Multi-component material delivery control valve set and delivery method

Abstract

The application belongs to the technical field of winding device manufacturing, and particularly relates to a multi-component material conveying control valve group and a conveying method, which comprises an input pipe, an opening selector, a metering valve, a switching valve, a flow valve, a control system and a weigher. One input pipe is connected with the input end of one flow valve. The opening selector is provided with a plurality of input ports and one output port. Each input port is connected with the output end of one flow valve. The output port is connected with the input end of the switching valve. The output end of the switching valve is connected with the output pipe and the metering valve. The metering valve is connected with the input end of the control system. The output end of the control system is connected with the opening selector, the switching valve and the flow valve. The output end of the output pipe is connected with the material input end of the weigher. The signal output end of the weigher is connected with the signal input end of the control system. The problem of low accuracy of the existing multi-component material conveying control valve group is solved.

Description

Technical Field

[0001] This application belongs to the field of valve assembly manufacturing technology, specifically a multi-component material conveying control valve assembly and conveying method. Background Technology

[0002] In traditional negative pressure material conveying processes, materials are typically conveyed directly into the storage silo under negative pressure using a negative pressure Roots blower valve assembly, followed by metering and mixing. This method, employing a single valve assembly with independent piping, results in very low feeding accuracy and fails to achieve precise feeding functionality. Summary of the Invention

[0003] The purpose of this application is to address the shortcomings of existing technologies by designing a multi-component material conveying control valve assembly and conveying method that uses a control system to control a metering valve, flow valve, open selector, and weighing device. This method allows the flow valve to be calibrated by the control system before use, and then the metering valve and weighing device to slowly add material as the material conveying process is about to be completed. This solves the problem of low feeding accuracy in existing multi-component material conveying control valve assemblies.

[0004] The technical solution adopted in this application is as follows:

[0005] A multi-component material conveying control valve assembly includes an input pipe, an opening selector, a metering valve, a switching valve, a flow valve, a control system, and a weighing device. Each input pipe is connected to the input end of one flow valve. The opening selector has several input ports and one output port. Each input port is connected to the output end of one flow valve. The output port is connected to the input end of the switching valve. The output end of the switching valve is connected to both the output pipe and the metering valve. The metering valve is signal-connected to the input end of the control system. The output end of the control system is signal-connected to the opening selector, the switching valve, and the flow valve. The output end of the output pipe is connected to the material input end of the weighing device. The signal output end of the weighing device is signal-connected to the signal input end of the control system.

[0006] Preferably, the opening selector includes a plurality of switching valves, each of which has an input port at its input end, and the outputs of all the switching valves are combined into an output port. Each of the switching valves is signal-connected to the signal output of the control system.

[0007] Preferably, a plurality of the input ports are arranged longitudinally on the opening selector, and the output port is located at the lower end of the opening selector.

[0008] Preferably, the open selector includes a driver, a selector valve core, and a housing. A plurality of input ports are arranged axially on the housing. The housing contains a selector valve core that cooperates with the input ports. A servo motor is provided at the upper end of the housing. The output end of the driver is connected to the selector valve core. The lower end of the housing has the output port.

[0009] Preferably, the inner cross-section of the housing is circular, the selector valve core includes a rotating shaft, the driver is a servo motor, the rotating shaft is coaxially rotatable within the housing, the output shaft of the servo motor is drively connected to the rotating shaft, and an arc-shaped blocking plate is provided axially on the circumferential surface of the rotating shaft for each input port. The outer arc surface of the arc-shaped blocking plate is slidably connected to the inner circumferential surface of the housing, and the inner arc surface of each arc-shaped blocking plate is coaxially and fixedly connected to the circumferential surface of the rotating shaft; the number of arc-shaped blocking plates is N, where N is a natural number, and the central angle of the Mth arc-shaped blocking plate from top to bottom within the housing is . M is a natural number less than or equal to N. The starting edges of the central angles of all the arc-shaped blocking plates on the rotating shaft are located in the same plane A. The plane A is parallel to the axis of the housing and is coplanar. The signal input terminal of the servo motor is connected to the output terminal of the control system.

[0010] Preferably, N equals 5.

[0011] A method for conveying multi-component materials includes a multi-component material conveying control valve assembly with an open selector comprising a driver, a selector valve core, and a housing, and further includes the following steps:

[0012] 1) Calculate the total amount of each material required based on the preset material types, and then calculate the flow rate of each material into the housing when all materials are delivered at the same time. Connect the input end of each material source to the input pipe from top to bottom on the housing, so that each material can be input into the housing through one input pipe. Then close all the flow valves and ensure that the output end of each flow valve is not blocked by the arc-shaped blocking plate.

[0013] 2) The control system opens the first flow valve from top to bottom on the housing; at the same time, the control system switches the switching valve to a state where the metering valve is connected to the inside of the housing, so that the flow rate of the first flow valve from top to bottom on the housing is calibrated through the metering valve;

[0014] 3) The control system adjusts the flow valve in step 2) based on the amount of material sucked in by the metering valve as the measurement standard until the flow rate of the flow valve in step 2) meets the preset requirements. Then, the switching valve is switched to the state where the inside of the housing is connected to the output pipe, thereby clearing the remaining first material in the metering valve. Then, the switching valve is switched to the state where the metering valve is connected to the inside of the housing.

[0015] 4) The servo motor is controlled by the control system to drive the shaft to rotate 60 degrees. Then, the second flow valve on the housing from top to bottom is opened by the control system. The valve of the second flow valve on the housing from top to bottom is adjusted by the control system according to the amount of material sucked in by the metering valve as the measurement standard until the flow rate of the second flow valve on the housing from top to bottom meets the preset requirements. Then, the switching valve is switched to the state where the inside of the housing is connected to the output pipe, thereby clearing the remaining first material in the metering valve. Then, the switching valve is switched to the state where the metering valve is connected to the inside of the housing.

[0016] 5) After step 4) is completed, the servo motor is controlled by the control system to drive the rotating shaft to rotate 60 degrees. Then, the third flow valve on the housing from top to bottom is opened by the control system. The valve of the third flow valve on the housing from top to bottom is adjusted by the control system according to the amount of material sucked in by the metering valve as the measurement standard until the flow rate of the third flow valve on the housing from top to bottom meets the preset requirements. Then, the switching valve is switched to the state where the inside of the housing is connected to the output pipe, thereby clearing the remaining first material in the metering valve. Then, the switching valve is switched to the state where the metering valve is connected to the inside of the housing.

[0017] 6) After step 5) is completed, the servo motor is controlled by the control system to drive the rotating shaft to rotate 60 degrees. Then, the fourth flow valve on the housing from top to bottom is opened by the control system. The valve of the fourth flow valve on the housing from top to bottom is adjusted by the control system according to the amount of material sucked in by the metering valve as the measurement standard until the flow rate of the fourth flow valve on the housing from top to bottom meets the preset requirements. Then, the switching valve is switched to the state where the inside of the housing is connected to the output pipe, thereby clearing the remaining first material in the metering valve. Then, the switching valve is switched to the state where the metering valve is connected to the inside of the housing.

[0018] 7) After step 6) is completed, the servo motor is controlled by the control system to drive the rotating shaft to rotate 60 degrees. Then, the fifth flow valve from top to bottom on the housing is opened by the control system. The valve of the fifth flow valve from top to bottom on the housing is adjusted by the control system according to the amount of material sucked in by the metering valve as the measurement standard until the flow rate of the fifth flow valve from top to bottom on the housing meets the preset requirements. Then, the switching valve is switched to the state where the inside of the housing is connected to the output pipe, thereby clearing the remaining first material in the metering valve. Then, the switching valve is switched to the state where the metering valve is connected to the inside of the housing.

[0019] 8) Then, the servo motor is controlled by the control system to drive the shaft to continue rotating 60 degrees. At this time, the output ends of the five flow valves simultaneously convey materials into the housing, and then the materials in the housing are conveyed to the weighing device from the output pipe.

[0020] 9) When the difference between the amount of material displayed on the weighing device and the preset value is less than or equal to the range of the metering valve, the servo motor is controlled by the control system to drive the shaft in step 8) to rotate 60 degrees in the opposite direction, so that all input pipes are blocked by the arc-shaped blocking plate; then the material is slowly added through the metering valve until the amount of the first material reaches the preset value.

[0021] 10) Switch the switching valve to the state where the metering valve is connected to the inside of the housing, and then control the servo motor through the control system to drive the rotating shaft in step 9) to rotate 60 degrees in the opposite direction; at this time, the fifth flow valve from top to bottom on the housing opens and the material flowing out of the fifth flow valve from top to bottom on the housing enters the metering valve. The metering valve slowly injects the material from the fifth flow valve from top to bottom on the housing into the weighing device according to the display of the weighing device, and finally discharges the remaining material in the metering valve out of the weighing device.

[0022] 11) After step 10), the servo motor is controlled by the control system to drive the rotating shaft in step 10) to rotate 60 degrees in the opposite direction; at this time, the fourth flow valve from top to bottom on the housing opens and the material flowing out of the fourth flow valve from top to bottom on the housing enters the metering valve. The metering valve slowly injects the material from the fourth flow valve from top to bottom on the housing into the weighing device according to the display of the weighing device. Finally, the remaining material in the metering valve is discharged out of the weighing device.

[0023] 12) After step 11), the servo motor is controlled by the control system to drive the rotating shaft in step 11) to rotate 60 degrees in the opposite direction; at this time, the third flow valve on the housing from top to bottom opens and the material flowing out of the third flow valve on the housing from top to bottom enters the metering valve. The metering valve slowly injects the material in the third flow valve on the housing from top to bottom into the weighing device according to the display of the weighing device. Finally, the remaining material in the metering valve is discharged out of the weighing device.

[0024] 13) After step 12), the servo motor is controlled by the control system to drive the rotating shaft in step 12) to rotate 60 degrees in the opposite direction; at this time, the second flow valve on the housing from top to bottom opens and the material flowing out of the second flow valve on the housing from top to bottom enters the metering valve. The metering valve slowly injects the material in the second flow valve on the housing from top to bottom into the weighing device according to the display of the weighing device. Finally, the remaining material in the metering valve is discharged out of the weighing device.

[0025] 14) After step 13), the servo motor is controlled by the control system to drive the rotating shaft in step 13) to rotate 60 degrees in the opposite direction. At this time, the first flow valve on the housing from top to bottom opens and the material flowing out of the first flow valve on the housing from top to bottom enters the metering valve. The metering valve slowly injects the material in the first flow valve on the housing from top to bottom into the weighing device according to the display of the weighing device. Finally, the servo motor is controlled by the control system to drive the rotating shaft to rotate 60 degrees in the opposite direction, and then all the flow valves are closed, and the remaining material in the metering valve is discharged outside the weighing device.

[0026] The beneficial effects of this application are as follows:

[0027] 1. This application adopts a control system to control the metering valve, flow valve, open selector, and weighing device, and designs a multi-component material conveying control valve group and conveying method. The flow valve can be calibrated by the control system before use, and then the metering valve and weighing device can be controlled by the control system during the process when the material conveying is about to be completed.

[0028] 2. This application uses a driver to control the selector valve core to select the input pipe, thereby achieving precise individual feeding of each material. Compared with the previous embodiment, this reduces the area occupied by this application, improves space utilization, and facilitates maintenance and management during subsequent use.

[0029] 3. In this application, after each flow valve is calibrated, the switching valve is switched to the state where the inside of the housing is connected to the output pipe, so that the remaining material in the metering valve is cleared out of the weighing device. This facilitates the calibration of the next flow valve and achieves the accuracy of the calibration. Then the switching valve is switched to the state where the metering valve is connected to the inside of the housing to prepare for the calibration of the next flow valve. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the open-end selector using design method two in this application;

[0031] Figure 2 for Figure 1 Exploded view in the image;

[0032] Figure 3 A schematic diagram showing the arrangement of the arc-shaped blocking plates on the rotating shaft;

[0033] Figure 4 This is a schematic diagram of the structure of the open-end selector using design method one in this application.

[0034] The components are: 1. Input pipe; 2. Metering valve; 3. Switching valve; 4. Flow valve; 5. Weighing device; 6. Output pipe; 7. Housing; 8. Rotating shaft; 9. Servo motor; 10. Arc-shaped blocking plate; 12. Support. Detailed Implementation

[0035] See Figure 1-4 A multi-component material conveying control valve assembly includes an input pipe 1, an opening selector, a metering valve 2, a switching valve 3, a flow valve 4, a control system, and a weighing device 5. One input pipe 1 is connected to the input end of one flow valve 4. The opening selector has several input ports and one output port. Each input port is connected to the output end of one flow valve 4. The output port is connected to the input end of the switching valve 3. The output end of the switching valve 3 is connected to an output pipe 6 and the metering valve 2. The metering valve 2 is signal-connected to the input end of the control system. The output end of the control system is signal-connected to the opening selector, the switching valve 3, and the flow valve 4. The output end of the output pipe is connected to the material input end of the weighing device 5. The signal output end of the weighing device 5 is signal-connected to the signal input end of the control system.

[0036] In this embodiment, the flow valve 4 on each input pipe 1 controls the flow rate on that input pipe 1. The control system is mainly used to control the open-end selector, metering valve 2, switching valve 3, and flow valve 4 based on feedback from the weighing device 5 and metering valve 2. In operation, the program can be input into the control system. First, the flow valve 4 is calibrated using the metering valve 2. Then, when the material input is nearing completion, the open-end selector selects the input pipe 1 that matches the metering valve 2, achieving precise feeding of each material.

[0037] There are two design options for open-aperture selectors:

[0038] Method 1: For example Figure 4 As shown, the selector includes several switching valves 11. Each switching valve 11 has an input port at its input end, and the outputs of all the switching valves 11 are combined into an output port. Each switching valve 11 is signal-connected to the signal output terminal of the control system. In this configuration, the selection of the input pipe 1 is achieved by controlling the opening and closing of each switching valve 11 through the control system, thereby enabling precise feeding of each material.

[0039] As a preferred embodiment, a plurality of the input ports are arranged longitudinally on the aperture selector, and the output port is located at the lower end of the aperture selector.

[0040] Method 2: For example Figure 1-3 As shown, the open selector includes a driver, a selection valve core, and a housing 7. Several input ports are axially arranged on the housing 7. The housing 7 contains a selection valve core that mates with the input ports. A servo motor 9 is located at the upper end of the housing 7. The output end of the driver controls and connects to the selection valve core. The lower end of the housing 7 has an output port. With this design, the driver controls the selection valve core to select the input pipe 1, thereby achieving precise individual feeding of each material. Compared to the previous embodiment, this reduces the area occupied by this application, improves space utilization, and facilitates maintenance and management during subsequent use.

[0041] Based on the second method of the selector, as a preferred method, the inner cross-section of the housing 7 is circular, the selector valve core includes a rotating shaft 8, and the driver is a servo motor 9. The rotating shaft 8 is coaxially rotatably disposed within the housing 7, and the output shaft of the servo motor 9 is drively connected to the rotating shaft 8. An arc-shaped blocking plate 10 is axially positioned on the circumferential surface of the rotating shaft 8 corresponding to each input port. The outer arc surface of the arc-shaped blocking plate 10 is slidably connected to the inner circumferential surface of the housing 7, and the inner arc surface of each arc-shaped blocking plate 10 is coaxially and fixedly connected to the circumferential surface of the rotating shaft. The number of arc-shaped blocking plates 10 is N, where N is a natural number, and the central angle of the Mth arc-shaped blocking plate 10 from top to bottom within the housing 7 is _____. M is a natural number less than or equal to N. The starting edges of the central angles of all the arc-shaped blocking plates 10 located on the rotating shaft 8 are located in the same plane A. The plane A is parallel to the axis of the housing 7 and is coplanar. The signal input terminal of the servo motor 9 is connected to the output terminal of the control system.

[0042] Based on the second method of the aperture selector, as a preferred method, N is equal to 5.

[0043] A method for conveying multi-component materials, comprising using a multi-component material conveying control valve assembly in design mode two for an open selector, and further comprising the following steps:

[0044] 1) Calculate the total amount of each material required according to the preset material type, and then calculate the flow rate of each material into the housing 7 when all materials are delivered at the same time. Connect the input end of the input pipe 1 from top to bottom on the housing 7 to the material source of each material, so that each material can be input into the housing 7 through one input pipe 1. Then close all the flow valves 4 and ensure that the output end of each flow valve 4 is not blocked by the arc-shaped blocking plate 10.

[0045] 2) The control system opens the first flow valve 4 from top to bottom on the housing 7; at the same time, the control system switches the switching valve 3 to the state where the metering valve 2 is connected to the inside of the housing 7, so that the flow rate of the first flow valve 4 from top to bottom on the housing 7 is calibrated by the metering valve 2; during the calibration of the flow valve 4, the specific calibration steps are as follows: (1) When calibrating the first flow valve 4 from top to bottom on the housing 7, the control system first adjusts the first flow valve 4 from top to bottom on the housing 7 to the preset flow rate value, and then the material passing through the first flow valve 4 from top to bottom on the housing 7 for a period of time enters the metering valve 2; (2) The metering valve 2 transmits the volume information of the material passing through the first flow valve 4 from top to bottom on the housing 7 for a period of time to the control system, and the control system compares the volume information transmitted by the metering valve 2 with the preset value on the first flow valve 4 from top to bottom on the housing 7;

[0046] 3) The control system adjusts the flow valve 4 in step 2) based on the amount of material sucked in by the metering valve 2 as the measurement standard until the flow rate of the flow valve 4 in step 2) meets the preset requirements: If the volume information delivered by the metering valve 2 is less than the preset value on the first flow valve 4, the control system opens the valve of the first flow valve 4 on the housing 7 from top to bottom a little wider, and then continues to step (2) until the difference between the volume information delivered by the metering valve 2 and the preset value on the first flow valve 4 is within the error range; if the volume information delivered by the metering valve 2 is greater than the preset value on the first flow valve 4 on the housing 7 from top to bottom... If the preset value is not met, the control system will open the valve of the first flow valve 4 from top to bottom on the housing 7 a little smaller, and then continue to step (2) until the difference between the volume information delivered by the metering valve 2 and the preset value of the first flow valve 4 from top to bottom on the housing 7 is within the error range; the other flow valves 4 can be calibrated in the same way; then the switching valve 3 is switched to the state where the inside of the housing 7 is connected to the output pipe 6, so as to clear the remaining first material in the metering valve 2, which is convenient for calibrating the next flow valve 4; then the switching valve 3 is switched to the state where the metering valve 2 is connected to the inside of the housing 7, in preparation for calibrating the next flow valve 4;

[0047] 4) The servo motor 9 is controlled by the control system to drive the shaft 8 to rotate 60 degrees. The purpose is to block the output port of the calibrated flow valve 4. Then, the control system opens the second flow valve 4 from top to bottom on the housing 7. The control system then adjusts the valve of the second flow valve 4 from top to bottom on the housing 7 according to the amount of material sucked in by the metering valve 2 as the measurement standard until the flow rate of the second flow valve 4 from top to bottom on the housing 7 meets the preset requirements. Then, the switching valve 3 is switched to the state where the inside of the housing 7 is connected to the output pipe 6, thereby clearing the remaining first material in the metering valve 2. Then, the switching valve 3 is switched to the state where the metering valve 2 is connected to the inside of the housing 7.

[0048] 5) After step 4) is completed, the servo motor is controlled by the control system to drive the rotating shaft to rotate 60 degrees. Then, the third flow valve on the housing from top to bottom is opened by the control system. The valve of the third flow valve 4 on the housing 7 is adjusted by the control system according to the amount of material sucked in by the metering valve 2 as the measurement standard until the flow rate of the third flow valve 4 on the housing 7 meets the preset requirements. Then, the switching valve 3 is switched to the state where the inside of the housing 7 is connected to the output pipe 6, thereby clearing the remaining first material in the metering valve 2. Then, the switching valve 3 is switched to the state where the metering valve 2 is connected to the inside of the housing 7.

[0049] 6) After step 5) is completed, the servo motor is controlled by the control system to drive the shaft to rotate 60 degrees. Then, the fourth flow valve from top to bottom on the housing is opened by the control system. The valve of the fourth flow valve 4 from top to bottom on the housing 7 is adjusted by the control system according to the amount of material sucked in by the metering valve 2 as the measurement standard until the flow rate of the fourth flow valve 4 from top to bottom on the housing 7 meets the preset requirements. Then, the switching valve 3 is switched to the state where the inside of the housing 7 is connected to the output pipe 6, thereby clearing the remaining first material in the metering valve 2. Then, the switching valve 3 is switched to the state where the metering valve 2 is connected to the inside of the housing 7.

[0050] 7) After step 6) is completed, the servo motor is controlled by the control system to drive the rotating shaft to rotate 60 degrees. Then, the fifth flow valve from top to bottom on the housing is opened by the control system. The valve of the fifth flow valve 4 from top to bottom on the housing 7 is adjusted by the control system according to the amount of material sucked in by the metering valve 2 as the measurement standard until the flow rate of the fifth flow valve 4 from top to bottom on the housing 7 meets the preset requirements. Then, the switching valve 3 is switched to the state where the inside of the housing 7 is connected to the output pipe 6, thereby clearing the remaining first material in the metering valve 2. Then, the switching valve 3 is switched to the state where the metering valve 2 is connected to the inside of the housing 7. In this way, all five flow valves 4 are calibrated. The entire calibration process is automatically controlled by the control system.

[0051] 8) Then, the servo motor is controlled by the control system to drive the shaft to rotate another 60 degrees. At this time, the output ends of the five flow valves 4 simultaneously feed material into the housing 7, and then the material in the housing 7 is transported from the output pipe 6 to the weighing device 5. In this way, the calibrated flow valves 4, together with their respective input pipes 1, finally deliver the material to the weighing device 5 according to the preset requirements.

[0052] 9) When the difference between the amount of material displayed on the weighing device 5 and the preset value is less than or equal to the range of the metering valve, the servo motor 9 is controlled by the control system to drive the rotating shaft 8 in step 8) to rotate 60 degrees in the opposite direction, so that all input pipes 1 are blocked by the arc-shaped blocking plate 10; then, the material is slowly added through the metering valve 2 until the amount of the first material reaches the preset value; after most of the material has been conveyed, all input pipes 1 are blocked by the arc-shaped blocking plate 10 to prepare for precise feeding.

[0053] 10) Switch the switching valve 3 to the state where the metering valve 2 is connected to the inside of the housing 7. Then, control the servo motor 9 through the control system to drive the rotating shaft 8 in step 9 to rotate 60 degrees in the opposite direction. At this time, the fifth flow valve 4 from top to bottom on the housing 7 opens and the material flowing out of the fifth flow valve 4 from top to bottom on the housing 7 enters the metering valve 2. The metering valve 2 slowly injects the material from the fifth flow valve 4 from top to bottom on the housing 7 into the weighing device 5 according to the display of the weighing device 5. Finally, the remaining material in the metering valve 2 is discharged outside the weighing device 5. After this setting, precise feeding is carried out one by one from the fifth flow valve 4 from top to bottom on the housing 7.

[0054] 11) After step 10), the servo motor 9 is controlled by the control system to drive the rotating shaft 8 in step 10) to rotate 60 degrees in the opposite direction. At this time, the fourth flow valve 4 from top to bottom on the housing 7 is opened and the material flowing out of the fourth flow valve 4 from top to bottom on the housing 7 enters the metering valve 2. The metering valve 2 slowly injects the material from the fourth flow valve 4 from top to bottom on the housing 7 into the weighing device 5 according to the display of the weighing device 5. Finally, the remaining material in the metering valve 5 is discharged out of the weighing device 5.

[0055] 12) After step 11), the servo motor 9 is controlled by the control system to drive the rotating shaft 8 in step 11) to rotate 60 degrees in the opposite direction. At this time, the third flow valve 4 from top to bottom on the housing 7 is opened and the material flowing out of the third flow valve 4 from top to bottom on the housing 7 enters the metering valve 2. The metering valve 2 slowly injects the material from the third flow valve 4 from top to bottom on the housing 7 into the weighing device 5 according to the display of the weighing device 5. Finally, the remaining material in the metering valve 2 is discharged out of the weighing device 5.

[0056] 13) After step 12), the servo motor 9 is controlled by the control system to drive the rotating shaft 8 in step 12) to rotate 60 degrees in the opposite direction. At this time, the second flow valve 4 on the housing 7 from top to bottom opens and the material flowing out of the second flow valve 4 on the housing 7 from top to bottom enters the metering valve 2. The metering valve 2 slowly injects the material in the second flow valve 4 on the housing 7 from top to bottom into the weighing device 5 according to the display of the weighing device 5. Finally, the remaining material in the metering valve 2 is discharged out of the weighing device 5.

[0057] 14) After step 13), the control system controls the servo motor 9 to drive the rotating shaft 8 from step 13) to rotate 60 degrees in the opposite direction. At this time, the first flow valve 4 on the housing 7 from top to bottom opens, and the material flowing out of the first flow valve 4 on the housing 7 from top to bottom enters the metering valve 2. The metering valve 2 slowly injects the material from the first flow valve 4 on the housing 7 from top to bottom into the weighing device 5 according to the display of the weighing device 5. Finally, the control system controls the servo motor 9 to drive the rotating shaft 8 to rotate 60 degrees in the opposite direction, and then closes all the flow valves 4, discharging the remaining material in the metering valve 2 out of the weighing device 5. After these steps, all accurate feeding is achieved.

Claims

1. A multi-component material conveying control valve assembly, characterized in that, The system includes an input pipe (1), an opening selector, a metering valve (2), a switching valve (3), a flow valve (4), a control system, and a weighing device (5). One input pipe (1) is connected to the input end of one flow valve (4). The opening selector has several input ports and one output port. Each input port is connected to the output end of one flow valve (4). The output port is connected to the input end of the switching valve (3). The output end of the switching valve (3) is connected to the output pipe (6) and the metering valve (2). The metering valve (2) is connected to the input end of the control system. The output end of the control system is connected to the opening selector, the switching valve (3), and the flow valve (4). The output end of the output pipe is connected to the material input end of the weighing device (5). The signal output end of the weighing device (5) is connected to the signal input end of the control system. The opening selector includes several switching valves (11), each of which has an input port at its input end and all of which have output ports at their output ends. Each of the switching valves (11) is signal-connected to the signal output end of the control system. A plurality of the input ports are arranged longitudinally on the aperture selector, and the output port is located at the lower end of the aperture selector; The open selector includes a driver, a selector valve core, and a housing (7). Several input ports are arranged axially on the housing (7). The housing (7) contains a selector valve core that cooperates with the input ports. A servo motor (9) is provided at the upper end of the housing (7). The output end of the driver is connected to the selector valve core. The lower end of the housing (7) contains the output port. The inner cross-section of the housing (7) is circular. The selector valve core includes a rotating shaft (8). The driver is a servo motor (9). The rotating shaft (8) is coaxially rotatably disposed inside the housing (7). The output shaft of the servo motor (9) is connected to the rotating shaft (8). An arc-shaped blocking plate (10) is provided on the circumferential surface of the rotating shaft (8) corresponding to each input port. The outer arc surface of the arc-shaped blocking plate (10) is slidably connected to the inner circumferential surface of the housing (7). The inner arc surface of each arc-shaped blocking plate (10) is coaxially fixedly connected to the circumferential surface of the rotating shaft. The number of arc-shaped blocking plates (10) is N, where N is a natural number. The central angle of the Mth arc-shaped blocking plate (10) from top to bottom inside the housing (7) is _____. M is a natural number less than or equal to N. The starting edges of the central angles of all the arc-shaped blocking plates (10) located on the rotating shaft (8) are located in the same plane A. The plane A is parallel to the axis of the housing (7) and is coplanar. The signal input terminal of the servo motor (9) is connected to the output terminal of the control system.

2. The multi-component material conveying control valve assembly according to claim 1, characterized in that, The value of N is 5.

3. A method for conveying multi-component materials, characterized in that, The multi-component material conveying control valve assembly according to claim 2 further includes the following steps: 1) Calculate the total amount of each material required according to the preset material type, and then calculate the flow rate of each material into the housing (7) when all materials are delivered at the same time. Connect the input end of the input pipe (1) from top to bottom on the housing (7) to the material source of each material, so that each material can be input into the housing (7) through one input pipe (1). Then close all the flow valves (4) and ensure that the output end of each flow valve (4) is not blocked by the arc-shaped blocking plate (10). 2) The first flow valve (4) on the housing (7) from top to bottom is opened by the control system; at the same time, the switching valve (3) is switched to the state where the metering valve (2) is connected to the inside of the housing (7) by the control system, so that the flow rate of the first flow valve (4) on the housing (7) from top to bottom is calibrated by the metering valve (2); 3) The control system adjusts the flow valve (4) in step 2) according to the amount of material sucked in by the metering valve (2) as the measurement standard until the flow rate of the flow valve (4) in step 2) meets the preset requirements. Then, the switching valve (3) is switched to the state where the inside of the housing (7) is connected to the output pipe (6), thereby clearing the remaining first material in the metering valve (2). Then, the switching valve (3) is switched to the state where the metering valve (2) is connected to the inside of the housing (7). 4) Control the servo motor (9) through the control system to drive the shaft (8) to rotate 60 degrees, and then open the second flow valve (4) from top to bottom on the housing (7) through the control system. Then, adjust the valve of the second flow valve (4) from top to bottom on the housing (7) according to the amount of material sucked in by the metering valve (2) as the measurement standard, until the flow rate of the second flow valve (4) from top to bottom on the housing (7) meets the preset requirements. Then switch the switching valve (3) to the state where the inside of the housing (7) is connected to the output pipe (6), thereby clearing the remaining first material in the metering valve (2). Then switch the switching valve (3) to the state where the metering valve (2) is connected to the inside of the housing (7). 5) After step 4) is completed, the servo motor is controlled by the control system to drive the shaft to rotate 60 degrees. Then, the third flow valve from top to bottom on the housing is opened by the control system. Then, the valve of the third flow valve (4) from top to bottom on the housing (7) is adjusted by the control system according to the amount of material sucked in by the metering valve (2) as the measurement standard until the flow of the third flow valve (4) from top to bottom on the housing (7) meets the preset requirements. Then, the switching valve (3) is switched to the state where the inside of the housing (7) is connected to the output pipe (6), thereby clearing the remaining first material in the metering valve (2). Then, the switching valve (3) is switched to the state where the metering valve (2) is connected to the inside of the housing (7). 6) After step 5) is completed, the servo motor is controlled by the control system to drive the shaft to rotate 60 degrees. Then, the fourth flow valve from top to bottom on the housing is opened by the control system. Then, the valve of the fourth flow valve (4) from top to bottom on the housing (7) is adjusted by the control system according to the amount of material sucked in by the metering valve (2) as the measurement standard until the flow of the fourth flow valve (4) from top to bottom on the housing (7) meets the preset requirements. Then, the switching valve (3) is switched to the state where the inside of the housing (7) is connected to the output pipe (6), thereby clearing the remaining first material in the metering valve (2). Then, the switching valve (3) is switched to the state where the metering valve (2) is connected to the inside of the housing (7). 7) After step 6) is completed, the servo motor is controlled by the control system to drive the shaft to rotate 60 degrees. Then, the fifth flow valve from top to bottom on the housing is opened by the control system. Then, the valve of the fifth flow valve (4) from top to bottom on the housing (7) is adjusted by the control system according to the amount of material sucked in by the metering valve (2) as the measurement standard until the flow of the fifth flow valve (4) from top to bottom on the housing (7) meets the preset requirements. Then, the switching valve (3) is switched to the state where the inside of the housing (7) is connected to the output pipe (6), thereby clearing the remaining first material in the metering valve (2). Then, the switching valve (3) is switched to the state where the metering valve (2) is connected to the inside of the housing (7). 8) Then, the servo motor is controlled by the control system to drive the shaft to continue to rotate 60 degrees. At this time, the output ends of the five flow valves (4) simultaneously convey materials into the housing (7), and then the materials in the housing (7) are conveyed from the output pipe (6) to the weighing device (5). 9) When the difference between the amount of material displayed on the weighing device (5) and the preset value is less than or equal to the range of the metering valve, the servo motor (9) is controlled by the control system to drive the rotating shaft (8) in step 8) to rotate 60 degrees in the opposite direction, so that all input pipes (1) are blocked by the arc-shaped blocking plate (10); then the metering valve (2) is used to slowly add material until the amount of the first material reaches the preset value. 10) Switch the switching valve (3) to the state where the metering valve (2) is connected to the inside of the housing (7), and then control the servo motor (9) through the control system to drive the rotating shaft (8) in step 9) to rotate 60 degrees in the opposite direction; at this time, the fifth flow valve (4) from top to bottom on the housing (7) is opened and the material flowing out of the fifth flow valve (4) from top to bottom on the housing (7) enters the metering valve (2). The metering valve (2) slowly injects the material in the fifth flow valve (4) from top to bottom on the housing (7) into the weighing device (5) according to the display of the weighing device (5). Finally, the remaining material in the metering valve (2) is discharged outside the weighing device (5). 11) After step 10), the servo motor (9) is controlled by the control system to drive the rotating shaft (8) in step 10) to rotate 60 degrees in the opposite direction. At this time, the fourth flow valve (4) on the housing (7) from top to bottom is opened and the material flowing out of the fourth flow valve (4) on the housing (7) from top to bottom enters the metering valve (2). The metering valve (2) slowly injects the material in the fourth flow valve (4) on the housing (7) from top to bottom into the weighing device (5) according to the display of the weighing device (5). Finally, the remaining material in the metering valve (2) is discharged out of the weighing device (5). 12) After step 11), the servo motor (9) is controlled by the control system to drive the rotating shaft (8) in step 11) to rotate 60 degrees in the opposite direction. At this time, the third flow valve (4) on the housing (7) from top to bottom is opened and the material flowing out of the third flow valve (4) on the housing (7) from top to bottom enters the metering valve (2). The metering valve (2) slowly injects the material in the third flow valve (4) on the housing (7) from top to bottom into the weighing device (5) according to the display of the weighing device (5). Finally, the remaining material in the metering valve (2) is discharged out of the weighing device (5). 13) After step 12), the servo motor (9) is controlled by the control system to drive the rotating shaft (8) in step 12) to rotate 60 degrees in the opposite direction. At this time, the second flow valve (4) on the housing (7) from top to bottom is opened and the material flowing out of the second flow valve (4) on the housing (7) from top to bottom enters the metering valve (2). The metering valve (2) slowly injects the material in the second flow valve (4) on the housing (7) from top to bottom into the weighing device (5) according to the display of the weighing device (5). Finally, the remaining material in the metering valve (2) is discharged out of the weighing device (5). 14) After step 13), the servo motor (9) is controlled by the control system to drive the shaft (8) in step 13) to rotate 60 degrees in the opposite direction. At this time, the first flow valve (4) on the housing (7) from top to bottom is opened and the material flowing out of the first flow valve (4) on the housing (7) from top to bottom enters the metering valve (2). The metering valve (2) slowly injects the material in the first flow valve (4) on the housing (7) from top to bottom into the weighing device (5) according to the display of the weighing device (5). Finally, the servo motor (9) is controlled by the control system to drive the shaft (8) to rotate 60 degrees in the opposite direction. Then all the flow valves (4) are closed and the remaining material in the metering valve (2) is discharged outside the weighing device (5).

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