Explosion-proof motor casing

Abstract

The utility model discloses an explosion-proof motor casing, which relates to the technical field of explosion-proof motors, comprises a casing body with a plurality of radiating fins arranged on the side face and an end cover arranged at one end of the casing body, and is characterized in that a plurality of air outlet holes are formed in the back face, close to the radiating fins, of the end cover, and the air outlet holes are located between the adjacent radiating fins; an air distribution cavity is formed in the end cover, and an air pumping port is formed in the side face of the end cover; the interior of the air distribution cavity is divided into a front cavity and a rear cavity through a partition plate, the front cavity is communicated with the air pumping opening, the rear cavity is communicated with the air outlet holes, a plurality of pressure relief holes of the front cavity and the rear cavity are formed in the partition plate, pressure relief assemblies are arranged in the pressure relief holes, and airflow flowing out of the air outlet holes flows to the positions between the adjacent cooling fins, so that the contact area of the airflow and the shell is maximized, and the heat dissipation efficiency is improved. Therefore, the explosion-proof motor can be quickly cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof motors, in particular to an explosion-proof motor casing. Background Art

[0002] Explosion-proof motors are motors that can be used in flammable and explosive places and do not generate sparks during operation. Explosion-proof motors are mainly used in coal mines, oil and gas, petrochemical and chemical industries. In addition, they are also widely used in textiles, metallurgy, city gas, transportation, grain and oil processing, papermaking, medicine and other sectors. As the main power equipment, explosion-proof motors are usually used to drive pumps, fans, compressors and other transmission machinery.

[0003] Due to the explosion-proof requirements, existing explosion-proof motors are designed with high sealing and poor heat dissipation effect. Although the explosion-proof motor can be cooled by an external heat dissipation component, the casing of the existing explosion-proof motor has no structural improvement for the external heat dissipation component, which also limits the heat dissipation and cooling effect of the external heat dissipation component on the explosion-proof motor. Utility Model Content

[0004] The purpose of the utility model is to provide an explosion-proof motor casing to solve the above technical problems.

[0005] Based on the above purpose, the utility model provides an explosion-proof motor casing, comprising a shell with a plurality of heat dissipation fins arranged on the side, and an end cover arranged at one end of the shell, wherein a plurality of air outlets are arranged on the back of the end cover close to the heat dissipation fins, and the air outlets are located between adjacent heat dissipation fins;

[0006] An air distribution cavity is provided inside the end cover, and an air pump port is provided on the side of the end cover;

[0007] The air distribution cavity is divided into a front cavity and a rear cavity by a partition, the front cavity is connected to the pump air port, and the rear cavity is connected to multiple air outlet holes. The partition is provided with multiple pressure relief holes for the front cavity and the rear cavity, and a pressure relief component is provided in the pressure relief hole.

[0008] Furthermore, the pressure relief assembly includes an elastic film and an inner hoop, and a sink groove for the elastic film and the inner hoop to be installed is provided on the partition and located at the air outlet, and the elastic film is positioned in the sink groove through the inner hoop;

[0009] The elastic film is provided with a narrow opening. The elastic film is deformed under the action of the air pressure in the front cavity, and the narrow opening is opened, so that the gas in the front cavity flows into the rear cavity through the opened narrow opening.

[0010] Furthermore, a plurality of the elastic films are connected to each other in a ring shape.

[0011] Furthermore, the plurality of inner hoops are connected via an annular orifice plate, the annular orifice plate is provided with a plurality of circular holes for gas to pass through, and the inner hoops are arranged at the circular holes.

[0012] Furthermore, the end cover comprises an annular body provided with an air distribution cavity, an air pumping port and an air outlet, and an annular cover plate arranged on the annular body for closing an exposed end of the air distribution cavity.

[0013] Beneficial effects of the utility model:

[0014] The utility model uses an air pump connected to the pump air port to pump gas into the front cavity. As the gas pressure in the front cavity increases, the pressure relief component connects the front cavity with the rear cavity, so that the gas in the front cavity enters the rear cavity through multiple pressure relief holes and the pressure relief component, so as to achieve uniform distribution of the gas in the rear cavity. The airflow flowing out through the air outlet flows between adjacent heat dissipation fins, so as to maximize the contact area between the airflow and the shell, so as to facilitate rapid heat dissipation and cooling of the explosion-proof motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 For the utility model Figure 1 Rear view of

[0018] Figure 3 It is a structural schematic diagram of the air distribution cavity of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the annular main body of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the partition of the utility model;

[0021] Figure 6 It is a schematic diagram of the structure of the elastic film of the utility model;

[0022] Figure 7 It is a structural schematic diagram of the annular orifice plate of the utility model;

[0023] Figure 8 It is a cross-sectional view of the end cover of the utility model;

[0024] Fig. 9 For the utility model Figure 5 The enlarged view of point A in the middle;

[0025] Fig.10 For the utility model Figure 6 The enlarged view of point B in the middle;

[0026] Fig.11 For the utility model Figure 7 Enlarged view of point C in the middle.

[0027] The numbers in the figure are:

[0028] 1- heat sink fin; 2- shell; 3- end cover; 4- air outlet; 5- air distribution cavity; 6- pump air port; 7- partition; 8- front cavity; 9- rear cavity; 10- pressure relief hole; 11- pressure relief assembly; 12- sink; 13- narrow mouth; 14- annular orifice plate;

[0029] 301- annular body; 302- annular cover plate;

[0030] 1101- elastic film; 1102- inner hoop. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0032] like Figures 1 to 11 As shown, an explosion-proof motor casing comprises a shell 2 with a plurality of heat dissipation fins 1 arranged on the side, and an end cover 3 arranged at one end of the shell 2, and a plurality of air outlet holes 4 are arranged on the back side of the end cover 3 close to the heat dissipation fins 1, and the air outlet holes 4 are located between adjacent heat dissipation fins 1;

[0033] An air distribution cavity 5 is provided inside the end cover 3, and an air pumping port 6 is provided on the side of the end cover 3;

[0034] The air distribution cavity 5 is divided into a front cavity 8 and a rear cavity 9 by a partition 7. The front cavity 8 is connected to the pump air port 6, and the rear cavity 9 is connected to multiple air outlet holes 4. The partition 7 is provided with multiple pressure relief holes 10 for the front cavity 8 and the rear cavity 9, and a pressure relief assembly 11 is provided in the pressure relief hole 10.

[0035] Gas is pumped into the front cavity 8 by an air pump connected to the pump gas port 6. As the gas pressure in the front cavity 8 increases, the pressure relief component 11 connects the front cavity 8 with the rear cavity 9, so that the gas in the front cavity 8 enters the rear cavity 9 through the multiple pressure relief holes 10 and the pressure relief component 11, so as to achieve uniform distribution of gas in the rear cavity 9, so that the multiple air outlet holes 4 connected to the rear cavity 9 can discharge air uniformly. The airflow flowing out of the air outlet holes 4 flows between adjacent heat dissipation fins 1, so as to maximize the contact area between the airflow and the housing 2, so as to facilitate rapid heat dissipation and cooling of the explosion-proof motor.

[0036] The pressure relief assembly 11 includes an elastic film 1101 and an inner hoop 1102 . A sink 12 for inserting the elastic film 1101 and the inner hoop 1102 is provided on the partition 7 at the air outlet 4 . The elastic film 1101 is positioned in the sink 12 through the inner hoop 1102 .

[0037] The elastic film 1101 is provided with a slit 13 . The elastic film 1101 is deformed under the action of the air pressure in the front cavity 8 and causes the slit 13 to open, so that the gas in the front cavity 8 flows into the rear cavity 9 through the opened slit 13 .

[0038] Further optimization of the above embodiment is that the multiple elastic films 1101 are connected to each other in a ring shape, so as to facilitate the unified disassembly and assembly of the multiple elastic films 1101. Similarly, the multiple inner hoops 1102 are connected through the annular orifice plate 14, and the annular orifice plate 14 is provided with multiple circular holes for gas to pass through, and the inner hoops 1102 are arranged at the circular holes. The annular insert does not need to be replaced during subsequent use, and does not affect the subsequent use experience.

[0039] The end cover 3 includes an annular main body 301 provided with an air distribution cavity 5, an air pump port 6 and an air outlet 4, and an annular cover plate 302 arranged on the annular main body 301 for closing the exposed end of the air distribution cavity 5 to facilitate the disassembly and assembly of the pressure relief component 11 in the air distribution cavity 5.

[0040] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the embodiments disclosed above are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. An explosion-proof motor casing, comprising a casing (2) with a plurality of heat dissipation fins (1) arranged on the side, and an end cover (3) arranged at one end of the casing (2), characterized in that: A plurality of air outlet holes (4) are provided on the back side of the end cover (3) close to the heat dissipation fins (1), and the air outlet holes (4) are located between adjacent heat dissipation fins (1); An air distribution cavity (5) is provided inside the end cover (3), and an air pumping port (6) is provided on the side of the end cover (3); The air distribution cavity (5) is divided into a front cavity (8) and a rear cavity (9) by a partition (7); the front cavity (8) is communicated with the pump gas port (6); the rear cavity (9) is communicated with a plurality of air outlet holes (4); a plurality of pressure relief holes (10) for the front cavity (8) and the rear cavity (9) are provided on the partition (7); a pressure relief assembly (11) is provided in the pressure relief hole (10).

2. An explosion-proof motor casing according to claim 1, characterized in that: The pressure relief assembly (11) comprises an elastic film (1101) and an inner hoop (1102); a sink (12) for inserting the elastic film (1101) and the inner hoop (1102) is provided on the partition (7) at the air outlet (4); the elastic film (1101) is positioned in the sink (12) via the inner hoop (1102); The elastic film (1101) is provided with a narrow opening (13), and the elastic film (1101) is deformed under the action of the air pressure in the front chamber (8), and the narrow opening (13) is opened, so that the gas in the front chamber (8) flows into the rear chamber (9) through the opened narrow opening (13).

3. An explosion-proof motor casing according to claim 2, characterized in that: The plurality of elastic films (1101) are connected to each other in a ring shape.

4. The explosion-proof motor housing according to claim 2, characterized in that: The plurality of inner hoops (1102) are connected via an annular orifice plate (14); the annular orifice plate (14) is provided with a plurality of circular holes for gas to pass through, and the inner hoops (1102) are arranged at the circular holes.

5. The explosion-proof motor housing according to claim 1, characterized in that: The end cover (3) comprises an annular main body (301) provided with an air distribution cavity (5), an air pumping port (6) and an air outlet hole (4), and an annular cover plate (302) arranged on the annular main body (301) and used for closing an exposed end of the air distribution cavity (5).

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