Pickling passivation device for cooler cover water collecting pipe

Abstract

The utility model relates to the technical field of pickling and passivating devices, in particular to a pickling and passivating device for a cooler cover water collecting pipe. The cooler cover comprises a cover body; a circular through hole is formed in the center of the cover body; a first water collecting pipe is arranged along the edge of the through hole; the first water collecting pipe is provided with a water inlet and a water outlet; the pickling passivation device comprises a first working pump, a first pickling passivation tank, a first deionized water tank, a first liquid inlet pipe and a first return pipe; a pipeline is connected between the first working pump and the first pickling passivation tank; a pipeline is connected between the first working pump and the first deionized water tank; a first liquid inlet pipe is connected between the outlet end of the first working pump and the first water collecting pipe; and a first return pipe is connected between the first water collecting pipe and the first pickling passivation tank. The cooler cover water collecting pipe pickling and passivating device solves the problem that the scene that a large and long pipeline cannot be completely soaked in a cleaning tank is limited, an operator is prevented from making direct contact with pickling and passivating liquid, and the device is simple in structure, easy to maintain and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of pickling and passivation devices, in particular to a cooler cover water collection pipe pickling and passivation device. Background Art

[0002] When the generator is working, the temperature of the internal iron core and stator coil rises. In order to prevent the coil from being damaged by overheating and the aging of the insulation material that affects the service life of the generator, cooling measures must be taken to remove the heat generated by the coil and iron core in time.

[0003] The cooler cover manifold is used to collect cooling water. The cooling water is collected from the excitation end of the generator into the manifold, and the cooling water flows through the manifold to the inside of the stator coil, thereby removing the heat generated by the loss of the generator stator coil. However, impurities such as oil, welding, rust, and dust generated by welding the manifold before leaving the factory can also affect the cooling effect of the generator. Traditional cleaning methods often manually disassemble the manifold to be cleaned and immerse it in a cleaning tank. The highly corrosive pickling and passivation liquid in the tank splashes and can easily injure operators. Moreover, considering the cost of reagents and the size of the tank space, traditional cleaning equipment cannot completely immerse large and long pipes, resulting in inadequate cleaning of the pipes and unsatisfactory cleaning results. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a cooler cover manifold pickling and passivation device for cleaning impurities from the inner walls of the cooler cover manifold. This device effectively addresses the limitations of large and long pipes, which often require complete immersion in a cleaning tank, preventing direct contact between operators and the pickling and passivation solution. The device also features a simple structure, ease of maintenance, and high practicality.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a cooler cover water pipe pickling and passivation device, the cooler cover includes a cover body; a circular through hole is provided in the center of the cover body, and a first water pipe is provided along the edge of the through hole; the first water pipe is provided with a water inlet and a water outlet; the cooler cover water pipe pickling and passivation device includes a first working pump, a first pickling and passivation tank, a first deionized water tank, a first liquid inlet pipe and a first return pipe; a pipe is connected between the inlet end of the first working pump and the first pickling and passivation tank; a pipe is connected between the inlet end of the first working pump and the first deionized water tank; the first liquid inlet pipe is connected between the outlet end of the first working pump and the water inlet of the first water pipe; and the first return pipe is connected between the water outlet of the first water pipe and the first pickling and passivation tank.

[0006] The first pickling and passivation tank is filled with pickling and passivation liquid, which is used to clean the oil, welding, rust, dust and other impurities on the inner wall of the cooler cover manifold; the first deionized water tank is filled with deionized water, which is used to flush the passivation liquid remaining on the inner wall of the pipe to prevent the introduction of foreign impurities. When cleaning the manifold, the pickling and passivation liquid or deionized water flows through the pipe to the first working pump, and then enters the first manifold through the first liquid inlet pipe under the pressure of the pump. After the pipe is cleaned, the pickling and passivation liquid or deionized water flows back to the first pickling and passivation tank from the first return pipe. This device does not require the pipe to be immersed in the cleaning tank. It not only effectively solves the problem of large and long pipes that cannot be completely immersed in the cleaning tank, but also avoids direct contact between operators and highly corrosive pickling and passivation liquid, reducing the safety risks of operators.

[0007] Furthermore, the cooler cover water pipe pickling and passivation device includes a first control valve and a second control valve; the inlet end of the first working pump has a junction joint; the inlet end of the first working pump is connected to the first pickling and passivation tank by a liquid supply pipe; a first control valve is provided on the liquid supply pipe; the inlet end of the first working pump is connected to the first deionized water tank by a water supply pipe; a second control valve is provided on the water supply pipe; the liquid supply pipe and the water supply pipe are connected to the junction joint.

[0008] Control valves control the flow of pickling and passivation solutions and deionized water. When the pipes require pickling and passivation solutions, the first control valve is opened and the second control valve is closed. The pickling and passivation solutions flow from the first pickling and passivation tank to the first manifold, where the flowing liquid removes impurities from the pipe walls. When deionized water is required for pipe cleaning, the first control valve is closed and the second control valve is opened. Deionized water flows from the first deionized water tank to the first manifold, where the flowing deionized water removes any residual passivation solution. During the cleaning of the first manifold, the first and second control valves can be switched between different cleaning solutions, making the cleaning process simple and convenient.

[0009] Furthermore, an exhaust pipe is provided on the upper portion of the first water collecting pipe, and an exhaust valve is provided on the exhaust pipe.

[0010] Because gas density is lower than liquid density, trapped air in the first manifold will float to the upper portion of the pipe. Installing an exhaust valve in the upper portion of the pipe effectively removes this air, reducing flow resistance within the first manifold and protecting it from deformation and rupture. Furthermore, when cleaning the first manifold, opening the exhaust valve to remove air and then immediately closing it ensures that the cleaning fluid fills the entire manifold, ensuring every corner is cleaned.

[0011] Furthermore, there are multiple exhaust valves on the first water collecting pipe; adjacent exhaust valves are distributed at an angle of 85 degrees to 95 degrees.

[0012] Two adjacent exhaust valves at a specific angle are provided to discharge the accumulated gas at various locations on the first water collection pipe, ensuring that the gas at various locations on the first water collection pipe can be completely discharged without affecting the operation of the pipeline.

[0013] Furthermore, a flange interface is provided at the water outlet of the first water collecting pipe; and the first return pipe flange is connected to the flange interface.

[0014] After the water collection pipeline is cleaned, the pickling and passivation circuit is removed and the pipeline at the flange interface is dried to prevent the pipeline from re-oxidation in a humid environment.

[0015] Furthermore, the first pickling and passivation tank is an open tank; the first deionized water tank is a closed tank.

[0016] The first pickling and passivation tank is designed as an open tank, facilitating real-time monitoring of the pickling and passivation solution concentration in the first reflux pipe during the cleaning process. The enclosed deionized water tank prevents dust and other impurities from entering the tank, ensuring clean, contaminant-free deionized water.

[0017] Furthermore, a second water collection pipe is provided along the edge of the through hole, and the second water collection pipe is located next to the first water collection pipe; the second water collection pipe is provided with a water inlet and a water outlet; the cooler cover water collection pipe pickling and passivation device also includes a second working pump, a second pickling and passivation tank, a second deionized water tank, a second liquid inlet pipe and a second return pipe; a pipe is connected between the inlet end of the second working pump and the second pickling and passivation tank; a pipe is connected between the inlet end of the second working pump and the second deionized water tank; the second liquid inlet pipe is connected between the outlet end of the second working pump and the water inlet of the second water collection pipe; and the second return pipe is connected between the water outlet of the second water collection pipe and the second pickling and passivation tank.

[0018] The second pickling and passivation tank is filled with pickling and passivation liquid, which is used to clean the oil, welding, rust, dust and other impurities on the inner wall of the cooler cover manifold. The second deionized water tank is filled with deionized water, which is used to flush the passivation liquid remaining on the inner wall of the pipe to prevent the introduction of foreign impurities. When cleaning the second manifold, the pickling and passivation liquid or deionized water flows through the pipe to the second working pump, and then enters the second manifold through the second liquid inlet pipe under the pressure of the pump. After the pipe is cleaned, the pickling and passivation liquid or deionized water flows back to the second pickling and passivation tank from the second return pipe. This device does not require the pipe to be immersed in the cleaning tank. It not only effectively solves the problem of large and long pipes that cannot be completely immersed in the cleaning tank, but also avoids direct contact between operators and highly corrosive pickling and passivation liquid, reducing the safety risks of operators.

[0019] Furthermore, the cooler cover water pipe pickling and passivation device includes a third control valve and a fourth control valve; the inlet end of the second working pump has a junction joint; the inlet end of the second working pump is connected to the second pickling and passivation tank with a liquid supply pipe; the third control valve is provided on the liquid supply pipe; the inlet end of the second working pump is connected to the second deionized water tank with a water supply pipe; the fourth control valve is provided on the water supply pipe; the liquid supply pipe and the water supply pipe are connected to the junction joint.

[0020] Control valves control the flow of pickling and passivation solutions and deionized water. When the pipe requires pickling and passivation solution, the third control valve is opened and the fourth control valve is closed. The pickling and passivation solution flows from the second pickling and passivation tank to the second manifold, where the flowing liquid removes impurities from the pipe's inner wall. When deionized water is required for pipe cleaning, the third control valve is closed and the fourth control valve is opened. Deionized water flows from the second deionized water tank to the second manifold, where the flowing deionized water removes any residual passivation solution. During the cleaning of the second manifold, the third and fourth control valves can be switched between different cleaning solutions, making the cleaning process simple and convenient.

[0021] Furthermore, a tee is provided at the outlet end of the second liquid inlet pipe, and the tee has a pair of liquid inlets, one of which is connected to the water inlet at one end of the second water collection pipe through the liquid inlet branch pipe 1; the other liquid inlet is connected to the water inlet at the other end of the second water collection pipe through the liquid inlet branch pipe 2; and a water outlet is provided in the middle of the second water collection pipe.

[0022] The pickling passivation liquid or deionized water enters from both ends of the second water collection pipe and then flows out from the middle of the pipe, so that no dead corners are left during cleaning and the inner wall of the pipe is cleaned more comprehensively.

[0023] Furthermore, a plurality of flanges are provided on the outer wall of the cover; the first liquid inlet pipe includes an inner liquid inlet pipe and an outer liquid inlet pipe; the inner liquid inlet pipe is provided inside the cover, and the outer liquid inlet pipe is provided outside the cover; the inner liquid inlet pipe and the outer liquid inlet pipe are connected to the outer wall of the cover through flanges; the second return pipe includes an inner return pipe and an outer return pipe; the inner return pipe is provided inside the cover, and the outer return pipe is provided outside the cover; the inner return pipe and the outer return pipe are connected to the outer wall of the cover through flanges.

[0024] The flanges connect the pipes inside and outside the cover, making it easy for the cleaning fluid to flow smoothly in the pipes without leakage, ensuring that the water collection pipe can be cleaned normally.

[0025] Beneficial effects

[0026] The utility model discloses a cooler cover manifold pickling and passivation device. By setting control valves on multiple pipes, different cleaning solutions can be switched. The pickling and passivation solution or deionized water flows through the pipes to the manifold under the pressure of a pump. After the inner wall of the manifold is cleaned, the cleaning solution and impurities flow back into the pickling and passivation tank. This device does not require the pipes to be immersed in the cleaning tank. This not only effectively solves the problem of large and long pipes being unable to be completely immersed in the cleaning tank, but also avoids direct contact between operators and highly corrosive pickling and passivation solutions, reducing safety risks for operators. The device has a simple structure, is easy to maintain, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of the connection between the cooler cover water collection pipe pickling and passivation device and the cooler cover;

[0028] Figure 2 This is a structural diagram of the cooler cover manifold pickling and passivation device;

[0029] Figure 3 This is a structural diagram of the pickling and passivation device of the first water collection pipe;

[0030] Figure 4 This is a structural diagram of the pickling and passivation device for the second water collection pipe;

[0031] Figure 5 This is a schematic diagram of the installation of the first control valve and the second control valve;

[0032] Figure 6 This is a schematic diagram of the installation of the third control valve and the fourth control valve;

[0033] Figure 7 Schematic diagram of the exhaust valve structure;

[0034] Figure 8 It is a structural diagram of the flange interface;

[0035] Figure 9 This is an exploded diagram of the connection between the tee pipe and other pipes;

[0036] Figure 10 It is a structural diagram of the flange.

[0037] In the accompanying drawings: 11, cover; 111, through hole; 12, first water collection pipe; 13, second water collection pipe; 21, first working pump; 22, second working pump; 31, first pickling and passivation tank; 32, second pickling and passivation tank; 41, first deionized water tank; 42, second deionized water tank; 51, first liquid inlet pipe; 511, inner liquid inlet pipe; 512, outer liquid inlet pipe; 52, second liquid inlet pipe; 521, inlet Liquid branch pipe 1; 522, liquid inlet branch pipe 2; 53, liquid supply pipe; 54, water supply pipe; 61, first return pipe; 62, second return pipe; 621, internal return pipe; 622, external return pipe; 71, first control valve; 72, second control valve; 73, third control valve; 74, fourth control valve; 75, exhaust valve; 81, tee pipe; 811, liquid inlet; 91, flange interface; 92, flange parts. DETAILED DESCRIPTION

[0038] Example 1

[0039] like Figure 1 、 Figure 2 and Figure 3 As shown, the cooler cover includes a cover body 11; a circular through hole 111 is provided in the center of the cover body 11, and a first water collection pipe 12 is provided along the edge of the through hole 111; the first water collection pipe 12 is provided with a water inlet and a water outlet; the cooler cover water collection pipe pickling and passivation device includes a first working pump 21, a first pickling and passivation tank 31, a first deionized water tank 41, a first liquid inlet pipe 51 and a first return pipe 61; a pipe is connected between the inlet end of the first working pump 21 and the first pickling and passivation tank 31; a pipe is connected between the inlet end of the first working pump 21 and the first deionized water tank 41; the first liquid inlet pipe 51 is connected between the outlet end of the first working pump 21 and the water inlet of the first water collection pipe 12; and the first return pipe 61 is connected between the water outlet of the first water collection pipe 12 and the first pickling and passivation tank 31.

[0040] The first pickling and passivation tank 31 is filled with pickling and passivation liquid, which is used to clean the oil, welding, rust, dust and other impurities on the inner wall of the cooler cover water pipe; the first deionized water tank 41 is filled with deionized water, which is used to flush the passivation liquid remaining on the inner wall of the pipe to prevent the introduction of foreign impurities. When cleaning the water pipe, the pickling and passivation liquid or deionized water flows through the pipe to the first working pump 21, and then enters the first water pipe 12 from the first liquid inlet pipe 51 under the pressure of the pump. After the pipe is cleaned, the pickling and passivation liquid or deionized water flows back to the first pickling and passivation tank 31 from the first return pipe 61. This device does not require the pipe to be immersed in the cleaning tank pool, which not only effectively solves the scene limitation problem that large and long pipes cannot be completely immersed in the cleaning tank pool, but also avoids direct contact between operators and highly corrosive pickling and passivation liquid, reducing the safety risks of operators.

[0041] like Figure 5As shown, the cooler cover water pipe pickling and passivation device includes a first control valve 71 and a second control valve 72; the inlet end of the first working pump 21 has a junction; the inlet end of the first working pump 21 is connected to the first pickling and passivation tank 31. The liquid supply pipe 53 is provided with a first control valve 71; the inlet end of the first working pump 21 is connected to the first deionized water tank 41. The water supply pipe 54 is connected; the second control valve 72 is provided on the water supply pipe 54; the liquid supply pipe 53 and the water supply pipe 54 are connected to the junction.

[0042] The control valves are used to control the flow of pickling and passivation liquid and deionized water. When pickling and passivation liquid is needed for pipeline cleaning, the first control valve 71 is opened and the second control valve 72 is closed. The pickling and passivation liquid flows from the first pickling and passivation tank 31 to the first manifold 12, where the flowing liquid removes impurities from the inner wall of the pipeline. When deionized water is needed for pipeline cleaning, the first control valve 71 is closed and the second control valve 72 is opened. Deionized water flows from the first deionized water tank 41 to the first manifold 12, where the flowing deionized water removes any residual passivation liquid. During the cleaning process of the first manifold 12, different cleaning liquids can be switched by switching the first and second control valves 71 and 72, making the cleaning process simple and convenient.

[0043] like Figure 7 As shown, an exhaust pipe is provided on the upper portion of the first water collecting pipe 12 , and an exhaust valve 75 is provided on the exhaust pipe.

[0044] Because the density of gas is lower than that of liquid, trapped air within the first manifold 12 tends to float to the upper portion of the pipe. Installing an exhaust valve 75 in the upper portion of the pipe effectively removes this air, reducing flow resistance within the first manifold 12 and protecting it from deformation and rupture. Furthermore, during cleaning of the first manifold 12, opening the exhaust valve 75 to remove air and then immediately closing it ensures that the cleaning fluid fills the entire manifold, ensuring that every corner of the pipe is cleaned.

[0045] like Figure 7 As shown, there are multiple exhaust valves 75 on the first water collecting pipe 12; adjacent exhaust valves 75 are distributed at an angle of 85 degrees to 95 degrees.

[0046] Two adjacent exhaust valves 75 are provided at a specific angle to discharge the accumulated gas at various locations on the first water collection pipe 12, ensuring that the gas at various locations on the first water collection pipe 12 can be completely discharged without affecting the operation of the pipeline.

[0047] like Figure 8 As shown, a flange interface 91 is provided at the water outlet of the first water collecting pipe 12 ; the first return pipe 61 is flange-connected to the flange interface 91 .

[0048] After the water collection pipe is cleaned, the pickling and passivation circuit is removed, and compressed air is introduced into the flange interface 91 to dry the pipe of the first water collection pipe 12 to prevent the pipe from being oxidized again in a humid environment.

[0049] like Figure 3 As shown, the first pickling and passivation tank 31 is an open tank; the first deionized water tank 41 is a closed tank.

[0050] The first pickling and passivation tank 31 is configured as an open tank, which facilitates real-time monitoring of the concentration of the pickling and passivation solution in the first reflux pipe 61 during the cleaning process. The enclosed deionized water tank prevents dust and other impurities from entering the tank, ensuring that the deionized water is clean and contaminant-free.

[0051] like Figure 10 As shown, the outer wall of the cover body 11 is provided with a plurality of flanges 92; the first liquid inlet pipe 51 includes an inner liquid inlet pipe 511 and an outer liquid inlet pipe 512; the inner liquid inlet pipe 511 is provided inside the cover body 11, and the outer liquid inlet pipe 512 is provided outside the cover body 11; the inner liquid inlet pipe 511 and the outer liquid inlet pipe 512 are connected to the outer wall of the cover body 11 through the flange 92;

[0052] The flange 92 connects the pipes inside and outside the cover body 11, so that the cleaning liquid can flow smoothly in the pipe without leakage, ensuring that the water collection pipe can be cleaned normally.

[0053] Example 2

[0054] like Figure 1 、 Figure 2 and Figure 4 As shown, the cooler cover includes a cover body 11; a circular through hole 111 is provided in the center of the cover body 11, and a second water collection pipe 13 is provided along the edge of the through hole 111, and the second water collection pipe 13 is located next to the first water collection pipe 12; the second water collection pipe 13 is provided with a water inlet and a water outlet; the cooler cover water collection pipe pickling and passivation device also includes a second working pump 22, a second pickling and passivation tank 32, a second deionized water tank 42, a second liquid inlet pipe 52 and a second return pipe 62; a pipe is connected between the inlet end of the second working pump 22 and the second pickling and passivation tank 32; a pipe is connected between the inlet end of the second working pump 22 and the second deionized water tank 42; a second liquid inlet pipe 52 is connected between the outlet end of the second working pump 22 and the water inlet of the second water collection pipe 13; and a second return pipe 62 is connected between the water outlet of the second water collection pipe 13 and the second pickling and passivation tank 32.

[0055] The second pickling and passivation tank 32 is filled with pickling and passivation liquid, which is used to clean the oil, welding, rust, dust and other impurities on the inner wall of the cooler cover water pipe. The second deionized water tank 42 is filled with deionized water, which is used to flush the passivation liquid remaining on the inner wall of the pipe to prevent the introduction of foreign impurities. When cleaning the second water pipe 13, the pickling and passivation liquid or deionized water flows through the pipe to the second working pump 22, and then enters the second water pipe 13 from the second liquid inlet pipe 52 under the pressure of the pump. After the pipeline is cleaned, the pickling and passivation liquid or deionized water flows back to the second pickling and passivation tank 32 from the second return pipe 62. This device does not need to immerse the pipeline in the cleaning tank pool, which not only effectively solves the scene limitation problem that large and long pipelines cannot be completely immersed in the cleaning tank pool, but also avoids direct contact between operators and highly corrosive pickling and passivation liquid, reducing the safety risks of operators.

[0056] like Figure 6 As shown, the cooler cover water pipe pickling and passivation device includes a third control valve 73 and a fourth control valve 74; the inlet end of the second working pump 22 has a junction; the inlet end of the second working pump 22 and the second pickling and passivation tank 32 are connected to the liquid supply pipe 53; the third control valve 73 is provided on the liquid supply pipe 53; the inlet end of the second working pump 22 and the second deionized water tank 42 are connected to the water supply pipe 54; the fourth control valve 74 is provided on the water supply pipe 54; the liquid supply pipe 53 and the water supply pipe 54 are connected to the junction.

[0057] The control valves are used to control the flow of pickling and passivation liquid and deionized water. When the pipes require pickling and passivation liquid for cleaning, the third control valve 73 is opened and the fourth control valve 74 is closed. The pickling and passivation liquid flows from the second pickling and passivation tank 32 to the second manifold 13, where the flowing liquid removes impurities such as those on the inner wall of the pipes. When deionized water is required for cleaning the pipes, the third control valve 73 is closed and the fourth control valve 74 is opened. Deionized water flows from the second deionized water tank 42 to the second manifold 13, where the flowing deionized water removes any residual passivation liquid. During the cleaning of the second manifold 13, different cleaning liquids can be switched by switching the third and fourth control valves 73 and 74, making the cleaning process simple and convenient.

[0058] like Figure 9 As shown, a tee pipe 81 is provided at the outlet end of the second liquid inlet pipe 52, and the tee pipe 81 has a pair of liquid inlets 811, one of which is connected to the water inlet at one end of the second water collection pipe 13 through the liquid inlet branch pipe 1 521; the other liquid inlet 811 is connected to the water inlet at the other end of the second water collection pipe 13 through the liquid inlet branch pipe 2 522; a water outlet is provided in the middle of the second water collection pipe 13.

[0059] The pickling passivation liquid or deionized water enters from both ends of the second water collecting pipe 13 and then flows out from the middle of the pipe, so that no dead corners are left during cleaning and the inner wall of the pipe is cleaned more comprehensively.

[0060] like Figure 10 As shown, the outer wall of the cover body 11 is provided with multiple flanges 92; the second return pipe 62 includes an inner return pipe 621 and an outer return pipe 622; the inner return pipe 621 is provided inside the cover body 11, and the outer return pipe 622 is provided outside the cover body 11; the inner return pipe 621 and the outer return pipe 622 are connected to the outer wall of the cover body 11 through the flange 92.

[0061] The flange 92 connects the pipes inside and outside the cover body 11, so that the cleaning liquid can flow smoothly in the pipe without leakage, ensuring that the water collection pipe can be cleaned normally.

Claims

1. Cooler cover water pipe pickling and passivation device, characterized by: The cooler cover comprises a cover body (11); a circular through hole (111) is provided in the center of the cover body (11), and a first water collection pipe (12) is provided along the edge of the through hole (111); the first water collection pipe (12) is provided with a water inlet and a water outlet; the cooler cover water collection pipe pickling and passivation device comprises a first working pump (21), a first pickling and passivation tank (31), a first deionized water tank (41), a first liquid inlet pipe (51) and a first return pipe (61); a pipe is connected between the inlet end of the first working pump (21) and the first pickling and passivation tank (31); a pipe is connected between the inlet end of the first working pump (21) and the first deionized water tank (41); a first liquid inlet pipe (51) is connected between the outlet end of the first working pump (21) and the water inlet of the first water collection pipe (12); and a first return pipe (61) is connected between the water outlet of the first water collection pipe (12) and the first pickling and passivation tank (31).

2. The cooler cover manifold pickling and passivation device according to claim 1, characterized in that: The invention comprises a first control valve (71) and a second control valve (72); the inlet end of the first working pump (21) has a junction; the inlet end of the first working pump (21) and the first pickling passivation tank (31) are connected to a liquid supply pipe (53); the first control valve (71) is provided on the liquid supply pipe (53); the inlet end of the first working pump (21) and the first deionized water tank (41) are connected to a water supply pipe (54); the second control valve (72) is provided on the water supply pipe (54); the liquid supply pipe (53) and the water supply pipe (54) are connected to the junction.

3. The cooler cover manifold pickling and passivation device according to claim 1, characterized in that: An exhaust pipe is provided on the upper portion of the first water collecting pipe (12), and an exhaust valve (75) is provided on the exhaust pipe.

4. The cooler cover water pipe pickling and passivation device according to claim 3 is characterized in that: The first water collecting pipe (12) is provided with a plurality of exhaust valves (75); adjacent exhaust valves (75) are distributed at an angle of 85 to 95 degrees.

5. The cooler cover manifold pickling and passivation device according to claim 1, characterized in that: A flange interface (91) is provided at the water outlet of the first water collecting pipe (12); the first return pipe (61) is flange-connected to the flange interface (91).

6. The cooler cover manifold pickling and passivation device according to claim 1, characterized in that: The first pickling and passivation tank (31) is an open tank; the first deionized water tank (41) is a closed tank.

7. The cooler cover manifold pickling and passivation device according to claim 1, characterized in that: A second water collection pipe (13) is also provided along the edge of the through hole (111), and the second water collection pipe (13) is located next to the first water collection pipe (12); the second water collection pipe (13) is provided with a water inlet and a water outlet; the cooler cover water collection pipe pickling and passivation device also includes a second working pump (22), a second pickling and passivation tank (32), a second deionized water tank (42), a second liquid inlet pipe (52) and a second return pipe (62); a pipe is connected between the inlet end of the second working pump (22) and the second pickling and passivation tank (32); a pipe is connected between the inlet end of the second working pump (22) and the second deionized water tank (42); a second liquid inlet pipe (52) is connected between the outlet end of the second working pump (22) and the water inlet of the second water collection pipe (13); and a second return pipe (62) is connected between the water outlet of the second water collection pipe (13) and the second pickling and passivation tank (32).

8. The cooler cover manifold pickling and passivation device according to claim 7, characterized in that: The invention comprises a third control valve (73) and a fourth control valve (74); the inlet end of the second working pump (22) has a junction; the inlet end of the second working pump (22) and the second pickling passivation tank (32) are connected to a liquid supply pipe (53); the third control valve (73) is provided on the liquid supply pipe (53); the inlet end of the second working pump (22) and the second deionized water tank (42) are connected to a water supply pipe (54); the fourth control valve (74) is provided on the water supply pipe (54); the liquid supply pipe (53) and the water supply pipe (54) are connected to the junction.

9. The cooler cover manifold pickling and passivation device according to claim 7, characterized in that: The outlet end of the second liquid inlet pipe (52) is provided with a three-way pipe (81), and the three-way pipe (81) has a pair of liquid inlets (811), one of which is connected to the water inlet at one end of the second water collection pipe (13) through the first liquid inlet pipe (521); the other liquid inlet (811) is connected to the water inlet at the other end of the second water collection pipe (13) through the second liquid inlet pipe (522); and a water outlet is provided in the middle of the second water collection pipe (13).

10. The cooler cover manifold pickling and passivation device according to claim 7, characterized in that: The outer wall of the cover body (11) is provided with a plurality of flanges (92); the first liquid inlet pipe (51) includes an inner liquid inlet pipe (511) and an outer liquid inlet pipe (512); the inner liquid inlet pipe (511) is provided inside the cover body (11), and the outer liquid inlet pipe (512) is provided outside the cover body (11); the inner liquid inlet pipe (511) and the outer liquid inlet pipe (512) are connected to the outer wall of the cover body (11) via the flange (92); the second return pipe (62) includes an inner return pipe (621) and an outer return pipe (622); the inner return pipe (621) is provided inside the cover body (11), and the outer return pipe (622) is provided outside the cover body (11); the inner return pipe (621) and the outer return pipe (622) are connected to the outer wall of the cover body (11) via the flange (92).

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