Steel cylinder special for electronic grade chemicals

Abstract

The invention belongs to the technical field of chemistry, and provides a steel cylinder special for electronic grade chemicals, which comprises a cylinder body and a protective cover, the protective cover is detachably connected with one end of the cylinder body where a valve is located, and a partition plate is fixedly mounted in the protective cover. The technical problem that in the prior art, a protective cover cannot solve the problem that pressure is increased when gas continuously leaks is solved. A first piston plate is pushed by air pressure to move downwards, an air inlet pipe is closed through a first permanent magnet and a third permanent magnet which are matched when the first piston plate moves downwards, at the moment, the first piston plate is pushed to move upwards when the air pressure in a protection cover is increased, and therefore pure nitrogen in an air cylinder is discharged into external storage equipment; and meanwhile, after the first piston plate moves to the upper end, the gas inlet pipe is opened again through a first permanent magnet and a third permanent magnet which are matched with each other, and pure nitrogen continuously leaked from the bottle body can be conveyed into external storage equipment by repeating the steps. The sealing device is widely applied to the operation scene that gas is exhausted from the sealing cavity.

Description

Technical Field

[0001] The invention belongs to the field of chemical technology, and in particular relates to a special steel cylinder for electronic-grade chemicals. Background Art

[0002] Electronic-grade chemicals are fine chemical materials specially developed for the electronics industry. They have extremely high purity and extremely low impurity content, such as high-purity nitrogen. They play a vital role in the production process of electronic components.

[0003] High-purity nitrogen is generally stored in special steel cylinders. The position of the top valve of the steel cylinder is relatively weak and is easily damaged by collision during transportation and placement. Therefore, the end of the steel cylinder is generally protected. Most of the existing protection devices seal the top of the steel cylinder through a cover when in use, and then use a gas sensor to detect whether there is a gas leak. However, the valve may be opened due to vibration or collision during transportation of the steel cylinder, which will cause the gas to continue to leak to the outside, so that the air pressure in the cover will gradually increase. Due to the limitation of production costs, the pressure-bearing capacity of the cover is generally difficult to compare with that of the steel cylinder. Therefore, the pressure increase will cause the cover to deform or even rupture, resulting in damage to the sealing connection between the cover and the bottle, causing high-purity nitrogen to directly escape into the air and pollute the surrounding environment. Summary of the invention

[0004] The purpose of the present invention is to provide a special steel cylinder for electronic-grade chemicals, aiming to solve the technical problem in the prior art that the protective cover body cannot solve the pressure increase when the gas leaks continuously.

[0005] The present invention is implemented as follows: a steel cylinder for electronic-grade chemicals comprises a bottle body and a protective cover, the protective cover is detachably connected to one end of the bottle body where a valve is located, a partition is fixedly installed in the protective cover, a first through hole is opened on the partition and the partition divides the protective cover into a first cavity and a second cavity, a gas cylinder located in the first cavity is fixedly installed on the partition, the gas cylinder is connected to an intake pipe and an exhaust pipe, the exhaust pipe is connected to an external gas storage device and the inlet end of the intake pipe is located in the second cavity; The lower end of the air cylinder is an open structure and a first piston plate is slidably installed in the air cylinder. The first piston plate drives the first permanent magnet located on the outside of the air cylinder to move synchronously. The second permanent magnet and the third permanent magnet located at both ends of the air cylinder are arranged on the partition. The first permanent magnet and the second permanent magnet magnetically repel each other, and the first permanent magnet and the third permanent magnet magnetically attract each other. A sealing plate located in the second cavity and used to close the inlet end of the intake pipe is slidably installed on the partition, and the sealing plate is connected to the second permanent magnet.

[0006] Further technical solution: A first bracket is fixedly installed on the surface of the partition close to the bottle body, and a vertical rod that moves along the radial direction of the gas cylinder is slidably installed on the first bracket, and both ends of the vertical rod are fixedly connected to the second permanent magnet and the third permanent magnet respectively.

[0007] Further technical solution: a second bracket is fixedly installed on the surface of the partition away from the bottle body, the sealing plate is slidably installed on the second bracket and a fourth permanent magnet is fixedly installed on one end of the sealing plate close to the partition, the fourth permanent magnet is magnetically attracted to the second permanent magnet, and when the second permanent magnet moves, the sealing plate is driven to move by the fourth permanent magnet.

[0008] Further technical solution: A guide column is fixedly installed on the partition, a baffle is slidably installed on the guide column, a first elastic member is fixedly installed on the end of the guide column, the end of the first elastic member away from the guide column is connected to the baffle, and the baffle closes the first through hole when it moves downward and contacts the partition.

[0009] Further technical solution: A bottom plate is provided at one end of the protective cover close to the bottle body, the bottom plate is threadedly connected to the protective cover, a second through hole is opened at the edge of the bottom plate and a fifth permanent magnet is slidably installed on the bottom plate, a second elastic member is fixedly installed on the bottom plate, the second elastic member is fixedly connected to the fifth permanent magnet, and the second through hole is closed when the fifth permanent magnet moves toward the side wall of the protective cover.

[0010] Further technical solution: A through hole is opened on the protective cover on the extension line of the moving path of the fifth permanent magnet, and a screw is installed in the inner thread of the through hole. The screw drives the attraction iron block to move, and when the attraction iron block moves toward the side of the fifth permanent magnet, it attracts the fifth permanent magnet to move toward it.

[0011] Further technical solution: an exhaust pipe is fixedly installed inside the protective cover and is located between the partition and the bottom plate; an air inlet end and an air outlet pipe are arranged at one end of the exhaust pipe away from the side wall of the protective cover; the air outlet pipe is connected to the outside world; a one-way valve is arranged on the air inlet end and the air outlet pipe of the exhaust pipe; a second piston plate is slidably installed inside the exhaust pipe, and a piston rod extending out of the protective cover is fixedly installed on the second piston plate.

[0012] Further technical solution: A rotating part is arranged at one end of the piston rod away from the second piston plate, an external thread is arranged on the surface of the rotating part, and the rotating part is threadedly connected to a fixing frame fixedly mounted on the protective cover.

[0013] Further technical solution: a glass cover located between the partition plate and the bottom plate is fixedly installed in the protective cover, an air bag is arranged in the glass cover, and the air bag is connected with the protective cover.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Due to the continuous leakage of the air pressure in the bottle body, the air pressure is continuously increased as a power source for pushing the first piston plate to move, and the air pressure is used to push the pure nitrogen into the cylinder and push the first piston plate downward. When the first piston plate moves downward, the intake pipe is closed by the matched first permanent magnet and the third permanent magnet. At this time, the increase in the gas pressure in the protective cover will push the first piston plate to move up, thereby discharging the pure nitrogen in the cylinder to an external storage device. At the same time, after the first piston plate moves to the upper end, the intake pipe will be opened again by the matched first permanent magnet and the third permanent magnet. Repeating the above steps can intermittently transport the pure nitrogen that continues to leak in the bottle body to the external storage device, thereby realizing the outward discharge of the gas in the protective cover, and ensuring that the discharged gas is all pure leaked nitrogen, reducing the large amount of pure nitrogen pollution and waste caused by the leakage of the bottle body, improving the collection and treatment effect of the leaked nitrogen, and at the same time ensuring that the air pressure in the protective cover is in a stable state, reducing the probability of damage to the protective cover.

[0015] 2. When a small amount of gas in the bottle leaks, the second piston plate is first reciprocated to extract part of the mixed gas in the protective cover and discharge it. A part of the mixed gas in the protective cover is discharged first to reduce the volume occupied by the air, so that the residual nitrogen in the protective cover can be distributed between the bottom plate and the partition, and then the residual nitrogen is sealed in the sealing area surrounded by the bottom plate, the partition and the protective cover, so as to avoid the leaked nitrogen in the protective cover from directly merging into the air when the protective cover is opened, avoid pollution to the external environment, avoid the leaked nitrogen from being inhaled by the staff and cause harm, and further improve the protection against leaked nitrogen.

[0016] 3. When there is residual nitrogen in the protective cover after the continuous leakage of nitrogen in the bottle, the second piston plate is reciprocated to extract and discharge part of the mixed gas in the protective cover, reducing the volume occupied by the air, so that the residual nitrogen in the protective cover can be distributed above the bottom plate, and then the protective cover is closed by the bottom plate, and then the gas in the protective cover is extracted and cleaned through the air pipe, further ensuring that the nitrogen in the protective cover will not escape into the outside air, improving the protection against leaked nitrogen, realizing multi-mode treatment of nitrogen in the protective cover, and improving the treatment effect in actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the structure inside the protective cover of the present invention.

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the protective cover in the present invention.

[0020] Figure 4It is the front view of the protective cover in the present invention.

[0021] Figure 5 It is a structural schematic diagram of the gas cylinder in the present invention.

[0022] Figure 6 for Figure 3 A magnified schematic diagram of the A1 region in the middle.

[0023] Figure 7 for Figure 3 A magnified schematic diagram of the A2 region in the middle.

[0024] In the accompanying drawings: 1, bottle body; 2, protective cover; 3, connecting ring; 4, glass cover; 5, air bag; 6, partition; 7, first through hole; 8, guide column; 9, first elastic member; 10, baffle; 11, air cylinder; 12, first piston plate; 13, push rod; 14, first permanent magnet; 15, first bracket; 16, vertical rod; 17, second permanent magnet; 18, third permanent magnet; 19, second bracket; 20, sealing plate; 21, fourth permanent magnet; 22, air inlet pipe; 23, exhaust pipe; 24, exhaust cylinder; 25, second piston plate; 26, piston rod; 27, fixing frame; 28, air outlet pipe; 29, bottom plate; 30, fifth permanent magnet; 31, second elastic member; 32, second through hole; 33, screw; 34, attracting iron block; 35, first cavity; 36, second cavity. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0027] like Figure 1-Figure 3 As shown, a steel cylinder for electronic-grade chemicals provided by the present invention comprises a bottle body 1 and a protective cover 2, wherein the protective cover 2 is detachably connected to the end of the bottle body 1 where the valve is located, and a connecting ring 3 is fixedly installed on the end of the bottle body 1 where the valve is located, and the protective cover 2 is connected to the connecting ring 3 by threads; A partition 6 is fixedly installed in the protective cover 2, a first through hole 7 is opened on the partition 6, and the partition 6 divides the protective cover 2 into a first cavity 35 and a second cavity 36, a guide column 8 is fixedly installed on the partition 6, a baffle 10 is slidably installed on the guide column 8, a first elastic member 9 is fixedly installed on the end of the guide column 8, and the end of the first elastic member 9 away from the guide column 8 is connected to the baffle 10, and the baffle 10 closes the first through hole 7 when it moves downward and contacts the partition 6, and an air cylinder 11 located in the first cavity 35 is fixedly installed on the partition 6, and the air cylinder 11 is connected to the intake pipe 22 and the exhaust pipe 23, and the intake pipe 22 and the exhaust pipe 23 are both provided with a one-way valve, the exhaust pipe 23 is connected to the external gas storage device, and the inlet end of the intake pipe 22 is located in the second cavity 36; The lower end of the air cylinder 11 is an open structure and a first piston plate 12 is slidably installed in the air cylinder 11, a push rod 13 is fixedly installed on the first piston plate 12, a through hole is opened in the middle of the push rod 13 and both ends of the through hole are connected to the side walls that penetrate the push rod 13, the first piston plate 12 drives the first permanent magnet 14 located on the outside of the air cylinder 11 to move synchronously, the partition plate 6 is provided with a second permanent magnet 17 and a third permanent magnet 18 located at both ends of the air cylinder 11, the first permanent magnet 14 and the second permanent magnet 17 magnetically repel each other, and the first permanent magnet 14 and the third permanent magnet 18 magnetically attract each other, a sealing plate 20 for closing the inlet end of the intake pipe 22 located in the second cavity 36 is slidably installed on the partition plate 6, and the sealing plate 20 is connected to the second permanent magnet 17.

[0028] In actual application of this embodiment, the protective cover 2 is installed on the bottle body 1 through the connecting ring 3, and the valve on the bottle body 1 is protected by the protective cover 2. When the bottle body 1 is stored or transported for a long time, the exhaust pipe 23 is connected to the external gas storage device. In the initial state, the first piston plate 12 is located at the top of the gas cylinder 11. At this time, the first permanent magnet 14 repels the second permanent magnet 17, and then the second permanent magnet 17 drives the sealing plate 20 to be located on the side away from the end of the intake pipe 22; When the valve of the bottle body 1 has problems during storage or transportation due to vibration or other reasons, resulting in continuous leakage of nitrogen in the bottle body 1, the air pressure in the first cavity 35 gradually increases. Since nitrogen is lighter than air, the nitrogen will push the baffle 10 upward and enter the second cavity 36. The air pressure in the second cavity 36 gradually increases. During the period of increased air pressure, all the air on the top of the protective cover 2 is squeezed by the nitrogen to the area below the partition 6, so that the area above the partition 6 is pure nitrogen. When the air pressure in the second cavity 36 is greater than the opening pressure of the one-way valve on the intake pipe 22, the air pressure in the second cavity 36 increases. After the force is applied, pure nitrogen enters the cylinder 11 through the intake pipe 22 and pushes the first piston plate 12 to move downward. When the first piston plate 12 moves to the bottom, the first permanent magnet 14 attracts the third permanent magnet 18 to approach the cylinder 11. The third permanent magnet 18 simultaneously drives the second permanent magnet 17 to move, and then the second permanent magnet 17 drives the sealing plate 20 to move and close the entrance of the intake pipe 22. Due to the continuous leakage of nitrogen in the bottle body 1, the air pressure in the first cavity 35 continues to increase, and then the gas in the first cavity 35 will push the first piston plate 12 to move upward. , so that the nitrogen in the cylinder 11 is transported to the external storage device through the exhaust pipe 23 under the push of the first piston plate 12. When the first piston plate 12 moves to the top, the first permanent magnet 14 repels the second permanent magnet 17 again, so that the sealing plate 20 is away from the intake pipe 22. At this time, the nitrogen in the protective cover 2 can continue to enter the cylinder 11 to push the first piston plate 12 to move downward. Repeat the above steps to transport the pure nitrogen that continues to leak in the bottle 1 to the external storage device. Due to the continuous leakage of the air pressure in the bottle 1, by continuously increasing the air pressure As a power source for pushing the first piston plate 12 to move, the first piston plate 12 can intermittently transport the pure gas in the gas cylinder 11 to an external storage device when it moves back and forth, thereby realizing the outward discharge of the gas in the protective cover 2, and at the same time ensuring that the discharged gas is pure leaked nitrogen, reducing a large amount of pure nitrogen pollution and waste caused by leakage of the bottle body 1, improving the collection and treatment effect of the leaked nitrogen, and at the same time ensuring that the air pressure in the protective cover 2 is in a stable state, reducing the probability of damage to the protective cover 2, and the residual gas in the protective cover 2 can be processed subsequently.

[0029] like Figure 1-Figure 3 As shown, a special steel cylinder for electronic-grade chemicals provided by the present invention is provided. A first bracket 15 is fixedly installed on the surface of the partition 6 close to the bottle body 1, and a vertical rod 16 that moves along the radial direction of the gas cylinder 11 is slidably installed on the first bracket 15. The two ends of the vertical rod 16 are fixedly connected to the second permanent magnet 17 and the third permanent magnet 18 respectively.

[0030] Specifically, a second bracket 19 is fixedly installed on the surface of the partition 6 away from the bottle body 1, and the sealing plate 20 is slidably installed on the second bracket 19 and a fourth permanent magnet 21 is fixedly installed on one end of the sealing plate 20 close to the partition 6. The fourth permanent magnet 21 is magnetically attracted to the second permanent magnet 17. When the second permanent magnet 17 moves, the sealing plate 20 is driven to move through the fourth permanent magnet 21.

[0031] In actual application of this embodiment, the second permanent magnet 17 and the third permanent magnet 18 are connected by the vertical rod 16, and then the first permanent magnet 14 excludes the movement of the second permanent magnet 17 or the first permanent magnet 14 attracts the movement of the third permanent magnet 18, which will cause the second permanent magnet 17 and the third permanent magnet 18 to move synchronously, and the vertical rod 16 is supported and guided by the first bracket 15; When the second permanent magnet 17 moves, due to the mutual adsorption between the second permanent magnet 17 and the fourth permanent magnet 21, the second permanent magnet 17 will drive the fourth permanent magnet 21 to move synchronously under the action of magnetic force, and then the fourth permanent magnet 21 will drive the sealing plate 20 to move to complete the adjustment of the position of the sealing plate 20; The first bracket 15 is provided with magnets located on both sides of the vertical rod 16, and the vertical rod 16 is provided with an iron block attracted by the magnet. When the sealing plate 20 contacts the inlet end of the intake pipe 22, the vertical rod 16 contacts the magnet close to the air cylinder 11, and the vertical rod 16 is temporarily fixed by the cooperation of the magnet and the iron block. The fixing force of the magnet and the iron block on the vertical rod 16 is smaller than the force exerted on the vertical rod 16 by the first permanent magnet 14, the second permanent magnet 17 and the third permanent magnet 18 when used in cooperation. At the same time, the second bracket 19 is provided with a limit block for limiting the position of the sealing plate 20 to avoid the sealing plate 20 and the vertical rod 16 from moving randomly due to vibration and the like, thereby ensuring that the second permanent magnet 17 can stably drive the sealing plate 20 to move, thereby improving the stability of the position of the sealing plate 20.

[0032] like Figure 1-Figure 3 As shown, a special steel cylinder for electronic-grade chemicals provided by the present invention is provided with a bottom plate 29 at one end of the protective cover 2 close to the bottle body 1, the bottom plate 29 is threadedly connected to the protective cover 2, a second through hole 32 is opened at the edge of the bottom plate 29, and a fifth permanent magnet 30 is slidably installed on the bottom plate 29, a second elastic member 31 is fixedly installed on the bottom plate 29, the second elastic member 31 is fixedly connected to the fifth permanent magnet 30, and the fifth permanent magnet 30 closes the second through hole 32 when moving toward the side wall of the protective cover 2.

[0033] Specifically, a through hole is opened on the protective cover 2 on the extension line of the moving path of the fifth permanent magnet 30, and a screw 33 is installed in the inner thread of the through hole. The screw 33 drives the attraction iron block 34 to move. When the attraction iron block 34 moves toward the side of the fifth permanent magnet 30, it attracts the fifth permanent magnet 30 to move toward it.

[0034] Specifically, an exhaust pipe 24 is fixedly installed in the protective cover 2 and is located between the partition 6 and the bottom plate 29. An end of the exhaust pipe 24 away from the side wall of the protective cover 2 is provided with an air inlet end and an air outlet pipe 28. The air outlet pipe 28 is connected to the outside world. A one-way valve is provided on the air inlet end and the air outlet pipe 28 of the exhaust pipe 24. A second piston plate 25 is slidably installed in the exhaust pipe 24, and a piston rod 26 extending out of the protective cover 2 is fixedly installed on the second piston plate 25.

[0035] Specifically, a rotating portion is provided at one end of the piston rod 26 away from the second piston plate 25 , an external thread is provided on the surface of the rotating portion, and the rotating portion is threadedly connected to a fixing frame 27 fixedly mounted on the protective cover 2 .

[0036] Specifically, a glass cover 4 located between the partition plate 6 and the bottom plate 29 is fixedly installed in the protective cover 2 , and an air bag 5 is arranged in the glass cover 4 , and the air bag 5 is communicated with the protective cover 2 .

[0037] In actual application of this embodiment, if the nitrogen in the bottle body 1 leaks, the added nitrogen or the original air in the protective cover 2 will enter the airbag 5, and the airbag 5 will swell at this time. The staff can judge whether there is nitrogen leakage by the swelling state of the airbag 5. If the amount of leaked nitrogen is large, the airbag 5 will swell and contact the glass cover 4, and the glass cover 4 will protect the airbag 5 to prevent the airbag 5 from rupturing. When the amount of leaked nitrogen is small, the air pressure in the protective cover 2 is insufficient to push the baffle 10 upward, and the leaked nitrogen in the bottle body 1 is located below the partition 6 in the protective cover 2. Since nitrogen is lighter than air, the nitrogen will be located above the air. If the protective cover 2 needs to be opened for use, the outlet pipe 28 is first connected to the external gas purification equipment or container. At this time, the second piston plate 25 is driven to reciprocate in the exhaust pipe 24 by the piston rod 26. Since a one-way valve is provided on the air inlet end of the exhaust pipe 24 and the outlet pipe 28, Then, when the second piston plate 25 moves back and forth, it can extract the air in the protective cover 2 and transport it to the external gas purification equipment through the outlet pipe 28. The air inlet end of the exhaust pipe 24 is located in the area close to the partition 6. The nitrogen leaked in the protective cover 2 is limitedly discharged from the protective cover 2. When the second piston plate 25 is obviously pulled to move so that the resistance becomes larger, it means that a large amount of gas in the protective cover 2 is discharged. At this time, the nitrogen in the protective cover 2 is completely discharged or a small amount of nitrogen remains. The small amount of residual nitrogen is located in the top area of ​​the protective cover 2 close to the partition 6; At this time, the screw 33 is rotated to drive the attracting iron block 34 to approach the fifth permanent magnet 30. Under the action of magnetic force, the fifth permanent magnet 30 moves to the side of the attracting iron block 34. When the fifth permanent magnet 30 moves, the second elastic member 31 is stretched and the second through hole 32 is blocked, so that a small amount of residual nitrogen is sealed between the bottom plate 29 and the partition 6. At this time, the protective cover 2 can be rotated to disconnect it from the bottle body 1, so that a part of the mixed gas in the protective cover 2 can be discharged first, reducing the volume occupied by the air, so that the residual nitrogen in the protective cover 2 can be fully distributed between the bottom plate 29 and the partition 6, so that the residual nitrogen can be subsequently discharged through the sealing area surrounded by the bottom plate 29, the partition 6 and the protective cover 2. The nitrogen is sealed, so as to prevent the leaked nitrogen in the protective cover 2 from directly merging into the air when the protective cover 2 is opened, so as to prevent the external environment from being polluted, and to prevent the leaked nitrogen from being inhaled by the staff and causing harm. Subsequently, the outlet pipe 28 is connected to the external vacuum equipment to extract and process the residual mixed gas between the bottom plate 29 and the partition 6. When the exhaust pipe 24 is not in use, the second piston plate 25 is moved to the end of the exhaust pipe 24 away from the side wall of the protective cover 2, and the rotating part of the piston rod 26 is rotated, and the rotating part is connected to the fixing frame 27 through the thread, so that the second piston plate 25 can be pressed against the end of the exhaust pipe 24 to prevent the second piston plate 25 from moving and causing gas leakage. When the gas in the bottle body 1 continues to leak, the gas pressure in the protective cover 2 is sufficient to drive the baffle 10 to move upward. The pressure applied to the baffle 10 by the first elastic member 9 ensures that the subsequent nitrogen can enter the upper part of the partition 6. The nitrogen will move to the top of the protective cover 2 through the first through hole 7, and the air above the partition 6 will also be squeezed downward by the nitrogen and move to the lower part of the partition 6. Due to the continuous leakage of nitrogen in the bottle body 1, the air pressure in the protective cover 2 will continue to increase, and then under the action of the air pressure, the subsequent pure nitrogen located above the partition 6 will enter the gas cylinder 11 through the air inlet pipe 22, and then be discharged to the external storage device through the exhaust pipe 23, thereby realizing the collection and treatment of the pure leaked nitrogen; When the nitrogen in the bottle body 1 stops leaking, the pressure in the protective cover 2 is insufficient to continue to push the nitrogen on the top to move to the storage device. At this time, repeat the above steps to extract the gas in the protective cover 2 through the exhaust pipe 24, and then close the lower end of the protective cover 2 through the bottom plate 29 again. The protective cover 2 can be opened by support, and then the exhaust pipe 23 is connected to the external vacuum equipment to extract the residual mixed gas in the protective cover 2 and treat it.

[0038] In an example of the present embodiment, the first elastic member 9 and the second elastic member 31 are respectively the first spring and the second spring, and of course they can also be other elastic members such as elastic balls. The first spring applies thrust to the baffle 10, and the second spring applies tension to the fifth permanent magnet 30.

[0039] The above description is only a preferred embodiment of the present invention and is 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 in the protection scope of the present invention.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A steel cylinder for electronic-grade chemicals, comprising a bottle body (1) and a protective cover (2), wherein the protective cover (2) is detachably connected to the end of the bottle body (1) where the valve is located, and characterized in that: A partition (6) is fixedly mounted in the protective cover (2), a first through hole (7) is formed on the partition (6), and the partition 6 divides the protective cover (2) into a first cavity (35) and a second cavity (36), a gas cylinder (11) located in the first cavity (35) is fixedly mounted on the partition (6), the gas cylinder (11) is connected to an air intake pipe (22) and an exhaust pipe (23), the exhaust pipe (23) is connected to an external gas storage device, and an inlet end of the air intake pipe (22) is located in the second cavity (36); The lower end of the gas cylinder (11) is an open structure and a first piston plate (12) is slidably mounted inside the gas cylinder (11). The first piston plate (12) drives a first permanent magnet (14) located outside the gas cylinder (11) to move synchronously. A second permanent magnet (17) and a third permanent magnet (18) located at two ends of the gas cylinder (11) are arranged on the partition plate (6). The first permanent magnet (14) and the second permanent magnet (17) repel each other magnetically, and the first permanent magnet (14) and the third permanent magnet (18) attract each other magnetically. A sealing plate (20) located in the second cavity (36) and used for sealing an inlet end of an intake pipe (22) is slidably mounted on the partition plate (6). The sealing plate (20) is connected to the second permanent magnet (17).

2. The electronic grade chemical special steel cylinder according to claim 1, characterized in that: A first bracket (15) is fixedly mounted on a surface of the partition (6) close to the bottle body (1), a vertical rod (16) that moves along the radial direction of the gas cylinder (11) is slidably mounted on the first bracket (15), and two ends of the vertical rod (16) are respectively fixedly connected to the second permanent magnet (17) and the third permanent magnet (18).

3. The electronic grade chemical special steel cylinder according to claim 2, characterized in that: A second bracket (19) is fixedly mounted on a surface of the partition (6) away from the bottle body (1), the sealing plate (20) is slidably mounted on the second bracket (19), and a fourth permanent magnet (21) is fixedly mounted on one end of the sealing plate (20) close to the partition (6), the fourth permanent magnet (21) and the second permanent magnet (17) are magnetically attracted to each other, and when the second permanent magnet (17) moves, the sealing plate (20) is driven to move via the fourth permanent magnet (21).

4. The electronic grade chemical special steel cylinder according to claim 1, characterized in that: A guide column (8) is fixedly mounted on the partition (6), a baffle (10) is slidably mounted on the guide column (8), a first elastic member (9) is fixedly mounted on the end of the guide column (8), an end of the first elastic member (9) away from the guide column (8) is connected to the baffle (10), and the baffle (10) closes the first through hole (7) when it moves downward and contacts the partition (6).

5. The electronic grade chemical special steel cylinder according to claim 1, characterized in that: A bottom plate (29) is provided at one end of the protective cover (2) close to the bottle body (1), the bottom plate (29) and the protective cover (2) are threadedly connected, a second through hole (32) is provided at the edge of the bottom plate (29), a fifth permanent magnet (30) is slidably mounted on the bottom plate (29), a second elastic member (31) is fixedly mounted on the bottom plate (29), the second elastic member (31) is fixedly connected to the fifth permanent magnet (30), and the fifth permanent magnet (30) closes the second through hole (32) when moving toward the side wall of the protective cover (2).

6. The electronic grade chemical special steel cylinder according to claim 5, characterized in that: The protective cover (2) is provided with a through hole located on an extension line of the moving path of the fifth permanent magnet (30), and a screw rod (33) is installed in the threaded inner part of the through hole. The screw rod (33) drives the attracting iron block (34) to move, and when the attracting iron block (34) moves toward the side of the fifth permanent magnet (30), it attracts the fifth permanent magnet (30) to move toward it.

7. The electronic grade chemical special steel cylinder according to claim 6, characterized in that: An exhaust pipe (24) located between the partition plate (6) and the bottom plate (29) is fixedly installed in the protective cover (2); an air inlet end and an air outlet pipe (28) are arranged at one end of the exhaust pipe (24) away from the side wall of the protective cover (2); the air outlet pipe (28) is communicated with the outside; a one-way valve is arranged on the air inlet end and the air outlet pipe (28) of the exhaust pipe (24); a second piston plate (25) is slidably installed in the exhaust pipe (24); a piston rod (26) extending out of the protective cover (2) is fixedly installed on the second piston plate (25).

8. The electronic grade chemical special steel cylinder according to claim 7, characterized in that: A rotating portion is provided at one end of the piston rod (26) away from the second piston plate (25), an external thread is provided on the surface of the rotating portion, and the rotating portion is threadedly connected to a fixing frame (27) fixedly mounted on the protective cover (2).

9. The electronic grade chemical special steel cylinder according to claim 8, characterized in that: A glass cover (4) located between the partition (6) and the bottom plate (29) is fixedly installed in the protective cover (2), an air bag (5) is arranged in the glass cover (4), and the air bag (5) is connected to the protective cover (2).

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