An automatic water supply control device

Abstract

The utility model relates to an automatic water supply control device, it includes: water pool, the depth of water pool is H, first liquid level switch sets up in water pool, and the height of distance water pool's bottom is L, second liquid level switch sets up in water pool, and the height of distance water pool's bottom is S, first relay, first liquid level switch's output end is connected with first relay's trigger input end, alarm device, second liquid level switch's output end is connected with alarm device, inlet pipe, one end is connected with water source, and the other end is led into water pool, electromagnetic control valve sets up on inlet pipe for controlling the on-off of water route in inlet pipe, the control end of electromagnetic control valve is connected with first relay's output end, wherein, 0.2H <= L <= 0.3H, 0.7H <= S <= 0.8H. The application can realize the water level monitoring for factory production water pool, and can realize automatic water supply, and work is safer and more reliable.

Description

Technical Field

[0001] This utility model relates to an automatic water supply control device. Background Technology

[0002] Many large manufacturing plants have dedicated production water tanks. These tanks are critical infrastructure for ensuring the stable and efficient operation of the production process, playing a vital role in raw material handling, process control, equipment maintenance, and environmental safety. Water level control within these tanks is crucial for ensuring stable production, equipment safety, and compliance with environmental standards. Currently, many companies either rely on manual inspections to open or close valves to control water levels, which increases labor costs; some use PLC controllers combined with level sensors, but the upgrade costs are high; or they use mechanical differential pressure devices in conjunction with valves, but these are difficult for operators to detect in time if they malfunction, leading to water waste or water shortages. Utility Model Content

[0003] One of the main objectives of this invention is to overcome at least one of the above-mentioned defects and to provide an automatic water supply control device that can monitor the water level of the factory production water tank and provide automatic water supply, making the operation safer and more reliable.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides an automatic water supply control device, which includes: A water tank, the depth of which is H; A first liquid level switch is installed inside the water tank at a height L from the bottom of the water tank. The second liquid level switch is installed inside the water tank at a height of S from the bottom of the water tank. The first relay, the output terminal of the first liquid level switch is connected to the trigger input terminal of the first relay; An alarm device is provided, wherein the output terminal of the second liquid level switch is connected to the alarm device. The water inlet pipe has one end connected to the water source and the other end connected to the water tank. An electromagnetic control valve is installed on the water inlet pipe to control the flow of water in the water inlet pipe. The control terminal of the electromagnetic control valve is connected to the output terminal of the first relay. Among them, 0.2H≤L≤0.3H, 0.7H≤S≤0.8H.

[0005] According to one embodiment of the present invention, the alarm device includes a buzzer and a second relay. The output terminal of the second liquid level switch is connected in series with the trigger input terminal of the second relay. The second relay controls the on / off state of the working circuit of the buzzer. After the second liquid level switch is turned on, it outputs a trigger signal to the second relay.

[0006] According to one embodiment of the present invention, the second liquid level switch is in a normally open state. When the water level in the pool rises to the position of the second liquid level switch, the second liquid level switch switches from the normally open state to the normally closed state. When the water level in the pool is higher than the position of the second liquid level switch, the second liquid level switch remains in the normally closed state.

[0007] According to one embodiment of the present invention, the first liquid level switch is in a normally closed state. When the water level in the pool drops to the position of the first liquid level switch, the first liquid level switch switches from a normally closed state to a normally open state. When the water level in the pool is lower than the position of the first liquid level switch, the first liquid level switch remains in a normally open state.

[0008] According to one embodiment of the present invention, both the first liquid level switch and the second liquid level switch are inductive float sensor switches.

[0009] According to one embodiment of the present invention, the first relay is a power-on delay relay.

[0010] According to one embodiment of the present invention, a manual control valve is also included, which is disposed on the water inlet pipe and is used to manually control the opening and closing of the water passage in the water inlet pipe.

[0011] Compared with the prior art, the advantages and beneficial effects of the automatic water supply control device of this utility model patent application are as follows: The automatic water supply control device of this application, through the setting of dual liquid level sensors at low and high levels, can realize the monitoring of high and low water levels in the factory production water tank, and can realize delayed automatic water supply when the water level is low, effectively avoiding frequent on and off of the liquid level switch, making the operation safer and more reliable, and can issue an alarm in time when the water supply fails, reminding personnel to intervene in time.

[0012] In addition, the automatic water supply control device of this application requires low investment costs and can be used to upgrade existing production water tanks, making it more adaptable and practical than existing equipment. Attached Figure Description

[0013] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 This is a schematic diagram of the structure of an automatic water supply control device according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the control circuit structure of an automatic water supply control device according to an embodiment of the present invention.

[0014] The annotations in the attached figures are explained as follows: 1. Pool; 2. First liquid level switch; 21. First relay; 3. Second liquid level switch: 4. Alarm device; 41. Second relay; 42. Buzzer; 5. Water inlet pipe; 61. Electromagnetic control valve; 62. Manual control valve. Detailed Implementation

[0015] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0017] In industrial production, water level control in production tanks is a crucial aspect of ensuring stable equipment operation. Traditional water level control devices often use a single level switch in conjunction with an electromagnetic control valve to achieve automatic water replenishment, but this approach has the following drawbacks: Low control precision: Setting only a single liquid level threshold makes the electromagnetic control valve prone to frequent opening and closing due to water level fluctuations, shortening the equipment lifespan. Lack of abnormal alarms: The inability to monitor and warn of excessively high water levels may lead to overflow accidents; Insufficient redundancy in manual control: There is a lack of backup control measures when the automatic control system fails, which affects the reliability of water supply.

[0018] This application describes an automatic water supply control device, such as... Figure 1 As shown, it includes: Water tank 1, wherein the depth of water tank 1 is H; The first liquid level switch 2 is installed inside the water tank 1, and the height from the bottom of the water tank 1 is L; The second liquid level switch 3 is installed inside the water tank 1, and the height from the bottom of the water tank 1 is S; The first relay 21, the output terminal of the first liquid level switch 2 is connected to the trigger input terminal of the first relay 21; Alarm device 4, the output terminal of the second liquid level switch 3 is connected to the alarm device 4; Water inlet pipe 5, one end is connected to a water source, and the other end is connected to the water tank 1; An electromagnetic control valve 61 is installed on the water inlet pipe 5 and is used to control the opening and closing of the water path in the water inlet pipe 5. The control terminal of the electromagnetic control valve 61 is connected to the output terminal of the first relay 21. The first liquid level switch 2 is normally closed. When the water level in the water tank 1 drops to the position of the first liquid level switch 2, the first liquid level switch 2 switches from normally closed to normally open. And when the water level in the water tank 1 is lower than the position of the first liquid level switch 2, the first liquid level switch 2 remains normally open. Among them, 0.2H≤L≤0.3H, 0.7H≤S≤0.8H.

[0019] Overall control circuit such as Figure 2 As shown, the alarm device 4 includes a buzzer 42 and a second relay 41. The output terminal of the second liquid level switch 3 is connected in series with the trigger input terminal of the second relay 41. The second relay 41 controls the on / off state of the working circuit of the buzzer 42. When the second liquid level switch 3 is turned on, it outputs a trigger signal to the second relay 41. The second liquid level switch 3 is in a normally open state. When the water level in the water tank 1 rises to the position of the second liquid level switch 3, the second liquid level switch 3 switches from the normally open state to the normally closed state. And when the water level in the water tank 1 is higher than the position of the second liquid level switch 3, the second liquid level switch 3 remains in the normally closed state.

[0020] In one embodiment, both the first liquid level switch 2 and the second liquid level switch 3 are inductive float sensor switches, and the first relay 21 is an energized delay relay.

[0021] In another embodiment, in order to enable manual intervention to shut off when necessary, the automatic water supply control device also includes a manual control valve 62, which is installed on the water inlet pipe 5 and is used to manually control the opening and closing of the water passage in the water inlet pipe 5.

[0022] Specifically, the automatic water supply control device in this embodiment generally includes: Pool 1: Depth H, used for storing liquid; First liquid level switch 2: installed in the water tank 1 at a height of L (0.2H≤L≤0.3H) from the bottom. Normally it is in the normally closed state, and switches to the normally open state when the water level is lower than L. Second liquid level switch 3: installed in water tank 1 at a height of S (0.7H≤S≤0.8H) from the bottom. Normally it is in the normally closed state, and switches to the normally closed state when the water level is higher than S. First relay 21: its input end is connected to the first liquid level switch 2, and its output end controls the solenoid control valve 61; Alarm device 4: includes a buzzer 42 and a second relay 41. The input terminal of the second relay 41 is connected to the second liquid level switch 3, and the output terminal controls the buzzer 42 circuit. Water inlet pipe 5: One end is connected to the water source, and the other end is connected to the water tank 1. An electromagnetic control valve 61 and a manual control valve 62 are installed on the pipe. Electromagnetic control valve 61: Its on / off state is controlled by the first relay 21 to achieve automatic water replenishment; Manual control valve 62: connected in parallel with solenoid control valve 61, used for manually opening and closing water inlet pipe 5.

[0023] The specific working principles under different working modes are as follows, roughly including the following three situations: Normal water replenishment mode: When the water level drops to L, the first liquid level switch 2 switches from normally closed to normally open, triggering the first relay 21 to conduct, and the solenoid control valve 61 opens to replenish water; when the water level rises back to above L, the first liquid level switch 2 returns to normally closed, and the solenoid control valve 61 closes.

[0024] Over-limit alarm mode: When the water level rises to S, the second liquid level switch 3 switches from normally open to normally closed, triggering the second relay 41 to conduct and the buzzer 42 to start the alarm.

[0025] Manual control mode: When the solenoid control valve 61 malfunctions or is under maintenance, the inlet pipe 5 can be directly controlled by the manual control valve 62.

[0026] Compared to existing technologies, it has the following advantages: Graded control improves accuracy: The dual threshold design of L (low water level) and S (high water level) avoids frequent opening and closing of the electromagnetic control valve 61, thus extending the equipment life. Over-limit alarm to prevent overflow: The second liquid level switch 3 monitors the water level above the limit and triggers an alarm to prevent overflow accidents; Manual redundancy ensures reliability: The manual control valve 62 is connected in parallel with the solenoid control valve 61 to realize automatic / manual dual-mode control and improve system fault tolerance; Simple structure and low cost: It uses common components such as float switches and relays, making it easy to modify existing equipment and promote its application.

[0027] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic water supply control device, characterized in that, include: A water tank, the depth of which is H; A first liquid level switch is installed inside the water tank at a height L from the bottom of the water tank. The second liquid level switch is installed inside the water tank at a height of S from the bottom of the water tank. The first relay, the output terminal of the first liquid level switch is connected to the trigger input terminal of the first relay; An alarm device is provided, wherein the output terminal of the second liquid level switch is connected to the alarm device. The water inlet pipe has one end connected to the water source and the other end connected to the water tank. An electromagnetic control valve is installed on the water inlet pipe to control the flow of water in the water inlet pipe. The control terminal of the electromagnetic control valve is connected to the output terminal of the first relay. Among them, 0.2H≤L≤0.3H, 0.7H≤S≤0.8H.

2. The automatic water supply control device according to claim 1, characterized in that, The alarm device includes a buzzer and a second relay. The output terminal of the second liquid level switch is connected in series with the trigger input terminal of the second relay. The second relay controls the on / off state of the working circuit of the buzzer. When the second liquid level switch is turned on, it outputs a trigger signal to the second relay.

3. The automatic water supply control device according to claim 2, characterized in that, The second liquid level switch is normally open. When the water level in the pool rises to the position of the second liquid level switch, the second liquid level switch switches from normally open to normally closed. When the water level in the pool is higher than the position of the second liquid level switch, the second liquid level switch remains normally closed.

4. The automatic water supply control device according to claim 1, characterized in that, The first liquid level switch is normally closed. When the water level in the pool drops to the position of the first liquid level switch, the first liquid level switch switches from normally closed to normally open. When the water level in the pool is lower than the position of the first liquid level switch, the first liquid level switch remains normally open.

5. The automatic water supply control device according to any one of claims 1 to 4, characterized in that, Both the first liquid level switch and the second liquid level switch use inductive float sensor switches.

6. The automatic water supply control device according to any one of claims 1 to 4, characterized in that, The first relay is a time-delay relay.

7. The automatic water supply control device according to claim 1, characterized in that, It also includes a manual control valve, which is installed on the water inlet pipe and is used to manually control the flow of water in the water inlet pipe.

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