Static casting cooling water tank

Abstract

The utility model discloses a static casting cooling water tank which comprises a lower-layer water tank, an upper-layer water tank, a water inlet part and a drainage pipe, an upper water tank body of the upper-layer water tank is located above a lower water tank body of the lower-layer water tank, a workpiece is placed in the upper water tank body, and the water inlet part comprises a main water inlet pipe, a main water inlet pipe and an annular water inlet part. The main water inlet part comprises a main water inlet pipe, one end of the main water inlet pipe is connected with the main water inlet pipe, and the other end of the main water inlet pipe sequentially penetrates through the lower water tank main body and the upper water tank main body from the lower part of the lower water tank main body and enters the upper water tank main body; the universal nozzles are mounted on the annular water inlet pipe at intervals, and the annular water inlet pipe is arranged in the upper water tank main body. The water level in the upper-layer water tank can be adjusted, the two water pipes are arranged and are suitable for solid tile blanks and hollow tile blanks respectively, cooling is efficient, and the device is suitable for fixing annular water inlet pipes with different annular diameters; the use is simple, safe and reliable.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of casting cooling water tank, concretely is a kind of static casting cooling water tank. BACKGROUND

[0002] Casting is a kind of metal processing technology, by pouring molten metal (such as babbitt alloy etc.) into casting (tile blank), after cooling, the part or product of required shape is formed. In order to improve casting efficiency, the casting water tank can be used to cool the casting. The traditional static casting water tank is brick-built pool, and is in the form of platform, and the static casting water level is observed manually during casting. The start-stop of water pump and the opening-closing of drainage valve are adjusted according to the current water level to control the water level. Sometimes, the person needs to stand on the platform to cast. Obviously, the above-mentioned existing brick-built pool has high technical requirements for the person, and the worker's workload is large, which is not safe. The space occupied by the four corners of the brick-built pool delays the rising of the water level, that is, the speed of cooling is delayed, and the casting cooling time is long. SUMMARY

[0003] In view of the above problems existing in the prior art, the utility model aims at providing a static casting cooling water tank. The water level adjusting assembly can adjust the water level in the upper water tank, is suitable for cooling casting pieces of different thicknesses, reduces the labor intensity of workers, and sets two groups of water pipes, which are suitable for cooling solid tile blanks and hollow tile blanks respectively while ensuring that the cooling pressure of each meets the cooling needs, realizes efficient cooling, and the switching of the two groups of water pipes is simple and convenient. The water pipe fixing piece has universality and is suitable for fixing annular water inlets of different diameters. The cooling water tank is simple to use, safe and reliable.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A static casting cooling water tank, comprising a lower water tank, an upper water tank, a water inlet part and a drain pipe, the upper water tank comprises an upper water tank body, the upper water tank body is a container without an upper cover, the lower water tank comprises a lower water tank body, the lower water tank body is a container without an upper cover, the upper water tank body is located above the lower water tank body, the circumference of the upper water tank body does not exceed the circumference of the lower water tank body, and a workpiece to be cast and cooled is placed in the upper water tank body for cooling, the water inlet part comprises a total water inlet pipe, a main water inlet pipe and an annular water inlet part, one end of the main water inlet pipe is connected to the total water inlet pipe, the other end of the main water inlet pipe passes through the bottom plate of the lower water tank body and the bottom plate of the upper water tank body from below to above and then enters the upper water tank body, the annular water inlet part comprises a secondary water inlet pipe, an annular water inlet pipe and a plurality of universal nozzles, one end of the secondary water inlet pipe is connected to the total water inlet pipe, the other end of the secondary water inlet pipe is connected to the annular water inlet pipe, the annular water inlet pipe is an annular water pipe, and the plurality of universal nozzles are installed on the annular water inlet pipe at intervals. The annular water inlet pipe is arranged in the upper water tank body.

[0006] As a further improvement of the above technical scheme:

[0007] The main water inlet pipe is detachably connected to the end of the upper tank main body, and a through hole is arranged on the cover plate, and the diameter of the through hole is smaller than the diameter of the main water inlet pipe.

[0008] The annular water inlet pipe is fixed to the bottom plate of the upper tank main body by a water pipe fixing part, the water pipe fixing part is arranged in a plurality of intervals along the circumferential direction of the annular water inlet pipe, the water pipe fixing part comprises a pipe clamp and a sliding rail, the sliding rail is fixedly installed on the bottom plate of the upper tank main body, and the pipe clamp is slidably arranged on the sliding rail and can clamp the annular water inlet pipe, and the sliding rails of the plurality of water pipe fixing parts are arranged radially around the same center.

[0009] The secondary water inlet pipe is connected to the annular water inlet pipe by a rubber pipe.

[0010] The circumferential side wall of the upper tank main body is provided with at least one gap arranged at intervals, and the cooling tank further comprises a water level adjusting assembly for adjusting the opening of the gap to adjust the water level in the upper tank main body.

[0011] Each gap on the upper tank main body is adjusted by one water level adjusting assembly, and the water level adjusting assembly comprises a sliding plate and an adjusting valve, the sliding plate is located at the gap on the side wall of the upper tank main body, and the adjusting valve is connected to and drives the sliding plate to rise or fall to adjust the opening of the gap on the side wall of the upper tank main body.

[0012] The adjusting valve comprises a screw rod, an operating member and a nut, the nut is fixedly installed on the sliding plate, the screw rod passes through the nut and is screwed with the nut, the lower end of the screw rod is rotatably installed on the bottom plate of the upper tank main body, the upper end of the screw rod passes through the nut and is connected to the operating member for manual operation, the adjusting operating member drives the screw rod to rotate, the screw rod drives the nut screwed with it to move along the length direction of the screw rod, and the nut drives the sliding plate to move synchronously.

[0013] The water level adjusting assembly further comprises a U-shaped plate and a sliding plate connecting piece, the U-shaped plate is a plate structure in U shape, the U-shaped plate is connected at the gap on the side wall of the upper tank main body, the U-shaped plate does not block the gap, two parallel and spaced long hole through holes are arranged on the U-shaped plate, and the sliding plate connecting piece is provided with two, the two sliding plate connecting pieces pass through the sliding plate, then pass through the two through holes on the U-shaped plate, and are limited by a limiting piece, the sliding plate connecting piece can move along the through holes on the U-shaped plate to drive the sliding plate to move along the length direction of the through holes on the U-shaped plate.

[0014] A plurality of workpiece supporting pieces for supporting the workpieces to be cooled are arranged on the bottom plate of the upper tank main body, the plurality of workpiece supporting pieces are arranged at intervals, and the height of the workpiece supporting piece is adjustable.

[0015] The water level adjusting assembly can adjust the water level in the upper water tank, is suitable for cooling of castings with different thicknesses, reduces the labor intensity of workers, two groups of water pipes are arranged, are suitable for cooling of solid and hollow tile blanks respectively, and meanwhile ensure that the cooling pressure of each group meets the cooling requirement, efficient cooling is realized, and the switching of the two groups of water pipes is simple and convenient; the water pipe fixing member has universality, is suitable for fixing of annular water inlet pipes with different annular diameters, and the cooling water tank is simple to use, safe and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of annular hollow tile blank support on the cooling water tank of one embodiment of the utility model.

[0017] Figure 2 is a structural schematic view of one embodiment of the utility model.

[0018] Figure 3 is another view structural schematic view of one embodiment of the utility model without showing the grid plate.

[0019] Figure 4 is a lower water tank structural schematic view of one embodiment of the utility model.

[0020] Figure 5 is an annular water inlet part and water pipe fixing member structural schematic view of one embodiment of the utility model.

[0021] Figure 6 is an A place enlarged structural schematic view of Figure 3 .

[0022] Figure 7 is a structural schematic view of Figure 6 after removing the sliding plate. DETAILED DESCRIPTION

[0023] The specific embodiments of the utility model are described in detail below in combination with the drawings. It should be understood that the specific embodiments described herein are only used for illustrating and explaining the utility model, and are not used for limiting the utility model.

[0024] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0025] A static casting cooling water tank, such as Figures 1-7 As shown, it includes a lower water tank 1, an upper water tank 2, a water level regulating component 3, a water inlet section, and a drain pipe 5.

[0026] The upper water tank 2 is located above the lower water tank 1. The workpiece 6 to be cast and cooled is placed in the upper water tank 2 for cooling. The water level regulating component 3 is used to regulate the water level in the upper water tank 2 to meet the cooling requirements of different workpieces 6 while reducing water consumption. Cooling water enters the upper water tank 2 through the water inlet, and the water is discharged through the drain pipe 5 after cooling. The workpiece 6 includes a tile blank and metal. The molten high-temperature metal to be cooled is placed inside the tile blank, and the metal solidifies after cooling. In this embodiment, a solid tile blank refers to a rectangular or cylindrical container, and the corresponding cooled and formed metal is a continuous structure such as a rectangular or cylindrical shape. A hollow tile blank refers to an annular container, and the corresponding cooled and formed metal is annular.

[0027] Lower water tank 1 as Figures 1-3 As shown, the system includes a lower sink body 11, foot cups 12, an upper sink support 13, and a lifting device 14. The lower sink body 11 is a relatively thin, round-bottomed container without a top cover, and all circumferential sidewalls of the lower sink body 11 are of equal height. In other words, the lower sink body 11 has a cylindrical outline, and its diameter is greater than its height. Multiple foot cups 12 are provided to support the lower sink body 11, raising its bottom surface off the ground or workbench. The foot cups 12 themselves are supported on the ground or workbench. The upper sink support 13 is installed on the lower sink 1 and supports the upper sink 2. The upper sink support 13 passes through or rests on the bottom plate of the lower sink body 11, supporting the upper sink 2 at its upper end. The lifting device 14 is installed on the lower sink body 11 and is used to lift the lower sink 1.

[0028] In this embodiment, the lower end of the upper tank support 13 is supported on the foot cup 12, and the upper end extends upward after passing through the bottom plate of the lower tank body 11 to support the upper tank 2.

[0029] The upper tank 2 comprises an upper tank body 21, a workpiece support 22, a water pipe fixing member 23, and a cover plate 24. The shape of the upper tank body 21 is similar to that of the lower tank body 11, i.e., the upper tank body 21 is also a circular bottom container with a relatively thin thickness without an upper cover. The difference is that the circumferential side wall of the upper tank body 21 is not uniform in height, but is provided with at least one gap arranged at intervals. The diameter of the upper tank body 21 is smaller than that of the lower tank body 11. When the upper tank 2 is supported on the upper tank support 13, the circumference of the upper tank body 21 does not exceed that of the lower tank body 11, so that when the water in the upper tank body 21 overflows, it can flow into the lower tank body 11. Preferably, the lower tank body 11 and the upper tank body 21 are arranged on the same central axis.

[0030] The workpiece support 22 is arranged and supported on the bottom plate of the upper tank body 21, and is used to support the workpiece 6 to be cooled. The workpiece support 22 is provided in plurality, and the plurality of workpiece supports 22 are arranged at intervals. The height of the workpiece support 22 is adjustable to adjust the height of the workpiece 6 supported thereby.

[0031] In this embodiment, the workpiece support 22 is a screw jack.

[0032] The water pipe fixing member 23 is used to fix the water pipe arranged on the upper tank body 21. The water pipe fixing member 23 comprises a pipe clamp 231 and a sliding rail 232. The sliding rail 232 is fixedly installed on the bottom plate of the upper tank body 21, and the pipe clamp 231 is slidingly arranged on the sliding rail 232 while being capable of clamping the water pipe. The pipe clamp 231 comprises two clamp blocks which are detachably connected by bolts. One of the two clamp blocks is slidingly arranged on the sliding rail 232, and the water pipe is clamped in the middle by the two clamp blocks.

[0033] The water pipe fixing member 23 is provided in plurality, and the sliding rails 232 of the plurality of water pipe fixing members 23 are arranged radially around the same center, i.e., the plurality of straight lines on which the sliding rails 232 are respectively located can intersect at the same point. In this way, the water pipe fixing member 23 can be suitable for fixing the annular water inlet pipe 432 (see below) of different annular diameters, i.e., the water pipe fixing member 23 has universality. Different annular diameters of the annular water inlet pipe 432 can be used for workpieces 6 of different sizes. For example, 3-4 groups of annular water inlet pipes 432 can be made, each group covering workpieces 6 of a size of about plus or minus 100 in diameter. For example, the annular water inlet pipe 432 has a pitch circle of 500 mm, which can cover workpieces 6 of a diameter of 400-600 mm.

[0034] A through hole is formed in the center of the bottom plate of the upper tank body 21, which is a main water inlet, and a cover plate 24 is detachably arranged on the main water inlet. The cover plate 24 is provided with at least one through hole, and the diameter of the through hole is smaller than that of the main water inlet, so as to increase the pressure of the cooling water sprayed from the main water inlet. At least one cover plate 24 can be arranged, and the diameters of the through holes in the cover plates 24 are different. The pressure of the water sprayed from the main water inlet can be adjusted by replacing the cover plate 24, so as to adapt to the cooling of different workpieces 6.

[0035] The lower tank body 11 and the upper tank body 21 are both provided with grating plates 25 for workers to step on and walk through. The grating plates 25 are lifted away from the bottom plate of the upper tank body 21 or the lower tank body 11 by support frames, so that the water in the upper tank body 21 flows under the corresponding grating plate 25, and the water in the lower tank body 11 flows under the corresponding grating plate 25. The grating plates 25 can be arranged flexibly and do not interfere with the arrangement of the components of the cooling tank itself.

[0036] The water level adjusting assembly 3 is used to adjust the water level in the upper tank 2. Specifically, the water level adjusting assembly 3 includes a sliding plate 31, a U-shaped plate 32, a sliding plate connecting piece 33, and an adjusting valve 34. The U-shaped plate 32 is a U-shaped plate structure. The number of U-shaped plates 32 is the same as the number of notches on the side wall of the upper tank body 21. Each U-shaped plate 32 is connected to the notch on the side wall of each upper tank body 21, but the U-shaped plate 32 does not block the notch, but exposes the notch at the U-shaped opening.

[0037] The number of sliding plates 31 is the same as the number of U-shaped plates 32, and each sliding plate 31 corresponds to each U-shaped plate 32. The sliding plate 31 is installed on the U-shaped plate 32 in a lifting manner. The U-shaped plate 32 is provided with two parallel and spaced long strip-shaped through holes. The sliding plate connecting piece 33 is provided with two, and the two sliding plate connecting pieces 33 pass through the sliding plate 31 and then pass through the two through holes on the U-shaped plate 32, and then are limited by a limiting piece, so that the sliding plate connecting piece 33 cannot be separated from the U-shaped plate 32. The sliding plate connecting piece 33 can move along the through hole on the U-shaped plate 32, drive the sliding plate 31 to move along the length direction of the through hole on the U-shaped plate 32, and realize the lifting of the sliding plate 31.

[0038] The sliding plate 31 is located at the notch on the side wall of the upper tank body 21, and realizes the opening or closing of the notch. The rising of the sliding plate 31 realizes the gradual closing of the notch on the side wall of the upper tank body 21, so that the water level that can be accommodated by the upper tank 2 gradually rises. The descending of the sliding plate 31 realizes the gradual opening of the notch on the side wall of the upper tank body 21, so that the water level that can be accommodated by the upper tank 2 gradually decreases.

[0039] The adjusting valve 34 is used to adjust the lifting of the slide plate 31, and the adjusting valve 34 comprises a screw rod 341, an operating member 342 and a nut 343. The nut 343 is fixedly installed on the slide plate 31, and the screw rod 341 passes through the nut 343 and is screwed with the nut 343. The lower end of the screw rod 341 is rotatably installed on the bottom plate of the upper tank body 21, and the upper end of the screw rod 341 passes through the nut 343 and is connected with the operating member 342 for manual operation. The rotation of the adjusting operating member 342 drives the screw rod 341 to rotate, and the screw rod 341 drives the nut 343 screwed with the screw rod 341 to move along the length direction of the screw rod 341, thereby driving the slide plate 31 to move synchronously and realizing the lifting of the slide plate 31. When the driving of the screw rod 341 is stopped, the nut 343 can be self-locked, thereby stopping at the current position.

[0040] The U-shaped plate 32 is provided with a scale for marking the position of the slide plate 31, so that the water level in the current upper tank 2 can be known through the scale.

[0041] The water inlet part comprises a total water inlet pipe 41, a main water inlet pipe 42 and a ring-shaped water inlet part.

[0042] One end of the main water inlet pipe 42 is connected with the total water inlet pipe 41, and the other end of the main water inlet pipe 42 passes through the bottom plate of the lower tank body 11 and the bottom plate of the upper tank body 21 from below to above and then enters the upper tank body 21. Preferably, the main water inlet pipe 42 passes through the center of the bottom plate of the lower tank body 11 and the center of the bottom plate of the upper tank body 21. Preferably, the upper end of the main water inlet pipe 42 passes through the through hole in the center of the bottom plate of the upper tank body 21 and is flush with the bottom plate of the upper tank body 21, so as to facilitate the cover of the cover plate 24 on the through hole in the center of the bottom plate of the upper tank body 21.

[0043] The ring-shaped water inlet part comprises a secondary water inlet pipe 431, a ring-shaped water inlet pipe 432, a rubber pipe 434 and a plurality of universal nozzles 433. One end of the secondary water inlet pipe 431 is connected with the total water inlet pipe 41, and the other end of the secondary water inlet pipe 431 is connected with the ring-shaped water inlet pipe 432 through the rubber pipe 434. The rubber pipe 434 is connected with the ring-shaped water inlet pipe 432 through a tower joint. The ring-shaped water inlet pipe 432 is a ring-shaped water pipe, and preferably, the ring-shaped water inlet pipe 432 surrounds the through hole on the bottom plate of the upper tank body 21. The ring-shaped water inlet pipe 432 is fixed on the bottom plate of the upper tank body 21 through a water pipe fixing member 23, and the water pipe fixing member 23 is provided with a plurality of water pipe fixing members 23 which are arranged at intervals along the circumferential direction of the ring-shaped water inlet pipe 432. The plurality of universal nozzles 433 are installed on the ring-shaped water inlet pipe 432 through pipe seats at intervals, and the water spraying direction of the universal nozzles 433 is adjustable. The number of the universal nozzles 433 is adjusted according to the division circle of the ring-shaped water inlet pipe 432. The distance between adjacent universal nozzles 433 is 100-150 mm. The universal nozzles 433 adopt the nozzle structure in the prior art.

[0044] In this embodiment, the water inflow of the total water inlet pipe 41 is 60L / min, the distance between the adjacent universal nozzles 433 is 100mm, the inner diameter of the annular water inlet pipe 432 is 50mm, and the inner diameter of the universal nozzle 433 is 2mm.

[0045] In this embodiment, the valve is installed on the total water inlet pipe 41, the main water inlet pipe 42 and the secondary water inlet pipe 431.

[0046] The drain pipe 5 is communicated with the sink main body 11. The drain pipe 5 has a diameter DN200, and the cross-sectional area is multiple times of that of the total water inlet pipe 41, so that the water can be drained quickly. In this embodiment, the cross-sectional area of the drain pipe 5 is six times of that of the total water inlet pipe 41.

[0047] Preferably, the sink is integrally welded by stainless steel, and the sink main body 11 and the sink upper body 21 are made of stainless steel.

[0048] Based on the above structure, the working process and principle of the utility model are as follows: the sink is equivalent to two layers, the upper layer is a cooling and overflow layer, and the lower layer is a drainage layer. The upper overflow layer is provided with a manually adjusted gate valve (i.e. the water level adjusting assembly 3), and the U-shaped plate 32 is marked with a scale, which controls the final draft of different tiles. The water inlet pipe is equivalent to two groups, which are suitable for solid or hollow tiles. When used, the tile is placed on the sink, supported on the workpiece support 22, and the height of the workpiece support 22 is adjusted according to the size of the tile, so that the tile is in a suitable position. The tile is used to hold molten metal (such as babbitt alloy). In addition, according to the height of the tile away from the bottom plate of the sink upper body 21 and the size of the tile itself, the operating member 342 is adjusted, so that the sliding plate 31 is lifted and is at a suitable scale, so as to ensure the appropriate water level.

[0049] For solid tiles (such as the metal in the tile is a cylinder after solidification), the main water inlet pipe 42 is opened, the annular water inlet part is closed, the external cooling water sequentially passes through the total water inlet pipe 41 and the main water inlet pipe 42, and then is sprayed from bottom to top through the through hole in the cover plate 24 to the bottom of the solid tile and is sprayed around, so that the workpiece 6 is cooled. When the cooling water passes through the through hole in the cover plate 24 from the main water inlet pipe 42, the water flow area is reduced, the water spraying pressure is increased, the water spraying pressure and flowability are ensured, the cooling speed is improved, and the tile is rapidly cooled. When the water level rises to the top position of the sliding plate 31, the water is automatically overflowed into the sink main body 11, so that the water level in the sink upper body 21 is always maintained at the set position.

[0050] When cooling the hollow tile (such as the metal in the tile is a circular ring after solidification), the appropriate annular water inlet pipe 432 is selected according to the annular diameter of the tile, the main water inlet pipe 42 is closed, and the annular water inlet part is opened. The universal nozzles 433 on the annular water inlet pipe 432 are uniformly sprayed to the bottom of the tile, so that the tile is rapidly cooled.

[0051] Finally, it is necessary to explain here is: the above examples are only used to make further detailed description of the technical scheme of the utility model, and cannot be understood as limiting the protection scope of the utility model. Some non-essential improvements and adjustments made by the skilled in the art according to the above content of the utility model all belong to the protection scope of the utility model.

Claims

1. A static cast cooling water channel, characterized by, The cooling water tank comprises a lower tank (1), an upper tank (2), a water inlet part and a drain pipe (5), the upper tank (2) comprises an upper tank body (21), the upper tank body (21) is a container without an upper cover, the lower tank (1) comprises a lower tank body (11), the lower tank body (11) is a container without an upper cover, the upper tank body (21) is located above the lower tank body (11), the circumference of the upper tank body (21) does not exceed the circumference of the lower tank body (11), a workpiece (6) to be cast and cooled is placed in the upper tank body (21) for cooling, the water inlet part comprises a total water inlet pipe (41), a main water inlet pipe (42) and an annular water inlet part, one end of the main water inlet pipe (42) is connected to the total water inlet pipe (41), the other end of the main water inlet pipe (42) passes through the bottom plate of the lower tank body (11) and the bottom plate of the upper tank body (21) from below to above of the lower tank body (11) and then enters the upper tank body (21), the annular water inlet part comprises a secondary water inlet pipe (431), an annular water inlet pipe (432) and a plurality of universal nozzles (433), one end of the secondary water inlet pipe (431) is connected to the total water inlet pipe (41), the other end of the secondary water inlet pipe (431) is connected to the annular water inlet pipe (432), the annular water inlet pipe (432) is an annular water pipe, the plurality of universal nozzles (433) are spaced apart and arranged on the annular water inlet pipe (432), and the annular water inlet pipe (432) is arranged in the upper tank body (21).

2. The cooling tank of claim 1, wherein: The end of the main water inlet pipe (42) extending into the upper tank body (21) is detachably connected to a cover plate (24), the cover plate (24) is provided with a through hole, and the diameter of the through hole of the cover plate (24) is smaller than the diameter of the main water inlet pipe (42).

3. The cooling tank of claim 1, wherein: The annular water inlet pipe (432) is fixed to the bottom plate of the upper tank body (21) through a water pipe fixing piece (23), the water pipe fixing piece (23) is provided with a plurality of water pipe fixing pieces (23) which are spaced apart along the circumference of the annular water inlet pipe (432), the water pipe fixing piece (23) comprises a pipe clamp (231) and a sliding rail (232), the sliding rail (232) is fixedly arranged on the bottom plate of the upper tank body (21), and the pipe clamp (231) is slidably arranged on the sliding rail (232) and can clamp the annular water inlet pipe (432), and the sliding rails (232) of the plurality of water pipe fixing pieces (23) are arranged radially around the same center.

4. The cooling tank of claim 3, wherein: The secondary water inlet pipe (431) is connected to the annular water inlet pipe (432) through a rubber pipe (434).

5. The cooling water tank according to any one of claims 1 to 4, characterized by: The circumferential side wall of the upper tank body (21) is provided with at least one gap which is spaced apart, and the cooling water tank further comprises a water level adjusting assembly (3) for adjusting the opening degree of the gap to adjust the water level in the upper tank body (21).

6. The cooling tank of claim 5, wherein: Each gap in the upper tank body (21) is adjusted in opening degree by one water level adjusting assembly (3), and the water level adjusting assembly (3) comprises a sliding plate (31) and an adjusting valve (34), the sliding plate (31) is located at the gap in the circumferential side wall of the upper tank body (21), and the adjusting valve (34) is connected to and drives the sliding plate (31) to ascend or descend to adjust the opening degree of the gap in the circumferential side wall of the upper tank body (21).

7. The cooling tank of claim 6, wherein: The adjusting valve (34) comprises a screw rod (341), an operating member (342) and a nut (343), the nut (343) is fixedly installed on the sliding plate (31), the screw rod (341) passes through the nut (343) and is screwed with the nut (343), the lower end of the screw rod (341) is rotatably installed on the bottom plate of the upper tank body (21), the upper end of the screw rod (341) is connected with the operating member (342) for manual operation after passing through the nut (343), the adjusting operating member (342) drives the screw rod (341) to rotate, the screw rod (341) drives the nut (343) screwed with the screw rod (341) to move along the length direction of the screw rod (341), and the nut (343) drives the sliding plate (31) to move synchronously.

8. The cooling tank of claim 6, wherein: The water level adjusting assembly (3) further comprises a U-shaped plate (32) and a sliding plate connecting member (33), the U-shaped plate (32) is a plate-shaped structure in a U shape, the U-shaped plate (32) is connected at the notch of the side wall of the upper tank body (21), the U-shaped plate (32) does not block the notch, two parallel and spaced long strip-shaped through holes are arranged on the U-shaped plate (32), the sliding plate connecting member (33) is provided with two, the two sliding plate connecting members (33) pass through the two through holes on the U-shaped plate (32) after passing through the sliding plate (31) and are limited by the limiting members, the sliding plate connecting member (33) can move along the through holes on the U-shaped plate (32) and drive the sliding plate (31) to move along the length direction of the through holes on the U-shaped plate (32).

9. The cooling tank of claim 1, wherein: A plurality of workpiece supporting members (22) for supporting the workpieces (6) to be cooled are arranged on the bottom plate of the upper tank body (21), the plurality of workpiece supporting members (22) are arranged at intervals, and the height of the workpiece supporting member (22) is adjustable.

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