Lithium iron phosphate powder conveying device and method for convenient detection and sampling

Abstract

The present application relates to the field of material conveying detection, and discloses a lithium iron phosphate powder conveying device and method that is convenient for detection and sampling, including: a main conveying pipeline; multiple sampling components, each sampling component includes a sampling head, a conveying state detection component, a sample storage component and a reflux component, and the sampling head of each sampling component is arranged on the main conveying pipeline; a control component, the control component is respectively connected to the sampling heads, conveying state detection components, sample storage components and reflux components of multiple sampling components, when the conveying material-gas ratio is within the preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the sample storage component, when the conveying material-gas ratio is not within the preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the reflux component. The present application can ensure the convenience of lithium iron phosphate powder detection sampling and the reliability of the detection results.

Description

Technical Field

[0001] The present application relates to the technical field of material conveying detection, and more specifically, to a lithium iron phosphate powder conveying device and method that is convenient for detection and sampling. Background Art

[0002] As a new type of high-performance lithium battery material, lithium iron phosphate (LiFePO4) has been widely used in electric vehicles, energy storage systems and other fields due to its good cycle stability, safety and environmental protection. In the production process of lithium iron phosphate, the transportation and transfer of lithium iron phosphate powder is a crucial link. Traditional lithium iron phosphate powder conveying devices generally use spiral conveying, pneumatic conveying or vibration conveying to achieve efficient transportation and transfer of lithium iron phosphate powder.

[0003] The existing lithium iron phosphate powder conveying device can effectively complete the transportation of powder, but when faced with fine particles and high fluidity powder, it is difficult to take into account the detection and sampling needs of lithium iron phosphate powder. In the production and use of lithium iron phosphate powder, accurate quality inspection is crucial, and there are many difficulties in testing and sampling the powder. Since lithium iron phosphate powder usually has good fluidity and a significant particle size distribution, it is difficult to completely avoid the problem of sample uniformity when sampling. For lithium battery manufacturers, lithium battery manufacturers have high requirements for the consistency of lithium iron phosphate, and how to detect and confirm the consistency of lithium iron phosphate powder is an important issue. Therefore, how to improve the convenience of lithium iron phosphate powder detection and sampling and ensure the reliability of the test results is of great research significance. Summary of the invention

[0004] The purpose of this application is to provide a lithium iron phosphate powder conveying device and method that is convenient for detection and sampling, which solves the technical problem of difficulty in ensuring the convenience of lithium iron phosphate powder detection and sampling and the reliability of detection results, and achieves the technical effect of ensuring the convenience of lithium iron phosphate powder detection and sampling and the reliability of detection results.

[0005] The embodiment of the present application provides a lithium iron phosphate powder conveying device that is convenient for detection and sampling, including: a main conveying pipeline for pneumatically conveying lithium iron phosphate powder; multiple sampling components, each sampling component including a sampling head, a conveying state detection component, a sample storage component and a reflux component, the sampling head of each sampling component is arranged on the main conveying pipeline, the sampling head is used to absorb lithium iron phosphate powder from the main conveying pipeline, the sampling head is controlled by an electromagnetic valve to control the opening and closing state, the conveying state detection component is used to detect the conveying material-gas ratio of the lithium iron phosphate powder, and the reflux component is used to convey the lithium iron phosphate powder to the main conveying pipeline; a control component, the control component is respectively controlled and connected with the sampling heads, conveying state detection components, sample storage components and reflux components of the multiple sampling components, when the conveying material-gas ratio is within the preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the sample storage component, when the conveying material-gas ratio is not within the preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the reflux component.

[0006] In one possible implementation, the conveying status detection component includes a weighing chamber, a negative pressure component, a negative pressure detection component, a weighing component and a back-blowing component. The sampling head and the negative pressure component are respectively connected to the weighing chamber. The negative pressure detection component is used to test the pressure value in the weighing chamber, the weighing component is used to weigh the lithium iron phosphate powder in the weighing chamber, and the back-blowing component is used to convey the lithium iron phosphate powder in the weighing chamber to the sample storage component or the reflux component; the negative pressure component, the negative pressure detection component, the weighing component and the back-blowing component are respectively controlled and connected to the control component, and the control component is used to determine the conveying material-gas ratio according to the ratio of the weight of the lithium iron phosphate powder weighed by the weighing component and the gas weight determined by the volume of the weighing chamber.

[0007] In another possible implementation, multiple sampling components are respectively arranged at different positions of the main delivery pipeline, and a pressure detection component is provided on the sampling head of each sampling component. Each pressure detection component is electrically connected to the control component, and the control component is used to control the opening and closing state of the sampling head according to the pressure detection value of each pressure detection component.

[0008] In another possible implementation, an air source pressure detection component is provided on the main delivery pipeline, and the air source pressure detection component is used to detect the air source pressure value in the main delivery pipeline. The air source pressure detection component and the control component are electrically connected, and the control component is used to control the opening and closing state of each sampling head according to the air source pressure value and the pressure detection value of each pressure detection component.

[0009] In another possible implementation, the backflush assembly, sample storage assembly and reflux assembly are all arranged at the bottom of the weighing chamber, the backflush assembly is arranged on the first side wall of the weighing chamber, and the sample storage assembly and reflux assembly are arranged on the opposite side wall of the first side wall of the weighing chamber.

[0010] In another possible implementation, the weighing assembly is disposed at the bottom of the weighing cavity, and a sealing ring is disposed between the weighing assembly and the side wall of the weighing cavity.

[0011] An embodiment of the present application also provides a method for conveying lithium iron phosphate powder that is convenient for detection and sampling. The method uses the above-mentioned lithium iron phosphate powder conveying device that is convenient for detection and sampling, and includes: obtaining lithium iron phosphate powder from the main conveying pipeline through a sampling head, and detecting the conveying material-gas ratio of the lithium iron phosphate powder through a conveying state detection component; when the conveying material-gas ratio is within a preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the sample storage component; when the conveying material-gas ratio is not within the preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the reflux component.

[0012] In another possible implementation, lithium iron phosphate powder is obtained from the main conveying pipeline through a sampling head, and the conveying material-gas ratio of the lithium iron phosphate powder is detected through a conveying state detection component, including: negative pressure suction is performed on the weighing chamber through a negative pressure component, and the negative pressure in the weighing chamber is detected through a negative pressure detection component; when the negative pressure value in the weighing chamber is reduced to a preset negative pressure value, the control component controls the sampling head to open and obtain lithium iron phosphate powder from the main conveying pipeline; when the negative pressure value in the weighing chamber is increased to a preset pressure value, the weighing component weighs the weight of the lithium iron phosphate powder in the weighing chamber, and the control component determines the conveying material-gas ratio according to the ratio of the weight of the lithium iron phosphate powder weighed by the weighing component and the gas weight determined by the volume of the weighing chamber.

[0013] In another possible implementation, when the conveying material-gas ratio is within a preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the sample storage component, including: when the conveying material-gas ratio is within the preset conveying material-gas ratio range, the control component controls the backflush component to convey the lithium iron phosphate powder in the weighing chamber to the sample storage component; when the conveying material-gas ratio is not within the preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the reflux component, including: when the conveying material-gas ratio is within the preset conveying material-gas ratio range, the control component controls the backflush component to convey the lithium iron phosphate powder in the weighing chamber to the reflux component, and the reflux component conveys the lithium iron phosphate powder to the main conveying pipeline.

[0014] In another possible implementation, the method further includes: when the negative pressure value in the weighing chamber rises to a preset pressure value, closing the channel between the sampling head and the main conveying pipeline.

[0015] In another possible implementation, the method also includes: obtaining the pressure detection value of each pressure detection component in time sequence, and when the fluctuation amplitude of the pressure detection value in time sequence is less than the preset fluctuation amplitude, opening the sampling head to start obtaining lithium iron phosphate powder from the main conveying pipeline; when the fluctuation amplitude of the pressure detection value in time sequence is greater than or equal to the preset fluctuation amplitude, closing the sampling head to stop obtaining lithium iron phosphate powder from the main conveying pipeline.

[0016] In another possible implementation, the method also includes: obtaining the gas source pressure value in the main conveying pipeline detected by the gas source pressure detection component, and when the pressure difference between the gas source pressure value and the pressure detection value of each pressure detection component is less than a preset pressure difference, opening the sampling head to start obtaining lithium iron phosphate powder from the main conveying pipeline; when the pressure difference between the gas source pressure value and the pressure detection value of each pressure detection component is greater than or equal to the preset pressure difference, closing the sampling head to stop obtaining lithium iron phosphate powder from the main conveying pipeline.

[0017] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0018] The embodiment of the present application provides a lithium iron phosphate powder conveying device that is convenient for detection and sampling, including: a main conveying pipeline, which is used to pneumatically convey lithium iron phosphate powder; multiple sampling components, each sampling component includes a sampling head, a conveying state detection component, a sample storage component and a reflux component, the sampling head of each sampling component is arranged on the main conveying pipeline, the sampling head is used to absorb lithium iron phosphate powder from the main conveying pipeline, the sampling head is controlled by an electromagnetic valve to control the opening and closing state, the conveying state detection component is used to detect the conveying material-gas ratio of the lithium iron phosphate powder, and the reflux component is used to convey the lithium iron phosphate powder to the main conveying pipeline; a control component, the control component is respectively controlled and connected with the sampling heads, conveying state detection components, sample storage components and reflux components of the multiple sampling components, when the conveying material-gas ratio is within the preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the sample storage component, when the conveying material-gas ratio is not within the preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the reflux component. In the embodiment of the present application, by detecting the conveying material-gas ratio in pneumatic conveying, when the conveying material-gas ratio is within a preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the sample storage component, thereby realizing the detection of the lithium iron phosphate powder in a stable conveying state, improving the accuracy of the detection of the lithium iron phosphate powder, and improving the convenience and accuracy of the detection sampling of the lithium iron phosphate powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 A schematic diagram of the structure of a lithium iron phosphate powder conveying device that is convenient for detection and sampling provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the structure of a conveying state detection component provided in an embodiment of the present application;

[0022] Figure 3 for Figure 2 A schematic diagram of the local structure of a conveying state detection component at A;

[0023] Figure 4 A schematic diagram of a control structure of a lithium iron phosphate powder conveying device that is convenient for detection and sampling provided in an embodiment of the present application;

[0024] Figure 5 A schematic flow chart of a lithium iron phosphate powder delivery method for convenient detection and sampling provided in an embodiment of the present application;

[0025] In the figure, 1. main conveying pipeline; 11. air source pressure detection component; 2. sampling component; 21. sampling head; 211. pressure detection component; 22. conveying state detection component; 221. weighing chamber; 222. negative pressure component; 223. negative pressure detection component; 224. weighing component; 224a. sealing ring; 225. backflush component; 23. sample storage component; 24. reflux component; 3. control component. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] It should be noted that when a component or structure is referred to as being "fixed to" or "disposed on" another component or structure, it may be directly on the other component or structure or indirectly on the other component or structure. When a component or structure is referred to as being "connected to" another component or structure, it may be directly connected to the other component or structure or indirectly connected to the other component or structure.

[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or a component or structure referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In the prior art, it is difficult to improve the convenience of sampling for lithium iron phosphate powder detection and ensure the reliability of the detection results.

[0031] Based on the above reasons, an embodiment of the present application provides a lithium iron phosphate powder conveying device that is easy to detect and sample, including: a main conveying pipeline, used to pneumatically convey lithium iron phosphate powder; multiple sampling components, each sampling component includes a sampling head, a conveying state detection component, a sample storage component and a reflux component, the sampling head of each sampling component is arranged on the main conveying pipeline, the sampling head is used to absorb lithium iron phosphate powder from the main conveying pipeline, the sampling head is controlled by an electromagnetic valve to control the opening and closing state, the conveying state detection component is used to detect the conveying material-gas ratio of the lithium iron phosphate powder, and the reflux component is used to convey the lithium iron phosphate powder to the main conveying pipeline; a control component, the control component is respectively controlled and connected with the sampling heads, conveying state detection components, sample storage components and reflux components of the multiple sampling components, when the conveying material-gas ratio is within the preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the sample storage component, when the conveying material-gas ratio is not within the preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the reflux component. In the embodiment of the present application, by detecting the conveying material-gas ratio in pneumatic conveying, when the conveying material-gas ratio is within a preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the sample storage component, thereby realizing the detection of the lithium iron phosphate powder in a stable conveying state, improving the accuracy of the detection of the lithium iron phosphate powder, and improving the convenience and accuracy of the detection sampling of the lithium iron phosphate powder.

[0032] In some scenarios, a lithium iron phosphate powder conveying device that is convenient for detection and sampling according to an embodiment of the present application can be applied to a device for pneumatically conveying lithium iron phosphate powder, which can improve the accuracy of detection and sampling of pneumatically conveyed lithium iron phosphate powder, and improve the convenience and accuracy of consistency detection of pneumatically conveyed lithium iron phosphate powder.

[0033] A lithium iron phosphate powder conveying device that is convenient for detection and sampling provided in an embodiment of the present application is described in detail below with reference to specific examples.

[0034] Figure 1 A schematic diagram of the structure of a lithium iron phosphate powder conveying device for convenient detection and sampling provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, a lithium iron phosphate powder conveying device that is convenient for detection and sampling in an embodiment of the present application includes a main conveying pipeline 1, multiple sampling components 2 and a control component 3. The main conveying pipeline 1, multiple sampling components 2 and the control component 3 cooperate with each other to complete the detection and sampling of lithium iron phosphate powder.

[0035] like Figure 1 As shown, when the main conveying pipeline 1 is in operation, the main conveying pipeline 1 is used to pneumatically convey lithium iron phosphate powder.

[0036] When the main conveying pipeline 1 is in use, an air pump and a silo can be set on the main conveying pipeline 1. The air pump is used to supply airflow to the main conveying pipeline 1, and the silo is used to contain lithium iron phosphate powder and supply lithium iron phosphate powder to the main conveying pipeline 1. After the lithium iron phosphate powder reaches a suspended state in the main conveying pipeline 1, the main conveying pipeline 1 can realize pneumatic conveying of the lithium iron phosphate powder.

[0037] like Figure 1 As shown, multiple sampling components 2, each sampling component 2 includes a sampling head 21, a conveying state detection component 22, a sample storage component 23 and a reflux component 24, the sampling head 21 of each sampling component 2 is arranged on the main conveying pipeline 1, the sampling head 21 is used to absorb lithium iron phosphate powder from the main conveying pipeline 1, the sampling head 21 is controlled by the electromagnetic valve to control the opening and closing state, the conveying state detection component 22 is used to detect the conveying material-gas ratio of the lithium iron phosphate powder, and the reflux component 24 is used to convey the lithium iron phosphate powder to the main conveying pipeline 1.

[0038] like Figure 1 As shown, a plurality of sampling assemblies 2 are used to obtain lithium iron phosphate powder samples from the main conveying pipeline 1 to implement detection sampling of the lithium iron phosphate powder.

[0039] like Figure 1As shown, each sampling component 2 includes a sampling head 21, a conveying status detection component 22, a sample storage component 23 and a reflux component 24. The sampling head 21 of each sampling component 2 is arranged on the main conveying pipeline 1. The sampling head 21 is used to absorb lithium iron phosphate powder from the main conveying pipeline 1, so that the sampling head 21 can obtain the lithium iron phosphate powder sample from the main conveying pipeline 1.

[0040] Exemplarily, the sampling head 21 can control the opening and closing state through a solenoid valve, and the sampling head 21 can control the sampling process of the lithium iron phosphate powder sample through the solenoid valve.

[0041] Exemplarily, the sampling head 21 may be a tubular structure, and the sampling head 21 of the tubular structure is connected to the main conveying pipeline 1 to sample the lithium iron phosphate powder in the main conveying pipeline 1 .

[0042] When working, the conveying state detection component 22 is used to detect the conveying material-gas ratio of the lithium iron phosphate powder, and then the detection sampling process of the lithium iron phosphate powder can be controlled according to the conveying material-gas ratio of the lithium iron phosphate powder.

[0043] When working, the reflux component 24 is used to transport the lithium iron phosphate powder to the main conveying pipeline 1. The reflux component 24 can return the lithium iron phosphate powder that does not meet the sampling requirements to the main conveying pipeline 1 to achieve the reflux of the lithium iron phosphate powder.

[0044] like Figure 1 As shown, the control component 3 in the embodiment of the present application is respectively controlled and connected with the sampling heads 21, the conveying state detection component 22, the sample storage component 23 and the reflux component 24 of the multiple sampling components 2. When the conveying material-gas ratio is within the preset conveying material-gas ratio range, the control component 3 controls the conveying state detection component 22 to convey the lithium iron phosphate powder to the sample storage component 23. When the conveying material-gas ratio is not within the preset conveying material-gas ratio range, the control component 3 controls the conveying state detection component 22 to convey the lithium iron phosphate powder to the reflux component 24.

[0045] Structurally, the control component 3 is respectively controlled and connected to the sampling heads 21, the conveying status detection components 22, the sample storage components 23 and the reflux components 24 of the multiple sampling components 2, so that the control component 3 can control the working states of the sampling heads 21, the conveying status detection components 22, the sample storage components 23 and the reflux components 24 of the multiple sampling components 2, respectively.

[0046] During operation, when the conveying material-gas ratio is within the preset conveying material-gas ratio range, it means that the lithium iron phosphate powder is in a relatively stable conveying state. At this time, the control component 3 can control the conveying state detection component 22 to convey the lithium iron phosphate powder to the sample storage component 23, so as to realize the detection and sampling of the lithium iron phosphate powder under a relatively stable conveying state.

[0047] During operation, when the conveying material-gas ratio is not within the preset conveying material-gas ratio range, it means that the lithium iron phosphate powder is not in a relatively stable conveying state. At this time, the control component 3 can control the conveying state detection component 22 to convey the lithium iron phosphate powder to the reflux component 24 to avoid detecting and sampling the lithium iron phosphate powder when the lithium iron phosphate powder is not in an unstable conveying state.

[0048] The beneficial effect brought about by the above-mentioned implementation method is that, since lithium battery manufacturers have high requirements for the consistency of lithium iron phosphate, the embodiment of the present application detects and samples the lithium iron phosphate powder when the lithium iron phosphate powder is in a relatively stable conveying state, thereby ensuring the credibility of the detection and sampling of the lithium iron phosphate powder and improving the consistency of the detection and sampling of the lithium iron phosphate.

[0049] The beneficial effect brought about by the above implementation method is that it can avoid testing and sampling the lithium iron phosphate powder when the lithium iron phosphate powder is not in a stable transportation state, thereby improving the consistency of testing and sampling of the lithium iron phosphate.

[0050] The beneficial effect brought about by the above-mentioned implementation method is that the reflux component can return the lithium iron phosphate powder to the main conveying pipeline when the lithium iron phosphate powder is not in an stable conveying state, thereby realizing the reflux of the lithium iron phosphate powder and improving the convenience of detecting and sampling the lithium iron phosphate powder.

[0051] In some implementations, the transport status detection component 22 includes a weighing chamber 221, a negative pressure component 222, a negative pressure detection component 223, a weighing component 224 and a back-blowing component 225. The sampling head 21 and the negative pressure component 222 are respectively connected to the weighing chamber 221. The negative pressure detection component 223 is used to test the pressure value in the weighing chamber 221. The weighing component 224 is used to weigh the lithium iron phosphate powder in the weighing chamber 221. The back-blowing component 225 is used to transport the lithium iron phosphate powder in the weighing chamber 221 to the sample storage component 23 or the reflux component 24.

[0052] Figure 2 A schematic diagram of the structure of a conveying state detection component provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, structurally, the conveying state detection component 22 includes a weighing chamber 221, a negative pressure component 222, a negative pressure detection component 223, a weighing component 224 and a backflush component 225. The weighing chamber 221 is used to accommodate lithium iron phosphate powder and serves as a chamber for material-gas ratio detection of the lithium iron phosphate powder. The weighing chamber 221 is a sealed structure.

[0053] Exemplarily, the weighing chamber 221 may be made of a sealed metal box.

[0054] like Figure 2As shown, the sampling head 21 and the negative pressure component 222 are respectively connected to the weighing chamber 221, so that the lithium iron phosphate powder sucked by the sampling head 21 from the main conveying pipeline 1 can be input into the weighing chamber 221. At the same time, the negative pressure component 222 is used to suck the weighing chamber 221 to form a negative pressure in the weighing chamber 221, so as to facilitate the suction of the lithium iron phosphate powder by the negative pressure in the weighing chamber 221.

[0055] When sampling lithium iron phosphate powder, since the particle size of lithium iron phosphate powder is relatively fine and the lithium iron phosphate powder is in a suspended state in the main conveying pipeline 1, the lithium iron phosphate powder is transported to the weighing chamber 221 through the negative pressure in the weighing chamber 221, which can facilitate sampling of the lithium iron phosphate powder and avoid affecting the conveying process in the main conveying pipeline 1.

[0056] Exemplarily, the negative pressure component 222 pumps the weighing chamber 221 to form a negative pressure in the weighing chamber 221 of -5Pa to -20Pa.

[0057] Exemplarily, the negative pressure component 222 may be a vacuum pump.

[0058] During operation, the negative pressure detection component 223 is used to test the pressure value in the weighing chamber 221 , and then when the negative pressure in the weighing chamber 221 reaches a preset negative pressure value, the lithium iron phosphate powder can be sucked from the main conveying pipeline 1 through the sampling head 21 .

[0059] During operation, the weighing component 224 is used to weigh the lithium iron phosphate powder in the weighing chamber 221, so as to calculate the weight of the lithium iron phosphate powder in the weighing chamber 221. At the same time, when the negative pressure value in the weighing chamber 221 is fixed, the weight of the gas in the weighing chamber 221 can be estimated, so as to conveniently calculate the material-gas ratio in the transportation of the lithium iron phosphate powder.

[0060] When working, the backflush component 225 is used to transport the lithium iron phosphate powder in the weighing chamber 221 to the sample storage component 23 or the reflux component 24. The sample storage component 23 is used to store samples that have passed the sampling process, and the reflux component 24 is used to transport samples that have failed the sampling process to the main conveying pipeline 1, so as to achieve sample storage or reflux of the lithium iron phosphate powder in the weighing chamber 221.

[0061] Exemplarily, the back-blowing component 225 can transport the lithium iron phosphate powder through airflow, and the back-blowing component 225 can be a fan.

[0062] Exemplarily, the reflux component 24 can transport the lithium iron phosphate powder to the main transport pipeline 1 through a pipeline.

[0063] Exemplarily, the sample storage component 23 may be a sealed container, and the backflush component 225 may blow the lithium iron phosphate powder into the sample storage component 23 through airflow, thereby preventing the lithium iron phosphate powder from leaking.

[0064] Exemplarily, the volume of the sample storage assembly 23 may be 50% to 80% of the volume of the weighing chamber 221 , so that the backflush assembly 225 can blow the lithium iron phosphate powder into the sample storage assembly 23 through airflow.

[0065] During operation, the process of sampling lithium iron phosphate powder can be as follows: closing the sampling head 21, the backflush component 225 and the reflux component 24, performing negative pressure suction on the weighing chamber 221 through the negative pressure component 222, and detecting the negative pressure value of the weighing chamber 221 through the negative pressure detection component 223; when the negative pressure value in the weighing chamber 221 reaches a preset negative pressure value, opening the sampling head 21, keeping the backflush component 225 and the reflux component 24 closed, and drawing the airflow and the lithium iron phosphate powder carried by the airflow from the main conveying pipe 1 through the sampling head 21. After the negative pressure value in the weighing chamber 221 is reduced to normal pressure, the sampling head 21 can be closed, and the lithium iron phosphate powder in the weighing chamber 221 can be weighed by the weighing component 224, and the material-gas ratio of the lithium iron phosphate powder in the weighing chamber 221 is calculated. When the material-gas ratio of the lithium iron phosphate powder meets the preset material-gas ratio of the lithium iron phosphate powder, the back-blowing component 225 can be opened to transport the lithium iron phosphate powder to the sample storage component 23. When the material-gas ratio of the lithium iron phosphate powder does not meet the preset material-gas ratio of the lithium iron phosphate powder, the back-blowing component 225 can be opened to transport the lithium iron phosphate powder to the main conveying pipeline 1 through the reflux component 24. After the lithium iron phosphate powder is discharged from the weighing chamber 221, the sampling head 21, the back-blowing component 225 and the reflux component 24 can be closed, and the weighing chamber 221 is again subjected to negative pressure suction through the negative pressure component 222 to carry out the next sampling cycle.

[0066] In some implementations, the negative pressure component 222, the negative pressure detection component 223, the weighing component 224 and the back-blowing component 225 are respectively connected to the control component 3, and the control component 3 is used to determine the conveying material-gas ratio based on the ratio of the weight of the lithium iron phosphate powder weighed by the weighing component 224 and the gas weight determined by the volume of the weighing chamber 221.

[0067] Figure 4 A schematic diagram of the control structure of a lithium iron phosphate powder conveying device that is convenient for detection and sampling is provided in an embodiment of the present application, such as Figure 4 As shown, in the control structure, the negative pressure component 222, the negative pressure detection component 223, the weighing component 224 and the back-blowing component 225 are respectively connected to the control component 3 so that the working states of the negative pressure component 222, the negative pressure detection component 223, the weighing component 224 and the back-blowing component 225 can be centrally controlled through the control component 3.

[0068] During operation, the control component 3 is used to determine the conveying material-gas ratio based on the ratio of the weight of the lithium iron phosphate powder weighed by the weighing component 224 and the gas weight determined by the volume of the weighing chamber 221, and then it can be judged whether the sampling process of the lithium iron phosphate powder in the weighing chamber 221 meets the requirements based on the conveying material-gas ratio.

[0069] The beneficial effect brought about by the above implementation method is that the lithium iron phosphate powder is transported to the weighing chamber by the negative pressure in the weighing chamber, the lithium iron phosphate powder can be conveniently sampled, and at the same time, the transportation process in the main conveying pipeline can be avoided from being affected.

[0070] The beneficial effect brought about by the above implementation method is that the weight of the lithium iron phosphate powder in the weighing chamber can be calculated, and when the negative pressure value in the weighing chamber is fixed, the weight of the gas in the weighing chamber can be estimated, thereby facilitating the calculation of the material-gas ratio in the transportation of the lithium iron phosphate powder.

[0071] The beneficial effect brought about by the above implementation method is that sampling the lithium iron phosphate powder by negative pressure suction can prevent the lithium iron phosphate powder from being affected by mechanical extrusion and changing its properties, thereby improving the accuracy of sampling the lithium iron phosphate powder.

[0072] In some implementations, multiple sampling components 2 are respectively arranged at different positions of the main conveying pipeline 1, and a pressure detection component 211 is provided on the sampling head 21 of each sampling component 2. Each pressure detection component 211 is electrically connected to the control component 3, and the control component 3 is used to control the opening and closing state of the sampling head 21 according to the pressure detection value of each pressure detection component 211.

[0073] like Figure 1 As shown, multiple sampling assemblies 2 are respectively arranged at different positions of the main conveying pipeline 1, so that the multiple sampling assemblies 2 can sample lithium iron phosphate powder at different positions of the main conveying pipeline 1, thereby improving the uniformity of sampling the lithium iron phosphate powder.

[0074] like Figure 1 As shown, a pressure detection component 211 is provided on the sampling head 21 of each sampling component 2, and each pressure detection component 211 is electrically connected to the control component 3. The control component 3 is used to control the opening and closing state of the sampling head 21 according to the pressure detection value of each pressure detection component 211, so that the sampling head 21 can sample the lithium iron phosphate powder when the pressure in the main conveying pipeline 1 is stable.

[0075] The beneficial effect brought about by the above implementation method is that multiple sampling components sample the lithium iron phosphate powder at different positions of the main conveying pipeline, thereby improving the uniformity of sampling the lithium iron phosphate powder.

[0076] The beneficial effect brought about by the above implementation is that the sampling head can sample the lithium iron phosphate powder when the pressure in the main conveying pipeline is stable, further improving the consistency of sampling the lithium iron phosphate powder at different times.

[0077] In some implementations, an air source pressure detection component 11 is provided on the main delivery pipeline 1, and the air source pressure detection component 11 is used to detect the air source pressure value in the main delivery pipeline 1. The air source pressure detection component 11 is electrically connected to the control component 3, and the control component 3 is used to control the opening and closing state of each sampling head 21 according to the air source pressure value and the pressure detection value of each pressure detection component 211.

[0078] like Figure 1 As shown, structurally, an air source pressure detection component 11 is provided on the main conveying pipeline 1, and the air source pressure detection component 11 is used to detect the air source pressure value in the main conveying pipeline 1. After detecting the air source pressure value in the main conveying pipeline 1, the air source pressure detection component 11 can control the sampling process of the lithium iron phosphate powder according to the overall air source pressure in the main conveying pipeline 1, thereby improving the control effect of the sampling process of the lithium iron phosphate powder.

[0079] Structurally, the air source pressure detection component 11 is electrically connected to the control component 3. The control component 3 is used to control the opening and closing state of each sampling head 21 according to the air source pressure value and the pressure detection value of each pressure detection component 211, so that the sampling head 21 can control the sampling process of the lithium iron phosphate powder according to the delivery pressure of the lithium iron phosphate powder.

[0080] The beneficial effect brought about by the above-mentioned implementation method is that the sampling process of lithium iron phosphate powder can be controlled according to the overall gas source pressure in the main conveying pipeline, thereby improving the control effect of the sampling process of lithium iron phosphate powder and further improving the consistency of lithium iron phosphate powder sampling.

[0081] In some implementations, the backflush assembly 225, the sample storage assembly 23, and the reflux assembly 24 are all disposed at the bottom of the weighing chamber 221, the backflush assembly 225 is disposed on the first side wall of the weighing chamber 221, and the sample storage assembly 23 and the reflux assembly 24 are disposed on the opposite side wall of the first side wall of the weighing chamber 221.

[0082] like Figure 2 As shown, the backflush assembly 225 , the sample storage assembly 23 and the reflux assembly 24 are all arranged at the bottom of the weighing chamber 221 , so that the backflush assembly 225 , the sample storage assembly 23 and the reflux assembly 24 can transport the lithium iron phosphate powder at the bottom of the weighing chamber 221 .

[0083] like Figure 2As shown, the backflush assembly 225 is disposed on the first side wall of the weighing chamber 221 , so that the backflush assembly 225 can purge the lithium iron phosphate powder from the first side wall of the weighing chamber 221 .

[0084] like Figure 2 As shown, the sample storage assembly 23 and the reflux assembly 24 are arranged on the opposite side wall of the first side wall of the weighing chamber 221, so that the sample storage assembly 23 and the reflux assembly 24 can collect lithium iron phosphate powder on the opposite side of the first side wall.

[0085] The beneficial effect brought about by the above-mentioned implementation method is that the backflush assembly, the sample storage assembly and the reflux assembly can transport the lithium iron phosphate powder at the bottom of the weighing chamber, the backflush assembly is arranged on the first side wall of the weighing chamber, and the sample storage assembly and the reflux assembly are arranged on the opposite side wall of the first side wall of the weighing chamber, which is convenient for transporting the lithium iron phosphate powder in the weighing chamber and improves the convenience of sampling the lithium iron phosphate powder.

[0086] In some implementations, the weighing assembly 224 is disposed at the bottom of the weighing cavity 221 , and a sealing ring 224 a is disposed between the weighing assembly 224 and the side wall of the weighing cavity 221 .

[0087] Figure 3 for Figure 2 A schematic diagram of the local structure of a conveying state detection component at A, such as Figure 3 As shown, the weighing assembly 224 is arranged at the bottom of the weighing cavity 221 , and a sealing ring 224 a is arranged between the weighing assembly 224 and the side wall of the weighing cavity 221 , and the sealing ring 224 a can seal the weighing assembly 224 and the weighing cavity 221 .

[0088] Exemplarily, the weighing component 224 may be a high-precision weighing scale.

[0089] The beneficial effect brought about by the above implementation method is that the weighing assembly and the weighing cavity can be sealed by the sealing ring, thereby avoiding the leakage of lithium iron phosphate powder between the weighing assembly and the weighing cavity.

[0090] Figure 5 A schematic diagram of a lithium iron phosphate powder delivery method for convenient detection and sampling provided in an embodiment of the present application is shown in FIG. Figure 5 As shown, an embodiment of the present application further provides a lithium iron phosphate powder conveying method that is convenient for detection and sampling. The method adopts any of the lithium iron phosphate powder conveying devices that are convenient for detection and sampling as described above. The method includes S110 to S120, and S110 to S120 are specifically described below.

[0091] S110 , obtaining lithium iron phosphate powder from the main conveying pipeline 1 through the sampling head 21 , and detecting the conveying material-to-gas ratio of the lithium iron phosphate powder through the conveying state detection component 22 .

[0092] When sampling lithium iron phosphate powder, the lithium iron phosphate powder can be obtained from the main conveying pipeline 1 through the sampling head 21, and the conveying material-gas ratio of the lithium iron phosphate powder can be detected through the conveying state detection component 22, and then the current lithium iron phosphate powder conveying state can be judged whether it is stable through the conveying material-gas ratio of the lithium iron phosphate powder, and then the lithium iron phosphate powder can be sampled when the lithium iron phosphate powder conveying state reaches stability.

[0093] S120. When the conveying material-gas ratio is within the preset conveying material-gas ratio range, the control component 3 controls the conveying state detection component 22 to convey the lithium iron phosphate powder to the sample storage component 23; when the conveying material-gas ratio is not within the preset conveying material-gas ratio range, the control component 3 controls the conveying state detection component 22 to convey the lithium iron phosphate powder to the reflux component 24.

[0094] During operation, when the conveying material-gas ratio is within the preset conveying material-gas ratio range, the control component 3 controls the conveying state detection component 22 to convey the lithium iron phosphate powder to the sample storage component 23, and then the lithium iron phosphate powder can be conveyed to the sample storage component 23. Subsequently, the sample storage component 23 can be removed to complete the sampling of the lithium iron phosphate powder.

[0095] During operation, when the conveying material-gas ratio is not within the preset conveying material-gas ratio range, the control component 3 controls the conveying state detection component 22 to convey the lithium iron phosphate powder to the reflux component 24, and then the lithium iron phosphate powder can be conveyed to the main conveying pipeline 1 through the reflux component 24.

[0096] Exemplarily, the preset conveying material-gas ratio range may be a conveying material-gas ratio range corresponding to the conveying material-gas ratio of lithium iron phosphate powder conveyed through the main conveying pipeline 1 .

[0097] The beneficial effect brought about by the above-mentioned implementation method is that the conveying state of lithium iron phosphate powder is judged by the material-gas ratio of the lithium iron phosphate powder, and the lithium iron phosphate powder is sampled when the conveying state of the lithium iron phosphate powder reaches stability, thereby improving the consistency of the sampling process of lithium iron phosphate powder sampling, improving the consistency of the results of lithium iron phosphate powder testing, and being able to meet the manufacturer's requirements for consistency testing of lithium iron phosphate powder in production.

[0098] In some implementations, in the above S110, lithium iron phosphate powder is obtained from the main conveying pipeline 1 through the sampling head 21, and the conveying material-gas ratio of the lithium iron phosphate powder is detected by the conveying state detection component 22, including S111 to S113, and S111 to S113 are specifically described below.

[0099] S111 , negative pressure suction is performed on the weighing chamber 221 through the negative pressure component 222 , and the negative pressure in the weighing chamber 221 is detected through the negative pressure detection component 223 .

[0100] Before sampling lithium iron phosphate powder, negative pressure suction can be performed on the weighing chamber 221 through the negative pressure component 222, and the negative pressure in the weighing chamber 221 can be detected by the negative pressure detection component 223, so as to facilitate reaching a certain negative pressure in the weighing chamber 221, and then the lithium iron phosphate powder can be directly sucked from the main conveying pipeline 1 through the negative pressure in the weighing chamber 221.

[0101] S112 , when the negative pressure value in the weighing chamber 221 drops to a preset negative pressure value, the control component 3 controls the sampling head 21 to open and obtain lithium iron phosphate powder from the main conveying pipeline 1 .

[0102] During operation, when the negative pressure value in the weighing chamber 221 drops to a preset negative pressure value, it indicates that the negative pressure in the weighing chamber 221 has reached the preset negative pressure value, and then the control component 3 can be used to control the sampling head 21 to open and obtain lithium iron phosphate powder from the main conveying pipeline 1, so that the lithium iron phosphate powder and gas can be sampled without leakage.

[0103] S113. When the negative pressure value in the weighing chamber 221 rises to a preset pressure value, the weighing component 224 weighs the weight of the lithium iron phosphate powder in the weighing chamber 221, and the control component 3 determines the conveying material-gas ratio according to the ratio of the weight of the lithium iron phosphate powder weighed by the weighing component 224 and the gas weight determined by the volume of the weighing chamber 221.

[0104] During operation, when the negative pressure value in the weighing chamber 221 rises to a preset pressure value, it indicates that the weighing chamber 221 has completed absorbing the airflow conveying the lithium iron phosphate powder, and then the weight of the lithium iron phosphate powder in the weighing chamber 221 can be weighed by the weighing component 224. The control component 3 determines the conveying material-gas ratio according to the ratio of the weight of the lithium iron phosphate powder weighed by the weighing component 224 and the gas weight determined by the volume of the weighing chamber 221.

[0105] Exemplarily, the preset pressure value may be a normal pressure value.

[0106] Exemplarily, when the weight of the gas is determined according to the volume of the weighing chamber 221 , the weight of the gas in the weighing chamber 221 may be determined according to the product of the volume of the weighing chamber 221 and the density of the conveying gas.

[0107] The beneficial effect brought by the above implementation is that the control component controls the sampling head to open and obtain lithium iron phosphate powder from the main conveying pipeline through negative pressure, so that the lithium iron phosphate powder and gas can be sampled without leakage.

[0108] The beneficial effect brought about by the above implementation method is that sampling the lithium iron phosphate powder by negative pressure suction can prevent the lithium iron phosphate powder from being affected by mechanical extrusion and changing its properties, thereby improving the accuracy of sampling the lithium iron phosphate powder.

[0109] In some implementations, in the above-mentioned S120, when the conveying material-gas ratio is within a preset conveying material-gas ratio range, the control component 3 controls the conveying state detection component 22 to convey the lithium iron phosphate powder to the sample storage component 23, including: when the conveying material-gas ratio is within a preset conveying material-gas ratio range, the control component 3 controls the backflush component 225 to convey the lithium iron phosphate powder in the weighing chamber 221 to the sample storage component 23.

[0110] During operation, when the conveying material-gas ratio is within the preset conveying material-gas ratio range, the backflush component 225 conveys the lithium iron phosphate powder in the weighing chamber 221 to the sample storage component 23. The backflush component 225 conveys the lithium iron phosphate powder in the weighing chamber 221 to the sample storage component 23 through airflow, so as to facilitate the collection of the lithium iron phosphate powder in the weighing chamber 221.

[0111] In some implementations, in the above-mentioned S120, when the conveying material-gas ratio is not within the preset conveying material-gas ratio range, the control component 3 controls the conveying state detection component 22 to convey the lithium iron phosphate powder to the reflux component 24, including: when the conveying material-gas ratio is within the preset conveying material-gas ratio range, the control component 3 controls the backflush component 225 to convey the lithium iron phosphate powder in the weighing chamber 221 to the reflux component 24, and the reflux component 24 conveys the lithium iron phosphate powder to the main conveying pipeline 1.

[0112] During operation, when the conveying material-gas ratio is within the preset conveying material-gas ratio range, the backflush component 225 conveys the lithium iron phosphate powder in the weighing chamber 221 to the reflux component 24, and the reflux component 24 conveys the lithium iron phosphate powder to the main conveying pipeline 1, thereby facilitating the conveying of the lithium iron phosphate powder that does not meet the sampling conditions to the main conveying pipeline 1, thereby realizing the reflux of the lithium iron phosphate powder.

[0113] The beneficial effect brought about by the above implementation method is that it is easy to implement the sampling, storage and reflux of lithium iron phosphate powder, and it is easy to transport the lithium iron phosphate powder without leakage, thereby improving the reliability of sampling the lithium iron phosphate powder.

[0114] In some implementations, the above method further includes: when the negative pressure value in the weighing chamber 221 increases to a preset pressure value, closing the channel between the sampling head 21 and the main conveying pipeline 1 .

[0115] During operation, when the negative pressure value in the weighing chamber 221 rises to a preset pressure value, the channel between the sampling head 21 and the main conveying pipeline 1 is closed, so that the lithium iron phosphate powder can be prevented from continuing to enter the weighing chamber 221 from the main conveying pipeline 1 after sampling from the main conveying pipeline 1 is stopped, thereby improving the effect of sampling the lithium iron phosphate powder.

[0116] The beneficial effect brought about by the above implementation is that it can prevent the lithium iron phosphate powder from continuing to enter the weighing chamber from the main conveying pipeline after sampling from the main conveying pipeline is stopped, thereby improving the stability and reliability of the sampling process.

[0117] In some implementations, the method further includes: obtaining a pressure detection value of each pressure detection component 211 in a time sequence, and when the fluctuation amplitude of the pressure detection value in the time sequence is less than a preset fluctuation amplitude, opening the sampling head 21 to start obtaining lithium iron phosphate powder from the main delivery pipeline 1. When the fluctuation amplitude of the pressure detection value in the time sequence is greater than or equal to the preset fluctuation amplitude, closing the sampling head 21 to stop obtaining lithium iron phosphate powder from the main delivery pipeline 1.

[0118] When sampling lithium iron phosphate powder, the pressure detection value of each pressure detection component 211 in time sequence can be obtained, and the sampling process of lithium iron phosphate powder can be controlled by the pressure detection value in time sequence.

[0119] During operation, when the fluctuation amplitude of the pressure detection value in the time sequence is less than the preset fluctuation amplitude, it indicates that the main conveying pipeline 1 is relatively stable in conveying lithium iron phosphate powder, and the sampling head 21 can be opened to start obtaining lithium iron phosphate powder from the main conveying pipeline 1.

[0120] During operation, when the fluctuation amplitude of the pressure detection value in the timing is greater than or equal to the preset fluctuation amplitude, it means that the process of the main conveying pipeline 1 conveying lithium iron phosphate powder is not stable enough, and the sampling head 21 can be closed to stop obtaining lithium iron phosphate powder from the main conveying pipeline 1.

[0121] Exemplarily, when determining the fluctuation amplitude of the pressure detection value in the time series, the variance value of the pressure detection value in the time series may be determined as the fluctuation amplitude of the pressure detection value in the time series.

[0122] The beneficial effect brought about by the above implementation method is that the process of conveying lithium iron phosphate powder is relatively stable, and the sampling head can be opened to start obtaining lithium iron phosphate powder from the main conveying pipeline, further improving the consistency of sampling of lithium iron phosphate powder.

[0123] In some implementations, the above method further includes: obtaining the gas source pressure value in the main delivery pipeline 1 detected by the gas source pressure detection component 11, and when the pressure difference between the gas source pressure value and the pressure detection value of each pressure detection component 211 is less than the preset pressure difference, opening the sampling head 21 to start obtaining lithium iron phosphate powder from the main delivery pipeline 1. When the pressure difference between the gas source pressure value and the pressure detection value of each pressure detection component 211 is greater than or equal to the preset pressure difference, closing the sampling head 21 to stop obtaining lithium iron phosphate powder from the main delivery pipeline 1.

[0124] During the process of conveying lithium iron phosphate powder, a pressure drop will be generated during the conveying process of lithium iron phosphate powder. When the pressure drop caused by the conveying process of lithium iron phosphate powder is unstable, it indicates that the process of conveying lithium iron phosphate powder is not stable enough.

[0125] During operation, the gas source pressure value in the main conveying pipeline 1 detected by the gas source pressure detection component 11 can be obtained. When the pressure difference between the gas source pressure value and the pressure detection value of each pressure detection component 211 is less than the preset pressure difference, it means that the pressure drop at the pressure detection component 211 is within a reasonable range, and then the sampling head 21 can be opened to start obtaining lithium iron phosphate powder from the main conveying pipeline 1 to achieve sampling of lithium iron phosphate powder.

[0126] Exemplarily, the preset pressure difference value may be determined according to the position corresponding to each pressure detection component 211 .

[0127] During operation, when the pressure difference between the gas source pressure value and the pressure detection value of each pressure detection component 211 is greater than or equal to the preset pressure difference, it means that the pressure drop at the pressure detection component 211 is not within a reasonable range, and the sampling head 21 can be closed to stop obtaining lithium iron phosphate powder from the main conveying pipeline 1 to avoid sampling lithium iron phosphate powder when the conveying process of lithium iron phosphate powder is unstable.

[0128] The beneficial effect brought about by the above implementation method is that when the pressure drop caused by the transportation process of the lithium iron phosphate powder is within a reasonable range, the lithium iron phosphate powder is sampled, which further improves the consistency of the sampling of the lithium iron phosphate powder.

[0129] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A lithium iron phosphate powder conveying device that is convenient for detection and sampling, characterized in that: include: A main conveying pipeline for pneumatically conveying lithium iron phosphate powder; Multiple sampling components, each sampling component includes a sampling head, a conveying state detection component, a sample storage component and a reflux component. The sampling head of each sampling component is arranged on the main conveying pipeline, the sampling head is used to absorb lithium iron phosphate powder from the main conveying pipeline, the sampling head is controlled by the electromagnetic valve to control the opening and closing state, the conveying state detection component is used to detect the conveying material-gas ratio of the lithium iron phosphate powder, and the reflux component is used to convey the lithium iron phosphate powder to the main conveying pipeline; A control component is respectively controlled and connected with the sampling heads, conveying state detection components, sample storage components and reflux components of multiple sampling components. When the conveying material-gas ratio is within a preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the sample storage component. When the conveying material-gas ratio is not within the preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the reflux component.

2. The lithium iron phosphate powder conveying device according to claim 1, characterized in that: The conveying state detection component includes a weighing chamber, a negative pressure component, a negative pressure detection component, a weighing component and a back-blowing component. The sampling head and the negative pressure component are respectively connected to the weighing chamber. The negative pressure detection component is used to test the pressure value in the weighing chamber. The weighing component is used to weigh the lithium iron phosphate powder in the weighing chamber. The back-blowing component is used to transport the lithium iron phosphate powder in the weighing chamber to the sample storage component or the reflux component. The negative pressure component, negative pressure detection component, weighing component and backflush component are respectively connected to the control component for controlling the material-gas ratio according to the ratio of the weight of the lithium iron phosphate powder weighed by the weighing component and the gas weight determined by the volume of the weighing chamber.

3. The lithium iron phosphate powder conveying device according to claim 2, characterized in that: Multiple sampling components are respectively arranged at different positions of the main conveying pipeline. A pressure detection component is provided on the sampling head of each sampling component. Each pressure detection component is electrically connected to the control component. The control component is used to control the opening and closing state of the sampling head according to the pressure detection value of each pressure detection component.

4. The lithium iron phosphate powder conveying device according to claim 3, characterized in that: An air source pressure detection component is provided on the main delivery pipeline, and the air source pressure detection component is used to detect the air source pressure value in the main delivery pipeline. The air source pressure detection component and the control component are electrically connected, and the control component is used to control the opening and closing state of each sampling head according to the air source pressure value and the pressure detection value of each pressure detection component.

5. The lithium iron phosphate powder conveying device according to claim 4, characterized in that: The backflush assembly, sample storage assembly and reflux assembly are all arranged at the bottom of the weighing chamber, the backflush assembly is arranged on the first side wall of the weighing chamber, and the sample storage assembly and reflux assembly are arranged on the opposite side wall of the first side wall of the weighing chamber.

6. The lithium iron phosphate powder conveying device according to claim 5, characterized in that: The weighing assembly is arranged at the bottom of the weighing cavity, and a sealing ring is arranged between the weighing assembly and the side wall of the weighing cavity.

7. A lithium iron phosphate powder conveying method that is convenient for detection and sampling, characterized in that: The lithium iron phosphate powder conveying device for facilitating detection and sampling according to any one of claims 1 to 6 is used, and the method comprises: Obtain lithium iron phosphate powder from the main conveying pipeline through a sampling head, and detect the conveying material-gas ratio of the lithium iron phosphate powder through a conveying state detection component; When the conveying material-gas ratio is within the preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the sample storage component; when the conveying material-gas ratio is not within the preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the reflux component.

8. The lithium iron phosphate powder conveying method according to claim 7, characterized in that: The lithium iron phosphate powder is obtained from the main conveying pipeline through the sampling head, and the conveying material-gas ratio of the lithium iron phosphate powder is detected by the conveying state detection component, including: The negative pressure component is used to perform negative pressure suction on the weighing chamber, and the negative pressure in the weighing chamber is detected by the negative pressure detection component; When the negative pressure value in the weighing chamber drops to a preset negative pressure value, the control component controls the sampling head to open and obtain lithium iron phosphate powder from the main conveying pipeline; When the negative pressure in the weighing chamber rises to a preset pressure value, the weighing component weighs the lithium iron phosphate powder in the weighing chamber, and the control component determines the conveying material-gas ratio based on the ratio of the weight of the lithium iron phosphate powder weighed by the weighing component and the gas weight determined by the volume of the weighing chamber.

9. The lithium iron phosphate powder conveying method according to claim 8, characterized in that: When the conveying material-gas ratio is within the preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the sample storage component, including: When the conveying material-gas ratio is within the preset conveying material-gas ratio range, the control component controls the backflush component to convey the lithium iron phosphate powder in the weighing chamber to the sample storage component; When the conveying material-gas ratio is not within the preset conveying material-gas ratio range, the control component controls the conveying state detection component to convey the lithium iron phosphate powder to the reflux component, including: When the conveying material-gas ratio is within the preset conveying material-gas ratio range, the control component controls the backflush component to convey the lithium iron phosphate powder in the weighing chamber to the reflux component, and the reflux component conveys the lithium iron phosphate powder to the main conveying pipeline.

10. The lithium iron phosphate powder conveying method according to claim 9, characterized in that: The method further comprises: When the negative pressure value in the weighing chamber rises to a preset pressure value, the passage between the sampling head and the main conveying pipeline is closed.

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