Iron-plastic pipeline crossover coupling structure

Abstract

The utility model discloses an iron-plastic pipeline adapter structure. A first barrel of an adapter is connected with a plastic pipe in an inserted mode, and normal glue and a clamp are adopted for fixing, so that the risk of water leakage and gas leakage can be avoided; the other end of the adapter is in a socket notch form, the cast iron pipe is clamped by the shell, so that water flow cannot pass through an interface position of the cast iron pipe, and a rubber ring is arranged at the second barrel, so that air leakage caused by size deviation of the cast iron pipe is avoided; the plastic pipe and the cast iron pipe are connected through the adapter, so that connection transition of a soft pipe such as the plastic pipe and a hard pipe such as the cast iron pipe is smoother, the shape of the joint position is similar to that of a common pipe fitting, the forming is attractive, and the sealing performance is good; and a telescopic space is formed in the joint position, so that the flexibility is relatively high.

Description

Technical Field

[0001] The utility model relates to the field of pipeline conversion joints, in particular to an iron-plastic pipeline conversion joint structure. Background Art

[0002] At the construction site, there are situations where cast iron pipes and plastic pipes need to be connected. When encountering this situation, a soft connection method is generally adopted in which the cast iron pipe is directly plugged into the plastic pipe, and fixed by clamping the joint. This treatment method makes the interface exposed to the outside, the joint position is abrupt and poorly formed, and the appearance is not beautiful. The inner diameter of the plastic pipe and the cast iron pipe may be the same, but there is a difference in the outer diameter, which makes the two cannot be completely sealed, and there is a risk of odor or water leakage. Utility Model Content

[0003] The utility model aims to provide an iron-plastic pipe conversion joint structure to solve technical problems such as unstable connection between plastic pipes and cast iron pipes, risks of water leakage and air leakage, poor joint position molding, and unsightly appearance.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides an iron-plastic pipe conversion joint structure, comprising an adapter, the two ends of which are respectively connected to a plastic pipe and a cast iron pipe; the adapter comprises a first cylinder, a shell, and a second cylinder; the top end of the first cylinder is inserted and arranged in the plastic pipe, and a clamp is clamped and arranged on the outer side surface of the joint between the first cylinder and the plastic pipe, which is used to strengthen the connection between the first cylinder and the plastic pipe; the bottom end of the first cylinder is provided with a shell, and the top surface of the shell is provided with an annular top plate, the outer edge of the annular top plate is flush with the outer side surface of the shell, and the inner edge of the annular top plate is fixedly connected to the outer side surface of the bottom end of the first cylinder; the bottom end of the shell is open, the top end of the second cylinder is inserted and arranged in the shell and fixedly connected to the lower end surface of the annular top plate, the bottom end of the second cylinder is inserted and arranged in the cast iron pipe, the cast iron pipe is inserted and arranged in the shell, and the outer side surface of the upper end of the cast iron pipe is tightly arranged with the inner side surface of the shell; the lower outer side surface of the second cylinder is provided with a rubber ring, which is used to increase the friction and air tightness between the second cylinder and the cast iron pipe.

[0006] Preferably, airtight glue is applied at the joint between the first cylinder and the plastic tube.

[0007] Preferably, the first cylinder, the shell and the second cylinder are all made of plastic.

[0008] Preferably, the first cylinder, the shell and the second cylinder are integrally formed.

[0009] Preferably, the outer side surface of the shell is provided with convex patterns distributed at intervals, the convex patterns are strip-shaped and are arranged along the length direction of the pipe to enhance friction.

[0010] Preferably, evenly distributed protrusions are provided on the outer side of the shell to enhance friction.

[0011] Preferably, the rubber ring is bonded and fixed to the second cylinder.

[0012] The beneficial effects of the utility model are embodied in:

[0013] 1) The utility model provides an iron-plastic pipe conversion joint structure. Since PVC-U pipes and other plastic pipes are now relatively mature industries and meet the national standard size and wall thickness with extremely small errors, ordinary plastic pipe fittings (two-way and three-way) can be connected with the plastic pipe by the first cylinder of the conversion joint and fixed with normal glue and clamps to ensure that there is no risk of water leakage and air leakage; the other end of the conversion joint uses a socket notch, and the shell clamps the cast iron pipe to prevent water from passing through the interface of the cast iron pipe, and there is a rubber ring at the second cylinder to avoid air leakage caused by size deviation of the cast iron pipe.

[0014] 2) The utility model provides an iron-plastic pipe conversion joint structure, which uses a conversion joint to connect the plastic pipe and the cast iron pipe, so that the connection transition between the soft pipe such as the plastic pipe and the hard pipe such as the cast iron pipe is smoother and smoother. The shape of the joint position is similar to that of an ordinary pipe accessory, with beautiful molding and good airtightness; and there is space for expansion and contraction at the joint position, which has strong flexibility.

[0015] 3) The utility model provides an iron-plastic pipe conversion joint structure, which is provided with convex patterns or convex dots on the outer side of the shell, so that when workers use the conversion joint to connect with a plastic pipe or a cast iron pipe, they can increase the contact area and enhance the friction by grasping the shell with their hands, which is convenient for better force and makes the conversion joint easier to install.

[0016] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The main purpose and other advantages of the utility model can be realized and obtained by the solutions particularly pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a stereogram of the adapter of the utility model.

[0020] Figure 3 It is a schematic diagram of the convex pattern of the utility model.

[0021] Figure 4It is a schematic diagram of the convex point of the utility model.

[0022] Figure numerals: 1-adapter, 11-first cylinder, 12-shell, 13-second cylinder, 14-ring top plate, 15-convex pattern, 16-convex point, 2-plastic pipe, 3-cast iron pipe, 4-clamp, 5-rubber ring. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is described in detail below through embodiments. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, but cannot be interpreted as limiting the technical solution of the present invention.

[0024] Reference Figure 1-2 The present embodiment provides an iron-plastic pipe conversion joint structure, including a conversion joint 1, the two ends of which are respectively connected to a plastic pipe 2 and a cast iron pipe 3; the conversion joint 1 includes a first cylinder 11, a shell 12, and a second cylinder 13, the first cylinder 11, the shell 12 and the second cylinder 13 are all made of plastic material and are integrally formed; the top end of the first cylinder 11 is inserted and arranged in the plastic pipe 2, the joint of the first cylinder 11 and the plastic pipe 2 is coated with airtight glue, and the outer side surface of the joint of the first cylinder 11 and the plastic pipe 2 is clamped with a clamp 4 for strengthening the connection between the first cylinder 11 and the plastic pipe 2; the bottom end of the first cylinder 11 is provided with a shell 12, and the shell 1 2 is provided with an annular top plate 14, the outer edge of the annular top plate 14 is flush with the outer side surface of the shell body 12, and the inner edge of the annular top plate 14 is fixedly connected to the outer side surface of the bottom end of the first cylinder 11; the bottom end of the shell body 12 is open, the top end of the second cylinder 13 is inserted and arranged inside the shell body 12 and fixedly connected to the lower end surface of the annular top plate 14, the bottom end of the second cylinder 13 is inserted and arranged in the cast iron pipe 3, the cast iron pipe 3 is inserted and arranged inside the shell body 12, and the outer side surface of the upper end of the cast iron pipe 3 is tightly arranged with the inner side surface of the shell body 12; the rubber ring 5 is bonded and fixed to the lower outer side surface of the second cylinder 13 to increase the friction and air tightness between the second cylinder 13 and the cast iron pipe 3.

[0025] Reference Figure 3 The outer side surface of the shell 12 is provided with convex grooves 15 distributed at intervals. The convex grooves 15 are strip-shaped and are arranged along the length of the pipe to enhance friction.

[0026] Reference Figure 4 The outer side of the shell 12 may also be provided with evenly distributed protrusions 16 to enhance friction.

[0027] Furthermore, when the utility model is in use: when installing the adapter 1, you can choose to connect the plastic pipe 2 or the cast iron pipe 3 first; screw the bottom end of the second cylinder 13 into the cast iron pipe 3 and ensure that the rubber ring 5 is in close contact with the inner wall of the cast iron pipe 3, insert the end of the cast iron pipe 3 into the shell 12 and clamp it; insert the first cylinder 11 into the plastic pipe 2 and fix it tightly, and then apply airtight glue at the joint between the first cylinder 11 and the plastic pipe 2 to prevent the risk of leakage, and then add a clamp 4 on the outer side of the joint to further increase the airtightness and stability of the joint, and thus complete the installation process of the utility model; in actual use, if it is necessary to fine-tune the length of the joint position, the limited telescopic function can be achieved by adjusting the depth of the cast iron pipe 3 inserted into the shell 12 to meet the actual installation requirements.

[0028] The above description is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that a technician familiar with the technical field thinks of within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. An iron-plastic pipe conversion joint structure, characterized by: It comprises an adapter (1), the two ends of which are respectively connected to a plastic pipe (2) and a cast iron pipe (3); The adapter (1) comprises a first cylinder (11), a shell (12), and a second cylinder (13); The top end of the first cylinder (11) is inserted into the plastic tube (2), and a clamp (4) is provided on the outer side of the joint between the first cylinder (11) and the plastic tube (2) to strengthen the connection between the first cylinder (11) and the plastic tube (2); A shell (12) is disposed at the bottom end of the first cylinder (11), and a ring top plate (14) is disposed on the top surface of the shell (12); the outer edge of the ring top plate (14) is flush with the outer side surface of the shell (12), and the inner edge of the ring top plate (14) is fixedly connected to the outer side surface of the bottom end of the first cylinder (11); The bottom end of the shell (12) is open, the top end of the second cylinder (13) is inserted into the inside of the shell (12) and fixedly connected to the lower end surface of the ring top plate (14), the bottom end of the second cylinder (13) is inserted into the cast iron pipe (3), the cast iron pipe (3) is inserted into the inside of the shell (12), and the outer side surface of the upper end of the cast iron pipe (3) is tightly arranged against the inner side surface of the shell (12); A rubber ring (5) is provided on the lower outer side surface of the second cylinder (13) for increasing the friction and air tightness between the second cylinder (13) and the cast iron pipe (3).

2. The iron-plastic pipe conversion joint structure according to claim 1, characterized in that: The joint between the first cylinder (11) and the plastic tube (2) is coated with airtight glue.

3. The iron-plastic pipe conversion joint structure according to claim 1, characterized in that: The first cylinder (11), the shell (12) and the second cylinder (13) are all made of plastic.

4. The iron-plastic pipe conversion joint structure as claimed in claim 3, characterized in that: The first cylinder (11), the shell (12) and the second cylinder (13) are integrally formed.

5. The iron-plastic pipe conversion joint structure according to claim 1, characterized in that: The outer side surface of the shell (12) is provided with convex patterns (15) distributed at intervals. The convex patterns (15) are strip-shaped and are arranged along the length of the pipe to enhance friction.

6. The iron-plastic pipe conversion joint structure according to claim 1, characterized in that: Evenly distributed protrusions (16) are provided on the outer side surface of the shell (12) to enhance friction.

7. The iron-plastic pipe conversion joint structure according to claim 1, characterized in that: The rubber ring (5) is bonded and fixed to the second cylinder (13).

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