Paris gypsum powder storage device and production line and gypsum board production line

Abstract

The utility model provides a calcined gypsum powder storage device, a production line and a gypsum board production line. The calcined gypsum powder storage device comprises a storage bin, a first conveying assembly and a second conveying assembly. The storage bin is provided with a first discharge port, a second discharge port and a discharge valve assembly; the discharging valve assembly is arranged to be capable of communicating the inner cavity of the bin body with at least one of the first discharging opening and the second discharging opening; the first conveying assembly is arranged corresponding to the first discharging opening and is arranged to convey materials output from the first discharging opening to a gypsum board production device; the second conveying assembly is arranged corresponding to the second discharging port and is arranged to convey the materials output from the second discharging port to the material returning port. The calcined gypsum powder storage device can ensure that the phase composition consistency of calcined gypsum powder used for gypsum board production is good.

Description

Technical Field

[0001] This application relates to the field of gypsum production equipment technology, and more particularly to a calcined gypsum powder storage device and production line, as well as a gypsum board production line. Background Technology

[0002] The gypsum board production line requires calcined gypsum powder as raw material. After frying and grinding, the calcined gypsum powder is transported to a storage silo for later use. In the storage silo, the calcined gypsum powder undergoes a mixed aging process. During this process, the undehydrated dihydrate gypsum in the calcined gypsum powder is dehydrated into hemihydrate gypsum using the residual heat of calcination. Meanwhile, the anhydrous gypsum formed due to uneven calcination can absorb water and hydrate into hemihydrate gypsum, resulting in a more uniform phase composition of the calcined gypsum powder. Therefore, aging the calcined gypsum powder in the storage silo helps improve the quality and grade of the subsequently produced paper-faced gypsum boards.

[0003] However, the varying aging times of calcined gypsum powder in storage result in uneven powder characteristics and particle size distribution, leading to inconsistent aging effects. Calcined gypsum powder aged for longer periods differs significantly in properties from newly produced powder. With current calcined gypsum powder storage devices, external factors cause different batches to age for varying durations, resulting in inconsistent phase compositions. Subsequent gypsum board production lines must adjust other ingredients based on the material characteristics of a particular batch, leading to instability in the gypsum board production process and significant fluctuations in the quality of the finished gypsum boards. Furthermore, calcined gypsum powder aged beyond a certain time can negatively impact the strength and adhesion of the gypsum boards, making it difficult to guarantee quality. Utility Model Content

[0004] To address the aforementioned issues, this application provides a calcined gypsum powder storage device, a production line, and a gypsum board production line. The discharge valve assembly of the calcined gypsum powder storage device can selectively connect the storage chamber to a first discharge port and convey the material to the gypsum board production device via a first conveying assembly. The discharge valve assembly can also selectively connect the storage chamber to a second discharge port and send the material back into the storage chamber via a second conveying assembly. In this way, calcined gypsum powder with a mixing and aging time that meets the production requirements can be preferentially sent to the gypsum board production device, while calcined gypsum powder with a longer mixing and aging time can be returned to the storage chamber to mix with the newly produced material entering the storage chamber, thereby ensuring good consistency of the phase composition of the calcined gypsum powder used in subsequent production.

[0005] The specific technical solutions of this application embodiment are as follows:

[0006] A storage device for calcined gypsum powder, comprising:

[0007] The storage bin includes a bin body with an inner cavity, a return port, a first discharge port, and a second discharge port. The inner cavity of the bin body is used to hold calcined gypsum powder. The storage bin is also provided with a discharge valve assembly, which is configured to connect the inner cavity of the bin body to at least one of the first discharge port and the second discharge port.

[0008] A first conveying component, corresponding to the first discharge port, is configured to convey the material output from the first discharge port to the gypsum board production device; and

[0009] The second conveying component is configured to correspond to the second discharge port and to convey the material output from the second discharge port to the return port.

[0010] A calcined gypsum powder production line includes a calcined gypsum powder storage device as described in the above embodiments.

[0011] A gypsum board production line includes a calcined gypsum powder production line as described in the above embodiments.

[0012] The technical advantages of the gypsum powder storage device in this application embodiment are as follows:

[0013] The calcined gypsum powder storage device provided in this application embodiment has two discharge ports: a first discharge port and a second discharge port. The storage chamber also includes a discharge valve assembly. The discharge valve assembly can selectively connect the storage chamber to the first discharge port and convey the material to a gypsum board production device via a first conveying assembly. This allows calcined gypsum powder in the storage chamber with a mixing and aging time that meets the requirements for gypsum board production to be preferentially conveyed to the gypsum board production device for gypsum board production via the first discharge port and the first conveying assembly. The discharge valve assembly can also selectively connect the storage chamber to the second discharge port and return the material to the storage chamber via the second conveying assembly. This allows calcined gypsum powder with an excessively long mixing and aging time in the storage chamber to be returned to the storage chamber via the second discharge port and the second conveying assembly, where it can be mixed and aged again with newly produced calcined gypsum powder entering the storage chamber. This ensures good phase composition consistency of the calcined gypsum powder in the storage chamber, meeting the requirements for gypsum board production. The calcined gypsum powder storage device of this application can ensure good consistency of phase composition of the calcined gypsum powder used in gypsum board production, thereby improving the quality of gypsum boards produced subsequently.

[0014] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the application. Other advantages of this application can be realized and obtained by means of the solutions described in the description and the accompanying drawings. Attached Figure Description

[0015] The accompanying drawings are used to provide an understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0016] Figure 1 This is a schematic diagram of the structure of a calcined gypsum powder storage device according to an embodiment of this application. Detailed Implementation

[0017] This application describes several embodiments, but these descriptions are exemplary and not restrictive, and it will be apparent to those skilled in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. The embodiments, features, and elements disclosed in this application can also be combined with any conventional features or elements.

[0018] Please refer to the instruction manual appendix. Figure 1 The diagram shown is a structural schematic of a gypsum powder storage device according to an exemplary embodiment of this application. Figure 1 In the diagram, lines with larger arrows indicate the direction of material flow, while lines with smaller arrows are indicator lines for the attached diagram number.

[0019] like Figure 1 The embodiment of this application provides a calcined gypsum powder storage device, including a storage bin 1, a first conveying assembly 2, and a second conveying assembly 3. The storage bin 1 includes a bin body 11 with an inner cavity, a return port 12, a first discharge port 13, and a second discharge port 14. The inner cavity of the bin body 11 is used to hold the calcined gypsum powder. The storage bin 1 also includes a discharge valve assembly 15, which is configured to connect the inner cavity of the bin body 11 with at least one of the first discharge port 13 and the second discharge port 14. The first conveying assembly 2 is correspondingly arranged with the first discharge port 13 and is configured to convey the material output from the first discharge port 13 to a gypsum board production device. The second conveying assembly 3 is correspondingly arranged with the second discharge port 14 and is configured to convey the material output from the second discharge port 14 to the return port 12.

[0020] Specifically, in the calcined gypsum powder storage device provided in this application embodiment, the storage chamber 1 still has an inlet. Newly produced calcined gypsum powder enters the inner cavity of the chamber 11 through the inlet for mixing and aging. The calcined gypsum powder storage device of this application has two outlets in its storage chamber 1: a first outlet 13 and a second outlet 14. The storage chamber 1 also has a discharge valve assembly 15. In actual use, the mixing and aging time of the calcined gypsum powder in the chamber 11 is first determined. Calcined gypsum powder aging for a certain period will affect the strength and bonding performance of the gypsum board, making it difficult to guarantee the quality of the gypsum board. Furthermore, external factors such as equipment failure in the subsequent gypsum board production equipment can cause the calcined gypsum powder to remain in the storage chamber 1 for too long, preventing it from being utilized in a timely manner. The discharge valve assembly 15 can selectively connect the silo 11 to the first discharge port 13 and convey the material to the gypsum board production device through the first conveying assembly 2. This allows calcined gypsum powder in the storage silo 1, whose mixing and aging time meets the requirements for subsequent gypsum board production, to be preferentially conveyed to the gypsum board production device for gypsum board production via the first discharge port 13 and the first conveying assembly 2. The discharge valve assembly 15 can also selectively connect the silo 11 to the second discharge port 14 and return the material to the silo 11 via the second conveying assembly 3. This allows calcined gypsum powder in the storage silo 1 with an excessively long mixing and aging time to be returned to the silo 11 via the second discharge port 14 and the second conveying assembly 3, where it can be mixed and aged again with the newly produced calcined gypsum powder that has just entered the silo 11 through the inlet. This ensures good phase composition consistency of the calcined gypsum powder in the storage silo 1, meeting the requirements for subsequent production. The calcined gypsum powder storage device of this application can ensure good phase composition consistency of the calcined gypsum powder used in subsequent production, thereby improving the quality of the subsequently produced gypsum board.

[0021] It is understandable that in actual use, if the aging time of calcined gypsum powder in the silo 11 is too short, the calcined gypsum powder will not be fully mixed and aged, and the phase composition of the calcined gypsum powder will be uneven, which will not meet the requirements for subsequent gypsum board production.

[0022] In one exemplary embodiment, the storage compartment 1 is equipped with a timer for calculating the aging time of the calcined gypsum powder in the compartment 11.

[0023] Specifically, based on actual production experience, when the calcined gypsum powder is placed in the silo 11 for 3 to 5 days, the calcined gypsum powder meets the requirements for gypsum board production after aging; when the calcined gypsum powder is placed for 7 days or more, the calcined gypsum powder is over-aged, which will affect the strength and bonding performance of the gypsum board produced subsequently.

[0024] Optionally, the calcined gypsum powder storage device is provided with multiple storage compartments 1 and multiple timers, with each storage compartment 1 corresponding to one of the multiple timers. Each timer calculates the aging time of the calcined gypsum powder in its corresponding storage compartment 1.

[0025] A timer calculates the aging time of a batch of calcined gypsum powder entering storage silo 1 within silo body 11. When the aging time calculated by the timer is the set time, the batch of calcined gypsum powder, after mixing and aging, meets the requirements for gypsum board production. The set time can be set to 3 to 5 days. When the aging time calculated by the timer for a batch of calcined gypsum powder is less than the set time, the batch of calcined gypsum powder needs to continue aging in silo body 11. When the aging time calculated by the timer for a batch of calcined gypsum powder is greater than the set time, the batch of calcined gypsum powder needs to be returned to silo body 11 and mixed with newly produced calcined gypsum powder just delivered to silo body 11 for further aging.

[0026] It is understood that the number of storage bins 1 and bin bodies 11 of the gypsum powder storage device in this application embodiment can be adjusted accordingly based on the scale of the gypsum board production line.

[0027] In one exemplary embodiment, such as Figure 1 As shown, the discharge valve assembly 15 includes a three-way discharge valve. The silo body 11 is provided with a discharge port 111 and a return port 12. The three-way discharge valve is provided with a feed port (not shown in the figure), a first discharge port 13 and a second discharge port 14. The feed port and the discharge port 111 are connected to each other.

[0028] Specifically, the three-way discharge valve can selectively connect the discharge port 111 of the silo 11 to at least one of the first discharge port 13 and the second discharge port 14. When the operator conveys materials to the gypsum board production device through the first conveying assembly 2, the three-way discharge valve connects the discharge port 111 to the first discharge port 13; when the operator performs a return operation through the second conveying assembly 3, the three-way discharge valve connects the discharge port 111 to the second discharge port 14.

[0029] In an exemplary embodiment, the discharge valve assembly 15 includes a first discharge valve (not shown in the figure) and a second discharge valve (not shown in the figure). The hopper body 11 is provided with a first discharge port (not shown in the figure), a second discharge port (not shown in the figure), and a return port 12. The first discharge valve is provided with a first inlet port (not shown in the figure) and a first discharge port 13. The second discharge valve is provided with a second inlet port (not shown in the figure) and a second discharge port 14. The first inlet port is connected to the first discharge port, and the second inlet port is connected to the second discharge port.

[0030] Specifically, the specific structure of the discharge valve assembly 15 in this application is not limited to a three-way discharge valve, a first discharge valve, and a second discharge valve. It can also be configured in other structural forms, as long as it can achieve selective communication between the silo body 11 and the first discharge port 13 and the second discharge port 14. All of these are within the protection scope of this application.

[0031] In one exemplary embodiment, the discharge valve assembly 15 includes at least one of a manual gate valve and an automatic control valve. The automatic control valve includes at least one of a pneumatic valve and an electric valve.

[0032] Optionally, in actual use, the discharge valve assembly 15 can be either a manual gate valve or an automatic control valve. When the automatic control valve malfunctions, the manual gate valve can be manually operated to perform the discharge and return operations, thus not delaying the subsequent gypsum board production.

[0033] In one exemplary embodiment, such as Figure 1 As shown, there are multiple storage bins 1, each storage bin 1 is equipped with a discharge valve assembly 15, a first conveying assembly 2 is correspondingly set with the first discharge port 13 of each storage bin 1, and a second conveying assembly 3 is correspondingly set with the second discharge port 14 of each storage bin 1.

[0034] Specifically, Figure 1 In the illustrated embodiment, there are three storage bins 1. The number of storage bins 1 in the gypsum powder storage device of this application can also be one, two, four, or more, all of which are within the protection scope of this application. The number and volume of the storage bins 1 should match the production scale of the gypsum board production line.

[0035] It is understood that having multiple storage bins 1 expands the practical applicability of the calcined gypsum powder storage device of this application. For example, the calcined gypsum powder storage device of this application can have two or three storage bins 1. If production stops due to equipment failure in the gypsum board production equipment, causing the aging time of a certain batch of calcined gypsum powder stored in one storage bin 1 to exceed the set time (the set time is generally 3 to 5 days), the operator can also consider using another batch of calcined gypsum powder stored in another storage bin 1. If the mixed aging time of the other batch of calcined gypsum powder meets the production requirements, this batch of calcined gypsum powder can be used in a timely manner without delaying gypsum board production. Furthermore, the operator can recycle the batch of calcined gypsum powder that has exceeded the set time, and age it again with the newly produced calcined gypsum powder that has just been input into storage bin 1 for subsequent production use. This avoids wasting a batch of calcined gypsum powder with an excessively long aging time and also avoids delaying the operation of the gypsum board production line.

[0036] In an exemplary embodiment, the gypsum powder storage device further includes a control component. Multiple storage chambers 1 are provided. The control component is electrically connected to the timer, the discharge valve assembly 15, the first conveying assembly 2, and the second conveying assembly 3.

[0037] Specifically, the control component has a control panel that communicates with a timer. The control panel displays the aging time of the corresponding batch of calcined gypsum powder in each storage bin 1. The control component communicates with the gypsum board production device to obtain instructions from the gypsum board production device to transport materials. It then matches the storage bin 1 corresponding to one or more batches of calcined gypsum powder whose aging time meets the production requirements and activates the discharge valve assembly 15 of that storage bin 1 to transport the material to the gypsum board production device via the first conveying assembly 2. The control component determines the storage bin 1 corresponding to one or more batches of calcined gypsum powder with an excessively long aging time and activates the discharge valve assembly 15 of that storage bin 1 to return the material to the storage bin 1 with new material input via the second conveying assembly 3.

[0038] In one exemplary embodiment, such as Figure 1 As shown, the gypsum powder storage device also includes a first material detection valve 4, which is located near the first discharge port 13. The first material detection valve 4 is configured to detect whether there is material output from the first discharge port 13.

[0039] The calcined gypsum powder storage device also includes a second material detection valve 5, which is located near the second discharge port 14 and is configured to detect whether there is material output from the second discharge port 14.

[0040] Specifically, the first material detection valve 4 and the second material detection valve 5 are mechanical devices for detecting the presence or absence of materials. This allows for timely feedback on whether upstream materials are blocked, eliminating the need for operators to visit the storage bin 1 to check for blockages.

[0041] It is understood that if a discharge device is also provided at the first discharge port 13, the first material detection valve 4 can be located at the outlet of the discharge device; if a discharge device is not provided at the first discharge port 13, the first material detection valve 4 can be located at the first discharge port 13. All of the above situations are within the protection scope of this application.

[0042] If a discharge device is also provided at the second discharge port 14, the second material detection valve 5 can be located at the outlet of the discharge device; if no discharge device is provided at the second discharge port 14, the second material detection valve 5 can be located at the second discharge port 14. All of the above situations are within the scope of protection of this application.

[0043] In one exemplary embodiment, such as Figure 1 As shown, the first discharge port 13 is connected to the first unloader 6, and the second discharge port 14 is connected to the second unloader 7. The outlet of the first unloader 6 is set to correspond to the first conveying component 2, and the outlet of the second unloader 7 is set to correspond to the second conveying component 3.

[0044] Optionally, both the first unloader 6 and the second unloader 7 can be star-shaped feeders. Star-shaped feeders can ensure that the air pressure in the conveying pipeline does not leak, and can safely convey and collect materials.

[0045] In one exemplary embodiment, both the first unloader 6 and the second unloader 7 are frequency converters.

[0046] Specifically, the first unloader 6 is a frequency converter, which allows the discharge rate of the first unloader 6 to be adjusted according to the production speed of the gypsum board production unit, ensuring the production volume and material mixing uniformity of the gypsum board production line. The second unloader 7 is also a frequency converter, which allows the discharge rate of the second unloader 7 to be adjusted according to the amount of new production material conveyed to the silo 11, ensuring that the aged gypsum powder returned to the silo 11 and the newly produced gypsum powder can be mixed evenly.

[0047] In one exemplary embodiment, such as Figure 1 As shown, the first conveying assembly 2 includes a first conveyor 21 and a first elevator 22 arranged longitudinally. The inlet of the first conveyor 21 is correspondingly arranged with the first outlet 13, and the outlet of the first conveyor 21 is correspondingly arranged with the inlet of the first elevator 22.

[0048] The second conveying assembly 3 includes a second conveyor 31, a longitudinally arranged second elevator 32, and a third conveyor 33. The inlet of the second conveyor 31 is corresponding to the second outlet 14, the outlet of the second conveyor 31 is corresponding to the inlet of the second elevator 32, the outlet of the second elevator 32 is corresponding to the inlet of the third conveyor 33, and the outlet of the third conveyor 33 is corresponding to the return port 12.

[0049] Optionally, the first conveyor 21 and the second conveyor 31 can be conveying zipper machines, and the first elevator 22 and the second elevator 32 can be bucket elevators.

[0050] In one exemplary embodiment, such as Figure 1 As shown, the third conveyor 33 is an air chute, and the number of air chute outlets 33-1 is equal to the number of return ports 12 and they correspond one-to-one.

[0051] The air chute is equipped with a fan 33-2, which is configured to supply air to the conveying channel of the air chute.

[0052] Specifically, the number of outlets 33-1 of the air chute is equal to the number of return ports 12 of the storage bin 1 and they correspond one-to-one. In this way, calcined gypsum powder that has been aged for too long in a certain storage bin 1 can be returned to any storage bin 1 through the outlets 33-1 of the air chute. Preferably, the calcined gypsum powder that has been aged for too long can be returned to a bin 11 that has newly produced calcined gypsum powder input.

[0053] This application provides a calcined gypsum powder production line, including a calcined gypsum powder storage device as described in any of the exemplary embodiments above.

[0054] Specifically, the calcined gypsum powder production line provided in this application embodiment further includes a calcined gypsum powder frying device and a calcined gypsum powder grinding device. The calcined gypsum powder production line provided in this application embodiment includes the calcined gypsum powder storage device described in any of the above exemplary embodiments, and therefore has the structural features and advantages of the calcined gypsum powder storage device described in any of the above exemplary embodiments, which will not be repeated here.

[0055] This application provides a gypsum board production line, including a calcined gypsum powder production line as described in any of the exemplary embodiments above.

[0056] Specifically, the gypsum board production line provided in this application embodiment further includes a gypsum board production apparatus. The gypsum board production line provided in this application embodiment includes a calcined gypsum powder production line and a calcined gypsum powder storage device as described in any of the above exemplary embodiments, and therefore possesses the structural features and advantages of the calcined gypsum powder storage device described in any of the above exemplary embodiments, which will not be elaborated upon here.

[0057] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 this application.

[0058] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0060] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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 this application. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A gypsum plaster powder storage device, characterized in that, The device comprises: a storage bin comprising a bin body with an inner cavity, a return port, a first discharge port and a second discharge port, the inner cavity of the bin body being used for placing gypsum powder; the storage bin is further provided with a discharge valve assembly, which is arranged to communicate the inner cavity of the bin body with at least one of the first discharge port and the second discharge port; a first conveying assembly arranged corresponding to the first discharge port and arranged to convey the material output from the first discharge port to a gypsum board production device; and a second conveying assembly arranged corresponding to the second discharge port and arranged to convey the material output from the second discharge port to the return port. The discharge valve assembly comprises a three-way discharge valve, the bin body is provided with a discharge port and the return port, the three-way discharge valve is provided with an inlet port, the first discharge port and the second discharge port, and the inlet port is in communication with the discharge port; or 2. The gypsum plaster powder storage device according to claim 1, characterized in that The discharge valve assembly comprises a first discharge valve and a second discharge valve, the bin body is provided with a first discharge port, a second discharge port and the return port, the first discharge valve is provided with a first inlet port and the first discharge port, the second discharge valve is provided with a second inlet port and the second discharge port, the first inlet port is in communication with the first discharge port, and the second inlet port is in communication with the second discharge port.

3. The gypsum powder storage device according to claim 2, wherein the type of the discharge valve assembly comprises at least one of a manual gate valve and an automatic control valve; wherein the automatic control valve comprises at least one of a pneumatic valve and an electric valve.

4. The gypsum powder storage device according to any one of claims 1 to 3, wherein the number of the storage bins is multiple, each of the storage bins is provided with the discharge valve assembly, the first conveying assembly is arranged corresponding to the first discharge port of each of the storage bins, and the second conveying assembly is arranged corresponding to the second discharge port of each of the storage bins.

5. The gypsum powder storage device according to any one of claims 1 to 3, wherein the gypsum powder storage device further comprises a first material detection valve, the first material detection valve is located near the first discharge port, and the first material detection valve is arranged to detect whether the first discharge port has material output; the gypsum powder storage device further comprises a second material detection valve, the second material detection valve is located near the second discharge port, and the second material detection valve is arranged to detect whether the second discharge port has material output.

6. The gypsum powder storage device according to any one of claims 1 to 3, wherein the first discharge port is connected with a first discharger, the second discharge port is connected with a second discharger, the outlet of the first discharger is arranged corresponding to the first conveying assembly, and the outlet of the second discharger is arranged corresponding to the second conveying assembly.

7. The gypsum powder storage device according to claim 6, wherein the first discharger and the second discharger are both frequency conversion dischargers.

8. The gypsum powder storage device according to any one of claims 1 to 3, wherein ​ The first conveying assembly comprises a first conveyor and a first vertical elevator arranged longitudinally, an inlet of the first conveyor is arranged correspondingly to the first discharge port, and an outlet of the first conveyor is arranged correspondingly to an inlet of the first vertical elevator; The second conveying assembly comprises a second conveyor, a second vertical elevator and a third conveyor, an inlet of the second conveyor is arranged correspondingly to the second discharge port, an outlet of the second conveyor is arranged correspondingly to an inlet of the second vertical elevator, an outlet of the second vertical elevator is arranged correspondingly to an inlet of the third conveyor, and an outlet of the third conveyor is arranged correspondingly to the return port.

9. The gypsum powder storage device according to claim 8, characterized in that The third conveyor is an air chute, the number of outlets of the air chute is equal to and corresponds to the number of the return ports one by one; The air chute is provided with a fan arranged to send air to a conveying channel of the air chute.

10. A gypsum plaster powder production line, characterized in that, The gypsum powder production line comprises the gypsum powder storage device according to any one of claims 1 to 9.

11. A gypsum board production line characterized in that, The gypsum powder production line comprises the gypsum powder storage device according to claim 10.

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