection assembly corresponds to the position of the polyethylene plastic pipe body. An embedded anti-seismic member is further arranged inside the steel plate pipe body, and the embedded anti-seismic member and the anti-shrinkage connection assembly are arranged alternately.

[0007] In the above-mentioned industrial steel skeleton polyethylene plastic composite pipe, the anti-shrinkage connection assembly includes a plurality of anti-shrinkage melting material channels arranged inside the steel plate pipe body. The anti-shrinkage melting material channels are connected to the polyethylene plastic pipe body. A filling and sealing part is arranged at one end of the anti-shrinkage melting material channel far away from the polyethylene plastic pipe body, and the filling and sealing part is connected to the anti-shrinkage melting material channel.

[0008] In the above-mentioned industrial steel-skeleton polyethylene plastic composite pipe, the filling and sealing part includes a horizontally expanded sealing chamber arranged at one end of the anti-shrinkage melt channel away from the polyethylene plastic pipe body. The horizontally expanded sealing chamber is connected to the anti-shrinkage melt channel, and the center line of the horizontally expanded sealing chamber is perpendicular to the center line of the anti-shrinkage melt channel.

[0009] In the above-mentioned industrial steel-skeleton polyethylene plastic composite pipe, a connecting flared opening is provided on the side of the anti-shrinkage melt channel. The connecting flared opening is communicated with the anti-shrinkage melt channel, and the position of the connecting flared opening corresponds to that of the horizontally expanded sealing chamber.

[0010] In the above-mentioned industrial steel-skeleton polyethylene plastic composite pipe, the embedded anti-seismic member includes a plurality of hollow chambers arranged in the steel plate pipe main body. An anti-seismic support member is arranged in the hollow chamber, and the anti-seismic support member is in abutting cooperation with the steel plate pipe main body.

[0011] In the above-mentioned industrial steel-skeleton polyethylene plastic composite pipe, the anti-seismic support member includes a horizontally arranged carbon fiber composite support rod and a vertically arranged carbon fiber composite support rod in the hollow chamber. The horizontally arranged carbon fiber composite support rod and the vertically arranged carbon fiber composite support rod cooperate to form a cross-shaped support, and the horizontally arranged carbon fiber composite support rod and the vertically arranged carbon fiber composite support rod are respectively in abutting cooperation with the steel plate pipe main body.

[0012] In the above-mentioned industrial steel-skeleton polyethylene plastic composite pipe, a plurality of first support rod through holes are arranged in the horizontally arranged carbon fiber composite support rod, and a plurality of second support rod through holes are arranged in the vertically arranged carbon fiber composite support rod.

[0013] In the above-mentioned industrial steel-skeleton polyethylene plastic composite pipe, an auxiliary filling and connecting part is arranged in the steel plate pipe main body. The auxiliary filling and connecting part is arranged in a staggered manner with the anti-shrinkage melt channel, and a weight reduction part is arranged on the outer wall of the steel plate pipe main body.

[0014] In the above-mentioned industrial steel-skeleton polyethylene plastic composite pipe, the auxiliary filling and connecting part includes a plurality of auxiliary filling and connecting channels arranged in the steel plate pipe main body. One end of the auxiliary filling and connecting channel away from the polyethylene plastic pipe body is connected with a melt accumulation cavity, and the melt accumulation cavity is spherical.

[0015] In the above-mentioned industrial steel-skeleton polyethylene plastic composite pipe, the weight reduction part includes a plurality of weight reduction cavity channels arranged on the outer wall of the steel plate pipe main body. The plurality of weight reduction cavity channels are arranged in a circular array along the center point of the steel plate pipe main body.

[0016] Compared with the existing technology, the advantages of the present invention are as follows:

[0017] 1. During the injection molding process of the polyethylene plastic pipe body of the present invention, a steel pipe main body is directly sleeved outside the injection molded part to wrap the entire polyethylene plastic pipe body. During the molding process of the polyethylene plastic pipe body, due to the change in the plastic shrinkage rate caused by the internal pressure, it is directly pressed against the steel plate, and the molten material will enter the anti-shrinkage connection assembly and connect with the steel pipe main body to form a clamping effect. Therefore, the internal pressure of the pipe fitting can be guaranteed, the shrinkage phenomenon can be prevented, the gap at the connection between the steel pipe main body and the polyethylene plastic pipe body can be reduced, and the steel pipe main body is sleeved on the outermost side. Therefore, the steel pipe main body is directly arranged inside the mold, and there is no need to move the entire core (very large) out of the injection molding machine to install the steel plate, which saves working hours and improves efficiency. The embedded anti-seismic part can play an anti-seismic role for the steel pipe main body and the polyethylene plastic pipe body during use, and improves the service life.

[0018] 2. During the injection molding process of the present invention, the molten material will simultaneously enter the auxiliary filling connection channel and enter the molten material accumulation cavity to achieve the accumulation of the molten material and connect the steel pipe main body and the polyethylene plastic pipe body. The molten material accumulation cavity is spherical. After the molten material enters and cools, a tight connection between the steel pipe main body and the polyethylene plastic pipe body can be achieved, avoiding loosening and shaking.

[0019] Other advantages, objectives and features of the present invention will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the present invention. Brief Description of the Drawings

[0020] Figure 1 is the structural schematic diagram of the present invention.

[0021] Figure 2 is the structural schematic diagram of the steel pipe main body.

[0022] Figure 3 is the structural schematic diagram of the embedded anti-seismic part.

[0023] Figure 4 is the cross-sectional schematic diagram of the steel pipe main body.

[0024] In the figure: steel pipe main body 1, polyethylene plastic pipe body 2, anti-shrinkage connection assembly 3, embedded anti-seismic part 4, anti-shrinkage molten material channel 5, filling and sealing part 6, transverse expansion sealing chamber 7, connection flare 8, hollow chamber 9, anti-seismic support member 10, transverse carbon fiber composite support rod 11, longitudinal carbon fiber composite support rod 12, first support rod through hole 13, second support rod through hole 14, auxiliary filling connection part 15, weight reduction part 16, auxiliary filling connection channel 17, molten material accumulation cavity 18, weight reduction cavity channel 19. Detailed Embodiment

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] As Figures 1-4 shown, an industrial steel skeleton polyethylene plastic composite pipe includes a steel pipe main body 1. A polyethylene plastic pipe body 2 is provided inside the steel pipe main body 1. The steel pipe main body 1 and the polyethylene plastic pipe body 2 are closely fitted. An anti-shrinkage connection assembly 3 is provided inside the steel pipe main body 1. The anti-shrinkage connection assembly 3 corresponds to the position of the polyethylene plastic pipe body 2. An embedded anti-seismic member 4 is further provided inside the steel pipe main body 1. The embedded anti-seismic member 4 and the anti-shrinkage connection assembly 3 are arranged in an alternating manner.

[0027] In this embodiment, during the injection molding process of the polyethylene plastic pipe body 2, the steel pipe main body 1 is directly sleeved outside the injection molded part to form a wrap around the entire polyethylene plastic pipe body 2. During the molding process of the polyethylene plastic pipe body 2, due to the change in the plastic shrinkage rate caused by the internal pressure, it is directly pressed against the steel plate. The molten material will enter into the anti-shrinkage connection assembly 3 and be connected to the steel pipe main body 1 to form a clamping effect. Therefore, the internal pressure of the pipe fitting can be ensured, preventing shrinkage phenomena and reducing the gap at the connection between the steel pipe main body 1 and the polyethylene plastic pipe body 2. And since the steel pipe main body 1 is sleeved on the outermost side, the steel pipe main body 1 is directly arranged inside the mold, without the need to move the entire core (very large) out of the injection molding machine to install the steel plate, saving working hours and improving efficiency. The embedded anti-seismic member 4 can play an anti-seismic role for the steel pipe main body 1 and the polyethylene plastic pipe body 2 during use, improving the service life.

[0028] Combined with Figures 1-4 shown, the anti-shrinkage connection assembly 3 includes a plurality of anti-shrinkage molten material channels 5 provided inside the steel pipe main body 1. The anti-shrinkage molten material channels 5 are connected to the polyethylene plastic pipe body 2. A filling and sealing part 6 is provided at one end of the anti-shrinkage molten material channel 5 away from the polyethylene plastic pipe body 2. The filling and sealing part 6 is connected to the anti-shrinkage molten material channel 5.

[0029] Specifically, during the injection molding process of the polyethylene plastic pipe body 2, the steel pipe main body 1 is directly sleeved outside the injection molded part to form a wrap around the entire polyethylene plastic pipe body 2. During the molding process of the polyethylene plastic pipe body 2, due to the change in the plastic shrinkage rate caused by the internal pressure, it is directly pressed against the steel plate. The molten material will enter into the anti-shrinkage molten material channels 5 and enter into the filling and sealing part 6 to achieve sealing and filling, preventing shrinkage phenomena and reducing the gap at the connection between the steel pipe main body 1 and the polyethylene plastic pipe body 2, and being connected to the steel pipe main body 1 to form a clamping effect. Therefore, the internal pressure of the pipe fitting can be ensured. And since the steel pipe main body 1 is sleeved on the outermost side, the steel pipe main body 1 is directly arranged inside the mold, without the need to move the entire core (very large) out of the injection molding machine to install the steel plate, saving working hours and improving efficiency.

[0030] Combined with Figure 1 、 Figure 2As shown, the filling and sealing part 6 includes a laterally expanded sealing chamber 7 provided at one end of the anti-shrinkage melt channel 5 away from the polyethylene plastic pipe body 2. The laterally expanded sealing chamber 7 is connected to the anti-shrinkage melt channel 5, and the center line of the laterally expanded sealing chamber 7 is perpendicular to the center line of the anti-shrinkage melt channel 5.

[0031] In this embodiment, after the melt enters the laterally expanded sealing chamber 7 through the anti-shrinkage melt channel 5, sealing and filling are achieved, preventing shrinkage, reducing the gap at the connection between the steel pipe main body 1 and the polyethylene plastic pipe body 2, and connecting with the steel pipe main body 1 to form a clamping effect, so the internal pressure of the pipe fitting can be guaranteed.

[0032] A connecting flare 8 is provided on the side of the anti-shrinkage melt channel 5. The connecting flare 8 is communicated with the anti-shrinkage melt channel 5, and the position of the connecting flare 8 corresponds to that of the laterally expanded sealing chamber 7.

[0033] In this embodiment, the connecting flare 8 can further increase the opening size of the anti-shrinkage melt channel 5, increase a certain rate when the melt enters the anti-shrinkage melt channel 5, and reduce the gap at the connection.

[0034] Combined Figure 3 As shown, the embedded anti-seismic member 4 includes a plurality of hollow chambers 9 provided in the steel pipe main body 1. An anti-seismic support member 10 is provided in the hollow chamber 9, and the anti-seismic support member 10 is in abutting cooperation with the steel pipe main body 1.

[0035] In this embodiment, the hollow chamber 9 is used to install and fix the anti-seismic support member 10. The anti-seismic support member 10 can play a certain anti-seismic effect, improving the anti-impact ability and service life.

[0036] The anti-seismic support member 10 includes a transverse carbon fiber composite support rod 11 and a longitudinal carbon fiber composite support rod 12 provided in the hollow chamber 9. The transverse carbon fiber composite support rod 11 and the longitudinal carbon fiber composite support rod 12 cooperate to form a cross-shaped support, and the transverse carbon fiber composite support rod 11 and the longitudinal carbon fiber composite support rod 12 are respectively in abutting cooperation with the steel pipe main body 1.

[0037] In this embodiment, the transverse carbon fiber composite support rod 11 is used to play an anti-seismic role in the transverse direction, and the longitudinal carbon fiber composite support rod 12 is used to play an anti-seismic role in the longitudinal direction to achieve multi-directional anti-seismic. Both the transverse carbon fiber composite support rod 11 and the longitudinal carbon fiber composite support rod 12 are made of carbon fiber composite materials, which have the advantages of high tensile strength, low density, corrosion resistance, good durability and anti-seismic effect.

[0038] The described horizontal carbon fiber composite support rod 11 is provided with a number of first support rod through holes 13, and the described vertical carbon fiber composite support rod 12 is provided with a number of second support rod through holes 14.

[0039] In this embodiment, the first support rod through holes 13 and the second support rod through holes 14 are used to reduce the consumption of a certain amount of carbon fiber material and lower the cost.

[0040] Combined Figure 2 As shown, the steel pipe main body 1 is provided with an auxiliary filling connection part 15, the auxiliary filling connection part 15 is arranged in a staggered manner with the anti-shrinkage melt channel 5, and a weight reduction part 16 is arranged on the outer wall of the steel pipe main body 1.

[0041] In this embodiment, the auxiliary filling connection part 15 is used to assist in melt connection, realize multi-directional melt filling and sealing, reduce dead corners, and the weight reduction part 16 can play a role in reducing the weight of the steel pipe main body 1.

[0042] Combined Figure 1 、 Figure 2 As shown, the auxiliary filling connection part 15 includes a number of auxiliary filling connection channels 17 arranged in the steel pipe main body 1, one end of the auxiliary filling connection channel 17 far away from the polyethylene plastic pipe body 2 is connected with a melt accumulation cavity 18, and the melt accumulation cavity 18 is spherical.

[0043] In this embodiment, during the injection molding process, the melt will simultaneously enter the auxiliary filling connection channels 17 and enter the melt accumulation cavity 18, realizing melt accumulation and connecting the steel pipe main body 1 and the polyethylene plastic pipe body 2. The melt accumulation cavity 18 is spherical. After the melt enters and cools, a tight connection between the steel pipe main body 1 and the polyethylene plastic pipe body 2 can be realized, avoiding loosening and shaking.

[0044] Combined Figure 4 As shown, the weight reduction part 16 includes a number of weight reduction cavity channels 19 arranged on the outer wall of the steel pipe main body 1, and the number of weight reduction cavity channels 19 are arranged in a circular array along the center point of the steel pipe main body 1.

[0045] In this embodiment, the weight reduction cavity channels 19 can play a role in reducing the weight of the steel pipe main body 1.

[0046] The working principle of the present invention is:

[0047] During the injection molding process of the polyethylene plastic pipe body 2, a steel pipe main body 1 is directly sleeved outside the injection molded part to wrap the entire polyethylene plastic pipe body 2. During the molding process of the polyethylene plastic pipe body 2, due to the change in the plastic shrinkage rate caused by the internal pressure, it is directly pressed against the steel plate. The molten material will enter the anti-shrinkage molten material channel 5 and enter the transverse expansion sealing chamber 7 to achieve sealing filling, preventing shrinkage phenomena, reducing the gap at the connection between the steel pipe main body 1 and the polyethylene plastic pipe body 2, and connecting with the steel pipe main body 1 to form a clamping effect. Therefore, the internal pressure of the pipe fitting can be guaranteed, and the steel pipe main body 1 is sleeved on the outermost side. Therefore, the steel pipe main body 1 is directly arranged inside the mold, and there is no need to move the entire core (very large) out of the injection molding machine to install the steel plate, saving working hours and improving efficiency.

[0048] The connecting flared opening 8 can further increase the opening size of the anti-shrinkage molten material channel 5, increase a certain rate when the molten material enters the anti-shrinkage molten material channel 5, and can reduce the gap at the connection.

[0049] The hollow chamber 9 is used to install and fix the anti-seismic support member 10, and the anti-seismic support member 10 can play a certain anti-seismic effect, improving the anti-impact ability and service life.

[0050] The transverse carbon fiber composite strut 11 is used to play an anti-seismic role in the transverse direction, and the longitudinal carbon fiber composite strut 12 is used to play an anti-seismic role in the longitudinal direction to achieve multi-directional anti-seismic. Both the transverse carbon fiber composite strut 11 and the longitudinal carbon fiber composite strut 12 are made of carbon fiber composite materials, which have the advantages of high tensile strength, low density, corrosion resistance, good durability, and anti-seismic effect.

[0051] The first strut through hole 13 and the second strut through hole 14 are used to reduce the consumption of a certain amount of carbon fiber material and reduce costs.

[0052] During the injection molding process, the molten material will simultaneously enter the auxiliary filling connection channel 17 and enter the molten material accumulation cavity 18 to achieve molten material accumulation and connect the steel pipe main body 1 and the polyethylene plastic pipe body 2. The molten material accumulation cavity 18 is spherical. After the molten material enters and cools, it can achieve a tight connection between the steel pipe main body 1 and the polyethylene plastic pipe body 2, avoiding loosening and shaking.

[0053] The weight reduction cavity channel 19 can play a role in reducing the weight of the steel pipe main body 1.

[0054] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention.

[0055] Although terms such as steel pipe main body 1, polyethylene plastic pipe body 2, anti-shrinkage connection component 3, embedded seismic component 4, anti-shrinkage melt channel 5, filling and sealing part 6, laterally expanding sealing chamber 7, connecting flared opening 8, hollow chamber 9, seismic support member 10, laterally carbon fiber composite support rod 11, longitudinally carbon fiber composite support rod 12, first support rod through hole 13, second support rod through hole 14, auxiliary filling and connecting part 15, weight reduction part 16, auxiliary filling and connecting channel 17, melt accumulation cavity 18, weight reduction cavity channel 19 are used more frequently in this text, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention, and interpreting them as any kind of additional limitation is contrary to the spirit of the present invention.

Claims

1. An industrial steel skeleton polyethylene plastic composite pipe, comprising a steel pipe main body (1), characterized in that, The steel pipe main body (1) is internally provided with a polyethylene plastic pipe body (2). The steel pipe main body (1) is closely fitted with the polyethylene plastic pipe body (2). The steel pipe main body (1) is internally provided with a shrinkage prevention connection assembly (3). The shrinkage prevention connection assembly (3) corresponds to the position of the polyethylene plastic pipe body (2). The steel pipe main body (1) is also internally provided with an embedded anti-seismic member (4). The embedded anti-seismic member (4) is arranged staggeredly with the shrinkage prevention connection assembly (3). The shrinkage prevention connection assembly (3) includes a plurality of shrinkage prevention melt channels (5) arranged in the steel pipe main body (1). The shrinkage prevention melt channels (5) are connected to the polyethylene plastic pipe body (2). One end of the shrinkage prevention melt channel (5) far from the polyethylene plastic pipe body (2) is provided with a filling and sealing part (6). The filling and sealing part (6) is connected to the shrinkage prevention melt channel (5). The filling and sealing part (6) includes a transverse expansion sealing chamber (7) arranged at one end of the shrinkage prevention melt channel (5) far from the polyethylene plastic pipe body (2). The transverse expansion sealing chamber (7) is connected to the shrinkage prevention melt channel (5). The center line of the transverse expansion sealing chamber (7) is perpendicular to the center line of the shrinkage prevention melt channel (5). A connection flaring (8) is arranged on the side of the shrinkage prevention melt channel (5). The connection flaring (8) is communicated with the shrinkage prevention melt channel (5). The connection flaring (8) corresponds to the position of the transverse expansion sealing chamber (7). The embedded anti-seismic member (4) includes a plurality of hollow chambers (9) arranged in the steel pipe main body (1). An anti-seismic support member (10) is arranged in the hollow chamber (9). The anti-seismic support member (10) is in abutting fit with the steel pipe main body (1). The anti-seismic support member (10) includes a transverse carbon fiber composite support rod (11) and a longitudinal carbon fiber composite support rod (12) arranged in the hollow chamber (9). The transverse carbon fiber composite support rod (11) and the longitudinal carbon fiber composite support rod (12) cooperate to form a cross support shape. The transverse carbon fiber composite support rod (11) and the longitudinal carbon fiber composite support rod (12) are respectively in abutting fit with the steel pipe main body (1).

2. The industrial steel-skeleton polyethylene plastic composite pipe according to claim 1, wherein A plurality of first support rod through holes (13) are arranged in the transverse carbon fiber composite support rod (11). A plurality of second support rod through holes (14) are arranged in the longitudinal carbon fiber composite support rod (12).

3. The industrial steel skeleton polyethylene plastic composite pipe according to claim 2, wherein, An auxiliary filling and connection part (15) is arranged in the steel pipe main body (1). The auxiliary filling and connection part (15) is arranged staggeredly with the shrinkage prevention melt channel (5). A weight reduction part (16) is arranged on the outer wall of the steel pipe main body (1).

4. The industrial steel skeleton polyethylene plastic composite pipe according to claim 3, wherein The auxiliary filling and connection part (15) includes a plurality of auxiliary filling and connection channels (17) arranged in the steel pipe main body (1). One end of the auxiliary filling and connection channel (17) far from the polyethylene plastic pipe body (2) is connected with a melt accumulation cavity (18). The melt accumulation cavity (18) is spherical in shape.

5. The industrial steel skeleton polyethylene plastic composite pipe according to claim 3, characterized in that, The described weight reduction part (16) includes a plurality of weight reduction channels (19) arranged on the outer wall of the steel pipe body (1), and the plurality of weight reduction channels (19) are distributed in an annular array along the center point of the steel pipe body (1).

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