Multi-stage adsorption purification device for sulfur hexafluoride decomposition products

Abstract

The invention relates to the technical field of adsorption purification, and discloses a sulfur hexafluoride decomposition product multistage adsorption purification device, which comprises a purification cylinder, a U-shaped pipe arranged on one side of the purification cylinder, an air inlet pipe arranged on the U-shaped pipe, an air outlet pipe arranged on the other side of the purification cylinder, a box cover arranged on the top of the U-shaped pipe, and a dehumidification unit arranged on the U-shaped pipe, the dehumidification unit comprises a flow dividing component and a dehumidification component which are arranged on the U-shaped pipe. According to the sulfur hexafluoride decomposition product multi-stage adsorption purification device, through cooperation of the 180-degree reversing design of the dehumidification cylinder and the two-way air inlet of the U-shaped pipe, the problems that dehumidification is not conducted any more after a traditional dehumidizer is saturated on one side, the whole dehumidification path is shortened, and the dehumidification effect is reduced are solved, and the situation that the humidity gradient is formed in the dehumidification cylinder due to long-term one-side air inlet, and the dehumidification effect is affected is avoided. Aging and caking of a saturated end dehumidizer are accelerated, and the overall service life is shortened. And after the dehumidification cylinder rotates, the area which is not fully adsorbed turns to the airflow channel, so that the overall adsorption capacity of the dehumidizer is improved.

Description

Technical Field

[0001] This invention relates to the field of adsorption and purification technology, and in particular to a multi-stage adsorption and purification device for sulfur hexafluoride decomposition products. Background Technology

[0002] Sulfur hexafluoride (SF6) is widely used in medium and high voltage electrical equipment due to its excellent electrical insulation and arc-quenching properties. However, SF6 in electrical equipment decomposes under the influence of high-power arc discharge and corona discharge, generating a series of toxic decomposition products such as sulfonyl difluoride (SO2F2), thionyl fluoride (SOF2), and sulfur dioxide (SO2). These decomposition products not only corrode equipment and reduce its insulation properties but also pose hazards to human health and the environment. Therefore, effective treatment of SF6 decomposition products is crucial. Existing methods for purifying SF6 decomposition products include physical adsorption and chemical absorption. Alumina, molecular sieves, and activated carbon are commonly used for adsorption, primarily adsorbing polar molecules such as thionyl fluoride, sulfonyl difluoride, and hydrofluoric acid. Activated carbon has a strong adsorption effect on thionyl fluoride and hydrofluoric acid, while molecular sieves have a strong adsorption effect on sulfonyl difluoride. However, humidity affects the purification results when treating SF6 decomposition products; failure to control humidity can lead to additional hazards. The existing technology still has the following drawbacks in use: 1. Moisture in the environment can combine with acidic decomposition products (such as HF and SO2) to form corrosive droplets. This not only exacerbates pore blockage of adsorbents (such as activated carbon and molecular sieves) but also reduces the adsorption capacity of their surface active sites, leading to a decrease in adsorption capacity. Simultaneously, moisture may compete with adsorbents for adsorption, particularly significantly interfering with the selective adsorption of polar decomposition products (such as SOF2), thus reducing purification efficiency. Furthermore, humidity fluctuations affect the reaction rate of alkaline absorbents in chemical absorption methods; high humidity can dilute the absorbent solution, weakening the neutralization effect.

[0003] 2. During dehumidification, as time progresses, the desiccant continuously adsorbs moisture. This results in the desiccant adsorbing a larger amount of moisture on the side that first comes into contact with the gas, while the side farther from the air outlet adsorbs less. Consequently, each time the desiccant is replaced, some will not reach its maximum absorption level, leading to uneven desiccant utilization and waste. Furthermore, long-term unilateral air intake will create a humidity gradient within the dehumidifier cylinder, accelerating the aging and clumping of the desiccant at the saturated end, and shortening its overall lifespan. Summary of the Invention

[0004] Given that existing technologies address the problem that environmental moisture reacts with acidic decomposition products to form corrosive droplets, reducing adsorbent capacity and interfering with selective adsorption, thus affecting chemical absorption, and that uneven adsorption distribution during dehumidification leads to the replacement of some desiccant before reaching maximum absorption levels, resulting in waste, a multi-stage adsorption and purification device for sulfur hexafluoride decomposition products is proposed.

[0005] This application provides a multi-stage adsorption and purification device for sulfur hexafluoride decomposition products, the purpose of which is to solve the adverse effects of humidity on the purification of sulfur hexafluoride decomposition products and improve the adsorption uniformity, thereby reducing the waste of desiccant caused by uneven adsorption.

[0006] The technical solution of this invention is as follows: A multi-stage adsorption and purification device for sulfur hexafluoride decomposition products includes a purification cylinder, a U-shaped tube on one side of the purification cylinder, an air inlet pipe on the U-shaped tube, an air outlet pipe on the other side of the purification cylinder, and a cover on the top of the U-shaped tube. The device is characterized in that it further includes a dehumidification unit disposed inside the U-shaped tube. The dehumidification unit includes a flow distribution component and a dehumidification component mounted on a U-shaped tube. The flow distribution component includes a flow distribution assembly mounted on the U-shaped tube, and a sealing assembly is provided on the flow distribution assembly. The flow divider is used to control the gas to enter the purification cylinder from both ends of the U-shaped tube, and the dehumidification unit is used to dehumidify the gas entering the purification cylinder.

[0007] The diversion assembly includes a sphere disposed inside a U-shaped tube. A sealing plug is also disposed on the U-shaped tube. The sphere abuts against the opposite ends of the air inlet pipe and the sealing plug. Both the opposite ends of the air inlet pipe and the sealing plug are provided with arc-shaped surfaces that fit the sphere. A rotating rod is disposed on the sphere. The top of the rotating rod passes through the rotating contact box cover, and the bottom of the rotating rod passes through to the outside of the U-shaped tube. Two L-shaped holes are also symmetrically distributed on the sphere. The sidewall of the sphere rotates and fits against the inner wall of the U-shaped tube. The sealing assembly includes two movable cavities disposed on the sphere, each containing an L-shaped plate. Both L-shaped plates are fixedly connected to the rotating rod, and the two L-shaped plates can seal the L-shaped hole.

[0008] The diversion component also includes a lifting assembly and a rotating assembly disposed on the top of the lid; The lifting assembly includes an outer cylinder mounted on the lid, a rotating rod slidably connected to the outer cylinder, an iron block mounted on the top of the rotating rod, a slider mounted on the iron block, a groove mounted on the inner side of the outer cylinder, the slider slidably connected to the inner side of the groove, an electromagnet mounted on the top of the inner side of the outer cylinder, and a lifting spring mounted between the electromagnet and the iron block.

[0009] The rotating assembly includes a U-shaped plate disposed on the top of the box cover, a drive motor disposed on the U-shaped plate, and the output shaft of the drive motor being fixedly connected to the top of the outer cylinder.

[0010] The dehumidification component includes a pushing component disposed on the diversion component, a first reset component disposed on the pushing component, dehumidification components disposed inside both ends of the U-shaped tube, and a second reset component disposed on each dehumidification component; Each dehumidification component has an arc-shaped opening directly below it on the U-shaped tube. Multiple screw holes are provided at both ends of the arc-shaped opening on the U-shaped tube. The components are fixed to the arc-shaped opening on the U-shaped tube by multiple screws. The pushing assembly includes a pushing disk mounted on a rotating rod, the pushing disk having a notch, two pushing rods symmetrically arranged on a U-shaped tube, one end of each pushing rod having a roller that is in rolling connection with the pushing disk and the notch, the other end of each pushing rod having a toothed plate, and two gears symmetrically arranged on the U-shaped tube that mesh with the corresponding toothed plates.

[0011] The first reset assembly includes a fixed plate disposed on the push rod, the fixed plate being fixedly connected to the U-shaped tube, and a first reset spring disposed between the push rod and the fixed plate, the first reset spring being sleeved on the push rod.

[0012] The dehumidification component includes two symmetrically distributed T-shaped tubes respectively disposed at both ends of the U-shaped tube. Each of the two T-shaped tubes has a first inclined surface at its opposite end, and a sealing gasket is fixedly connected to each first inclined surface. The T-shaped tubes slide in contact with the inner wall of the U-shaped tube. A dehumidifier cylinder is installed between two adjacent T-shaped pipes. A second inclined surface is provided at both ends of the dehumidifier cylinder. The first inclined surface and the second inclined surface are in contact with each other. The two ends of the dehumidifier cylinder are respectively in contact with two sealing gaskets. A connecting shaft is fixedly installed at the top of the dehumidifier cylinder. The top of the connecting shaft passes through a U-shaped tube and is rotatably inserted into the inner ring sidewall of the gear through a one-way rotating bearing. A humidity sensor is installed in the center of the inner side of each of the two dehumidifier cylinders. The two humidity sensors are humidity sensor A and humidity sensor B, respectively. A controller and two alarms are installed on the purification cylinder. The connecting shaft at the top of the dehumidifier cylinder passes through the inner wall of the rotating connecting U-shaped tube, and a first sealing ring is provided at the connection.

[0013] The disassembly and installation assembly includes an arc-shaped base plate symmetrically distributed on a U-shaped tube. A fixed shaft is rotatably connected to the arc-shaped base plate. The fixed shaft is fixedly connected to the dehumidification cylinder. An insert is also provided on the dehumidification cylinder. A connecting shaft at the top of the dehumidification cylinder is inserted into the inside of the insert.

[0014] The second reset assembly includes multiple guide grooves symmetrically distributed inside a U-shaped tube. Each guide groove has a guide block on its inner side. The guide block is fixedly connected to the corresponding T-shaped tube. A second reset spring is provided between the guide block and the inner wall of the guide groove.

[0015] The method of using the multi-stage adsorption purification device for sulfur hexafluoride decomposition products includes the following steps: S1, humidity sensor A and humidity sensor B monitor humidity and transmit the data to the controller. The air inlet pipe passes SF6 and its decomposed gas to the dehumidification cylinder on one side of the U-shaped pipe. S2. When the airflow humidity reaches the first threshold value X, the controller starts the electromagnet, then starts the drive motor to rotate 180°, and then the controller controls the electromagnet to cut off the power. S3. When the airflow humidity reaches the second threshold value X again, the controller starts the electromagnet, and then starts the drive motor to rotate 180°. After that, the controller controls the electromagnet to be de-energized. S4. When the airflow humidity reaches the first threshold value Y, the controller starts the electromagnet, and then starts the drive motor to rotate 180°. After that, the controller controls the electromagnet to be de-energized, and at the same time the corresponding alarm sounds to remind the operator to replace the dehumidifier containing humidity sensor A. S5. When the airflow humidity reaches the second threshold value Y, the controller starts the electromagnet, and then starts the drive motor to rotate 180°. After that, the controller controls the electromagnet to be de-energized, and at the same time the corresponding alarm sounds to remind the operator to replace the dehumidifier containing the humidity sensor B. S6. Repeat steps S1-S5 to enter the next cycle.

[0016] The purification cylinder is equipped with a multi-stage purification assembly, which includes an activated carbon layer and a molecular sieve layer arranged sequentially from left to right inside the purification cylinder. Both the activated carbon layer and the molecular sieve layer are provided with arc-shaped top plates, which are adsorbed and fixedly connected to the purification cylinder, and a second sealing ring is provided at the connection.

[0017] The beneficial effects of this invention are: 1. By employing a 180-degree reversing design of the dehumidifier cylinder and a U-shaped tube for bidirectional air intake, when the desiccant on the front side of the dehumidifier cylinder is nearly saturated, the gas flow path is first reversed, and the dehumidifier cylinder is rotated, causing the desiccant on both the front and rear sides of the cylinder to rotate. After the gas flow path is reversed again, the desiccant on the rear side comes into contact with the gas first for dehumidification. This ensures that the desiccant on both sides of the dehumidifier cylinder becomes saturated as simultaneously as possible. Compared to the original situation where the desiccant on the front side of the dehumidifier cylinder is saturated, resulting in only the desiccant on the rear side dehumidifying and reducing the dehumidification path, this invention ensures that the dehumidification path is not shortened and that a humidity gradient is not formed inside the dehumidifier cylinder. This also prevents the desiccant on one side from aging and clumping due to saturation, thus shortening the overall service life and improving and ensuring the dehumidification effect.

[0018] 2. An L-shaped plate seals the L-shaped hole during adjustment to prevent direct leakage of untreated gas. Furthermore, the beveled sealing design of the T-tube and dehumidification cylinder, combined with the continuous pressure of the second return spring, ensures seamless airflow at the contact points. This multi-layered sealing mechanism improves the gas treatment pass rate and effectively prevents adsorbent failure caused by undried gas entering the purification cylinder.

[0019] 3. By combining different filter layers, hydrofluoric acid, sulfur dioxide, and thionyl fluoride gas from the decomposition products are first intercepted, and then thionyl difluoride gas from the decomposition products is adsorbed, thus improving the purification accuracy compared to a single adsorption layer. The device's resistance to humidity fluctuations is enhanced, maintaining stable purification efficiency even in relatively humid environments, making it suitable for humid operating conditions such as substations. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention with the lid removed; Figure 3 This is a cross-sectional view of the dehumidification unit of the present invention; Figure 4 This is a schematic diagram of the shunt component structure of the present invention; Figure 5 This is a schematic diagram of the spherical cross-sectional structure of the present invention; Figure 6 This is a schematic diagram of the sealing component structure of the present invention; Figure 7 This is a comparison diagram of the initial state of the push disk of the present invention and after it has been rotated 180 degrees; Figure 8 This is a top perspective view of the rotating state of the pushing disk and the ball in this invention; Figure 9 This is a schematic diagram of the lifting component structure of the present invention; Figure 10 This is a schematic diagram of the dehumidification component structure of the present invention; Figure 11 This is a partial structural diagram of the dehumidification component of the present invention; Figure 12 This is a schematic diagram of the dehumidification component structure of the present invention; Figure 13 This is a top view of the dehumidifier cylinder structure of the present invention; Figure 14 This is a schematic diagram of the multi-stage purification component structure of the present invention.

[0021] In the diagram: 1. Purification cylinder; 11. U-shaped tube; 12. Inlet pipe; 13. Outlet pipe; 14. Cover; 2. Diverting assembly; 21. Sphere; 22. Sealing plug; 23. Rotating rod; 24. L-shaped hole; 3. Sealing assembly; 31. L-shaped plate; 4. Lifting assembly; 41. Outer cylinder; 42. Iron block; 43. Electromagnet; 44. Lifting spring; 5. Rotating assembly; 51. Drive motor; 6. Pushing assembly; 61. Pushing disc; 62. Notch; 63. Pushing... 64. Rod; 65. Toothed plate; 7. Gear; 8. First reset assembly; 9. First reset spring; 10. Dehumidification assembly; 11. T-tube; 12. Sealing gasket; 13. Dehumidification cylinder; 14. Humidity sensor; 15. Disassembly and installation assembly; 16. Arc-shaped base plate; 17. Insert cylinder; 18. Second reset assembly; 19. Guide block; 10. Second reset spring; 10. Multi-stage purification assembly; 11. Activated carbon layer; 11. Molecular sieve layer; 11. Arc-shaped top plate. Detailed Implementation

[0022] Example 1 To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] Example 1, referring to Figures 1-6 This is the first embodiment of the present invention. A multi-stage adsorption and purification device for sulfur hexafluoride decomposition products includes a purification cylinder 1, a U-shaped tube 11 fixedly connected to one side of the purification cylinder 1, an air inlet pipe 12 fixedly connected to the U-shaped tube 11, an air outlet pipe 13 fixedly connected to the other side of the purification cylinder 1, a cover 14 fixedly connected to the top of the U-shaped tube 11, and a dehumidification unit installed inside the U-shaped tube 11. The dehumidification unit includes a flow distribution component and a dehumidification component installed on the U-shaped tube 11. The flow distribution component includes a flow distribution assembly 2 installed on the U-shaped tube 11, and a sealing assembly 3 is installed on the flow distribution assembly 2. The flow divider is used to control the gas to enter the purification cylinder 1 from both ends of the U-tube 11, and the dehumidification unit is used to dehumidify the gas entering the purification cylinder 1. The diversion assembly 2 includes a ball 21 rotatably connected inside a U-shaped tube 11. A sealing plug 22 is also fixedly connected to the U-shaped tube 11. The ball 21 abuts against the opposite ends of the air intake pipe 12 and the sealing plug 22. Both the opposite ends of the air intake pipe 12 and the sealing plug 22 are provided with arc-shaped surfaces that fit the ball 21. A rotating rod 23 is slidably connected to the upper limit of the ball 21. The top of the rotating rod 23 passes through the rotating contact box cover 14, and the bottom of the rotating rod 23 passes through the rotating contact box to the outside of the U-shaped tube 11. A first sealing ring is provided at each rotating connection. Two L-shaped holes 24 are also symmetrically distributed on the ball 21.

[0024] Specifically, the gas containing sulfur hexafluoride decomposition products first enters the U-shaped tube 11 through the inlet pipe 12. The core of the entire purification process lies in the precise control of the gas flow direction by the diversion component 2 and the efficient dehumidification effect of the dehumidification component.

[0025] Rotating the rotating rod 23, which passes through the cover 14 and extends to the outside of the U-shaped tube 11, will cause the ball 21 inside the U-shaped tube 11 to rotate synchronously. Since the ball 21 abuts against the opposite ends of the air inlet pipe 12 and the sealing plug 22, and the arc-shaped surfaces of the opposite ends of the air inlet pipe 12 and the sealing plug 22 are adapted to the ball 21, this structural design ensures good sealing during gas flow and effectively prevents leakage. The two symmetrically distributed L-shaped holes 24 on the ball 21 are key to achieving flow direction switching. When the rotating rod 23 drives the ball 21 to a specific angle of 180°, one of the L-shaped holes 24 will connect with the air inlet pipe 12, at which point the gas will enter one end of the U-shaped tube 11 through this L-shaped hole 24, while the other end of the U-shaped tube 11 is blocked by the ball 21. When it is necessary to switch the gas flow direction, continue rotating the rotating rod 23 to connect the other L-shaped hole 24 with the air inlet pipe 12, and the gas will then enter from the other end of the U-shaped tube 11.

[0026] As the gas flows through the U-shaped tube 11, the dehumidification component dehumidifies the gas. This effectively removes moisture from the gas, preventing it from combining with acidic products (such as HF and SO2) generated from the decomposition of sulfur hexafluoride to form corrosive droplets. This prevents the pores of the adsorbent from becoming clogged and the adsorption capacity of the surface active sites from decreasing, ensuring the efficiency of subsequent purification processes.

[0027] By alternately controlling the gas to enter the purification cylinder 1 from both ends of the U-shaped tube 11, the desiccant in the dehumidification component can be used evenly. Furthermore, the desiccant component can rotate, preventing the problem of excessive desiccant adsorption on the side that first comes into contact with the gas and insufficient adsorption on the side farther from the gas outlet due to prolonged gas intake from the same side, thus avoiding desiccant waste.

[0028] After dehumidification, the gas enters the purification cylinder 1, where the sulfur hexafluoride decomposition products are thoroughly purified. Finally, the purified gas is discharged from the outlet pipe 13, thus achieving effective purification of the sulfur hexafluoride decomposition products.

[0029] Reference Figure 5 and Figure 6 , The sealing assembly 3 includes two movable cavities formed on the sphere 21. Each of the two movable cavities is slidably connected to an L-shaped plate 31. Both L-shaped plates 31 are fixedly connected to the rotating rod 23. The two L-shaped plates 31 can seal the L-shaped hole 24.

[0030] Specifically, when adjusting the diversion component 2, first pull the rotating rod 23 upward, causing the two L-shaped plates 31 to slide upward in the movable cavity, thereby blocking the two L-shaped holes 24 respectively. Then rotate the ball 21 to prevent gas from passing through the L-shaped holes 24 during the rotation of the ball 21, and to prevent gas from passing through the gap of the dehumidification component adjustment when the dehumidification component is adjusted, so that the gas entering the purification cylinder 1 is not dried.

[0031] Reference Figure 3 and Figure 9 , The diversion component also includes an upward lifting assembly 4 and a rotating assembly 5 mounted on the top of the cover 14; The lifting assembly 4 includes an outer cylinder 41 rotatably connected to the lid 14, a rotating rod 23 slidably connected to the outer cylinder 41, an iron block 42 fixedly connected to the top of the rotating rod 23, a slider fixedly connected to the iron block 42, a groove opened on the inner side of the outer cylinder 41, the slider slidably connected to the inner side of the groove, an electromagnet 43 fixedly connected to the top of the inner side of the outer cylinder 41, and a lifting spring 44 fixedly connected between the electromagnet 43 and the iron block 42.

[0032] Specifically, initially, the rotating rod 23 is located at the bottom of the outer cylinder 41 under the action of the lifting spring 44. At this time, the L-shaped plate 31 does not block the L-shaped hole 24. When the ball 21 needs to be rotated, the electromagnet 43 is energized. The electromagnet 43 has a magnetic force that attracts the iron block 42, causing the rotating rod 23 to move upward. The lifting spring 44 is compressed, and at this time, the L-shaped plate 31 blocks the L-shaped hole 24. When the ball 21 stops rotating, the electromagnet 43 is de-energized, the lifting spring 44 will reset, and the iron block 42 and the rotating rod 23 will move downward, and the L-shaped hole 24 will be connected.

[0033] Reference Figure 3 The rotating assembly 5 includes a U-shaped plate fixedly connected to the top of the box cover 14, a drive motor 51 fixedly connected to the U-shaped plate, and the output shaft of the drive motor 51 fixedly connected to the top of the outer cylinder 41.

[0034] Specifically, the drive motor 51 is supported by the U-shaped plate. When the drive motor 51 is started, it drives the outer cylinder 41 to rotate. Since the rotating rod 23 is connected to the outer cylinder 41 by a limit sliding connection, the rotating rod 23 is driven to rotate accordingly.

[0035] Example 2 Reference Figure 7 , Figure 8 and Figures 10-13 This is the second embodiment of the present invention, which differs from the first embodiment in that: The dehumidification component includes a push assembly 6 installed on the diversion assembly 2, a first reset assembly 7 installed on the push assembly 6, and dehumidification assemblies 8 installed in both ends of the U-shaped tube 11, with a second reset assembly 10 installed on each dehumidification assembly 8. Each dehumidification component 8 has an arc-shaped opening directly below it on the U-shaped tube 11. The arc-shaped opening on the U-shaped tube 11 has multiple screw holes at both ends. The disassembly and installation component 9 is fixedly installed on the arc-shaped opening of the U-shaped tube 11 by multiple screws.

[0036] The pushing assembly 6 includes a pushing disk 61 fixedly connected to the rotating rod 23. The pushing disk 61 has a notch 62. Two pushing rods 63 are symmetrically distributed and slidably connected on the U-shaped tube 11. A roller is fixedly installed at one end of the pushing rod 63. The roller is in rolling connection with the pushing disk 61 and the notch 62. A toothed plate 64 is provided at the other end of the pushing rod 63. Two gears 65 are also symmetrically distributed on the U-shaped tube 11. The gears 65 are meshed with the corresponding toothed plates 64.

[0037] Specifically, when the rotating rod 23 is rotated, it drives the push disk 61 to rotate. Initially, the roller rolls on the solid part of the push disk 61, while the push rod 63 remains stationary. When the notch 62 on the push disk 61 moves to the roller, the roller moves into the notch 62, causing the push rod 63 to move, which in turn drives the gear plate 64 to move, causing the gear 65 to rotate. Figure 8 As shown in the top perspective view of the rotating state of the push plate and the ball, the notch 62 is "V" shaped. In the initial state, the notch 62 is located between the rollers of the two push rods 63. The angle between the line connecting the bottom end of the notch 62 and the central axis of the rotating rod 23 and the parallel line formed by the two parallel sides of the two symmetrical L-shaped holes 24 can be 90°. One end of each of the two symmetrical L-shaped holes 24 is connected to the opening of one end of the U-shaped tube. One of the L-shaped holes 24 is connected to the air intake pipe 12, and the other L-shaped hole 24 is blocked by the sealing plug 22. After rotating 180°, as Figure 8 As shown, at this time, one of the L-shaped holes 24 is connected, and the other L-shaped hole 24 is blocked.

[0038] Reference Figure 10 and Figure 11 The first reset assembly 7 includes a fixed plate that is slidably connected to the push rod 63. The fixed plate is fixedly connected to the U-shaped tube 11. A first reset spring 71 is fixedly connected between the push rod 63 and the fixed plate. The first reset spring 71 is sleeved on the push rod 63.

[0039] Specifically, since the physical part of the push plate 61 is connected to the roller in a rolling manner, it squeezes the push rod 63, causing the first return spring 71 to be compressed. When the roller moves to the notch 62, the first return spring 71 will return to its original position, causing the push rod 63 to move.

[0040] Reference Figures 10-13 The dehumidification assembly 8 includes two symmetrically distributed T-shaped tubes 81 that are respectively sealed and slidably connected to both ends of the U-shaped tube 11. Each of the two T-shaped tubes 81 has a first inclined surface at its opposite end. A sealing gasket 82 is fixedly connected to each first inclined surface. A dehumidification cylinder 83 is provided between two adjacent T-shaped tubes 81. A second inclined surface is provided at both ends of the dehumidification cylinder 83. The first inclined surface and the second inclined surface are in contact. The two ends of the dehumidifier cylinder 83 are respectively abutted against two sealing gaskets 82. A connecting shaft is fixedly connected to the top of the dehumidifier cylinder 83. The top of the connecting shaft passes through the U-shaped tube 11 and is rotatably inserted into the inner ring side wall of the gear 65 through a one-way rotating bearing.

[0041] Humidity sensors 84 are fixedly connected to the center of the inner side of each of the two dehumidification cylinders 83. The two humidity sensors 84 are humidity sensor A and humidity sensor B, respectively. A controller and two alarms are fixedly connected to the outer wall of the purification cylinder 1.

[0042] One alarm is electrically connected to humidity sensor A, and is called alarm A; another alarm is electrically connected to humidity sensor B, and is called alarm B.

[0043] Specifically, the humidity sensor 84, drive motor 51, electromagnet 43 and two alarms are all electrically connected to the controller, and the drive motor 51 is set to rotate 180° each time. Electromagnet 43 is model MQ1-5121, manufactured by Shanghai Nengken Electric Co., Ltd. Humidity sensor 84 is model 88MM / DG-WD013, manufactured by Beijing Haifuda Technology Co., Ltd., along with its matching power supply circuit. Drive motor 51 is model SL57S2, manufactured by Shenzhen Dongli Motor Co., Ltd., along with its matching power supply circuit. Controller model CPA101-220, manufactured by Yangzhou Better Automation Equipment Co., Ltd., along with its matching power supply circuit. Alarm model YS-3100, manufactured by Hangzhou Yasong Electronics Co., Ltd., along with its matching power supply circuit.

[0044] SF6 and its decomposed gases first pass through a dehumidifier cylinder 83 containing a humidity sensor A. The humidity sensor A monitors the air humidity inside the dehumidifier cylinder 83 and transmits the data to the controller in the form of an electrical signal for judgment. When the air humidity reaches the threshold X, the controller will control the electromagnet 43 to be energized, attracting the iron block 42 and blocking the L-shaped hole 24. At this time, the gas cannot flow in the U-shaped tube 11. Then, the controller controls the drive motor 51 to start, causing the drive motor 51 to rotate 180 degrees, driving the outer cylinder 41 to rotate, and driving the push disk 61 to rotate through the rotating rod 23.

[0045] A one-way rotary bearing is fixedly sleeved between gear 65 and the connecting shaft. The one-way rotary bearing is model CSK12P and is manufactured by Shandong Yunma Bearing Co., Ltd. When gear 65 rotates, the connecting shaft rotates in one direction due to the action of the one-way rotary bearing. That is, when gear 65 rotates counterclockwise, the connecting shaft can only rotate counterclockwise due to the action of the one-way rotary bearing. However, when gear 65 rotates clockwise, the connecting shaft itself does not rotate due to the action of the one-way rotary bearing.

[0046] When the connecting shaft rotates counterclockwise, it will cause the dehumidifier cylinder 83 containing humidity sensor A to rotate counterclockwise. Under the action of the first and second inclined surfaces, the two T-shaped tubes 81 slide within the U-shaped tube 11, that is, the distance between the two T-shaped tubes 81 increases, thereby allowing the dehumidifier cylinder 83 to rotate between the two T-shaped tubes 81. After the dehumidifier cylinder 83 containing humidity sensor A rotates 180 degrees, both ends of the dehumidifier cylinder 83 abut against the two T-shaped tubes 81 again, completing the change of direction rotation of the dehumidifier cylinder 83 containing humidity sensor A.

[0047] While the dehumidifier cylinder 83 containing humidity sensor A rotates in a different direction, the drive motor 51 drives the ball 21 to rotate 180 degrees synchronously via the rotating rod 23. Then, the controller de-energizes the electromagnet 43, opening the L-shaped hole 24 to allow normal airflow into the dehumidifier cylinder 83 containing humidity sensor B. The dehumidifier cylinder 83 absorbs moisture from the air, and the humidity sensor B inside transmits the data as an electrical signal to the controller for judgment. The controller then re-energizes the electromagnet 43, sealing the L-shaped hole 24, and drives the ball 21 to rotate 180 degrees again, causing the dehumidifier cylinder 83 containing humidity sensor B to complete its rotation in a different direction. Subsequently, the controller de-energizes the electromagnet 43, opening the L-shaped hole 24 to allow normal airflow into the dehumidifier cylinder 83 containing humidity sensor A again. The dehumidifier cylinder 83 absorbs moisture from the gas again. When the humidity sensor A in the dehumidifier cylinder 83 transmits data to the controller, and the controller detects that the gas humidity has reached the threshold value Y (Y > X, and when the gas humidity reaches the value Y, it proves that the desiccant in the dehumidifier cylinder 83 is about to reach saturation), the controller switches the gas flow direction again, allowing the gas to enter the dehumidifier cylinder 83 containing the humidity sensor B, and the controller also activates alarm A to remind the operator to replace the dehumidifier cylinder 83 containing the humidity sensor A. When the humidity sensor B in the dehumidifier cylinder 83 containing the humidity sensor B transmits data to the controller, and the controller detects that the gas humidity has reached the threshold value Y, the controller switches the gas flow direction again, allowing the gas to enter the dehumidifier cylinder 83 containing the humidity sensor A, and the alarm B is activated to remind the operator to replace the dehumidifier cylinder 83 containing the humidity sensor B.

[0048] When alarm B sounds an alarm, the detection phase ends and the process moves to the next detection phase. The controller then returns to its initial judgment logic state.

[0049] This ensures that the two sets of desiccant in the dehumidification cylinder 83 reach saturation almost simultaneously. This prevents the set of desiccant in the dehumidification cylinder 83 from preferentially contacting the humid gas and becoming saturated first when the direction is not reversed. This reduces the dehumidification path of the gas through the dehumidification cylinder 83, improving the dehumidification effect on the gas. It also avoids the formation of a humidity gradient in the dehumidification cylinder 83 due to long-term unilateral air intake, which would accelerate the aging and clumping of the desiccant at the saturated end and shorten the overall service life.

[0050] This allows gas to enter the dehumidifier cylinder 83 containing humidity sensor B from the other end. The desiccant is a porous spherical calcium chloride desiccant, whose main component is calcium chloride. It absorbs moisture through a dual action of physical adsorption and chemical reaction, resulting in a high moisture absorption rate, reaching up to 300% of its own weight. When air enters the dehumidifier cylinder 83 containing humidity sensor B, it is not yet replaced. At this time, the rotating rod 23 rotates 180 degrees clockwise, and the dehumidifier cylinder 83 containing humidity sensor B will not be rotated in the opposite direction. When it is necessary to replace the dehumidifier cylinder 83 containing humidity sensor B, the control electromagnet 43 is energized, starting the drive motor 51, which drives the rotating rod 23 to rotate 180 degrees clockwise. The dehumidifier cylinder 83 containing humidity sensor B will be replaced, and gas will enter from the end of the dehumidifier cylinder 83 containing humidity sensor A in the U-shaped tube 11.

[0051] Reference Figure 10 The disassembly and installation assembly 9 includes an arc-shaped base plate 91 that is symmetrically distributed and detachably connected to the U-shaped tube 11. A fixed shaft is rotatably connected to the arc-shaped base plate 91. The fixed shaft is fixedly connected to the dehumidification cylinder 83. An insert 92 is also fixedly connected to the dehumidification cylinder 83. The connecting shaft is inserted into the inside of the insert 92.

[0052] Specifically, the arc-shaped base plate 91 and the U-shaped tube 11 can be detachably connected by screws. When the dehumidifier cylinder 83 needs to be replaced, loosen the screws and detach the arc-shaped base plate 91 and the U-shaped tube 11.

[0053] Reference Figure 10 and Figure 12 The second reset assembly 10 includes a plurality of guide grooves symmetrically distributed within the U-shaped tube 11. Guide blocks 101 are slidably connected to the inner side of each guide groove. The guide blocks 101 are fixedly connected to the corresponding T-shaped tubes 81. A second reset spring 102 is fixedly connected between the guide blocks 101 and the inner wall of the guide groove.

[0054] Specifically, when the T-shaped tube 81 is compressed and slides within the U-shaped tube 11, the guide block 101 slides inside the guide groove, compressing the second return spring 102. When the compressive force on the T-shaped tube 81 disappears, the T-shaped tube 81 slides back to its original position within the U-shaped tube 11 under the reset action of the second return spring 102, ensuring that the dehumidifying cylinder 83 is in close contact with the two T-shaped tubes 81. The remaining structure is the same as that in Embodiment 1.

[0055] Example 3 Reference Figure 14 This is the third embodiment of the present invention, which differs from the second embodiment in that: The purification cylinder 1 is fixedly equipped with a multi-stage purification component 15. The multi-stage purification component 15 includes an activated carbon layer 151 and a molecular sieve layer 152 fixedly connected in sequence from left to right inside the purification cylinder 1. An arc-shaped top plate 153 is fixedly connected to both the activated carbon layer 151 and the molecular sieve layer 152. The arc-shaped top plate 153 is fixedly connected to the purification cylinder 1, and a second sealing ring is provided at the connection.

[0056] Specifically, the arc-shaped top plate 153 of the multi-stage purification component 15 is a magnet, and the side wall material of the purification cylinder 1 is a corrosion-resistant nickel-based alloy that can be magnetically attracted. The nickel-based alloy model is Monel 400, and the manufacturer is Jiangsu Lichang Metal Products Co., Ltd.

[0057] Two arc-shaped openings are made at the top of the purification cylinder 1, and an activated carbon layer 151 and a molecular sieve layer 152 are installed in sequence. Each arc-shaped top plate 153 is fixedly installed on the arc-shaped opening of the purification cylinder 1 by gravity and magnetic force.

[0058] In this invention, all device housings or inner walls of pipes that come into contact with SF6 decomposition gas can be coated with a layer of polytetrafluoroethylene coating sold by Jiangsu Zhengfulong Anticorrosion Equipment Co., Ltd.

[0059] The gas is purified through an activated carbon layer 151 and further purified through a molecular sieve layer 152. The activated carbon layer 151 (model activated carbon, manufactured by Jiangsu Zhongyuan Activated Carbon Co., Ltd.) primarily adsorbs hydrofluoric acid, sulfur dioxide, and thionyl fluoride gas from the decomposition products. The molecular sieve layer 152 is a molecular sieve (model 13X, manufactured by Shanghai Youxin Molecular Sieve Co., Ltd.) primarily adsorbs thionyl difluoride gas, thus performing multi-stage deep treatment of the gas. The arc-shaped top plate 153 is slidably connected to the purification cylinder 1, allowing for easy disassembly of the arc-shaped top plate 153 and the purification cylinder 1, facilitating the replacement of the activated carbon layer 151 and the molecular sieve layer 152. The remaining structure is the same as in Example 2.

[0060] Based on embodiments 1-3, the working principle of the present invention is as follows: Gas containing sulfur hexafluoride decomposition products enters the U-shaped tube 11 through the inlet pipe 12. When the humidity sensor 84 inside the dehumidifier cylinder 83 detects excessive humidity, it indicates that the dehumidification rate at the inlet end of the dehumidifier cylinder 83 has decreased. The controller first activates the electromagnet 43, which attracts the iron block 42 and drives the rotating rod 23 to lift, causing the L-shaped plate 31 of the sealing component 3 to seal the L-shaped hole 24 on the ball 21. Then, the drive motor 51 is activated, which drives the rotating rod 23 and the ball 21 to rotate through the outer cylinder 41, switching the connection between the L-shaped hole 24 and the U-shaped tube 11 to achieve alternating gas flow. The rotating rod 23 simultaneously drives the push plate 61 to rotate. When the roller slides into the notch 62, the first return spring 71 pushes the push rod 63 to move, which drives the dehumidifier cylinder 83 to rotate 180 degrees through the toothed plate 64, gear 65 and one-way rotating bearing. Under the action of the second return spring 102, the T-shaped tube 81 fits into the dehumidifier cylinder 83, and the calcium chloride desiccant absorbs moisture evenly. After dehumidification, the gas enters the purification cylinder 1 and passes through the activated carbon layer 151 and the 13X molecular sieve layer 152 in sequence to adsorb HF and other products. Finally, it is discharged from the gas outlet pipe 13, completing the purification process.

[0061] Example 4 Reference Figure 1-14 This is the fourth embodiment of the present invention. The method of using a multi-stage adsorption purification device for sulfur hexafluoride decomposition products includes the following steps: S1, humidity sensor A and humidity sensor B monitor humidity and transmit the data to the controller. The air inlet pipe 12 passes SF6 and its decomposed gas into the dehumidification cylinder 83 on one side of the U-shaped pipe 11. S2. When the airflow humidity reaches the first threshold value X, the controller starts the electromagnet 43, and then starts the drive motor 51 to rotate 180°. After that, the controller controls the electromagnet 43 to be de-energized. S3. When the airflow humidity reaches the second threshold value X again, the controller starts the electromagnet 43, and then starts the drive motor 51 to rotate 180°. After that, the controller controls the electromagnet 43 to be de-energized. S4. When the airflow humidity reaches the first threshold value Y, the controller starts the electromagnet 43, and then starts the drive motor 51 to rotate 180°. After that, the controller controls the electromagnet 43 to be de-energized, and at the same time the corresponding alarm sounds to remind the operator to replace the dehumidifier cylinder 83 containing the humidity sensor A. S5. When the airflow humidity reaches the second threshold value Y, the controller starts the electromagnet 43, and then starts the drive motor 51 to rotate 180°. After that, the controller controls the electromagnet 43 to be de-energized, and at the same time the corresponding alarm sounds to remind the operator to replace the dehumidifier cylinder 83 containing the humidity sensor B. S6. Repeat steps S1-S5 to enter the next cycle.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A multi-stage adsorption and purification device for sulfur hexafluoride decomposition products, comprising a purification cylinder (1), characterized in that: The purification cylinder (1) is provided with a U-shaped tube (11) on one side, an air inlet pipe (12) on the U-shaped tube (11), an air outlet pipe (13) on the other side of the purification cylinder (1), and a box cover (14) on the top of the U-shaped tube (11). The characteristic is that it also includes a dehumidification unit installed inside the U-shaped tube (11). The dehumidification unit includes a diversion component and a dehumidification component installed on the U-shaped tube (11). The diversion component includes a diversion assembly (2) installed on the U-shaped tube (11), and a sealing assembly (3) is installed on the diversion assembly (2). The flow divider is used to control the gas to enter the purification cylinder (1) from both ends of the U-tube (11), and the dehumidification component is used to dehumidify the gas entering the purification cylinder (1).

2. The multi-stage adsorption and purification device for sulfur hexafluoride decomposition products according to claim 1, characterized in that: The diversion assembly (2) includes a sphere (21) disposed inside a U-shaped tube (11). A sealing plug (22) is also disposed on the U-shaped tube (11). The sphere (21) abuts against the opposite ends of the air inlet pipe (12) and the sealing plug (22). Both the opposite ends of the air inlet pipe (12) and the sealing plug (22) are provided with arc-shaped surfaces, which are adapted to the sphere (21). A rotating rod (23) is disposed on the sphere (21). The top of the rotating rod (23) passes through and rotates to contact the cover (14). The bottom of the rotating rod (23) passes through and contacts the outside of the U-shaped tube (11). Two L-shaped holes (24) are also symmetrically distributed on the sphere (21). The side wall of the sphere (21) rotates and fits against the inner wall of the U-shaped tube (11). The sealing assembly (3) includes two movable cavities on the sphere (21), each containing an L-shaped plate (31). Both L-shaped plates (31) are fixedly connected to the rotating rod (23), and the two L-shaped plates (31) can seal the L-shaped hole (24).

3. The multi-stage adsorption and purification device for sulfur hexafluoride decomposition products according to claim 2, characterized in that: The diversion component also includes an upward lifting component (4) and a rotating component (5) disposed on the top of the box cover (14). The lifting assembly (4) includes an outer cylinder (41) set on the lid (14), a rotating rod (23) slidably connected to the outer cylinder (41), an iron block (42) set on the top of the rotating rod (23), a slider set on the iron block (42), a sliding groove set on the inner side of the outer cylinder (41), the slider slidably connected to the inner side of the sliding groove, an electromagnet (43) set on the top of the inner side of the outer cylinder (41), and a lifting spring (44) set between the electromagnet (43) and the iron block (42).

4. The multi-stage adsorption and purification device for sulfur hexafluoride decomposition products according to claim 3, characterized in that: The rotating assembly (5) includes a U-shaped plate on the top of the box cover (14), and a drive motor (51) is provided on the U-shaped plate. The output shaft of the drive motor (51) is fixedly connected to the top of the outer cylinder (41).

5. The multi-stage adsorption and purification device for sulfur hexafluoride decomposition products according to claim 4, characterized in that: The dehumidification component includes a pushing component (6) disposed on the diversion component (2), a first reset component (7) disposed on the pushing component (6), and dehumidification components (8) disposed in both ends of the U-shaped tube (11), and a second reset component (10) disposed on each dehumidification component (8). Each dehumidification component (8) has an arc-shaped opening directly below the U-shaped tube (11). The arc-shaped opening on the U-shaped tube (11) has multiple screw holes at both ends. The disassembly and installation component (9) is fixedly installed on the arc-shaped opening of the U-shaped tube (11) by multiple screws. The pushing assembly (6) includes a pushing disk (61) set on the rotating rod (23), a notch (62) provided on the pushing disk (61), two pushing rods (63) symmetrically distributed on the U-shaped tube (11), a roller provided at one end of the pushing rod (63), the roller is in rolling connection with the pushing disk (61) and the notch (62), a toothed plate (64) provided at the other end of the pushing rod (63), and two gears (65) symmetrically distributed on the U-shaped tube (11), the gears (65) meshing with the corresponding toothed plates (64).

6. The multi-stage adsorption and purification device for sulfur hexafluoride decomposition products according to claim 5, characterized in that: The first reset assembly (7) includes a fixing plate disposed on the push rod (63), the fixing plate being fixedly connected to the U-shaped tube (11), and a first reset spring (71) being disposed between the push rod (63) and the fixing plate, the first reset spring (71) being sleeved on the push rod (63).

7. The multi-stage adsorption and purification device for sulfur hexafluoride decomposition products according to claim 5, characterized in that: The dehumidification component (8) includes two T-shaped tubes (81) that are symmetrically distributed at both ends of the U-shaped tube (11). Each of the two T-shaped tubes (81) has a first inclined surface at the opposite end. Each first inclined surface is fixedly connected with a sealing gasket (82). The T-shaped tubes (81) slide in contact with the inner wall of the U-shaped tube (11). A dehumidifier cylinder (83) is provided between two adjacent T-shaped tubes (81). A second inclined surface is provided at both ends of the dehumidifier cylinder (83). The first inclined surface and the second inclined surface are in contact. The two ends of the dehumidifier cylinder (83) abut against two sealing gaskets (82) respectively. A connecting shaft is fixedly installed at the top of the dehumidifier cylinder (83). The top of the connecting shaft passes through the U-shaped tube (11) and is rotatably inserted into the inner ring side wall of the gear (65) through a one-way rotating bearing. A humidity sensor (84) is installed in the center of the inner side of each of the two dehumidifier cylinders (83). The two humidity sensors (84) are humidity sensor A and humidity sensor B, respectively. A controller and two alarms are installed on the purification cylinder (1). The connecting shaft sidewall at the top of the dehumidifier cylinder (83) passes through the inner wall of the rotating connecting U-shaped tube (11), and a first sealing ring is provided at the connection.

8. The multi-stage adsorption and purification device for sulfur hexafluoride decomposition products according to claim 7, characterized in that: The disassembly and installation assembly (9) includes an arc-shaped base plate (91) symmetrically distributed on a U-shaped tube (11). A fixed shaft is rotatably connected to the arc-shaped base plate (91), and the fixed shaft is fixedly connected to the dehumidifier cylinder (83). An insert (92) is also provided on the dehumidifier cylinder (83), and the connecting shaft at the top of the dehumidifier cylinder (83) is inserted into the inside of the insert (92).

9. The multi-stage adsorption and purification device for sulfur hexafluoride decomposition products according to claim 7, characterized in that: The second reset assembly (10) includes multiple guide grooves symmetrically distributed in the U-shaped tube (11). Each guide groove has a guide block (101) on its inner side. The guide block (101) is fixedly connected to the corresponding T-shaped tube (81). A second reset spring (102) is provided between the guide block (101) and the inner wall of the guide groove.

10. A method of using the multi-stage adsorption and purification device for sulfur hexafluoride decomposition products as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S1, humidity sensor A and humidity sensor B monitor humidity and transmit the data to the controller. The air inlet pipe (12) passes SF6 and its decomposed gas to the dehumidification cylinder (83) on one side of the U-shaped pipe (11). S2. When the airflow humidity reaches the first threshold value X, the controller starts the electromagnet (43), then starts the drive motor (51) to rotate 180°, and then the controller controls the electromagnet (43) to cut off the power. S3. When the airflow humidity reaches the second threshold value X again, the controller starts the electromagnet (43), then starts the drive motor (51) to rotate 180°, and then the controller controls the electromagnet (43) to cut off the power. S4. When the airflow humidity reaches the first threshold value Y, the controller starts the electromagnet (43), and then starts the drive motor (51) to rotate 180°. The controller then controls the electromagnet (43) to cut off the power, and at the same time the corresponding alarm sounds a reminder. The operator replaces the dehumidifier cylinder (83) containing the humidity sensor A. S5. When the airflow humidity reaches the second threshold value Y, the controller starts the electromagnet (43), and then starts the drive motor (51) to rotate 180°. The controller then controls the electromagnet (43) to cut off the power, and at the same time the corresponding alarm sounds a reminder. The operator replaces the dehumidifier cylinder (83) containing the humidity sensor B. S6. Repeat steps S1-S5 to enter the next cycle.

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