Solid chute knife-shaped gate valve of aromatic hydrocarbon centrifugal machine

Abstract

The invention discloses an aromatic hydrocarbon centrifuge solid chute knife-shaped gate valve which comprises a connecting flange used for fixedly connecting the knife-shaped gate valve to the inner side of a solid chute in an aromatic hydrocarbon centrifuge. The sealing mechanism is installed on the inner side of the connecting flange, and the sealing performance of the interior of the solid chute is achieved when the valve plate of the knife-shaped gate valve is completely opened and completely closed; the valve body mechanism is mounted in the valve body shell, and a valve plate slides up and down and blocks and discharges the fluid in the solid chute; the valve body mechanism comprises a valve body shell and a protective outer pipe, the protective outer pipe is fixedly connected to the upper portion of the valve body shell, the upper portion of the protective outer pipe is rotationally connected with a hand wheel through a fixing rod, and the inner side of the hand wheel is in threaded connection with a valve rod. Through the arranged prompting mechanism, visual indication of the opening and closing state of the knife-shaped gate valve is achieved, the operation accuracy and convenience are improved, and the stability and safety of fluid control in the solid chute of the aromatic hydrocarbon centrifugal machine are effectively guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of knife gate valves, and particularly to a knife gate valve for a solid chute of an aromatic centrifuge. Background Art

[0002] A knife gate valve, also often referred to as a knife valve, is a gate valve with a gate (valve core) in the shape of a blade. The core design feature lies in this flat, blade-like gate, which is not only used to cut off the fluid passage, but can also effectively cut and sweep away solid particles, fibers, sediment or other impurities accumulated on the valve seat sealing surface (usually the bottom of the valve body) when opened. This structure makes the knife gate valve particularly suitable for handling fluid media in harsh working conditions such as those containing suspended solids, prone to coking, prone to blockage, such as slurries, mud, sewage, slag slurry, pulp, etc., can achieve reliable sealing and cutting, and has good self-cleaning ability, and is widely used in industrial fields such as mining, metallurgy, food, papermaking, sewage treatment, and chemical industry.

[0003] In the process of aromatic production, centrifuges are commonly used for solid-liquid separation, and the separated solid materials need to be transported through a chute. Knife gate valves are widely used to control the opening and closing of materials in such solid chutes due to their good sealing performance and anti-blocking performance. However, in actual applications, in order to ensure the smoothness and safety of the production process, it is often required that the knife gate valve can be quickly and completely closed or opened. Traditional knife gate valves usually do not have a clear switch state indication mechanism, and operators can only judge whether the valve has reached the fully open or fully closed position by feeling the rotation resistance of the handwheel. This judgment method is highly subjective, has low accuracy and is not intuitive enough, bringing inconvenience to the operation and may affect the precise control of the material flow. Summary of the Invention

[0004] An object of the present invention is to provide a knife gate valve for a solid chute of an aromatic centrifuge, so as to solve the problem that traditional knife gate valves usually do not have a clear switch state indication mechanism, and operators can only judge whether the valve has reached the fully open or fully closed position by feeling the rotation resistance of the handwheel. This judgment method is highly subjective, has low accuracy and is not intuitive enough, bringing inconvenience to the operation and may affect the precise control of the material flow.

[0005] A knife gate valve for a solid chute of an aromatic centrifuge according to an embodiment of the present invention includes A connecting flange for fixedly connecting the knife gate valve to the inner side of the solid chute in the aromatic centrifuge; A sealing mechanism installed inside the connecting flange to achieve the sealing of the inside of the solid chute when the valve plate of the knife gate valve is fully opened and fully closed; The valve body mechanism is installed inside the valve body housing, realizing the up-and-down sliding of the valve plate and intercepting and discharging the fluid in the solid chute; the valve body mechanism includes a valve body housing and a protective outer tube, the protective outer tube is fixedly connected to the upper part of the valve body housing, the upper part of the protective outer tube is rotatably connected with a handwheel through a fixing rod, a valve rod is threadedly connected to the inner side of the handwheel, and the lower end of the valve rod is fixedly connected with a valve plate; The prompting mechanism is installed on the upper part of the valve body housing, and is used to prompt the user of the opening and closing state of the knife gate valve by lighting different indicator lights when the valve plate is fully opened and fully closed; the prompting mechanism includes a driving gear, a screw rod, a square tube, a pressing switch and an indicator light, the driving gear is fixedly connected to the lower part of the handwheel through a transmission rod, driven gears are meshed on both sides of the driving gear, the screw rod is threadedly connected to the inner side of the driven gear, the square tube is fixedly connected to the lower end of the screw rod, a control table surface is fixedly connected to the lower part of the side surface of the protective outer tube, and the indicator light and the pressing switch are both installed on the upper surface of the control table surface.

[0006] Preferably, the sealing mechanism includes a flexible sealing ring and a cleaning scraping block, the flexible sealing ring is fixedly connected to the inner side of the connecting flange, and a chute is opened on one side of the flexible sealing ring.

[0007] Preferably, the cleaning scraping block is movably connected to the inside of the chute, a fixing block is fixedly connected to the inner side surface of the valve body housing, and a return spring is installed between the lower surface of the fixing block and the upper surface of the cleaning scraping block.

[0008] Preferably, fixing rings are movably connected to both sides of the flexible sealing ring through compression springs, and the fixing rings are fixedly connected to the inner side of the solid chute.

[0009] Preferably, an upper fixing frame is fixedly connected to the upper part of the side surface of the protective outer tube, and the driven gear is rotatably connected to the upper part of the upper fixing frame.

[0010] Preferably, a lower fixing frame is fixedly connected to the lower part of the side surface of the protective outer tube, and the square tube is slidably connected to the inside of the lower fixing frame.

[0011] Preferably, an upper limit block for limiting the upper sliding distance of the screw rod is fixedly connected to the upper end of the screw rod, and a middle limit block for limiting the lower sliding distance of the screw rod is fixedly connected to the lower end of the screw rod.

[0012] Preferably, a lower limit block for limiting the lower sliding distance of the square tube is fixedly connected to the lower end of the square tube.

[0013] Preferably, there are two sets of driven gears, screws, square tubes, indicator lights and push switches of the prompting mechanism, which are respectively used to display the fully open and fully closed states of the knife gate valve. The push switch is a self-resetting push-type switch.

[0014] Preferably, a pressure relief valve is installed on the side surface of the valve body housing.

[0015] The beneficial effects of the present invention are as follows: Through the provided prompting mechanism of the present invention, when the handwheel of the valve body mechanism rotates, the valve stem connected by internal threads rotates, and slides inward or outward through the thread action, thereby pulling the valve plate to slide inside the connecting flange to intercept or release the fluid in the solid chute of the aromatic centrifuge. When intercepting the fluid, the handwheel rotates and drives the driving gear to rotate through the transmission rod. The driving gear drives the driven gears on both sides to rotate synchronously through the meshing relationship. While the driven gears rotate, one screw is driven to slide downward through the thread relationship, and the driven gear on the other side drives the other screw to slide upward. When the valve plate completely intercepts the fluid, one screw descends to the limit, driving the square tube and the lower limit block to squeeze the push switch on one side. The push switch is triggered to turn on the corresponding indicator light, indicating that the knife gate valve completely intercepts the fluid at this time. When the fluid is completely discharged, the handwheel is rotated in the reverse direction to make the screw on the other side slide downward, and finally the push switch on the other side is pressed to trigger another indicator light to turn on, indicating that the knife gate valve is completely opened at this time, realizing an intuitive indication of the switch state of the knife gate valve, improving the operation accuracy and convenience, and effectively ensuring the stability and safety of the fluid control in the solid chute of the aromatic centrifuge; Through the provided cleaning scraping block of the present invention, when the valve plate slides downward to intercept the fluid, the valve plate is squeezed against the upper surface step of the cleaning scraping block, squeezing the cleaning scraping block downward, so that the cleaning scraping block slides in an arc along the chute inside the flexible sealing ring, and the inside of the chute is cleaned by the cleaning scraping block, effectively preventing particle jamming and ensuring the reliable sealing and complete closing of the knife gate valve; Through the structures such as the fixed ring and the compression spring provided by the present invention, when the valve plate closes the solid chute downward, the valve plate squeezes the flexible sealing rings and the compression springs on both sides. When the valve plate slides upward to open the solid chute, through the reset elastic force of the compression spring and the reset effect of the flexible sealing ring, the flexible sealing rings on both sides are squeezed toward the middle to seal the gap between the two flexible sealing rings, ensuring the effective sealing of the gap in the open state of the valve and improving the overall sealing performance. Description of the Drawings

[0016] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the drawings: Figure 1 Structural schematic diagram of a knife gate valve for the solid chute of an aromatic hydrocarbon centrifuge proposed by the present invention; Figure 2 Of a knife gate valve for the solid chute of an aromatic hydrocarbon centrifuge proposed by the present invention Figure 1 Enlarged view at position A; Figure 3 Stereoscopic schematic diagram of another angle of a knife gate valve for the solid chute of an aromatic hydrocarbon centrifuge proposed by the present invention; Figure 4 Of a knife gate valve for the solid chute of an aromatic hydrocarbon centrifuge proposed by the present invention Figure 3 Enlarged view at position B; Figure 5 Stereoscopic schematic diagram of the valve body mechanism of a knife gate valve for the solid chute of an aromatic hydrocarbon centrifuge proposed by the present invention; Figure 6 Of a knife gate valve for the solid chute of an aromatic hydrocarbon centrifuge proposed by the present invention Figure 5 Enlarged view at position C; Figure 7 Front view of a knife gate valve for the solid chute of an aromatic hydrocarbon centrifuge proposed by the present invention; Figure 8 Cross-sectional view of the internal structure of the valve body housing of a knife gate valve for the solid chute of an aromatic hydrocarbon centrifuge proposed by the present invention; In the figure: 1. Connecting flange; 2. Sealing mechanism; 201. Flexible sealing ring; 202. Chute; 203. Cleaning scraping block; 204. Fixed ring; 205. Extrusion spring; 206. Fixed block; 207. Return spring; 3. Valve body mechanism; 301. Valve body housing; 302. Protective outer tube; 303. Handwheel; 304. Fixed rod; 305. Valve rod; 306. Valve plate; 4. Prompt mechanism; 401. Transmission rod; 402. Driving gear; 403. Driven gear; 404. Upper fixed frame; 405. Lower fixed frame; 406. Screw rod; 407. Upper limit block; 408. Middle limit block; 409. Square tube; 410. Lower limit block; 411. Control table; 412. Press switch; 413. Indicator light; 5. Pressure relief valve. Detailed implementation manners

[0017] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0018] Refer to Figures 1-8 , a knife gate valve for the solid chute of an aromatic hydrocarbon centrifuge, including the following embodiments: Embodiment 1:

[0019] An arene centrifuge solid chute knife gate valve, including a connecting flange 1, which is used to fixedly connect the knife gate valve to the inner side of the solid chute in the arene centrifuge.

[0020] Example Two:

[0021] A sealing mechanism 2, installed inside the connecting flange 1, to achieve the sealing of the inside of the solid chute when the valve plate 306 of the knife gate valve is fully opened and fully closed; the sealing mechanism 2 includes a flexible sealing ring 201 and a cleaning scraping block 203. The flexible sealing ring 201 is fixedly connected to the inside of the connecting flange 1. A chute 202 is provided on one side of the flexible sealing ring 201. The cleaning scraping block 203 is movably connected to the inside of the chute 202. A fixing block 206 is fixedly connected to the inner surface of the valve body housing 301. A return spring 207 is installed between the lower surface of the fixing block 206 and the upper surface of the cleaning scraping block 203. By providing the cleaning scraping block 203, when the valve plate 306 slides downward to intercept the fluid, the valve plate 306 presses against the upper surface step of the cleaning scraping block 203, squeezing the cleaning scraping block 203 downward, so that the cleaning scraping block 203 slides in an arc along the chute 202 inside the flexible sealing ring 201. The inside of the chute 202 is cleaned by the cleaning scraping block 203, effectively preventing particle jamming, ensuring the reliable sealing and full closing of the knife gate valve. Fixed rings 204 are movably connected to both sides of the flexible sealing ring 201 through compression springs 205. The fixed rings 204 are fixedly connected to the inside of the solid chute. By providing structures such as the fixed rings 204 and the compression springs 205, when the valve plate 306 closes the solid chute downward, the valve plate 306 presses the flexible sealing rings 201 and the compression springs 205 on both sides. When the valve plate 306 slides upward to open the solid chute, due to the return elastic force of the compression spring 205 and the return effect of the flexible sealing ring 201, the flexible sealing rings 201 on both sides are squeezed towards the middle to seal the gap between the two flexible sealing rings 201, ensuring the effective sealing of the gap in the open state of the valve and improving the overall sealing performance.

[0022] Example Three:

[0023] A valve body mechanism 3, installed inside the valve body housing 301, to achieve the up and down sliding of the valve plate 306 and intercept and discharge the fluid in the solid chute; the valve body mechanism 3 includes a valve body housing 301 and a protective outer tube 302. The protective outer tube 302 is fixedly connected to the upper part of the valve body housing 301. A handwheel 303 is rotatably connected to the upper part of the protective outer tube 302 through a fixing rod 304. A valve rod 305 is threadedly connected to the inside of the handwheel 303. The lower end of the valve rod 305 is fixedly connected to a valve plate 306. A pressure relief valve 5 is installed on the side surface of the valve body housing 301.

[0024] Example Four:

[0025] The prompting mechanism 4 is installed on the upper part of the valve body housing 301 and is used to prompt the user of the opening and closing state of the knife gate valve by lighting different indicator lights 413 when the valve plate 306 is fully opened and fully closed; the prompting mechanism 4 includes a driving gear 402, a screw rod 406, a square tube 409, a pressing switch 412 and an indicator light 413. The driving gear 402 is fixedly connected to the lower part of the handwheel 303 through a transmission rod 401. Driven gears 403 are meshed on both sides of the driving gear 402. The screw rod 406 is threadedly connected to the inner side of the driven gear 403. The square tube 409 is fixedly connected to the lower end of the screw rod 406. A control table 411 is fixedly connected to the lower part of the side surface of the protective outer tube 302. The indicator light 413 and the pressing switch 412 are both installed on the upper surface of the control table 411;The upper part of the side surface of the protective outer tube 302 is fixedly connected with an upper fixed frame 404. The driven gear 403 is rotatably connected to the upper part of the upper fixed frame 404. The lower part of the side surface of the protective outer tube 302 is fixedly connected with a lower fixed frame 405. The square tube 409 is slidably connected to the inside of the lower fixed frame 405. The upper end of the screw rod 406 is fixedly connected with an upper limit block 407 for limiting the sliding distance of the upper part of the screw rod 406. The lower end of the screw rod 406 is fixedly connected with a middle limit block 408 for limiting the sliding distance of the lower part of the screw rod 406. The lower end of the square tube 409 is fixedly connected with a lower limit block 410 for limiting the sliding distance of the lower part of the square tube 409. The driven gear 403, the screw rod 406, the square tube 409, the indicator lamp 413 and the push switch 412 of the prompting mechanism 4 are all provided in two groups, which are respectively used to display the fully open and fully closed states of the knife gate valve. The push switch 412 is a self-resetting push-type switch. Through the arranged prompting mechanism 4, when the hand wheel 303 of the valve body mechanism 3 rotates, the internally threaded valve stem 305 rotates, and slides inward or outward through the thread action, thereby pulling the valve plate 306 to slide inside the connecting flange 1 to intercept or discharge the fluid in the solid chute of the aromatic hydrocarbon centrifuge. When intercepting the fluid, the hand wheel 303 rotates and drives the driving gear 402 to rotate through the transmission rod 401. The driving gear 402 drives the driven gears 403 on both sides to rotate synchronously through the meshing relationship. While the driven gear 403 rotates, it drives the screw rod 406 on one side to slide downward through the thread relationship, and the driven gear 403 on the other side drives the screw rod 406 on the other side to slide upward. When the valve plate 306 completely intercepts the fluid, the screw rod 406 on one side drops to the limit, driving the square tube 409 and the lower limit block 410 to squeeze the push switch 412 on one side. The push switch 412 is triggered to make the corresponding indicator lamp 413 light up, indicating that the knife gate valve completely intercepts the fluid at this time. When the fluid is completely discharged, the hand wheel 303 is rotated in the reverse direction to make the screw rod 406 on the other side slide downward, and finally the push switch 412 on the other side is pressed to trigger another indicator lamp 413 to light up, indicating that the knife gate valve is completely opened at this time, realizing the intuitive indication of the switch state of the knife gate valve, improving the operation accuracy and convenience, and effectively ensuring the stability and safety of the fluid control in the solid chute of the aromatic hydrocarbon centrifuge.;

[0026] During use, first, the knife gate valve as a whole is fixedly installed inside the solid chute of the aromatic centrifuge through the connecting flange 1. When it is necessary to open the solid chute to allow the material to flow, the operator rotates the handwheel 303 at the upper part of the protective outer tube 302 clockwise. The valve stem 305 threadedly connected to the inside of the handwheel 303 slides upward accordingly. Due to the thread action, the valve stem 305 drives the valve plate 306 fixed to its lower end to slide upward. When the valve plate 306 moves upward, it squeezes the flexible sealing ring 201 toward the middle by pressing the spring 205, causing the flexible sealing rings 201 on both sides to squeeze toward the middle by relying on their own reset elastic force and the elastic force of the pressing spring 205, thus effectively closing the gap between the flexible sealing rings 201 on both sides and ensuring the sealing performance at the gap between the flexible sealing rings 201 on both sides of the chute when the valve is in the open state. At the same time, the rotation of the handwheel 303 drives the driving gear 402 to rotate through the lower transmission rod 401. The driving gear 402 meshes with the driven gears 403 on both sides, causing the two driven gears 403 to rotate synchronously in the opposite direction to the driving gear 402. Due to the opposite thread directions of the two groups of screw rods 406, one of the driven gears 403 drives the screw rod 406 connected to it to slide upward through the thread relationship, while the other driven gear 403 drives the screw rod 406 connected to it to slide downward. The upward-sliding screw rod 406, the square tube 409 and the lower limit block 410 at its lower end rise accordingly. When the valve plate 306 is fully opened to reach the upper limit position, the screw rod 406 and its lower limit block 410 on this side will trigger the push switch 412. After the push switch 412 is triggered, the corresponding indicator light 413 on the control table 411 lights up, indicating to the operator that the knife gate valve is fully opened and the material starts to flow. When it is necessary to close the solid chute to intercept the material flow, the operator rotates the handwheel 303 at the upper part of the protective outer tube 302 counterclockwise. The valve stem 305 slides downward and drives the valve plate 306 to slide downward. When the valve plate 306 moves downward, it squeezes the flexible sealing rings 201 on both sides and the pressing spring 205. The flexible sealing ring 201 deforms to adapt to the contact surface between the valve plate 306 and the inner wall of the chute. At the same time, the valve plate 306 squeezes the upper surface step of the cleaning scraper 203 below the fixed block 206 fixed inside the valve body shell 301, pressing the cleaning scraper 203 downward. At this time, the return spring 207 is stretched, and the cleaning scraper 203 slides in an arc along the chute 202 inside the flexible sealing ring 201 to clean the inside of the chute 202, effectively preventing particulate matter from getting stuck in the chute 202 and ensuring reliable subsequent sealing. The valve plate 306 continues to move downward until it is fully closed. At this time, the rotation of the handwheel 303 drives the driving gear 402 to rotate in the reverse direction through the transmission rod 401. The driving gear 402 drives the driven gears 403 on both sides to rotate synchronously in the opposite direction to the driving gear 402 through the meshing relationship. One of the driven gears 403 drives the screw rod 406 connected to it to slide downward through the thread relationship. When the valve plate 306 is fully closed, the screw rod 406 on this side will slide down to the limit position,The square tube 409 and the lower limit block 410 at its lower end will squeeze the lower push switch 412. After the push switch 412 is triggered, the corresponding indicator light 413 on the control table 411 will light up, prompting the operator that the knife gate valve is fully closed and the material flow is blocked. During the whole process, the pressure relief valve 5 is installed on the side surface of the valve body housing 301 and can be used for pressure relief when necessary. Through this complete design, the precise control of the material flow in the solid chute, reliable sealing and intuitive indication of the valve state are realized.

[0027] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A knife gate valve for the solid chute of an aromatic hydrocarbon centrifuge, characterized in that, Including A connecting flange (1) for fixedly connecting the knife gate valve to the inner side of the solid chute in the aromatic centrifuge; A sealing mechanism (2) installed inside the connecting flange (1) to achieve the sealing of the inside of the solid chute when the valve plate (306) of the knife gate valve is fully opened and fully closed; A valve body mechanism (3) installed inside the valve body housing (301) to achieve the up and down sliding of the valve plate (306) and intercept and discharge the fluid in the solid chute; the valve body mechanism (3) includes a valve body housing (301) and a protective outer tube (302), the protective outer tube (302) is fixedly connected to the upper part of the valve body housing (301), the upper part of the protective outer tube (302) is rotatably connected with a handwheel (303) through a fixing rod (304), the inner side of the handwheel (303) is threadedly connected with a valve rod (305), and the lower end of the valve rod (305) is fixedly connected with a valve plate (306); A prompting mechanism (4) installed on the upper part of the valve body housing (301) to achieve prompting the user of the opening and closing state of the knife gate valve by lighting different indicator lights (413) when the valve plate (306) is fully opened and fully closed; the prompting mechanism (4) includes a driving gear (402), a screw rod (406), a square tube (409), a pressing switch (412) and an indicator light (413), the driving gear (402) is fixedly connected to the lower part of the handwheel (303) through a transmission rod (401), driven gears (403) are meshed on both sides of the driving gear (402), the screw rod (406) is threadedly connected to the inside of the driven gear (403), the square tube (409) is fixedly connected to the lower end of the screw rod (406), a control table surface (411) is fixedly connected to the lower part of the side surface of the protective outer tube (302), and the indicator light (413) and the pressing switch (412) are both installed on the upper surface of the control table surface (411).

2. The knife gate valve of the solid chute of the aromatic hydrocarbon centrifuge according to claim 1, wherein, The sealing mechanism (2) includes a flexible sealing ring (201) and a cleaning scraping block (203), the flexible sealing ring (201) is fixedly connected to the inside of the connecting flange (1), and a chute (202) is opened on one side of the flexible sealing ring (201).

3. The knife gate valve for the solid chute of the aromatic hydrocarbon centrifuge according to claim 2, characterized in that, The cleaning scraping block (203) is movably connected to the inside of the chute (202), a fixing block (206) is fixedly connected to the inner side surface of the valve body housing (301), and a return spring (207) is installed between the lower surface of the fixing block (206) and the upper surface of the cleaning scraping block (203).

4. The knife gate valve of the solid chute of the aromatic hydrocarbon centrifuge according to claim 2, wherein, Both sides of the flexible sealing ring (201) are movably connected with fixing rings (204) through compression springs (205), and the fixing rings (204) are fixedly connected to the inner side of the solid chute.

5. The knife gate valve of the solid chute of the aromatic hydrocarbon centrifuge according to claim 1, wherein An upper fixing frame (404) is fixedly connected to the upper part of the side surface of the protective outer tube (302), and the driven gear (403) is rotatably connected to the upper part of the upper fixing frame (404).

6. The knife gate valve of the solid chute of the aromatic hydrocarbon centrifuge according to claim 1, wherein A lower fixing frame (405) is fixedly connected to the lower part of the side surface of the protective outer tube (302), and the square tube (409) is slidably connected to the inside of the lower fixing frame (405).

7. A knife gate valve for the solid chute of an aromatic hydrocarbon centrifuge according to claim 1, characterized in that, The upper end of the screw rod (406) is fixedly connected with an upper limit block (407) for limiting the upper sliding distance of the screw rod (406), and the lower end of the screw rod (406) is fixedly connected with a middle limit block (408) for limiting the lower sliding distance of the screw rod (406).

8. A knife gate valve for the solid chute of an aromatic centrifuge according to claim 1, characterized in that, The lower end of the square tube (409) is fixedly connected with a lower limit block (410) for limiting the lower sliding distance of the square tube (409).

9. The knife gate valve of the solid chute of the aromatic hydrocarbon centrifuge according to claim 1, characterized in that, The driven gear (403), screw rod (406), square tube (409), indicator light (413) and push switch (412) of the prompting mechanism (4) are all provided in two groups, which are respectively used to display the fully open and fully closed states of the knife gate valve, and the push switch (412) is a self-resetting push switch.

10. The knife gate valve of the solid chute of the aromatic hydrocarbon centrifuge according to claim 1, characterized in that, A pressure relief valve (5) is installed on the side surface of the valve body housing (301).

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