Nodular cast iron pipe fitting convenient to disassemble and assemble

Abstract

The utility model discloses a nodular cast iron pipe fitting convenient to disassemble and assemble. The nodular cast iron pipe fitting comprises a first pipe fitting and a second pipe fitting, a connecting sinking groove is formed in one end of the first pipe fitting, a first annular groove is formed in the circumferential surface of the inner wall of the connecting sinking groove, and a plurality of movable limiting pieces are arranged in the first annular groove; a connector part is formed at one end of the second pipe fitting, is inserted into the connecting sinking groove and abuts against the inner wall of the connecting sinking groove, and an annular table is formed on the peripheral face of the end, close to the second pipe fitting, of the connector part; a driving part is arranged on the first pipe fitting, all the movable limiting parts are connected with the driving part, the driving part can drive one ends of all the movable limiting parts to stretch out of the first annular groove, and the ends, stretching out of the first annular groove, of the movable limiting parts are attached to the outer wall, close to the second pipe fitting, of the annular table. According to the utility model, disassembly and connection between pipe fittings are facilitated, the operation is convenient, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ductile iron pipes, in particular to a ductile iron pipe fitting which is easy to assemble and disassemble. Background Art

[0002] Ductile iron pipe fittings are pipes made by centrifugally casting molten iron at high speed using a centrifugal ductile iron casting machine after adding a nodulizing agent. Ductile iron pipe fittings offer advantages such as high strength, high elongation, impact resistance, corrosion resistance, and excellent sealing properties. They are widely used in municipal piping projects, electromechanical installation projects, and outdoor pipeline installation projects. Existing ductile iron pipe fittings are often connected using flanges. Flanges are welded to the ends of each fitting and then secured by threading and tightening several bolts through the flanges. This connection method is cumbersome and inconvenient to assemble and disassemble, reducing the efficiency of ductile iron pipe assembly and disassembly. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a ductile iron pipe fitting that is easy to disassemble and assemble, which is convenient for disassembly, assembly and connection between the pipe fittings, easy to operate and improves assembly efficiency.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a ductile iron pipe fitting that is easy to disassemble and assemble, comprising a first pipe fitting and a second pipe fitting that are coaxially connected; a connecting groove is formed at one end of the first pipe fitting close to the second pipe fitting, a first annular groove is formed on the circumference of the inner wall of the connecting groove, and a plurality of movable limit members are arranged in the first annular groove;

[0005] A joint portion is formed on one end of the second pipe member close to the first pipe member, the joint portion is inserted into the connecting groove and abuts against the inner wall of the connecting groove, and a ring platform is formed on the outer peripheral surface of one end of the joint portion close to the second pipe member;

[0006] A driving member is provided on the first pipe member, and each of the movable limiting members is connected to the driving member. The driving member can drive one end of each movable limiting member to extend out of the first annular groove, and the end of the movable limiting member extending out of the first annular groove is attached to the outer wall of the ring platform close to the second pipe member.

[0007] Furthermore, the movable limiting member includes a limiting claw, a rotating shaft and a transmission gear. The rotating shaft is passed through and fixed to one end of the limiting claw, and both ends of the rotating shaft pass through the inner wall of the first annular groove and are rotatably connected to the first pipe fitting. The transmission gear is located on one side of the limiting claw, and the inner wall of the first annular groove is provided with a groove for installing the transmission gear. The transmission gear is coaxially fixed with the rotating shaft; the driving member includes a driving ring, and a second annular groove is provided on the outer circumference of the first pipe fitting at a position corresponding to the positive projection of the transmission gear. The driving ring is sleeved in the second annular groove of the first pipe fitting, and the second annular groove is connected to each groove. The inner ring of the driving ring is formed with a plurality of gear parts, and the gear parts are meshed with the transmission gear.

[0008] Furthermore, two opposite inner side walls of the second annular groove are provided with sealing grooves, and a sealing ring is provided in the sealing grooves.

[0009] Furthermore, when the limiting claw extends out of the first annular groove under the action of the driving member, the end surface of the limiting claw away from the rotating shaft is in contact with the outer peripheral surface of the joint part.

[0010] Furthermore, a pull ring is fixed on the outer circumference of the driving ring, and a connecting hole seat is provided on the outer circumference of one end of the first pipe member close to the second pipe member, and both the pull ring and the connecting hole seat are provided with through holes;

[0011] When the limiting claw extends out of the first annular groove and abuts against the outer wall of the joint portion, the pull ring moves to be coaxial with the connecting hole seat, and a locking bolt is passed through the pull ring and the connecting hole seat.

[0012] Beneficial effects of the utility model:

[0013] The utility model discloses a ductile iron pipe fitting that is easy to disassemble and assemble. When connecting the pipe fittings, the drive ring is rotated, the gear portion engages with the transmission gear, and the limiting claw is driven to rotate by the rotating shaft, so that one end of the limiting claw deflects and extends out of the first annular groove until it abuts the outer wall of the joint portion. Since the limiting claw is located on the side of the ring platform close to the second pipe fitting and abuts the side wall of the ring platform, the connection between the first pipe fitting and the second pipe fitting is achieved. Conversely, by rotating the drive ring in the opposite direction, the limiting claw can be retracted into the first annular groove, thereby separating the first pipe fitting and the second pipe fitting, effectively improving the efficiency of pipe fitting disassembly and assembly, convenient operation, and better practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the local structure of the pipe fittings when connected in the utility model.

[0015] Figure 2 It is a partial structural diagram of the second pipe in the utility model.

[0016] Figure 3 It is a structural schematic diagram for reflecting the movable limiting member on the first pipe member in the utility model.

[0017] Figure 4 It is a schematic diagram of the partial structure of the first pipe fitting in the utility model.

[0018] Figure 5 It is a structural diagram of the movable limiting member in the utility model.

[0019] Figure 6 It is a partial cross-sectional view of the pipe connection in the utility model.

[0020] In the figure: 1. First pipe fitting; 11. Connecting trough; 12. First annular groove; 13. Second annular groove; 131. Sealing ring; 14. Groove; 15. Connecting hole seat; 2. Movable limiting member; 21. Limiting claw; 22. Rotating shaft; 23. Transmission gear; 3. Driving ring; 31. Gear part; 32. Pull ring; 4. Second pipe fitting; 41. Joint part; 42. Ring platform. DETAILED DESCRIPTION

[0021] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0022] The utility model discloses a ductile iron pipe fitting which is easy to assemble and disassemble.

[0023] Reference Figures 1 to 3 A ductile iron pipe fitting that is easy to disassemble and assemble includes a first pipe fitting 1 and a second pipe fitting 4 that are coaxially connected; a connecting groove 11 is formed at one end of the first pipe fitting 1 close to the second pipe fitting 4, and a first annular groove 12 is formed on the circumference of the inner wall of the connecting groove 11, and a plurality of movable limit members 2 are arranged in the first annular groove 12; a joint portion 41 is formed at one end of the second pipe fitting 4 close to the first pipe fitting 1, the joint portion 41 is inserted into the connecting groove 11 and abuts against the bottom surface of the connecting groove 11, and a ring platform 42 is integrally formed on the outer circumference of one end of the joint portion 41 close to the second pipe fitting 4.

[0024] A driving member is provided on the first pipe fitting 1, and each movable limiting member 2 is connected to the driving member. The driving member can drive one end of each movable limiting member 2 to extend out of the first annular groove 12, and the end of the movable limiting member 2 extending out of the first annular groove 12 is attached to the outer wall of the ring platform 42 close to the second pipe fitting 4, thereby limiting the axial movement of the second pipe fitting 4, thereby realizing the connection and fixation of the first pipe fitting 1 and the second pipe fitting 4.

[0025] Reference Figures 3 to 6 The movable limiting member 2 includes a limiting claw 21, a rotating shaft 22 and a transmission gear 23. The rotating shaft 22 is passed through and fixed to one end of the limiting claw 21. Both ends of the rotating shaft 22 pass through the inner wall of the first annular groove 12 and are rotatably connected to the first pipe 1. The transmission gear 23 is located on one side of the limiting claw 21, and the inner wall of the first annular groove 12 is provided with a groove 14 for installing the transmission gear 23. The transmission gear 23 is coaxially fixed with the rotating shaft 22.

[0026] Reference Figures 3 to 6The drive member includes a drive ring 3. A second annular groove 13 is formed on the outer circumference of the first pipe member 1 at a position corresponding to the orthogonal projection of the transmission gear 23. The drive ring 3 is sleeved within the second annular groove 13 of the first pipe member 1. The drive ring 3 is rotatably connected to the first pipe member 1. The outer walls of each groove 14 are connected to the second annular groove 13. The inner ring of the drive ring 3 is formed with a plurality of gear portions 31, which mesh with the transmission gear 23. By rotating the drive ring 3, the gear portions 31 on the drive ring 3 mesh with the transmission gear 23, driving the limiting pawl 21 to rotate via the rotating shaft 22. This causes one end of the limiting pawl 21, which was originally hidden in the first annular groove 12, to deflect and extend out of the first annular groove 12 until the limiting pawl 21 abuts the outer wall of the joint portion 41. Since the limiting pawl 21 is located on the side of the annular platform 42 close to the second pipe member 4 and abuts the side wall of the annular platform 42, the connection between the first pipe member 1 and the second pipe member 4 is achieved. On the contrary, by rotating the driving ring 3 in the reverse direction, the limiting claw 21 can be received into the first ring groove 12, thereby separating the first pipe 1 and the second pipe 4, effectively improving the efficiency of disassembly and assembly of the pipes.

[0027] When the limiting claw 21 extends out of the first annular groove 12 under the action of the driving member, the end surface of the limiting claw 21 away from the rotating shaft 22 is in contact with the outer peripheral surface of the joint portion 41 to prevent the limiting claw 21 from scratching the surface of the joint portion 41.

[0028] Reference Figure 1 In order to facilitate the rotation of the driving ring 3, a pull ring 32 is welded on the outer circumference of the driving ring 3; in addition, a connecting hole seat 15 is provided on the outer circumference of one end of the first pipe 1 close to the second pipe 4, and both the pull ring 32 and the connecting hole seat 15 are provided with through holes; when the limiting claw 21 extends out of the first ring groove 12 and abuts against the outer wall of the joint part 41, the pull ring 32 moves to the coaxial line between the through hole and the connecting hole seat 15, and a locking bolt is passed between the pull ring 32 and the connecting hole seat 15; the position of the driving ring 3 is locked and fixed by the locking bolt to ensure the firmness of the connection between the first pipe 1 and the second pipe 4.

[0029] Reference Figure 6 Since the second annular groove 13 and the groove 14 are connected, in order to ensure the sealing of the first pipe 1 and the second pipe 4, sealing grooves are opened on the two opposite inner walls of the second annular groove 13, and a sealing ring 131 is provided in the sealing groove to prevent the conveying medium from leaking from the gap between the second annular groove 13 and the de-drive ring 3.

[0030] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A ductile iron pipe fitting that is easy to disassemble and assemble, characterized in that: The invention comprises a first pipe (1) and a second pipe (4) which are coaxially connected; a connecting groove (11) is provided at one end of the first pipe (1) close to the second pipe (4); a first annular groove (12) is provided on the circumference of the inner wall of the connecting groove (11); and a plurality of movable stoppers (2) are provided in the first annular groove (12); A joint portion (41) is formed on one end of the second pipe member (4) close to the first pipe member (1), the joint portion (41) is inserted into the connecting groove (11) and abuts against the inner wall of the connecting groove (11), and a ring platform (42) is formed on the outer peripheral surface of one end of the joint portion (41) close to the second pipe member (4); A driving member is provided on the first pipe member (1), and each of the movable limiting members (2) is connected to the driving member. The driving member can drive one end of each movable limiting member (2) to extend out of the first annular groove (12), and the end of the movable limiting member (2) extending out of the first annular groove (12) is attached to the outer wall of the ring platform (42) close to the second pipe member (4).

2. The ductile iron pipe fitting that is easy to assemble and disassemble according to claim 1, characterized in that: The movable limiting member (2) comprises a limiting claw (21), a rotating shaft (22) and a transmission gear (23); the rotating shaft (22) is passed through and fixed to one end of the limiting claw (21); both ends of the rotating shaft (22) pass through the inner wall of the first annular groove (12) and are rotatably connected to the first pipe (1); the transmission gear (23) is located on one side of the limiting claw (21); and the inner wall of the first annular groove (12) is provided with a groove (14) for installing the transmission gear (23); the transmission gear (23) is provided with a groove (14) for installing the transmission gear (23); and the transmission gear (23) is provided with a groove (14) for installing the transmission gear (23). ) is coaxially fixed with the rotating shaft (22); the driving member includes a driving ring (3); a second annular groove (13) is provided on the outer circumference of the first pipe member (1) at a position corresponding to the positive projection of the transmission gear (23); the driving ring (3) is sleeved in the second annular groove (13) of the first pipe member (1); the second annular groove (13) is communicated with each groove (14); a plurality of gear parts (31) are formed on the inner ring of the driving ring (3); the gear parts (31) are meshed with the transmission gear (23).

3. The ductile iron pipe fitting that is easy to assemble and disassemble according to claim 2, characterized in that: Two opposite inner side walls of the second annular groove (13) are provided with sealing grooves, and a sealing ring (131) is provided in the sealing grooves.

4. The ductile iron pipe fitting that is easy to assemble and disassemble according to claim 3, characterized in that: When the limiting claw (21) extends out of the first annular groove (12) under the action of the driving member, the end surface of the limiting claw (21) away from the rotating shaft (22) is in contact with the outer peripheral surface of the joint portion (41).

5. The ductile iron pipe fitting that is easy to assemble and disassemble according to claim 4, characterized in that: A pull ring (32) is fixed to the outer circumference of the driving ring (3); a connecting hole seat (15) is provided on the outer circumference of one end of the first pipe (1) close to the second pipe (4); and both the pull ring (32) and the connecting hole seat (15) are provided with through holes; When the limiting claw (21) extends out of the first annular groove (12) and abuts against the outer wall of the joint portion (41), the pull ring (32) moves to be coaxial with the connecting hole seat (15), and a locking bolt is passed between the pull ring (32) and the connecting hole seat (15).

Images