Built-in flow-driven blowout preventer for gas cylinder

Abstract

The utility model discloses a pressure vessel technical field's a built -in flow drive gas cylinder blowout preventer, the utility model casing and base are connected in casing bottom, the casing is equipped with second gas channel and third gas channel and first through -hole from bottom to top in proper order in, the second gas channel is equipped with the sliding block in the sliding, and the sliding block is the ladder cylindrical shape, and the sliding block bottom is equipped with the middle part gas channel and second through -hole, and the second through -hole is located the upper portion of middle part gas channel and is communicated with each other, and the sliding block top is equipped with the gas channel connecting groove, and the sliding block top is located the below of third gas channel and the gas channel connecting groove is used for intercommunication second through -hole and third gas channel, and the sliding block is equipped with the compression spring, and the compression spring is located the second gas channel, and the base is opened in first gas channel, and first gas channel is communicated with middle part gas channel, the utility model discloses when the gas cylinder is dumped and leaks, mainly through the high -flow gas effect push the sliding block, play the blowout preventer effect, when the use condition is more stable work, can guarantee safety when having gas leakage simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of pressure vessel technology, specifically to a built-in flow-driven gas cylinder anti-blowout device. Background Technology

[0002] High-pressure gas cylinders, as a common type of special equipment, play an indispensable and crucial role in many fields such as modern industrial production, scientific research, and medicine. The gases stored in high-pressure gas cylinders typically possess dangerous characteristics such as high pressure, flammability, explosiveness, and strong oxidizing properties, making cylinder safety a constant focus of attention in related industries. During the entire lifecycle of a gas cylinder, the transportation and usage phases are the most accident-prone periods. Because gas cylinders are mobile pressure vessels with a wide range of movement and complex and variable operating environments, coupled with the fact that some operators have not received professional and systematic training and have weak safety awareness, violations of operating procedures occur frequently. This has led to an increasing trend in gas cylinder-related accidents in recent years, and once they occur, they often result in extremely serious consequences.

[0003] Current high-pressure gas cylinder tipping prevention devices mainly consist of external fixing brackets and cylinder mouth fastening devices. Fixing brackets secure the cylinder with a frame; while modern models feature adjustable structures and anti-slip designs, they are cumbersome to operate, inconvenient to move, and prone to tipping under strong impacts, as well as corrosion. Cylinder mouth fastening devices have evolved from manual to automatic sensor-based shut-off; however, their complex structure, susceptible to sensor interference, and prone to mechanical wear make maintenance difficult and costly. They generally rely on gravity distribution to change the valve core position and block the gas passage, but they are ineffective when the cylinder is slightly tilted but still usable. These factors limit their widespread application.

[0004] Based on this, this utility model designs a built-in flow-driven gas cylinder anti-spray device to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a built-in flow-driven gas cylinder anti-blowout device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a housing and a base, the base being connected to the bottom of the housing; the housing having a second air passage, a third air passage, and a first through hole arranged sequentially from bottom to top; the diameters of the second air passage, the third air passage, and the first through hole decreasing sequentially and arranged in a stepped manner; a slider slidingly disposed within the second air passage; the slider being a stepped cylindrical shape; a central air passage and a second through hole disposed at the bottom of the slider; the second through hole being located above the central air passage and communicating with it; an air passage connecting groove disposed at the top of the slider; the top of the slider being located below the third air passage; the air passage connecting groove being used to connect the second through hole and the third air passage; a compression spring disposed outside the slider; the compression spring being located within the second air passage; and a first air passage disposed within the base, communicating with the central air passage.

[0007] As a further embodiment of this utility model, the bottom of the slider is provided with positioning protrusions around the perimeter, and the housing is provided with positioning grooves. The positioning protrusions are located in the positioning grooves and the two slide in cooperation. The length of the positioning grooves is greater than that of the positioning protrusions.

[0008] As a further embodiment of this utility model, the stepped surface of the slider and the inner top of the second air passage are respectively provided with a lower spring groove and an upper spring groove, and the upper and lower ends of the compression spring are respectively installed in the upper spring groove and the lower spring groove.

[0009] As a further embodiment of this utility model, the second through hole is provided in multiple sets, and a guide cone is provided at the intersection of the second through hole inside the slider. The guide cone is inverted with a smooth tip and is located above the middle air passage.

[0010] As a further embodiment of this utility model, the outer wall of the first through hole is provided with an external thread, the first through hole is fitted with an elastic washer, the base is provided with a connecting thread, and the base is threadedly connected to the housing.

[0011] As a further embodiment of this utility model, the air passage connection groove is provided in multiple sets and is distributed in a cross-shaped circumferential direction on the top of the slider.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. When the gas cylinder tipps over and a large amount of gas leaks out, the slider moves upward, causing the gas passage connection groove to enter the third gas passage. The side wall of the third gas passage blocks the gas passage connection groove, thereby blocking the third and second gas passages and preventing the gas cylinder from spraying out a large amount of gas. This provides good protection when the gas cylinder tipps over and is relatively safe.

[0014] 2. When the gas cylinder shakes or tipps over but does not leak a large amount of gas, the slider will not move upward to the sealing position or will not move at all due to the action of the compression spring. Thus, it can still be used normally under safe conditions. It mainly uses the action of a large flow of gas to push the slider, thereby filtering out more action factors that do not affect the safe use of the gas cylinder, effectively detecting leaking gas, playing a role in preventing spraying, and working relatively stably in use, while ensuring safety in the event of a gas leak.

[0015] 3. After the gas cylinder is uprighted and the leak is sealed, the entire device will be in a vertical position again. The slider will return to its working state under its own weight and the action of the compression spring. At this time, the gas passage connection groove is connected to the second and third gas passages to achieve normal gas supply, and can then be reused. The reset is simple and flexible. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is an exploded view of the overall structure of this utility model;

[0018] Figure 3 This is a half-sectional view of the overall structure of this utility model in upright use;

[0019] Figure 4 This is a half-section diagram of the overall structure of this utility model when tilted.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Elastic washer; 2. Housing; 3. Compression spring; 4. Slider; 5. Base; 6. First through hole; 7. External thread; 8. Third air passage; 9. Upper spring groove; 10. Second air passage; 11. Positioning groove; 12. Lower spring groove; 13. Air passage connecting groove; 14. Second through hole; 15. Guide cone; 16. Positioning protrusion; 17. Connecting thread; 18. First air passage; 19. Middle air passage. Detailed Implementation

[0022] Please see Figure 1-4The technical solution provided by this utility model is as follows: a shell 2 and a base 5, the base 5 being connected to the bottom of the shell 2, the shell 2 having a second air passage 10, a third air passage 8 and a first through hole 6 arranged sequentially from bottom to top, the diameters of the second air passage 10, the third air passage 8 and the first through hole 6 decreasing sequentially and arranged in a stepped manner, a slider 4 being slidably arranged inside the second air passage 10, the slider 4 being a stepped cylindrical shape, the bottom of the slider 4 having a middle air passage 19 and a second through hole 14, the second through hole 14 being located above the middle air passage 19 and the two communicating, the top of the slider 4 having an air passage connecting groove 13, the top of the slider 4 being located below the third air passage 8 and the air passage connecting groove 13 being used to connect the second through hole 14 and the third air passage 8, the slider 4 having a compression spring 3 outer sleeve, the compression spring 3 being located inside the second air passage 10, the base 5 having a first air passage 18, the first air passage 18 communicating with the middle air passage 19.

[0023] The device is assembled onto the gas cylinder valve via the housing 2. When the gas cylinder is used upright, the device is also in an upright position. After the valve is opened, the slider 4 remains in close contact with the base 5 under the weight of the spring 3 and the slider 4. At this time, the gas passage connection groove 13 is located below the third gas passage 8 and the two are connected. The gas passes through the first gas passage 18 of the base 5 and the middle gas passage 19 of the slider 4, and enters the third gas passage 8 through the space between the second through hole 14, the slider 4 and the housing, and then flows through the first through hole 6, thus enabling the normal use of the gas cylinder.

[0024] When the gas cylinder tipps over and a large amount of gas leaks out, the weight of the slider 4 does not fully act on the top of the base 5. The compression spring 3 retracts, and under the impact of the internal gas, the balance of the slider 4 is broken, causing it to move upward. This allows the gas passage connection groove 13 to enter the third gas passage 8. The side wall of the third gas passage 8 blocks the gas passage connection groove 13, thereby blocking the third gas passage 8 and the second gas passage 10, thus preventing the gas cylinder from spraying out a large amount of gas. This provides good protection when the gas cylinder tipps over, making it relatively safe.

[0025] When the gas cylinder shakes or tipps over but does not leak a large amount of gas, the slider 4 will not move upward to the sealing position or will not move at all due to the action of the compression spring 3. Thus, it can still be used normally under safe conditions, filtering out many motion factors that do not affect the safe use of the gas cylinder. It works relatively stably in use, while ensuring safety when there is a gas leak. The specific safe conditions for the amount of gas cylinder tipping over and leaking can be adjusted by the elasticity of the compression spring 3 and the weight of the slider 4 to obtain the best matching conditions, thus making it suitable for many occasions.

[0026] After the gas cylinder is uprighted and the leak is sealed, the entire device is also back in a vertical position. The slider 4 returns to its working state under its own weight and the action of the compression spring 3. At this time, the gas passage connection groove 13 is connected to the second gas passage 10 and the third gas passage 8 to achieve normal gas supply, and can then be reused. The reset is simple and flexible.

[0027] The slider 4 has positioning protrusions 16 around its bottom, and the housing 2 has positioning grooves 11. The positioning protrusions 16 are located in the positioning grooves 11 and the two slide in cooperation. The length of the positioning grooves 11 is greater than that of the positioning protrusions 16. When the slider 4 moves up and down, the positioning protrusions 16 move up and down along the positioning grooves 11, which limits the sliding state of the slider 4 and also prevents the slider 4 from rotating.

[0028] The stepped surface of the slider 4 and the inner top of the second air passage 10 are respectively provided with a lower spring groove 12 and an upper spring groove 9. The upper and lower ends of the compression spring 3 are respectively installed in the upper spring groove 9 and the lower spring groove 12. The overall assembly is relatively simple, which facilitates the installation and replacement of the compression spring 3.

[0029] The second through hole 14 is provided in multiple sets, and a guide cone 15 is provided at the intersection of the second through hole 14 inside the slider 4. The guide cone 15 is inverted with a smooth tip and is located above the middle air passage 19. The guide cone 15 can smoothly guide the airflow to the second through hole 14 on the side wall, reduce the impact of gas on the slider 4 during normal flow, reduce the preload of the compression spring 3, and thus improve the triggering accuracy.

[0030] The outer wall of the first through hole 6 is provided with an external thread 7, the first through hole 6 is fitted with an elastic washer 1, the base 5 is provided with a connecting thread 17, and the base 5 is threadedly connected to the housing 2.

[0031] Adding an elastic washer 1 when installing the valve via the external thread 7 makes the assembly more compact and provides a certain degree of sealing and shock absorption. Meanwhile, the base 5 is connected to the housing via the connecting thread 17, which is simple and convenient, making the overall assembly very straightforward.

[0032] Among them, the air passage connection groove 13 is provided in multiple sets and is distributed in a cross-shaped circumferential direction on the top of the slider 4.

[0033] It can increase the connection area between the third airway 8 and the second airway 10, thereby ensuring the normal flow of gas and avoiding the impact of small gaps on the gas output, thus ensuring the normal gas supply of the gas cylinder.

Claims

1. A built-in flow-driven gas cylinder anti-blowout device, comprising a housing (2) and a base (5), wherein the base (5) is connected to the bottom of the housing (2), characterized in that: The housing (2) is provided with a second air passage (10), a third air passage (8), and a first through hole (6) from bottom to top. The diameters of the second air passage (10), the third air passage (8), and the first through hole (6) decrease sequentially and are arranged in a stepped manner. A slider (4) is slidably provided in the second air passage (10). The slider (4) is a stepped cylinder. The bottom of the slider (4) is provided with a middle air passage (19) and a second through hole (14). The second through hole (14) is located in the middle air passage. (19) Above and connected to each other, the top of the slider (4) is provided with an air passage connecting groove (13), the top of the slider (4) is located below the third air passage (8) and the air passage connecting groove (13) is used to connect the second through hole (14) and the third air passage (8), the slider (4) is covered with a compression spring (3), the compression spring (3) is located in the second air passage (10), the base (5) is provided with a first air passage (18), the first air passage (18) is connected to the middle air passage (19).

2. The built-in flow-driven gas cylinder anti-blowout device according to claim 1, characterized in that: The slider (4) has positioning protrusions (16) around its bottom, and the housing (2) has positioning grooves (11). The positioning protrusions (16) are located in the positioning grooves (11) and the two slide together. The length of the positioning grooves (11) is greater than that of the positioning protrusions (16).

3. The built-in flow-driven gas cylinder anti-blowout device according to claim 1, characterized in that: The stepped surface of the slider (4) and the inner top of the second air passage (10) are respectively provided with a lower spring groove (12) and an upper spring groove (9), and the upper and lower ends of the compression spring (3) are respectively installed in the upper spring groove (9) and the lower spring groove (12).

4. The built-in flow-driven gas cylinder anti-blowout device according to claim 1, characterized in that: The second through hole (14) is provided in multiple sets, and the second through hole (14) is provided with a guide cone (15) at the intersection inside the slider (4). The guide cone (15) is inverted and has a smooth tip and is located above the middle air passage (19).

5. The built-in flow-driven gas cylinder anti-blowout device according to claim 1, characterized in that: The outer wall of the first through hole (6) is provided with an external thread (7), the first through hole (6) is provided with an elastic washer (1), the base (5) is provided with a connecting thread (17), and the base (5) is threadedly connected to the shell (2).

6. The built-in flow-driven gas cylinder anti-blowout device according to claim 1, characterized in that: The airway connection groove (13) is provided in multiple sets and is distributed in a cross-shaped circumferential direction on the top of the slider (4).

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