CN217794678U - Defoaming mechanism and defoaming device - Google Patents

Abstract

The utility model relates to a defoaming technical field provides a defoaming mechanism, including defoaming impeller group, still including supplying defoaming chamber that defoaming impeller group settled and can inhale the foam extremely scalable journey of inhaling in the defoaming chamber runner, scalable journey of inhaling has the body that can stretch into in the container of treating the defoaming, cavity chamber in the body is established, just seted up on the body and supplied the foam to get into a plurality of through-holes of cavity chamber, the defoaming chamber with cavity chamber intercommunication. Still provide a fire fighting equipment, including motor protective structure and foretell fire fighting equipment. The utility model adopts the expandable suction path, which can avoid the direct overflow of the foam far away from the defoaming device due to the size of the container; by adopting a multi-layer impeller structure, the impeller can adopt a combination form of a fan-shaped impeller and a multi-wing centrifugal impeller, and foam is efficiently crushed while the suction pressure difference and the processing capacity of the foam are increased.

Description

Defoaming mechanism and defoaming device

Technical Field

The utility model relates to a defoaming technical field specifically is a defoaming mechanism and fire fighting equipment.

Background

In the fields of steel, chemical industry, medicine, food and the like, the adopted chemical medium is easy to generate some foams which are not beneficial to production due to the production requirement. If the foam is not treated effectively in time, it can cause damage to the production process and equipment, damage to the production equipment, affect the product quality, and even reduce the production capacity. For example, in the field of steel strip processing, a degreasing stage is required to clean the surface of rolled steel strip containing contaminants such as grease, scale powder, iron powder, and carbon powder. Because the degreasing agent contains surfactant components, the degreasing agent can wrap air to generate a large amount of foam under the influence of stirring and temperature factors, and the foam overflows from the container to cause damage to a peripheral motor and environmental pollution. The foam can affect the cleaning effect of the strip steel after overflowing into the strip steel cleaning tank.

At present, chemical defoaming methods for adding a defoaming agent into a foaming medium are mostly adopted for defoaming, and patents ZL200820218185.3 and ZL200820012731.8 disclose defoaming methods and equipment for adding a defoaming agent. However, the defoaming agent used in such chemical defoaming method generally has an inhibiting effect on the active ingredients in the foaming medium, and even partially generates precipitates to block the pipelines and equipment of the system. The defoaming agent is continuously added according to the condition of the medium easy to foam, so that the mass production cost is consumed, and the defoaming agent generally contains organic silicon or polyether and other organic matters difficult to degrade, so that the difficulty and the cost of water treatment are increased. If a common mechanical defoaming mode is adopted, the container storing the medium easy to foam is stored, and as the medium easy to foam can cause the pressure change in the container and the obvious ascending air flow formed after the foam is broken can carry the unbroken foam to flow over the impeller, the foam can damage mechanisms such as a motor of the mechanical defoaming device and even directly overflow out of the container to cause harm.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a defoaming mechanism and fire fighting equipment can solve the partial defect among the prior art at least.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions: a defoaming mechanism comprises a defoaming impeller group, a defoaming chamber for the defoaming impeller group to be arranged, and an expandable suction path which can suck foam into the defoaming chamber, wherein the expandable suction path is provided with a body which can extend into a container to be defoamed, a hollow chamber is arranged in the body, a plurality of through holes for the foam to enter the hollow chamber are formed in the body, and the defoaming chamber is communicated with the hollow chamber.

Furthermore, the body is of a frame-shaped structure, a columnar structure or a strip-shaped diverging structure, the strip-shaped diverging structure comprises a plurality of air suction pipes, one end of each air suction pipe is gathered together to form a gathering part, the other end of each air suction pipe diverges outwards by taking the gathering part as the center, and the through holes are formed in the air suction pipes.

Further, the defoaming impeller group comprises one or more combined impellers.

Further, the impeller is a multi-wing centrifugal impeller, a fan-shaped impeller, a plate-type welded impeller or a cast impeller.

Further, a needle-shaped structure is arranged on the impeller.

Further, the defoaming device comprises a secondary defoaming box, wherein the defoaming chamber is arranged in the secondary defoaming box, and the inner wall of the secondary defoaming box is provided with a needle-shaped structure.

And the foam breaking device further comprises a diversion box body used for draining the liquid after the foam breaking and dissipating energy, and the diversion box body is communicated with the defoaming chamber.

Further, the defoaming device also comprises a gas outlet used for releasing gas after the foam is broken, and the gas outlet is communicated with the defoaming chamber.

Further, the exhaust port is connected with an exhaust pipeline system.

The embodiment of the utility model provides another kind of technical scheme: a defoaming device comprises a motor protection structure and the defoaming mechanism.

Compared with the prior art, the beneficial effects of the utility model are that:

1. through the cooperation of first seal assembly and second seal assembly, can protect the motor omnidirectionally, even first seal assembly damages and can't play good effect that blocks, the second seal assembly also can protect, ensures that no fluid gets into and causes the damage to the motor.

2. The inclined planes of the outer fastening ring and the inner fastening ring are matched, so that the expansion is ensured to be larger, the fastening force is larger, and the impeller shaft is ensured to be firmly fastened on the motor shaft.

3. The motor shaft and the impeller shaft adopt a socket structure, and the concentricity of the motor shaft and the impeller shaft can be ensured.

4. By adopting the expandable suction flow channel, the phenomenon that foam far away from the defoaming device directly overflows due to the size of the container can be avoided.

5. By adopting a multi-layer impeller structure, the impeller can adopt a combination form of a fan-shaped impeller and a multi-wing centrifugal impeller, and foam is efficiently crushed while the suction pressure difference and the processing capacity of the foam are increased.

Drawings

Fig. 1 is a front view of a defoaming device provided in an embodiment of the present invention;

fig. 2 is a top view of a defoaming device provided in an embodiment of the present invention;

fig. 3 is an enlarged schematic view of a second sealing assembly for a defoaming device according to an embodiment of the present invention;

in the reference symbols: 1-a defoaming mechanism; 10-an impeller shaft; 11-a motor; 110-motor shaft; 111-a base; 12-defoaming impeller group; 13-defoaming chamber; 14-expandable suction lift runner; 140-a through hole; 15-secondary defoaming box; 150-needle structure; 160-a diversion box body; 17-an exhaust port; 18-a choma; 19-mounting a base; 2-motor protection structure; 20-a first seal assembly; 21-a second seal assembly; 210-a blocking face; 211-an inner fastening ring; 212-an outer fastening ring; 213-fastening bolts; 22-motor bracket; 23-bearing means.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, 2 and 3, an embodiment of the present invention provides a motor protection structure for a defoaming device, including a first sealing assembly 20 and a second sealing assembly 21, both of which can be mounted on an impeller shaft 10, wherein the first sealing assembly 20 and the second sealing assembly 21 are arranged at an interval, and the second sealing assembly 21 is arranged near a base 111 of the motor 11; the first sealing assembly 20 is used for blocking fluid transmitted by the defoaming mechanism 1 of the defoaming device, the second sealing assembly 21 is used for preventing the fluid passing through the first sealing assembly 20 from entering the interior of the motor 11, and the size of the blocking surface 210 of the second sealing assembly 21 is larger than that of the hole on the base 111 of the motor 11 for extending the driving shaft. In this embodiment, through the cooperation of the first sealing component 20 and the second sealing component 21, the motor 11 can be protected in all directions, and even if the first sealing component 20 is damaged and cannot have a good blocking effect, the second sealing component 21 can also be protected to ensure that the motor 11 is damaged by fluid entering. Specifically, when defoaming mechanism 1 defoams, there is the fluid splash, can block the fluid through first seal assembly 20, and when this first seal assembly 20 breaks down and can't block, still second seal assembly 21 can block the fluid, and the safety of motor 11 can be guaranteed to the duplicate protection. Preferably, the fluid may be a foam stream, a liquid stream or a gas stream, which is caused by a positive or negative pressure of the foamable medium in the container.

As an optimized solution of the embodiment of the present invention, please refer to fig. 1, fig. 2 and fig. 3, the first sealing assembly 20 includes a mechanical sealing mechanism, a packing sealing mechanism, a labyrinth sealing mechanism, a spiral sealing mechanism, a dry gas sealing mechanism or an oil sealing mechanism. In this embodiment, the first sealing assembly 20 may be one of a mechanical seal, a packing seal, a labyrinth seal, a spiral seal, a dry gas seal and an oil seal, which are all existing sealing manners, such as a mechanical seal, and is used for dynamic sealing of a rotating part, and by matching with a proper flushing scheme, a slight leakage or zero leakage of a medium can be realized, and the device for preventing fluid leakage, which is formed by that at least one pair of end faces perpendicular to the rotating axis are kept in fit and relatively slide under the action of fluid pressure and the elastic force (or magnetic force) of a compensating mechanism and the matching of an auxiliary seal, is arranged on the impeller shaft. For another example, the packing sealing mechanism is a dynamic sealing device which can generate pressing force between the packing and the rotating and fixing parts by the action of pretension or self-tightening of medium pressure, and mainly comprises the packing, a packing box and a packing fixing part, and the packing box can be arranged on the impeller shaft. Like a labyrinth sealing mechanism, a series of regular throttling gaps and expansion cavities are formed between a sealing cavity and a rotating shaft by a group of sealing tooth sheets, when gas flows through the gaps formed by the sealing teeth and the surface of the shaft, the gas flow is subjected to a primary throttling effect, the pressure and the temperature of the gas flow are reduced, the flow speed is increased, and a larger cavity formed by two sealing teeth is formed after the gas flow passes through the gaps, so that the sealing effect is realized. Say again spiral sealing mechanism, the scheme in application number CN 03266296.3's the utility model patent, through being provided with the multi-thread spiral notch of anti-rotation direction on the relative surface of rotating ring, quiet ring, constitute a series of direct vent pressure boost blades, form and pump entry to export unanimous additional flow along the spiral notch, the optimal design reaches this additional flow and two ring gap's reflux flow mutually to realize sealed. For another example, the dry gas sealing mechanism is a novel shaft end seal which uses the slotting sealing technology for gas sealing, and belongs to non-contact sealing. And finally, the oil seal sealing mechanism is a self-tightening lip seal, has the advantages of simple structure, small size, low cost, convenience in maintenance and small resistance torque, can avoid medium leakage and can also avoid invasion of external dust and other harmful substances, and the liquid material is extracted by the centrifugal principle to realize sealing.

As an optimized solution of the embodiment of the present invention, please refer to fig. 1, fig. 2 and fig. 3, the second sealing assembly 21 includes a blocking ring unit that can be sleeved on the impeller shaft 10 and a locking unit that locks the blocking ring assembly on the impeller shaft 10, and a size of a blocking surface 210 formed by a combined structure of the locking unit and the blocking ring unit is larger than a size of the hole. In this embodiment, the second sealing assembly 21 is formed by a blocking ring unit and a locking unit, and the blocking ring is annular and can block the hole of the base 111. The blocking ring unit can be firmly locked to the impeller shaft 10 by the locking unit while the impeller shaft 10 can be firmly fastened to the motor shaft 110. Preferably, the bearing device 23 is adopted, after the impeller shaft 10 reaches a certain length, vibration is avoided, and the bearing device 23 bears centrifugal force, so that the centrifugal device is more reliable and stable in operation.

In order to further optimize the above solution, referring to fig. 1, 2 and 3, the blocker ring unit includes an inner fastening ring 211 and an outer fastening ring 212, the inner fastening ring 211 is sleeved on the impeller shaft 10, the outer fastening ring 212 is pressed against the inner fastening ring 211, the pressed surfaces of the outer fastening ring 212 and the inner fastening ring 211 are mutually matched inclined surfaces, and the locking unit fixes the outer fastening ring 212 on the base 111 of the motor 11. In this embodiment, the above-mentioned stop ring unit is refined and composed of an inner fastening ring 211 and an outer fastening ring, and is locked by the locking unit in an inclined plane manner, and the inclined planes of the inner fastening ring and the outer fastening ring are in matched contact, so that the radius of the inclined plane is smaller at the upper part and larger at the lower part, and the larger the expansion is, the larger the fastening force is.

As an optimized solution of the embodiment of the present invention, please refer to fig. 1, fig. 2 and fig. 3, the locking unit includes a fastening bolt 213, and the fastening bolt 213 fixes the outer fastening ring 212 on the base 111 of the motor 11. In the present embodiment, the fastening bolt 213 is used, so that the disassembly and replacement can be facilitated. Of course, other fastening methods besides using bolts are also feasible, and the embodiment is not limited to this.

As an optimized solution of the embodiment of the present invention, please refer to fig. 1, fig. 2 and fig. 3, the structure further includes a motor bracket 22 for mounting the motor 11, and the motor bracket 22 has a space for the first sealing component 20 to be disposed. In the present embodiment, the motor bracket 22 is provided to facilitate the installation and fixation of the motor 11, and to provide a space for installing the first sealing assembly 20. Preferably, the motor bracket 22 has a spigot that is concentrically mountable with the motor 11. The upper surface and the lower surface are processed by one-time clamping, and the concentricity is good. And the motor bracket 22 has rabbets on the upper and lower surfaces thereof, so that the motor 11 and the base plate can be respectively installed concentrically therewith. Preferably, the motor 11 may be one of a commercial frequency motor 11 and a variable frequency motor 11.

Referring to fig. 1, 2 and 3, an embodiment of the present invention provides a defoaming mechanism 1, including a defoaming impeller assembly 12, a defoaming chamber 13 for accommodating the defoaming impeller assembly 12, and an expandable suction path 14 capable of sucking foam into the defoaming chamber 13, where the expandable suction path 14 has a body capable of extending into a container to be defoamed, a hollow chamber is arranged in the body, and a plurality of through holes 140 for allowing foam to enter the hollow chamber are formed in the body, and the defoaming chamber 13 is communicated with the hollow chamber. In this embodiment, the expandable suction path 14 is used to prevent the foam far from the defoaming device from directly overflowing due to the size of the container. Specifically, the expandable suction path 14 can be expanded according to the shape of the container to be defoamed, and has a plurality of through holes 140, so that the foam can enter the hollow chamber of the container and then be delivered into the defoaming chamber 13 from the hollow chamber to be defoamed. The foam in the container is sucked into the expandable suction path 14 by the suction force as a whole. Preferably, the single flow passage is a porous, cylindrical or square structure, the multiple groups of single flow passages can be arranged into a frame shape, a circular shape or a linear diverging form according to the shape of the container, that is, the body is a frame-shaped structure, a columnar structure or a strip-shaped diverging structure, the strip-shaped diverging structure comprises a plurality of air suction pipes, one end of each air suction pipe is gathered together to form a gathering part, the other end of each air suction pipe is diverged outwards by taking the gathering part as a center, the through holes are formed in the air suction pipes, in a simple word, the strip-shaped diverging structure is similar to a claw shape, after the strip-shaped diverging structure is extended into the container, the plurality of claws can have the capability of sucking foam, and the air suction pipes can be arranged on a plane of an xy axis according to the circular direction and also can have a certain angle in the z axis direction. The expansion suction flow passage can uniformly distribute the suction capacity of the defoaming device to the surface or key parts of the container for generating foam according to the formation of the container.

As an optimized solution of the embodiment of the present invention, please refer to fig. 1 and fig. 2, the defoaming impeller assembly 12 includes one or more combined impellers. Preferably, the impeller is a multi-wing centrifugal impeller, a fan-shaped impeller, a plate-type welded impeller or a cast impeller. The impeller is provided with a needle-shaped structure. In this embodiment, the needle-like structure is provided on the surface of the impeller, so that the air suction capacity of the foam can be increased and a part of the foam can be eliminated by the needle-like structure. The impeller can be made of metal and alloy materials such as cast iron, carbon steel, stainless steel, titanium and titanium alloy, tantalum and tantalum alloy and the like, and can also be made of materials such as PPH, PVDF, glass fiber reinforced plastics, steel lining plastics and the like.

As an optimized scheme of the embodiment of the present invention, please refer to fig. 1 and 2, the mechanism further includes a secondary defoaming box 15, the defoaming chamber 13 is disposed in the secondary defoaming box 15, and the inner wall of the secondary defoaming box 15 is provided with a needle structure 150. In this embodiment, the fine needle structure is disposed on the inner surface of the casing, so that part of the foam that is not broken and is thrown out by the impeller can be eliminated, and the flow of the defoamed liquid can be eliminated, thereby reducing the probability of secondary foam generation.

As an optimization scheme of the embodiment of the present invention, please refer to fig. 1 and 2, the mechanism further includes a diversion box 160 for guiding the liquid after the foam is broken and dissipating energy, and the diversion box 160 is communicated with the defoaming chamber 13. In this embodiment, the diversion box 160 is a plate-welded multi-hole structure, and drains and dissipates the liquid flowing down after the foam is completely broken, and finally disperses the liquid into the container.

As an optimized solution of the embodiment of the present invention, please refer to fig. 1 and fig. 2, the mechanism further includes an exhaust port 17 for releasing gas after the foam is broken, and the exhaust port 17 is communicated with the defoaming chamber 13. In this embodiment, the exhaust port 17 is an opening provided in the mounting base 19, and can release the gas after the foam is broken, or an air suction piping system can be provided therein, and a certain negative pressure is formed in the defoaming area, so that the foam is increased, the liquid film is thinned, and the foam is more likely to break.

As an optimization scheme of the embodiment of the present invention, please refer to fig. 1 and 2, a mouth ring 18 is disposed between the suction inlet pipeline and the inner bore of the impeller. In this embodiment, the opening ring 18 is added between the suction inlet pipeline and the inner bore of the impeller, so as to increase the sealing of the suction inlet of the impeller, improve the suction force of the impeller, prevent internal circulation and increase the efficiency of the impeller.

Referring to fig. 1, fig. 2 and fig. 3, an embodiment of the present invention provides a defoaming device, including a defoaming mechanism 1 and the above-mentioned motor protection structure 2 for a defoaming device, where the first sealing component 20 is disposed near the defoaming mechanism 1. In this embodiment, the motor protection structure 2 is used in the defoaming device, so that the motor 11 of the defoaming device can be protected from being damaged. The defoaming device integrally comprises three parts, namely a motor 11, a motor protection structure 2 and a defoaming mechanism 1, wherein the motor 11 provides power, the motor protection structure 2 protects the motor 11, and the defoaming mechanism 1 works to defoam.

As an optimization scheme of the embodiment of the present invention, please refer to fig. 1, fig. 2 and fig. 3, the defoaming mechanism 1 includes a defoaming impeller assembly 12 and an impeller shaft 10 for mounting the defoaming impeller assembly 12, and the impeller shaft 10 and a motor shaft 110 of the motor 11 are coaxially disposed. Preferably, the impeller shaft 10 has a mounting hole into which the motor shaft 110 is inserted. In this embodiment, the motor shaft 110 and the impeller shaft 10 are formed by a socket structure, so that concentricity of the two is ensured. Preferably, the impeller shaft 10 is clamped once for the whole, and the whole shaft is machined once. The part successfully solves the problem of reliable connection between the motor 11 and the impeller, and has good concentricity and reliable and stable operation.

As an optimization scheme of the embodiment of the present invention, please refer to fig. 1, fig. 2 and fig. 3, the device further includes an installation base 19, the installation base 19 is disposed on the secondary defoaming box 15, and as a support seat of the motor 11, it can be one of a circular flange, a square flange and a base made of a steel frame.

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

Claims (10)

1. The utility model provides a defoaming mechanism, includes defoaming impeller group, its characterized in that: the defoaming device is characterized by further comprising a defoaming chamber for accommodating the defoaming impeller set and an expandable suction path which can suck foam into the defoaming chamber, wherein the expandable suction path is provided with a body which can extend into a container to be defoamed, a hollow chamber is arranged in the body, a plurality of through holes for enabling the foam to enter the hollow chamber are formed in the body, and the defoaming chamber is communicated with the hollow chamber.

2. The bubble removal mechanism of claim 1, wherein: the body is of a frame-shaped structure, a columnar structure or a strip-shaped diverging structure, the strip-shaped diverging structure comprises a plurality of air suction pipes, one end of each air suction pipe is gathered together to form a gathering part, the other end of each air suction pipe diverges outwards by taking the gathering part as the center, and the through holes are formed in the air suction pipes.

3. The bubble removal mechanism of claim 1, wherein: the defoaming impeller group comprises one or more combined impellers.

4. The bubble removal mechanism of claim 3, wherein: the impeller is a multi-wing centrifugal impeller, a fan-shaped impeller, a plate-type welded impeller or a cast impeller.

5. The bubble removal mechanism of claim 3, wherein: the impeller is provided with a needle-shaped structure.

6. The bubble removal mechanism of claim 1, wherein: the defoaming device further comprises a secondary defoaming box, the defoaming chamber is placed in the secondary defoaming box, and the inner wall of the secondary defoaming box is provided with a needle-shaped structure.

7. The bubble removal mechanism of claim 1, wherein: the foam-eliminating device also comprises a diversion box body used for conducting the liquid after the foam is broken and dissipating energy, and the diversion box body is communicated with the foam-eliminating chamber.

8. The bubble removal mechanism of claim 1, wherein: and the gas outlet is used for releasing gas after the foam is broken and is communicated with the defoaming chamber.

9. The bubble removal mechanism of claim 8, wherein: the exhaust port is connected with an air pumping pipeline system.

10. A defoaming device is characterized in that: comprising a motor guard structure and a de-foaming mechanism as claimed in any one of claims 1-9.

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