Negative pressure control device and control method

Abstract

The invention belongs to the technical field of tobacco equipment, and discloses a negative pressure control device and a control method. The negative pressure control device comprises a force measuring component, a signal control component, a negative pressure tube, a valve and a display screen. The signal control component is communicatively connected with the force measuring component. The negative pressure tube is used to be installed on a paper cutting wheel, so that the paper cutting wheel can generate negative pressure suction, which will generate tension on the transmitted tipping paper. The valve is installed on the negative pressure tube, and the valve is communicatively connected with the signal control component. The valve is used to control the suction force of the negative pressure tube. According to the tipping paper tension measured by the force measuring component, the valve opening is adjusted through the signal control component, so that the negative pressure suction size of the paper cutting wheel can be automatically adjusted, so as to solve the cigarette quality problems such as tipping paper breakage and wrinkling in the production process, and improve the equipment operation efficiency. When the tension detection is abnormal, the operator adjusts the valve opening according to the tipping paper tension value displayed on the display screen, so that the negative pressure size of the paper cutting wheel is within a normal range.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco equipment, and in particular to a negative pressure control device and a control method. Background Art

[0002] Cigarette making machines mainly use shearing to cut tipping paper. The shearing paper cutting mechanism works by the cooperation of the paper cutting wheel and the cutter. The paper cutting wheel absorbs the tipping paper on the paper cutting wheel through suction and rotates clockwise. The cutter rotates counterclockwise to cut the tipping paper into pieces. Then the pieces rotate with the paper cutting wheel and are pasted on the cigarette packs one by one. However, the internal channel of the paper cutting wheel is easily blocked by cigarette foam and paper scraps in the working environment, resulting in weak suction, uneven length of the pieces and folding back of the front corner of the pieces. In addition, the air duct and suction holes of the paper cutting wheel are difficult to clean, affecting production efficiency.

[0003] In order to solve this problem, a self-cleaning device is added to the air duct of the paper cutting wheel. When the equipment stops running, it automatically blows and cleans the air duct to achieve maintenance-free paper cutting wheel air duct. At the same time, the suction hole structure of the paper cutting wheel is improved, and the suction hole is opened from a blind hole to a through hole, which is convenient for operators to thoroughly clean the suction hole of the paper cutting wheel. A sealing gasket is added to the end cover of the paper cutting wheel to ensure that the negative pressure does not leak when the paper cutting wheel is working. However, due to the differences in the types of tipping paper and the material properties between production batches, the negative pressure of the paper cutting wheel cannot be automatically adjusted according to the actual conditions of different types of tipping paper, resulting in cigarette quality problems such as tipping paper breakage and wrinkling during the production process.

[0004] Therefore, there is an urgent need for a negative pressure control device and a control method to solve the above problems. Summary of the invention

[0005] According to one aspect of the present invention, the present invention provides a negative pressure control device, which can automatically adjust the negative pressure suction size of the paper cutting wheel according to the tension of the tipping paper, so as to solve the cigarette quality problems such as the breakage and wrinkling of the tipping paper in the production process. At the same time, the operator adjusts the opening of the valve according to the tension value of the tipping paper displayed on the display screen, so that the negative pressure size of the paper cutting wheel is within a normal range.

[0006] In order to solve the above problems existing in the prior art, the present invention adopts the following technical solutions:

[0007] Negative pressure control device, comprising:

[0008] Force measuring assembly, used to measure the tension of tipping paper;

[0009] A signal control component, communicatively connected with the force measuring component;

[0010] Negative pressure pipe, used for installation on the paper cutting wheel;

[0011] A valve, installed on the negative pressure pipe, the valve is communicatively connected with the signal control component, and the valve is used to control the air suction force of the negative pressure pipe;

[0012] A display screen is electrically connected to the signal control component, the display screen is communicatively connected to the valve, and the display screen is used to display the tension value of the tipping paper and can adjust the opening of the valve.

[0013] Preferably, the signal control component includes a control circuit board, a signal receiving module and a signal sending module, the control circuit board is communicatively connected to the force measuring component through the signal receiving module, and the control circuit board is communicatively connected to the valve through the signal sending module.

[0014] Preferably, the control circuit board, the signal receiving module and the signal sending module are integrated.

[0015] Preferably, the force measuring assembly includes a bracket, a tension sensor, a locking sleeve and a paper guiding mechanism, the bracket is used to be fixed to an external device, the bracket has a accommodating cavity, the tension sensor is arranged in the accommodating cavity, the tension sensor is communicatively connected to the signal receiving module, the paper guiding mechanism is fastened to the tension sensor through the locking sleeve, and the paper guiding mechanism is used to transport the tipping paper.

[0016] Preferably, the paper guiding mechanism comprises a fixed shaft, a bearing and a roller sleeve, the fixed shaft is connected to the tension sensor, the inner ring of the bearing is fixedly connected to the fixed shaft, the outer ring of the bearing is fixedly connected to the roller sleeve, and the roller sleeve is used to abut against the tipping paper.

[0017] Preferably, the paper guiding mechanism further comprises a retaining ring, the retaining ring is fixedly sleeved on the fixed shaft, and the retaining ring is used to press against the bearing.

[0018] Preferably, the force measuring assembly further comprises a plugging cover, the bracket has a first opening and a second opening, the plugging cover is connected to the bracket and is used to seal the first opening, and the tension sensor is located in the accommodating cavity and connected to the fixed shaft through the second opening.

[0019] According to another aspect of the present invention, a negative pressure control method is provided. By implementing the negative pressure control device, the negative pressure control method includes:

[0020] S100: Determine the tensile force rating Xpv of the tipping paper;

[0021] S200: Determine the actual value Xav of the tension of the tipping paper. The calculation formula of the actual value Xav of the tension of the tipping paper is: Where n is the sampling number, which is 50, ki=50, Xi is the sampling value of the actual tension at the ith time, in N;

[0022] S300: Compare the difference X(t) between the rated value Xpv of the tipping paper tension and the actual value Xav of the tipping paper tension, and determine the opening of the valve through the signal control component. The calculation formula of the valve opening is: Wherein, Y is the opening value of the valve, Kp is the proportional coefficient, which is 2, Tn is the integration time, which is in ms, Td is the damping time, which is in ms, and Tv is the derivative time, which is in ms.

[0023] Preferably, the specific step S100 in the negative pressure control method includes:

[0024] S101: closing the valve and measuring the maximum tension Xmax of the tipping paper by the force measuring assembly when the cigarette making machine is stopped;

[0025] S102: The cigarette making machine is started, and a rated tension value Xpv of the tipping paper is determined, wherein Xpv<Xmax.

[0026] Preferably, the negative pressure control method further includes between S200 and S300:

[0027] S210: The operator manually adjusts the opening of the valve according to the tension value of the tipping paper displayed on the display screen, so that the negative pressure suction of the paper cutting wheel is within a normal range.

[0028] The beneficial effects of the present invention are:

[0029] The negative pressure control device provided by the present invention has a force measuring component for measuring the tension of the tipping paper, a signal control component and the force measuring component in communication connection, and a negative pressure tube for being installed on a paper cutting wheel, so that the paper cutting wheel can generate negative pressure suction, which will generate tension on the transmitted tipping paper. A valve is installed on the negative pressure tube, and the valve is in communication connection with the signal control component, and the valve is used to control the suction force of the negative pressure tube. According to the tipping paper tension measured by the force measuring component, the opening of the valve is adjusted by the signal control component. When the valve is in a closed state, the negative pressure suction on the paper cutting wheel is the largest, and when the valve is fully opened, the negative pressure suction on the paper cutting wheel is the smallest, thereby being able to automatically adjust the size of the negative pressure suction of the paper cutting wheel, ensure the shear stability of the tipping paper, solve the cigarette quality problems such as tipping paper breakage and wrinkling in the production process, and improve the equipment operation efficiency. The display screen is electrically connected to the signal control component, and the display screen is communicatively connected to the valve. When an abnormality occurs in the tension detection, the operator manually adjusts the opening of the valve according to the tension value of the tipping paper displayed on the display screen, so that the negative pressure suction size of the paper cutting wheel is within a normal range.

[0030] The negative pressure control method provided by the present invention is implemented by a negative pressure control device, and the negative pressure control method includes: determining the rated value of the tension of the tipping paper, determining the actual value of the tension of the tipping paper, comparing the difference between the rated value of the tension of the tipping paper and the actual value of the tension of the tipping paper, and determining the opening of the valve through a signal control component, so as to automatically adjust the negative pressure suction size of the paper cutting wheel, and solve the cigarette quality problems such as tipping paper breakage and wrinkling in the production process. At the same time, when the cigarette brand is changed, the material properties of its tipping paper are different, and the negative pressure size can be adjusted by manually controlling the valve opening, and the optimal valve opening can be determined by verifying the cigarette cutting effect, so as to obtain the optimal tension setting. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a force measuring assembly in an embodiment of the present invention;

[0032] Figure 2 is a cross-sectional view of a force measuring assembly in an embodiment of the present invention;

[0033] Figure 3 is a schematic diagram of a negative pressure control device in an embodiment of the present invention;

[0034] Figure 4 Flow chart of the negative pressure control method in an embodiment of the present invention.

[0035] Reference numerals:

[0036] 1. Force measuring assembly; 11. Bracket; 12. Tension sensor; 13. Locking sleeve; 14. Paper guide mechanism; 141. Fixed shaft; 142. Bearing; 143. Roller sleeve; 144. Retaining ring; 15. Cover;

[0037] 2. Signal control component; 21. Control circuit board; 22. Signal receiving module; 23. Signal sending module;

[0038] 3. Valve;

[0039] 4. Display screen. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0044] In the prior art, a self-cleaning device is added to the air duct of the paper cutting wheel. When the equipment stops running, it automatically blows and cleans the air duct to achieve maintenance-free paper cutting wheel air duct. At the same time, the suction hole structure of the paper cutting wheel is improved, and the suction hole is opened, changing from a blind hole to a through hole, so that the operator can clean the suction hole of the paper cutting wheel thoroughly. A sealing gasket is added to the end cover of the paper cutting wheel to ensure that the negative pressure does not leak when the paper cutting wheel is working. However, due to the differences in the types of tipping paper and the material properties between production batches, the negative pressure of the paper cutting wheel cannot be automatically adjusted according to the actual conditions of different types of tipping paper, resulting in cigarette quality problems such as tipping paper breakage and wrinkling during the production process. In this regard, this embodiment provides a negative pressure control device, which can automatically adjust the negative pressure suction size of the paper cutting wheel according to the tension of the tipping paper, solve the cigarette quality problems such as tipping paper breakage and wrinkling during the production process, and at the same time, the operator adjusts the opening of the valve according to the tension value of the tipping paper displayed on the display screen, so that the negative pressure size of the paper cutting wheel is within the normal range.

[0045] like Figure 1-Figure 3As shown, in this embodiment, the negative pressure control device includes a force measuring component 1, a signal control component 2, a negative pressure tube, a valve 3 and a display screen 4. Among them, the force measuring component 1 is used to measure the tension of the tipping paper, the signal control component 2 is connected to the force measuring component 1 in communication, the negative pressure tube is used to be installed on the paper cutting wheel, the valve 3 is installed on the negative pressure tube, the valve 3 is connected to the signal control component 2 in communication, the valve 3 is used to control the suction force of the negative pressure tube, the display screen 4 is electrically connected to the signal control component 2, the display screen 4 is connected to the valve 3 in communication, and the display screen 4 is used to display the tension value of the tipping paper and can adjust the opening of the valve 3. Specifically, along the transmission direction of the tipping paper, the force measuring component 1 for measuring the tension of the tipping paper is located between the paper supply roller and the glue coating device, and the measurement range of the tension is set to 0-100N. The force measuring component 1 is connected to the input end of the signal control component 2 in communication, and a negative pressure tube is installed on the paper cutting wheel so that the paper cutting wheel can generate negative pressure suction. Due to the negative pressure adsorption force of the paper cutting wheel, tension will be generated on the tipping paper being transmitted. Valve 3 is a bypass proportional regulating valve, which is installed on the side wall of the negative pressure pipe. When valve 3 is in a closed state, the negative pressure suction on the paper cutting wheel is the largest. When valve 3 is fully opened, the negative pressure suction on the paper cutting wheel is the smallest. According to the tipping paper tension measured by force measuring component 1, the opening of valve 3 is adjusted through signal control component 2, so that the negative pressure suction size of the paper cutting wheel can be automatically adjusted to ensure the shear stability of the tipping paper, solve the cigarette quality problems such as tipping paper breakage and wrinkling in the production process, and improve the operation efficiency of the equipment. It can be understood that when force measuring component 1 does not detect the tension of the tipping paper, force measuring component 1 sends a low level to signal control component 2, and signal control component 2 can control valve 3 to close. When force measuring component 1 detects the tension of the tipping paper, force measuring component 1 sends a high level to signal control component 2, and signal control component 2 can control valve 3 to open, and adjust the opening of valve 3 according to the tension of the tipping paper. When the tension detection is abnormal, the operator manually adjusts the opening of the valve 3 according to the tension value of the tipping paper displayed on the display screen 4, so that the negative pressure suction of the paper cutting wheel is within the normal range. It is understandable that when the cigarette brand is changed, the material properties of the tipping paper are different, and the negative pressure can be adjusted by manually controlling the opening of the valve 3. By verifying the cigarette cutting effect, the optimal opening of the valve 3 can be determined, thereby obtaining the optimal tension setting.

[0046] Further, continue to refer to Figure 1-Figure 3The signal control component 2 includes a control circuit board 21, a signal receiving module 22 and a signal sending module 23. The control circuit board 21 is connected to the force measuring component 1 through the signal receiving module 22, and the control circuit board 21 is connected to the valve 3 through the signal sending module 23. Specifically, the signal receiving module 22 is connected to the force measuring component 1, and the signal sending module 23 is connected to the valve 3. When the signal receiving module 22 receives the tension value measured by the force measuring component 1 as 0, that is, the force measuring component 1 does not detect the tension of the tipping paper, the force measuring component 1 sends a low level to the control circuit board 21 through the signal receiving module 22, and the control circuit board 21 can control the valve 3 to close through the signal sending module 23. When the signal receiving module 22 receives the tension value measured by the force measuring component 1, the force measuring component 1 sends a high level to the control circuit board 21 through the signal receiving module 22, and the control circuit board 21 can control the valve 3 to open through the signal sending module 23, and automatically adjust the opening of the valve 3 according to the tension of the tipping paper. Preferably, the control circuit board 21, the signal receiving module 22 and the signal sending module 23 are integrated.

[0047] Further, continue to refer to Figure 1-Figure 3 The force measuring assembly 1 includes a bracket 11, a tension sensor 12, a locking sleeve 13 and a paper guide mechanism 14. The bracket 11 is used to be fixed to an external device. The bracket 11 has a receiving cavity. The tension sensor 12 is arranged in the receiving cavity. The tension sensor 12 is communicatively connected with a signal receiving module 22. The paper guide mechanism 14 is fastened to the tension sensor 12 through the locking sleeve 13. The paper guide mechanism 14 is used to transmit the tipping paper. Specifically, the tension sensor 12 is fixed to the external device or to the rear wall panel of the device through the bracket 11. The locking sleeve 13 fastens the paper guide mechanism 14 and the tension sensor 12. The signal receiving module 22 is used to receive the tension of the tipping paper detected by the tension sensor 12.

[0048] Further, continue to refer to Figure 1-Figure 3 The paper guide mechanism 14 further includes a first connecting member, the locking sleeve 13 is provided with a mounting hole, and the first connecting member is installed in the mounting hole, so that the locking sleeve 13 fastens the paper guide mechanism 14 and the tension sensor 12. Specifically, the first connecting member is a fastening bolt, and the first connecting member passes through the mounting hole of the locking sleeve 13 for fastening, so as to ensure that the paper guide mechanism 14 and the tension sensor 12 are fastened and not easy to loosen.

[0049] Further, continue to refer to Figure 1-Figure 3The paper guide mechanism 14 includes a fixed shaft 141, a bearing 142 and a roller sleeve 143. The fixed shaft 141 is connected to the tension sensor 12. The inner ring of the bearing 142 is fixedly connected to the fixed shaft 141. The outer ring of the bearing 142 is fixedly connected to the roller sleeve 143. The roller sleeve 143 is used to abut against the tipping paper. Specifically, the fixed shaft 141 is fixed relative to the tension sensor 12. Under the action of the bearing 142, the roller sleeve 143 for transmitting the tipping paper can rotate relative to the fixed shaft 141. The tension sensor 12 can measure the tension of the tipping paper on the roller sleeve 143 through the paper guide mechanism 14.

[0050] Further, continue to refer to Figure 1-Figure 3 The paper guide mechanism 14 further includes a retaining ring 144 , which is fixedly sleeved on the fixed shaft 141 , and is used to press against the bearing 142 to ensure that the bearing 142 does not fall off the fixed shaft 141 .

[0051] Further, continue to refer to Figure 1-Figure 3 The force measuring assembly 1 further includes a plugging cover 15. The bracket 11 has a first opening and a second opening. The plugging cover 15 is connected to the bracket 11 and is used to block the first opening. The tension sensor 12 is located in the accommodating cavity and is connected to the fixed shaft 141 through the second opening. Specifically, the tension sensor 12 is placed in the accommodating cavity of the bracket 11 through the first opening, and the portion extending through the second opening is fastened to the fixed shaft 141 under the action of the locking sleeve 13, and then the plugging cover 15 is used to block the first opening.

[0052] Further, continue to refer to Figure 1-Figure 3 , the paper guide mechanism 14 further includes a second connecting member, the bracket 11 is provided with a first through hole, the plugging cover 15 is provided with a second through hole, and the second connecting member sequentially passes through the first through hole and the second through hole and is fixedly connected to the external device. Specifically, the second connecting member is a fastening bolt, the tension sensor 12 is placed in the accommodating cavity of the bracket 11, and the plugging cover 15 is used to block the first opening of the bracket 11. Under the action of the second connecting member, the bracket 11 and the plugging cover 15 are fixed to the external device or the rear wall panel together with the tension sensor 12.

[0053] This embodiment also provides a negative pressure control method, such as Figure 4 As shown, through the implementation of the above-mentioned negative pressure control device, the negative pressure control method includes:

[0054] S100: Determine the tensile rating Xpv of the tipping paper.

[0055] S100 is specifically:

[0056] S101: Close the valve 3 and measure the maximum tension Xmax of the tipping paper through the force measuring component 1 when the cigarette making machine is stopped.

[0057] Close valve 3. At this time, the negative pressure on the paper cutting wheel is the maximum. When the cigarette making machine is stopped, the tension of the tipping paper is measured by the force measuring component 1. The signal receiving module 22 receives the digital integer value Vmax of the tension sensor 12. The maximum tension Xmax of the tipping paper is obtained by Xmax=INTTO REAL(Vmax)×100 / 32767, and then the maximum tension Xmax is calculated to one decimal place by Xmax=INT TO REAL(REAL TO INT(Xmax×10)) / 100.

[0058] S102: The cigarette making machine is started, and the rated tension value Xpv of the tipping paper is determined, wherein Xpv<Xmax.

[0059] S200: Determine the actual value Xav of the tension of the tipping paper. The calculation formula of the actual value of the tension of the tipping paper is: Wherein, n is the sampling number, which is 50, ki=50, Xi is the sampling value of the actual tension for the ith time, and the unit is N.

[0060] Using the formula Calculate the average value Xav of the actual tension sampling value of the kraft paper to improve the reliability of tension sampling, where Xi is the i-th tension sampling value, set the sampling interval to 10ms, define the array array[1,…n]of real to store the most recent n tension sampling values, set the sampling number n to 50, xk is the k-th tension sampling value, where ki=50.

[0061] S210: The operator manually adjusts the opening of the valve 3 according to the tension value of the tipping paper displayed on the display screen 4, so that the negative pressure suction of the paper cutting wheel is within a normal range.

[0062] When the control mode is manual, the valve 3 is operated according to the opening set on the display screen 4, and the opening range of the valve 3 is 0-100%, where 100% means that the valve 3 is fully open. At this time, the negative pressure of the paper cutting wheel is the smallest. The operator manually sets and adjusts the opening of the valve 3 according to the displayed paper cutting wheel tension on the display screen 4. When the cigarette brand is changed, the material properties of its tipping paper are different. The negative pressure can be adjusted by manually controlling the opening of the valve 3. The optimal opening of the valve 3 can be determined by verifying the cigarette cutting effect, thereby obtaining the optimal tension setting.

[0063] S300: Compare the difference X(t) between the rated value Xpv of the tipping paper tension and the actual value Xav of the tipping paper tension, and determine the opening of the valve 3 through the signal control component 2. The calculation formula of the opening of the valve 3 is: Among them, Y is the opening value of valve 3, Kp is the proportional coefficient, the value is 2, Tn is the integration time, the unit is ms, Td is the damping time, the unit is ms, and Tv is the derivative time, the unit is ms.

[0064] When the control mode is automatic, the control circuit board 21 is used to adjust the output signal of the control valve 3, and its transfer function The opening value of the valve 3 is calculated, and the adjustment range is 0-100%. After on-site debugging, the proportional coefficient Kp is set to 2, the integral time Tn is 50ms, the damping time Td is 100ms, and the derivative time Tv is 10ms, which is the best. The final output Ya is obtained by Ya=REAL TO INT((100-Y)×32767 / 100), which corresponds to the output voltage of the signal sending module 23.

[0065] The negative pressure control method provided in this embodiment determines the rated value of the tension of the tipping paper, determines the actual value of the tension of the tipping paper, compares the difference between the rated value of the tension of the tipping paper and the actual value of the tension of the tipping paper, and determines the opening of the valve 3 through the signal control component 2, so that the negative pressure suction size of the paper cutting wheel can be automatically adjusted to ensure the shear stability of the tipping paper, solve the cigarette quality problems such as the breakage and wrinkling of the tipping paper in the production process, and improve the operation efficiency of the equipment. At the same time, when the cigarette brand is changed, the material properties of the tipping paper are different, and the negative pressure size can be adjusted by manually controlling the opening of the valve 3. The optimal opening of the valve 3 can be determined by verifying the cigarette cutting effect, thereby obtaining the optimal tension setting.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A negative pressure control device, characterized in that: include: A force measuring assembly (1), used for measuring the tension of the tipping paper; A signal control component (2) is communicatively connected to the force measuring component (1); Negative pressure pipe, used for installation on the paper cutting wheel; A valve (3) is installed on the negative pressure pipe, the valve (3) is communicatively connected with the signal control component (2), and the valve (3) is used to control the suction force of the negative pressure pipe; A display screen (4) is electrically connected to the signal control component (2), the display screen (4) is communicatively connected to the valve (3), and the display screen (4) is used to display the tension value of the tipping paper and can adjust the opening of the valve (3); The signal control component (2) comprises a control circuit board (21), a signal receiving module (22) and a signal sending module (23); the control circuit board (21) is communicatively connected to the force measuring component (1) via the signal receiving module (22); and the control circuit board (21) is communicatively connected to the valve (3) via the signal sending module (23); The force measuring assembly (1) comprises a bracket (11), a tension sensor (12), a locking sleeve (13) and a paper guide mechanism (14); the bracket (11) is used to be fixed to an external device; the bracket (11) has a receiving cavity; the tension sensor (12) is arranged in the receiving cavity; the tension sensor (12) is communicatively connected to the signal receiving module (22); the paper guide mechanism (14) is tightly connected to the tension sensor (12) via the locking sleeve (13); and the paper guide mechanism (14) is used to transport the tipping paper; The paper guide mechanism (14) comprises a fixed shaft (141), a bearing (142) and a roller sleeve (143); the fixed shaft (141) is connected to the tension sensor (12); the inner ring of the bearing (142) is fixedly connected to the fixed shaft (141); the outer ring of the bearing (142) is fixedly connected to the roller sleeve (143); and the roller sleeve (143) is used to abut against the tipping paper; The paper guide mechanism (14) further comprises a retaining ring (144), wherein the retaining ring (144) is fixedly sleeved on the fixed shaft (141), and the retaining ring (144) is used to press against the bearing (142); The force measuring assembly (1) further comprises a blocking cover (15), the bracket (11) having a first opening and a second opening, the blocking cover (15) being connected to the bracket (11) and used for blocking the first opening, and the tension sensor (12) being located in the accommodating cavity and connected to the fixed shaft (141) via the second opening.

2. The negative pressure control device according to claim 1, characterized in that: The control circuit board (21), the signal receiving module (22) and the signal sending module (23) are integrated.

3. Negative pressure control method, characterized in that: The negative pressure control method is implemented by the negative pressure control device according to any one of claims 1 to 2, comprising: S100: Determine the tensile force rating Xpv of the tipping paper; S200: Determine the actual value Xav of the tension of the tipping paper. The calculation formula of the actual value Xav of the tension of the tipping paper is: Where n is the sampling number, which is 50, ki=50, Xi is the sampling value of the actual tension at the ith time, in N; S300: Compare the difference X(t) between the rated value Xpv of the tension of the tipping paper and the actual value Xav of the tension of the tipping paper, and determine the opening of the valve (3) through the signal control component (2). The calculation formula of the opening of the valve (3) is: Wherein, Y is the opening value of the valve (3), Kp is the proportional coefficient, which is 2, Tn is the integration time, in ms, Td is the damping time, in ms, and Tv is the derivative time, in ms.

4. The negative pressure control method according to claim 3, characterized in that: The specific step S100 in the negative pressure control method includes: S101: closing the valve (3) and measuring the maximum tension Xmax of the tipping paper by means of the force measuring assembly (1) when the cigarette making machine is in a stopped state; S102: The cigarette making machine is started, and a rated tension value Xpv of the tipping paper is determined, wherein Xpv<Xmax.

5. The negative pressure control method according to claim 4, characterized in that: The negative pressure control method further includes between S200 and S300: S210: The operator manually adjusts the opening of the valve (3) according to the tension value of the tipping paper displayed on the display screen (4) so ​​that the negative pressure suction of the paper cutting wheel is within a normal range.

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