Material control valve and vertical furnace discharge system

Abstract

The present application relates to bulk material conveying control valve technical field, a kind of material control valve and shaft furnace discharge system.The material control valve includes valve body, at least two valve plates, drive mechanism and at least two rotating shafts;Valve body is provided with discharge port;Valve plate is arranged in valve body;Drive mechanism is arranged outside valve body;Rotating shaft is rotatably installed on valve body, is connected with drive mechanism and corresponding valve plate and can drive valve plate rotation;When drive mechanism drives each rotating shaft rotation, it can drive each valve plate relative to the center of discharge port synchronous movement;Rotating shaft is equipped with first cooling structure for cooling rotating shaft.There are beneficial effects, including: drive mechanism is by driving rotating shaft rotation to make each valve plate synchronous movement to adjust the opening size of material passage at discharge port, realize center discharge, simple structure, less space occupation;Drive mechanism is arranged outside valve body and directly drives valve plate by being provided with the rotating shaft of first cooling structure, there is no excess transmission mechanism in valve body, it is conducive to adapt to high temperature working condition.

Description

Technical Field

[0001] This invention relates to the field of bulk material conveying control valve technology, and in particular to a material control valve and a vertical furnace discharge system. Background Technology

[0002] In material handling processes across numerous industries such as metallurgy, cement, and mining, valves are frequently used to control material flow to meet production process requirements. Currently, the most commonly used control valves on the market are gate valves, flap valves, and jaw valves. Gate valves are low in height but have excessively large length dimensions and are unsuitable for quantitative flow control, failing to achieve center-mounted material feeding. Flap valves are relatively high and cannot quantitatively control flow. Jaw valves are also quite tall. These three types of valves either cannot achieve center-mounted material feeding or have significant height and space requirements, making them difficult to meet current production needs.

[0003] Furthermore, with the upgrading of production processes, some production lines not only require material control valves to be able to adjust and quantitatively control material flow online, but also, because the temperature of the material flowing through the control valves is relatively high, the control valves also need to be able to adapt to high-temperature operating conditions. For example, the direct reduction shaft furnace hot discharge system in the metallurgical industry urgently needs a valve that meets the above requirements. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a material control valve and a vertical furnace discharge system to solve the problems of material control valves in the prior art being difficult to adapt to high-temperature conditions and occupying a large space.

[0005] To achieve the above and other related objectives, the present invention provides a material control valve, comprising: The valve body is provided with a discharge port for material to pass through; At least two valve plates are disposed in the cavity of the valve body and are centrally symmetrically distributed around the center of the discharge port; A drive mechanism is disposed outside the valve body; and At least two rotating shafts are rotatably mounted on the valve body along their own axes. Each rotating shaft is connected to a valve plate and can drive the valve plate to rotate. Each rotating shaft has a first connecting part located inside the valve body and connected to the corresponding valve plate, and a second connecting part located outside the valve body and connected to the drive mechanism. When the drive mechanism drives each of the rotating shafts to rotate, it can drive each of the valve plates to move synchronously relative to the center of the discharge port, so as to adjust the opening size of the material channel at the discharge port. The rotating shaft is provided with a first cooling structure for cooling the rotating shaft.

[0006] Optionally, the valve plate is connected to the first connecting part via a support arm and rotates synchronously with the support arm and the rotating shaft.

[0007] Optionally, the rotating shaft includes an inner tube and an outer tube. The inner tube is provided with a first flow channel and a first cooling outlet communicating with the first flow channel. One end of the inner tube extends into the outer tube, and the gap between the outer wall of the inner tube and the inner wall of the outer tube forms a first cooling cavity. The outer tube is provided with a first cooling inlet communicating with the first cooling cavity. The first cooling cavity and the first flow channel communicate to form the first cooling structure.

[0008] Optionally, the outer tube is closed at both ends, and the inner tube has an opening at one end that extends into the outer tube to connect the first flow channel with the first cooling chamber.

[0009] Optionally, a bearing housing is installed on the valve body, a portion of which extends into the valve body. The rotating shaft is mounted on the bearing housing via a bearing, and the bearing housing is provided with a second cooling structure and / or a purging air passage.

[0010] Optionally, the bearing housing is provided with a second cooling cavity constituting the second cooling structure along its circumference, and the bearing housing is also provided with a second cooling inlet and a second cooling outlet communicating with the second cooling cavity.

[0011] Optionally, an end cap is installed at one end of the bearing housing that extends into the valve body. A sealing element is provided between the shaft located between the bearing and the end cap and the bearing housing. The sealing element is pressed by the end cap. An annular air groove is provided on the end cap along its circumference. An air passage is provided on the bearing housing that communicates with the annular air groove and forms the purging air passage. When gas is purged into the annular air groove through the air passage, the gap between the shaft and the end cap can be sealed.

[0012] Optionally, the drive mechanism corresponds one-to-one with the rotating shaft, and the drive mechanism includes a drive component, which is connected to the corresponding rotating shaft through a drive arm or gear assembly.

[0013] Optionally, the gear assembly includes a first gear and a second gear that mesh with each other, the output end of the drive unit is connected to the first gear, and the second gear is mounted on the rotating shaft.

[0014] Optionally, the same drive mechanism is connected to the two rotating shafts via a linkage assembly, and can drive the two rotating shafts to rotate synchronously so as to drive the two valve plates to move synchronously.

[0015] Optionally, the inner wall of the valve body is lined with a heat-resistant lining.

[0016] Optionally, the valve body has a third cooling structure inside the valve wall.

[0017] Optionally, the valve body includes an upper valve body and a lower valve body, which are detachably connected and form the chamber when the connection is closed. The upper valve body is provided with a discharge throat, and the discharge port is provided on the discharge throat. The lower valve body is provided with a discharge port corresponding to the discharge port.

[0018] Optionally, there are two valve plates, including a first valve plate and a second valve plate. The center line connecting the two rotating shafts passes through the center of the discharge port. The angle formed by the discharge edge of the first valve plate and the center line is α, and the angle formed by the discharge edge of the second valve plate and the center line is β. The α and β are equal.

[0019] To achieve the above and other related objectives, this application also provides a vertical shaft furnace discharge system, including the material control valve described above.

[0020] As described above, the material control valve and vertical furnace discharge system of the present invention have at least the following beneficial effects: the drive mechanism drives the rotating shaft to rotate, thereby realizing the synchronous movement of each valve plate to adjust the opening size of the material channel at the discharge port. This not only enables central discharge and material flow regulation, but also has a simple structure and occupies little space. In addition, the drive mechanism is located outside the valve body and directly drives the valve plate inside the valve body through the rotating shaft. There are no extra transmission mechanisms in the valve body cavity, and the rotating shaft is equipped with a first cooling structure, which reduces the damage of high-temperature materials to the material control valve and is conducive to adapting to high-temperature working conditions. Attached Figure Description

[0021] Figure 1 The image shown is a cross-sectional view of a material control valve according to a first embodiment of the present invention. Figure 2 Displayed as Figure 1 Schematic diagram of the structure of the pivot shaft and bearing housing; Figure 3 Displayed as Figure 1 Top view of the material control valve; Figure 4 Displayed as Figure 1 A schematic diagram of the structure of the middle and lower feed inlets when they are closed; Figure 5 Displayed as Figure 1 A schematic diagram of the structure of the feed inlet / outlet during the opening and closing process; Figure 6 Displayed as Figure 1 A schematic diagram of the structure when the feed inlet and outlet are fully open; Figure 7 The image shown is a top view of Embodiment 2 of the material control valve of the present invention; Figure 8The image shown is a cross-sectional view of a third embodiment of the material control valve of the present invention.

[0022] Part Number Explanation Upper valve body 101, first inner liner 1011, third cooling chamber 1012, fourth cooling chamber 1013, fifth cooling chamber 1015, third cooling inlet 1016, third cooling outlet 1017, fourth cooling inlet 1018, fourth cooling outlet 1019, lower valve body 102, second inner liner 1021, sixth cooling chamber 1022, seventh cooling chamber 1023, fifth cooling inlet 1024, fifth cooling outlet 1025, discharge port 1026, first through hole 103, second through hole 104, chamber 105, discharge throat 200, discharge port 201, valve plate 300, through cover 401, bearing seat 402, second cooling chamber 4021, second cooling inlet 4021. 22, Second cooling outlet 4023, Air passage 4024, Air inlet 4025, First bearing 403, Spacer 404, Second bearing 405, Seal 406, End cap 407, Annular air groove 4071, Rotating shaft 501, Outer tube 5011, Inner tube 5012, First cooling inlet 5013, First cooling outlet 5014, First cooling chamber 5015, First flow channel 5016, Support arm 502, Drive component 601, Drive arm 602, First gear 603, Second gear 604, First connecting rod 605, Second connecting rod 606, Third connecting rod 607, Pin 608, Base 609, Bracket 6010, First bolt pair 701, Second bolt pair 702. Detailed Implementation

[0023] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0024] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show components relevant to the present invention and are not drawn according to the actual number, shape, and size of components in implementation. In actual implementation, the form, quantity, and proportion of each component can be arbitrarily changed, and the component layout may be more complex. The structures, proportions, sizes, etc., depicted in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of the present invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives of the present invention, should still fall within the scope of the technical content disclosed in the present invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are only for clarity of description and are not intended to limit the scope of the present invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the present invention.

[0025] Before describing the embodiments of the present invention in detail, the application environment of the present invention will be described first. The technology of the present invention is mainly applied to the conveying of high-temperature materials, for controlling the material flow rate, especially for the discharge of high-temperature sponge iron after reduction in a direct reduction shaft furnace. The temperature of the material is generally above 200°C, which is very high. Traditional material control valves are difficult to operate normally continuously under high-temperature conditions. The present invention is used to solve the problems of traditional material control valves occupying a large space and being difficult to adapt to high-temperature conditions.

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. However, it should be understood that this application is not limited to the following embodiments.

[0027] Example 1: See Figures 1 to 6This application provides a material control valve, comprising a valve body, a drive mechanism, at least two rotating shafts 501, and at least two valve plates 300. The valve body has a discharge port 201 for material passage; each valve plate 300 is disposed within a chamber 105 of the valve body and is centrally symmetrically distributed around the center of the discharge port 201; the drive mechanism is disposed outside the valve body; each rotating shaft 501 is rotatably mounted on the valve body along its own axis, and each rotating shaft 501 is connected to a corresponding valve plate 300 and can drive the valve plate 300 to rotate, meaning that the number of rotating shafts 501 and valve plates 300 are equal and are arranged in a one-to-one correspondence; each rotating shaft 501 has a first connecting portion located inside the valve body and a second connecting portion located outside the valve body, the first connecting portion being connected to the corresponding valve plate 300, and the second connecting portion being connected to the drive mechanism. When the drive mechanism drives each rotating shaft 501 to rotate, it can drive each valve plate 300 to move synchronously relative to the center of the discharge port 201, thereby adjusting the opening size of the material channel at the discharge port 201 and thus regulating the material flow rate. The rotating shaft 501 is provided with a first cooling structure for cooling the rotating shaft 501. The drive mechanism is located outside the valve body and directly drives the valve plate 300 inside the valve body through the rotating shaft. There are no extra transmission mechanisms in the valve body chamber 105, which is beneficial for adapting to high-temperature working conditions.

[0028] Optionally, the valve body includes an upper valve body 101 and a lower valve body 102. The upper valve body 101 and the lower valve body 102 are detachably connected and form a chamber 105 when the connection cover is closed. The detachable connection between the upper valve body 101 and the lower valve body 102 facilitates the installation of the valve plate 300 and the rotating shaft 501 before connecting the upper valve body 101 and the lower valve body 102 together, reducing the installation difficulty of the valve plate 300 and the rotating shaft 501. The upper valve body 101 and the lower valve body 102 can be connected by a second bolt pair 702, which is convenient for disassembly and assembly. The upper valve body 101 and the lower valve body 102 are connected and closed to form a chamber 105, which can provide movement space for components such as the valve plate 300 and the rotating shaft 501. The upper valve body 101 is provided with a discharge throat 200. The discharge throat 200 and the upper valve body 101 can be an integral structure; or, the discharge throat 200 and the upper valve body 101 can be separate structures and fixedly installed on the upper valve body 101. Part of the discharge throat 200 extends into the chamber 105. The discharge port 201 is located at the part of the discharge throat 200 that extends into the chamber 105. The lower valve body 102 is provided with a discharge port 1026 corresponding to the discharge port 201. When the drive mechanism drives the valve plate 300 to move and open the discharge port 201, the material enters from the discharge port 201, passes through the chamber 105, and is discharged from the discharge port 1026. When the drive mechanism drives the valve plate 300 to move and close the discharge port 201, the valve plate 300 blocks the discharge port 201 and prevents the material from falling. By setting a valve plate 300 corresponding to the discharge port 201 below the discharge port 201, and the valve plate 300 being able to rotate around the rotating shaft 501 in the horizontal direction to open and close the discharge port 201, the height space occupied is small, effectively reducing the overall height of the material control valve. The reduction in the overall height of the material control valve allows the steel structure of the platform on which the material control valve is installed to also be lowered, reducing investment costs.

[0029] Optionally, the rotating shaft 501 is correspondingly arranged with the valve plate 300, meaning that each valve plate 300 is equipped with one rotating shaft 501. The number of valve plates 300 and rotating shafts 501 can be set according to requirements. Further, there are two rotating shafts 501 and two valve plates 300. The two rotating shafts 501 are symmetrically arranged at the center of the feed inlet 201. The two valve plates 300 include a first valve plate and a second valve plate. The line connecting the centers of the two rotating shafts 501 passes through the center of the feed inlet 201. The angle formed by the discharge edge of the first valve plate and the line connecting the centers is α, and the angle formed by the discharge edge of the second valve plate and the line connecting the centers is β. α and β are equal, meaning that the discharge edges of the first and second valve plates are always parallel, ensuring that the first and second valve plates are always symmetrically opened. This guarantees that the material can be discharged from the center of the feed inlet 201, and the flow rate of the material can be controlled by adjusting the opening angle. In this application, the line connecting the center of the discharge port 201 and the center of the valve body is parallel to the axis of the rotating shaft 501. By setting two symmetrical valve plates 300 that can move synchronously, on the one hand, the valve plates 300 can always be opened symmetrically, allowing material to be discharged from the center; on the other hand, the flow rate can be quantitatively controlled by controlling the opening of the valve plates 300. Furthermore, the valve body size can be effectively reduced by opening the two valve plates 300 separately.

[0030] Optionally, the rotating shaft 501 is rotatably mounted on the upper valve body 101 along its own axis. The valve plate 300 is connected to the first connecting part through the support arm 502 and rotates synchronously with the support arm 502 and the rotating shaft 501. During the rotation of the rotating shaft 501, it can drive the valve plate 300 and the support arm 502 to rotate synchronously around the axis of the rotating shaft 501. Specifically, one end of the support arm 502 is fixedly connected to the rotating shaft 501, and the other end of the support arm 502 is fixedly connected to the valve plate 300 through the first bolt pair 701. That is to say, the support arm 502 will not have relative movement with the valve plate 300 and the rotating shaft 501, so that when the rotating shaft 501 rotates, it can drive the valve plate 300 and the support arm 502 to rotate together around the axis of the rotating shaft 501.

[0031] Optionally, the drive mechanism corresponds one-to-one with the rotating shaft 501, meaning each rotating shaft 501 corresponds to one drive mechanism. Each drive mechanism includes a drive element 601, which is connected to the corresponding rotating shaft 501 via a drive arm 602. The drive arm 602 is connected to the output end of the drive element 601 via a pin 608. When the drive element 601 is connected to the corresponding rotating shaft 501 via the drive arm 602, one end of the drive element 601 is hinged to a base 609 mounted on the valve body, and the other end of the drive element 601 is hinged to one end of the drive arm 602. The other end of the drive arm 602 is fixed to the rotating shaft 501, allowing the drive element 601 to drive the rotating shaft 501 to rotate via the drive arm 602. This ensures that the valve plate 300, support arm 502, and rotating shaft 501 rotate together, always centering their rotation on the axis of the rotating shaft 501. The drive element 601 can be a hydraulic cylinder, electric cylinder, or electro-hydraulic cylinder, etc. The drive structure is simple, reliable, and easy to maintain.

[0032] Optionally, the rotating shaft 501 includes an inner tube 5012 and an outer tube 5011. The inner tube 5012 is provided with a first flow channel 5016 and a first cooling outlet 5014 communicating with the first flow channel 5016. One end of the inner tube 5012 extends into the outer tube 5011, and the gap between the outer wall of the inner tube 5012 and the inner wall of the outer tube 5011 forms a first cooling cavity 5015. The outer tube 5011 is provided with a first cooling inlet 5013 communicating with the first cooling cavity 5015. The first cooling cavity 5015 and the first flow channel 5016 communicate to form a first cooling structure. Furthermore, the outer tube 5011 is closed at both ends, and the inner tube 5012, which extends into the outer tube 5011, has an opening at one end that connects the first flow channel 5016 and the first cooling chamber 5015. The inner tube 5012 and the outer tube 5011 can be coaxially arranged, with the upper end of the inner tube 5012 located outside the outer tube 5011. The first cooling outlet 5014 is located at the part of the inner tube 5012 outside the outer tube 5011, and the lower end of the inner tube 5012 extends into the outer tube 5011 from the top end of the outer tube 5011. A gap is left between the lower end of the inner tube 5012 and the bottom of the outer tube 5011 so that the cooling medium in the first cooling chamber 5015 can enter the first flow channel 5016 through the gap and opening. The first cooling inlet 5013 is located on the side wall of the part of the outer tube 5011 located outside the valve body. Both the first cooling inlet 5013 and the first cooling outlet 5014 are located outside the valve body, which facilitates the input and output of the cooling medium and also avoids the impact of high temperature conditions on the operation of the cooling medium supply equipment. Part of the rotating shaft 501 is located inside the valve body so that it can be directly or indirectly connected to the valve plate 300 to drive the valve plate 300 to move. The first cooling structure on the rotating shaft 501 can effectively reduce the temperature of the rotating shaft 501, avoid damage to the rotating shaft 501 caused by excessively high material temperature passing through the valve body, and extend the service life of the material control valve.

[0033] Optionally, a bearing housing 402 is mounted on the valve body, with a portion of the bearing housing 402 extending into the valve body. The rotating shaft 501 is mounted on the bearing housing 402 via a bearing, and the bearing housing 402 is provided with a second cooling structure and / or a purging air passage. This design features a compact layout and can adapt to high-temperature operating conditions. Specifically, the bearing housing 402 can be mounted on the upper valve body 101, with its upper end located outside the valve body and its lower end located inside the chamber 105. Further, there can be two bearings, including a first bearing 403 and a second bearing 405, separated by a spacer 404.

[0034] Optionally, the bearing housing 402 is provided with a second cooling cavity 4021 constituting a second cooling structure along its circumference. The bearing housing 402 is also provided with a second cooling inlet 4022 and a second cooling outlet 4023 communicating with the second cooling cavity 4021. The second cooling inlet 4022 and the second cooling outlet 4023 are both located on the part of the bearing housing 402 located outside the valve body. The cooling medium enters the second cooling cavity 4021 from the second cooling inlet 4022 to cool the bearing housing 402 and flows out from the second cooling outlet 4023. Furthermore, the second cooling chamber 4021 includes a channel portion near the upper end of the bearing housing 402 and a cavity portion near the lower end of the bearing housing 402. Specifically, the channel portion can be located on the part of the bearing housing 402 located outside the valve body, and the cavity portion can be located on the part of the bearing housing 402 located in the chamber 105. The radial width of the cavity portion along the bearing housing 402 is greater than the radial width of the channel portion along the bearing housing 402. This structural design can ensure both the capacity of the lower end of the bearing housing 402 to accommodate the cooling medium, that is, to ensure the cooling effect of the part of the bearing housing 402 located in the chamber 105 of the valve body, and the structural strength of the bearing housing 402.

[0035] Optionally, an end cap 407 is installed at one end of the bearing housing 402 that extends into the valve body. A seal 406 is provided between the shaft 501 located between the bearing and the end cap 407 and the bearing housing 402. That is, the seal 406 is located between the bearing and the end cap 407, which can improve the stability of the structure and prevent materials, dust and other impurities from entering through the gap between the bearing housing 402 and the shaft 501 and affecting the bearing. The seal 406 can be a sealing ring or a sealing gasket, etc. The seal 406 is pressed by the end cap 407, which is installed at the lower end of the bearing housing 402. A through cover 401 is installed at the upper end of the bearing housing 402, and the upper end of the shaft 501 extends out of the bearing housing 402 through the through cover 401. The end cap 407 has an annular air groove 4071 along its circumference, and the bearing housing 402 has an air passage 4024 that forms a purging air path with the annular air groove 4071. When gas is purged into the annular air groove 4071 through the air passage 4024, the gap between the rotating shaft 501 and the end cap 407 can be sealed, thereby forming an air seal. This prevents materials, dust and other impurities in the chamber 105 from entering the bearing housing 402 through the gap between the rotating shaft 501 and the end cap 407. The bearing housing 402 has an air inlet 4025 that communicates with the air passage 4024 on the part of the bearing housing outside the valve body. External cooling gas enters from the air inlet 4025, flows through the air passage 4024 and is discharged into the chamber 105 of the valve body through the annular air groove 4071. This can prevent materials in the chamber 105 from entering the bearing housing 402 and affecting the operation and service life of the components installed in the bearing housing 402, and can further cool the bearing housing 402. Furthermore, the annular air groove includes large-diameter sections disposed on the outer and inner side walls of the end cover 407, and the two large-diameter sections are connected by a small-diameter section. This structural design is beneficial to changing the flow rate of the cooling gas in order to form a more impactful airflow, thereby effectively preventing materials or dust from entering through the gap between the end cover 407 and the rotating shaft 501, and improving the reliability of the air seal.

[0036] Optionally, the inner wall of the valve body is lined with a heat-resistant liner, which can be made of heat-resistant material to improve the heat resistance of the valve body and reduce damage to the valve body caused by high-temperature materials. Further, the heat-resistant liner includes a first liner layer 1011 covering the inner wall of the upper valve body 101 and a second liner layer 1021 covering the inner wall of the lower valve body 102.

[0037] Optionally, a third cooling structure is provided inside the valve wall of the valve body. Further, the third cooling structure includes a third cooling chamber 1012, a fourth cooling chamber 1013, a fifth cooling chamber 1015, a sixth cooling chamber 1022, and a seventh cooling chamber 1023; wherein, the third cooling chamber 1012 and the fourth cooling chamber 1013 are located on the upper part of the upper valve body 101, the third cooling chamber 1012 is arranged circumferentially along the upper valve body 101 and is vertically arranged, and the fourth cooling chamber 1013 is arranged circumferentially along the upper valve body 101 and is horizontally arranged. The upper valve body 1011 and the third cooling chamber 1012 are connected by a plurality of first through holes 103 arranged circumferentially along the upper valve body 101. The upper valve body 101 is provided with a third cooling inlet 1016 communicating with the third cooling chamber 1012 and a third cooling outlet 1017 communicating with the fourth cooling chamber 1013. The cooling medium enters from the third cooling inlet 1016, passes through the third cooling chamber 1012, the first through holes 103 and the fourth cooling chamber 1013 in sequence, and is discharged from the third cooling outlet 1017. The fifth cooling chamber 1015 is located at the lower part of the upper valve body 101. The fifth cooling chamber 1015 is arranged circumferentially along the upper valve body 101 and is vertically set. The upper valve body 101 is provided with a fourth cooling inlet 1018 and a fourth cooling outlet 1019 communicating with the fifth cooling chamber 1015. The cooling medium enters from the fourth cooling inlet 1018, passes through the fifth cooling chamber 1015 and is discharged from the fourth cooling outlet 1019. The sixth cooling chamber 1022 and the seventh cooling chamber 1023 are disposed on the lower valve body 102. The sixth cooling chamber 1022 is arranged vertically along the circumference of the lower valve body 102, and the seventh cooling chamber 1023 is arranged horizontally along the circumference of the lower valve body 102. The sixth cooling chamber 1022 and the seventh cooling chamber 1023 are connected by a plurality of second through holes 104 arranged along the circumference of the lower valve body 102. The lower valve body 102 is provided with a fifth cooling inlet 1024 communicating with the sixth cooling chamber 1022 and a fifth cooling outlet 1025 communicating with the seventh cooling chamber 1023. The cooling medium enters from the fifth cooling inlet 1024, passes through the sixth cooling chamber 1022, the second through holes 104 and the seventh cooling chamber 1023 in sequence, and is discharged from the fifth cooling outlet 1025. By setting a third cooling structure on the valve body, the cooling performance of the valve body is further improved, avoiding excessively high valve body temperature, and enabling the valve body to adapt to high-temperature operating environments.

[0038] In the material control valve described above, the rotating shaft 501 and the bearing housing 402 are located within the valve body. The rotating shaft 501 is connected to the valve plate 300 via the support arm 502 and can rotate to drive the valve plate 300 to translate. This reduces the installation space required in both the vertical and horizontal directions, and also reduces the space required for the valve plate 300 to move in both the vertical and horizontal directions. Furthermore, there are no moving parts requiring lubrication within the valve body chamber 105. The support arm 502, located inside the valve body, has lower positional accuracy requirements and can be made of high-temperature resistant materials, making it less prone to deformation due to high temperatures and thus adaptable to high-temperature conditions. The rotating shaft 501 and bearing housing 402, which require higher positional accuracy, are cooled by a first cooling structure and a second cooling structure to ensure they can withstand high-temperature conditions. Moreover, the material control valve in this embodiment has a simple and reliable structure, is easy to maintain, and effectively reduces investment and production costs.

[0039] Example 2: See Figure 8 The difference from Embodiment 1 is that the driving component 601 is connected to the corresponding rotating shaft 501 via a gear assembly. When the driving component 601 is connected to the corresponding rotating shaft 501 via the gear assembly, the gear assembly includes a meshing first gear 603 and a second gear 604. The driving component 601 can be mounted on the upper valve body 101 via a bracket 6010. The output end of the driving component 601 is connected to the first gear 603, which is mounted on the rotating shaft 501. When the first gear 603 meshes with the second gear 604, it can drive the rotating shaft 501 to rotate. The driving component 601 can be a geared motor or a hydraulic motor, etc.

[0040] In addition to having the advantages of the material control valve in Embodiment 1, the material control valve in the above embodiment has a smooth and reliable operation due to the coordinated transmission of the first gear 603 and the second gear 604, which further improves the reliability of the material control valve.

[0041] Example 3: See Figure 1 , Figure 7 and Figure 8 The difference from Embodiment 1 is that the same drive mechanism is connected to two rotating shafts 501 through a linkage assembly, and can drive the two rotating shafts 501 to rotate synchronously so as to drive the two valve plates 300 to move synchronously.

[0042] Optionally, the number of drive mechanisms is one.

[0043] Optionally, the linkage assembly includes a first link 605, a second link 606, and a third link 607. The drive arm 602 is fixedly connected to one of the rotating shafts 501. The first end of the first link 605 is fixedly connected to the rotating shaft 501 fixed to the drive arm 602. The first end of the third link 607 is fixedly connected to the other rotating shaft 501. The two ends of the second link 606 are hinged to the second ends of the first link 605 and the third link 607, respectively. The first link 605 and the third link 607 are parallel and of equal length. Rotation of the rotating shaft 501 connected to the drive arm 602 drives the first link 605 to rotate. Rotation of the first link 605 drives the third link 607 to rotate via the second link 606. Rotation of the third link 607 drives the other rotating shaft 501 to rotate. This allows the two valve plates 300 to move synchronously closer together or synchronously further apart, and the two valve plates 300 are always centrally symmetrical about the center of the feed inlet 201.

[0044] It is understood that the drive arm 602 can also be replaced by the gear assembly in Embodiment 2, and the gear assembly and the connecting rod assembly work together to enable one drive 601 to drive two rotating shafts 501 at the same time.

[0045] The material control valve of the above embodiment, in addition to having the advantages of Embodiment 1, also reduces the number of drive components 601, further simplifies the structure and reduces costs.

[0046] In the above embodiments, the working principle of Embodiment 1 and Embodiment 2 is the same. Specifically, when it is necessary to stop the material, the two valve plates 300 move closer together to close the material control valve, and the material is stopped at the discharge throat 200. When it is necessary for the material to fall, the two drive mechanisms act synchronously, and the two valve plates 300 move away synchronously to open the material control valve. During the opening process, the discharge edges of the two valve plates 300 are always parallel, ensuring that the material is discharged along the center. By controlling the size of angles α and β, the material discharge flow rate can be quantitatively adjusted. When the material discharge is completed, the material control valve is controlled to the fully open state to clean up the material remaining on the valve plates 300, and then the material control valve is completely closed to wait for the next working process. The working principle of Embodiment 3 differs from Embodiment 1 in that when it is necessary for the material to fall, the drive component 601 acts directly according to the command. Under the action of the linkage assembly, the two valve plates 300 will move synchronously, without the need for electrical control of the two drive components 601 to act synchronously separately.

[0047] See Figures 1 to 8 In some alternative embodiments, this application also provides a vertical shaft furnace discharge system, including the material control valve as described in any of the above embodiments.

[0048] Optionally, the material inlet of the vertical furnace discharge system corresponds to the material outlet of the vertical furnace, receiving the material discharged from the material outlet of the vertical furnace. The material control valve can be installed at the material outlet of the vertical furnace discharge system, at the material inlet of the vertical furnace discharge system, or at the conveying channel between the material outlet and the material inlet of the vertical furnace discharge system, so as to realize the flow control of high-temperature materials.

[0049] The material control valve and vertical furnace discharge system of the present invention have a simple structural design, are reliable, easy to maintain, reduce space occupation, and can realize the control of central feeding and material flow, thereby reducing costs. In addition, it can adapt to high temperature conditions, expand the scope of application, and meet the production process requirements of high temperature materials.

[0050] In the description of this specification, the references to terms such as "this embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A material control valve, characterized in that, include: The valve body is provided with a discharge port for material to pass through, and the valve body includes an upper valve body and a lower valve body; At least two valve plates are disposed in the cavity of the valve body and are centrally symmetrically distributed with respect to the center of the discharge port; A drive mechanism is disposed outside the valve body; and At least two rotating shafts are rotatably mounted on the valve body along their own axes. Each rotating shaft is connected to a valve plate and can drive the valve plate to rotate. Each rotating shaft has a first connecting part located inside the valve body and connected to the corresponding valve plate, and a second connecting part located outside the valve body and connected to the drive mechanism. When the drive mechanism drives each of the rotating shafts to rotate, it can drive each of the valve plates to rotate in the horizontal direction and move synchronously relative to the center of the discharge port, so as to adjust the opening size of the material channel at the discharge port. The rotating shaft is provided with a first cooling structure for cooling the rotating shaft; The valve body has a third cooling structure inside its valve wall. The third cooling structure includes a third cooling chamber, a fourth cooling chamber, and a fifth cooling chamber disposed in the upper valve body, and a sixth cooling chamber and a seventh cooling chamber disposed in the lower valve body. The third cooling chamber and the fourth cooling chamber are connected through a first through hole, and the sixth cooling chamber and the seventh cooling chamber are connected through a second through hole. Each cooling chamber is arranged circumferentially along the valve body and the valve body is cooled by the cooling medium flowing inside. A bearing housing is mounted on the valve body, with a portion of the bearing housing extending into the valve body. The rotating shaft is mounted on the bearing housing via a bearing, and the bearing housing is provided with a second cooling structure and / or a purge air passage. The bearing housing has a second cooling cavity forming the second cooling structure along its circumference, and the bearing housing also has a second cooling inlet and a second cooling outlet communicating with the second cooling cavity. An end cap is mounted on one end of the bearing housing extending into the valve body. A sealing element is provided between the rotating shaft located between the bearing and the end cap and the bearing housing. The sealing element is pressed by the end cap. The end cap has an annular air groove along its circumference. The bearing housing has an air passage communicating with the annular air groove and forming the purge air passage. When purge gas is blown into the annular air groove through the air passage, the gap between the rotating shaft and the end cap can be sealed. The end cap is provided with an annular air groove along its circumference, and the bearing seat is provided with an air passage that forms a purging air path with the annular air groove. When gas is purged into the annular air groove through the air passage, the gap between the rotating shaft and the end cap can be sealed. The annular air groove includes a large-diameter section provided on the outer side wall and the inner side wall of the end cap, and the two large-diameter sections are connected by a small-diameter section.

2. The material control valve according to claim 1, characterized in that: The valve plate is connected to the first connecting part via a support arm and rotates synchronously with the support arm and the rotating shaft.

3. The material control valve according to claim 1, characterized in that: The rotating shaft includes an inner tube and an outer tube. The inner tube is provided with a first flow channel and a first cooling outlet communicating with the first flow channel. One end of the inner tube extends into the outer tube, and the gap between the outer wall of the inner tube and the inner wall of the outer tube forms a first cooling cavity. The outer tube is provided with a first cooling inlet communicating with the first cooling cavity. The first cooling cavity and the first flow channel communicate to form the first cooling structure.

4. The material control valve according to claim 3, characterized in that: The outer tube is closed at both ends, and the inner tube has an opening at one end that extends into the outer tube to connect the first flow channel with the first cooling chamber.

5. The material control valve according to any one of claims 1 to 4, characterized in that: The drive mechanism corresponds one-to-one with the rotating shaft. The drive mechanism includes a drive component, and the drive component is connected to the corresponding rotating shaft through a drive arm or gear assembly.

6. The material control valve according to claim 5, characterized in that: The gear assembly includes a first gear and a second gear that mesh with each other. The output end of the drive unit is connected to the first gear, and the second gear is mounted on the rotating shaft.

7. The material control valve according to any one of claims 1 to 4, characterized in that: The same drive mechanism is connected to the two rotating shafts via a linkage assembly, and can drive the two rotating shafts to rotate synchronously so as to drive the two valve plates to move synchronously.

8. The material control valve according to claim 1, characterized in that: The inner wall of the valve body is lined with a heat-resistant lining.

9. The material control valve according to claim 1 or 8, characterized in that: The upper valve body and the lower valve body are detachably connected and form the chamber when the connection is closed. The upper valve body is provided with a discharge throat, and the discharge port is provided on the discharge throat. The lower valve body is provided with a discharge port corresponding to the discharge port.

10. The material control valve according to any one of claims 1 to 4, characterized in that: The valve plates are of two types, including a first valve plate and a second valve plate. The center line connecting the two rotating shafts passes through the center of the discharge port. The angle formed by the discharge edge of the first valve plate and the center line is α, and the angle formed by the discharge edge of the second valve plate and the center line is β. The α and β are equal.

11. A vertical shaft furnace discharge system, characterized in that: Includes the material control valve as described in any one of claims 1 to 10.

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