Displacement Compensation Type Double Cone Elastic Joint for Drainage Pipe

Abstract

Displacement compensation type double-cone elastic joint for drainage pipes, comprising a positioning and folding structure, a left cone pipe and a right cone pipe integrally made of elastic material. The left cone pipe has a conical structure with a smaller left end and a larger right end, and the right cone pipe has a conical structure with a larger left end and a smaller right end. The left cone pipe and the right cone pipe are symmetrically arranged left and right. The right end of the left cone pipe is integrally connected to the left end of the positioning and folding structure, and the left end of the right cone pipe is integrally connected to the right end of the positioning and folding structure. The inner wall of the left cone pipe is provided with a left spiral cross-type auxiliary water-blocking structure, and the inner wall of the right cone pipe is provided with a right spiral cross-type auxiliary water-blocking structure. In the present invention, a grid-type water-blocking structure is provided on the inner walls of the left cone pipe and the right cone pipe to improve the sealing performance with the outer circle of the drainage pipe. At the same time, an elastic positioning and folding structure is provided between the left cone pipe and the right cone pipe. When the drainage pipe settles and displaces, the elastic positioning and folding structure can stretch without damaging the entire joint, thus ensuring good sealing performance of the combination of static and dynamic states.

Description

Technical Field

[0001] The present invention belongs to the technical field of construction sealing connection of drainage pipes, and particularly relates to a displacement compensation type double-cone elastic joint for drainage pipes. Background Art

[0002] The Chinese utility model patent CN 203880283 U discloses a double-cone joint for connecting drainage pipes, which has the following disadvantages or deficiencies in the actual construction process: when the foundation settlement of the drainage pipe is too large, the two butt-jointed drainage pipes will have displacements to varying degrees (including the radial direction and the axial direction), and the gaps at the butt-joint of the two drainage pipes become uneven, which will cause the middle part of the double-cone joint to be concentrated with uncertain-direction stresses, resulting in poor sealing performance of the double-cone joint and water leakage; in addition, the inner wall of the double-cone joint is smooth, and when the outer circle of the drainage pipe is not very round, the sealing effect is not good. Summary of the Invention

[0003] In order to solve the deficiencies in the prior art, the present invention provides a displacement compensation type double-cone elastic joint for drainage pipes, which can accommodate displacements in different directions of the drainage pipes and still maintain good sealing performance, and prevent stress concentration at the connection of adjacent drainage pipes during foundation settlement.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions: A displacement compensation type double-cone elastic joint for drainage pipes includes a positioning folding structure integrally made of an elastic material, a left cone pipe, and a right cone pipe. The left cone pipe has a conical structure with a smaller left end and a larger right end, and the right cone pipe has a conical structure with a larger left end and a smaller right end. The left cone pipe and the right cone pipe are symmetrically arranged left and right. The right end of the left cone pipe is integrally connected to the left end of the positioning folding structure, and the left end of the right cone pipe is integrally connected to the right end of the positioning folding structure. The inner wall of the left cone pipe is provided with a left spiral cross-type auxiliary water-blocking structure, and the inner wall of the right cone pipe is provided with a right spiral cross-type auxiliary water-blocking structure.

[0005] The positioning folding structure is an overall ring structure. The inner diameter of the positioning folding structure in the folded state is smaller than the outer diameter of the connected drainage pipe, and the outer diameter of the positioning folding structure in the folded state is equal to the maximum outer diameter of the left cone pipe and the right cone pipe. The cross-section of the positioning folding structure along the axial direction is at least one group of U-shaped folds.

[0006] Installation connecting ribs for connecting the left and right sides are provided inside the U-shape of the positioning folding structure. A number of installation connecting ribs are evenly arranged in a circumferential array along the center line direction of the left cone pipe and the right cone pipe. The length direction of each installation connecting rib is consistent with the radial direction of the positioning folding structure. A V-shaped groove is provided at the end of each installation connecting rib away from the positioning folding structure.

[0007] The maximum end inner diameter of the left cone pipe and the right cone pipe is equivalent to the outer diameter of the connected drainage pipe, and the minimum end inner diameter of the left cone pipe and the right cone pipe is smaller than the outer diameter of the connected drainage pipe.

[0008] The smallest ends of the left cone tube and the right cone tube are respectively provided with tensile reinforcement ribs.

[0009] The left-hand spiral cross-type auxiliary water-sealing structure and the left-hand spiral cross-type auxiliary water-sealing structure have the same structure and are arranged symmetrically on both sides;

[0010] The left-hand spiral cross-type auxiliary water-tightening structure includes mutually crossed clockwise left-handed water-tightening bars and counterclockwise right-handed water-tightening bars. The outer contours of the cross sections of the clockwise left-handed water-tightening bars and the inner counterclockwise right-handed water-tightening bars are scalene triangles. An internal angle of the scalene triangle is greater than or equal to 90°. The internal angle is the angle formed by a side adjacent to the larger end of the left cone tube and the generatrix of the left cone tube. The angle corresponding to the generatrix of the left cone tube in the scalene triangle is a sharp angle structure.

[0011] A plurality of positioning mushroom heads are evenly arranged along the circumferential direction at the middle parts of the outer circumferences of the left cone tube and the right cone tube.

[0012] By adopting the above technical solution, when connecting adjacent drainage pipes, the left port of the left conical pipe and the right port of the right conical pipe are respectively put on the outside of the right end of a drainage pipe on the left and the outside of the left end of a drainage pipe on the right. The tensile reinforcement ribs and the left spiral cross-type auxiliary water-blocking structure at the left end of the left conical pipe are tightly matched with the outer wall of the drainage pipe on the left. At the same time, the tensile reinforcement ribs and the right spiral cross-type auxiliary water-blocking structure at the right end of the right conical pipe are tightly matched with the outer wall of the drainage pipe on the right. The installation is completed after the right end of the drainage pipe on the left contacts the left side of the positioning folding structure and the left end of the drainage pipe on the right contacts the right side of the positioning folding structure.

[0013] The setting of the tensile reinforcement ribs ensures that the smallest ends of the left cone tube and the right cone tube are not broken when they are installed on the drain pipe.

[0014] The setting of the left-hand spiral cross-type auxiliary water-blocking structure and the right-hand spiral cross-type auxiliary water-blocking structure greatly improves the sealing between the joint and the drainage pipe. Multiple groups of clockwise left-hand water-blocking bars and counterclockwise right-hand water-blocking bars can be set up accordingly, thus forming a comprehensive water-blocking grid on the outer circumference of the drainage pipe.

[0015] The outer contour of the cross-section of the clockwise left-handed water-blocking rib and the counterclockwise right-handed water-blocking rib is a scalene triangle. One interior angle of the scalene triangle is greater than or equal to 90°, preferably 90°. This interior angle is the angle formed by the side closer to the thinner end of the tapered pipe and the generatrix of the sealing ring body. The right side of the scalene triangle is the water-facing surface. This structure enables the long side corresponding to this angle to support the water-facing surface (the docking gap between adjacent drainage pipes is the water leakage point). Part of the pressure generated by the water leakage pressure on the water-facing surface can be decomposed along the radial direction and offset the water pressure inside the drainage pipe, thereby reducing the water pressure in the axial direction and having a stable and reliable sealing performance.

[0016] The angle corresponding to the generatrix of the sealing ring body in the scalene triangle is a sharp angle structure, which can make the clockwise left-handed water-blocking rib and the counterclockwise right-handed water-blocking rib have a better water-blocking effect when press-fitted with the outer circle of the drainage pipe. And it also has a good sealing effect when the outer circle of the drainage pipe is not very round.

[0017] During installation, the positioning folding structure should be ensured to be in a folded state. Installing the connecting ribs can prevent the positioning folding structure from being stretched during installation. After the drainage pipeline is laid and backfilled and compacted, vehicles often drive on the road surface. The drainage pipeline is often under the heavy pressure of the loaded vehicles on the road surface. After the foundation of the drainage pipeline deforms, adjacent two drainage pipes will displace in different directions. At this time, the installed connecting ribs are torn apart and the positioning folding structure is stretched, thereby providing a large axial and angular displacement space for the end of the drainage pipeline. There will be no excessive stress between the positioning folding structure, the left tapered pipe and the right tapered pipe, and it can still play a good water-blocking effect.

[0018] For the connection construction of drainage pipes with a diameter greater than 600 mm, the structure of the present invention can evenly arrange a number of positioning mushroom heads along the circumferential direction in the middle of the outer circumference of the left tapered pipe and the right tapered pipe. After the present invention is connected in place on two drainage pipes, a flexible rectangular cover plate (with connection holes corresponding to the positioning mushroom heads one by one opened on the rectangular cover plate, and the inner diameter of the connection holes is greater than the diameter of the thinner part of the positioning mushroom head and greater than the diameter of the thicker part of the mushroom head) is placed on the top of the present invention. Since the material of the positioning mushroom head is also an elastic material (rubber), it is very easy for the positioning mushroom head to pass upward through the connection holes of the rectangular cover plate, so that the rectangular cover plate is connected to the present invention as a whole. When a huge heavy pressure is applied directly above the connection of the two drainage pipes, the rectangular cover plate plays a role in dispersing the pressure and preventing the stress from concentrating at the ends of the two drainage pipes, reducing the settlement displacement of the end parts of the two drainage pipes. After the relative displacement occurs, it can also play a certain load-bearing role between the two ends of the drainage pipe, avoiding or slowing down the further collapse of the backfill soil, thereby playing a role in protecting the connection of the drainage pipe.

[0019] In summary, the present invention provides a grid-type water-blocking structure on the inner walls of the left conical pipe and the right conical pipe, improving the sealing performance with the outer circumference of the drainage pipe. Meanwhile, an elastic positioning and folding structure is provided between the left conical pipe and the right conical pipe. When the drainage pipe settles and displaces, the elastic positioning and folding structure can expand without damaging the entire joint, thus ensuring good sealing performance that combines static and dynamic states. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a schematic diagram of the external structure of the present invention;

[0021] Figure 2 is Figure 1 the sectional view taken along line A-A in FIG.;

[0022] Figure 3 FIG. is a top view of the present invention when laying a rectangular cover plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0025] As Figure 1 、 Figure 2 and Figure 3 shown, the displacement compensation type double-cone elastic joint for a drainage pipe of the present invention includes a positioning and folding structure 1, a left conical pipe 2, and a right conical pipe 3 integrally made of an elastic material. The left conical pipe 2 has a conical structure that is smaller on the left and larger on the right, and the right conical pipe 3 has a conical structure that is larger on the left and smaller on the right. The left conical pipe 2 and the right conical pipe 3 are symmetrically arranged left and right. The right end of the left conical pipe 2 is integrally connected to the left end of the positioning and folding structure 1, and the left end of the right conical pipe 3 is integrally connected to the right end of the positioning and folding structure 1. The inner wall of the left conical pipe 2 is provided with a left spiral cross-type auxiliary water-blocking structure, and the inner wall of the right conical pipe 3 is provided with a right spiral cross-type auxiliary water-blocking structure.

[0026] The overall positioning and folding structure 1 is a ring structure. The inner diameter of the positioning and folding structure 1 in the folded state is smaller than the outer diameter of the connected drainage pipe. The outer diameter of the positioning and folding structure 1 in the folded state is equal to the maximum outer diameter of the left conical pipe 2 and the right conical pipe 3. The cross-section of the positioning and folding structure 1 along the axial direction is at least one group of U-shaped folds.

[0027] Inside the U-shape of the positioning and folding structure 1, there are installation connecting ribs 9 for connecting the left and right sides. A number of installation connecting ribs 9 are evenly arranged in a circumferential array along the center line direction of the left conical pipe 2 and the right conical pipe 3. The length direction of each installation connecting rib 9 is consistent with the radial direction of the positioning and folding structure 1. At the end of the installation connecting rib 9 far from the positioning and folding structure, there is a V-shaped groove. The V-shaped groove can reduce the pulling force when the installation connecting rib 9 is torn apart when the positioning and folding structure 1 is stretched.

[0028] The maximum inner diameter of the left conical pipe 2 and the right conical pipe 3 is equivalent to the outer diameter of the connected drainage pipe, and the minimum inner diameter of the left conical pipe 2 and the right conical pipe 3 is smaller than the outer diameter of the connected drainage pipe.

[0029] Tensile strengthening ribs 4 are respectively provided at the minimum ends of the left conical pipe 2 and the right conical pipe 3.

[0030] The left spiral cross-type auxiliary water-blocking structure and the right spiral cross-type auxiliary water-blocking structure have the same structure and are symmetrically arranged left and right;

[0031] The left spiral cross-type auxiliary water-blocking structure includes a clockwise left-handed water-blocking rib 5 and a counterclockwise right-handed water-blocking rib 6 that cross each other. The outer contour of the cross-section of the clockwise left-handed water-blocking rib 5 and the inner counterclockwise right-handed water-blocking rib ⑥ is a scalene triangle. One interior angle of the scalene triangle is greater than or equal to 90°. This interior angle is the angle formed by a side adjacent to the larger end of the left conical pipe 2 and the generatrix of the left conical pipe 2. The angle corresponding to the generatrix of the left conical pipe 2 in the scalene triangle is the pointed angle structure 7.

[0032] A number of positioning mushroom heads 8 are evenly arranged along the circumferential direction in the middle of the outer circumference of the left conical pipe 2 and the right conical pipe 3.

[0033] When connecting adjacent drainage pipes for construction, the left port of the left conical pipe 2 and the right port of the right conical pipe 3 are respectively sleeved on the outer part of the right end of a drainage pipe on the left side and the outer part of the left end of a drainage pipe on the right side. The tensile strengthening rib 4 at the left end of the left conical pipe 2 and the left spiral cross-type auxiliary water-blocking structure are both in close fit with the outer wall of the drainage pipe on the left side. At the same time, the tensile strengthening rib 4 at the right end of the right conical pipe 3 and the right spiral cross-type auxiliary water-blocking structure are both in close fit with the outer wall of the drainage pipe on the right side. The installation is completed until the right end of the drainage pipe on the left side contacts the left side of the positioning and folding structure 1 and the left end of the drainage pipe on the right side contacts the right side of the positioning and folding structure 1.

[0034] The provision of the tensile reinforcement rib 4 ensures that the smallest ends of the left cone tube 2 and the right cone tube 3 are not broken when they are installed on the drain pipe.

[0035] The setting of the left-hand spiral cross-type auxiliary water-blocking structure and the left-hand spiral cross-type auxiliary water-blocking structure greatly improves the sealing between the joint and the drainage pipe. Multiple groups of clockwise left-hand water-blocking ribs 5 and counterclockwise right-hand water-blocking ribs 6 can be set accordingly, thus forming a comprehensive water-blocking grid on the outer circumference of the drainage pipe.

[0036] The outer contour of the cross section of the clockwise left-handed water-blocking rib 5 and the inner counterclockwise right-handed water-blocking rib 6 is an unequal-sided triangle. An internal angle of the unequal-sided triangle is greater than or equal to 90°, preferably 90°. The internal angle is the angle formed by an edge adjacent to the thinner end of the tapered tube and the generatrix of the sealing ring body. The right side of the unequal-sided triangle is the water-facing surface. This structure allows the long side corresponding to the angle to support the water-facing surface (the butt gap between adjacent drainage pipes is the leakage point). The pressure generated by the leaking water pressure on the water-facing surface can be decomposed in part in the radial direction, offsetting the water pressure inside the drainage pipe, thereby reducing the water pressure in the axial direction, and having stable and reliable sealing performance.

[0037] The angle corresponding to the generatrix of the sealing ring body in the scalene triangle forms a sharp angle structure 7. This allows the clockwise left-handed water-blocking rib 5 and the counterclockwise right-handed water-blocking rib 6 to press-fit against the outer circumference of the drain pipe, achieving a more effective water-blocking effect. This also provides a good sealing effect even when the outer circumference of the drain pipe is not perfectly round. After the present invention is installed with the two drain pipes, a tensioning band is placed on the outer circumference of the left end of the left tapered pipe 2 and the outer circumference of the right tapered pipe 3 to further tighten the tension, thereby further improving the sealing performance.

[0038] During installation, the positioning folding structure 1 must be ensured to be in a folded state. Installing the entanglement reinforcement 9 can avoid stretching the positioning folding structure 1 during installation. After the drainage pipe is laid and backfilled and compacted, vehicles often drive on the road surface. The drainage pipe will often be subjected to the heavy pressure of heavy vehicles on the road surface. After the foundation of the drainage pipe is deformed, the two adjacent drainage pipes will be displaced in different directions. At this time, the installation entanglement reinforcement 9 is torn apart, and the positioning folding structure 1 is stretched, thereby providing a larger axial and angular displacement space for the end of the drainage pipe. There will be no excessive stress between the positioning folding structure 1, the left cone pipe 2 and the right cone pipe 3, and it can still achieve a good water-tightening effect.

[0039] For the connection construction of drainage pipes with a diameter greater than 600 mm, the structure of the present invention can be provided with a number of positioning mushroom heads 8 evenly along the circumferential direction in the middle of the outer circumferences of the left conical pipe 2 and the right conical pipe 3. After the present invention is connected in place on two drainage pipes, a rectangular cover plate 10 with a certain flexibility (the rectangular cover plate 10 is provided with connection holes corresponding to the positioning mushroom heads 8 one by one, and the inner diameter of the connection holes is greater than the diameter of the thinner part of the positioning mushroom head 8 and greater than the diameter of the thicker part of the mushroom head) is placed on the top of the present invention. Since the material of the positioning mushroom head 8 is also an elastic material (rubber), it is very easy for the positioning mushroom head 8 to pass upward through the connection holes of the rectangular cover plate 10, so that the rectangular cover plate 10 is connected to the present invention as a whole. When a huge heavy pressure is applied directly above the connection of the two drainage pipes, the rectangular cover plate 10 plays a role in dispersing the pressure and preventing stress from concentrating at the ends of the two drainage pipes, reducing the settlement displacement at the end heads of the two drainage pipes. After relative displacement occurs, it can also play a certain load-bearing role between the two ends of the drainage pipe, avoiding or slowing down the further collapse of the backfill soil, thereby playing a role in protecting the connection of the drainage pipes.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The displacement compensation type double-cone elastic joint for drainage pipes is characterized in that: It includes a positioning and folding structure, a left conical pipe, and a right conical pipe, which are integrally made of elastic material. The left conical pipe has a conical structure with a smaller left end and a larger right end, and the right conical pipe has a conical structure with a larger left end and a smaller right end. The left conical pipe and the right conical pipe are symmetrically arranged left and right. The right end of the left conical pipe is integrally connected to the left end of the positioning and folding structure, and the left end of the right conical pipe is integrally connected to the right end of the positioning and folding structure. The inner wall of the left conical pipe is provided with a left spiral cross-type auxiliary water closing structure, and the inner wall of the right conical pipe is provided with a right spiral cross-type auxiliary water closing structure; The positioning and folding structure is an overall ring structure. The inner diameter of the positioning and folding structure in the folded state is smaller than the outer diameter of the connected drainage pipe. The outer diameter of the positioning and folding structure in the folded state is equal to the maximum outer diameter of the left conical pipe and the right conical pipe. The cross-section of the positioning and folding structure along the axial direction is at least one group of U-shaped folds; Inside the U-shaped part of the positioning and folding structure, there are installation connecting ribs for connecting the left and right sides. A number of installation connecting ribs are evenly arranged in a circumferential array along the center line direction of the left conical pipe and the right conical pipe. The length direction of each installation connecting rib is consistent with the radial direction of the positioning and folding structure. At the end of the installation connecting rib far from the positioning and folding structure, there is a V-shaped groove; The left spiral cross-type auxiliary water closing structure and the right spiral cross-type auxiliary water closing structure have the same structure and are symmetrically arranged left and right; The left spiral cross-type auxiliary water closing structures each include a clockwise left-handed water closing rib and a counterclockwise right-handed water closing rib that cross each other. The outer contour of the cross-section of the clockwise left-handed water closing rib and the inner counterclockwise right-handed water closing rib is a scalene triangle. One interior angle of the scalene triangle is greater than or equal to 90°. This interior angle is the angle formed by a side near the larger end of the left conical pipe and the generatrix of the left conical pipe. The angle corresponding to the generatrix of the left conical pipe in the scalene triangle is a sharp angle structure; In the middle of the outer circumference of the left conical pipe and the right conical pipe, a number of positioning mushroom heads are evenly arranged along the circumferential direction.

2. The displacement compensation type double-cone elastic joint for drainage pipes according to claim 1, characterized in that: The inner diameter of the largest end of the left conical pipe and the right conical pipe is equivalent to the outer diameter of the connected drainage pipe, and the inner diameter of the smallest end of the left conical pipe and the right conical pipe is smaller than the outer diameter of the connected drainage pipe.

3. The displacement compensation type double-cone elastic joint for drainage pipes according to claim 1, characterized in that: Tensile strengthening ribs are respectively provided at the smallest ends of the left conical pipe and the right conical pipe.

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