Roller gap control device of roller press

Abstract

The utility model relates to the technical field of roller presses, and discloses a roller press roller gap control device which comprises a first roller and a second roller which are oppositely arranged, and a roller gap is formed between the first roller and the second roller. The execution module is in driving connection with the first roller, and the first control module is connected with the execution module to control the execution module to drive the first roller to move to a first set position so as to preliminarily adjust a roller gap; and the second control module is connected with the execution module to control the execution module to drive the first roller to move to a second set position so as to adjust the roller gap for the second time. According to the utility model, the first control module and the second control module are adopted to realize secondary movement control on the first roller respectively, so that direct measurement on the roller gap is realized without being influenced by a bearing gap, deformation and the oil temperature of an oil cylinder, the thickness of a pole piece and the set position deviation of the roller gap are effectively reduced, and the measurement precision is improved. And the pole piece thickness and the roll gap position linearity are improved.

Description

Technical Field

[0001] This utility model belongs to the field of roller press technology, and specifically relates to a roller gap control device for roller presses. Background Technology

[0002] The roller press is designed based on the principle of bed grinding, and its main features are: high pressure, full speed, full material, and bed crushing. The roller press consists of two opposing, synchronously rotating extrusion rollers, one fixed and one movable. Material is fed from above the rollers and continuously drawn into the space between them by the extrusion rollers. Under high pressure of 100-150 MPa, it is transformed into a dense cake and discharged from the bottom of the machine.

[0003] In existing roller press roll gap detection and closed-loop control, the roll gap is indirectly measured and controlled by a magnetostrictive sensor installed in the hydraulic cylinder. That is, by adjusting the position of the hydraulic cylinder, the lower roll is pushed up and down, thereby indirectly adjusting the roll gap size.

[0004] However, this method indirectly measures and controls the roll gap size, rather than using the actual roll gap value. Due to the significant influence of factors such as pressure, deformation, and bearing clearance, it is difficult to match the measured value of the magnetostrictive sensor with the actual roll gap value, resulting in a difference in the linearity between the electrode thickness and the roll gap position. Furthermore, the equipment has poor stability, and the process capability index CPK and σ value of the rolled electrode thickness are both very low. Utility Model Content

[0005] To address the shortcomings of the existing technology, this utility model provides a roller gap control device for a roller press. Through the design of a first control module and a second control module, the first control module controls the execution module to drive the movement of the first roller, and the second control module again controls the execution module to drive the movement of the first roller to adjust the roller gap size. This enables direct measurement of the roller gap, thus avoiding the influence of bearing clearance, deformation, and oil temperature. The deviation between the electrode thickness and the set roller gap position is small; it effectively improves the linearity of the electrode thickness and roller gap position; operation is simple; and it ensures the stability of equipment operation, thereby greatly improving the stability of the electrode thickness after roller pressing.

[0006] The technical effects to be achieved by this utility model are realized through the following aspects:

[0007] In a first aspect, this utility model provides a roller gap control device for a roller press, including...

[0008] A roll module includes a first roll and a second roll arranged opposite to each other, with a roll gap formed between the first roll and the second roll;

[0009] An execution module is connected to the first roll drive to control the movement of the first roll;

[0010] A first control module, connected to the execution module, controls the execution module to drive the first roll to a first set position for preliminary adjustment of the roll gap; and

[0011] The second control module is connected to the execution module to control the execution module to drive the first roll to a second set position for secondary adjustment of the roll gap.

[0012] In some implementations, the first control module includes:

[0013] A first sensing component is used to sense and convert the signal of the roll gap; and

[0014] A control component is connected between the first sensing component and the execution module. It receives and processes the signal of the roll gap and the target value of the roll gap, and transmits an action signal to the execution module.

[0015] In some implementations, the first sensing component includes:

[0016] A first sensor is used to measure the position signal of the roll gap; and

[0017] A first analog unit is connected between the first sensor and the control component, so that the first analog unit receives the position signal of the roll gap measured by the first sensor, converts it into an analog signal and transmits it to the control component.

[0018] In some implementations, the control component includes a hydraulic controller and a position control unit, wherein the position control unit is connected between the first analog quantity unit and the hydraulic controller;

[0019] The position control unit feeds back the position signal of the roll gap to the hydraulic controller. The hydraulic controller combines the position signal fed back by the position control unit with the target value of the roll gap and transmits an action signal to the execution module.

[0020] In some implementations, the second control module includes:

[0021] The second sensor is located on both sides of the roll gap and is used to measure the position signal of the roll gap;

[0022] The control unit is connected to the second sensor, and

[0023] The second analog signal unit is connected to the control unit. The second analog signal unit receives the position signal measured by the second sensor through the control unit and converts it into an analog signal, which is then transmitted to the control component.

[0024] In some implementations, the execution module includes: a hydraulic cylinder connected to the first sensor, the first sensor sensing the amount of movement of the first roll pushed by the hydraulic cylinder to indirectly obtain the position of the roll gap; and

[0025] A servo valve is connected between the control component and the hydraulic cylinder.

[0026] In some implementations, the hydraulic controller includes:

[0027] The PID calculation unit is used to calculate the position deviation of the roll gap in real time and output the roll gap adjustment signal; and

[0028] The feedforward calculation unit, connected to the PID calculation unit, is used to compare the adjustment signal output by the PID calculation unit with the target value of the roll gap, and output a compensation action.

[0029] In some implementations, the first sensor is a magnetostrictive sensor.

[0030] In some implementations, the second sensor is a capacitive sensor.

[0031] In summary, this utility model has at least the following advantages:

[0032] The roller gap control device for a roller press provided by this utility model controls the movement of the first roller through a first control module. Specifically, a first sensor measures the position signal of the roller gap, converts the position signal into an analog signal through a first analog unit, and transmits it to a control component for processing. Combining the first positioning value and the roller gap position signal, a displacement signal to push the first roller is then transmitted to the execution module, causing the execution module to move the first roller to a first set position, thereby realizing the movement of the first roller. Then, a second control module is switched to control the execution module to drive the movement of the first roller a second time. Specifically, a second sensor senses the roller gap distance after the first roller has moved, and combined with the set second positioning value, the second sensor measures the position signal of the roller gap, converts the signal into an analog signal received by the control component through a second analog unit, and combines the second positioning value and the roller gap position signal to transmit a second displacement signal to the execution module to push the first roller until the first roller is moved to a second set position.

[0033] 1. The roller gap control operation of this utility model enables direct measurement of the roller gap, thus being unaffected by bearing clearance, deformation, or hydraulic cylinder temperature, ensuring precise adjustment of the roller gap and significantly reducing the deviation between the electrode thickness and the roller gap setting position. For example, if the required electrode thickness is 120μm, the roller gap setting position only needs to be set to 90~100μm. Furthermore, for every 1μm change in electrode thickness, the roller gap setting value only needs to change by 1~2μm, effectively improving the linearity between electrode thickness and roller gap position, and simplifying operation.

[0034] 2. The roller gap control device of the roller press provided by this utility model uses a first control module and a second control module to control the movement of the first roller twice. The action is independent and the roller gap can be precisely adjusted. Moreover, it is not affected by the pressure during the zero-point calibration, ensuring that the roller gap remains stable, thereby realizing the stability of equipment operation and greatly improving the uniformity of the electrode thickness after roller pressing. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the roller gap control device for the roller press in Example 1.

[0036] Figure 2 This is a schematic diagram of the roller gap control device for the roller press in Example 2.

[0037] Figure 3 This is the closed-loop logic diagram of the first control module in Example 2.

[0038] Figure 4 This is the closed-loop logic diagram of the second control module in Example 2.

[0039] Figure 5 This is a flowchart of the switching from the first control module to the second control module in Example 2.

[0040] Figure 6 This is a flowchart of the roller gap control method for the roller press in Example 3.

[0041] Figure 7 This is a flowchart of the roll gap calibration in Example 3.

[0042] Figure 8 This is a schematic diagram of the roll gap measurement structure in Example 3.

[0043] Marked in the image:

[0044] 1. Roll module, 11. First roll, 12. Second roll, 13. Roll gap; 2. First control module, 21. First sensing component, 211. First sensor, 212. First analog quantity unit, 22. Control component, 221. Hydraulic controller, 2211. PID calculation unit, 2212. Feedforward calculation unit, 222. Position control unit; 3. Second control module, 31. Second sensor, 32. Control unit, 33. Second analog quantity unit; 4. Execution module, 41. Hydraulic cylinder, 42. Servo valve. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0046] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0047] Example 1:

[0048] Please see the appendix Figure 1 The roller gap control device of this utility model includes a roller module 1, an execution module 4, a first control module 2 and a second control module 3.

[0049] The roll module 1 includes a first roll 11 and a second roll 12 arranged opposite to each other, with a roll gap 13 formed between the first roll 11 and the second roll 12.

[0050] The execution module 4 is driven to connect to the first roll 11 to control the movement of the first roll 11.

[0051] The first control module 2 is connected to the execution module 4 to control the execution module 4 to drive the first roll 11 to move to the first set position for preliminary adjustment of the roll gap 13.

[0052] The second control module 3 is connected to the execution module 4 to control the execution module 4 to drive the first roll 11 to move to the second set position and perform secondary adjustment of the roll gap 13.

[0053] In this embodiment, the roll gap control device for the roller press adjusts the roll gap 13 by controlling the first roll 11 to move twice according to the target roll gap value. Specifically, the first control module 2 transmits a corresponding action signal to the execution module 4 based on the existing roll gap 13 and the initially set roll gap target value, thereby moving the first roll 11 to the first set position to achieve the first adjustment of the roll gap 13. Then, it automatically switches to the second control module 3, which transmits a corresponding action signal to the execution module 4 based on the roll gap 13 adjusted by the execution module 4 and the second set roll gap 13 target value, thereby moving the first roll 11 to the second set position to accurately complete the adjustment of the roll gap 13. Because the first roll 11 may not move to the correct position during the adjustment process due to factors such as pressure, deformation, and bearing seat clearance, there will be a certain deviation. The second control module 3 then performs a second adjustment on the movement position of the first roll 11 based on the roll gap requirements until the deviation in the movement of the first roll 11 is eliminated, so as to achieve precise adjustment of the roll gap 13.

[0054] Through the aforementioned roll gap adjustment process, the first control module 2 indirectly monitors and moves the first roll 11, while the second control module 3 directly monitors the roll gap and performs secondary adjustment control on the first roll 11. By employing both control modules and combining the two roll gap adjustments, deviations in roll gap adjustment caused by factors such as bearing clearance, deformation, and cylinder oil temperature can be corrected, thus ensuring the accuracy of roll gap adjustment. Simultaneously, the deviation between the electrode thickness and the roll gap setting position can be significantly reduced. For example, when the required electrode thickness is 120μm, the roll gap setting position only needs to be set to 90~100μm. Furthermore, for every 1μm change in electrode thickness, the roll gap setting value only needs to change by 1~2μm, effectively improving the linearity between electrode thickness and roll gap position.

[0055] In this structure, the operation of adjusting the roll gap is simple. The first control module 2 and the second control module 3 are used to adjust the first roll 11 twice. When calibrating at zero point, it is not affected by the magnitude of the calibration pressure, ensuring precise adjustment of the roll gap. This keeps the distance between the first roll 11 and the second roll 12 stable, effectively ensuring the uniformity of the electrode thickness after rolling and achieving the stability of equipment operation.

[0056] Example 2:

[0057] The difference between this embodiment and Embodiment 1 is that, please refer to... Figures 2-3 The first control module 2 in this embodiment includes a first sensing component 21 and a control component 22.

[0058] The first sensing component 21 is used to sense and convert the roll gap signal. Specifically, the first sensing component 21 includes a first sensor 211 and a first analog unit 212. The first sensor 211 is a magnetostrictive sensor used to measure the roll gap position signal. The first analog unit 212 is connected between the first sensor 211 and the control component 22, so that the first analog unit 212 receives the roll gap position signal measured by the first sensor 211, converts it into an analog signal, and transmits it to the control component 22.

[0059] The control component 22 is connected between the first sensing component 21 and the execution module 4, receives and processes the roll gap signal and the target value of the roll gap, and transmits the action signal to the execution module 4.

[0060] Specifically, the control component 22 includes a hydraulic controller 221 and a position control unit 222. The position control unit 222 is connected between the first analog quantity unit 212 and the hydraulic controller 221. The position control unit 222 feeds back the position signal of the roll gap to the hydraulic controller 221. The hydraulic controller 221 combines the position signal fed back by the position control unit 222 with the target value of the roll gap and transmits the action signal to the execution module 4.

[0061] The hydraulic controller 221 includes a PID calculation unit 2211 and a feedforward calculation unit 2212. The PID calculation unit 2211 is used to calculate the roll gap position deviation in real time and output the roll gap adjustment signal. The feedforward calculation unit 2212 is connected to the PID calculation unit 2211 and is used to compare the adjustment signal output by the PID calculation unit 2211 with the target value of the roll gap, and output a compensation action. Through the coordinated use of the PID calculation unit 2211 and the feedforward calculation unit 2212, the hydraulic controller 221 can effectively improve the accuracy of controlling the movement of the first roll 11 and reduce movement deviation.

[0062] In this embodiment, the first control module 2 sets a first positioning value of 1.5mm for the roll gap in the internal control system. It uses a magnetostrictive sensor (MTS sensor) as the input for closed-loop control. The MTS sensor indirectly monitors the roll gap by sensing the position of the hydraulic cylinder 41 and transmits the position signal to the first analog unit 212 for signal conversion. Then, the analog signal is transmitted to the hydraulic controller 221 through the position control unit 222. The hydraulic controller 221 combines the target value of the roll gap and the position signal fed back by the position control unit 222. The hydraulic controller 221 uses the PID calculation unit 2211 to perform slope curve closed-loop PID control according to the first positioning value of the roll gap, so that the current value follows the slope curve of the first positioning value. The feedforward calculation unit 2212 outputs a compensation action and then transmits an action signal to the execution module 4, driving the execution module 4 to adjust the roll gap to the first positioning value, effectively ensuring the accuracy of the adjustment of the first roll 11.

[0063] The execution module 4 includes a hydraulic cylinder 41 and a servo valve 42. The hydraulic cylinder 41 is connected to a first sensor 211, which senses the amount of movement of the first roll 11 pushed by the hydraulic cylinder 41 to indirectly obtain the position of the roll gap. The servo valve 42 is connected between the control component 22 and the hydraulic cylinder 41.

[0064] By setting the execution module 4, after receiving the action signal from the hydraulic controller 221, the execution module 4 controls the opening of the servo valve 42 to adjust the pressure of the rodless chamber and the rod chamber of the hydraulic cylinder 41, thereby pushing the first roll 11 to rise to the set position.

[0065] As described above, by using the cooperation of the first control module 2 and the execution module 4, the initial adjustment of the position of the first roll 11 can be achieved, which can ensure the accuracy of the movement of the first roll 11 and greatly reduce the movement error.

[0066] In some embodiments, see Figure 2 and Figure 4 The second control module 3 includes a second sensor 31, a control unit 32, and a second analog quantity unit 33.

[0067] The second sensor 31 is disposed on both sides of the roll gap and is used to measure the position signal of the roll gap. The second sensor 31 is a high-precision capacitive sensor. The position of the second sensor 31 allows direct measurement of the gap size between the first roll 11 and the second roll 12. The control unit 32 is connected to the second sensor 31.

[0068] The second analog unit 33 is connected to the control unit 32. The second analog unit 33 receives the position signal measured by the second sensor 31 via the control unit 32 and converts it into an analog signal, which is then transmitted to the control component 22. This configuration enables sensitive sensing and ensures the accuracy of the sensing, thereby greatly reducing errors.

[0069] In this embodiment, after the first roll 11 is initially adjusted, the closed-loop input value of the second control module 3 automatically switches from the first sensor 211 to the second sensor 31. The second sensor 31 directly measures the roll gap 13 between the first roll 11 and the second roll 12 after the initial adjustment according to the first control module 2, and transmits the roll gap signal to the second analog quantity unit 33 for amplification and conversion processing. The analog quantity of the roll gap signal is fed back to the hydraulic controller 221 through the position control unit 222 in the control component 22. The hydraulic controller 221 combines and processes the second positioning value of the roll gap set in the internal control system and the roll gap position signal, and transmits the execution action to the execution module 4, so that the opening of the control servo valve 42 is adjusted to adjust the pressure of the rodless chamber and the rod chamber of the hydraulic cylinder 41, thereby pushing the first roll 11 to rise again to the set position, realizing the secondary adjustment of the first roll 11 until the roll gap is adjusted to the set requirement.

[0070] Furthermore, without depressurizing the system, the desired roll gap size can be directly achieved by modifying the roll gap target value on the human-machine interface, driven by the second control module 3 and the execution module 4. In this case, the roll gap value measured by the first sensor 211 is no longer used as a reference value for the roll gap size. This setting does not require system reset, is simple to operate, and can flexibly meet diverse roll gap requirements.

[0071] Please see Figure 5 Furthermore, since the first control module 2 drives the execution module 4 to control the first roll 11 for the first time, and then the second control module 3 drives the execution module 4 to control the first roll 11 for the second time, this involves a switch of the closed-loop input quantity, switching from the first sensor 211 to the second sensor 31 to measure the roll gap, causing the execution module 4 to perform the corresponding action on the first roll 11. During the switching process between the first sensor 211 and the second sensor 31, the input quantity is smoothed, such as by filtering; and the PID calculation unit 2211 in the hydraulic controller 221 is automatically paused during the switching process; in addition, after the switching is completed, the closed-loop gain is automatically reduced for a certain period of time to avoid overshoot. By adopting the above-mentioned switching method, phenomena such as violent fluctuations in the roll gap and abnormal noises during the adjustment of the servo valve 42 can be effectively avoided, thereby ensuring a smooth switching process and greatly improving the stability of the switching.

[0072] The second sensor 31 described above can be used to directly measure the roll gap, thus avoiding the influence of bearing clearance, deformation, and oil temperature of the cylinder. This effectively ensures the precise adjustment of the roll gap, greatly reduces the deviation between the electrode thickness and the roll gap setting position, and improves the linearity between the electrode thickness and the roll gap position.

[0073] Example 3:

[0074] This embodiment, based on the above embodiments, provides a method for controlling the roll gap of a roller press, as shown in Figure 6, including the following steps:

[0075] S1, Set the roll gap positioning value; Preset the roll gap size after the first roll 11 moves as the first positioning value, and preset the roll gap size after the first roll 11 moves as the second positioning value;

[0076] S2, control the first roll 11 to move to the first set position; the first control module 2 controls the execution module 4 to drive the first roll 11, and move the first roll 11 to the first set position according to the first positioning value;

[0077] S3, control the first roll 11 to move to the second set position; the second control module 3 controls the execution module 4 to drive the first roll 11, and move the first roll 11 to the second set position according to the second positioning value; finally achieve the required roll gap 13.

[0078] By setting up the above method, firstly, a first positioning value and a second positioning value are set in the internal system; secondly, the roll gap 13 is indirectly monitored by the first sensor 211 in the first control module 2, thereby controlling the first roll 11 to move to the first set position, so that the roll gap size is the first positioning value; finally, the roll gap is directly monitored by the second sensor 31 in the second control module 3, controlling the first roll 11 to move to the second set position, so that the roll gap size is the second positioning value. By implementing indirect and direct monitoring of the roll gap, two adjustments to the roll gap are achieved. The direct monitoring of the roll gap is not affected by factors such as bearing clearance, deformation, and oil temperature of the cylinder, effectively ensuring the accuracy of the roll gap adjustment, greatly reducing the deviation between the electrode thickness and the roll gap set position, effectively ensuring the accuracy of the roll gap adjustment, improving the linearity between the electrode thickness and the roll gap position, thereby improving the uniformity of the electrode thickness after rolling.

[0079] In some embodiments, before step S1, step S4 is included: roll gap calibration, used to calibrate the control accuracy of the first control module 2 and the second control module 3. By setting this step, after replacing the first sensor 211 and / or the second sensor 31, the roll gap calibration in step 4 is required to calibrate the first sensor 211 and the second sensor 31, ensuring the accuracy of subsequent roll gap adjustments.

[0080] In some embodiments, in S4, see Figures 7-8 This includes the following steps:

[0081] S41, adjust the roll gap to 0; the first roll 11 rises until it completely touches the second roll 12;

[0082] S42, calculate the calibration value; press the calibration button on the human-machine interface, and set the calibration value of the second control module 3 to D0, the distance from the second control module 3 to the side end of the first roll 11 to D1, and the distance from the second control module 3 to the side end of the second roll 12 to D2, specifically D0 = D1 + D2.

[0083] S43, calculate the roll gap d: specifically d=(D1+D2)-D0.

[0084] Through the above calibration steps, the second sensor 31 in the second control module 3 can directly monitor the roll gap, ensuring that the calibration is not affected by the magnitude of the calibration pressure, thus guaranteeing the accuracy of the calibration and providing a good monitoring basis for subsequent roll gap adjustment. Furthermore, the calibration steps are simple to operate, enabling rapid calibration.

[0085] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0086] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0087] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0088] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0089] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A roller gap control device for a roller press, characterized in that, include The roll module (1) includes a first roll (11) and a second roll (12) arranged opposite to each other, with a roll gap (13) formed between the first roll (11) and the second roll (12). The execution module (4) is driven and connected to the first roll (11) to control the movement of the first roll (11); The first control module (2) is connected to the execution module (4) to control the execution module (4) to drive the first roll (11) to move to the first set position for preliminary adjustment of the roll gap (13); and The second control module (3) is connected to the execution module (4) to control the execution module (4) to drive the first roll (11) to move to the second set position and perform a secondary adjustment of the roll gap (13).

2. The roller gap control device for a roller press according to claim 1, characterized in that, The first control module (2) includes: A first sensing component (21) is used to sense and convert the signal of the roll gap; and The control component (22) is connected between the first sensing component (21) and the execution module (4), receives and processes the signal of the roll gap and the target value of the roll gap, and transmits the action signal to the execution module (4).

3. The roller gap control device for a roller press according to claim 2, characterized in that, The first sensing component (21) includes: A first sensor (211) is used to measure the position signal of the roll gap; and The first analog unit (212) is connected between the first sensor (211) and the control component (22) so that the first analog unit (212) receives the position signal of the roll gap measured by the first sensor (211) and converts it into an analog signal and transmits it to the control component (22).

4. The roller gap control device for a roller press according to claim 3, characterized in that, The control component (22) includes a hydraulic controller (221) and a position control unit (222), wherein the position control unit (222) is connected between the first analog quantity unit (212) and the hydraulic controller (221); The position control unit (222) feeds back the position signal of the roll gap to the hydraulic controller (221). The hydraulic controller (221) combines the position signal fed back by the position control unit (222) with the target value of the roll gap and transmits the action signal to the execution module (4).

5. The roller gap control device for a roller press according to claim 2, characterized in that, The second control module (3) includes: The second sensor (31) is disposed on both sides of the roll gap (13) and is used to measure the position signal of the roll gap (13); The control unit (32) is connected to the second sensor (31), and The second analog unit (33) is connected to the control unit (32). The second analog unit (33) receives the position signal measured by the second sensor (31) through the control unit (32) and converts it into an analog signal to be transmitted to the control component (22).

6. The roller gap control device for a roller press according to claim 3, characterized in that, The execution module (4) includes: A hydraulic cylinder (41) is connected to the first sensor (211), which senses the amount of movement of the first roll (11) pushed by the hydraulic cylinder (41) to indirectly obtain the position of the roll gap; and A servo valve (42) is connected between the control assembly (22) and the hydraulic cylinder (41).

7. The roller gap control device for a roller press according to claim 4, characterized in that, The hydraulic controller (221) includes: The PID calculation unit (2211) is used to calculate the position deviation of the roll gap in real time and output the roll gap adjustment signal; and The feedforward calculation unit (2212) is connected to the PID calculation unit (2211) and is used to compare the adjustment signal output by the PID calculation unit (2211) with the target value of the roll gap, and output a compensation action.

8. The roller gap control device for a roller press according to claim 3, characterized in that, The first sensor (211) is a magnetostrictive sensor.

9. The roller gap control device for a roller press according to claim 5, characterized in that, The second sensor (31) is a capacitive sensor.

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