A device for cleaning the inner wall of a gas cylinder with deionized water

Abstract

The utility model relates to gas cylinder processing technical field, concretely is a kind of gas cylinder inner wall's deionized water cleaning device, including support, the inside top of support is equipped with cleaning component, gas cylinder is placed in the inside bottom of support, the side of cleaning component is driven to lift by driving lifting component and drives to lift operation, the bottom of cleaning component is cleaned from gas cylinder top opening and is inserted, and cleaning component includes shaft, the outer wall of shaft is equipped with several cleaning brushes, and shaft is driven by rotating motor, and then drive cleaning brush to carry out friction cleaning along gas cylinder inner wall.This gas cylinder inner wall's deionized water cleaning device, cleaning brush uses spring-driven telescopic structure, spherical brush head can automatically resist tightly gas cylinder inner wall under the spring elasticity, can follow the flexible telescoping of inner wall size change.Compared with the rigid cleaning plate of cam driving in comparison file, the design can be adapted to different inner diameter gas cylinder, and can adapt to inner wall slight deformation or radian change, effectively avoid the cleaning dead angle caused by not closely.

Description

Technical Field

[0001] This utility model relates to the field of gas cylinder processing technology, specifically to a deionized water cleaning device for the inner wall of a gas cylinder. Background Technology

[0002] In industrial production, medical care, and energy storage and transportation, gas cylinders serve as storage carriers for high-pressure gases, and the cleanliness of their inner walls directly affects gas purity and safety. Residual metal debris, oxide layers, or impurities can not only contaminate the filling medium but also trigger localized corrosion or chemical reactions under high pressure, leading to shortened cylinder lifespan or even safety accidents. Therefore, using deionized water for inner wall cleaning has become an industry standard process. This effectively avoids secondary contamination caused by traditional solvent cleaning and is particularly suitable for handling specialty gas cylinders with stringent purity requirements. In existing technologies, gas cylinder inner wall cleaning devices have gradually replaced manual operation, but there is still significant room for improvement. For example, Chinese patent CN119327825A discloses a rapid gas cylinder cleaning device, which uses a cam-driven adjustment component to control the horizontal movement of the side cleaning component, achieving the fit between the cleaning plate and inner walls of different diameters. Although this technology solves the problem of poor adaptability of traditional fixed brush heads, the adjustment mechanism relies on the mechanical transmission of the cam, resulting in a response lag. Furthermore, the cleaning plate is a rigid structure, which can easily lead to poor fit or excessive local friction when there are slight deformations or curvature changes in the inner wall of the gas cylinder. In addition, the brush head has a fixed size after unfolding, and the cam needs to be adjusted in reverse when entering and exiting the cylinder opening, which is cumbersome and prone to collision with the edge of the cylinder opening. Utility Model Content

[0003] The purpose of this utility model is to provide a deionized water cleaning device for the inner wall of a gas cylinder, so as to solve the problem that although the technology mentioned in the background technology solves the problem of poor adaptability of traditional fixed brush heads, the adjustment mechanism relies on the mechanical transmission of the cam, which has a response lag. In addition, the cleaning plate is a rigid structure, which is prone to poor fit or excessive local friction when there are slight deformations or curvature changes in the inner wall of the gas cylinder.

[0004] To achieve the above objectives, this utility model provides a deionized water cleaning device for the inner wall of a gas cylinder, including a bracket. A cleaning component is installed on the top inner side of the bracket, and a gas cylinder is placed on the bottom inner side of the bracket. One side of the cleaning component is driven to lift and lower via a lifting mechanism. The bottom of the cleaning component extends into the top opening of the gas cylinder for cleaning. The cleaning component includes a rotating shaft, and several cleaning brushes are installed on the outer wall of the rotating shaft along the axial direction. The rotating shaft is driven by a rotary motor, which in turn drives the cleaning brushes to perform friction cleaning along the inner wall of the gas cylinder.

[0005] This setup uses a bracket to construct an overall support frame, driving the lifting component to move the cleaning component along the cylinder axis. At the same time, a rotating motor drives the shaft and cleaning brush to rotate at high speed, causing the cleaning brush to make frictional contact with the inner wall of the cylinder, which, combined with deionized water, achieves cleaning of the inner wall.

[0006] Preferably, the bracket includes a support groove for supporting and limiting the bottom end of the gas cylinder.

[0007] The inner side of the support groove is designed to match the bottom of the gas cylinder. The vertical positioning and radial limiting of the gas cylinder are achieved through surface contact, preventing the gas cylinder from tipping over or shifting during the cleaning process.

[0008] Preferably, a side plate is installed on one side of the outer wall of the support groove, and the driving lifting component includes a lifting ring. The lifting ring can be fitted onto the outside of the gas cylinder and slides with the outer wall of the gas cylinder. A lead screw is vertically rotatably installed on one side of the lifting ring, and a lead screw slider is threaded on the outside of the lead screw. The outer wall of the lifting ring is connected and fixed to the lead screw slider.

[0009] This design uses a side plate as the mounting carrier for the drive lifting component. The lead screw and lead screw slider form a helical transmission pair. When the lead screw rotates, it drives the slider and lifting ring to move vertically. The sliding fit between the lifting ring and the outer wall of the gas cylinder forms an auxiliary guide to ensure the coaxiality of the cleaning component and the gas cylinder.

[0010] Preferably, a guide block is installed on the side of the lifting ring near the side plate, and a guide groove is vertically provided on the side plate, with the guide block and the guide groove engaging in a limiting sliding fit.

[0011] This feature sets up a sliding constraint mechanism between the guide block and the guide groove, which restricts the lifting ring to move only vertically, counteracts the radial torque that may be generated during the screw drive, and prevents the lifting ring from swaying or jamming.

[0012] Preferably, the bottom of the lead screw is driven to rotate by a lead screw motor, and the top of the lead screw is mounted with a fixed seat via a bearing. One side of the fixed seat is connected and fixed to the top of the side plate.

[0013] This design features a lead screw with power input from a lead screw motor at the bottom and a connection to a fixed base via a bearing at the top, forming a "two-end support" structure. This minimizes the deflection of the lead screw during high-speed rotation. The rigid connection between the fixed base and the side plate further enhances structural stability.

[0014] Preferably, the cleaning component further includes a column, the bottom end of which is mounted on the top surface of the lifting ring, and a mounting plate is fixed to one side of the top of the column. A rotary motor is mounted on the top of the mounting plate, and the top of the rotating shaft is driven to rotate by the rotary motor.

[0015] This feature allows the support column to transmit the movement of the lifting ring to the mounting plate, creating a rigid, synchronously lifting assembly between the cleaning components and the lifting ring. The mounting plate provides stable support for the rotary motor, ensuring that the axis of rotation of the rotating shaft coincides with the central axis of the gas cylinder.

[0016] Preferably, the cleaning brush includes a fixed rod, one end of which is connected to the outer wall of the rotating shaft, and the other end is slidably fitted with a sleeve. A spherical brush head is installed at the outer end of the sleeve, and a spring is provided at the end of the sleeve away from the spherical brush head. The spring is fitted on the outside of the fixed rod, and the end of the spring away from the sleeve abuts against the outer wall of the rotating shaft. The spring can drive the spherical brush head to press against the inner wall of the gas cylinder, so that the spherical brush head can extend and retract according to the size of the inner wall, and facilitate the shortening of the cleaning brush and its removal from the top opening of the gas cylinder.

[0017] This cleaning brush uses a flexible telescopic structure of "fixed rod-sleeve-spring". The preload of the spring keeps the spherical brush head in contact with the inner wall. When the diameter of the inner wall of the gas cylinder changes, the spring adjusts the extension length of the brush head by telescopic adjustment. When entering or exiting the bottle opening, the external force compresses the spring to shorten the brush head to a size smaller than the diameter of the bottle opening.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: In the deionized water cleaning device for the inner wall of this gas cylinder, the cleaning brush adopts a spring-driven telescopic structure. The spherical brush head can automatically press against the inner wall of the gas cylinder under the action of the spring force, and can flexibly extend and retract according to the changes in the inner wall size. Compared with the cam-driven rigid cleaning plate in the comparative document, this design can adapt to gas cylinders with different inner diameters and can adapt to slight deformations or curvature changes of the inner wall, effectively avoiding cleaning dead corners caused by loose fit, while reducing excessive friction caused by rigid contact and reducing the risk of damage to the inner wall of the gas cylinder. When the cleaning brush enters or exits the gas cylinder opening, the funnel cover can compress the spring to shorten the brush head, which solves the cumbersome problem of the traditional device requiring reverse operation of the cam to enter and exit the brush head. This not only saves operation time but also reduces the probability of the brush head colliding with the edge of the cylinder opening, thus improving the safety of the equipment. The lifting mechanism uses a screw drive system, combined with the sliding engagement of the guide block and guide groove, to ensure smooth operation of the cleaning component during lifting and avoiding uneven cleaning caused by shaking. The rotary motor drives the shaft to rotate the cleaning brush at high speed, forming a spiral cleaning path in conjunction with the lifting action. This allows for comprehensive and deep friction cleaning of the inner wall of the gas cylinder, significantly improving the efficiency of stain removal, and is especially suitable for removing stubborn impurities such as metal shavings and oxide layers. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the driving lifting component in this utility model; Figure 3 This is a schematic diagram of the lifting ring structure in this utility model; Figure 4 This is a schematic diagram of the cleaning component in this utility model; Figure 5 This is a schematic diagram of the cleaning brush in this utility model; The meanings of the labels in the diagram are as follows: 1. Bracket; 11. Support groove; 12. Side plate; 121. Guide groove; 2. Drive lifting component; 21. Lifting ring; 211. Guide block; 22. Lead screw; 23. Lead screw motor; 24. Lead screw slider; 25. Fixed seat; 3. Cleaning component; 31. Column; 32. Mounting plate; 33. Rotating shaft; 34. Cleaning brush; 341. Fixed rod; 342. Sleeve; 343. Spherical brush head; 344. Spring; 35. Rotary motor; 4. Gas cylinder. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This utility model provides a deionized water cleaning device for the inner wall of a gas cylinder, such as... Figure 1 , Figure 4 As shown, the device includes a bracket 1, a cleaning component 3 is installed on the top inner side of the bracket 1, and a gas cylinder 4 is placed on the bottom inner side of the bracket 1. One side of the cleaning component 3 is driven to lift by a lifting component 2. The bottom of the cleaning component 3 extends into the top opening of the gas cylinder 4 for cleaning. The cleaning component 3 includes a rotating shaft 33. Several cleaning brushes 34 are installed on the outer wall of the rotating shaft 33 along the axial direction. The rotating shaft 33 is driven by a rotary motor 35, which in turn drives the cleaning brushes 34 to perform friction cleaning along the inner wall of the gas cylinder 4.

[0022] In use, the bracket 1 forms an overall support frame, driving the lifting component 2 to move the cleaning component 3 along the axial direction of the gas cylinder 4. Simultaneously, the rotary motor 35 drives the rotating shaft 33 and the cleaning brush 34 to rotate at high speed, causing the cleaning brush 34 to make frictional contact with the inner wall of the gas cylinder 4. Combined with deionized water, this achieves cleaning of the inner wall. This structure upgrades traditional manual cleaning to automated operation, covering the entire inner wall of the gas cylinder 4 through a composite motion of "rotational friction + axial movement," avoiding the unevenness and safety hazards of manual cleaning, and significantly improving cleaning efficiency and standardization.

[0023] In this embodiment, as Figure 2As shown, the bracket 1 includes a support groove 11, which is used to support and limit the bottom end of the gas cylinder 4.

[0024] In use, the inner side of the support groove 11 adopts an arc-shaped structure that matches the bottom of the gas cylinder 4. The vertical positioning and radial limiting of the gas cylinder 4 are achieved through surface contact, preventing the gas cylinder 4 from tipping over or shifting during the cleaning process. This structural design solves the swaying problem caused by the unstable center of gravity of the gas cylinder 4, providing a stable reference for subsequent high-precision cleaning. At the same time, the arc-shaped groove design avoids rigid compression of the bottom of the gas cylinder 4, protecting the integrity of the cylinder body.

[0025] Specifically, such as Figure 2 As shown, a side plate 12 is installed on one side of the outer wall of the support groove 11. The driving lifting component 2 includes a lifting ring 21. The lifting ring 21 can be fitted onto the outside of the gas cylinder 4 and slides with the outer wall of the gas cylinder 4. A lead screw 22 is vertically rotatably installed on one side of the lifting ring 21. A lead screw slider 24 is threaded on the outside of the lead screw 22. The outer wall of the lifting ring 21 is connected and fixed to the lead screw slider 24.

[0026] In use, the side plate 12 serves as the mounting carrier for the driving lifting component 2. The lead screw 22 and the lead screw slider 24 form a helical transmission pair. When the lead screw 22 rotates, it drives the slider 24 and the lifting ring 21 to move vertically. The sliding engagement between the lifting ring 21 and the outer wall of the gas cylinder 4 forms an auxiliary guide, ensuring the coaxiality of the cleaning component 3 and the gas cylinder 4. This structural design utilizes the high-precision characteristics of the lead screw 22 transmission to achieve precise control of the lifting speed and stroke of the cleaning component 3. Combined with the wrap-around design of the lifting ring 21, it balances the radial force during the cleaning process and reduces equipment vibration.

[0027] Furthermore, such as Figure 2 , Figure 3 As shown, a guide block 211 is installed on the side of the lifting ring 21 near the side plate 12, and a guide groove 121 is vertically provided on the side plate 12. The guide block 211 and the guide groove 121 are in a limited sliding fit.

[0028] In use, the guide block 211 and the guide groove 121 form a sliding constraint mechanism, restricting the lifting ring 21 to move only vertically, thus counteracting the radial torque that may be generated during the transmission of the lead screw 22 and preventing the lifting ring 21 from swaying or jamming. This structural design restricts the motion freedom of the lifting ring 21 from the theoretical three X, Y, and Z axes to one Z axis, significantly improving the smoothness of the lifting motion, keeping the contact pressure between the cleaning brush 34 and the inner wall uniform, and reducing localized excessive wear.

[0029] Furthermore, such as Figure 2 As shown, the bottom of the lead screw 22 is driven to rotate by the lead screw motor 23, and the top of the lead screw 22 is mounted with a fixed seat 25 through a bearing. One side of the fixed seat 25 is connected and fixed to the top of the side plate 12.

[0030] In use, the bottom of the lead screw 22 receives power input through the lead screw motor 23, while the top is connected to the fixed base 25 via a bearing, forming a "two-end support" structure. This minimizes the deflection of the lead screw 22 during high-speed rotation. One side of the fixed base 25 is connected and fixed to the top of the side plate 12, further enhancing structural stability. This structural design solves the vibration problem at the cantilever end of the long lead screw 22, and the bearing connection reduces the frictional resistance of the lead screw 22's rotation, extending the equipment's service life.

[0031] Furthermore, such as Figure 4 As shown, the cleaning component 3 also includes a column 31. The bottom end of the column 31 is installed on the top surface of the lifting ring 21. A mounting plate 32 is fixed on one side of the top of the column 31. A rotary motor 35 is installed on the top of the mounting plate 32. The top of the rotating shaft 33 is driven to rotate by the rotary motor 35.

[0032] In use, the column 31 transmits the movement of the lifting ring 21 to the mounting plate 32, making the cleaning component 3 and the lifting ring 21 form a rigid whole that lifts and lowers synchronously. The top of the mounting plate 32 is equipped with a rotary motor 35, providing stable support for the rotary motor 35 and ensuring that the rotation axis of the rotating shaft 33 coincides with the central axis of the gas cylinder 4. This structural design simplifies the force transmission path through modular design, avoids the eccentricity of the cleaning brush 34 caused by looseness between components, and facilitates the disassembly and maintenance of the rotary motor 35, reducing equipment maintenance costs.

[0033] Furthermore, such as Figure 5 As shown, the cleaning brush 34 includes a fixing rod 341. One end of the fixing rod 341 is connected to the outer wall of the rotating shaft 33, and the other end is slidably fitted with a sleeve 342. A spherical brush head 343 is installed at the outer end of the sleeve 342. A spring 344 is provided at the end of the sleeve 342 away from the spherical brush head 343. The spring 344 is fitted on the outside of the fixing rod 341. The end of the spring 344 away from the sleeve 342 abuts against the outer wall of the rotating shaft 33. The spring 344 can drive the spherical brush head 343 to press against the inner wall of the gas cylinder 4, so that the spherical brush head 343 can extend and retract according to the size of the inner wall, and facilitate the shortening of the cleaning brush 34 and its removal from the top opening of the gas cylinder 4.

[0034] In use, the cleaning brush 34 includes a fixed rod 341, a sleeve 342, a spherical brush head 343, and a spring 344. It employs an elastic telescopic structure of "fixed rod 341-sleeve 342-spring 344." The preload of the spring 344 ensures that the spherical brush head 343 always fits against the inner wall. When the diameter of the gas cylinder's inner wall changes, the spring 344 adaptively adjusts the brush head's extension length through telescoping. When entering or exiting the cylinder opening, external force compressing the spring 344 shortens the brush head to a size smaller than the cylinder opening diameter. Compared to the cam-driven rigid structure in prior art document CN119327825A, this adaptive design of the spring 344 achieves compatibility with gas cylinders 4 of different inner diameters. The spherical brush head 343 reduces localized impact on the inner wall and allows for brush head entry and exit without the need for an additional adjustment mechanism.

[0035] It is worth noting that the top opening of the gas cylinder 4 is detachably equipped with a funnel-shaped cover that is wider at the top and narrower at the bottom. Before the bottom of the rotating shaft 33 extends into the top opening of the gas cylinder 4, the funnel-shaped cover is installed on the top opening of the gas cylinder 4, so that the outer end of the cleaning brush 34 is compressed against the inner wall of the funnel-shaped cover and then extends into the gas cylinder 4. Moreover, the funnel-shaped cover can be easily removed from the top opening of the gas cylinder 4.

[0036] This utility model's deionized water cleaning device for the inner wall of gas cylinders achieves automated cleaning of the cylinder's inner wall through a synergistic mechanism of "mechanical transmission + adaptive cleaning." The driving lifting component 2 provides vertical power, causing the cleaning component 3 to move axially along the gas cylinder 4; the rotary motor 35 drives the rotating shaft 33 and cleaning brush 34 to rotate, forming a composite cleaning motion of "rotational friction + axial feed." The spring 344 extension structure of the cleaning brush 34 adapts to changes in the inner wall size of the gas cylinder 4, ensuring that the spherical brush head 343 always fits tightly against the inner wall, achieving efficient cleaning in conjunction with the flushing action of deionized water. The support groove 11 of the bracket 1 and the lifting ring 21 form a double positioning, ensuring the relative stability of the equipment and the gas cylinder 4 during the cleaning process.

[0037] First, the gas cylinder 4 to be cleaned is placed vertically into the support groove 11 of the bracket 1. The arc-shaped support groove 11 limits the bottom of the gas cylinder 4 through surface contact to prevent it from tipping over. At this time, the cleaning component 3 is in the initial high position, and the cleaning brush 34 is in the open state due to the pre-tension of the spring 344. The operator can compress the spring 344 through the funnel cover to shorten the spherical brush head 343 to a size smaller than the diameter of the gas cylinder 4 opening, making it easier to insert later. The lead screw motor 23 is started, and the lead screw 22 rotates under the motor's drive, causing the lead screw slider 24 and the lifting ring 21 to move vertically downwards. The lifting ring 21 is fitted onto the outer wall of the gas cylinder 4 and slides against it. At the same time, the guide block 211 on its side slides synchronously along the guide groove 121 of the side plate 12 to ensure no swaying during the lifting process. The column 31 descends synchronously with the lifting ring 21, causing the mounting plate 32, the rotary motor 35, and the rotating shaft 33 to move downwards, so that the cleaning brush 34 gradually extends into the inner wall from the top opening of the gas cylinder 4 until it reaches near the bottom of the gas cylinder 4. The rotary motor 35 is activated, and the rotating shaft 33 drives the cleaning brush 34 to rotate at high speed, the speed of which can be adjusted according to the degree of soiling. The spherical brush head 343, under the elastic force of the spring 344, fits tightly against the inner wall of the gas cylinder 4, generating friction as it rotates with the shaft 33, removing metal debris, oxide layers, and other impurities adhering to the inner wall. Simultaneously, the lead screw motor 23 drives the lifting ring 21 to rise slowly, causing the cleaning brush 34 to move axially upwards while rotating, forming a spiral cleaning path that covers the entire inner wall of the gas cylinder 4. During the cleaning process, deionized water can be injected into the gas cylinder 4 through the external pipeline to enhance the cleaning effect and promptly remove any loosened impurities.

[0038] When the cleaning brush 34 moves to the vicinity of the gas cylinder 4, the rotary motor 35 is turned off, and the lead screw motor 23 continues to drive the lifting ring 21 to rise. At this time, the spherical brush head 343 contacts the edge of the cylinder opening, and under the pressure of the edge, the spring 344 is compressed, automatically shortening to a size smaller than the diameter of the cylinder opening, and smoothly exiting from the cylinder opening. After the cleaning component 3 returns to its initial high position, the lead screw motor 23 is turned off, and the cleaned gas cylinder 4 can be removed, completing one cleaning cycle.

[0039] Finally, it should be noted that the electronic components in the lead screw motor 23 and other components in this embodiment are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order between each electrical component in the above working principle to complete the electrical connection. All of these are technologies known in the art.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A deionized water cleaning device for the inner wall of a gas cylinder, comprising a support (1), characterized in that: A cleaning component (3) is installed on the top inner side of the bracket (1), and a gas cylinder (4) is placed on the bottom inner side of the bracket (1). One side of the cleaning component (3) is driven to lift by a lifting component (2). The bottom of the cleaning component (3) extends into the top opening of the gas cylinder (4) for cleaning. The cleaning component (3) includes a rotating shaft (33). Several cleaning brushes (34) are installed on the outer wall of the rotating shaft (33) along the axial direction. The rotating shaft (33) is driven by a rotary motor (35), which in turn drives the cleaning brushes (34) to perform friction cleaning along the inner wall of the gas cylinder (4).

2. The deionized water cleaning device for the inner wall of the gas cylinder according to claim 1, characterized in that: The bracket (1) includes a support groove (11) for supporting and limiting the bottom end of the gas cylinder (4).

3. The deionized water cleaning device for the inner wall of the gas cylinder according to claim 2, characterized in that: A side plate (12) is installed on one side of the outer wall of the support groove (11). The driving lifting component (2) includes a lifting ring (21). The lifting ring (21) can be fitted on the outside of the gas cylinder (4) and slides with the outer wall of the gas cylinder (4). A screw (22) is vertically rotatably installed on one side of the lifting ring (21). A screw slider (24) is threaded on the outside of the screw (22). The outer wall of the lifting ring (21) is connected and fixed to the screw slider (24).

4. The deionized water cleaning device for the inner wall of the gas cylinder according to claim 3, characterized in that: The lifting ring (21) is equipped with a guide block (211) on the side near the side plate (12), and a guide groove (121) is vertically provided on the side plate (12). The guide block (211) and the guide groove (121) are in a limited sliding cooperation.

5. The deionized water cleaning device for the inner wall of the gas cylinder according to claim 3, characterized in that: The bottom of the lead screw (22) is driven to rotate by the lead screw motor (23), and the top of the lead screw (22) is mounted with a fixed seat (25) through a bearing. One side of the fixed seat (25) is connected and fixed to the top of the side plate (12).

6. The deionized water cleaning device for the inner wall of a gas cylinder according to claim 3, characterized in that: The cleaning component (3) also includes a column (31), the bottom end of which is installed on the top surface of the lifting ring (21). A mounting plate (32) is fixed on one side of the top of the column (31), and a rotary motor (35) is installed on the top of the mounting plate (32). The top of the rotating shaft (33) is driven to rotate by the rotary motor (35).

7. The deionized water cleaning device for the inner wall of a gas cylinder according to claim 1, characterized in that: The cleaning brush (34) includes a fixed rod (341), one end of which is connected to the outer wall of the rotating shaft (33), and the other end is slidably fitted with a sleeve (342). A spherical brush head (343) is installed on the outer end of the sleeve (342). A spring (344) is provided at the end of the sleeve (342) away from the spherical brush head (343). The spring (344) is fitted on the outside of the fixed rod (341). The end of the spring (344) away from the sleeve (342) abuts against the outer wall of the rotating shaft (33). The spring (344) can drive the spherical brush head (343) to press against the inner wall of the gas cylinder (4), so that the spherical brush head (343) can extend and retract with the size of the inner wall, and facilitate the shortening of the cleaning brush (34) and its removal from the top opening of the gas cylinder (4).

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