Octagonal thread type steel-plastic conversion device based on steel pipe reducing

Abstract

The utility model discloses an outer octagonal thread type steel-plastic conversion device based on steel pipe reducing, and relates to the technical field of steel-plastic conversion pipe fittings. The device comprises a lining steel pipe, an octagonal external member, a buried PE pipe and a locking ring, the octagonal external member is welded outside the middle section of the lining steel pipe, threads connected with a valve body are arranged outside one end of the lining steel pipe, and anti-falling bamboo joint rings used for abutting against the inner wall of the buried PE pipe are arranged outside the other end of the lining steel pipe at equal intervals. An embedding groove for placing the O-shaped ring is further formed in the outer part of the other end of the lining steel pipe; a locking ring is arranged outside the buried PE pipe in a sleeving manner; an auxiliary positioning ring is fixed on the contact surface of the external octagonal external member and the locking ring; according to the utility model, the outside of the lining steel pipe is welded with the external octagonal external member which is convenient for a worker to fix the lining steel pipe so as to prevent the lining steel pipe from position deviation during installation, and the coating on the surface of the lining steel pipe cannot be damaged when the worker fixes the external octagonal external member by using a tool.

Description

Technical Field

[0001] This utility model belongs to the technical field of steel-plastic conversion pipe fittings, specifically, it relates to an external octagonal threaded steel-plastic conversion pipe based on a steel pipe with variable diameter. Background Technology

[0002] The steel-plastic conversion mainly involves the structural design of the assembly part. The quality of its bamboo joint, tooth shape, and compression ratio design determines the sealing performance, end pull-out resistance, and shear resistance of the pipe fitting, which affects its long service life. Due to the different specifications and sizes of PE pipe and steel pipe, the steel-plastic combination part must have a diameter change structure. The proposed structure is based on a steel pipe diameter change and is made in conjunction with PE pipe. Its components consist of PE pipe, O-ring, locking ring, and steel pipe section.

[0003] The existing steel pipe has an epoxy resin anti-corrosion coating on its outer wall. When it is connected to a PE pipe, it needs to be tightened with pipe wrenches. Tightening will cause damage to the anti-corrosion layer, which is easy to damage. After construction, the anti-corrosion layer needs to be repaired again. In view of this, this utility model is proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a steel-plastic conversion based on the external octagonal thread of a steel pipe with variable diameter.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] An external octagonal threaded steel-plastic conversion based on a steel pipe with variable diameter includes an inner steel pipe, an external octagonal fitting, a buried PE pipe, and a locking ring. The external octagonal fitting is welded to the outside of the middle section of the inner steel pipe. A thread for connecting to a valve body is opened on the outside of one end of the inner steel pipe. Anti-detachment bamboo joint rings for abutting against the inner wall of the buried PE pipe are provided at equal intervals on the outside of the other end of the inner steel pipe. An embedding groove for placing O-rings is also opened on the outside of the other end of the inner steel pipe.

[0007] The outer casing of the buried PE pipe is equipped with a locking ring;

[0008] An auxiliary positioning ring is fixed to the contact surface between the outer octagonal assembly and the locking ring.

[0009] Optionally, the auxiliary positioning ring has an alignment groove in the middle of its side end that matches the outer dimensions of the side end of the locking ring. A silicone protective pad is fixed to the inner wall of the alignment groove, and a magnet for magnetically adsorbing the locking ring is fixed inside the auxiliary positioning ring.

[0010] Optionally, the insertion end ports of the locking ring and the auxiliary positioning ring are designed with arc chamfers, and an anti-slip groove is provided on the inner wall of the locking ring to prevent the buried PE pipe from slipping out.

[0011] Optionally, the insertion end of the inner steel pipe and the buried PE pipe is designed with an arc-shaped chamfer.

[0012] Optionally, the outer surfaces of the locking ring, the outer octagonal fitting, and the inner steel liner are all coated with a zinc-chromium anti-corrosion coating.

[0013] Optionally, an expansion ring is fixed to the outside of the locking ring, and one side of the expansion ring is a concave surface.

[0014] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art. Of course, any product implementing this utility model does not necessarily need to achieve all of the following advantages at the same time:

[0015] 1. This utility model has an outer octagonal fitting welded to the outside of the inner steel pipe to facilitate workers in fixing the inner steel pipe and prevent it from shifting during installation. Secondly, when workers use tools to fix the outer octagonal fitting, the coating on the surface of the inner steel pipe will not be damaged.

[0016] 2. In order to improve the tightness of the locking ring between the buried PE pipe and the inner steel pipe, this utility model designs an auxiliary positioning ring, so that the side end of the tightened locking ring will be inserted into the alignment groove in the middle of the auxiliary positioning ring. At this time, the locking ring and the auxiliary positioning ring will form a secondary fixation. After the auxiliary positioning ring and the locking ring are inserted, the magnetic force of the magnet inside the auxiliary positioning ring can also be used to attract the locking ring, thereby further improving the overall stability of the pipeline.

[0017] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0019] Figure 1 This is a schematic diagram of the front cross-sectional structure of this utility model;

[0020] Figure 2 This is an external view of the combined component structure of the inner steel pipe, the outer octagonal kit, and the anti-detachment bamboo joint ring in this utility model;

[0021] Figure 3 This is a side view schematic diagram of the combined component structure of the octagonal kit, auxiliary positioning ring, and silicone protective pad of this utility model;

[0022] Figure 4 This is a side sectional view of the combined component structure of the octagonal kit, silicone protective pad, and magnet of this utility model.

[0023] Figure 5for Figure 1 A schematic diagram of the structure of part A in the diagram;

[0024] Figure 6 for Figure 1 A schematic diagram of the structure of part B in the diagram;

[0025] Figure 7 for Figure 4 A schematic diagram of the structure of part C in the diagram.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Inner steel pipe; 2. Outer octagonal fitting; 3. Buried PE pipe; 4. Anti-detachment bamboo joint ring; 5. O-ring; 6. Locking ring; 7. Auxiliary positioning ring; 8. Silicone protective pad; 9. Magnet; 10. Anti-reverse groove; 11. Expansion ring.

[0028] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings.

[0030] Please see Figures 1 to 7 This utility model provides a technical solution: a steel-plastic conversion based on a steel pipe with a variable diameter external octagonal thread, including an inner steel pipe 1, an external octagonal fitting 2, a buried PE pipe 3 and a locking ring 6. The external octagonal fitting 2 is welded to the outside of the middle section of the inner steel pipe 1. A thread for connecting to a valve body is opened on the outside of one end of the inner steel pipe 1. Anti-detachment bamboo joint rings 4 for abutting against the inner wall of the buried PE pipe 3 are provided at equal intervals on the outside of the other end of the inner steel pipe 1. An embedding groove for placing an O-ring 5 is also opened on the outside of the other end of the inner steel pipe.

[0031] The outer casing of the buried PE pipe 3 is equipped with a locking ring 6;

[0032] An auxiliary positioning ring 7 is fixed to the contact surface between the outer octagonal fitting 2 and the locking ring 6. Considering that the existing steel pipe outer wall is epoxy resin anti-corrosion, it is necessary to use pipe wrenches to tighten it when connecting with PE pipe. Tightening will cause damage to the anti-corrosion layer, which is easy to damage. After construction, the anti-corrosion layer needs to be re-maintained. This utility model welds an outer octagonal fitting 2 to the outside of the inner steel pipe 1 to fix the inner steel pipe 1 and prevent it from shifting during installation. Secondly, when the worker uses tools to fix the outer octagonal fitting 2, it will not damage the coating on the surface of the inner steel pipe 1. During assembly, first install the O-ring 5 in the groove at the other end of the inner steel pipe 1, then press the buried PE pipe into the port of the inner steel pipe 1 and the buried plug end, and finally press the locking ring 6 sleeved on the outside of the buried PE pipe 3 into the outside of the buried PE pipe 3 in the installation area to form an interference fit in the steel-plastic joint area and complete the assembly.

[0033] The auxiliary positioning ring 7 has an alignment groove in the middle of its side end that matches the external dimensions of the side end of the locking ring 6. A silicone protective pad 8 is fixed to the inner wall of the alignment groove, and a magnet 9 for magnetically adsorbing the locking ring 6 is fixed inside the auxiliary positioning ring. In order to improve the tightness between the locking ring 6 and the buried PE pipe 3 and the inner steel pipe 1, the auxiliary positioning ring 7 is designed so that the side end of the locked ring 6 after being compressed will be inserted into the alignment groove in the middle of the auxiliary positioning ring 7. At this time, the locking ring 6 will form a secondary fixation with the auxiliary positioning ring 7. After the auxiliary positioning ring 7 is inserted into the locking ring 6, the magnet 9 inside the auxiliary positioning ring 7 can also be used to magnetically adsorb the locking ring 6, thereby further improving the overall stability of the pipeline.

[0034] The locking ring 6 and the auxiliary positioning ring 7 have an arc-shaped chamfered end design. The inner wall of the locking ring 6 is provided with a backstop groove 10 to prevent the buried PE pipe 3 from slipping off. By setting the arc-shaped chamfered end design of the locking ring 6 and the auxiliary positioning ring 7, the locking ring 6 will not cause damage to the contact end when it is fitted onto the outer surface of the buried PE pipe 3. The presence of the backstop groove 10 means that after the inner wall of the buried PE pipe 3 expands through the anti-slip bamboo joint ring 4, the protruding surface of the buried PE pipe 3 will abut into the inside of the backstop groove 10, preventing the locking ring 6 from slipping off the buried PE pipe 3.

[0035] The insertion end of the inner steel pipe 1 and the buried PE pipe 3 is designed with an arc-shaped chamfer. By setting the insertion end of the inner steel pipe 1 and the buried PE pipe 3 to have an arc-shaped chamfer, the contact surface will not be damaged when the inner steel pipe 1 is inserted into the buried PE pipe 3.

[0036] The outer surfaces of the locking ring 6, the outer octagonal kit 2, and the inner steel pipe 1 are all coated with a zinc-chromium anti-corrosion coating. The zinc-chromium anti-corrosion coating provides corrosion protection for the outer surfaces of the locking ring 6, the outer octagonal kit 2, and the inner steel pipe 1, thereby improving the service life of the components.

[0037] The locking ring 6 is externally fixed with an expansion ring 11, and one side of the expansion ring 11 is concave. The expansion ring 11 facilitates the user's movement of the locking ring 6.

[0038] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A steel-plastic conversion method based on a steel pipe with an external octagonal thread, comprising an inner steel pipe (1), an external octagonal fitting (2), a buried PE pipe (3), and a locking ring (6), characterized in that, The middle section of the inner steel pipe (1) is welded with an outer octagonal fitting (2). A thread for connecting the valve body is opened on the outside of one end of the inner steel pipe (1). An anti-detachment bamboo joint ring (4) for abutting against the inner wall of the buried PE pipe (3) is provided at equal intervals on the outside of the other end of the inner steel pipe (1). An embedded groove for placing the O-ring (5) is also opened on the outside of the other end of the inner scraper steel pipe. The outer sleeve of the buried PE pipe (3) is provided with a locking ring (6); An auxiliary positioning ring (7) is fixed to the contact surface between the outer octagonal kit (2) and the locking ring (6).

2. The steel-plastic conversion method based on an external octagonal thread of a steel pipe with variable diameter as described in claim 1, characterized in that, The auxiliary positioning ring (7) has an alignment groove in the middle of its side end that matches the outer size of the side end of the locking ring (6). A silicone protective pad (8) is fixed on the inner wall of the alignment groove, and a magnet (9) for magnetic adsorption of the locking ring (6) is fixed inside the auxiliary positioning ring.

3. The steel-plastic conversion method based on an external octagonal thread of a steel pipe with variable diameter as described in claim 1, characterized in that, The insertion end of the locking ring (6) and the auxiliary positioning ring (7) is designed with an arc-shaped chamfer. An anti-slip groove (10) is provided on the inner wall of the locking ring (6) to prevent the buried PE pipe (3) from slipping.

4. The steel-plastic conversion method based on an external octagonal thread of a steel pipe with variable diameter as described in claim 1, characterized in that, The insertion end of the inner steel pipe (1) and the buried PE pipe (3) is designed with an arc-shaped chamfer.

5. The steel-plastic conversion method based on an external octagonal thread of a steel pipe with variable diameter as described in claim 1, characterized in that, The outer surfaces of the locking ring (6), the outer octagonal kit (2), and the inner steel pipe (1) are all coated with a zinc-chromium anti-corrosion coating.

6. The steel-plastic conversion method based on an external octagonal thread of a steel pipe with variable diameter as described in claim 1, characterized in that, An expansion ring (11) is fixed to the outside of the locking ring (6), and one side of the expansion ring (11) is concave.

Images