Water curtain cooling system and method for clearing blockage

Abstract

The present application provides a water curtain cooling system and a method for clearing blockage. The water curtain cooling system comprises a wet curtain frame and wet curtain paper arranged in the wet curtain frame. A water tank is arranged at the bottom of the wet curtain frame. A water spraying pipe is arranged at the top of the wet curtain frame. The water tank and the water spraying pipe are connected with a water supply pipe with a water pump. A water return plate is arranged above the water spraying pipe. A steel needle is arranged directly above each spray hole of the water spraying pipe. The steel needle can be inserted into the spray hole. The tip of the steel needle can extend into the inner cavity of the water spraying pipe. The method comprises the following steps: controlling the water pump to stop; controlling the steel needle to reciprocally move up and down in the vertical direction for several times and then reset. When the steel needle moves down to the lower limit position, the tip of the steel needle extends into the inner cavity of the water spraying pipe; and controlling the water pump to start. The present application can clear the spray holes in a unit length at one time without disassembling the water return plate. The present application not only greatly improves the clearing efficiency of the spray holes of the water curtain cooling system, but also greatly simplifies the cleaning process of the spray holes of the water curtain cooling system. The operation is more simple and convenient.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of water curtain cooling system, and particularly relates to a water curtain cooling system and a clogging cleaning method. BACKGROUND

[0002] In order to reduce the influence of heat stress on pigs, water curtain cooling systems (also known as pig farm wet curtains) are usually installed in large-scale pig farms. The cooling process of the existing water curtain cooling system is completed in its core component (wet curtain paper). When the outdoor hot air is sucked into the wet curtain paper filled with cooling water by the fan, the cooling water is converted from liquid to gaseous water molecules, absorbing a large amount of heat energy in the air to rapidly lower the air temperature. After mixing with the indoor hot air, the air is discharged outdoors through the negative pressure fan.

[0003] The existing water curtain cooling system mainly includes a wet curtain frame and a wet curtain paper arranged in the wet curtain frame. A water tank is arranged at the bottom of the wet curtain frame, and a water spraying pipe with water spraying holes is arranged at the top of the wet curtain frame. The water tank and the water spraying pipe are connected to a water supply pipe with a water pump. A water return plate is arranged above the water spraying pipe. In use, the pressurized water in the water supply pipe is sprayed upwards into the water spraying pipe and flows downwards to the wet curtain paper under the action of the water return plate to form a water film, and finally is collected by the water tank and recycled.

[0004] During the use of the water curtain cooling system, the dust in the air continuously enters the water film and circulates with the water flow as the external air continuously passes through the wet curtain paper. At the same time, the fine paper dust of the wet curtain paper also circulates with the water flow. These dust and fine paper dust can easily cause the water spraying holes on the water spraying pipe to be blocked. For this problem, the current solution is usually to periodically remove the water return plate and then clean the water spraying holes one by one. Obviously, this has the problems of low cleaning efficiency (about two minutes are needed for cleaning each square meter of the water curtain in a single cleaning) and inconvenience of cleaning.

[0005] In addition, the existing document CN217952528U discloses an evaporative humidification and cooling device. A first water distribution tank is arranged below the upper frame of the frame, and a water supply cavity is formed between the first water distribution tank and the upper frame of the frame. A water supply pipe is arranged in the water supply cavity. A pair of first limiting plates are arranged at the lower ends of the two sides of the first water distribution tank. A second water distribution tank is arranged in the frame. A pair of first positioning plates are arranged at the upper ends of the two sides of the second water distribution tank. A first wet curtain paper core is arranged between the pair of first limiting plates and the first positioning plates. A pair of second limiting plates are arranged on the second water distribution tank. A water collecting tank is arranged at the pair of second limiting plates corresponding to the lower frame of the frame. A pair of second positioning plates are arranged at the upper end of the water collecting tank. A second wet curtain paper core is arranged between the pair of second limiting plates and the pair of second positioning plates. A water return pipe is arranged in the water collecting tank. However, this scheme still cannot solve the problem of water spraying hole blockage caused by dust and fine paper dust in the circulating water flow. SUMMARY

[0006] At least to solve the technical problems mentioned in the background, the present application aims to provide a water curtain cooling system and a clogging clearing method.

[0007] The present application adopts the following technical solutions.

[0008] A water curtain cooling system comprises a wet curtain frame and wet curtain paper arranged in the wet curtain frame, a water tank is arranged at the bottom of the wet curtain frame, a water spraying pipe is arranged at the top of the wet curtain frame, the water tank and the water spraying pipe are connected with a water supply pipe provided with a water pump, a water return plate is arranged above the water spraying pipe, and a steel needle is arranged directly above each spray hole of the water spraying pipe, the steel needle can be inserted into the spray hole, and the tip of the steel needle can extend into the inner cavity of the water spraying pipe.

[0009] In order to more smoothly implement the clogging clearing operation of the water spraying hole, the steel needle is arranged on a rigid carrier, the rigid carrier is part of the water return plate, and the edge of the rigid carrier can be sealingly connected with the connecting part of the water return plate.

[0010] As a preferred solution, the rigid carrier adopts a rigid circular rod or a rigid arc plate.

[0011] In order to more efficiently and stably implement the clogging clearing operation of the water spraying hole, the rigid carrier is connected at both ends to a lifting mechanism, and the vertical movement of the rigid carrier is driven by controlling the operation of the lifting mechanism.

[0012] In order to more smoothly, efficiently and stably implement the online clogging clearing operation of the water spraying hole, the steel needle is arranged on a rigid carrier, a thread is arranged on the steel needle, the water return plate is used as the rigid carrier, and the rigid carrier is connected to a lifting mechanism, and the vertical movement of the rigid carrier is driven by controlling the operation of the lifting mechanism. With such a structure, the rapid clogging clearing of the water spraying hole is realized in an extremely simple and ingenious solution without changing the main structure of the water curtain cooling system, and part of the fine particles can be accumulated in the thread groove of the steel needle, which is beneficial to setting a larger water spraying hole (compared with the water spraying hole of the conventional water curtain cooling system) and more effectively preventing the clogging of the water spraying hole. A clogging clearing method using the water curtain cooling system comprises the following steps:

[0013] Step 21: controlling the normal operation of the water pump; controlling the operation of the lifting mechanism to move the steel needle downward to the lower limit position, at this time, the tip of the steel needle extends into the inner cavity of the water spraying pipe, and the annular gap between the steel needle and the spray hole and the space between the outer wall of the water spraying pipe and the inner wall of the water return plate together serve as a water spraying channel; step 22: controlling the operation of the lifting mechanism at a set time point to make the steel needle reciprocate in the vertical direction for several times and then reset.

[0014] As a preferred solution, the lifting mechanism adopts a sliding rail and sliding block assembly, the rigid carrier is connected at both ends to the sliding block, and the sliding rail is matched with a vertically arranged sliding rail, and the sliding rail is located at both ends of the water spraying pipe.

[0015] Or, the lifting mechanism adopts a screw drive mechanism, the rigid carrier is connected at both ends to the nut seat of the screw drive mechanism, and the side wall of the nut seat can be matched as an end cover to the end of the water spraying pipe.

[0016] As another preferred embodiment of the present application, the steel needle is replaced by a steel wire; a mouth is arranged on the top of the backwater plate and above the spray hole; the rigid carrier adopts a rigid arc plate, one side of the rigid arc plate is hingedly connected to the wet curtain frame, and the other end of the rigid arc plate is a free end; a reversible arc-shaped cover plate is arranged on the opposite side of the rigid arc plate, the arc-shaped cover plate is hingedly connected to the wet curtain frame, the edge of the arc-shaped cover plate can be sealingly connected to the connection part of the wet curtain frame, and the size of the arc-shaped cover plate is the same as that of the rigid arc plate; in the use state, the arc-shaped cover plate is matched at the mouth, and the rigid arc plate is in an open state; in the process of clearing the blockage, the rigid arc plate is matched at the mouth, and the arc-shaped cover plate is in an open state.

[0017] Further, a sealing pad layer is arranged on the surface of the rigid carrier.

[0018] A method for clearing blockage by using the water curtain cooling system, comprising the following steps:

[0019] Step 1, control the water pump to stop;

[0020] Step 2, control the steel needle to reciprocate vertically for several times and then reset, and when the steel needle is lowered to the lower limit position, the tip of the steel needle extends into the inner cavity of the water spraying pipe;

[0021] Step 3, control the water pump to start.

[0022] A method for clearing blockage by using the water curtain cooling system, comprising the following steps:

[0023] Step 1, control the gear position of the water pump to be smaller or control the water pump to stop;

[0024] Step 2, control the lifting mechanism to operate, so that the steel needle reciprocates vertically for several times and then resets, and when the steel needle is lowered to the lower limit position, the tip of the steel needle extends into the inner cavity of the water spraying pipe;

[0025] Step 3, control the water pump to start.

[0026] A method for clearing blockage by using the water curtain cooling system, comprising the following steps:

[0027] Step 11, control the water pump to stop;

[0028] Step 12, open the arc-shaped cover plate;

[0029] Step 13, first open the rigid arc plate, and then repeatedly operate in the mode of “buckling the rigid arc plate and opening the rigid arc plate” for multiple times, and each time the rigid arc plate is buckled, the tip of the steel needle extends into the inner cavity of the water spraying pipe;

[0030] Step 14, control the water pump to start.

[0031] Beneficial effects: by using the scheme of the present application, the water spray holes in a unit length (such as one meter, two meters or other lengths) can be cleaned at one time without disassembling the backwater plate, which not only greatly improves the cleaning efficiency of the water spray holes of the water curtain cooling system, but also greatly simplifies the cleaning process of the water spray holes of the water curtain cooling system, and the operation is more simple and convenient. In addition, the scheme of the present application can realize online cleaning of the water curtain cooling system, and can clean the local unit section. In one preferred scheme, the water spray hole is quickly cleaned in a very simple and ingenious scheme without changing the main structure of the water curtain cooling system, and part of the fine particles can be accumulated in the thread groove of the steel needle, which is beneficial to set the water spray hole diameter larger (compared with the water spray hole of the conventional water curtain cooling system), and more effectively prevent the water spray hole from being blocked. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a perspective view of the water curtain cooling system (single body / unit) in Example 1;

[0033] Figure 2 is a cross-sectional view of Figure 1 ;

[0034] Figure 3 is a perspective view of the water curtain cooling system (single body / unit) in Example 2;

[0035] Figure 4 is a cross-sectional view of Figure 3 ;

[0036] Figure 5 is a perspective view of the water curtain cooling system (single body / unit) in Example 3;

[0037] Figure 6 is a cross-sectional view of Figure 5 ;

[0038] Figure 7 and Figure 8 is a schematic view of the water curtain cooling system in Example 4 in a local (steel needle position) use state. DETAILED DESCRIPTION

[0039] The technical solutions in the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application. It should be noted that during the process of clearing the clogging of the water spraying pipe 4 of the water curtain cooling system, the end plate of the water spraying pipe 4 is preferably opened periodically to facilitate the discharge of the clogging.

[0040] Embodiment 1: in combination with Figure 1 and Figure 2 As shown in FIG. 1, a water curtain cooling system comprises a wet curtain frame 1, a wet curtain paper 2 arranged in the wet curtain frame 1, a water tank 3 arranged at the bottom of the wet curtain frame 1, a water spraying pipe 4 arranged at the top of the wet curtain frame 1, a water supply pipe 6 connected with the water tank 3 and the water spraying pipe 4 and provided with a water pump 5, a backwater plate 7 arranged above the water spraying pipe 4 and in the wet curtain frame 1, and a steel needle 10 arranged above each spray hole 8 of the water spraying pipe 4, which can be inserted into the spray hole 8 and the tip of which can extend into the inner cavity of the water spraying pipe 4. In this embodiment, the steel needle 10 is replaced by a stainless steel wire; a mouth is arranged at the top of the backwater plate 7 and above the spray hole 8; a rigid carrier 11 is a rigid arc plate, one edge of which is hingedly connected to the wet curtain frame 1, and the other edge of which is a free end; an arc-shaped cover plate capable of being turned over is arranged on the opposite side of the rigid arc plate, which is hingedly connected to the wet curtain frame 1, and the edge of which can be sealingly connected to the connection part of the wet curtain frame 1, and the size of the arc-shaped cover plate is the same as that of the rigid arc plate; in the use state, the arc-shaped cover plate is fitted at the mouth, and the rigid arc plate is in the turned-over state; in the clogging clearing process, the rigid arc plate is fitted at the mouth, the steel needle 10 is just inserted into the spray hole 8 and extends into the inner cavity of the water spraying pipe 4, and the arc-shaped cover plate is in the turned-over state.

[0041] A clogging clearing method for the water curtain cooling system in this embodiment, the steps of which include:

[0042] Step 11: control the water pump 5 to stop;

[0043] Step 12: turn open the arc-shaped cover plate;

[0044] Step 13: first turn open the rigid arc plate, and then repeatedly operate several times in the mode of “buckling the rigid arc plate-turning open the rigid arc plate”, and every time the rigid arc plate is buckled, the tip of the steel needle 10 extends into the inner cavity of the water spraying pipe 4;

[0045] Step 14: control the water pump 5 to start.

[0046] Embodiment 2: in combination with Figure 3 and Figure 4As shown, a water curtain cooling system includes a wet curtain frame 1 and a wet curtain paper 2 arranged in the wet curtain frame 1, a water tank 3 arranged at the bottom of the wet curtain frame 1, a water spraying pipe 4 arranged at the top of the wet curtain frame 1, the water tank 3 and the water spraying pipe 4 being connected with a water supply pipe 6 provided with a water pump 5, and a water deflector 7 arranged above the water spraying pipe 4, the water deflector 7 being in an arc structure, the diameter of the arc structure being 1.5-2 times the outer diameter of the water spraying pipe 4, and a steel needle 10 being arranged directly above each spray hole 8 of the water spraying pipe 4, the steel needle 10 being able to be inserted into the spray hole 8 and the tip of the steel needle 10 being able to extend into the inner cavity of the water spraying pipe 4. In the embodiment, the steel needle 10 is arranged on a rigid carrier, the water deflector 7 is used as the rigid carrier, the top surface of the rigid carrier (i.e. the top surface of the water deflector 7) is connected to a lifting mechanism, the lifting mechanism is an electric push rod, and the rigid carrier is vertically moved by controlling the operation of the lifting mechanism. In the embodiment, the original fixed water deflector 7 is arranged as a movable water deflector 7 and is used in cooperation with the steel needle 10, which is very ingenious. By means of the arc structure of the water deflector 7 of the conventional water curtain cooling system, the spray hole of the water curtain cooling system can be cleaned at any time, which is very convenient and efficient in use and does not affect the flow field of the water flow and does not have safety hazards. In use, the lifting mechanism is controlled to operate regularly according to the set program, manual operation is not required, and the water curtain cooling system can be installed at any position of the side wall of a pig house, especially in high-altitude environments (such as the wall of a floor above the bottom floor of a building pig farm). Compared with the manual cleaning work of the conventional water curtain cooling system, at least 70% of the cost of manual cleaning can be saved by using the scheme of the present application.

[0047] A method for cleaning the water curtain cooling system in the embodiment, the steps comprising:

[0048] Step 1: regularly control the gear of the water pump 5 to be smaller or control the water pump 5 to be paused;

[0049] Step 2: control the lifting mechanism to operate for a set period of time, so that the water deflector 7 reciprocally moves up and down in the vertical direction for several times and then returns to the original position, in this process, the steel needle 10 also reciprocally moves up and down in the vertical direction for several times and then returns to the original position, and when the steel needle 10 moves down to the lower limit position, the tip of the steel needle 10 extends into the inner cavity of the water spraying pipe 4;

[0050] Step 3: control the water pump 5 to be started.

[0051] Embodiment 3: combined with Figure 5 and Figure 6As shown, a water curtain cooling system includes a wet curtain frame 1 and a wet curtain paper 2 arranged in the wet curtain frame 1. A water tank 3 is arranged at the bottom of the wet curtain frame 1, and a water spraying pipe 4 is arranged at the top of the wet curtain frame 1. The water tank 3 and the water spraying pipe 4 are connected with a water supply pipe 6 provided with a water pump 5. A water return plate 7 is arranged above the water spraying pipe 4. A steel needle 10 is arranged directly above each spray hole 8 of the water spraying pipe 4. The steel needle 10 can be inserted into the spray hole 8, and the tip of the steel needle 10 can extend into the inner cavity of the water spraying pipe 4. In this embodiment, the steel needle 10 is arranged on a rigid carrier 11, and the rigid carrier 11 is arranged on the inner wall of the water return plate 7. The rigid carrier 11 is in the form of a rigid circular rod or an arc-shaped plate. A handle 9 is arranged on the rigid carrier 11. The two ends of the rigid carrier 11 are connected to a lifting mechanism. The rigid carrier 11 is vertically moved by controlling the operation of the lifting mechanism.

[0052] In embodiment 4, the water curtain cooling system includes a wet curtain frame 1 and a wet curtain paper 2 arranged in the wet curtain frame 1. A water tank 3 is arranged at the bottom of the wet curtain frame 1, and a water spraying pipe 4 is arranged at the top of the wet curtain frame 1. The water tank 3 and the water spraying pipe 4 are connected with a water supply pipe 6 provided with a water pump 5. A water return plate 7 is arranged above the water spraying pipe 4. A steel needle 10 is arranged directly above each spray hole 8 of the water spraying pipe 4. The steel needle 10 can be inserted into the spray hole 8, and the tip of the steel needle 10 can extend into the inner cavity of the water spraying pipe 4. In this embodiment, the steel needle 10 is arranged on a rigid carrier 11. The rigid carrier 11 is part of the water return plate 7. The edge of the rigid carrier 11 is sealingly connected with the connecting part of the water return plate 7. A sealing glue layer is wrapped on the surface of the rigid carrier 11. A screw rod transmission mechanism is used as the lifting mechanism. The two ends of the rigid carrier 11 are connected to the nut seat of the screw rod transmission mechanism. The side wall of the nut seat can be used as an end cover and is fitted on the end of the water spraying pipe 4. In this embodiment, the screw rod transmission mechanism is used to drive the rigid carrier 11 to stably move up and down, thereby driving the steel needle 10 to stably move up and down.

[0053] The method for clearing the blockage of the water curtain cooling system in embodiment 3 or embodiment 4 includes the following steps.

[0054] Step 1: The gear of the water pump 5 is controlled to be small or the water pump 5 is controlled to be paused.

[0055] Step 2: The lifting mechanism is controlled to operate, so that the rigid carrier 11 is reciprocally lifted in the vertical direction for several times and then returns to the original position. In this process, the steel needle 10 is also reciprocally lifted in the vertical direction for several times and then returns to the original position. When the steel needle 10 is lowered to the lower limit position, the tip of the steel needle 10 extends into the inner cavity of the water spraying pipe 4.

[0056] Step 3: The water pump 5 is controlled to be started.

[0057] In embodiment 5, the water curtain cooling system in embodiment 2 is combined withFigure 7 and Figure 8 As shown in FIG. 1, a water curtain cooling system includes a wet curtain frame 1 and a wet curtain paper 2 arranged in the wet curtain frame 1. A water tank 3 is arranged at the bottom of the wet curtain frame 1, and a water spraying pipe 4 is arranged at the top of the wet curtain frame 1. The water tank 3 and the water spraying pipe 4 are connected with a water supply pipe 6 provided with a water pump 5. A water deflector 7 is arranged above the water spraying pipe 4. The water deflector 7 has an arc structure, and the diameter of the arc structure is 1.5 times the outer diameter of the water spraying pipe 4. A steel needle 10 is arranged directly above each spray hole 8 of the water spraying pipe 4. The steel needle 10 can be inserted into the spray hole 8, and the tip of the steel needle 10 can extend into the inner cavity of the water spraying pipe 4. The steel needle 10 is provided with a thread. In this embodiment, the steel needle 10 is arranged on a rigid carrier. The water deflector 7 is used as the rigid carrier. The top surface of the rigid carrier (i.e. the top surface of the water deflector 7) is connected to a lifting mechanism. The lifting mechanism is an electric push rod. The rigid carrier is vertically moved by controlling the operation of the lifting mechanism.

[0058] A method for clearing the clogging of the water curtain cooling system is provided. The steps include:

[0059] In step 21, the water pump 5 is controlled to operate normally. The lifting mechanism is controlled to operate, and the steel needle 10 is moved to the lower limit position. At this time, the tip of the steel needle 10 extends into the inner cavity of the water spraying pipe 4. The annular gap between the steel needle 10 and the spray hole 8 and the space between the outer wall of the water spraying pipe 4 and the inner wall of the water deflector 7 serve as the water spraying channel. The state at this time is shown in FIG. 2. Figure 7

[0060] In step 22, the lifting mechanism is controlled to operate at a set time point. The steel needle 10 is reciprocally lifted and lowered in the vertical direction for several times and then returns to the original position. The state after the steel needle 10 is lifted is shown in FIG. 3. Figure 8

[0061] In this scheme, the clogging of the water spraying hole is quickly cleared by a simple and ingenious scheme without changing the main structure of the water curtain cooling system. Part of the fine particles can be accumulated in the thread groove of the steel needle, which is beneficial to set a larger water spraying hole diameter (compared with the conventional water curtain cooling system, for example, the diameter of the conventional water spraying hole is usually not more than 2 mm, while the diameter of the water spraying hole can be 10 mm or even larger by using this scheme), which can more effectively prevent the clogging of the water spraying hole.

[0062] ​​The scheme of the present application can clean the water spraying holes in a unit length (for example, one meter, two meters or other lengths) at one time without disassembling the backwater plate, can effectively clean the water spraying hole blockage caused by air dust and small paper scraps entering the circulating water flow, greatly improves the cleaning efficiency of the water spraying holes of the water curtain cooling system, and takes less than twenty seconds (average value) to clean each square meter of the water curtain, greatly simplifies the cleaning process of the water spraying holes of the water curtain cooling system, and is more simple and convenient to operate. In addition, the scheme of the present application can realize online cleaning of the water curtain cooling system, and can timely clean the local unit section.

Claims

1. A water curtain cooling system, comprising a wet curtain frame (1) and wet curtain paper (2) disposed within the wet curtain frame (1), a water tank (3) disposed at the bottom of the wet curtain frame (1), a spray pipe (4) disposed at the top of the wet curtain frame (1), the water tank (3) and the spray pipe (4) being connected to a water supply pipe (6) equipped with a water pump (5), and a deflector plate (7) disposed above the spray pipe (4), characterized in that: A steel needle (10) is arranged right above each spray hole (8) of the water spray pipe (4), the steel needle (10) can be inserted into the spray hole (8) and the tip of the steel needle (10) can extend into the inner cavity of the water spray pipe (4); the steel needle (10) is arranged on a rigid carrier (11), the rigid carrier (11) is part of the backwater plate (7), and the edge of the rigid carrier (11) can be sealingly connected with the connecting part of the backwater plate (7); the rigid carrier (11) is a rigid round rod or a rigid arc plate; the two ends of the rigid carrier (11) are connected to the lifting mechanism, and the rigid carrier (11) is vertically moved by controlling the operation of the lifting mechanism; a sealing pad layer is arranged on the surface of the rigid carrier (11).

2. The water curtain cooling system of claim 1, wherein: The steel needle (10) is arranged on the rigid carrier, a thread is arranged on the steel needle (10), the backwater plate (7) is used as the rigid carrier, and the rigid carrier is connected to the lifting mechanism, and the rigid carrier (11) is vertically moved by controlling the operation of the lifting mechanism.

3. The water curtain cooling system according to claim 2, characterized in that: (A) the lifting mechanism is a slide rail and slide block assembly, the two ends of the rigid carrier (11) are connected to the slide blocks, the slide rail is matched with a vertically arranged slide rail, and the slide rail is located at the two ends of the water spray pipe (4); or (B) the lifting mechanism is a lead screw transmission mechanism, the two ends of the rigid carrier (11) are connected to a nut seat of the lead screw transmission mechanism, and the side wall of the nut seat can be matched with an end cover at the end of the water spray pipe (4). The steel needle (10) is replaced by a steel wire; a mouth is arranged on the top of the backwater plate (7) and above the spray hole (8); the rigid carrier (11) is a rigid arc plate, one edge of the rigid arc plate is hingedly connected to the wet curtain frame (1), and the other end edge of the rigid arc plate is a free end; an arc-shaped cover plate capable of being turned over is arranged on the opposite side of the rigid arc plate, the arc-shaped cover plate is hingedly connected to the wet curtain frame (1), the edge of the arc-shaped cover plate is sealingly connected with the connecting part of the wet curtain frame (1), and the size of the arc-shaped cover plate is the same as that of the rigid arc plate; in the use state, the arc-shaped cover plate is matched with the mouth, and the rigid arc plate is in the turned-over state; 4. The water curtain cooling system of claim 2, wherein: In the cleaning process, the rigid arc plate is matched with the mouth, and the arc-shaped cover plate is in the turned-over state. The steps include:

5. A method for clearing a blockage using the water curtain cooling system of claim 2, the method comprising the steps of: Step 21: controlling the water pump (5) to normally operate; controlling the lifting mechanism to operate, so that the steel needle (10) is moved downward to the lower limit position, at this time, the tip of the steel needle (10) extends into the inner cavity of the water spray pipe (4), and the annular gap between the steel needle (10) and the spray hole (8) and the space between the outer wall of the water spray pipe (4) and the inner wall of the backwater plate (7) together serve as a water spray channel; Step 22: controlling the lifting mechanism to operate at a set time point, so that the steel needle (10) is reciprocally vertically moved for several times and then returns to the original position. The steps include:

6. A method for clearing a blockage using the water curtain cooling system of any one of claims 1-2, the method comprising the steps of: Step 1: controlling the water pump (5) to be paused or controlling the gear of the water pump (5) to be reduced; Step 2: controlling the steel needle (10) to be reciprocally vertically moved for several times and then return to the original position, and when the steel needle (10) is moved downward to the lower limit position, the tip of the steel needle (10) extends into the inner cavity of the water spray pipe (4); Step 3: controlling the water pump (5) to be started. ​ 7. A method for unclogging the water curtain cooling system according to claim 3, characterized in that the steps include... ​ Step 1, control the gear of water pump (5) to reduce or control water pump (5) to stop; Step 2, control the lifting mechanism to operate, so that the steel needle (10) reciprocates in the vertical direction for several times and then resets, and when the steel needle (10) moves down to the lower limit position, the tip of the steel needle (10) extends into the inner cavity of the water jet pipe (4); Step 3, control water pump (5) to start.

8. A method for clearing a blockage using the water curtain cooling system of claim 4, the method comprising the steps of: Comprising: Step 11, control water pump (5) to stop; Step 12, open the arc-shaped cover plate; Step 13, first open the rigid arc plate, and then repeatedly operate the "buckling rigid arc plate - opening rigid arc plate" for multiple times, and each time the rigid arc plate is buckled, the tip of the steel needle (10) extends into the inner cavity of the water jet pipe (4); Step 14, control water pump (5) to start.

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