Integrated water outlet type gas cylinder end device
By integrating a drain outlet type gas cylinder end device, the problems of side openings and welding defects in traditional gas cylinders are solved, thereby improving the overall strength and sealing of the gas cylinder. It is suitable for composite material gas cylinders and promotes automotive lightweighting and environmental protection policies.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-03-10
AI Technical Summary
Traditional vehicle gas cylinders have holes on the side of the cylinder body, which affects strength. Welding processes can lead to weld slag residue and sealing problems, affecting vehicle safety.
The gas cylinder end device adopts an integrated drain outlet type. The end is integrally processed and formed, integrating the drain outlet with the metal sealing end, avoiding openings and welding defects in the cylinder body. It uses composite materials and hollow hoses to achieve drainage.
Improve the overall strength of the gas cylinder, ensure its sealing and cleanliness, meet the requirements of lightweighting and energy conservation and emission reduction, and enhance vehicle safety.
Smart Images

Figure CN223985061U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts technology, and in particular to an integrated drain outlet type gas cylinder end device. Background Technology
[0002] Currently, traditional automotive gas cylinders are made of steel or aluminum. The drain and inlet / outlet ports are located on the side of the cylinder body, requiring welding after the openings are made. Since the cylinder stores compressed air at a pressure of 0.8–1.25 MPa during operation, the openings significantly impact the cylinder's strength. Furthermore, the welding process introduces weld slag and voids, affecting the cylinder's cleanliness and sealing performance. Weld slag can easily clog the air passages, leading to leaks and vehicle malfunctions. See details... Figure 1 .
[0003] The main problems with traditional vehicle gas cylinders currently on the market include the following two points:
[0004] 1. Structural defects: The main body of the gas cylinder is cylindrical and there is a certain pressure inside. The side of the gas cylinder is a weak point in terms of stress strength. Opening holes in the side wall of the gas cylinder disrupts the consistency of the product materials, which can easily cause stress concentration and lead to the risk of product breakage.
[0005] 2. Defects in the processing technology: The use of welding technology may result in residual welding slag inside the product, affecting the cleanliness of the gas cylinder. If welding slag enters the vehicle's gas system, it will affect the vehicle's driving safety. At the same time, the welding process is prone to creating porosity defects, which may affect the gas cylinder's sealing performance, also affecting the vehicle's driving safety. Utility Model Content
[0006] In view of the above problems, the purpose of this utility model is to provide an integrated drain outlet type gas cylinder end device, which is made by integral processing of the end, without welding defects such as welding slag and pores, so as to overcome the shortcomings of the above-mentioned prior art.
[0007] This utility model provides an integrated drain outlet type gas cylinder end device, comprising: a circular gas cylinder body, a threaded cylinder mouth opened on one end of the circular gas cylinder body, a metal sealing end threadedly connected to the threaded cylinder mouth, a threaded through hole opened on the metal sealing end, a drain connector threadedly connected to the threaded through hole, a drain pipe connected to the drain connector and extending into the circular gas cylinder body, a drain valve installed on the side of the drain connector away from the threaded cylinder mouth, the side of the drain connector near the threaded cylinder mouth communicating with the drain pipe, and the drain pipe extending to the bottom of the interior of the circular gas cylinder body.
[0008] As a preferred embodiment of this utility model, the metal sealing end is further provided with a gas cylinder inlet, a gas cylinder outlet, and a detection interface.
[0009] As a preferred embodiment of this invention, the two ends of the circular gas cylinder are die-cast or cast.
[0010] As a preferred embodiment of this invention, the circular gas cylinder body is made of plastic or nylon.
[0011] As a preferred embodiment of this invention, the drain connector is an intermediate adapter made of stainless steel.
[0012] As a preferred embodiment of this invention, the drain pipe is a hollow flexible tube made of silicone or rubber.
[0013] As a preferred embodiment of the present invention, the circular gas cylinder body includes an outer fiber resin shell and an inner liner located inside the shell; the inner liner has a threaded nozzle on one end.
[0014] As a preferred embodiment of this invention, the fiber resin outer shell is provided with end protective sleeves on both sides of the inner liner.
[0015] As a preferred embodiment of this invention, a sealing ring is provided inside the threaded bottle neck. The beneficial effects of this invention are as follows:
[0016] 1. The gas cylinder body of this utility model has no openings, and all interfaces are concentrated at both ends of the gas cylinder, which improves the integrity and consistency of the gas cylinder body, increases the product strength, and solves the problem of product breakage risk caused by openings on the side of the cylinder body.
[0017] 2. This utility model adopts an integrated end-to-end machining process, eliminating welding defects such as weld slag and pores.
[0018] 3. This utility model achieves integrated processing of the gas cylinder drain outlet and the metal end, solving the problem that the drain outlet of the vehicle type IV gas cylinder needs to be opened on the side of the cylinder body. At the same time, it solves the problem that the opening on the side of the cylinder body affects the overall strength of the product, thereby promoting the market application of composite material type IV gas cylinders and meeting the current market demand for automotive lightweighting. It also conforms to the national policy of promoting comprehensive energy conservation and emission reduction. Attached Figure Description
[0019] Other objects and results of this invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings, and with a more complete understanding of the invention. In the drawings:
[0020] Figure 1 Schematic diagram of existing gas cylinders.
[0021] Figure 2 This is a partial schematic diagram of the gas cylinder in this embodiment.
[0022] Figure 3 This is one of the schematic diagrams of the gas cylinder in this embodiment.
[0023] Figure 4 This is the second schematic diagram of the gas cylinder in this embodiment.
[0024] Attached reference numerals: 1. Circular gas cylinder body; 2. Threaded cylinder mouth; 3. Metal sealing end; 4. Threaded through hole; 5. Drain connector; 6. Drain pipe; 7. Drain valve; 8. End protective sleeve; 9. Outer shell; 10. Inner liner. Detailed Implementation
[0025] See Figures 1-4 As shown, this embodiment provides an integrated drain outlet type gas cylinder end device, comprising: a circular gas cylinder body 1, a threaded cylinder mouth 2 opened on one end of the circular gas cylinder body 1, a metal sealing end 3 threadedly connected to the threaded cylinder mouth 2, a threaded through hole 4 opened on the metal sealing end 3, a drain connector 5 threadedly connected to the threaded through hole 4, a drain pipe 6 connected to the drain connector 5 and extending into the circular gas cylinder body 1, a drain valve 7 installed on the side of the drain connector 5 away from the threaded cylinder mouth, and the side of the drain connector 5 near the threaded cylinder mouth communicating with the drain pipe, the drain pipe 6 extending to the bottom end of the circular gas cylinder body. The metal sealing end 3 is also provided with a gas cylinder inlet, a gas cylinder outlet, and a detection interface.
[0026] Furthermore, in this embodiment, the two ends 3 of the circular gas cylinder are die-cast or cast, and the circular gas cylinder body 1 is made of plastic or nylon + resin fiber winding. The circular gas cylinder body 1 includes an outer fiber resin shell 9 and an inner plastic or nylon liner 10 located inside the shell 9. The inner liner 10 has threaded bottle mouths 2 on both ends of the inner liner 10, and the fiber resin shell 9 is provided with end protective sleeves 8 on both sides of the inner liner 10.
[0027] Furthermore, in this embodiment, the drain connector 5 is an intermediate adapter made of stainless steel, and the drain pipe 6 is a hollow flexible tube made of silicone or rubber.
[0028] Working principle: During installation, the drain pipe 6 and drain connector 5 are assembled, and then the drain connector 5 is installed on the metal sealing end 3. When installing with the circular gas cylinder body 1, the side with the drain pipe 6 faces inwards towards the inside of the circular gas cylinder body 1, and the drain valve 7 is installed on the other side of the metal sealing end 3. When the circular gas cylinder body 1 is working normally, there is a certain working pressure inside. When the drain valve 7 is opened, water is discharged out of the gas cylinder under the action of internal pressure. In this design, the drain outlet is integrated on one side of the end of the circular gas cylinder body 1, and a drain pipe 6 extends inwards along the interface, so that the water at the bottom can also be discharged out of the cylinder, thus realizing the drainage function.
[0029] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. An integrated drain port type cylinder end device, characterized by, The utility model relates to a circular gas cylinder, which comprises a circular gas cylinder body, a threaded cylinder mouth formed in one side end of the circular gas cylinder body, a metal sealing end threadedly connected to the threaded cylinder mouth, a threaded through hole formed in the metal sealing end, a drainage connector threadedly connected to the threaded through hole, a drainage pipe connected to the drainage connector and extending into the circular gas cylinder body, a drainage valve mounted on the side of the drainage connector away from the threaded cylinder mouth, and a drainage pipe in communication with the side of the drainage connector close to the threaded cylinder mouth, wherein the drainage pipe extends to the bottom end inside the circular gas cylinder body. The metal sealing end is further provided with a gas cylinder inlet hole, a gas cylinder outlet hole and a detection interface.
2. An integrated drain port type cylinder end device according to claim 1, characterized in that, The two side ends of the circular gas cylinder are formed by die casting or casting.
3. An integrated drain port type cylinder end device according to claim 1, wherein The material of the circular gas cylinder body is plastic or nylon.
4. An integrated drain port type cylinder end device according to claim 1, wherein The drainage connector is a middle adapter made of stainless steel.
5. An integrated drain port type cylinder end device according to claim 1, wherein The drainage pipe is a hollow hose made of silica gel or rubber.
6. An integrated drain port type cylinder end device according to claim 1, wherein The circular gas cylinder body comprises a fiber resin shell as an outer layer and an inner container inside the shell, and the inner container is provided with the threaded cylinder mouth at one side end.
7. An integrated drain port type cylinder end device according to claim 1, wherein The fiber resin shell is provided with an end protection sleeve on both sides of the inner container.
8. An integrated drain port cylinder valve assembly according to claim 7, wherein, The threaded cylinder mouth is provided with a sealing ring.
9. An integrated drain port cylinder valve assembly as defined in claim 7, wherein,