Vacuum dryer and its working method

Abstract

This invention belongs to the technical field of drying equipment, specifically relating to dryers, and more particularly to a vacuum dryer and its working method. One type of vacuum dryer includes: an air blowing adjustment mechanism located within the inner cavity of a hopper; an air supply pipe of the air path mechanism connected to a transfer chamber; a first opening on the outer wall of the transfer chamber; an arc-shaped plate fixed to the side wall of the adjusting component; a first guide plate fixed to the upper edge of the outer wall of the transfer chamber near the first opening; a second guide plate fixed to the outer wall of the adjusting component; the first and second guide plates are arranged in a V-shape; an air passage is radially formed in the transfer chamber, with the air outlet facing the first opening; wherein, the second guide plate moves away from the first guide plate, and the adjusting component drives the arc-shaped plate to move axially synchronously to open the air passage, and the air outlet blows air axially along the transfer chamber to prevent material from entering the gap between the transfer chamber and the arc-shaped plate.

Description

Technical Field

[0001] This invention belongs to the field of drying equipment technology, specifically relating to dryers, and more particularly to a vacuum dryer and its working method. Background Technology

[0002] Nano-silver oxide (Ag₂O), as an important nanomaterial, possesses unique physicochemical properties and is widely used in catalysis, antibacterial, electronics, and optics. Its high specific surface area and good biocompatibility make it particularly valuable in medical and environmental protection fields. Traditional nano-silver oxide preparation processes typically include steps such as "reaction-precipitation-separation-washing-drying." However, this process has significant drawbacks. Byproducts generated during the reaction (such as sodium nitrate) coexist with nano-silver oxide particles for extended periods, easily adsorbing onto the particle surface or encapsulating in aggregates. Therefore, multiple washing methods are needed to dynamically remove byproducts, preventing contamination of the product particles at the source and significantly improving product purity. For example, continuously adding high-purity water at 45-55℃ to the circulating concentrate. The water replenishment rate is linked to the permeate discharge rate via a flow meter to maintain a strict dynamic balance, ensuring the total liquid level and solid content within the system. Due to the numerous washing cycles, this method leads to more stringent requirements for subsequent drying.

[0003] In the related technology, authorized publication number CN120819963B, entitled "Double Cone Vacuum Dryer and Silver Nitrate Drying Method," the invention uses a second power mechanism in conjunction with a blowing adjustment mechanism to reciprocate and adjust the blowing direction and flow rate of hot nitrogen. Specifically, the second power mechanism drives an arc-shaped plate to reciprocate relative to the transfer chamber to adjust the direction and flow rate of the hot nitrogen blowing out from the opening; a second guide plate is provided on the arc-shaped plate, and the first guide plate and the second guide plate are arranged in a V-shape to guide the hot nitrogen to be blown out from between the first guide plate and the second guide plate.

[0004] However, when the arc-shaped plate drives the second guide plate to rotate away from the first guide plate, the dried material will enter the gap between the arc-shaped plate and the transfer chamber. Long-term accumulation will affect the rotation of the arc-shaped plate relative to the transfer chamber. If the gap between the outer wall of the arc-shaped plate and the inner wall of the transfer chamber is reduced so that they abut against each other, although the material can be prevented from entering the gap, the rigid contact between the two metal parts of the arc-shaped plate and the transfer chamber will cause friction between the arc-shaped plate and the transfer chamber, generating metal powder that falls into the material hopper and affects the purity of the material in the hopper.

[0005] Therefore, how to prevent dry material from entering the gap between the arc plate and the transfer chamber is a technical problem that urgently needs to be solved in this field.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore, the above description is not considered to constitute information related to the technology. Summary of the Invention

[0007] This disclosure provides at least one vacuum dryer and its operating method.

[0008] In a first aspect, embodiments of this disclosure provide a vacuum dryer, comprising: The air blowing adjustment mechanism is located in the inner cavity of the hopper. The air blowing adjustment mechanism is connected to the air circuit mechanism, and the second power mechanism is movably connected to the air blowing adjustment mechanism. The air blowing adjustment mechanism includes: Transit compartment, curved plate, first guide plate, second guide plate, and adjusting components; The air supply line of the air circuit mechanism is connected to the transfer chamber, and the arc-shaped plate is rotatably installed inside the transfer chamber; The outer wall of the transfer warehouse has a first opening, which is located on the moving path of the arc-shaped plate. The arc-shaped plate is fixed to the side wall of the adjusting member, and the adjusting member is adapted to move along the axial direction of the transfer compartment; The first guide plate is fixed to the upper edge of the outer wall of the transfer warehouse near the first opening; The second guide plate is fixed to the outer wall of the adjusting member and is slidably disposed within the first opening; The first guide plate and the second guide plate are arranged in a V-shape to guide hot nitrogen gas to be blown out from between the first guide plate and the second guide plate; The transfer compartment has an air duct opened radially, and the air outlet of the air duct faces the first opening; When the adjusting component rotates circumferentially, it drives the second guide plate to move closer to or away from the first guide plate. The second guide plate moves away from the first guide plate, and the adjusting component drives the arc plate to move axially in sync to open the air passage. The air outlet blows air along the axial direction of the transfer chamber to block the material from entering the gap between the transfer chamber and the arc plate.

[0009] In one alternative embodiment, the adjusting member includes: The regulating disc is rotatably located inside the transfer compartment, and there is a gap between its side wall and the inner wall of the transfer compartment. A sealing sleeve is fixed to the side wall of the regulating plate, extends axially along the transfer compartment, and has a second opening. The return spring has its two ends fixed to the side wall of the adjustment plate and the inner wall of the transfer chamber, respectively. When the second guide plate moves away from the first guide plate to make the first opening in its maximum open / closed state, the reset spring is adapted to pull the adjustment plate axially to make the arc plate open the air passage.

[0010] In one optional embodiment, a shaft hole is provided at the center of the adjusting disc, which is fitted onto the outer wall of the rotating shaft of the second power mechanism. The rotating shaft is provided with a key along the axial direction, and the inner wall of the shaft hole is provided with a groove that matches the key. The rotating shaft drives the adjusting disk to rotate via the key, and the reset spring pulls the adjusting disk to move axially.

[0011] In one optional embodiment, the inner wall of the transfer compartment is provided with an annular groove adapted to the arc-shaped plate, and the annular groove intersects with the air passage. The adjusting disc drives the arc-shaped plate to move axially and disengage from the annular groove to open the air passage; The adjusting disc drives the arc-shaped plate to move axially and insert it into the annular groove. The arc-shaped plate is adapted to close the air passage.

[0012] In one optional embodiment, two positioning rings are fixed to the side wall of the adjusting disc, and one end of the reset spring is disposed between the two positioning rings.

[0013] In one alternative embodiment, the radial opening width of the air passage is greater than the radial thickness of the second guide plate.

[0014] In one alternative embodiment, the axial width of the second guide plate is smaller than the axial width of the first guide plate.

[0015] In one alternative embodiment, the axial width of the first guide plate is equal to the axial width of the first opening.

[0016] In one optional embodiment, the pneumatic mechanism includes: Evacuation piping and vacuum pump; The air extraction pipe is connected to the inner cavity; The evacuation line is connected to a vacuum pump to evacuate the inner cavity.

[0017] In one optional embodiment, the gas circuit mechanism further includes: an inflation pipeline and a nitrogen pump; The inflation tube extends into the inner cavity and is connected to the inflation adjustment mechanism; The inflation line is connected to a nitrogen pump to pressurize the inflation adjustment mechanism with heated nitrogen.

[0018] In one alternative implementation, the transit compartment is hollow inside and connected to an inflation pipeline. The first guide plate is fixed to the outer wall of the transfer warehouse and extends radially along the transfer warehouse; The regulating disc is rotatably located inside the transfer compartment, and there is a gap between its side wall and the inner wall of the transfer compartment. A sealing sleeve is fixed to the side wall of the adjusting disc, and a second opening is provided on its outer wall; The return spring has its two ends fixed to the side wall of the adjustment plate and the inner wall of the transfer chamber, respectively. The arc-shaped plate is fixed to the side wall of the adjustment plate and slidably disposed in the groove on the inner wall of the transfer compartment; The outer wall of the transfer warehouse has a first opening that matches the second opening, and the first opening is located on the moving path of the arc-shaped plate. The second guide plate is fixed to the outer wall of the adjusting component and is slidably disposed in the first opening; The transfer compartment has an air passage opened radially, the air outlet of the air passage faces the first opening, and the arc-shaped plate can be moved axially to open and close the air passage.

[0019] Secondly, this disclosure also provides a method for operating a vacuum dryer, the method comprising: When the adjusting component rotates circumferentially, it drives the second guide plate to move closer to or away from the first guide plate. The second guide plate moves away from the first guide plate, and the adjusting component drives the arc plate to move axially in sync to open the air passage. The air outlet blows air along the axial direction of the transfer chamber to block the material from entering the gap between the transfer chamber and the arc plate.

[0020] The beneficial effects of this invention are that it provides a vacuum dryer and its operating method. Through an axially movable adjusting component and an air passage matched with an arc-shaped plate, when the second guide plate moves away from the first guide plate, the pressure of the hot nitrogen gas in the transfer chamber decreases. The return spring pulls the adjusting component axially to open the air passage. Part of the airflow flows axially along the transfer chamber through the air passage, forming an airflow barrier that prevents the material to be dried from entering the gap between the transfer chamber and the arc-shaped plate. This avoids long-term material accumulation affecting the mechanism's movement and improves equipment reliability.

[0021] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 A perspective view of a vacuum dryer provided in an embodiment of this disclosure; Figure 2 A perspective view of the air blowing adjustment mechanism provided in an embodiment of this disclosure; Figure 3 A cross-sectional perspective view of the air blowing adjustment mechanism provided in an embodiment of this disclosure; Figure 4 This is a front view of the second guide plate away from the first guide plate, provided in an embodiment of this disclosure. Figure 5 A front view of the second guide plate near the first guide plate, provided in an embodiment of this disclosure.

[0025] In the picture: 1. Air blowing adjustment mechanism; 11. Transfer chamber; 110. First opening; 111. Annular groove; 112. Air passage; 12. Arc-shaped plate; 13. First guide plate; 14. Second guide plate; 15. Adjusting component; 151. Adjusting disc; 152. Sealing sleeve; 153. Return spring; 154. Second opening; 155. Groove; 156. Positioning ring; 2. Air circuit mechanism; 21. Air extraction pipeline; 22. Air inflation pipeline; 3. Hopper; 30. Inner cavity; 4. Second power mechanism. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0028] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify an entire column of elements when following a column of elements. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0029] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise expressly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0030] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0031] Research revealed that in the relevant technology, authorized publication number CN120819963B, the invention titled "Double Cone Vacuum Dryer and Silver Nitrate Drying Method" uses a second power mechanism in conjunction with a blowing adjustment mechanism to reciprocately adjust the blowing direction and flow rate of hot nitrogen. Specifically, the second power mechanism drives an arc-shaped plate to reciprocate relative to the transfer chamber to adjust the direction and flow rate of the hot nitrogen blowing out from the opening; a second guide plate is provided on the arc-shaped plate, and the first guide plate and the second guide plate are arranged in a V-shape to guide the hot nitrogen to be blown out from between the first guide plate and the second guide plate.

[0032] However, when the arc-shaped plate drives the second guide plate to rotate away from the first guide plate, the dried material will enter the gap between the arc-shaped plate and the transfer chamber. Long-term accumulation will affect the rotation of the arc-shaped plate relative to the transfer chamber. If the gap between the outer wall of the arc-shaped plate and the inner wall of the transfer chamber is reduced so that they abut against each other, although the material can be prevented from entering the gap, the rigid contact between the two metal parts of the arc-shaped plate and the transfer chamber will cause friction between the arc-shaped plate and the transfer chamber, generating metal powder that falls into the material hopper and affects the purity of the material in the hopper.

[0033] Therefore, how to prevent dry material from entering the gap between the arc plate and the transfer chamber is a technical problem that urgently needs to be solved in this field.

[0034] The defects in the above solutions and the reasons for their occurrence are the results of the inventors' practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventors' contributions to this disclosure.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] like Figure 1As shown, at least one embodiment provides a vacuum dryer, including: an air blowing adjustment mechanism 1, located in the inner cavity 30 of a hopper 3; the air blowing adjustment mechanism 1 is connected to an air passage mechanism 2, and a second power mechanism is movably connected to the air blowing adjustment mechanism 1; the air passage mechanism 2 is connected to the inner cavity 30 of the hopper 3. The air passage mechanism 2 includes: an extraction pipe 21 and a vacuum pump; the extraction pipe 21 is connected to the inner cavity 30; the extraction pipe 21 is connected to the vacuum pump to evacuate the inner cavity 30. Specifically, the extraction pipe 21, in conjunction with the vacuum pump, can evacuate the inner cavity 30, creating a vacuum negative pressure state in the inner cavity 30, lowering the boiling point of the liquid in the wet silver nitrate material to precipitate the solvent, and also extracting water vapor. The wet silver nitrate material is dried by combining the reduction of the boiling point to enhance evaporation and the tumbling to renew the heat transfer surface. The system includes an inflation pipe 22 and a nitrogen pump. The inflation pipe 22 extends into the inner cavity 30 and connects to the air blowing adjustment mechanism 1. The inflation pipe 22 is connected to the nitrogen pump to supply hot nitrogen to the air blowing adjustment mechanism 1. Specifically, the pumping rate of the nitrogen pump is less than the extraction rate of the vacuum pump, ensuring that the water vapor generated during the drying of the wet silver nitrate material is extracted. Both the extraction pipe 21 and the inflation pipe 22 are rigid pipes, and the inflation pipe 22 is located inside the extraction pipe 21. The inflation pipe 22, in conjunction with the nitrogen pump, replenishes the inner cavity 30 with hot nitrogen, accelerating the drying of the wet silver nitrate material. Hot nitrogen gas is pumped into the inner cavity 30. The vacuum level of the inner cavity 30 is controlled by controlling the gas intake. Hot nitrogen gas is used to assist the drying of wet materials. In the later stage of silver nitrate drying, the material evaporation is small and the pressure difference between the inside and outside of the material pile is very small, which significantly reduces the drying efficiency and lengthens the drying time. Therefore, pumping hot nitrogen gas into the inner cavity 30 during drying can promote drying.

[0038] Reference Appendix Figure 2 The air blowing adjustment mechanism 1 includes: a transfer chamber 11, an arc plate 12, a first guide plate 13, a second guide plate 14, and an adjusting component 15; the air passage 22 of the air passage mechanism 2 is connected to the transfer chamber 11, and the arc plate 12 is rotatably disposed inside the transfer chamber 11; the transfer chamber 11 is cylindrical and hollow inside. The outer wall of the transfer chamber 11 has a first opening 110, which is located on the moving path of the arc-shaped plate 12. The arc-shaped plate 12 is fixed to the side wall of the adjusting member 15, and the adjusting member 15 is adapted to move along the axial direction of the transfer chamber 11. The first guide plate 13 is fixed to the outer wall of the transfer chamber 11 near the upper edge of the first opening 110. The second guide plate 14 is fixed to the outer wall of the adjusting member 15 and is slidably disposed in the first opening 110. The first guide plate 13 and the second guide plate 14 are arranged in a V-shape to guide hot nitrogen gas to be blown out from between the first guide plate 13 and the second guide plate 14. When the second guide plate 14 is close to the first guide plate 13, the opening angle of the first opening 110 decreases, and vice versa. Figure 2In the diagram, F1 indicates the airflow direction of hot nitrogen, and F2 indicates the rotation direction of the second guide plate 14.

[0039] When the opening angle of the first opening 110 is as follows Figure 5 In the state shown, the airflow pressure in the transfer chamber 11 increases, and the airflow pressure in the transfer chamber 11 is greater than the elastic force of the return spring 153, so the return spring 153 cannot pull the adjusting member 15 to move axially.

[0040] When the opening angle of the first opening 110 is as follows Figure 4 In the state shown, the airflow pressure in the transfer chamber 11 decreases, and the airflow pressure in the transfer chamber 11 is less than the elastic force of the return spring 153. The return spring 153 pulls the adjusting member 15 to move axially, so that part of the airflow in the transfer chamber flows into the air passage 112, and finally the airflow flows along the axial direction of the transfer chamber 11 through the air outlet of the air passage 112 to form an airflow barrier, blocking the dry material from entering the gap between the transfer chamber 11 and the arc plate 12. At the same time, the airflow will not affect the direction of the airflow flowing outward through the first opening 110.

[0041] Reference Appendix Figure 3 The transfer chamber 11 has a radially arranged air passage 112, with the air outlet of the air passage 112 facing the first opening 110. When the adjusting member 15 rotates circumferentially, it drives the second guide plate 14 to move closer to or further away from the first guide plate 13. When the second guide plate 14 moves away from the first guide plate 13, the adjusting member 15 drives the arc-shaped plate 12 to move axially simultaneously to open the air passage 112. The air outlet blows air axially along the transfer chamber 11 to prevent material from entering the gap between the transfer chamber 11 and the arc-shaped plate 12. Due to the axially movable adjusting member 15 and the air passage 112 matching the arc-shaped plate 12, when the second guide plate 14 moves away from the first guide plate 13, the pressure of the hot nitrogen gas inside the transfer chamber 11 decreases. The return spring 153 pulls the adjusting member 15 axially to open the air passage 112. Part of the airflow flows along the axial direction of the transfer chamber 11 through the air duct 112 to form an airflow barrier, preventing the dried material from entering the gap between the transfer chamber 11 and the arc-shaped plate 12. This avoids long-term accumulation of material affecting the movement of the mechanism and improves the reliability of the equipment.

[0042] like Figure 3As shown in the perspective view of the air blowing adjustment mechanism 1, the layout of the transfer chamber 11, the first guide plate 13, and the second guide plate 14 is illustrated. The transfer chamber 11 has a radially arranged air passage 112, with the air outlet facing the first opening 110. When the adjusting member 15 rotates circumferentially, the second guide plate 14 moves away from the first guide plate 13. At this time, the airflow pressure in the transfer chamber 11 decreases, and the airflow pressure inside the transfer chamber 11 is less than the elastic force of the return spring 153. The return spring 153 pulls the adjusting member 15 axially, causing some of the airflow inside the transfer chamber to flow into the air passage 112. Finally, this airflow flows axially along the air outlet of the air passage 112, forming an airflow barrier that prevents the dried material from entering the gap between the transfer chamber 11 and the arc-shaped plate 12. Simultaneously, this airflow does not affect the direction of the outward airflow through the first opening 110. Figure 3 In the diagram, F1 represents the airflow direction of hot nitrogen, F2 represents the rotation direction of the second guide plate 14, and F3 represents the flow direction of hot nitrogen in the transfer chamber 11 along the air passage 112.

[0043] Continue to refer to the appendix Figure 3 The adjusting component 15 specifically comprises an adjusting disc 151, a sealing sleeve 152, and a return spring 153. The adjusting disc 151 is rotatably disposed within the transfer chamber 11. Furthermore, the shaft hole of the adjusting disc 151 is sleeved on the rotating shaft of the second power mechanism, and is driven to rotate through a pin and a groove 155. That is, the rotating shaft of the second power mechanism can drive the adjusting disc 151 to rotate in both directions relative to the transfer chamber 11.

[0044] The sealing sleeve 152 is fixed to the side wall of the adjusting plate 151 and has a second opening 154, the opening angle of which is the same as the opening angle of the first opening 110. The two ends of the return spring 153 are fixed to the side wall of the adjusting plate 151 and the inner wall of the transfer chamber 11, respectively. When the second guide plate 14 moves to the maximum opening / closing state (e.g....), Figure 4 As shown in the figure, at this time, the airflow pressure in the transfer chamber 11 decreases, and the return spring 153 pulls the adjusting plate 151 to move axially, causing the arc plate 12 to disengage from the air passage 112, so that the air passage 112 is in an open state, and part of the airflow in the transfer chamber 11 flows into the air passage 112. As shown in the cross-sectional perspective view, the inner wall of the transfer chamber 11 is provided with an annular groove 111, and the arc plate 12 can be inserted into or disengaged from the annular groove 111 to open or close the air passage 112. The radial width of the air passage 112 is greater than the thickness of the second guide plate 14 to ensure smooth airflow; the axial width of the first guide plate 13 is equal to the width of the first opening 110 to optimize the guiding effect. Figure 4 and Figure 5 The images show the states of the second guide plate 14 moving away from and closer to the first guide plate 13, respectively, visually demonstrating the airflow adjustment process.

[0045] At least one embodiment provides a vacuum dryer, comprising: a transfer chamber 11, which is hollow inside and connected to an air filling pipe 22; a first guide plate 13, which is fixed to the outer wall of the transfer chamber 11 and extends radially along the transfer chamber 11; an adjusting plate 151, which is rotatably disposed inside the transfer chamber 11 and has a gap between its side wall and the inner wall of the transfer chamber 11; a sealing sleeve 152, which is fixed to the side wall of the adjusting plate 151 and has a second opening 154 on its outer wall; a return spring 153, whose two ends are respectively fixed to the side wall of the adjusting plate 151 and the inner wall of the transfer chamber 11; and an arc-shaped plate 12. It is fixed to the side wall of the adjusting plate 151 and slidably disposed in the groove of the inner wall of the transfer chamber 11; the outer wall of the transfer chamber 11 is provided with a first opening 110 that matches the second opening 154, and the first opening 110 is located on the moving path of the arc plate 12; the second guide plate 14 is fixed to the outer wall of the adjusting member 15 and slidably disposed in the first opening 110; the transfer chamber 11 is provided with an air passage 112 in the radial direction, the air outlet of the air passage 112 faces the first opening 110, and the arc plate 12 can be axially moved to open and close the air passage 112.

[0046] The working principle of a vacuum dryer is as follows: Air is extracted from the inner cavity 30 through the evacuation pipe 21 connected to the vacuum pump, and hot nitrogen is supplied into the inner cavity 30 through the inflation pipe 22 connected to the nitrogen pump. Hot nitrogen gas is delivered into the inner cavity 30 through the first opening 110 to dry the material (wet silver nitrate material) in the inner cavity 30. When the opening angle of the first opening 110 is as follows Figure 5 In the state shown, the airflow pressure in the transfer chamber 11 increases, and the airflow pressure in the transfer chamber 11 is greater than the elastic force of the return spring 153, so the return spring 153 cannot pull the adjusting member 15 to move axially. Figure 5 In the diagram, F1 indicates the direction of flow of hot nitrogen gas.

[0047] When the opening angle of the first opening 110 is as follows Figure 4 In the state shown, the airflow pressure in the transfer chamber 11 decreases, and the airflow pressure in the transfer chamber 11 is less than the elastic force of the return spring 153. The return spring 153 pulls the adjusting member 15 to move axially, so that part of the airflow in the transfer chamber flows into the air passage 112, and finally the airflow flows along the axial direction of the transfer chamber 11 through the air outlet of the air passage 112 to form an airflow barrier, blocking the dry material from entering the gap between the transfer chamber 11 and the arc plate 12. At the same time, the airflow will not affect the direction of the airflow flowing outward through the first opening 110. Figure 4 In the diagram, F1 indicates the direction of flow of hot nitrogen gas.

[0048] At least one embodiment provides a method of operating a vacuum dryer, the method comprising: When the adjusting member 15 rotates circumferentially, it drives the second guide plate 14 to move closer to or away from the first guide plate 13. The second guide plate 14 moves away from the first guide plate 13, and the adjusting member 15 drives the arc plate 12 to move axially in sync to open the air passage 112. The air outlet blows air axially along the transfer chamber 11 to block the material from entering the gap between the transfer chamber 11 and the arc plate 12.

[0049] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0050] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0051] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A vacuum dryer, characterized in that, include: The air blowing adjustment mechanism (1) is located in the inner cavity (30) of the hopper (3). The air blowing adjustment mechanism (1) is connected to the air passage mechanism (2), and the second power mechanism (4) is movably connected to the air blowing adjustment mechanism (1). The blowing adjustment mechanism (1) includes: The transit compartment (11), the arc plate (12), the first guide plate (13), the second guide plate (14), and the adjusting component (15); The air supply pipe (22) of the air supply mechanism (2) is connected to the transfer chamber (11), and the arc plate (12) is rotatably disposed in the transfer chamber (11); The outer wall of the transfer compartment (11) has a first opening (110), which is located on the moving path of the arc plate (12). The arc-shaped plate (12) is fixed to the side wall of the adjusting member (15), and the adjusting member (15) is adapted to move axially along the transfer compartment (11); The first guide plate (13) is fixed to the upper edge of the outer wall of the transfer warehouse (11) near the first opening (110); The second guide plate (14) is fixed to the outer wall of the adjusting member (15) and is slidably disposed in the first opening (110); The first guide plate (13) and the second guide plate (14) are arranged in a V-shape to guide hot nitrogen gas to be blown out from between the first guide plate (13) and the second guide plate (14); The transfer chamber (11) has an air passage (112) in the radial direction, and the air outlet of the air passage (112) faces the first opening (110). When the adjusting member (15) rotates circumferentially, it drives the second guide plate (14) to move closer to or further away from the first guide plate (13). The second guide plate (14) moves away from the first guide plate (13), and the adjusting member (15) drives the arc plate (12) to move axially in sync to open the air passage (112). The air outlet blows air axially along the transfer chamber (11) to block the material from entering the gap between the transfer chamber (11) and the arc plate (12). The adjusting member (15) includes: The regulating plate (151) is rotatably disposed in the transfer chamber (11), and a gap is provided between its side wall and the inner wall of the transfer chamber (11); A sealing sleeve (152) is fixed to the side wall of the adjusting plate (151), extends axially along the transfer chamber (11), and has a second opening (154). The return spring (153) has its two ends fixed to the side wall of the adjusting plate (151) and the inner wall of the transfer chamber (11), respectively; When the second guide plate (14) moves away from the first guide plate (13) so that the first opening (110) is in the maximum open / closed state, the reset spring (153) is adapted to pull the adjustment plate (151) axially so that the arc plate (12) opens the air passage (112).

2. The vacuum dryer as described in claim 1, characterized in that, The adjusting disc (151) has a shaft hole at its center, which is fitted onto the outer wall of the rotating shaft of the second power mechanism (4); The rotating shaft is provided with a key along the axial direction, and the inner wall of the shaft hole is provided with a groove (155) that matches the key. The rotating shaft drives the adjusting disk (151) to rotate via the key, and the reset spring (153) pulls the adjusting disk (151) to move axially.

3. The vacuum dryer as described in claim 1, characterized in that, The inner wall of the transfer compartment (11) is provided with an annular groove (111) that is adapted to the arc plate (12), and the annular groove (111) intersects with the air passage (112); The regulating disc (151) drives the arc plate (12) to move axially away from the annular groove (111) to open the air passage (112). The adjusting plate (151) drives the arc plate (12) to move axially and insert into the annular groove (111), and the arc plate (12) is adapted to close the air passage (112).

4. The vacuum dryer as described in claim 1, characterized in that, Two positioning rings (156) are fixed to the side wall of the adjusting disc (151), and one end of the reset spring (153) is located between the two positioning rings (156).

5. The vacuum dryer as described in claim 1, characterized in that, The radial opening width of the air passage (112) is greater than the radial thickness of the second guide plate (14).

6. The vacuum dryer as described in claim 1, characterized in that, The axial width of the second guide plate (14) is smaller than the axial width of the first guide plate (13).

7. The vacuum dryer as described in claim 6, characterized in that, The axial width of the first guide plate (13) is equal to the axial width of the first opening (110).

8. The vacuum dryer as described in claim 1, characterized in that, The gas passage mechanism (2) includes: The extraction pipeline (21) and vacuum pump; The air extraction pipe (21) is connected to the inner cavity (30); The evacuation line (21) is connected to a vacuum pump to evacuate the inner cavity (30).

9. The vacuum dryer as described in claim 8, characterized in that, The gas circuit mechanism (2) further includes: an air filling pipeline (22) and a nitrogen pump; The inflation tube (22) extends into the inner cavity (30) and is connected to the inflation adjustment mechanism (1); The inflation line (22) is connected to a nitrogen pump to charge heated nitrogen into the inflation adjustment mechanism (1).

10. The vacuum dryer according to any one of claims 1-9, characterized in that, include: The transit compartment (11) is hollow inside and connected to the inflation pipe (22); The first guide plate (13) is fixed to the outer wall of the transfer compartment (11) and extends radially along the transfer compartment (11); The regulating plate (151) is rotatably disposed in the transfer chamber (11), and a gap is provided between its side wall and the inner wall of the transfer chamber (11); A sealing sleeve (152) is fixed to the side wall of the adjusting plate (151), and a second opening (154) is provided on the outer wall. The return spring (153) has its two ends fixed to the side wall of the adjusting plate (151) and the inner wall of the transfer chamber (11), respectively; The arc plate (12) is fixed to the side wall of the adjusting plate (151) and is slidably disposed in the groove of the inner wall of the transfer compartment (11); The outer wall of the transfer compartment (11) has a first opening (110) that matches the second opening (154), and the first opening (110) is located on the moving path of the arc plate (12); The second guide plate (14) is fixed to the outer wall of the adjusting member (15) and is slidably disposed in the first opening (110); The transfer chamber (11) has an air passage (112) in the radial direction, the air outlet of the air passage (112) faces the first opening (110), and the arc plate (12) can be moved axially to open and close the air passage (112).

11. A method for operating a vacuum dryer, characterized in that, The working method of using the vacuum dryer as described in any one of claims 1-9 includes: When the adjusting member (15) rotates circumferentially, it drives the second guide plate (14) to move closer to or further away from the first guide plate (13). The second guide plate (14) moves away from the first guide plate (13), and the adjusting member (15) drives the arc plate (12) to move axially in sync to open the air passage (112). The air outlet blows air axially along the transfer chamber (11) to block the material from entering the gap between the transfer chamber (11) and the arc plate (12).

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