End cover and controller assembly for permanent magnet frequency conversion aerator

Abstract

The utility model discloses an end cover and controller assembly for a permanent magnet frequency conversion aerator. The end cover comprises an upper end cover and a lower end cover; the upper end cover is of a cap body structure with a downward opening and is arranged on the upper portion of the lower end cover in a sleeving mode. An O-shaped sealing ring is arranged between the lower end cover and the upper end cover; a flange plate is arranged on the outer wall of the lower end cover and located below the O-shaped sealing ring, and correspondingly, an annular brim is arranged on the outer side of the lower end of the upper end cover. The annular brim is fixedly connected with the flange plate through threads; an annular protruding edge is arranged on the upper portion of the inner wall of the upper end cover, and a containing cavity is formed between the annular protruding edge and a top plate of the upper end cover. A heat dissipation plate used for installing a controller is arranged in the containing cavity. The heat dissipation plate is tightly pressed on the top plate of the upper end cover through the annular check ring; a first boss is arranged on the side part of the upper end cover; a wire outlet hole is formed in the first boss, and a wire outlet seat for mounting a cable is arranged at the wire outlet hole; and a shaft hole for mounting a motor rotating shaft is formed in the middle of the lower end cover.

Description

Technical Field

[0001] The utility model relates to the technical field of aerators, in particular to an end cover and a controller assembly for a permanent magnet variable frequency aerator. Background Art

[0002] As an important equipment in aquaculture, the aerator is mainly used to increase the dissolved oxygen content of the aquaculture water to prevent the aquaculture water from being hypoxic. It can also inhibit the growth of anaerobic bacteria in the water to prevent the aquaculture water from deteriorating and threatening the living environment of fish and shrimp. During operation, the aerator will stir the water to produce a large amount of water splashes, which can fall on the end cover to cool it. Since the controller of the aerator cannot be exposed to water, the end cover where the controller is installed requires higher waterproofness, heat dissipation and reliability.

[0003] In the prior art, the controller assembly of the permanent magnet variable frequency aerator usually includes an end cover, a junction box and a flange; the controller is installed on the end cover. In order to prevent water from entering the controller, sealant or flat sealing gasket is currently used to achieve the sealing between the end cover and the flange and the end cover and the junction box. However, this assembly method has poor reliability, and water is prone to enter the connection seal after long-term use, thereby reducing the reliability of the permanent magnet variable frequency aerator. Moreover, when assembling the controller, it is necessary to first drill threaded holes on the end cover, and then use screws to fix the controller on the end cover, which requires adding a boss to the end cover, increasing the complexity of casting or die-casting the end cover. In addition, the water in the aquaculture pond is highly corrosive, especially seawater aquaculture, which is highly corrosive to the end cover installed with the controller. The end cover in the prior art is usually made of aluminum alloy. Although it can be surface treated, it can only slightly delay the time of corrosion, and fails to fundamentally solve the corrosion resistance problem of the end cover. Utility Model Content

[0004] In order to overcome the above-mentioned problems existing in the prior art, the present application provides an end cover for a permanent magnet variable frequency aerator. The end cover for a permanent magnet variable frequency aerator of the present application includes an upper end cover and a lower end cover, and an O-ring is arranged between the upper end cover and the lower end cover, which utilizes the compression deformation of the O-ring to produce a sealed contact with the sealing surface, thereby preventing external liquid from entering the interior of the end cover, and has high reliability; in addition, a heat sink is fixed inside the upper end cover by an annular retaining ring, which can play a role in heat dissipation on the one hand, and can be used to fix the controller on the other hand to ensure the connection firmness of the controller, and the assembly is simple and easy to implement. Correspondingly, the present application also provides a controller assembly for a permanent magnet variable frequency aerator using the end cover, which has good sealing and heat dissipation performance and high reliability in use.

[0005] For the end cap, the technical solution of this application is:

[0006] The end cover of the permanent magnet variable frequency aerator comprises an upper end cover and a lower end cover; the upper end cover is a cap body structure with an opening facing downward, and is sleeved on the upper part of the lower end cover; an O-ring is provided between the lower end cover and the upper end cover; a flange is provided on the outer wall of the lower end cover, located below the O-ring, and correspondingly, an annular cap brim is provided on the outer side of the lower end of the upper end cover; the annular cap brim and the flange are fixed by threaded connection; an annular convex edge is provided on the upper part of the inner wall of the upper end cover; an accommodating cavity is formed between the annular convex edge and the top plate of the upper end cover; a heat sink for installing a controller is provided in the accommodating cavity; the heat sink is fixed to the top plate of the upper end cover by pressing and fixing it through an annular retaining ring; a first boss is provided on the side of the upper end cover; a wire outlet hole is provided on the first boss, and a wire outlet seat for installing a cable is provided at the wire outlet hole; an axial hole for installing a motor shaft is provided in the middle part of the lower end cover.

[0007] Compared with the prior art, the end cover for the permanent magnet variable frequency aerator of the present application includes an upper end cover and a lower end cover, and an O-ring is arranged between the upper end cover and the lower end cover, which utilizes the compression deformation of the O-ring to generate a sealed contact with the sealing surface (when the O-ring is compressed between the upper end cover and the lower end cover, it will be deformed and exert pressure on the sealing surface), thereby preventing the external liquid from entering the end cover, and the reliability is high; moreover, the interior of the upper end cover is pressed and fixed with a heat sink by an annular retaining ring, which can be used to fix the controller on the one hand to ensure the firmness of the connection of the controller, and the assembly is simple and easy to implement (during assembly, the controller is first fixed on the heat sink, and then the heat sink is pressed and fixed on the top plate of the upper end cover with an annular retaining ring, and the manufacturing process is very simple), and on the other hand, it can also play a heat dissipation role, transferring the heat generated by the controller when in use to the outside world; in addition, the upper end cover adopts a cap structure with an opening facing downward, which increases its contact area with external water and further improves the heat dissipation; and a wire outlet seat is also provided on the upper end cover, which makes cable assembly more convenient.

[0008] As an optimization, in the aforementioned end cap for permanent magnet variable frequency aerator, an annular edge guard is provided at the bottom of the outer edge of the annular brim; the annular edge guard is sleeved outside the flange, thereby further improving the sealing performance of the end cap.

[0009] As an optimization, in the aforementioned permanent magnet variable frequency aerator end cover, an annular groove is provided on the outer wall of the lower end cover, and the O-type sealing ring is located in the annular groove, thereby playing a role in limiting and positioning the O-type sealing ring.

[0010] As an optimization, in the aforementioned permanent magnet variable frequency aerator end cover, a second boss is provided on the side of the upper end cover, opposite to the position of the first boss; an air pressure test hole is provided on the second boss, and a screw plug is provided at the air pressure test hole. When the end cover of the present application is used, the lower end cover is assembled on the motor of the aerator, and the rotating shaft of the motor is inserted into the shaft hole. After the end cover is installed, the screw plug can be removed and an air pressure test can be performed to ensure the performance of the aerator. Furthermore, the air pressure test hole is a threaded hole, the screw plug is connected to the air pressure test hole by threads, and a gasket is provided between the head of the screw plug and the second boss.

[0011] As an optimization, in the aforementioned permanent magnet variable frequency aerator end cap, a limiting step is provided on the outer peripheral surface of the outlet seat; the limiting step is welded and fixed to the outer side surface of the first boss. The outlet seat and the upper end cap are fixed by welding, the connection is strong, and the structural rigidity is large and the integrity is good. Furthermore, the outlet seat is made of stainless steel.

[0012] As an optimization, in the aforementioned permanent magnet variable frequency aerator end cover, the upper end cover is formed in one piece with stainless steel. Stainless steel has the advantages of heat resistance and low temperature resistance, and has good corrosion resistance, and can be used in harsh environments, making the upper end cover more suitable for the use conditions of the aerator; in addition, the upper end cover is formed in one piece, which is easy to manufacture and convenient for mass production. Furthermore, the heat sink is an aluminum plate. Aluminum plates have the advantages of good heat dissipation performance, low cost, and easy processing. Using aluminum plates to make heat sinks is conducive to cost control.

[0013] For the controller assembly, the technical solution of this application is:

[0014] A controller assembly for a permanent magnet variable frequency aerator comprises an end cover, a controller and a cable; the end cover is the aforementioned end cover for the permanent magnet variable frequency aerator of the present application; the controller is fixed on a heat sink; the cable is installed on a wire outlet seat and is locked and fixed by a wire outlet nut.

[0015] Compared with the prior art, in the controller assembly for the permanent magnet variable frequency aerator of the present application, the controller is fixed on the heat sink, and the heat sink is fixed to the top plate of the upper end cover by a ring-shaped retaining ring. The assembly is simple and the connection is firm. During the use of the aerator, the heat sink is not easy to loosen, thereby ensuring a good heat dissipation effect. In addition, the end cover includes an upper end cover and a lower end cover, and an O-ring is arranged between the upper end cover and the lower end cover, which utilizes the compression deformation of the O-ring to generate a sealing contact with the sealing surface. The cable is installed on the outlet seat and is locked and fixed by the outlet nut, thereby ensuring the sealing performance of the end cover, making it difficult for external water to enter the interior of the end cover, thereby improving the reliability of the aerator.

[0016] As an optimization, in the aforementioned permanent magnet variable frequency aerator controller assembly, a limiting step is provided on the outer peripheral surface of the outlet seat; the limiting step is welded and fixed to the outer side surface of the first boss. At this time, the connection is highly firm and has good integrity. An inclined surface is machined and formed on the inner wall of the outlet seat, and the inclined surface fits the inner side surface of the limiting head on the cable; the outer side surface of the limiting head abuts against the end of the outlet nut. By rotating the outlet nut, the inclined surface can be pressed against the inner side surface of the limiting head, thereby increasing the sealing between the cable and the outlet seat, making it difficult for water to enter the end cover from the connection gap between the two.

[0017] Furthermore, a washer is provided between the limit head and the outlet nut. The provision of the washer avoids direct contact between the outlet nut and the limit head, so that the surface of the limit head will not be scratched when the outlet nut is tightened, thereby increasing its service life, and can also disperse the pressure caused by the outlet nut on the limit head to prevent the limit head from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the end cover for the permanent magnet variable frequency aerator of the present application;

[0019] Figure 2 yes Figure 1 A top view of the end cover for the permanent magnet variable frequency aerator;

[0020] Figure 3 yes Figure 2 AA section view in the figure;

[0021] Figure 4 It is a schematic diagram of the structure of the upper end cover in this application;

[0022] Figure 5 yes Figure 4 BB section view in the figure;

[0023] Figure 6 It is a structural schematic diagram of the lower end cover in this application;

[0024] Figure 7 It is a structural schematic diagram of a controller assembly for a permanent magnet variable frequency aerator in the present application;

[0025] Figure 8 yes Figure 7 A cross-sectional view of a controller assembly for a permanent magnet variable frequency aerator;

[0026] Fig. 9 yes Figure 8 An enlarged schematic diagram of part C in FIG.

[0027] The markings in the accompanying drawings are: 1-upper end cover, 101-annular cap brim, 102-annular convex brim, 103-first boss, 104-second boss, 105-annular edge guard, 106-A mounting hole; 2-lower end cover, 201-flange, 202-axial hole, 203-annular groove, 204-annular limiting boss, 205-B mounting hole; 3-O-ring; 4-controller; 5-heat sink; 6-annular retaining ring; 7-cable, 701-limiting head; 8-outlet seat, 801-limiting step, 802-inclined surface; 9-screw plug; 10-outlet nut; 11-washer; 12-bolt. DETAILED DESCRIPTION

[0028] The present application is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present application.

[0029] See also Figures 1 to 3 The end cover of the permanent magnet variable frequency aerator of the present application comprises an upper end cover 1 and a lower end cover 2; the upper end cover 1 is a cap structure with an opening facing downward, and is sleeved on the upper part of the lower end cover 2; an O-ring 3 is provided between the lower end cover 2 and the upper end cover 1; a flange 201 is provided on the outer wall of the lower end cover 2, below the O-ring 3, and correspondingly, an annular cap brim 101 is provided on the outer side of the lower end of the upper end cover 1; the annular cap brim 101 is fixed to the flange 201 by threaded connection; an annular convex brim 102 is provided on the upper part of the inner wall of the upper end cover 1; the annular convex brim 102 is connected to the upper end cover 1 An accommodating cavity is formed between the top plates of the end cover 1; a heat sink 5 for mounting a controller 4 is arranged in the accommodating cavity; the heat sink 5 is pressed and fixed on the top plate of the upper end cover 1 (the upper surface of the heat sink 5 is in conflict with the inside of the top plate) by an annular retaining ring 6 (an opening is arranged on the annular retaining ring 6 so that the annular retaining ring 6 has elasticity); a first boss 103 is arranged on the side of the upper end cover 1; a wire outlet hole is opened on the first boss 103, and a wire outlet seat 8 for mounting a cable 7 is arranged at the wire outlet hole; an axial hole 202 for mounting the rotating shaft of the aerator motor is arranged in the middle of the lower end cover 2.

[0030] When in use, the lower end cover 2 is assembled on the motor of the aerator, and the rotating shaft of the motor is inserted into the shaft hole 202 .

[0031] Example:

[0032] See also Figure 4 and Figure 5 In this embodiment, an annular edge guard 105 is provided at the bottom of the outer edge of the annular brim 101; the annular edge guard 105 is sleeved outside the flange 201. Thus, the sealing performance of the end cover can be improved. Furthermore, an annular limiting boss 204 is provided on the outer peripheral surface of the flange 201, and the bottom of the annular edge guard 105 contacts the upper surface of the annular limiting boss 204.

[0033] See also Figure 6 In this embodiment, an annular groove 203 is formed on the outer wall of the lower end cover 2, and the O-type sealing ring 3 is located in the annular groove 203. Thus, the O-type sealing ring 3 can be limited and positioned.

[0034] In this embodiment, the side of the upper end cover 1 is provided with a second boss 104 opposite to the position of the first boss 103; the second boss 104 is provided with an air pressure test hole, and a screw plug 9 is provided at the air pressure test hole. After the end cover is installed, the screw plug 9 can be removed and an air pressure test can be performed to ensure the performance of the aerator. Furthermore, the air pressure test hole is a threaded hole, the screw plug 9 is connected to the air pressure test hole by threads, and a gasket is provided between the head of the screw plug 9 and the second boss 104.

[0035] In this embodiment, a limiting step 801 is provided on the outer circumference of the outlet seat 8; the limiting step 801 is welded and fixed to the outer side of the first boss 103. The outlet seat 8 and the upper end cover 1 are fixed by welding, and the connection is strong, and the structural rigidity is large and the integrity is good. Furthermore, the outlet seat 8 is made of stainless steel.

[0036] In this embodiment, the upper end cover 1 is formed in one piece with stainless steel. Stainless steel has the advantages of heat resistance and low temperature resistance, and has good corrosion resistance, and can be used in harsh environments, so that the upper end cover 1 is more suitable for the use conditions of the aerator; in addition, the upper end cover 1 is formed in one piece, which is convenient to manufacture and convenient for mass production. Further, the heat sink 5 is an aluminum plate. Aluminum plates have the advantages of good heat dissipation performance, low cost, and easy processing. Using aluminum plates to make the heat sink 5 is conducive to cost control.

[0037] In this embodiment, the annular cap brim 101 is connected and fixed to the flange 201 by bolts 12; six A mounting holes 106 are evenly spaced along the circumference of the annular cap brim 101, and correspondingly, six B mounting holes 205 are evenly spaced along the circumference of the flange 201; the bolts 12 pass through the A mounting holes 106 and the B mounting holes 205 in sequence and are locked by nuts.

[0038] As a specific application of the end cover for the permanent magnet variable frequency aerator of this embodiment:

[0039] See also Figures 7 to 9, a controller assembly for a permanent magnet variable frequency aerator, comprising an end cover, a controller 4 and a cable 7; the end cover is the end cover for the permanent magnet variable frequency aerator in the present embodiment mentioned above; the controller 4 is fixed on a heat sink 5; the cable 7 is mounted on a lead-out seat 8 and is locked and fixed by a lead-out nut 10 (the lead-out seat 8 and the lead-out nut 10 are both provided with through holes for the cable to pass through in the middle, and the lead-out seat 8 is sleeved on the outside of the lead-out nut 10, and the two are connected by threads); an inclined surface 802 is formed on the inner wall of the lead-out seat 8, and the inclined surface 802 is in contact with the inner side surface of a limit head 701 on the cable 7; the outer side surface of the limit head 701 is against the end of the lead-out nut 10; a washer 11 is provided between the limit head 701 and the lead-out nut 10.

[0040] The above general description of the utility model involved in this application and the description of its specific implementation method should not be understood as limiting the technical solution of the utility model. Based on the disclosure of this application, those skilled in the art can add, reduce or combine the disclosed technical features in the above general description or / and the specific implementation method (including examples) without violating the constituent elements of the utility model involved, to form other technical solutions within the scope of protection of this application.

Claims

1. End cover for permanent magnet variable frequency aerator, characterized by: The invention comprises an upper end cover (1) and a lower end cover (2); the upper end cover (1) is a cap structure with an opening facing downwards and is sleeved on the upper part of the lower end cover (2); an O-ring (3) is provided between the lower end cover (2) and the upper end cover (1); a flange (201) is provided on the outer wall of the lower end cover (2) below the O-ring (3); and correspondingly, an annular cap brim (101) is provided on the outer side of the lower end of the upper end cover (1); the annular cap brim (101) is fixed to the flange (201) by threaded connection; an annular convex brim (101) is provided on the upper part of the inner wall of the upper end cover (1) 102); a receiving cavity is formed between the annular convex edge (102) and the top plate of the upper end cover (1); a heat sink (5) for mounting a controller (4) is arranged in the receiving cavity; the heat sink (5) is fixed to the top plate of the upper end cover (1) by means of an annular retaining ring (6); a first boss (103) is arranged on the side of the upper end cover (1); a wire outlet hole is formed on the first boss (103), and a wire outlet seat (8) for mounting a cable (7) is arranged at the wire outlet hole; an axial hole (202) for mounting a rotating shaft of an aerator motor is arranged in the middle of the lower end cover (2).

2. The end cover for the permanent magnet variable frequency aerator according to claim 1 is characterized in that: An annular edge guard (105) is provided at the bottom of the outer edge of the annular brim (101); the annular edge guard (105) is sleeved outside the flange (201).

3. The end cover for the permanent magnet variable frequency aerator according to claim 1 is characterized in that: An annular groove (203) is provided on the outer wall of the lower end cover (2), and the O-type sealing ring (3) is located in the annular groove (203).

4. The end cover for the permanent magnet variable frequency aerator according to claim 1 is characterized in that: A second boss (104) is provided on the side of the upper end cover (1) opposite to the first boss (103); an air pressure test hole is provided on the second boss (104), and a screw plug (9) is provided at the air pressure test hole.

5. The end cover for the permanent magnet variable frequency aerator according to claim 1 is characterized in that: A limiting step (801) is provided on the outer peripheral surface of the outlet seat (8); the limiting step (801) is welded and fixed to the outer side surface of the first boss (103).

6. The end cover for the permanent magnet variable frequency aerator according to claim 1 is characterized in that: The upper end cover (1) is made of stainless steel and is integrally formed.

7. The end cover for the permanent magnet variable frequency aerator according to claim 1 is characterized in that: The heat dissipation plate (5) is an aluminum plate.

8. A controller assembly for a permanent magnet variable frequency aerator, comprising an end cover, a controller (4) and a cable (7); characterized in that: The end cover is the end cover for the permanent magnet variable frequency aerator according to claim 1; the controller (4) is fixed on the heat sink (5); the cable (7) is installed on the outlet seat (8) and is locked and fixed by the outlet nut (10).

9. The controller assembly for the permanent magnet variable frequency aerator according to claim 8 is characterized in that: A limiting step (801) is provided on the outer circumferential surface of the outlet seat (8); the limiting step (801) is welded and fixed to the outer side surface of the first boss (103); an inclined surface (802) is machined and formed on the inner wall of the outlet seat (8), and the inclined surface (802) and the inner side surface of the limiting head (701) on the cable (7) are mutually abutted; the outer side surface of the limiting head (701) abuts against the end of the outlet nut (10).

10. The controller assembly for the permanent magnet variable frequency aerator according to claim 9 is characterized in that: A washer (11) is provided between the limiting head (701) and the outlet nut (10).

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