Connecting structure of nodular cast iron pipe
By using a screw connection mechanism of the insert sleeve and the connecting sleeve in the ductile iron pipe connection structure, the coordination of the limit block and the limit groove is used to solve the leakage problem caused by the loose bolts in the prior art, and better sealing and stability are achieved.
Patent Information
- Application Number
- CN202422387881.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-29
AI Technical Summary
The existing ductile iron pipe connection structure is prone to cracks when the bolts are loose, resulting in leakage.
The screw connection mechanism of the insertion sleeve and the connecting sleeve is adopted. Through the coordination of the limiting block and the limiting groove, the fixed connection between the insertion sleeve and the connecting sleeve is achieved to ensure the sealing effect.
It effectively avoids leakage problems caused by loose bolts and ensures the connection sealing and stability of ductile iron pipes.
Smart Images
Figure CN223004601U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipeline connection, in particular to a connection structure of ductile iron pipes. Background Technique
[0002] The main types of groundwater in the field area are bedrock fissure water, occurring in the weathered and tectonic fissures of diopside rock, with weak water-richness and a permeability coefficient of 0.01 - 0.1 m / d. The depth of the groundwater table is generally greater than 5.0 m. The groundwater in the field area is mainly replenished by precipitation, with an annual variation range of 3.0 - 5.0 m. The discharge methods are artificial extraction, underground runoff, and evapotranspiration.
[0003] The inventor found that at least the following problems in the prior art have not been solved. In the prior art, ductile iron pipes are composed of multiple pipe bodies, and the pipe bodies are usually connected by flanges or bolts. When the bolts become loose, it is easy to cause gaps at the connection of the two groups of pipes, resulting in leakage.
[0004] Therefore, we propose a connection structure of ductile iron pipes that can solve the above problems. Content of the Utility Model
[0005] The purpose of the utility model is to provide a connection structure of ductile iron pipes, which solves the problems mentioned in the background technique.
[0006] To achieve the above purpose, the utility model provides the following technical solution: A connection structure of ductile iron pipes, including a first pipe body and a second pipe body, further including an insertion sleeve and a connection sleeve. The connection end of the first pipe body is hermetically connected to the insertion sleeve, and the first pipe body is in communication with the insertion sleeve. The connection end of the second pipe body is hermetically connected to the connection sleeve, and the second pipe body is in communication with the connection sleeve; a rotation connection mechanism: used for the rotation connection of the insertion sleeve and the connection sleeve. The rotation connection mechanism includes a limit block and a limit groove. The number of limit blocks is two groups, and the two groups of limit blocks are symmetrically installed on both sides of the insertion end of the insertion sleeve. The number of limit grooves is two groups, and the two groups of limit grooves are symmetrically opened on both sides of the inner wall of the connection sleeve. The connection sleeve is symmetrically provided with connection grooves on the side connected to the insertion sleeve. The limit block is movably connected to the connection groove and the limit groove; a fixing structure: used for the fixed connection of the insertion sleeve and the connection sleeve. The fixing structure includes a first fixing hole and a second fixing hole. The first fixing hole is opened in the middle of the outside of the limit block. The second fixing holes are symmetrically opened on both sides of the connection sleeve, and the second fixing hole is in communication with one end of the limit groove. The limit block and the connection sleeve are fixedly connected by bolts passing through the first fixing hole and the second fixing hole.
[0007] As an optional solution of the technical solution of the present application, a sealing ring is detachably installed inside the connection sleeve, and the sealing ring is matched with the sizes of the connection sleeve and the insertion sleeve.
[0008] As an alternative embodiment of the technical solution of the present application, the limiting groove is arc-shaped, and the connecting groove communicates with the limiting groove.
[0009] As an alternative embodiment of the technical solution of the present application, the two groups of limiting blocks correspond to the two groups of connecting grooves, and the size of the limiting block matches the connecting groove and the limiting groove.
[0010] As an alternative embodiment of the technical solution of the present application, the insertion end of the insertion sleeve is movably connected to the connection end of the connection sleeve, and the size of the insertion sleeve matches the connection sleeve.
[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows. The two limiting blocks at the insertion end of the insertion sleeve can be inserted into the two connecting grooves on the outer side of the connection sleeve, so that the insertion end of the insertion sleeve is inserted into the interior of the connection sleeve. Since the limiting groove communicates with the connecting groove and the limiting groove is arc-shaped, the insertion sleeve can be rotated so that the limiting block on the outer side of the insertion sleeve is screwed into the limiting groove on the inner wall of the insertion sleeve, which can automatically limit the insertion sleeve. When the limiting block is screwed into the end of the interior of the limiting groove, the first fixing hole on the outer side of the limiting block is aligned with the second fixing hole on the outer side of the connection sleeve, and then a bolt passes through the first fixing hole and the second fixing hole to fixedly connect the insertion sleeve and the connection sleeve together, further realizing the fixation and connection of the first pipe body and the second pipe body, thereby solving the problem that in the existing ductile iron pipe, the loosening of the bolt directly leads to leakage at the pipe connection. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objects, and advantages of the present utility model will become more apparent:
[0013] Figure 1 It is the front view of a connection structure of a ductile iron pipe of the present utility model;
[0014] Figure 2 It is the bottom view of a connection structure of a ductile iron pipe of the present utility model;
[0015] Figure 3 It is the connection schematic diagram of the first pipe body and the second pipe body of a connection structure of a ductile iron pipe of the present utility model.
[0016] In the figure: 1, the first pipe body; 11, the second pipe body; 12, the insertion sleeve; 13, the connection sleeve; 14, the limiting block; 15, the connecting groove; 16, the limiting groove; 17, the first fixing hole; 18, the second fixing hole; 19, the bolt; 2, the sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] Please refer to Figures 1 - 3, the present utility model provides a technical solution: a connection structure for a ductile iron pipe, including a first pipe body 1 and a second pipe body 11, further including an insertion sleeve 12 and a connection sleeve 13. The connection end of the first pipe body 1 is hermetically connected to the insertion sleeve 12, and the first pipe body 1 communicates with the insertion sleeve 12. The connection end of the second pipe body 11 is hermetically connected to the connection sleeve 13, and the second pipe body 11 communicates with the connection sleeve 13; a screwing mechanism: for screwing the insertion sleeve 12 and the connection sleeve 13. The screwing mechanism includes a limiting block 14 and a limiting groove 16. The number of limiting blocks 14 is two groups, and the two groups of limiting blocks 14 are symmetrically installed on both sides of the insertion end of the insertion sleeve 12. The number of limiting grooves 16 is two groups, and the two groups of limiting grooves 16 are symmetrically opened on both sides of the inner wall of the connection sleeve 13. The limiting groove 16 is arc-shaped. On one side of the connection sleeve 13 connected to the insertion sleeve 12, connection grooves 15 are symmetrically opened. The connection grooves 15 communicate with the limiting grooves 16. The two groups of limiting blocks 14 correspond to the two groups of connection grooves 15, and the limiting blocks 14 are movably connected to the connection grooves 15 and the limiting grooves 16. The insertion end of the insertion sleeve 12 is movably connected to the connection end of the connection sleeve 13, and the sizes of the insertion sleeve 12 and the connection sleeve 13 are matched.
[0018] In this technical solution, the two groups of limiting blocks 14 at the insertion end of the insertion sleeve 12 can be inserted into the two groups of connection grooves 15 on the outside of the connection sleeve 13, so that the insertion end of the insertion sleeve 12 is inserted into the inside of the connection sleeve 13. Since the limiting groove 16 communicates with the connection groove 15 and the limiting groove 16 is arc-shaped, the insertion sleeve 12 can be rotated, so that the limiting blocks 14 on the outside of the insertion sleeve 12 are screwed into the limiting grooves 16 on the inner wall of the insertion sleeve 12, which can automatically limit the insertion sleeve 12, ensuring that when the bolts 19 on the outside of the connection sleeve 13 are loose, the insertion sleeve 12 and the connection sleeve 13 can still be stably connected, and the sealing effect is good.
[0019] In this embodiment, a fixing structure: for fixedly connecting the insertion sleeve 12 and the connection sleeve 13; the fixing structure includes a first fixing hole 17 and a second fixing hole 18. The first fixing hole 17 is opened in the middle of the outside of the limiting block 14. The second fixing holes 18 are symmetrically opened on both sides of the connection sleeve 13, and the second fixing holes 18 communicate with one end of the limiting groove 16. The limiting block 14 and the connection sleeve 13 are fixedly connected by a bolt 19 passing through the first fixing hole 17 and the second fixing hole 18.
[0020] In this technical solution, when the limiting block 14 is screwed into the end of the inside of the limiting groove 16, the first fixing hole 17 on the outside of the limiting block 14 is aligned with the second fixing hole 18 on the outside of the connection sleeve 13, and then the bolt 19 passes through the first fixing hole 17 and the second fixing hole 18, so that the insertion sleeve 12 and the connection sleeve 13 are fixedly connected together, further realizing the fixation and communication of the first pipe body 1 and the second pipe body 11.
[0021] In this embodiment, a sealing ring 2 is detachably installed inside the connection sleeve 13, and the sizes of the sealing ring 2, the connection sleeve 13 and the insertion sleeve 12 are matched.
[0022] In this technical solution, the sealing ring 2 is placed inside the connecting sleeve 13. When the insertion end of the insertion sleeve 12 is inserted into the inside of the connecting sleeve 13, the sealing ring 2 can be pressed tightly against the insertion end of the insertion sleeve 12, further improving the connection sealing performance between the insertion sleeve 12 and the connecting sleeve 13.
[0023] When a connection structure of a ductile iron pipe is in use, the two limiting blocks 14 at the insertion end of the insertion sleeve 12 can be inserted into the two connecting grooves 15 on the outside of the connecting sleeve 13, so that the insertion end of the insertion sleeve 12 is inserted into the inside of the connecting sleeve 13. Since the limiting groove 16 communicates with the connecting groove 15 and the limiting groove 16 is arc-shaped, the insertion sleeve 12 can be rotated to make the limiting blocks 14 on the outside of the insertion sleeve 12 screw into the limiting groove 16 on the inner wall of the insertion sleeve 12, which can automatically limit the insertion sleeve 12. When the limiting blocks 14 are screwed into the end of the inside of the limiting groove 16, the first fixing holes 17 on the outside of the limiting blocks 14 are aligned with the second fixing holes 18 on the outside of the connecting sleeve 13. Then, the bolt 19 passes through the first fixing hole 17 and the second fixing hole 18, so that the insertion sleeve 12 and the connecting sleeve 13 are fixedly connected together, further realizing the fixation and connection of the first pipe body 1 and the second pipe body 11. Before the insertion sleeve 12 and the connecting sleeve 13 are connected, the sealing ring 2 is placed inside the connecting sleeve 13. When the insertion end of the insertion sleeve 12 is inserted into the inside of the connecting sleeve 13, the sealing ring 2 can be pressed tightly against the insertion end of the insertion sleeve 12, further improving the connection sealing performance between the insertion sleeve 12 and the connecting sleeve 13. On the contrary, by removing the bolt 19 on the outside of the connecting sleeve 13 and then rotating the insertion sleeve 12 in the reverse direction to align the limiting blocks 14 with the connecting grooves 15, the insertion end of the insertion sleeve 12 can be withdrawn from the connecting sleeve 13, facilitating the disassembly of the first pipe body 1 and the second pipe body 11.
Claims
1. A connection structure of a ductile iron pipe, comprising a first pipe body (1) and a second pipe body (11), characterized in that: It also comprises a plug sleeve (12) and a connecting sleeve (13), wherein the connecting end of the first tube body (1) is sealedly connected to the plug sleeve (12), and the first tube body (1) is in communication with the plug sleeve (12), and the connecting end of the second tube body (11) is sealedly connected to the connecting sleeve (13), and the second tube body (11) is in communication with the connecting sleeve (13); A rotational connection mechanism: used for the rotational connection of the plug sleeve (12) and the connecting sleeve (13), the rotational connection mechanism comprising a limit block (14) and a limit groove (16), the limit blocks (14) being provided in two groups, the two groups of limit blocks (14) being symmetrically installed on both sides of the plug-in end of the plug sleeve (12), the limit grooves (16) being provided in two groups, the two groups of limit grooves (16) being symmetrically arranged on both sides of the inner wall of the connecting sleeve (13), the connecting groove (15) being symmetrically arranged on one side of the connecting sleeve (13) connected to the plug sleeve (12), the limit block (14) being movably connected to the connecting groove (15) and the limit groove (16); A fixing structure: used for fixing the plug sleeve (12) and the connecting sleeve (13); the fixing structure comprises a first fixing hole (17) and a second fixing hole (18); the first fixing hole (17) is arranged in the middle of the outer side of the limiting block (14); the second fixing holes (18) are symmetrically arranged on both sides of the connecting sleeve (13); and the second fixing holes (18) are connected to one end of the limiting groove (16); the limiting block (14) and the connecting sleeve (13) are fixedly connected by bolts (19) penetrating the first fixing hole (17) and the second fixing hole (18).
2. A connection structure of ductile iron pipes according to claim 1, characterized in that: A sealing ring (2) is detachably mounted inside the connecting sleeve (13), and the sealing ring (2) matches the size of the connecting sleeve (13) and the plug sleeve (12).
3. The connection structure of a ductile iron pipe according to claim 1, characterized in that: The limiting groove (16) is arc-shaped, and the connecting groove (15) is connected to the limiting groove (16).
4. The connection structure of a ductile iron pipe according to claim 1, characterized in that: The two groups of limit blocks (14) correspond to the two groups of connection grooves (15), and the sizes of the limit blocks (14) match those of the connection grooves (15) and the limit grooves (16).
5. The connection structure of a ductile iron pipe according to claim 1, characterized in that: The plug-in end of the plug sleeve (12) is movably connected to the connecting end of the connecting sleeve (13), and the sizes of the plug sleeve (12) and the connecting sleeve (13) match.