CN218787859U - Liquid level alarm device for water resistance cabinet - Google Patents
Liquid level alarm device for water resistance cabinet Download PDFInfo
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- CN218787859U CN218787859U CN202223218560.3U CN202223218560U CN218787859U CN 218787859 U CN218787859 U CN 218787859U CN 202223218560 U CN202223218560 U CN 202223218560U CN 218787859 U CN218787859 U CN 218787859U
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Abstract
The utility model provides a liquid level alarm device for a water resistance cabinet, which comprises a power supply, a non-contact liquid level sensor, a relay and an alarm lamp, wherein the L line of the power supply is connected with the non-contact liquid level sensor; the non-contact liquid level sensor is arranged on the outer wall of the water tank of the water resistance cabinet and used for detecting the liquid level height in the water tank and generating a detection signal; the two ends of the relay are respectively connected with the non-contact liquid level sensor and the alarm lamp, and the relay is used for controlling the working state of the alarm lamp according to the detection signal; the alarm lamp is connected with the N line of the power supply. The utility model provides a non-contact level sensor installs on the outer wall of water tank, even hinder the cabinet during operation at water, also can be right liquid level alarm device overhauls, prevents that its trouble from nevertheless not being perceived and leading to water to hinder cabinet equipment and damage or induce the production accident.
Description
Technical Field
The utility model belongs to the technical field of water resistance cabinet equipment technique and specifically relates to a liquid level alarm device for water resistance cabinet is related to.
Background
The water resistance cabinet is a voltage reduction starting device for starting a high-power motor, and has the advantages of small starting current, stable starting and small impact on a power grid because the starting current of the water resistance cabinet can reach 7-8 times of the rated current of the motor when the motor is directly started, and the starting current of the water resistance cabinet is generally 2.5-3.5 times of the rated current of the motor. The water resistance cabinet main body comprises a plurality of independent water tanks, when sufficient water exists in the water tanks, the water resistance cabinet can normally operate, the existing device for detecting the liquid level in the water tank of the water resistance cabinet is a floating ball liquid level alarm device, after a floating ball reaches a minimum line along with the water level in the water tank, the floating ball liquid level alarm device gives an alarm, and after the alarm, the equipment is not allowed to be started. This alarm device's partial structure sets up inside the water tank, during water resistance cabinet normal operating, can't overhaul this alarm device, if this alarm device breaks down and can not in time discover at water resistance cabinet operation in-process, can seriously influence the life of equipment, still can cause the production accident when serious.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the not enough that above-mentioned background art exists, provide a liquid level alarm device for water resistance cabinet.
The utility model adopts the technical proposal that: a liquid level alarm device for a water resistance cabinet comprises a power supply, a non-contact liquid level sensor, a relay and an alarm lamp, wherein an L line of the power supply is connected with the non-contact liquid level sensor; the non-contact liquid level sensor is arranged on the outer wall of the water tank of the water resistance cabinet and used for detecting the liquid level height in the water tank and generating a detection signal; the two ends of the relay are respectively connected with the non-contact liquid level sensor and the alarm lamp, and the relay is used for controlling the working state of the alarm lamp according to the detection signal; the alarm lamp is connected with the N line of the power supply.
Specifically, the non-contact liquid level sensor is a capacitive liquid level sensor, the capacitive liquid level sensor comprises a first normally open switch, and the first normally open switch is connected with the power supply and the relay.
Specifically, the relay includes first relay, first relay includes that first coil and second normally open the switch, the second normally opens the both ends of switch and connects respectively first coil with the alarm lamp.
Specifically, the liquid level alarm device further comprises a start-stop button, and the start-stop button is connected with the first relay and the alarm lamp in parallel.
Specifically, the relay comprises a second relay, and the second relay comprises a second coil and a single-pole double-throw switch; a common contact of the single-pole double-throw switch is connected with the first normally open switch, and a normally closed contact is connected with the first coil; one end of the second coil is connected with a normally open contact of the single-pole double-throw switch and the start-stop button, and the other end of the second coil is connected with the N line of the power supply.
Specifically, the liquid level alarm device further comprises a PLC and a remote alarm terminal which are connected through an Ethernet, the signal output end of the second normally-open switch is connected with the digital quantity input module of the PLC, and the remote alarm terminal receives a control signal sent by the PLC and then conducts remote alarm.
The utility model has the advantages that: the non-contact liquid level sensor is arranged on the outer wall of the water tank, and the liquid level alarm device can be overhauled even when the water resistance cabinet works, so that the water resistance cabinet equipment is prevented from being damaged or production accidents are caused due to the fact that faults of the liquid level alarm device are not perceived.
Drawings
Fig. 1 is a block diagram of a system architecture according to an embodiment of the present invention;
fig. 2 is a schematic wiring diagram of an embodiment of the present invention.
In the figure:
10. a power source; 20. a non-contact liquid level sensor; 21. a first normally open switch; 30. a first relay; 31. a first coil; 32. a second normally open switch; 40. a second relay; 41. a second coil; 42. a single pole double throw switch; 50. an alarm lamp; 60. a start-stop button; 70. a PLC; 80. remote alarm terminal.
Detailed Description
The technical solutions of the embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.
Referring to fig. 1-2, a liquid level alarm device for a water resistance cabinet comprises a power supply 10, a non-contact liquid level sensor 20, a relay, a start-stop button 60 and an alarm lamp 50, wherein an L line of the power supply 10 is connected with the non-contact liquid level sensor 20; the non-contact liquid level sensor 20 is arranged on the outer wall of the water tank of the water resistance cabinet and used for detecting the liquid level height in the water tank and generating a detection signal; the two ends of the relay are respectively connected with the non-contact liquid level sensor 20 and the alarm lamp 50, the relay is also connected with a start-stop button 60, the detection signal and the start-stop button 60 control the working state of the relay, and the relay controls the working state of the alarm lamp 50; the alarm lamp 50 is connected to the N line of the power supply 10. The non-contact liquid level sensor 20 is arranged on the outer wall of the water tank, so that the liquid level alarm device can be overhauled even when the water resistance cabinet works, the damage of water resistance cabinet equipment or the production accident caused by the fact that the fault is not perceived is prevented, in addition, the non-contact liquid level sensor 20 is not in contact with the charged water in the water tank, and the electric shock risk of personnel during overhauling can be reduced.
The non-contact liquid level sensor 20 is a capacitive liquid level sensor, the capacitive liquid level sensor includes a first normally open switch 21, and two ends of the first normally open switch 21 are respectively connected to the power supply 10 and the relay. During specific implementation, the installation point of the capacitive liquid level sensor on the water tank is a water level alarm line, and when the liquid level in the water tank is lower than the capacitive liquid level sensor, the first normally-open switch 21 is closed. In different seasons, the installation point of the capacitive liquid level sensor can be changed at any time according to different evaporation rates of water, so that the water level alarm line can be adjusted, and the operation is convenient.
The relay includes a first relay 30 and a second relay 40, the first relay 30 includes a first coil 31 and a second normally open switch 32, and the second relay 40 includes a second coil 41 and a single-pole double-throw switch 42. A common contact of the single-pole double-throw switch 42 is connected with the first normally open switch 21, the normally closed contact is connected with the first coil 31, the normally open contact is connected with the second coil 41, and the other end of the second coil 41 is connected with the N line of the power supply 10; two ends of the second normally open switch 32 are respectively connected with the first coil 31 and the alarm lamp 50; the start-stop button 60 is electrically connected to the output end of the first normally open switch 21 and the input end of the second coil 41. When the liquid level in the water tank is lower than the non-contact liquid level sensor 20, the first normally-open switch 21 is closed, the first coil 31 is electrified, the second normally-open switch 32 is closed, and the alarm lamp 50 flickers; after seeing that the alarm lamp 50 flickers, the operator on duty presses the start-stop button 60, the second coil 41 is electrified, the normally open contact of the single-pole double-throw switch 42 is connected, the normally closed contact is broken, the first coil 31 is electrified, the second normally open switch 32 is disconnected, and the alarm lamp 50 is turned off; after water is supplemented, the liquid level in the water tank is higher than the non-contact liquid level sensor 20, the first normally-open switch 21 is switched off, the second coil 41 is powered off, the normally-open contact of the single-pole double-throw switch 42 is switched off, the normally-closed contact is switched on, and the whole liquid level alarm device is restored to the initial state. Wherein, for convenient operation, start-stop button 60 can select the contactor.
In some preferred embodiments, the liquid level alarm device further comprises a PLC70 and a remote alarm terminal 80 connected through an ethernet, a signal output end of the second normally open switch 32 is connected to a digital input module of the PLC70, and the remote alarm terminal 80 receives a control signal sent by the PLC70 and then performs remote alarm. When the liquid level in the water tank is lower than the non-contact liquid level sensor 20, the first normally-open switch 21 is closed, the first coil 31 is electrified, the second normally-open switch 32 is closed, the alarm lamp 50 flickers, meanwhile, the PLC70 transmits a control signal to the remote alarm terminal 80 after receiving a digital signal of the second normally-open switch 32, the remote alarm terminal 80 goes up a display device fault, and therefore an operator on duty can monitor the device condition in real time in a duty room.
The utility model provides a non-contact level sensor 20 installs on the outer wall of water tank, even hinder the cabinet during operation at water, also right liquid level alarm device overhauls, prevents that its trouble from nevertheless not being noticed and leading to water to hinder cabinet equipment and damage or bring out the production accident.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The utility model provides a liquid level alarm device for water-stop cabinet, includes power, non-contact level sensor, relay and alarm lamp, its characterized in that: the L line of the power supply is connected with the non-contact liquid level sensor; the non-contact liquid level sensor is arranged on the outer wall of the water tank of the water resistance cabinet and used for detecting the liquid level height in the water tank and generating a detection signal; the two ends of the relay are respectively connected with the non-contact liquid level sensor and the alarm lamp, and the relay is used for controlling the working state of the alarm lamp according to the detection signal; the alarm lamp is connected with the N line of the power supply.
2. The liquid level alarm device for the water resistance cabinet as claimed in claim 1, wherein the non-contact liquid level sensor is a capacitive liquid level sensor, and the capacitive liquid level sensor comprises a first normally open switch, and the first normally open switch is connected with the power supply and the relay.
3. The liquid level alarm device for the water resistance cabinet as claimed in claim 2, wherein the relay comprises a first relay, the first relay comprises a first coil and a second normally open switch, and two ends of the second normally open switch are respectively connected with the first coil and the alarm lamp.
4. The liquid level alarm device for the water-resistance cabinet according to claim 3, further comprising a start-stop button, wherein the start-stop button is connected with the first relay and the alarm lamp in parallel.
5. The liquid level alarm device for the water resistance cabinet as claimed in claim 4, wherein the relay comprises a second relay, the second relay comprises a second coil and a single-pole double-throw switch; the common contact of the single-pole double-throw switch is connected with the first normally open switch, and the normally closed contact is connected with the first coil; one end of the second coil is connected with a normally open contact of the single-pole double-throw switch and the start-stop button, and the other end of the second coil is connected with the N line of the power supply.
6. The liquid level alarm device for the water resistance cabinet according to any one of claims 3 to 5, further comprising a PLC and a remote alarm terminal connected through Ethernet, wherein the signal output end of the second normally open switch is connected with a digital input module of the PLC, and the remote alarm terminal receives a control signal sent by the PLC and then carries out remote alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223218560.3U CN218787859U (en) | 2022-12-02 | 2022-12-02 | Liquid level alarm device for water resistance cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223218560.3U CN218787859U (en) | 2022-12-02 | 2022-12-02 | Liquid level alarm device for water resistance cabinet |
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| Publication Number | Publication Date |
|---|---|
| CN218787859U true CN218787859U (en) | 2023-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223218560.3U Active CN218787859U (en) | 2022-12-02 | 2022-12-02 | Liquid level alarm device for water resistance cabinet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116795032A (en) * | 2023-05-24 | 2023-09-22 | 北京城建智控科技股份有限公司 | Automatic monitoring system and method for civil air defense door |
-
2022
- 2022-12-02 CN CN202223218560.3U patent/CN218787859U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116795032A (en) * | 2023-05-24 | 2023-09-22 | 北京城建智控科技股份有限公司 | Automatic monitoring system and method for civil air defense door |
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