Straight-wall pipe three-step structure connector

Abstract

The utility model relates to the field of pipe connecting structures, in particular to a straight wall pipe three-step structure connector. The locking device comprises a sleeve and a locking table. The sleeve comprises an outer sleeve part, a connecting ring part and an inner sleeve part which are connected in sequence; the locking table is arranged on the peripheral face of the inner cylinder part, the outer side face of the locking table is a circular interference connection face, and the inner diameter of the outer cylinder part, the outer diameter of the locking table and the outer diameter of the inner cylinder part are sequentially reduced. The sealing device can be blocked at the end of the corrugated pipe, the dislocation range between the sealing device and the corrugated pipe is limited, and the sealing performance is prevented from being affected by the large dislocation degree.

Description

Technical Field

[0001] This utility model relates to the field of pipe connection structures, and in particular to a three-stage structure connector for straight-walled pipes. Background Technology

[0002] Corrugated pipes are currently widely used in water supply systems, sewage systems, and municipal drainage systems. When laying multiple pipes, connecting structures are needed to connect any two adjacent corrugated pipes to assemble them into a complete pipeline.

[0003] The existing bellows connection method mainly involves inserting it into the inside of the sleeve for connection. The outer circumference of the bellows and the inner wall of the sleeve are sealed together by a rubber ring. However, after long-term use, misalignment between the bellows and the sleeve may occur. If the misalignment is large, it will affect the sealing performance. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a three-stage structure connector for straight-walled pipes, which can block the end of the corrugated pipe, limit the misalignment range between the connector and the corrugated pipe, and prevent the sealing performance from being affected by a large degree of misalignment.

[0005] The technical solution of this utility model is a three-stage structure connector for straight-walled pipes, including a sleeve and a locking platform; the sleeve includes an outer cylinder, a connecting ring, and an inner cylinder connected in sequence; the locking platform is disposed on the outer circumferential surface of the inner cylinder, and the outer side of the locking platform is a circular interference fit surface, and the inner diameter of the outer cylinder, the outer diameter of the locking platform, and the outer diameter of the inner cylinder decrease in sequence.

[0006] Preferably, the outer cylinder is provided with multiple through holes.

[0007] Preferably, the outer end of the outer cylinder has a flared portion.

[0008] Preferably, the inner circumferential surface of the outer cylinder has a first groove, and the outer circumferential surface of the inner cylinder has a second groove.

[0009] Preferably, the outer cylinder is provided with multiple sets of insertion holes, each set of insertion holes including two locking holes, and a locking fastener is provided at the locking hole, the locking fastener having a U-shaped structure.

[0010] Preferably, the outer cylinder portion has an outwardly protruding ring portion, and the ring portion has a limiting groove that gradually slopes outward along the direction from the outer end of the inner cylinder portion to the outer end of the outer cylinder portion.

[0011] Preferably, the connecting ring, inner cylinder, and locking platform are integrally connected.

[0012] Preferably, a set of pressure injection holes and pressure holes are provided on the outer cylinder or connecting ring.

[0013] Preferably, reinforcing ribs are provided on the outer periphery of both the outer cylinder and the inner cylinder.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects:

[0015] In this invention, for the two bellows being connected, one bellows is inserted inside the outer cylinder, and the other bellows is fitted around the outer periphery of the inner cylinder. The inner circumferential surface of the other bellows is interference-fitted into the interference connection surface on the outside of the locking platform, thus improving the connection reliability. The opposite ends of the two bellows are located on both sides of the connecting ring, and the connecting ring limits the range of misalignment of the two bellows, preventing large misalignments from affecting the sealing performance of the rubber ring. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model when applied to a bellows connection;

[0017] Figure 2 for Figure 1 Structural sectional view;

[0018] Figure 3 Exploded view of the sleeve and fastener structure;

[0019] Figure 4 This is a cross-sectional view of the structure of Embodiment 2 of this utility model when applied to a bellows connection;

[0020] Figure 5 This is a schematic diagram of the limit buckle.

[0021] Reference numerals: 1. Sleeve; 11. Outer cylinder; 111. Locking hole; 112. Through hole; 113. Protruding ring; 12. Connecting ring; 13. Inner cylinder; 131. Locking groove two; 2. Locking platform; 3. Fastener; 4. Reinforcing rib; 51. Rubber ring one; 52. Rubber ring two; 6. Limiting buckle; 61. Loop ring; 62. End plate; 63. Limiting plate. Detailed Implementation

[0022] Example 1

[0023] like Figures 1-3 As shown in the figure, the three-stage structure connector for straight-walled pipes proposed in this embodiment includes a sleeve 1 and a locking platform 2.

[0024] The sleeve 1 includes an outer cylinder portion 11, a connecting ring portion 12, and an inner cylinder portion 13 connected in sequence. To further reduce the weight and material usage of the sleeve 1, a plurality of through holes 112 are provided on the outer cylinder portion 11. In addition, the outer end of the outer cylinder portion 11 has a flared portion to facilitate the insertion of a straight-walled corrugated pipe into the inner side of the outer cylinder portion 11.

[0025] like Figure 2 and Figure 3As shown, the locking platform 2 is located on the outer circumferential surface of the inner cylinder 13. The outer surface of the locking platform 2 is a circular interference fit surface, used for interference fit with the inner circumferential surface of the bellows. The inner diameter of the outer cylinder 11, the outer diameter of the locking platform 2, and the outer diameter of the inner cylinder 13 decrease sequentially, forming a three-tiered structure.

[0026] The outer cylinder 11 is provided with multiple sets of insertion holes, each set including two locking holes 111. A locking element 3 is inserted into each locking hole 111. The locking element 3 has a U-shaped structure and possesses a certain degree of elasticity. After the corrugated pipe is inserted into the target position inside the outer cylinder 11, with the troughs of the corrugated pipe facing the locking holes 111, the two ends of the locking element 3 are deformed by pinching them. Then, the locking element 3 is inserted into the locking holes 111, with both ends extending into the troughs of the corrugated pipe, thus limiting the installation of the corrugated pipe. It should be noted that, according to actual design needs, the locking holes 111 can be arranged in pairs, with multiple sets of locking holes 111 distributed circumferentially along the outer periphery of the outer cylinder 11. Multiple rows are set along the opening of the outer cylinder 11 towards the position where the rubber ring 51 is placed inside the outer cylinder 11. Then, as needed, the buckle 3 and a set of locking holes 111 are installed together in the use state. The remaining locking holes 111 serve as through holes 112, which can reduce weight and material usage.

[0027] The inner circumferential surface of the outer cylinder 11 has a first groove, and the outer circumferential surface of the inner cylinder 13 has a second groove 131. The first groove and the second groove 131 are used to insert the first rubber ring 51 and the second rubber ring 52, respectively, to ensure the stability of the two corrugated pipes after installation.

[0028] To enhance the structural strength of the sleeve 1, reinforcing ribs 4 are provided on the outer periphery of both the outer cylinder 11 and the inner cylinder 13.

[0029] This embodiment utilizes the connecting ring 12 to stop the bellows end, limiting the misalignment range between the bellows and the pipes and preventing significant misalignment from affecting the sealing performance. For the two bellows being connected, one bellows is inserted inside the outer cylinder 11 and sealed by a rubber ring 51; the other bellows is fitted around the outer circumference of the inner cylinder 13 and sealed by a rubber ring 52. The inner circumference of this second bellows is also interference-fitted to the outer side of the locking plate 2, improving connection reliability. The opposite ends of the two bellows are located on either side of the connecting ring 12. The connecting ring 12 limits the range of misalignment between the two bellows, preventing significant misalignment from affecting the sealing performance of the rubber rings.

[0030] Example 2

[0031] like Figure 4 and Figure 5As shown in this embodiment, a three-tiered connector for straight-walled pipes is proposed. Compared to Embodiment 1, in this embodiment, the outer cylinder portion 11 has an outwardly protruding convex ring portion 113. The convex ring portion 113 has a limiting groove that gradually slopes outward from the outer end of the inner cylinder portion 13 to the outer end of the outer cylinder portion 11. The limiting groove is for the limiting buckle 6 to be inserted. The limiting buckle 6 includes a semi-circular collar portion 61, two end plate portions 62 respectively disposed at both ends of the collar portion 61, and a plurality of limiting plate portions 63 distributed around the collar portion 61. The limiting plate portions 63 are inclinedly distributed. The collar portion 61, the end plate portions 62, and the limiting plate portions 63 are integrally formed, and the end plate portions 62 have connecting holes.

[0032] In this embodiment, when connecting two bellows, the two limiting buckles 6 are first fitted onto the trough of one bellows to form a complete ring, and then fastened at the connection hole with bolts and nuts. This trough is located on the side of the rubber ring 51 away from the inner cylinder 13. When one of the bellows fitted with the limiting buckle 6 is inserted into the inner side of the outer cylinder 11, the limiting plate 63 is deformed by the inner circumferential surface of the outer cylinder 11. After the bellows is fully inserted, the limiting plate 63 rebounds and engages with the limiting groove of the convex ring 113, thus limiting the bellows and the outer cylinder 11.

[0033] Example 3

[0034] This embodiment proposes a three-stage structure connector for straight-walled pipes. Compared with Embodiment 1, in this embodiment, the connecting ring 12, the inner cylinder 13, and the locking platform 2 are integrally connected and can be integrally processed to directly obtain the three-stage structure.

[0035] Example 4

[0036] This embodiment proposes a three-stage structure connector for straight-walled pipes. Compared to Embodiment 1, in this embodiment, a set of pressure injection holes and pressure holes are provided on the outer cylinder portion 11 or the connecting ring portion 12. In this case, the bellows end located inside the outer cylinder portion 11 does not abut against the connecting ring portion 12, i.e., a gap is left between the bellows and the connecting ring portion 12. Both the pressure injection holes and pressure holes communicate with this gap, facilitating water or gas injection and pressure detection.

[0037] In this embodiment, both the pressure injection port and the pressure port are sealed with sealing plugs by default. When it is necessary to test the sealing performance of this connector, the sealing plugs are removed, and the outer ends of the two bellows connected to this connector are sealed. The pressure injection port is connected to an external water injection device or an air injection device, and the pressure port is connected to an external pressure testing device. Water is injected into the pipeline through the water injection device, or air is injected into the pipeline through the air injection device. After the injection is completed, the water pressure or air pressure is tested through the corresponding pressure testing device to test the water tightness of the connector. If the tested pressure value is lower than the preset value, it indicates that a leak has occurred. If the tested pressure value reaches the preset value, it indicates that the connector is of qualified quality and can achieve effective water tightness sealing. By testing the sealing performance of each individual connector, the water tightness of each connector can be detected, which facilitates timely handling and ensures construction progress, and also facilitates subsequent pipeline maintenance.

[0038] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A three-stage structure connector for straight-walled pipes, characterized in that, include: The sleeve (1) includes an outer cylinder (11), a connecting ring (12) and an inner cylinder (13) connected in sequence; The locking platform (2) is set on the outer circumferential surface of the inner cylinder (13). The outer side is a circular interference connection surface. The inner diameter of the outer cylinder (11), the outer diameter of the locking platform (2) and the outer diameter of the inner cylinder (13) decrease in sequence.

2. The three-stage structure connector for straight-walled pipes according to claim 1, characterized in that, The outer cylinder (11) is provided with multiple through holes (112).

3. The three-stage structure connector for straight-walled pipes according to claim 1, characterized in that, The outer end of the outer cylinder (11) has a flared opening.

4. The three-stage structure connector for straight-walled pipes according to claim 1, characterized in that, The inner circumferential surface of the outer cylinder (11) has a first groove, and the outer circumferential surface of the inner cylinder (13) has a second groove (131).

5. A three-stage structure connector for straight-walled pipes according to claim 1, characterized in that, The outer cylinder (11) is provided with multiple sets of insertion holes, each set of insertion holes including two locking holes (111), and a locking fastener (3) is provided at the locking hole (111), the locking fastener (3) is a U-shaped structure.

6. A three-stage structure connector for straight-walled pipes according to claim 1, characterized in that, The outer cylinder (11) has an outwardly protruding ring (113), and the ring (113) has a limiting groove that gradually slopes outward from the outer end of the inner cylinder (13) to the outer end of the outer cylinder (11).

7. A three-stage structure connector for straight-walled pipes according to claim 1, characterized in that, The connecting ring (12), the inner cylinder (13) and the locking plate (2) are integrally connected.

8. A three-stage structure connector for straight-walled pipes according to claim 1, characterized in that, A set of pressure injection holes and pressure holes are provided on the outer cylinder (11) or the connecting ring (12).

9. A three-stage structure connector for straight-walled pipes according to claim 1, characterized in that, Both the outer cylinder (11) and the inner cylinder (13) are provided with reinforcing ribs (4) on their outer periphery.

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