Special anti-blocking centrifugal pump impeller structure for solid-containing granular chemical medium

Abstract

This invention discloses a centrifugal pump impeller structure for preventing clogging of chemical media containing solid particles, relating to the technical field of centrifugal pump impeller structures. It includes a centrifugal pump body with a pump chamber and an inlet and outlet chamber communicating with it. Adjustment chambers communicating with the outlet chamber are provided on both outer walls of the centrifugal pump body. A rotating shaft is rotatably mounted on the centrifugal pump body along the axis of the adjustment chamber. A double-suction impeller located within the pump chamber is detachably mounted on the rotating shaft. The double-suction impeller has multiple spirally arranged blades, with inlet channels for media passage formed between adjacent blades. By providing cylindrical protrusions on both sides of the double-suction impeller, and using a first air nozzle corresponding to the inlet channel and a second air nozzle corresponding to the outlet channel, along with a purging component to deliver high-pressure gas, active purging of the inlet and outlet channels is achieved. This allows for real-time cleaning of solid particle deposits on the blade surface, inlet and outlet channels, and in the gaps, preventing impeller clogging.

Description

Technical Field

[0001] This invention relates to the field of centrifugal pump impeller structure technology, and more specifically, to an anti-clogging centrifugal pump impeller structure for chemical media containing solid particles. Background Technology

[0002] In chemical production processes, a large amount of media containing solid particles needs to be transported by double-suction centrifugal pumps. Due to their advantages such as large flow rate, good cavitation resistance, and stable operation, double-suction centrifugal pumps have become the core equipment for transporting such media. As the core rotating component of the centrifugal pump, the impeller's operating status directly determines the pump's transport efficiency and service life.

[0003] Existing double-suction centrifugal pump impellers have the following prominent problems when conveying chemical media containing solid particles: First, solid particles tend to accumulate and adhere to the impeller blade surface and the gap between the hub and the pump cavity. After long-term operation, this can lead to impeller blockage, which not only reduces the pump's conveying efficiency and increases energy consumption, but can also cause impeller jamming, motor overload and burnout in severe cases. Second, traditional impeller anti-clogging structures are mostly passive (such as increasing the blade gap and using wear-resistant coatings), which cannot actively clean the blockage. Moreover, cleaning requires stopping the machine for disassembly, which affects production continuity and increases maintenance costs. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides an impeller structure for a special anti-clogging centrifugal pump for chemical media containing solid particles.

[0005] The technical solution is as follows: A centrifugal pump impeller structure for chemical media containing solid particles is provided, including a centrifugal pump body, which has a pump cavity and an inlet cavity and an outlet cavity communicating with the pump cavity. Adjustment cavities communicating with the outlet cavity are opened on both outer walls of the centrifugal pump body. A rotating shaft is rotatably installed on the centrifugal pump body along the axis of the adjustment cavity. A double suction impeller located in the pump cavity is detachably installed on the rotating shaft. The double-suction impeller has multiple spirally arranged blades inside, and each adjacent blade forms a water inlet channel for the medium to pass through. The multiple blades are connected by a fixed disc that cooperates with the rotating shaft. The double-suction impeller has water outlet channels that communicate with the water outlet cavity on both outer walls corresponding to the regulating chamber. The fixed disc has outwardly protruding cylindrical protrusions on both side walls corresponding to the water outlet channels. Each cylindrical protrusion has an annular air cavity inside. Multiple first air nozzles that cooperate with the corresponding water inlet channels are detachably installed on the arc-shaped outer wall of the cylindrical protrusions. Second air nozzles that cooperate with the corresponding water outlet channels are detachably installed on the side walls of the cylindrical protrusions. A dredging component for conveying high-pressure gas into the annular air cavity is installed on the side wall of the centrifugal pump body.

[0006] Furthermore, the unblocking component includes a connector detachably disposed at the regulating cavity and an air pump disposed on the outer wall of the connector. The connector is used to form a seal at the regulating cavity. An air supply component is rotatably mounted at the connector, one end of which is detachably connected to the annular air cavity. The air pump is used to deliver high-pressure gas through the connector and the air supply component to the interior of the annular air cavity.

[0007] Furthermore, a fixing member is installed between the connector and the regulating cavity. The connector has a first extension that mates with the air supply component near the side wall of the rotating shaft. The side wall of the first extension has a second extension that mates with the rotating shaft. The air supply component has a recess near one end of the connector. The recess is rotatably mounted on the outer wall of the first extension via a first bearing. A groove is provided at one end of the shaft near the connector, and the groove is rotatably mounted on the outer wall of the second extension via a second bearing.

[0008] Furthermore, the air supply component has an air cavity inside, and the connecting component has an air passage that cooperates with the air pump along the axis of the rotating shaft. The outer wall of the first extension has multiple air holes that connect the air cavity and the air passage.

[0009] Furthermore, the outer wall of the cylindrical protrusion has an extension tube sleeved on the outer wall of the rotating shaft, the extension tube has a connection port, the connection port has an opening, the side wall of the air supply component near the double suction impeller is connected to a sleeve, the sleeve is detachably connected to the connection port through the fixing member, and an air passage gap is formed between the sleeve and the extension tube to connect the opening and the air chamber.

[0010] Furthermore, an annular groove is provided on the side wall of the fixing component, and a mating ring portion that mates with the annular groove is provided on the side wall of the gas transmission component.

[0011] Furthermore, a first adjustment assembly for adjusting the size of the adjustment cavity is installed inside the adjustment cavity. The first adjustment assembly includes multiple electric push rods located on the side wall of the connector. The telescopic ends of the multiple electric push rods pass through the fixing member and are fitted with piston discs that cooperate with the inner wall of the adjustment cavity. A first sealing ring is installed on the outer wall of the piston disc. The piston disc has an inner ring, and a second sealing ring that cooperates with the sleeve portion is installed inside the inner ring.

[0012] Furthermore, the annular air cavities inside the cylindrical protrusion are provided for connecting adjacent annular air cavities.

[0013] Furthermore, a controller is installed on the centrifugal pump body, and a pressure sensor is installed on the side wall of the piston disc near the double-suction impeller. The pressure sensor and the electric push rod are both electrically connected to the controller. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the overall components of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the pump cavity of the present invention; Figure 3 This is a three-dimensional cross-sectional view of the present invention; Figure 4 This is a schematic diagram of the explosion of the unblocking component, the first adjusting component, and the double suction impeller of the present invention; Figure 5 This is a cross-sectional schematic diagram of the unblocking component, the first adjusting component, and the double suction impeller of the present invention; Figure 6 This is a partially enlarged schematic diagram of point A in the present invention; Figure 7 This is a cross-sectional schematic diagram of the connector of the present invention; Figure 8 This is a cross-sectional schematic diagram of the gas conveying component of the present invention.

[0015] The reference numerals in the appendix of this invention are as follows: 100. Centrifugal pump body; 101. Pump chamber; 102. Inlet chamber; 103. Outlet chamber; 104. Adjustment chamber; 110. Fixing component; 111. Annular groove; 200. Unblocking assembly; 210. Air supply component; 211. Air chamber; 212. Sleeve section; 213. Recess; 214. Mating ring section; 220. Connecting component; 221. Air passage; 222. Air hole; 230. Air pump; 240. First bearing; 250. Second bearing; 300, double suction impeller; 310, blade; 320, water inlet channel; 330, fixed plate; 331, through hole; 340, water outlet channel; 350, annular air chamber; 351, first air nozzle; 352, second air nozzle; 353, connection port; 354, through port; 360, extension tube; 400, rotating shaft; 410, groove; 500, first adjusting component; 510, electric push rod; 520, piston plate. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0017] The embodiments provided by the present invention will be described in detail below: like Figures 1 to 8As shown, a centrifugal pump impeller structure for chemical media containing solid particles is provided, including a centrifugal pump body 100. The centrifugal pump body 100 has a pump chamber 101 and an inlet chamber 102 and an outlet chamber 103 communicating with the pump chamber 101. Adjustment chambers 104 communicating with the outlet chamber 103 are provided on both outer walls of the centrifugal pump body 100. A rotating shaft 400 is rotatably mounted on the centrifugal pump body 100 along the axis of the adjustment chamber 104. A double suction impeller 300 located in the pump chamber 101 is detachably mounted on the rotating shaft 400. The double-suction impeller 300 has multiple spirally arranged blades 310 inside. A water inlet channel 320 for medium to pass through is formed between adjacent blades 310. A fixed disk 330 that cooperates with the rotating shaft 400 is connected between the multiple blades 310. A water outlet channel 340 communicating with the water outlet cavity 103 is opened on the outer walls of both sides of the double-suction impeller 300 corresponding to the regulating cavity 104. A columnar protrusion protrudes outward on the side walls of the fixed disk 330 corresponding to the water outlet channel 340. An annular air cavity 350 is formed inside the columnar protrusion. Multiple first air nozzles 351 that cooperate with the corresponding water inlet channel 320 are detachably installed on the arc-shaped outer wall of the columnar protrusion. A second air nozzle 352 that cooperates with the corresponding water outlet channel 340 is detachably installed on the side wall of the columnar protrusion. A dredging component 200 for conveying high-pressure gas into the annular air cavity 350 is installed on the side wall of the centrifugal pump body 100.

[0018] It should be noted that by setting cylindrical protrusions on both sides of the double-suction impeller 300, and setting an annular air chamber 350 inside the cylindrical protrusions, and cooperating with the first air nozzle 351 (corresponding to the water inlet channel 320) and the second air nozzle 352 (corresponding to the water outlet channel 340), and cooperating with the unblocking component 200 to deliver high-pressure gas, active purging of the water inlet channel 320 and the water outlet channel 340 can be achieved. Solid particles accumulated on the surface of the blade 310, the water inlet channel 320, the water outlet channel 340 and the gaps can be cleaned in real time, thus avoiding impeller blockage.

[0019] It is understandable that the connection between the water outlet channel 340 and the pump chamber 101 and the regulating chamber 104 ensures smooth medium transportation while providing a reasonable path for high-pressure gas purging, thus balancing transportation efficiency and anti-clogging function.

[0020] The unblocking assembly 200 includes a connector 220 detachably disposed at the regulating chamber 104 and an air pump 230 disposed on the outer wall of the connector 220. The connector 220 is used to form a seal at the regulating chamber 104. An air supply component 210 is rotatably mounted at the connector 220 and detachably connected at one end to the annular air chamber 350. The air supply component 210 is arranged in an annular shape. The air pump 230 is used to deliver high-pressure gas through the connector 220 and the air supply component 210 to the interior of the annular air chamber 350.

[0021] It should be noted that the annular arrangement and rotating installation of the gas supply component 210 cleverly solves the technical problem of supplying gas to the rotating double suction impeller 300, realizing continuous and reliable gas supply from the stationary part to the rotating part. The connecting component 220 not only seals the regulating chamber 104 and prevents media leakage, but also integrates the gas path, making the entire unblocking component 200 compact and reliable.

[0022] Understandably, the connector 220 seals the regulating chamber 104 to prevent high-pressure gas leakage and media seepage, thus ensuring the equipment's operational sealing.

[0023] The gas delivery component 210 is arranged in a ring and is detachably connected to the cylindrical protrusion to ensure that high-pressure gas is evenly delivered into the annular air chamber 350, and then the first air nozzle 351 and the second air nozzle 352 are used to achieve a comprehensive purging effect and improve the unblocking effect.

[0024] Among them, the air pump 230 provides a stable high-pressure air source, which, together with the air conveying component 210 and the connecting component 220, enables the directional delivery of high-pressure gas, ensuring the stable operation of the active unblocking function. At the same time, the detachable design facilitates the inspection and replacement of the unblocking component 200, reducing the difficulty of maintenance.

[0025] like Figures 2 to 5 As shown, a fixing member 110 is installed between the connector 220 and the adjusting cavity 104. The connector 220 has a first extension that mates with the air supply member 210 near the side wall of the rotating shaft 400. The side wall of the first extension has a second extension that mates with the rotating shaft 400. The air supply member 210 has a recess 213 near one end of the connector 220. The recess 213 is rotatably mounted on the outer wall of the first extension through a first bearing 240. A groove 410 is provided at one end of the rotating shaft 400 near the connector 220. The groove 410 is rotatably mounted on the outer wall of the second extension via the second bearing 250.

[0026] The air supply component 210 has an air cavity 211 inside. The connector 220 has an air passage 221 that cooperates with the air pump 230 at the center of the rotating shaft 400. The outer wall of the first extension has a plurality of air holes 222 that connect the air cavity 211 and the air passage 221. The air holes 222 are arranged at intervals along the outer wall of the first extension.

[0027] It should be noted that the coordinated arrangement of the first extension, the second extension, the first bearing 240, and the air delivery component 210 on the fixing component 110 and the connecting component 220 ensures that the air delivery component 210 and the double suction impeller 300 can rotate stably around the axis of the rotating shaft 400, avoiding eccentricity or shaking and ensuring the reliability of air delivery.

[0028] Understandably, the first extension engages with the recess 213 of the air delivery component 210 via a first bearing 240, and the second extension engages with the groove 410 of the rotating shaft 400 via a second bearing 250. This provides stable rotational support for the air delivery component 210 and the rotating shaft 400, enabling the air delivery component 210 to rotate more synchronously with the rotating shaft 400. The bearing configuration reduces rotational resistance and energy consumption.

[0029] The outer wall of the cylindrical protrusion has an extension tube 360 ​​sleeved on the outer wall of the rotating shaft 400. The extension tube 360 ​​has a connection port 353 and a through port 354. The air supply component 210 is connected to a sleeve part 212 on the side wall near the double suction impeller 300. The sleeve part 212 is detachably connected to the connection port 353 through the fixing member 110. An air passage gap is formed between the sleeve part 212 and the extension tube 360, which connects the through port 354 and the air chamber 211.

[0030] It should be noted that an air passage gap is constructed from the gas delivery component 210 (sleeve 212) to the double suction impeller 300 (extension pipe 360) through the extension pipe 360, connection port 353, through port 354 and sleeve 212. This allows the gas in the gas chamber 211 to pass through the air passage gap and enter the annular gas chamber 350 through the through port 354 when the double suction impeller 300 is rotating. This ensures that the high-pressure gas in the gas chamber 211 of the gas delivery component 210 can smoothly enter the annular gas chamber 350 through the through port 354, avoiding gas leakage and ensuring the utilization rate of high-pressure gas.

[0031] Specifically, when the double-suction impeller 300 rotates with the rotating shaft 400, the air supply component 210 connected to the connection port 353 of the double-suction impeller 300 will rotate synchronously with the double-suction impeller 300. Since the air supply component 210 is rotatably mounted on the first extension of the connector 220 through the first bearing 240, the air supply component 210 moves in a circular motion along the outer wall of the first extension. The first extension is provided with multiple air holes 222 that connect the air chamber 211 and the air passage 221. Therefore, even if the air supply component 210 is rotating, the high-pressure gas output by the air pump 230 can be stably input into the air chamber 211 through the air passage 221 and the air holes 222.

[0032] It is understandable that the air passage 221 of the connector 220 cooperates with the air pump 230 to provide a channel for high-pressure gas to enter the gas delivery component 210. The arrangement of multiple air holes 222 ensures that the gas enters the air chamber 211 of the gas delivery component 210 evenly, ensuring smooth and even distribution of high-pressure gas.

[0033] The fixing member 110 has an annular groove 111 on its side wall, and the gas conveying member 210 has a mating ring 214 on its side wall that mates with the annular groove 111.

[0034] It should be noted that the addition of an annular groove 111 and mating ring 214 strengthens the connection and positioning between the gas delivery component 210 and the fixed component 110, which is equivalent to an auxiliary positioning structure, so that the gas delivery component 210 can maintain concentricity and stability with the fixed component 110 during rotation, and prevents connection failure due to vibration.

[0035] like Figures 2 to 4 As shown, a first adjustment component 500 for adjusting the size of the space in the adjustment cavity 104 is installed inside the adjustment cavity 104. The first adjustment component 500 includes a plurality of electric push rods 510 disposed on the side wall of the connector 220. The telescopic ends of the plurality of electric push rods 510 pass through the fixing member 110 and are fitted with piston discs 520 that cooperate with the inner wall of the adjustment cavity 104. A first sealing ring is installed on the outer wall of the piston disc 520. The piston disc 520 has an inner ring, and a second sealing ring that cooperates with the sleeve portion 212 is installed inside the inner ring.

[0036] It should be noted that the electric push rod 510 drives the piston disc 520 to move, which can flexibly adjust the size of the regulating chamber 104, thereby adjusting the pressure inside the regulating chamber 104, adapting to the conveying conditions of chemical media with different solid particle content and different viscosities, and ensuring that effective active unblocking can be achieved under different working conditions.

[0037] Specifically, when 341 performs high-pressure impact unblocking on the inlet channel 320 and the second air nozzle 352 performs high-pressure impact unblocking on the outlet channel 340, the electric push rod 510 synchronously drives the piston disc 520 to move away from the double-suction impeller 300, increasing the capacity of the regulating chamber 104 and providing a certain release space for the high-pressure gas ejected by 341 and the second air nozzle 352. This can increase the discharge volume of the medium in the outlet channel 340 and reduce the damage to the centrifugal pump body 100 when the high-pressure gas is ejected by 341 and the second air nozzle 352. The high-pressure gas ejected by 341 and the second air nozzle 352 is sprayed onto the double-suction impeller 300, which can more effectively impact and remove stubborn blockages.

[0038] Understandably, the installation of the first and second sealing rings enhances the sealing performance of the piston disc 520, prevents media leakage, and ensures the stability of pressure regulation in the regulating chamber 104.

[0039] Through holes 331 are provided between the annular air cavities 350 inside the cylindrical protrusion. The through holes 331 are used to connect adjacent annular air cavities 350, so as to facilitate the simultaneous unblocking of the water outlet channels 340 on both sides.

[0040] A controller is installed at the centrifugal pump body 100, and a pressure sensor is installed on the side wall of the piston disc 520 near the double suction impeller 300. The pressure sensor and the electric push rod 510 are both electrically connected to the controller.

[0041] It should be noted that the setting of pressure sensors enables intelligent unblocking operations. The controller can adjust the pressure based on pressure changes detected by the pressure sensors, for example, the pressure will increase when there is a blockage.

[0042] The pressure sensor detects the pressure in the regulating chamber 104 in real time and transmits the signal to the controller. The controller automatically controls the operation of the air pump 230 and synchronously controls the extension and retraction of the electric push rod 510 according to the preset pressure threshold. This automatically adjusts the position of the piston disc 520 to adjust the size of the regulating chamber 104. When the pressure in the regulating chamber 104 is greater than the preset pressure threshold, the air pump 230 operates to deliver high-pressure gas through the connector 220 and the air delivery component 210 to the annular air chamber 350. Then, 341 performs high-pressure impact to clear the water inlet channel 320 and the second air nozzle 352 to clear the water outlet channel 340. Automatic anti-clogging can be completed without manual intervention. It can be understood that the user can set a small preset pressure threshold to clear the blockage before the centrifugal pump body 100 becomes blocked, thus preventing the formation of blockage from the source.

[0043] It is readily understood that those skilled in the art can combine, split, or reorganize the embodiments provided in this application to obtain other embodiments, all of which do not exceed the protection scope of this application.

[0044] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the embodiments shown are only part of the embodiments of the present invention. The actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. An anti-clogging centrifugal pump impeller structure for chemical media containing solid particles, characterized in that, The centrifugal pump body (100) includes a pump chamber (101) and an inlet chamber (102) and an outlet chamber (103) connected to the pump chamber (101). An adjustment chamber (104) connected to the outlet chamber (103) is provided on both sides of the outer wall of the centrifugal pump body (100). A rotating shaft (400) is rotatably mounted on the centrifugal pump body (100) along the axis of the adjustment chamber (104). A double suction impeller (300) located in the pump chamber (101) is detachably mounted on the rotating shaft (400). The double-suction impeller (300) has multiple spirally arranged blades (310) inside. Each adjacent blade (310) has an inlet channel (320) for the medium to pass through. A fixed disc (330) cooperating with the rotating shaft (400) connects the multiple blades (310). Water outlet channels (340) communicating with the water outlet chamber (103) are opened on both outer walls corresponding to the regulating chamber (104). The fixed disc (330) and the water outlet channels (340) are aligned. Both sides of the corresponding pump body have outwardly protruding cylindrical protrusions, and each cylindrical protrusion has an annular air cavity (350) inside. Multiple first air nozzles (351) that cooperate with the corresponding water inlet channel (320) are detachably installed on the arc-shaped outer wall of the cylindrical protrusion. Second air nozzles (352) that cooperate with the corresponding water outlet channel (340) are detachably installed on the side wall of the cylindrical protrusion. A dredging component (200) for conveying high-pressure gas into the annular air cavity (350) is installed on the side wall of the centrifugal pump body (100).

2. The impeller structure of the special anti-clogging centrifugal pump for chemical media containing solid particles according to claim 1, characterized in that, The unblocking assembly (200) includes a connector (220) detachably disposed at the regulating chamber (104) and an air pump (230) disposed on the outer wall of the connector (220). The connector (220) is used to form a seal at the regulating chamber (104). An air delivery component (210) is rotatably mounted at the connector (220) and detachably connected at one end to the annular air chamber (350). The air pump (230) is used to deliver high-pressure gas through the connector (220) and the air delivery component (210) to the interior of the annular air chamber (350).

3. The impeller structure of the special anti-clogging centrifugal pump for chemical media containing solid particles according to claim 2, characterized in that, A fixing member (110) is installed between the connector (220) and the regulating cavity (104). The connector (220) has a first extension that mates with the air supply member (210) near the side wall of the rotating shaft (400). The side wall of the first extension has a second extension that mates with the rotating shaft (400). The air supply member (210) has a recess (213) near one end of the connector (220). The recess (213) is rotatably mounted on the outer wall of the first extension via a first bearing (240). A groove (410) is provided at one end of the shaft (400) near the connector (220). The groove (410) is rotatably mounted on the outer wall of the second extension via the second bearing (250).

4. The impeller structure of the special anti-clogging centrifugal pump for chemical media containing solid particles according to claim 3, characterized in that, The air delivery component (210) has an air chamber (211) inside. The connector (220) has an air passage (221) that cooperates with the air pump (230) at the center of the rotating shaft (400). The outer wall of the first extension has multiple air holes (222) that connect the air chamber (211) and the air passage (221).

5. The impeller structure of the special anti-clogging centrifugal pump for chemical media containing solid particles according to claim 4, characterized in that, The outer wall of the cylindrical protrusion has an extension tube (360) sleeved on the outer wall of the rotating shaft (400). The extension tube (360) has a connection port (353). The connection port (353) has an opening (354). The air supply component (210) has a sleeve part (212) connected to the side wall near the double suction impeller (300). The sleeve part (212) is detachably connected to the connection port (353) through the fixing component (110). An air passage gap is formed between the sleeve part (212) and the extension tube (360) to connect the opening (354) and the air chamber (211).

6. The impeller structure of the special anti-clogging centrifugal pump for chemical media containing solid particles according to claim 5, characterized in that, The fixing member (110) has an annular groove (111) on its side wall, and the gas delivery member (210) has a mating ring (214) on its side wall that mates with the annular groove (111).

7. The impeller structure of the special anti-clogging centrifugal pump for chemical media containing solid particles according to claim 1, characterized in that, The adjustment cavity (104) is equipped with a first adjustment component (500) for adjusting the size of the adjustment cavity (104). The first adjustment component (500) includes a plurality of electric push rods (510) located on the side wall of the connector (220). The telescopic ends of the plurality of electric push rods (510) pass through the fixing member (110) and are equipped with piston discs (520) that cooperate with the inner wall of the adjustment cavity (104). A first sealing ring is installed on the outer wall of the piston disc (520). The piston disc (520) has an inner ring and a second sealing ring that cooperates with the sleeve part (212) is installed inside the inner ring.

8. The impeller structure of the special anti-clogging centrifugal pump for chemical media containing solid particles according to claim 1, characterized in that, A through hole (331) is provided between the annular air cavities (350) inside the cylindrical protrusion. The through hole (331) is used to connect adjacent annular air cavities (350).

9. The impeller structure of the special anti-clogging centrifugal pump for chemical media containing solid particles according to claim 7, characterized in that, A controller is installed at the centrifugal pump body (100), and a pressure sensor is installed on the side wall of the piston disc (520) near the double suction impeller (300). The pressure sensor and the electric push rod (510) are electrically connected to the controller.

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