A high-strength high-toughness steel cylinder suitable for containing high-pressure industrial gas

Abstract

The application provides a high-strength and high-toughness steel cylinder suitable for containing high-pressure industrial gas, which comprises a steel cylinder body and a sealing valve, wherein the steel cylinder body comprises a cylinder body and a mouth section arranged at the end of the cylinder body, a nozzle is arranged on the mouth section, and the inner surface and the outer surface of the nozzle are both provided with a threaded structure; an annular connecting groove is arranged at the bottom of the sealing valve, threaded structures are arranged on the inner and outer sidewalls of the annular connecting groove, and the nozzle is threadedly sealed in the annular connecting groove; an arc-shaped cover is arranged at the bottom edge of the sealing valve and tightly abuts against the outer surface of the mouth section. The high-strength and high-toughness steel cylinder suitable for containing high-pressure industrial gas has high pressure resistance, can maintain a stable sealing state even in a high-pressure environment, greatly reduces the risk of gas leakage, and improves the safety in use.

Description

Technical Field

[0001] This invention relates to the field of pressure vessel technology, and in particular to a high-strength, high-toughness steel cylinder suitable for containing high-pressure industrial gases. Background Technology

[0002] In the field of industrial gas storage and transportation, steel cylinders, as commonly used pressure vessels, are of paramount importance in terms of performance and safety. While traditional steel cylinder designs have been continuously optimized in terms of material selection and manufacturing processes, some problems still exist in practical applications, particularly inadequate sealing performance at the cylinder neck. When steel cylinders are used to store high-pressure industrial gases, poor sealing at the neck often leads to gas leakage. This not only affects the normal storage and use of the gas but may also cause safety accidents, resulting in damage to personnel and equipment.

[0003] Therefore, in view of the insufficient sealing performance of traditional steel cylinders, which leads to insufficient overall pressure bearing capacity of the cylinders, this invention aims to provide a new type of high-strength and high-toughness steel cylinder to solve the leakage problem in the storage and transportation of high-pressure gases and improve the safety and reliability of industrial gas use. Summary of the Invention

[0004] The purpose of this invention is to provide a high-strength and high-toughness steel cylinder suitable for containing high-pressure industrial gases, in order to solve the technical problem that the insufficient sealing performance of the traditional steel cylinder mouth leads to insufficient overall pressure bearing capacity of the steel cylinder.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a high-strength, high-toughness steel cylinder suitable for containing high-pressure industrial gases, wherein the high-strength, high-toughness steel cylinder suitable for containing high-pressure industrial gases comprises: The cylinder body includes a cylinder body and a bottle mouth section disposed at the end of the cylinder body. A bottle mouth section is provided with a bottle spout, and both the inner and outer surfaces of the bottle spout are provided with threaded structures. A sealing valve is provided with an annular connecting groove at the bottom of the sealing valve. The inner and outer walls of the annular connecting groove are provided with threaded structures, and the bottle mouth is threadedly sealed and fitted into the annular connecting groove. An arc-shaped cover is provided at the bottom edge of the sealing valve, and the arc-shaped cover is in close contact with the outer surface of the bottle mouth section.

[0006] In one embodiment, the sealing valve includes: The valve body has a valve cavity inside, the bottom of which is connected to the interior of the main body of the gas cylinder. A connecting hole is provided on the side of the valve body, which is connected to the valve cavity. The annular connecting groove and the arc-shaped cover are both provided on the valve body. A valve stem, which is threaded onto the valve body; A valve core, which is slidably fitted within the valve cavity of the valve body, with one end of the valve core hinged to the valve stem; A conical sealing block is disposed on the valve core, with the large end of the conical sealing block facing the main body of the gas cylinder; A sealing ring is disposed inside the valve cavity, and a tapered hole adapted to the tapered sealing block is provided in the middle of the sealing ring, and the valve core is located inside the tapered hole; When the valve stem is rotated and locked, the valve stem lifts the valve core and the conical sealing block until the conical sealing block fits into the conical hole of the sealing ring.

[0007] In one embodiment, the tapered sealing block or the sealing ring is made of an elastic material.

[0008] In one embodiment, a sealing step is provided inside the valve cavity, and a through hole is provided in the middle of the sealing step. The diameter of the through hole is larger than the diameter of the valve core. The bottom of the valve core passes through the through hole, and an elastic sealing sheet is provided at the bottom of the valve core. The area of ​​the elastic sealing sheet is larger than the cross-sectional area of ​​the through hole. When the valve stem is rotated and locked, the elastic sealing sheet is tightly attached to the sealing step and covers the through hole.

[0009] In one embodiment, the elastic sealing sheet is a curved surface structure with its center recessed towards the main body of the gas cylinder, and the valve core is connected to the center of the elastic sealing sheet.

[0010] In one embodiment, an annular groove is provided between the end of the bottle nozzle and the annular connecting groove, and an elastic hollow sealing ring is provided in the annular groove.

[0011] In one embodiment, a hydraulic seal is further included, the hydraulic seal comprising: A first connecting rod, one end of which is hinged to the valve core; A hydraulic passage is provided in the valve body, and one end of the hydraulic passage is connected to the elastic hollow sealing ring; The second link, one end of which is hinged to the other end of the first link; A slider is disposed within the hydraulic channel, and one end of the slider is connected to the second connecting rod; A piston that slides within a hydraulic channel, the hydraulic channel between the piston and the elastic hollow seal ring being filled with hydraulic oil; An elastic element is disposed between the piston and the slider.

[0012] In one embodiment, the connecting hole of the valve body is provided with an internal thread.

[0013] In one embodiment, a rotating wheel is provided at the top of the valve stem, and a sealing ring is provided at the position where the valve stem mates with the valve body.

[0014] In one embodiment, the cylinder body is made of high-strength and high-toughness material through plate-type bottom and mouth forming and tempering heat treatment spray quenching method to ensure that the wall thickness of the cylinder body is uniform and to eliminate the internal stress of the cylinder body.

[0015] The above-described technical solutions in the embodiments of the present invention have at least the following technical effects or advantages: The high-strength, high-toughness steel cylinder provided in this invention, suitable for containing high-pressure industrial gases, features threaded structures on both the inner and outer surfaces of the nozzle, and an annular connecting groove at the bottom of the sealing valve. The nozzle threads are sealed into this groove, allowing for a tighter threaded connection between the inner and outer surfaces of the nozzle and the sealing valve. This improves the sealing performance and stability of the connection, effectively enhancing the seal at the cylinder opening. Furthermore, an arc-shaped cover is installed at the bottom of the sealing valve, closely fitting the outer surface of the cylinder opening. This arc-shaped cover not only improves the stability and sealing of the connection between the cylinder body and the sealing valve but also protects the cylinder opening. Under high pressure, the arc-shaped cover reinforces the cylinder, preventing deformation and breakage of the opening due to high pressure. This improves the cylinder's pressure resistance, ensuring a stable seal even under high pressure, significantly reducing the risk of gas leakage and enhancing safety. Ultimately, this makes the cylinder suitable for containing high-pressure gases. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a high-strength, high-toughness steel cylinder suitable for containing high-pressure industrial gases, provided in an embodiment of the present invention. Figure 2 A cross-sectional view of the bottle neck section and the sealing valve provided in an embodiment of the present invention; Figure 3 for Figure 2 A magnified view of a portion of point A in the middle; Figure 4 for Figure 3 A schematic diagram of the structure of the sealing valve in the closed state; Figure 5 for Figure 4 A magnified view of a portion of point B in the middle.

[0018] The labels for the various figures are as follows: 1. Cylinder body; 2. Sealing valve; 3. Elastic hollow sealing ring; 11. Bottle neck section; 21. Valve body; 22. Valve stem; 23. Valve core; 24. Conical sealing block; 25. Sealing ring; 26. Elastic sealing sheet; 27. Sealing step; 28. Hydraulic sealing part; 111. Bottle nozzle; 211. Arc-shaped cover; 212. Connecting hole; 213. Valve cavity; 221. Rotary wheel; 281. First connecting rod; 282. Hydraulic channel; 283. Second connecting rod; 284. Slider; 285. Piston; 286. Elastic element. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] Please see Figures 1 to 2 This application provides a high-strength, high-toughness steel cylinder suitable for containing high-pressure industrial gases, including a cylinder body 1 and a sealing valve 2. The cylinder body 1 includes a cylinder body and a bottle mouth section 11 located at the end of the cylinder body. A bottle mouth section 11 is provided with a bottle nozzle 111, and both the inner and outer surfaces of the bottle nozzle 111 are provided with threaded structures. The bottom of the sealing valve 2 is provided with an annular connecting groove, and both the inner and outer walls of the annular connecting groove are provided with threaded structures. The bottle nozzle 111 is threadedly sealed and fitted into the annular connecting groove. An arc-shaped cover 211 (which can be made of high-strength steel) is provided at the bottom edge of the sealing valve 2, and the arc-shaped cover 211 is in close contact with the outer surface of the bottle mouth section 11.

[0024] During assembly, align the annular connecting groove of the sealing valve 2 with the bottle mouth 111, then rotate the sealing valve 2 so that the threaded structure in the annular connecting groove engages with the threaded structure on the bottle mouth 111 until the arc-shaped cover 211 is tightly attached to the bottle mouth section 11.

[0025] The high-strength, high-toughness steel cylinder provided in this embodiment is suitable for containing high-pressure industrial gases. By providing threaded structures on both the inner and outer surfaces of the nozzle 111 and an annular connecting groove at the bottom of the sealing valve 2, the nozzle 111 is threadedly fitted into the annular connecting groove. This allows both the inner and outer surfaces of the nozzle 111 to be threadedly connected to the sealing valve 2, improving the tightness and stability of the connection and effectively enhancing the sealing effect at the bottle mouth. Furthermore, by providing an arc-shaped cover 211 at the bottom of the sealing valve 2 and placing it tightly against the outer surface of the bottle mouth section 11, the arc-shaped cover 211 not only improves the stability and sealing of the connection between the cylinder body 1 and the sealing valve 2, but also protects the bottle mouth section 11 of the cylinder body 1. When the cylinder is under high pressure, the arc-shaped cover 211 provides reinforcement, preventing the bottle mouth section 11 from deforming and cracking due to high pressure, thus improving the pressure resistance of the cylinder. This ensures that the cylinder maintains a stable seal even under high pressure, greatly reducing the risk of gas leakage and improving safety in use.

[0026] In addition, since the arc-shaped cover 211 is set close to the bottle mouth section 11, when the cylinder is in a vibrating environment (such as the vibration generated by the operation of surrounding equipment), the arc-shaped cover 211 can evenly transmit the vibration force to the cylinder, so that the connection between the sealing valve 2 and the cylinder is stable, reducing the risk of loosening or even cracking at the threaded connection between the bottle mouth 111 and the sealing valve 2 due to vibration.

[0027] In one embodiment, the sealing valve 2 includes a valve body 21, a valve stem 22, a valve core 23, a conical sealing block 24, and a sealing ring 25. The valve body 21 has a valve cavity 213 inside, the bottom of which communicates with the interior of the cylinder body 1. A connecting hole 212 is provided on the side of the valve body 21, communicating with the valve cavity 213. An annular connecting groove and an arc-shaped cover 211 are both provided on the valve body 21. The valve stem 22 is threaded onto the valve body 21. The valve core 23 is slidably fitted onto the valve body 21. Inside the valve cavity 213, one end of the valve core 23 is hinged to the valve stem 22; a conical sealing block 24 is disposed on the valve core 23, with the large end of the conical sealing block 24 facing the cylinder body 1; a sealing ring 25 is disposed inside the valve cavity 213, with a conical hole in the middle of the sealing ring 25 that matches the conical sealing block 24, and the valve core 23 is located inside the conical hole; when the valve stem 22 is rotated and locked, the valve stem 22 lifts the valve core 23 and the conical sealing block 24 until the conical sealing block 24 fits into the conical hole of the sealing ring 25.

[0028] When the sealing valve 2 needs to be closed, simply rotate the valve stem 22, causing the valve core 23 hinged to the valve stem 22 to move upwards (away from the main body 1 of the gas cylinder), thereby causing the conical sealing block 24 to move upwards until the conical surface of the conical sealing block 24 is in close contact with the conical hole of the sealing ring 25 (e.g., Figure 4 As shown), this achieves the sealing of valve chamber 213 (closing sealing valve 2), preventing gas in cylinder body 1 from escaping from connection hole 212 of sealing valve 2.

[0029] Compared to traditional sealing structures (such as designing the conical sealing block 24 as a flat plate and the sealing ring 25 as a cylindrical shape, with the flat sealing block sealing the central hole of the cylindrical sealing ring 25), the conical sealing structure between the conical sealing block 24 and the sealing ring 25 in this embodiment not only increases the sealing area to improve sealing performance, but also, because the large end of the conical sealing block 24 faces the cylinder body 1, when the conical sealing block 24 and the sealing ring 25 are in close contact, the strong gas pressure inside the cylinder will act on the conical sealing block 24 through the valve cavity 213. Furthermore, the upward pressure of the gas causes the conical sealing block 24 to experience upward pressure. Under this pressure, the fit between the conical sealing block 24 and the sealing ring 25 becomes tighter, thereby improving the sealing performance between them. Furthermore, the higher the gas pressure inside the cylinder, the greater the gas pressure acting on the conical sealing block 24, resulting in a better seal between the conical sealing block 24 and the sealing ring 25. This ensures that even under high pressure, the conical sealing block 24 and the sealing ring 25 maintain a high and stable sealing performance. Therefore, the sealing method of the conical sealing block 24 and the sealing ring 25 in this embodiment has a simple structure, a stable and reliable sealing effect, and its sealing performance increases with the gas pressure inside the cylinder body 1, ensuring a good and stable sealing effect even under high pressure.

[0030] In one embodiment, the conical sealing block 24 or sealing ring 25 is made of an elastic material. Specifically, the elastic material can be polyurethane or composite rubber, etc. When the sealing valve 2 is in the closed state, the locking force applied by the valve stem 22 can cause the conical sealing block 24 or sealing ring 25 to undergo elastic deformation, ensuring a tight fit between the conical sealing block 24 and the sealing ring 25, thereby improving the sealing performance of the sealing valve 2.

[0031] like Figure 3-4 As shown, in one embodiment, a sealing step 27 is provided inside the valve cavity 213, and a through hole is provided in the middle of the sealing step 27. The diameter of the through hole is larger than the diameter of the valve core 23. The bottom of the valve core 23 passes through the through hole, and an elastic sealing sheet 26 is provided at the bottom of the valve core 23. The area of ​​the elastic sealing sheet 26 is larger than the cross-sectional area of ​​the through hole. When the valve stem 22 is rotated and locked, the elastic sealing sheet 26 is tightly attached to the sealing step 27 and covers the through hole. During the closing process of the sealing valve 2, the air pressure in the valve cavity 213 above the elastic sealing sheet 26 gradually decreases, while the air pressure in the valve cavity 213 below the elastic sealing sheet 26 (i.e., the air pressure inside the main body of the gas cylinder 1) remains basically unchanged. This results in a pressure difference between the upper and lower surfaces of the elastic sealing sheet 26. Under the action of this pressure difference, the elastic sealing sheet 26 is pressed tightly against the sealing step 27 (the elastic sealing sheet 26 is similar to a suction cup adhering to the sealing step 27), thereby sealing the annular gap between the through hole and the valve core 23 and blocking the valve cavity 213. Together with the sealing structure of the conical sealing block 24 and the sealing ring 25, a double seal is formed to ensure the sealing effect of the sealing valve 2.

[0032] Specifically, the elastic sealing sheet 26 is a curved surface structure with its center recessed towards the main body 1 of the gas cylinder, and the valve core 23 is connected to the center of the elastic sealing sheet 26. When subjected to upward air pressure, the curved elastic sealing sheet 26 can fit precisely onto the sealing step 27 to ensure the sealing effect of the elastic sealing sheet 26.

[0033] To ensure the sealing performance between the sealing valve 2 and the cylinder body 1, in one embodiment, an annular groove is provided between the end of the nozzle 111 and the annular connecting groove, and an elastic hollow sealing ring 3 is provided in the annular groove. The elastic hollow sealing ring 3 can be made of rubber. The upper surface of the elastic hollow sealing ring 3 is in close contact with the valve body 21, and the lower surface is in close contact with the end of the nozzle 111, thereby ensuring the sealing performance between the sealing valve 2 and the cylinder body 1.

[0034] like Figure 3-5As shown, in one embodiment, a hydraulic sealing part 28 is further included. The hydraulic sealing part 28 includes: a first connecting rod 281, a hydraulic channel 282, a second connecting rod 283, a slider 284, a piston 285, and an elastic element 286. One end of the first connecting rod 281 is hinged to the valve core 23. The hydraulic channel 282 is disposed in the valve body 21, and one end of the hydraulic channel 282 communicates with the elastic hollow sealing ring 3. One end of the second connecting rod 283 is hinged to the other end of the first connecting rod 281. The slider 284 is disposed in the hydraulic channel 282, and one end of the slider 284 is connected to the second connecting rod 283. The piston 285 is slidably fitted in the hydraulic channel 282, and the hydraulic channel 282 between the piston 285 and the elastic hollow sealing ring 3 is filled with hydraulic oil. The elastic element 286 is disposed between the piston 285 and the slider 284.

[0035] During the closing process of the sealing valve 2, the valve stem 22 lifts the valve core 23 upward. The upward movement of the valve core 23 drives the second connecting rod 283 and the slider 284 to slide outward through the first connecting rod 281. While the slider 284 slides, it compresses the elastic element 286, thereby causing the elastic element 286 to give the piston 285 a greater elastic force (the direction of this elastic force is outward). This causes the piston 285 to move and press more hydraulic oil in the hydraulic channel 282 into the elastic hollow sealing ring 3, causing the elastic hollow sealing ring 3 to expand outward. This ensures that the elastic hollow sealing ring 3 is tightly attached to the valve body 21 and the bottle mouth 111, thereby improving the sealing performance between the cylinder body 1 and the sealing valve 2.

[0036] In one embodiment, the valve body 21 has an internal thread in the connection hole 212. The internal thread in the connection hole 212 facilitates a sealing connection between the external pipe and the seal, improving the ease of use of the gas cylinder.

[0037] In one embodiment, a rotary wheel 221 is provided at the top of the valve stem 22, and a sealing ring is provided at the mating position between the valve stem 22 and the valve body 21. By providing the rotary wheel 221, it is easier to open and close the sealing valve 2, thus facilitating the opening and closing operation of the sealing valve 2.

[0038] In one embodiment, the cylinder body 1 is made of high-strength and high-toughness material through plate-type bottom and mouth forming and tempering heat treatment spray quenching method to ensure that the wall thickness of the cylinder body 1 is uniform and to eliminate the internal stress of the cylinder body 1.

[0039] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-strength, high-toughness steel cylinder suitable for containing high-pressure industrial gases, characterized in that, The high-strength, high-toughness steel cylinders suitable for containing high-pressure industrial gases include: The cylinder body includes a cylinder body and a bottle mouth section disposed at the end of the cylinder body. A bottle mouth section is provided with a bottle spout, and both the inner and outer surfaces of the bottle spout are provided with threaded structures. A sealing valve is provided at the bottom of the sealing valve, and threaded structures are provided on both the inner and outer walls of the annular connecting groove. The bottle mouth is threadedly sealed and fitted into the annular connecting groove. An arc-shaped cover is provided at the bottom edge of the sealing valve, and the arc-shaped cover is in close contact with the outer surface of the bottle mouth section. The sealing valve includes: The valve body has a valve cavity inside, the bottom of which is connected to the interior of the main body of the gas cylinder. A connecting hole is provided on the side of the valve body, which is connected to the valve cavity. The annular connecting groove and the arc-shaped cover are both provided on the valve body. A valve stem, which is threaded onto the valve body; A valve core, which is slidably fitted within the valve cavity of the valve body, with one end of the valve core hinged to the valve stem; A conical sealing block is disposed on the valve core, with the large end of the conical sealing block facing the main body of the gas cylinder; A sealing ring is disposed inside the valve cavity, and a tapered hole adapted to the tapered sealing block is provided in the middle of the sealing ring, and the valve core is located inside the tapered hole; When the valve stem is rotated and locked, the valve stem lifts the valve core and the conical sealing block until the conical sealing block fits into the conical hole of the sealing ring; The valve cavity is provided with a sealing step, and a through hole is provided in the middle of the sealing step. The diameter of the through hole is larger than the diameter of the valve core. The bottom of the valve core passes through the through hole, and an elastic sealing sheet is provided at the bottom of the valve core. The area of ​​the elastic sealing sheet is larger than the cross-sectional area of ​​the through hole. When the valve stem is rotated and locked, the elastic sealing sheet is tightly attached to the sealing step and covers the through hole. The elastic sealing sheet is a curved surface structure with its center recessed towards the main body of the gas cylinder, and the valve core is connected to the center of the elastic sealing sheet; An annular groove is provided between the end of the bottle nozzle and the annular connecting groove, and an elastic hollow sealing ring is provided in the annular groove. It also includes a hydraulic seal, which comprises: A first connecting rod, one end of which is hinged to the valve core; A hydraulic passage is provided in the valve body, and one end of the hydraulic passage is connected to the elastic hollow sealing ring; The second link, one end of which is hinged to the other end of the first link; A slider is disposed within the hydraulic channel, and one end of the slider is connected to the second connecting rod; A piston that slides within a hydraulic channel, the hydraulic channel between the piston and the elastic hollow seal ring being filled with hydraulic oil; An elastic element is disposed between the piston and the slider.

2. The high-strength, high-toughness steel cylinder suitable for containing high-pressure industrial gases according to claim 1, characterized in that: The conical sealing block or the sealing ring is made of an elastic material.

3. A high-strength, high-toughness steel cylinder suitable for containing high-pressure industrial gases according to claim 1, characterized in that: The valve body has an internal thread inside the connecting hole.

4. A high-strength, high-toughness steel cylinder suitable for containing high-pressure industrial gases according to claim 1, characterized in that: A rotating wheel is provided at the top of the valve stem, and a sealing ring is provided at the position where the valve stem mates with the valve body.

5. A high-strength, high-toughness steel cylinder suitable for containing high-pressure industrial gases according to claim 1, characterized in that: The main body of the cylinder is made of high-strength and high-toughness material, formed by plate bottom and mouth shaping and tempering heat treatment by spray quenching, to ensure that the wall thickness of the main body of the cylinder is uniform and to eliminate the internal stress of the main body of the cylinder.

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