Liquid level control device with anti-surge function

Abstract

The utility model discloses a liquid level control device with an anti-surge function, which belongs to the technical field of cooling tower equipment and comprises a control terminal, a liquid level sensor connected with an input end of the control terminal and an anti-surge box fixedly arranged on a wall plate of a water collecting tank. The liquid level sensor is arranged on the anti-surge box; an opening is formed in the face, close to the wall plate, of the anti-surge box, and a water passing hole used for communicating the anti-surge box with the water collecting tank is formed in the wall plate. According to the liquid level control device, the anti-surge box is arranged, so that the direct influence of sudden change or surge of water flow on the liquid level switch can be effectively prevented, the liquid level switch is ensured to stably work in a complex water flow environment, and the possibility of misreading caused by surge is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling tower equipment, in particular to a liquid level control device with a surge protection function. Background Art

[0002] Cooling towers are indispensable equipment for industrial production, and closed cooling towers occupy a considerable proportion. The principle of the closed cooling tower system is to use a spray pump to pump the cooling water in the water collection tank to the top of the equipment, and then use a water distribution system to evenly spray the water on the heat exchanger, thereby cooling and exchanging heat for the circulating water in the heat exchanger. The role of the spray pump is crucial in this process. The normal use of the spray pump requires the cooling water in the water collection tank to reach a certain depth, otherwise it will affect the heat exchange performance of the system. If it runs for a long time without water, it will cause damage to the spray pump. In order to use the cooling system efficiently and well, and to avoid damage to the spray pump due to too low a liquid level, it is necessary to promptly understand the liquid level in the water collection tank.

[0003] With the development of electrical information technology, it is now easy to convert the liquid level into an electrical signal and transmit it to the control end, so as to timely adjust the liquid level of the water collection tank and the operation of the spray pump. In addition, the duckbill float switch, reed switch float liquid level switch, and immersion float liquid level switch are more commonly used in the market. If these three liquid level switches are directly installed in the water collection tank, the fluctuation of the water in the water collection tank will have a greater impact on the liquid level switch. The fluctuation of the liquid surface will cause the displayed liquid level to be unstable, resulting in misjudgment.

[0004] Therefore, a liquid level control device with surge protection function is needed to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The utility model provides a liquid level control device with an anti-surge function, aiming to solve the problem raised in the background technology that if the three liquid level switches are directly installed in a water collecting tank, the fluctuation of water in the water collecting tank will have a greater impact on the liquid level switch, and the fluctuation of the liquid surface will cause the displayed liquid level height to be unstable, resulting in misjudgment.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a liquid level control device with an anti-surge function, comprising a control terminal and a liquid level sensor connected to the input end of the control terminal, and also comprising an anti-surge box fixedly arranged on the wall panel of the water collection tank, and the liquid level sensor is arranged on the anti-surge box; the setting of the anti-surge box effectively prevents the direct influence of sudden changes in water flow or surges on the liquid level sensor, so as to ensure that the liquid level sensor works stably in a complex water flow environment and reduce the possibility of misreading due to surges.

[0009] In order to effectively achieve surge protection, the side of the surge protection box close to the wall panel is provided with an opening, and the wall panel is provided with a water hole for connecting the surge protection box with the water collecting tank; when the water level in the water collecting tank fluctuates or surges, the opening of the surge protection box and the water hole on the wall panel work together to mitigate the direct impact of the water flow on the liquid level sensor, thereby improving the reliability of the liquid level sensor measurement.

[0010] Preferably, in order to enhance the surge protection effect, the height of the water hole is at least lower than one-third of the height of the surge protection box; when the water level in the sump fluctuates, especially when a surge occurs, the lower-positioned water hole can ensure that most of the surge energy is dispersed or weakened before reaching the liquid level sensor.

[0011] Preferably, for the convenience of installation, the surge protection box has an outwardly extending mounting edge at the position corresponding to the opening, bolts are fixedly installed on the wall panel, and positioning holes for the bolts to pass through are opened on the mounting edge; the cooperation of the positioning holes and the bolts makes the installation process between the surge protection box and the wall panel simpler and more intuitive, reducing the difficulty and complexity of installation.

[0012] Preferably, in order to ensure the sealing of the installation, a sealing strip is provided between the installation edge and the wall panel, and a perforation is opened on the sealing strip at the position corresponding to the bolt; the design of the sealing strip can effectively prevent liquid from penetrating or leaking from the gap between the installation edge and the wall panel, ensuring that no water leakage occurs at the connection between the surge protection box and the wall panel.

[0013] Preferably, in order to provide excellent sealing, the sealing strip is a butyl rubber strip; the butyl rubber strip has high peel strength and lasting adhesion, can maintain a stable sealing effect for a long time, and ensure a seamless connection between the surge protection box and the wall panel.

[0014] Preferably, in order to improve the flexibility of the surge protection box, a first screw hole is opened at the top of the surge protection box, and a removable first plug is inserted into the inside of the first screw hole; the design of the first screw hole and the first plug allows the top of the surge protection box to be flexibly configured as needed.

[0015] Preferably, in order to further improve the flexibility of the surge protection box, a second screw hole is opened on the side wall of the surge protection box, and a removable second plug is inserted into the interior of the second screw hole; the design of the second screw hole and the second plug makes it possible to easily plug and unplug the second plug as needed for different configurations or uses.

[0016] Preferably, in order to realize the precise liquid level protection function, the liquid level sensor is a reed switch float liquid level switch screwed into the first screw hole; the reed switch float liquid level switch works on the magnetic principle, has a simple structure but stable and reliable performance, can accurately detect liquid level changes, and quickly respond to output signals, ensuring the accuracy of liquid level control.

[0017] Preferably, in order to realize the precise liquid level protection function, the liquid level sensor is a immersion type float liquid level switch, and the lead of the immersion type float liquid level switch passes through the first screw port; the immersion type float liquid level switch is directly inserted into the liquid to be tested, and senses the liquid level changes in real time, and is not affected by the fluctuation of the liquid surface or external factors, thereby ensuring high-precision measurement.

[0018] Preferably, in order to realize the precise liquid level protection function, the liquid level sensor is a duckbill type float switch screwed inside the second screw hole; the duckbill type float switch can realize accurate liquid level detection by utilizing the buoyancy principle of the float ball and the sensing function of the reed switch.

[0019] (III) Beneficial effects

[0020] The liquid level control device can effectively prevent the direct impact of sudden changes in water flow or surges on the liquid level switch by setting up a surge protection box, so as to ensure that the liquid level switch can work stably in a complex water flow environment and reduce the possibility of misreading caused by surges.

[0021] The liquid level control device is provided with a water hole. When the water level in the water collection tank fluctuates or surges, the opening of the surge protection box and the water hole on the wall plate work together to reduce the direct impact of the water flow on the liquid level switch, thereby improving the reliability of the liquid level sensor measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an application schematic diagram of a liquid level control device with surge protection function;

[0023] Figure 2 It is an application explosion diagram of a liquid level control device with surge protection function;

[0024] Figure 3 This is a schematic structural diagram of a liquid level control device with surge protection function in Example 1;

[0025] Figure 4 This is a schematic structural diagram of a liquid level control device with surge protection function in Example 2;

[0026] Figure 5 This is a schematic diagram of the structure of a liquid level control device with surge protection function in Example 3.

[0027] In the figure:

[0028] 1. Liquid level sensor;

[0029] 2. water collecting tank; 21. wall plate; 211. water hole; 212. bolt;

[0030] 3. Surge protection box; 31. Opening; 32. Mounting edge; 33. First screw opening; 34. Second screw opening;

[0031] 4. Positioning hole;

[0032] 5. Sealing strip; 51. Perforation;

[0033] 6. The first plug;

[0034] 7. The second plug. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] The utility model provides a liquid level control device with surge protection function, such as Figure 1-2 As shown, the liquid level control device includes a control terminal and a liquid level sensor 1 connected to the input end of the control terminal, and also includes an anti-surge box 3 fixedly arranged on the wall plate 21 of the water collecting tank 2, and the liquid level sensor 1 is arranged on the anti-surge box 3; the anti-surge box 3 has an opening 31 on a side close to the wall plate 21, and the wall plate 21 is provided with a water hole 211 for connecting the anti-surge box 3 with the water collecting tank 2.

[0037] When in use, first place the liquid level sensor 1 connected to the control terminal on the anti-surge box 3, then install the side of the anti-surge box 3 with the opening 31 on the wall plate 21 of the sump 2, and at the same time open a water hole 211 on the wall plate 21 to connect the anti-surge box 3 and the sump 2. When in use, the liquid in the sump 2 can flow from the water hole 211 to the anti-surge box 3. In this process, due to the combined effect of the water hole 211 and the anti-surge box 3, the direct impact of the water flow on the liquid level sensor 1 can be slowed down, thereby improving its measurement result. However, when the liquid level sensor 1 is performing real-time measurement, it can transmit the data to the control terminal in a timely manner, and timely understand the liquid level situation in the sump 2. Finally, the corresponding operation can be performed, such as opening or closing the water supply valve, etc., to realize the control and adjustment of the liquid level.

[0038] Specifically, the surge protection box 3 has an outwardly extending mounting edge 32 at a position corresponding to the opening 31, a bolt 212 is fixedly mounted on the wall plate 21, and a positioning hole 4 for the bolt 212 to pass through is opened on the mounting edge 32;

[0039] First, determine the installation position of the surge protection box 3 on the wall panel 21, ensure that the opening 31 is aligned with the water hole 211 on the sump 2, then ensure that the positioning hole 4 set on the installation edge 32 is aligned with the bolt 212 set on the wall panel 21, and then, by rotating the corresponding bolt 212, the surge protection box 3 can be fixed on the wall panel 21.

[0040] Among them, in order to ensure the sealing of the installation, a sealing strip 5 is arranged between the installation edge 32 and the wall panel 21, and a through hole 51 is opened at the position corresponding to the bolt 212 on the sealing strip 5, and the sealing strip 5 is a butyl rubber strip; the butyl rubber strip has a high peel strength and lasting viscosity, and can maintain a stable sealing effect for a long time, which can ensure that there is no water leakage at the connection between the surge protection box 3 and the wall panel 21. At the same time, the setting of the through hole 51 can ensure that the bolt 212 can easily pass through the through hole 51 and connect with the corresponding positioning hole 4.

[0041] In addition, in order to enhance the surge protection effect, the height of the water hole 211 is at least one-third of the height of the surge protection box 3; when the water level in the sump 2 fluctuates, especially when a surge occurs, the lower position of the water hole 211 can ensure that most of the surge energy is dispersed or weakened before reaching the liquid level sensor 1.

[0042] It should be noted that the aperture of the water hole 211 is 10 mm; the design of a smaller aperture of 10 mm can further limit the flow speed of water in the sump 2 entering the surge protection box 3 through the water hole 211, which helps to reduce the direct impact of the water flow on the liquid surface in the surge protection box 3, thereby reducing the impact of fluctuations on the liquid level sensor 1.

[0043] Furthermore, in order to improve the flexibility of the surge protection box 3, a first screw hole 33 is opened at the top of the surge protection box 3, and a removable first plug 6 is inserted into the interior of the first screw hole 33; the design of the first screw hole 33 and the first plug 6 allows the top of the surge protection box 3 to be flexibly configured as needed. When in use, the top of the surge protection box 3 can be sealed by simply pulling out the first plug 6 or inserting the first plug 6 into the first screw hole 33.

[0044] Furthermore, in order to further improve the flexibility of the surge protection box 3, a second screw hole 34 is opened on the side wall of the surge protection box 3, and a removable second plug 7 is inserted into the interior of the second screw hole 34; the design of the second screw hole 34 and the second plug 7 makes it possible to conveniently plug and unplug the second plug 7 as needed for different configurations or uses. When in use, the side wall of the surge protection box 3 can be sealed by simply pulling out the second plug 7 or inserting the second plug 7 into the second screw hole 34.

[0045] Example 1

[0046] In order to achieve accurate liquid level protection function, such as Figure 3 As shown, the liquid level sensor 1 is a reed float liquid level switch screwed into the first screw hole 33;

[0047] When the liquid level sensor 1 is a reed switch float liquid level switch, the second plug 7 is used to seal the second screw hole 34. When in use, the duckbill float switch will monitor the liquid level changes in the surge protection box 3 and transmit them to the control terminal in time. When the liquid level in the surge protection box 3 is lower than the set position, the duckbill float switch will send a corresponding signal to the control terminal. At this time, the water supply valve is controlled to open and circulating water is added to the water collection tank 2. After the water collection tank 2 is replenished, the water flow in the water collection tank 2 will pass through the water hole 211, so that the liquid level in the surge protection box 3 will also rise. When it rises to the set height, the duckbill float switch will send a corresponding signal to the control terminal to control the water supply valve to close.

[0048] Example 2

[0049] Different from Example 1, Figure 4 As shown, in order to realize the precise liquid level protection function, the liquid level sensor 1 is a submersible float liquid level switch, and the lead wire of the submersible float liquid level switch runs through the first screw port 33;

[0050] When the liquid level sensor 1 is a immersion type float liquid level switch, the second plug 7 is used to seal the second screw hole 34. When in use, the immersion type float liquid level switch will monitor the liquid level changes in the anti-surge box 3 and transmit it to the control terminal in time. When the liquid level in the anti-surge box 3 is lower than the set position, the immersion type float liquid level switch will send a corresponding signal to the control terminal. At this time, the water supply valve is controlled to open, and circulating water is added to the water collection tank 2. After the water collection tank 2 is replenished, the water flow in the water collection tank 2 will pass through the water hole 211, so that the liquid level in the anti-surge box 3 will also rise. When it rises to the set height, the immersion type float liquid level switch will send a corresponding signal to the control terminal to control the water supply valve to close.

[0051] Example 3

[0052] Different from Example 1 and Example 2, Figure 5As shown, in order to realize the precise liquid level protection function, the liquid level sensor 1 is a duckbill type floating stop switch screwed inside the second screw port 34;

[0053] When the liquid level sensor 1 is a duckbill type float switch, the first plug 6 is used to seal the first screw hole 33. When in use, the duckbill type float switch will monitor the liquid level changes in the surge protection box 3 and transmit them to the control terminal in time. When the liquid level in the surge protection box 3 is lower than the set position, the duckbill type float switch will send a corresponding signal to the control terminal. At this time, the water supply valve is controlled to open, and circulating water is added to the water collection tank 2. After the water collection tank 2 is replenished, the water flow in the water collection tank 2 will pass through the water hole 211, so that the liquid level in the surge protection box 3 will also rise. When it rises to the set height, the duckbill type float switch will send a corresponding signal to the control terminal to control the water supply valve to close.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A liquid level control device with surge protection function, comprising a control terminal and a liquid level sensor (1) connected to an input end of the control terminal, characterized in that: It also includes a surge prevention box (3) fixedly arranged on a wall plate (21) of the water collecting tank (2), and the liquid level sensor (1) is arranged on the surge prevention box (3); The side of the surge protection box (3) close to the wall plate (21) has an opening (31), and the wall plate (21) is provided with a water hole (211) for connecting the surge protection box (3) with the water collecting tank (2).

2. The liquid level control device with surge protection function according to claim 1, characterized in that: The height of the water passage hole (211) is at least one third of the height of the surge protection box (3).

3. The liquid level control device with surge protection function according to claim 1, characterized in that: The surge protection box (3) has an outwardly extending mounting edge (32) at a position corresponding to the opening (31), a bolt (212) is fixedly mounted on the wall plate (21), and a positioning hole (4) for the bolt (212) to pass through is formed on the mounting edge (32).

4. The liquid level control device with surge protection function according to claim 3, characterized in that: A sealing strip (5) is provided between the installation edge (32) and the wall plate (21), and a through hole (51) is provided on the sealing strip (5) at a position corresponding to the bolt (212).

5. The liquid level control device with surge protection function according to claim 4, characterized in that: The sealing strip (5) is a butyl rubber strip.

6. The liquid level control device with surge protection function according to claim 1, characterized in that: A first screw hole (33) is provided at the top of the surge protection box (3), and a removable first plug (6) is inserted into the interior of the first screw hole (33).

7. The liquid level control device with surge protection function according to claim 6, characterized in that: A second screw hole (34) is provided on the side wall of the surge protection box (3), and a removable second plug (7) is inserted into the interior of the second screw hole (34).

8. The liquid level control device with surge protection function according to claim 6, characterized in that: The liquid level sensor (1) is a reed switch float liquid level switch screwed into the first screw hole (33).

9. The liquid level control device with surge protection function according to claim 6, characterized in that: The liquid level sensor (1) is a drop-in float liquid level switch, and the lead wire of the drop-in float liquid level switch passes through the first screw port (33).

10. The liquid level control device with surge protection function according to claim 7, characterized in that: The liquid level sensor (1) is a duckbill type floating stop switch screwed inside the second screw port (34).

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