Anti-blocking tundish assembly and atomization powder making device
By introducing temperature measurement blind holes and temperature control components into the tundish assembly, combined with thermocouple wires and heating coils, precise temperature measurement and control of the molten metal in the tundish are achieved, solving the blockage problem caused by excessively low temperatures and ensuring the quality of atomized metal powder and the lifespan of the equipment.
Patent Information
- Application Number
- CN202520021530.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-01-06
AI Technical Summary
In the existing technology, the monitoring and control of the molten metal temperature in the intermediate ladle is characterized by low efficiency, high operational difficulty, and large temperature measurement errors, which leads to frequent blockages during the atomization powder production process, affecting powder quality and equipment lifespan.
A clog-resistant intermediate tundish assembly is designed, which adopts a temperature measurement blind hole and a temperature adjustment component, combined with thermocouple wire, heat conductor and heating coil. The control unit realizes accurate temperature measurement and timely temperature adjustment, avoiding the shortcomings of infrared temperature measurement, and a sealed temperature measurement device is set on the intermediate tundish to prevent damage from the opening.
It enables precise temperature measurement and timely temperature adjustment of the molten metal in the tundish, avoids clogging problems, ensures the quality of atomized metal powder, extends the service life of the equipment, and improves work efficiency and temperature measurement accuracy.
Smart Images
Figure CN223699323U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of anti-blocking tundish and atomization powder preparation device, belong to atomization powder preparation technical field. BACKGROUND
[0002] With the rapid development of metal 3D printing industry, the quality of metal powder will directly affect the subsequent printing quality. At present, the vacuum atomization powder preparation equipment is to break the metal melt into small droplets, and after cooling, a certain size of metal powder is prepared. The tundish is very important in the production process, which is used to leak the metal melt to the atomization chamber. Due to various reasons, the metal melt flow channel at the lower part of the tundish often appears to be blocked. The occurrence of the blocking phenomenon is instantaneous and unpredictable. Through long-term production experience, it is found that, in addition to the influence of various equipment parameters, the too low temperature of the metal melt in the tundish is an important reason for the occurrence of the blocking phenomenon. Therefore, the monitoring and control of the temperature of the metal melt in the tundish directly affects the atomization efficiency and the quality of the atomized metal powder. Currently, manual infrared temperature measurement or the use of temperature measurement devices are commonly used to measure the temperature. In the manual infrared temperature measurement, there are problems of low work efficiency, high operation difficulty and large temperature measurement error. In the temperature measurement by inserting the temperature measurement device into the inner cavity of the tundish, there are problems of cracking and damage of the tundish at the hole position, leakage of the atomization powder preparation process, and large temperature measurement error caused by the adhesion of metal impurities to the temperature measurement device. The two temperature measurement methods currently used have the problem of large temperature measurement error, which may cause excessive heating due to the large error. This is not conducive to the quality of the subsequent atomized metal powder, and may also reduce the service life of the tundish and the heating coil due to the high heating temperature. Therefore, it is of great practical significance to research a new type of tundish assembly. CONTENT OF THE UTILITY MODEL
[0003] The utility model provides a kind of anti-blocking tundish assembly and atomization powder preparation device in view of the deficiency of prior art.
[0004] The technical scheme for solving the above technical problems of the utility model is as follows: an anti-blocking tundish assembly, comprising: a tundish body, the upper end of the tundish is an inflow end, the lower end is an outflow end, a temperature measurement blind hole is provided in the side part of the tundish, and there is a certain distance between the inner blind end face of the temperature measurement blind hole and the inner wall of the tundish; a temperature adjusting assembly, which is covered outside the tundish, comprises a heat conductor and a heating coil, the heating coil is connected with a temperature adjusting power supply, and a through hole is provided in the heat conductor corresponding to the position of the temperature measurement blind hole; a temperature measurement assembly, which extends into the inner part of the temperature measurement blind hole after passing through the heating coil and the heat conductor from outside to inside, is used to feedback the temperature of the alloy melt in the tundish in real time; and a control unit, which is connected with the temperature adjusting assembly and the temperature measurement assembly.
[0005] Further, the temperature measuring assembly comprises a thermocouple wire and a temperature measuring flange connected to an external channel of the smelting furnace, one end of the thermocouple wire extends into the temperature measuring blind hole, and the other end is connected to the temperature measuring flange, and the control unit is connected to the thermocouple wire through the temperature measuring flange.
[0006] Further, the temperature measuring flange is provided with a terminal post, and the thermocouple wire is connected to the terminal post.
[0007] Further, the temperature measuring assembly further comprises a temperature measuring tube, the temperature measuring tube is inserted into the temperature measuring blind hole and extends outward through the heating coil and the heat conductor, and one end of the thermocouple wire extends into the temperature measuring tube.
[0008] Further, the temperature measuring tube is connected to the temperature measuring blind hole in an interference fit, and the inner diameter of the temperature measuring tube is 9mm-11mm.
[0009] Further, the temperature measuring tube is made of ceramic material, the tundish is made of zirconium dioxide or aluminum oxide material, and the heat conductor is made of graphite material.
[0010] Further, the distance L between the blind end face inside the temperature measuring blind hole and the inner wall of the tundish is 8mm-10mm.
[0011] Further, the temperature measuring flange is provided with a sealing gasket at the connection with the external channel of the smelting furnace.
[0012] Further, it further comprises a heat insulation box, the heat insulation box is located outside the heating coil, the bottom is open, the top is connected with a cover plate through bolts, and the cover plate is provided with a through hole for the tundish to extend out.
[0013] The utility model also provides a kind of atomization powder preparation device, including above-mentioned anti-blocking tundish assembly, still including smelting crucible being set in smelting furnace.
[0014] The utility model has the advantages that:
[0015] Through the cooperation between the components, accurate temperature measurement and timely temperature adjustment of the metal melt in the tundish during the atomization powder preparation process are ensured, the problems of blockage due to low temperature, low work efficiency, high operation difficulty and large temperature measurement error when using an infrared temperature measuring instrument are avoided, the problems of cracking and damage of the tundish at the hole position, liquid leakage during the atomization powder preparation process and large temperature measurement error caused by the adhesion of metal impurities to the temperature measuring device when the temperature measuring device is inserted into the inner cavity of the tundish through a through hole in the tundish are solved, and the problems of reduced service life of the tundish and the heating coil caused by high heating temperature due to large measurement error are solved. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1The structure schematic diagram of the atomization powder production device is provided in embodiment 2 of the utility model.
[0017] Figure 2 The partial structure schematic diagram of the tundish assembly is provided in embodiment 1 of the utility model.
[0018] Figure 3 The temperature measuring flange structure schematic diagram is provided in embodiment 1 of the utility model.
[0019] Figure 4 For Figure 2 The enlarged view of A.
[0020] The figure mark: 1, tundish;10, inflow end;11, outflow end;12, temperature measuring blind hole;121, blind end face;13, inner wall;2, heat conduction body;3, heating coil;4, temperature adjusting power supply;5, control unit;6, thermocouple wire;7, temperature measuring flange;71, terminal post;8, external passage;9, temperature measuring tube;14, heat insulation box;15, cover plate;16, smelting crucible. DETAILED DESCRIPTION
[0021] The specific embodiment of the utility model is described in detail below. The utility model can be implemented in many ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, therefore the utility model is not limited by the disclosed specific embodiments.
[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terms used are only for describing specific embodiments, not for limiting the utility model.
[0023] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model to a specific orientation, structure and operation, and therefore cannot be understood as limiting the utility model.
[0024] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "setting" should be understood broadly, for example, it can be fixedly connected, set, or it can be detachably connected, set, or integrally connected, set. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0025] Embodiment 1
[0026] As Figures 1-3 shown, the utility model provides a kind of anti-blocking tundish 1 assembly, comprising: tundish 1 body, the upper end of the tundish 1 is metal melt inflow end 10, lower end is metal melt outflow end 11, its side part is equipped with temperature measuring blind hole 12, there is a certain distance between the temperature measuring blind hole 12 internal blind end face 121 and the tundish 1 inner wall 13, blind end face 121 is the face of temperature measuring blind hole 12 closest to the tundish 1 inner wall 13, the tundish 1 is zirconium dioxide or alumina material quality;Temperature regulating component, the temperature regulating component is covered in the tundish 1 outside, it includes heat conductor 2 and heating coil 3, specifically the heat conductor 2 is covered in the tundish 1 outside, the heating coil 3 is covered in the heat conductor 2 outside, the heating coil 3 is connected with temperature regulating power supply 4, the temperature regulating power supply 4 is heating coil 3 to provide energy to make it heat the heat conductor 2, the heat conductor 2 transmits heat to tundish 1, to make metal melt maintain in reasonable state, the heat conductor 2 is equipped with through-hole at the position corresponding to the temperature measuring blind hole 12, the heat conductor 2 is graphite material quality;Temperature measuring component, the temperature measuring component is sequentially passed through the heating coil 3 and heat conductor 2 from outside to inside and then extends into the temperature measuring blind hole 12 inside, it is used for real-time feedback alloy melt temperature in tundish 1;Control unit 5, the control unit 5 is connected with the temperature regulating component and the temperature measuring component.It needs to point out that, control unit 5 contains PLC control system and temperature indicating device, temperature indicating device is electrically connected with temperature measuring component, for real-time display metal melt temperature;PLC control system then compares the temperature that temperature indicating device feedbacks with the temperature threshold value that system sets, according to the comparison result, temperature regulating component is sent to the heating or heat preservation signal, to realize the real-time regulation and control of metal melt temperature in tundish 1.
[0027] The present application ensures accurate temperature measurement and timely temperature adjustment of the metal melt in the tundish 1 during the atomization process through the cooperation of the components, solves the problem of blockage when the temperature is too low, ensures the quality of atomized metal powder, avoids the problems of low work efficiency, high operation difficulty and large temperature measurement error when using an infrared thermometer to measure the temperature frequently, avoids the problems of cracking and damage of the tundish 1 at the hole position, liquid leakage during the atomization process, and large temperature measurement error caused by the adhesion of metal impurities to the temperature measuring device when the temperature measuring device is inserted into the inner cavity of the tundish 1 through a hole in the tundish 1, and solves the problem of reduced service life of the tundish 1 and the heating coil 3 caused by the high heating temperature due to large measurement error.
[0028] Specifically, as Figures 2-3As shown, the temperature measuring assembly comprises a thermocouple wire 6 and a temperature measuring flange 7 connected to the outside passage 8 of the smelting furnace, one end of the thermocouple wire 6 extends into the temperature measuring blind hole 12, and the other end is connected with the temperature measuring flange 7, the control unit 5 is connected with the thermocouple wire 6 through the temperature measuring flange 7, it should be pointed out that the temperature measuring flange 7 is used for transmitting electrical signals and sealing the smelting furnace, so as to stabilize the vacuum environment in the furnace and further ensure the quality of the atomized metal powder, the temperature measuring flange 7 is detachably connected to the outside passage 8 of the smelting furnace, preferably, a sealing gasket is arranged at the connection between the temperature measuring flange 7 and the outside passage 8 of the smelting furnace. In order to facilitate wiring and signal transmission, the temperature measuring flange 7 is provided with a terminal post 71 on both sides, one terminal post 71 is connected with the thermocouple wire 6, and the other terminal post 71 is connected with the control unit 5 through a wire, in the embodiment of the application, the terminal post 71 is a threaded terminal post 71, in the actual manufacturing process, other types of terminal posts 71 can be arranged according to actual needs, and the type of the terminal post 71 shown in the embodiment of the application is not limited.
[0029] In order to further avoid measurement errors, the temperature measuring assembly is provided with two thermocouple wires 6, and the two thermocouple wires 6 are insulated and isolated by a ceramic insulating ring; the control unit 5 is configured to receive two temperatures detected by the two thermocouple wires 6, if the difference between one of the two temperatures and the other is large, and one of the two temperatures is obviously lower or higher than the daily temperature value, the control unit 5 sends an alarm signal to remind the staff to check whether damage occurs in time.
[0030] Specifically, as shown in the figure, Figure 2 The temperature measuring assembly further comprises a temperature measuring tube 9, the temperature measuring tube 9 is inserted into the temperature measuring blind hole 12 and extends outward through the heating coil 3 and the heat conductor 2, and one end of the thermocouple wire 6 extends into the temperature measuring tube 9. By arranging the temperature measuring tube 9, the temperature measuring precision is further ensured, and the service life of the thermocouple wire 6 is prolonged, because the temperature measuring tube 9 limits the positions of the heat conductor 2 and the tundish 1, and solves the problem that the thermocouple wire 6 is damaged due to being pulled by the positions of the heat conductor 2 and the tundish 1; secondly, through the heat conduction of the temperature measuring tube 9, the temperature in the internal region of the temperature measuring tube 9 is more constant, the temperature measuring precision is more accurate, and the problem of large temperature measuring error caused by local high temperature is avoided. Preferably, the temperature measuring tube 9 is made of high-temperature-resistant ceramic material.
[0031] Specifically, to further enhance the limiting effect, the temperature measuring tube 9 is interference connected with the temperature measuring blind hole 12, and the inner diameter of the temperature measuring tube 9 is 9-11mm. Through the size limitation, the relationship between the temperature measuring accuracy and the structural strength is further coordinated. If the inner diameter of the temperature measuring tube 9 is less than 9mm, the thermocouple wire 6 is easy to touch the inner wall 13 of the temperature measuring tube 9, which leads to inaccurate temperature measurement, and the limiting strength of the too thin temperature measuring tube 9 is weak, which is easy to deform or break in the long-term atomization process, and the maintenance cost in the later period is increased. If the inner diameter of the temperature measuring tube 9 is greater than 11mm, although the probability of the thermocouple wire 6 touching the inner wall 13 of the temperature measuring tube 9 is reduced, the size of the temperature measuring blind hole 12 opened on the side of the tundish 1 is correspondingly too large, which increases the probability of cracking and damage of the tundish 1 opening. Therefore, only when the inner diameter of the temperature measuring tube 9 is 9-11mm, the temperature measuring accuracy can be ensured, and the tundish 1 assembly of the present application has sufficient structural strength, which prolongs the service life.
[0032] Specifically, as shown in Figure 4 The distance L between the inner blind end surface 121 of the temperature measuring blind hole 12 and the inner wall 13 of the tundish 1 is 8-10mm. The size relationship is very critical. If the distance L is less than 8mm, the local structural strength of the tundish 1 is obviously insufficient, which is easy to crack during use and seriously affects the service life. If the distance L is greater than 10mm, although the service life of the tundish 1 is prolonged, the temperature measuring accuracy is poor, the measured temperature deviates greatly from the actual temperature, which leads to inaccurate temperature adjustment. Although it will not cause the metal melt to cool and block the outlet end 11 of the tundish 1, it will affect the quality of the atomized metal powder. When the distance L is 8-10mm, the local strength of the tundish 1 is ensured, and the difference between the measured temperature and the actual metal melt temperature in the tundish 1 can be controlled within ±5℃. Within this error range, it will not affect the quality of the atomized metal powder.
[0033] Specifically, as shown in Figures 1-2 It also includes a heat insulation box 14, which is located outside the heating coil 3, has an opening at the bottom, and is connected with a cover plate 15 at the top through bolts. The cover plate 15 is provided with a through hole for the tundish 1 to extend out. The heat insulation box 14 has a certain distance from the heating coil 3. Through this arrangement, the temperature of the metal melt in the tundish 1 can be further maintained, the subsequent heating and holding time is shortened, energy saving and emission reduction are achieved, further blockage is avoided, the quality of the atomized metal powder is ensured, and the heating coil 3 is protected to avoid collision damage or spatter of the metal melt when pouring to affect the heating efficiency.
[0034] Example 2
[0035] As Figure 1As shown, the utility model provides a kind of atomization powder preparation device, including the anti-blocking intermediate ladle 1 assembly described in embodiment 1, still including the smelting crucible 16 being set in smelting furnace.Melting crucible 16 is used to smelt metal to be atomized, and metal melt can be poured into intermediate ladle 1 after smelting is completed.
[0036] Working process:
[0037] First, the metal to be atomized is placed into smelting crucible 16, and heated into metal melt, control smelting crucible 16 pours metal melt into intermediate ladle 1, then temperature measuring assembly measures the temperature of metal melt in intermediate ladle 1 in real time and feeds back to control unit 5, control unit 5 compares measured temperature with set temperature in real time, if measured temperature is lower than set temperature, control unit 5 sends temperature adjusting assembly to send temperature signal, temperature adjusting power supply 4 outputs power to heating coil 3, heating coil 3 generates heat and uniformly transmits heat to intermediate ladle 1 through heat conductor 2, when measured temperature reaches set temperature, control unit 5 sends low-power temperature maintaining signal to temperature adjusting assembly, so as to maintain the temperature of metal melt in intermediate ladle 1 in set temperature range, then metal atomization operation is carried out.
[0038] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, all possible combinations of the technical features in the above-described embodiments are not exhaustively listed, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.
[0039] For those skilled in the art, without departing from the concept of the utility model, a number of variations and improvements can be made, which belong to the protection scope of the utility model, and the protection scope of the utility model is subject to the appended claims.
Claims
1. A clog-resistant intermediate batch assembly, characterized in that, include: The intermediate package body has an inflow end at the upper end and an outflow end at the lower end, and a temperature measurement blind hole is opened on its side. The blind end face inside the temperature measurement blind hole is at a certain distance from the inner wall of the intermediate package. A temperature control component, which is covered outside the intermediate package, includes a heat conductor and a heating coil. The heating coil is connected to a temperature control power supply. The heat conductor has a through hole corresponding to the position of the temperature measuring blind hole. A temperature measuring component, which passes through the heating coil and the heat conductor from the outside to the inside and extends into the temperature measuring blind hole, is used to provide real-time feedback on the temperature of the alloy melt in the tundish. A control unit is connected to the temperature control component and the temperature measurement component.
2. The anti-clogging intermediate batch assembly according to claim 1, characterized in that, The temperature measuring component includes a thermocouple wire and a temperature measuring flange connected to the external channel of the melting furnace. One end of the thermocouple wire extends into the temperature measuring blind hole, and the other end is connected to the temperature measuring flange. The control unit is connected to the thermocouple wire through the temperature measuring flange.
3. The anti-clogging intermediate batch assembly according to claim 2, characterized in that, The temperature measuring flange is provided with a terminal block, and the thermocouple wire is connected to the terminal block.
4. The anti-clogging intermediate batch assembly according to claim 2, characterized in that, The temperature measuring assembly also includes a temperature measuring tube, which is inserted into the temperature measuring blind hole and extends outward through the heating coil and the heat conductor. One end of the thermocouple wire extends into the temperature measuring tube.
5. The anti-clogging intermediate batch assembly according to claim 4, characterized in that, The temperature measuring tube is interference-fitted with the temperature measuring blind hole, and the inner diameter of the temperature measuring tube is 9 mm-11 mm.
6. The anti-clogging intermediate batch assembly according to claim 5, characterized in that, The temperature measuring tube is made of ceramic, the intermediate liner is made of zirconium dioxide or alumina, and the heat conductor is made of graphite.
7. The anti-clogging intermediate batch assembly according to claim 1, characterized in that, The distance L between the blind end face inside the temperature measuring blind hole and the inner wall of the intermediate tundish is 8 mm-10 mm.
8. The anti-clogging intermediate batch assembly according to claim 2, characterized in that, A sealing gasket is provided at the connection between the temperature measuring flange and the external channel of the melting furnace.
9. The anti-clogging intermediate batch assembly according to claim 1, characterized in that, It also includes a heat insulation box located outside the heating coil, with an opening at the bottom and a cover plate bolted to the top, the cover plate having a through hole for the intermediate tundish to extend out.
10. An atomizing powder-making device, characterized in that, It includes the anti-clogging intermediate ladle assembly as described in any one of claims 1-8, and also includes a melting crucible disposed within a melting furnace.