Explosion-proof electric actuator

Abstract

The utility model relates to the field of electric actuators, in particular to an explosion-proof electric actuator which comprises an actuator body, a base arranged at the bottom of the actuator body, a refrigeration heat dissipation mechanism and a pressure relief heat dissipation mechanism. The refrigeration heat dissipation mechanism is arranged at the top of the actuator body and used for manufacturing cold air and cooling the actuator body. The pressure relief and heat dissipation mechanism is arranged in the actuator body and used for opening the actuator body for heat dissipation treatment. Through the arrangement of the pressure relief heat dissipation mechanism and the refrigeration heat dissipation mechanism, the actuator body can be automatically opened, and cold air is input into the actuator body, so that the heat dissipation speed is increased, meanwhile, high pressure in the actuator is poured out, the temperature of a motor and internal elements can be effectively controlled through rapid pressure relief heat dissipation, the overheating phenomenon is avoided, and the service life of the actuator is prolonged. Therefore, the explosion risk is reduced, and it can be ensured that the actuator meets the relevant explosion-proof standard and safety specification when operating in a dangerous environment.

Description

Technical Field

[0001] The utility model relates to the field of electric actuators, in particular to an explosion-proof electric actuator. Background Art

[0002] An electric actuator is an instrument applied to various industrial automation process control links. The electric actuator has the characteristics of safety guarantee, protection device, multiple speeds, corrosion and rust prevention, intelligent numerical control, etc.; it is divided into angular stroke and linear stroke according to the motion mode.

[0003] Chinese Patent with publication number CN107327611A discloses a compact explosion-proof electric actuator, including a fixed connecting plate. One end side wall of the fixed connecting plate is fixedly connected with an external plate. The outer wall of the external plate is fixedly embedded with a first fixing bolt. The middle of the outer wall of the external plate is fixedly connected with a first connecting slot. One end side wall of the fixed connecting plate is fixedly connected with an adjustable shut-off valve. The lower end of the adjustable shut-off valve is fixedly connected with a three-phase asynchronous motor. The upper end outer wall of the three-phase asynchronous motor is rotationally connected with a connecting rotating shaft. The upper end of the connecting rotating shaft is fixedly connected with a rotating handle. One end outer wall of the adjustable shut-off valve is fixedly connected with a fixed explosion-proof valve. One end outer wall of the fixed explosion-proof valve is fixedly connected with a second external connecting steel plate. One end side wall of the second external connecting steel plate is fixedly connected with an external protective housing. The inner cavity side wall of the external protective housing is fixedly connected with a rotating shaft. This utility model is simple to operate and has high practical performance.

[0004] However, the above disclosed solution has the following deficiencies: The existing explosion-proof electric actuator generates a large amount of heat during use, and at the same time, the internal air pressure rises and cannot be dissipated in time, resulting in damage to the electric actuator. Therefore, it is necessary to invent an explosion-proof electric actuator to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to propose an explosion-proof electric actuator aiming at the problem of inability to quickly dissipate heat and relieve pressure in the background art.

[0006] The technical solution of the utility model: An explosion-proof electric actuator includes an actuator body and a base arranged at the bottom of the actuator body; it further includes:

[0007] A refrigeration and heat dissipation mechanism, arranged at the top of the actuator body, used to generate cold air and cool the actuator body;

[0008] And a pressure relief and heat dissipation mechanism, arranged inside the actuator body, used to open the actuator body for heat dissipation treatment.

[0009] Preferably, the refrigeration and heat dissipation mechanism includes a temperature detector and a jet component;

[0010] The temperature detector is arranged at the bottom of the pressure relief and heat dissipation mechanism;

[0011] The jet component is arranged at the top of the actuator body and is used to generate cold air and jet it out to cool the actuator body.

[0012] Preferably, the jet component includes a refrigerator, a connection box, a shunt ring, a fixing rod II and a blow pipe;

[0013] The fixing rod II is arranged at the top of the actuator body, the shunt ring is arranged at the top of the fixing rod II, the connection box is arranged at the top of the shunt ring, the refrigerator is arranged at the top of the connection box, and the blow pipe is arranged inside the shunt ring.

[0014] Preferably, the pressure relief and heat dissipation mechanism includes a fixing cylinder, a power component and a heat dissipation component;

[0015] The fixing cylinder is arranged inside the actuator body;

[0016] The power component is arranged inside the fixing cylinder and is located in the lower half part to provide power for the heat dissipation component;

[0017] The heat dissipation component is arranged inside the fixing cylinder and is located in the upper half part to open the actuator body for heat dissipation.

[0018] Preferably, the power component includes a thermal expansion airbag, a heat transfer plate, an air inlet hole and a connection frame;

[0019] The air inlet hole is arranged on the fixing cylinder, the heat transfer plate is arranged at the bottom of the fixing cylinder, the thermal expansion airbag is arranged on the top of the heat transfer plate, and the connection frame is arranged on the top of the thermal expansion airbag.

[0020] Preferably, the heat dissipation component includes a straight slide rail, a fixing rod I, a seal and a pressure relief and heat discharge hole;

[0021] The straight slide rail is slidably arranged on the side of the connection frame, and the side of the straight slide rail close to the fixing cylinder is connected to the inside of the fixing cylinder. The fixing rod I is arranged on the top of the connection frame, the seal is arranged on the top of the fixing rod I, and the pressure relief and heat discharge hole is arranged on the side of the seal.

[0022] Compared with the prior art, the utility model has the following beneficial technical effects: through the setting of the pressure relief and heat dissipation mechanism and the refrigeration and heat dissipation mechanism, the actuator body can be automatically opened, and cold air can be input into it, so as to improve the heat dissipation speed. At the same time, the high pressure inside the actuator is discharged, and through rapid pressure relief and heat dissipation, the temperature of the motor and internal components can be effectively controlled, avoiding overheating, thus reducing the explosion risk, helping to ensure that the actuator meets relevant explosion-proof standards and safety specifications when operating in a dangerous environment. At the same time, the actuator can be maintained within the optimal working temperature range, improving its operation stability and reliability, helping to extend the service life of the explosion-proof electric actuator, and reducing the maintenance cost and replacement frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of an embodiment of the utility model;

[0024] Figure 2 is Figure 1 a schematic diagram of the internal structure;

[0025] Figure 3 is a schematic structural diagram of the pressure relief and heat dissipation mechanism;

[0026] Figure 4 is a schematic diagram of the internal structure of the pressure relief and heat dissipation mechanism;

[0027] Figure 5 is a schematic structural diagram of the refrigeration and heat dissipation mechanism.

[0028] Reference numerals: 1, actuator body; 2, base; 301, fixed cylinder; 302, air inlet hole; 303, thermal expansion airbag; 304, heat transfer plate; 305, seal; 306, pressure relief and heat discharge hole; 307, connecting frame; 308, first fixing rod; 309, straight slide rail; 401, cooler; 402, connecting box; 403, flow dividing ring; 404, second fixing rod; 405, temperature detector; 406, air blowing pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Embodiment 1

[0030] As Figures 1 - 5 shown, an explosion-proof electric actuator proposed by the utility model includes an actuator body 1, a base 2 arranged at the bottom of the actuator body 1, a refrigeration and heat dissipation mechanism, and a pressure relief and heat dissipation mechanism:

[0031] The refrigeration and heat dissipation mechanism is arranged at the top of the actuator body 1 to produce cold air and cool the actuator body 1;

[0032] The pressure relief and heat dissipation mechanism is arranged inside the actuator body 1 to open the actuator body 1 for heat dissipation treatment.

[0033] The refrigeration and heat dissipation mechanism includes a temperature detector 405 and a jet component; the temperature detector 405 is arranged at the bottom of the pressure relief and heat dissipation mechanism; the jet component is arranged on the top of the actuator body 1 and is used to generate cold air and eject it to cool the actuator body 1. The jet component includes a refrigerator 401, a connection box 402, a shunt ring 403, a second fixing rod 404 and a blow pipe 406; the second fixing rod 404 is arranged on the top of the actuator body 1, the shunt ring 403 is arranged on the top of the second fixing rod 404, the connection box 402 is arranged on the top of the shunt ring 403, the refrigerator 401 is arranged on the top of the connection box 402, the blow pipe 406 is arranged inside the shunt ring 403, and a plurality of air blowing ports are arranged on the shunt ring 403, and each air blowing port corresponds to the blow pipe 406 one by one. When the temperature detector 405 detects that the internal temperature of the actuator body 1 is too high, it will control the refrigerator 401 to open. After the refrigerator 401 generates cold air, the cold air flows into the shunt ring 403 through the connection box 402, and the cold air in the shunt ring 403 is then blown out through the blow pipe 406.

[0034] Embodiment 2

[0035] As Figures 3 - 4 shown, an explosion-proof electric actuator proposed by the present utility model, compared with Embodiment 1, the structure introduced in this embodiment is described in detail.

[0036] The pressure relief and heat dissipation mechanism includes a fixed cylinder 301, a power component, and a heat dissipation component; the fixed cylinder 301 is arranged inside the actuator body 1; the power component is arranged inside the fixed cylinder 301 and located in the lower half, used to provide power for the heat dissipation component; the heat dissipation component is arranged inside the fixed cylinder 301 and located in the upper half, used to open the actuator body 1 to dissipate heat from it. The power component includes a thermal expansion airbag 303, a heat transfer plate 304, an air inlet hole 302, and a connecting frame 307; the air inlet hole 302 is arranged on the fixed cylinder 301, the heat transfer plate 304 is arranged at the bottom of the fixed cylinder 301, the thermal expansion airbag 303 is arranged on the top of the heat transfer plate 304, the connecting frame 307 is arranged on the top of the thermal expansion airbag 303, the air inlet hole 302 allows the air flow inside the actuator body 1 to enter the fixed cylinder 301 and contact the thermal expansion airbag 303. The heat transfer plate 304 is made of a heat-conducting material, so the hot air can quickly transfer heat to the thermal expansion airbag 303 through the heat transfer plate 304. Through the heat transfer plate 304 and the air inlet hole 302, the heating speed of the thermal expansion airbag 303 will be accelerated. Therefore, the thermal expansion airbag 303 will continuously and rapidly expand as the temperature inside the actuator body 1 rises. Since the position of the heat transfer plate 304 is fixed, it can drive the connecting frame 307 to rise continuously after expansion, thereby driving the heat dissipation component to move for heat dissipation treatment. The heat dissipation component includes a straight slide rail 309, a first fixing rod 308, a seal 305, and a pressure relief and heat discharge hole 306; the straight slide rail 309 is slidably arranged on the side of the connecting frame 307, and the side of the straight slide rail 309 close to the fixed cylinder 301 is connected to the inside of the fixed cylinder 301. The first fixing rod 308 is arranged on the top of the connecting frame 307, the seal 305 is arranged on the top of the first fixing rod 308, the pressure relief and heat discharge hole 306 is arranged on the side of the seal 305, and there are multiple pressure relief and heat discharge holes 306. When the thermal expansion airbag 303 drives the seal 305 to rise through the first fixing rod 308, the actuator body 1 and the outside air are in communication through the pressure relief and heat discharge hole 306, so that heat exchange can be carried out. At the same time, after the pressure relief and heat discharge hole 306 is lifted, its position is exactly opposite to the jet port of the refrigeration and heat dissipation mechanism. Therefore, the cold air generated by the refrigeration and heat dissipation mechanism can quickly blow into the fixed cylinder 301 and then flow into the actuator body 1 for cooling.

[0037] In summary, when the present utility model is in use, when the temperature inside the actuator body 1 is too high, the air flow inside the actuator body 1 enters the fixed cylinder 301 through the air inlet hole 302 and contacts the thermal expansion airbag 303. The heat transfer plate 304 is made of a heat-conducting material. Therefore, the hot air can also quickly transfer heat to the thermal expansion airbag 303 through the heat transfer plate 304. The thermal expansion airbag 303 will continuously and rapidly expand as the temperature inside the actuator body 1 rises. Since the position of the heat transfer plate 304 is fixed, the connecting frame 307 can be driven to continuously rise after expansion, and thus the sealing member 305 can be driven to rise through the first fixing rod 308. When the sealing member 305 rises, the pressure relief and heat discharge hole 306 will be exposed. Thus, the high-pressure hot air flow inside the actuator body 1 can be discharged through the pressure relief and heat discharge hole 306. At the same time, when the temperature detector 405 detects that the temperature inside the actuator body 1 is too high, it will control the cooler 401 to turn on. After the cooler 401 generates cold air, the cold air flows into the flow dividing ring 403 through the connecting box 402, and the cold air inside the flow dividing ring 403 is then blown out through the air blowing pipe 406. After the pressure relief and heat discharge hole 306 is lifted, its position is exactly opposite to the air jet port of the refrigeration and heat dissipation mechanism. Therefore, the cold air generated by the refrigeration and heat dissipation mechanism can be quickly blown into the fixed cylinder 301 and then flow into the actuator body 1 for further cooling.

[0038] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited thereto. Various changes can be made without departing from the spirit of the present utility model within the scope of knowledge possessed by those skilled in the art to which the present utility model pertains.

Claims

1. An explosion-proof electric actuator, comprising an actuator body (1) and a base (2) arranged at the bottom of the actuator body (1); characterized in that: Also includes: A refrigeration and heat dissipation mechanism is arranged on the top of the actuator body (1) and is used to generate cold air and cool the actuator body (1); And a pressure relief and heat dissipation mechanism is arranged inside the actuator body (1) and is used to open the actuator body (1) for heat dissipation.

2. The explosion-proof electric actuator according to claim 1, characterized in that: The refrigeration and heat dissipation mechanism includes a temperature detector (405) and an injection assembly; The temperature detector (405) is arranged at the bottom of the pressure relief and heat dissipation mechanism; The jet assembly is arranged on the top of the actuator body (1) and is used to generate cold air and jet it out to cool the actuator body (1).

3. The explosion-proof electric actuator according to claim 2, characterized in that: The jet assembly includes a refrigerator (401), a connection box (402), a splitter ring (403), a second fixing rod (404) and a blow pipe (406); The second fixing rod (404) is arranged at the top of the actuator body (1), the diverter ring (403) is arranged at the top of the second fixing rod (404), the connecting box (402) is arranged at the top of the diverter ring (403), the refrigerator (401) is arranged at the top of the connecting box (402), and the blowing pipe (406) is arranged on the inner side of the diverter ring (403).

4. The explosion-proof electric actuator according to claim 1, characterized in that: The pressure relief and heat dissipation mechanism comprises a fixing cylinder (301), a power component and a heat dissipation component; The fixing cylinder (301) is arranged inside the actuator body (1); The power component is arranged inside the fixing cylinder (301) and located at the lower part, and is used to provide power for the heat dissipation component; The heat dissipation component is arranged inside the fixing cylinder (301) and located at the upper part, and is used to open the actuator body (1) to dissipate heat therefrom.

5. The explosion-proof electric actuator according to claim 4, characterized in that: The power assembly includes a thermal expansion airbag (303), a heat transfer plate (304), an air inlet (302) and a connecting frame (307); The air inlet (302) is arranged on the fixed cylinder (301), the heat transfer plate (304) is arranged at the bottom of the fixed cylinder (301), the heat expansion airbag (303) is arranged at the top of the heat transfer plate (304), and the connecting frame (307) is arranged at the top of the heat expansion airbag (303).

6. The explosion-proof electric actuator according to claim 5, characterized in that: The heat dissipation assembly comprises a straight slide rail (309), a fixing rod (308), a sealing member (305) and a pressure relief and heat dissipation hole (306); The straight slide rail (309) is slidably arranged on the side of the connecting frame (307), and the side of the straight slide rail (309) close to the fixed cylinder (301) is connected to the inner side of the fixed cylinder (301), the fixed rod (308) is arranged on the top of the connecting frame (307), the sealing member (305) is arranged on the top of the fixed rod (308), and the pressure relief and heat dissipation hole (306) is arranged on the side of the sealing member (305).

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