A cast iron pipeline rapid butt joint auxiliary device for municipal engineering

Abstract

This utility model discloses an auxiliary device for quick docking of cast iron pipes in municipal engineering, involving flange components. It includes a cast iron pipe (end A) and a cast iron pipe (end B) to be docked, comprising a first clamp on end A and a second clamp on end B. The first clamp includes a threaded portion that is threadedly connected to the internal thread of a threaded sleeve slidably disposed on the second clamp. The threaded portion consists of two side lobes, and a first sealing strip is provided at their joint surface. The outer diameter of the threaded portion is 0.25mm-0.55mm larger than the inner diameter of the threaded sleeve. This utility model has a simple structure, is convenient and quick to operate, and can quickly achieve pipe docking, while also eliminating the problems associated with deep burial welding.

Description

Technical Field

[0001] This utility model relates to flange components, specifically an auxiliary device for quick connection of cast iron pipes in municipal engineering. Background Technology

[0002] Water supply pipes are generally made of cast iron. The purpose of using cast iron pipes is that they have high pressure resistance and are relatively convenient for subsequent maintenance, cutting and construction.

[0003] The joining of cast iron pipes generally employs a method similar to the auxiliary installation tool for ductile iron pipe fittings disclosed in a Chinese authorized patent, publication number CN215588979U, publication date 2022-01-21. However, this tool aims to make the two pipe sections coaxial to facilitate subsequent welding operations. Because the pipes are buried deep underground, although the weld is strong, the welded area is prone to corrosion, potentially leading to a secondary breakage. Utility Model Content

[0004] The purpose of this invention is to provide an auxiliary device for quick connection of cast iron pipes in municipal engineering, so as to solve the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a quick-connection auxiliary device for cast iron pipes in municipal engineering, comprising a cast iron pipe A end to be connected and a cast iron pipe B end, including a first clamping member clamped on the cast iron pipe A end and a second clamping member clamped on the cast iron pipe B end, wherein: The first clamping member includes a threaded portion, which is threadedly connected to the internal thread of a threaded sleeve that is slidably disposed on the second clamping member; The threaded part is composed of two side lobes, and a first sealing strip is provided on the splicing surface of the two lobes; The outer diameter of the threaded portion is 0.25mm-0.55mm larger than the inner diameter of the threaded sleeve.

[0006] Preferably, the first clamp is composed of a first left side part and a first right side part, and a second sealing strip is fixedly provided on the adjacent surfaces of the two parts; Both the first left side and the first right side are provided with a first mounting part, and also include bolts, which pass through the first mounting parts on the first left side and the first right side and are fixed by nuts.

[0007] Preferably, the second clamp is composed of a second left side part and a second right side part, and a third sealing strip is fixedly provided on the adjacent surfaces of the two parts; A second mounting portion is provided on both the first left side portion and the first right side portion, and a bolt is also provided, which passes through the second mounting portion on the second left side portion and the second right side portion and is fixed by a nut.

[0008] Preferably, the end of the threaded sleeve is provided with a fourth sealing strip that deforms in contact with the sidewalls of the second left and second right portions.

[0009] Preferably, the second left side and the second right side are provided with sliding grooves, and the threaded sleeve is fixedly provided with a convex ring at one end opposite to the fourth sealing strip, and the convex ring is inserted into the sliding groove.

[0010] Preferably, a fifth sealing strip is fixedly installed on the side wall of the convex ring portion facing the fourth sealing strip.

[0011] Preferably, the second clamp has an internal thread groove at one end relative to the threaded sleeve, and the second clamp is a negative pressure part that serves as part of the sidewall of the internal thread groove. It also includes an external threaded ring that is threaded to the internal thread groove to reduce the circumference of the negative pressure section to a predetermined value.

[0012] Preferably, the first clamp and the second clamp are provided with a mesh rubber pad on the side wall that contacts the cast iron pipe. In the above technical solution, the auxiliary device for quick docking of cast iron pipes for municipal engineering provided by this utility model has the following beneficial effects: the first clamp and the second clamp are respectively clamped on the A end and the B end of the cast iron pipe to be docked, and then combined by threaded connection of the threaded pipe sleeve and the threaded part. During the combination process, the two side lobe splicing surfaces of the threaded part come close to each other to compress and deform the first sealing strip to form a seal, which ensures the coaxial alignment of the A end and the B end of the cast iron pipe to be docked, and at the same time, they exist together as part of the pipeline, thus avoiding the drawbacks of welding. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 A cross-sectional structural schematic diagram provided for an embodiment of this utility model; Figure 2 A side view of the first clamping member provided in an embodiment of this utility model.

[0015] Explanation of reference numerals in the attached figures: 1. First clamp; 11. Threaded part; 111. First sealing strip; 12. Second sealing strip; 13. First mounting part; 2. Second clamp; 21. Threaded sleeve; 211. Raised ring; 22. Third sealing strip; 23. Second mounting part; 24. Fourth sealing strip; 25. Sliding groove; 26. Fifth sealing strip; 27. Internal threaded groove; 271. Negative pressure part; 3. External threaded ring; 4. Mesh rubber pad. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0017] Please see Figure 1-2 This utility model provides a technical solution: a quick-connection auxiliary device for cast iron pipes in municipal engineering, comprising a cast iron pipe A end and a cast iron pipe B end to be connected, including a first clamp 1 clamped on the cast iron pipe A end and a second clamp 2 clamped on the cast iron pipe B end, wherein: The first clamp 1 includes a threaded part 11, which is threadedly connected to the internal thread of the threaded sleeve 21 that is slidably disposed on the second clamp 2. The threaded part 11 is composed of two side lobes, and a first sealing strip 111 is provided on the splicing surface of the two; The outer diameter of the threaded part 11 is 0.25mm-0.55mm larger than the inner diameter of the threaded sleeve 21.

[0018] Specifically, the first clamp 1, the second clamp 2, and the threaded pipe sleeve 21 are all cast iron parts with galvanized outer walls.

[0019] Furthermore, the first clamp 1 mentioned above is composed of a first left side part and a first right side part, and a second sealing strip 12 is fixedly provided on the adjacent surfaces of the two parts; Both the first left side and the first right side are provided with a first mounting part 13, which also includes a bolt that passes through the first mounting part 13 on the first left side and the first right side and is fixed by a nut. Through the engagement of the bolt and nut, the circumference formed by the first left side and the first right side is reduced, that is, the distance between them is reduced, thereby compressing and deforming the second sealing strip 12 to eliminate the gap and achieve a seal.

[0020] The second clamp 2 is composed of a second left side part and a second right side part, and a third sealing strip 22 is fixedly provided on the adjacent surfaces of the two parts; A second mounting portion 23 is provided on both the first left side and the first right side, and a bolt is also included. The bolt passes through the second mounting portion 23 on the second left side and the second right side and is fixed by a nut. Through the engagement of the bolt and nut, the circumference formed by the second left side and the second right side is reduced, that is, the distance between them is reduced, thereby compressing and deforming the third sealing strip 22 to eliminate the gap and achieve a seal.

[0021] In the above technology, the first clamp 1 and the second clamp 2 are clamped to the A end and B end of the cast iron pipe to be connected, respectively. Then, they are combined by threaded connection of the threaded sleeve 21 and the threaded part 11. During the combination process, the two side lobe splicing surfaces of the threaded part 11 come close to each other and squeeze to deform the first sealing strip 111 to form a seal. This ensures that the A end and B end of the cast iron pipe to be connected are coaxially aligned and exist together as part of the pipeline, thus avoiding the drawbacks of welding.

[0022] As a further embodiment of this utility model, combined with Figure 1 As shown, the end of the threaded sleeve 21 is provided with a fourth sealing strip 24 that deforms in contact with the sidewalls of the second left and second right sides.

[0023] Specifically, when the threaded sleeve 21 is assembled to the end of the air hole and abuts against the side wall of the first clamp 1, the fourth sealing strip 24 deforms due to the contact, so as to eliminate the gap between the two and increase the sealing performance.

[0024] As another embodiment further provided by this utility model, combined with Figure 1 As shown, a sliding groove 25 is provided on the second left side and the second right side. A protruding ring 211 is fixedly provided at one end of the threaded sleeve 21 relative to the fourth sealing strip 24. The protruding ring 211 and the sliding groove 25 are inserted into each other.

[0025] Furthermore, a fifth sealing strip 26 is fixedly installed on the side wall of the protruding ring portion 211 facing the fourth sealing strip 24.

[0026] Specifically, the second left side and the second right side are combined to fix the threaded sleeve 21, while the convex ring 211 and the threaded sleeve 21 are located in the slide groove 25, and the slide groove 25 and the convex ring 211 form a limiting fit to prevent the threaded sleeve 21 from coming out of the slide groove 25.

[0027] When the fourth sealing strip 24 deforms due to contact, the fifth sealing strip 26 simultaneously contacts the end side wall of the groove 25, thereby deforming to eliminate the gap between the two and increase the sealing performance.

[0028] As another embodiment further provided by this utility model, combined with Figure 1As shown, the second clamp 2 has an internal thread groove 27 at one end relative to the threaded sleeve 21, and the second clamp 2 has a negative pressure part 271 as part of the side wall of the internal thread groove 27. It also includes an external threaded ring 3 that is threaded to the internal threaded groove 27 to reduce the circumference of the negative pressure part 271 to a predetermined value.

[0029] Specifically, after the second clamp 2 is fixed, it is then threadedly connected to the inner thread groove 27 through the outer threaded ring 3, thereby reducing the circumference of the negative pressure part 271 to a predetermined value.

[0030] Because the first clamp 1 and the second clamp 2 are provided with a mesh rubber pad 4 on the side wall that contacts the cast iron pipe. Through the engagement of bolts and nuts, and the external threaded ring 3, the mesh rubber pad 4 is deformed under pressure to eliminate the gap between them and increase the sealing performance.

[0031] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cast iron pipe rapid butt joint auxiliary device for municipal engineering, comprising a cast iron pipe A end and a cast iron pipe B end to be butt jointed, characterized in that, Includes a first clamp (1) clamped on end A of the cast iron pipe and a second clamp (2) clamped on end B of the cast iron pipe, wherein: The first clamp (1) includes a threaded part (11), which is threadedly connected to the internal thread of the threaded sleeve (21) that is slidably disposed on the second clamp (2); The threaded part (11) is composed of two side lobes, and a first sealing strip (111) is provided on the splicing surface of the two. The outer diameter of the threaded part (11) is 0.25mm-0.55mm larger than the inner diameter of the threaded sleeve (21).

2. A device for rapid butt joining of cast iron pipes for municipal works according to claim 1, characterized in that, The first clamp (1) is composed of a first left side part and a first right side part, and a second sealing strip (12) is fixedly provided on the adjacent surfaces of the two. Both the first left side and the first right side are provided with a first mounting part (13), and also include bolts that pass through the first mounting parts (13) on the first left side and the first right side and are fixed by nuts.

3. A device for rapid butt joining of cast iron pipes for municipal works according to claim 2, characterized in that, The second clamp (2) is composed of a second left side part and a second right side part, and a third sealing strip (22) is fixedly provided on the adjacent surfaces of the two parts. The first left side and the first right side are each provided with a second mounting part (23), and also include bolts that pass through the second mounting parts (23) on the second left side and the second right side and are fixed by nuts.

4. A device for rapid butt joining of cast iron pipes for municipal works according to claim 3, characterized in that, The end of the threaded sleeve (21) is provided with a fourth sealing strip (24) that deforms in contact with the sidewalls of the second left and second right sides.

5. The auxiliary device for quick connection of cast iron pipes in municipal engineering according to claim 4, characterized in that, The second left side and the second right side are provided with a sliding groove (25). The threaded sleeve (21) is fixedly provided with a convex ring (211) at one end opposite to the fourth sealing strip (24). The convex ring (211) and the sliding groove (25) are inserted into each other.

6. The auxiliary device for quick connection of cast iron pipes in municipal engineering according to claim 5, characterized in that, A fifth sealing strip (26) is fixedly installed on the side wall of the protruding ring (211) facing the fourth sealing strip (24).

7. The auxiliary device for quick connection of cast iron pipes in municipal engineering according to claim 1, characterized in that, The second clamp (2) has an internal thread groove (27) at one end relative to the threaded sleeve (21), and the second clamp (2) is a negative pressure part (271) as part of the side wall of the internal thread groove (27). It also includes an external threaded ring (3) that is threaded to the internal threaded groove (27) to reduce the circumference of the negative pressure part (271) to a predetermined value.

8. The auxiliary device for quick connection of cast iron pipes in municipal engineering according to claim 1, characterized in that, The first clamp (1) and the second clamp (2) are provided with a mesh rubber pad (4) on the side wall that contacts the cast iron pipe.

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