CN219103674U - Vacuum cooling tank and liner thereof - Google Patents

Abstract

The utility model relates to a vacuum cooling tank and an inner container thereof, wherein the inner container of the vacuum cooling tank comprises: an outer sleeve, an inner sleeve, a first connecting piece and a second connecting piece, wherein the inner sleeve is arranged in the outer sleeve and is connected with a first end of the outer sleeve; the transition sleeve body is arranged between the outer sleeve and the first connecting piece and is connected with the outer sleeve and the first connecting piece; wherein the inner sleeve and the outer sleeve are copper castings. This application vacuum cooling jar's inner bag is through replacing partial material copper, utilizes copper high thermal conductivity, can increase heat conduction ability, can improve production efficiency.

Description

Vacuum cooling tank and liner thereof

Technical Field

The utility model relates to the field of rare earth smelting equipment, in particular to a vacuum cooling tank and an inner container thereof.

Background

As is well known, the current workflow of vacuum induction melting rapid hardening furnaces is: alloy raw materials are placed into a smelting crucible of a vacuum smelting rapid hardening device, the raw materials are heated and melted into molten alloy under vacuum and protective atmosphere, then the molten alloy is cast onto the outer surface of a copper cooling roller with water cooling through a tundish at a controllable speed to be quickly solidified into alloy flakes, the alloy flakes forming solid state are dropped into a vacuum cooling tank for secondary cooling, a cooling system beside the vacuum cooling tank can accelerate the secondary cooling speed, after the alloy flakes are cooled, a furnace door of the vacuum rapid hardening device is opened, and the alloy flakes are manually removed.

While the existing vacuum cooling tank type material receiving vacuum induction melting rapid hardening furnace mode has greatly improved product performance compared with the traditional vacuum induction melting ingot furnace, the working mode has a plurality of defects: 1. at present, the vacuum cooling tank is in a vacuum environment in the rare earth material production cooling process, and is mainly formed by conducting heat between materials and tank walls, and the traditional cooling tank heat conduction liner is made of steel, so that the cooling rate of the rare earth material is lower due to good wear resistance and strength performance but poor heat conduction capacity (about 5-6 hours per tank), and the production efficiency is lower; 2. the tank body of the vacuum tank is made of steel, and scrap iron can be brought into raw materials through friction when alloy materials enter and exit the tank body, so that certain pollution can be caused, and the quality of products is affected.

Disclosure of Invention

Aiming at the technical problems in the prior art, the utility model provides an inner container of a vacuum cooling tank, which comprises: an outer sleeve, an inner sleeve, a first connecting piece and a second connecting piece, wherein the inner sleeve is arranged in the outer sleeve and is connected with a first end of the outer sleeve; the transition sleeve body is arranged between the outer sleeve and the first connecting piece and is connected with the outer sleeve and the first connecting piece; wherein the inner sleeve and the outer sleeve are copper castings.

The liner as described above, further comprising: and the second connecting piece is positioned below the inner sleeve and/or the outer sleeve and is connected with the outer sleeve.

The inner sleeve comprises an inner sleeve body, a sleeve top and a plurality of first rib plates, wherein the sleeve top is arranged above the inner sleeve body, and the first rib plates are arranged on the circumference outside the inner sleeve body and extend outwards of the inner sleeve body.

As described above, the sleeve top is conical and configured to guide the rare earth material to slide down.

The liner as described above, the inner liner further comprising: and the wear-resistant layer is arranged at the tip part of the sleeve top.

A liner as described above, the outer sleeve comprising: the novel anti-theft coat comprises a coat body, a coat bottom and a plurality of second rib plates, wherein the coat bottom is arranged below the coat body, and the second rib plates are arranged on the circumference of the inside of the coat body and extend into the coat body.

The thickness of the inner sleeve is 12-18mm, and the thickness of the outer sleeve is 12-18mm.

The liner comprises the first connecting part and the second connecting part, wherein the first connecting part is arranged on the circumference of the first connecting part, and the second connecting part surrounds the first connecting part.

According to another aspect of the present application, there is provided a vacuum cooling tank comprising: the inner container comprises a shell, a cover body and the inner container, wherein the inner container is arranged in the shell, the shell is connected with the first connecting piece, and the cover body is arranged on the inner container and can be opened relative to the inner container.

This application vacuum cooling jar's inner bag is through replacing partial material copper, utilizes copper high thermal conductivity, can increase heat conduction ability, can improve production efficiency.

Drawings

Preferred embodiments of the present utility model will be described in further detail below with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic diagram of a copper-steel combined vacuum cooling tank according to one embodiment of the present application;

FIG. 2 is an exploded view of a copper-steel combined vacuum cooling tank according to one embodiment of the present application;

FIGS. 3A and 3B are cross-sectional views of a copper-steel combined vacuum cooling tank according to one embodiment of the present application;

FIG. 4 is a schematic view of a liner according to an embodiment of the present application;

FIG. 5 is an exploded view of a liner structure according to one embodiment of the present application;

FIG. 6 is a top view of a liner structure according to one embodiment of the present application;

FIG. 7 is a cross-sectional view of a bladder configuration according to one embodiment of the present application; and

fig. 8 is a flow chart of the fabrication of a copper-steel combined vacuum cooling tank according to one embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific embodiments in which the application may be practiced. In the drawings, like reference numerals describe substantially similar components throughout the different views. Various specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to practice the teachings of the present application. It is to be understood that other embodiments may be utilized or structural, logical, or electrical changes may be made to the embodiments of the present application.

At present, how to increase the heat conduction efficiency of the vacuum cooling tank is primarily solved, the vacuum cooling tank is in a vacuum environment in the production process, and main heat is conducted by the inner wall and the outer wall of the liner, so that the heat conduction efficiency of the vacuum cooling tank can be increased by changing the material of the liner of the cooling tank, and the production efficiency of rare earth materials is improved. According to the application, various alloys, novel materials, ceramics and the like are tested, and finally, the heat conductivity coefficients of steel and the alloys thereof are lower than 100 (W/m.K), so that the heat conductivity efficiency is lower; the silicon aluminum carbon materials such as ceramic diamond and the like have the defects of no shock resistance, no water resistance, easy damage and the like, and cannot meet the strength requirement of the vacuum cooling tank; the other materials (such as zinc) are active metals, are easy to react, can pollute the production of rare earth, influence the quality of products, are too soft in gold and silver and the like, have insufficient strength and are not easy to be used as a tank body; the metallic property of copper is stable, the heat conductivity coefficient is extremely high and is about 9 times of that of iron (W/m.K), and the mechanical property can meet the requirement of being used as a tank body. Therefore, the application provides a copper-steel combined vacuum cooling tank, which can greatly improve the heat conduction efficiency of the vacuum cooling tank, improve the production efficiency of rare earth materials, and ensure that copper is also a component of rare earth alloy, does not pollute raw materials and can greatly improve the quality of products.

The technical scheme of the application is further described through specific embodiments. It should be understood by those skilled in the art that the following descriptions are only for convenience in understanding the technical solutions of the present application and should not be used to limit the scope of protection of the present application.

FIG. 1 is a schematic diagram of a copper-steel combined vacuum cooling tank according to one embodiment of the present application. Fig. 2 is an exploded view of a copper-steel combined vacuum cooling tank according to one embodiment of the present application. Fig. 3A and 3B are cross-sectional views of a copper-steel combined vacuum cooling tank according to one embodiment of the present application. Fig. 3A and 3B show cross-sectional views of the vacuum cooling tank in two different directions, respectively.

As shown, a copper-steel combined vacuum cooling tank (which may be referred to simply as a "vacuum cooling tank" or "cooling tank") 100 includes an inner liner 110, a housing 120, and a lid 130. The inner container is disposed in the housing 120 and can be fixedly connected with the housing 120; the cover 130 is disposed on the inner container 110 and can be openable with respect to the inner container 110.

In some embodiments, the interior of the liner 110 includes a cavity 111 and an opening 112. Wherein the cavity 111 may be configured to receive and cool rare earth material, and the opening 112 may receive rare earth material into the cavity 111. In some embodiments, the inner container 110 is disposed in the casing 120, the casing 120 can protect the inner container 110 from damage, and the casing 120 can also accommodate a cooling medium (such as cooling water) to exchange heat with the outer wall of the inner container, so as to accelerate cooling of the rare earth material in the inner container.

In some embodiments, the cover 130 may be disposed on the opening 112 of the liner 110, and may seal the cavity in the liner 110, so that the cavity 111 may form a sealed space, and may shield the cavity in the liner, prevent other objects from entering the cavity 111, and cause pollution to the rare earth material in the cavity, and may further draw vacuum from the cavity.

In some embodiments, sealing devices (not shown) may be included between the liner and the housing and between the liner and the cover, which may seal the liner from the housing and between the liner and the cover, preventing leakage of cooling medium in the housing and breaking the vacuum environment in the cavity. In some embodiments, the sealing means may be a sealing strip, a sealant, or the like.

In some embodiments, the housing 120 may also include a water inlet pipe 121 and a water outlet pipe 122, which may be used to accommodate cooling water entering and exiting the housing 120 and may exchange heat for the liner. In some embodiments, the water inlet pipe 121 may directly pass through the middle of the inner container, the inner wall of the inner container may cool the rare earth material in the inner container, and the water outlet pipe 122 may communicate with the outer wall of the inner container, and may recover the cooling water of the outer wall of the inner container. In some embodiments, the housing 120 may further include one or more water baffles 123, which may be used to block the cooling water, so that the cooling water may be in close contact with the liner, increasing the contact area between the cooling water and the liner, increasing the cooling efficiency of the liner, and increasing the production efficiency.

As described above, the inner container 110 is configured to contain rare earth material and cool the rare earth material, and the cooling water can be introduced into the vicinity of the inner container 110 through the water inlet and outlet pipe in the casing, so as to exchange heat with the inner container and cool the rare earth material. Therefore, the heat conduction efficiency of the liner directly influences the cooling efficiency of the rare earth material and the production efficiency of the rare earth material. The application further changes the liner structure to improve the cooling efficiency of rare earth materials. The liner structure of the present application will be described in detail.

Fig. 4 is a schematic view of a liner according to an embodiment of the present application. Fig. 5 is an exploded view of a liner structure according to one embodiment of the present application. Fig. 6 is a top view of a liner structure according to one embodiment of the present application. Fig. 7 is a cross-sectional view of a bladder structure according to one embodiment of the present application.

As shown, the liner 110 includes an inner liner 410 and an outer liner 420. Wherein the inner case 410 is disposed inside the outer case 420, and at a first end of the cooling tank, the inner case 410 and the outer case 420 are connected to each other, a cavity 111 of the inner case 110 is formed between the inner case 410 and the outer case 420, which can be used to accommodate rare earth materials, and heat is conducted through the inner case 410 and the outer case 420, so as to exchange heat and cool the rare earth materials accommodated therebetween.

In some embodiments, the material of inner sleeve 410 and outer sleeve 420 may be copper, which may be advantageous to increase cooling of the rare earth material and increase production efficiency. In some embodiments, the inner sleeve 410 and the outer sleeve 420 may be joined by welding to facilitate reducing manufacturing difficulties. In some embodiments, the inner sleeve 410 and the outer sleeve 420 may also be integrally formed. For example: the integral casting molding is beneficial to the stability of the integral structure of the liner, and can ensure good air tightness.

In some embodiments, the inner sleeve 410 includes a sleeve body 411 and a sleeve top 412. Wherein, the sleeve body 411 is cylindrical, the sleeve top 412 is conical, and the sleeve top 412 is arranged at the top of the sleeve body 411 and connected with the sleeve body 411, so that rare earth materials falling into the liner can be guided to slide down. In some embodiments, the inner sleeve 410 may further include a plurality of rib plates 413 disposed at equal intervals on the circumference of the outer portion of the sleeve body 411, which may divide the sliding rare earth material, may increase the structural strength of the inner sleeve, may increase the contact area with the rare earth material, and may increase the cooling efficiency of the rare earth material. In some embodiments, the gusset 413 may also be otherwise disposed on the outer circumference of the sleeve 411. For example: unequal spacing arrangements, oblique staggered arrangements, and the like. In some embodiments, the thickness of the inner sleeve 410 may be 12-18mm. For example, 12mm, 16mm, etc. can be used.

In some embodiments, the sleeve body 411, the sleeve top 412 and the rib plate 413 can be cast (such as sand casting), so that the difficulty of copper connection can be reduced, the molding of the molding box is convenient, the cost is low, the parts can be tightly combined, no gap exists, the stability and the tightness of the overall structure of the inner sleeve can be ensured, and the heat conduction efficiency can be improved. In some embodiments, the sleeve 411, the sleeve top 412, and the rib 413 may be cast in other ways. For example: metal mold casting, pressure casting, low pressure casting, and the like. In some embodiments, the sleeve 411, the sleeve top 412, and the gusset 413 may be made by other means. For example: and (5) welding and forming the copper plate ring, and hydraulic forging and forming.

In some embodiments, the inner sleeve 410 may further include a wear layer 414, which may be disposed at the tip of the sleeve top 412, which may improve the wear resistance of the sleeve top and increase the service life of the sleeve top. In some embodiments, the wear layer may be formed by bead welding. In some embodiments, the material of the wear-resistant layer may be stainless steel, ceramic, etc., which is beneficial to increase the wear resistance of the bushing top and can solve the problem of copper wear-resistance.

In some embodiments, the outer sleeve 420 may include a sleeve body 421 and a sleeve base 422. The sleeve body 421 is cylindrical, the sleeve bottom 422 is spherical, and the sleeve bottom 422 is disposed at the bottom of the sleeve body 421 and connected to the sleeve body 421, and can be used for bearing sliding rare earth materials. In some embodiments, the sleeve bottom 422 may include an opening that may receive the water inlet tube 121 into the inner sleeve through which the rare earth material may be cooled, wherein the sleeve body 411 of the inner sleeve 410 may be coupled to the edge of the opening of the sleeve bottom 422. In some embodiments, the jacket 420 may further include a plurality of rib plates 423 disposed at equal intervals on the circumference of the inside of the jacket body 421, which may divide the sliding rare earth material, increase the contact area with the rare earth material, improve the cooling efficiency of the rare earth material, and also increase the structural strength of the jacket. In some embodiments, the web 423 may also be otherwise disposed on the inner circumference of the sleeve 421. For example: unequal spacing arrangements, oblique staggered arrangements, and the like. In some embodiments, the thickness of the jacket 420 may be 12-18mm. For example, 12mm, 16mm, etc. can be used. In some embodiments, the connection of the sleeve body 421, the sleeve bottom 422 and the rib plates 423 is similar to that of the inner sleeve 410, so that the description thereof will not be repeated here.

In some embodiments, the liner 110 may further include an upper connector 430 disposed over the inner and/or outer jacket and coupled to the outer jacket 420, which may be used to connect the liner to the outer shell 120 and/or the cover 130, or may be used in conjunction with a cooling tank and other devices.

In some embodiments, the upper connector 430 may include an opening 431 that may be used to accommodate the ingress of rare earth material between the inner sleeve 410 and the outer sleeve 420, and may also be used to contact the cover 130. In some embodiments, the upper connector may further include a first connection portion 432 located on the circumference of the upper connector that may be used to connect the liner 110 with the outer shell 120. In some embodiments, the first connection portion 432 may include a plurality of connection holes 4321, and the inner container and the outer case may be connected using a connection member (e.g., a bolt). In some embodiments, the upper connector 430 may also include a second connector 433 that is located outside the circumference of the upper connector and extends beyond the upper connector, which may be used to connect the cooling tank to other devices. In some embodiments, the second connector 433 includes a plurality of equally spaced outwardly extending plates 4331, wherein the plates 4331 include grooves therein for receiving connectors for connection to other devices.

The upper connector 430 may be connected to the housing, the cover, and/or other devices, and therefore may be subjected to a relatively large force, and in some embodiments, the upper connector 430 may be made of steel, which is beneficial to withstand a relatively large connecting force, and may increase the strength of the inner container, compensate for the insufficient strength of copper, and may increase the service life of the inner container.

Because the upper connecting piece 430 needs to be connected with the outer sleeve 420, but the two materials are different, the connection difficulty is high, poor connection is easy to generate, and the yield of the product is low. In some embodiments, the liner 110 may further include a transition sleeve 440, which may be disposed between the upper connector 430 and the outer sleeve 420, and may be coupled to the upper connector 430 and the outer sleeve 420, respectively. In some embodiments, the material of the transition sleeve body 440 may be steel, so that the transition sleeve body may be welded on the outer sleeve in advance, and then the upper connector 430 and the outer sleeve 420 may be connected to each other by welding the transition sleeve body 440 with the upper connector, and the welding difficulty between the upper connector 430 and the outer sleeve 420 may be reduced due to the smaller volume of the transition sleeve body 440 and the welding difficulty between the transition sleeve body 440 and the upper connector may be lower due to the steel material of the transition sleeve body 440. In some embodiments, the material of the transition sleeve body 440 may also be copper, which may be pre-attached to the upper connector and then attached to the outer jacket. In some embodiments, the transition sleeve body 440 is the same shape and size as the outer sleeve. In some embodiments, the upper connector 430 and the outer sleeve 420 may also be connected by other means. For example: copper steel sleeved rivet connection, high-strength metal adhesive, threaded connection and the like are used.

In some embodiments, the liner 110 may further include a lower connector 450 disposed below and connectable to the inner and/or outer liner, which may be used to carry and support the outer and/or inner liner, and which may also facilitate placement during liner processing, during fitting, or removal.

In some embodiments, the lower connector 450 may include a body 451 and a plurality of support posts 452. The main body 451 is circular, and the circular hole inside the main body 451 can be used for accommodating that a water inlet pipeline of the shell is led into the inner sleeve of the inner liner, and the plurality of support columns 452 are arranged on the main body 451 and supported on the sleeve bottom 422 of the outer sleeve, so that the outer sleeve and/or the inner sleeve can be supported, and the inner liner can be conveniently placed. In some embodiments, the support posts 452 may also be coupled (e.g., welded) to the outer sleeve, which may increase the overall structural strength of the liner. In some embodiments, the end of the support post 452 that contacts the outer sleeve includes a bevel to allow for a tight fit with the bottom 422 of the outer sleeve to facilitate placement of the liner. In some embodiments, the support 452 may also include through holes 4521 that extend through the entire support column and also through the body 451, which may be used to accommodate cooling water ingress, so that the casing of the support column portion may be prevented from having low heat transfer efficiency, which may be beneficial for improving heat transfer efficiency. In some embodiments, the material of the lower connector may be steel.

The vacuum cooling tank of the utility model has the advantages of through replacing the partial material of inner bag with copper, utilize copper high thermal conductivity, can increase heat conduction ability for every jar cooling time reaches 2-3 hours, can improve production efficiency, can also avoid causing the pollution to the product moreover. The other parts of the inner container are made of steel, so that the bearing of larger connecting acting force can be satisfied, and the cooling tank has both high heat conduction and higher mechanical strength.

The manufacturing process of the present application will be further described below:

fig. 8 is a flow chart of the fabrication of a copper-steel combined vacuum cooling tank according to one embodiment of the present application.

As shown, in step 810, an inner jacket and an outer jacket of a vacuum cooling tank liner are fabricated. The inner sleeve and the outer sleeve of the inner liner are manufactured by casting, so that the inner sleeve and the outer sleeve are integrally formed, and the manufacturing difficulty of the inner sleeve and the outer sleeve is reduced. In some embodiments, after the inner and outer sleeves are formed by casting, machining of the inner and outer sleeves is required to eliminate casting defects, so that the inner and outer sleeves are attractive and smooth. In some embodiments, machining the inner and outer sleeves may further comprise: grooves are formed on the inner sleeve and the outer sleeve so as to facilitate connection between the inner sleeve and the outer sleeve. In some embodiments, after the inner and outer sleeves are formed by casting or after the inner and outer sleeves are machined, a first hydrostatic test may be performed on the inner and outer sleeves to ensure that the inner and outer sleeves are leak-free and sweat-free.

In step 820, the inner and outer jackets are joined. And welding the inner sleeve and the outer sleeve which are finished and qualified, so that a cavity capable of containing rare earth materials can be formed. In some embodiments, the inner and/or outer sleeves may be welded by heating the two. In some embodiments, after the inner and outer sleeves are welded together, a second hydrostatic test may be performed on the joined inner and outer sleeves to ensure that the joint therebetween is leak-free and sweat-free.

In step 830, the upper and lower connectors are attached to the outer jacket to complete the assembly of the liner. In some embodiments, when the inner and outer sleeves are connected, the upper and lower connectors are connected to the outer sleeve to complete the installation of the liner. In some embodiments, the lower connector may be coupled to the outer sleeve using heat from the welding of the inner and outer sleeves (e.g., waste heat from the welding). In some embodiments, the upper connector is coupled to the outer jacket using a transition sleeve. In some embodiments, after the upper and lower connectors are connected to the outer sleeve to complete the installation of the liner, a third hydrostatic test may be performed on the liner to ensure that the liner is leak-free and sweats.

In step 840, the housing and cover are mounted to the liner, completing the assembly of the vacuum cooling tank. In some embodiments, the housing and cover are connected to the liner using an upper connector. In some embodiments, after the housing and cover are mounted to the liner, a fourth hydrostatic test may be performed on the vacuum cooling tank to ensure that the vacuum cooling tank is leak-free and sweats.

The above embodiments are provided for illustrating the present utility model and not for limiting the present utility model, and various changes and modifications may be made by one skilled in the relevant art without departing from the scope of the present utility model, therefore, all equivalent technical solutions shall fall within the scope of the present disclosure.

Claims (9)

1. A vacuum cooling tank liner, comprising:

the outer sleeve is provided with a plurality of grooves,

an inner sleeve disposed within the outer sleeve and connected to the first end of the outer sleeve,

the first connecting piece is arranged above the inner sleeve and/or the outer sleeve and is connected with the second end of the outer sleeve; and

the transition sleeve body is arranged between the outer sleeve and the first connecting piece and is connected with the outer sleeve and the first connecting piece;

wherein the inner sleeve and the outer sleeve are copper castings.

2. The liner according to claim 1, further comprising: and the second connecting piece is positioned below the inner sleeve and/or the outer sleeve and is connected with the outer sleeve.

3. The liner of claim 1, wherein the inner sleeve comprises an inner sleeve body, a sleeve top and a plurality of first rib plates, the sleeve top is arranged above the inner sleeve body, and the first rib plates are arranged on the circumference of the outer part of the inner sleeve body and extend outwards of the inner sleeve body.

4. The liner of claim 3, wherein the sleeve top is conical and configured to guide the rare earth material to slide off.

5. The liner according to claim 4, wherein the inner sleeve further comprises: and the wear-resistant layer is arranged at the tip part of the sleeve top.

6. The liner of claim 1, wherein the outer sleeve comprises: the novel anti-theft coat comprises a coat body, a coat bottom and a plurality of second rib plates, wherein the coat bottom is arranged below the coat body, and the second rib plates are arranged on the circumference of the inside of the coat body and extend into the coat body.

7. The liner of claim 1, wherein the inner sleeve has a thickness of 12-18mm and the outer sleeve has a thickness of 12-18mm.

8. The liner of claim 1, wherein the first connector comprises a first connector and a second connector, wherein the first connector is disposed on a circumference of the first connector, and the second connector surrounds the first connector.

9. A vacuum cooling tank, comprising: a casing, a cover and a liner according to any one of claims 1-8, wherein the liner according to any one of claims 1-8 is arranged in the casing, the casing is connected with the first connecting piece, and the cover is arranged on the liner according to any one of claims 1-8 and is openable relative to the liner according to any one of claims 1-8.

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