Protective structure and submersible mixer

Abstract

The utility model relates to the technical field of sewage treatment equipment, and discloses a protective structure and a submersible mixer, the protective structure comprises a shell and a detachable end plate; the sealing assembly comprises a flange and a gasket, the flange is fixedly connected with the shell, the end plate is locked with the flange through a bolt, the gasket is located between the end plate and the flange, and a spring is arranged between the bolt and the flange; according to the air inlet pipe, by means of the spring arranged on the bolt in a sleeving mode, the end plate tightly abuts against the flange through thrust of the tension spring on the screw rod, the gasket is clamped through the end plate to achieve sealing, the radial thrust applied to the end plate by the spring can automatically make up a gap generated by deformation of the gasket, the sealing effect is more stable, and the sealing performance is improved; and compressed air is fed into the shell through the air inlet pipe, so that a sealed cavity formed by the shell and the end plate is in a positive pressure state, the probability that external slurry enters the cavity of the shell is reduced, and the protection performance of the motor is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment equipment, in particular to a protective structure and a submersible agitator. Background Art

[0002] In the water treatment process, homogenization and flow pushing are required, and submersible mixers are essential equipment.

[0003] Publication number CN103962047B discloses an existing technology of a direct-drive submersible mixer in the field of mixer technology, including: a distribution board, a casing, a stator with coil windings wound on each salient pole, a rotor, a front cover, a support baffle, an impeller, a main shaft, a right sealing static ring, a left sealing static ring and a sealing dynamic ring. The front end opening of the casing is provided with a support baffle and a front cover in sequence, the rear end is closed and the distribution board is welded to the outside, one end of the main shaft is arranged on the inner side of the rear end of the casing, the middle part is positioned on the support baffle, the other end passes through the front cover and is connected to the impeller, the stator is fixed to the inner wall of the casing, the rotor is located inside the casing and is arranged on the main shaft, a left sealing static ring is provided in the gap between the support baffle and the main shaft, a right sealing static ring is provided in the gap between the front cover and the main shaft, and a sealing dynamic ring is provided between the left sealing static ring and the right sealing static ring, so that a sealed oil chamber space is formed between the opposing surfaces of the support baffle and the front cover.

[0004] In the existing technology, the motor is sealed and protected by cooperating with the end plate and the casing, and a sealing ring is set between the end plate and the casing, and the end plate is locked by bolts. However, the sealing ring will deform due to the influence of ambient temperature, and it is difficult to automatically make up for the gap caused by the deformation. Secondly, the sealing is completely dependent on the sealing ring. Since the motor is located in the casing, the sealing of the rotating shaft and the wiring position needs to be considered. Multiple seals will also increase the risk of leakage. There is a certain room for optimization in the sealing protection of the motor.

[0005] To this end, we propose a protective structure and a submersible mixer. Utility Model Content

[0006] The utility model mainly solves the technical problem that the sealing ring is difficult to automatically make up the gap, resulting in poor sealing effect, and provides a protective structure and a submersible mixer.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions, a protective structure, including:

[0008] The shell and the detachable end plates form a sealed chamber together with the shell and the end plates;

[0009] A sealing assembly is provided between the housing and the end plate for sealing the gap. The sealing assembly includes a flange and a gasket. The flange is fixedly connected to the housing. The end plate is locked with the flange by bolts. The gasket is located between the end plate and the flange. A spring is provided between the bolt and the flange. The spring can push the screw so that the end plate contacts the gasket to form a seal.

[0010] The air inlet pipe is fixedly mounted on the wall of the shell and communicates with the chamber of the shell. The air inlet pipe is connected to an air source.

[0011] As a preferred embodiment of the present invention, the shell forms a cylindrical structure with one end open, and the end plate is a circular plate. The end plate is adapted to the shell and is located at the port of the shell. An axial hole is provided at the end of the end plate, and a sealing ring is provided in the axial hole.

[0012] As a preferred embodiment of the present invention, the rib forms an annular plate structure, the rib is fixedly arranged on the outer wall of the shell, the circumferential surface of the rib is provided with a number of integrally formed protrusions, the protrusions are penetrated with mounting holes, the circumferential surface of the end plate is fixed with a number of ear plates, the ear plates are distributed in a one-to-one correspondence with the protrusions, the wall surface of the ear plate is provided with the same mounting holes, the bolts pass through the ear plates and the protrusions and are locked by nuts.

[0013] As a preferred embodiment of the present invention, a hole adapted for the air intake pipe is provided on the circumferential surface of the shell, and the air intake pipe extends through the hole into the cavity of the shell.

[0014] As a preferred embodiment of the present invention, a plurality of fins are fixedly mounted on the outer wall of the shell, and the plurality of fins form a heat exchange surface on the outer wall of the shell.

[0015] As a preferred embodiment of the present invention, the fins form a plate-like structure with a rectangular cross-section, the fins are equal in length to the shell, and the fins are distributed obliquely.

[0016] A submersible mixer comprises a motor and blades, wherein the blades are fixedly mounted on the output shaft of the motor, the exterior of the motor is provided with all of the above-mentioned protective structures, the motor is fixedly mounted on the inner bottom surface of the shell by bolts, and the motor output shaft passes through the end plate and is rotatably connected to the end plate.

[0017] The utility model provides a protective structure and a submersible agitator, which have the following beneficial effects:

[0018] 1. This protective structure and submersible mixer are used to lock and fix the protrusions of the end plate, ear plate and rib one by one by bolts. With the help of the spring sleeved on the bolt, the tension spring applies thrust to the screw so that the end plate is tightly against the rib, and the end plate clamps the gasket to achieve sealing. Secondly, the spring applies radial thrust to the end plate, which can automatically make up for the gap caused by the deformation of the gasket, making the sealing effect more stable and improving the sealing performance. With the help of the air intake pipe, the air source takes the compressor as an example, of course it can also be equipment such as a fan. Compressed gas is sent into the shell through the air intake pipe, so that the sealed chamber formed by the shell and the end plate is in a positive pressure state, reducing the probability of external mud entering the shell cavity, and further improving the protection performance of the motor.

[0019] 2. This protective structure and submersible agitator are provided with one-piece fins. First, the fins can increase the contact surface area between the shell and the mud, improve the heat conduction effect, and thus control the temperature around the motor. Secondly, for thicker mud, the fins can provide a certain limiting effect for the shell, reducing the probability of the shell shifting when the blades stir the mud. Of course, the shell can also be fixed with the help of a bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is one of the overall three-dimensional diagrams of the utility model;

[0021] Figure 2 This is the second overall stereogram of the utility model;

[0022] Figure 3 This is a three-dimensional diagram of the housing of the utility model;

[0023] Figure 4 This is a three-dimensional diagram of the rib and end plate of the utility model;

[0024] Figure 5 This is a three-dimensional diagram of the motor and blades installed in the shell of the utility model.

[0025] Legend: 10, shell; 11, end plate; 12, rib; 13, gasket; 14, intake pipe; 15, fin. DETAILED DESCRIPTION

[0026] A protective structure and a submersible mixer, such as Figure 1 and Figure 2 As shown, including:

[0027] The shell 10 and the detachable end plate 11, the shell 10 and the end plate 11 together build a sealed chamber, the shell 10 forms a cylindrical structure with an open end, the end plate 11 is a circular plate, the end plate 11 is adapted to the shell 10, the end plate 11 is located at the port of the shell 10, the end of the end plate 11 is provided with an axial hole, a sealing ring is provided in the axial hole, the output shaft of the motor passes through the sealing ring and extends to the outside of the shell 10, and the motor drives the blades to rotate to achieve the purpose of stirring. Secondly, the end of the shell 10 needs to be provided with a wiring hole for wiring, which is not shown in the figure. The purpose of sealing is achieved by filling the wiring hole with waterproof glue, and the shell 10 and the end plate 11 together build a sealed chamber to wrap the motor, so that the motor is in a closed environment, reducing the interference of mud and water on the electronic components of the motor, and achieving the purpose of protection. The types and specifications of the motor are not restricted too much here. The motor needs to be connected to the power supply and control switch;

[0028] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a sealing assembly is arranged between the shell 10 and the end plate 11 for sealing the gap, and the sealing assembly includes a rib 12 and a gasket 13. The rib 12 is fixedly connected to the shell 10, and the end plate 11 is locked with the rib 12 by bolts. The gasket 13 is located between the end plate 11 and the rib 12, and a spring is provided between the bolt and the rib 12. The spring can push the screw so that the end plate 11 contacts the gasket 13 to form a seal; the air intake pipe 14 is fixedly mounted on the wall of the shell 10 and communicates with the chamber of the shell 10. The air intake pipe 14 is connected to an air source. The rib 12 forms an annular plate structure. The rib 12 is fixedly arranged on the outer wall of the shell 10. The circumferential surface of the rib 12 is provided with a number of integrally formed protrusions, and the protrusions are penetrated to open mounting holes. The circumferential surface of the end plate 11 is fixedly provided with a number of ear plates, and the ear plates are distributed one-to-one with the protrusions. The wall surface of the ear plate is provided with the same mounting holes, and the bolts pass through the ear plate and the protrusion and pass through The nut is locked, and a hole is opened on the circumferential surface of the shell 10 to adapt to the air intake pipe 14. The air intake pipe 14 extends into the cavity of the shell 10 through the hole. In this scheme, the end plate 11, the ear plate and the protrusions of the rib 12 are locked and fixed one by one by bolts. With the help of the spring sleeved on the bolt, the thrust of the screw given by the tension spring makes the end plate 11 tightly contact the rib 12, and the end plate 11 clamps the gasket 13 to achieve sealing. Secondly, the spring applies radial thrust to the end plate 11, which can automatically make up for the gap caused by the deformation of the gasket 13, making the sealing effect more stable and improving the sealing performance. With the help of the air intake pipe 14, the air source takes the compressor as an example, of course it can also be equipment such as a fan. Compressed gas is sent into the shell 10 through the air intake pipe 14, so that the sealed chamber formed by the shell 10 and the end plate 11 is in a positive pressure state, reducing the probability of external mud entering the cavity of the shell 10, and further improving the protection performance of the motor.

[0029] like Figure 2 and Figure 3As shown, a plurality of fins 15 are fixedly mounted on the outer wall of the shell 10, and the plurality of fins 15 form a heat exchange surface on the outer wall of the shell 10. The fins 15 form a plate-like structure with a rectangular cross-section. The fins 15 are the same length as the shell 10, and the fins 15 are distributed obliquely. As a supplement to the above scheme, by providing one-piece fins 15, firstly, the fins 15 can increase the contact surface area between the shell 10 and the mud, improve the heat conduction effect, and thus control the temperature around the motor. Secondly, for thicker mud, the fins 15 can provide a certain limiting effect for the shell 10, thereby reducing the probability of the shell 10 shifting when the blades stir the mud. Of course, the shell 10 can also be fixed with the aid of a bracket.

[0030] like Figure 5 As shown, a submersible mixer includes a motor and blades, which are fixedly mounted on the output shaft of the motor. The outside of the motor is provided with all the above-mentioned protective structures. The motor is fixedly mounted on the inner bottom surface of the shell 10 by bolts. The motor output shaft passes through the end plate 11 and is rotatably connected to the end plate 11. By providing the above-mentioned protective structure, the motor is placed in a relatively sealed positive pressure environment, reducing the interference of mud on the motor electronic components, ensuring the normal operation of the motor, and extending its service life.

[0031] The working principle of the utility model is as follows: the motor is fixedly installed inside the housing 10, and a wiring hole for wiring is opened at the end of the housing 10. The power line of the motor passes through the wiring hole and is connected to the power supply. By filling the wiring hole with waterproof glue, the motor output shaft passes through the end plate 11, and the blade is fixedly installed with the motor output shaft;

[0032] The end plate 11, the ear plate and the protrusions of the rib 12 are locked and fixed one by one by bolts. With the help of the spring sleeved on the bolt, the tension spring applies thrust to the screw so that the end plate 11 is tightly against the rib 12, and the end plate 11 clamps the gasket 13 to achieve sealing. Secondly, the spring applies radial thrust to the end plate 11, which can automatically make up for the gap caused by the deformation of the gasket 13. Compressed gas is sent into the shell 10 through the air inlet pipe 14, so that the sealed chamber formed by the shell 10 and the end plate 11 is in a positive pressure state, thereby protecting the motor.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A protective structure, characterized in that: include: A shell (10) and a detachable end plate (11), wherein the shell (10) and the end plate (11) together form a sealed chamber; A sealing assembly is provided between a housing (10) and an end plate (11) for sealing a gap, the sealing assembly comprising a rib (12) and a gasket (13), the rib (12) being fixedly connected to the housing (10), the end plate (11) being locked with the rib (12) by means of bolts, the gasket (13) being located between the end plate (11) and the rib (12), a spring being provided between the bolt and the rib (12), the spring being capable of pushing a screw so that the end plate (11) contacts the gasket (13) to form a seal; An air inlet pipe (14) is fixedly mounted on the wall of the shell (10) and communicates with the chamber of the shell (10). The air inlet pipe (14) is connected to an air source.

2. The protective structure according to claim 1, characterized in that: The shell (10) forms a cylindrical structure with one end open. The end plate (11) is a circular plate. The end plate (11) is adapted to the shell (10). The end plate (11) is located at the end of the shell (10). An axial hole is provided at the end of the end plate (11), and a sealing ring is provided in the axial hole.

3. The protective structure according to claim 1, characterized in that: The retaining edge (12) forms an annular plate structure. The retaining edge (12) is fixedly arranged on the outer wall of the shell (10). The circumferential surface of the retaining edge (12) is provided with a plurality of integrally formed protrusions, and the protrusions are penetrated by mounting holes. The circumferential surface of the end plate (11) is fixedly provided with a plurality of ear plates, and the ear plates are distributed in a one-to-one correspondence with the protrusions. The wall surface of the ear plate is provided with the same mounting holes. Bolts pass through the ear plates and the protrusions and are locked by nuts.

4. The protective structure according to claim 1, characterized in that: A hole adapted for the air intake pipe (14) is provided on the circumferential surface of the shell (10), and the air intake pipe (14) extends through the hole into the cavity of the shell (10).

5. The protective structure according to claim 1, characterized in that: A plurality of fins (15) are fixedly mounted on the outer wall of the shell (10), and the plurality of fins (15) form a heat exchange surface on the outer wall of the shell (10).

6. The protective structure according to claim 5, characterized in that: The fins (15) form a plate-like structure with a rectangular cross-section. The fins (15) are of the same length as the housing (10), and the fins (15) are distributed obliquely.

7. A submersible agitator comprising a motor and blades, wherein the blades are fixedly mounted on an output shaft of the motor, characterized in that: The exterior of the motor is provided with a protective structure according to any one of claims 1 to 6. The motor is fixedly mounted on the inner bottom surface of the housing (10) by bolts, and the motor output shaft passes through the end plate (11) and is rotatably connected to the end plate (11).

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