Water absorption mechanism and circulating device for welding conveying line

Abstract

The utility model discloses a kind of water suction mechanism and circulating device for welding conveying line, water suction mechanism is installed on welding conveying line, clamp tool with water receiving groove is movably connected on welding conveying line, including at least one water suction pipe, water suction pipe is used to suck the water in water receiving groove;Position adjusting assembly, position adjusting assembly is connected to water suction pipe, for adjusting the horizontal position and height position of water suction pipe;And a fixed component, position adjusting assembly is connected to welding conveying line by fixed component.The utility model not only can suck the water in water receiving groove on clamp tool, reduce the water in water receiving groove, and will not cause immersion and water spray to welding conveying line, so that the component on welding conveying line avoids to meet water and causes corrosion and rust, and then influence service life and sensitivity.

Description

Technical Field

[0001] This utility model relates to a water absorption mechanism and circulation device for a welding conveyor line. Background Technology

[0002] Chain conveyor lines, also known as chain conveyor lines, are devices that use chains as traction and load-bearing components to transport materials. The chains can be ordinary roller conveyor chains or high-speed chains. These conveyor lines primarily transport pallets, large turnover boxes, and are widely used in assembly line conveying equipment.

[0003] In existing conveyor lines, when conveying welded products, the products need to be protected by water. During the water injection and conveying process, the conveyor line is easily soaked and splashed with water, which prevents the components on the welding conveyor line from coming into contact with water, causing corrosion and rust, and thus affecting the service life and sensitivity. Utility Model Content

[0004] The purpose of this utility model is to provide a technical solution for a water suction mechanism and circulation device for welding conveyor lines, addressing the shortcomings of existing technologies. This solution not only absorbs water from the water receiving tank on the fixture, reducing the amount of water in the tank, but also prevents immersion and water spraying on the welding conveyor line. This avoids corrosion and rust on components on the welding conveyor line, thus protecting their service life and sensitivity. Simultaneously, water is transported to the nitrogen-filling water replenishment mechanism via a water storage tank to replenish the water storage tank on the fixture, providing cooling protection for the welded products. Water overflowing during replenishment flows into an overflow tank, then into the receiving tank for collection. The water suction mechanism absorbs water from the receiving tank, which flows into the suction tank, and then into the storage tank via a guide pipe, achieving water recycling, reducing water waste, and meeting the requirements of automated welding production lines.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A water-absorbing mechanism for a welding conveyor line, wherein the water-absorbing mechanism is installed on the welding conveyor line, and a fixture with a water-receiving trough is movably connected to the welding conveyor line, characterized in that: it includes...

[0007] At least one suction pipe fitting is used to draw water from the water receiving tank;

[0008] A position adjustment component is connected to the suction pipe and is used to adjust the horizontal and vertical positions of the suction pipe.

[0009] A fixed component is provided, and the position adjustment component is connected to the welding conveyor line through the fixed component. Through the design of the above structure, not only can the water in the water tank on the fixture be absorbed, reducing the water in the water tank, but it will also prevent the welding conveyor line from being soaked or splashed with water, so that the components on the welding conveyor line are protected from water contact that could cause corrosion and rust, thereby affecting the service life and sensitivity.

[0010] Furthermore, the water suction fitting includes a water suction pipe and a water suction connector. The water suction connector is connected to the outlet end of the water suction pipe. The water suction pipe can be easily connected to an external water suction tank through the water suction connector, so that water in the water receiving tank can be drawn through the water suction pipe. This avoids excessive water in the water receiving tank from immersing or splashing water on the components on the welding conveyor line during the transportation process, which would affect their service life. The water suction pipe can be L-shaped or arc-shaped, and its interior is hollow. The cross-section of the water suction pipe adopts a square structure.

[0011] Furthermore, the position adjustment assembly includes a horizontal adjustment component, a vertical adjustment component, and a clamping component. The water suction pipe is connected to the horizontal adjustment component via the clamping component, and the horizontal adjustment component is connected to the fixing component via the vertical adjustment component. The horizontal adjustment component is used to adjust the horizontal position of the water suction pipe to meet the requirement that the water suction pipe extends into or out of the water receiving trough in the horizontal direction. The vertical adjustment component is used to adjust the vertical height position of the water suction pipe to meet the requirement that the water suction pipe extends into or out of the water receiving trough in the vertical direction, thereby avoiding collision between the water suction pipe and the water receiving trough during the process of extending into or out of the water receiving trough, and improving the safety and reliability during use.

[0012] Furthermore, the clamping component includes a fixing block and a locking block. The locking block is detachably connected to the fixing block. The fixing block and the locking block are respectively provided with a first locking groove and a second locking groove. The first locking groove and the second locking groove cooperate to engage the water suction pipe. When the water suction pipe is placed in the first locking groove, the locking block is fixed on the fixing block, so that the second locking groove engages with the water suction pipe, thereby realizing the fixed installation of the water suction pipe and preventing shaking during the water suction process, which would affect the water suction effect.

[0013] Furthermore, the horizontal adjustment component includes a first cylinder, a first piston rod, and a horizontal booster block. The first cylinder is connected to the horizontal booster block via the first piston rod, and the horizontal booster block is connected to a fixed block. The horizontal booster block is symmetrically provided with first guide rods on both sides of the first piston rod. The first guide rods are movably connected to the first cylinder. The first cylinder drives the first piston rod to move, which in turn drives the horizontal booster block to move, thereby achieving synchronous horizontal movement of the clamping component and the water suction pipe. The first guide rods improve the stability and reliability of the clamping component and the water suction pipe during movement. The first cylinder can be a pneumatic cylinder or a hydraulic cylinder.

[0014] Furthermore, the vertical adjustment component includes a second cylinder, a second piston rod, and a vertical booster block. The second cylinder is connected to the vertical booster block via the second piston rod. A base plate is provided on the vertical booster block, and the base plate is connected to the first cylinder. Second guide rods are symmetrically provided on both sides of the second piston rod on the vertical booster block. The second guide rods are movably connected to the second cylinder. The second cylinder drives the second piston rod to move, which in turn drives the vertical booster block to move in the vertical direction, realizing the synchronous vertical movement of the clamping component and the water suction pipe, adjusting the height position of the water suction pipe, and ensuring that water is sucked from the water receiving tank. The second guide rods improve the stability and reliability of the vertical booster block during movement. The second cylinder can be a pneumatic cylinder or a hydraulic cylinder.

[0015] Furthermore, the fixing components include a mounting base, a support plate, and a mounting block. The mounting base is connected to the mounting block via the support plate. The mounting base is connected to a position adjustment component, and the mounting block is connected to a welding conveyor line. Through the design of the mounting base, support plate, and mounting block, the stability and reliability of the entire water suction mechanism can be greatly improved, thereby improving the stability during water suction.

[0016] A circulation device includes a nitrogen-filling and water-replenishing mechanism located on a welding conveyor line. The device further includes a water suction tank, a water storage tank, and a water suction mechanism for the welding conveyor line as described above. The water suction tank is connected to the water storage tank via a guide pipe, and the water suction tank is connected to the water suction mechanism. The water storage tank is connected to the nitrogen-filling and water-replenishing mechanism. Water is transported from the water storage tank to the nitrogen-filling and water-replenishing mechanism to replenish water in the water storage tank on the fixture, providing cooling protection for the welded products. Water overflowing during replenishment flows into an overflow tank and then into a receiving tank for collection. The water suction mechanism absorbs water from the receiving tank and flows it into the water suction tank, then into the water storage tank via the guide pipe, thus achieving water recycling, reducing water waste, and meeting the requirements of the welding product assembly line production.

[0017] Furthermore, the water suction tank is connected to the water suction mechanism via a return pipe. A water suction pump is installed on the return pipe, which can draw water from the water receiving tank and allow it to flow into the water suction tank through the return pipe.

[0018] Furthermore, the water storage tank is connected to the nitrogen filling and water replenishment mechanism via a circulation pipe. A circulation water pump is installed on the circulation pipe, which can pump water from the water storage tank into the nitrogen filling and water replenishment mechanism to replenish the water storage tank.

[0019] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0020] 1. This utility model can not only absorb water from the water receiving tank on the fixture, reducing the amount of water in the tank, but also prevent the welding conveyor line from being soaked or splashed with water, thus preventing the components on the welding conveyor line from coming into contact with water and causing corrosion and rust, thereby affecting their service life and sensitivity.

[0021] 2. This utility model uses a water storage tank to transport water to a nitrogen filling and water replenishment mechanism, which can replenish water to the water storage tank on the fixture tooling, cool and protect the welded products. Water overflowing during replenishment can flow into an overflow tank, then into a receiving tank for collection. The suction mechanism sucks the water from the receiving tank and flows it into a suction tank, and then into the water storage tank through a guide pipe, realizing water recycling, reducing water waste, and meeting the production line requirements of welded products. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the water absorption mechanism in the water absorption mechanism and circulation device for a welding conveyor line according to this utility model;

[0024] Figure 2 for Figure 1 Schematic diagram of the structure in direction A;

[0025] Figure 3 This is a schematic diagram of the mounting bracket in this utility model;

[0026] Figure 4 This is a schematic diagram of the connection structure of the water absorption mechanism, the nitrogen filling and water replenishment mechanism, and the welding conveyor line in this utility model;

[0027] Figure 5 This is a schematic diagram of the connection of the circulation device in this utility model;

[0028] Figure 6 This is a schematic diagram of the nitrogen filling and water replenishment mechanism in this utility model;

[0029] Figure 7 This is a schematic diagram of the nitrogen-filling component in this utility model;

[0030] Figure 8 for Figure 7 A schematic diagram of the vertical cross-section;

[0031] Figure 9 This is a schematic diagram showing the connection between the nitrogen filling connector, the rubber nozzle, and the positioning part in this utility model;

[0032] Figure 10 This is a schematic diagram of the fixture in this utility model.

[0033] In the diagram: 1-Suction pipe; 2-Suction connector; 3-Clamping component; 4-Horizontal booster block; 5-First cylinder body; 6-First piston rod; 7-First guide rod; 8-Second cylinder body; 9-Base plate; 10-Second piston rod; 11-Second guide rod; 12-Mounting seat; 13-Support plate; 14-Mounting block; 15-Vertical booster block; 16-Fixing block; 17-Clamping block; 18-First slot; 19-Second slot; 20-Nitrogen filling and water replenishment mechanism; 21-Clamping fixture; 22-Welding conveyor line; 23-Suction tank; 24-Water storage tank; 25-Return pipe; 26-Circulation pipe; 27-Circulating water pump;

[0034] 28-Water supply assembly; 2801-Third cylinder block; 2802-Horizontal pipe; 2803-Water supply connector; 2804-Water supply hose;

[0035] 29-Nitrogen filling assembly; 2901-Fourth cylinder block; 2902-Nitrogen filling plate; 2903-Nitrogen filling connector; 2904-Rubber nozzle; 2905-Acceleration channel; 2906-Positioning part; 2907-Seal;

[0036] 30-Water storage tank; 31-Overflow tank; 32-Water receiving tank; 33-Drainage pipe; 34-First fixing plate; 35-Second fixing plate; 36-First bracket; 37-Second bracket. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0039] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0040] like Figures 1 to 3As shown, this utility model discloses a water absorption mechanism for a welding conveyor line 22. The water absorption mechanism is installed on the welding conveyor line 22, and a fixture 21 with a water receiving tank 32 is movably connected to the welding conveyor line 22. Figure 10 As shown, the fixture 21 includes a water storage tank 30 for placing the welding products. The water storage tank 30 is filled with water to protect the welding products. An overflow trough is provided on the outside of the water storage tank 30 to receive water overflowing from the water storage tank 30. During the water filling process, the water in the overflow trough can flow into the water receiving trough 32 to avoid the welding conveyor line 22 being submerged or splashed with water.

[0041] The water suction mechanism includes at least one water suction pipe, a position adjustment component, and a fixing component. This application uses one water suction pipe as an example for illustration.

[0042] One suction pipe is used to draw water from the water receiving tank 32. The suction pipe includes a suction pipe 1 and a suction connector 2. The suction connector 2 is connected to the outlet end of the suction pipe 1. The suction pipe 1 can be connected to the external suction tank 23 through the suction connector 2, so that the water in the water receiving tank 32 can be drawn through the suction pipe 1. This avoids the water in the water receiving tank 32 from being soaked and splashed on the components on the welding conveyor line 22 during the transportation process, which would affect their service life. The suction pipe 1 can be L-shaped or arc-shaped, and its interior is hollow. The cross-section of the suction pipe 1 adopts a square structure.

[0043] The position adjustment component is connected to the suction pipe and is used to adjust the horizontal and vertical positions of the suction pipe.

[0044] The position adjustment assembly includes a horizontal adjustment component, a vertical adjustment component, and a clamping component 3. The water suction pipe 1 is connected to the horizontal adjustment component via the clamping component 3. The horizontal adjustment component is connected to the fixing component via the vertical adjustment component. The horizontal adjustment component is used to adjust the horizontal position of the water suction pipe 1 to meet the requirement that the water suction pipe 1 extends into or out of the water receiving trough 32 in the horizontal direction. The vertical adjustment component is used to adjust the vertical height position of the water suction pipe 1 to meet the requirement that the water suction pipe 1 extends into or out of the water receiving trough 32 in the vertical direction. This avoids collision between the water suction pipe 1 and the water receiving trough 32 during the process of extending into or out of the water receiving trough 32, thereby improving the safety and reliability during use.

[0045] The clamping component 3 includes a fixing block 16 and a locking block 17. The locking block 17 is detachably connected to the fixing block 16. The fixing block 16 and the locking block 17 are respectively provided with a first locking groove 18 and a second locking groove 19. The first locking groove 18 and the second locking groove 19 cooperate to lock the water suction pipe 1. When the water suction pipe 1 is placed in the first locking groove 18, the locking block 17 is fixed on the fixing block 16, so that the second locking groove 19 is locked on the water suction pipe 1, thereby realizing the fixed installation of the water suction pipe 1 and preventing it from shaking during the water suction process, which would affect the water suction effect.

[0046] The horizontal adjustment component includes a first cylinder 5, a first piston rod 6, and a horizontal booster block 4. The first cylinder 5 is connected to the horizontal booster block 4 via the first piston rod 6. The horizontal booster block 4 is connected to the fixed block 16. The horizontal booster block 4 is symmetrically provided with first guide rods 7 on both sides of the first piston rod 6. The first guide rods 7 are movably connected to the first cylinder 5. The first cylinder 5 drives the first piston rod 6 to move, which in turn drives the horizontal booster block 4 to move, thereby realizing the synchronous horizontal movement of the clamping component 3 and the suction pipe 1. The first guide rods 7 improve the stability and reliability of the clamping component 3 and the suction pipe 1 during movement. The first cylinder 5 can be a pneumatic cylinder or a hydraulic cylinder.

[0047] The vertical adjustment component includes a second cylinder 8, a second piston rod 10, and a vertical booster block 15. The second cylinder 8 is connected to the vertical booster block 15 via the second piston rod 10. The vertical booster block 15 is provided with a base plate 9, which is connected to the first cylinder 5. The vertical booster block 15 is symmetrically provided with second guide rods 11 on both sides of the second piston rod 10. The second guide rods 11 are movably connected to the second cylinder 8. The second cylinder 8 drives the second piston rod 10 to move, which in turn drives the vertical booster block 15 to move in the vertical direction, realizing the synchronous vertical movement of the clamping component 3 and the water suction pipe 1, adjusting the height position of the water suction pipe 1, and ensuring that water is sucked from the water receiving tank 32. The second guide rods 11 improve the stability and reliability of the vertical booster block 15 during movement. The second cylinder 8 can be a pneumatic cylinder or a hydraulic cylinder.

[0048] The position adjustment component is connected to the welding conveyor line 22 via a fixing component.

[0049] The fixing components include a mounting base 12, a support plate 13, and a mounting block 14. The mounting base 12 is connected to the mounting block 14 via the support plate 13. The mounting base 12 is connected to a position adjustment component, and the mounting block 14 is connected to the welding conveyor line 22. Through the design of the mounting base 12, the support plate 13, and the mounting block 14, the stability and reliability of the entire water suction mechanism installation can be greatly improved, thereby improving the stability during water suction.

[0050] Through the design of the above structure, not only can the water in the water tank 32 on the fixture 21 be absorbed, reducing the water in the water tank 32, but it will also prevent the welding conveyor line 22 from being soaked or splashed with water, thus preventing the components on the welding conveyor line 22 from coming into contact with water and causing corrosion and rust, thereby affecting the service life and sensitivity.

[0051] like Figures 4 to 7 As shown, this utility model provides a circulation device, which includes a nitrogen filling and water replenishment mechanism 20, which is installed on the welding conveyor line 22. It also includes a water suction tank 23, a water storage tank 24, and a water suction mechanism for the welding conveyor line 22 as described above. The water suction tank 23 is connected to the water storage tank 24 through a guide pipe 33.

[0052] The nitrogen filling and water replenishment mechanism 20 in this application includes a nitrogen filling component 29, a water replenishment component 28, a first fixing plate 34, a second fixing plate 35, a first bracket 36, and a second bracket 37. The nitrogen filling component 29 is connected to the first fixing plate 34 through the second bracket 37, and the water replenishment component 28 is connected to the second fixing plate 35 through the first bracket 36. The second fixing plate 35 is fixedly connected to the first fixing plate 34.

[0053] like Figure 8 and Figure 9 As shown, the nitrogen filling assembly 29 includes a nitrogen filling plate 2902 and a nitrogen filling connector 2903 mounted on the nitrogen filling plate 2902. The nitrogen filling plate 2902 has positioning holes that penetrate through it and are located at both ends. The nitrogen filling connector 2903 has a positioning part 2906, which is specifically a ring formed by a protrusion on the surface of the nitrogen filling connector 2903. When the nitrogen filling connector 2903 is mounted on the nitrogen filling plate 2902, it passes through the positioning holes, allowing nitrogen to be filled. The positioning part 2906 on the head 2903 abuts against the end face of the nitrogen filling plate 2902 to achieve positioning connection between the two and fix the connection with screws. A rubber nozzle 2904 is installed at one end of the nitrogen filling connector 2903. The medium enters the interior of the nitrogen filling component through the nitrogen filling connector 2903 and the rubber nozzle 2904. The nitrogen filling connector 2903 is provided with a medium channel, which includes an acceleration channel 2905 with a constricted shape. Nitrogen gas enters the acceleration channel 2905 through the medium channel to increase the nitrogen gas flow rate.

[0054] To improve the sealing of the connection between the two, a seal 2907 is installed at the connection between the nitrogen filling connector 2903 and the rubber nozzle 2904. The seal 2907 acts as a buffer seal to prevent nitrogen leakage and improve the nitrogen filling effect.

[0055] The nitrogen filling assembly 29 also includes a fourth cylinder 2901, the piston rod of which is connected to the nitrogen filling plate 2902, and the fourth cylinder 2901 is connected to the second bracket 37.

[0056] The water replenishment assembly 28 includes a third cylinder 2801, a horizontal pipe 2802, a water replenishment connector 2803, and a water replenishment pipe 2804. The horizontal pipe 2802 is mounted on the third cylinder 2801, the water replenishment connector 2803 is mounted on the horizontal pipe 2802, and the water replenishment pipe 2804 is connected to the water replenishment connector 2803. The third cylinder 2801 drives the water replenishment pipe 2804 to move to fill the cooling medium, which can reduce the temperature during the welding process and protect the welded product.

[0057] The water suction tank 23 is connected to the water suction mechanism through the return pipe 25. The return pipe 25 is equipped with a water suction pump, which can draw water from the water receiving tank 32 and flow into the water suction tank 23 through the return pipe 25.

[0058] The water storage tank 24 is connected to the nitrogen filling and water replenishment mechanism 20 through the circulation pipe 26. The circulation pipe 26 is equipped with a circulation water pump 27. The circulation water pump 27 can input the water in the water storage tank 24 into the nitrogen filling and water replenishment mechanism 20 through the circulation pipe 26 to replenish the water storage tank 30.

[0059] Water is transported to the nitrogen filling and water replenishment mechanism 20 through the water storage tank 24, which can replenish the water storage tank 30 on the fixture 21 to cool and protect the welded products. Water overflowing during replenishment can flow into the overflow tank 31 and then into the receiving tank 32 for collection. The water suction mechanism sucks the water in the receiving tank 32 and flows into the suction tank 23, and then into the water storage tank 24 through the guide pipe 33, realizing the recycling of water, reducing the waste of water resources, and meeting the production line requirements of welded products.

[0060] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to achieve essentially the same technical effect are all covered within the protection scope of this utility model.

Claims

1. A water-absorbing mechanism for a welding conveyor line, wherein the water-absorbing mechanism is installed on the welding conveyor line, and a fixture with a water-receiving trough is movably connected to the welding conveyor line, characterized in that: include At least one suction pipe for drawing water from the water receiving tank; A position adjustment component, connected to the water suction pipe, is used to adjust the horizontal and vertical positions of the water suction pipe. A fixing component is provided, wherein the position adjustment component is connected to the welding conveyor line via the fixing component.

2. The water absorption mechanism for a welding conveyor line according to claim 1, characterized in that: The water suction fitting includes a water suction pipe and a water suction connector, wherein the water suction connector is connected to the outlet end of the water suction pipe.

3. The water absorption mechanism for a welding conveyor line according to claim 1, characterized in that: The position adjustment assembly includes a horizontal adjustment component, a vertical adjustment component, and a clamping component. The water suction pipe is connected to the horizontal adjustment component through the clamping component, and the horizontal adjustment component is connected to the fixing assembly through the vertical adjustment component.

4. The water absorption mechanism for a welding conveyor line according to claim 3, characterized in that: The clamping component includes a fixing block and a locking block. The locking block is detachably connected to the fixing block. The fixing block and the locking block are respectively provided with a first locking groove and a second locking groove. The first locking groove and the second locking groove cooperate to lock the water suction pipe.

5. A water-absorbing mechanism for a welding conveyor line according to claim 4, characterized in that: The horizontal adjustment component includes a first cylinder, a first piston rod, and a horizontal booster block. The first cylinder is connected to the horizontal booster block via the first piston rod. The horizontal booster block is connected to the fixed block. First guide rods are symmetrically arranged on both sides of the first piston rod on the horizontal booster block. The first guide rods are movably connected to the first cylinder.

6. A water-absorbing mechanism for a welding conveyor line according to claim 5, characterized in that: The vertical adjustment component includes a second cylinder, a second piston rod, and a vertical booster block. The second cylinder is connected to the vertical booster block via the second piston rod. A base plate is provided on the vertical booster block, and the base plate is connected to the first cylinder. Second guide rods are symmetrically provided on both sides of the second piston rod on the vertical booster block, and the second guide rods are movably connected to the second cylinder.

7. A water-absorbing mechanism for a welding conveyor line according to claim 1, characterized in that: The fixing component includes a mounting base, a support plate, and a mounting block. The mounting base is connected to the mounting block via the support plate. The mounting base is connected to the position adjustment component, and the mounting block is connected to the welding conveyor line.

8. A circulation device, comprising a nitrogen filling and water replenishment mechanism, wherein the nitrogen filling and water replenishment mechanism is disposed on the welding conveyor line, characterized in that: It also includes a water suction tank, a water storage tank, and a water suction mechanism for a welding conveyor line as described in any one of claims 1 to 7, wherein the water suction tank is connected to the water storage tank via a guide pipe, the water suction tank is connected to the water suction mechanism, and the water storage tank is connected to the nitrogen filling and water replenishment mechanism.

9. A circulation device according to claim 8, characterized in that: The water suction tank is connected to the water suction mechanism via a return pipe, and a water suction pump is installed on the return pipe.

10. A circulation device according to claim 8, characterized in that: The water storage tank is connected to the nitrogen filling and water replenishment mechanism via a circulation pipe, and a circulation water pump is installed on the circulation pipe.

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