Stainless steel ball valve integrated steel-plastic conversion joint
By combining the integrated design of the stainless steel ball valve with the bamboo-shaped raised ring and O-ring, the problem of leakage in the connection between the steel ball valve and the steel-plastic converter is solved, achieving efficient and stable gas delivery.
Patent Information
- Application Number
- CN202520242253.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-02-17
AI Technical Summary
The existing threaded connection between steel ball valves and steel-plastic converters is prone to abnormal winding or insufficient tightening force, leading to leakage risk. In addition, the existing joint design is complex, which increases the risk of leakage at the connection.
The stainless steel ball valve features an integrated design. Through the combination of the press-fit extension end, bamboo-shaped protruding ring, and O-ring, it achieves an interference fit with the gas PE pipe. The operating handle is secured with special-shaped and locking kits to prevent misoperation by non-professionals.
It improves the ease of connection and sealing, reduces the risk of leakage, simplifies the interface structure, avoids the instability of threaded connections, and enhances the impact resistance of PE pipes.
Smart Images
Figure CN223895389U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of gas pipelines, specifically, it relates to an integrated steel-plastic conversion joint for a stainless steel ball valve. Background Technology
[0002] Steel-plastic conversion pipe fittings are mechanical pipe fittings composed of a PE section, a steel pipe section, and a rigid internal insert or locking ring. They are a special integrated joint that connects buried PE pipes and steel gas pipes. The connection methods with the steel pipe include threaded connection, welding, and flange connection. Threaded connection is commonly used for steel pipe specifications of 2 inches or less. During installation, a steel ball valve is connected to control the opening and closing function of the gas pipeline.
[0003] Due to on-site construction, steel ball valves and steel-plastic conversion heads are connected by threads and PTFE tape. Abnormal wrapping of PTFE tape or insufficient tightening force often occurs at the threaded connection, causing leakage at the threaded connection. Therefore, an integrated steel-plastic conversion head for stainless steel ball valves is designed. It is an integral press-fit connection, eliminating the threaded connection joint, reducing one interface, and completely avoiding the risk of leakage of threaded ball valves. 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 an integrated steel-plastic conversion joint for stainless steel ball valves.
[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:
[0006] A stainless steel ball valve integrated steel-plastic conversion joint includes a stainless steel ball valve, a stainless steel locking ring and a gas PE pipe. One end of the stainless steel ball valve is provided with an internal thread interface that connects to the gas pipeline, and the other end of the stainless steel ball valve is provided with a press-fit extension end that communicates with the gas PE pipe. A stainless steel locking ring is sleeved on the outside of the press-fit extension end.
[0007] The stainless steel locking ring and the press-fit extension end are provided with a pressing assembly area for installing the gas PE pipe. The inner surface of the pressing area is a bamboo joint protrusion ring with equal spacing. The bamboo joint protrusion ring is fixed to the outer surface of the press-fit extension end. An O-ring that abuts against the inner wall of the gas PE pipe is fitted on the outer side of the press-fit extension end. The outer surface of the pressing area is provided with a concave and convex surface for the outer surface of the gas PE pipe to abut. The concave and convex surface is set on the inner wall surface of the stainless steel locking ring.
[0008] The stainless steel ball valve has a positioning sleeve fixed at its top, and a reserved area is provided in the middle of the positioning sleeve for the operation handle of the working switch pipeline to rotate.
[0009] Optionally, an extension rod is fixed to the upper end of the operating handle, and a rotating shaft is fixed to both the front and rear ends of the extension rod. The extension rod is rotatably connected to the middle of the irregular kit through the rotating shaft. One end of the irregular kit abuts against the limiting groove of the locking kit, and a handle is fixed to the other end of the irregular kit.
[0010] Optionally, a stud is fixed at the center of the top of the extension rod, and an anti-loosening nut is installed on the outside of the stud.
[0011] Optionally, the limiting grooves are equally spaced on the outer wall of the locking kit, and the locking kit is fitted onto the upper outer side of the positioning sleeve, wherein the middle part of the two limiting grooves is fixed to the positioning sleeve by a fixing bolt.
[0012] Optionally, one end of the irregularly shaped kit is covered with a rubber sleeve, and the outer surface of the rubber sleeve abuts against the inner surface of the limiting groove. The handle is covered with a protective sleeve, and the surface of the protective sleeve is coated with a fluorescent coating.
[0013] Optionally, the upper end of the locking kit is fixed with sleeve blocks for inserting irregular rods at equal intervals, the bottom of the irregular rod is fixed with an adsorption block, and the adsorption block is provided with a magnetic block for magnetic adsorption of the sleeve block. The top of the irregular rod is fixed with a U-shaped block for abutting the outer surface of the other end of the irregular kit.
[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. The device features a bamboo-shaped protruding ring on the external side of the press-fit extension end of the gas PE pipe, which, in conjunction with an O-ring, abuts against the inner wall of the gas PE pipe, causing a corresponding protrusion on the outer surface of the gas PE pipe. Then, a stainless steel locking ring is installed to lock and fix the gas PE pipe fitting end, forming an interference fit in the steel-plastic bonding area, thus completing the assembly. This installation method is based on a rigorously calculated and designed sealing structure, with a minimum inner diameter reduction of no more than 10%. The teeth, designed with passivation treatment and a height not exceeding the proportion of the pipe's scratch depth, will not cause negative impacts such as cutting or crushing on the pipe at the press-fitting location. The PE pipe's impact resistance is improved; it undergoes plastic deformation without breaking upon impact. Compared to existing threaded connections, this method is more convenient and is an integral press-fit connection, eliminating the need for threaded joints, reducing one interface, and completely avoiding the risk of leakage from threaded ball valves.
[0016] 2. This device uses a special-shaped kit, a locking kit, a special-shaped rod, and a U-shaped block to lock the position of the operating handle, thereby preventing non-equipment maintenance personnel from touching the handle and causing it to rotate, which would affect the gas delivery in 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 a top view schematic diagram of the combined component structure of the operating handle, the irregularly shaped kit, and the handle in this utility model;
[0021] Figure 3 This is a top view schematic diagram of the combined component structure of the locking kit, sleeve block and limiting groove in this utility model;
[0022] Figure 4 for Figure 1 A schematic diagram of the structure of part A in the diagram;
[0023] Figure 5 for Figure 1 A schematic diagram of the structure of part B in the diagram;
[0024] Figure 6 for Figure 1 A schematic diagram of the structure of part C in the diagram;
[0025] Figure 7 for Figure 1 A schematic diagram of the structure of part D in the diagram.
[0026] The attached diagram lists the components represented by each number as follows:
[0027] 1. Stainless steel ball valve; 2. Internal threaded interface; 3. Gas PE pipe; 4. Press-fit extension end; 5. Stainless steel locking ring; 6. Bamboo joint raised ring; 7. O-ring; 8. Concave-convex surface; 9. Positioning sleeve; 10. Operating handle; 11. Extension rod; 12. Rotary shaft; 13. Irregularly shaped kit; 14. Locking kit; 15. Limiting groove; 16. Handle; 17. Stud; 18. Anti-loosening nut; 19. Fixing bolt; 20. Rubber sleeve; 21. Protective sleeve; 22. Fluorescent coating; 23. Irregularly shaped rod; 24. Sleeve block; 25. Adsorption block; 26. Magnetic block; 27. U-shaped block.
[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: an integrated stainless steel ball valve and a steel-plastic conversion joint, including a stainless steel ball valve 1, a stainless steel locking ring 5 and a gas PE pipe 3. One end of the stainless steel ball valve 1 is provided with an internal thread interface 2 that connects to the gas pipeline, and the other end of the stainless steel ball valve 1 is provided with a press-fit extension end 4 that communicates with the gas PE pipe 3. The press-fit extension end 4 is fitted with a stainless steel locking ring 5.
[0031] A pressing assembly area for installing a gas PE pipe 3 is provided between the stainless steel locking ring 5 and the pressing extension end 4. The inner surface of the pressing area is provided with bamboo joint protrusion rings 6 evenly distributed. The bamboo joint protrusion rings 6 are fixed on the outer surface of the pressing extension end 4. An O-ring 7 that abuts against the inner wall of the gas PE pipe 3 is provided on the outer side of the pressing extension end 4. The outer surface of the pressing area is provided with a concave-convex surface 8 for the outer surface of the gas PE pipe 3 to abut against. The concave-convex surface 8 is provided on the inner wall surface of the stainless steel locking ring 5.
[0032] A positioning sleeve 9 is fixed to the top of the stainless steel ball valve 1. A reserved area is provided in the middle of the positioning sleeve 9 for the operation handle 10 of the working switch pipeline to rotate. Considering that due to on-site construction, the steel ball valve and the steel-plastic converter are connected by threads and PTFE tape, abnormal wrapping of PTFE tape or insufficient tightening force often occurs at the threaded connection, resulting in leakage at the threaded connection. This device is designed with a bamboo joint protrusion ring 6 on the outside of the press-fit extension end 4 of the gas PE pipe 3, which works in conjunction with the O-ring 7 to abut against the inner wall of the gas PE pipe 3, causing a corresponding protrusion on the outer surface of the gas PE pipe 3. Then, the installation of the stainless steel locking ring 5 is used to lock and fix the gas PE pipe 3 sleeve end. Compared with the existing threaded connection method, it is more convenient and is an integral press-fit connection, eliminating the threaded connection joint, reducing one interface, and completely avoiding the risk of leakage of the threaded ball valve.
[0033] The operating handle 10 has an extension rod 11 fixed at its upper end. A pivot 12 is fixed at both the front and rear ends of the extension rod. The extension rod is rotatably connected to the middle of the irregular-shaped kit 13 through the pivot 12. One end of the irregular-shaped kit 13 abuts against the limiting groove 15 of the locking kit 14, and the other end of the irregular-shaped kit 13 is fixed with a handle 16. By setting the irregular-shaped kit 13 in conjunction with the locking kit 14, the irregular-shaped rod 23, and the U-shaped block 27, the operating handle 10 is locked in position. This prevents non-equipment maintenance personnel from touching the handle 16 and causing the operating handle 10 to rotate, which would affect the gas delivery in the pipeline. One end of the irregular-shaped kit 13 is fixed by abutting against the limiting groove 15 of the locking kit 14, and the other end of the irregular-shaped kit 13 is abutted against the U-shaped block 27. The irregular-shaped rod 23 at the bottom of the U-shaped block 27 is inserted into the inside of the sleeve block 24 and then fixed by using the magnetic block 26 to attract the locking kit 14.
[0034] The extension rod has a stud 17 fixed at the top center, and an anti-loosening nut 18 is installed on the outside of the stud 17.
[0035] The limiting grooves 15 are equally spaced on the outer wall of the locking kit 14. The locking kit 14 is fitted on the upper outer side of the positioning sleeve 9. The middle part of the two limiting grooves 15 is fixed to the positioning sleeve 9 by the fixing bolts 19. The fixing bolts 19 play a role in fixing the locking kit 14 and the positioning sleeve 9.
[0036] One end of the irregular-shaped kit 13 is covered with a rubber sleeve 20, and the outer surface of the rubber sleeve 20 abuts against the inner surface of the limiting groove 15. The handle 16 is covered with a protective sleeve 21, and the surface of the protective sleeve 21 is coated with a fluorescent coating 22. By setting the rubber sleeve 20, the friction between the end in contact with the limiting groove 15 is increased, and the irregular-shaped kit 13 at that end can be protected to prevent the irregular-shaped kit 13 from contacting the limiting groove 15 and causing damage.
[0037] The upper end of the locking kit 14 is fixed with sleeve blocks 24 for the insertion of the irregular rod 23 at equal intervals. The bottom of the irregular rod 23 is fixed with an adsorption block 25, and the adsorption block 25 is provided with a magnetic block 26 for magnetic adsorption of the sleeve block 24. The top of the irregular rod 23 is fixed with a U-shaped block 27 for abutting the outer surface of the other end of the irregular kit 13. The magnetic block 26 is used to fix the irregular rod 23 and the sleeve block 24, so that the U-shaped block 27 abutting the irregular kit 13 can be supported after the irregular rod 23 is inserted into the sleeve block 24, thus preventing the irregular rod 23 from shifting position.
[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 stainless steel ball valve (1) integrated steel-plastic conversion joint, comprising a stainless steel ball valve (1), a stainless steel locking ring (5), and a gas PE pipe (3), characterized in that, The stainless steel ball valve (1) has an internal threaded interface (2) that connects to the gas pipeline at one end, and a press-fit extension end (4) that connects to the gas PE pipe (3) at the other end. A stainless steel locking ring (5) is fitted around the press-fit extension end (4). The stainless steel locking ring (5) and the press-fit extension end (4) are provided with a pressing assembly area for the installation of the gas PE pipe (3). The inner surface of the pressing area is a bamboo joint protrusion ring (6) with equal spacing. The bamboo joint protrusion ring (6) is fixed on the outer surface of the press-fit extension end (4). An O-ring (7) that abuts against the inner wall of the gas PE pipe (3) is sleeved on the outer side of the press-fit extension end (4). The outer surface of the pressing area is provided with a concave-convex surface (8) for the outer surface of the gas PE pipe (3) to abut. The concave-convex surface (8) is set on the inner wall surface of the stainless steel locking ring (5). The stainless steel ball valve (1) has a positioning sleeve (9) fixed at its top end, and a reserved area is provided in the middle of the positioning sleeve (9) for the operation handle (10) of the working switch pipeline to rotate.
2. The stainless steel ball valve (1) integrated steel-plastic conversion joint according to claim 1, characterized in that, An extension rod (11) is fixed to the upper end of the operating handle (10). A pivot (12) is fixed to both the front and rear ends of the extension rod. The extension rod is rotatably connected to the middle of the irregular kit (13) through the pivot (12). One end of the irregular kit (13) abuts against the limiting groove (15) of the locking kit (14). The other end of the irregular kit (13) is fixed with a handle (16).
3. The stainless steel ball valve (1) integrated steel-plastic conversion joint according to claim 2, characterized in that, A stud (17) is fixed at the middle of the top of the extension rod, and an anti-loosening nut (18) is installed on the outside of the stud (17).
4. The stainless steel ball valve (1) integrated steel-plastic conversion joint according to claim 2, characterized in that, The limiting grooves (15) are equally spaced on the outer side wall of the locking kit (14), and the locking kit (14) is sleeved on the upper outer side of the positioning sleeve (9). The middle part of the two limiting grooves (15) is fixed to the positioning sleeve (9) by the fixing bolt (19).
5. The stainless steel ball valve (1) integrated steel-plastic conversion joint according to claim 2, characterized in that, One end of the irregular-shaped kit (13) is covered with a rubber sleeve (20), and the outer surface of the rubber sleeve (20) abuts against the inner surface of the limiting groove (15). The handle (16) is covered with a protective sleeve (21), and a fluorescent coating (22) is applied to the surface of the protective sleeve (21).
6. The stainless steel ball valve (1) integrated steel-plastic conversion joint according to claim 2, characterized in that, The upper end of the locking kit (14) is fixed with sleeve blocks (24) for the insertion of the irregular rod (23) at equal intervals. The bottom of the irregular rod (23) is fixed with an adsorption block (25), and the adsorption block (25) is provided with a magnetic block (26) for magnetic adsorption of the sleeve block (24). The top of the irregular rod (23) is fixed with a U-shaped block (27) for abutting the outer surface of the other end of the irregular kit (13).