CN218733575U - Explosion-proof motor - Google Patents
Explosion-proof motor Download PDFInfo
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- CN218733575U CN218733575U CN202222738598.7U CN202222738598U CN218733575U CN 218733575 U CN218733575 U CN 218733575U CN 202222738598 U CN202222738598 U CN 202222738598U CN 218733575 U CN218733575 U CN 218733575U
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Abstract
The application discloses explosion-proof motor for solve the lower technical problem of motor explosion-proof performance. Dry air or inert gas is input into an inner cavity of the motor through a ventilation device, and combustible gas in the inner cavity of the motor is diluted and replaced, so that the starting safety of the motor is ensured; and compensate motor inner chamber pressure to keep motor inner chamber pressure to be higher than external atmospheric pressure all the time, prevent that explosion type mist from getting into the motor inner chamber, ensure motor safe operation.
Description
Technical Field
The application relates to the technical field of motors, in particular to an explosion-proof motor.
Background
Explosive mixed gas is easy to remain in working environments of coal, steel, petroleum, chemical engineering and the like. In these application scenarios, the explosive mixture gas can easily enter the inner cavity of the motor. Once the motor generates sparks, electric arcs or high temperature discharge, explosion accidents can be caused, and great safety risks are brought.
Therefore, it is necessary to provide a new explosion-proof motor to solve the technical problem of low explosion-proof performance of the motor.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a novel explosion-proof motor for solve the technical problem that the explosion-proof performance of the motor is lower.
Specifically, an explosion proof machine includes:
a motor body;
the motor body is provided with a motor inner cavity;
the ventilation device is connected with the inner cavity of the motor and is used for inputting gas into the inner cavity of the motor;
the ventilation device at least comprises:
the main control valve is connected with the inner cavity of the motor and is used for switching the gas of at least two different gas paths;
the purging gas circuit is connected with the main control valve;
the pressure compensation gas circuit is connected with the main control valve;
the logic module is used for controlling the main control valve to switch the purging gas circuit or the pressure compensation gas circuit according to the air pressure value of the inner cavity of the motor;
the logic module is provided with a plurality of component ports, and the component ports are respectively connected with the motor inner cavity, the main control valve, the purging gas circuit and the pressure compensation gas circuit.
Further, the logic module comprises:
a logic valve group which is connected with the main control valve and consists of a plurality of two-position three-way valves;
the pressure sensor is arranged in the inner cavity of the motor and connected with the logic valve bank;
and the timer is connected with the logic valve group.
Further, the purge gas path at least includes:
and the purging main gas circuit pipeline is sequentially connected with the main control valve, the first normally open logic valve in the logic valve group and the gas source.
Further, the explosion-proof motor still includes:
the pressure release valve is connected with the inner cavity of the motor;
the purging valve is arranged in the pressure release valve;
the purge gas path further includes:
and the positive pressure purging gas circuit pipeline is sequentially connected with a purging valve, a pressure release valve, a second normally open logic valve in the logic valve group, a third normally closed logic valve in the logic valve group and a gas source.
Further, logic module is according to motor cavity atmospheric pressure value, and control main control valve switches and sweeps the gas circuit, specifically includes:
gas is input from a gas source, flows to the main control valve from the first normally open logic valve through the purging main gas circuit pipeline and enters the motor;
the pressure sensor acquires the air pressure value of the inner cavity of the motor, and when the air pressure value of the inner cavity of the motor meets a preset positive pressure purging threshold value, the third normally-closed logic valve is activated to be opened;
and gas is input from a gas source, flows through the positive pressure purging gas circuit pipeline, flows through the opened third normally closed logic valve, the second normally open logic valve, the pressure release valve and the purging valve, and enters the interior of the motor.
Further, the pressure compensation gas circuit at least comprises:
and the pressure compensation gas circuit pipeline is sequentially connected with the main control valve, a first normally open logic valve in the logic valve group, a fourth normally closed logic valve in the logic valve group, the timer, a fifth normally closed logic valve in the logic valve group and the gas source.
Further, the logic module controls the main control valve to switch the pressure compensation gas circuit according to the air pressure value of the inner cavity of the motor, and the logic module specifically comprises:
the pressure sensor acquires the air pressure value of the inner cavity of the motor, and when the air pressure value of the inner cavity of the motor meets a preset pressure compensation threshold value, the fifth normally-closed logic valve is activated to be opened;
gas is input from a gas source, flows through a pressure compensation gas circuit pipeline and flows through a fifth normally-closed logic valve and a timer which are opened;
the timer starts to time until the gas inflow time meets the preset time, and the fourth normally-closed logic valve is activated to be opened;
the gas flows through the opened fourth normally-closed logic valve and the opened first normally-open logic valve, so that the first normally-open logic valve is closed;
the first normally open logic valve closes such that the main control valve closes.
Further, the ventilation device further includes:
and the alarm gas circuit pipeline is sequentially connected with the alarm limit switch, a sixth normally closed logic valve in the logic valve group and a gas source and is used for alarming the air pressure in the inner cavity of the motor.
Further, alarm gas circuit pipeline is used for alarm motor inner chamber atmospheric pressure, specifically includes:
the pressure sensor acquires the air pressure value of the inner cavity of the motor, and when the air pressure of the inner cavity of the motor is lower than a preset safety pressure threshold value, the sixth normally-closed logic valve is activated to be opened;
and gas is input from a gas source, flows through the alarm gas circuit pipeline and the opened sixth normally closed logic valve, and pushes the alarm limit switch to send out an alarm.
Further, the gas source at least comprises a filtering pressure regulator;
the gas is at least one of dry air or inert gas.
The technical scheme provided by the embodiment of the application at least has the following beneficial effects:
dry air or inert gas is input into the inner cavity of the motor through a ventilation device, and combustible gas in the inner cavity of the motor is diluted and replaced, so that the starting safety of the motor is ensured; and compensate motor inner chamber pressure to keep motor inner chamber pressure to be higher than external atmospheric pressure all the time, prevent that explosion type mist from getting into the motor inner chamber, ensure motor safe operation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of an explosion-proof motor according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a logic module according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a ventilation device according to an embodiment of the present application.
The reference numbers in the figures denote:
100. explosion-proof motor
11. Inner cavity of motor
12. Ventilation device
121. Master control valve
122. Logic module
1221. Logic valve group
1222. Pressure sensor
1223. Time-meter
13. Pressure relief valve
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that explosive mixed gas (i.e., flammable gas) is likely to remain in working environments such as coal, steel, petroleum, chemical engineering, and the like. In these application scenarios, the explosive mixture gas can easily enter the inner cavity of the motor. Once the motor generates sparks, electric arcs or high temperature discharge, explosion accidents can be caused, and great safety risks are brought.
Referring to fig. 1 to 3, in order to solve the technical problem of low explosion-proof performance of the motor, the present application provides an explosion-proof motor 100, including:
a motor body;
the motor body is provided with a motor inner cavity 11;
the ventilation device 12 is connected with the motor inner cavity 11 and is used for inputting gas into the motor inner cavity 11;
the ventilation device 12 comprises at least:
the main control valve 121 is connected with the inner cavity 11 of the motor and is used for switching gas of at least two different gas paths;
a purge gas path connected to the main control valve 121;
a pressure compensation gas circuit connected to the main control valve 121;
a logic module 122 for controlling the main control valve 121 to switch the purging gas circuit or the pressure compensation gas circuit according to the air pressure value in the inner cavity of the motor;
the logic module 122 has a plurality of component ports, and the component ports are respectively connected to the motor inner cavity 11, the main control valve 121, the purge gas circuit, and the pressure compensation gas circuit.
It will be appreciated that the ventilation means 12 is used to introduce gas into the motor chamber 11 to dilute or replace the explosive mixture, reducing the likelihood of an explosion event being initiated by the motor. Therefore, the gas should be a non-combustible gas, such as clean, oil-free dry air or an inert gas. In a preferred embodiment provided herein, the gas is at least one of dry air or an inert gas. The gas source for providing gas comprises at least a filter pressure regulator.
Further, the ventilation device 12 includes at least:
the main control valve 121 is connected with the inner cavity 11 of the motor and is used for switching gas of at least two different gas paths;
a purge gas path connected to the main control valve 121;
a pressure compensation gas circuit connected to the main control valve 121;
a logic module 122 for controlling the main control valve 121 to switch the purging gas circuit or the pressure compensation gas circuit according to the air pressure value in the inner cavity of the motor;
the logic module 122 has a plurality of component ports, and the component ports are respectively connected to the motor inner cavity 11, the main control valve 121, the purge gas circuit, and the pressure compensation gas circuit.
Usually, the main control valve 121 is a two-position three-way valve, and the main control valve 121 is connected to the motor cavity 11 and can input two different gas paths to the motor cavity 11. Specifically, the two different gas paths may be represented as a purge gas path connected to the main control valve 121 and a pressure compensation gas path connected to the main control valve 121. Two different gas paths can be generated, so that the problem that explosion type mixed gas is easily accumulated in the inner cavity 11 of the motor before the motor is started is considered; when the motor is started, the spark and the electric arc generated by the motor can cause explosion accidents; after the motor is started, the explosive mixed gas still possibly enters the motor inner cavity 11, and at the moment, the motor inner cavity 11 is high in temperature and still possibly causes explosion accidents. Therefore, only before the motor is started, gas is input into the motor inner cavity 11 to dilute or replace the explosion-type mixed gas, the explosion-proof performance of the motor is still low, and the pressure of the motor inner cavity 11 needs to be compensated to keep the pressure of the motor inner cavity 11 higher than the external atmospheric pressure all the time, so that the explosion-type mixed gas is prevented from entering the motor inner cavity 11, and the safe operation of the motor is ensured.
The gas circuit that this application will input gas to motor inner chamber 11 before the motor starts is called to sweep the gas circuit, will be called the pressure compensation gas circuit to the gas circuit of motor inner chamber 11 input gas after the motor starts.
Of course, if the condition that the main control valve 121 switches the purge gas path or the pressure compensation gas path is only started according to whether the motor is powered on, the situation that the explosive mixed gas in the motor cavity 11 is diluted or not completely replaced easily occurs. If the explosion-type mixed gas still remains in the motor cavity 11, the explosion-proof performance of the motor is low. Therefore, in a preferred embodiment provided by the present application, the ventilation device 12 further includes a logic module 122 for controlling the main control valve 121 to switch the purge circuit or the pressure compensation circuit according to the air pressure value in the cavity of the motor. The logic module 122 has a plurality of component ports, and the component ports are respectively connected to the motor inner cavity 11, the main control valve 121, the purge gas circuit, and the pressure compensation gas circuit.
It can be understood that the air pressure value in the motor cavity can intuitively reflect the dilution or replacement of the explosive mixed gas in the motor cavity 11. The logic module 122 is preferably adopted to detect the air pressure value of the inner cavity of the motor, and when the air pressure value of the inner cavity of the motor meets the preset pressure compensation threshold, the switching condition is met; the logic module 122 controls the main control valve 121 to switch the pressure compensation gas circuit.
Specifically, the logic module 122 includes:
a logic valve group 1221 which is connected with the main control valve 121 and consists of a plurality of two-position three-way valves;
the pressure sensor 1222 is arranged in the motor cavity 11 and connected with the logic valve set 1221;
a timer 1223 connected to the logic valve block 1221.
In other words, the logic valve block 1221, the pressure sensor 1222, and the timer 1223 are several component ports of the logic module 122. The logic valve set 1221 is composed of a plurality of two-position three-way valves, and for simplicity of description, any two-position three-way valve in the logic valve set 1221 is referred to as a logic valve and is labeled with a serial number. The logic valve is connected with the gas circuit pipeline and used for switching the gas circuit. The pressure sensor 1222 is used for acquiring the air pressure value of the motor cavity 11. Timer 1223 is used to record the length of time that gas is input.
The specific implementation scheme of the purging gas circuit is described firstly as follows:
further, the purge gas path at least includes:
and the purging main gas circuit pipeline is sequentially connected with the main control valve 121, the first normally open logic valve in the logic valve group 1221 and the gas source.
As will be understood by those skilled in the art, the dilution of the explosive mixture in the motor cavity 11 can be accomplished by inputting gas from a gas source, flowing from the first normally open logic valve to the main control valve 121 through the purging main gas path pipe, and entering the interior of the motor.
However, the dilution efficiency of the purging main gas path pipeline on the explosive mixed gas in the motor inner cavity 11 is low, or effective replacement is difficult to realize. In order to further improve the explosion-proof performance of the motor, in another specific embodiment provided by the present application, the explosion-proof motor further includes:
a pressure release valve 13 connected with the motor inner cavity 11;
a purge valve provided in the relief valve 13;
the purge gas path further includes:
and the positive pressure purging gas path pipeline is sequentially connected with a purging valve, the pressure release valve 13, a second normally open logic valve in the logic valve group 1221, a third normally closed logic valve in the logic valve group 1221 and a gas source.
Further, the logic module 122 controls the main control valve 121 to switch the purging gas circuit according to the air pressure value of the inner cavity of the motor, and specifically includes:
gas is input from a gas source, flows to the main control valve 121 from the first normally open logic valve through the purging main gas circuit pipeline, and enters the motor;
the pressure sensor 1222 obtains the air pressure value of the inner cavity of the motor, and when the air pressure value of the inner cavity of the motor meets a preset positive pressure purging threshold value, the third normally closed logic valve is activated to be opened;
gas is input from a gas source, flows through the positive pressure purging gas circuit pipeline, flows through the opened third normally closed logic valve, the second normally open logic valve, the pressure release valve 13 and the purging valve, and enters the interior of the motor.
It is directly perceived, and the positive pressure sweeps the gas circuit pipeline and can improve dilution efficiency or realize effectively replacing the explosion type mist in motor inner chamber 11.
The following introduces a specific implementation scheme of the pressure compensation gas circuit:
further, the pressure compensation gas circuit at least comprises:
and the pressure compensation air path pipeline is sequentially connected with the main control valve 121, a first normally open logic valve in the logic valve bank 1221, a fourth normally closed logic valve in the logic valve bank 1221, a timer 1223, a fifth normally closed logic valve in the logic valve bank 1221 and an air source.
Then, the logic module 122 controls the main control valve 121 to switch the pressure compensation air circuit according to the air pressure value of the inner cavity of the motor, and specifically includes:
the pressure sensor 1222 acquires the air pressure value of the inner cavity of the motor, and when the air pressure value of the inner cavity of the motor meets a preset pressure compensation threshold value, the fifth normally-closed logic valve is activated to be opened;
gas is input from a gas source, flows through the pressure compensation gas circuit pipeline and flows through the opened fifth normally-closed logic valve and the timer 1223;
the timer 1223 starts to time until the gas inflow time meets the preset time, and activates the fourth normally-closed logic valve to open;
the gas flows through the opened fourth normally-closed logic valve and the opened first normally-open logic valve, so that the first normally-open logic valve is closed;
the first normally open logic valve closes, causing the main control valve 121 to close.
Of course, it is considered that in the event of air supply failure, the air supply pressure is lower, which will cause the pressure in the motor cavity 11 to be lost, and the leakage compensation cannot be performed normally. In order to ensure the safe operation of the motor, in another embodiment provided in the present application, the ventilation device 12 further includes:
and an alarm gas pipeline sequentially connected with the alarm limit switch, a sixth normally closed logic valve in the logic valve group 1221 and a gas source and used for alarming the gas pressure in the motor inner cavity 11.
Further, the warning gas circuit pipeline is used for 11 atmospheric pressures in warning motor inner chamber, specifically includes:
the pressure sensor 1222 obtains the air pressure value of the inner cavity of the motor, and when the air pressure of the inner cavity 11 of the motor is lower than a preset safety pressure threshold value, the sixth normally-closed logic valve is activated to be opened;
and gas is input from a gas source, flows through the alarm gas circuit pipeline and the opened sixth normally closed logic valve, and pushes the alarm limit switch to send out an alarm.
Further, in one implementation provided herein, the vent 12 is pre-set with a purge pressure, an alarm pressure, a trip pressure, and a leakage compensation pressure. These pressures are different, such as 360pa of pressure relief outlet purge pressure, and the control timer 1223 is started. And in the pressure maintaining process, when the pressure in the cavity is reduced to 450pa, an alarm signal is sent out, and when the pressure is reduced to 260pa, a trip signal is sent out.
In practice, the ventilation device 12 is also provided with a plurality of pressure sensors, such as a minimum pressure sensor, an alarm pressure sensor, a purge flow sensor. For example, there are 6 two-position three-way valves in the logic valve set 1221 of the ventilation device 12. The air sources of the first normally open logic valve, the third normally closed logic valve, the fifth normally closed logic valve and the sixth normally closed logic valve are all from the filtering pressure regulator, and the air sources of the second normally open logic valve and the fourth normally closed logic valve are all from the output end of the third normally closed logic valve.
In order to visually judge the conduction state of the gas path pipeline, the ventilation device 12 is also provided with a plurality of pneumatic indicator lamps. Such as a minimum pressure pneumatic indicator light, a purge timing indicator light, a positive pressure pneumatic indicator light.
After the ventilation device 12 is ventilated, the first normally open logic valve is opened, and the gas flows to the main control valve 121. The purging main gas circuit is communicated with the pipeline, gas enters the motor, and the internal pressure of the motor rises.
The inner cavity 11 of the motor gradually rises, and when the air pressure value of the inner cavity of the motor meets a preset purging threshold value, the minimum pressure sensor controls the third normally-closed logic valve to be opened. The gas flows to the limit switch of the third normally closed logic valve to realize node switching. Meanwhile, the gas flows to the minimum pressure pneumatic indicator lamp, and the minimum pressure pneumatic indicator lamp is changed from red to green. Simultaneously, gas also flows to a second normally open logic valve and a fourth normally closed logic valve.
The second normally open logic valve opens and gas flows to the cylinder of the pressure relief valve 13. The cylinder acts to open the purge valve and the ventilation unit 12 enters a purge state.
After the purge valve is opened, the purge pressure sensor monitors the purge pressure. When the blowing pressure reaches a set value, the fifth normally-closed logic valve is controlled to be opened, the gas flows to the blowing timing indicator lamp, and the blowing timing indicator lamp is changed from red to green. The gas flows to the timer 1223 at the same time, and the timer 1223 starts counting.
When the set time is reached, the timer 1223 is activated to control the fourth normally-closed logic valve to open. The gas flow through the fourth normally closed logic valve into the first normally open logic valve, which controls the first normally open logic valve to close, such that the main control valve 121 closes and the ventilation device 12 enters a leakage compensated state.
Gas flows from the fourth normally closed logic valve to the input end of the OR valve, and is self-maintained; gas flows from the fourth normally closed logic valve to the positive pressure limit switch (node switch). The gas flows to the positive pressure pneumatic indicator light at the same time, and the positive pressure pneumatic indicator light turns green from red.
When the purge pressure sensor is released, the fifth normally closed logic valve closes and the purge timing indicator changes from green to red.
The alarm pressure sensor monitors the internal pressure of the motor, and when the pressure is lower than a set value, the sixth normally-closed logic valve is controlled to be opened, and the gas flows to the alarm limit switch (node switching).
The main gas source pressure is usually set to 0.5 to 1.0 (MPa); the logic control unit sets the pressure to be 0.30 (MPa); the minimum pressure sensor 1222 sets the pressure to 150-300 (Pa); the alarm pressure sensor 1222 sets the pressure to 300-450 (Pa); the pressure of the purge flow sensor is set to be 300-450 (Pa); the set pressure of the intermediate sensor is 800-1100 (Pa); the relief valve 13 sets a pressure of 3000 to 3500 (Pa).
In summary, in the explosion-proof motor 100 provided by the present application, dry air or inert gas is input into the motor inner cavity 11 through the ventilation device 12, so as to dilute and replace the combustible gas in the motor inner cavity 11, thereby ensuring the starting safety of the motor; and compensate motor inner chamber 11 pressure to keep motor inner chamber 11 pressure to be higher than external atmospheric pressure all the time, prevent that explosion type mist from getting into motor inner chamber 11, ensure motor safe operation.
It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the statements "comprising one of 8230 \8230;" 8230; "defining elements does not exclude the presence of additional like elements in the process, method, article, or apparatus that comprises said elements.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. An explosion-proof electric machine, comprising:
a motor body;
the motor body is provided with a motor inner cavity;
the ventilation device is connected with the inner cavity of the motor and is used for inputting gas into the inner cavity of the motor;
the ventilation device at least comprises:
the main control valve is connected with the inner cavity of the motor and is used for switching the gases of at least two different gas paths;
the purging gas circuit is connected with the main control valve;
the pressure compensation gas circuit is connected with the main control valve;
the logic module is used for controlling the main control valve to switch the purging gas circuit or the pressure compensation gas circuit according to the air pressure value of the inner cavity of the motor;
the logic module is provided with a plurality of component ports which are respectively connected with the motor inner cavity, the main control valve, the purging gas circuit and the pressure compensation gas circuit.
2. The explosion-proof motor of claim 1, wherein the logic module comprises:
a logic valve group which is connected with the main control valve and consists of a plurality of two-position three-way valves;
the pressure sensor is arranged in the inner cavity of the motor and connected with the logic valve bank;
and the timer is connected with the logic valve group.
3. The explosion-proof motor of claim 2, wherein said purge gas circuit comprises at least:
and the purging main gas circuit pipeline is sequentially connected with the main control valve, a first normally open logic valve in the logic valve group and a gas source.
4. The explosion-proof motor of claim 3, further comprising:
the pressure release valve is connected with the inner cavity of the motor;
the purging valve is arranged in the pressure release valve;
the purge gas path further includes:
and the positive pressure purging gas circuit pipeline is sequentially connected with a purging valve, a pressure relief valve, a second normally open logic valve in the logic valve group, a third normally closed logic valve in the logic valve group and a gas source.
5. The explosion-proof motor of claim 4, wherein the logic module controls the main control valve to switch the purging gas circuit according to the air pressure value in the inner cavity of the motor, and specifically comprises:
gas is input from a gas source, flows to the main control valve from the first normally open logic valve through the purging main gas circuit pipeline and enters the motor;
the pressure sensor acquires the air pressure value of the inner cavity of the motor, and when the air pressure value of the inner cavity of the motor meets a preset positive pressure purging threshold value, the third normally-closed logic valve is activated to be opened;
and gas is input from a gas source, flows through the positive pressure purging gas circuit pipeline, flows through the opened third normally closed logic valve, the second normally open logic valve, the pressure release valve and the purging valve, and enters the interior of the motor.
6. The explosion-proof motor of claim 5, wherein said pressure compensation circuit comprises at least:
and the pressure compensation gas circuit pipeline is sequentially connected with the main control valve, a first normally open logic valve in the logic valve group, a fourth normally closed logic valve in the logic valve group, the timer, a fifth normally closed logic valve in the logic valve group and the gas source.
7. The explosion-proof motor of claim 6, wherein the logic module controls the main control valve to switch the pressure compensation gas circuit according to the air pressure value in the motor cavity, and specifically comprises:
the pressure sensor acquires the air pressure value of the inner cavity of the motor, and when the air pressure value of the inner cavity of the motor meets a preset pressure compensation threshold value, the fifth normally-closed logic valve is activated to be opened;
gas is input from a gas source, flows through a pressure compensation gas circuit pipeline and flows through a fifth normally-closed logic valve and a timer which are opened;
starting timing by a timer until the gas inflow time meets the preset time, and activating a fourth normally-closed logic valve to open;
the gas flows through the opened fourth normally-closed logic valve and the opened first normally-open logic valve, so that the first normally-open logic valve is closed;
the first normally open logic valve closes such that the main control valve closes.
8. The explosion-proof motor of claim 7, wherein said ventilation means further comprises:
and the alarm gas circuit pipeline is sequentially connected with the alarm limit switch, a sixth normally closed logic valve in the logic valve group and a gas source and is used for alarming the air pressure in the inner cavity of the motor.
9. The explosion-proof motor of claim 8, wherein the alarm gas path conduit is used for alarming the air pressure in the motor cavity, and specifically comprises:
the pressure sensor acquires the air pressure value of the inner cavity of the motor, and when the air pressure of the inner cavity of the motor is lower than a preset safe pressure threshold value, the sixth normally-closed logic valve is activated to be opened;
and gas is input from a gas source, flows through the alarm gas circuit pipeline and the opened sixth normally closed logic valve, and pushes the alarm limit switch to send out an alarm.
10. The explosion-proof motor of claim 3 wherein said gas source includes at least a filtered pressure regulator;
the gas is at least one of dry air or inert gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222738598.7U CN218733575U (en) | 2022-10-18 | 2022-10-18 | Explosion-proof motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222738598.7U CN218733575U (en) | 2022-10-18 | 2022-10-18 | Explosion-proof motor |
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| CN218733575U true CN218733575U (en) | 2023-03-24 |
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| CN202222738598.7U Active CN218733575U (en) | 2022-10-18 | 2022-10-18 | Explosion-proof motor |
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