Open multi-pipe variable flow self-regulating water balance device

Abstract

The present invention discloses an open multi-pipeline variable flow self-regulating water balancing device, which belongs to the field of hydraulic balance regulation technology. It includes a shell, the interior of the shell defines a static pressure diversion chamber; a water inlet channel, one end of which extends into the static pressure diversion chamber, including a water inlet pipe section and a steering pipe section; the steering pipe section includes: a steering outer pipe; and a steering inner pipe, the size of the steering inner pipe is slightly smaller than the steering outer pipe, and one end of the steering inner pipe is movably connected to the steering outer pipe so that the steering inner pipe can protrude outside the circumference of the steering outer pipe or retract inside the circumference of the steering outer pipe. An open multi-pipeline variable flow self-regulating water balancing device of the present invention can realize self-powered self-balancing adjustment and distribution of water output of each pipeline under complex variable flow conditions, eliminating the impact of uneven open water output on system energy efficiency and operation management; it can also eliminate the impact of shutdown water hammer on the pipeline system and equipment, and reduce a large amount of water resource waste due to shutdown overflow.

Description

Technical Field

[0001] The present invention belongs to the technical field of centralized central air-conditioning hydraulic balance regulation, and more specifically, relates to an open multi-pipeline variable flow self-regulating hydraulic balance device. Background Art

[0002] In a mechanically ventilated open cross-flow cooling tower, the cooling tower fan is located at the top center of the tower, with independent water inlet and sprinkler trays and heat dissipation packing on either side. Cooling circulating water enters the sprinkler tray from the top and is sprayed onto the heat dissipation packing through the diffuser nozzles on the sprinkler tray. After cooling, the water flows through the water collection basin at the bottom of the cooling tower and flows out through the outlet. Cooling air flows in horizontally from the heat dissipation packing inlets on both sides, and after contact with the hot water flowing through the packing to produce evaporative heat exchange, the hot air is extracted from the fan at the top center of the cooling tower. This type of open cross-flow cooling tower is characterized by cooling water flowing from top to bottom, cooling air flowing in horizontally on both sides, and air outlet at the top; independent water inlet, air inlet, and evaporative heat exchange on both sides, and the hot air is extracted by the axial flow fan at the top center after converging.

[0003] In large-scale commercial and industrial cooling systems, mechanically drafted open-circuit crossflow cooling towers are often used in parallel configurations, as cooling loads vary with actual conditions. These systems often have multiple outlet pipes. These parallel systems can be prone to imbalanced water flow due to factors such as pipe head resistance, siphon effect, pipe routing, and flow rate variations. This can lead to deviations in the cooling tower's thermal performance and affect system efficiency.

[0004] In open crossflow cooling towers, the water inlet connections on both sides are typically split into two pipes, one connected to the tower and then split into two pipes connected to the tower tray inlets. Alternatively, each pipe has its own independent inlet connection to the tower tray inlets. The inlet pipe is typically higher than the inlet, and the horizontal inlet pipe requires an elbow to connect downward to the inlet. A valve is installed before the inlet to regulate the water flow and facilitate maintenance. Because the inlet pipes are separate and higher than the inlet, the outlet is an open, zero-resistance space. During operation, if any inlet pipe is initially full, then water discharges downward, creating a negative pressure siphon effect in the reverse direction, resulting in a dominant jet flow. This causes the water flow at the other outlet to be significantly lower than the dominant outlet, resulting in uneven water flow distribution between the inlets on both sides of the cooling tower. This phenomenon is not fixed but varies with the cooling water flow rate and cannot be eliminated by adjusting the pipe valves. In severe cases, water flow may flow from one side while no flow flows from the other. This situation is particularly severe in systems with multiple cooling towers.

[0005] When the water inflow on both sides of an open cross-flow cooling tower is unbalanced, the water film on the packing on both sides of the cooling tower will be of varying thickness, or some packing will have water film while others will not. The air inlet resistance is greater where the water film is thicker, and smaller where the water film is thinner or there is no water film. This results in lower air flow where the water film is thicker and higher air flow where the water film is thinner or there is no water film, seriously affecting the evaporative heat dissipation performance of the cooling tower.

[0006] To ensure consistent water flow across all pipelines, valves in outlet pipes with higher flow rates need to be closed. Adjusting the valves when system flow is high will result in a loss of balanced distribution when flow is low. The valve opening is small when balancing low flow. As system load and flow increase, the management head resistance increases, leading to high energy consumption in the system's circulation and distribution. However, the system load fluctuates year-round and complex operating conditions make real-time adjustments to valve openings impossible.

[0007] In response to the above problems, the mainstream strategy currently adopted is to achieve real-time monitoring and adjustment through a balancing valve to achieve the goal of ensuring hydraulic balance. In one feasible solution, an electric regulating valve with controllable opening can be used to achieve real-time monitoring and adjustment. For example, the Chinese invention patent with application number CN202110020078.X and application date January 7, 2021 discloses a dynamic cooling tower group water system hydraulic balance adjustment method and system, based on the real-time cooling water circulation pump, the operating status and frequency of each cooling tower, the cooling tower group cooling water main supply pipe pressure PG, the cooling tower group cooling water branch pipe water supply pressure (PG-1, PG-2, ..., PG-m, where m represents the total number of cooling tower group branches), each cooling tower water supply branch pipe pressure (P1-1, P1-2, The system monitors and collects data such as (..., P1-n, ..., Pm-1, Pm-2, ..., Pm-n, where m represents the total number of cooling tower branch pipes and n represents the total number of cooling water supply branches within each branch pipe). The system analyzes the difference ΔP between the pressure of each cooling tower water distribution branch pipe and the pressure of the total cooling water supply pipe for the cooling tower group (i.e., the difference between PG and Pm-n). This is followed by data comparison in the "state storage database," and the proportional-integral-differential method is used to adjust the opening of the electric control valve. This cycle continues with data collection and imbalance rate calculation until the imbalance rate reaches the preset target. This ensures that each operating cooling tower meets the hydraulic balance requirements between the cooling tower water distribution branches while maintaining the dynamic operation of the system. For example, the Chinese utility model patent with application number CN201821119806.2 and application date July 16, 2018, discloses an industrial flow balancing system, including a cooling tower, a circulating water pump, an industrial hydraulic balancing device, a distillation tower, an electric regulating valve, a longitudinal co-flow pipe, a pressure sensor P, and a temperature sensor T. The utility model can adjust the flow balance of the industrial circulation system when there are more than one distillation tower device. A longitudinal co-flow structure is adopted, and the diameter of the co-flow pipe network is calculated through a calculation formula to determine the actual flow demand. According to the flow balance of the distillation tower device and the current operating load, the opening of the electric regulating valve is adjusted and controlled in real time; it completely solves the problems of unbalanced industrial cooling water flow, which leads to large system redundancy, high system energy consumption, large energy loss, and low product quality.

[0008] However, the above-mentioned method of using an electric regulating valve with controllable opening to achieve real-time monitoring and adjustment is expensive, and the efficiency of equipment operation is also low; and during the installation and implementation process, whether for existing buildings or new buildings, the engineering workload and renovation difficulty are large.

[0009] Another possible solution is to use a mechanical hydraulic balancing mechanism to regulate the uniform flow of industrial cooling water. For example, the Chinese utility model patent application number CN201520842225.1, filed on October 28, 2015, discloses an open-circulating cooling water energy-saving system with a hydraulic balancing mechanism, comprising a connecting pipe for transmitting circulating water and a heat exchanger, a cooling tower, and a cooling water pump connected in sequence by the connecting pipe along the direction of the circulating water flow. The circulating cooling water system is provided with a hydraulic balancing mechanism, and the cooling water pump is a variable-operating cooling water pump. This utility model can eliminate some ineffective cooling flow by rationally solving the hydraulic balance of the open-circulating cooling water system, and is equipped with a variable-operating cooling water pump that adapts to the system to reduce energy consumption, thereby achieving energy conservation in the open-circulating cooling water system. However, the design of the mechanical hydraulic balancing mechanism increases the total pipe resistance of the cooling water system, which not only places higher requirements on the head of the cooling water circulating pump, but also has a certain impact on the overall energy conservation of the system.

[0010] To sum up, how to provide an open multi-pipeline variable flow self-regulating water balancing device that automatically responds to changes in operating conditions under complex variable conditions of system load and flow, and self-adjusts the valve opening to balance the imbalance in the distribution of water inlet to the sprinkler plates on both sides of the water outlet between each pipeline, and ensure the evaporative cooling thermal performance of the multi-cooling tower parallel system under complex variable conditions of the cooling circulating water system is a technical problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0011] 1. Problems to be solved

[0012] In view of the problems existing in the prior art, the present invention provides an open multi-pipeline variable flow self-regulating water balancing device.

[0013] 2. Technical solution

[0014] To solve the above problems, the present invention adopts the following technical solutions.

[0015] The open multi-pipe variable flow self-regulating water balancing device is installed in the cooling tower water inlet pipe, including:

[0016] a housing, wherein a static pressure diversion chamber is defined in the interior of the housing;

[0017] The water inlet channel has one end extending into the static pressure diversion cavity, and includes a water inlet pipe section and a diverting pipe section; the water inlet pipe section is connected to the cooling tower water inlet pipe for the inflow of cooling circulating water; the diverting pipe section is connected to the water inlet pipe section for diverting the horizontal inflow of water in the water inlet pipe section to discharge water upward, and the water outlet height of the upward discharge is not less than one-third below the highest point of the water inlet pipe section;

[0018] The steering tube section comprises:

[0019] Turning to the outer tube; and

[0020] An inner steering tube, the inner steering tube being slightly smaller than the outer steering tube, one end of the inner steering tube being movably connected to the outer steering tube so that the inner steering tube can protrude outside the circumference of the outer steering tube or retract inside the circumference of the outer steering tube; the inner steering tube comprising:

[0021] The water retaining surface is perpendicular to the water inlet direction of the steering inner pipe and is used to withstand the water pressure of the cooling circulating water during use;

[0022] Multiple water outlet surfaces, each of which is equipped with several special-shaped variable-section water outlets;

[0023] The water retaining surface and the plurality of water outlet surfaces jointly define the turning inner tube;

[0024] When the flow rate of cooling circulating water in the steering inner tube increases, the water retaining surface drives the steering inner tube to move toward the direction protruding outside the circumference of the steering outer tube under the action of the water pressure of the cooling circulating water, so as to increase the water outlet area of the multiple water outlet surfaces; when the flow rate of cooling circulating water in the steering inner tube decreases, the steering inner tube moves toward the direction contracting inside the circumference of the steering outer tube, so as to reduce the water outlet area of the multiple water outlet surfaces.

[0025] Preferably, the pipe section on the steering inner tube with an arc angle greater than 45° and less than 90° is an adjustment pipe section, and the special-shaped variable-section water outlet is arranged at the adjustment pipe section position of the steering inner tube.

[0026] Preferably, the size of the water retaining surface is slightly larger than the circumference of the turning outer tube, so that when the turning inner tube is retracted inside the circumference of the turning outer tube, the water retaining surface and the circumference of the turning outer tube are horizontally overlapped.

[0027] Preferably, the effective flow projection cross-sectional area of the static pressure diversion cavity is 1.5 times or more than 1.5 times greater than the water inlet projection cross-sectional area of the water inlet channel.

[0028] Preferably, it also includes:

[0029] A water outlet pipe is provided on the shell and is connected to the static pressure diversion cavity;

[0030] The highest point of the water outlet of the water outlet pipe is lower than the highest point of the turning outer pipe.

[0031] Preferably, the vertical height between the top surface of the static pressure diversion chamber and the water outlet surface of the turning outer tube is greater than the radius of the water inlet channel, and a certain amount of gas is always maintained at the top of the static pressure diversion chamber.

[0032] Preferably, a baffle is further provided in the static pressure diversion cavity; the baffle is used to limit the movement of the steering inner tube when the steering inner tube is fully extended from the circumference of the steering outer tube.

[0033] 3. Beneficial effects

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] In the open multi-pipe water outlet system of the present invention, under the condition that the diameter and height of each water inlet are consistent, each water outlet pipeline is equipped with an open multi-pipe variable flow self-adjusting water balancing device, which can realize self-powered self-balancing adjustment and distribution of water outlet of each pipeline under complex variable flow conditions, eliminating the impact of uneven water flow of open water outlet on system energy efficiency and operation management; it can also eliminate the impact of shutdown water hammer on the pipeline system and equipment, and reduce a large amount of water resource waste due to shutdown overflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the overall structure of an open multi-pipe variable flow self-regulating water balancing device in one embodiment of the present invention;

[0037] Figure 2 This is a front view of an open multi-pipe variable flow self-regulating water balancing device in one embodiment of the present invention;

[0038] Figure 3 Schematic diagram of the steering pipe structure in one embodiment of the present invention;

[0039] In the figure: 100, static pressure diversion chamber; 200, water inlet channel; 210, water inlet pipe section; 220, steering pipe section; 221, steering outer pipe; 222, steering inner pipe; 2221, water retaining surface; 2222, water outlet surface; 300, water outlet pipe; limit baffle, 400. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0042] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "mounted" and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0043] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0044] This embodiment provides an open multi-pipe variable flow self-regulating water balance device, which is installed in the cooling tower water inlet pipe. Figures 1 to 3 Shown, including:

[0045] A housing, wherein a static pressure diversion chamber 100 is defined in the interior of the housing;

[0046] The water inlet channel 200 extends into the static pressure diversion chamber 100 at one end and includes a water inlet pipe section 210 and a diverting pipe section 220. The water inlet pipe section 210 is connected to the cooling tower water inlet pipe for the inflow of cooling circulating water. The diverting pipe section 220 is connected to the water inlet pipe section 210 for diverting the horizontal inflow of water in the water inlet pipe section 210 to discharge water upward.

[0047] The steering tube section 220 includes:

[0048] Turning to outer tube 221; and

[0049] The inner steering tube 222 is slightly smaller than the outer steering tube 221. One end of the inner steering tube 222 is movably connected to the outer steering tube 221 so that the inner steering tube 222 can protrude outside the circumference of the outer steering tube 221 or retract inside the circumference of the outer steering tube 221. The inner steering tube 222 includes:

[0050] The water retaining surface 2221 is perpendicular to the water inlet direction of the steering inner tube 222 and is used to withstand the water pressure of the cooling circulating water during use;

[0051] Multiple water outlet surfaces 2222, each of which is provided with a plurality of special-shaped variable-section water outlets;

[0052] The water retaining surface 2221 and the plurality of water outlet surfaces 2222 jointly define the inner turning tube 222;

[0053] When the flow rate of cooling circulating water in the steering inner tube 222 increases, the water retaining surface 2221 drives the steering inner tube 222 to move toward the outer side of the circumference of the steering outer tube 221 under the action of the water pressure of the cooling circulating water, so as to increase the water outlet area of the multiple water outlet surfaces 2222; when the flow rate of cooling circulating water in the steering inner tube 222 decreases, the steering inner tube 222 moves toward the inner side of the circumference of the steering outer tube 221 to reduce the water outlet area of the multiple water outlet surfaces 2222.

[0054] Specifically, the open multi-pipe variable flow self-regulating water balancing device in this embodiment can be arranged in front of each cooling tower water inlet pipe of multiple cooling towers and multiple water inlet pipes. Each water inlet pipe is horizontally connected to the water inlet pipe section 210 of the self-regulating water balancing device through a flange. Obviously, at this time, the cooling circulation water level in the water inlet pipe section 210 is horizontally inlet.

[0055] In conventional open cross-flow cooling towers, the water inlet pipe is usually higher than the water inlet. The horizontal water inlet pipe requires an elbow to connect downward to the water inlet, and a valve must be installed in front of the water inlet to adjust the water inlet and for maintenance and inspection. Since the water inlet pipes are independent, the water inlet pipe is higher than the water inlet, and the water outlet is an open zero-resistance space. During operation, any water inlet pipe is first in a full pipe state. After the water is discharged downward, a negative pressure siphon effect is generated in the reverse direction, forming a dominant jet state, causing the water flow at the other outlet to be much lower than the water flow at the dominant outlet, resulting in uneven water flow distribution on both sides of the cooling tower. This phenomenon is not a fixed state and changes with the cooling circulation water volume. It cannot be eliminated by adjusting the pipeline valves. In severe cases, some pipes will have water flowing out, while others will have no water flow.

[0056] In this embodiment, a diverting pipe section 220 is provided, which is connected to the water inlet pipe section 210, thereby diverting the horizontal water inflow in the water inlet pipe section 210 to discharge upward. The water outlet height of the upward discharge is no less than one-third below the highest point of the water inlet pipe section 210. In this way, 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 siphoning conditions are destroyed, thus avoiding the situation of dominant jet.

[0057] In this embodiment, both the outer steering tube 221 and the inner steering tube 222 are arc-shaped tubes, both having a 90° arc turn. The inner steering tube 222 is slightly smaller than the outer steering tube 221, so that when the inner steering tube 222 is inserted into the outer steering tube 221, a small gap is left between the outer wall of the inner steering tube 222 and the inner wall of the outer steering tube 221, ensuring that the inner steering tube 222 can always move freely relative to the outer steering tube 221.

[0058] In this embodiment, one end of the inner steering tube 222 is movably connected to the outer steering tube 221, enabling the inner steering tube 222 to protrude outside the outer steering tube 221 or retract inside the outer steering tube 221. In a more specific embodiment, a movable shaft is provided at the center of the inner steering tube 222's movement, where it does not collide with the outer steering tube 221. A sleeve is provided on the outer wall of the outer steering tube 221, coinciding with the movable shaft of the inner steering tube 222, to support the rotational movement of the movable shaft. A booster spring is provided between the movable shaft and the outer steering tube 221, with the booster spring force being less than the total weight of the moment arm between the inner steering tube 222 and the steering shaft core in a horizontal position. It should be understood that in this embodiment, the inner steering tube 222 is only required to be able to move relative to the outer steering tube 221 between protruding outside the outer steering tube 221 and retracting inside the outer steering tube 221. Therefore, the specific connection method between the inner steering tube 222 and the outer steering tube 221 is not limited.

[0059] It should be noted that the outer circumference of the steering outer tube 221 in the above embodiment refers to the circumference of the steering outer tube 221 close to the steering inner tube 222 , and this circumference is also the water outlet surface 2222 of the steering outer tube 221 .

[0060] In this embodiment, the water retaining surface 2221 and the multiple water outlet surfaces 2222 jointly define the inner steering tube 222. In a more specific embodiment, the water retaining surface 2221 is a sealing cover plate, and the size of the sealing cover plate is slightly larger than the circumference of the outer steering tube 221, so that when the inner steering tube 222 is retracted inside the circumference of the outer steering tube 221, the sealing cover plate and the circumference of the outer steering tube 221 are horizontally overlapped.

[0061] In order to prevent backflow and eliminate water hammer and overflow, an elastic sealing ring is further provided on the outer periphery of the sealing cover plate.

[0062] After the cooling circulating water undergoes the self-adjusting water balancing device in this embodiment, the water retaining surface 2221 first drives the steering inner tube 222 to move toward the direction protruding from the outer side of the circumference of the steering outer tube 221 under the action of the water pressure of the cooling circulating water, which is equivalent to pushing the steering inner tube 222 to rotate along the movable axis. At this time, the water outlet surface 2222 area of the multiple water outlets on the water outlet surface 2222 increases; when the cooling circulating water flow decreases, the steering inner tube 222 moves toward the direction contracted to the inner side of the circumference of the steering outer tube 221. At this time, the water outlet surface 2222 area of the multiple water outlets on the water outlet surface 2222 decreases.

[0063] During the above process, since the rotation angle of the steering inner tube 222 and the water outlet of the special-shaped variable-section opening can be automatically adjusted according to the water pressure, the raw water pressure of some pipelines is relatively large. After the water outlet is adjusted, the water pressure drops accordingly, and the water pressure is distributed to other pipelines, thereby balancing the flow distribution performance of multiple pipelines. Through the above process, the problem of unbalanced water inlet distribution in the sprinkler basins on both sides of the open cross-flow cooling tower can be eliminated, thereby ensuring the evaporative cooling thermal performance of the cooling tower under the complex variable working conditions of the cooling circulating water system.

[0064] In a further configuration, a baffle 400 is further provided in the static pressure diversion chamber 100 ; the baffle 400 is used to limit the movement of the steering inner tube 222 when the steering inner tube 222 is fully extended from the circumference of the steering outer tube 221 to avoid an excessively large angle.

[0065] The pipe section on the steering inner tube 222 with an arc greater than 45° and less than 90° is an adjustment pipe section, and the special-shaped variable-section water outlet is arranged at the adjustment pipe section position of the steering inner tube 222.

[0066] The size of the water retaining surface 2221 is slightly larger than the circumference of the steering outer tube 221 , so that when the steering inner tube 222 is retracted inside the circumference of the steering outer tube 221 , the water retaining surface 2221 and the circumference of the steering outer tube 221 are horizontally overlapped.

[0067] In another embodiment, the effective flow-through projected cross-sectional area of the static pressure diverter chamber 100 is 1.5 times or more greater than the water inlet projected cross-sectional area of the water inlet channel 200. In actual operating conditions, the flow rate of the cooling circulating water in the cooling tower fluctuates in real time. When the cooling circulating water in the water inlet channel 200 is flowing at a low flow rate, the static pressure diverter chamber 100 is never full. For the cooling circulating water in the static pressure diverter chamber 100, at low flow rates, the amount of cooling circulating water in the static pressure diverter chamber 100 is small and therefore not full. At this point, the cooling circulating water automatically flows out of the outlet channel under the influence of gravity. As the flow rate continues to increase, if the static pressure diverter chamber 100 gradually fills with water, a continuous flow of water forms from the water inlet channel 200 to the outlet channel for the entire diverter device. Obviously, a negative pressure siphon effect is easily generated in the static pressure diverter chamber 100, resulting in resistance to the cooling circulating water within the static pressure diverter chamber 100, thereby increasing the total resistance of the pipeline. By setting the effective flow projection cross-sectional area of the static pressure diversion chamber 100 to be 1.5 times or more than 1.5 times the water inlet projection cross-sectional area of the water inlet channel 200, it is possible to avoid negative pressure siphoning caused by a full pipe under high flow conditions, and on the other hand, to avoid the pressure of the water inlet under low flow conditions.

[0068] In another embodiment, the vertical height between the top surface of the static pressure diversion chamber 100 and the water outlet surface 2222 of the diverting outer tube 221 is greater than the radius of the water inlet channel 200, and a certain amount of gas is always maintained at the top of the static pressure diversion chamber 100. The device further includes:

[0069] The water outlet pipe 300 is provided on the housing and communicates with the static pressure diversion chamber 100;

[0070] The highest point of the water outlet of the outlet pipe 300 is lower than one-third of the position below the highest point of the turning outer tube 221, and the form of the outlet pipe 300 can be set to any angle and direction that meets the above-mentioned height requirements. As mentioned above, the static pressure diversion chamber 100 in this application plays two roles, one is water diversion, and the other is to eliminate the jet siphon effect. For the second point, in order to overcome the problem of the jet siphon effect caused by the static pressure diversion chamber 100, especially under low flow conditions, an important condition is that the air in the upper part of the static pressure diversion chamber 100 needs to be kept at all times. In this embodiment, by ensuring that the highest point of the water outlet channel is lower than the lowest point of the water inlet channel 200, it is possible to always ensure the presence of air in the upper part of the static pressure diversion chamber 100 under low flow conditions, thereby further ensuring the elimination of the jet siphon effect.

[0071] Since the water inlet channel 200 extends directly into the static pressure diversion chamber 100 compared to conventional water inlet pipes, from a dynamic perspective, the cooling circulating water partially refluxes in the water inlet channel 200, overflows, and then flows out of the water outlet pipe 300 through the static pressure diversion chamber 100; during the reflux stage, since the diverting pipe section 220 diverts the horizontal water inflow in the water inlet pipe section 210 to an upward water outlet, part of the cooling circulating water refluxes in the diverting pipe section 220, and the flow rate of the cooling circulating water will inevitably be affected, resulting in increased system resistance of the device; and when the cooling circulating water overflows and flows out of the water outlet pipe 300 through the static pressure diversion chamber 100, if the vertical height between the top wall of the static pressure diversion chamber 100 and the water inlet channel 200 is too small, the static pressure diversion chamber 100 is easily filled, and the inlet and outlet water siphon effect is likely to occur. By limiting the vertical height between the top surface of the static pressure diversion chamber 100 and the water outlet surface 2222 of the deflection outer tube 221 to be greater than the radius of the water inlet channel 200, preferably, the vertical height between the top wall of the static pressure diversion chamber 100 and the water inlet channel 200 is substantially equal to the radius of the water inlet channel 200. This allows the siphon effect of water flowing in and out of the static pressure diversion chamber 100 when the static pressure diversion chamber 100 is full to offset the effect of gravity on the cooling circulating water flow rate caused by the inclination of the water inlet channel 200 toward the top wall of the static pressure diversion chamber 100, thereby ensuring that the distribution amount of cooling circulating water on both sides is as close or equal as possible.

[0072] The examples described in the present invention are merely descriptions of the preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by engineers and technicians in this field should fall within the scope of protection of the present invention.

Claims

1. An open multi-pipe variable flow self-regulating water balancing device is installed in the cooling tower water inlet pipe, characterized by: include: a housing, wherein a static pressure diversion chamber is defined in the interior of the housing; The water inlet channel has one end extending into the static pressure diversion cavity and includes a water inlet pipe section and a diverting pipe section; The water inlet pipe section is connected to the cooling tower water inlet pipe for flowing in cooling circulating water; the diverting pipe section is connected to the water inlet pipe section for diverting the horizontal water inflow in the water inlet pipe section to discharge water upward, and the water outlet height of the upward water discharge is not less than one-third of the position below the highest point of the water inlet pipe section; The steering tube section comprises: Turning to the outer tube; and An inner steering tube, the inner steering tube being slightly smaller than the outer steering tube, one end of the inner steering tube being movably connected to the outer steering tube so that the inner steering tube can protrude outside the circumference of the outer steering tube or retract inside the circumference of the outer steering tube; the inner steering tube comprising: The water retaining surface is perpendicular to the water inlet direction of the steering inner pipe and is used to withstand the water pressure of the cooling circulating water during use; Multiple water outlet surfaces, each of which is equipped with several special-shaped variable-section water outlets; The water retaining surface and the plurality of water outlet surfaces jointly define the turning inner tube; When the flow rate of cooling circulating water in the steering inner tube increases, the water retaining surface drives the steering inner tube to move toward the direction protruding outside the circumference of the steering outer tube under the action of the water pressure of the cooling circulating water, so as to increase the water outlet area of the multiple water outlet surfaces; when the flow rate of cooling circulating water in the steering inner tube decreases, the steering inner tube moves toward the direction contracting inside the circumference of the steering outer tube, so as to reduce the water outlet area of the multiple water outlet surfaces.

2. The open multi-pipe variable flow self-regulating water balancing device according to claim 1 is characterized in that: The pipe section on the steering inner pipe with an arc angle greater than 45° and less than 90° is an adjustment pipe section, and the special-shaped variable-section water outlet is arranged at the adjustment pipe section position of the steering inner pipe.

3. The open multi-pipe variable flow self-regulating water balancing device according to claim 1, characterized in that: The size of the water retaining surface is slightly larger than the circumference of the turning outer tube, so that when the turning inner tube is retracted inside the circumference of the turning outer tube, the water retaining surface and the circumference of the turning outer tube are horizontally overlapped.

4. The open multi-pipe variable flow self-regulating water balancing device according to claim 1, characterized in that: The effective flow projection cross-sectional area of the static pressure diversion cavity is 1.5 times or more than the water inlet projection cross-sectional area of the water inlet channel.

5. The open multi-pipe variable flow self-regulating water balancing device according to claim 1, characterized in that: Also includes: A water outlet pipe is provided on the shell and is connected to the static pressure diversion cavity; The highest point of the water outlet of the water outlet pipe is lower than one-third of the highest point of the steering outer pipe.

6. The open multi-pipe variable flow self-regulating water balancing device according to claim 5, characterized in that: The vertical height between the top surface of the static pressure diversion cavity and the water outlet surface of the outer turning tube is greater than the radius of the water inlet channel, and a certain amount of gas is always maintained at the top of the static pressure diversion cavity.

7. The open multi-pipe variable flow self-regulating water balancing device according to claim 1, characterized in that: A baffle is further provided in the static pressure diversion cavity; the baffle is used to limit the movement of the steering inner tube when the steering inner tube is fully extended from the circumference of the steering outer tube.

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