Anti-disengaging connector structure of nodular cast iron pipe

Abstract

The utility model provides an anti-drop interface structure of a nodular cast iron pipe, and relates to the technical field of nodular cast iron pipe connecting devices, the anti-drop interface structure comprises a nodular cast iron pipe, assembling discs and a corrugated pipe, a plurality of threaded rods are arranged between the adjacent assembling discs, and a connecting mechanism is arranged between the corrugated pipe and the nodular cast iron pipe; the clamping barrels at the two ends of the corrugated pipe are plugged into one ends of the nodular cast iron pipes respectively, the inner supporting barrels are screwed to move towards the interiors of the clamping barrels, the two nodular cast iron pipes are driven to be close to each other, and the inner supporting barrels jack one ends of the clamping barrels to move outwards so that the outer walls of the clamping barrels and the inner walls of the nodular cast iron pipes can be tensioned. The nodular cast iron pipes and the inner supporting cylinder are connected together, at the moment, the two nodular cast iron pipes communicate with each other through the corrugated pipe, one end of a threaded rod penetrates out of a connecting hole of the other assembling disc from a connecting hole in one assembling disc, nuts are screwed at the two ends of the threaded rod, and the positions of the two nodular cast iron pipes are completely locked.

Description

Technical Field

[0001] The utility model relates to the technical field of ductile iron pipe connection devices, in particular to an anti-disconnection interface structure for ductile iron pipes. Background Technique

[0002] Cast iron steel pipes are actually ductile iron pipes. Due to the fact that ductile iron pipes have the essence of iron and the performance of steel, they have this name. In ductile iron pipes, graphite exists in a spherical form, and generally the size of graphite is grade 6-7. In terms of quality, the spheroidization grade of cast iron pipes is required to be controlled at grade 1-3, and the spheroidization rate ≥ 80%. Therefore, the mechanical properties of the material itself have been improved well, having the essence of iron and the performance of steel. After annealing, the metallographic structure of ductile iron pipes is ferrite plus a small amount of pearlite, and the mechanical properties are good;

[0003] At present, ductile iron pipes are mainly used for water supply, gas transmission, etc. in municipal industrial and mining enterprises. The installation of ductile iron pipes adopts the method of pipeline matching interface fittings. Existing interface fittings need to be installed at both ends of the pipeline. One pipeline requires two fittings, which increases the production cost. Moreover, once one end is not fixed properly, it is easy to cause the pipeline to become disconnected, affecting the service life. Therefore, the utility model proposes an anti-disconnection interface structure for ductile iron pipes to solve the above problems. Content of the Utility Model

[0004] In view of the above problems, the utility model proposes an anti-disconnection interface structure for ductile iron pipes to solve the problems of cumbersome two fittings required for one pipeline and unstable connection in the prior art.

[0005] To achieve the purpose of the utility model, the utility model is realized through the following technical solutions: an anti-disconnection interface structure for ductile iron pipes, including a ductile iron pipe, an assembly disc, and a corrugated pipe. One end of the ductile iron pipe is provided with an assembly disc. A plurality of threaded rods are arranged between adjacent assembly discs. A corrugated pipe is arranged between adjacent ductile iron pipes. A connection mechanism is arranged between the corrugated pipe and the ductile iron pipe.

[0006] Further improvement lies in: The connection mechanism includes a clamping cylinder, an inner support cylinder, and a threaded surface. Clamping cylinders are symmetrically arranged at both ends of the corrugated pipe. An inner support cylinder is arranged inside the clamping cylinder. A plurality of dividing grooves are arranged at one end of the inner support cylinder. The outer wall of one end of the clamping cylinder is in fitting connection with the inner wall of the ductile iron pipe.

[0007] Further improvement lies in: One end of the clamping cylinder is provided with an inwardly concave conical surface. Threaded surfaces are arranged on the outer wall of the inner support cylinder and the inner wall of the clamping cylinder. The inner support cylinder is threadedly connected to the end of the clamping cylinder away from the conical surface through the threaded surface.

[0008] A further improvement lies in that a retaining ring is provided at one end of the clamping cylinder away from the partition groove, a stepped groove is provided inside one end of the ductile iron pipe, and the outer wall of the retaining ring is engaged with the inner wall of the stepped groove.

[0009] A further improvement lies in that both ends of the threaded rod penetrate through the inner wall of the adjacent assembly disc and are threadedly connected with nuts, sealing bearings are symmetrically provided at both ends of the corrugated pipe, and the corrugated pipe is rotatably connected with the inner support cylinder through the sealing bearings.

[0010] A further improvement lies in that a connecting seat is fixedly connected to the outside of the sealing bearing, rotating shafts are symmetrically fixedly connected to the top end and the bottom end of the connecting seat, a rotating rod is provided between the connecting seats parallel to each other before and after, and both ends of the rotating rod are hinged to the two connecting seats through the rotating shafts respectively.

[0011] A further improvement lies in that an annular groove is provided on the outside of the inner support cylinder, a plurality of balls are provided inside the annular groove, a sealing ring is provided inside the sealing bearing, and the annular groove is hinged to the sealing ring through the balls.

[0012] The beneficial effects of the present utility model are as follows: The clamping cylinders at both ends of the corrugated pipe are respectively inserted into the inside of one end of the ductile iron pipe, the inner support cylinder is screwed to move towards the inside of the clamping cylinder, and drives the two ductile iron pipes to approach each other. The inner support cylinder pushes one end of the clamping cylinder to move outwards, so as to tension the outer wall of the clamping cylinder and the inner wall of the ductile iron pipe, and connect the ductile iron pipe and the inner support cylinder together. At this time, the two ductile iron pipes are interconnected through the corrugated pipe. One end of the threaded rod penetrates through the connecting hole inside one assembly disc and then through the connecting hole of the other assembly disc, and nuts are tightened at both ends of the threaded rod to completely lock the positions of the two ductile iron pipes, making the connection between the two ductile iron pipes more compact. Description of the Drawings

[0013] Figure 1 is the front view of the present utility model;

[0014] Figure 2 is the schematic diagram of the internal structure of the clamping cylinder of the present utility model;

[0015] Figure 3 is the schematic diagram of the internal structure of the sealing bearing of the present utility model.

[0016] Wherein: 1, ductile iron pipe; 2, assembly disc; 3, corrugated pipe; 4, clamping cylinder; 5, inner support cylinder; 6, threaded surface; 7, threaded rod; 8, nut; 9, connecting seat; 10, rotating rod; 11, sealing bearing; 12, annular groove; 13, ball; 14, sealing ring; 15, partition groove. Detailed Implementation Manner

[0017] To deepen the understanding of the present utility model, the present utility model will be further described in detail below in conjunction with embodiments. These embodiments are only used to explain the present utility model and do not constitute a limitation to the protection scope of the present utility model.

[0018] According to Figure 1 、 2 、as shown in Figure 3, this embodiment proposes an anti-disconnection interface structure for ductile iron pipes, including a ductile iron pipe 1, an assembly disc 2, and a corrugated pipe 3. One end of the ductile iron pipe 1 is provided with an assembly disc 2. A plurality of threaded rods 7 are provided between adjacent assembly discs 2. A corrugated pipe 3 is provided between adjacent ductile iron pipes 1. A connection mechanism is provided between the corrugated pipe 3 and the ductile iron pipe 1. Place the ends of two ductile iron pipes 1 with assembly discs 2 facing each other, and then insert the connection mechanisms at both ends of the corrugated pipe 3 into the interior of the ductile iron pipe 1. Use the connection mechanism to connect the two ends of the corrugated pipe 3 to the two ductile iron pipes 1 respectively. At this time, the two ductile iron pipes 1 are interconnected. Then insert the threaded rod 7 between two parallel assembly discs 2 before and after to lock the position.

[0019] The connection mechanism includes a clamping cylinder 4, an inner support cylinder 5, and a threaded surface 6. Clamping cylinders 4 are symmetrically provided at both ends of the corrugated pipe 3. An inner support cylinder 5 is provided inside the clamping cylinder 4. One end of the inner support cylinder 5 is provided with a plurality of partition grooves 15. The outer wall of one end of the clamping cylinder 4 is in fit connection with the inner wall of the ductile iron pipe 1. One end of the clamping cylinder 4 is provided with an inwardly recessed conical surface. Threaded surfaces 6 are provided on the outer wall of the inner support cylinder 5 and the inner wall of the clamping cylinder 4. The inner support cylinder 5 is threadedly connected to the end of the clamping cylinder 4 away from the conical surface through the threaded surface 6. Insert the clamping cylinders 4 at both ends of the corrugated pipe 3 into the interior of one end of the ductile iron pipe 1 respectively. Turn the inner support cylinder 5 to move towards the inside of the clamping cylinder 4, and drive the two ductile iron pipes 1 to approach each other. The inner support cylinder 5 pushes one end of the clamping cylinder 4 to move outward, so as to tension the outer wall of the clamping cylinder 4 and the inner wall of the ductile iron pipe 1, making the ductile iron pipe 1 connected to the inner support cylinder 5. At this time, the two ductile iron pipes 1 are interconnected through the corrugated pipe 3. When disassembly is required, reverse-rotate the inner support cylinder 5 to move it outward so that it no longer squeezes one end of the clamping cylinder 4.

[0020] A retaining ring is provided at one end of the clamping cylinder 4 away from the partition grooves 15. A stepped groove is provided inside one end of the ductile iron pipe 1. The outer wall of the retaining ring is in snap-fit connection with the inner wall of the stepped groove. The clamping cylinder 4 is clamped inside one end of the ductile iron pipe 1 through the cooperation of the retaining ring and the stepped groove, so as to install the clamping cylinder 4 inside the ductile iron pipe 1.

[0021] Both ends of the threaded rod 7 penetrate through the inner wall of the adjacent assembly disc 2 and are threadedly connected with nuts 8. Sealing bearings 11 are symmetrically arranged at both ends of the corrugated pipe 3. The corrugated pipe 3 is rotationally connected with the inner support cylinder 5 through the sealing bearings 11. One end of the threaded rod 7 penetrates through the connection hole inside one assembly disc 2 and then through the connection hole of the other assembly disc 2, and nuts 8 are tightened at both ends of the threaded rod 7 to completely lock the positions of the two ductile iron pipes 1, making the connection between the two ductile iron pipes 1 closer. When disassembling, only need to unscrew the nuts 8 and pull out the threaded rod 7 from the inside of the assembly disc 2.

[0022] A connection seat 9 is fixedly connected to the outside of the sealing bearing 11. Rotating shafts are symmetrically and fixedly connected to the top and bottom of the connection seat 9. A rotating rod 10 is arranged between the front and rear parallel connection seats 9. Both ends of the rotating rod 10 are hinged to the two connection seats 9 through the rotating shafts respectively. The corrugated pipe 3 is a tubular elastic sensitive element formed by connecting foldable corrugated sheets along the folding and telescoping direction. The connection seat 9 can rotate following the movement of the corrugated pipe 3, restricting the movement of the corrugated pipe 3 within a certain range and playing a supporting role for it. The corrugated pipe 3 has good elasticity and flexibility, and can effectively absorb vibration and impact force, reducing equipment noise.

[0023] An annular groove 12 is arranged on the outside of the inner support cylinder 5. A plurality of balls 13 are arranged inside the annular groove 12. A sealing ring 14 is arranged inside the sealing bearing 11. The annular groove 12 is hinged to the sealing ring 14 through the balls 13. The sealing ring 14 can fill the gap between the inner support cylinder 5 and the sealing bearing 11, making the sealing performance between the inner support cylinder 5 and the sealing bearing 11 better. The inner support cylinder 5 can rotate around the center of the sealing bearing 11. The balls 13 are arranged inside the annular groove 12. When the inner support cylinder 5 rotates, the balls 13 can roll in the annular groove 12, reducing the friction force between the inner support cylinder 5 and the sealing ring 14, making the rotation of the inner support cylinder 5 inside the sealing bearing 11 smoother.

[0024] For the anti-disconnection interface structure of the ductile iron pipe, the clamping cylinders 4 at both ends of the corrugated pipe 3 are respectively inserted into the inside of one end of the ductile iron pipe 1. The inner support cylinder 5 is rotated to move towards the inside of the clamping cylinder 4, and drives the two ductile iron pipes 1 to approach each other. The inner support cylinder 5 pushes one end of the clamping cylinder 4 to move outwards, so as to tension the outer wall of the clamping cylinder 4 and the inner wall of the ductile iron pipe 1, making the ductile iron pipe 1 and the inner support cylinder 5 connected together. At this time, the two ductile iron pipes 1 are interconnected through the corrugated pipe 3. One end of the threaded rod 7 penetrates through the connection hole inside one assembly disc 2 and then through the connection hole of the other assembly disc 2, and nuts 8 are tightened at both ends of the threaded rod 7 to completely lock the positions of the two ductile iron pipes 1, making the connection between the two ductile iron pipes 1 closer.

[0025] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An anti - detachment joint structure for a ductile iron pipe, comprising a ductile iron pipe (1), an assembly disc (2) and a corrugated pipe (3), characterized in that: One end of the ductile iron pipe (1) is provided with an assembly disc (2), a plurality of threaded rods (7) are arranged between adjacent assembly discs (2), a corrugated pipe (3) is arranged between adjacent ductile iron pipes (1), and a connecting mechanism is arranged between the corrugated pipe (3) and the ductile iron pipe (1); The connecting mechanism includes a clamping cylinder (4), an inner support cylinder (5) and a threaded surface (6). Clamping cylinders (4) are symmetrically arranged at both ends of the corrugated pipe (3). An inner support cylinder (5) is arranged inside the clamping cylinder (4). A plurality of separation grooves (15) are arranged at one end of the inner support cylinder (5). The outer wall of one end of the clamping cylinder (4) is in fit connection with the inner wall of the ductile iron pipe (1).

2. The anti - detachment interface structure of a ductile iron pipe according to claim 1, characterized in that: One end of the clamping cylinder (4) is provided with an inwardly concave conical surface. Threaded surfaces (6) are arranged on the outer wall of the inner support cylinder (5) and the inner wall of the clamping cylinder (4). The inner support cylinder (5) is threadedly connected to the end of the clamping cylinder (4) away from the conical surface through the threaded surface (6).

3. The anti - detachment joint structure of a ductile iron pipe according to claim 1, characterized in that: A retaining ring is arranged at the end of the clamping cylinder (4) away from the separation groove (15). A stepped groove is arranged inside one end of the ductile iron pipe (1). The outer wall of the retaining ring is in snap connection with the inner wall of the stepped groove.

4. The anti - detachment interface structure of a ductile iron pipe according to claim 1, characterized in that: Both ends of the threaded rod (7) penetrate through the inside of adjacent assembly discs (2) and are threadedly connected with nuts (8). Sealed bearings (11) are symmetrically arranged at both ends of the corrugated pipe (3). The corrugated pipe (3) is rotationally connected to the inner support cylinder (5) through the sealed bearings (11).

5. The anti - detachment interface structure of a ductile iron pipe according to claim 4, characterized in that: A connecting seat (9) is fixedly connected to the outside of the sealed bearing (11). Rotating shafts are symmetrically and fixedly connected to the top and bottom of the connecting seat (9). A rotating rod (10) is arranged between the front and rear parallel connecting seats (9). Both ends of the rotating rod (10) are hinged to the two connecting seats (9) through the rotating shafts respectively.

6. The anti - detachment interface structure of a ductile iron pipe according to claim 4, characterized in that: An annular groove (12) is arranged on the outside of the inner support cylinder (5). A plurality of balls (13) are arranged inside the annular groove (12). A sealing ring (14) is arranged inside the sealed bearing (11). The annular groove (12) is hinged to the sealing ring (14) through the balls (13).

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