Vacuum chamber device

Abstract

The utility model discloses a vacuum chamber device, a vacuum chamber in the vacuum chamber device is communicated with at least two blanking channels with controllable on-off, each blanking channel is communicated with at least two blanking pipes through a corresponding transition pipe, each blanking pipe is correspondingly communicated with a vacuum blanking bin, the vacuum blanking bin is provided with a blanking port with controllable on-off, and the blanking port is communicated with the transition pipe. Materials can enter different positions in the vacuum chamber through the at least two discharging channels, molten steel components are rapidly homogenized, and the purpose of rapidly adjusting alloy components is achieved. Blanking can be performed from different vacuum blanking bins, the blanking efficiency and the blanking error-tolerant rate can be improved, the material blanking time can be shortened by more than half, uniform mixing of molten steel is ensured, production accidents caused by single increase of the blanking speed are prevented, the production efficiency can be quickly improved, the smelting cost is reduced, and the production stability and the molten steel quality are improved; the quality of the finally obtained steel grade is improved, and the technical problem that the quality of the finally obtained steel grade is affected is solved to a certain extent.

Description

Technical Field

[0001] This application belongs to the technical field of steelmaking refining, and particularly relates to a vacuum chamber device. Background Art

[0002] The RH vacuum degassing method is a steelmaking method. Vacuum is pumped in the vacuum chamber, and argon gas is blown into the rising pipe of the immersion tube, so that the molten steel in the ladle enters the vacuum chamber, and then the molten steel flows back to the ladle from another downcomer in the immersion tube in a cyclic and repeated process. The vacuum chamber is also provided with a blanking channel, and alloys and the like enter the molten steel in the vacuum chamber through the blanking channel to adjust the alloy composition of the molten steel, so that the molten steel reaches the corresponding quality performance.

[0003] Currently, when using the RH vacuum degassing method to smelt some steel grades such as silicon steel, a large amount of alloy materials in tons need to be added to the vacuum furnace through the blanking channel. However, the excessive use of alloy materials will lead to too long a single blanking time. Too long a blanking time will result in a long vacuum treatment time in the vacuum chamber, which in turn will lead to an increase in production costs and uncertainty in product quality, affecting the quality of the final steel grade obtained. Utility Model Content

[0004] This application aims to at least solve to some extent the technical problem that the quality of the finally obtained steel grade is affected. For this purpose, this application provides a vacuum chamber device.

[0005] The embodiment of this application provides a vacuum chamber device, including a vacuum chamber, at least two blanking channels, a transition pipe, multiple blanking pipes, and a vacuum blanking bin.

[0006] Both ends of the blanking channel with controllable on-off are respectively communicated with the vacuum chamber and one end of the corresponding transition pipe. The other end of the transition pipe is communicated with one end of at least two blanking pipes. The other end of the blanking pipe is correspondingly communicated with a vacuum blanking bin, and the vacuum blanking bin is provided with a blanking port with controllable switch.

[0007] In some embodiments, the vacuum tank of the vacuum chamber is a cylindrical tank. One end of the blanking channel is communicated with the side of the vacuum tank, and at least two blanking channels are equidistantly spaced along the circumference of the vacuum tank. The diameter of the vacuum tank is 5 to 8 times the inner diameter of the blanking channel.

[0008] In some embodiments, both ends of the blanking pipe are respectively an inlet end communicated with the vacuum blanking bin and a transition end communicated with the transition pipe, and the pipe diameter of the blanking pipe increases from the inlet end to the transition end.

[0009] In some embodiments, there is an included angle between the axes of at least two blanking pipes communicated with the same transition pipe.

[0010] In some embodiments, the transition pipe includes:

[0011] A pipe body, one end of which is coaxially supported on the blanking channel;

[0012] A sleeve, fixedly sleeved on the pipe body;

[0013] At least two telescopic cylinders spaced around the pipe body, one end of which is fixedly connected to the sleeve and the other end abuts against the blanking channel.

[0014] In some embodiments, the pipe body includes a first section and a second section with an included angle between their axes.

[0015] In some embodiments, a high-temperature resistant coating is provided on the inner peripheral wall of the transition pipe.

[0016] In some embodiments, the blanking channel includes:

[0017] A connecting section, one end of which is communicated with the vacuum chamber, and a high-temperature resistant material layer is provided on the inner peripheral wall of the connecting section;

[0018] A supporting section, both ends of which are respectively communicated with the connecting section and the transition pipe, and there is an included angle with the connecting section.

[0019] In some embodiments, the supporting section is provided with coolant through holes spaced from its inner hole.

[0020] In some embodiments, the vacuum blanking bin includes:

[0021] A vacuum bin body, communicated with the blanking pipe;

[0022] A funnel, the lower opening of which is inserted into the vacuum bin body and is configured as the blanking port:

[0023] A plug, used to block the blanking port;

[0024] A conical cylinder, the smaller-diameter end of which is communicated with the lower opening, and the larger-diameter end faces the blanking pipe.

[0025] Beneficial effects provided by one or more embodiments of the present application:

[0026] In the vacuum chamber device, the vacuum chamber is connected to at least two feed channels that can be controlled to be opened and closed. Each feed channel is connected to at least two feed pipes through a corresponding transition pipe. Each feed pipe is correspondingly connected to a vacuum feed bin. The vacuum feed bin is provided with a feed opening that can be controlled by a switch. Materials can enter the vacuum feed bin through the switch-controlled feed opening, and then enter the vacuum chamber from the vacuum feed bin through the feed pipe, transition pipe, and feed channel in sequence to adjust the quality of molten steel. Since the vacuum chamber in the vacuum chamber device is connected to at least two feed channels, for example, alloy materials can enter different positions in the vacuum chamber through at least two feed channels, quickly and evenly mixing the molten steel composition, achieving the purpose of quickly adjusting the alloy composition. And each feed channel is connected to at least two feed pipes and the vacuum feed bin through a corresponding transition pipe, and can feed from different vacuum feed bins, which can improve the feeding efficiency and the error tolerance of feeding. The feeding time of materials can be shortened by more than half and the uniform mixing of molten steel can be ensured, preventing production accidents caused by simply increasing the feeding speed. The feed channels and the feed openings of the vacuum feed bins are both controllable to be opened and closed, which can also ensure the vacuum purity, improve the safety of steelmaking, and be beneficial to ensuring the quality of molten steel, quickly improving the production efficiency, reducing the smelting cost, enhancing the stability of production and the quality of molten steel, so as to improve the quality of the finally obtained steel grade and solve to a certain extent the technical problem that the quality of the finally obtained steel grade is affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It shows a schematic structural diagram of a vacuum chamber in some embodiments or certain embodiments of the present application.

[0029] Figure 2 It shows a schematic structural diagram of a feed channel in some embodiments or certain embodiments of the present application.

[0030] Description of the reference numerals: 1, vacuum chamber; 11, vacuum tank; 2, feed channel; 21, connection section; 22, support section; 23, cooling pipe; 24, high-temperature refractory layer; 3, transition pipe; 31, pipe body; 311, first section; 312, second section; 32, sleeve; 33, telescopic cylinder; 4, feed pipe; 41, inlet end; 42, transition end; 5, vacuum feed bin; 51, feed opening; 52, vacuum bin body; 53, funnel; 54, conical cylinder; 6, dipping tube; 7, control valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] It should be noted that all directional indications in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If this specific posture changes, the directional indication will also change accordingly.

[0033] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0035] In the related art, due to the periodic temperature change of the furnace charge during the overall production process, the periodic temperature change of the furnace charge will cause some substances in the furnace charge to soften and then harden. After multiple cycles, the furnace charge may be agglomerated, so it is easy to block the material when pouring into the feed pipe, and there is a technical problem that the normal operation of the vacuum chamber device may be affected by the possible blockage of the material. The embodiments of the present application provide a vacuum chamber device, which can at least solve the above technical problems to a certain extent.

[0036] The following will describe the present application in conjunction with the accompanying drawings:

[0037] Figure 1 Shows a schematic structural diagram of the vacuum chamber in some embodiments or certain embodiments of the present application. Refer to Figure 1, an embodiment of the present application provides a vacuum chamber device, including a vacuum chamber 1, at least two blanking channels 2, a transition pipe 3, multiple blanking pipes 4, and a vacuum blanking bin 5.

[0038] Both ends of the blanking channel 2 with controllable on-off are respectively connected to the vacuum chamber 1 and one end of the corresponding transition pipe 3. The other end of the transition pipe 3 is connected to one end of at least two blanking pipes 4. The other end of the blanking pipe 4 is correspondingly connected to a vacuum blanking bin 5, and the vacuum blanking bin 5 is provided with a blanking port 51 with controllable switch.

[0039] The vacuum chamber 1 in the vacuum chamber device is connected with at least two blanking channels 2 with controllable on-off. Each blanking channel 2 is connected to at least two blanking pipes 4 through the corresponding transition pipe 3. Each blanking pipe 4 is correspondingly connected to a vacuum blanking bin 5. The vacuum blanking bin 5 is provided with a blanking port 51 with controllable switch. Materials can enter the vacuum blanking bin 5 from the blanking port 51 with controllable switch, and then enter the vacuum chamber 1 from the vacuum blanking bin 5 through the blanking pipe 4, the transition pipe 3 and the blanking channel 2 in sequence to adjust the quality of molten steel. Since the vacuum chamber 1 in the vacuum chamber device is connected with at least two blanking channels 2, for example, alloy materials can enter different positions in the vacuum chamber 1 through at least two blanking channels 2, quickly and evenly mix the molten steel composition, and achieve the purpose of quickly adjusting the alloy composition. And each blanking channel 2 is connected to at least two blanking pipes 4 and the vacuum blanking bin 5 through the corresponding transition pipe 3, and materials can be discharged from different vacuum blanking bins 5, which can improve the blanking efficiency and the fault tolerance rate of blanking. The blanking time of materials can be shortened by more than half and the uniform mixing of molten steel can be ensured, preventing production accidents caused by simply increasing the blanking speed. The blanking channels 2 and the blanking ports 51 of the vacuum blanking bins 5 are both controllable in on-off, which can also ensure the vacuum purity, improve the safety of steelmaking and is beneficial to ensuring the quality of molten steel, can quickly improve the production efficiency, reduce the smelting cost, improve the stability of production and the quality of molten steel, so as to improve the quality of the finally obtained steel grade, and to a certain extent solve the technical problem that the quality of the finally obtained steel grade is affected.

[0040] And each blanking channel 2 is connected to at least two blanking pipes 4 and the vacuum blanking bin 5 through the transition pipe 3. Multiple vacuum blanking bins 5 can be used to place or store materials of different materials, which is beneficial to improving the versatility of the vacuum chamber 1 and is also beneficial to adjusting the alloy material of the molten steel entering the vacuum chamber 1 according to the steel grade.

[0041] In some embodiments, the number of the blanking channels 2 of the vacuum chamber device can be 2 to 5, which is convenient for setting and is also beneficial to ensuring the service life of the vacuum chamber 1.

[0042] In some embodiments, the vacuum tank 11 of the vacuum chamber 1 may be a cylindrical tank. One end of the blanking channel 2 is connected to the side of the vacuum tank 11, and at least two blanking channels 2 may be equidistantly spaced along the circumference of the vacuum tank 11. The diameter of the vacuum tank 11 may be 5 to 8 times the inner diameter of the blanking channel 2.

[0043] When the vacuum tank 11 of the vacuum chamber 1 is a cylindrical tank and the blanking channel 2 is arranged as above, the blanking efficiency can be effectively improved and the service life of the vacuum chamber 1 can be ensured.

[0044] It should be noted that the vacuum chamber 1 for the RH vacuum degassing method usually has a vacuum tank 11.

[0045] In some embodiments, the vacuum chamber 1 and the blanking channel 2 may be integrally formed. This is convenient for preparation and is beneficial to the vacuum degree of the vacuum chamber 1.

[0046] In some embodiments, the vacuum chamber device may further include an immersion tube 6. The immersion tube 6 is connected to the vacuum tank 11 and is spaced from the blanking channel 2. When the vacuum tank 11 is a cylindrical tank, the immersion tube 6 may be connected to one end of the vacuum tank 11.

[0047] In some embodiments, the two ends of the blanking pipe 4 are respectively an inlet end 41 connected to the vacuum blanking bin 5 and a transition end 42 connected to the transition pipe 3. The diameter of the blanking pipe 4 increases from the inlet end 41 to the transition end 42.

[0048] The diameter of the blanking pipe 4 increases from the inlet end 41 to the transition end 42, which can reduce the possibility of material blockage during the process of the material passing through the blanking pipe 4 and entering the transition pipe 3 and the blanking channel 2, and is beneficial to ensuring the normal operation of the vacuum chamber 1.

[0049] In some embodiments, there is an angle between the axes of at least two blanking pipes 4 connected to the same transition pipe 3.

[0050] There is an angle between the axes of at least two blanking pipes 4 connected to the same transition pipe 3, which can make there be a certain distance between the two blanking pipes 4 and one end of the vacuum blanking bin 5, facilitating the installation and cooperation of the vacuum blanking bin 5 and the blanking operation.

[0051] In some embodiments, at least two blanking pipes 4 and the transition pipe 3 may be connected through structures such as joints. The connection mode between the joint and the transition pipe 3 may be a fixed connection or a detachable connection.

[0052] Figure 2 The structural schematic diagram of the blanking channel in some embodiments or certain embodiments of the present application is shown. Refer to Figure 2 , in some embodiments, the transition pipe 3 includes:

[0053] The pipe body 31 is coaxially supported at one end by the blanking channel 2.

[0054] The sleeve 32 is fixedly sleeved on the pipe body 31.

[0055] At least two telescopic cylinders 33 spaced around the pipe body 31, one end is fixedly connected to the sleeve 32, and the other end abuts against the blanking channel 2.

[0056] The transition pipe 3 is supported on the blanking channel 2 through the pipe body 31, and the sleeve 32 fixedly sleeved on the pipe body 31 is fixedly connected to one end of at least two telescopic cylinders 33 spaced around the pipe body 31, providing a support point for the telescopic cylinders 33 spaced around the pipe body 31. The other end of the telescopic cylinder 33 abuts against one end of the blanking channel 2. Then the telescopic cylinder 33 can extend while abutting against the blanking channel 2, so that the other end of the telescopic cylinder 33, the sleeve 32 and the pipe body 31 of the transition pipe 3 are separated relative to the blanking channel 2. It is convenient to disassemble the transition pipe 3 and the blanking channel 2, so as to facilitate the maintenance of the blanking channel 2 and the vacuum chamber 1. Since the size specifications of the vacuum chamber 1, the blanking channel 2, etc. are usually relatively large, the specifications of the transition pipe 3, the blanking pipe 4, etc. are not small either. It can be supported on the blanking channel 2 by its own gravity and ensure the seal between the transition pipe 3 and the blanking channel 2.

[0057] In some embodiments, the sleeve 32 can be sleeved on one end of the pipe body 31 supported by the blanking channel 2 and fixedly welded to the outer peripheral wall of the pipe body 31. The axis of the telescopic cylinder 33 can extend along the axis of one end of the pipe body 31 supported by the blanking channel 2. It can achieve stable separation between the transition pipe 3 and the blanking channel 2.

[0058] In some embodiments, a coaxial sealing ring is provided between the pipe body 31 and the blanking channel 2. It can improve the sealing effect between the pipe body 31 and the blanking channel 2.

[0059] In some embodiments, the pipe body 31 includes a first section 311 and a second section 312 with an included angle between their axes. It can stagger the blanking pipe 4 and the blanking channel 2, which is convenient for overall installation and maintenance. The connection between the first section 311 and the second section 312 and the blanking pipe 4 and the blanking channel 2 can be set according to requirements. In some embodiments of the present application, the first section 311 can be communicated with the blanking channel 2, and the second section 312 can be communicated with the blanking pipe 4. The length of the second section 312 is greater than the length of the first section 311. It is convenient for overall assembly.

[0060] In some embodiments, the transition pipe 3 can also be set as a straight pipe for installing structures such as the sleeve 32.

[0061] In some embodiments, a high-temperature resistant coating is provided on the inner peripheral wall of the transition pipe 3. It can improve the service life of the transition pipe 3.

[0062] In some embodiments, the blanking channel 2 may include:

[0063] A connecting section 21, one end of the connecting section 21 is communicated with the vacuum chamber 1, and a high-temperature resistant material layer 24 is provided on the inner peripheral wall of the connecting section 21.

[0064] A supporting section 22, the two ends are respectively communicated with the connecting section 21 and the transition pipe 3, and there is an included angle with the connecting section 21.

[0065] The connecting section 21 of the blanking channel 2 is communicated with the vacuum chamber 1 and the inner peripheral wall of the connecting section 21 is provided with a high-temperature resistant material layer 24, which is beneficial to extending the overall service life of the vacuum chamber device. There is an included angle between the connecting section 21 and the supporting section 22 of the blanking channel 2, which is convenient for adjusting the blanking direction of the material.

[0066] In some embodiments, the supporting section 22 can be used to support the pipe body 31 of the transition pipe 3, and a coaxial annular flange can be provided at the end of the supporting section 22 to cooperate and abut with the pipe body 31 and one end of the telescopic cylinder 33.

[0067] In some embodiments, a control valve 7 such as a flap valve can be provided on the supporting section 22 of the blanking channel 2. The on-off of the blanking channel 2 can be realized.

[0068] In some embodiments, when the vacuum groove 11 of the vacuum chamber 1 is a cylindrical groove, the blanking channel 2 includes a connecting section 21 and a supporting section 22, and the transition pipe 3 includes a first section 311 and a second section 312, the axis of the supporting section 22 of the blanking channel 2 and the axis of the first section 311 of the transition pipe 3 can both be arranged along the axis of the vacuum groove 11. There are included angles with the same angle between the axis of the connecting section 21 of the blanking channel 2, the axis of the second section 312 of the transition pipe 3, the axis of the blanking pipe 4 and the axis of the vacuum groove 11. It is convenient for the material to stably fall into the vacuum groove 11 of the vacuum chamber 1, which is beneficial to improving the falling and mixing rate of the material.

[0069] In some embodiments, the supporting section 22 is provided with coolant through holes (not shown in the figure) spaced from its inner hole. The coolant through holes can flow through the coolant to play a role in dissipating heat and cooling the blanking channel 2, and improving the overall service life. Refer to Figure 2 , a cooling pipe 23 can also pass through the coolant through holes of the supporting section 22, and the coolant passes through the cooling pipe 23.

[0070] In some embodiments, the vacuum blanking bin 5 may include:

[0071] A vacuum bin body 52, which is communicated with the blanking pipe 4.

[0072] A funnel 53, the lower opening is inserted into the vacuum bin body 52 and is configured as a blanking port 51.

[0073] A blockage (not shown in the figure) is used to block the material discharge port 51.

[0074] A conical cylinder 54, with the smaller-diameter end communicating with the lower opening and the larger-diameter end facing the material discharge pipe 4.

[0075] This is conducive to the gradual falling of the alloy material, and the falling rate of the alloy material can be controlled by controlling whether the blockage blocks the material discharge port 51. The lower opening of the funnel 53 is the funnel opening with a smaller funnel diameter.

[0076] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0077] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0078] Although the embodiments of this application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of this application. The scope of this application is defined by the claims and their equivalents.

Claims

1. A vacuum chamber device, characterized in that: It includes a vacuum chamber, at least two material discharge channels, a transition pipe and multiple material discharge pipes, and a vacuum material discharge bin. The two ends of the on-off controllable material discharge channel are respectively connected to the vacuum chamber and one end of the corresponding transition pipe, the other end of the transition pipe is connected to one end of at least two material discharge pipes, and the other end of the material discharge pipe is correspondingly connected to a vacuum material discharge bin, and the vacuum material discharge bin is provided with a switch-controllable material discharge port.

2. The vacuum chamber device according to claim 1, characterized in that: The vacuum groove of the vacuum chamber is a cylindrical groove, one end of the feed discharge channel is connected to the side of the vacuum groove, and at least two feed discharge channels are equidistantly distributed along the circumference of the vacuum groove, and the diameter of the vacuum groove is 5 to 8 times the inner diameter of the feed discharge channel.

3. The vacuum chamber device according to claim 1, characterized in that: The two ends of the feed pipe are respectively an inlet end connected to the vacuum feed bin and a transition end connected to the transition pipe. The diameter of the feed pipe increases from the inlet end to the transition end.

4. The vacuum chamber device according to any one of claims 1 to 3, characterized in that: There is an angle between the axes of at least two of the feed pipes connected to the same transition pipe.

5. The vacuum chamber device according to any one of claims 1 to 3, characterized in that: The transition pipe comprises: A tube body, one end of which is coaxially supported on the feeding channel; A sleeve, fixedly sleeved on the tube body; At least two telescopic cylinders are spaced around the tube body, one end of which is fixedly connected to the sleeve and the other end of which is abutted against the feeding channel.

6. The vacuum chamber device according to claim 5, characterized in that: The tube body comprises a first section and a second section with an included angle between their axes.

7. The vacuum chamber device according to any one of claims 1 to 3, characterized in that: The inner peripheral wall of the transition pipe is provided with a high temperature resistant coating.

8. The vacuum chamber device according to any one of claims 1 to 3, characterized in that: The feeding channel comprises: A connecting section, one end of which is in communication with the vacuum chamber, and an inner peripheral wall of the connecting section is provided with a high-temperature resistant material layer; The supporting section has two ends respectively connected with the connecting section and the transition pipe, and an angle is formed between the supporting section and the connecting section.

9. The vacuum chamber device according to claim 8, characterized in that: The support section is provided with a coolant through hole spaced apart from the inner hole thereof.

10. The vacuum chamber device according to any one of claims 1 to 3, characterized in that: The vacuum lower silo comprises: A vacuum chamber body, connected to the feeding pipe; A funnel, the lower opening of which is inserted into the vacuum chamber body and configured as the discharge opening: Blocking, used to block the feeding port; The conical cylinder has an end with a smaller diameter connected to the lower opening and an end with a larger diameter facing the lower feeding pipe.

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