Built-in cylinder pouring anti-spray device

Abstract

The application discloses a built-in gas cylinder pouring anti-spraying device, which comprises a lower shell and an upper shell, the lower shell and the upper shell are threadedly connected, the upper end of the upper shell is provided with a neck pipe, a plurality of air inlets are axially arranged on the neck pipe, the inside of the upper shell is provided with a piston head, a reset spring is sleeved on each of four threaded shafts, the lower end of the reset spring is connected with a piston plate, the edge of the piston plate is sleeved on the four threaded shafts, the piston plate is connected with the piston head through a connecting rod, and the top end of the piston head is located at the lower part of the air inlets under the action of the reset spring. The built-in anti-spraying device can prevent the high-pressure gas in the gas cylinder from being sprayed out when the gas cylinder is poured, thereby preventing the gas cylinder from flying or exploding, and the gas cylinder can be used at a small angle.

Description

A built-in gas cylinder tilting anti-spray device Technical Field

[0001] This invention belongs to the field of pressure vessel technology, and particularly relates to a built-in gas cylinder tilting prevention device. Background Technology

[0002] Gas cylinders are common special equipment that play a vital role in various fields, such as acetylene and oxygen cylinders used for welding and gas cutting, ammonia cylinders used in chemical production, and anesthetic cylinders containing nitrous oxide. However, due to the high pressure and flammable and explosive gases inside the cylinders, their safety has always been a major concern. The transportation and use of gas cylinders are high-risk periods for dangerous situations. Coupled with improper operation by personnel or sudden events, gas cylinder accidents are becoming increasingly frequent and highly dangerous, easily leading to property damage and even personal injury.

[0003] In our daily lives, there are many serious accidents caused by gas cylinders being accidentally tipped over during transportation or handling, resulting in the valves of the gas cylinders falling off.

[0004] The valve of the gas cylinder ruptured after it fell to the ground, causing the high-pressure gas inside the cylinder to rush out. The huge pressure difference created a huge airflow impact, and the huge reaction force of the airflow acted on the gas cylinder, causing it to swing wildly at extremely high speeds, threatening people's lives.

[0005] When a gas cylinder valve falls off, it not only generates an impact force but can also cause a more serious explosion. If the gas cylinder contains flammable and explosive gases such as acetylene, the acetylene will flow out rapidly after the cylinder is tilted due to the internal pressure and the design of the gas outflow channel. Since the acetylene cylinder contains filler and solvent (acetone), tilting it will cause acetone to flow out with the acetylene, increasing acetone consumption, lowering the combustion temperature, and potentially causing backfire and explosion.

[0006] During normal use and even transportation, gas cylinders are placed upright and equipped with special racks, such as the one with patent application number CN202321584301.4, entitled "A Movable Splicing Gas Cylinder Anti-tipping Rack". This ensures that the cylinders remain upright during normal transportation. However, in the event of an accident such as a car rollover, the gas cylinders may still be severely impacted, causing the high-pressure gas inside to be ejected and the cylinder to fly out, which can easily cause secondary accidents.

[0007] Currently, tipping blowout prevention for gas cylinders only addresses external prevention, such as equipping them with upright frames, installing external outlet fastening devices, and buffer devices. These methods cannot prevent gas from escaping from the inside. While these designs can mitigate hazards from ordinary operational errors, they cannot effectively prevent more violent movements. Addressing blowout prevention from the inside is a crucial and feasible solution to gas cylinder safety issues.

[0008] In patent application CN202321093041.0, entitled "A Built-in Gas Cylinder Tilting Preventive Device," the components include a housing, multiple first through holes circumferentially disposed on the housing, a second through hole at the bottom of the housing, a movable cavity enclosed by the inner wall of the housing, a sphere movably disposed within the movable cavity, a cap fitted over the top of the housing, an elastic seal between the cap and the housing, a first air passage penetrating the cap, and a second air passage penetrating the elastic seal. The second through hole and the multiple first through holes are respectively connected to the movable cavity; the diameter of the second air passage is smaller than the diameter of the sphere. This invention features a simple and compact structure for the cap, elastic seal, sphere, and housing. However, its sensitivity is insufficient, and it cannot function effectively at small tilt angles.

[0009] However, existing technologies have some problems: existing gas cylinders cannot be sealed when tilted, which can easily cause high-pressure gas inside to be ejected, resulting in the gas cylinder flying up or exploding, and they cannot be used at small angles of tilt. Therefore, we propose a built-in gas cylinder tilting anti-spray device. Summary of the Invention

[0010] To address the problems existing in the prior art, the purpose of this invention is to provide a built-in anti-spray device for tilting gas cylinders. By using the built-in anti-spray device, the internal high-pressure gas can be prevented from being ejected when the gas cylinder is tilted, thereby preventing the gas cylinder from flying up or exploding, and it can be used at a small angle of tilt.

[0011] This invention is implemented as follows: a built-in gas cylinder tilting anti-spray device includes a lower housing and an upper housing, which are threadedly connected. A neck tube is fixedly provided at the upper end of the upper housing, and several air inlets are axially opened on the neck tube. A piston head is movably disposed inside the neck tube inside the upper housing. Four through holes are equally spaced on the outer side of the upper housing, and four threaded shafts are inserted through the four through holes. A return spring is sleeved on each of the four threaded shafts. A piston plate is connected to the lower end of the return spring. The edge of the piston plate is movably sleeved on the four threaded shafts. A connecting rod is fixedly installed in the middle of the piston plate. The top end of the connecting rod is fixedly connected to the bottom end of the piston head. The edge of the piston plate is movably and sealingly connected to the inner wall of the upper housing. The edge of the piston head is movably and sealingly connected to the inner wall of the neck tube. Under the action of the return spring, the top end of the piston head is located at the lower part of the several air inlets.

[0012] Furthermore, a first sealing strip is fitted onto the edge of the piston plate, and a second sealing strip is fitted onto the edge of the piston head.

[0013] Furthermore, a connecting threaded post is fixedly provided at the upper end of the lower housing, and a threaded groove is provided on the inner side of the lower end of the upper housing. The upper housing and the lower housing are connected by the connecting threaded post and the threaded groove.

[0014] Furthermore, both the upper end face of the lower housing and the lower end face of the upper housing are provided with gasket grooves, and sealing gaskets are fitted inside the gasket grooves.

[0015] Furthermore, the upper end of the neck tube is fixedly provided with a mating threaded post, and the interior of the mating threaded post is provided with an air outlet that communicates with the neck tube. The inner diameter of the air outlet is smaller than the inner diameter of the neck tube.

[0016] Furthermore, the upper end of the neck tube is provided with a positioning baffle, and the positioning baffle is provided with a rubber sleeve. Both the positioning baffle and the rubber sleeve are sleeved on the outside of the mating threaded post.

[0017] Furthermore, the upper edge of the connecting threaded column is provided with a threaded hole, the bottom ends of the four threaded shafts are threaded into the threaded hole, and the piston plate is attached to the upper end face of the connecting threaded column under the action of the return spring.

[0018] Furthermore, a spherical movable cavity is provided inside the lower housing, a first air passage is provided at the lower part of the lower housing, and a second air passage is provided at the upper part of the lower housing. The first air passage and the second air passage are connected through the spherical movable cavity, and the second air passage passes through the connecting threaded post.

[0019] Furthermore, a sphere is movably installed inside the spherical movable cavity, and a cavity is opened at the upper end of the sphere. A third air passage is opened through the central axis of the sphere.

[0020] Furthermore, the diameter of the third airway is the same as the diameter of the first airway and the second airway, and the first airway and the second airway are on the same axis.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] When in use, this invention uses high-pressure gas inside the gas cylinder to push the piston head, allowing high-pressure gas to enter the upper shell when the gas cylinder is tilted. The thrust of the high-pressure gas pushes the piston plate, connecting rod, and piston head upward, thereby blocking the air inlet on the neck tube. This prevents high-pressure gas from entering the air inlet, thus enabling the blowout preventer to seal and prevent high-pressure gas from being ejected, improving the safety of the gas cylinder when tilted.

[0023] To ensure that high-pressure gas can enter the upper shell of the gas cylinder when it is tilted, this invention includes an eccentrically weighted sphere inside the lower shell. When the gas cylinder is upright, the eccentrically weighted sphere, under the influence of gravity, keeps the third air passage horizontal. When the gas cylinder is slightly tilted, the sphere, under the influence of gravity, prevents the third air passage from connecting with the first and second air passages, ensuring safe use of the gas cylinder. When the gas cylinder is completely tilted, the heavier part of the sphere, under the influence of gravity, is at the bottom. At this time, the third air passage connects with the first and second air passages, allowing the high-pressure gas inside the gas cylinder to enter the upper shell. This pushes the piston plate, causing the piston plate, connecting rod, and piston head to move upwards. Consequently, the piston head blocks the air inlet on the neck tube, preventing high-pressure gas from entering the air inlet. This effectively seals the air inlet, preventing high-pressure gas from being ejected and improving the safety of the gas cylinder when tilted.

[0024] Furthermore, when the gas cylinder is lifted, the gas returns to its original position under the action of gravity. At this time, the third air passage is offset from the first and second air passages, so that the high-pressure gas no longer enters the interior of the upper shell. Under the action of the return spring, the piston plate, connecting rod and piston head move downward, and the piston head disengages from the blockage of the air inlet on the neck tube, so that the gas cylinder can be used normally.

[0025] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0026] Figure 1 is a side view schematic diagram of the structure provided by the present invention;

[0027] Figure 2 is a schematic diagram of the structure from below provided by the present invention;

[0028] Figure 3 is a bottom view of the outer casing provided by the present invention;

[0029] Figure 4 is a top view of the outer casing provided by the present invention;

[0030] Figure 5 is a top view of the internal structure provided by the present invention;

[0031] Figure 6 is a bottom view of the internal structure provided by the present invention;

[0032] Figure 7 is a schematic cross-sectional view of the exploded structure provided by the present invention.

[0033] In the diagram: 1. Lower housing; 2. Upper housing; 3. Neck tube; 4. Inlet; 5. Threaded post; 6. First air passage; 7. Spherical movable cavity; 8. Second air passage; 9. Sphere; 10. Cavity; 11. Third air passage; 12. Threaded shaft; 13. Return spring; 14. Piston plate; 15. Connecting rod; 16. Piston head; 17. Sealing gasket; 18. First sealing strip; 19. Second sealing strip; 20. Threaded hole; 21. Through hole; 22. Positioning baffle; 23. Rubber sleeve; 24. Gasket groove; 25. Threaded groove; 26. Connecting threaded post; 27. Outlet. Detailed Implementation

[0034] To further understand the invention's content, features, and effects, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0035] As shown in Figures 1 to 7, an embodiment of the present invention provides a built-in gas cylinder tilting anti-spray device, comprising a lower housing 1 and an upper housing 2, which are threadedly connected. A neck tube 3 is fixedly provided at the upper end of the upper housing 2, and several air inlets 4 are axially opened on the neck tube 3. A piston head 16 is movably disposed inside the neck tube 3. Four through holes 21 are equally spaced on the outer side of the upper housing 2, and four threaded shafts 12 are threaded through the four through holes 21. Each is fitted with a return spring 13, and the lower end of the return spring 13 is connected to a piston plate 14. The edge of the piston plate 14 is movably fitted onto four threaded shafts 12. A connecting rod 15 is fixedly installed in the middle of the piston plate 14. The top end of the connecting rod 15 is fixedly connected to the bottom end of the piston head 16. The edge of the piston plate 14 is movably and sealingly connected to the inner wall of the upper housing 2. The edge of the piston head 16 is movably and sealingly connected to the inner wall of the neck tube 3. Under the action of the return spring 13, the top end of the piston head 16 is located at the lower part of several air intakes 4.

[0036] In this embodiment, preferably, a first sealing strip 18 is fitted onto the edge of the piston plate 14, and a second sealing strip 19 is fitted onto the edge of the piston head 16.

[0037] It should be noted that the setting of the first sealing strip 18 can improve the sealing performance of the piston plate 14 when sliding, and the setting of the second sealing strip 19 can improve the sealing performance of the piston head 16 when sliding, and can also improve the stable sliding performance of the piston plate 14 and piston head 16 when sliding.

[0038] In this embodiment, preferably, the upper end of the lower housing 1 is fixedly provided with a connecting threaded post 26, and the inner side of the lower end of the upper housing 2 is provided with a threaded groove 25. The upper housing 2 and the lower housing 1 are connected by the connecting threaded post 26 and the threaded groove 25.

[0039] It should be noted that the setting of the connecting threaded post 26 facilitates the threaded connection between the upper housing 2 and the lower housing 1 through the threaded groove 25, thereby improving the stability of the connection between the lower housing 1 and the upper housing 2.

[0040] In this embodiment, preferably, a gasket groove 24 is provided on the upper end face of the lower housing 1 and the lower end face of the upper housing 2, and a sealing gasket 17 is engaged and installed inside the gasket groove 24.

[0041] It should be noted that the gasket groove 24 facilitates the installation and connection of the sealing gasket 17, thereby maintaining the sealing between the lower housing 1 and the upper housing 2, and improving the contact between the lower housing 1 and the upper housing 2.

[0042] In this embodiment, preferably, the upper end of the neck tube 3 is fixedly provided with a mating threaded post 5, and the interior of the mating threaded post 5 is provided with an air outlet 27 communicating with the neck tube 3, and the inner diameter of the air outlet 27 is smaller than the inner diameter of the neck tube 3.

[0043] It should be noted that by using the threaded post 5, it is easy to connect the blowout preventer to the gas cylinder outlet, and the diameter of the outlet 27 is smaller than the diameter of the neck tube 3, which can improve the efficiency and rate of gas discharge.

[0044] In this embodiment, preferably, the upper end of the neck tube 3 is provided with a positioning baffle 22, and the positioning baffle 22 is provided with a rubber sleeve 23. Both the positioning baffle 22 and the rubber sleeve 23 are sleeved on the outside of the mating threaded post 5.

[0045] It should be noted that the positioning baffle 22 and the rubber sleeve 23 are directly attached. When they are used in conjunction with the threaded column 5 and the valve inlet, the positioning baffle 22, the rubber sleeve 23 and the valve base are squeezed and deformed, which can fully achieve the sealing effect and prevent air leakage.

[0046] In this embodiment, preferably, a threaded hole 20 is provided on the upper edge of the connecting threaded column 26, and the bottom ends of the four threaded shafts 12 are threaded into the threaded hole 20. The piston plate 14 is attached to the upper end face of the connecting threaded column 26 under the action of the return spring 13.

[0047] It should be noted that the connection to the bottom end of the threaded shaft 12 is achieved by connecting the threaded hole 20 on the threaded post 26, which can maintain the stability of the connection of the threaded shaft 12. Furthermore, the piston plate 14 is attached to the upper end face of the threaded post 26, which facilitates the pushing of high-pressure gas.

[0048] In this embodiment, preferably, a spherical movable cavity 7 is provided inside the lower housing 1, a first air passage 6 is provided at the lower part of the lower housing 1, and a second air passage 8 is provided at the upper part of the lower housing 1. The first air passage 6 and the second air passage 8 are connected through the spherical movable cavity 7, and the second air passage 8 is connected through the threaded post 26.

[0049] It should be noted that the spherical movable cavity 7 is designed to facilitate the placement of the sphere 9, and the first air passage 6 and the second air passage 8 are designed and connected to the spherical movable cavity 7 to realize the flow of high-pressure gas and realize the pushing and adjustment of the piston plate 14.

[0050] In this embodiment, preferably, a sphere 9 is movably installed inside the spherical movable cavity 7, a cavity 10 is opened at the upper end of the sphere 9, and a third air passage 11 is opened in the central axis of the sphere 9.

[0051] It should be noted that the sphere 9 is designed to block the entry of high-pressure gas and to control the inflow of high-pressure gas. The opening of the cavity 10 allows the sphere 9 to form an eccentric weight. Under the action of gravity, the angle of the sphere 9 can be adjusted, which facilitates the connection between the third air passage 11 and the first air passage 6 and the second air passage 8, so as to realize the inflow of high-pressure gas.

[0052] In this embodiment, preferably, the diameter of the third airway 11 is the same as the diameter of the first airway 6 and the second airway 8, and the first airway 6 and the second airway 8 are on the same axis.

[0053] It should be noted that the third air passage 11 has the same diameter as the first air passage 6 and the second air passage 8, which facilitates docking and allows high-pressure gas to flow in. Furthermore, the first air passage 6 and the second air passage 8 are on the same axis, and the third air passage 11 is axially arranged so that when the sphere 9 rotates, it can connect the first air passage 6 and the second air passage 8 through the third air passage 11.

[0054] The specific operational procedures for this application are as follows:

[0055] When in use, the blowout preventer is connected to the outlet of the gas cylinder via the threaded post 5, and the positioning baffle 22 and rubber sleeve 23 are directly attached between the blowout preventer and the outlet of the gas cylinder. When the threaded post 5 is engaged with the valve inlet, the positioning baffle 22, rubber sleeve 23 and valve base are squeezed and deformed, which can fully achieve the sealing effect and prevent gas leakage.

[0056] When the gas cylinder is tilted, the sphere 9 inside the spherical movable cavity 7 inside the lower shell 1 rotates. Specifically, a cavity 10 is provided at the center of the upper end of the sphere 9. The cavity 10 allows the sphere 9 to effectively adjust its angle when the gas cylinder is tilted, ensuring that the center of gravity of the sphere 9 drops below its own center. This allows the cavity 10 to be stably positioned at the upper end of the sphere 9. Furthermore, four third air passages 11 are provided laterally on the sphere 9. When the gas cylinder is placed vertically, the third air passages 11 are misaligned with the first air passage 6 and the second air passage 8. The system is configured such that high-pressure gas will not enter the interior of the upper shell 2. When the gas cylinder is tilted, the third air passage 11 is also misaligned with the first air passage 6 and the second air passage 8, preventing high-pressure gas from entering the interior of the upper shell 2. When the gas cylinder is tilted, regardless of which direction it is tilted, the sphere 9 rotates under the action of the cavity 10, causing the cavity 10 in the sphere 9 to face upward. At this time, part of the third air passage 11 will connect with the first air passage 6 and the second air passage 8, allowing the high-pressure gas in the gas cylinder to flow into the interior of the upper shell 2.

[0057] When high-pressure gas flows into the upper housing 2, it pushes the piston plate 14. The piston plate 14 is positioned and slidably mounted via four threaded shafts 12. This mounting of the piston plate 14 via the four threaded shafts 12 helps maintain its stability under the pressure of the high-pressure gas, preventing uneven force distribution and tilting. The piston plate 14 is connected to a piston head 16 via a connecting rod 15. When the piston plate 14 moves and adjusts, the piston head 16 moves and adjusts along with it via the connecting rod 15. This allows the piston head 16 to move and adjust within the neck tube 3, blocking the intake passage 4 and preventing high-pressure gas from entering. When the cylinder tipps over, high-pressure gas is ejected. When the cylinder is uprighted, the sphere 9 is straightened again, and the third air passage 11 is misaligned with the first air passage 6 and the second air passage 8. At this time, the high-pressure gas no longer enters the upper shell 2 through the first air passage 6 and the second air passage 8. Then, under the action of the return spring 13, the piston plate 14 is pushed back to its original position, and at the same time, the piston head 16 is pushed back. At this time, the piston head 16 moves to the lower part of the air inlet 4, and the air inlet 4 introduces high-pressure airflow again, so that the cylinder can achieve normal exhaust. This function overcomes the irreversible defect of the cylinder's anti-spray self-closing, so that it can achieve anti-spray after tipping over and restore normal function after being straightened.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A built-in gas cylinder tilting anti-spray device, comprising a lower housing (1) and an upper housing (2), characterized in that: The lower housing (1) and the upper housing (2) are threaded together. The upper end of the upper housing (2) is fixedly provided with a neck tube (3). Several air inlets (4) are axially opened on the neck tube (3). The upper housing (2) is provided with a piston head (16) movably disposed inside the neck tube (3). Four through holes (21) are equally spaced on the outer side of the upper housing (2). Four threaded shafts (12) are inserted through the four through holes (21). A return spring (13) is sleeved on each of the four threaded shafts (12). A piston plate (14) is connected to the lower end of the return spring (13). The edge of the piston plate (14) is movably sleeved on the four threaded shafts (12). A connecting rod (15) is fixedly installed in the middle of the piston plate (14). The top end of the connecting rod (15) is fixed to the bottom end of the piston head (16). The piston plate (14) is connected to the inner wall of the upper housing (2) in a movable sealing connection, and the piston head (16) is connected to the inner wall of the neck tube (3) in a movable sealing connection. Under the action of the return spring (13), the top of the piston head (16) is located at the lower part of several air inlets (4). The upper end of the lower housing (1) is fixedly provided with a connecting threaded post (26), and the inner side of the lower end of the upper housing (2) is provided with a threaded groove (25). The upper housing (2) and the lower housing (1) are connected by the connecting threaded post (26) and the threaded groove (25). The upper end of the neck tube (3) is fixedly provided with a mating threaded post (5). The interior of the mating threaded post (5) is provided with an air outlet (27) communicating with the neck tube (3). The inner diameter of the air outlet (27) is smaller than the inner diameter of the neck tube (3).

2. The built-in gas cylinder tilting anti-spray device according to claim 1, characterized in that: A first sealing strip (18) is fitted onto the edge of the piston plate (14), and a second sealing strip (19) is fitted onto the edge of the piston head (16).

3. The built-in gas cylinder tilting anti-spray device according to claim 1, characterized in that: The upper end face of the lower housing (1) and the lower end face of the upper housing (2) are both provided with gasket grooves (24), and a sealing gasket (17) is fitted inside the gasket groove (24).

4. The built-in gas cylinder tilting anti-spray device according to claim 1, characterized in that: The upper end of the neck tube (3) is provided with a positioning baffle (22), and the positioning baffle (22) is provided with a rubber sleeve (23). The positioning baffle (22) and the rubber sleeve (23) are both sleeved on the outside of the mating threaded column (5).

5. A built-in gas cylinder tilting anti-spray device according to claim 1, characterized in that: The upper edge of the connecting threaded column (26) is provided with a threaded hole (20), and the bottom ends of the four threaded shafts (12) are threaded into the threaded hole (20). The piston plate (14) is attached to the upper surface of the connecting threaded column (26) under the action of the return spring (13).

6. A built-in gas cylinder tilting anti-spray device according to claim 5, characterized in that: The lower housing (1) has a spherical movable cavity (7) inside, a first air passage (6) is provided at the lower part of the lower housing (1), and a second air passage (8) is provided at the upper part of the lower housing (1). The first air passage (6) and the second air passage (8) are connected through the spherical movable cavity (7), and the second air passage (8) passes through the connecting threaded post (26).

7. A built-in gas cylinder tilting anti-spray device according to claim 6, characterized in that: A sphere (9) is movably installed inside the spherical movable cavity (7). A cavity (10) is opened at the upper end of the sphere (9). A third air passage (11) is opened in the central axis of the sphere (9).

8. A built-in gas cylinder tilting anti-spray device according to claim 7, characterized in that: The diameter of the third airway (11) is the same as the diameter of the first airway (6) and the second airway (8), and the first airway (6) and the second airway (8) are on the same axis.

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