MULTI-STATE SEALING CENTRIFUGAL PUMP

Abstract

This invention relates to the field of centrifugal pump engineering, providing a multi-state sealed centrifugal pump, including a pump body with an internal space, a pump cover fitted on the pump body, the pump cover sealing the pump body and forming an internal chamber within the pump body, the pump body connected to the pump shaft, the pump shaft passing through the pump cover, and a portion of the pump shaft placed within the internal chamber, the remainder extending outside the pump body, a sealing mechanism for when the machine is not stopped is arranged in the internal chamber, and a sealing mechanism for when the machine is stopped is arranged outside the internal chamber, the sealing mechanism for when the machine is stopped consists of a non-rotating ring and a rotating ring fitted on the pump shaft, both the non-rotating ring and the rotating ring have sealing surfaces, the sealing mechanism for when the machine is stopped also includes a magnetic force device used to drive the sealing surface of the non-rotating ring against the sealing surface of the rotating ring.In this invention, the multi-state sealing of the centrifugal pump, with its stopping and non-stop sealing mechanisms working together, enables the centrifugal pump to perform sealing functions both during operation and at rest.

Description

A centrifugal pump with multi-state seal Technical Field

[0001] The present invention relates to the technical field of centrifugal pumps, in particular to a centrifugal pump with multi-state sealing. Background Art

[0002] Centrifugal pumps are commonly used to transport fluids in the chemical, metallurgical, and environmental protection industries. These pumps are plagued by frequent shaft seal burnout, high maintenance requirements due to leakage, low pump efficiency, significant mechanical energy loss, and high energy and medium consumption caused by the use of mechanical seal isolation fluids. This is particularly true when the medium is prone to crystallization, contains solid particles, or is subjected to high temperatures (>150°C), which can easily damage the shaft seal, leading to significant leakage of the process medium and impacting process system stability, safety, and environmental protection. Specifically, when the shaft seal is a dynamic seal, the pump's impeller rotates within the impeller chamber, creating a negative pressure zone that prevents the medium from leaking along the pump shaft beyond the impeller chamber and impeller. While this seal provides an effective seal when the pump is operating, significant leakage occurs when the pump is shut down. Consequently, a combination of a dynamic seal and a shutdown seal is often used. Currently, shutdown seals typically employ packing, coils, or spring-loaded seals, which often exhibit poor sealing performance. This is particularly true when the process medium is prone to crystallization and scaling, which can easily lead to shutdown seal failure, necessitating the use of a mechanical seal isolation fluid.

[0003] Summary of the Invention

[0004] The object of the present invention is to provide a centrifugal pump with multi-state sealing, which can at least solve some of the defects in the prior art.

[0005] To achieve the above-mentioned objectives, an embodiment of the present invention provides the following technical solutions: a multi-state sealed centrifugal pump, comprising a pump body having an internal space, a pump cover installed on the pump body, the pump cover sealing the pump body and forming an inner cavity in the pump body, the pump body being connected to a pump shaft, the pump shaft passing through the pump cover, and a portion of the pump shaft being placed in the inner cavity, and the other portion extending out of the pump body, a non-stop sealing mechanism being provided in the inner cavity, and a shutdown sealing mechanism being provided outside the inner cavity, the shutdown sealing mechanism comprising a non-rotating ring and a rotating ring mounted on the pump shaft, the non-rotating ring and the rotating ring both having sealing surfaces, and the shutdown sealing mechanism also comprising a magnetic component for driving the sealing surface of the non-rotating ring to fit the sealing surface of the rotating ring.

[0006] Furthermore, the dynamic sealing structure includes an impeller with a guide flow channel, an auxiliary impeller chamber located in the inner cavity, an auxiliary impeller is provided in the auxiliary impeller chamber, and the auxiliary impeller chamber is located on a side of the impeller close to the pump cover.

[0007] Furthermore, the impeller is provided with auxiliary blades.

[0008] Furthermore, the non-rotating ring includes a retractable bellows or a spring, and the sealing surface of the non-rotating ring is provided on a side of the bellows or the spring close to the rotating ring.

[0009] Furthermore, the magnetic component is an electromagnetic component.

[0010] Furthermore, the electromagnetic assembly includes an electromagnetic coil sleeved outside the non-rotating ring, the non-rotating ring is arranged on a non-rotating ring mounting plate, and iron that can be absorbed by the electromagnetic coil is installed on the non-rotating ring mounting plate.

[0011] Furthermore, a protection device for monitoring the temperature of the electromagnetic coil is included.

[0012] Furthermore, the rotating ring is mounted on a rotating ring mounting plate.

[0013] Furthermore, the rotating ring mounting plate is ring-shaped.

[0014] Furthermore, a heating device for heating the sealing surface is included.

[0015] Compared with the prior art, the beneficial effects of the present invention are: a centrifugal pump with multi-state sealing, in which the shutdown sealing mechanism and the non-stop sealing mechanism cooperate to achieve the sealing function of the centrifugal pump both when it is running and when it is not running. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic cross-sectional view of a defoaming device (with a self-flushing structure) provided by an embodiment of the present invention from a front view perspective;

[0017] FIG2 is a schematic cross-sectional view of a defoaming device provided by an embodiment of the present invention from a front view perspective (the motor shaft is lengthened and has a self-flushing structure);

[0018] FIG3 is a schematic cross-sectional view of a defoaming device provided by an embodiment of the present invention (with a maintenance-free sealing function) from a front perspective;

[0019] FIG4 is a schematic cross-sectional view of a defoaming device provided by an embodiment of the present invention from a front view perspective (having a long-distance defoaming function);

[0020] FIG5 is a schematic cross-sectional view from a front perspective of a defoaming device provided by an embodiment of the present invention (having a maintenance-free sealing function and a remote defoaming function);

[0021] FIG6 is a schematic diagram of a defoaming device provided by an embodiment of the present invention from a top view;

[0022] FIG7 is a schematic side view of the structure of an electromagnetic filter provided in an embodiment of the present invention;

[0023] FIG8 is a schematic diagram of a top view of the electromagnetic filter provided in an embodiment of the present invention;

[0024] FIG9 is a schematic diagram of the front structure of an electromagnetic filter provided in an embodiment of the present invention;

[0025] FIG10 is a schematic structural diagram of an iron sludge processing subsystem according to an embodiment of the present invention;

[0026] FIG11 is a top view of FIG10 ;

[0027] FIG12 is a schematic structural diagram of an iron sludge collection box provided in an embodiment of the present invention;

[0028] FIG13 is a schematic diagram of a centrifugal pump provided in an embodiment of the present invention;

[0029] FIG14 is a state diagram of the shutdown sealing mechanism provided by an embodiment of the present invention when the machine is shut down;

[0030] FIG15 is a state diagram of a shutdown sealing mechanism during operation provided by an embodiment of the present invention;

[0031] FIG16 is a schematic diagram of a defoaming device (with a shutdown sealing mechanism) provided in an embodiment of the present invention;

[0032] FIG17 is a schematic diagram of a defoaming device (with a self-locking structure) provided in an embodiment of the present invention;

[0033] FIG18 is a schematic diagram of a self-locking structure of a defoaming device provided by an embodiment of the present invention when locked;

[0034] FIG19 is a schematic diagram of a self-locking structure of a defoaming device provided by an embodiment of the present invention when it is not locked. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] Example 1:

[0037] Referring to Figures 1, 2, and 6, an embodiment of the present invention provides a self-flushing structure comprising a flow guide 200 extending to the flushed part and a drive element for driving flushing liquid along the flow guide 200 to the flushed part. The flow guide 200 is hood-shaped, with the cover of the flow guide 200 serving as a flow guide surface. The drive element is located within the cover of the cover. In this embodiment, the hood-shaped flow guide 200 allows the flushed part to be located in the center of the flow guide 200. This allows the flushing liquid driven by the drive element to flow along the cover toward the flushed part, thereby flushing the flushed part. Furthermore, the use of a cover allows for a wider flow guide surface, resulting in a more effective flushing effect. The purpose of flushing can be either decontamination or cooling. Placing the drive element within the cover makes the structure more compact and facilitates the design of a variety of drive types.

[0038] Referring to Figures 1, 2, and 6, the drive element includes a suction-generating impeller 14, mounted directly below the cover. In this embodiment, when the impeller 14 rotates, a certain suction is generated within the cover, drawing the flushing liquid upward. When the rotational speed is high, the drawn-up flushing liquid flows along the direction of the cover and onto the items to be flushed. Of course, this is only one method of driving the flushing liquid. Alternatively, a pump or other suction-generating structure could be used to draw the flushing liquid toward the items to be flushed, which is also feasible and not limited in this embodiment.

[0039] 1, 2 and 6, the cover body includes an arc-shaped plate, which forms the guide surface with a smooth curved surface. In this embodiment, the arc-shaped guide surface can facilitate the flushing liquid to "climb" onto the flushed parts.

[0040] As a further optimization of the above solution, referring to Figures 1, 2, and 6, the curved plate bends away from the drive member. In this embodiment, the curved plate is generally outwardly flared, like a pot lid, facilitating the upward flow and diversion of the rinse liquid. Of course, a reverse curvature is also feasible, and this embodiment does not limit this.

[0041] As an optimized solution for an embodiment of the present invention, please refer to Figures 1, 2, and 6. The curved plates are multiple in number, with adjacent curved plates spliced ​​together. In this embodiment, the housing can be constructed from multiple panels, for example, by welding or other methods of splicing to facilitate transportation and assembly. The housing is preferably sealed during assembly. Of course, a single, integrally formed panel would provide even better results. The splicing methods can include welding, bonding, and other methods.

[0042] As an optimized solution of an embodiment of the present invention, referring to Figures 1, 2, and 6, the cover includes an inclined flat plate, the inclined surface of which serves as the guide surface. In this embodiment, in addition to using a curved plate, an inclined flat plate is also feasible, which can also facilitate the flushing liquid to "climb" up the flat plate to the items to be flushed.

[0043] As an optimized solution of the embodiment of the present invention, please refer to Figures 1, 2 and 6, the flat plate has multiple pieces, and two adjacent flat plates are spliced ​​together. In this embodiment, the flat plate can also be multiple pieces, which can be spliced ​​together or integrally formed.

[0044] As an optimized solution of the embodiment of the present invention, referring to Figures 1, 2, and 6, the housing further includes a liquid reservoir 201, into which the other end of the housing extends. In this embodiment, when the defoaming impeller 13 draws foam into the housing 5 and defoams, some of the liquid medium that strikes the inner wall of the housing 5 enters the liquid reservoir 201, thereby facilitating the supply of liquid medium to the flow guide 200.

[0045] As an optimized solution of the embodiment of the present invention, please refer to Figures 1, 2 and 6. The auxiliary impeller 14 has a flow channel for the liquid medium to pass through. In this embodiment, the auxiliary impeller 14 is also designed with a flow channel for the liquid medium to pass through, which facilitates the rise of the liquid medium.

[0046] Example 2:

[0047] Please refer to Figures 1, 2 and 6. An embodiment of the present invention provides a defoaming device, comprising a housing 5 and a defoaming impeller 13 for eliminating foam. The defoaming impeller 13 is arranged in the housing 5. The housing 5 has a suction section 17 for allowing foam to enter the housing 5. It also includes the self-flushing structure 20 of the above-mentioned embodiment 2, and the self-flushing structure 20 is arranged in the housing 5. In this embodiment, the above-mentioned self-flushing structure 20 is arranged in the housing 5, which enables the defoaming device to have the ability to self-flushed the components that drive the defoaming impeller 13 to rotate, and no external pipeline is required for flushing, which reduces the difficulty of installation and saves energy. Preferably, the housing 5 can be cylindrical or rectangular. Preferably, the defoaming impeller 13 can be one or more combined impellers, and the impeller can be an axial flow type impeller or a fan type impeller. In addition, the impeller can be a plate-type welded impeller or a cast impeller. The suction section 17 is welded with a bell mouth below the suction pipe to expand the suction area and improve the suction efficiency.

[0048] As an optimized solution of an embodiment of the present invention, please refer to Figures 1, 2, and 6. The motor 10 further includes a motor 10 disposed on the housing 5. The motor shaft 100 of the motor 10 extends into the housing 5, and the defoaming impeller 13 is mounted on the motor shaft 100. In this embodiment, when the driving member is a secondary impeller 14, the secondary impeller 14 is also mounted on the motor shaft 100. The component that drives the defoaming impeller 13 to rotate can be the motor 10, and both the secondary impeller 14 and the defoaming impeller 13 can be driven to rotate by the motor 10. After the defoaming impeller 13 removes foam, the secondary impeller 14 also draws the liquid medium upward to the guide member 200. The liquid medium on the guide member 200 flows onto the items to be rinsed, then flows down again, and then remixes with the defoamed liquid medium below, which is drawn up again, thereby achieving self-circulating rinsing of the items to be rinsed. Preferably, the motor 10 can be one of an industrial frequency motor 10, a variable frequency motor 10, an explosion-proof or non-explosion-proof type, or a high-efficiency or standard type. The motor shaft 100 is clamped in one step and the whole shaft is machined in one step. This part successfully solves the problem of reliable connection between the motor 10 and the defoaming impeller 13, with good concentricity and reliable and stable operation of the device.

[0049] 1, 2 and 6, the embodiment of the present invention further includes a sealing structure 18 for sealing the motor shaft 100. In this embodiment, the sealing structure 18 is used to seal the motor 10 to prevent liquid from entering the motor 10 and causing damage to the motor 10.

[0050] To further optimize the above technical solution, referring to Figures 1, 2, and 6, the sealing structure 18 is a mechanical sealing structure 18, and the flow guide 200 extends to the mechanical sealing structure 18. In this embodiment, the sealing method can adopt the mechanical sealing structure 18. The mechanical sealing structure 18 is the most effective and stable sealing method. However, mechanical seals require flushing and cooling. In this embodiment, the defoamed medium can be flowed along the flow guide 200 to the mechanical sealing structure 18 for cooling. The aforementioned flushed part can be the mechanical sealing structure 18. This eliminates the need for fresh water for cooling, significantly saving production costs. In addition, the flow guide 200 covers the medium and can also cooperate with the sealing structure 18 to provide a certain sealing effect. Because it not only achieves self-circulating flushing, but also guides the liquid to flow downward, completely isolating the foam flow and liquid flow in the container from the motor 10. The foam flow or liquid flow caused by the positive or negative pressure generated by the foaming medium in the container will not damage the motor 10. Preferably, the mechanical seal can include a non-container mechanical seal or a container mechanical seal. Its function is to effectively seal and isolate the foam flow and the medium flow from entering the motor 10 or the external environment along the shaft.

[0051] To further optimize the above technical solution, referring to Figures 1, 2 and 6, a sealing box 19 is provided outside the mechanical sealing structure 18, and the flow guide 200 passes through the sealing box 19 to the mechanical sealing structure 18. Using the sealing box 19 outside the mechanical sealing structure 18 can improve the sealing effect.

[0052] As an optimization scheme of an embodiment of the present invention, please refer to Figures 1, 2 and 6. A guide box 16 is provided at the bottom of the shell 5. In this embodiment, the motor 10 drives the defoaming impeller 13 to rotate through the motor shaft 100, the sealing structure 18 and the auxiliary impeller 14. After the defoaming impeller 13 rotates, a suction force is formed. The foam generated on the surface of the container is sucked into the inlet of the defoaming impeller 13 by the suction section 17 arranged along the shape of the container. The defoaming impeller 13 utilizes the shear force and compression effect generated by the impeller to break the bubbles, separate the gas and liquid, and the liquid is thrown toward the shell 5 by the inertial force. The liquid generated after defoaming flows along the shell 5 into the guide box 16. The guide box 16 further dissipates the energy of the fluid after defoaming and disperses it into the container to avoid conflict with the foam flow. Preferably, the guide box 16 is a plate-type welded multi-block threaded structure. A circle of cylinders is welded on the upper surface of the suction section 17, and the cylinder is connected to the shell 5 by threads.

[0053] As an optimization scheme of an embodiment of the present invention, please refer to Figures 1, 2 and 6. The above-mentioned liquid storage tank 201 is arranged on the shell 5. When the defoaming impeller 13 attracts foam into the shell 5 and defoams, some of the liquid medium that hits the inner wall of the shell 5 will enter the liquid storage tank 201. This part of the liquid medium will flow along the guide member 200 to the sealing structure 18 to flush and cool the sealing structure 18.

[0054] As an optimized solution of the embodiment of the present invention, please refer to Figures 1, 2 and 6, which also includes a mouth ring 15 provided at the suction section 17. In this embodiment, the mouth ring 15 is added between the suction port and the inner cavity of the defoaming impeller 13, thereby improving the sealing of the suction port of the defoaming impeller 13, reducing wear, improving the suction force of the defoaming impeller 13, preventing internal circulation, and increasing the efficiency of the defoaming impeller 13.

[0055] As an optimized solution for an embodiment of the present invention, referring to Figures 1, 2, and 6, the motor 10 is mounted on a mounting base 11, which is located above the housing 5. Mounting base 11 is mounted on the top of the container, sized to match the container. The motor 10 is directly connected to mounting base 11, reducing the weight and volume of the device. Preferably, mounting base 11 can be a circular flange, a square flange, or a steel frame.

[0056] As an optimization scheme of an embodiment of the present invention, please refer to Figures 1, 2 and 6. The end of the motor shaft 100 away from the motor 10 is provided with a sliding bearing 6. In this embodiment, when the foam to be absorbed is in a deeper position, it is necessary to lengthen the motor shaft 100 or lengthen the impeller connecting shaft 12, and a sliding bearing 6 can be provided at the shaft end to ensure that the shaft and the parts on the shaft operate stably and reliably. Preferably, the sliding bearing 6 includes a housing, a wear-resistant bushing and a shaft sleeve, and the sliding friction between the bushing and the shaft sleeve realizes the functions of shock absorption and support, and balances the radial force generated during operation or unstable rotation of the long shaft. This part is fixed by welding a bracket in the suction section 17.

[0057] Example 3:

[0058] Referring to Figures 3 and 6, an embodiment of the present invention provides a maintenance-free defoaming device. This device is modified from the above-mentioned defoaming device by eliminating the self-flushing structure 20 and adding a maintenance-free sealing assembly 30. Specifically, the device includes a housing 5, a defoaming impeller 13 for eliminating foam, and a motor 10 for driving the defoaming impeller 13 to rotate. The defoaming impeller 13 is disposed within the housing 5 and is coaxially connected to a motor shaft 100 of the motor 10. The housing 5 has a suction section 17 for allowing foam to enter the housing 5. The device also includes a maintenance-free sealing assembly 30 for sealing the motor shaft 100. The maintenance-free sealing assembly 30 is disposed on a side of the defoaming impeller 13 away from the suction section 17. In this embodiment, the use of the maintenance-free sealing assembly 30 can prevent liquid medium from entering the motor 10 and burning the motor 10.

[0059] As an optimized solution of an embodiment of the present invention, referring to Figures 3 and 6 , the maintenance-free seal assembly 30 includes a dynamic and static ring and a weight block that can drive the dynamic and static rings to contact the motor shaft 100 when at rest. In this embodiment, when the device stops operating, the weight block can force the dynamic and static rings to contact the motor shaft 100 to achieve a stop seal.

[0060] Further optimizing the above solution, referring to Figures 3 and 6, further includes an auxiliary impeller 14 capable of generating pressure in a direction opposite to that of the defoaming impeller 13, and the auxiliary impeller 14 is mounted on the motor shaft 100. In this embodiment, when the device is operating, the gravity block rotates and drives the dynamic and static rings, causing the dynamic and static rings to separate from the motor shaft 100. At this time, the auxiliary impeller 14 operates. Since its pressure direction is opposite to that generated by the defoaming impeller 13, it prevents high-pressure medium from leaking into the sealed chamber where the maintenance-free sealing device is located during device operation. The auxiliary impeller 14 used in conjunction with the auxiliary impeller 14 also serves to balance the axial force.

[0061] As for other structures of the defoaming device, please refer to the above embodiments and will not be described again here.

[0062] Example 4:

[0063] Please refer to Figures 4 and 6. An embodiment of the present invention provides a long-distance defoaming device, including a housing 5, a defoaming impeller 13 for eliminating foam, and a motor 10 for driving the defoaming impeller 13 to rotate, wherein the defoaming impeller 13 is arranged in the housing 5, and the housing 5 has a suction section 17 for foam to enter the housing 5, and further includes an impeller connecting shaft 12, wherein the defoaming impeller 13 is arranged on the impeller connecting shaft 12, and the impeller connecting shaft 12 is coaxially connected to the motor shaft 100 of the motor 10 through a coaxial sealing component 40. In this embodiment, when the defoaming distance is relatively far, an impeller connecting shaft 12 can be added for the installation of the defoaming impeller 13, thereby achieving a better defoaming effect. At this time, the impeller connecting shaft 12 needs to be coaxially connected to the motor shaft 100, and the coaxial sealing component 40 can play a sealing role to prevent the liquid medium from entering the motor 10 and burning the motor 10.

[0064] As an optimized solution of an embodiment of the present invention, referring to Figures 4 and 6 , the coaxial seal assembly 40 includes a coupling 400, through which the impeller connecting shaft 12 and the motor shaft 100 are coaxially connected. In this embodiment, the coupling 400 connects the motor shaft 100 and the impeller connecting shaft 12, transmitting the power and torque of the motor 10 to the shaft and its components. It also serves as a safety device, preventing liquid media from flowing along the shaft into the motor 10 and causing burns.

[0065] To further optimize the above solution, see Figures 4 and 6 . The coaxial seal assembly 40 also includes a bearing 401 for supporting the motor shaft 100 and the impeller connecting shaft 12. In this embodiment, the bearing 401 can be an angular contact ball bearing 401 or a deep groove ball bearing 401, capable of balancing both axial and radial forces. This component supports the shaft, reduces friction and wear, and reduces noise.

[0066] As a further optimization of the above solution, referring to Figures 4 and 6 , the coaxial seal assembly 40 further includes a bearing gland 402 for securing the axial position of the bearing 401. The bearing gland 402 is located between the coupling 400 and the bearing 401. In this embodiment, the gland is equipped with an oil cup or oil filling line and valve to facilitate lubricating oil replenishment. The inner bore is equipped with one or a combination of a packing seal, a skeleton oil seal, a labyrinth seal, and a dry gas seal to prevent oil leakage.

[0067] As an optimized solution of the embodiment of the present invention, referring to Figures 4 and 6 , a bearing sealing housing 403 is provided outside the impeller connecting shaft 12. In this embodiment, the bearing sealing housing 403 cooperates with the bearing gland 402 to isolate the bearing 401 from the external environment to form a sealed space, while also supporting the bearing 401 to enable stable and reliable operation. The bearing sealing housing 403 can be located inside the container, in contact with the medium and effectively isolating it, or it can be located outside the container.

[0068] As an optimized solution of the embodiment of the present invention, referring to Figures 4 and 6 , a sealing structure 18 is also included for sealing. The sealing structure 18 is disposed on a side of the coaxial sealing assembly 40 near the suction section 17. In this embodiment, in addition to the coaxial sealing assembly 40 described above, the sealing structure 18 can also be used for sealing. The specific sealing sequence is that the sealing structure 18 performs the sealing first. If the coaxial sealing assembly 40 fails to block the liquid medium, the sealing structure 18 can also block the liquid medium from the motor 10.

[0069] To further optimize the above solution, please refer to FIG. 4 and FIG. 6 . The sealing structure 18 may adopt the sealing structure 18 in the above embodiment 2, and its specific structure will not be described in detail here.

[0070] As for other structures of the defoaming device, please refer to the above embodiments and will not be described again here.

[0071] Embodiment 5:

[0072] Please refer to Figures 5 and 6. An embodiment of the present invention provides a remote maintenance-free mechanical defoaming device, which is composed of the maintenance-free seal involved in Example 3 and the remote defoaming involved in Example 5. The defoaming device has the functions of maintenance-free sealing and remote defoaming. Specifically, the device includes a housing 5, a defoaming impeller 13 for eliminating foam, and a motor 10 for driving the defoaming impeller 13 to rotate. The defoaming impeller 13 is arranged in the housing 5, and the housing 5 has a suction section 17 for foam to enter the housing 5. It also includes an impeller connecting shaft 12, and the defoaming impeller 13 is arranged on the impeller connecting shaft 12. The impeller connecting shaft 12 is coaxially connected to the motor shaft 100 of the motor 10 through a coaxial sealing assembly 40. A maintenance-free sealing assembly 30 is also provided on the side of the coaxial sealing assembly 40 close to the suction section 17. In this embodiment, when the defoaming distance is relatively far, an impeller connecting shaft 12 can be added for the installation of the defoaming impeller 13, thereby achieving a better defoaming effect. At this time, the impeller connecting shaft 12 needs to be coaxially connected to the motor shaft 100. The coaxial sealing assembly 40 can play a sealing role to prevent the liquid medium from entering the motor 10 and burning the motor 10. At the same time, the maintenance-free sealing assembly 30 is also used to achieve a double sealing effect, thereby greatly improving the sealing performance and making the device maintenance-free.

[0073] As an optimization solution of the embodiment of the present invention, please refer to Figures 5 and 6. The coaxial sealing assembly 40 and the maintenance-free sealing assembly 30 can be referred to in Example 3 and Example 4, and will not be described in detail here.

[0074] Example 6:

[0075] Please refer to Figures 1 to 6. An embodiment of the present invention provides a defoaming device. The defoaming device of this embodiment is a variation of the embodiment 2. A good sealing effect can also be achieved by removing the self-flushing structure 20. Specifically, the defoaming device includes a housing 5, a defoaming impeller 13 for eliminating foam, and a motor 10 for driving the defoaming impeller 13 to rotate. The defoaming impeller 13 is arranged in the housing 5. The housing 5 has a suction section 17 for allowing foam to enter the housing 5. It also includes an auxiliary impeller 14 that can generate a pressure direction opposite to that of the defoaming impeller 13. The auxiliary impeller 14 is mounted on the motor shaft 100, and the auxiliary impeller 14 is located on the side of the defoaming impeller 13 close to the motor 10. In this embodiment, since the pressure direction of the auxiliary impeller 14 is opposite to the pressure direction generated by the defoaming impeller 13 when it is working, it can prevent the high-pressure medium from leaking into the motor 10 and burning the motor 10. In addition, the auxiliary impeller 14 can also play a role in balancing the axial force.

[0076] As for other structures of the defoaming device, please refer to the above-mentioned embodiment 2, which will not be described here in detail.

[0077] Embodiment seven:

[0078] Please refer to FIG7 . An embodiment of the present invention provides an alkali solution circulation tank, and the defoaming device in the above embodiments is used to defoam the reaction medium in the alkali solution circulation tank.

[0079] As an optimization solution of an embodiment of the present invention, please refer to FIG7 , the alkali solution circulation tank also includes an alkali solution concentration online detection system and an alkali solution concentration online detection method corresponding to the system. Specifically:

[0080] As shown in FIG7 , an online detection method for alkali solution concentration includes the following steps:

[0081] S1, obtain the alkali solution concentration and the corresponding alkali solution surface tension, take the alkali solution concentration as the dependent variable y, the corresponding alkali solution surface tension as the independent variable x, and establish the alkali solution concentration prediction model y=a0+a1x+a2x 2 +…+a n x n ; Among them, a0, a1 to a n are model parameters;

[0082] S2, training the alkali solution concentration prediction model until the predicted alkali solution concentration deviation is controlled within an allowable range;

[0083] S3, obtain the real-time alkali solution surface tension as the independent variable x s , substitute the trained alkali solution concentration prediction model to obtain the corresponding real-time alkali solution concentration prediction value y s ;

[0084] S4, according to the real-time alkali solution concentration predicted value y s , adjust the real-time alkali solution concentration to the alkali solution concentration set value.

[0085] In some embodiments, the supply end may specifically be a compressed air station.

[0086] Different from the off-line sampling and testing method used in the related art for alkali solution concentration detection, the technical solution disclosed in the present invention realizes online detection of alkali solution concentration. On the basis of online detection of alkali solution concentration, automatic control of alkali solution concentration is realized to ensure the stability of alkali solution concentration, the cleaning quality of strip steel is guaranteed, and hysteresis is small. The cleaning ability of alkali solution is represented by the surface tension of alkali solution, which has good representativeness. The relationship between alkali solution concentration and alkali solution surface tension is established by soft measurement method, and the alkali solution concentration prediction model can continuously learn through training, thereby achieving very high accuracy. In addition, the original alkali solution, desalted water or waste alkali solution can be replenished based on the alkali solution concentration, and the alkali solution concentration fluctuates little.

[0087] It should be noted that the technical solution of the present disclosure does not limit the order of steps S1, S2, S3, and S4. That is, step S1 can be executed before steps S2, S3, and S4, or after steps S2, S3, and S4, or simultaneously with steps S2, S3, and S4. The order of the steps is also not limited.

[0088] In a specific implementation scenario:

[0089] First, the surface tension data of alkali solution at different alkali solution concentrations are collected and stored in the alkali solution concentration online detection and automatic control computer. The alkali solution concentration data are collected through offline sampling and testing. The alkali solution concentration is used as the dependent variable y and the alkali solution surface tension is used as the independent variable x. The alkali solution concentration prediction model y = a0 + a1x + a2x is established. 2 +…+a n x n After accumulating a certain amount of sample data of alkali solution concentration and alkali solution surface tension, the least squares method is used to perform regression training based on the sample data of alkali solution concentration and alkali solution surface tension until the deviation of the predicted alkali solution concentration is controlled within the allowable range.

[0090] Secondly, the real-time data of the alkali solution surface tension is collected through the alkali solution surface tension online detector, and the trained alkali solution concentration prediction model is called to calculate the real-time alkali solution concentration.

[0091] Finally, the alkali solution concentration automatic control module is run. This module compares the set alkali solution concentration data with the real-time alkali solution concentration data. Using the electrolyte circulation tank level and the alkali solution circulation tank level as constraints, it replenishes desalted water if the real-time alkali solution concentration is too high. If the real-time alkali solution concentration is too low, it replenishes the original alkali solution. If the real-time alkali solution concentration falls below a certain threshold, the alkali solution is discharged, achieving automatic alkali solution concentration control. This ensures a stable alkali solution concentration and guarantees the strip cleaning quality.

[0092] The present disclosure also provides an online detection system for alkali solution concentration, which can be used to implement any of the above-mentioned online detection methods for alkali solution concentration. The online detection system for alkali solution concentration includes:

[0093] The modeling module is configured to obtain the alkali solution concentration and the corresponding alkali solution surface tension, with the alkali solution concentration as the dependent variable y and the corresponding alkali solution surface tension as the independent variable x, and establish the alkali solution concentration prediction model y=a0+a1x+a2x 2 +…+a n x n ; Among them, a0, a1 to a n are model parameters;

[0094] A training module is configured to perform regression training on the alkali solution concentration prediction model using the least squares method until the deviation of the predicted alkali solution concentration is controlled within an allowable range;

[0095] The detection module is configured to obtain the real-time alkali solution surface tension as an independent variable xs, and substitute it into the trained alkali solution concentration prediction model to obtain the corresponding real-time alkali solution concentration prediction value ys;

[0096] The alkali solution concentration automatic control module is configured to adjust the real-time alkali solution concentration to the alkali solution concentration set value according to the real-time alkali solution concentration predicted value ys.

[0097] As shown in Figure 7, the alkali solution concentration automatic control module includes an online alkali solution concentration detection and automatic control computer, industrial Ethernet, the alkali wash process section PLC, and shut-off valves 1, 2, 3, 4, 5, and 6. The detection module includes liquid level gauges 1 and 2, and online alkali solution surface tension detectors 1 and 2. The online alkali solution concentration detection and automatic control computer communicates with the alkali wash process section PLC via industrial Ethernet.

[0098] The alkali concentration online detection and automatic control computer communicates with the alkali wash process PLC to collect data and issue commands for the alkali wash process. The alkali wash process PLC is connected to liquid level gauges 1 and 2, online alkali surface tension detectors 1 and 2, shut-off valves 1, 2, 3, 4, 5, and 6, collecting real-time information such as the electrolyte circulation tank alkali level, the electrolyte circulation tank alkali level, the electrolyte circulation tank alkali surface tension, and the electrolyte circulation tank alkali surface tension. The alkali concentration automatic control module compares the set alkali concentration data with the real-time alkali concentration data. Using the electrolyte circulation tank level and the alkali circulation tank level as constraints, the module replenishes desalted water if the real-time alkali concentration is too high, and replenishes original alkali water if the real-time alkali concentration is too low. If the real-time alkali concentration falls below a certain threshold, the waste alkali is discharged, achieving automatic alkali concentration control. This ensures stable alkali concentration and guaranteed strip cleaning quality.

[0099] Embodiment 8:

[0100] As shown in FIG8-FIG10 , this embodiment provides an electromagnetic filter 100 , which can be used in the above-mentioned embodiment 1 as the magnetic filter 15 therein.

[0101] The electromagnetic filter 100 includes a filter tank 101, a filter disc 102 and an impurity collector 103. The filter disc 102 includes an annular bracket 1021, multiple electromagnetic suction cups 1022 and an electronic control unit for controlling the power supply and loss of each electromagnetic suction cup 1022. Each electromagnetic suction cup 1022 is installed on the annular bracket 1021 and is distributed in an annular shape along the circumference of the annular bracket 1021. The annular bracket 1021 is equipped with a rotating drive mechanism 105 for driving its rotation; the annular bracket 1021 is partially located in the filter tank 101, and the impurity collector 103 is arranged outside the filter tank 101 and includes an impurity removal part for driving impurities from the electromagnetic suction cup 1022.

[0102] In one embodiment, the above-mentioned annular bracket 1021 includes an inner ring frame and an outer ring frame, and the inner ring frame and the outer ring frame are connected by a plurality of spokes. Each spoke divides the annular area between the inner ring frame and the outer ring frame into a plurality of suction cup mounting positions, and each suction cup mounting position is installed with an electromagnetic suction cup 1022.

[0103] Optionally, as shown in FIG11 , the spokes are distributed along the radial direction of the annular support 1021 , and the inner ring frame-spoke-outer ring frame are connected to form a hub shape.

[0104] The electromagnetic chuck 1022 is preferably detachably mounted on the annular bracket 1021 , including but not limited to methods such as fixing with screws.

[0105] The disk surface of the electromagnetic suction cup 1022 is preferably coplanar with the corresponding side surface of the annular bracket 1021. This not only facilitates the removal of impurities on the electromagnetic suction cup 1022, but also prevents the formation of some corners between the electromagnetic suction cup 1022 and the annular bracket 1021, which may cause dirt to accumulate.

[0106] Preferably, the annular bracket 1021 is connected to the rotation drive mechanism 105 via the bracket shaft 104 , and the rotation drive mechanism 105 drives the bracket shaft 104 to rotate, thereby driving the annular bracket 1021 and the electromagnetic suction cup 1022 on the annular bracket 1021 to rotate.

[0107] In one embodiment, the above-mentioned rotation drive mechanism 105 adopts a motor + transmission component structure, and the transmission component can be a sprocket drive, a pulley drive, etc.; the motor is preferably a variable frequency motor, which can control the rotation speed of the annular bracket 1021.

[0108] Preferably, the electric control unit includes a plurality of electric control cables and an electric control module. The number of the electric control cables is the same as the number of the electromagnetic suction cups 1022 and they are connected one-to-one. Each of the electric control cables is electrically connected to the electric control module.

[0109] In one embodiment, the support shaft 104 is a hollow shaft, and each of the electrical cables is routed through the hollow cavity of the support shaft 104. This approach facilitates the routing of the electrical cables and provides increased safety and reliability. Preferably, a wiring hole is provided in the annular support 1021 (e.g., an inner ring frame) to facilitate the entry of the electrical cables into the support shaft 104; a wiring channel is also provided in the electromagnetic chuck 1022 to connect the electrical cables to the coil within the electromagnetic chuck 1022.

[0110] Preferably, the annular bracket 1021 is detachably mounted on the bracket shaft 104. In one embodiment, the bracket shaft 104 is designed in sections, with the annular bracket 1021 clamped between two shaft segments 1041 of the bracket shaft 104 (generally, the inner ring bracket is clamped between the two shaft segments 1041 of the bracket shaft 104); optionally, a shaft shoulder is machined on the shaft segment 1041, and both ends of the inner hole of the inner ring bracket adopt a stepped hole structure. The shaft neck portion of the shaft segment 1041 is inserted into the large-diameter hole segment of the corresponding side stepped hole structure, and the shaft shoulder of the shaft segment 1041 abuts against the corresponding side end face of the inner ring bracket, and the two are fixed by screws.

[0111] Furthermore, when the rotating shaft segment 1041 and the inner ring frame are assembled, the electromagnetic suction cup 1022 can be further clamped between the two. For example, the outer ring wall of the inner ring frame adopts a stepped shaft structure, and a clamping groove is formed between the shaft shoulder of one rotating shaft segment 1041 and the large diameter wall of the stepped shaft outer ring wall. The corresponding side end of the electromagnetic suction cup 1022 is clamped in the clamping groove. This method can improve the stability and reliability of the installation of the electromagnetic suction cup 1022. In particular, when the electric control cable needs to enter the electromagnetic suction cup 1022 through the bracket rotating shaft 104, the above structure can ensure the alignment accuracy between the wiring hole on the annular bracket 1021 and the wiring channel in the electromagnetic suction cup 1022, thereby avoiding damage to the electric control cable and other faults.

[0112] In one embodiment, the electronic control module includes a central controller and conductive slip rings. Each of the electronic control cables is connected to the rotor portion of the conductive slip rings, and the central controller is connected to the stator portion of the conductive slip rings. The rotor portion of the conductive slip rings is preferably mounted on the bracket shaft 104. This structure ensures reliable control of the power supply and loss of each electromagnetic chuck 1022 while the electromagnetic chuck 1022 rotates normally.

[0113] The above-mentioned central controller includes but is not limited to a PLC controller.

[0114] When the annular bracket 1021 drives each electromagnetic suction cup 1022 to rotate, some electromagnetic suction cups 1022 are immersed in the filter tank 101 from outside the filter tank 101, and some electromagnetic suction cups 1022 leave the filter tank 101 and swing upward; for the electromagnetic suction cups 1022 that swing upward, ferromagnetic impurities are adsorbed on their surfaces, and the liquid that is carried up and the liquid in the adsorbed impurities can leave the electromagnetic suction cups 1022 under the action of gravity, so that the effect of gravity dehydration can be achieved. The impurities collected in the impurity collector 103 have a low water content, which not only facilitates the subsequent treatment of the impurities, but also reduces the loss of liquid in the filter tank 101.

[0115] In one embodiment, as shown in Figures 9 and 10, the filter disc 102 further includes a water retaining ring 1023, which is coaxially mounted on the support shaft 104 and abuts against the surface of each electromagnetic suction cup 1022. An annular water retaining edge is protruded from the outer ring wall of the water retaining ring 1023, and the annular water retaining edge and the electromagnetic suction cup 1022 form a water retaining groove. The provision of the water retaining ring 1023 can effectively guide the liquid, preventing it from entering places such as the support shaft 104 and affecting the normal operation of the electronic control unit.

[0116] Preferably, there are two water retaining rings 1023 and they are arranged on both sides of the annular bracket 1021.

[0117] Preferably, a sealing gasket can be sandwiched between the water retaining ring 1023 and the electromagnetic suction cup 1022 to improve the water retaining effect.

[0118] At the impurity collection station, impurities on the surface of the electromagnetic chuck 1022 may be scraped off, or the surface of the electromagnetic chuck 1022 may be flushed with high-pressure water or high-pressure gas.

[0119] In one embodiment, as shown in Figures 8-10 , the impurity removal unit includes a scraper 1031, the working end of which contacts the surface of the electromagnetic chuck 1022 in the impurity collection position; the impurity collector 103 also includes an impurity collection trough 1032, which is connected to the bottom of the scraper 1031. This method has low energy consumption and high working reliability.

[0120] Generally, both sides of the electromagnetic suction cup 1022 can absorb impurities. Therefore, it is preferred to set a scraper 1031 and an impurity collection groove 1032 on both sides of the annular bracket 1021 respectively; the distance between the working ends of the scrapers 1031 on both sides is preferably the same as the thickness of the electromagnetic suction cup 1022.

[0121] Preferably, as shown in FIG9 and FIG10 , the scraper blade 1031 is arranged at an angle to facilitate the scraped impurities to fall into the impurity collecting trough 1032 .

[0122] Optionally, the working end of the scraper 1031 is its top end, and the working end is preferably parallel to the horizontal plane, that is, the contact line between the scraper 1031 and the electromagnetic suction cup 1022 is parallel to the horizontal plane. This method can facilitate the arrangement of the scraper 1031, the impurity collection trough 1032, etc. and facilitate the collection of impurities.

[0123] Preferably, the scraper 1031 adopts a grooved plate, and the length direction of the scraper 1031 is defined as the direction from its working end to the impurity collection groove 1032. Wing plates are extended from the two lateral ends of the scraper 1031 to better restrain and guide the scraped impurities.

[0124] As a preferred embodiment of this invention, as shown in Figures 9 and 10, there are multiple groups of filter discs 102, and each of the annular brackets 1021 is sequentially mounted on the same bracket shaft 104, and the bracket shaft 104 is connected to the rotary drive mechanism 105. Providing multiple groups of filter discs 102 can improve the filtration efficiency and filtration effect.

[0125] As shown in FIG. 9 , two adjacent filter discs 102 may share a common impurity collection tank 1032 .

[0126] Preferably, as shown in FIG9 , a plurality of partitions are provided in the filter tank 101 , each partition dividing the filter tank 101 into a plurality of liquid storage tanks 1011 , preferably each liquid storage tank 1011 is respectively provided with a filter disc 102 ; wherein, the number of filter discs 102 and liquid storage tanks 1011 is preferably the same and they are arranged in one-to-one correspondence.

[0127] In one embodiment, upstream sewage can be allowed to enter each liquid storage tank 1011 at the same time.

[0128] In another embodiment, the liquid storage tanks 1011 can be connected in series, with upstream sewage first entering the first liquid storage tank 1011. The sewage then overflows between the upstream and downstream liquid storage tanks 1011. This allows for streamlined sewage treatment, enabling continuous treatment and ensuring treatment effectiveness and efficiency. As shown in Figure 9, in the first liquid storage tank 1011, the filter disc 102 is preferably positioned near the sewage inlet to immediately capture ferromagnetic impurities in the sewage and improve electromagnetic filtration effectiveness. In the tail liquid storage tank 1011, the filter disc 102 is preferably positioned near the filtrate outlet to improve the cleanliness of the discharged filtrate.

[0129] In particular, based on the segmented design of the bracket shaft 104 mentioned above, the installation and arrangement of each filter disc 102 can be facilitated; the number of filter discs 102 can be increased or decreased as needed, so the flexibility is very high; and it can facilitate equipment maintenance, for example, the filter disc 102 at the corresponding liquid storage tank 1011 can be disassembled and assembled without affecting the filtration process in other liquid storage tanks 1011.

[0130] The method of using the electromagnetic filter 100 includes:

[0131] The electromagnetic chucks 1022 are driven to rotate by the annular bracket 1021, so that the electromagnetic chucks 1022 can move cyclically between the working position, the dehydration position and the impurity removal position.

[0132] In the working position, the electromagnetic chuck 1022 is energized and at least partially immersed in the filter tank 101 to absorb ferromagnetic impurities in the filter tank 101;

[0133] In the dehydration position, the electromagnetic chuck 1022 remains energized;

[0134] In the impurity removal position, the electromagnetic chuck 1022 loses power, and the impurities are driven away from the electromagnetic chuck 1022 by the impurity removal unit and collected.

[0135] Embodiment 9:

[0136] The alkali solution circulation tank 11 in Example 7 is equipped with an iron sludge processing subsystem for online cleaning of iron sludge impurities in the alkali solution circulation tank 11, thereby improving the system's operational stability and reliability, as well as the cleaning quality of steel, and reducing downtime and frequency for desilting.

[0137] Preferably, the iron sludge processing subsystem is connected to the circulation area 111 .

[0138] As shown in Figures 11 and 12, the iron sludge processing subsystem includes an intermediate medium circulation mechanism and an iron sludge recovery mechanism. The intermediate medium circulation mechanism includes a plurality of intermediate media 330 capable of extracting iron sludge from the bottom of the alkali liquid circulation tank 11, and a medium conveying unit 331, a medium transfer unit 332 and a medium reflux unit 333 connected in sequence. The medium conveying unit 331 is connected to the intermediate medium outlet of the alkali liquid circulation tank 11, and the medium reflux unit 333 is connected to the intermediate medium inlet of the alkali liquid circulation tank 11; the iron sludge recovery mechanism includes a flushing unit arranged above the medium transfer unit 332 and an iron sludge collection box 321 arranged below the medium transfer unit 332.

[0139] In one embodiment, the intermediate medium 330 includes steel balls for entraining iron sludge, which facilitates the removal of iron sludge from the bottom of the container. Iron sludge at the bottom of the container is entrained by the cascading flow of steel balls and carried out of the alkali solution circulation tank 11 via the medium conveying unit 331. The surface roughness of the steel balls is designed to enhance the entrainment of iron sludge. In one embodiment, the surface roughness of the steel balls is Ra ≥ 0.8 μm, and more preferably, Ra ≤ 12 μm.

[0140] In one embodiment, as shown in FIG11 , a slope is provided at the bottom of the alkali solution circulation tank 11 , and the slope slopes from the intermediate medium inlet to the intermediate medium outlet, so as to facilitate the circulation of the intermediate medium 330 in the container. For example, the medium steel balls can rely on gravity to run from the intermediate medium inlet to the intermediate medium outlet, and the medium steel balls at a high position exert an extrusion and driving effect on the medium steel balls at a low position and the iron mud on the slope. Based on the circulation of the medium steel balls, the bottom of the container is always in motion, which can reduce the accumulation of iron mud, thereby saving the intervention of power equipment. At the same time, the design of the slope is also conducive to the deposition of iron mud at the intermediate medium outlet, thereby facilitating the intermediate medium 330 to bring the iron mud out.

[0141] In one embodiment, the medium conveying unit 331 adopts a screw pump or a screw conveyor. According to the relative position relationship between the intermediate medium outlet and the medium transfer unit 332, the screw pump or the screw conveyor can be arranged tilted or horizontally.

[0142] In one embodiment, as shown in FIG11 and FIG12 , the medium transfer unit 332 is a chain conveying unit, such as a chain plate conveyor or a drag chain conveyor. Accordingly, the medium transfer unit 332 includes an upper chain layer 3321 and a lower chain layer 3322 .

[0143] The gap between the chain plates of the chain conveying unit is smaller than the size of the intermediate medium 330 , for example, smaller than the diameter of the medium steel ball.

[0144] Among them, the medium conveying unit 331 is connected with the upper chain layer 3321. For example, the medium output port of the medium conveying unit 331 is located directly above the upper chain layer 3321, and the intermediate medium 330 can be conveyed to the upper chain layer 3321; optionally, a hopper is arranged above the upper chain layer 3321, and the intermediate medium 330 output by the medium conveying unit 331 is received by the hopper and transferred to the upper chain layer 3321, which can avoid the intermediate medium 330 from popping out of the upper chain layer 3321 due to excessive falling distance.

[0145] The medium return unit 333 is arranged at the outlet side of the chain conveyor unit. Optionally, the medium return unit 333 uses a conveyor roller to transport the cleaned intermediate medium 330 back to the alkali liquid circulation tank 11.

[0146] The flushing unit is used to flush the intermediate medium 330 on the medium transfer unit 332, thereby separating the iron sludge from the intermediate medium 330. In one embodiment, as shown in Figure 12, the flushing unit includes a flushing pipe 351. At least one set of spray structures can be arranged at the bottom of the flushing pipe 351. When there are multiple sets of spray structures, the spray structures are arranged sequentially along the conveying direction of the intermediate medium 330. Each set of spray structures includes at least one nozzle. When there are multiple nozzles in the spray structure, the nozzles in the spray structures are preferably arranged sequentially along the width direction of the medium transfer unit 332.

[0147] Furthermore, as shown in Figure 12, the flushing unit further includes a flushing liquid supply pipe 352, which is connected to the flushing pipe 351 and is used to supply flushing liquid. Preferably, surface water from the alkali liquid circulation tank 11 is used as the flushing liquid. Accordingly, the flushing liquid supply pipe 352 is connected to the upper portion of the alkali liquid circulation tank 11.

[0148] The flushing liquid can exit through both sides of the medium transfer unit 332, and / or, if the medium transfer unit 332 is a hollow conveying device, it can exit through the gaps between the chain plates of the chain conveyor unit. In one embodiment, as shown in Figures 11 and 13, the iron sludge recovery mechanism also includes a drainage unit 322, which is arranged between the upper chain layer 3321 and the lower chain layer 3322 of the medium transfer unit 332. The top inlet of the drainage unit 322 is located directly below the flushing unit, and the bottom outlet of the drainage unit 322 is located directly above the iron sludge collection box 321. Based on this design, the flushing liquid can be reliably drained into the iron sludge collection box 321, making the on-site environment cleaner. At the same time, it prevents flushing water carrying iron sludge from contaminating the lower chain layer 3322, thereby improving the operating reliability of the medium transfer unit 332 and reducing its maintenance frequency.

[0149] Preferably, as shown in Figures 11 and 13, the above-mentioned drainage unit 322 has an inverted Y-shaped structure, forming one drainage inlet pipe and two drainage outlet pipes; the two drainage outlet pipes can ensure the drainage efficiency and effect of the flushing fluid on the one hand, and on the other hand, it is also convenient for the arrangement of the lower chain layer 3322, for example, the lower chain layer 3322 is located between the two drainage outlet pipes.

[0150] The upper chain layer 3321 may be arranged in the drainage inlet pipe, so as to better capture the intermediate medium 330 and iron mud splashed by the high-pressure jet.

[0151] Preferably, as shown in Figures 11 and 13, the above-mentioned drainage unit 322 is connected to the iron mud collection box 321 to form an integrated structure. For example, for the above-mentioned inverted Y-shaped drainage unit 322, its outer frame 3221 is integrally formed with the iron mud collection box 321 to form a top-closed box body, and an inverted V-shaped mudguard 3222 is arranged in the box body, which correspondingly constitutes the inner frame of the drainage unit 322.

[0152] In one embodiment, a protective net 323 is further arranged around the upper chain layer 3321 of the medium transfer unit 332. The protective area of ​​the protective net 323 at least covers the flushing area of ​​the upper chain layer 3321. The provision of the protective net 323 can prevent the high-pressure jet from spraying the intermediate medium 330 out of the medium transfer unit 332.

[0153] Among them, the protective net 323 can provide side protection. Optionally, the protective net 323 includes two side mesh panels 3231, and the two side mesh panels 3231 are arranged on both sides of the conveying channel of the medium transfer unit 332; the side mesh panels 3231 preferably do not move together with the medium transfer unit 332, for example, they are installed through mesh panel brackets. For the above-mentioned solution with a drainage unit 322, the side mesh panels 3231 can also be installed on the outer frame 3221 of the drainage unit 322.

[0154] And / or, the protective net 323 can provide upper protection. Optionally, the protective net 323 includes a top mesh panel 3232, which is installed above the medium transfer unit 332; the top mesh panel 3232 preferably does not move with the medium transfer unit 332, and its installation method can refer to the installation method of the side mesh panel 3231.

[0155] The iron sludge processing subsystem is further optimized. As shown in FIG11 and FIG12 , the iron sludge recovery mechanism further includes a filtering unit, and the iron sludge collection box 321 is provided with a flushing liquid recovery pipe connected to the filtering unit.

[0156] Optionally, the filtrate produced by the filtration unit can be reused as a flushing liquid. For example, the filtrate outlet pipe of the filtration unit is connected to a flushing liquid storage tank, and the flushing liquid supply pipe 352 is also connected to the flushing liquid storage tank. When the flushing liquid is surface water from the alkali liquid circulation tank 11, the filtrate produced by the filtration unit can be returned to the alkali liquid circulation tank 11. Accordingly, the filtrate outlet pipe of the filtration unit is connected to the alkali liquid circulation tank 11.

[0157] The iron sludge collection box 321 can control the direction of the flushing liquid by overflowing, and the flushing liquid recovery pipe is connected to the overflow level of the iron sludge collection box 321. Heavier impurities are deposited at the bottom of the iron sludge collection box 321 and can be cleaned regularly or irregularly.

[0158] In one embodiment, the filtering unit includes an electromagnetic filtering device for removing ferromagnetic impurities in the flushing liquid, which can reliably adsorb and remove ferromagnetic impurities suspended in the flushing liquid; the electromagnetic filtering device preferably adopts the electromagnetic filter 100 provided in the above embodiment 3.

[0159] Embodiment 10:

[0160] Referring to Figures 13, 14, and 15, an embodiment of the present invention provides a shutdown sealing mechanism comprising a non-rotating ring 810 and a rotating ring 809, both of which can be mounted on the same shaft. Both the non-rotating ring 810 and the rotating ring 809 have sealing surfaces. The shutdown sealing mechanism 800 also includes a magnetic assembly for forcing the sealing surface of the non-rotating ring 810 into contact with the sealing surface of the rotating ring 809. During shutdown, the magnetic assembly forces the sealing surface of the non-rotating ring 810 into contact with the sealing surface of the rotating ring 809, achieving a seal at the joint. Specifically, the shutdown sealing mechanism 800 can be used on any component with a shaft, such as a centrifugal pump or a defoaming device. It can be used in conjunction with other sealing methods, such as mechanical seals, dynamic seals, and maintenance-free seals. All sealing methods described in the following embodiments can be used in conjunction with the shutdown sealing mechanism 800, achieving a good sealing effect regardless of whether the machine is shut down or not. The shutdown sealing mechanism 800 may use a magnetic component to drive the sealing surface of the non-rotating ring 810 and the sealing surface of the rotating ring 809 to fit together and separate.

[0161] 13, 14, and 15 , the non-rotating ring 810 is further described. The non-rotating ring 810 comprises a retractable bellows or spring, with the sealing surface of the non-rotating ring 810 being located on a side of the bellows or spring proximate to the rotating ring 809. A retractable structure such as a metal bellows or spring can be employed, with a magnetic assembly providing suction to achieve retraction.

[0162] To further optimize the above solution, see Figures 13, 14 and 15 , where the magnetic assembly is an electromagnetic assembly. The magnetic assembly can be an electromagnetic assembly, utilizing the characteristics of electromagnetics being magnetic when energized and losing their magnetic properties when de-energized, to achieve automatic driving of the non-rotating ring 810 .

[0163] Detailed description of the electromagnetic assembly, as shown in Figures 13, 14, and 15, includes an electromagnetic coil 806 sheathed around a non-rotating ring 810. The non-rotating ring 810 is mounted on a non-rotating ring mounting plate 807, which is equipped with iron that can be attracted by the electromagnetic coil 806. In this embodiment, the electromagnetic coil 806 can be used to generate suction to attract iron sheets, blocks, and the like to the non-rotating ring mounting plate 807. Both the non-rotating ring mounting plate 807 and the rotating ring mounting plate 811 are annular, facilitating mounting on a matching shaft.

[0164] Specifically: Please refer to Figures 13, 14 and 15. The shutdown sealing mechanism 800 is located at the rear side of the pump cover 804, which is the pump cover 804 of a centrifugal pump, including a non-rotating ring 810 that is sleeved on the shaft sleeve 808 and installed on the pump cover 804, a rotating ring 809 that is sleeved on the shaft sleeve 808 and located at the rear side of the non-rotating ring 810, and an electromagnetic coil 806. The non-rotating ring 810 adopts a metal bellows or a spring and a sealing ring structure and one end away from the rotating ring 809 is fixed on the pump cover 804, and the other end is free. The electromagnetic coil 806 is sleeved on the outside of the non-rotating ring 810 and fixed on the pump cover 804. During operation, power is supplied through an external circuit to generate magnetic attraction for the non-rotating ring mounting plate 807, so that the sealing surfaces of the rotating ring 809 are separated; when the machine is shut down, the power is cut off, the electromagnetic coil 806 loses its magnetism and separates from the non-rotating ring mounting plate 807, and the sealing surfaces of the non-rotating ring 810 and the rotating ring 809 are restored to a close contact state.

[0165] Please refer to Figures 13, 14 and 15. The electromagnetic coil 806, which generates magnetism when energized, attracts the non-rotating ring mounting plate 807 so that the two are completely fitted together, thereby compressing the bellows so that the free end of the non-rotating ring 810 is away from the rotating ring 809, and there will be no problem of sealing surface wear and mechanical energy loss between the two.

[0166] Please refer to Figures 13, 14 and 15. The shutdown sealing mechanism 800 realizes the sealing when the machine is shut down: when the machine is shut down, the electromagnetic coil 806 that loses its magnetism due to power failure is separated from the non-rotating ring mounting plate 807. Under the pressure of the bellows, the free end of the non-rotating ring 810 moves toward the rotating ring 809 until it is re-adhered to the sealing surface of the rotating ring 809, thus achieving the sealing of the joint. An electric heater is installed on the sealing surface of the rotating ring 809 to avoid the wear of the sealing surface caused by the accumulation of the medium that is easy to crystallize. The non-rotating ring 810 adopts a metal bellows structure, which is resistant to high temperature, has good end face wear resistance, large load-bearing capacity, and is easy to operate. The pump is stable, and its internal elastic metal rings form a labyrinth seal, which prevents the medium from wearing and corroding the sleeve 808 and the pump shaft 802. There is no need to set a sealing ring, which solves the problem of sealing ring deterioration and failure under high temperature (>150°C). It does not require mechanical seal isolation fluid, reduces friction resistance, has good tracking and shock resistance, and has a large tolerance for the vibration and deflection of the pump shaft 802. At the same time, the electromagnetic coil 806 is equipped with a temperature sensor, which is interlocked with the power supply of the motor 10. Once the temperature of the electromagnetic coil 806 is too high, the power supply of the motor 10 is immediately disconnected. It has high durability for high-temperature media below 350°C. This centrifugal pump has high durability for hazardous media such as those that are easy to crystallize, scale, fixed at room temperature, flammable, and explosive, and can be widely used in the fields of chemical, metallurgical, and environmental protection fluid media transportation.

[0167] Referring to Figures 13, 14, and 15, in this embodiment, electromagnetic coil 806 is sleeved on the outside of non-rotating ring 810 and fixed to pump cover 804. The iron sheet that cooperates with it to achieve adsorption is fixed to non-rotating ring mounting plate 807. Non-rotating ring 810, equipped with a bellows, is fixed to pump cover 804. Rotating ring 809, sleeved on shaft sleeve 808 and fixed to rotating ring mounting plate 811, rotates with the shaft. During operation, non-rotating ring mounting plate 807, attracted by the magnetic force generated by electromagnetic coil 806, approaches and fits together, while compressing non-rotating ring 810 to separate its sealing surface from the sealing surface of rotating ring 809. The amount of compression of non-rotating ring 810 is calculated to ensure that the sealing surfaces are tightly fitted when the machine is stopped and disengaged during operation.

[0168] Please refer to Figures 13, 14 and 15. In this embodiment, the non-rotating ring 810 is installed on the rear side of the pump cover 804 by means of gaskets and screws, and the end of the rotating ring 809 away from the non-rotating ring 810 is fixed to the non-rotating ring mounting plate 807 by screws. The non-rotating ring mounting plate 807 is fixed to the shaft sleeve 808. The installation method of the rotating ring 809 and the non-rotating ring 810 is simple and reliable.

[0169] 13 , 14 and 15 , in this embodiment, the rear end of the pump shaft 802 passes through a bearing 9 and is connected to an external drive. The bearing 9 is provided on a bearing frame 805 .

[0170] Please refer to Figures 13, 14 and 15. In this embodiment, a protection device 815 is also included. The protection device 815 includes a temperature sensor, which monitors the coil temperature and is interlocked with the motor 10. When it senses that the temperature inside the coil exceeds a certain level, the power supply is immediately cut off to prevent the circuit from burning and the sealing surface from wearing.

[0171] Referring to Figures 13, 14, and 15, this embodiment also includes a heating device 816, which is mounted on the seal to heat the sealing surface. Even if media that are prone to crystallization and scaling accumulate around the sealing surface, it is difficult for crystals to form and cause friction damage to the sealing surface.

[0172] Example 11:

[0173] Please refer to Figures 13, 14 and 15. An embodiment of the present invention further provides a centrifugal pump having a shutdown sealing mechanism 800 of Example 10, which can play a sealing role during shutdown. Specifically, the centrifugal pump includes a pump body 801, the pump body 801 is connected to a rotatable pump shaft 802, and the pump shaft 802 is sleeved with a non-rotating ring 810 and a rotating ring 809. The non-rotating ring 810 and the rotating ring 809 both have sealing surfaces. The shutdown sealing mechanism 800 also includes a magnetic component for driving the sealing surface of the non-rotating ring 810 to fit the sealing surface of the rotating ring 809. In this embodiment, the above-mentioned shutdown sealing mechanism 800 is used in a centrifugal pump to achieve a good shutdown sealing effect, and the sealing performance is better than that of traditional shutdown sealing forms.

[0174] 13, 14 and 15, the pump body 801 is further described. One end of the pump body 801 has an inlet and an outlet, and the other end is provided with a pump cover 804. In this embodiment, the inlet and outlet are provided to facilitate liquid delivery, and the pump cover 804 can serve to secure the components.

[0175] 13 , 14 and 15 , the non-rotating ring 810 is fixedly mounted on the pump cover 804 . In this embodiment, the non-rotating ring 810 does not rotate, so it can be fixedly mounted together with the pump cover 804 .

[0176] 13, 14, and 15, as an optimized solution of the embodiment of the present invention, the pump shaft 802 is sleeved with a sleeve 808, and the non-rotating ring 810 and the rotating ring 809 are both sleeved on the sleeve 808. The sleeve 808 facilitates the installation of the non-rotating ring 810 and the rotating ring 809.

[0177] Please refer to FIG. 13 , FIG. 14 and FIG. 15 . The electromagnetic coil 806 is sleeved outside the non-rotating ring 810 and fixed on the pump cover 804 .

[0178] As for other components of the shutdown sealing mechanism 800, please refer to the above embodiment and will not be described again here.

[0179] At this point, the centrifugal pump does not require frequent maintenance, has low mechanical energy loss, does not require mechanical seal isolation fluid, and has high durability for media prone to crystallization / scaling.

[0180] Example 12:

[0181] Referring to Figures 13, 14, and 15, an embodiment of the present invention further provides a centrifugal pump having not only the aforementioned shutdown sealing mechanism 800 but also a non-stop sealing mechanism 800. The combination of the two can achieve a sealing function for both operation and non-operation of the centrifugal pump. The non-stop sealing mechanism 800 can include the sealing structure of any of the aforementioned embodiments. This embodiment is described using a dynamic sealing structure, and other sealing structures are not further described.

[0182] Specifically, the centrifugal pump includes a pump body 801 having an internal space, and a pump cover 804 is installed on the pump body 801, the pump cover 804 blocks the pump body 801 and forms an inner cavity in the pump body 801, the pump body 801 is connected to a pump shaft 802, the pump shaft 802 passes through the pump cover 804, and a part of the pump shaft 802 is placed in the inner cavity, and the other part extends out of the pump body 801, a non-stop sealing mechanism 800 is provided in the inner cavity, and a shutdown sealing mechanism 800 is provided outside the inner cavity, the shutdown sealing mechanism 800 includes a non-rotating ring 810 and a rotating ring 809 which are sleeved on the pump shaft 802, the non-rotating ring 810 and the rotating ring 809 both have sealing surfaces, and the shutdown sealing mechanism 800 also includes a magnetic component for driving the sealing surface of the non-rotating ring 810 to fit the sealing surface of the rotating ring 809.

[0183] As an optimized solution of the embodiment of the present invention, please refer to Figures 13, 14 and 15. The detailed structure of the shutdown sealing mechanism 800 mentioned above can be found in the tenth and eleventh embodiments, which will not be described here in detail.

[0184] As an optimized solution of an embodiment of the present invention, please refer to Figures 13, 14, and 15. The dynamic seal structure includes an impeller 814 having a guide flow channel, an auxiliary impeller chamber 803 located in the inner cavity, and an auxiliary impeller 14 disposed within the auxiliary impeller chamber 803. The auxiliary impeller chamber 803 is located on the side of the impeller 814 near the pump cover 804. In this embodiment, the auxiliary impeller 14 rotates within the auxiliary impeller chamber 803 to form a negative pressure zone, preventing the medium in the pump from leaking along the pump shaft 802 beyond the auxiliary impeller chamber 803 and the auxiliary impeller 14. This also prevents corrosive, high-temperature, and solid particle-containing media from damaging the rear side of the auxiliary impeller 14.

[0185] As an optimization solution of the embodiment of the present invention, please refer to Figures 13, 14 and 15. The impeller is provided with auxiliary blades. In this embodiment, when the centrifugal pump is not shut down, the auxiliary blades can reduce the pressure on the back of the impeller to keep the pump shaft 802 in a balanced state.

[0186] Example 13:

[0187] Referring to Figures 13, 14, 15, and 16, an embodiment of the present invention provides a defoaming device having both the shutdown sealing mechanism 800 and the non-stop sealing mechanism 800 described in the above embodiments. The shutdown sealing mechanism 800 is a maintenance-free sealing mechanism that is less susceptible to wear, does not require flushing, reduces energy consumption, and is easy to install and use. The non-stop sealing mechanism 800 can also be used with the sealing structure of any of the above embodiments, such as the mechanical seal structure 18. This embodiment is described using a dynamic seal structure, and the mechanical seal structure 18 can also be used in conjunction with the dynamic seal structure. This embodiment primarily discusses the dynamic seal structure, and other sealing forms will not be discussed in detail.

[0188] Specifically, referring to Figures 13, 14, 15, and 16, the defoaming device includes a housing 5, a defoaming impeller 13 for eliminating foam, and a motor 10 for driving the defoaming impeller 13 to rotate. The defoaming impeller 13 is disposed within the housing 5, and an impeller connecting shaft 12 of the defoaming impeller 13 is coaxially connected to a motor shaft 100 of the motor 10. The housing 5 has a suction section 17 for allowing foam to enter the housing 5, and also includes a shutdown sealing mechanism 800 for sealing the motor shaft 100. The shutdown sealing mechanism 800 is disposed on a side of the defoaming impeller 13 away from the suction section 17. In this embodiment, the shutdown sealing mechanism 800 can achieve sealing at the joint when the defoaming device stops operating.

[0189] Specifically, referring to Figures 13, 14, 15, and 16, the shutdown sealing mechanism 800 includes a non-rotating ring 810 and a rotating ring 809, both of which can be mounted on the impeller connecting shaft 12. Both the non-rotating ring 810 and the rotating ring 809 have sealing surfaces. The shutdown sealing mechanism 800 also includes a magnetic assembly for driving the sealing surface of the non-rotating ring 810 into contact with the sealing surface of the rotating ring 809. For further details regarding the shutdown sealing mechanism 800, please refer to Example 10 and will not be repeated here. The non-rotating ring 810 and the electromagnetic coil 806 are fixed to the pump cover 804. During operation, the electromagnetic coil 806 is energized to attract the non-rotating ring mounting plate 807 toward and into contact with it, causing the sealing surfaces of the rotating non-rotating ring 810 to disengage and prevent wear between the two. During shutdown, the electromagnetic coil 806 is de-energized to release the non-rotating ring mounting plate 807, allowing the sealing surfaces of the rotating non-rotating ring 810 to re-engage. This part improves the sealing performance of the centrifugal device, blocks the leakage of process media and foam, avoids the motor 10 from burning out and affecting the surrounding environment, and also reduces the wear of the sealing surface.

[0190] As an optimization scheme of an embodiment of the present invention, please refer to Figures 13, 14, 15 and 16, which also includes a dynamic sealing structure, which is arranged between the defoaming impeller 13 and the shutdown sealing mechanism 800. In this embodiment, this dynamic sealing structure is provided, which can play a sealing role when the defoaming device is running, and when the defoaming device is stopped, the shutdown sealing mechanism 800 can play a sealing role again, so that the sealing of the defoaming device under different working conditions can be achieved, and the shutdown sealing mechanism 800 is also a maintenance-free sealing mechanism. The dynamic sealing structure uses an auxiliary impeller 14, which rotates at a certain angular velocity so that its pressure direction is opposite to the pressure direction generated by the defoaming impeller 13, so as to prevent the high-pressure medium from leaking into the sealing chamber where the shutdown sealing mechanism 800 is located when the device is running. The auxiliary blade chamber 803 used in conjunction with it can also play a role in balancing the axial force. This is also described in detail in the above embodiment and will not be repeated here.

[0191] As an optimized solution of the embodiment of the present invention, please refer to Figures 13, 14, 15, and 16. A mounting base 11 is mounted on top of the container in a size that matches the container. A motor 10 is securely connected to the mounting base 11 via a motor frame 91. Motor 10 drives the defoaming impeller 13 via the impeller connecting shaft 12, the shaft expansion sleeve 813, the auxiliary impeller 14, and the shutdown sealing mechanism 800. Rotation of the defoaming impeller 13 generates suction, drawing foam generated on the container surface into the inlet of the defoaming impeller 13 through a suction section 17 configured along the container's shape. The defoaming impeller 13 utilizes the shear force and compression effects generated by the impeller to rupture bubbles, separating the gas and liquid. The liquid is then flung toward the housing 5 by inertia. The defoamed liquid flows along the housing 5 into the flow guide box 16, which further dissipates energy from the defoamed fluid while dispersing it into the container, avoiding conflict with the foam flow.

[0192] The shutdown sealing mechanism 800 cooperates with the auxiliary impeller 14 to completely isolate the foam flow and liquid flow in the container from the motor 10. During operation, the dynamic seal prevents the medium in the pump from leaking along the impeller connecting shaft 12 over the auxiliary impeller 14. At the same time, the external circuit is powered on, and the electromagnetic coil 806 generates magnetic attraction to the non-rotating ring mounting plate 807 to compress the bellows on the non-rotating ring 810, so that the magnetic surface of the coil is adsorbed and fitted with the non-rotating ring mounting plate 807. The non-rotating ring mounting plate 807 pulls the free end of the non-rotating ring 810 away from the rotating non-rotating ring 810, and there will be no problem of sealing surface wear or mechanical energy loss between the two. When shutting down, under the control of the time relay, the external circuit will be powered off 2 to 3 seconds after the motor 10 is powered off, and the non-rotating ring 810 will be tightly attached to the sealing surface of the rotating non-rotating ring 810 again, thereby achieving sealing at the joint.

[0193] The foam flow or liquid flow caused by the positive or negative pressure of the foamable medium in the container will not cause damage to the motor 10. Even if the shutdown sealing mechanism 800 and the auxiliary impeller 14 are damaged, the foam flow or liquid flow will be intercepted by the shaft expansion sleeve 813 and will not cause damage to the motor 10. An electric heater is installed on the sealing surface of the rotating non-rotating ring 810 to avoid wear of the sealing surface caused by the accumulation of the easy-crystallization medium. At the same time, the electromagnetic coil 806 is equipped with a temperature sensor, which is interlocked with the power supply of the motor 10. Once the temperature of the electromagnetic coil 806 is too high, the power supply of the motor 10 is immediately disconnected, and it has high durability for high-temperature media below 350°C. A mouth ring 15 is added between the suction pipe and the inner cavity of the defoaming impeller 13 to increase the sealing of the impeller suction port, reduce wear, improve the suction force of the defoaming impeller 13, prevent internal circulation, and increase the effect of the defoaming impeller 13.

[0194] Example 14:

[0195] An embodiment of the present invention provides a defoaming device, comprising a housing 5, a defoaming impeller 13 for eliminating foam, and a motor 10 for driving the defoaming impeller 13 to rotate, wherein the defoaming impeller 13 is arranged in the housing 5 and is coaxially connected to the motor shaft 100 of the motor 10, the housing 5 has a suction section 17 for foam to enter the housing 5, and further comprises a maintenance-free sealing assembly 30 and a shutdown sealing mechanism 800 for sealing the motor shaft 100, the maintenance-free sealing assembly 30 and the shutdown sealing mechanism 800 are both arranged on the side of the defoaming impeller 13 away from the suction section 17. In this embodiment, the maintenance-free sealing assembly 30 and the shutdown sealing mechanism 800 are arranged in the same defoaming device. From the above embodiment, it can be seen that the shutdown sealing mechanism 800 is also a maintenance-free structure. Therefore, the combined use of the two can not only achieve sealing when the machine is shut down and when it is not shut down, but also fully realize the maintenance-free function.

[0196] Specifically, please refer to Figures 3 and 16, which respectively embody a maintenance-free sealing assembly 30 and a shutdown sealing mechanism 800, both of which can be arranged on the impeller connecting shaft 12. The maintenance-free sealing assembly 30 can be arranged below the shutdown sealing mechanism 800, and the maintenance-free sealing assembly 30 first realizes sealing during operation, and then the shutdown sealing mechanism 800 realizes sealing during shutdown.

[0197] As for the detailed structures of the maintenance-free sealing assembly 30 and the shutdown sealing mechanism 800, please refer to the above embodiments and will not be described again here.

[0198] Embodiment 15:

[0199] An embodiment of the present invention provides a defoaming device, including a self-locking structure 90, which can be used in any of the above-mentioned embodiments. Specifically, please refer to Figures 17, 18 and 19. The defoaming device includes a shell 5, a defoaming impeller 13 for eliminating foam, and a motor 10 for driving the defoaming impeller 13 to rotate. The defoaming impeller 13 is arranged in the shell 5, and the shell 5 has a suction section 17 for foam to enter the shell 5. The device also includes a transmission shaft 92, and the defoaming impeller 13 is locked on the transmission shaft 92 by the self-locking structure 90. The transmission shaft 92 is coaxially arranged with the motor shaft 100 of the motor 10. In this embodiment, the self-locking structure 90 can prevent the defoaming impeller 13 from vibrating too much when loose, or even the defoaming impeller 13 from falling off, and has good stability and shockproof performance. Specifically, the existing locking nut cannot provide a stable locking effect when the motor 10 is rotating forward or reverse. The present application can ensure that the defoaming impeller 13 is locked on the drive shaft 92 through the self-locking structure 90, thereby avoiding various problems caused by the inability to lock.

[0200] 17, 18 and 19, the self-locking structure 90 includes a self-locking nut 95 threadedly sleeved on the end of the transmission shaft 92, a locking block 96 that can fit the transmission shaft 92, and a driving member for pushing the locking block 96 until it is pressed tightly against the transmission shaft 92. The locking block 96 is mounted on the self-locking nut 95. In this embodiment, by using the locking block 96 to fit tightly against the transmission shaft 92 and the locking block 96 being mounted on the self-locking nut 95, the self-locking nut 95 can be stably locked to the transmission rod after the locking block 96 is pressed tightly against the transmission shaft 92.

[0201] As a more preferred solution, referring to Figures 17, 18 and 19, the locking block 96 can be embedded in the self-locking nut 95, which can reduce the volume of the self-locking structure 90. Specifically, a groove can be formed by recessing the self-locking nut 95 near the inner wall thereof, and the locking block 96 can be disposed in the groove. This will not affect the locking of the self-locking nut 95 on the transmission rod. After the self-locking nut 95 is locked, the locking block 96 is pushed and pressed against the transmission shaft 92 by the driving member. In this way, whether the transmission shaft 92 is running forward or reverse, it can be ensured that the locking nut will not be detached from the transmission rod. Preferably, the size of the groove body is consistent with the size of the locking block 96, and the locking block 96 is designed to be consistent in size. The locking block 96 can completely enter the groove body, making the locking nut more consistent. If the design accuracy is high, it is even completely invisible that there is a locking block 96 in the locking nut. Normally, when the lock nut is screwed onto the transmission rod, the threaded connection is relatively tight. However, after being locked by the locking block 96, friction can achieve a secure lock. The orientation of the groove body aligns with the direction of movement of the locking block 96. This groove body also serves as a guide, preventing the locking block 96 from being squeezed and shifted horizontally during the tightening of the rod body. This ensures that the locking block 96, the rod body, and the lock nut are balanced and stable at the end of the transmission shaft 92, achieving a self-locking effect.

[0202] For details of the above-mentioned driving member, please refer to Figures 17, 18 and 19. The driving member includes a rod body, and the self-locking nut 95 has a hole for the rod body to pass through. The rod body is connected to the locking block 96. The locking block 96 can be pushed by the rod body passing through the hole. Preferably, the rod body is a threaded rod 97, and the hole is a threaded hole. The rod body is threadedly connected to the threaded hole. The position of the threaded rod 97 can be fixed by the threaded hole, so that the threaded rod 97 can be tightened, thereby increasing the pressure. Of course, it is also feasible to keep the rod body pressed against the locking block 96 by an external structure, and this embodiment does not limit this.

[0203] Thus, the self-locking structure 90 is adopted to achieve stable locking of the motor 10 in both forward and reverse rotations. At the same time, the through holes at both ends of the self-locking nut 95 are threaded to fix the position of the threaded rod 97, so that the threaded rod 97 can increase the pressure. The self-locking nut 95 has a good stabilizing effect on the transmission shaft 92 and the components on the shaft, and can be widely used in the field of vertical rotor structure equipment involving forward and reverse high-speed rotation of the motor 10.

[0204] The specific operation is as follows: during operation, when the motor 10 rotates forward, the motor 10 drives the transmission shaft 92, and the transmission shaft 92 drives the defoaming impeller 13 to rotate in the same direction as the rotation direction of the self-locking nut 95, which can achieve a better fixing effect; because the threaded rod 97 is tightened to support the internal locking block 96, the locking block 96 fits tightly against the transmission shaft 92. Even if the motor 10 is reversed, causing the defoaming impeller 13 to rotate in the opposite direction to the self-locking nut 95, the friction between the locking block 96 and the transmission shaft 92 can still ensure the stable rotation of the defoaming impeller 13 and the fixing effect of the parts on the transmission shaft 92.

[0205] As an optimized solution of the embodiment of the present invention, please refer to Figures 17, 18, and 19. A base plate 94 is placed on the housing 5, and the motor 10 is disposed in the motor frame 91, which is mounted on the base plate 94. The transmission shaft 92 and the motor shaft 100 are fixedly connected by a shaft expansion sleeve 813, thereby achieving a reliable connection between the two, efficiently transmitting the power output by the motor 10 to the transmission shaft 92 and the parts on the shaft, and also reducing vibration, improving the stability of equipment operation, reducing the vibration of the defoaming impeller 13, and the axial force borne by the self-locking nut 95, thereby extending the service life of the self-locking nut 95. The upper surface of the motor frame 91 is matched with the stopper of the motor 10, and the lower end is connected to the bottom plate 94. The bottom plate 94 supports the sealing assembly and is connected to the outer housing and bushing of the bearing 9. The shaft sleeve 808 inside the housing is connected to the transmission shaft 92. The defoaming impeller 13 at the lower end of the shaft sleeve 808 is connected to the transmission shaft 92 through a key. At the threaded end of the transmission shaft 92, the anti-reverse self-locking nut 95 is screwed to the bottom surface of the hub of the defoaming impeller 13 in the same direction of thread rotation, and the locking block 96 is further locked on the transmission shaft 92 by tightening the threaded rods 97 at both ends of the self-locking nut 95. During operation, the motor shaft 100 of the motor 10 drives the transmission shaft 92 to rotate, and the upper mechanical seal structure 18, the sleeve of the sliding bearing 9, the defoaming impeller 13 and the self-locking nut 95 rotate accordingly. When the motor 10 reverses, the friction between the locking block 96 and the transmission shaft 92 is much greater than the reverse friction between the defoaming impeller 13 and the self-locking nut 95, so that the self-locking nut 95 is firmly connected.

[0206] As an optimization scheme of an embodiment of the present invention, please refer to Figures 17, 18 and 19. A guide box 16 is provided at the bottom of the housing 5. In this embodiment, the motor 10 drives the defoaming impeller 13 to rotate through the motor shaft 100 and the mechanical seal structure 18. After the defoaming impeller 13 rotates, a suction force is formed. The foam generated on the surface of the container is sucked into the inlet of the defoaming impeller 13 through the suction section 17 arranged along the shape of the container. The defoaming impeller 13 utilizes the shear force and compression effect generated by the impeller to break the bubbles, separate the gas and liquid, and the liquid is thrown toward the housing 5 by the inertial force. The liquid generated after defoaming flows along the housing 5 into the guide box 16. The guide box 16 further dissipates the energy of the fluid after defoaming and disperses it into the container to avoid conflict with the foam flow. Preferably, the guide box 16 is a plate-type welded multi-block threaded structure. A circle of cylinders is welded on the upper surface of the suction section 17, and the cylinder is connected to the housing 5 by threads.

[0207] As an optimized solution of an embodiment of the present invention, please refer to Figures 17, 18 and 19. The device also includes a sealing assembly for preventing the foam flow and medium in the housing 5 from entering the motor 10. The sealing method can adopt a mechanical sealing structure 18. The mechanical sealing structure 18 is the most effective and stable sealing method. The mechanical seal can include a non-container mechanical seal and a container mechanical seal. Its function is to effectively seal and isolate the foam flow and the medium flow along the shaft from entering the motor 10 or the external environment. Specifically, the mechanical sealing mechanism is used for dynamic sealing of the rotating part. By coordinating with an appropriate flushing solution, it can achieve a small amount of leakage or zero leakage of the medium. It is composed of at least a pair of end faces perpendicular to the rotation axis, which are kept in contact and slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism and the cooperation of the auxiliary seal to prevent fluid leakage. The device can be set on the shaft. It is a relatively common sealing method in the prior art.

[0208] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A multi-state sealed centrifugal pump, characterized in that: It includes a pump body with an internal space, a pump cover is installed on the pump body, the pump cover blocks the pump body and forms an inner cavity in the pump body, the pump body is connected to a pump shaft, the pump shaft passes through the pump cover, a part of the pump shaft is placed in the inner cavity, and the other part extends out of the pump body, a non-stop sealing mechanism is provided in the inner cavity, a shutdown sealing mechanism is provided outside the inner cavity, the shutdown sealing mechanism includes a non-rotating ring and a rotating ring sleeved on the pump shaft, the non-rotating ring and the rotating ring both have sealing surfaces, and the shutdown sealing mechanism also includes a magnetic component for driving the sealing surface of the non-rotating ring to fit the sealing surface of the rotating ring.

2. A multi-state sealed centrifugal pump as claimed in claim 1, characterized in that: The dynamic sealing structure comprises an impeller with a guide flow channel and an auxiliary impeller chamber located in the inner cavity. An auxiliary impeller is arranged in the auxiliary impeller chamber, and the auxiliary impeller chamber is located on a side of the impeller close to the pump cover.

3. A multi-state sealed centrifugal pump as claimed in claim 1, characterized in that: The impeller is provided with auxiliary blades.

4. A multi-state sealed centrifugal pump as claimed in claim 1, characterized in that: The non-rotating ring comprises a retractable bellows or a spring, and the sealing surface of the non-rotating ring is arranged on a side of the bellows or the spring close to the rotating ring.

5. A multi-state sealed centrifugal pump as claimed in claim 1, characterized in that: The magnetic component is an electromagnetic component.

6. A multi-state sealed centrifugal pump as claimed in claim 5, characterized in that: The electromagnetic assembly comprises an electromagnetic coil sleeved outside the non-rotating ring, the non-rotating ring is arranged on a non-rotating ring mounting plate, and iron which can be adsorbed by the electromagnetic coil is mounted on the non-rotating ring mounting plate.

7. A multi-state sealed centrifugal pump as claimed in claim 6, characterized in that: A protection device for monitoring the temperature of the electromagnetic coil is also included.

8. A shutdown sealing mechanism according to claim 1, characterized in that: The rotating ring is mounted on a rotating ring mounting plate.

9. A shutdown sealing mechanism according to claim 8, characterized in that: The rotating ring mounting plate is ring-shaped.

10. A shutdown sealing mechanism according to claim 1, characterized in that: Also included is a heating device for heating the sealing surface.

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