Flow guide pipe device and metal smelting furnace

Abstract

The invention discloses a flow guide pipe device and a metal smelting furnace, which are applied to crucible cooling, and comprise a pipeline assembly assembled in a water jacket; the inner ring wall of the first annular guide structure is fixedly arranged on the peripheral wall of the lower guide pipe in a sleeving mode, and when the lower guide pipe slides downwards under the action of gravity, a water inlet of the lower guide pipe is clamped to a water jacket water supply opening of the water jacket; the inner ring wall of the second annular guide structure fixedly sleeves the outer peripheral wall of the upper guide pipe; the inner ring of the floating ring is movably arranged on the peripheral wall of the guide pipe in a sleeving mode, and when buoyancy generated by the floating ring acts on the second annular guide structure, the water outlet of the upper guide pipe is clamped to the crucible water inlet of the crucible bottom pad. Compared with the prior art, the technical scheme has the advantages that the lower guide pipe and the upper guide pipe are in nested sliding connection, the self-adaptive adjustment of the length of the flow guide pipe device can be realized by virtue of the buoyancy of the floating ring, and the detachable connection of the upper guide pipe and the water inlet of the crucible is realized in a clamping manner, so that crucibles with different specifications can be accurately matched.

Description

Technical Field

[0001] The invention relates to the technical field of crucible cooling, and in particular to a flow guide pipe device and a metal smelting furnace. Background Art

[0002] Crucible is an important tool for vacuum consumable ingot melting, which is used to cool the molten metal into ingots.

[0003] In the vacuum consumable smelting production process, since the temperature of the molten metal can generally reach more than one thousand degrees Celsius, the cooling of the crucible bottom pad is particularly important. The consequences of poor cooling are often catastrophic. At the least, it causes the crucible bottom pad to deform, and at the worst, it causes the crucible to melt through. Both consequences are that cooling water enters the crucible, reacts with the molten metal, and even causes an explosion. In order to ensure all-round cooling of the crucible bottom pad, the water outlet pipe at the bottom of the water jacket provides cooling liquid to the crucible bottom pad through the guide pipe. The current guide pipe has a fixed length and specifications, and is fixed to the crucible bottom pad, which is extremely inconvenient when the ingot is loaded out of the furnace.

[0004] Therefore, how to provide a flow guide tube device whose length is retractable and can be detachably connected to the crucible bottom pad is a problem that urgently needs to be solved by those skilled in the art. Summary of the invention

[0005] In view of this, the present invention provides a flow guide tube device, the length of which is retractable and can be detachably connected to the bottom pad of the crucible.

[0006] The present invention also provides a metal smelting furnace comprising the above-mentioned flow guide pipe device.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A flow guide pipe device is used for crucible cooling, comprising: a pipe assembly assembled in a water jacket;

[0009] The pipeline assembly comprises: a lower conduit, an upper conduit, a first annular guide structure, a second annular guide structure and a floating ring; the water outlet of the lower conduit and the water inlet of the upper conduit are nested and slidably connected; the lower conduit and the upper conduit constitute a conduit;

[0010] The inner ring wall of the first annular guide structure is fixedly sleeved on the outer peripheral wall of the downpipe, and when the downpipe slides downward under the action of gravity, the water inlet of the downpipe is clamped to the water supply port of the water jacket based on the guidance of the first annular guide structure;

[0011] The inner ring wall of the second annular guide structure is fixedly sleeved on the outer peripheral wall of the upper conduit;

[0012] The floating ring is annular, the inner ring of the floating ring is movably sleeved on the outer peripheral wall of the catheter, and the floating ring is located between the first annular guide structure and the second annular guide structure;

[0013] When the buoyancy generated by the float ring acts on the second annular guide structure, the upper conduit is guided by the second annular guide structure, and the water outlet of the upper conduit is clamped to the crucible water inlet of the crucible bottom pad.

[0014] Preferably, the outer peripheral wall of the water inlet of the upper conduit is slidably nested in the inner peripheral wall of the water outlet of the lower conduit.

[0015] Preferably, the outer peripheral wall of the water inlet of the upper conduit is sleeved with a first limiting ring, the inner peripheral wall of the water outlet of the lower conduit is sleeved with a second limiting ring, and the outer diameter of the first limiting ring is greater than the inner diameter of the second limiting ring.

[0016] Preferably, the outer peripheral wall of the water inlet of the upper conduit is further provided with a first water sealing ring, and the first water sealing ring is located above the first limiting ring.

[0017] Preferably, the first annular guide structure comprises: a first flange, a first annular positioning plate and a second flange;

[0018] The first flange, the first annular positioning plate and the second flange are coaxially assembled in sequence to form the first annular guide structure;

[0019] Wherein, the inner ring of the first flange is fixedly sleeved on the outer peripheral wall of the water inlet of the downpipe.

[0020] Preferably, the first annular guide structure further comprises: a guide pipe having a large diameter end and a small diameter end; the small diameter end is connected to the water inlet of the downcomer, and the large diameter end can be snap-connected to the water supply port of the water jacket.

[0021] Preferably, the radius of the large-diameter end is greater than the radius of the water outlet of the water jacket.

[0022] Preferably, the second annular guide structure comprises: a third flange, a second annular positioning plate and a fourth flange;

[0023] The third flange, the second annular positioning plate and the fourth flange are coaxially assembled in sequence to form a second annular guide structure;

[0024] Wherein, the inner ring of the third flange is fixedly sleeved on the outer peripheral wall of the water inlet of the downpipe.

[0025] Preferably, the second annular guide structure further comprises: a positioning tube, one end of which is connected to the water outlet of the upper conduit, and the other end of which is connected to the water inlet of the crucible.

[0026] A metal smelting furnace comprises a crucible and a water jacket, and also comprises the above-mentioned flow guide pipe device.

[0027] It can be seen from the above technical solutions that the flow guide pipe device provided by the present invention, compared with the existing technical solutions, has a nested sliding connection between the lower conduit and the upper conduit, and can realize adaptive adjustment of the length of the flow guide pipe device by means of the buoyancy of the float ring, and realize detachable connection between the upper conduit and the water inlet of the crucible by snap connection, so as to accurately match crucibles of different specifications; at the same time, the flow guide pipe device can float in the water by adjusting the buoyancy of the float ring, which is convenient for installation and removal of the device.

[0028] The present invention further provides a metal smelting furnace, which has corresponding beneficial effects due to the adoption of the above-mentioned active flow guide pipe device. The details can be referred to the above description, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the matching structure of the flow guide tube device, the water jacket and the crucible provided in an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of the overall structure of a flow guide tube device provided in an embodiment of the present invention;

[0032] Figure 3a A schematic diagram of a first working state of a flow guide tube device provided by an embodiment of the present invention;

[0033] Figure 3b A schematic diagram of a second working state of the flow guide tube device provided by an embodiment of the present invention;

[0034] Figure 3c A schematic diagram of a third working state of the flow guide tube device provided by an embodiment of the present invention;

[0035] Figure 4 A schematic diagram of the structure of the downcomer and other components provided by an embodiment of the present invention;

[0036] Figure 5 A schematic diagram of the structure of the upper conduit and other components provided in an embodiment of the present invention;

[0037] Figure 6A schematic diagram of the structure of a first annular positioning plate provided in an embodiment of the present invention;

[0038] Figure 7 A schematic diagram of the structure of a second annular positioning plate provided in an embodiment of the present invention;

[0039] Figure 8 A schematic diagram of a floating ring structure provided in an embodiment of the present invention.

[0040] The meanings of the reference numerals in the figures are as follows:

[0041] 10 is a water jacket, 11 is a water supply port of the water jacket, and 12 is a water outlet of the water jacket;

[0042] 20 is a pipeline assembly, 21 is a lower conduit, 211 is a second limiting ring, 22 is an upper conduit, 221 is a first limiting ring, 222 is a first water sealing ring, 23 is a first annular guide structure, 231 is a first flange, 232 is a first annular positioning plate, 233 is a second flange, 234 is a guide pipe, a second water sealing ring 235, 24 is a second annular guide structure, 241 is a third flange, 242 is a second annular positioning plate, 243 is a fourth flange, 244 is a positioning pipe, and 25 is a floating ring;

[0043] 30 is a crucible, 31 is a crucible bottom pad, and 32 is a crucible water inlet. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] The flow guide tube device provided in the embodiment of the present invention is applied to crucible cooling, such as Figure 1-Figure 8 As shown, the pipe assembly 20 is assembled in the water jacket 10;

[0046] The pipeline assembly 20 includes: a lower conduit 21, an upper conduit 22, a first annular guide structure 23, a second annular guide structure 24 and a floating ring 25. The water outlet of the lower conduit 21 and the water inlet of the upper conduit 22 are nested and slidably connected; the lower conduit 21 and the upper conduit 22 constitute a conduit;

[0047] The inner ring wall of the first annular guide structure 23 is fixedly sleeved on the outer peripheral wall of the downpipe 21. When the downpipe 21 slides downward under the action of gravity, the water inlet of the downpipe 21 is clamped to the water supply port 11 of the water jacket 10 based on the guidance of the first annular guide structure 23.

[0048] The inner ring wall of the second annular guide structure 24 is fixedly sleeved on the outer peripheral wall of the upper guide tube 22;

[0049] The floating ring 25 is annular, and the inner ring of the floating ring 25 is movably sleeved on the outer peripheral wall of the catheter, and the floating ring 25 is located between the first annular guide structure 23 and the second annular guide structure 24;

[0050] When the buoyancy generated by the float ring 25 acts on the second annular guide structure 24 , the upper conduit 22 is guided by the second annular guide structure 24 , and the water outlet of the upper conduit 22 is clamped to the crucible water inlet 32 ​​of the crucible bottom pad 31 .

[0051] In the above technical solution, first, the guide tube device is assembled in the water jacket 10, and the water inlet of the lower guide tube 21 is clamped to the water jacket water supply port 11 of the water jacket 10 under the action of gravity and the action of the first annular guide structure 23. Then, the upper guide tube 22 generates an upward thrust to the second annular guide structure 24 under the action of the buoyancy of the float ring 25. Since the second annular guide structure 24 also plays a limiting role, under the action of the thrust, the water outlet of the upper guide tube 22 and the crucible water inlet 32 ​​are clamped, so that the coolant can flow from the water jacket water supply port 11 of the water jacket 10, through the lower guide tube 21 and the upper guide tube 22, from the crucible water inlet 32 ​​to the crucible bottom pad 31, so as to cool the crucible bottom pad 31. Compared with the existing technical solutions, the present technical solution has a nested sliding connection between the lower conduit 21 and the upper conduit 22, and the buoyancy of the float 25 can be used to achieve adaptive adjustment of the length of the guide tube device, and the detachable connection between the upper conduit 22 and the crucible water inlet 32 ​​is achieved by snapping, so as to accurately match crucibles 30 of different specifications; at the same time, by adjusting the buoyancy of the float 25, the guide tube device can float in the water, which is convenient for installation and removal of the device.

[0052] In one possible implementation, Figure 2 As shown, the outer peripheral wall of the water inlet of the upper conduit 22 is slidably nested in the inner peripheral wall of the water outlet of the lower conduit 21. In this technical solution, the upper conduit 22 and the lower conduit 21 are slidably nested, so that the upper conduit 22 can be extended and retracted relative to the lower conduit 21 under the action of buoyancy. The extension and retraction process can refer to Figure 3a-3c .

[0053] Optimize the above technical solutions, such as Figure 2 As shown, the outer peripheral wall of the water inlet of the upper conduit 22 is sleeved with a first limiting ring 221, and the inner peripheral wall of the water outlet of the lower conduit 21 is sleeved with a second limiting ring 211, and the outer diameter of the first limiting ring 221 is larger than the inner diameter of the second limiting ring 211 (that is, the outer diameter of the first limiting ring 221 is larger than the inner diameter of the second limiting ring 211). With this arrangement, the first limiting ring 221 and the second limiting ring 211 work together to prevent the guide tube device from failing during the length adaptive adjustment process.

[0054] Further optimize the above technical solution, such as Figure 2 As shown, in order to ensure the sealing between the lower conduit 21 and the upper conduit 22 and prevent a large flow of cooling circulating water from leaking at the connection between the lower conduit 21 and the upper conduit 22 during the operation of the flow tube device; a first water sealing ring 222 is also provided on the outer peripheral wall of the water inlet of the upper conduit 22, and the first water sealing ring 222 is located above the first limit ring 221.

[0055] In one possible implementation, Figure 2 and Figure 4 As shown, the first annular guide structure 23 includes: a first flange 231, a first annular positioning plate 232 and a second flange 233;

[0056] The first flange 231, the first annular positioning plate 232 and the second flange 233 are coaxially assembled in sequence to form a first annular guide structure 23. Preferably, the first annular guide structure 23 further includes a second water sealing ring 235, the first flange 231, the first annular positioning plate 232, the second water sealing ring 235 and the second flange 233 connected in sequence by bolts, such as Figure 4 As shown, in addition, a sealing rubber gasket is provided between the first flange 231 and the first annular positioning plate 232. The thickness of the sealing rubber gasket is 20 mm, the outer ring diameter of the end face of the sealing rubber gasket close to the second flange 233 is 144 mm, and the outer ring diameter of the end face away from the second flange 233 is 108 mm.

[0057] Among them, the inner ring of the first flange 231 is fixedly sleeved on the outer peripheral wall of the water inlet of the lower guide tube 21, and the outer diameter of the first annular positioning plate 232 is smaller than the inner peripheral wall diameter of the water jacket 10, which plays a limiting role; as a preference, the outer diameter of the first annular positioning plate 232 can be controlled within the negative deviation of the inner peripheral wall diameter of the water jacket 10 of 0~1mm.

[0058] In the present technical solution, the first flange 231 and the second flange 233, in addition to playing the role of the first annular positioning plate 232, also have a certain weight, so that the water inlet of the downcomer 21 can be clamped to the water jacket water supply port 11 under the action of gravity; so that the water inlet of the downcomer 21 can be clamped to the water jacket water supply port 11 of the water jacket 10 under the action of gravity; preferably, the first flange 231 and the downcomer 21 are welded as a whole, and the second flange 233 and the guide tube 234 are welded as a whole.

[0059] Optimize the above technical solutions, such as Figure 4As shown, the first annular guide structure 23 also includes: a guide tube 234, the guide tube 234 has a large diameter end and a small diameter end; the small diameter end is connected to the water inlet of the downcomer 21, and the large diameter end can be snapped into the water jacket water supply port 11. It can be understood that the water inlet of the downcomer 21 is connected to the water outlet of the water jacket 10 through the guide tube 234. In the present technical solution, the first annular positioning plate 232 and the guide tube 234 cooperate to ensure accurate connection with the water jacket water supply port 11; preferably, the diameter of the large diameter end is 152-219mm.

[0060] To further optimize the above technical solution, the radius of the large diameter end is larger than the radius of the water outlet of the water jacket, thereby improving the accuracy of docking between the guide tube 234 and the water supply port 11 of the water jacket and improving work efficiency.

[0061] In a possible implementation, Figure 2 and Figure 5 As shown, the second annular guide structure 24 includes: a third flange 241, a second annular positioning plate 242 and a fourth flange 243;

[0062] The third flange 241, the second annular positioning plate 242 and the fourth flange 243 are coaxially assembled in sequence to form the second annular guide structure 24; preferably, the third flange 241, the second annular positioning plate 242 and the fourth flange 243 are connected by bolts, such as Figure 5 As shown;

[0063] Among them, the inner ring of the third flange 241 is fixedly sleeved on the outer peripheral wall of the water inlet of the lower conduit 22, and the outer diameter of the second annular positioning plate 242 is smaller than the inner peripheral wall diameter of the water jacket 10 to play a limiting role. Preferably, the outer diameter of the second annular positioning plate 242 can be controlled within the negative deviation of the inner peripheral wall diameter of the water jacket 10 of 0~1mm; at the same time, the second annular positioning plate 242 can withstand the buoyancy of the float ring 25, and under the action of the buoyancy, the water outlet of the upper conduit 22 and the crucible water inlet 32 ​​are clamped.

[0064] Optimize the above technical solutions, such as Figure 5 As shown, the second annular guide structure 24 also includes: a positioning tube 244, one end of which is connected to the water outlet of the upper conduit 22, and the other end is connected to the crucible water inlet 32. The positioning tube 244 can ensure accurate connection with the crucible water inlet 32.

[0065] To optimize the above technical solution, the third flange 241 and the upper conduit 22 are welded as a whole, and the fourth flange 24 and the positioning tube 244 are welded as a whole.

[0066] In a possible embodiment, the float ring includes: a first float ring and a second float ring arranged along the axial direction of the conduit. Preferably, the float ring 25 can be made of a material such as a rubber ring with a density less than 1.0g / cm3 and capable of generating a gravity not less than that of the device itself. The outer diameter of the float ring 25 is not greater than the diameter of the first annular positioning plate 232 and the second annular positioning plate 242, and the overall minimum thickness of the float ring 25 is not greater than the length of the upper conduit 22. The float ring 25 generally uses an inflatable rubber shell (which can be hollow and not inflated).

[0067] The present invention also provides a metal smelting furnace, including: a crucible 30 and a water jacket 10, and also including the above-mentioned flow guide device. Since this solution adopts the above-mentioned flow guide device, it also has corresponding beneficial effects, which can be specifically referred to the above description and will not be repeated here.

[0068] The technical features mentioned above, the technical features to be mentioned below, and the technical features shown separately in the drawings can be combined with each other arbitrarily, as long as the combined technical features are not contradictory. All feasible feature combinations are technical contents clearly recorded in this article. Any of the multiple sub-features contained in the same sentence can be applied independently, and does not have to be applied together with other sub-features.

[0069] The present invention is further described below in conjunction with specific embodiments:

[0070] In the present technical solution, a flow guide tube device is a length-adaptive separate flow guide tube device for cooling circulating water between the crucible 30 and the water jacket 10. The invention of the flow guide tube device realizes all-round cooling of the crucible bottom pad, simplifies the difficulty of loading and unloading operations, ensures smooth production process, and saves the production cost of the crucible bottom pad.

[0071] In the first embodiment of this scheme, the use process of the flow guide tube device is as follows:

[0072] The first step is to adjust the buoyancy of the float 25 to be slightly greater than the gravity of the guide tube device itself, to ensure that the upper guide tube 22 is in a slightly floating state in the water, and the guide tube 234 is connected to the water jacket water supply port 11 under the action of gravity, and the guide tube 234 is always connected to the water jacket 20 during use.

[0073] Step 2: When loading the furnace, under the action of the first annular positioning plate 232 , the second annular positioning plate 242 , the positioning tube 244 and the floating ring 25 , the positioning tube 244 is automatically connected to the water inlet of the crucible bottom pad 31 .

[0074] In the third step, the cooling circulating water flows out from the water jacket water supply port 11 of the water jacket 10, and then flows to the crucible bottom pad 30 through the guide pipe 234, the lower conduit 21, the upper conduit 22, and the positioning pipe 244 in sequence, so as to achieve all-round cooling of the crucible bottom pad.

[0075] In the fourth step, the lower conduit 21 and the upper conduit 22 can be overlapped. When replacing the crucible 30 of different specifications, the buoyancy of the float ring 25 acts on the second annular positioning plate 242 to achieve adaptive adjustment of the length of the flow guide device.

[0076] Step 5: When the crucible is taken out of the furnace, the draft tube device floats to the water surface along with the crucible bottom pad 30, so that it is easy to take out.

[0077] In another embodiment of the present scheme, before using the flow guide device, the buoyancy of the float 25 is adjusted so that the buoyancy generated by the float 25 in the water is slightly greater than the gravity of the entire flow guide device, and the upper guide tube 22 is in a floating state in the water. When in use, the flow guide device is placed in the water jacket 10. At this time, due to the positioning effect of the first annular positioning plate 232 and the second annular positioning plate 242, the flow guide device is placed in the center of the water jacket, and the guide tube 234 automatically docks with the water supply port 11 of the water jacket under the action of gravity, and this process does not require human intervention; at this time, the water-cooled copper crucible (i.e., the crucible 30) is installed in the water jacket 10, and under the action of the second annular positioning plate 242, the positioning tube 244 is aligned with the crucible water inlet 32 ​​and connected.

[0078] When the cooling circulating water is turned on, the cooling circulating water is guided by the guide pipe device to the crucible bottom pad 31 to perform all-round cooling of the crucible bottom pad 31. The adaptive adjustment function of the guide pipe device length is realized by automatically adjusting the length of the upper guide pipe 22 retracted into the lower guide pipe 21 by the buoyancy of the float ring 25 acting on the second annular positioning plate 242. When the water-cooled copper crucible is taken out of the furnace after smelting or when a crucible of different specifications is replaced, there is no need to remove the guide pipe device. In addition, the maximum height of the guide pipe device is as follows: Figure 3a , (at this time, the first limiting ring 221 is at the upper limit position) At this time, the crucible bottom pad 31 and the bottom of the water jacket have the maximum size; its minimum height is as follows Figure 3c (At this time, the first limit ring 221 is located at the lower limit position), at this time, the crucible bottom pad 31 and the bottom of the water jacket 10 have a minimum size. Within this range, the adaptive adjustment of the guide tube length will not fail. The upper conduit 21 of the guide tube device can overlap with the lower conduit 22. Usually, the lengths of the upper and lower conduits are similar to obtain the maximum adaptive adjustment length. The maximum and minimum heights depend on the adaptation of the height of the crucible 30 and the height of the water jacket 10. When the guide tube device needs to be taken out, it is only necessary to fill the cooling circulating water in the water jacket 10, and the guide tube device will float on the water surface and then be taken out. The operation of this process is extremely simple; in the above-mentioned scheme, the cooling circulating water in the water jacket 10 is filled, and when the buoyancy is greater than the clamping force between the water inlet of the lower conduit 21 and the water supply port 11 of the water jacket, the water inlet of the lower conduit 21 and the water supply port 11 of the water jacket are automatically separated.

[0079] In another embodiment of the present scheme, the specifications of the components of the flow guide tube device are as follows:

[0080] Positioning tube 244 (Ф108×4×60mm, stainless steel), fourth flange 243 (DN100mm, stainless steel), second annular positioning plate 242 (Ф870×Ф110×5mm, stainless steel), third flange 241 (DN100mm, stainless steel), upper guide tube 22 (Ф108×4×about 960mm, stainless steel), floating ring 25 (Ф800×Ф500×100mm, rubber inflatable material), first water sealing ring 222 (Ф144×Ф108×20mm, PVC material), second limiting ring 211 (Ф140×Ф108×20mm, not stainless steel), the second limiting ring 211 (Ф144×Ф108×20mm, PVC material), the downcomer 21 (Ф152×4×about 900mm, stainless steel), the first flange 231 (DN152mm, stainless steel), the first annular positioning plate 232 (Ф870×Ф148×5mm, stainless steel), the second water sealing ring 235 (Ф152×(Ф144→Ф108)×20mm, rubber material), the second flange 242 (DN152mm, stainless steel), the guide pipe 234 ((Ф152→Ф219)×about 50mm) and M20×60mm connecting bolts. The first limiting ring 221 is connected to the upper conduit 22 by welding; the first limiting ring 221 is connected to the first water sealing ring 222 by bolts; the second limiting ring 211 is connected to the lower conduit 21 by welding; the floating ring 25 is sleeved between the first annular positioning plate 232 and the second annular positioning plate 242.

[0081] To optimize the above technical solution, when a larger diversion flow rate is required, the first annular positioning plate 232 and the second annular positioning plate 242 are usually selected to have a larger thickness to obtain sufficient rigidity to ensure the positioning and guiding function; at the same time, the first annular positioning plate 232 and the second annular positioning plate 242 and corresponding flanges and other components will also be selected to have larger specifications.

[0082] To further optimize the above technical solution, the flange components, upper conduit 21, and lower conduit 22 can be made of mature market specifications and sizes, and their materials are usually stainless steel (other corrosion-resistant materials can also be selected); the first annular positioning plate 232 and the second annular positioning plate 242 are usually made of stainless steel plates with a thickness of 3 to 10 mm (other corrosion-resistant materials can also be selected); the water sealing ring is usually made of wear-resistant materials such as rubber; all connecting bolts should be made of stainless steel (other corrosion-resistant materials can also be selected).

[0083] The beneficial effects of the present invention include the following:

[0084] (I) Automatic positioning function: Based on the first annular positioning plate, the second annular positioning plate and the guide tube, under the action of gravity, the lower end of the guide tube device is automatically connected to the water outlet pipe of the water jacket; based on the first annular positioning plate, the second annular positioning plate and the positioning tube, under the action of buoyancy, the upper end of the guide tube device is automatically connected to the water inlet of the crucible bottom pad.

[0085] (ii) Length Adaptation: The upper and lower guide tubes can be overlapped, and the buoyancy of the float ring acts on the second annular positioning plate to achieve adaptive adjustment of the length of the guide tube device to adapt to crucibles of different specifications.

[0086] (III) Separate type: The draft tube device does not need to be assembled with the crucible bottom pad, which greatly reduces the safety risk and operation difficulty of loading and unloading the furnace.

[0087] (IV) This device is a purely mechanical structure, which cleverly uses the principle of mechanics to achieve adaptive length adjustment and has high reliability. The buoyancy of the float ring is adjusted to achieve the floating state of the entire device in the water, which is convenient for the installation and removal of the device. This device does not need to be assembled with the crucible bottom pad, which greatly reduces the safety risks and operational difficulties of loading and unloading the furnace. This device is applied to the bottom of the crucible in the water jacket of a vacuum consumable melting furnace, and the directional diversion control of the cooling circulating water between the crucible and the water jacket is achieved through the cooperation of the first annular positioning plate, the second annular positioning plate, the positioning tube, and the guide tube.

[0088] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0089] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flow guide tube device, used for crucible cooling, characterized in that: include: A pipe assembly (20) assembled in the water jacket (10); The pipeline assembly (20) comprises: a lower conduit (21), an upper conduit (22), a first annular guide structure (23), a second annular guide structure (24) and a floating ring (25); the water outlet of the lower conduit (21) and the water inlet of the upper conduit (22) are nested and slidably connected; the lower conduit (21) and the upper conduit (22) constitute a conduit; The inner ring wall of the first annular guide structure (23) is fixedly sleeved on the outer peripheral wall of the lower conduit (21); when the lower conduit (21) slides downward under the action of gravity, the water inlet of the lower conduit (21) is clamped to the water jacket water supply port (11) of the water jacket (10) based on the guidance of the first annular guide structure (23); The inner ring wall of the second annular guide structure (24) is fixedly sleeved on the outer peripheral wall of the upper guide tube (22); The floating ring (25) is annular, the inner ring of the floating ring (25) is movably sleeved on the outer peripheral wall of the catheter, and the floating ring (25) is located between the first annular guide structure (23) and the second annular guide structure (24); When the buoyancy generated by the float ring (25) acts on the second annular guide structure (24), the upper conduit (22) is guided by the second annular guide structure (24), and the water outlet of the upper conduit (22) is clamped to the crucible water inlet (32) of the crucible bottom pad (31).

2. The flow guide tube device according to claim 1, characterized in that: The outer peripheral wall of the water inlet of the upper conduit (22) is slidably nested in the inner peripheral wall of the water outlet of the lower conduit (21).

3. The flow guide tube device according to claim 2, characterized in that: The outer peripheral wall of the water inlet of the upper conduit (22) is sleeved with a first limiting ring (221), and the inner peripheral wall of the water outlet of the lower conduit (21) is sleeved with a second limiting ring (211), and the outer diameter of the first limiting ring (221) is greater than the inner diameter of the second limiting ring (211).

4. The flow guide tube device according to claim 3, characterized in that: The outer peripheral wall of the water inlet of the upper conduit (22) is further provided with a first water sealing ring (222), and the first water sealing ring (222) is located above the first limiting ring (221).

5. The flow guide tube device according to claim 1, characterized in that: The first annular guide structure (23) comprises: a first flange (231), a first annular positioning plate (232) and a second flange (233); The first flange (231), the first annular positioning plate (232), and the second flange (233) are coaxially assembled in sequence to form the first annular guide structure (23); The inner ring of the first flange (231) is fixedly sleeved on the outer peripheral wall of the water inlet of the downpipe (21).

6. The flow guide tube device according to claim 5, characterized in that: The first annular guide structure (23) further comprises: a guide tube (234), the guide tube (234) having a large diameter end and a small diameter end; the small diameter end is connected to the water inlet of the downpipe (21), and the large diameter end can be snap-connected to the water supply port (11) of the water jacket.

7. The flow guide tube device according to claim 6, characterized in that: The radius of the large diameter end is greater than the radius of the water outlet of the water jacket.

8. The flow guide tube device according to claim 1, characterized in that: The second annular guide structure (24) comprises: a third flange (241), a second annular positioning plate (242) and a fourth flange (243); The third flange (241), the second annular positioning plate (242), and the fourth flange (243) are coaxially assembled in sequence to form a second annular guide structure (24); The inner ring of the third flange (241) is fixedly sleeved on the outer peripheral wall of the water inlet of the downpipe (21).

9. The flow guide tube device according to claim 8, characterized in that: The second annular guide structure (24) further comprises: a positioning tube (244), one end of the positioning tube (244) being connected to the water outlet of the upper conduit (22), and the other end of the positioning tube (244) being connected to the water inlet (32) of the crucible.

10. A metal smelting furnace, comprising: The crucible (30) and the water jacket (10), characterized by further comprising: a flow guide tube device according to any one of claims 1 to 9.

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