Physical defoaming device with spiral water tank

Abstract

The utility model relates to the technical field of defoaming, and provides a physical defoaming device with a spiral water tank, which comprises a defoaming impeller and a motor, the defoaming impeller is used for defoaming, the motor is used for driving the defoaming impeller to rotate, and an impeller connecting shaft of the defoaming impeller is coaxially connected with a motor shaft of the motor. The impeller is characterized by further comprising a sliding bearing provided with a lining and a shaft sleeve, the interior of the shaft sleeve is arranged on the impeller connecting shaft, and a spiral water groove is formed in the exterior of the shaft sleeve. According to the physical defoaming device with the spiral water tank, foam can be physically eliminated through the defoaming impeller, the spiral water tank of the sliding bearing can collect liquid to a certain extent and serve as bearing flushing liquid, meanwhile, the amount of leaked sealing liquid is reduced, and energy is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of defoaming, in particular to a physical defoaming device with a spiral water groove. Background Art

[0002] In the fields of steel, chemical industry, medicine, food, etc., due to production requirements, the chemical media used are prone to generate some foams that are not beneficial to production. If the foams are not treated in a timely and effective manner, they will cause harm to the production process and equipment, damage the production equipment, affect the product quality, and even reduce the production capacity. For example, in the field of steel strip processing, a degreasing section needs to be set to clean the surface of the strip steel containing dirt such as grease, scale powder, iron powder, and carbon powder after rolling. Due to the surfactant component in the degreasing agent, under the influence of stirring and temperature factors, the degreasing agent will wrap air to generate a large amount of foams. After the foams overflow from the container, they will cause damage to the surrounding motors and environmental pollution. After the foams flow into the strip steel cleaning tank, they will affect the strip steel cleaning effect.

[0003] Currently, most defoaming methods use chemical defoaming methods of adding defoamers to the foaming-prone medium. For example, patents ZL200820218185.3 and ZL200820012731.8 disclose defoaming methods and equipment for adding defoamers. However, the defoamers used in this chemical defoaming method generally have an inhibitory effect on the active components in the foaming-prone medium, and even some will produce precipitates to block the system pipelines and equipment. The defoamer is continuously added according to the condition of the foaming-prone medium, consuming a large amount of production costs. Moreover, the defoamer itself generally contains difficult-to-degrade organic substances such as silicone or polyether, increasing the difficulty and cost of water treatment. If ordinary mechanical defoaming methods are used, for the container storing the foaming-prone medium, due to the change of the pressure inside the container caused by the foaming-prone medium itself and the obvious upward air flow formed after the foam breaks, both will entrain the unbroken foam flow to cross over the impeller. Therefore, the foam will damage the motor and other mechanisms of the mechanical defoaming device, and even directly overflow outside the container to cause harm. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a physical defoaming device with a spiral water groove, which can at least solve some defects in the prior art.

[0005] To achieve the above purpose, the embodiment of the utility model provides the following technical scheme: A physical defoaming device with a spiral water groove, comprising a defoaming impeller for eliminating foams and a motor for driving the defoaming impeller to rotate. The impeller connecting shaft of the defoaming impeller is coaxially connected with the motor shaft of the motor. Its characteristic lies in that: it also includes a sliding bearing with a bushing and a shaft sleeve. The inside of the shaft sleeve is arranged on the impeller connecting shaft, and a spiral water groove is arranged outside the shaft sleeve.

[0006] Further, it further includes a bracket for supporting the motor and a mounting base for supporting the bracket, and the sliding bearing is located on a side of the mounting base away from the bracket.

[0007] Further, a liquid blocking assembly for blocking liquid from entering the motor is further provided in the bracket.

[0008] Further, the liquid blocking assembly includes a mechanical seal structure provided on the impeller connecting shaft, and at least a part of the mechanical seal structure is placed in the bracket.

[0009] Further, the liquid blocking assembly further includes a shaft sleeve expansion sleeve provided on the impeller connecting shaft, and the shaft sleeve expansion sleeve is arranged close to the motor.

[0010] Further, a housing is further provided below the mounting base, and the defoaming impeller is located in the housing.

[0011] Further, the bottom of the housing has a suction section.

[0012] Further, a diversion box body is provided between the suction section and the housing.

[0013] Further, a mouth ring is provided on the suction section.

[0014] Further, the shaft sleeve is threadedly connected to the impeller connecting shaft.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: A physical defoaming device with a spiral water groove can physically eliminate foam through the defoaming impeller. The spiral water groove of the adopted sliding bearing can collect liquid to a certain extent and act as a bearing flushing liquid, while reducing the amount of liquid leaking from the sealed liquid, thus saving energy. Description of the Drawings

[0016] Figure 1 It is a schematic cross-sectional view of a physical defoaming device with a spiral water groove provided by an embodiment of the present utility model from a front view perspective;

[0017] Figure 2 It is a schematic view of a physical defoaming device with a spiral water groove provided by an embodiment of the present utility model from a top view perspective;

[0018] In the reference numerals: 1 - motor, 2 - bracket, 3 - shaft sleeve expansion sleeve, 4 - impeller connecting shaft, 5 - mechanical seal structure, 6 - sliding bearing, 7 - mounting base, 8 - defoaming impeller, 9 - housing, 10 - mouth ring, 11 - diversion box body, 12 - suction section, 13 - impeller nut. Detailed Embodiments

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figure 1 and Figure 2 , the embodiment of the present utility model provides a physical defoaming device with a spiral water groove, which includes a defoaming impeller 8 for eliminating foam and a motor 1 for driving the defoaming impeller 8 to rotate. The impeller connecting shaft 4 of the defoaming impeller 8 is coaxially connected with the motor shaft of the motor 1. It also includes a sliding bearing 6 with a bushing and a shaft sleeve. The inside of the shaft sleeve is arranged on the impeller connecting shaft 4, and a spiral water groove is opened outside the shaft sleeve. In this embodiment, the defoaming impeller 8 can physically eliminate foam, and the spiral water groove of the adopted sliding bearing 6 can collect liquid to a certain extent and act as a bearing flushing liquid, while reducing the amount of liquid leaked from the sealed liquid, saving energy. Specifically, the motor 1 can be one of a power frequency motor 1, a variable frequency motor 1, one of explosion-proof and non-explosion-proof, and one of high-efficiency and ordinary types. The entire impeller connecting shaft 4 is clamped once, and the whole shaft is machined by turning once. The impeller connecting shaft 4 solves the reliable connection between the motor 1 and the defoaming impeller 8, has good concentricity, and the device runs reliably and smoothly. The length of the impeller connecting shaft 4 can also be customized according to the on-site environment. The defoaming impeller 8 can be a single or a combination of impellers. The impeller can be an axial flow type impeller or a fan type impeller. In addition, the impeller can be a plate-welded impeller or a cast impeller, and this embodiment does not limit this. Preferably, the sliding bearing 6 is composed of a box body, a wear-resistant bushing, and a shaft sleeve, and realizes the functions of shock absorption and support through the sliding friction between the bushing and the shaft sleeve, and balances the radial force generated during operation. The inside of the shaft sleeve is connected to the impeller connecting shaft 4 through threads, making the connection more firm and reliable. A spiral water groove is opened outside, which can collect the liquid leaked from the mechanical seal to a certain extent and act as a bearing flushing liquid, while reducing the amount of liquid leaked from the mechanical seal.

[0021] Please refer to Figure 1 and Figure 2 , the device also includes a bracket 2 for supporting the motor 1 and a mounting base 7 for supporting the bracket 2. The sliding bearing 6 is located on the side of the mounting base 7 away from the bracket 2. In this embodiment, the upper and lower surfaces of the bracket 2 are machined by clamping once, with good concentricity. There are rabbets on both the upper and lower surfaces to concentrically install the motor 1 and the bottom plate. This part provides space for adding a liquid blocking component.

[0022] Please refer to Figure 1 andFigure 2 Inside the bracket 2, there is also a liquid-blocking component for preventing liquid from entering the motor 1. The liquid-blocking component includes a mechanical seal structure 5 provided on the impeller connecting shaft 4, and at least a part of the mechanical seal structure 5 is placed inside the bracket 2. The liquid-blocking component further includes a shaft expansion sleeve 3 provided on the impeller connecting shaft 4, and the shaft expansion sleeve 3 is arranged close to the motor 1. In this embodiment, the mechanical seal can adopt a cartridge seal, which reduces the installation difficulty. The O-ring is used to block the rising liquid in the seal cavity, and the seal is formed by the high-speed rotational friction of the sealing surface to prevent the liquid leakage from polluting the environment. The shaft expansion sleeve 3 is fastened by bolts so that the inclined surface is fastened to the large surface, and finally the impeller connecting shaft 4 firmly fastens the motor 1 shaft. This part helps to solve the serious accident that even if the mechanical seal leaks, it will also prevent the process medium and foam from leaking into the motor 1, resulting in the burnout of the motor 1.

[0023] Please refer to Figure 1 and Figure 2 This device further includes a housing 9 provided below the mounting base 7, and the defoaming impeller 8 is located in the housing 9. In this embodiment, the housing 9 is in a cylindrical shape or a rectangular shape. Preferably, the bottom of the housing 9 has a suction section 12. A flow guiding box body 11 is provided between the suction section 12 and the housing 9. The suction section 12 is a bell mouth welded to the lower part of the suction pipe, and a cross rib is welded at the bottom to prevent it from deforming, which improves the suction efficiency. The flow guiding box body 11 is a plate welded with multiple threaded structures. A circle of small columns is welded on the upper surface of the suction section 12, and the small columns are threadedly connected to the housing 9. Preferably, a seal ring 10 is provided on the suction section 12. A seal ring 10 is added between the suction pipe and the inner hole cavity of the impeller to prevent wear, increase the seal of the impeller suction port, improve the suction force of the impeller, prevent internal circulation, and increase the efficiency of the impeller.

[0024] Please refer to Figure 1 and Figure 2 This device further includes an impeller nut 13, which fastens the defoaming impeller 8 on the impeller connecting shaft 4 to ensure its stable and reliable operation and avoid the problem of part detachment during installation and operation.

[0025] The working principle of this device is as follows:

[0026] The defoaming device installation base 7 is installed on the top of the container according to the size matching the container, and the motor 1 is firmly connected to the installation base 7 by means of the motor bracket 2. The motor 1 drives the defoaming impeller 8 to rotate through the impeller connecting shaft 4, the connecting shaft expansion sleeve 3, the mechanical seal 5, and the sliding bearing 6. After the defoaming impeller 8 rotates, a suction force is formed, and the foam generated on the surface of the container is sucked into the inlet of the defoaming impeller 8 through the suction section 12 arranged along the shape of the container. The defoaming impeller 8 uses the shear force and compression effect generated by the impeller to break the bubbles, separating the gas and liquid. The liquid is thrown towards the housing 9 by inertia force. The liquid generated after defoaming flows into the diversion box body 11 along the housing 9. While further dissipating the energy of the fluid after defoaming, the diversion box body 11 disperses it into the container, avoiding conflict with the foam flow, and at the same time guiding the liquid to flow downward, completely isolating the foam flow and liquid flow in the container from the motor 1. The foam flow or liquid flow caused by the positive pressure or negative pressure formed by the easily foaming medium in the container will not damage the motor 1. Even if the mechanical seal 5 is damaged, the foam flow or liquid flow will be intercepted by the connecting shaft expansion sleeve 3 and will not damage the motor 1. The shaft sleeve of the sliding bearing 6 is reliably connected to the impeller connecting shaft 4 through threads. The external spiral groove can collect the liquid leaking from the mechanical seal to a certain extent and act as a bearing flushing fluid, while reducing the amount of liquid leaking from the mechanical seal and saving energy. A collar 10 is added between the suction port pipe and the inner hole cavity of the impeller, increasing the seal of the impeller suction port, reducing wear, improving the suction force of the impeller, preventing internal circulation, and increasing the efficiency of the impeller.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A physical defoaming device with a spiral water tank, comprising a defoaming impeller for eliminating foam and a motor for driving the defoaming impeller to rotate. The impeller connecting shaft of the defoaming impeller is coaxially connected to the motor shaft of the motor, and is characterized in that: It further includes a sliding bearing having a bushing and a sleeve, the interior of the sleeve is provided on the impeller connecting shaft, and a spiral water groove is provided on the exterior of the sleeve.

2. The physical defoaming device with a spiral water groove according to claim 1, characterized in that: It further includes a bracket for supporting the motor and a mounting base for supporting the bracket, and the sliding bearing is located on the side of the mounting base away from the bracket.

3. The physical defoaming device with a spiral water groove according to claim 2, characterized in that: A liquid blocking assembly for preventing liquid from entering the motor is further provided in the bracket.

4. The physical defoaming device with a spiral water groove according to claim 3, characterized in that: The liquid blocking assembly includes a mechanical seal structure provided on the impeller connecting shaft, and at least a part of the mechanical seal structure is disposed within the bracket.

5. The physical defoaming device with a spiral water groove according to claim 3, characterized in that: The liquid blocking assembly further includes a shaft expansion sleeve provided on the impeller connecting shaft, and the shaft expansion sleeve is disposed close to the motor.

6. The physical defoaming device with a spiral water groove according to claim 2, characterized in that: It further includes a housing provided below the mounting base, and the defoaming impeller is located within the housing.

7. The physical defoaming device with a spiral water tank according to claim 6, characterized in that: The bottom of the housing has a suction section.

8. The physical defoaming device with a spiral water tank according to claim 7, characterized in that: A flow guiding box body is provided between the suction section and the housing.

9. The physical defoaming device with a spiral water groove according to claim 7, characterized in that: A mouth ring is provided on the suction section.

10. The physical defoaming device with a spiral water groove as described in claim 1, characterized in that: The sleeve is threadedly connected to the impeller connecting shaft.

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