Anti-overflow detection system and detection method for cooling tower equipment in cigarette factory

Abstract

The invention discloses an anti-overflow detection system and detection method for cooling tower equipment in a cigarette factory, and belongs to the technical field of anti-overflow detection. The detection system comprises a control unit and an overflow detection unit. The overflow detection unit comprises a plurality of water receiving and overflow water pipe devices and an anti-overflow device matched with the structures of the water receiving and overflow water pipe devices; the upper section of the anti-overflow device abuts against the water receiving and overflow water pipe device, and a main body part corresponding to the lower section of the anti-overflow device is located in the water receiving and overflow water pipe device. The control unit is electrically connected with the signal output end of the anti-overflow device and used for judging whether abnormal overflow exists in the cooling tower equipment or not according to the liquid level warning signal output by the anti-overflow device and related preset rules, and if yes, a corresponding overflow instruction is output to the water supplementing unit. The water level abnormity is detected in real time, so that safe and stable operation of equipment is ensured.

Description

Technical Field

[0001] The invention relates to a water overflow prevention detection system and a detection method for cooling tower equipment in a cigarette factory, belonging to the technical field of water overflow prevention detection. Background Art

[0002] Cooling tower is an important heat exchange equipment. Its main function is to achieve heat transfer and loss through direct contact between water and air, so as to achieve the purpose of lowering water temperature. In the fields of industrial production and refrigeration and air conditioning, cooling tower plays a vital role to ensure the normal operation of the system. In industrial production, cooling tower can effectively dissipate the waste heat generated, reduce water temperature and ensure the normal operation of equipment; in refrigeration and air conditioning, cooling tower plays the role of cooling refrigerant, making the cooling effect better.

[0003] There are 9 groups of cross-flow cooling towers in the power center of a cigarette factory, including 6 groups of chillers and 3 groups of air compressors. Each cooling tower is equipped with facilities such as water supply ports, ball valves, drain ports and overflow ports to ensure the stable operation of chillers and air compressors. In actual application, the cooling tower will overflow accordingly. The so-called overflow means that when the chiller or air compressor changes from the running state to the stopped state, the cooling water will flow along the packing of the cooling tower to the chassis due to the effect of gravity and flow out from the overflow port. This overflow phenomenon is normal overflow and is an inevitable result of the design of the cooling tower. By maintaining the water balance of the system, it prevents the water level from being too high or too low to cause damage to the system.

[0004] However, when the float valve is damaged, the pipe is broken or the water balance of the cooling tower is unbalanced, the cooling tower will cause abnormal overflow through abnormal water replenishment. Abnormal overflow will not only cause energy consumption due to frequent water replenishment, but also cause unstable equipment operation due to water level fluctuations, causing considerable losses to the equipment. Summary of the invention

[0005] The purpose of the present invention is to provide a water overflow prevention detection system and detection method for cooling tower equipment in a cigarette factory, aiming to achieve rapid response to abnormal water level phenomena, thereby effectively preventing the occurrence of water overflow problems in the cooling tower of the cigarette factory due to excessively high water levels.

[0006] In order to achieve the above objectives / solve the above technical problems, the present invention is implemented by adopting the following technical solutions.

[0007] In one aspect, the present invention provides a water overflow prevention detection system for cooling tower equipment in a cigarette factory, comprising: a control unit and a water overflow detection unit; The overflow detection unit comprises: a plurality of water receiving and overflowing water pipe devices, and an anti-overflow device adapted to the structure of the water receiving and overflowing water pipe devices; the upper section of the anti-overflow device abuts against the water receiving and overflowing water pipe devices, and the main body corresponding to the lower section thereof is located in the water receiving and overflowing water pipe devices; The control unit is electrically connected to the signal output end of the anti-overflow device, and is used to determine whether there is abnormal overflow in the cooling tower equipment based on the liquid level warning signal output by the anti-overflow device and related preset rules. If so, the corresponding overflow instruction is output to the water replenishment unit.

[0008] Through the anti-overflow device, the system of the present invention can monitor the water level of the cooling tower in real time to ensure that the overflow problem is discovered and handled in time. Among them, the control unit automatically judges and handles the overflow situation according to the preset rules, reducing the need for manual intervention and improving the automation and intelligence level of the system. At the same time, by responding to and handling the overflow problem in a timely manner, the system can effectively protect the cooling tower equipment from damage and prevent water from polluting the environment. Therefore, the anti-overflow detection system for cooling tower equipment in a cigarette factory provided by the present invention is an efficient and intelligent monitoring and processing system, which can effectively protect the safety of the environment and equipment while ensuring the normal operation of the equipment.

[0009] Optionally, the anti-overflow device includes: a water inlet component, a pipeline, a drainage component and a detection component; The pipeline comprises a variable diameter pipeline section and a water storage pipeline section; the water inlet piece is fixedly connected to the top of the variable diameter pipeline section, and the water inlet piece is detachably connected to the bottom of the water storage pipeline section.

[0010] Optionally, the detection assembly is used as a liquid level sensor, including: a junction box, a threaded connector, a guide rod, a float, a first fixing buckle and a second fixing buckle; One end of the guide rod is connected to the threaded connector, and the other end is located in the water storage pipe section through the middle of the water inlet member; the first fixing buckle and the second fixing buckle are fixed to the outer periphery of the bottom of the guide rod through a clamp, and a closed area for limiting the unlimited movement of the float is formed between the two buckles; the float is sleeved on the outer periphery of the guide rod and is slidably connected to the guide rod.

[0011] Optionally, the first fixing buckle corresponds to an upper limit position of the closed area, and the second fixing buckle corresponds to a lower limit position of the closed area.

[0012] Optionally, the guide rod is a non-magnetic metal guide rod, and a reed switch is installed in the non-magnetic metal guide rod at a position corresponding to the first fixing buckle; The float is hollow inside and a magnet is provided on the ring side. When the float moves to the upper limit of the closed area along with the water level, the float is attracted to the reed switch and outputs a corresponding liquid level warning signal to the control unit.

[0013] Optionally, the water inlet member is provided with a plurality of water inlets equidistantly arranged in the circumferential direction, and the drainage member is provided with a group of drainage outlets symmetrically with respect to the axis.

[0014] Optionally, the diameter corresponding to the outer contour of the water inlet member is larger than the outer contour diameter of the water receiving and overflow water pipe device.

[0015] Optionally, the anti-overflow detection system for cooling tower equipment in a cigarette factory further includes an intermediate relay, and the detection component is electrically connected to the control unit via the intermediate relay; The intermediate relay is provided with a first pair of interfaces, a second pair of interfaces, a third pair of interfaces and a fourth pair of interfaces; the first pair of interfaces and the second pair of interfaces are respectively connected to the junction box through the live wire and the neutral wire; the third pair of interfaces is connected to DV24V, and the fourth pair of interfaces is connected to the PLC DI of the control unit as an output point.

[0016] Optionally, the anti-overflow detection system for cooling tower equipment in a cigarette factory further includes an alarm module, which is electrically connected to the control end of the control unit and is used to output a corresponding first sound and light alarm signal or a second sound and light alarm signal according to the liquid level warning signal output by the detection component and related preset rules.

[0017] Optionally, judging whether there is abnormal overflow in the cooling tower equipment according to the liquid level warning signal output by the overflow prevention device and relevant preset rules includes: If the float rises to the upper limit of the closed area, the alarm module outputs a corresponding first sound and light alarm signal; After the first sound and light alarm signal is output, it is further determined whether the cooling tower equipment has just been shut down. If so, it is determined that the cooling tower equipment is overflowing normally; otherwise, it is determined that the cooling tower equipment is overflowing abnormally, and the alarm module outputs the corresponding second sound and light alarm signal.

[0018] Optionally, judging whether there is abnormal overflow in the cooling tower equipment according to the liquid level warning signal output by the overflow prevention device and related preset rules, further includes: If the float rises to the upper limit of the closed area, the alarm module outputs a corresponding first sound and light alarm signal; After the first sound and light alarm signal is output, it is first determined whether the cooling tower equipment has just been shut down. If not, it is determined that the cooling tower equipment is abnormally overflowing, and the alarm module outputs a corresponding second sound and light alarm signal; if so, it is then determined whether the first sound and light alarm signal continues to be output after a preset period of time; If it continues, it is determined that the cooling tower equipment is overflowing abnormally, and the alarm module outputs the corresponding second sound and light alarm signal; otherwise, it is determined that the cooling tower equipment is overflowing normally.

[0019] In a second aspect, the present invention further provides a method for detecting overflow prevention for cooling tower equipment in a cigarette factory, comprising: Receive the liquid level warning signal output by the overflow prevention device; According to the liquid level warning signal, controlling the alarm module to output a corresponding first sound and light alarm signal; After the first sound and light alarm signal is output, first determine whether the cooling tower equipment has just been shut down. If not, determine that the cooling tower equipment is abnormally overflowing, and control the alarm module to output a corresponding second sound and light alarm signal; if so, then determine whether the first sound and light alarm signal continues to be output after a preset period of time; If it continues, it is determined that the cooling tower equipment is overflowing abnormally, and the alarm module is controlled to output the corresponding second sound and light alarm signal; otherwise, it is determined that the cooling tower equipment is overflowing normally.

[0020] Optionally, the preset time is set to 30 minutes.

[0021] The anti-overflow detection method for cooling tower equipment in a cigarette factory provided by the present invention combines the equipment status and the liquid level warning signal, realizes intelligent overflow judgment and timely response, and provides a strong guarantee for the safe operation of the cooling tower in the cigarette factory. Among them, by combining the equipment status and the liquid level warning signal, intelligent overflow judgment is realized. Secondly, since the water level change after the equipment is shut down is specially considered, the false alarm caused by the equipment shutdown is reduced. In addition, for abnormal overflow, a serious second sound and light alarm signal can be quickly output to remind the operator to deal with it in time, and the overall practicality is strong.

[0022] Compared with the prior art, the present invention has the following beneficial effects: The present invention effectively avoids equipment damage and production interruption caused by abnormal overflow through precise water level control and real-time monitoring, and ensures the stable operation of the water replenishment pump and key equipment. The system can distinguish between normal overflow and abnormal overflow, respond in time and output corresponding instructions to the water replenishment unit, realizing intelligent overflow management. In addition, the system also optimizes the water replenishment strategy, reduces unnecessary energy consumption, and contributes to resource conservation and cost-effectiveness. Overall, the system not only significantly improves the operating efficiency and reliability of the cooling tower, but also provides a strong guarantee for the safe and efficient operation of the cooling tower in the cigarette factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure shows a schematic structural diagram of a water overflow prevention device in a water overflow prevention detection system for cooling tower equipment in a cigarette factory of the present invention; Figure 2 The figure shows the structure schematic diagram of the water inlet part in the anti-overflow detection system for cooling tower equipment in a cigarette factory of the present invention; Figure 3 The figure shows the structure schematic diagram of the water outlet part in the anti-overflow detection system for cooling tower equipment in a cigarette factory of the present invention; Figure 4 The figure shows a connection diagram of the anti-overflow device and the intermediate relay in the anti-overflow detection system for cooling tower equipment in a cigarette factory of the present invention; Figure 5 The figure shows the operation schematic diagram of the anti-overflow detection system for cooling tower equipment in a cigarette factory according to the present invention; Figure 6 It is a schematic diagram of a framework of an embodiment of a method for detecting water overflow prevention for cooling tower equipment in a cigarette factory according to the present invention; In the figure: 1-junction box; 2-threaded connector; 3-water inlet; 4-water inlet piece; 5-reducing pipe section; 6-first fixing buckle; 7-float; 8-water storage pipe section; 9-guide rod; 10-second fixing buckle; 11-drainage piece; 12-drainage outlet; 13-water receiving and overflow water pipe device; 14-anti-overflow device; 15-intermediate relay; 16-first pair of interfaces; 17-second pair of interfaces; 18-third pair of interfaces; 19-fourth pair of interfaces; 20-live wire; 21-neutral wire; 22-cooling tower base. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations on the technical solution of the present invention. The embodiments of the present invention and the technical features in the embodiments may be combined with each other unless there is a conflict.

[0025] The term "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " generally indicates that the associated objects are in an "or" relationship.

[0026] Example 1 refer to Figure 1 This embodiment introduces a water overflow detection system for cooling tower equipment in a cigarette factory, which includes: a control unit and a water overflow detection unit. The water overflow detection unit is responsible for real-time monitoring of whether the cooling tower has water overflow, while the control unit is responsible for receiving and processing signals from other parts and responding according to preset rules.

[0027] The overflow detection unit includes: a plurality of water receiving and overflow water pipe devices 13, and an anti-overflow device 14 that is compatible with the structure of the water receiving and overflow water pipe device 13. The upper section of the anti-overflow device 14 abuts against the water receiving and overflow water pipe device 13, and the main body corresponding to the lower section is located in the water receiving and overflow water pipe device 13. Among them, the water receiving and overflow water pipe device 13 is the infrastructure for collecting and discharging cooling water in the cooling tower. Its design allows water to flow smoothly and be discharged when necessary. At the same time, it can also provide a working place for the anti-overflow device 14. The anti-overflow device 14 is the core detection device of this system, which is divided into an upper section and a main body. The upper section abuts against the water receiving and overflow water pipe device 13 to ensure the stability of the device; the main body is located in the water pipe device for real-time monitoring of the water level.

[0028] The control unit is electrically connected to the signal output end of the anti-overflow device 14 so as to receive the liquid level warning signal from the device in real time. Once the water level reaches the preset warning line, the anti-overflow device 14 will immediately trigger a signal, which will then be transmitted to the control unit. After receiving the signal, the control unit will analyze the signal according to preset rules to determine whether there is an abnormal overflow. Once it is confirmed that there is an abnormal overflow, the control unit will quickly issue instructions to the water replenishment unit, which may include stopping the water replenishment operation, starting the drainage system, etc., to quickly respond to the overflow crisis.

[0029] In the actual application of this embodiment, when the water level reaches a preset warning line, the anti-overflow device 14 will send a liquid level warning signal, which will be transmitted to the control unit. The control unit receives the liquid level warning signal from the anti-overflow device 14, and according to the preset rules, the control unit determines whether there is an abnormal overflow in the cooling tower. If it is judged to be an abnormal overflow, the control unit will output a corresponding overflow instruction to the water replenishment unit, and the water replenishment instruction may include stopping water replenishment, starting drainage, etc., to deal with the current overflow situation. In general, the anti-overflow detection system for cooling tower equipment in a cigarette factory provided in this embodiment combines the equipment status and the liquid level warning signal, realizes intelligent overflow judgment and timely response, and provides a strong guarantee for the safe operation of the cooling tower in the cigarette factory.

[0030] Example 2 refer to Figures 1 to 5 Based on Example 1, this example also has the following design.

[0031] First of all, it is worth mentioning that Figure 5 In this embodiment, four water inlet and overflow water pipe devices 13 are arranged in the drainage area of ​​the cooling tower base 22, among which the distance from the water inlet plane to the base corresponding to the A, B, and C water inlet and overflow water pipe devices 13 is 400 mm, while the distance from the water inlet plane to the base corresponding to the D water inlet and overflow water pipe device 13 is 380 mm. This layout can not only ensure the comprehensive coverage of the cooling tower drainage area, but also enable the D water inlet and overflow water pipe device 13 to give priority to detection and response to overflow problems, thereby leaving more time for operators to respond and deal with them.

[0032] refer to Figure 1 The anti-overflow device 14 includes: a water inlet component 3, a pipeline, a drainage component 11 and a detection component. As a threaded connecting rod float sensor switch, the state of the switch can be controlled by the lifting and lowering of the internal float 7.

[0033] The pipeline is a DN65 pipe with a length of 400mm and a material of 304 stainless steel, which includes a variable diameter pipeline section 5 and a water storage pipeline section 8. The water inlet 3 is fixedly connected to the top of the variable diameter pipeline section 5 by welding, and the water inlet 11 is detachably connected to the bottom of the water storage pipeline section 8, specifically fixed to the pipeline by threaded connection, and the material is 304 stainless steel. Among them, the water inlet 3 is a 304 stainless steel disc with a diameter of 15cm and a thickness of 3mm, and its function is to fix the entire anti-overflow device 14 on the pipeline opening corresponding to the water receiving and overflow water pipe device 13.

[0034] The detection assembly serves as a liquid level sensor, and includes: a junction box 1 , a threaded connector 2 , a guide rod 9 , a float 7 , a first fixing buckle 6 and a second fixing buckle 10 .

[0035] One end of the guide rod 9 is connected to the threaded connector 2, and the other end is located in the water storage pipe section 8 through the middle of the water inlet 3; the first fixed buckle 6 and the second fixed buckle 10 are fixed to the outer periphery of the bottom of the guide rod 9 through a clamp, and a closed area for limiting the unlimited movement of the float 7 is formed between the two buckles; the float 7 is sleeved on the outer periphery of the guide rod 9 and is slidably connected to the guide rod 9, and the float 7 moves up and down with the rise and fall of the liquid level, and the position change of the float 7 is converted into a liquid level signal through an electrical device. Among them, the first fixed buckle 6 corresponds to the upper limit of the closed area, and the second fixed buckle 10 corresponds to the lower limit of the closed area.

[0036] refer to Figure 2 and Figure 3 The water inlet 3 is provided with a plurality of water inlets 3 equidistantly arranged in the circumferential direction, and the water inlets 3 are 6 through holes with a diameter of 8 mm. The drainage member 11 is provided with a set of drainage ports 12 symmetrically relative to the axis, and the drainage ports 12 are 2 through holes with a diameter of 8 mm. The outer contour of the water inlet 3 has a diameter larger than the outer contour diameter of the water receiving and overflow water pipe device 13.

[0037] refer to Figure 4 The anti-overflow detection system for cooling tower equipment in a cigarette factory also includes an intermediate relay 15, and the detection component is electrically connected to the control unit through the intermediate relay 15; the intermediate relay 15 is provided with a first pair of interfaces 16, a second pair of interfaces 17, a third pair of interfaces 18 and a fourth pair of interfaces 19; the first pair of interfaces 16 and the second pair of interfaces 17 are respectively connected to the junction box 1 through a live wire 20 and a neutral wire 21; the third pair of interfaces 18 is connected to DV24V, and the fourth pair of interfaces 19 is used as an output point, connected to the PLC DI switch input, and connected to the host computer of the control unit.

[0038] The anti-overflow detection system for cooling tower equipment in a cigarette factory also includes an alarm module, which is electrically connected to the control end of the control unit and is used to output a corresponding first sound and light alarm signal or a second sound and light alarm signal according to the liquid level warning signal output by the detection component and related preset rules.

[0039] The anti-overflow device 14 (connecting rod float liquid level switch) realizes the output of liquid level signal based on the buoyancy principle and magnetic coupling principle. The specific related structural design and implementation process are described as follows.

[0040] The guide rod 9 is a non-magnetic metal guide rod with a length of 35 cm, and a reed switch is installed in the non-magnetic metal guide rod corresponding to the first fixed buckle 6. The float 7 is hollow inside, and a magnet is provided on the ring side. The float 7 automatically adjusts according to the change of water level due to buoyancy. The float 7 in the water will float and drive the main body to move. When the float 7 moves to the upper limit of the closed area with the water level, the float 7 and the reed switch are attracted and the corresponding liquid level warning signal is output to the control unit.

[0041] In actual application, the magnet in the float 7 will move closer to or farther from the reed switch as the float 7 moves. There is a magnetic coupling effect between the annular magnet in the float 7 and the magnet of the reed switch. When the float 7 rises with the liquid level, when the water level reaches the set warning line of 10%, that is, the upper limit of the closed area, the magnet in the float 7 will attract the contact of the reed switch, causing the reed switch to produce an attraction action, thereby outputting a switch signal. When the liquid level drops, the magnet in the float 7 moves away from the reed switch, and the reed switch returns to the disconnected state and outputs a switch signal again. In other words, the float 7 converts the mechanical signal into an electrical signal mode through water level detection to form a switch quantity.

[0042] After receiving the signal, the host computer in the control unit will determine whether there is abnormal overflow in the cooling tower equipment according to the liquid level warning signal output by the anti-overflow device 14 and related preset rules, which may specifically include the following two situations.

[0043] Situation 1: If the float 7 rises to the upper limit position of the closed area, the alarm module outputs the corresponding first sound and light alarm signal; after the first sound and light alarm signal is output, it is further determined whether the cooling tower equipment has just been shut down. If so, it is determined that the cooling tower equipment is overflowing normally; otherwise, it is determined that the cooling tower equipment is overflowing abnormally, and the alarm module outputs the corresponding second sound and light alarm signal.

[0044] Scenario 2: If the float 7 rises to the upper limit of the closed area, the alarm module outputs the corresponding first sound and light alarm signal; after the first sound and light alarm signal is output, first determine whether the cooling tower equipment has just been shut down, if not, determine that the cooling tower equipment is abnormally overflowing, and the alarm module outputs the corresponding second sound and light alarm signal, and it is necessary to investigate the cause of the fault on site; if so, then determine whether the first sound and light alarm signal continues to be output after a preset period of time; if it continues, determine that the cooling tower equipment is abnormally overflowing, and the alarm module outputs the corresponding second sound and light alarm signal; otherwise, determine that the cooling tower equipment is overflowing normally.

[0045] By comparing the two designs, it can be concluded that: Scenario 1 focuses more on the immediate judgment of the equipment status. If the equipment has just stopped, it is considered a normal overflow, otherwise it is considered an abnormal overflow. In contrast, Scenario 2 not only takes the equipment status into consideration, but also further confirms the overflow through observation at a preset time to reduce false alarms, so that the accuracy and reliability of the system can be effectively guaranteed.

[0046] The system of this embodiment can accurately control the water level of the cooling tower, avoid water level fluctuations caused by abnormal overflow, and help the water replenishment pump to operate stably. At the same time, the system can monitor water level changes in real time and notify operators through the alarm device when an abnormality is detected, so that they can respond in time. Once an abnormality is detected, the operator can distinguish between normal overflow and abnormal overflow through the alarm device and respond in time. The system automatically controls the amount of water replenishment based on real-time data, which helps to reduce unnecessary energy consumption.

[0047] In addition, timely water level control can prevent equipment damage caused by abnormal overflow. Ensure that key equipment such as refrigerators and air compressors will not shut down due to insufficient soft water in the water tank due to excessive overflow, and maintain production continuity. Through potential abnormal overflow risks, and take measures in advance to reduce the probability of accidents. Ensure that key equipment such as refrigerators and air compressors will not be damaged due to overflow problems, thereby avoiding production interruptions and reducing economic losses.

[0048] In general, this system improves the efficiency and reliability of cooling tower operation through intelligent monitoring, while also providing important support for plant equipment protection and production stability. And by reducing abnormal overflow and optimizing water replenishment strategies, the system helps to achieve resource conservation and cost-effectiveness.

[0049] Example 3 Based on the same inventive concept as in Example 1 or 2, this embodiment introduces a method for detecting water overflow prevention for cooling tower equipment in a cigarette factory, which comprises the following steps: Receiving a liquid level warning signal output by the overflow prevention device 14; According to the liquid level warning signal, controlling the alarm module to output a corresponding first sound and light alarm signal; After the first sound and light alarm signal is output, it is further determined whether the cooling tower equipment has just been shut down. If so, it is determined that the cooling tower equipment is overflowing normally; otherwise, it is determined that the cooling tower equipment is overflowing abnormally, and the alarm module is controlled to output the corresponding second sound and light alarm signal.

[0050] During the actual application of this embodiment, first, the system receives the liquid level warning signal from the anti-overflow device 14. Once this signal is received, the alarm module is immediately triggered to output the first sound and light alarm signal to alert the operator. Next, the system will make a judgment based on the current operating status of the cooling tower equipment. If the equipment is in a state of just shutting down, it is regarded as a normal overflow; if the equipment has not shut down, it is judged as an abnormal overflow, and the alarm module is immediately controlled to output a more urgent second sound and light alarm signal, so that the operator can quickly identify and take appropriate treatment measures. Through this series of steps, the method realizes the timely monitoring and accurate judgment of the overflow of the cooling tower, providing a strong guarantee for the safe operation of the cooling tower in the cigarette factory.

[0051] Example 4 refer to Figure 6 Based on the same inventive concept as in Example 1 or 2, this embodiment introduces another anti-overflow detection method for cooling tower equipment in a cigarette factory, which comprises the following steps: Receiving a liquid level warning signal output by the overflow prevention device 14; According to the liquid level warning signal, controlling the alarm module to output a corresponding first sound and light alarm signal; After the first sound and light alarm signal is output, first determine whether the cooling tower equipment has just been shut down. If not, determine that the cooling tower equipment is abnormally overflowing, and control the alarm module to output a corresponding second sound and light alarm signal; if so, then determine whether the first sound and light alarm signal continues to be output after a preset time; wherein the preset time is set to 30 minutes; If it continues, it is determined that the cooling tower equipment is overflowing abnormally, and the alarm module is controlled to output the corresponding second sound and light alarm signal; otherwise, it is determined that the cooling tower equipment is overflowing normally.

[0052] In the actual application of this embodiment, first, the system receives the liquid level warning signal from the anti-overflow device 14, that is, when the water level reaches 10% of the set warning line, as a preliminary indication of detecting overflow. After receiving this signal, the system immediately activates the alarm module and outputs the first sound and light alarm signal to attract the attention of the operator. Then, the system enters the judgment stage. First, check whether the cooling tower equipment has just been shut down. If the equipment has not been shut down, it is directly judged as an abnormal overflow situation, and the alarm module is controlled to send a more urgent second sound and light alarm signal, prompting the operator to take countermeasures immediately. If the equipment is in a state of just being shut down, the system continues to monitor and sets a preset time window of 30 minutes.

[0053] In this time window, if the first sound and light alarm signal continues to be output, that is, the anti-overflow device 14 continues to send out a liquid level warning signal, the system determines that it is an abnormal overflow and triggers the second sound and light alarm signal. On the contrary, if the first sound and light alarm signal stops being output in this preset time window, that is, the anti-overflow device 14 no longer sends out a liquid level warning signal, the system determines that it is a normal overflow, which may be a temporary water level rise caused by equipment shutdown. Through this series of precise judgment steps, the method can accurately distinguish between normal overflow and abnormal overflow to ensure the safe operation of the cooling tower of the cigarette factory.

[0054] In the description of the present invention / application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only used to explain the relative positional relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. It is only for the convenience of describing the present invention / application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention / application.

[0055] In the description of the present invention / this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention / this application can be understood through specific circumstances. In addition, in the description of this embodiment, unless otherwise specified, "multiple" means two or more.

[0056] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A water overflow detection system for cooling tower equipment in a cigarette factory, characterized in that: include: Control unit and overflow detection unit; The overflow detection unit comprises: a plurality of water receiving and overflow water pipe devices (13), and an anti-overflow device (13) that is structurally compatible with the water receiving and overflow water pipe devices (14); the upper section of the anti-overflow device (13) abuts against the water receiving and overflow water pipe devices (14), and the main body corresponding to the lower section is located in the water receiving and overflow water pipe devices (14); The control unit is electrically connected to the signal output end of the anti-overflow device (14) and is used to determine whether there is abnormal overflow in the cooling tower equipment based on the liquid level warning signal output by the anti-overflow device (14) and related preset rules, and if so, output a corresponding overflow instruction to the water replenishment unit.

2. The anti-overflow detection system for cooling tower equipment in a cigarette factory according to claim 1, characterized in that: The anti-overflow device (14) comprises: a water inlet component (4), a pipeline, a drainage component (11) and a detection component; The pipeline comprises a variable diameter pipeline section (5) and a water storage pipeline section (8); the water inlet component (4) is fixedly connected to the top of the variable diameter pipeline section (5), and the water inlet component (4) is detachably connected to the bottom of the water storage pipeline section (8); The detection assembly serves as a liquid level sensor, comprising: a junction box (1), a threaded connector (2), a guide rod (9), a float (7), a first fixing buckle (6) and a second fixing buckle (10); One end of the guide rod (9) is connected to the threaded connector (2), and the other end is located in the water storage pipe section (8) through the middle of the water inlet member (4); the first fixing buckle (6) and the second fixing buckle (10) are fixed to the outer periphery of the bottom of the guide rod (9) through a clamp, and a closed area for limiting the unlimited movement of the float (7) is formed between the two buckles; the float (7) is sleeved on the outer periphery of the guide rod (9) and is slidably connected to the guide rod (9); The first fixing buckle (6) corresponds to the upper limit position of the closed area, and the second fixing buckle (10) corresponds to the lower limit position of the closed area.

3. The anti-overflow detection system for cooling tower equipment in a cigarette factory according to claim 2, characterized in that: The guide rod (9) is a non-magnetic metal guide rod, and a reed switch is installed in the non-magnetic metal guide rod at a position corresponding to the first fixing buckle (6); The float (7) is hollow inside and a magnet is provided on the ring side. When the float (7) moves to the upper limit of the closed area along with the water level, the float (7) engages with the magnetic reed switch and outputs a corresponding liquid level warning signal to the control unit.

4. The anti-overflow detection system for cooling tower equipment in a cigarette factory according to claim 3, characterized in that: The water inlet member (4) is provided with a plurality of water inlets (3) equidistantly arranged in the circumferential direction, and the water discharge member (11) is provided with a group of water discharge ports (12) symmetrically arranged with respect to the axis. Wherein, the diameter corresponding to the outer contour of the water inlet component (4) is larger than the outer contour diameter of the water receiving and overflow water pipe device (13).

5. The anti-overflow detection system for cooling tower equipment in a cigarette factory according to claim 4, characterized in that: It also includes an intermediate relay (15), and the detection component is electrically connected to the control unit via the intermediate relay (15); The intermediate relay (15) is provided with a first pair of interfaces (16), a second pair of interfaces (17), a third pair of interfaces (18) and a fourth pair of interfaces (19); the first pair of interfaces (16) and the second pair of interfaces (17) are respectively connected to the junction box (1) via a live wire (20) and a neutral wire (21); the third pair of interfaces (18) is connected to DV24V, and the fourth pair of interfaces (19) is connected to a PLC DI of the control unit as an output quantity point.

6. The anti-overflow detection system for cooling tower equipment in a cigarette factory according to claim 5, characterized in that: It also includes an alarm module, which is electrically connected to the control end of the control unit and is used to output a corresponding first sound and light alarm signal or a second sound and light alarm signal according to the liquid level warning signal output by the detection component and related preset rules.

7. The anti-overflow detection system for cooling tower equipment in a cigarette factory according to claim 6, characterized in that: Judging whether there is abnormal overflow in the cooling tower equipment based on the liquid level warning signal output by the overflow prevention device (14) and related preset rules includes: If the float (7) rises to the upper limit position of the closed area, the alarm module outputs a corresponding first sound and light alarm signal; After the first sound and light alarm signal is output, it is further determined whether the cooling tower equipment has just been shut down. If so, it is determined that the cooling tower equipment is overflowing normally; otherwise, it is determined that the cooling tower equipment is overflowing abnormally, and the alarm module outputs the corresponding second sound and light alarm signal.

8. The anti-overflow detection system for cooling tower equipment in a cigarette factory according to claim 6, characterized in that: Judging whether there is abnormal overflow in the cooling tower equipment according to the liquid level warning signal output by the overflow prevention device (14) and related preset rules, further comprising: If the float (7) rises to the upper limit position of the closed area, the alarm module outputs a corresponding first sound and light alarm signal; After the first sound and light alarm signal is output, it is first determined whether the cooling tower equipment has just been shut down. If not, it is determined that the cooling tower equipment is abnormally overflowing, and the alarm module outputs a corresponding second sound and light alarm signal; if so, it is then determined whether the first sound and light alarm signal continues to be output after a preset period of time; If it continues, it is determined that the cooling tower equipment is overflowing abnormally, and the alarm module outputs the corresponding second sound and light alarm signal; otherwise, it is determined that the cooling tower equipment is overflowing normally.

9. A method for detecting overflow prevention for cooling tower equipment in a cigarette factory, characterized in that: include: receiving a liquid level warning signal output by the water overflow prevention device (14); According to the liquid level warning signal, controlling the alarm module to output a corresponding first sound and light alarm signal; After the first sound and light alarm signal is output, first determine whether the cooling tower equipment has just been shut down. If not, determine that the cooling tower equipment is abnormally overflowing, and control the alarm module to output a corresponding second sound and light alarm signal; if so, then determine whether the first sound and light alarm signal continues to be output after a preset period of time; If it continues, it is determined that the cooling tower equipment is overflowing abnormally, and the alarm module is controlled to output the corresponding second sound and light alarm signal; otherwise, it is determined that the cooling tower equipment is overflowing normally.

10. The method for preventing water overflow for cooling tower equipment in a cigarette factory according to claim 9, characterized in that: The preset time is set to 30 minutes.

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