HDPE embedded pipe with good sealing effect
By burying the outer and inner steel cylinders at the casing end and the end of the HDPE buried pipe, and using screws and lock nuts to achieve rapid butt, the problems of hot melt docking and unstable quality of the HDPE buried pipe are solved, and the sealing and compressive strength are improved, making it suitable for deep buried installation and vehicle passing environment.
Patent Information
- Application Number
- CN202422104414.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-29
AI Technical Summary
The hot melt docking method of existing HDPE buried pipes is complex and time-consuming, and the docking quality is easily affected by a variety of factors, resulting in poor sealing and low strength, especially in environments where deep buried installations or vehicles pass through.
The outer steel cylinder and the inner steel cylinder are buried at the casing end and the end of the insertion end of the HDPE tube, and the outer steel ring and the inner steel ring are installed on its circumference. The screw and the lock nut can achieve rapid and stable butt, and the sealing gasket can be combined to improve sealing and strength.
It simplifies docking operations, improves sealing and compressive strength, ensures that the docking is not easy to disconnect under high pressure, is suitable for deep burial installation and vehicle passage environment, and has high reliability and long service life.
Smart Images
Figure CN223076541U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of pipes, in particular to an HDPE buried pipe. Background Art
[0002] At present, when laying HDPE buried pipes, the butt joint of HDPE buried pipes is often involved to assemble the required length. Among them, when butt-jointing HDPE buried pipes at present, most of them are butt-jointed by the hot melt butt-jointing method. When carrying out hot melt butt-jointing, first, the ports of two HDPE buried pipes to be butt-jointed are cut and cleaned; then, the ends of the two HDPE buried pipes to be butt-jointed are heated to a softened state by a hot melt butt-welding machine; then, the softened ends of the two HDPE buried pipes are closely attached together so that the softened ends of the two HDPE buried pipes are fused together; then, natural cooling is carried out to cure and bond the ends of the two HDPE buried pipes together.
[0003] This butt-jointing method is very complicated to operate, time-consuming and laborious, and many factors in the butt-jointing process are likely to have an adverse impact on the butt-jointing quality. For example: the operation experience and seriousness of workers, the port matching degree and cleanliness of the two HDPE buried pipes, the heating temperature of the hot melt butt-welding machine, the magnitude of the force to closely attach the two HDPE buried pipes together, the level of the external temperature, the temperature of the HDPE buried pipe itself, the wall thickness of the HDPE buried pipe. It can be seen that there are many factors affecting the butt-jointing quality. In this way, when actually butt-welding and connecting HDPE buried pipes, the situation of unstable butt-jointing quality often occurs easily, which is likely to cause problems such as poor sealing performance and low strength at the butt-joint, thus easily resulting in weak compressive strength at the butt-joint, and further easily causing the situation of cracking at the butt-joint during the buried installation process, especially during the deep buried installation process, the cracking situation is more likely to occur.
[0004] Therefore, it is very necessary to design an HDPE buried pipe with good sealing effect to solve the above technical problems. Summary of the Utility Model
[0005] The purpose of the utility model is to solve the above problems and deficiencies, and provide an HDPE buried pipe with good sealing effect. This HDPE buried pipe can not only reduce the difficulty of butt-jointing operation and improve the efficiency of butt-jointing operation, but also help to greatly reduce the factors that can affect the butt-jointing quality. It can improve the sealing performance and strength of the butt-joint, especially can greatly improve the compressive strength at the butt-joint, which can ensure that the butt-joint will not break even under great pressure during burial, and it is particularly suitable for deep buried installation or the land environment where vehicles pass through. This HDPE buried pipe has very high reliability and very long service life.
[0006] The technical solution of the utility model is realized as follows:
[0007] An HDPE buried pipe with good sealing effect, including a first HDPE pipe and a second HDPE pipe. One end of the first HDPE pipe is a sleeve end, and one end of the second HDPE pipe is an insertion end. Its characteristics are as follows: An outer steel cylinder arranged around its inner hole is buried in the sleeve end. An outer steel ring protruding into the inner hole of the sleeve end is arranged on the inner circumferential surface of the outer steel cylinder, and the outer steel ring is arranged around the inner hole of the sleeve end. A number of screw rods are arranged on the end face of the outer steel ring facing the port of the sleeve end, and each screw rod is arranged around the axial center line of the sleeve end; An inner steel cylinder arranged around its inner hole is buried in the insertion end. An inner steel ring protruding outside the outer wall of the insertion end is arranged on the outer circumferential surface of the inner steel cylinder, and the inner steel ring is arranged around the inner hole of the insertion end. A number of through holes are opened axially on the inner steel ring, and each through hole is arranged around the axial center line of the insertion end; The insertion end is inserted into the sleeve end, and each screw rod passes through the corresponding through hole respectively. A sealing washer is clamped between the inner steel ring and the outer steel ring, and locking nuts are respectively screwed on the ends of each screw rod passing through the through holes.
[0008] On the basis of the above structure, the following two specific assembly structures of the sleeve end and the insertion end are given, and they are respectively:
[0009] First, the sleeve end is a flared end, a blocking convex ring is formed at the transition between the inner wall of the sleeve end and the inner wall of the first HDPE pipe, a first sealing ring is arranged on the blocking convex ring, the insertion end is a straight pipe end, and the port of the insertion end is tightly pressed on the first sealing ring.
[0010] Preferably, a first positioning ring groove is opened at the inner corner of the blocking convex ring facing the insertion end, the first sealing ring is embedded in the first positioning ring groove, and the inner diameter of the first HDPE pipe, the inner diameter of the blocking convex ring, the inner diameter of the first sealing ring and the inner diameter of the insertion end are all the same.
[0011] Preferably, one end of the outer steel cylinder close to the middle of the first HDPE pipe extends to the blocking convex ring.
[0012] Second, the sleeve end is a straight pipe end, a limiting convex ring arranged around its inner hole is arranged on the inner wall of the sleeve end, and the limiting convex ring is located inside the outer steel ring. A second sealing ring is arranged on the end face of the limiting convex ring facing the outer steel ring. The insertion end is a reduced diameter end, and the inner hole diameter of the insertion end is the same as the inner hole diameter of the limiting convex ring. The port of the insertion end is tightly pressed on the second sealing ring.
[0013] Preferably, the end face of the limiting convex ring away from the outer steel ring is a conical surface that gradually shrinks from inside to outside. The two ends of the conical surface are arc-transitionally connected to the inner hole wall of the first HDPE pipe and the inner hole wall of the limiting convex ring respectively. The inner hole wall of the insertion end is arc-transitionally connected to the inner hole wall of the second HDPE pipe.
[0014] Preferably, a second positioning ring groove is formed at the inner corner of the limiting convex ring facing the outer steel ring, the second sealing ring is embedded in the second positioning ring groove, and the inner diameter of the limiting convex ring, the inner diameter of the second sealing ring and the inner diameter of the insertion tube end are the same.
[0015] Preferably, the outer steel ring extends to the limiting convex ring.
[0016] Preferably, the outer steel cylinder and the outer steel ring are of an integral stainless steel structure.
[0017] Preferably, the inner steel cylinder and the inner steel ring are of an integral stainless steel structure.
[0018] Advantages of the present utility model: On the HDPE buried pipe, an outer steel cylinder and an inner steel cylinder are respectively buried in the sleeve end and the insertion tube end, and protruding outer steel rings and inner steel rings are respectively arranged on the inner circumferential surface of the outer steel cylinder and the outer circumferential surface of the inner steel cylinder; in this way, the outer steel cylinder and the outer steel ring can be used to double-strengthen the sleeve end, and the inner steel cylinder and the inner steel ring can be used to double-strengthen the insertion tube end, which can greatly improve the structural strength and durability of the sleeve end and the insertion tube end. By arranging a screw on the outer steel ring, passing the screw through the perforation on the inner steel ring and then locking it with a locking nut, and also clamping a sealing washer between the inner steel ring and the outer steel ring; in this way, only by tightening the locking nut forcefully can the two HDPE pipes be quickly and stably butted together, which can not only reduce the difficulty of the butting operation and improve the efficiency of the butting operation, but also help to greatly reduce the factors that can affect the butting quality, and can greatly improve the sealing performance and strength during actual butting. Coupled with the insertion tube end being inserted into the sleeve end, the inner steel ring will be located in the outer steel ring, which can achieve a double-compression effect at the butting joint. In addition, the outer steel ring and the inner steel ring can also enhance the compressive strength of the butting joint, which can greatly improve the compressive strength of the butting joint, ensuring that the butting joint will not break even under great pressure during burial, and it is particularly suitable for deep burial installation or land environments with vehicle passage. The HDPE buried pipe has very high reliability and a very long service life. Description of the Drawings
[0019] Figure 1 One of the structural schematic diagrams of the HDPE buried pipe in the present utility model.
[0020] Figure 2 Another structural schematic diagram of the HDPE buried pipe in the present utility model. Detailed Embodiments
[0021] Such as Figure 1 And Figure 2As shown in the figure, a kind of HDPE buried pipe with good sealing effect of the utility model includes a first HDPE pipe 1 and a second HDPE pipe 2. One end of the first HDPE pipe 1 is a sleeve end 11, and one end of the second HDPE pipe 2 is an insertion end 21. To achieve the invention purpose of the utility model, an outer steel cylinder 12 arranged around its inner hole is buried in the sleeve end 11. An outer steel ring 13 protruding into the inner hole of the sleeve end 11 is arranged on the inner circumferential surface of the outer steel cylinder 12, and the outer steel ring 13 is arranged around the inner hole of the sleeve end 11. A plurality of screw rods 14 are arranged on the end surface of the outer steel ring 13 facing the port of the sleeve end 11, and each screw rod 14 is arranged around the axial center line of the sleeve end 11; An inner steel cylinder 22 arranged around its inner hole is buried in the insertion end 21. An inner steel ring 23 protruding outside the outer wall of the insertion end 21 is arranged on the outer circumferential surface of the inner steel cylinder 22, and the inner steel ring 23 is arranged around the inner hole of the insertion end 21. A plurality of through holes 24 are arranged axially on the inner steel ring 23, and each through hole 24 is arranged around the axial center line of the insertion end 21; The insertion end 21 is inserted into the sleeve end 11, and each screw rod 14 passes through the corresponding through hole 24 respectively. A sealing gasket 3 is clamped between the inner steel ring 23 and the outer steel ring 13, and a locking nut 4 is screwed on one end of each screw rod 14 passing through the through hole 24.
[0022] On this HDPE buried pipe, an outer steel cylinder 12 and an inner steel cylinder 22 are respectively buried in the sleeve end 11 and the insertion end 21, and protruding outer steel rings 13 and inner steel rings 23 are respectively arranged on the inner circumferential surface of the outer steel cylinder 12 and the outer circumferential surface of the inner steel cylinder 22; In this way, the sleeve end 11 can be double-strengthened by the outer steel cylinder 12 and the outer steel ring 13, and the insertion end 21 can be double-strengthened by the inner steel cylinder 22 and the inner steel ring 23, which can greatly improve the structural strength and durability of the sleeve end 11 and the insertion end 21.
[0023] By arranging screw rods 14 on the outer steel ring 13, passing the screw rods 14 through the through holes 24 on the inner steel ring 23 and then locking them with locking nuts 4, and also clamping a sealing gasket 3 between the inner steel ring 23 and the outer steel ring 13; In this way, by simply tightening the locking nuts 4 with force, the two HDPE pipes can be quickly and stably butted together, which can not only reduce the difficulty of the butting operation and improve the efficiency of the butting operation, but also help to greatly reduce the factors that can affect the butting quality, and can greatly improve the sealing performance and strength during actual butting.
[0024] In addition, the insertion end 21 is inserted into the sleeve end 11, which will make the inner steel ring 23 located in the outer steel ring 13, so as to achieve the dual compressive resistance effect at the docking part. In addition, the outer steel ring 13 and the inner steel ring 23 can also enhance the compressive strength at the docking part, thus greatly improving the compressive strength at the docking part. This can ensure that the docking part will not break under great pressure during burial. It is especially suitable for deep burial installation or land environments where vehicles pass by. This HDPE buried pipe has very high reliability and a very long service life.
[0025] As Figure 1 shown in Figure 2 the figure, the inner diameters of the first HDPE pipe 1 and the second HDPE pipe 2 are the same, which is conducive to unified manufacturing.
[0026] In the actual use process, this HDPE buried pipe can be used as both a protection pipe for power cables and a sewage pipe for municipal administration, and it can meet different usage requirements.
[0027] As Figure 1 shown in Figure 2 the figure, limiting ring grooves 31 are respectively formed on the opposite surfaces of the outer steel ring 13 and the inner steel ring 23. Both ends of the sealing gasket 3 are respectively embedded in the two limiting ring grooves 31, and the screw 14 is arranged through the sealing gasket 3. This not only facilitates improving the stability and reliability of the installation and positioning of the sealing gasket 3, but also is convenient for using a sealing gasket 3 with a large wall thickness, so as to facilitate playing a more stable and reliable sealing role.
[0028] On the basis of the above structure, the following two specific assembly structures of the sleeve end and the insertion end are given, and they are respectively:
[0029] The first one, as Figure 1 shown in
[0030] the figure, the sleeve end 11 is a flared end, a blocking convex ring 15 is formed at the transition between the inner wall of the sleeve end 11 and the inner wall of the first HDPE pipe 1, a first sealing ring 16 is arranged on the blocking convex ring 15, the insertion end 21 is a straight pipe end, and the port of the insertion end 21 is tightly pressed on the first sealing ring 16. This can further improve the sealing performance of the docking, and is conducive to the inner holes of the first HDPE pipe 1 and the second HDPE pipe 2 forming a straight-through effect, which is conducive to improving the convenience and performance of use, and thus helps to further improve the applicability of this HDPE buried pipe. Figure 1As shown in the figure, a first positioning ring groove 17 is formed at the inner corner of the blocking convex ring 15 facing the insertion pipe end 21. The first sealing ring 16 is fitted in the first positioning ring groove 17. The inner diameter of the first HDPE pipe 1, the inner diameter of the blocking convex ring 15, the inner diameter of the first sealing ring 16, and the inner diameter of the insertion pipe end 21 are all the same. This can not only improve the stability and accuracy of the installation and positioning of the first sealing ring 16, but also facilitate the formation of a better direct-through effect, which can make the cable threading or sewage flow more smooth, and further improve the use performance.
[0031] As Figure 1 shown in the figure, one end of the outer steel cylinder 12 near the middle of the first HDPE pipe 1 extends to the blocking convex ring 15. This can strengthen the entire flared end forming the sleeve end 11, thus helping to further improve the structural strength of the sleeve end 11, and further helping to improve the reliability of the HDPE buried pipe.
[0032] Second, as Figure 2 shown in the figure, the sleeve end 11 is a straight pipe end. A limiting convex ring 18 arranged around its inner hole is provided on the inner wall of the sleeve end 11, and the limiting convex ring 18 is located inside the outer steel ring 13. A second sealing ring 19 is provided on the end face of the limiting convex ring 18 facing the outer steel ring 13. The insertion pipe end 21 is a reduced-diameter end, and the inner hole diameter of the insertion pipe end 21 is the same as the inner hole diameter of the limiting convex ring 18. The port of the insertion pipe end 21 is tightly pressed on the second sealing ring 19. This can further improve the docking tightness, and thus help to further improve the applicability of the HDPE buried pipe.
[0033] As Figure 2 shown in the figure, a clearance gap 10 is reserved between the outer wall of the reduced-diameter part of the insertion pipe end 21 and the port of the sleeve end 11. The clearance gap 10 provides a position for a wrench tool to act on the locking nut 4, thus helping to further improve the applicability of the HDPE buried pipe.
[0034] As Figure 2 shown in the figure, the end face of the limiting convex ring 18 away from the outer steel ring 13 is a tapered surface 181 that gradually narrows from the inside to the outside. Both ends of the tapered surface 181 are arc-transitionally connected to the inner hole wall of the first HDPE pipe 1 and the inner hole wall of the limiting convex ring 18 respectively. The inner hole wall of the insertion pipe end 21 and the inner hole wall of the second HDPE pipe 2 are arc-transitionally connected. This can facilitate the formation of a very smooth channel, which can make the cable threading or sewage flow more smooth, and further improve the use performance.
[0035] As Figure 2As shown, a second positioning ring groove 182 is formed at the inner corner of the limiting convex ring 18 facing the outer steel ring 13. The second sealing ring 19 is fitted in the second positioning ring groove 182. The inner diameters of the limiting convex ring 18, the second sealing ring 19 and the insertion tube end 21 are the same. This can not only improve the stability and accuracy of the installation and positioning of the second sealing ring 19, but also facilitate the formation of a very smooth channel, which can make the cable threading or sewage flow more smooth, and further improve the service performance.
[0036] As shown in the figure Figure 2 As shown, the outer steel ring 13 extends to the limiting convex ring 18. This can utilize the outer steel ring 13 to enhance the structural strength of the limiting convex ring 18, so as to facilitate the improvement of the limiting strength of the limiting convex ring 18, and further contribute to the improvement of the reliability and applicability of the HDPE buried pipe.
[0037] As Figure 1 and Figure 2 As shown, the outer steel cylinder 12 and the outer steel ring 13 are of an integral stainless steel structure. This can improve the structural strength and durability, thus contributing to the further improvement of the reliability and service life of the HDPE buried pipe.
[0038] The screw 14 and the locking nut 4 are also made of stainless steel. The screw 14 can be integrally formed on the outer steel ring 13 or welded and fixed to the outer steel ring 13, which is beneficial to achieve a more stable and reliable locking effect.
[0039] As Figure 1 and Figure 2 As shown, the inner steel cylinder 22 and the inner steel ring 23 are of an integral stainless steel structure. This can improve the structural strength and durability, thus contributing to the further improvement of the reliability and service life of the HDPE buried pipe.
Claims
1. An HDPE buried pipe with good sealing effect, including a first HDPE pipe (1) and a second HDPE pipe (2). One end of the first HDPE pipe (1) is a sleeve end (11), and one end of the second HDPE pipe (2) is an insertion end (21). It is characterized in that: An outer steel cylinder (12) arranged around its inner hole is buried in the sleeve end (11). An outer steel ring (13) protruding into the inner hole of the sleeve end (11) is arranged on the inner circumferential surface of the outer steel cylinder (12), and the outer steel ring (13) is arranged around the inner hole of the sleeve end (11). A number of screw rods (14) are arranged on the end face of the outer steel ring (13) facing the port of the sleeve end (11), and each screw rod (14) is arranged around the axial center line of the sleeve end (11); An inner steel cylinder (22) arranged around its inner hole is buried in the insertion end (21). An inner steel ring (23) protruding outside the outer wall of the insertion end (21) is arranged on the outer circumferential surface of the inner steel cylinder (22), and the inner steel ring (23) is arranged around the inner hole of the insertion end (21). A number of through holes (24) are opened axially on the inner steel ring (23), and each through hole (24) is arranged around the axial center line of the insertion end (21); The insertion end (21) is inserted into the sleeve end (11), and each screw rod (14) passes through the corresponding through hole (24) respectively. A sealing gasket (3) is clamped between the inner steel ring (23) and the outer steel ring (13), and locking nuts (4) are respectively screwed on the ends of each screw rod (14) passing through the through hole (24).
2. The HDPE buried pipe with good sealing effect according to claim 1, characterized in that: The sleeve end (11) is a flared end. A blocking convex ring (15) is formed at the transition between the inner wall of the sleeve end (11) and the inner wall of the first HDPE pipe (1). A first sealing ring (16) is arranged on the blocking convex ring (15). The insertion end (21) is a straight pipe end, and the port of the insertion end (21) is tightly pressed on the first sealing ring (16).
3. The HDPE buried pipe with good sealing effect according to claim 2, characterized in that: A first positioning ring groove (17) is opened at the inner corner of the blocking convex ring (15) facing the insertion end (21). The first sealing ring (16) is embedded in the first positioning ring groove (17). The inner diameter of the first HDPE pipe (1), the inner diameter of the blocking convex ring (15), the inner diameter of the first sealing ring (16) and the inner diameter of the insertion end (21) are all the same.
4. The HDPE buried pipe with good sealing effect according to claim 2, characterized in that: One end of the outer steel cylinder (12) close to the middle of the first HDPE pipe (1) extends to the blocking convex ring (15).
5. The HDPE buried pipe with good sealing effect according to claim 1, characterized in that: The sleeve end (11) is a straight pipe end. A limiting convex ring (18) arranged around its inner hole is arranged on the inner wall of the sleeve end (11), and the limiting convex ring (18) is located inside the outer steel ring (13). A second sealing ring (19) is arranged on the end face of the limiting convex ring (18) facing the outer steel ring (13). The insertion end (21) is a reduced diameter end, and the inner hole diameter of the insertion end (21) is the same as the inner hole diameter of the limiting convex ring (18). The port of the insertion end (21) is tightly pressed on the second sealing ring (19).
6. The HDPE buried pipe with good sealing effect according to claim 5, wherein: The end face of the limiting convex ring (18) away from the outer steel ring (13) is a conical surface (181) that gradually narrows from the inside to the outside. The two ends of the conical surface (181) are respectively arc-transitionally connected to the inner hole wall of the first HDPE pipe (1) and the inner hole wall of the limiting convex ring (18). The inner hole wall of the insertion end (21) is arc-transitionally connected to the inner hole wall of the second HDPE pipe (2).
7. The HDPE buried pipe with good sealing effect according to claim 5, characterized in that: A second positioning ring groove (182) is formed at the inner corner of the limiting convex ring (18) facing the outer steel ring (13). The second sealing ring (19) is embedded in the second positioning ring groove (182). The inner diameter of the limiting convex ring (18), the inner diameter of the second sealing ring (19), and the inner diameter of the insertion end (21) are all the same.
8. The HDPE buried pipe with good sealing effect according to claim 5, characterized in that: The outer steel ring (13) extends onto the limiting convex ring (18).
9. The HDPE buried pipe with good sealing effect according to claim 1, wherein: The outer steel cylinder (12) and the outer steel ring (13) are an integral stainless steel structure.
10. The HDPE buried pipe with good sealing effect according to claim 1, characterized in that: The inner steel cylinder (22) and the inner steel ring (23) are an integral stainless steel structure.