Concentric butt joint equipment for nodular cast iron pipes

Abstract

The utility model discloses a concentric butt joint equipment of nodular cast iron pipe, including bellmouth pipe, slot, insert pipe and seal rubber ring, the insert pipe is provided at the one side of bellmouth pipe, and the one end of bellmouth pipe close to insert pipe is provided with connecting end, the inside of connecting end is provided with slot, and the insert pipe is provided with the seal rubber ring. The end, close to the socket pipe, of the inserting pipe is inserted into the inserting groove, a sealing rubber ring is arranged on the inner side wall of the inserting groove, and the side, close to the inserting pipe, of the sealing rubber ring is in pressing fit with the inserting pipe. The socket pipe, the inserting pipe, the inserting groove, the connecting end and the sealing rubber ring are installed, the sealing performance of a connector is kept through the self-sealing effect of the sealing rubber ring, and therefore the two nodular cast iron pipe bodies are in butt joint, and the structure allows a certain deflection angle to adapt to foundation settlement and long-distance steering installation of pipelines. The sealing rubber ring is composed of first hard rubber, second hard rubber and soft rubber and has certain supporting and centering effects.

Description

Technical Field

[0001] The utility model relates to the technical field of ductile iron pipe butt jointing, in particular to a concentric butt jointing device for ductile iron pipes. Background Art

[0002] Ductile iron pipes are made by high-speed centrifugal casting of molten iron using a centrifugal ductile iron casting machine after adding a spheroidizing agent. They have excellent performance and are widely used in many fields. The docking of ductile iron pipes is a key link in the pipeline installation process, which directly affects the sealing, firmness and safety of the pipeline system.

[0003] The docking equipment for ductile iron pipes generally refers to an interface device, including a socket pipe and an insert pipe. The socket pipe and the insert pipe are respectively connected to two ductile iron pipes. The two sets of ductile iron pipes are docked by inserting the insert pipe into the socket pipe. This structure is generally connected by using flanges and bolts. Although the sealing performance is good, during the installation process of ductile iron pipes, due to terrain, design or construction requirements, a certain degree of deflection connection is often required between the pipes, affecting the normal docking. Utility Model Content

[0004] The purpose of the utility model is to provide a concentric butt joint device for ductile iron pipes to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a concentric docking device for ductile iron pipes, comprising a socket pipe, a slot, an insertion pipe and a sealing rubber ring, an insertion pipe is provided on one side of the socket pipe, and a connecting end is provided at the end of the socket pipe close to the insertion pipe, a slot is provided inside the connecting end, the end of the insertion pipe close to the socket pipe is inserted into the interior of the slot, and a sealing rubber ring is provided on the inner wall of the slot, the side of the sealing rubber ring close to the insertion pipe is pressed tightly against the insertion pipe, and the sealing rubber ring is composed of a first hard rubber, a second hard rubber and a soft rubber, the two ends of the sealing rubber ring away from the insertion pipe are respectively provided with a first hard rubber and a second hard rubber, and a soft rubber is provided on the side of the first hard rubber and the second hard rubber close to the insertion pipe.

[0006] Preferably, the inner side wall of the socket pipe is provided with a reinforcement layer, and reinforcement ribs are evenly provided inside the reinforcement layer.

[0007] Preferably, a wear-resistant layer is provided on the outer side of the socket pipe, and the wear-resistant layer is a ceramic lining.

[0008] Preferably, two groups of outer rings are provided on the outside of the connecting end, and a buffer ring is provided on the side of the outer ring close to the connecting end, and the buffer ring is made of silicone material.

[0009] Preferably, a limiting protrusion is provided at a central position inside the slot, and a limiting groove matching the limiting protrusion is preset on the sealing rubber ring.

[0010] Preferably, fixing pieces are evenly arranged on the outside of the outer ring, and external supporting ribs pass through the fixing pieces transversely.

[0011] Preferably, four groups of external support ribs are provided on the outer ring, and the external support ribs are all made of stainless steel.

[0012] Preferably, the soft rubber is made of styrene-butadiene rubber, and a first reinforcing rib and a second reinforcing rib are respectively embedded at both ends of the inside of the soft rubber.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the concentric docking device of the ductile iron pipe is installed with a socket pipe, an insert pipe, a slot, a connecting end and a sealing rubber ring. The socket pipe and the insert pipe are respectively integrally formed with two groups of ductile iron pipe bodies. The insert pipe is inserted into the connecting end at one end of the socket pipe. The outer wall of the insert pipe squeezes the sealing rubber ring placed in the connecting end, causing it to be compressed and deformed to generate a certain contact pressure. The self-sealing effect of the sealing rubber ring is used to maintain the sealing of the interface, thereby concentrically docking the two groups of ductile iron pipe bodies. Due to the elasticity of the sealing rubber ring, the sealing effect can still be maintained when the pipeline is deflected. The structure allows a certain deflection angle to adapt to foundation settlement and long-distance steering installation of the pipeline. By controlling the installation depth of the slot in the connecting end, the joint can have a certain axial expansion and contraction amount, thereby adapting to different installation conditions. In addition, the sealing rubber ring is composed of a first hard rubber, a second hard rubber and a soft rubber. The first hard rubber and the second hard rubber are connected to the inner wall of the slot, and have a certain support and centering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of the front cross-sectional structure of the present utility model;

[0016] Figure 2 For the utility model Figure 1 A in the middle is an enlarged structural diagram;

[0017] Figure 3 This is a schematic diagram of the appearance structure of the utility model;

[0018] Figure 4This is a side view structural diagram of the outer ring of the utility model;

[0019] Figure 5 This is a schematic diagram of the side wall structure of the socket pipe of the present invention.

[0020] In the figure: 1. socket pipe; 2. connecting end; 3. slot; 4. insertion tube; 5. sealing rubber ring; 6. first hard rubber; 7. second hard rubber; 8. first reinforcing rib; 9. second reinforcing rib; 10. limiting bump; 11. outer ring; 12. external supporting rib; 13. fixing part; 14. buffer ring; 15. reinforcement layer; 16. reinforcement rib; 17. wear-resistant layer; 18. soft rubber. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-5 The utility model provides an embodiment: a concentric butt joint device for ductile iron pipes, comprising a socket pipe 1, a slot 3, an insert pipe 4 and a sealing rubber ring 5. The insert pipe 4 is provided on one side of the socket pipe 1, and the socket pipe 1 and the insert pipe 4 are respectively integrally formed with two groups of ductile iron pipe bodies;

[0023] The end of the socket pipe 1 close to the insertion pipe 4 is provided with a connection end 2, the interior of the connection end 2 is provided with a slot 3, and the end of the insertion pipe 4 close to the socket pipe 1 is inserted into the interior of the slot 3;

[0024] A sealing rubber ring 5 is provided on the inner side wall of the slot 3, and the side of the sealing rubber ring 5 close to the insertion tube 4 is pressed tightly against the insertion tube 4;

[0025] Insert the insert tube 4 into the slot 3. The outer wall of the insert tube 4 presses the sealing rubber ring 5 placed in the slot 3, causing it to be compressed and deformed to generate a certain contact pressure. The self-sealing effect of the sealing rubber ring 5 is used to maintain the sealing of the interface, thereby concentrically connecting the two sets of ductile iron pipe bodies.

[0026] Due to the elasticity of the sealing rubber ring 5, the sealing effect can be maintained even when the pipeline is deflected. This structure allows a certain deflection angle to adapt to foundation settlement and long-distance pipeline steering installation. By controlling the installation depth of the slot 3 in the connecting end 2, the joint can have a certain axial expansion and contraction amount, thereby adapting to different installation conditions.

[0027] The sealing rubber ring 5 is composed of a first hard rubber 6, a second hard rubber 7 and a soft rubber 18. The first hard rubber 6 and the second hard rubber 7 are respectively provided at both ends of the sealing rubber ring 5 away from the insertion tube 4.

[0028] The first hard rubber 6 and the second hard rubber 7 are connected to the inner wall of the slot 3, which has a certain supporting and centering effect, and a soft rubber 18 is provided on the side of the first hard rubber 6 and the second hard rubber 7 close to the insertion tube 4;

[0029] The soft rubber 18 is made of styrene-butadiene rubber, and a first reinforcing rib 8 and a second reinforcing rib 9 are embedded at both ends of the soft rubber 18 to ensure elasticity while improving the structural strength of the soft rubber 18;

[0030] A limiting protrusion 10 is provided at the central position inside the slot 3, and a limiting groove matching the limiting protrusion 10 is preset on the sealing rubber ring 5, which plays a certain limiting role on the sealing rubber ring 5 and prevents it from deviating and shifting;

[0031] Two sets of outer rings 11 are provided on the outside of the connection end 2, and a buffer ring 14 is provided on the side of the outer ring 11 close to the connection end 2. The buffer ring 14 is made of silicone material. Fixing members 13 are evenly provided on the outside of the outer ring 11, and external support ribs 12 are horizontally passed through the fixing members 13.

[0032] There are four sets of external support ribs 12 on the outer ring 11, and the external support ribs 12 are made of stainless steel, which can protect and support the connecting end 2 and are not easily deformed or damaged when squeezed by external force;

[0033] The inner wall of the socket pipe 1 is provided with a reinforcement layer 15, and the interior of the reinforcement layer 15 is evenly provided with reinforcement ribs 16 to improve the structural strength of the socket pipe 1;

[0034] The outer side of the bell pipe 1 is provided with a wear-resistant layer 17, and the wear-resistant layer 17 is a ceramic lining, which improves the wear resistance of the bell pipe 1 and extends its service life.

[0035] Working principle: When the embodiment of the present application is in use, the socket pipe 1 and the insertion pipe 4 are respectively integrally formed with the two groups of ductile iron pipe bodies. A connecting end 2 is provided at one end of the socket pipe 1, and a slot 3 is provided in the connecting end 2. The insertion pipe 4 is inserted into the slot 3. The outer wall of the insertion pipe 4 squeezes the sealing rubber ring 5 placed in the slot 3, causing it to be compressed and deformed to generate a certain contact pressure. The self-sealing effect of the sealing rubber ring 5 is used to maintain the sealing of the interface, thereby connecting the two groups of ductile iron pipe bodies. Due to the elasticity of the sealing rubber ring 5, the sealing effect can still be maintained when the pipeline is deflected. This structure allows a certain deflection angle to adapt to the basic In order to cope with foundation settlement and long-distance steering installation of pipelines, the joint can have a certain axial expansion and contraction by controlling the installation depth of the slot 3 in the connecting end 2, so as to adapt to different installation conditions. In addition, the sealing rubber ring 5 is composed of a first hard rubber 6, a second hard rubber 7 and a soft rubber 18. The first hard rubber 6 and the second hard rubber 7 are connected to the inner wall of the slot 3, which has a certain supporting and centering effect. Two groups of outer rings 11 are provided on the outside of the connecting end 2, and fixings 13 are provided around the outer ring 11. External support ribs 12 pass through the fixings 13, which can protect and support the connecting end 2 and are not easily deformed or damaged when squeezed by external force.

[0036] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0038] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0039] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A concentric butt joint device for ductile iron pipes, characterized in that: The invention comprises a socket pipe (1), a slot (3), an insertion pipe (4) and a sealing rubber ring (5), wherein the insertion pipe (4) is provided on one side of the socket pipe (1), and the end of the socket pipe (1) close to the insertion pipe (4) is provided with a connecting end (2), the interior of the connecting end (2) is provided with a slot (3), the end of the insertion pipe (4) close to the socket pipe (1) is inserted into the interior of the slot (3), and the inner wall of the slot (3) is provided with a sealing rubber ring (5), the side of the sealing rubber ring (5) close to the insertion pipe (4) is pressed tightly against the insertion pipe (4), and the sealing rubber ring (5) is composed of a first hard rubber (6), a second hard rubber (7) and a soft rubber (18), the two ends of the sealing rubber ring (5) away from the insertion pipe (4) are respectively provided with a first hard rubber (6) and a second hard rubber (7), and the side of the first hard rubber (6) and the second hard rubber (7) close to the insertion pipe (4) is provided with a soft rubber (18).

2. The concentric butt joint device for ductile iron pipes according to claim 1, characterized in that: The inner side wall of the socket pipe (1) is provided with a reinforcement layer (15), and reinforcement ribs (16) are evenly provided inside the reinforcement layer (15).

3. The concentric butt joint device for ductile iron pipes according to claim 1, characterized in that: The outer side of the socket pipe (1) is provided with a wear-resistant layer (17), and the wear-resistant layer (17) is a ceramic lining.

4. The concentric butt joint device for ductile iron pipes according to claim 1, characterized in that: Two groups of outer rings (11) are provided on the outside of the connecting end (2), and a buffer ring (14) is provided on one side of the outer ring (11) close to the connecting end (2), and the buffer ring (14) is made of silicone material.

5. The concentric butt joint device for ductile iron pipes according to claim 1, characterized in that: A limiting protrusion (10) is provided at a central position inside the slot (3), and a limiting groove matching the limiting protrusion (10) is preset on the sealing rubber ring (5).

6. The concentric butt joint device for ductile iron pipes according to claim 4, characterized in that: The outer side of the outer ring (11) is evenly provided with fixing members (13), and external supporting ribs (12) are passed through the fixing members (13) transversely.

7. The concentric butt joint device for ductile iron pipes according to claim 6, characterized in that: Four groups of external support ribs (12) are provided on the outer ring (11), and the external support ribs (12) are all made of stainless steel.

8. The concentric butt joint device for ductile iron pipes according to claim 1, characterized in that: The soft rubber (18) is made of styrene-butadiene rubber, and a first reinforcing rib (8) and a second reinforcing rib (9) are respectively embedded at two ends inside the soft rubber (18).

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