Automatic blowdown control device for cooling tower

Abstract

The utility model discloses an automatic blowdown control device for a cooling tower, and relates to the field of cooling devices. The device comprises a control box and an electric two-way valve installed on a blow-off pipe of the cooling tower, a main circuit is installed in the control box, the electric two-way valve and a time relay are installed in the main circuit in parallel, a rotary switch is installed on the surface of the control box, two connecting lines are arranged in the rotary switch, and the two connecting lines are connected with the main circuit. Wherein one connecting line is connected with the electric two-way valve in parallel, and the other connecting line is connected with the time relay in series. According to the utility model, the automatic control of the pollution discharge process of the cooling tower is realized, a special person needs to be arranged to observe the cooling tower for a long time to determine a proper pollution discharge opportunity under the previous manual pollution discharge mode, a large amount of manpower is undoubtedly consumed, and the dependence on long-time manual monitoring is eliminated by virtue of the automatic function of the device, so that the pollution discharge time is greatly shortened. And the labor cost is greatly saved.

Description

Technical Field

[0001] This utility model belongs to the field of cooling devices, and more specifically, it relates to an automatic sewage discharge control device for cooling towers. Background Technology

[0002] Cooling towers play a crucial role in industrial production. They use water as a circulating cooling medium and rely on the heat exchange that occurs when water comes into contact with air. Whether open or closed, cooling towers absorb and release the heat generated during system operation into the atmosphere through different heat transfer pathways, thereby lowering the water temperature. They are indispensable evaporative cooling devices for ensuring the normal operation of the system and are also a type of water-saving and energy-efficient recycling device.

[0003] However, the sewage discharge technology of commonly used cooling towers on the market is relatively outdated. It mainly relies on manual observation of the turbidity of the cooling water and manual opening of the drain valve based on subjective judgment. Considering that cooling towers are mostly installed in special locations such as rooftops, this manual sewage discharge method is prone to situations where no one observes or discharges the sewage for extended periods during long-term operation, leading to the following potential hazards:

[0004] 1. As water evaporates, the concentration of calcium and magnesium ions in the water increases, resulting in a large amount of dirt. This dirt not only adheres to the cooling tower packing (or the coils in a closed tower) but also to the channels through which the system flows, reducing the system's heat exchange efficiency.

[0005] 2. Dust in the air is adsorbed or deposited into the cooling tower, and sludge will adhere to the inside of the cooling tower, pipes, water pumps and heat exchange equipment as the system operates, reducing the heat exchange efficiency of the equipment;

[0006] 3. Under-deposit corrosion, an electrochemical corrosion caused by C and Fe ions, occurs in the pipes and metal components through which water flows, reducing the overall service life of the system;

[0007] 4. Cooling towers are located in well-ventilated areas with plenty of sunlight, where the temperature is suitable for the growth of bacteria and algae. Legionella and other microorganisms not only bring a large number of microbial hazards, but the slime, scale, and rust that grows form complex scale, which makes water treatment more difficult and expensive, and it is still difficult to solve the scale / rust problem.

[0008] The aforementioned hazards will not only significantly reduce the cooling efficiency of the cooling tower, but also cause a large amount of dirt to adhere to the equipment, pipe walls and cooling tower packing surface, reducing the heat exchange efficiency of the equipment and system, increasing energy consumption, increasing management costs, reducing the lifespan of the equipment system and other negative impacts on production efficiency, and even causing serious problems such as equipment damage, frequent failures or even production stoppage. Utility Model Content

[0009] In response to a series of problems arising from the manual sewage discharge method used in the existing cooling tower process, such as long periods of unattended operation and untimely sewage discharge due to limitations in human supervision, which leads to decreased cooling efficiency and equipment damage, this solution aims to provide a more efficient and reliable automatic sewage discharge solution to improve the overall operating performance and stability of the cooling tower.

[0010] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0011] This utility model relates to an automatic sewage discharge control device for cooling towers, comprising a control box and an electric two-way valve installed on the sewage discharge pipe of the cooling tower. The control box contains a main circuit, and the electric two-way valve and a time relay are installed in parallel within the main circuit. A rotary switch is installed on the surface of the control box, and the rotary switch contains two connection lines, one of which is connected in parallel with the electric two-way valve, and the other is connected in series with the time relay.

[0012] Furthermore, a circuit breaker connected in series with the main circuit is installed inside the control box.

[0013] Furthermore, a fuse connected in series with the main circuit is installed inside the control box.

[0014] Furthermore, intermediate relays are installed at both ends of the electric two-way valve.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model realizes the automated control of the cooling tower sewage discharge process. In the previous manual sewage discharge mode, it was necessary to arrange for a dedicated person to observe the cooling tower for a long time to determine the appropriate time for sewage discharge, which undoubtedly consumed a lot of manpower. However, with the automation function of this device, the reliance on long-term manual monitoring is eliminated, greatly saving labor costs and enabling human resources to be more rationally allocated to other important work links.

[0017] 2. This utility model can achieve a dual improvement in production efficiency and equipment lifespan. In the past, due to the many uncertainties of manual sewage discharge, there were often long periods without sewage discharge. This not only led to a significant decrease in the cooling efficiency of the cooling tower, seriously affecting the operating efficiency of the entire production system, but also caused a large amount of dirt to gradually accumulate on the equipment pipe walls and cooling tower packing, accelerating equipment wear and aging. The application of this automatic sewage discharge control device fundamentally eliminates such problems. Through timed and precise automatic sewage discharge, the cooling tower is always kept in good operating condition, significantly improving production efficiency. At the same time, it reduces the corrosion of equipment by dirt, effectively extends the service life of the equipment, reduces the cost of equipment replacement and maintenance, and brings long-term and considerable economic benefits to enterprises.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the utility model embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, the drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the connection structure between the control device and the cooling tower of this utility model;

[0021] Figure 2 This is a schematic diagram of the automatic sewage discharge control principle of the control device of this utility model. Detailed Implementation

[0022] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0023] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0024] Please see Figure 1 , Figure 2 As shown, this utility model is an automatic sewage discharge control device for cooling towers, including a control box and an electric two-way valve M installed on the sewage discharge pipe of the cooling tower. The control box contains a main circuit, and the electric two-way valve M and the time relay SJ are installed in parallel in the main circuit. A rotary switch 1SA1 is installed on the surface of the control box. The rotary switch 1SA1 has two connection lines, one of which is connected in parallel with the electric two-way valve M, and the other is connected in series with the time relay SJ.

[0025] Among them, the time relay SJ, as the core component of the automatic control mode, can accurately control the opening and closing of the electric two-way valve M according to the preset time parameters, so as to realize the automated sewage discharge operation. The rotary switch 1SA1 is the key component for switching between manual control and automatic control modes. When automatic sewage discharge is required, the rotary switch 1SA1 is adjusted to the automatic position (that is, the time relay SJ is connected to the main circuit), so that the electric two-way valve M can open and close on time and accurately according to the preset parameters of the time controller SJ, so as to realize the automatic sewage discharge function. When manual control of sewage discharge is required, the rotary switch 1SA1 is switched to the manual control position (that is, the connection line connected to the time relay SJ is disconnected, and the other connection line is connected to the main circuit). At this time, the electric two-way valve M opens and sewage discharge begins.

[0026] Specifically, the control box is equipped with a circuit breaker QF connected in series with the main circuit. The circuit breaker QF protects against overload and short circuit, ensuring the safe and stable operation of the entire circuit system.

[0027] Specifically, the control box is equipped with a fuse FU connected in series with the main circuit. The fuse FU plays a protective role in the circuit. When an abnormally large current occurs in the circuit, it can melt in time, cut off the circuit, and prevent damage to other components due to excessive current.

[0028] Specifically, intermediate relays KA1 and KA2 are installed at both ends of the electric two-way valve M. Intermediate relays KA1 and KA2 on the same side are connected in parallel. Intermediate relays KA1 and KA2 play the role of signal transmission and amplification in the circuit, which can enhance the stability and driving capability of the control signal and ensure the reliable operation of each control link.

[0029] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize the utility model.

Claims

1. An automatic sewage discharge control device for cooling towers, comprising a control box and an electrically operated two-way valve (M) installed on the sewage discharge pipe of the cooling tower, characterized in that: The control box contains a main circuit. The electric two-way valve (M) and the time relay (SJ) are installed in parallel within the main circuit. A rotary switch (1SA1) is installed on the surface of the control box. The rotary switch (1SA1) contains two connection lines. One connection line is connected in parallel with the electric two-way valve (M), and the other connection line is connected in series with the time relay (SJ).

2. The automatic sewage discharge control device for a cooling tower according to claim 1, characterized in that: The control box contains a circuit breaker (QF) connected in series with the main circuit.

3. The automatic sewage discharge control device for a cooling tower according to claim 1, characterized in that: The control box contains a fuse (FU) connected in series with the main circuit.

4. The automatic sewage discharge control device for a cooling tower according to claim 1, characterized in that: The electric two-way valve (M) is equipped with an intermediate relay (KA1) and an intermediate relay (KA2) at both ends.

5. The automatic sewage discharge control device for a cooling tower according to claim 4, characterized in that: Intermediate relays (KA1) and (KA2) on the same side are connected in parallel.

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