Submersible pump protector driven by permanent magnet motor

Abstract

The utility model discloses a permanent magnet motor drive submersible pump protector which comprises a shell, a dust cover is connected in the shell, the dust cover divides the shell into an exhaust chamber and an air inlet chamber from top to bottom in sequence, an air inlet and an air outlet are formed in the side wall of the shell, the air inlet is communicated with the air inlet chamber, and the air outlet is communicated with the air outlet. The exhaust port is communicated with the exhaust chamber, and a fan is connected in the exhaust chamber; a mounting chamber for mounting electrical elements is formed in the dust cover, through holes are formed in the top and the bottom of the dust cover, and the exhaust chamber and the air inlet chamber are communicated with the mounting chamber through the through holes. The air flow direction in the shell is limited to flow from bottom to top through the arrangement that the dustproof cover is matched with the fan, so that dust entering the shell can be settled in the air inlet chamber under the action of gravity, the influence of the dust on the interior of the mounting chamber is reduced, and meanwhile the whole-day heat dissipation effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of submersible pump protectors, in particular to a submersible pump protector driven by a permanent magnet motor. Background Art

[0002] Submersible pumps are important equipment for extracting water from deep wells. When in use, the entire unit submerges in water to extract groundwater to the surface for use as domestic water, farmland irrigation, etc. However, when in use, submersible pumps are prone to phase loss, three-phase imbalance, leakage and other faults. Therefore, submersible pumps usually need to be equipped with protectors when in use to monitor, alarm or cut off power supply for circuit faults. Users can accurately know the current status of the submersible pump in real time by observing the protector.

[0003] In the related art, such as a submersible pump comprehensive multifunctional protector disclosed in application number CN202120589925.X, which relates to the technical field of submersible pump protectors, the present application includes a shell, the shell includes a fixed plate and a plurality of movable plates, the fixed plate is provided with a plurality of openings, the movable plate is used to close with the openings, the movable plate is penetrated with heat dissipation holes, one side of the movable plate is hinged with the mouth wall of the opening, the side of the movable plate close to the inner cavity of the shell is detachably connected with a dust filter screen plate, and the fixed plate is provided with a dustproof part at the opening. The above scheme helps to improve the dustproof performance of the heat dissipation holes of the shell and the connection between the movable plate and the fixed plate through the cooperation of the fixed plate, the movable plate, the dust filter screen plate and the dustproof part, thereby ensuring the use performance of the submersible pump comprehensive multifunctional protector; and helps to ensure the detection efficiency of the submersible pump comprehensive multifunctional protector for circuit faults, thereby ensuring the safety of electrical equipment.

[0004] Although the above technical solution improves the dustproof performance, it also affects the heat dissipation effect. In addition, there is also a situation where the heat dissipation holes are blocked due to forgetting to open the movable plate during use, so improvement is needed. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a permanent magnet motor driven submersible pump protector, which can ensure heat dissipation while improving the overall dustproof effect.

[0006] According to the first aspect of the present utility model, the permanent magnet motor driven submersible pump protector comprises a housing, a dust cover is connected to the housing, the dust cover sequentially separates the housing from top to bottom to form an exhaust chamber and an air inlet chamber, an air inlet and an exhaust port are opened on the side wall of the housing, the air inlet is communicated with the air inlet chamber, the exhaust port is communicated with the exhaust chamber, and a fan is connected to the exhaust chamber;

[0007] An installation chamber for installing electrical components is provided in the dust cover, through holes are provided at the top and the bottom of the dust cover, and the exhaust chamber and the air inlet chamber are communicated with the installation chamber through the through holes.

[0008] The permanent magnet motor driven submersible pump protector according to the embodiment of the utility model has at least the following beneficial effects: the gas flow in the shell is limited to flow from bottom to top by the dust cover and the setting of the fan, so that the dust entering the shell will settle in the air intake chamber under the action of gravity, reducing the impact of dust on the installation room, while also ensuring the heat dissipation effect throughout the day.

[0009] According to some embodiments of the utility model, the dust cover includes a dust cover body and an annular baffle plate horizontally connected to the periphery of the dust cover body, an annular step is horizontally arranged on the inner wall of the shell, and the annular baffle plate is sealingly connected to the annular step.

[0010] According to some embodiments of the utility model, a sealing groove is provided on the annular step, the sealing groove is filled with a sealing ring, and the annular baffle is sealingly connected to the annular step by squeezing the sealing ring.

[0011] According to some embodiments of the present invention, a plurality of sealing grooves are evenly arranged along the radial direction of the annular step, and a plurality of sealing rings are adapted and arranged one-to-one.

[0012] According to some embodiments of the utility model, shutters are provided on the air inlet and the exhaust port, and the flipping direction of the shutters located at the air inlet is from the vertical direction from bottom to top toward the inside of the shell, and the flipping direction of the shutters located at the exhaust port is from the vertical direction from bottom to top toward the outside of the shell.

[0013] According to some embodiments of the present invention, the bottom of the dust cover has a first annular protrusion, which extends toward the bottom of the shell and has a gap with the bottom of the shell.

[0014] According to some embodiments of the present invention, the through hole located at the bottom of the dust cover is located in the first annular protrusion.

[0015] According to some embodiments of the present invention, there are multiple air inlets and exhaust ports, which are evenly distributed on the circumference of the shell.

[0016] According to some embodiments of the present invention, the top of the dust cover has a second annular protrusion, and the fan is located at the top center of the dust cover.

[0017] According to some embodiments of the present utility model, a guide cone is connected to the center of the top of the inner wall of the shell, and the tip of the guide cone faces the center of the dust cover.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 This is a structural schematic diagram of a permanent magnet motor driven submersible pump protector according to an embodiment of the utility model.

[0021] Figure 2 This is a structural schematic diagram of a permanent magnet motor driven submersible pump protector according to another embodiment of the utility model.

[0022] 10. Shell; 11. Exhaust chamber; 12. Inlet chamber; 13. Exhaust port; 14. Inlet port; 15. Annular step; 16. Guide cone; 21. Dust cover body; 22. Through hole; 23. Annular baffle; 24. First annular protrusion; 25. Second annular protrusion; 30. Fan. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] refer to Figure 1 As shown, the permanent magnet motor driven submersible pump protector according to the embodiment of the utility model includes a housing 10, a dust cover is connected to the housing 10, the dust cover sequentially separates the housing 10 from top to bottom to form an exhaust chamber 11 and an air inlet chamber 12, an air inlet 14 and an exhaust port 13 are opened on the side wall of the housing 10, the air inlet 14 is communicated with the air inlet chamber 12, the exhaust port 13 is communicated with the exhaust chamber 11, and a fan 30 is connected to the exhaust chamber 11;

[0028] An installation chamber for installing electrical components is provided in the dust cover. Through holes 22 are provided at the top and bottom of the dust cover. The exhaust chamber 11 and the air inlet chamber 12 are connected to the installation chamber through the through holes 22 .

[0029] During actual use, the dust cover is combined with the fan 30 to limit the gas flow in the shell 10 to flow from bottom to top, so that the dust entering the shell 10 will settle in the air inlet chamber 12 under the action of gravity, reducing the impact of dust on the installation room, while also ensuring the heat dissipation effect throughout the day.

[0030] Specifically, the dust cover includes a dust cover body 21 and an annular baffle 23 horizontally connected to the periphery of the dust cover body 21 . An annular step 15 is horizontally arranged on the inner wall of the housing 10 , and the annular baffle 23 is sealingly connected to the annular step 15 .

[0031] More specifically, a sealing groove (not shown in the figure) is provided on the annular step 15 , and a sealing ring (not shown in the figure) is filled in the sealing groove. The annular baffle 23 is sealed and connected to the annular step 15 by squeezing the sealing ring.

[0032] In order to further improve the sealing performance and ensure that the gas flows from bottom to top, in some specific embodiments of the present invention, multiple sealing grooves are evenly arranged along the radial direction of the annular step 15, and multiple sealing rings are adapted and arranged one by one.

[0033] In some specific embodiments of the utility model, the air inlet 14 and the air outlet are respectively arranged on the upper and lower sides of the annular step 15, and the distance between the air inlet 14 and the air outlet and the annular step 15 is not greater than 3 cm. Through this design, the vertical flow distance of the airflow in the air inlet chamber 12 and the exhaust chamber 11 can be extended, and the possibility of dust directly flowing into the installation room is reduced under the action of the outer cover of the dust cover.

[0034] In some specific embodiments of the utility model, shutters are provided on both the air inlet 14 and the exhaust port 13 (in the figure), and the flip direction of the shutters located at the air inlet 14 is from the vertical direction to the inside of the housing 10 and from the bottom to the top, and the flip direction of the shutters located at the exhaust port 13 is from the vertical direction to the outside of the housing 10 and from the bottom to the top. Specifically, the structure of the shutters can refer to a connecting rod mechanism, a shutter for an exhaust fan, and an exhaust fan disclosed in application number CN201520607915.9. With this design, when the submersible pump protector is not working, that is, the fan 30 in the exhaust chamber 11 is not working, the gas in the shell 10 flows freely, and the pressure difference between the inside and outside of the shell 10 will not cause the shutter to flip, and the shutter blocks and closes the air inlet 14 and the exhaust port 13. At this time, the shell 10 is blocked by the shutter to prevent dust from entering; and when the submersible pump protector is working, the fan 30 in the exhaust chamber 11 works to dissipate heat. At this time, the gas flow direction in the shell 10 flows from the air inlet chamber 12 to the installation chamber and then flows into the exhaust chamber 11. At this time, the air pressure in the air inlet chamber 12 is lower than the air pressure outside the shell 10. , the shutters on the air inlet 14 flip from the vertical direction toward the inside of the shell 10 from bottom to top, the air inlet 14 is turned on, the gas outside the shell 10 enters the air inlet chamber 12 and enters the installation chamber in turn under the guidance of the fan 30 in the exhaust chamber 11, and then flows into the exhaust chamber 11, and exchanges heat with the electrical components in the installation chamber during the flow process. At this time, the air pressure in the exhaust chamber 11 increases and is greater than the air pressure outside the shell 10, and the flipping direction of the shutters on the exhaust port 13 flips from the vertical direction toward the outside of the shell 10 from bottom to top, the exhaust port 13 is turned on, and the gas in the exhaust chamber 11 can flow out from the exhaust port 13 smoothly.

[0035] refer to Figure 2 As shown, in some specific embodiments of the present invention, the bottom of the dust cover has a first annular protrusion 24 , which extends toward the bottom of the housing 10 and has a gap with the bottom of the housing 10 .

[0036] Specifically, the through hole 22 at the bottom of the dust cover is located in the first annular protrusion 24. Through the above design, the process of gas flowing downward in the air inlet chamber 12 after entering the air inlet 14 can be prolonged. At the same time, according to the Coanda effect, the airflow in the air inlet chamber 12 will move along the first annular protrusion 24 and enter the installation room, and the dust mixed in the airflow will settle at the bottom of the air inlet chamber 12 due to the reduction of gas flow rate and gravity, thereby achieving a dust-proof effect in the installation room; at the same time, due to the existence of static electricity, the more dust settles, the more it attracts the dust in the airflow to continue to settle, thereby further improving the dust-proof effect.

[0037] In some specific embodiments of the utility model, there are multiple air inlets 14 and exhaust ports 13, which are evenly distributed on the circumference of the shell 10. Specifically, the top of the dust cover has a second annular protrusion 25, and the fan 30 is located at the top center of the dust cover. More specifically, a guide cone 16 is connected to the top center of the inner wall of the shell 10, and the tip of the guide cone 16 faces the center of the dust cover. Through the above design, the gas flow can be smoother, and the second annular protrusion 25 further hinders the possibility of the gas entering the exhaust chamber 11 from the exhaust port 13 during the exchange of gas with the outside of the shell 10 to enter the installation room through the through hole 22 on the top of the dust cover, and a reasonable design of the exhaust chamber 11 can improve the heat dissipation efficiency.

[0038] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A permanent magnet motor driven submersible pump protector, characterized in that: The invention comprises a shell (10), wherein a dust cover is connected to the inside of the shell (10), wherein the dust cover sequentially separates the shell (10) from top to bottom to form an exhaust chamber (11) and an air inlet chamber (12), wherein an air inlet (14) and an exhaust port (13) are provided on the side wall of the shell (10), wherein the air inlet (14) is communicated with the air inlet chamber (12), wherein the exhaust port (13) is communicated with the exhaust chamber (11), and wherein a fan (30) is connected to the exhaust chamber (11); An installation chamber for installing electrical components is provided in the dust cover, through holes (22) are provided at the top and bottom of the dust cover, and the exhaust chamber (11) and the air inlet chamber (12) are both connected to the installation chamber through the through holes (22).

2. The permanent magnet motor driven submersible pump protector according to claim 1, characterized in that: The dust cover comprises a dust cover body (21) and an annular baffle (23) horizontally connected to the periphery of the dust cover body (21); an annular step (15) is horizontally arranged on the inner wall of the shell (10); and the annular baffle (23) is sealingly connected to the annular step (15).

3. The permanent magnet motor driven submersible pump protector according to claim 2 is characterized in that: The annular step (15) is provided with a sealing groove, the sealing groove is filled with a sealing ring, and the annular baffle (23) is sealingly connected to the annular step (15) by squeezing the sealing ring.

4. The permanent magnet motor driven submersible pump protector according to claim 3 is characterized in that: A plurality of sealing grooves are evenly arranged along the radial direction of the annular step (15), and a plurality of sealing rings are adapted and arranged one by one.

5. The permanent magnet motor driven submersible pump protector according to claim 1, characterized in that: The air inlet (14) and the air outlet (13) are both provided with shutters; the shutters located at the air inlet (14) flip in a direction from the vertical direction toward the inside of the shell (10) from bottom to top, and the shutters located at the air outlet (13) flip in a direction from the vertical direction toward the outside of the shell (10) from bottom to top.

6. The permanent magnet motor driven submersible pump protector according to claim 1, characterized in that: The bottom of the dust cover has a first annular protrusion (24), which extends toward the bottom of the housing (10) and has a gap with the bottom of the housing (10).

7. The permanent magnet motor driven submersible pump protector according to claim 6, characterized in that: The through hole (22) located at the bottom of the dust cover is located inside the first annular protrusion (24).

8. The permanent magnet motor driven submersible pump protector according to claim 1, characterized in that: There are a plurality of the air inlet (14) and the air outlet (13) which are evenly distributed on the circumference of the shell (10).

9. The permanent magnet motor driven submersible pump protector according to claim 8, characterized in that: The top of the dust cover is provided with a second annular protrusion (25), and the fan (30) is located at the top center of the dust cover.

10. The permanent magnet motor driven submersible pump protector according to claim 9, characterized in that: A guide cone (16) is connected to the center of the top of the inner wall of the shell (10), and the tip of the guide cone (16) faces the center of the dust cover.

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