CN111878637A - A kind of HDPE pipe rigid embedded parts connecting assembly - Google Patents

Abstract

The invention provides a connection component of a rigid embedded part of an HDPE pipe, which belongs to the technical field of pipe fittings. The HDPE pipe rigid embedded parts connection assembly includes embedded parts and expansion joints, the embedded parts and the expansion joints are connected by pipeline connectors, and the embedded parts are connected to the pipeline connectors through electrofusion clamps The lower end of the pipe connector is inserted into the expansion joint, the embedded part includes a cylindrical body, the inner part of the body is provided with an annular metal sleeve, and the upper end of the expansion joint is a horn. The outer wall of the third nozzle is provided with an external thread, the external thread is externally connected with a pipe cover, and a sealing ring is arranged between the expansion joint and the pipe connecting piece. By adding annular metal sleeves and expansion joints in the present invention, the rigid embedded parts of the HDPE pipe will not shrink in the circumferential direction when passing through the floor, but have a moderate compensation space when axial shrinkage occurs.

Description

A kind of HDPE pipe rigid embedded parts connecting assembly

technical field

The invention belongs to the technical field of pipe fittings, and relates to an HDPE pipe, in particular to a connection component of a rigid embedded part of an HDPE pipe.

Background technique

In the existing building drainage system, the main drainage pipes are PVC drainage pipes and cast iron drainage pipes. Advantages of PVC pipe: 1. Corrosion resistance, 2. Easy installation, 3. Low cost; the disadvantage is that chlorine gas will be generated during production, the pressure bearing and impact resistance performance is poor, the service life is short, and the noise reduction performance is not ideal. The advantages of cast iron drainage pipes are: 1. Impact resistance, 2. Good mute effect; disadvantages are poor corrosion resistance, large production pollution and high cost.

When the PVC pipes are installed between the floors, the domestic sewage from the upper floors tends to have a larger sound of water flow when the domestic sewage flows to the lower floors. Moreover, due to the general application of the bedroom interior, the sound of the water flow is relatively large in relatively quiet nights. Not good for people's sleep. In the indoor drainage system, the high-density polyethylene (HDPE) silent drainage pipe is a new type of construction pipe in the modern construction industry. Because the material of the HDPE pipe is flexible and elastic, it has the performance of bearing pressure and impact resistance, and is corrosion-resistant and durable. Effectively mute; the service life of HDPE pipes is more than 50 years, and the comprehensive cost is low; HDPE pipes can be recycled and reused, which has extremely high environmental protection and economic value. Therefore, the application of HDPE pipes in modern buildings has become more and more extensive.

Due to the temperature difference between day and night and the changes in spring, summer, autumn and winter, the HDPE pipe will expand and contract with heat, and because the thermal expansion coefficient of the HDPE pipe is much larger than that of the concrete, cracks will appear between the pipe and the floor, and the increase of cracks will undoubtedly increase. Causes water leaks between floors.

When HDPE pipes are used in the building drainage system, they will pass through different parts such as floors, roofs, and basement exterior walls. Due to temperature changes, the pipes will shrink in the circumferential direction, which can easily cause leakage. Therefore, corresponding measures are required. In order to prevent the leakage between the pipeline and the floor caused by the change of temperature difference; also, the pipeline will also shrink axially, which can easily cause the bending deformation of the pipeline. Therefore, corresponding measures are also required to prevent the deformation of the pipeline caused by the change of temperature difference. .

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the above problems in the existing technology, and propose a rigid embedded part connection assembly for HDPE pipes. The technical problem to be solved by the present invention is that the embedded parts produce circumferential shrinkage and axial Shrinkage causes the problem of water seepage in the floor.

The purpose of the present invention can be achieved by the following technical solutions: a rigid embedded part connection assembly of HDPE pipe, comprising embedded parts and expansion joints, the embedded parts and expansion joints are connected by pipeline connecting parts, and its characteristics are: The said embedded part is connected with the upper end of the pipeline connector through the electrofusion clamp, the lower end of the said pipeline connector is inserted into the expansion joint, the said embedded part comprises a cylindrical body, and the said body The upper end of the main body is a cylindrical first nozzle, the lower end of the main body is a cylindrical second nozzle, the inside of the main body is provided with an annular metal sleeve, and the outer side of the main body is sequentially connected with the first nozzle from top to bottom. The annular water blocking ring, the second annular water blocking ring and the annular fixing seat, the upper end of the expansion joint is a trumpet-shaped third nozzle, the lower end of the expansion joint is a cylindrical fourth nozzle, the third The outer wall of the nozzle is provided with an external thread, the external thread is externally connected with a pipe cover, and a sealing ring is arranged between the expansion joint and the pipe connecting piece.

This HDPE pipe rigid embedded part connection component, due to the change of ambient temperature, the embedded part will expand and contract due to thermal expansion, resulting in the shrinkage of the embedded part in its circumferential direction, and a gap between the embedded part and the floor, and finally the floor will seep through. Setting an annular metal sleeve inside the body of the embedded part can reduce the deformation of the embedded part due to changes in ambient temperature, so that the deformation of the embedded part basically disappears; the first annular water blocking ring and the second annular water blocking ring It can prolong the flow path of water seepage in the floor and increase the distance of water seepage; the annular fixed seat can increase the occlusal force between the embedded parts and the floor, and make the connection of the embedded parts in the floor more stable. Similarly, due to changes in ambient temperature, the embedded parts will expand and contract due to thermal expansion, causing the embedded parts to shrink in their axial direction, and the embedded parts will deform the pipe connectors or deform the HDPE pipe. The lower end of the connecting piece is provided with an expansion joint, which can make the pipe connecting piece and the HDPE pipe produce an appropriate amount of displacement in the axial direction, which is used to compensate the shrinkage and deformation of the pipeline due to temperature changes, and better protect the HDPE pipe and the pipe connecting piece. At the same time, it will not cause cracks in the floor due to stress.

In the above-mentioned HDPE pipe rigid embedded part connection assembly, a plurality of connecting ribs are fixed on the annular fixing seat along the circumferential direction thereof, and the cross-section of the connecting ribs is in a triangular shape. The connecting rib can increase the contact area between the embedded part and the floor slab, thereby improving the occlusal force between the embedded part and the floor slab.

In the above-mentioned HDPE pipe rigid embedded part connection assembly, the annular fixed seat is provided with a plurality of installation holes at equal distances, and the installation holes are provided with internal threads. Bolts, pins and other connectors can be installed in the installation holes, and when they are in contact with the concrete in the floor slab, the occlusal force between the embedded parts and the floor slab can be improved.

In the above-mentioned HDPE pipe rigid embedded part connection assembly, an annular groove is formed on the outer wall of the fourth nozzle, and the annular groove is provided with a pipe clip capable of fixing the expansion joint to the wall. The pipe clamp is fixed on the wall. Since the pipe clamp is set in the annular groove on the expansion joint, the expansion joint is fixed on the wall, and the movement of the expansion joint with the HDPE pipe and the pipe connection is avoided.

In the above-mentioned HDPE pipe rigid embedded part connection assembly, a limit rib that can limit the up and down movement of the pipe clip is provided below the annular groove. The limit rib prevents the expansion joint from moving downwards.

In the above-mentioned HDPE pipe rigid embedded part connection assembly, the inner wall of the main body has inclined flow guide ribs. The guide ribs can make the sewage in the pipeline flow in a spiral direction along the pipe wall of the embedded part, so as to make the water flow stably.

In the above-mentioned HDPE pipe rigid embedded part connection assembly, the flow guide rib is integrally formed with the body by means of injection molding.

In the above-mentioned HDPE pipe rigid embedded part connection assembly, the material of the annular metal sleeve is a stainless steel sleeve, a galvanized steel pipe sleeve or an iron pipe sleeve. Stainless steel sleeves, galvanized steel pipe sleeves or iron sleeves all have the advantage of small thermal expansion coefficients, and their deformation is very small under the influence of normal ambient temperature. When they are injected into the embedded parts, the deformation of the embedded parts can be suppressed.

In the above-mentioned HDPE pipe rigid embedded part connection assembly, the annular metal sleeve is integrally formed with the body by means of injection molding.

In the above-mentioned HDPE pipe rigid embedded part connection assembly, the outer diameter of the first annular water blocking ring is equal to the outer diameter of the second annular water blocking ring, and the outer diameter of the annular fixing seat is larger than that of the second annular water blocking ring. The outer diameter of the hydrosphere.

Compared with the prior art, the present invention has the following advantages:

1. In the present invention, an annular metal sleeve is injected into the body. Since the annular metal sleeve has the advantage of a small thermal expansion coefficient, its deformation is very small under the influence of normal ambient temperature. When it is injected into the embedded part, the embedded part can be suppressed. When the embedded part is deformed and the embedded part is embedded in the floor slab, the embedded part will not be squeezed when connecting with the floor, so as to ensure that there will be no gap between the two, resulting in water seepage.

2. In the present invention, an expansion joint is arranged at the lower end of the pipeline connecting piece. The change of the ambient temperature will cause the embedded piece to undergo thermal expansion and contraction, causing the embedded piece to shrink in its axial direction. The setting of the expansion joint can make the pipeline connection. The parts and the HDPE pipe can produce an appropriate amount of displacement in the axial direction, which is used to compensate the shrinkage and deformation of the pipeline due to temperature changes, better protect the HDPE pipe and the pipe connecting parts, and at the same time, it will not cause cracks in the floor due to stress. .

3. In the present invention, the expansion joint can be fixed on the wall by arranging the pipe clamp and the limiting rib, which avoids the expansion and contraction of the expansion joint with the thermal expansion and contraction of the HDPE pipe and the pipe connecting piece.

4. Since the present invention is made of high-density polyethylene material, the flexible sound-absorbing performance of the material itself is obtained, so that the water flow in the pipeline will not make sound outside, so as to keep quiet and not disturb people.

5. Compared with the traditional PVC drainage system, because the HDPE material itself has recyclable environmental protection performance, it has extremely high environmental protection and economic value, and is also the application direction of the drainage pipeline system in the future, and the service life of the HDPE material is more than 50 years. It has the advantages of low comprehensive cost, long service life and wide range; compared with cast iron drainage system, it has the advantages of corrosion resistance and cost saving.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the structural representation of the embedded part in the present invention;

Fig. 3 is the sectional structure schematic diagram of the embedded part in the present invention;

Fig. 4 is the structural representation of expansion joint in the present invention;

FIG. 5 is a schematic cross-sectional structural diagram of an expansion joint in the present invention.

In the figure, 1, embedded part; 101, the first nozzle; 102, the second nozzle; 103, the connecting rib; 104, the installation hole; 2, the annular metal sleeve; 3, the first annular water blocking ring; 4, The second annular water blocking ring; 5. The annular fixed seat; 6. The expansion joint; 601, The third nozzle; 602, The fourth nozzle; 603, The annular groove; , sealing ring; 9, pipe clamp; 10, pipe connector; 11, electrofusion clamp.

Detailed ways

The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

As shown in Figures 1-5, a rigid embedded part connection assembly for HDPE pipes includes embedded parts 1 and expansion joints 6. The embedded parts 1 and the expansion joints 6 are connected by a pipeline connector 10. The embedded parts 1 The electrofusion clamp 11 is connected to the upper end of the pipe connector 10 , the lower end of the pipe connector 10 is inserted into the expansion joint 6 , the upper end of the embedded part 1 can be connected with HDPE pipe, and the lower end of the expansion joint 6 can be connected with HDPE pipe , Here, the connection of the HDPE pipe is preferably connected by the electrofusion clamp 11 .

As shown in Figures 1, 2 and 3, the embedded part 1 comprises a cylindrical body, the upper end of the body is a cylindrical first nozzle 101, the lower end of the body is a cylindrical second nozzle 102, the body An annular metal sleeve 2 is arranged inside the body, and the outer side of the body is sequentially connected with a first annular water blocking ring 3, a second annular water blocking ring 4 and an annular fixing seat 5 from top to bottom. The outer diameter of the first annular water blocking ring 3 Equal to the outer diameter of the second annular water blocking ring 4 , the outer diameter of the annular fixing seat 5 is larger than the outer diameter of the second annular water blocking ring 4 . A plurality of connecting ribs 103 are fixed on the annular fixing seat 5 along its circumferential direction. The cross-section of the connecting ribs 103 is triangular, and the connecting ribs 103 are integrally formed with the body by injection molding. The connecting ribs 103 can increase the contact area between the embedded part 1 and the floor slab, thereby improving the occlusal force between the embedded part 1 and the floor slab. The annular fixing seat 5 is provided with a plurality of mounting holes 104 equidistantly, the mounting holes 104 are provided with internal threads, and the mounting holes 104 are integrally formed with the body by means of injection molding. Connecting parts such as bolts and pins can be installed in the installation holes 104, and when they are in contact with the concrete in the floor slab, the occlusal force between the embedded part 1 and the floor slab can be improved.

Specifically, the inner wall of the main body is provided with an inclined flow guide rib, and the flow guide rib is integrally formed with the main body by means of injection molding. The guide ribs can make the sewage in the pipeline flow in a spiral direction along the pipe wall of the embedded part 1, so as to make the water flow stably and reduce the sound of the water flow. A diversion port is also provided under the inner part of the main body, and the diversion port is convenient for the injection molding of the embedded part 1 to be released from the mold.

More specifically, the material of the annular metal sleeve 2 is a stainless steel sleeve, a galvanized steel pipe sleeve or an iron pipe sleeve, and the annular metal sleeve 2 is integrally formed with the body by means of injection molding. Stainless steel sleeves, galvanized steel pipe sleeves or iron sleeves all have the advantage of small thermal expansion coefficient, and their deformation is very small under the influence of normal ambient temperature.

1, 4 and 5, the upper end of the expansion joint 6 is a trumpet-shaped third nozzle 601, the lower end of the expansion joint 6 is a cylindrical fourth nozzle 602, and the outer wall of the third nozzle 601 is An external thread is opened, the external thread is connected with a pipe cover 7 , and a sealing ring 8 is arranged between the expansion joint 6 and the pipe connecting piece 10 . An annular groove 603 is formed on the outer wall of the fourth nozzle 602, and a limiting rib 604 that can limit the up and down movement of the pipe clip 9 is arranged below the annular groove 603. Tube clips 9 on the wall. The limit rib 604 can prevent the expansion joint 6 from moving downward. The pipe clip 9 is fixed on the wall. Since the pipe clip 9 is arranged in the annular groove 603 on the expansion joint 6, the expansion joint 6 is fixed on the wall. the wall, avoiding the movement of the expansion joint 6 with the HDPE pipe and the pipe connector 10.

This HDPE pipe rigid embedded part 1 connection component: due to the change of ambient temperature, the embedded part 1 will undergo thermal expansion and contraction, which will cause the embedded part 1 to shrink in its circumferential direction, and a gap will be generated between the floor slab and the floor slab. In case of water seepage, by arranging the annular metal sleeve 2 inside the body of the embedded part 1, the deformation of the embedded part 1 caused by the change of the ambient temperature can be reduced, so that the deformation of the embedded part 1 basically disappears. Similarly, due to the change of ambient temperature, the embedded part 1 will undergo thermal expansion and contraction, resulting in shrinkage of the embedded part 1 in its axial direction, and the embedded part 1 will deform the pipe connector 10 or deform the HDPE pipe , by setting the expansion joint 6 at the lower end of the pipeline connector 10, the pipeline connector 10 and the HDPE pipe can produce an appropriate amount of displacement in the axial direction, which is used to compensate for the shrinkage and deformation of the pipeline due to temperature changes, and better protection. The HDPE pipe and the pipe connector 10 will not cause cracks in the floor slab due to stress.

Welding steps of HDPE pipe and embedded part 1:

1. Keep the inner and outer surfaces of the HDPE pipe and the embedded part 1 dry, and take drying measures if there is water or moisture;

2. Use an electric wire brush to remove the oxide layer on the welding part of the HDPE pipe to make the surface rough, so as to ensure that the two surfaces of the fusion are heated evenly and the fusion is good;

3. Use acetone to wipe the inner surface of the embedded part 1 to remove water, oil, rust and other dirt;

4. Mark the HDPE pipe according to the matching depth of the embedded part 1 to ensure that the HDPE pipe is inserted in place;

5. Finally, electrofusion equipment is used to weld the HDPE pipe and the embedded part 1.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention pertains can make various modifications or additions to the described specific embodiments or substitute in similar manners, but will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

101, the first nozzle; 102, the second nozzle; 103, the connecting rib; 104, the mounting hole; 2, the annular metal sleeve; 3, the first annular water blocking Ring; 4. The second annular water blocking ring; 5. The annular fixed seat; 6. The expansion joint; 601, The third nozzle; 602, The fourth nozzle; 603, The annular groove; 8. Sealing ring; 9. Pipe clamp; 10. Pipe connector; 11. Electrofusion clamp and other terms, but the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; it is contrary to the spirit of the present invention to interpret them as any kind of additional limitation.

Claims (10)

1. A rigid embedded part connection assembly of HDPE pipe, comprising embedded parts and expansion joints, the embedded parts and expansion joints are connected by pipeline connectors, and it is characterized in that, the embedded parts are electrically The fusion clamp is connected to the upper end of the pipeline connector, the lower end of the pipeline connector is inserted into the expansion joint, the embedded part includes a cylindrical body, and the upper end of the body is a cylindrical first tube The lower end of the main body is a cylindrical second nozzle, the inside of the main body is provided with an annular metal sleeve, and the outer side of the main body is sequentially connected with a first annular water blocking ring and a second annular water blocking ring from top to bottom. Ring and annular fixing seat, the upper end of the expansion joint is a trumpet-shaped third nozzle, the lower end of the expansion joint is a cylindrical fourth nozzle, and the outer wall of the third nozzle is provided with an external thread, The outer thread is externally connected with a pipe cover, and a sealing ring is arranged between the expansion joint and the pipe connecting piece. 2 . The HDPE pipe rigid embedded part connection assembly according to claim 1 , wherein a plurality of connecting ribs are fixed on the annular fixed seat along its circumferential direction, and the cross-section of the connecting ribs is triangular. 3 . shape. 3 . The HDPE pipe rigid embedded part connection assembly according to claim 1 , wherein the annular fixing seat is provided with a plurality of mounting holes equidistantly, and the mounting holes are provided with internal threads. 4 . 4. The HDPE pipe rigid embedded part connection assembly according to any one of claims 1-3, wherein an annular groove is formed on the outer wall of the fourth nozzle, and the annular groove is The slot is provided with a pipe clip capable of fixing the expansion joint to the wall. 5 . The HDPE pipe rigid embedded part connection assembly according to claim 4 , wherein a limit rib capable of restricting the up and down movement of the pipe clip is provided below the annular groove. 6 . 6 . The rigid embedded part connection assembly for HDPE pipes according to any one of claims 1 to 3 , wherein the inner wall of the main body has inclined flow guide ribs. 7 . 7 . The HDPE pipe rigid embedded part connection assembly according to claim 6 , wherein the flow guide rib is integrally formed with the body by means of injection molding. 8 . 8. A rigid embedded part connection assembly for HDPE pipes according to any one of claims 1-3, wherein the material of the annular metal sleeve is a stainless steel sleeve, a galvanized steel pipe sleeve or an iron pipe sleeve . 9 . The HDPE pipe rigid embedded part connection assembly according to claim 8 , wherein the annular metal sleeve is integrally formed with the body by means of injection molding. 10 . 10. The HDPE pipe rigid embedded part connection assembly according to any one of claims 1-3, wherein the outer diameter of the first annular water blocking ring is equal to the diameter of the second annular water blocking ring. The outer diameter of the annular fixing seat is larger than the outer diameter of the second annular water blocking ring.

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