CN117905722A

CN117905722A - Multi-state sealed centrifugal pump

Info

Publication number: CN117905722A
Application number: CN202311274067.XA
Authority: CN
Inventors: 贾鸿雷; 张毅; 王耀; 熊俊伟; 贺立红; 刘坤
Original assignee: Dalian Jili Tianjian Pump Co ltd; Wisdri Engineering and Research Incorporation Ltd
Current assignee: Dalian Jili Tianjian Pump Co ltd; Wisdri Engineering and Research Incorporation Ltd
Priority date: 2023-09-28
Filing date: 2023-09-28
Publication date: 2024-04-19

Abstract

The invention relates to the technical field of centrifugal pumps, and provides a multi-state sealed centrifugal pump which comprises a pump body with an inner space, wherein a pump cover is arranged on the pump body, the pump cover seals the pump body and forms an inner cavity in the pump body, the pump body is connected with a pump shaft, the pump shaft penetrates through the pump cover, one part of the pump shaft is arranged in the inner cavity, the other part of the pump shaft extends out of the pump body, a non-stop sealing mechanism is arranged in the inner cavity, a stop sealing mechanism is arranged outside the inner cavity, the stop sealing mechanism comprises a non-rotating ring and a rotating ring which are sleeved on the pump shaft, the non-rotating ring and the rotating ring are both provided with sealing surfaces, and the stop sealing mechanism also comprises a magnetic assembly for driving the sealing surfaces of the non-rotating ring to be attached to the sealing surfaces of the rotating ring. The multi-state sealed centrifugal pump provided by the invention has the advantages that the shutdown sealing mechanism and the non-shutdown sealing mechanism are matched, so that the centrifugal pump has a sealing function both in operation and non-operation.

Description

Multi-state sealed centrifugal pump

Technical Field

The invention relates to the technical field of centrifugal pumps, in particular to a multi-state sealed centrifugal pump.

Background

The problems of high maintenance probability, low pump efficiency, high mechanical energy loss, high energy medium consumption caused by adopting mechanical seal isolating liquid and the like all the time plagues practitioners when centrifugal pumps are generally adopted in the fields of chemical industry, metallurgy, environmental protection and the like for conveying fluid media, and shaft seals of the centrifugal pumps are frequently burnt out and liquid leakage is caused. Especially when the medium is easy to crystallize, contains solid particles, has higher temperature (higher than 150 ℃), and the like, the shaft seal is easy to damage, thereby causing a large amount of leakage of process medium and influencing the stability of a process system, safety, environmental protection and other factors. Specifically: when the shaft seal adopts power seal, the auxiliary impeller in the pump is utilized to rotate in the auxiliary impeller chamber to form a negative pressure area, so that medium in the pump cannot pass through the auxiliary impeller chamber and the auxiliary impeller along the pump shaft to generate leakage, and the medium can be leaked in a large amount when the pump is stopped although the pump can realize effective seal when the pump is in operation. Therefore, when the shaft seal is usually combined with the shutdown seal, the shutdown seal at present is generally filled with a filler, a coil pipe, a spring type seal and the like, so that the sealing performance is poor, and particularly the shutdown seal is easy to fail under the conditions that a process medium is easy to crystallize and scale is easy to cause, and a machine seal isolating liquid is required to be arranged.

Disclosure of Invention

The invention aims to provide a multi-state sealed centrifugal pump, which can at least solve part of defects in the prior art.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions: the utility model provides a multi-state sealed centrifugal pump, includes the pump body that has the inner space, install the pump cover on the pump body, the pump cover shutoff the pump body and in form the inner chamber in the pump body, the pump body has connect the pump shaft, the pump shaft runs through the pump cover, just the pump shaft is partly arranged in the inner chamber, another part stretches out to outside the pump body, be equipped with non-stop sealing mechanism in the inner chamber, be equipped with stop sealing mechanism outside the inner chamber, stop sealing mechanism is including the cover establish on the pump shaft non-rotating ring and rotating ring, non-rotating ring with the rotating ring all has sealed face, stop sealing mechanism is still including being used for driving the sealed face laminating of non-rotating ring magnetic force assembly of the sealed face of rotating ring.

Further, the power sealing structure comprises an impeller with a guide flow passage and an auxiliary vane chamber positioned in the inner cavity, wherein the auxiliary vane chamber is internally provided with an auxiliary impeller, and the auxiliary vane chamber is positioned at one side of the impeller close to the pump cover.

Further, the impeller is provided with auxiliary blades.

Further, the non-rotating ring comprises a telescopic corrugated pipe or a spring, and the sealing surface of the non-rotating ring is arranged on one side of the corrugated pipe or the spring, which is close to the rotating ring.

Further, the magnetic assembly is an electromagnetic assembly.

Further, 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 arranged on the non-rotating ring mounting plate.

Further, a protection device for monitoring the temperature of the electromagnetic coil is also included.

Further, the rotating ring is mounted on a rotating ring mounting plate.

Further, the rotating ring mounting plate is annular.

Further, the sealing surface heating device is also included.

Compared with the prior art, the invention has the beneficial effects that: a multi-state sealed centrifugal pump has a sealing function when the centrifugal pump is in operation or not in operation due to the cooperation of a stop sealing mechanism and a non-stop sealing mechanism.

Drawings

Fig. 1 is a schematic cross-sectional view of a defoaming device (with a self-flushing structure) according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a defoaming device according to an embodiment of the present invention (with a motor shaft lengthened and a self-flushing structure);

fig. 3 is a schematic cross-sectional view of a defoaming device according to an embodiment of the present invention (with a maintenance-free sealing function);

fig. 4 is a schematic cross-sectional view of a front view of a defoaming device (with a remote defoaming function) according to an embodiment of the present invention;

Fig. 5 is a schematic cross-sectional view of a front view of a defoaming device according to an embodiment of the present invention (having a maintenance-free sealing function and a remote defoaming function);

fig. 6 is a schematic diagram of a top view of a defoaming device according to an embodiment of the present invention;

FIG. 7 is a schematic side view of an electromagnetic filter according to an embodiment of the present invention;

Fig. 8 is a schematic top view of an electromagnetic filter according to an embodiment of the present invention;

fig. 9 is a schematic front view of an electromagnetic filter according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of a system for treating iron sludge according to an embodiment of the present invention;

FIG. 11 is a top view of FIG. 10;

Fig. 12 is a schematic structural view of an iron mud collecting box according to an embodiment of the present invention;

FIG. 13 is a schematic view of a centrifugal pump according to an embodiment of the present invention;

FIG. 14 is a state diagram of a shutdown sealing mechanism at shutdown provided by an embodiment of the present invention;

FIG. 15 is a state diagram of a run-time shutdown seal mechanism provided by an embodiment of the invention;

FIG. 16 is a schematic illustration of a defoaming device (with shutdown sealing mechanism) provided in an embodiment of the present invention;

fig. 17 is a schematic diagram (with a self-locking structure) of a defoaming device according to an embodiment of the present invention;

FIG. 18 is a schematic diagram of a self-locking structure of a defoaming device according to an embodiment of the present invention;

fig. 19 is a schematic diagram of an embodiment of the present invention when a self-locking structure of a defoaming device is not locked.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Embodiment one:

Referring to fig. 1,2 and 6, an embodiment of the present invention provides a self-flushing structure, which includes a guide member 200 that can extend to a portion to be flushed and a driving member for driving flushing fluid to flow along the guide member 200 to the portion to be flushed, wherein the guide member 200 is in a shape of a cover, a cover body of the guide member 200 in a shape of a cover is a guide surface, and the driving member is disposed in a region covered by the cover body. In this embodiment, the guide member 200 is designed to be a cover, and the member to be rinsed can be disposed at the center of the guide member 200, so that the rinsing liquid driven by the driving member can flow along the cover toward the member to be rinsed, thereby achieving the effect of rinsing the member to be rinsed. And because the cover is adopted, the water-cooling type water-cooling device can have a wider range of diversion surfaces, thereby achieving better flushing effect. The purpose of flushing may be decontamination or cooling. The driving piece is arranged in the interval of the cover cap of the cover body, so that the structure is more compact on one hand, and more driving modes of different types are convenient to design on the other hand.

Referring to fig. 1, 2 and 6, the driving member includes a secondary impeller 14 for generating suction, and the secondary impeller 14 is installed directly under the casing. In this embodiment, when the impeller 14 rotates, a certain suction force is formed in the housing to suck the rinse liquid up the housing, and when the rotation speed is very fast, the sucked rinse liquid flows along the extending direction of the housing and then flows onto the member to be rinsed. Of course, this is one of the driving modes, but it is also possible to use a structure having suction force such as a pump to suck the rinse liquid to guide it onto the member to be rinsed, and this embodiment is not limited thereto.

Referring to fig. 1,2 and 6, the cover includes an arcuate plate, and the arcuate plate forms the flow guiding surface with a smooth curved surface. In this embodiment, the arcuate guide surface is used to facilitate "climbing" of the rinse solution onto the member to be rinsed.

Further to the above, referring to fig. 1, 2 and 6, the curved plate is curved in a direction away from the driving member. In the embodiment, the whole arc plate is in an outward expansion mode, just like a pot cover, the arc plate is covered, and the rising of flushing fluid and the diversion of the flushing fluid are facilitated. Of course, reverse bending is also possible, which is not limited by this embodiment.

As an optimization scheme of the embodiment of the present invention, referring to fig. 1, 2 and 6, the arcuate plates have a plurality of arcuate plates, and two adjacent arcuate plates are spliced. In this embodiment, the cover may be formed by splicing multiple plates, for example, by welding, or in other splicing modes, which is beneficial for transportation and assembly. The assembly is preferably in a sealed state. Of course, if one plate is integrally formed, the effect is better. The splicing mode can adopt welding, bonding and the like.

As an optimization scheme of the embodiment of the present invention, referring to fig. 1,2 and 6, the cover body includes a flat plate that is obliquely arranged, and an inclined surface of the flat plate is the flow guiding surface. In this embodiment, instead of using an arcuate plate, it is also possible to use an inclined plate, which also facilitates the "climbing" of the flushing liquid up the plate onto the piece to be flushed.

As an optimization scheme of the embodiment of the present invention, referring to fig. 1,2 and 6, the flat plate has a plurality of flat plates, and two adjacent flat plates are spliced. In this embodiment, the plate may be a plurality of plates, and may be integrally formed by splicing.

As an optimization scheme of the embodiment of the present invention, referring to fig. 1,2 and 6, the device further includes a liquid storage tank 201, and the other end of the cover extends into the liquid storage tank 201. In this embodiment, when the defoaming impeller 13 attracts foam into the housing 5 and defoaming is performed, a portion of the liquid medium that hits the inner wall of the housing 5 enters the liquid reservoir 201, thereby facilitating the supply of the liquid medium to the flow guide 200.

As an optimization of the embodiment of the present invention, referring to fig. 1,2 and 6, the secondary impeller 14 has a flow channel through which a liquid medium passes. In this embodiment, the secondary impeller 14 also has a flow passage for the liquid medium to pass through, so as to facilitate the rising of the liquid medium.

Embodiment two:

Referring to fig. 1,2 and 6, an embodiment of the present invention provides a defoaming device, which includes a housing 5 and a defoaming impeller 13 for defoaming foam, wherein the defoaming impeller 13 is disposed in the housing 5, the housing 5 has a suction section 17 for foam to enter the housing 5, and the self-flushing structure 20 of the second embodiment is further included, and the self-flushing structure 20 is disposed in the housing 5. In this embodiment, the self-flushing structure 20 is arranged in the housing 5, so that the defoaming device has the capability of self-flushing the component for driving the defoaming impeller 13 to rotate, no external pipeline is required for flushing, the installation difficulty is reduced, and the energy is saved. Preferably, the housing 5 may take one of a cylindrical shape and a rectangular shape. Preferably, the defoaming impeller 13 may be one or more combined type impellers, which may be of the axial flow type or of the fan type. In addition, the impeller can be a plate-type welded impeller or a cast impeller. The suction section 17 is welded with a horn mouth below the suction pipeline, so that the suction area is enlarged, and the suction efficiency is improved.

As an optimization scheme of the embodiment of the present invention, referring to fig. 1,2 and 6, the motor further includes a motor 10 disposed on the housing 5, a motor shaft 100 of the motor 10 extends into the housing 5, and the defoaming impellers 13 are all mounted on the motor shaft 100. In the present embodiment, when the above-described driving member employs the sub-impeller 14, the sub-impeller 14 is also mounted on the motor shaft 100. The component for driving the defoaming impeller 13 to rotate can be a motor 10, and the auxiliary impeller 14 and the defoaming impeller 13 can be driven to rotate by the motor 10. After the foam is removed by the defoaming impeller 13, the auxiliary impeller 14 also attracts the liquid medium to rise to the flow guiding piece 200, the liquid medium on the flow guiding piece 200 flows down after flowing onto the piece to be flushed, and then the defoamed liquid medium below is mixed again and is attracted and rises again, so that the self-circulation flushing of the piece to be flushed is realized. Preferably, the motor 10 may be one of a power frequency motor 10 and a variable frequency motor 10, one of explosion-proof and non-explosion-proof, and one of efficient and general type. And clamping the whole motor shaft 100 at one time, and turning the whole motor shaft at one time. The part successfully solves the problem of reliable connection between the motor 10 and the defoaming impeller 13, has good concentricity and reliable and stable operation of the device.

As an optimization of the embodiment of the present invention, referring to fig. 1, 2 and 6, the sealing structure 18 is further included for sealing the motor shaft 100. In this embodiment, the sealing structure 18 is used to seal the motor 10 in order to avoid damage to the motor 10 caused by liquid entering the motor 10.

Further optimizing the above technical solution, referring to fig. 1, 2 and 6, the sealing structure 18 is a mechanical sealing structure 18, and the flow guiding member 200 extends to the mechanical sealing structure 18. In this embodiment, the mechanical seal structure 18 may be adopted as the sealing manner, and the mechanical seal structure 18 is the most effective and stable one in the sealing manner, but the mechanical seal needs to be washed and cooled, and in this embodiment, the medium to be defoamed may be just adopted to flow to the mechanical seal structure 18 along the flow guiding element 200 for cooling, and the above-mentioned element to be washed may be the mechanical seal structure 18 here, so that new water is not needed to be adopted for cooling any more, and the production cost can be greatly saved. In addition, the flow guiding member 200 covers the medium, and can also cooperate with the sealing structure 18 to play a certain role in sealing, because the self-circulation flushing is realized, meanwhile, the liquid is guided to flow downwards, the foam flow and the liquid flow in the container are completely isolated from the motor 10, and the foam flow or the liquid flow caused by the positive pressure or the negative pressure formed by the easily foaming medium in the container cannot damage the motor 10. Preferably, the mechanical seal may comprise one of a non-containerized mechanical seal and an containerized mechanical seal. The function of which is to effectively seal off the foam flow and the medium flow along the shaft into the motor 10 or the external environment.

Further optimizing the above technical solution, referring to fig. 1, 2 and 6, the sealing box 19 is disposed outside the mechanical sealing structure 18, and the flow guide 200 passes through the sealing box 19 to the mechanical sealing structure 18. The sealing box 19 is adopted outside the mechanical sealing structure 18, so that the sealing effect can be improved.

As an optimization scheme of the embodiment of the present invention, referring to fig. 1, 2 and 6, a flow guiding box 16 is disposed 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, the sealing structure 18 and the auxiliary impeller 14, the defoaming impeller 13 rotates to form suction force, 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 breaks the foam by utilizing shearing force and compression effect generated by the impeller, gas and liquid are separated, liquid is thrown to the shell 5 along with inertia force, the liquid generated after defoaming flows into the flow guiding box 16 along the shell 5, and the flow guiding box 16 further dissipates energy of the fluid after defoaming and simultaneously disperses the fluid into the container, so as to avoid collision with foam flow. Preferably, the baffle box 16 is a plate welded multi-piece threaded structure. The upper surface of the suction section 17 is welded with a circle of cylinder which is connected with the shell 5 by screw threads.

As an optimization scheme of the embodiment of the present invention, referring to fig. 1,2 and 6, the liquid storage tank 201 is provided on the housing 5, and when the foam is sucked into the housing 5 by the foam-removing impeller 13 and is removed, a part of the liquid medium that hits the inner wall of the housing 5 enters into the liquid storage tank 201, and the part of the liquid medium flows to the sealing structure 18 along the flow guiding member 200 to wash and cool the sealing structure 18.

As an optimization of the embodiment of the present invention, referring to fig. 1,2 and 6, the present invention further includes a collar 15 disposed at the suction section 17. In the embodiment, the opening ring 15 is added between the suction inlet and the inner cavity of the defoaming impeller 13, so that the sealing of the suction inlet of the defoaming impeller 13 is increased, the abrasion is lightened, the suction force of the defoaming impeller 13 is improved, the inner circulation is prevented, and the efficiency of the defoaming impeller 13 is increased.

As an optimization scheme of the embodiment of the present invention, referring to fig. 1,2 and 6, the motor 10 is disposed on a mounting base 11, and the mounting base 11 is disposed above the housing 5. The mounting base 11 is mounted on top of the container in a size matching the container, and the motor 10 is directly connected to the mounting base 11, reducing the weight and volume of the device. Preferably, the mounting base 11 may be one of a circular flange, a square flange, and a steel frame.

As an optimization scheme of the embodiment of the present invention, referring to fig. 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 sucked is in a deeper position, a sliding bearing 6 may be provided at the shaft end to ensure stable and reliable operation of the shaft and parts thereon, when it is desired to lengthen the motor shaft 100 or the impeller connecting shaft 12. Preferably, the sliding bearing 6 comprises a box body, a wear-resistant bushing and a shaft sleeve, and the radial force generated by unstable rotation of a long shaft or during running is balanced through the effects of shock absorption and support realized by sliding friction between the bushing and the shaft sleeve. This part is fixed by welding brackets in the suction section 17.

Embodiment III:

Referring to fig. 3 and 6, an embodiment of the present invention provides a maintenance-free defoaming device, which is configured to perform deformation based on the defoaming device, eliminate a self-flushing structure 20, and add 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, wherein the defoaming impeller 13 is disposed in the housing 5, and the defoaming impeller 13 is coaxially connected with 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 further includes a maintenance-free sealing assembly 30 for sealing the motor shaft 100, and 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 maintenance-free seal assembly 30 prevents the ingress of liquid medium into the motor 10 from burning the motor 10.

As an optimization scheme of the embodiment of the present invention, referring to fig. 3 and 6, the maintenance-free sealing assembly 30 includes a dynamic ring and a static ring, and a gravity block that can drive the dynamic ring to abut against the motor shaft 100 when the static ring is stationary. In this embodiment, when the device stops running, the gravity block can make the dynamic and static rings fit the motor shaft 100 to realize stop sealing.

Further optimizing the above scheme, please refer to fig. 3 and 6, further comprising a secondary impeller 14 capable of generating a pressure opposite to the defoaming impeller 13, wherein the secondary impeller 14 is mounted on the motor shaft 100. In this embodiment, when the device works, the gravity block rotates to drive the static and dynamic rings, so that the static and dynamic rings are separated from the motor shaft 100, and the auxiliary impeller 14 works at this time, because the pressure direction of the static and dynamic rings is opposite to that of the defoaming impeller 13, the high-pressure medium is prevented from leaking into the sealing cavity where the maintenance-free sealing device is located when the device works, and the auxiliary impeller 14 matched with the static and dynamic rings can also play a role in balancing axial force.

For other structures of the defoaming device, please refer to the above embodiments, and the description thereof will not be repeated here.

Embodiment four:

Referring to fig. 4 and 6, an embodiment of the present invention provides a remote defoaming device, which includes 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 disposed in the housing 5, the housing 5 has a suction section 17 for allowing foam to enter the housing 5, and further includes an impeller connecting shaft 12, the defoaming impeller 13 is disposed on the impeller connecting shaft 12, and the impeller connecting shaft 12 is coaxially connected with a motor shaft 100 of the motor 10 through a coaxial sealing assembly 40. In this embodiment, when the defoaming distance is relatively long, an impeller connecting shaft 12 may be added to mount the defoaming impeller 13, so as to achieve a better defoaming effect. The impeller connection shaft 12 needs to be coaxially connected with the motor shaft 100, and the coaxial sealing assembly 40 can perform a sealing function to prevent the liquid medium from entering the motor 10 to burn the motor 10.

As an optimization of the embodiment of the present invention, referring to fig. 4 and 6, the coaxial sealing assembly 40 includes a coupling 400, and the impeller connecting shaft 12 and the motor shaft 100 are coaxially connected through the coupling 400. In this embodiment, the coupling 400 connects the motor shaft 100 and the impeller connecting shaft 12, and transmits the power and torque of the motor 10 to the shaft and the parts on the shaft, and meanwhile, the part can also be used as a safety device, so as to prevent the liquid medium from flowing into the motor 10 along the shaft, thereby causing the burning phenomenon of the motor 10.

Further optimizing the above, referring to fig. 4 and 6, the coaxial seal assembly 40 further includes bearings 401 for supporting the motor shaft 100 and the impeller connecting shaft 12. In the present embodiment, the bearing 401 may employ an angular contact ball bearing 401 and a deep groove ball bearing 401, which are capable of balancing both axial force and radial force. The part plays a supporting role on the shaft, reduces friction and abrasion, and reduces noise.

Further optimizing the above, referring to fig. 4 and 6, the coaxial seal assembly 40 further includes a bearing cover 402 for fixing the axial position of the bearing 401, and the bearing cover 402 is located between the coupling 400 and the bearing 401. In the embodiment, an oil cup or an oil injection pipeline and a valve are arranged on the gland, so that lubricating oil can be conveniently supplemented, and meanwhile, one or a combination of a packing seal, a framework oil seal, a labyrinth seal and a dry gas seal is arranged in the inner hole, so that oil leakage is avoided.

As an optimization scheme of the embodiment of the present invention, referring to fig. 4 and 6, a bearing seal box 403 is disposed outside the impeller connecting shaft 12. In this embodiment, the bearing seal housing 403 cooperates with the bearing gland 402 to isolate the bearing 401 from the external environment to form a closed space, and simultaneously support the bearing 401 to enable stable and reliable operation, the bearing seal housing 403 may be located in a container and in contact with a medium, and may be effectively isolated, and the bearing seal housing 403 may also be located outside the container.

As an optimization scheme of the embodiment of the present invention, referring to fig. 4 and 6, the sealing structure 18 for sealing is further included, and the sealing structure 18 is disposed on a side of the coaxial sealing assembly 40 near the suction section 17. In this embodiment, besides the above-mentioned coaxial sealing assembly 40, the sealing structure 18 may be used for sealing in a matching manner, and the sealing structure 18 may be used for sealing if the coaxial sealing assembly 40 fails to block the liquid medium, and the sealing structure 18 may also block the liquid medium from the motor 10.

Further optimizing the above scheme, referring to fig. 4 and 6, the sealing structure 18 may be the sealing structure 18 in the second embodiment, and the specific structure thereof will not be described herein.

Fifth embodiment:

Referring to fig. 5 and 6, an embodiment of the present invention provides a remote maintenance-free mechanical defoaming device, which is formed by combining the maintenance-free seal according to the third embodiment and the remote defoaming according to the fifth embodiment, so as to form a defoaming device with functions of maintenance-free seal and remote defoaming. Specifically, the device includes casing 5, be used for eliminating foam defoaming impeller 13 and be used for driving defoaming impeller 13 pivoted motor 10, defoaming impeller 13 establishes in casing 5, casing 5 has the confession foam gets into casing 5's suction section 17, still includes impeller connecting axle 12, defoaming impeller 13 establishes on impeller connecting axle 12, impeller connecting axle 12 with motor 10's motor shaft 100 passes through coaxial seal assembly 40 coaxial coupling, in coaxial seal assembly 40 is close to suction section 17's one side still is equipped with maintenance-free seal assembly 30. In this embodiment, when the defoaming distance is relatively long, an impeller connecting shaft 12 may be added to mount the defoaming impeller 13, so as to achieve a better defoaming effect. The impeller connection shaft 12 needs to be coaxially connected with the motor shaft 100, and the coaxial sealing assembly 40 can perform a sealing function to prevent the liquid medium from entering the motor 10 to burn the motor 10. Meanwhile, the maintenance-free sealing assembly 30 is adopted, so that a double sealing effect can be achieved, the sealing performance is greatly improved, and the device also has maintenance-free capability.

As an optimization scheme of the embodiment of the present invention, referring to fig. 5 and 6, the coaxial seal assembly 40 and the maintenance-free seal assembly 30 can be referred to as a third embodiment and a fourth embodiment, and will not be described herein.

Example six:

Referring to fig. 1 to 6, an embodiment of the present invention provides a defoaming device, which is a deformation performed on the basis of the second embodiment, and a good sealing effect can be achieved by removing the self-flushing structure 20. Specifically, the defoaming device comprises a shell 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 shell 5, the shell 5 is provided with a suction section 17 for foam to enter the shell 5, the defoaming device further comprises a secondary impeller 14 capable of generating a pressure direction opposite to that of the defoaming impeller 13, the secondary impeller 14 is arranged on the motor shaft 100, and the secondary impeller 14 is positioned on one side of the defoaming impeller 13 close to the motor 10. In this embodiment, since the pressure direction of the impeller 14 is opposite to the pressure direction generated by the defoaming impeller 13 when the impeller 14 is operated, the high-pressure medium is prevented from leaking to the motor 10 to burn the motor 10, and the impeller 14 can also play a role in balancing the axial force.

For other structures of the defoaming device, please refer to the second embodiment, and the description thereof is omitted.

Embodiment seven:

Referring to fig. 7, an embodiment of the present invention provides an alkali liquor circulation tank, and the defoaming device in each embodiment is used to defoam a reaction medium in the alkali liquor circulation tank.

As an optimization scheme of the embodiment of the invention, referring to fig. 7, the alkali liquor circulation tank further comprises an alkali liquor concentration online detection system and an alkali liquor concentration online detection method corresponding to the system. Specifically:

as shown in FIG. 7, the on-line detection method of the alkali liquor concentration comprises the following steps:

S1, acquiring alkali liquor concentration and corresponding alkali liquor surface tension, taking the alkali liquor concentration as a dependent variable y and the corresponding alkali liquor surface tension as an independent variable x, and establishing an alkali liquor concentration prediction model y=a ₀+a₁x+a₂x²+…+a_nxⁿ; wherein a ₀、a₁ to a _n are model parameters;

s2, training the alkali liquor concentration prediction model until the predicted alkali liquor concentration deviation is controlled within an allowable range;

S3, acquiring the surface tension of the real-time alkali liquor as an independent variable x _s, and substituting the independent variable x _s into a trained alkali liquor concentration prediction model to obtain a corresponding real-time alkali liquor concentration prediction value y _s;

s4, adjusting the concentration of the real-time alkali liquor to a set value of the concentration of the alkali liquor according to the predicted value y _s of the concentration of the real-time alkali liquor.

In some embodiments, the supply may specifically be a compressed air station.

Different from the off-line sampling assay mode adopted in the related art for alkali liquor concentration detection, the technical scheme of the present disclosure realizes the on-line detection of alkali liquor concentration, realizes the automatic control of alkali liquor concentration on the basis of the on-line detection of alkali liquor concentration, ensures the stability of alkali liquor concentration, ensures the cleaning quality of strip steel, and has small hysteresis. The surface tension of the alkali liquor represents the alkali liquor cleaning capability, and has good representativeness. The relationship between the alkali liquor concentration and the alkali liquor surface tension is established through a soft measurement method, and an alkali liquor concentration prediction model can be continuously learned through training, so that very high precision is achieved. In addition, the raw lye, desalted water or waste lye is supplemented based on the concentration of the lye, and the concentration fluctuation of the lye is small.

It should be noted that, the sequence of the steps S1, S2, S3, and S4 in the technical solution of the present disclosure is not limited, that is, the step S1 may be performed before the steps S2, S3, and S4, or performed after the steps S2, S3, and S4, or performed synchronously with the steps S2, S3, and S4. The order of the steps is not limited.

In one specific implementation scenario:

Firstly, collecting alkali liquor surface tension data under different alkali liquor concentrations, storing the alkali liquor surface tension data in an alkali liquor concentration on-line detection and automatic control computer, wherein the alkali liquor concentration data is collected through an off-line sampling test, the alkali liquor concentration is taken as a dependent variable y, the alkali liquor surface tension is taken as an independent variable x, an alkali liquor concentration prediction model y=a ₀+a₁x+a₂x²+…+a_nxⁿ is established, after certain data alkali liquor concentration and alkali liquor surface tension sample data are accumulated, regression training is carried out by using a least square method until the predicted alkali liquor concentration deviation is controlled within an allowable range based on the alkali liquor concentration and alkali liquor surface tension sample data.

And secondly, acquiring real-time data of the surface tension of the alkali liquor by an alkali liquor surface tension online detector, calling a trained alkali liquor concentration prediction model, and calculating the real-time alkali liquor concentration.

And finally, operating an alkali liquor concentration automatic control module. The automatic alkali liquor concentration control module compares the alkali liquor concentration set value data with the real-time alkali liquor concentration data, takes the liquid level of the electrolyte circulation tank and the liquid level of the alkali liquor circulation tank as constraint conditions, supplements desalted water if the real-time alkali liquor concentration is higher, and supplements original alkali liquor if the real-time alkali liquor concentration is lower. And if the concentration of the real-time alkali liquor is lower than a certain threshold value, discharging the waste alkali liquor to realize automatic control of the concentration of the alkali liquor. Ensures the stable concentration of alkali liquor and the cleaning quality of the strip steel.

The present disclosure also provides an alkali liquor concentration online detection system, which may be used to implement any one of the above-described alkali liquor concentration online detection methods, the alkali liquor concentration online detection system includes:

the modeling module is configured to acquire the alkali liquor concentration and the corresponding alkali liquor surface tension, and establish an alkali liquor concentration prediction model y=a ₀+a₁x+a₂x²+…+a_nxⁿ by taking the alkali liquor concentration as a dependent variable y and the corresponding alkali liquor surface tension as an independent variable x; wherein a ₀、a₁ to a _n are model parameters;

The training module is configured to carry out regression training on the lye concentration prediction model by using a least square method until the predicted lye concentration deviation is controlled within an allowable range;

the detection module is configured to acquire the surface tension of the real-time alkali liquor as an independent variable xs, and substitutes the independent variable xs into the trained alkali liquor concentration prediction model to obtain a corresponding real-time alkali liquor concentration prediction value ys;

and the alkali liquor concentration automatic control module is configured to adjust the real-time alkali liquor concentration to an alkali liquor concentration set value according to the real-time alkali liquor concentration predicted value ys.

As shown in fig. 7, the alkali concentration automatic control module comprises an alkali concentration on-line detection and automatic control computer, an industrial ethernet, an alkali washing process section PLC, a shut-off valve 1, a shut-off valve 2, a shut-off valve 3, a shut-off valve 4, a shut-off valve 5 and a shut-off valve 6. The detection module comprises a liquid level meter 1, a liquid level meter 2, an alkali liquor surface tension online detector 1 and an alkali liquor surface tension online detector 2. The alkali liquor concentration on-line detection and automatic control computer is communicated with the alkali washing process section PLC through an industrial Ethernet.

The online detection and automatic control computer of the alkali concentration is communicated with an alkali washing process section PLC to realize data acquisition and instruction issuing of the alkali washing process section, and the alkali washing process section PLC is connected with a liquid level meter 1, a liquid level meter 2, an online alkali liquid surface tension detector 1, an online alkali liquid surface tension detector 2, a cut-off valve 1, a cut-off valve 2, a cut-off valve 3, a cut-off valve 4, a cut-off valve 5 and a cut-off valve 6 to acquire real-time information such as the alkali liquid level of an electrolyte circulation tank, the alkali liquid level of the alkali circulation tank, the alkali liquid surface tension of the electrolyte circulation tank, the alkali liquid surface tension of the alkali circulation tank and the like. The automatic alkali liquor concentration control module compares the alkali liquor concentration set value data with the real-time alkali liquor concentration data, takes the liquid level of the electrolyte circulation tank and the liquid level of the alkali liquor circulation tank as constraint conditions, supplements desalted water if the real-time alkali liquor concentration is higher, and supplements original alkali liquor if the real-time alkali liquor concentration is lower. And if the concentration of the real-time alkali liquor is lower than a certain threshold value, discharging the waste alkali liquor to realize automatic control of the concentration of the alkali liquor. Ensures the stable concentration of alkali liquor and the cleaning quality of the strip steel.

Example eight:

As shown in fig. 8-10, the present embodiment provides an electromagnetic filter 100, which can be used in the first embodiment as the magnetic filter 15 therein.

The electromagnetic filter 100 comprises a filter tank 101, a filter disc 102 and an impurity collector 103, wherein the filter disc 102 comprises an annular bracket 1021, a plurality of electromagnetic chucks 1022 and an electric control unit for controlling the electromagnetic chucks 1022 to be powered off, the electromagnetic chucks 1022 are all arranged on the annular bracket 1021 and are sequentially and annularly distributed along the circumferential direction of the annular bracket 1021, and the annular bracket 1021 is provided with a rotary driving mechanism 105 for driving the rotary driving mechanism to rotate; the ring-shaped holder 1021 is partially located in the filtering tank 101, and the impurity collector 103 is disposed outside the filtering tank 101 and includes an impurity removing portion for driving impurities away from the electromagnetic chuck 1022.

In one embodiment, the annular support 1021 includes an inner ring frame and an outer ring frame, which are connected by a plurality of spokes, each spoke correspondingly dividing an annular area between the inner ring frame and the outer ring frame into a plurality of suction cup mounting positions, each suction cup mounting position being provided with an electromagnetic suction cup 1022.

Wherein, optionally, as shown in fig. 11, the spokes are distributed along the radial direction of the annular support 1021, and the inner ring frame-spoke-outer ring frame connection is formed in a hub shape.

The electromagnetic chuck 1022 is preferably removably mounted to the annular support 1021, including but not limited to by screw attachment.

The surface of the electromagnetic chuck 1022 is preferably coplanar with the corresponding side surface of the annular bracket 1021, so that impurities on the electromagnetic chuck 1022 can be removed conveniently, and dirt can be prevented from being accumulated due to the fact that corners are formed between the electromagnetic chuck 1022 and the annular bracket 1021.

Preferably, the annular support 1021 is connected to the rotation driving mechanism 105 through a support rotation shaft 104, and the rotation driving mechanism 105 drives the support rotation shaft 104 to rotate, so as to drive the annular support 1021 and the electromagnetic chuck 1022 on the annular support 1021 to rotate.

In one embodiment, the rotary driving mechanism 105 adopts a structure of a motor and a transmission assembly, and the transmission assembly can adopt a mode of sprocket transmission, belt pulley transmission and the like; the motor is preferably a variable frequency motor, and the rotation speed of the annular bracket 1021 can be controlled.

Preferably, the electric control unit comprises a plurality of electric control cables and electric control modules, the electric control cables are connected with the electromagnetic chucks 1022 in the same number and in a one-to-one correspondence manner, and each electric control cable is electrically connected with the electric control module.

In one embodiment, the support shaft 104 is a hollow shaft, and each of the electric control cables is routed through the hollow cavity of the support shaft 104. The mode can facilitate the layout of the electric control cable, and has high safety and reliability. Preferably, a wiring hole is formed on the annular bracket 1021 (for example, the inner ring frame) so as to facilitate the electric control cable to enter the bracket rotating shaft 104; a routing channel is also provided in the electromagnetic chuck 1022 to connect the electrical control cable with the coil in the electromagnetic chuck 1022.

Preferably, the annular bracket 1021 is detachably mounted on the bracket rotation shaft 104. In one embodiment, the stent rotation shaft 104 is designed in segments, and the annular stent 1021 is clamped between two rotation shaft segments 1041 of the stent rotation shaft 104 (typically, the inner ring frame is clamped between two rotation shaft segments 1041 of the stent rotation shaft 104); optionally, a shoulder is machined on the rotating shaft segment 1041, two ends of the inner hole of the inner ring frame respectively adopt a stepped hole structure, the journal portion at the end of the rotating shaft segment 1041 is inserted into the large-diameter hole segment in the corresponding side stepped hole structure, and the shoulder portion of the rotating shaft segment 1041 is abutted with the corresponding side end face of the inner ring frame and fixed by screws.

Further, when the shaft segment 1041 is assembled with the inner ring frame, the electromagnetic chuck 1022 may be further clamped between the two, for example, the outer ring wall of the inner ring frame adopts a stepped shaft structure, a clamping groove is formed between the shaft shoulder of one shaft segment 1041 and the large diameter wall body of the stepped shaft type outer ring wall, and the corresponding side end of the electromagnetic chuck 1022 is clamped in the clamping groove. The mode can improve the stability and reliability of installation of the electromagnetic chuck 1022, and particularly when an electric control cable needs to enter the electromagnetic chuck 1022 through the support rotating shaft 104, the structure can ensure the alignment accuracy between the wiring hole on the annular support 1021 and the wiring channel in the electromagnetic chuck 1022, so that faults such as damage to the electric control cable are avoided.

In one embodiment, the electronic control module comprises a central controller and an electrically conductive slip ring, each electronic control cable is connected with a rotor part of the electrically conductive slip ring, and the central controller is connected with a stator part of the electrically conductive slip ring. The rotor portion of the conductive slip ring is preferably mounted on the bracket shaft 104. With this structure, the electromagnetic chucks 1022 can be rotated normally, and reliable control of the power supply and the power failure of each electromagnetic chuck 1022 can be ensured.

Such central controllers include, but are not limited to, PLC controllers.

When the annular bracket 1021 drives each electromagnetic chuck 1022 to rotate, part of the electromagnetic chucks 1022 are immersed into the filter tank 101 from outside the filter tank 101, and part of the electromagnetic chucks 1022 leave the filter tank 101 and swing upwards; for the electromagnetic chuck 1022 on the upper pendulum, ferromagnetic impurities are adsorbed on the surface of the electromagnetic chuck 1022, and the carried liquid and the liquid in the adsorbed impurities can leave the electromagnetic chuck 1022 under the action of gravity, so that the effect of gravity dehydration can be achieved, the water content of the impurities collected in the impurity collector 103 is low, the subsequent treatment of the impurities is convenient, and the loss of the liquid in the filter tank 101 can be reduced.

In one embodiment, as shown in fig. 9 and 10, the filter disc 102 further includes a water blocking ring 1023, the water blocking ring 1023 is coaxially installed on the support shaft 104 and abuts against the disc surface of each electromagnetic chuck 1022, an annular water blocking edge is formed on the outer annular wall of the water blocking ring 1023 in a protruding manner, and the annular water blocking edge and each electromagnetic chuck 1022 enclose to form a water blocking groove. By arranging the water retaining ring 1023, the liquid can be well guided, and the liquid is prevented from entering the bracket rotating shaft 104 and other places to influence the normal operation of the electric control unit.

Among them, the water blocking ring 1023 is preferably provided in two and is arranged on both sides of the ring-shaped supporter 1021.

Preferably, a sealing gasket is sandwiched between the water retaining ring 1023 and the electromagnetic chuck 1022, so as to improve the water retaining effect.

In the impurity collecting station, the method of scraping the impurities on the surface of the electromagnetic chuck 1022 can be adopted, and the method of flushing the surface of the electromagnetic chuck 1022 by high-pressure water or high-pressure air can be adopted.

In one embodiment, as shown in fig. 8 to 10, the impurity removing unit includes a scraper 1031, and the working end of the scraper 1031 is in contact with the disk surface of the electromagnetic chuck 1022 at the impurity collecting site; the impurity collector 103 further includes an impurity collecting receptacle 1032, and the impurity collecting receptacle 1032 is engaged under the scraper 1031. The mode has low energy consumption and high working reliability.

Generally, since both side surfaces of the electromagnetic chuck 1022 can absorb foreign matters, it is preferable to provide the scraper 1031 and the foreign matter collecting groove 1032 on both sides of the annular bracket 1021, respectively; the interval between the working ends of the both side scrapers 1031 is preferably the same as the thickness of the electromagnetic chuck 1022.

Preferably, as shown in fig. 9 and 10, the above-described scraper 1031 is arranged obliquely, so that the scraped foreign substances can be easily dropped into the foreign substance collection groove 1032.

Alternatively, the working end of the above-mentioned scraper 1031 is a top end thereof, which is preferably parallel to the horizontal plane, that is, the contact line of the scraper 1031 with the electromagnetic chuck 1022 is parallel to the horizontal plane, which may facilitate the arrangement of the scraper 1031, the impurity collecting tank 1032, etc., and the collection of impurities.

Preferably, the scraper 1031 is a trough plate, and the length direction of the scraper 1031 is defined as the direction from the working end to the impurity collecting receptacle 1032, so that the two lateral ends of the scraper 1031 are respectively extended to form a wing plate, which can better restrain and guide the scraped impurities.

As a preferable solution of this embodiment, as shown in fig. 9 and 10, the filter disc 102 has a plurality of groups, each of the annular holders 1021 is sequentially mounted on the same holder rotation shaft 104, and the holder rotation shaft 104 is connected to the rotation driving mechanism 105. Providing multiple sets of filter discs 102 can improve filtration efficiency and filtration efficiency.

As shown in fig. 9, one impurity collection trough 1032 may be shared between two adjacent filter trays 102.

Preferably, as shown in fig. 9, 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, and preferably each liquid storage tank 1011 is provided with a filter disc 102; the number of the filter discs 102 and the liquid storage tanks 1011 is preferably the same and arranged in one-to-one correspondence.

In one embodiment, upstream wastewater may be simultaneously introduced into each of the reservoirs 1011.

In other embodiments, the tanks 1011 may be serially connected in sequence, the upstream sewage enters the first tank 1011 first, and the sewage circulates between the upstream tank 1011 and the downstream tank 1011 in an overflow manner, so that the sewage can be treated in a pipeline manner, continuous treatment can be realized, and the treatment effect and efficiency can be ensured. As shown in fig. 9, in the first-stage liquid storage tank 1011, the filter disc 102 is preferably arranged close to the sewage inlet, so that ferromagnetic impurities in the sewage can be captured at the first time, and the electromagnetic filtering effect is improved; in the tail tank 1011, the filter disc 102 is preferably disposed near the filtrate outlet, so that the cleanliness of the discharged filtrate can be improved.

In particular, based on the segmented design of the bracket spindle 104 described above, the installation and placement of each filter tray 102 may be facilitated; the number of the filter discs 102 can be increased or decreased as required, so that the flexibility is very high; and the maintenance of the equipment can be facilitated, for example, the disassembly and assembly of the filter disc 102 at the corresponding liquid storage tank 1011 can be carried out, and the filter treatment in other liquid storage tanks 1011 is not affected.

The method for using the electromagnetic filter 100 includes:

The electromagnetic chucks 1022 are driven to rotate by the annular bracket 1021, so that the electromagnetic chucks 1022 can circularly move among the working position, the water removal position and the impurity removal position,

In the working position, the electromagnetic chuck 1022 is powered and at least partially immersed in the filter tank 101 to adsorb ferromagnetic impurities in the filter tank 101;

In the dehydration position, the electromagnetic chuck 1022 is kept in an electrified state;

in the impurity removal position, the electromagnetic chuck 1022 is de-energized, and impurities are driven off from the electromagnetic chuck 1022 by the impurity removal unit and collected.

Example nine:

the alkali liquor circulation tank 11 in the seventh embodiment is provided with an iron mud treatment subsystem for online cleaning of iron mud impurities in the alkali liquor circulation tank 11, so that the running stability and reliability of the system and the cleaning quality of steel are improved, and the shutdown dredging time and frequency are reduced.

Preferably, the iron sludge treatment subsystem is coupled to the recirculation zone 111.

As shown in fig. 11 and 12, the iron sludge treatment subsystem comprises an intermediate medium circulation mechanism and an iron sludge recovery mechanism, wherein the intermediate medium circulation mechanism comprises a plurality of intermediate mediums 330 capable of extracting iron sludge at the bottom of the lye circulation tank 11, and a medium conveying unit 331, a medium transferring unit 332 and a medium reflux unit 333 which are sequentially connected, the medium conveying unit 331 is communicated with an intermediate medium outlet of the lye circulation tank 11, and the medium reflux unit 333 is communicated with an intermediate medium inlet of the lye circulation tank 11; the iron sludge recycling mechanism includes a flushing unit disposed above the medium relay unit 332 and an iron sludge collection tank 321 disposed below the medium relay unit 332.

In one embodiment, the intermediate medium 330 includes a steel ball for holding the iron mud, so that the iron mud at the bottom of the container can be conveniently carried out. For the iron mud at the bottom of the container, the iron mud is wrapped by steel balls which flow in a laminated way, and the iron mud is taken out of the alkali liquor circulation tank 11 through the medium conveying unit 331; when the surface of the medium steel ball is designed to have a certain roughness, the iron mud wrapping effect can be improved, and in one embodiment, the surface roughness Ra of the medium steel ball is more than or equal to 0.8 mu m, and is more preferably controlled to be less than or equal to 12 mu m.

In one embodiment, as shown in fig. 11, a slope is arranged at the bottom of the lye circulation tank 11, the slope slopes from the middle medium inlet to the middle medium outlet, so that the middle medium 330 can circulate in the container conveniently, for example, medium steel balls can run from the middle medium inlet to the middle medium outlet by means of gravity, and the medium steel balls at the high place can squeeze and drive the medium steel balls at the low place and the iron mud on the slope, so that the bottom of the container is ensured to move all the time based on the circulation of the medium steel balls, the phenomenon of iron mud accumulation can be reduced, the intervention of power equipment can be saved, and meanwhile, the slope is also beneficial to the deposition of the iron mud to the middle medium outlet so that the middle medium 330 can bring the iron mud out conveniently.

In one embodiment, the medium conveying unit 331 described above employs a screw pump or a screw conveyor, which may be disposed obliquely or horizontally depending on the relative positional relationship between the intermediate medium outlet and the medium relay unit 332.

In one embodiment, as shown in fig. 11 and 12, the medium relay unit 332 employs a chain conveyor unit, for example, a drag chain conveyor or a chain conveyor. Accordingly, the media relay unit 332 includes a top link layer 3321 and a bottom link layer 3322.

Wherein the link plate gap of the chain conveyor unit is smaller than the size of the intermediate medium 330, e.g. smaller than the diameter of the medium steel balls.

The medium conveying unit 331 is connected to the upper chain layer 3321, for example, a medium output port of the medium conveying unit 331 is located right above the upper chain layer 3321, and the medium conveying unit 331 can convey the medium 330 onto the upper chain layer 3321; optionally, a hopper is disposed above the upper chain layer 3321, through which the intermediate medium 330 outputted from the medium conveying unit 331 is received and transferred onto the upper chain layer 3321, and it is possible to avoid a situation in which the intermediate medium 330 is ejected out of the upper chain layer 3321 due to an excessively large drop distance.

Wherein the medium return unit 333 is arranged at the outlet side of the chain conveyor unit. Optionally, the above-mentioned medium return unit 333 employs a conveyor table for transporting the cleaned intermediate medium 330 back to the lye circulation tank 11.

The flushing unit is used for flushing the intermediate medium 330 on the medium transferring unit 332, so that the separation of the iron mud and the intermediate medium 330 can be realized. In one embodiment, as shown in fig. 12, the flushing unit includes a flushing pipe 351, at least one set of spraying structures may be disposed at the bottom of the flushing pipe 351, and when there are multiple sets of spraying structures, the spraying structures are sequentially disposed along the conveying direction of the intermediate medium 330; each set of spray structures includes at least one nozzle, and when there are a plurality of nozzles in the spray structures, the nozzles in the spray structures are preferably arranged in sequence along the width direction of the medium relay unit 332.

Further, as shown in fig. 12, the above-mentioned rinsing unit further includes a rinsing liquid supply pipe 352, and the rinsing liquid supply pipe 352 is connected to the rinsing pipe 351 for supplying rinsing liquid. Preferably, the surface water of the lye circulation tank 11 is used as the rinse liquid, and accordingly, the above-mentioned rinse liquid supply pipe 352 is connected to the upper portion of the lye circulation tank 11.

The rinse liquid may exit through both sides of the media relay unit 332, and/or the media relay unit 332 may be a hollow-out type conveying device, such as may exit through a flight gap of the chain type conveying unit. In one embodiment, as shown in fig. 11 and 13, the iron sludge recycling mechanism further includes a drainage unit 322, the drainage unit 322 is disposed between the upper chain layer 3321 and the lower chain layer 3322 of the medium relay unit 332, a top inlet of the drainage unit 322 is located directly below the flushing unit, and a bottom outlet of the drainage unit 322 is located directly above the iron sludge collection tank 321. Based on the design, the flushing liquid can be reliably drained into the iron mud collecting box 321, so that the field environment is cleaner; at the same time, the flushing water carrying the iron sludge is prevented from polluting the lower chain layer 3322, so that the working reliability of the medium transfer unit 332 is correspondingly improved, and the maintenance frequency of the medium transfer unit is reduced.

Preferably, as shown in fig. 11 and 13, the drainage unit 322 has an inverted Y-shaped structure, and forms a drainage inlet pipe and two drainage outlet pipes; the two drainage outlet pipes can ensure the drainage efficiency and effect of flushing liquid on one hand, and on the other hand, the arrangement of the lower chain layer 3322 is also convenient, for example, the lower chain layer 3322 is positioned between the two drainage outlet pipes.

Wherein the upper strand layer 3321 may be disposed in the drainage inlet tube so that the intermediate medium 330 and the iron sludge splashed by the high-pressure jet can be captured well.

Preferably, as shown in fig. 11 and 13, the drainage unit 322 is integrally connected to the iron mud collection tank 321, and for example, an outer frame 3221 of the drainage unit 322 having the inverted Y-shaped structure is integrally formed with the iron mud collection tank 321 to form a top-closed tank, and an inverted V-shaped mud guard 3222 is provided in the tank to form an inner frame of the drainage unit 322.

In one embodiment, a protective screen 323 is further disposed around the winding layer 3321 of the medium relay unit 332, and a protective area of the protective screen 323 covers at least a flushing area of the winding layer 3321. By providing the protection net 323, the high-pressure jet stream can be prevented from ejecting the intermediate medium 330 out of the medium relay unit 332.

The protection net 323 can perform side protection, optionally, the protection net 323 includes two-sided side wall net plates 3231, and the two-sided side wall net plates 3231 are separately arranged at two sides of the conveying channel of the medium transfer unit 332; the side screen 3231 is preferably not movable with the media relay unit 332, for example, it is mounted by a screen bracket, and for the above-described arrangement with the drainage unit 322, the side screen 3231 may be mounted on the outer frame 3221 of the drainage unit 322.

And/or, the protection net 323 may perform upper protection, and optionally, the protection net 323 includes a top net plate 3232, and the top net plate 3232 is disposed above the medium relay unit 332; the top mesh plate 3232 is preferably not movable with the medium relay unit 332, and the installation manner of the top mesh plate 3231 can be used as a reference.

Further optimizing the above-mentioned iron sludge treatment subsystem, as shown in fig. 11 and 12, the iron sludge recycling mechanism further comprises a filtering unit, and the iron sludge collecting tank 321 is provided with a washing liquid recycling pipe connected to the filtering unit.

Optionally, the filtrate from the filtration unit may be reused as flushing fluid, for example, the filtrate outlet pipe of the filtration unit may be connected to a flushing fluid reservoir to which the flushing fluid supply pipe 352 is also connected. When the rinsing liquid adopts surface water of the lye circulation tank 11, the filtrate produced by the filtering unit may be refluxed into the lye circulation tank 11, and correspondingly, a filtrate outlet pipe of the filtering unit is connected with the lye circulation tank 11.

Wherein, the iron mud collecting tank 321 can adopt overflow mode to control the direction of the flushing liquid, and the flushing liquid recycling pipe is connected at the overflow liquid level of the iron mud collecting tank 321. Heavier impurities are deposited at the bottom of the iron sludge collection bin 321 and may be cleaned periodically or aperiodically.

In one embodiment, the filtering unit comprises electromagnetic filtering equipment for removing ferromagnetic impurities in the flushing liquid, and the ferromagnetic impurities suspended in the flushing liquid can be reliably adsorbed and removed; the electromagnetic filter device is preferably an electromagnetic filter 100 provided in the third embodiment described above.

Example ten:

Referring to fig. 13, 14 and 15, an embodiment of the present invention provides a shutdown sealing mechanism, which includes a non-rotating ring 810 and a rotating ring 809 that can be sleeved on the same shaft, where the non-rotating ring 810 and the rotating ring 809 each have a sealing surface, and the shutdown sealing mechanism 800 further includes a magnetic assembly for driving the sealing surface of the non-rotating ring 810 to adhere to the sealing surface of the rotating ring 809. Upon shutdown, the magnetic assembly will drive the sealing surface of the non-rotating ring 810 against the sealing surface of the rotating ring 809, effecting a seal at the interface. Specifically, the shutdown sealing mechanism 800 may be used on any shaft-bearing component, such as a centrifugal pump and a defoaming device, and the shutdown sealing mechanism 800 may be matched with other sealing forms, such as a mechanical seal, a power seal, a maintenance-free seal, etc., and all sealing forms mentioned in the following embodiments may be matched with the shutdown sealing mechanism 800, so that a good sealing effect can be achieved regardless of shutdown or non-shutdown. The present shutdown seal mechanism 800 may employ a magnetic assembly to facilitate the engagement and disengagement between the sealing surface of the non-rotating ring 810 and the sealing surface of the rotating ring 809.

Referring to fig. 13, 14 and 15, the non-rotating ring 810 is further refined, where the non-rotating ring 810 includes a bellows or a spring, and the sealing surface of the non-rotating ring 810 is disposed on a side of the bellows or the spring close to the rotating ring 809. The telescopic structure forms of metal corrugated pipes, springs and the like can be adopted, and the magnetic force components are adopted to provide suction force to realize the telescopic structure forms.

Further optimizing the above scheme, please refer to fig. 13, 14 and 15, the magnetic assembly is an electromagnetic assembly. The magnetic force component can adopt an electromagnetic component, and the characteristic that electromagnetic electricity is obtained and magnetism is lost is utilized, so that the automatic driving of the non-rotating ring 810 is realized.

For further details of the above electromagnetic assembly, please refer to fig. 13, 14 and 15, the electromagnetic assembly includes an electromagnetic coil 806 sleeved outside the non-rotating ring 810, the non-rotating ring 810 is disposed on a non-rotating ring mounting plate 807, and iron that can be absorbed by the electromagnetic coil 806 is mounted on the non-rotating ring mounting plate 807. In this embodiment, the attraction force generated by the electromagnetic coil 806 may be used to attract the iron pieces, or the like on the non-rotating ring mounting plate 807. The non-rotating ring mounting plate 807 and the rotating ring mounting plate 811 are both annular to facilitate installation of the mating shaft.

Specifically: referring to fig. 13, 14 and 15, the shutdown sealing mechanism 800 is located at the rear side of a pump cover 804, the pump cover 804 is a pump cover 804 of a centrifugal pump, and includes a non-rotating ring 810 sleeved on a shaft sleeve 808 and mounted on the pump cover 804, a rotating ring 809 sleeved on the shaft sleeve 808 and located at the rear side of the non-rotating ring 810, and an electromagnetic coil 806, wherein the non-rotating ring 810 adopts a metal bellows or spring and sealing ring structure, one end far away from the rotating ring 809 is fixed on the pump cover 804, the other end is free, the electromagnetic coil 806 is sleeved outside the non-rotating ring 810 and fixed on the pump cover 804, and when in operation, the electromagnetic coil 806 is electrified through an external circuit to generate magnetic attraction to the non-rotating ring mounting plate 807, so that the sealing surfaces of the rotating ring 809 are separated; when the power is turned off during the stop, the electromagnetic coil 806 loses magnetism and is separated 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 the close state.

Referring to fig. 13, 14 and 15, the electromagnetic coil 806, which is energized to generate magnetism, attracts the non-rotating ring mounting plate 807 to make them fit completely, thereby compressing the bellows to keep the free end of the non-rotating ring 810 away from the rotating ring 809, and avoiding problems of abrasion of the sealing surface and loss of mechanical energy between the two.

Referring to fig. 13, 14 and 15, the present shutdown sealing mechanism 800 achieves sealing at shutdown: when the motor is stopped, the electromagnetic coil 806 which is in power failure and loses magnetism is separated from the non-rotating ring mounting plate 807, the free end of the non-rotating ring 810 moves to the rotating ring 809 under the pressure action of the corrugated pipe to be re-attached to the sealing surface of the rotating ring 809, the sealing at the butt joint is realized, an electric heater is arranged on the sealing surface of the rotating ring 809, the abrasion of the sealing surface caused by accumulation of a crystallized medium can be avoided, the non-rotating ring 810 adopts a metal corrugated pipe structure, the high temperature resistance, the end surface abrasion resistance is good, the bearing capacity is high, the operation is stable, a labyrinth seal can be formed by an elastic metal ring sheet in the non-rotating ring 810, the abrasion and corrosion of the medium to the sleeve 808 and the pump shaft 802 are avoided, a sealing ring does not need to be arranged, the problem of deterioration and failure of the sealing ring under the condition of high temperature (> 150 ℃) is solved, the mechanical sealing isolation liquid is not needed, the friction resistance is reduced, the good following property and the shock resistance are realized, the vibration and the deflection tolerance to the pump shaft 802 is large, meanwhile, the electromagnetic coil 806 is provided with a temperature sensor, the motor 10 is controlled in a power linkage, once the electromagnetic coil 806 is over high in temperature, the motor 10 is disconnected immediately, and the durability to the high temperature medium below 350 ℃. The centrifugal pump has high durability to dangerous media which are easy to crystallize, scale, fixed at normal temperature, inflammable, explosive and the like, and can be widely applied to the fields of chemical industry, metallurgy and environmental protection fluid medium transportation.

Referring to fig. 13, 14 and 15, in the present embodiment, the electromagnetic coil 806 is sleeved outside the non-rotating ring 810 and fixed on the pump cover 804, the iron sheet for achieving the adsorption in cooperation with the electromagnetic coil is fixed on the non-rotating ring mounting plate 807, the non-rotating ring 810 with bellows is fixed on the pump cover 804, and the rotating ring 809 sleeved on the shaft sleeve 808 and fixed on the rotating ring mounting plate 811 rotates with the shaft. In operation, the non-rotating ring mounting plate 807 approaches and conforms under the magnetic force generated by the electromagnetic coil 806, and simultaneously compresses the non-rotating ring 810 to separate its sealing surface from the sealing surface of the rotating ring 809, ensuring that the sealing surfaces conform closely during shutdown and disengage during operation, based on the calculation of the compression of the non-rotating ring 810.

Referring to fig. 13, 14 and 15, in the present embodiment, a non-rotating ring 810 is mounted on the rear side of a pump cover 804 by a spacer and a screw, one end of a rotating ring 809 remote from the non-rotating ring 810 is fixed on a non-rotating ring mounting plate 807 by a screw, the non-rotating ring mounting plate 807 is fixed on a shaft sleeve 808, and the rotating ring 809 and the non-rotating ring 810 are mounted in a simple and reliable manner.

Referring to fig. 13, 14 and 15, in this embodiment, the rear end of the pump shaft 802 is engaged through the bearing 9 and then externally driven. The bearing 9 is provided on the bearing bracket 805.

Referring to fig. 13, 14 and 15, in the present embodiment, the device further includes a protection device 815, where the protection device 815 includes a temperature sensor, monitors the temperature of the coil and is interlocked with the motor 10, and when the temperature in the coil exceeds a certain temperature, the power supply is immediately turned off to prevent the circuit from burning and the sealing surface from wearing.

Referring to fig. 13, 14 and 15, in this embodiment, the sealing device further includes a heating device 816, where the heating device 816 is installed on the seal to heat the sealing surface. For media that are prone to crystallization, fouling, even if collected around the sealing surface, it is difficult to form crystals that cause frictional damage to the sealing surface.

Example eleven:

Referring to fig. 13, 14 and 15, an embodiment of the present invention further provides a centrifugal pump having the shutdown sealing mechanism 800 of the tenth embodiment, which can perform a sealing function during shutdown. Specifically, the centrifugal pump comprises a pump body 801, the pump body 801 is connected with a rotatable pump shaft 802, a non-rotating ring 810 and a rotating ring 809 are sleeved on the pump shaft 802, the non-rotating ring 810 and the rotating ring 809 are provided with sealing surfaces, and the shutdown sealing mechanism 800 further comprises a magnetic force assembly for driving the sealing surface of the non-rotating ring 810 to be attached to the sealing surface of the rotating ring 809. In this embodiment, the shutdown sealing mechanism 800 is used in a centrifugal pump, so that a good shutdown sealing effect can be achieved, and the sealing performance is better than that of the conventional shutdown sealing mode.

Referring to fig. 13, 14 and 15, the pump body 801 is further refined, 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 may serve as a component fixing function.

Referring to fig. 13, 14 and 15, the non-rotating ring 810 is fixedly mounted to the pump cap 804. In this embodiment, the non-rotating ring 810 does not rotate, so it can be fixedly mounted with the pump cap 804.

Referring to fig. 13, 14 and 15, as an optimization scheme of the embodiment of the present invention, a shaft sleeve 808 is sleeved on the pump shaft 802, and the non-rotating ring 810 and the rotating ring 809 are sleeved on the shaft sleeve 808. The provision of this sleeve 808 facilitates the installation of the non-rotating ring 810 and the rotating ring 809.

Referring to fig. 13, 14 and 15, the electromagnetic coil 806 is sleeved outside the non-rotating ring 810 and is fixed on the pump cover 804.

As for other components of the shutdown sealing mechanism 800, see the above embodiments, the description thereof will not be repeated here.

So far, the centrifugal pump does not need frequent maintenance, has small mechanical energy loss, does not need mechanical sealing isolating liquid, and has high durability to the medium easy to crystallize/scale.

Embodiment twelve:

Referring to fig. 13, 14 and 15, the embodiment of the present invention further provides a centrifugal pump, which not only has the shutdown sealing mechanism 800, but also has the non-shutdown sealing mechanism 800, and the two sealing mechanisms cooperate to realize the sealing function of both the operation and the non-operation of the centrifugal pump. The non-stop sealing mechanism 800 may include the sealing structure in any of the above embodiments, and the power sealing structure is described in this embodiment, and other sealing forms will not be described herein.

Specifically, this centrifugal pump includes the pump body 801 that has the inner space, install pump cover 804 on the pump body 801, pump cover 804 shutoff pump body 801 and in form the inner chamber in the pump body 801, pump body 801 connects pump shaft 802, pump shaft 802 runs through pump cover 804, just pump shaft 802 is partly arranged in the inner chamber, another part stretches out to outside the pump body 801, be equipped with non-stop seal mechanism 800 in the inner chamber, be equipped with stop seal mechanism 800 outside the inner chamber, stop seal mechanism 800 includes the cover and establishes non-rotation ring 810 and the rotation ring 809 on pump shaft 802, non-rotation ring 810 with rotation ring 809 all has the sealing surface, stop seal mechanism 800 still includes the order about the sealing surface of non-rotation ring 810 laminating the magnetic force subassembly of the sealing surface of rotation ring 809.

As an optimization scheme of the embodiment of the present invention, please refer to fig. 13, 14 and 15, and the detailed structure of the above-mentioned shutdown seal mechanism 800 is referred to embodiment ten and embodiment eleven, which are not repeated here. The power seal structure is specifically refined next.

As an optimization scheme of the embodiment of the present invention, referring to fig. 13, 14 and 15, the power sealing structure includes an impeller 814 with a guide flow channel, and a secondary vane chamber 803 located in the inner cavity, where the secondary vane chamber 803 is provided with a secondary impeller 14, and the secondary vane chamber 803 is located on a side of the impeller 814 close to the pump cover 804. In this embodiment, the secondary impeller 14 rotates within the secondary impeller chamber 803 to create a negative pressure region so that the medium within the pump does not leak along the pump shaft 802 past the secondary impeller chamber 803 and secondary impeller 14, and also avoids the corrosive, high temperature, solid particle-containing medium from damaging the back side components of the secondary impeller 14.

As an optimization scheme of the embodiment of the present invention, please refer to fig. 13, 14 and 15, the impeller is provided with auxiliary blades. In this embodiment, the secondary vanes may reduce the impeller back pressure to balance the pump shaft 802 forces when the centrifugal pump is not shut down.

Embodiment thirteen:

Referring to fig. 13, 14, 15 and 16, an embodiment of the present invention provides a defoaming device, which has a shutdown sealing mechanism 800 and a non-shutdown sealing mechanism 800 according to the above embodiment, where the shutdown sealing mechanism 800 is a maintenance-free sealing mechanism, and is not easy to wear, does not need to be washed, reduces energy consumption, and is convenient to install and use. While the non-stop seal mechanism 800 may be used with any of the above embodiments, such as the mechanical seal structure 18, the present embodiment is described with a dynamic seal structure, and the mechanical seal structure 18 may be used with a dynamic seal structure. In this embodiment, the power seal structure is mainly mentioned, and other seal forms will not be described again.

Specifically, referring to fig. 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 in the housing 5, an impeller connecting shaft 12 of the defoaming impeller 13 is coaxially connected with 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 further includes a shutdown sealing mechanism 800 for sealing the motor shaft 100, and the shutdown sealing mechanism 800 is disposed on a side of the defoaming impeller 13 away from the suction section 17. In this embodiment, sealing at the interface may be achieved by shutdown sealing mechanism 800 when the defoamer is out of service.

In particular, referring to fig. 13, 14, 15 and 16, the shutdown sealing mechanism 800 includes a non-rotating ring 810 and a rotating ring 809 that can be sleeved on the impeller connecting shaft 12, the non-rotating ring 810 and the rotating ring 809 each have a sealing surface, and the shutdown sealing mechanism 800 further includes a magnetic assembly for driving the sealing surface of the non-rotating ring 810 to fit the sealing surface of the rotating ring 809. Additional details regarding the shutdown sealing mechanism 800 are provided in the tenth embodiment, and will not be described in detail herein. The non-rotating ring 810 and the electromagnetic coil 806 are fixed on the pump cover 804, and when the electromagnetic coil 806 is electrified to attract the non-rotating ring mounting plate 807 to approach and attach, so that the sealing surface of the rotating non-rotating ring 810 is separated, and the two cannot be worn; when the parking electromagnetic coil 806 is de-energized to release the non-rotating ring mounting plate 807, the sealing surface of the rotating non-rotating ring 810 is re-engaged. This portion increases the sealing performance of the centrifuge, blocks leakage of process media and foam, avoids motor 10 burnout accidents and affects the surrounding environment, and also reduces wear of the sealing surfaces.

As an optimization scheme of the embodiment of the present invention, please refer to fig. 13, 14, 15 and 16, further comprising a power seal structure, wherein the power seal structure is disposed between the defoaming impeller 13 and the shutdown seal mechanism 800. In this embodiment, the power sealing structure is provided, so that the sealing effect can be achieved when the defoaming device is operated, and the shutdown sealing mechanism 800 can also achieve the sealing effect when the defoaming device is stopped, 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 auxiliary impeller 14 is adopted in the power sealing structure and rotates at a certain angular speed, so that the pressure direction of the auxiliary impeller is opposite to the pressure direction generated by the defoaming impeller 13, and the high-pressure medium is prevented from leaking into a sealing cavity where the shutdown sealing mechanism 800 is positioned when the device operates, and the auxiliary impeller 803 matched with the auxiliary impeller can also play a role in balancing axial force. This is also described in detail in the above embodiments, and will not be described again here.

As an optimization of the embodiment of the present invention, referring to fig. 13, 14, 15 and 16, the mounting base 11 is mounted on the top of the container in a size matching the container, and the motor 10 is firmly coupled to the mounting base 11 by means of the motor frame 91. The motor 10 drives the defoaming impeller 13 to rotate through the impeller connecting shaft 12, the shaft expansion sleeve 813, the auxiliary impeller 14 and the shutdown sealing mechanism 800, suction force is formed after the defoaming impeller 13 rotates, foam generated on the surface of a container is sucked into an inlet of the defoaming impeller 13 through a suction section 17 arranged along the shape of the container, the defoaming impeller 13 breaks up the foam by utilizing shearing force and compression effect generated by the impeller, gas and liquid are separated, liquid is thrown to the shell 5 along with inertia force, the liquid generated after defoaming flows into the diversion box 16 along the shell 5, and the diversion box 16 disperses the fluid into the container while further dissipating energy after defoaming, so that the conflict with foam flow is avoided.

The shutdown sealing mechanism 800 is matched with the auxiliary impeller 14 to completely isolate foam flow and liquid flow in the container from the motor 10, when the motor is in operation, the power seal ensures that medium in the pump cannot pass through the auxiliary impeller 14 along the impeller connecting shaft 12 to leak, meanwhile, the external circuit is connected with a power supply, the electromagnetic coil 806 generates magnetism to attract the non-rotating ring mounting plate 807 to compress the corrugated pipe on the non-rotating ring 810, so that the magnetic surface of the coil is adsorbed and attached to the non-rotating ring mounting plate 807, the non-rotating ring mounting plate 807 pulls the free end of the non-rotating ring 810 to be far away from the rotating non-rotating ring 810, the problems of sealing surface abrasion and mechanical energy loss cannot occur between the non-rotating ring mounting plate 807 and the rotating non-rotating ring 810, when the motor is shut down, under the control of the time relay, the external circuit is powered off when the motor 10 is powered off for 2-3 seconds, the non-rotating ring 810 is attached to the sealing surface of the rotating non-rotating ring 810 again, and the sealing at the butt joint is realized.

The positive or negative pressure induced foam flow or liquid flow created by the formation of the foamable medium within the container does not cause damage to the motor 10. Even if the shutdown seal mechanism 800 and the secondary impeller 14 are damaged, the foam flow or the liquid flow is intercepted by the shaft coupling expansion sleeve 813, and the motor 10 is not damaged. The electric heater is arranged on the sealing surface of the rotary non-rotating ring 810, so that the abrasion of the sealing surface caused by the accumulation of the easily crystallized medium can be avoided, meanwhile, the electromagnetic coil 806 is provided with a temperature sensor and is controlled in linkage 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 the durability of the motor is high for the high-temperature medium below 350 ℃. The opening ring 15 is added between the suction inlet pipeline and the inner cavity of the defoaming impeller 13, so that the sealing of the suction inlet of the impeller is increased, the abrasion is lightened, the suction force of the defoaming impeller 13 is improved, the inner circulation is prevented, and the effect of the defoaming impeller 13 is improved.

Fourteen examples:

The embodiment of the invention provides a defoaming device, which comprises a shell 5, a defoaming impeller 13 for eliminating foam, a motor 10 for driving the defoaming impeller 13 to rotate, wherein the defoaming impeller 13 is arranged in the shell 5, the defoaming impeller 13 is coaxially connected with a motor shaft 100 of the motor 10, the shell 5 is provided with a suction section 17 for allowing foam to enter the shell 5, and the defoaming device further comprises a maintenance-free sealing assembly 30 and a shutdown sealing mechanism 800 for sealing the motor shaft 100, and the maintenance-free sealing assembly 30 and the shutdown sealing mechanism 800 are arranged on one 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 provided in the same defoaming device, and it is understood from the above embodiment that the shutdown sealing mechanism 800 is also a maintenance-free structure. Therefore, the sealing during stopping and non-stopping can be realized by the cooperation of the two, and the maintenance-free function can be completely realized.

Specifically, referring to fig. 3 and 16, a maintenance-free seal assembly 30 and a shutdown seal mechanism 800 are respectively embodied, and both may be disposed on the impeller connecting shaft 12, where the maintenance-free seal assembly 30 may be disposed below the shutdown seal mechanism 800, and the maintenance-free seal assembly 30 may be used to seal during operation, and the shutdown seal mechanism 800 may be used to seal during shutdown.

For details of the maintenance-free seal assembly 30 and the shutdown seal mechanism 800, reference is made to the above embodiments, and details thereof are not repeated herein.

Example fifteen:

Embodiments of the present application provide a defoaming device that includes a self-locking structure 90, where the self-locking structure 90 may be used in any of the embodiments described above. Specifically, referring to fig. 17, 18 and 19, 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, wherein the defoaming impeller 13 is disposed in the housing 5, the housing 5 has a suction section 17 for the foam to enter the housing 5, the device further includes a transmission shaft 92, the defoaming impeller 13 is locked on the transmission shaft 92 through a self-locking structure 90, and the transmission shaft 92 is coaxially disposed with a motor shaft 100 of the motor 10. In this embodiment, the self-locking structure 90 is adopted to prevent the phenomenon that the defoaming impeller 13 vibrates too much and even the defoaming impeller 13 falls off when loosening, so that the defoaming impeller has good stability and shockproof performance. Specifically, the existing lock nut cannot achieve a stable locking effect when the motor 10 has forward rotation and reverse rotation, and the self-locking structure 90 can ensure that the defoaming impeller 13 is locked on the transmission shaft 92, so that various problems caused by the fact that locking cannot be performed are avoided.

For further details of the self-locking structure 90, referring to fig. 17, 18 and 19, the self-locking structure 90 includes a self-locking nut 95 screwed on the end of the transmission shaft 92, a locking block 96 capable of being attached to the transmission shaft 92, and a driving member for pushing the locking block 96 to be tightly pressed on the transmission shaft 92, where the locking block 96 is installed on the self-locking nut 95. In this embodiment, by using the locking block 96 to tightly fit on the transmission shaft 92 and the locking block 96 to be mounted on the self-locking nut 95, the self-locking nut 95 is carried with it to be stably locked on the transmission rod after it is pressed against the transmission shaft 92.

As a more preferable solution, referring to fig. 17, 18 and 19, the locking block 96 may be embedded in the self-locking nut 95, so that the volume of the self-locking structure 90 may be reduced, specifically, a groove may be formed by recessing the inner wall of the self-locking nut 95 near the inner wall, the locking block 96 may be disposed in the groove, so that the locking of the self-locking nut 95 on the transmission rod is not affected, and after the self-locking nut 95 is locked, the locking block 96 is pushed by the driving member to press on the transmission shaft 92, so that the locking nut is ensured not to be separated from the transmission rod no matter whether the transmission shaft 92 is transmitting or reversing. Preferably, the size of the groove body is consistent with that of the locking block 96, and the locking block 96 can completely enter the groove body in a design mode, so that the consistency of the locking nut is higher, and if the design accuracy is high, the locking block 96 is not seen even in the locking nut. Typically, the threaded connection is relatively tight after the lock nut is threaded onto the drive rod, but after locking by the lock block 96, a secure locking can be achieved by friction. The orientation of cell body is unanimous with the direction that latch segment 96 removed, and so the cell body also can play certain guide effect, avoids the latch segment 96 to take place the skew in horizontal direction because receiving the extrusion in the body of rod screwing process, makes latch segment 96, the body of rod, lock nut three balanced and stable at the terminal realization self-locking effect of transmission shaft 92.

For further details of the driving member, referring to fig. 17, 18 and 19, the driving member includes a rod body, the self-locking nut 95 has a hole for the rod body to pass through, and the rod body is connected with the locking block 96. The locking block 96 may be pushed by a rod passing through the hole. Preferably, the rod body is a threaded rod 97, the hole is a threaded hole, the rod body is in threaded connection with the threaded hole, and the position of the threaded rod 97 can be fixed through the form of the threaded hole, so that the threaded rod 97 can be screwed tightly, and the effect of increasing pressure is achieved. It is of course also possible to keep the rod body pressed against the locking block 96 all the time by means of an external construction, which is not limited in this embodiment.

Thus, the motor 10 can be stably locked in both forward and reverse directions by adopting the self-locking structure 90. During operation, the self-locking nut 95 is arranged at the tail end of the transmission shaft 92 and clings to the hub of the defoaming impeller 13, the self-locking nut 95 can support the hub of the defoaming impeller 13 to enable the hub to rotate stably, vibration is reduced, meanwhile, due to the stable operation of the defoaming impeller 13, the bearing 9 connected with the self-locking nut is also enabled to operate stably, a double vibration reduction effect is achieved on the whole structure, moreover, the friction force between the locking block 96 and the transmission shaft 92 is increased by means of the pressure applied to the locking block 96 by screwing the threaded rod 97, so that the stable self-locking effect is achieved, stable operation and fixing effect of parts on the transmission shaft 92, which follow the rotation of the shaft, are guaranteed, the phenomenon that the defoaming impeller 13 and the bearing 9 are separated due to loosening of the self-locking nut 95 is avoided, meanwhile, through holes at two ends of the self-locking nut 95 are all in a threaded structure so that the threaded rod 97 is fixed, and the threaded rod 97 is enabled to have the effect of increasing pressure. The self-locking nut 95 has good stabilizing effect on the transmission shaft 92 and parts on the shaft, and can be widely applied to the field of vertical rotor structural equipment which relates to forward and reverse high-speed rotation of the motor 10.

The specific operation is as follows: when the motor 10 rotates positively in operation, the motor 10 is provided with the transmission shaft 92, and the transmission shaft 92 drives the defoaming impeller 13 to rotate in the same direction with the self-locking nut 95, so that a good fixing effect can be realized; because the threaded rod 97 is screwed up against the inner locking block 96, the locking block 96 is tightly attached to the transmission shaft 92, even if the motor 10 is reversed to cause the rotation direction of the defoaming impeller 13 to be opposite to the rotation direction of the self-locking nut 95, the stable rotation of the defoaming impeller 13 and the fixing effect of parts on the transmission shaft 92 can be ensured still by virtue of the friction force between the locking block 96 and the transmission shaft 92.

As an optimization scheme of the embodiment of the present invention, referring to fig. 17, 18 and 19, the bottom plate 94 is placed on the housing 5, the motor 10 is arranged in the motor frame 91, and the motor frame 91 is arranged on the bottom plate 94. The transmission shaft 92 is fixedly connected with the motor shaft 100 through the shaft connecting expansion sleeve 813, so that the transmission shaft 92 and the motor shaft 100 are reliably connected, power output by the motor 10 is efficiently transmitted to the transmission shaft 92 and the parts on the shaft, meanwhile, vibration can be reduced, the running stability of equipment is improved, vibration of the defoaming impeller 13 is reduced, and the axial force born by the self-locking nut 95 is also reduced, so that the service life of the self-locking nut 95 is prolonged. The motor frame 91 upper end plane cooperatees with motor 10 tang, and bottom plate 94 is connected to the lower extreme, and sealing assembly is held to bottom plate 94, connects the outside box of bearing 9 and bush simultaneously, and box inside axle sleeve 808 is connected on transmission shaft 92, and axle sleeve 808 lower extreme defoaming impeller 13 passes through the key to be connected with transmission shaft 92, and at transmission shaft 92 terminal screw thread department, prevent reversing self-locking nut 95 with the screw thread direction revolve to defoaming impeller 13 wheel hub bottom surface to make latch segment 96 further lock on transmission shaft 92 through tightening self-locking nut 95 both ends threaded rod 97. When the motor 10 rotates reversely, the friction force between the locking block 96 and the transmission shaft 92 is far greater than the anti-rotation friction force between the defoaming impeller 13 and the self-locking nut 95, so that the self-locking nut 95 can be firmly connected.

As an optimization scheme of the embodiment of the present invention, referring to fig. 17, 18 and 19, a flow guiding box 16 is disposed 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 sealing structure 18, the defoaming impeller 13 rotates to form a suction force, 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 breaks bubbles by utilizing the shearing force and the compression effect generated by the impeller, gas and liquid are separated, liquid is thrown to the shell 5 along with the inertia force, the liquid generated after defoaming flows into the flow guiding box 16 along the shell 5, and the flow guiding box 16 further dissipates energy of the fluid after defoaming and simultaneously disperses the fluid into the container, so that the collision with foam flow is avoided. Preferably, the baffle box 16 is a plate welded multi-piece threaded structure. The upper surface of the suction section 17 is welded with a circle of cylinder which is connected with the shell 5 by screw threads.

As an optimization of the embodiment of the present invention, referring to fig. 17, 18 and 19, the present device further includes a sealing assembly for preventing foam flow and medium in the housing 5 from entering the motor 10. The manner of sealing may be by way of a mechanical seal structure 18, the mechanical seal structure 18 being the most effective and robust one of the seal forms, and the mechanical seal may include one of a non-containerized mechanical seal and an containerized mechanical seal. The function of which is to effectively seal off the foam flow and the medium flow along the shaft into the motor 10 or the external environment. The mechanical sealing mechanism is used for dynamic sealing of a rotating part, micro leakage or zero leakage of a medium can be realized by matching with a proper flushing scheme, and the device for preventing the fluid leakage is formed by at least one pair of end faces perpendicular to a rotating axis, which are kept in fit and relatively slide under the action of fluid pressure and elasticity (or magnetic force) of a compensating mechanism and the matching of auxiliary sealing, and is arranged on a shaft, so that the device is a common sealing mode in the prior art.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A multi-state sealed centrifugal pump, characterized by: including the pump body that has the inner space, install the pump cover on the pump body, the pump cover shutoff the pump body and in form the inner chamber in the pump body, the pump body has connect the pump shaft, the pump shaft runs through the pump cover, just the pump shaft is arranged in to one part in the inner chamber, another part stretches out to outside the pump body, be equipped with non-stop sealing mechanism in the inner chamber, the outer sealing mechanism that stops of inner chamber, stop sealing mechanism is including the cover establish non-rotation ring and the rotation ring on the pump shaft, non-rotation ring with the rotation ring all has sealed face, stop sealing mechanism is still including being used for driving the sealed face laminating of non-rotation ring the magnetic force subassembly of the sealed face of rotation ring.

2. A multi-state sealed centrifugal pump according to claim 1, wherein: the power sealing structure comprises an impeller with a guide flow passage and an auxiliary vane chamber positioned in the inner cavity, wherein the auxiliary vane chamber is internally provided with an auxiliary impeller, and the auxiliary vane chamber is positioned at one side of the impeller close to the pump cover.

3. A multi-state sealed centrifugal pump according to claim 1, wherein: the impeller is provided with auxiliary blades.

4. A multi-state sealed centrifugal pump according to claim 1, wherein: the non-rotating ring comprises a telescopic corrugated pipe or a spring, and the sealing surface of the non-rotating ring is arranged on one side of the corrugated pipe or the spring, which is close to the rotating ring.

5. A multi-state sealed centrifugal pump according to claim 1, wherein: the magnetic force component is an electromagnetic component.

6. A multi-state sealed centrifugal pump according to claim 5, wherein: 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 arranged on the non-rotating ring mounting plate.

7. A multi-state sealed centrifugal pump according to claim 6, wherein: a protection device for monitoring the temperature of the electromagnetic coil is also included.

8. A shutdown seal mechanism as defined in claim 1 wherein: the rotating ring is mounted on the rotating ring mounting plate.

9. A shutdown seal mechanism as defined in claim 8 wherein: the rotating ring mounting plate is annular.

10. A shutdown seal mechanism as defined in claim 1 wherein: and a heating device for heating the sealing surface.