Feeding valve for thermal sponge iron production
Through the upper and lower double valve structure and dry oil sealing technology, the airtightness problem caused by high-temperature material erosion is solved, and the safety and reaction efficiency of hot sponge iron production are improved.
Patent Information
- Application Number
- CN202422237108.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-11
AI Technical Summary
During the existing hot sponge iron production process, ordinary valves have poor airtightness under high-temperature materials, which affects production safety and reduction reaction effect.
Adopt the upper and lower double valve structure, the blanking valve adjusts the material flow, the switch valve provides airtightness, and reduces high-temperature material corrosion through dry oil sealing.
It improves the air tightness and production safety of the feed valve, ensures the smooth progress of the reduction reaction, and reduces the risk of valve erosion.
Smart Images
Figure CN223117407U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a feeding valve, in particular to a feeding valve for the production of hot sponge iron. Background Art
[0002] Sponge iron (DRI), also known as direct reduced iron, is mainly used to replace scrap steel in electric arc furnace steelmaking. In recent years, due to the shortage of scrap steel, the production scale of sponge iron has been increasing.
[0003] The production process of sponge iron is generally as follows: materials (iron ore particles) are allowed to fall into a pressure reaction vessel by their own gravity, and hot reaction gas flows upward into the pressure reaction vessel and reacts with the materials to be reduced to sponge iron. It can be found from actual implementation that ordinary valves are often used to connect the inlet of the pressure reaction vessel. This method has the following defects: after long-term use, high-temperature materials will erode the valve when passing through the valve, and the airtightness of the valve will become poor, which will have a certain impact on the subsequent reduction reaction and reduce the production safety, and improvement is needed. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a feeding valve for the production of hot sponge iron, which has guaranteed airtightness, can adjust the falling flow rate of materials, is beneficial to the smooth progress of the reduction reaction in the pressure reaction vessel, and is suitable for popularization.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A feeding valve for the production of hot sponge iron includes a connecting pipe. The top opening of the connecting pipe is connected with a blanking valve, and the bottom opening of the connecting pipe is connected with a switching valve. Among them: the blanking valve includes a blanking valve housing, a blanking pipe is installed in the blanking valve housing, and a blanking valve core is rotatably installed in the blanking valve housing via a blanking control member. The blanking valve core is used to open or close the outlet of the blanking valve under the control of the blanking control member; the switching valve includes a switching valve housing, a switching valve core is rotatably installed in the switching valve housing, a material passing port is formed through the switching valve core, and dry oil for providing airtightness is injected into the oil groove on the switching valve core. Among them, when the material passing port on the switching valve core rotates to be vertically opposite to the inlet and outlet of the switching valve core, the switching valve core opens.
[0007] The advantages of the utility model are:
[0008] The utility model adopts an upper and lower double-valve structure. The upper blanking valve can adjust the flow rate of materials (iron ore particles), and the lower switching valve can provide reliable airtightness. Moreover, the cooperation of the upper and lower double valves enables the materials to directly fall into the lower pressure reaction vessel, greatly reducing the erosion of the feeding valve of the utility model by high-temperature materials, ensuring airtightness, not affecting the subsequent reduction reaction, having high production safety, and being suitable for popularization. The opening and closing of the double valves of the utility model can adopt a manual control method or an electric control method implemented by any power actuator. The utility model is mainly used for the feeding operation of high-temperature materials in the production of sponge iron. Description of the Drawings
[0009] Figure 1 It is a schematic structural diagram of the feeding valve for the production of hot sponge iron of the utility model.
[0010] Figure 2 is Figure 1 the left view schematic diagram of
[0011] Figure 3 It is a three-dimensional schematic diagram of the switching valve core.
[0012] Figure 4 It is a three-dimensional perspective schematic diagram of the switching valve core. Detailed Embodiment
[0013] As Figures 1 to 4 shown, the feeding valve for the production of hot sponge iron of the utility model includes a connecting pipe 20. The top opening of the connecting pipe 20 is connected with a blanking valve 10 with adjustable flow rate, that is, the outlet 16 of the blanking valve 10 is connected with the top opening of the connecting pipe 20. The bottom opening of the connecting pipe 20 is connected with a switching valve 30 that provides airtightness, that is, the inlet 32 of the switching valve 30 is connected with the bottom opening of the connecting pipe 20. Among them: The blanking valve 10 includes a blanking valve housing 11. A blanking pipe 12 is installed inside the blanking valve housing 11. A blanking valve core 15 is rotatably installed inside the blanking valve housing 11 via a blanking control member 14. The blanking valve core 15 is used to open or close the outlet 16 of the blanking valve 10 under the control of the blanking control member 14. The switching valve 30 includes a switching valve housing 31. A switching valve core 60 is rotatably installed inside the switching valve housing 31. A material passage opening 66 is formed through the switching valve core 60. Dry oil for providing airtightness is injected into the oil groove on the switching valve core 60. That is, the switching valve core 60 realizes airtight sealing with the inner wall of the switching valve housing 31 through the dry oil. Among them, when the material passage opening 66 on the switching valve core 60 rotates to be vertically opposite to the inlet 32 and the outlet 33 of the switching valve core 60, the switching valve core 60 opens, otherwise it closes.
[0014] As Figure 1 shown, the inlet of the blanking pipe 12 is the inlet of the blanking valve 10, and the outlet of the blanking pipe 12 is located above the outlet 16 of the blanking valve 10. Among them, the outlet of the blanking pipe 12 is an inclined outlet 13 to reduce dust.
[0015] As shown in Figure 2 , the blanking control member 14 includes a rotating shaft 141. One end of the rotating shaft 141 is elastically mounted on the inner wall of the blanking valve housing 11 via a first spring 142, and the other end of the rotating shaft 141 passes through the blanking valve flange 40 installed outside the blanking valve housing 11. The part of the rotating shaft 141 passing through the blanking valve flange 40 is provided with a blanking control handle 143 or is connected to a blanking valve core rotation control device (not shown). Figure 2 (The manual control method is shown).
[0016] In practice, the blanking valve flange 40 mainly supports the rotating shaft 141 and the blanking valve core 15 mounted thereon. The first spring 142 functions as a high-temperature expansion compensation.
[0017] The blanking control handle 143 is used to manually control the flipping degree of the blanking valve core 15 through the rotating shaft 141, while the blanking valve core rotation control device is used to electrically control the flipping degree of the blanking valve core 15 through the rotating shaft 141. The two control methods of manual and electric can be determined according to actual needs. The blanking valve core rotation control device is a power actuator existing in the art and will not be elaborated here. Further, in order to facilitate the installation of the blanking control handle 143, the end of the rotating shaft 141 is preferably designed as a square head with a square cross-section (not shown).
[0018] As shown in Figure 1 and Figure 2 , the blanking valve core 15 is in an umbrella shape. Among them, by controlling the flipping of the blanking valve core 15 through the rotating shaft 141, the blanking valve core 15 can completely seal, completely open, or partially seal the outlet 16 of the blanking valve 10, so as to achieve the purpose of flow regulation.
[0019] As shown in Figure 2 , a baffle 41 is provided between the blanking valve flange 40 and the blanking pipe 12.
[0020] As shown in Figure 3 and Figure 4 , the switching valve core 60 includes a cylindrical core body 61. The shape of the switching valve housing 31 should be adapted to the shape of the core body 61. At both ends of the core body 61, that is, the inner end and the outer end, short end heads 611 and long end heads 612 are respectively provided, and a material feeding port 66 is opened on the core body 61 along the direction perpendicular to the axis of the core body 61.
[0021] Further, as shown in Figure 3 and Figure 4, the oil sump includes an oil inlet passage 681 arranged along the axis direction of the long end head 612. The oil inlet passage 681 is communicated with an oil distribution passage 682 arranged inside the outer end of the core body 61. The oil distribution passage 682 is communicated with an outer end annular groove 64 arranged near the outer end of the core body 61. A straight guide groove 63 is arranged on the side wall of the core body 61 along the axis direction of the core body 61. The outer end annular groove 64 is communicated with an inner end annular groove 69 arranged near the inner end of the core body 61 through the straight guide groove 63. As Figure 4 , the outer end annular groove 64 and the inner end annular groove 69 are outwardly open annular grooves.
[0022] As Figure 3 and Figure 4 , a plurality of oil distribution passages 682 are arranged at the outer end of the core body 61. All the oil distribution passages 682 are distributed in a divergent manner, that is, the inlets of the oil distribution passages 682 are connected to the outlet of the oil inlet passage 681, and the outlets of the oil distribution passages 682 are evenly distributed around the outlet of the oil inlet passage 681. Among them, an oil outlet notch 67 is also arranged on the outer end of the core body 61, and the oil outlet notch 67 is arranged staggeredly with the outlets of the oil distribution passages 682.
[0023] As Figure 3 and Figure 4 , a scraping oil groove 65 is also arranged on the side wall of the core body 61 along the axis direction of the core body 61. The scraping oil groove 65 is not communicated with the outer end annular groove 64 and the inner end annular groove 69. The function of the scraping oil groove 65 is to accommodate the injected excess dry oil, increase the contact area between the dry oil and the inner wall of the switch valve housing 31, so as to improve the airtightness.
[0024] In the present utility model, the dry oil provides sealing and lubricating functions for the surface of the switch valve core 60. When injecting, the dry oil enters from the oil inlet passage 681, then passes through the oil distribution passage 682, the outer end annular groove 64, the straight guide groove 63, and finally enters the inner end annular groove 69, so as to form an effective seal for the switch valve core 60. A small amount of excess dry oil will be discharged from the oil outlet notch 67.
[0025] During actual implementation, the oil inlet passage 681 is communicated with the outside. In addition, an oil injection port 34 may also be arranged on the switch valve housing 31.
[0026] As Figure 2 , the short end head 611 of the switch valve core 60 is elastically installed on the inner wall of the switch valve housing 31 through a second spring 80. The long end head 612 of the switch valve core 60 passes through the switch valve flange 70 installed on the switch valve housing 31, and the part of the long end head 612 of the switch valve core 60 protruding out of the switch valve flange 70 is installed with a switch control handle 50 or connected to a switch valve core rotation control device (not shown) ( Figure 2 the shown is a manual control method).
[0027] In practice, the switch valve flange 70 mainly serves to support the switch valve core 60. The second spring 80 serves to compensate for the high-temperature expansion of the switch valve core 60.
[0028] The switch control handle 50 is used to manually control the rotation degree of the switch valve core 60, while the switch valve core rotation control device is used to electrically control the rotation degree of the switch valve core 60. The two control methods of manual and electric can be determined according to actual needs. The switch valve core rotation control device is a power actuator existing in the art and will not be elaborated here.
[0029] Further, in order to facilitate the installation of the switch control handle 50, it is advisable that the end of the long end head 612 is designed as a square head 613 with a square cross-section.
[0030] The following takes the manual control method as an example to illustrate the use process of the present invention:
[0031] In the production of sponge iron, open the feed valve of the present invention to allow high-temperature materials (iron ore particles) to fall into the pressure reaction vessel. Specifically: First, rotate the switch valve core 60 through the switch control handle 50 (see the switch direction indicated by the solid arrow in Figure 1 ), so that its upper material outlet 66 is vertically opposite to the inlet 32 and the outlet 33 of the switch valve core 60, that is, open the switch valve 30. Then, flip the blanking valve core 15 through the blanking control handle 143 (see the switch direction indicated by the dashed arrow in Figure 1 ), so that the blanking valve core 15 leaves the outlet 16 of the blanking valve 10, that is, open the blanking valve 10 (as shown by the solid line in Figure 1 ). Thus, the material enters through the blanking valve 10, passes through the connecting pipe 20, and the switch valve 30 and falls into the pressure reaction vessel. While opening the blanking valve 10, the size of the opening between the blanking valve core 15 and the outlet 16 of the blanking valve 10 can be controlled to adjust the size of the falling material flow rate.
[0032] After the material falls into the pressure reaction vessel, close the feed valve of the present invention. Specifically: First, reversely flip the blanking valve core 15 through the blanking control handle 143 to make the blanking valve core 15 seal the outlet 16 of the blanking valve 10, that is, close the blanking valve 10 (as shown by the dashed line in Figure 1 ), so that the material no longer falls. Then, reversely rotate the switch valve core 60 through the switch control handle 50 to make its upper material outlet 66 not vertically opposite to the inlet 32 and the outlet 33 of the switch valve core 60, that is, close the switch valve 30, and the switch valve 30 provides effective airtightness.
[0033] As can be seen from the above, the utility model adopts an upper and lower double-valve structure. The upper blanking valve 10 can adjust the flow rate of the material (iron ore particles), and the lower switching valve 30 can provide reliable airtightness. The cooperation of these two valves enables the material to directly fall into the lower pressure reaction vessel (the material directly falls from the outlet 16 and the material passage port 66), greatly reducing the erosion of the switching valve 30 by the high-temperature material, ensuring the airtightness, ensuring that the reduction reaction in the pressure reaction vessel is not affected, and improving the production safety.
[0034] The above is the preferred embodiment of the utility model and the technical principles applied. For those skilled in the art, any obvious changes such as equivalent transformation and simple substitution based on the technical solution of the utility model without departing from the spirit and scope of the utility model shall fall within the protection scope of the utility model.
Claims
1. A feeding valve for hot sponge iron production, characterized in that It includes a connecting pipe, with a blanking valve connected to the top opening of the connecting pipe and a switching valve connected to the bottom opening of the connecting pipe. Among them: The blanking valve includes a blanking valve housing, a blanking pipe is installed inside the blanking valve housing, and a blanking valve core is rotatably installed inside the blanking valve housing via a blanking control member. The blanking valve core is used to open or close the outlet of the blanking valve under the control of the blanking control member; The switching valve includes a switching valve housing, a switching valve core is rotatably installed inside the switching valve housing, a material passage opening is provided through the switching valve core, and dry oil for providing airtightness is injected into the oil groove on the switching valve core. Among them, when the material passage opening on the switching valve core rotates to be vertically opposite to the inlet and outlet of the switching valve core, the switching valve core opens.
2. The feeding valve for producing hot sponge iron according to claim 1, wherein, The inlet of the blanking pipe is the inlet of the blanking valve, and the outlet of the blanking pipe is located above the outlet of the blanking valve. Among them, the outlet of the blanking pipe is an inclined outlet.
3. The feeding valve for producing hot sponge iron according to claim 2, characterized in that, The blanking control member includes a rotating shaft, one end of the rotating shaft is elastically installed on the inner wall of the blanking valve housing via a first spring, the other end of the rotating shaft penetrates through the blanking valve flange installed outside the blanking valve housing, and a blanking control handle is installed on the part of the rotating shaft passing through the blanking valve flange or is connected to a rotating control device of the blanking valve core.
4. The feeding valve for hot sponge iron production according to claim 3, characterized in that, The blanking valve core is in an umbrella shape. Among them, by controlling the flipping of the blanking valve core through the rotating shaft, the blanking valve core can completely seal, completely open, or partially seal the outlet of the blanking valve.
5. The feeding valve for producing hot sponge iron according to claim 3, characterized in that, A baffle plate is provided between the blanking valve flange and the blanking pipe.
6. The feeding valve for producing hot sponge iron according to claim 1, characterized in that, The switching valve core includes a cylindrical core body, with a short end head and a long end head respectively provided at the inner end and the outer end of the core body, and the material passage opening is provided in the core body along the direction perpendicular to the axis of the core body.
7. The feeding valve for producing hot sponge iron according to claim 6, characterized in that, The oil groove includes an oil inlet channel provided along the axis direction of the long end head, the oil inlet channel is communicated with a sub-oil channel provided inside the outer end of the core body, the sub-oil channel is communicated with an outer end annular groove provided near the outer end of the core body, a straight guide groove is provided on the side wall of the core body along the axis direction of the core body, and the outer end annular groove is communicated with an inner end annular groove provided near the inner end of the core body through the straight guide groove.
8. The feeding valve for producing hot sponge iron according to claim 7, characterized in that, A plurality of the sub-oil channels are provided at the outer end of the core body, and all the sub-oil channels are distributed in a divergent shape. Among them, an oil outlet notch is further provided on the outer end of the core body, and the oil outlet notch is arranged staggeredly with the outlet of the sub-oil channel.
9. The feeding valve for producing hot sponge iron according to claim 8, wherein A scraping oil groove is further provided on the side wall of the core body along the axis direction of the core body, and the scraping oil groove is not communicated with the outer end annular groove and the inner end annular groove.
10. The feeding valve for producing hot sponge iron according to claim 6, characterized in that, The short end head of the switching valve core is elastically installed on the inner wall of the switching valve housing via a second spring, the long end head of the switching valve core penetrates through the switching valve flange installed on the switching valve housing, and a switching control handle is installed on the part of the long end head of the switching valve core passing through the switching valve flange or is connected to a rotating control device of the switching valve core.