Drainage elbow joint

Abstract

The utility model relates to a drainage elbow connector which comprises a connector body made of metal, the connector body is of an arc-shaped bent tubular structure, a bent inner hole is formed in the connector body, and an included angle is formed between the axes of the two ends of the inner hole. A lining is fixedly arranged on the hole wall of an inner hole of the connector body, the hole diameter of the lining is matched with the pipe diameter of an inner pipe of a drainage pipe to be connected, and the lining is provided with a matching structure connected with the end of the drainage pipe to be connected. Sealing structures are arranged in the two ends of the connector, and sealing rings used for sealing the connector and the drainage pipe are arranged in the sealing structures. The inner hole of the connector is bent to form an included angle, and after the two drainage pipes are connected, laying of the drainage pipes can meet the requirements of complex terrains and is more flexible; the lining is generally made of the same material as the drain pipe, so that the joint main body is prevented from being corroded, and the service life of the joint is prolonged; sealing structures are arranged in the two ends of the connector, sealing rings are arranged, a sealing effect is achieved after the drainage pipes are connected, and leakage is prevented.

Description

Technical Field

[0001] This utility model belongs to the field of drainage pipes, and in particular relates to a drainage bend joint. Background Technology

[0002] Drainage pipes are mainly responsible for draining rainwater, sewage, and agricultural irrigation, and play a crucial role in the municipal pipe network.

[0003] Most existing drainage pipes are laid underground, requiring trenches to be dug. Due to the complexity of the terrain, these trenches often have bends. Furthermore, during manufacturing, drainage pipes are typically cut to the required length for transportation and installation, necessitating connections between them using appropriate structures.

[0004] Conventional connections are mostly between the ends of drain pipes. For example, drain pipes with socket joints can be connected simply by inserting them together. Another method is to use clamps to hold the ends of two opposing drain pipes together. Existing connections are mostly straight lines and cannot accommodate curved or slotted connections. Therefore, a drain pipe elbow joint is proposed. Summary of the Invention

[0005] This utility model provides a drainage bend connector, wherein the inner bore axes of the two ends of the connector form an angle, so that the axes of the two connected drainage pipes also form an angle, thus meeting the actual connection requirements.

[0006] The specific technical solution of this utility model is as follows: a drainage bend connector, comprising a connector body made of metal, the connector body having an arc-shaped curved tubular structure, the interior of the connector body having a curved inner hole, the axes of the two ends of the inner hole forming an included angle; the inner wall of the inner hole of the connector body is fixedly provided with an inner liner, the diameter of the inner liner matching the diameter of the inner pipe of the drainage pipe to be connected, the inner liner having a mating structure for connecting with the end of the drainage pipe to be connected; sealing structures are provided inside the two ends of the connector, and sealing rings for sealing the connector and the drainage pipe are configured in the sealing structures.

[0007] The inner bore of the connector is bent at an angle, so that when the connector connects two drain pipes, the two drain pipes also form an angle. This allows the drainage pipes to be laid in a way that adapts to complex terrain and makes the laying more flexible. The inner bore of the connector is curved, so it does not affect the internal water flow after connecting the drain pipes. The main body of the connector is made of metal, which has high strength. It has a fixed inner lining with a mating structure for connecting with the end of the drain pipe. The inner lining is generally made of the same material as the drain pipe, which can prevent the connector body from being corroded and improve the service life of the connector. As a connector for connecting two drain pipes, the connector has a sealing structure and a sealing ring at both ends. After the drain pipes are connected, they act as a seal to prevent leakage at the connection point.

[0008] Preferably, the end of the liner is located inside the end of the joint body, the mating structure is located at the end of the liner, the wall thickness of the end of the joint body is greater than the wall thickness of the corresponding liner part of the joint body, and the part where the wall thickness changes is bounded by the end of the liner; the sealing structure inside both ends of the joint is an annular groove, and the annular groove is located between the radial surface where the wall thickness of the joint body changes and the end face of the liner.

[0009] Preferably, the inner walls at both ends of the connector body are conical, with the larger diameter end of the cone facing the opening side of the connector body and the smaller diameter end facing the end side of the inner liner. A wedge-shaped annular groove is provided on the conical wall, and a conical sleeve is placed inside the conical end of the connector body. A protruding triangular annular protrusion is provided on the outer side of the conical sleeve, which fits into the wedge-shaped annular groove. The conical port facilitates insertion and mating with a drain pipe, and the conical sleeve can seal both ends of the connector, preventing debris from entering the gap between the connector and the drain pipe. The wedge-shaped annular groove and the annular protrusion cooperate to form a backlash prevention structure.

[0010] Preferably, the inner wall of the lining inside the joint is provided with guide vanes, the height of which gradually increases, with the lower end facing the opening of the joint. The guide vanes are located on the outer curved surface of the inner wall of the lining, which is axially bent. There are multiple guide vanes, with the uppermost one located on the center surface of the joint. The guide vanes reduce the impact of water flow on the inner wall of the lining, allowing the water flow to be smoothly redirected.

[0011] Preferably, the joint body adopts a uniform wall thickness structure, the end of the liner is flush with the end of the joint body, the mating structure is located at the end of the liner, the sealing structure is located at the end of the mating structure, and the wall thickness of the end of the mating structure of the liner is less than the wall thickness between the mating structures at both ends of the liner.

[0012] Preferably, the inner wall of the sealing structure at the off-end end of the liner is provided with multiple annular grooves, and a second sealing ring is disposed in the groove.

[0013] Preferably, the sealing structure is in the shape of an annular groove, with a retaining post at the bottom of the groove. The mating structure of the inner liner is located on the groove side of the sealing structure facing the middle part of the inner liner, and a retaining groove adapted to the retaining post is provided on the outer side of the sealing ring.

[0014] Preferably, the sealing ring includes a left sealing part, a right sealing part, and an inner side connecting the left sealing part and the right sealing part, with a groove located between the left sealing part and the right sealing part; the two sides of the inner side are inclined sides, and the inner side and the inclined sides form an annular external protrusion groove on the inner side of the sealing ring.

[0015] Preferably, both the left and right sealing parts are open semi-closed structures, with the openings located on the side where the sealing ring corresponds to the groove. Both the left and right sealing parts contain an elastomer. The left sealing part faces the opening of the connector, and the right sealing part faces the interior of the connector. The right sealing part has a sealing connection structure that matches the mating structure of the end of the pipe body and the end of the inner liner to be connected.

[0016] Preferably, a protective layer is attached to the outer surface of the connector body, and the protective layer is integrated with the inner liner, thereby sealing the connector body.

[0017] Preferably, the included angle of the joint bend is 15°, 30°, 45°, or 60°.

[0018] The beneficial effects of this utility model are as follows: the inner hole of the connector is bent at an angle, and after the connector connects two drainage pipes, the two drainage pipes also form an angle. This allows the laying of drainage pipes to adapt to the needs of complex terrain, and the laying of drainage pipes is more flexible. The inner hole of the connector is curved, so it does not affect the internal water flow after connecting the drainage pipes. The main body of the connector is made of metal, which has high strength. It has a fixed inner lining with a mating structure for connecting with the end of the drainage pipe. The inner lining is generally made of the same material as the drainage pipe, which can prevent the main body of the connector from being corroded and improve the service life of the connector. As a connector for connecting two drainage pipes, the connector has a sealing structure and a sealing ring at both ends. After the drainage pipes are connected, they play a sealing role to prevent leakage at the connection point. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of the present invention;

[0020] Figure 2 This is an axial schematic diagram of this utility model;

[0021] Figure 3 This is a schematic diagram of the second structure of this utility model;

[0022] Figure 4 This is a connection diagram of this utility model;

[0023] Figure 5 This is a schematic diagram of the third structure of this utility model;

[0024] Figure 6 This is a utility model Figure 5 A schematic diagram of the connector body of the scheme shown;

[0025] Figure 7 This is a utility model Figure 5 A schematic diagram of the sealing ring structure shown in the diagram;

[0026] Figure 8 This is a utility model Figure 7 An enlarged schematic diagram of the sealing ring shown;

[0027] Figure 9 This is a schematic diagram of the fourth structure of this utility model;

[0028] Figure 10 This is a schematic diagram of the structure of a conical sleeve according to the present invention;

[0029] In the diagram: 1. Connector body, 2. Conical wall, 3. Wedge-shaped annular groove, 4. Sealing structure, 5. Fitting structure, 6. Inner hole, 7. Liner, 8. Guide vane, 9. Groove, 10. Drain pipe, 11. Sealing ring, 12. Second sealing ring, 13. Locking post, 14. Left sealing part, 15. Right sealing part, 16. Locking groove, 17. Opening, 18. Inner side, 19. Annular external protrusion groove, 20. Elastomer, 21. Inclined edge, 22. Protective layer, 23. Conical sleeve, 24. Annular protrusion. Detailed Implementation

[0030] The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings. Example

[0031] like Figure 1 As shown, a drain pipe elbow joint includes a metal joint body 1, which is an arc-shaped, curved tubular structure. The interior of the joint body has a curved inner bore, with the axes at both ends of the inner bore forming an angle. In this embodiment, the angle is 30°. An inner liner 7 is fixedly provided on the inner wall of the inner bore of the joint body. The diameter of the inner bore 6 of the liner matches the diameter of the inner pipe of the drain pipe 10 to be connected. The liner has a mating structure 5 that connects to the end of the drain pipe to be connected. Sealing structures 4 are provided inside both ends of the joint, and sealing rings 11 for sealing the joint and the drain pipe are disposed within the sealing structures.

[0032] The end of the liner is located inside the end of the connector body. The mating structure is located at the end of the liner. The wall thickness of the end of the connector body is greater than the wall thickness of the corresponding liner portion of the connector body, with the change in wall thickness defined by the end of the liner. In this embodiment, the mating structure is used to mate with the end of the drain pipe. The end of the drain pipe has a radial surface and a transition chamfer. The mating structure of the liner is adapted to the radial surface and the transition chamfer surface, having a radial mating portion and a chamfered mating portion. The sealing structure at both ends of the connector is an annular groove, located between the radial surface where the wall thickness of the connector body changes and the end face of the liner.

[0033] The inner walls at both ends of the connector body are conical, with the larger diameter end of the cone facing the opening of the connector body and the smaller diameter end facing the end of the inner liner. A wedge-shaped annular groove 3 is provided on the conical wall 2, and a conical sleeve 22 is disposed inside the conical end of the connector body (see...). Figure 10 The outer side of the conical sleeve is provided with an outwardly protruding triangular annular protrusion 24. The conical sleeve is placed on the end of the drain pipe. After the drain pipe and the conical end of the connector are inserted and matched, the conical sleeve is inserted into the gap between the drain pipe and the conical wall. The annular protrusion on the conical sleeve and the wedge-shaped annular groove are matched to form a backstop structure. Example

[0034] like Figure 2 As shown, a drainage elbow joint has guide vanes on the inner wall of its liner. The guide vanes are radially protruding within the liner, with their height gradually increasing. The lower end of the guide vane faces the opening of the joint. The guide vanes are located on the outer curved surface of the axially bent inner wall of the liner, which is a water-flow-facing surface. Multiple guide vanes are located on the lower half of the curved surface when the joint is placed horizontally, with the uppermost guide vane positioned at the center of the joint. In this embodiment, the end of the guide vane facing inwards towards the inside of the joint has the greatest height.

[0035] like Figure 3 As shown, the height of the guide vanes varies, with the highest height in the middle section and the height gradually decreasing to 0 at both ends. Example

[0036] like Figure 3 As shown, a drainage elbow joint has a joint body 1 with a uniform wall thickness. The end of the inner liner 7 is flush with the end of the joint body. The mating structure 5 is located at the inner end of the inner liner, and the sealing structure 4 is located at the outer end of the mating structure. The wall thickness of the outer end of the mating structure is less than the wall thickness between the mating structures at both ends of the inner liner. Multiple annular grooves 9 are provided on the inner wall of the outer end of the sealing structure, and a second sealing ring 12 is disposed within each groove.

[0037] like Figure 4 As shown, a sealing ring 11 is provided at the sealing structure of the connector, and a second sealing ring is fitted at the end of the drain pipe. Then, the drain pipe is inserted into the end of the connector, and the end of the drain pipe abuts against the mating structure inside the connector. The sealing ring and the outer diameter enlargement of the end of the drain pipe cooperate to form a seal and limit the drain pipe from retracting. The second sealing ring cooperates with the groove inside the connector. Example

[0038] like Figure 5 Figure 6 Figure 7 Figure 8As shown, a drainage elbow joint has an end of the liner flush with the end of the joint body. The sealing structure is located on the inner wall of the liner and is an annular groove. A retaining post 13 is provided at the bottom of the annular groove. The retaining post is radially arranged inside the joint and has a T-shaped cross-section. The wider end faces the center of the joint. The mating structure of the liner is located on the groove side of the sealing structure facing the middle part of the liner. A retaining groove 16 that matches the retaining post is provided on the outer side of the sealing ring that mates with the sealing structure.

[0039] The sealing ring includes a left sealing part 14, a right sealing part 15, and an inner side 18 connecting the left and right sealing parts. A groove is located between the left and right sealing parts, with the inner side facing the groove. Both the left and right sealing parts are open, semi-closed structures, with the openings located on the side of the sealing ring corresponding to the groove. An elastomer 20 is embedded within both the left and right sealing parts. The groove mates with a retaining post, and the opening mates with the protruding portion at the end of the retaining post. The right sealing part has a sealing connection structure that matches the mating structure of the end of the pipe body and the end of the inner liner to be connected. This sealing connection structure includes a radial connection structure and a chamfered connection structure. When the sealing ring is assembled with the sealing structure, the left sealing part faces the side of the joint opening, and the right sealing part faces the side of the joint interior. The two sides of the inner side are inclined edges 21, forming an annular external protrusion groove 19 on the inner side of the sealing ring.

[0040] After the drain pipe and the connector are plugged in, the enlarged outer diameter of the drain pipe end matches the annular outer groove of the connector sealing ring, thus achieving a seal between the drain pipe and the connector, and at the same time forming a non-reverse structure for the drain pipe relative to the connector. Example

[0041] like Figure 9 As shown, a drainage elbow joint has a protective layer 22 attached to the outer surface of the joint body. The protective layer and the inner lining 7 are integrally connected, and the protective layer and the inner lining seal the joint body. The remaining structure is the same as in other embodiments.

[0042] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A drain trap adapter, comprising: The connector body (1) is made of metal. The connector body is a curved tubular structure with a curved inner hole inside. The axes of the two ends of the inner hole form an angle. The inner wall of the inner hole of the connector body is fixedly provided with an inner liner (7). The diameter of the inner liner matches the diameter of the inner pipe of the drain pipe to be connected. The inner liner has a mating structure (5) that connects with the end of the drain pipe to be connected. The two ends of the connector are provided with a sealing structure (4). The sealing structure is equipped with a sealing ring (11) for sealing the connector and the drain pipe.

2. A waste trap coupling according to claim 1, characterised in that The end of the liner is located inside the end of the joint body, and the mating structure is located at the end of the liner. The wall thickness of the end of the joint body is greater than the wall thickness of the corresponding liner part of the joint body, and the part where the wall thickness changes is bounded by the end of the liner. The sealing structure inside both ends of the joint is an annular groove, which is located between the radial surface where the wall thickness of the joint body changes and the end face of the liner.

3. A waste trap coupling according to claim 2, wherein, The inner walls of both ends of the connector body are conical, with the large diameter end of the cone facing the opening side of the connector body and the small diameter end facing the end side of the inner liner; a wedge-shaped annular groove (3) is provided on the conical wall, and a conical sleeve (23) is provided inside the conical end of the connector body, and an outwardly protruding triangular annular protrusion (24) is provided on the outside of the conical sleeve, which is adapted to the wedge-shaped annular groove.

4. A drain trap connector according to claim 1, wherein The inner wall of the lining inside the joint is provided with guide wings (8). The height of the guide wings gradually increases, and the end with the lower height faces the opening end of the joint. The guide wings are located on the outer inner wall curved surface of the lining. There are multiple guide wings, among which the uppermost guide wing is located on the center surface of the joint.

5. A drain trap connector according to claim 1, wherein The main body of the joint adopts a structure with equal wall thickness. The end of the inner liner is flush with the end of the main body of the joint. The mating structure is located at the end of the inner liner, and the sealing structure is located at the end of the mating structure. The wall thickness of the end of the mating structure of the inner liner is less than the wall thickness between the mating sealing structures at both ends of the inner liner.

6. A waste trap coupling according to claim 5, wherein, The inner wall of the sealing structure of the liner is provided with multiple annular grooves (9) at the end, and a second sealing ring (12) is disposed in the groove.

7. A waste trap coupling according to claim 5, wherein, The sealing structure is in the shape of an annular groove, and a retaining post (13) is provided at the bottom of the annular groove. The mating structure of the inner lining is located on the groove side of the sealing structure facing the middle part of the inner lining, and a retaining groove (16) that matches the retaining post is provided on the outer side of the sealing ring.

8. A waste trap coupling according to claim 7, wherein, The sealing ring includes a left sealing part, a right sealing part, and an inner side connecting the left sealing part and the right sealing part. The groove is located between the left sealing part and the right sealing part. The two sides of the inner side are inclined sides, and the inner side and the inclined sides form an annular external protrusion groove (19) on the inner side of the sealing ring.

9. A waste trap coupling according to claim 8, wherein, Both the left and right sealing parts are open semi-closed structures, with the openings located on the side where the sealing ring is located. Both the left and right sealing parts contain an elastomer (20). The left sealing part faces the opening of the joint, and the right sealing part faces the inside of the joint. The right sealing part has a sealing connection structure that matches the mating structure of the end of the pipe body to be connected and the end of the inner liner.

10. A waste trap coupling according to claim 1 or 5 or 6 or 7 or 8 or 9, wherein, The outer surface of the connector body is covered with a protective layer (22), which is integrated with the inner lining. The protective layer and the inner lining seal the connector body.

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