Nodular cast iron socket and spigot joint

Abstract

The utility model discloses a nodular cast iron bell and spigot joint, which belongs to the field of pipeline connection and comprises a pipe fitting and a connecting pipe, and the front end and the rear end of the pipe fitting are provided with birdmouths used for being connected and locked with the connecting pipe; the front end and the rear end of the connecting pipe are provided with socket heads used for being connected and locked with pipe fittings. The outer wall of the outermost side of the socket head is fixedly provided with an elastic sealing rubber ring which is used for relieving radial pressure after connection so as to prevent the outermost side of the connecting pipe from jacking the side wall. A plurality of retaining teeth for increasing the friction force after the socket and the socket are inserted are fixedly mounted on the outer side wall of the socket; and locking structures for locking positions are mounted on the socket head and the birdmouth. By means of the mode, the problem that the pipe fitting is prone to slipping off due to the fact that the retaining teeth are too small is solved, and meanwhile the sealing performance of the device is improved by attaching the rubber ring to the inner side of the locking structure.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection, specifically to a ductile iron socket joint. Background Technology

[0002] Socket joints have significant application value in the field of pipeline connection. Currently, socket joints are widely used in heating, water supply, drainage and other fields. With the gradual expansion of the application scope and the improvement of technology, the casting process, sealing performance, shear resistance and tensile strength of socket joints are also improving.

[0003] Chinese patent CN215568763U discloses a connection structure for a rigid-flexible interference fit socket self-sealing pipe, including a flexible pipe fitting and a rigid connecting pipe. The connecting pipe has sockets at both ends, and the pipe fitting has a socket on its inner side at one or both ends. The outer diameter of the socket and the inner diameter of the socket are interference-fitted. The pipe fitting and the connecting pipe are connected by inserting the socket into the socket. This invention uses an interference fit self-sealing, eliminating the risk of installation leakage. Anti-reverse teeth are provided on the socket to improve the tensile strength after the pipe fitting and connecting pipe are connected. A baffle is provided in the middle of the connecting pipe to ensure proper fit between the socket and the socket. The baffle directly presses against the end of the pipe fitting, facilitating pipe jacking construction. This solves the problem of easy bursting of rigid material joints during jacking and correction, and the problem of poor stress distribution at the socket of flexible pipes. It also solves the problem of corrosion protection on the inner wall of the connecting pipe. However, this technology still has the following problems:

[0004] 1. This device connects the rigid pipe connector plug with the flexible pipe fitting through an interference fit between the anti-reverse teeth and the inner wall of the connector. It relies solely on the anti-reverse teeth to increase friction and prevent the pipe fitting from slipping. When the anti-reverse teeth are too large, the pipe fitting and the connector are difficult to close. When the anti-reverse teeth are too small, the pipe fitting and the connector are prone to slipping and the airtightness is difficult to guarantee.

[0005] 2. After prolonged use, the plasticity of the pipe increases and its elasticity decreases, which makes the end of the connector prone to cracking the inner wall of the pipe when the pipe is subjected to radial vibration.

[0006] Based on this, the present invention designs a ductile iron socket joint to solve the above problems. Utility Model Content

[0007] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a ductile iron socket joint.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A ductile iron socket joint includes a pipe fitting and a connecting pipe, and also includes an elastic sealing ring, a locking structure and anti-reverse teeth;

[0010] The pipe fitting has sockets at both ends for connecting and locking with the connecting pipe.

[0011] The connecting pipe is provided with socket plugs at both ends for connecting and locking with the pipe fittings.

[0012] The outermost outer wall of the connector is fixedly equipped with an elastic sealing ring to reduce radial pressure after connection and thus prevent the outermost sidewall of the connector from cracking.

[0013] Multiple anti-retraction teeth are fixedly installed on the outer wall of the socket to increase the friction between the socket and the plug after they are inserted.

[0014] Both the plug and the connector are equipped with locking structures for locking the position.

[0015] The locking structure includes a first engagement component, a second engagement component, and a sealing ring. The first engagement component and the second engagement component cooperate to lock the pipe fitting and the connecting pipe. The first engagement component is connected to the socket plug, the second engagement component is connected to the socket interface, the first engagement component is connected to the second engagement component, and both the first engagement component and the second engagement component are connected to the sealing ring.

[0016] Furthermore, the first biting component includes a rotating ring, a biting block, and a clamping block. The rotating ring is rotatably connected to the connecting pipe. Multiple biting blocks are arranged in a circumferential array and fixedly installed at the end of the rotating ring away from the connecting pipe. One side wall of the biting block is fixedly connected to the clamping block. The end of the clamping block away from the connecting pipe abuts against the sealing ring.

[0017] Furthermore, the second engagement component includes an engagement block and a clamping block. Multiple engagement blocks are arranged in a circumferential array and fixedly installed at the end of the receiving interface away from the pipe fitting. A clamping block is fixedly installed on the side wall of the engagement block. The side wall of the clamping block away from the pipe fitting is fixedly connected to the sealing ring.

[0018] Furthermore, the sealing ring is made of pure butyl tape.

[0019] Furthermore, the elastic sealing ring is made of rubber.

[0020] Furthermore, the upper end of the first engagement block is provided with a screw hole, and the outer side wall of the second abutment block is provided with a screw hole.

[0021] Furthermore, the elastic sealing ring has a width greater than 5 cm and a thickness greater than 1 cm.

[0022] Furthermore, the anti-reverse teeth are provided in at least three rows.

[0023] Furthermore, the height of the anti-reverse tooth is greater than 0.5 cm and less than 1 cm.

[0024] Furthermore, the thickness of the sealing ring is greater than 1 cm.

[0025] Compared with the prior art, the advantages of this utility model are as follows: 1. By adding a locking structure, the problem of easy slippage of pipe fittings due to the small anti-reverse teeth is avoided. At the same time, a rubber ring is attached to the inner side of the locking structure to increase the sealing performance of the device.

[0026] 2. By adding rubber to wrap the end of the connector, the inner wall of the pipe fitting is prevented from being cracked by the end of the connector due to radial vibration. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This utility model provides a three-dimensional ductile iron socket joint. Figure 1 ;

[0029] Figure 2 This is a front view of a ductile iron socket joint according to the present invention;

[0030] Figure 3 This is a left view of a ductile iron socket joint according to the present invention;

[0031] Figure 4 This is a partial perspective view of a ductile iron socket joint according to the present invention;

[0032] Figure 5 For along Figure 2 A partial 3D view of the pipe fitting after a portion has been cut away along the AA direction;

[0033] Figure 6 For along Figure 2 A three-dimensional view of the connecting pipe after a portion has been cut away along the AA direction.

[0034] The labels in the diagram represent:

[0035] 1. Pipe fittings; 2. Connecting pipes; 3. Socket plugs; 4. Socket interfaces; 5. Elastic sealing rings; 6. Locking structures; 61. Engaging assembly one; 611. Rotating ring; 612. Engaging block one; 613. Clamping block one; 614. Screw hole one; 62. Engaging assembly two; 621. Engaging block two; 622. Clamping block two; 623. Screw hole two; 63. Sealing ring; 7. Anti-reverse teeth. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0037] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0038] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-6 A ductile iron socket joint, comprising a fitting 1 and a connecting pipe 2;

[0039] Both ends of the pipe fitting 1 are provided with a socket 4 for connecting and locking with the connecting pipe 2;

[0040] The connecting pipe 2 has socket plugs 3 at both ends for connecting and locking with the pipe fitting 1;

[0041] The outermost outer wall of the connector 3 is fixedly equipped with an elastic sealing ring 5 to reduce radial pressure after connection and thus prevent the outermost sidewall of the connecting pipe 2 from cracking.

[0042] Multiple anti-retraction teeth 7 are fixedly installed on the outer wall of the socket 3 to increase the friction between the socket 4 and the socket 3 after they are inserted.

[0043] Both the connector 3 and the connector 4 are equipped with locking structures 6 for locking the position.

[0044] The locking structure 6 includes a first engagement component 61, a second engagement component 62, and a sealing ring 63. The first engagement component 61 and the second engagement component 62 cooperate to lock the pipe fitting 1 and the connecting pipe 2. The first engagement component 61 is connected to the socket 3, the second engagement component 62 is connected to the socket 4, the first engagement component 61 and the second engagement component 62 are connected, and both the first engagement component 61 and the second engagement component 62 are connected to the sealing ring 63.

[0045] In this utility model, the operator first pushes the socket 3 on the connecting pipe 2 to the socket 4 on the fitting 1. At this time, the anti-reverse tooth 7 increases the friction between the fitting 1 and the connecting pipe 2 and generates a certain degree of sealing. The elastic sealing ring 5 prevents the outermost sidewall of the fitting 1 from cracking after the connecting pipe 2 is subjected to radial pressure. Then, the first biting component 61 is rotated so that the first biting component 61 and the second biting component 62 are engaged and locked in position. At the same time, the sealing ring 63 blocks the biting gap, realizing the tight connection and sealing between the fitting 1 and the connecting pipe 2.

[0046] The engagement assembly 61 includes a rotating ring 611, an engagement block 612, and a clamping block 613. The rotating ring 611 is rotatably connected to the connecting pipe 2. Multiple engagement blocks 612 are arranged in a circumferential array and fixedly installed at the end of the rotating ring 611 away from the connecting pipe 2. The side wall of the engagement block 612 is fixedly connected to the clamping block 613. A screw hole 614 is opened at the upper end of the engagement block 612. The end of the clamping block 613 away from the connecting pipe 2 abuts against the sealing ring 63.

[0047] The second engagement component 62 includes an engagement block 621 and a clamping block 622. Multiple engagement blocks 621 are arranged in a circumferential array and fixedly installed at the end of the receiving interface 4 away from the pipe fitting 1. A clamping block 622 is fixedly installed on the side wall of the engagement block 621. A screw hole 623 is opened on the outer side wall of the clamping block 622. The side wall of the clamping block 622 away from the pipe fitting 1 is fixedly connected to the sealing ring 63.

[0048] In this utility model, the operator first pushes the socket 3 on the connecting pipe 2 to the socket 4 on the fitting 1. At this time, the first biting block 612 and the second biting block 621 are placed alternately. Then, the rotating ring 611 is rotated so that the first pressing block 613 and the second pressing block 622 press against and squeeze the sealing ring 63 under the biting of the second biting block 621 and the first biting block 612. Then, the screw hole 614 and the screw hole 623 are aligned and the screw is unscrewed to fix the position. The fixing of the fitting 1 and the connecting pipe 2 is completed.

[0049] The elastic sealing ring 5 has a width greater than 5 cm and a thickness greater than 1 cm to avoid the elastic sealing ring 5 being too narrow or too thin, which would prevent it from failing to provide cushioning and sealing.

[0050] The anti-reverse teeth 7 are provided with at least three rows to ensure that the anti-reverse teeth 7 increase the friction force.

[0051] The height of the anti-reverse tooth 7 is greater than 0.5 cm and less than 1 cm, so as to avoid the effect of weak friction due to the anti-reverse tooth 7 being too small, or the anti-reverse tooth 7 being too large, making it difficult to insert the plug 3 and the socket 4.

[0052] The thickness of the sealing ring 63 is greater than 1 cm, ensuring that the sealing ring 63 has sufficient deformation to maintain the sealing effect of the pipe after the locking structure 6 is locked.

[0053] Example 2: In some embodiments, as a preferred embodiment of this utility model,

[0054] Preferably, the sealing ring 63 is made of pure butyl tape, which achieves the best sealing effect.

[0055] Example 3: In some embodiments, as a preferred embodiment of this utility model,

[0056] Preferably, the elastic sealing ring 5 is made of rubber, which ensures that the inner wall of the pipe fitting 1 is not cracked under radial force while also providing a sealing effect.

[0057] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A ductile iron socket joint, comprising a fitting (1) and a connecting pipe (2), characterized in that: It also includes an elastic sealing ring (5), a locking structure (6), and anti-reverse teeth (7); The pipe fitting (1) has sockets (4) at both ends for connecting and locking with the connecting pipe (2). The connecting pipe (2) has socket plugs (3) at both ends for connecting and locking with the fitting (1); The outermost outer wall of the connector (3) is fixedly equipped with an elastic sealing ring (5) to reduce radial pressure after connection and thus prevent the outermost sidewall of the connecting pipe (2) from cracking. Multiple anti-retraction teeth (7) are fixedly installed on the outer wall of the socket (3) to increase the friction between the socket (4) and the socket (3) after insertion. Both the plug (3) and the socket (4) are equipped with locking structures (6) for locking the position. The locking structure (6) includes a first engagement component (61), a second engagement component (62), and a sealing ring (63). The first engagement component (61) and the second engagement component (62) work together to lock the fitting (1) and the connecting pipe (2). The first engagement component (61) is connected to the socket (3), the second engagement component (62) is connected to the socket (4), the first engagement component (61) and the second engagement component (62) are connected, and both the first engagement component (61) and the second engagement component (62) are connected to the sealing ring (63).

2. The ductile iron socket joint according to claim 1, characterized in that, The first biting component (61) includes a rotating ring (611), a biting block (612) and a clamping block (613). The rotating ring (611) is rotatably connected to the connecting pipe (2). Multiple biting blocks (612) are arranged in a circumferential array and fixedly installed at the end of the rotating ring (611) away from the connecting pipe (2). The side wall of the biting block (612) is fixedly connected to the clamping block (613). The end of the clamping block (613) away from the connecting pipe (2) abuts against the sealing ring (63).

3. The ductile iron socket joint according to claim 2, characterized in that, The second engagement component (62) includes a second engagement block (621) and a second abutment block (622). Multiple second engagement blocks (621) are arranged in a circumferential array and fixedly installed at the end of the connector (4) away from the pipe fitting (1). The side wall of the second engagement block (621) is fixedly installed with a second abutment block (622). The side wall of the second abutment block (622) away from the pipe fitting (1) is fixedly connected to the sealing ring (63).

4. The ductile iron socket joint according to claim 1, characterized in that, The sealing ring (63) is made of pure butyl tape.

5. The ductile iron socket joint according to claim 1, characterized in that, The elastic sealing ring (5) is made of rubber.

6. The ductile iron socket joint according to claim 3, characterized in that, The upper end of the first biting block (612) is provided with a screw hole (614), and the outer side wall of the second abutting block (622) is provided with a screw hole (623).

7. The ductile iron socket joint according to claim 1, characterized in that, The elastic sealing ring (5) has a width greater than 5 cm and a thickness greater than 1 cm.

8. The ductile iron socket joint according to claim 1, characterized in that, The anti-reverse teeth (7) have at least three rows.

9. The ductile iron socket joint according to claim 1, characterized in that, The height of the anti-reverse tooth (7) is greater than 0.5 cm and less than 1 cm.

10. The ductile iron socket joint according to claim 1, characterized in that, The thickness of the sealing ring (63) is greater than 1 cm.

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