T-shaped hot plug nut sealing water drainage structure for composite material air cylinder

Abstract

The utility model is applicable to the technical field of composite material pressure vessel structure sealing components, and particularly relates to a T-shaped hot plug nut sealing water drainage structure for a composite material air reservoir, which comprises an air reservoir, a water drainage hole is arranged on the surface of the air reservoir, and a preset water drainage head is arranged on the surface of the air reservoir. One end of the preset drainage head is connected with a threaded connector, and one end of the threaded connector is provided with a hot plug nut. According to the T-shaped hot plug nut sealing water drainage structure for the composite material air cylinder, the water drainage function can be achieved on the premise that the opening size of the air cylinder is not increased, the overall sealing performance and pressure resistance are improved, the safety and reliability of system operation are enhanced, and the service life of the system is prolonged. The sealing structure is particularly suitable for application scenes with high requirements on sealing and structural strength in a high-pressure heavy vehicle brake gas storage system.

Description

Technical Field

[0001] This utility model relates to the technical field of sealing components for composite pressure vessel structures, specifically a T-shaped hot-plug nut sealing and draining structure for composite gas storage cylinders. Background Technology

[0002] Currently, composite material gas cylinders are widely used in commercial heavy-duty vehicles, rail transportation, and high-pressure gas storage and transportation systems. Especially in applications requiring reduced vehicle weight and improved corrosion resistance, composite material gas cylinders are gradually replacing traditional metal gas storage devices. During actual operation, because the braking system operates under high pressure and high frequency for extended periods, water vapor carried in the compressed air easily condenses inside the gas cylinder due to temperature changes. If not drained promptly, this can lead to internal wall corrosion and the accumulation of gas impurities, ultimately affecting system operational safety. Therefore, the industry generally includes a drain structure at the bottom of the gas cylinder to facilitate periodic drainage and maintain the stability of the gas storage system.

[0003] To achieve drainage, existing technologies typically employ a combination of a hot-plug metal nut and a drain valve. The metal nut is heated and embedded into the inner liner of the composite gas storage cylinder, with a standard threaded interface for installing the drain valve. However, in high-pressure gas storage environments, to meet sealing and strength requirements, traditional hot-plug nuts usually have a large outer diameter. This necessitates creating large-diameter through holes in the cylinder, which can easily lead to stress concentration in composite structures, disrupt fiber continuity, and reduce the overall pressure resistance of the gas storage cylinder. Furthermore, some hot-plug structures are not optimized for sealing characteristics, resulting in leaks at the interface or seal aging leading to failure. In severe cases, this can cause a decline in the performance of the gas storage system or even a safety accident. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a T-type hot-plug nut sealing and water-draining structure for composite material air storage cylinders, aiming to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A T-shaped hot-plug nut sealing and drainage structure for a composite material air storage cylinder includes an air storage cylinder with a drainage hole on its surface. A preset drainage head is provided on the surface of the air storage cylinder, and one end of the preset drainage head is connected to a threaded joint. A hot-plug nut is provided at one end of the threaded joint, and a second through hole is provided at one end of the hot-plug nut. A first through hole is provided at one end of the preset drainage head, and the hot-plug nut passes through the interior of the first through hole.

[0007] A leakage water collection ring is fitted around the outside of the preset drain head, and a liquid sensor is installed inside the leakage water collection ring.

[0008] Furthermore, the two ends of the second through hole are respectively connected to the interior of the drain hole and the interior of the threaded joint.

[0009] Furthermore, the surface of the preset drain head is provided with a first sealing groove and a second sealing groove, the outer side of the hot-plug nut is fitted with a first sealing ring, and the surface of the threaded joint is provided with a second sealing ring.

[0010] Furthermore, the leakage water collection ring is sleeved around the connection between the threaded joint and the preset drain head.

[0011] Furthermore, the inner diameter of the bottom region of the leakage water collection ring is adapted to the outer diameter of the top region of the preset drain head, and the leakage water collection ring is made of an elastic material.

[0012] Furthermore, the surface of the preset drain head is provided with a positioning block, which is used to define the position of the leakage water collection ring.

[0013] This utility model provides a T-type hot-plug nut sealing and draining structure for composite material gas storage cylinders, which has the following features:

[0014] Beneficial effects:

[0015] This utility model provides a T-shaped hot-plug nut sealing and drainage structure for composite material air storage cylinders. It can not only achieve drainage function without increasing the opening size of the air storage cylinder, but also improve the overall sealing and pressure resistance, and enhance the safety and reliability of system operation. It is especially suitable for application scenarios with high requirements for sealing and structural strength in high-pressure heavy vehicle braking air storage systems. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a T-shaped hot-plug nut sealing and water-draining structure for a composite material gas storage cylinder.

[0017] Figure 2 This is a schematic diagram of the structure of an air storage cylinder in a T-shaped hot-plug nut sealing and draining structure used in composite material air storage cylinders.

[0018] Figure 3 This is a front view of a T-shaped hot-plug nut sealing and draining structure for a composite material gas cylinder, showing the threaded joint and the preset drain head in a separated state.

[0019] Figure 4 This is a schematic diagram of an overhead structure in which the threaded joint and the preset drain head are separated in a T-shaped hot-plug nut sealing and draining structure for a composite material air storage cylinder.

[0020] Figure 5This is a front sectional view of the threaded joint and the preset drain head in a T-type hot-plug nut sealing and draining structure for a composite material air tank.

[0021] Figure 6 This is a front sectional view of a threaded joint, a pre-set drain head, and a leakage water collection ring in a T-type hot-plug nut sealing and draining structure for a composite material gas storage cylinder.

[0022] In the diagram: 1. Gas storage tank; 2. Pre-set drain head; 3. Threaded connector; 4. Drain hole; 5. First sealing ring; 6. Hot-plug nut; 7. First sealing groove; 8. Second sealing groove; 9. First through hole; 10. Second sealing ring; 11. Second through hole; 12. Leakage water collection ring; 13. Liquid sensor; 14. Positioning block. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0025] like Figures 1-5 As shown in the figure, the present invention provides a T-shaped hot-plug nut sealing and draining structure for a composite material air storage cylinder, including an air storage cylinder 1, and a drain hole 4 is provided on the surface of the air storage cylinder 1. A preset drain head 2 is provided on the surface of the air storage cylinder 1, and a threaded connector 3 is connected to one end of the preset drain head 2. A hot-plug nut 6 is provided at one end of the threaded connector 3, and a second through hole 11 is provided at one end of the hot-plug nut 6. The two ends of the second through hole 11 are respectively connected to the interior of the drain hole 4 and the interior of the threaded connector 3.

[0026] One end of the pre-set drain head 2 has a first through hole 9, and the hot-plug nut 6 passes through the first through hole 9. The surface of the pre-set drain head 2 has a first sealing groove 7 and a second sealing groove 8. A first sealing ring 5 is sleeved on the outside of the hot-plug nut 6, and a second sealing ring 10 is provided on the surface of the threaded joint 3.

[0027] In one embodiment of this utility model, the gas storage cylinder 1 is made of composite material, and the pre-installed drain head 2 is an integrally formed structure with the gas storage cylinder 1, and the whole is made of the same composite material to ensure the consistency of the mechanical properties and sealing performance of the hot-plug connection parts. The drain hole 4 is located at the bottom of the gas storage cylinder 1 to ensure that condensate can be discharged smoothly. The pre-installed drain head 2 serves as the connection base for the drainage passage, and one end of it is connected to the threaded joint 3, and mechanical connection and sealing fixation are achieved by the hot-plug nut 6.

[0028] The hot-plug nut 6 has a T-shaped structure and is inserted into the first through hole 9 of the pre-set drain head 2, with one end of the hot-plug nut 6 extending into the air storage cylinder 1. One end of the hot-plug nut 6 has a second through hole 11, which communicates with the interior of the drain hole 4, while the other end communicates with the interior of the threaded joint 3, thus forming a complete drainage channel. Through this design, the hot-plug nut 6, while ensuring structural connection, can minimize the diameter of its installation opening on the air storage cylinder 1. Compared to the large hot-plug nut structures in the prior art, its outer diameter is significantly reduced, effectively improving the pressure resistance of the air storage cylinder 1 above 6 MPa.

[0029] The outer surface of the pre-installed drain head 2 is provided with a first sealing groove 7 and a second sealing groove 8, which are used to accommodate a first sealing ring 5 and a second sealing ring 10, respectively. The first sealing ring 5 is sleeved on the outside of the hot-plug nut 6 and embedded in the first sealing groove 7; the second sealing ring 10 is set on the surface of the threaded joint 3 and cooperates with the second sealing groove 8. In actual use, the two sealing rings work together to form a double seal at the end face and the chamfer area, further improving the overall sealing effect and sealing reliability, and preventing gas leakage or condensate leakage.

[0030] In addition, the hot-plug nut 6 has a double-layer knurled structure with opposite rotation on its outer side to enhance its pull-out force and breaking torque in the inserted state, thereby improving the connection strength between it and the preset drain head 2. This knurled structure not only increases the frictional contact area but also effectively prevents loosening caused by thermal expansion and contraction or vibration, ensuring the long-term stability of the structure. The sealing ring is preferably made of high-temperature and high-pressure resistant rubber to ensure good sealing performance under high-temperature or high-pressure conditions.

[0031] Through the above structural design, the present invention provides a T-shaped hot-plug nut sealing and drainage structure for composite material air storage cylinders, which not only achieves drainage function without increasing the opening size of air storage cylinder 1, but also improves the overall sealing and pressure resistance, and enhances the safety and reliability of system operation. It is especially suitable for application scenarios with high requirements for sealing and structural strength in high-pressure heavy vehicle braking air storage systems.

[0032] like Figure 6 As shown, in one embodiment of this utility model, a leakage water collection ring 12 is sleeved on the outer side of the preset drain head 2, and a liquid sensor 13 is installed inside the leakage water collection ring 12. The leakage water collection ring 12 is sleeved around the connection between the threaded joint 3 and the preset drain head 2.

[0033] The inner diameter of the bottom region of the leakage water collection ring 12 is adapted to the outer diameter of the top region of the preset drain head 2, and the leakage water collection ring 12 is made of elastic material.

[0034] In this embodiment, a leakage water collection ring 12 is fitted around the outside of the preset drain head 2. The leakage water collection ring 12 is installed around the connection between the threaded joint 3 and the preset drain head 2, covering the area where leakage may occur, and is used to collect and monitor leakage water. The inner diameter of the bottom area of ​​the leakage water collection ring 12 is adapted to the outer diameter of the top area of ​​the preset drain head 2, forming a fitted structure, which can stably fix it in the target position without affecting the normal operation of the hot-plug nut 6. The leakage water collection ring 12 is made of flexible elastic material, which can be slightly deformed during installation to fit tightly to the fitted part, ensuring that when a small leak occurs in the connection, the liquid can be guided to the internal sensing area in time by the collection ring.

[0035] A liquid sensor 13 is installed inside the leakage water collection ring 12 to detect the accumulation of liquid within the ring in real time. When leakage or a small amount of water leaks at the connection between the threaded joint 3 and the preset drain head 2, the liquid is first collected by the leakage water collection ring 12. Subsequently, the liquid sensor 13 feeds back the detected liquid signal to the control system, thereby achieving real-time monitoring of the leakage at the connection. This design, through the combination of physical collection and electronic sensing, effectively avoids the risk of long-term undetected leakage, improving the operational safety and maintainability of the system.

[0036] By cooperating with the leakage water collection ring 12 and the liquid sensor 13, continuous monitoring of the sealing status at the connection between the threaded joint 3 and the preset drain head 2 can be achieved. Leakage can be detected immediately when the sealing performance deteriorates due to vibration, impact, or long-term high pressure. This structural design integrates the monitoring function without requiring additional openings or structural changes to the main body of the gas storage tank 1. It boasts advantages such as compact structure, easy installation, and strong adaptability, making it particularly suitable for gas storage systems with high safety requirements. It provides early warning information for equipment maintenance, helping to detect potential hazards in advance and implement corrective interventions.

[0037] In this embodiment, a positioning block 14 is provided on the surface of the preset drain head 2. The positioning block 14 is integrally formed on the outer surface of the preset drain head 2 and is located on the installation path of the leakage water collection ring 12. When the leakage water collection ring 12 is sleeved onto the connection between the preset drain head 2 and the threaded connector 3, the positioning block 14 provides a physical limiting function to limit the installation position of the leakage water collection ring 12, preventing it from being displaced or rotated under vibration, impact or external force disturbance, and ensuring that the liquid sensor 13 is always in the position corresponding to the target monitoring area.

[0038] This structural design, by integrating the positioning block 14 with the pre-set drain head 2, not only improves assembly consistency and efficiency but also reduces reliance on additional fasteners or auxiliary mounting parts, thus simplifying the installation process. The presence of the positioning block 14 ensures the leak water collection ring 12 is stably positioned after installation, preventing issues such as uncollected leaks or inaccurate monitoring range of the liquid sensor 13 due to ring misalignment, effectively improving the reliability and practicality of the leak monitoring system.

[0039] By setting a positioning block 14 on the outside of the preset drain head 2, the structural stability and functional accuracy of the leakage water collection ring 12 are further improved, enabling the overall sealing monitoring system to operate in a high-pressure gas storage environment for a long time without interference, and enhancing the service life and safety assurance capability of the structure under complex working conditions.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A T-shaped hot-plug nut sealing and draining structure for a composite material air storage cylinder, comprising an air storage cylinder (1), wherein a drain hole (4) is provided on the surface of the air storage cylinder (1), characterized in that, The surface of the gas storage cylinder (1) is provided with a preset drain head (2), and one end of the preset drain head (2) is connected to a threaded connector (3). One end of the threaded connector (3) is provided with a hot-plug nut (6), and one end of the hot-plug nut (6) is provided with a second through hole (11). One end of the preset drain head (2) is provided with a first through hole (9), and the hot-plug nut (6) is provided through the interior of the first through hole (9). The preset drain head (2) is fitted with a leakage water collection ring (12) on the outside, and a liquid sensor (13) is installed inside the leakage water collection ring (12).

2. The T-type hot-plug nut sealing and draining structure for a composite material gas storage cylinder according to claim 1, characterized in that, The two ends of the second through hole (11) are respectively connected to the interior of the drain hole (4) and the interior of the threaded joint (3).

3. The T-type hot-plug nut sealing and draining structure for a composite material air storage cylinder according to claim 1, characterized in that, The surface of the preset drain head (2) is provided with a first sealing groove (7) and a second sealing groove (8), the outside of the hot plug nut (6) is fitted with a first sealing ring (5), and the surface of the threaded joint (3) is provided with a second sealing ring (10).

4. The T-type hot-plug nut sealing and draining structure for a composite material gas storage cylinder according to claim 1, characterized in that, The leakage water collection ring (12) is sleeved around the connection between the threaded joint (3) and the preset drain head (2).

5. The T-type hot-plug nut sealing and draining structure for a composite material gas storage cylinder according to claim 1, characterized in that, The inner diameter of the bottom region of the leakage water collection ring (12) is adapted to the outer diameter of the top region of the preset drain head (2), and the leakage water collection ring (12) is made of elastic material.

6. The T-type hot-plug nut sealing and draining structure for a composite material gas storage cylinder according to claim 1, characterized in that, The surface of the preset drain head (2) is provided with a positioning block (14), and the positioning block (14) is used to define the position of the leakage water collection ring (12).

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