Liquid level switch additionally arranged on water tank of cooling tower

Abstract

The utility model relates to the technical field of cooling tower water tanks, and particularly discloses a cooling tower water tank added liquid level switch which comprises a water tank groove which is of a rectangular water tank structure, the water tank groove is a main body structure of a cooling tower water tank, the upper end of the water tank groove is connected with a connecting cover in a clamping mode, and the water tank groove and the connecting cover jointly form the cooling tower water tank. The cooling tower water tank is additionally provided with the liquid level switch, accurate control over the water level of the water tank is achieved through a double monitoring system of the capacitance monitoring end and the limiting clamp and the floating ball and the contact switch, when the water level drops to the set low water level, the capacitance monitoring end triggers the limiting clamp, and the first controller controls the electric valve to be opened for water supplementing; when the water level rises to the set high water level, the floating ball triggers the contact switch, the second controller controls the electric valve to be closed and stops water replenishing, the precision and reliability of water level control are effectively improved through a dual monitoring mechanism, and the problem of misjudgment possibly occurring in a single monitoring system is solved.

Description

Technical Field

[0001] This utility model relates to the field of cooling tower water tank technology, specifically to a cooling tower water tank equipped with a liquid level switch. Background Technology

[0002] As a key piece of equipment for heat exchange in industrial and civil fields, the precise control of the water tank level in cooling towers plays a crucial role in the stable operation and energy consumption management of the equipment. In the traditional operation of cooling towers, water tank level control relies heavily on manual inspection and adjustment, which not only consumes a lot of manpower, but also suffers from problems such as response lag and low control accuracy, making it difficult to meet the needs of modern industrial production for equipment automation and intelligence.

[0003] In complex electromagnetic environments at industrial sites, some electronic liquid level monitoring sensors are susceptible to electromagnetic interference, leading to inaccurate monitoring data. Furthermore, while existing high-precision liquid level monitoring equipment can achieve relatively accurate liquid level measurement, the installation process is cumbersome and the subsequent maintenance costs are high. Utility Model Content

[0004] The purpose of this utility model is to provide a cooling tower water tank with a liquid level switch to solve the problems mentioned in the background art. In the complex electromagnetic environment of industrial sites, some electronic liquid level sensors are easily affected by electromagnetic interference, resulting in inaccurate monitoring data. In addition, although existing high-precision liquid level monitoring equipment can achieve relatively accurate liquid level measurement, the installation process is cumbersome and the subsequent maintenance cost is high.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cooling tower water tank equipped with a liquid level switch, including a water tank trough, which is a rectangular water tank structure. The water tank trough is the main structure of the cooling tower water tank, and a connecting cover is snapped onto the upper end of the water tank trough. The water tank trough and the connecting cover together constitute the cooling tower water tank.

[0006] The water tank has an outlet pipe on its side wall and the bottom of the inner wall of the water tank is inclined. The bottom of the connecting cover has an inlet pipe and an electric valve inside the inlet pipe. One side of the inlet pipe is penetrated by an installation rod, and a controller is fixed on the side wall of the installation rod. The bottom of the installation rod is covered with a waterproof sleeve, and the bottom of the waterproof sleeve is penetrated by a limiting card, which abuts against the surface of the capacitor monitoring terminal.

[0007] A second controller is vertically installed at the bottom of the inner wall of the water tank, and a contact switch is fixed at the upper end of the second controller. The contact switch is covered with a corrugated tube, and a float is installed at the top of the corrugated tube. A float ball is embedded at the top of the float.

[0008] By adopting the above technical solution, the system monitors the low water level through a float ball and contact switch, and monitors the high water level through a limit card and capacitor monitoring terminal, thus achieving automatic and accurate water replenishment and overflow protection, avoiding manual intervention and improving system reliability.

[0009] Preferably, the bottom end of the inclined surface of the water tank is close to the liquid outlet pipe, and a sealing ring is installed at the connection between the water tank and the connecting cover.

[0010] The above technical solution features a sloping bottom surface in the water tank that facilitates drainage, reduces residual scale, and a sealing ring that ensures no leakage at the connection points, thus extending the equipment's lifespan and reducing maintenance costs.

[0011] Preferably, the motor and shaft of the electric valve pass through the side wall of the inlet pipe, and a sealing element is fitted into the opening of the side wall of the inlet pipe.

[0012] By adopting the above technical solution, the sealing design of the electric valve and the liquid inlet pipe prevents water leakage, avoids the risk of motor short circuit, and ensures electrical safety.

[0013] Preferably, the waterproof sleeve and the mounting rod form a two-layer sleeve structure, and the bottom end of the mounting rod is slidably connected to a limit card, and the opening shape of the limit card is annular.

[0014] The above technical solution, with its double-layer sleeve structure protecting the circuit and sliding contact design, makes the float move more flexibly and reduces jamming faults.

[0015] Preferably, the annular opening of the limiting card is penetrated by the spiral cable of the capacitance monitoring end, and the spiral cable of the capacitance monitoring end is connected to the bottom of the mounting rod.

[0016] Using the above technical solution, the rope passes through the ring-shaped contact switch to ensure the stability of the float's trajectory and improve the accuracy of low water level detection.

[0017] Preferably, the top of the contact switch abuts against the top of the inner cavity of the float rod, and the float rod and the float ball are made of the same material.

[0018] By adopting the above technical solution, the float and the float rod are made of the same material, which avoids loosening of the connection due to thermal expansion and contraction or corrosion, and enhances the stability of high water level detection.

[0019] Preferably, the bottom end of the corrugated pipe is penetrated by the controller two, and the switch of the controller two penetrates the water tank, and a sealing element is provided at the connection between the water tank and the controller two.

[0020] Using the above technical solution, the corrugated pipe is used to pull the float and prevent the float from being carried away and drifting by the buoyancy of the water during use.

[0021] Compared with the prior art, the beneficial effects of this utility model are: the cooling tower water tank is equipped with a liquid level switch.

[0022] 1. A dual monitoring mechanism is adopted, consisting of a capacitance monitoring terminal and a limit card, as well as a float and a contact switch. Dual monitoring can effectively avoid the misjudgment problems that may occur in a single monitoring system, improve the accuracy and reliability of water level control, reduce manual intervention, and ensure the stable operation of the cooling tower equipment. When the water level drops to the set low water level, the capacitance monitoring terminal detects the slight capacitance change caused by the water level change, triggering the limit card. After receiving the signal, the controller controls the electric valve to open and replenish water.

[0023] When the water level rises to the set high water level, the float rises with the water level, driving the float rod to rise, causing the top of the float rod's inner cavity to separate from the contact switch. Controller 2 then controls the electric valve to close, stopping the water supply.

[0024] 2. The corrugated pipe is fitted over the contact switch, and its bottom end is tightly connected to the controller. It can pull the float and prevent the float from drifting under the buoyancy of the water. A sealing ring is installed at the connection between the water tank and the connecting cover. A sealing element is fitted into the opening on the side wall of the liquid inlet pipe. A sealing element is provided at the connection between the water tank and the controller. This increases the sealing of the entire liquid level switch electronic equipment. The multiple sealing design can prevent water leakage, avoid electrical safety problems such as motor short circuits, extend the service life of the equipment, and reduce maintenance costs.

[0025] 3. The bottom of the inner wall of the water tank is inclined, with the bottom of the incline closest to the outlet pipe. This allows water to drain more smoothly from the tank, preventing water accumulation, reducing scale buildup and corrosion, and facilitating future maintenance. The capacitor monitoring terminal is connected to the bottom of the mounting rod via a spiral cable. The spiral cable passes through the annular opening of the limit clamp, which restricts the movement trajectory of the capacitor monitoring terminal, preventing excessive collision with the bottom of the mounting rod during floating. This ensures the stability of the capacitor monitoring terminal during movement, reduces jamming, and makes liquid level monitoring more accurate and reliable. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the overall internal side section of the present invention.

[0028] Figure 3 This is a three-dimensional structural diagram of the water tank and controller of this utility model.

[0029] Figure 4 This is a three-dimensional structural diagram of the connection cover and electric valve installation of this utility model;

[0030] Figure 5 This is a three-dimensional structural diagram of the controller and contact switch of this utility model.

[0031] Figure 6 This is a three-dimensional structural diagram of the electric valve and controller of this utility model.

[0032] In the diagram: 1. Water tank; 2. Connecting cover; 3. Inlet pipe; 4. Outlet pipe; 5. Electric valve; 6. Controller 1; 7. Mounting rod; 8. Waterproof sleeve; 9. Limiting clip; 10. Capacitor monitoring terminal; 11. Controller 2; 12. Contact switch; 13. Corrugated pipe; 14. Float; 15. Float ball. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Please see Figures 1-6 This utility model provides a technical solution: a cooling tower water tank equipped with a liquid level switch, including a water tank 1, a connecting cover 2, an inlet pipe 3, an outlet pipe 4, an electric valve 5, a controller 1 6, an installation rod 7, a waterproof sleeve 8, a limit card 9, a capacitor monitoring terminal 10, a controller 2 11, a contact switch 12, a corrugated pipe 13, a float rod 14, and a float ball 15;

[0035] Among them, the water tank 1 is a rectangular water tank structure. The water tank 1 is the main structure of the cooling tower water tank, and the upper end of the water tank 1 is connected to the connecting cover 2. The water tank 1 and the connecting cover 2 together constitute the cooling tower water tank.

[0036] A liquid outlet pipe 4 is provided on the side wall of the water tank 1, and the bottom of the inner wall of the water tank 1 is inclined. A liquid inlet pipe 3 is provided at the bottom of the connecting cover 2, and an electric valve 5 is inside the liquid inlet pipe 3. One side of the liquid inlet pipe 3 is penetrated by an installation rod 7, and a controller 6 is fixed on the side wall of the installation rod 7. A waterproof sleeve 8 is fitted on the bottom of the installation rod 7, and a limit card 9 is penetrated at the bottom of the waterproof sleeve 8. The limit card 9 abuts against the surface of the capacitor monitoring terminal 10. The bottommost end of the inclined surface of the bottom of the water tank 1 is close to the liquid outlet pipe 4, and a sealing ring is installed at the connection between the water tank 1 and the connecting cover 2. The motor and shaft of the electric valve 5 penetrate the side wall of the liquid inlet pipe 3, and a sealing element is fitted at the opening of the side wall of the liquid inlet pipe 3.

[0037] Referring to the attached diagrams in the instruction manual Figures 1-6As shown, place the water tank of the cooling tower in the water tank tank 1, ensuring that it is stable and fixed. Pay attention to the slope direction of the bottom of the inner wall of the water tank tank 1, so that the bottom of the slope is close to the liquid outlet pipe 4 to facilitate drainage. Apply an appropriate amount of sealant evenly in the groove at the upper end of the water tank tank 1. Align the connecting cover 2 with the groove and slowly lower it and lock it in place. Gently press the connecting cover 2 to make the connection tight and ensure that the sealing ring plays a sealing role to prevent water leakage.

[0038] Install the electric valve 5 inside the inlet pipe 3, ensuring that the motor and shaft are securely installed and that the shaft can drive the valve to open and close normally. Then install the inlet pipe 3 at the corresponding opening at the bottom of the connecting cover 2, and fit a sealing element into the opening on the side wall of the inlet pipe 3 to make the inlet pipe 3 and the connecting cover 2 tightly connected to prevent water leakage.

[0039] Place the waterproof sleeve 8 onto the bottom of the mounting rod 7, ensuring a tight fit to form a two-layer rod structure. Install the limit card 9 at the bottom of the waterproof sleeve 8, allowing it to slide smoothly at the bottom of the mounting rod 7, with the annular opening of the limit card 9 aligned with the bottom of the mounting rod 7. Connect the capacitor monitoring terminal 10 to the bottom of the mounting rod 7 via a spiral cable, ensuring the spiral cable passes through the annular opening of the limit card 9. Adjust the position of the capacitor monitoring terminal 10 to accurately monitor liquid level changes. Insert the mounting rod 7 through one side of the inlet pipe 3 and fix it in a suitable position. Install the controller 6 on the side wall of the mounting rod 7 and connect the wiring.

[0040] Install controller 2 11 vertically at the bottom of the inner wall of water tank 1, ensuring a firm installation. Fix contact switch 12 to the upper end of controller 2 11. Then, put bellows 13 over contact switch 12, so that the bottom end of bellows 13 is tightly connected to controller 2 11, and the switch of controller 2 11 passes through water tank 1. Install a seal at the connection. Embed float 14 into float ball 15, and then install float 14 on the top of bellows 13, ensuring that the top of contact switch 12 abuts against the top of the inner cavity of float 14.

[0041] A controller 11 is vertically installed at the bottom of the inner wall of the water tank 1, and a contact switch 12 is fixed at the upper end of the controller 11. The contact switch 12 is covered with a corrugated tube 13, and a float 14 is installed at the top of the corrugated tube 13. A float ball 15 is embedded at the top of the float 14. The waterproof sleeve 8 and the mounting rod 7 form a two-layer sleeve structure, and a limit card 9 is slidably connected to the bottom of the mounting rod 7. The opening of the limit card 9 is annular, and the spiral cable of the capacitor monitoring terminal 10 passes through the annular opening of the limit card 9. The spiral cable of the capacitor monitoring terminal 10 is connected to the bottom of the mounting rod 7. The top of the contact switch 12 abuts against the top of the inner cavity of the float 14. The float 14 and the float ball 15 are made of the same material. The bottom of the corrugated tube 13 is penetrated by the controller 11, and the switch of the controller 11 passes through the water tank 1. A seal is provided at the connection between the water tank 1 and the controller 11.

[0042] Referring to the attached diagrams in the instruction manual Figures 1-6 As shown, during normal use, the capacitor monitoring terminal 10 monitors the liquid level changes. When the water level drops to the set low level, the capacitor monitoring terminal 10 accurately transmits the signal to the controller 6. The controller 6 controls the electric valve 5 to open for internal water supply. When the capacitor monitoring terminal 10 malfunctions and fails to start, the liquid flows through the outlet pipe 4, causing the water level to drop. The buoyancy of the water is insufficient to support the float 15 and float rod 14 to remain in an elevated state, causing the contact switch 12 to be triggered by the float rod 14. The controller 11 then sends an electrical signal to control the electric valve 5 to open, and the liquid flows into the water tank 1 through the inlet pipe 3. At this time, the float 15 and float rod 14 rise, and the contact switch 12 separates from the float rod 14, causing the controller 11 to stop sending electrical signals to the electric valve 5.

[0043] Working principle: When a level switch is installed on the cooling tower water tank, when the water level in the tank 1 drops, the capacitor monitoring terminal 10 detects the small capacitance caused by the change in water level during the drop. When the water level drops to a certain level, the capacitor monitoring terminal 10 transmits an electrical signal to the controller 6 on the side wall of the mounting rod 7. After receiving the signal, the controller 6 controls the electric valve 5 in the inlet pipe 3 to open, and water flows into the tank 1 through the inlet pipe 3 to replenish the water. The two-layer sleeve structure of the waterproof sleeve 8 and the mounting rod 7, as well as the protection of the float rod 14 by the corrugated pipe 13, and the addition of a seal at the connection of the contact switch 12 installed in the float rod 14, effectively prevent water from corroding the electronic components. At the same time, the sealing ring at the connection between the tank 1 and the connecting cover 2, the seal at the opening of the side wall of the inlet pipe 3, and the seal at the connection between the tank 1 and the controller 11, comprehensively ensure the sealing of the entire level switch system and extend the service life of the equipment.

[0044] Because the bottom of the inner wall of the water tank 1 is inclined, and the bottom of the inclined surface is close to the outlet pipe 4, the water in the water tank can be discharged more smoothly, avoiding water accumulation, reducing scale buildup and corrosion of the water tank. The float ball 15 and float rod 14 installed on one side provide auxiliary liquid level monitoring. When the liquid level is low, the float ball 15 and float rod 14 are lowered by gravity and come into contact with the contact switch 12, thereby triggering the controller 11 to send a signal to the electric valve 5 to open the gate and supply water. The contact switch 12 and float rod 14 are sleeved by the bellows 13, which prevents them from drifting due to water buoyancy during use, and also makes the entire liquid level monitoring system operate more stably, increasing the overall practicality.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A retrofit liquid level switch for a cooling tower basin, comprising: A water tank (1) is a rectangular water tank structure. The water tank (1) is the main structure of the cooling tower water tank, and a connecting cover (2) is snapped onto the upper end of the water tank (1). The water tank (1) and the connecting cover (2) together constitute the cooling tower water tank. The water tank (1) has an outlet pipe (4) on its side wall, and the bottom of the inner wall of the water tank (1) is inclined. The connecting cover (2) has an inlet pipe (3) at its bottom end, and an electric valve (5) is inside the inlet pipe (3). One side of the inlet pipe (3) is penetrated by an installation rod (7), and the installation rod... (7) A controller (6) is fixed on the side wall. The bottom end of the mounting rod (7) is fitted with a waterproof sleeve (8), and the bottom end of the waterproof sleeve (8) is penetrated by a limiting card (9). The limiting card (9) abuts against the surface of the capacitor monitoring end (10). A controller (11) is vertically installed at the bottom end of the inner wall of the water tank (1). A contact switch (12) is fixed at the upper end of the controller (11). The contact switch (12) is fitted with a corrugated tube (13), and a float (14) is installed at the top of the corrugated tube (13). A float ball (15) is embedded at the top of the float (14).

2. A liquid level switch for retrofitting to a cooling tower basin according to claim 1, wherein: The bottom end of the inclined surface of the water tank (1) is close to the liquid outlet pipe (4), and a sealing ring is installed at the connection between the water tank (1) and the connecting cover (2).

3. A liquid level switch for retrofitting to a cooling tower basin according to claim 1, wherein: The motor and shaft of the electric valve (5) pass through the side wall of the inlet pipe (3), and a sealing element is fitted into the opening of the side wall of the inlet pipe (3).

4. A liquid level switch for retrofitting to a cooling tower basin according to claim 1, wherein: The waterproof sleeve (8) and the mounting rod (7) form a two-layer sleeve structure, and the bottom end of the mounting rod (7) is slidably connected to a limit card (9), and the opening shape of the limit card (9) is annular.

5. A liquid level switch for retrofitting to a cooling tower basin according to claim 1, wherein: The annular opening of the limiting card (9) is penetrated by the spiral cable of the capacitance monitoring end (10), and the spiral cable of the capacitance monitoring end (10) is connected to the bottom of the mounting rod (7).

6. A liquid level switch for retrofitting to a cooling tower basin according to claim 1, wherein: The top of the contact switch (12) abuts against the top of the inner cavity of the float (14), and the float (14) and the float (15) are made of the same material.

7. A liquid level switch for retrofitting to a cooling tower basin according to claim 1, wherein: The bottom end of the corrugated pipe (13) is penetrated by the controller two (11), and the switch of the controller two (11) penetrates the water tank (1), and a seal is provided at the connection between the water tank (1) and the controller two (11).

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