Winding structure wall type MPP polypropylene pipe

Abstract

The utility model relates to the technical field of pipes, and discloses a winding structure wall type MPP pipe which comprises a pipe body, a connecting plug is fixedly arranged at one end of the pipe body, a socket pipe is arranged on the outer side wall of the other end of the pipe body in a sleeved mode, a connecting ring is fixedly arranged at the end, close to the connecting plug, of the socket pipe, and the connecting ring is fixed on the outer side wall of the pipe body. The inner side wall of the socket pipe, the outer side wall of the pipeline body and one side of the connecting ring jointly define an annular groove allowing a connecting plug of another pipeline body to be inserted in, a heating element is embedded in the inner side wall of the socket pipe in the circumferential direction, and a first sealing assembly is arranged at the position, at the annular groove, of the outer side wall of the pipeline body. An avoiding part is arranged at the end of the connecting plug, and a second sealing assembly abutting against the first sealing assembly in a sealed mode is arranged on the side wall of the avoiding part. The connecting device has the effects that the connecting sealing performance of two pipe connectors is good, and leakage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of pipe technology, and in particular to a spiral wound structure wall type MPP polypropylene pipe. Background Technology

[0002] Polypropylene is a semi-crystalline thermoplastic polymer made from propylene monomers through an addition polymerization reaction. It is typically a white, waxy solid, non-toxic, odorless, transparent, and lightweight. Polypropylene (PP) spiral wound pipes are lightweight, easy to install, and use electrofusion joints for pipe connections. They offer strong axial tensile strength, and the connection technology is mature and reliable. They are widely used in urban water supply, urban gas supply, and farmland irrigation.

[0003] Currently, some PP spiral wound structured wall pipes on the market use a socket-type electrofusion connection method. Specifically, a socket tube is installed at one end of the PP spiral wound structured wall pipe, and a plug is installed at the other end. The inner diameter of the socket tube is the same as the outer diameter of the plug. A heating element is embedded circumferentially on the inner wall of the socket tube. During connection, the heating element melts to achieve a seal. However, since the main structure of the pipe is not perfect, it has been found in actual use that due to the high water pressure inside the pipe, the water pressure will cause great compression on the inner surface of the wall pipe. In addition, long-term corrosion of the water source will cause the wall pipe to thin, resulting in leakage at the connection between two PP spiral wound structured wall pipes. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a spiral wound structure wall type MPP polypropylene pipe, which makes the connection between the two pipes well sealed and prevents leakage.

[0005] This utility model solves the above-mentioned technical problems through the following technical means:

[0006] A spiral wound structure wall type MPP polypropylene pipe includes a pipe body, a plug is fixedly provided at one end of the pipe body, and a socket tube is sleeved on the outer side wall of the other end. A connecting ring is fixedly provided at the end of the socket tube near the plug, and the connecting ring is fixed on the outer side wall of the pipe body. The inner side wall of the socket tube, the outer side wall of the pipe body, and one side of the connecting ring together form an annular groove for the insertion of a plug of another pipe body. A heating element is embedded in the inner side wall of the socket tube in the circumferential direction. A first sealing component is provided at the position of the annular groove on the outer side wall of the pipe body. An avoidance part is provided at the end of the plug, and a second sealing component is provided on the side wall of the avoidance part to seal against the first sealing component.

[0007] By setting up the above structure, the connector of one pipe is inserted into the annular groove of another pipe. When the heating element is energized, the two pipes melt together, completing the connection between the two pipes. At the same time, the two pipes melt together to form a seal. Meanwhile, the second sealing component and the first sealing component are tightly pressed together in the narrow annular groove space, further increasing the sealing performance of the connection between the two pipes and preventing leakage.

[0008] Furthermore, the first sealing assembly includes a rubber sleeve and an arc-shaped mounting rod. The rubber sleeve is fixedly fitted onto the outer wall of the pipe body. A channel for the insertion joint to pass through is reserved between the edge of the rubber sleeve and the inner wall of the socket tube. Several arc-shaped mounting rods are evenly arranged along the circumference of the pipe body. One end of the arc-shaped mounting rod is fixedly connected to the outer wall of the pipe body, and the other end passes through the edge of the rubber sleeve. The rubber sleeve and the arc-shaped mounting rod are slidably engaged.

[0009] By setting the above structure, the inner side of the rubber sleeve is fixedly installed on the outer wall of the pipe body, and the two form a sealed connection. The edge of the rubber sleeve can be bent under the guidance of the arc-shaped mounting rod, and the outer side of the rubber sleeve is used to cooperate with the second sealing component.

[0010] Furthermore, a spring is fitted onto the surface of the arc-shaped mounting rod, with one end of the spring fixedly connected to the outer wall of the pipe body and the other end fixedly connected to one side of the rubber sleeve.

[0011] By setting the above structure, the spring makes the rubber sleeve tend to stay flat and fit on the pipe body. When the edge of the rubber sleeve is squeezed, the edge of the rubber sleeve bends and deforms under the guidance of the arc-shaped mounting rod. The spring applies an elastic force to the rubber sleeve, so that the rubber sleeve and the second sealing component can fit tightly together, thus enhancing the sealing effect.

[0012] Furthermore, the second sealing assembly includes a first annular protrusion and a second annular protrusion, which are spaced apart on the side wall of the clearance portion of the connector. Both the first and second annular protrusions are barbed. When the connector is fully inserted into the annular groove, the rubber sleeve is located between the two annular protrusions, and the two sides of the rubber sleeve are respectively used to form a compression seal with the two annular protrusions.

[0013] By setting the above structure, when the connector is inserted into the annular groove, the first annular protrusion at the front end squeezes the edge of the rubber sleeve, causing the rubber sleeve to bend and deform. When the connector reaches the innermost end of the annular groove, the first annular protrusion can just pass over the rubber sleeve. Under its own elasticity and the action of the spring, the rubber sleeve has the tendency to return to its initial shape. At this time, the second annular protrusion just abuts against the rubber sleeve to form a seal.

[0014] Furthermore, a sealing ring is provided on the outer wall of the connector.

[0015] By setting the above structure, the sealing performance of the connection between the outer wall of the connector and the socket tube is increased.

[0016] Furthermore, the inner diameter of the connector is larger than the outer diameter of the pipe body, a rubber layer is provided on the inner side wall of the connector, and the connector and one end of the pipe body are interference fit.

[0017] By setting the above structure, when the plug is inserted into the annular groove, the plug is fitted onto one end of the pipe body by an interference fit, and the rubber layer directly contacts the outer wall of the pipe body, further enhancing the sealing performance of the connection between the two spiral-wound MPP polypropylene pipes.

[0018] The beneficial effects of this utility model are as follows: by inserting the connector of one pipe into the annular groove of another pipe and energizing the heating element, the two pipes melt together, completing the installation and connection of the two pipes. At the same time, the melting area of ​​the two pipes also forms a seal. The second sealing component and the first sealing component are tightly pressed together in the narrow annular groove space, further increasing the connection and sealing of the two pipes, so that no leakage occurs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the connection structure of two pipes in a wound-structure wall type MPP polypropylene pipe according to this utility model.

[0020] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure.

[0021] Figure 3 yes Figure 2 A magnified structural diagram of point A in the middle.

[0022] Figure 4 yes Figure 3 A magnified structural diagram at point B in the middle.

[0023] Figure 5 This is a cross-sectional structural diagram of the socket tube in this utility model.

[0024] Figure 6 yes Figure 5 A magnified structural diagram at point C.

[0025] Figure 7 yes Figure 5 A structural diagram from another perspective.

[0026] Figure 8 This is a schematic diagram of the connection structure of the first protrusion, the second protrusion, and the rubber sleeve in this utility model.

[0027] in,

[0028] 1. Pipe body; 2. Connector; 3. Socket; 4. Connecting ring; 5. Annular groove; 6. Clearance part; 7. Rubber sleeve; 8. Arc-shaped mounting rod; 9. Limiting ring; 10. First annular protrusion; 11. Second annular protrusion; 12. Sealing ring; 13. Rubber layer; 14. Reinforcing rod; 15. Spring. Detailed Implementation

[0029] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and represent schematic diagrams, not actual pictures. They should not be construed as limiting the utility model. To better illustrate the embodiments of this utility model, some components in the figures may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the figures for those skilled in the art.

[0030] In the figures of this utility model embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe the positional relationship in the figure are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0031] like Figure 1-8As shown, this utility model discloses a spiral wound structure wall type MPP polypropylene pipe, including a pipe body 1. One end of the pipe body 1 is fixedly provided with a plug 2, and the outer wall of the other end is fitted with a socket tube 3. The end of the socket tube 3 near the plug 2 is fixedly provided with a connecting ring 4. The connecting ring 4 is fixed on the outer wall of the pipe body 1. The inner wall of the socket tube 3, the outer wall of the pipe body 1, and one side of the connecting ring 4 together form an annular groove 5 for the plug 2 of another pipe body 1 to be inserted. The inner wall of the socket tube 3 is embedded with a heating element (not shown in the figure) in the circumferential direction. In this embodiment, the heating element adopts the existing electric heating wire. When the plug 2 of one pipe is inserted into the annular groove 5 of another pipe, the connection of the two pipes is completed by energizing the electric heating wire and the heat melts the connection. At the same time, the heat melt connection between the two pipes forms a seal. A first sealing component is provided on the outer wall of the main pipe 1 at the position of the annular groove 5. A clearance part 6 is provided at the end of the plug 2. A second sealing component is provided on the side wall of the clearance part 6 to seal against the first sealing component. In this embodiment, by providing the clearance part 6, interference between the plug 2 and the first sealing component is avoided. At the same time, it is also convenient to provide the second sealing component. The second sealing component can be sealed in the narrow space of the annular groove 5, which can further increase the sealing performance of the connection between the two pipes and prevent leakage.

[0032] The first sealing assembly includes a rubber sleeve 7 and an arc-shaped mounting rod 8. The rubber sleeve 7 is fixedly fitted onto the outer wall of the pipe body 1, and the inner side of the rubber sleeve 7 forms a seal with the pipe body 1. The edge of the rubber sleeve 7 does not contact the inner wall of the socket pipe 3 and has a reserved channel for the side wall of the clearance part 6 of the connector 2 to pass through. Four arc-shaped mounting rods 8 are evenly arranged around the circumference of the pipe body 1. One end of the arc-shaped mounting rod 8 near the connecting ring 4 is fixedly connected to the outer wall of the pipe body 1, and the other end passes through the edge of the rubber sleeve 7 to form a suspended end. The rubber sleeve 7 and the arc-shaped mounting rod 8 are in sliding fit. A limiting ring 9 is fixedly provided at the suspended end of the arc-shaped mounting rod 8 to prevent the edge of the rubber sleeve 7 from detaching from the arc-shaped mounting rod 8 during installation. A spring 15 is fitted on the surface of the arc-shaped mounting rod 8. One end of the spring 15 is fixedly connected to the outer wall of the pipe body 1, and the other end is fixedly connected to one side of the rubber sleeve 7. The second sealing assembly includes a first annular protrusion 10 and a second annular protrusion 11. The first annular protrusion 10 and the second annular protrusion 11 are spaced apart on the side wall of the clearance portion 6 of the connector 2. Both the first annular protrusion 10 and the second annular protrusion 11 are barbed. The first annular protrusion 10 is located at the inner end of the annular groove 5. When the connector 2 is fully inserted into the annular groove 5, the rubber sleeve 7 is located between the two annular protrusions. The two sides of the rubber sleeve 7 are respectively used to form a compression seal with the two annular protrusions.

[0033] In this embodiment, when the connector 2 is inserted into the annular groove 5, the side wall of the clearance part 6 passes through the space between the edge of the rubber sleeve 7 and the inner wall of the socket tube 3. During the insertion process, the side wall of the clearance part 6 does not contact the edge of the rubber sleeve 7. The first annular protrusion 10 first contacts and squeezes the rubber sleeve 7. The edge of the rubber sleeve 7 bends and deforms towards the inner end of the annular groove 5. When the connector 2 is inserted to the bottom, the first annular protrusion 10 just passes over the rubber sleeve 7. The rubber sleeve 7 has a tendency to return to its initial shape under its own elasticity and the action of the spring 15. However, at this time, the second annular protrusion 11 just blocks the rubber sleeve 7, and the rubber sleeve 7 forms a tight seal with the second annular protrusion. When the pipe is subjected to a large water pressure, the water pressure will cause great compression to the inner surface of the pipe wall. Under such circumstances, the rubber sleeve 7 may be forced to continue to bend into the annular groove 5. The rubber sleeve 7 and the first annular protrusion 10 form a tight seal. That is to say, the rubber sleeve 7 located between the two annular protrusions will be tightly sealed with at least one annular protrusion, whether it bends to the left or returns to the right, so that the connection between the two pipes is well sealed.

[0034] The outer wall of the connector 2 is provided with an elastic sealing ring 12, which abuts against the inner wall of the socket tube 3 to seal when the connector 2 is inserted into the annular groove 5.

[0035] The inner diameter of the plug 2 is larger than the outer diameter of the pipe body 1. A rubber layer 13 is provided on the inner wall of the plug 2. The plug 2 and one end of the pipe body 1 are interference-fitted. When the plug 2 is inserted into the annular groove 5, it fits onto one end of the pipe body 1 through the interference fit, and the rubber layer 13 directly contacts the outer wall of the pipe body 1, further enhancing the sealing performance of the connection between the two spiral-wound MPP polypropylene pipes. In this embodiment, both the end of the socket 3 and the end of the plug 2 can be designed with rounded corners to facilitate smoother insertion of the plug 2 into the annular groove 5 and improve work efficiency.

[0036] In the above embodiments, the pipe body 1 is designed as a multi-layer structure, and the multi-layer structure is designed to be asymmetrically distributed. The pipe body 1 includes an inner layer, a middle structural layer, and an outer layer from the inside out. The inner layer and the outer layer are respectively made of low melt index random copolymer polypropylene and high temperature resistant copolymer polypropylene. Copolymer polypropylene has a high elastic modulus, which improves ring stiffness. The two materials are used to enhance the ring stiffness of the product and support the pipe wall structure, respectively. The middle structural layer of the pipe wall adopts a secret formula technology of MBS resin, SRC-LC low temperature impact agent, and appropriate amount of ultrafine calcium carbonate to improve ring stiffness. The pipe wall exhibits high strength and optimized temperature resistance and seismic performance. A reinforcing structure, such as reinforcing rods 14, can be installed in the middle of the intermediate structural layer. Several axial mounting holes for inserting the reinforcing rods 14 are evenly distributed circumferentially in the middle of the intermediate structural layer. The reinforcing rods 14 are fixedly connected to the inner wall of the intermediate structural layer. Alternatively, the reinforcing structure can be a biomimetic honeycomb mesh reinforcing rib (such as a hexagonal honeycomb structure) embedded within the intermediate structural layer. The material used is glass fiber reinforced polypropylene, which can be co-extruded with the winding layer to achieve high strength and lightweight. Sound-absorbing material can be filled into the mesh pores to reduce water transmission noise. A wear-resistant layer, made of rubber, is fixedly connected to the outer wall of the pipe body 1. The wear-resistant layer contains a polypropylene flat strip, and the wear-resistant layer and the polypropylene flat strip are spirally wound around the outer wall of the pipe body 1. This embodiment adopts domestically leading multi-layer structure mutual wrapping and winding technology to increase the multi-layer structure composite reinforced structural wall pipe, thereby improving the strength and rigidity of the pipe. The resulting large-diameter polypropylene wound structural wall pipe product has high comprehensive performance, with advantages such as higher ring stiffness and tensile strength than ordinary pipes, light product weight, convenient construction, strong joint tensile strength, and no leakage.

[0037] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.

Claims

1. A spiral wound structure wall type MPP polypropylene pipe, characterized in that: The device includes a pipe body, one end of which is fixedly equipped with a plug, and the outer wall of the other end is fitted with a socket tube. The end of the socket tube near the plug is fixedly equipped with a connecting ring, which is fixed to the outer wall of the pipe body. The inner wall of the socket tube, the outer wall of the pipe body, and one side of the connecting ring together form an annular groove for the insertion of a plug of another pipe body. The inner wall of the socket tube is embedded with a heating element in the circumferential direction. The outer wall of the pipe body is provided with a first sealing component at the position of the annular groove. The end of the plug is provided with a clearance part, and the side wall of the clearance part is provided with a second sealing component that seals against the first sealing component.

2. The spiral wound structure wall type MPP polypropylene pipe according to claim 1, characterized in that: The first sealing assembly includes a rubber sleeve and an arc-shaped mounting rod. The rubber sleeve is fixedly fitted onto the outer wall of the pipe body. A channel for the insertion joint to pass through is reserved between the edge of the rubber sleeve and the inner wall of the socket pipe. Several arc-shaped mounting rods are evenly arranged along the circumference of the pipe body. One end of the arc-shaped mounting rod is fixedly connected to the outer wall of the pipe body, and the other end passes through the edge of the rubber sleeve. The rubber sleeve and the arc-shaped mounting rod are slidably engaged.

3. The spiral wound structure wall type MPP polypropylene pipe according to claim 2, characterized in that: A spring is fitted onto the surface of the arc-shaped mounting rod. One end of the spring is fixedly connected to the outer wall of the pipe body, and the other end is fixedly connected to one side of the rubber sleeve.

4. The spiral wound structure wall type MPP polypropylene pipe according to claim 2, characterized in that: The second sealing assembly includes a first annular protrusion and a second annular protrusion. The first annular protrusion and the second annular protrusion are spaced apart on the side wall of the clearance portion of the connector. Both the first annular protrusion and the second annular protrusion are barbed. When the connector is fully inserted into the annular groove, the rubber sleeve is located between the two annular protrusions. The two sides of the rubber sleeve are respectively used to form a compression seal with the two annular protrusions.

5. The spiral wound structure wall type MPP polypropylene pipe according to claim 1, characterized in that: A sealing ring is provided on the outer wall of the connector.

6. The spiral wound structure wall type MPP polypropylene pipe according to claim 1, characterized in that: The inner diameter of the connector is larger than the outer diameter of the pipe body, and a rubber layer is provided on the inner side wall of the connector. The connector and one end of the pipe body are interference fit.

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