Parallel cooling tower group hydraulic balance adjusting device and parallel cooling tower group

Abstract

The application discloses a parallel cooling tower group hydraulic balance adjusting device and a parallel cooling tower group, and belongs to the technical field of centralized central air conditioner hydraulic balance adjusting. The device comprises a shell, a water inlet channel for cooling circulating water, at least two water outlet channels for discharging the cooling circulating water, and a static pressure shunt cavity connecting the water inlet channel and the water outlet channel; a shunt plate is fixed in the static pressure shunt cavity and abuts against the top wall surface and the bottom wall surface of the static pressure shunt cavity, so that the static pressure shunt cavity is divided into at least two shunt cavities with equal volumes; wherein the water inlet channel comprises a first end and a second end, the first end extends into the static pressure shunt cavity, and is arranged to be inclined towards the top wall surface of the static pressure shunt cavity. The application can ensure equal distribution of water flow on both sides of the cooling tower and minimize the total resistance of the cooling water system.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic balance regulation technology for cooling towers and open pipelines in centralized central air conditioning and industrial process cooling water systems. More specifically, it relates to a hydraulic balance regulation device for parallel cooling tower groups and parallel cooling tower groups. Background Technology

[0002] This type of open-type crossflow cooling tower features a cooling fan located at the top center of the tower. Independent water inlet spray trays and heat dissipation packing are located on either side of the tower. Cooling water enters from the top and flows into the spray trays, where it is sprayed onto the heat dissipation packing via diffuser nozzles. After cooling, the water collects in a basin at the bottom of the tower and exits through the outlet. Cooling air flows laterally into the heat dissipation packing from the inlets on both sides, where it comes into contact with the hot water flowing through the packing, resulting in evaporative heat exchange. The hot air is then extracted by the fan at the top center of the tower. In essence, this type of open-type crossflow cooling tower is characterized by cooling water flowing from top to bottom, cooling air flowing laterally from both sides, and air exiting from the top; independent water and air inlets on both sides, evaporative heat exchange, and the hot air converging before being extracted by the axial flow fan at the top center.

[0003] In engineering applications, open crossflow cooling towers typically use two methods for their inlet connections: either a single inlet pipe leading to the tower and then splitting into two pipes connecting to the inlets of the two trays on either side, or separate inlet pipes on each side connecting to the tray inlets. The inlet pipe is usually higher than the inlet, and the horizontal inlet pipe requires an elbow connecting downwards to the inlet. Valves are installed before the inlets for regulating the water flow and for maintenance. Because the two inlet pipes are separate, higher than the inlets, and the outlets are open with zero resistance, during operation, either inlet pipe is initially full. After water flows downwards, a negative pressure siphon effect is generated, creating a dominant jet flow. This results in the water flow at the other outlet being significantly lower than the dominant outlet, leading to uneven water flow distribution across the cooling tower's inlets. This phenomenon is not fixed and varies with the total cooling circulation water volume, and cannot be eliminated by adjusting the pipe valves. In severe cases, one side may have water flowing out while the other side has no flow; the situation is even more severe in systems with multiple cooling towers.

[0004] When the water inflow on both sides of an open crossflow cooling tower is unbalanced, the water film on the packing material on both sides of the cooling tower becomes uneven in thickness, or some packing material has a water film while others do not. Areas with a thicker water film experience greater airflow resistance, while areas with a thinner or no water film experience less airflow resistance. This results in lower airflow where the water film is thicker and higher airflow where the water film is thinner or no water film is present, severely impacting the cooling tower's evaporative cooling performance.

[0005] To address these issues, many projects conduct circulating water system adjustments in the early stages of operation, performing hydraulic balance adjustments on the cooling tower water distribution under design conditions to ensure that the system meets design hydraulic balance requirements during rated operation. However, air conditioning systems operate outside of rated conditions for more than 80% of the year, and the cooling-side equipment (cooling tower, cooling water circulating pump) also exhibits various operating combinations. When operating outside of rated conditions, the aforementioned manual adjustment methods, even with dedicated manpower, cannot meet the dynamic needs of real-time changes in the system's hydraulic balance. Moreover, the required manpower costs are enormous and the results are not significant.

[0006] To address the aforementioned issues, the current mainstream strategy is to achieve real-time monitoring and regulation using balancing valves to ensure hydraulic balance. One feasible solution is to employ electrically operated regulating valves with controllable opening for real-time monitoring and regulation. For example, Chinese invention patent application CN202110020078.X, filed on January 7, 2021, discloses a dynamic hydraulic balance regulation method and system for a cooling tower group water system. This method is based on real-time monitoring of the cooling water circulation pump, the operating status and frequency of each cooling tower, the total cooling water supply pipe pressure PG of the cooling tower group, the cooling water branch pipe supply pressures of the cooling tower group (PG-1, PG-2, ..., PG-m, where m represents the total number of branch pipes in the cooling tower group), and the supply branch pipe pressures of each cooling tower (P1-1, P1-2, ..., P1-m). The monitoring and collection of data such as ..., P1-n, ..., Pm-1, Pm-2, ..., Pm-n (where m represents the total number of branch pipes in the cooling tower group, and n represents the total number of cooling water supply branch pipes in each branch pipe) are performed. The difference ΔP (i.e., the difference between PG and Pm-n) between the pressure of each cooling tower's water distribution branch pipe and the total cooling water supply pipe of the cooling tower group is analyzed. Data is compared with the "state storage database," and the opening of the electric regulating valve is adjusted using the proportional-integral-derivative method. Data collection and imbalance rate calculation are then performed again, and this process is repeated until the imbalance rate reaches the preset target. This ensures that each operating cooling tower meets the hydraulic balance requirements between its water distribution branch pipes under the premise of dynamic system operation. For example, Chinese invention patent application number CN201821119806.2, filed on July 16, 2018, discloses an industrial flow balancing system, including a cooling tower, a circulating water pump, an industrial hydraulic balancing device, a distillation column, an electrically controlled regulating valve, a longitudinal parallel pipe, a pressure sensor P, and a temperature sensor T. This invention can adjust the flow balance of the industrial circulation system when there is more than one distillation column. It adopts a longitudinal parallel structure and calculates the pipe diameter of the parallel pipe network using a calculation formula to determine the actual flow demand. Based on the flow balance of the distillation column and the current operating load, the opening of the electrically controlled regulating valve is adjusted and controlled in real time; this completely solves the problems of uneven industrial cooling water flow, which lead to large system redundancy, high system energy consumption, large energy loss, and low product quality.

[0007] However, the above-mentioned method of using electrically adjustable valves with controllable opening to achieve real-time monitoring and regulation is expensive and the equipment operating efficiency is low; moreover, the amount of engineering work and the difficulty of modification are large during the installation and implementation process, whether for existing buildings or new buildings.

[0008] Another possible solution is to use a mechanical hydraulic balancing mechanism to regulate the flow of industrial cooling water. For example, Chinese invention patent application CN201520842225.1, filed on October 28, 2015, discloses an open-loop cooling water energy-saving system with a hydraulic balancing mechanism. This system includes connecting pipes for transmitting circulating water and a heat exchanger, cooling tower, and cooling water pump connected sequentially along the water flow direction. The circulating cooling water system is equipped with a hydraulic balancing mechanism, and the cooling water pump is a variable-condition operating cooling water pump. This invention, by rationally solving the hydraulic balance of the open-loop cooling water system, can eliminate some ineffective cooling flow and, with the addition of a variable-condition operating cooling water pump adapted to the system, reduces energy consumption and achieves energy saving in the open-loop cooling water system. However, the design of the mechanical hydraulic balancing mechanism increases the total resistance of the cooling water system pipes, which not only places higher demands on the head of the cooling water circulating pump but also has a certain impact on the overall energy saving of the system.

[0009] In summary, the urgent technical challenge is to provide a low-cost, minimally invasive parallel cooling tower hydraulic balance regulating device and parallel cooling tower group that can avoid the total resistance of the cooling water system's pipelines. Summary of the Invention

[0010] 1. The problem to be solved

[0011] To address the problems existing in the prior art, the present invention provides a hydraulic balance regulating device for parallel cooling tower groups and a parallel cooling tower group, so as to ensure equal distribution of water flow on both sides of the cooling tower, minimize the amount of existing cooling tower renovation work, and reduce the total pipeline resistance of the cooling water system.

[0012] 2. Technical Solution

[0013] To solve the above problems, the present invention adopts the following technical solution.

[0014] The hydraulic balance regulating device for parallel cooling tower groups includes:

[0015] The housing has an inlet channel for cooling circulating water to enter, at least two outlet channels for cooling circulating water to exit, and a static pressure distribution chamber connecting the inlet channel and the outlet channel;

[0016] A flow divider plate is centrally fixed inside the static pressure flow divider cavity, and abuts against the top and bottom walls of the static pressure flow divider cavity respectively, so as to divide the static pressure flow divider cavity into at least two flow divider cavities of equal volume.

[0017] The water inlet channel includes a first end and a second end. The first end extends into the static pressure diversion cavity and is arranged such that at least a portion of the first end is inclined toward the top wall of the static pressure diversion cavity. The end of the first end is closed and an overflow port is provided at its top. The diversion plate passes through the first end and divides the overflow port into several outlets. Each outlet is connected to a diversion cavity, and each diversion cavity is connected to a water outlet channel.

[0018] In a further optional technical solution, the highest point of at least two water outlet channels is lower than the lowest point of the water inlet channel.

[0019] In a further optional technical solution, the radial cross-sectional area of ​​the static pressure diversion cavity is 1.5 times or more larger than the water inlet projection cross-sectional area of ​​the water inlet channel.

[0020] In a further optional technical solution, the projected cross-sectional area of ​​the overflow outlet is less than or equal to the cross-sectional area of ​​the inlet channel, and the lowest point of the overflow outlet is not lower than one-third of the position below the highest point of the inlet channel.

[0021] In a further optional technical solution, the projected cross-sectional area of ​​the water outlet channel is equal to or similar to the projected cross-sectional area of ​​the water inlet of any diversion cavity.

[0022] In a further optional technical solution, at least two water outlet channels are opened at the same height on the static pressure diversion cavity, and the height of at least two water outlet channels on the static pressure diversion cavity is not higher than one-third of the radial height of the static pressure diversion cavity.

[0023] In a further optional technical solution, the vertical height between the top wall of the static pressure diversion cavity and the water inlet channel is not less than the radius of the water inlet channel.

[0024] As a second aspect of this application, a parallel cooling tower group is provided, including a main inlet pipe, at least two cooling tower units, and a hydraulic balance regulating device for the parallel cooling tower group as described in any of the preceding claims, wherein one end of the inlet channel is connected to the main inlet pipe, and the outlet channels are respectively connected to the inlets of the cooling tower units.

[0025] 3. Beneficial effects

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] (1) By arranging the first end so that at least a portion of it is inclined toward the top wall of the static pressure distribution cavity, the lowest point of the end of the water inlet channel extending into the static pressure distribution cavity is not lower than the highest point of the other end of the water inlet channel. This ensures that the water inlet of the static pressure distribution cavity is always higher than the water outlet of the main water inlet pipe. At this time, regardless of whether the water inlet pipes on both sides of the open crossflow cooling tower are connected by a single water inlet pipe to the tower and then split into two pipes to the water inlets of the two sides of the tower tray, or whether the two sides are connected by independent water inlet pipes to the water inlets of the tower tray, even if the water inlet pipe of the cooling tower unit is full during operation, the reverse negative pressure siphon effect will not occur because the siphon condition is destroyed, thus avoiding the occurrence of dominant jet.

[0028] (2) This invention utilizes a diverter plate passing through the first end to equally divide the overflow outlet into several outlets. Each outlet is connected to a diverter chamber, and each diverter chamber is connected to an outlet channel, thereby ensuring equal water flow distribution on both sides of the cooling tower. The projected cross-sectional area of ​​the overflow outlet is less than or equal to the cross-sectional area of ​​the inlet channel. The lowest point of the overflow outlet is not lower than one-third of the height of the inlet channel, ensuring that the horizontal inlet turns into an upward outlet, forming overflow water. The inlet channel has a small water volume, and the outlet channel has a low flow velocity; the inlet channel has a large water volume, and the outlet channel has a high flow velocity. Compared to conventional operating conditions, the entire system only requires the addition of a hydraulic balance adjustment device, and the amount of engineering work required to modify the existing cooling tower is also small, which can meet the water balance design requirements.

[0029] (3) On the one hand, the first end is arranged such that at least a portion of it is inclined toward the top wall of the static pressure diversion cavity. On the other hand, it ensures that the highest point of at least two water outlet channels is lower than the lowest point of the water inlet channel, and at the same time ensures that the radial cross-sectional area of ​​the static pressure diversion cavity is 1.5 times or more than 1.5 times the water inlet projection cross-sectional area of ​​the water inlet channel. Especially under low flow conditions, by utilizing the water outlet at the top of the water inlet channel and the air in the upper part of the cavity, an incomplete cavity can be formed in the static pressure diversion cavity, thus eliminating the resistance problem caused by the siphon effect between the water inlet and outlet channels and greatly reducing the water inlet pressure of the system. Attached Figure Description

[0030] Figure 1 This is a perspective view of the hydraulic balance regulating device for the interconnected cooling tower group in this application.

[0031] Figure 2 This is a front view of the hydraulic balance regulating device for the interconnected cooling tower group in this application;

[0032] In the diagram: 100, water inlet channel; 110, overflow outlet; 200, water outlet channel; 300, static pressure diversion chamber; 400, diversion plate. Detailed Implementation

[0033] In the following description, several terms will be used, which should be defined as having the following meanings.

[0034] Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” include plural references.

[0035] Unless otherwise indicated, approximate language as used herein, such as “generally,” “substantially,” and “about,” indicates, as will be recognized by one of ordinary skill in the art, that such modified terms may apply only to approximations, not absolute or perfect degrees. Therefore, values ​​modified by one or more terms (such as “about,” “approximately,” and “substantially”) are not limited to the specified precise values. In at least some cases, approximate language may correspond to the precision of the instrument used to measure the value. Scope limitations can be identified herein and throughout the specification and claims. Unless otherwise indicated by context or language, these scopes may be combined and / or interchanged, and include all subscopes contained herein.

[0036] In addition, unless otherwise indicated, the terms “first,” “second,” etc., are used merely as punctuation and are not intended to impose any order, position, or hierarchy requirements on the items referred to by these terms. Furthermore, for example, a reference to an item “second” does not require or exclude the existence of an item such as “first” or a lower number, or an item such as “third” or a higher number.

[0037] The present invention will now be further described with reference to specific embodiments and accompanying drawings.

[0038] Example 1

[0039] like Figures 1-2 As shown in one embodiment of this application, a hydraulic balance regulating device for a parallel cooling tower group is provided, including a shell and a flow divider 400.

[0040] The casing has an inlet channel 100 for cooling circulating water to enter, at least two outlet channels 200 for cooling circulating water to exit, and a static pressure diversion chamber 300 connecting the inlet channel 100 and the outlet channels 200. Since the hydraulic balance regulating device in this embodiment is generally applied to a single tower, in a preferred embodiment, two outlet channels 200 are provided.

[0041] The water inlet channel 100 includes a first end and a second end. The first end extends into the static pressure distribution chamber 300, and the second end is connected to the main water inlet pipe through a connecting flange. The main water inlet pipe refers to the main water inlet pipe of the open crossflow cooling tower. The static pressure distribution chamber 300 is defined by the shell.

[0042] The flow divider 400 is centrally fixed within the static pressure flow divider 300, meaning it is located along the longitudinal axis of the static pressure flow divider 300. It abuts against the top and bottom walls of the static pressure flow divider 300, dividing it into at least two substantially equal-sized flow dividers. This means that, with the aid of the flow divider 400, the two flow dividers of the static pressure flow divider 300 are not interconnected, thus enabling flow diversion.

[0043] It is worth noting that, please refer to Figure 1 .because Figure 1 The hydraulic balance regulating device shown has two outlet channels 200, which are symmetrically arranged on the housing. The diversion chamber is defined by a diversion plate 400, which is structurally shown as a rectangular plate. However, in a modified design, the diversion plate 400 may not be rectangular. For example, when the two outlet channels 200 are designed adjacent to each other on the housing, the diversion plate 400 can be adapted to fit the design.

[0044] Specifically, the first end is arranged such that at least a portion of it is inclined toward the top wall of the static pressure diversion cavity 300; for example, please refer to Figure 1 The end of the first end is arranged as an upwardly inclined cut; it can be understood that the first end can also be arranged as an entire upwardly inclined manner, that is, from the position where the water inlet channel 100 extends into the static pressure diversion cavity 300 to the end of the first end, the water inlet channel 100 is inclined toward the top wall of the static pressure diversion cavity 300.

[0045] The first end is closed at one end, and an overflow port 110 is provided at the top of the first end. When the water inlet channel 100 is full of water, the cooling circulating water can flow from the water inlet channel 100 into the static pressure diversion chamber 300 through the overflow port 110.

[0046] The diversion plate 400 passes through the first end and equally divides the overflow port 110 into several outlets. Each outlet is connected to a diversion cavity, and each diversion cavity is connected to an outlet channel 200.

[0047] Since the first end is arranged such that at least a portion of it is inclined toward the top wall of the static pressure distribution cavity 300, the lowest point of the end of the water inlet channel 100 extending into the static pressure distribution cavity 300 is not lower than the highest point of the other end of the water outlet channel 200. This ensures that the water inlet of the static pressure distribution cavity 300 is always higher than the water outlet of the main water inlet pipe. At this time, regardless of whether the water inlet pipes on both sides of the open crossflow cooling tower (i.e., the cooling tower unit) are connected by a single water inlet pipe to the tower and then split into two branches to the water inlets of the two trays on both sides, or whether the two sides are connected by independent water inlet pipes to the water inlets of the trays on both sides, even if the water inlet pipe of the cooling tower unit is full during operation, the reverse negative pressure siphon effect will not occur because the siphon conditions are broken, thus avoiding the occurrence of a dominant jet.

[0048] In this embodiment, the cavity of the static pressure diversion cavity 300 is a cylindrical cavity. However, the shape of the static pressure diversion cavity 300 is not limited to this. The cylindrical cavity limitation can minimize the collision between the cooling circulating water and the shell after the cooling circulating water enters the static pressure diversion cavity 300, thereby avoiding power loss and reducing the water inlet pressure of the water inlet channel 100.

[0049] Since the water inlet channel 100 is directly connected to the static pressure distribution chamber 300 and one end of it extends into the static pressure distribution chamber 300, the projected cross-sectional area of ​​the water inlet of the static pressure distribution chamber 300 is at least greater than or equal to the projected cross-sectional area of ​​the water inlet channel 100. In this case, the static pressure distribution chamber 300 can function as a water storage chamber, thereby slowing down the flow rate of the cooling circulating water and, to some extent, preventing the cooling circulating water from forming eddies within the static pressure distribution chamber 300 after entering it.

[0050] For the cooling circulating water, the cooling circulating water first enters the inlet channel 100 through the second end of the inlet channel 100. After a period of time, the water level in the inlet channel 100 continuously rises and eventually fills the pipe. When the pipe is full, the cooling circulating water flows through the overflow port 110 to two branching chambers and finally flows out from the outlet channels 200 on the two branching chambers. In this embodiment, the water outlet projection cross-sectional area of ​​the outlet channel 200 is equal to or close to the water inlet projection cross-sectional area of ​​any branching chamber to ensure the balance of water inflow on both sides of the open crossflow cooling tower.

[0051] Example 2

[0052] In actual operation, the flow rate of cooling water in the cooling tower fluctuates in real time. When the cooling water flow rate in the inlet channel 100 is low, the static pressure distribution chamber 300 is never full. At low flow rates, the cooling water volume in the static pressure distribution chamber 300 is small, so it will not fill completely. Under gravity, the cooling water automatically flows out from the outlet channel 200. However, as the flow rate increases, the static pressure distribution chamber 300 gradually fills. At this point, a continuous water flow is formed from the inlet channel 100 to the outlet channel 200 for the entire distribution device. Obviously, a negative pressure siphon effect is easily generated in the static pressure distribution chamber 300, causing resistance to the cooling water and increasing the total resistance of the pipeline.

[0053] Based on this, this embodiment provides a hydraulic balance regulating device for a series cooling tower group, which is basically the same as that in Embodiment 1. The difference is that the radial cross-sectional area of ​​the static pressure diversion cavity 300 is 1.5 times or more than 1.5 times the inlet projected cross-sectional area of ​​the water inlet channel 100. Preferably, it is 3 times. As described above, by limiting the radial cross-sectional area of ​​the static pressure diversion cavity 300 to be 1.5 times or more than 1.5 times the inlet projected cross-sectional area of ​​the water inlet channel 100, especially under low flow conditions, by utilizing the upper outlet of the water inlet channel 100 and the air in the upper part of the cavity, an incomplete cavity can be formed in the static pressure diversion cavity 300, thereby eliminating the resistance problem caused by the siphon effect between the inlet and outlet channels 200 and greatly reducing the inlet water pressure of the system.

[0054] Example 3

[0055] This embodiment provides a hydraulic balance regulating device for a series cooling tower group, which is basically the same as that in Embodiment 1. The difference is that the highest point of at least two outlet channels 200 is lower than the lowest point of the inlet channel 100. As mentioned above, the static pressure diversion chamber 300 in this application serves two purposes: firstly, to divert water, and secondly, to eliminate the jet siphon effect. Regarding the second point, in order to overcome the jet siphon effect caused by the static pressure diversion chamber 300, especially under low flow conditions, an important condition is that air must always be present in the upper part of the static pressure diversion chamber 300. In this embodiment, by ensuring that the highest point of the outlet channel 200 is lower than the lowest point of the inlet channel 100, air can always be present in the upper part of the static pressure diversion chamber 300 under low flow conditions, thereby further ensuring the elimination of the jet siphon effect.

[0056] Example 4

[0057] This embodiment provides a hydraulic balance regulating device for a series cooling tower group, which is basically the same as that in Embodiment 3. The difference is that the two water outlets are opened at the same height on the static pressure distribution chamber 300, and the height of the two water outlets on the static pressure distribution chamber 300 is no higher than one-third of the radial height of the static pressure distribution chamber 300. This ensures that there is always air in the upper part of the static pressure distribution chamber 300.

[0058] Example 5

[0059] This embodiment provides a hydraulic balance regulating device for a series cooling tower group, which is basically the same as that in Embodiment 3. The difference is that the projected cross-sectional area of ​​the overflow outlet 110 is less than or equal to the cross-sectional area of ​​the inlet channel 100. The lowest point of the overflow outlet 110 is not lower than one-third of the position below the highest point of the inlet channel 100. Preferably, the overflow outlet is flush with or slightly higher than the highest point of the inlet channel 100, ensuring that the horizontal inlet turns into an upward outlet, forming overflow water. The projected cross-sectional area of ​​the overflow outlet 110 is adjusted and manufactured according to the required minimum flow rate variation range.

[0060] Example 6

[0061] This embodiment provides a hydraulic balance regulating device for a series cooling tower group, which is basically the same as that in Embodiment 1. The difference is that the vertical height between the top wall of the static pressure diversion chamber 300 and the water inlet channel 100 is not less than the radius of the water inlet channel 100. In the technical solution provided by this specific embodiment, it is obvious that, since the water inlet channel 100 extends directly into the static pressure diversion chamber 300 compared to the conventional water inlet pipe, from a dynamic perspective, the cooling circulating water partially flows back and overflows in the water inlet channel 100, and then flows out from the outlet pipe through the static pressure diversion chamber 300; if the vertical height between the top wall of the static pressure diversion chamber 300 and the water inlet channel 100 is too small, the static pressure diversion chamber 300 is prone to filling, and the inlet and outlet water siphon effect is likely to occur. By limiting the vertical height between the top wall of the static pressure distribution cavity 300 and the inlet channel 100 to be no less than the radius of the inlet channel 100, preferably, the vertical height between the top wall of the static pressure distribution cavity 300 and the inlet channel 100 is approximately equal to the radius of the inlet channel 100. This avoids the static pressure distribution cavity 300 becoming empty, causing the system to idle; and it also allows the siphon effect of the inlet and outlet water when the static pressure distribution cavity 300 is full to counteract the influence of gravity on the cooling water flow rate caused by the inlet channel 100's inclination towards the top wall of the static pressure distribution cavity 300, thus making the distribution of cooling water on both sides as close as possible or equal.

[0062] Example 7

[0063] A parallel cooling tower group includes a main inlet pipe, at least two cooling tower units, and a hydraulic balance regulating device for the parallel cooling tower group as described in any one of Embodiments 1 to 6. One end of the inlet channel 100 is connected to the main inlet pipe, and the outlet channels 200 are respectively connected to the inlets of the cooling tower units.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A hydraulic balance regulating device for parallel cooling tower groups, characterized by: include: The housing has an inlet channel for cooling circulating water to enter, at least two outlet channels for cooling circulating water to exit, and a static pressure distribution chamber connecting the inlet channel and the outlet channel; A flow divider plate is centrally fixed inside the static pressure flow divider cavity, and abuts against the top and bottom walls of the static pressure flow divider cavity respectively, so as to divide the static pressure flow divider cavity into at least two flow divider cavities of equal volume. The water inlet channel includes a first end and a second end. The first end extends into the static pressure diversion cavity and is arranged such that at least a portion of the first end is inclined toward the top wall of the static pressure diversion cavity. The end of the first end is closed and an overflow port is provided at its top. The diversion plate passes through the first end and divides the overflow port into several outlets. Each outlet is connected to a diversion cavity, and each diversion cavity is connected to a water outlet channel. The highest point of at least two outlet channels is lower than the lowest point of the inlet channel.

2. The hydraulic balance regulating device for parallel cooling tower groups according to claim 1, characterized in that: The radial cross-sectional area of ​​the static pressure diversion cavity is more than 1.5 times larger than the water inlet projection cross-sectional area of ​​the water inlet channel.

3. The hydraulic balance regulating device for parallel cooling tower groups according to claim 1, characterized in that: The cross-sectional area of ​​the overflow outlet is less than or equal to the cross-sectional area of ​​the inlet channel, and the lowest point of the overflow outlet is not lower than one-third of the position below the highest point of the inlet channel.

4. The hydraulic balance regulating device for parallel cooling tower groups according to claim 1, characterized in that: The projected cross-sectional area of ​​the water outlet channel is equal to or similar to the projected cross-sectional area of ​​the water inlet of any diversion cavity.

5. The hydraulic balance regulating device for parallel cooling tower groups according to claim 1, characterized in that: At least two water outlet channels are opened at the same height in the static pressure diversion cavity, and the height of at least two water outlet channels in the static pressure diversion cavity is not higher than one-third of the radial height of the static pressure diversion cavity.

6. The hydraulic balance regulating device for parallel cooling tower groups according to claim 1, characterized in that: The vertical height between the top wall of the static pressure diversion chamber and the water inlet channel is not less than the radius of the water inlet channel.

7. A parallel cooling tower group, comprising a main inlet pipe, at least two cooling tower units, and a hydraulic balance regulating device for the parallel cooling tower group as described in any one of claims 1 to 6, characterized in that: One end of the water inlet channel is connected to the main water inlet pipe, and the water outlet channels are respectively connected to the water inlets of the cooling tower units.

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