Fiber raw material ingredient metering control system for spunlace non-woven fabric production

Abstract

The utility model discloses a fiber raw material ingredient metering control system for spunlace non-woven fabric production, and belongs to the technical field of spunlace non-woven fabrics. Based on an existing fiber raw material bale opener, a control system comprises a controller, a motor I, a motor II, a photoelectric switch, a weighing sensor and an electromagnetic valve, a frequency converter I is arranged on the motor I, and the frequency converter I is connected with the controller through an electric signal; a frequency converter II is arranged on the motor II and is connected with the controller through an electric signal; the air cylinder is connected with the electromagnetic valve through an air source pipe, and the electromagnetic valve is connected with the controller through electric signals. The photoelectric switch and the weighing sensor are connected with the controller through electric signals. On one hand, the feeding speed of each bale opener is kept relatively constant, and the batching and metering accuracy of fiber raw materials is improved; and on the other hand, the device is well matched with a fiber raw material proportioning and metering process for spunlace non-woven fabric production.

Description

TECHNICAL FIELD

[0001] The utility model relates to a raw material batching metering control system, especially to the fiber raw material batching metering control system for the production of spunlace non - woven fabric belongs to spunlace non - woven fabric technical field. BACKGROUND

[0002] Spunlace non - woven fabric, with fiber as raw material, forms after opening mixing, carding, laying, drawing, water jet, drying and winding. At present, the mainstream spunlace non - woven fabric processing process is as follows: one, fiber opening: fiber raw material is quantitatively opened and mixed; two, fiber web forming: carding, air laying, wet laying; three, fiber web laying: cross-laying or parallel laying (two comb half-cross laying, two comb two-laying full-cross laying, two comb parallel laying); four, fiber web consolidation: fiber web is penetrated and entangled by high-pressure water needle; five, fiber cloth dewatering: vacuum suction, cloth surface is dewatered; six, fiber cloth drying: hot air penetration or cylinder drying.

[0003] In the production process of spunlace non - woven fabric, different raw materials need to be mixed in a certain proportion, and in order to accurately control the proportion, the input quantity needs to be accurately controlled. At present, the mainstream scheme is to install a weighing sensor on the unpacking machine, the worker unpacks the raw material, places it on the conveying curtain, and conveys it to the angle nail curtain. The angle nail curtain hooks the raw material and conveys it upward. The raw material with too large volume is torn and scattered by the even cotton beating hammer and falls back to the conveying curtain. The raw material with small volume passes through the even cotton beating hammer smoothly, and the cotton is completely stripped by the rear stripping cotton beating hammer and sent into the hopper. When the weight of the raw material in the hopper (weighed by the weighing sensor) reaches the set value, the cotton feeding is stopped, and other unpacking machines are waited. When all the unpacking machines are weighed, the raw material is dropped into the coarse opening cotton machine, and the mixing work is completed by the coarse opening cotton machine.

[0004] At present, for the unpacking machine using this working mode, some raw materials will inevitably enter the hopper during the stop feeding process, causing overshoot phenomenon, and finally leading to the actual weighed raw material being higher than the set value, and further leading to the deviation of the raw material proportion, which greatly affects the subsequent process and the quality of spunlace non - woven fabric. In order to solve this problem, the "pre-stopping weight" is set, so that the current weight value has not reached the set value, and the stop feeding operation is started, so as to compensate for this part of influence. However, in actual production, the weight of the raw material additionally fed after stopping feeding is affected by many factors, including the degree of raw material being easily hooked, the number of raw material accumulation on the conveying curtain, and the distance between the even cotton beating hammer and the angle nail curtain. Therefore, using a single parameter cannot guarantee the accuracy of weighing, and the parameter should be adjusted in real time according to the actual situation.

[0005] Although the prior art CN110782179A discloses "a digital production system of polylactic acid spunlace non-woven fabric", but it mainly solves the problem that the market still lacks modern polylactic acid spunlace non-woven fabric production system, and the production efficiency of polylactic acid fiber spunlace non-woven fabric is low, the product quality cannot be guaranteed, and the production cost is high. CN210592842U discloses a non-woven fabric production opening machine capable of controlling the amount of fiber raw material pouring out, wherein the accuracy of the ratio is ensured by slowly opening the discharge port and slowly falling of the fiber raw material, and the fiber raw material cannot be poured out from the inside of the discharge box at one time; CN218777832U discloses "an opening machine with automatic weighing function", but it mainly solves the problem that manual placement of the pressed block of non-woven fabric is scattered and the work efficiency is low;

[0006] Therefore, how to ensure the smooth and stable development of the fiber raw material batching and metering process is a problem that needs to be solved at present. SUMMARY

[0007] In order to solve the problem of poor accuracy of fiber raw material batching and metering in the existing spunlace non-woven fabric production process, and to ensure the smooth and stable development of the fiber raw material batching and metering process, a fiber raw material batching and metering control system for spunlace non-woven fabric production is proposed.

[0008] In the technical solution, based on the existing fiber raw material opening machine, the controller, motor I, motor II, photoelectric switch, weighing sensor, electromagnetic valve, frequency converter I and frequency converter II are arranged to automatically adjust the speed of the angle nail curtain, so that the feeding speed of each opening machine remains relatively constant. The accuracy of the weighing is ensured by automatically adjusting the pre-stopping weight, and finally the accuracy of the fiber raw material batching and metering is ensured. At the same time, it can better cooperate with the fiber raw material batching and metering process for spunlace non-woven fabric production.

[0009] In order to achieve the above technical purpose, the following technical solution is proposed:

[0010] The purpose of the technical solution is to provide a fiber raw material batching and metering control system for spunlace non-woven fabric production, which is arranged in a fiber raw material opening machine. The fiber raw material opening machine includes a conveying curtain, an angle nail curtain and a hopper. The conveying curtain is arranged in front of the working position of the angle nail curtain, and the hopper is arranged behind the working position of the angle nail curtain. The angle nail curtain is arranged obliquely upward. One side of the angle nail curtain is provided with a cotton equalizing beater, and the other side of the angle nail curtain is provided with a cotton stripping beater. An active door controlled by a cylinder is arranged in the discharge port of the hopper, and a coarse opening cotton machine is arranged behind the working position of the hopper.

[0011] The fiber raw material batching and metering control system includes a controller, a motor I for driving the operation of the angle nail curtain, a motor II for driving the operation of the conveying curtain, a photoelectric switch arranged in the observation window of the angle nail curtain, a weighing sensor arranged on the hopper, and an electromagnetic valve for controlling the material falling.

[0012] Controller: including sequence control unit, human-computer interaction unit, angle nail curtain speed control unit, conveying curtain stop control unit, weight analysis unit and blanking control unit, the sequence control unit is connected with the human-computer interaction unit, the sequence control unit is connected with the angle nail curtain speed control unit, the sequence control unit is connected with the conveying curtain stop control unit, the sequence control unit is connected with the weight analysis unit, and the sequence control unit is connected with the blanking control unit;The human-computer interaction unit is connected with the angle nail curtain speed control unit, the human-computer interaction unit is connected with the conveying curtain stop control unit, the human-computer interaction unit is connected with the weight analysis unit, and the human-computer interaction unit is connected with the blanking control unit;

[0013] Motor I: motor I is provided with frequency converter I, and frequency converter I is connected with angle nail curtain speed control unit through electric signal. Among them, the angle nail curtain is driven by motor I, motor I is connected with frequency converter I, and the speed of angle nail curtain is adjusted through frequency converter I;Frequency converter I is connected with angle nail curtain speed control unit in controller, and angle nail curtain speed control unit calculates the time length from starting to stopping of angle nail curtain through built-in timer, which is defined as "loading time". Angle nail curtain speed control unit adjusts the frequency setting value of frequency converter I according to the loading time to control the speed of angle nail curtain;

[0014] Motor II: motor II is provided with frequency converter II, and frequency converter II is connected with conveying curtain stop control unit through electric signal. Among them, the conveying curtain is driven by motor II, motor II is connected with frequency converter II, and the operation of conveying curtain is adjusted through frequency converter II;Frequency converter II is connected with conveying curtain stop control unit in controller, and photoelectric switch is connected with conveying curtain stop control unit through electric signal. When the fiber raw material transported on the conveying curtain reaches the angle nail curtain position, the photoelectric switch will be triggered, the electric signal of the photoelectric switch is received by the conveying curtain stop control unit, then the motor II is controlled through the frequency converter II, and finally the conveying curtain is controlled to stop, and the angle nail curtain starts to transport fiber raw material;

[0015] Weighing sensor: weighing sensor is connected with weight analysis unit through electric signal. Among them, the weighing sensor is used for real-time monitoring the current weight (W 当前 ) of fiber raw material in the hopper;

[0016] Solenoid valve: solenoid valve is connected with air cylinder through air source pipe, and solenoid valve is connected with blanking control unit through electric signal.

[0017] Further, the angle nail curtain speed control unit comprises a frequency converter I operation frequency receiving module, a timer, a feeding time calculation module and a frequency converter I operation frequency communication module, the frequency converter I operation frequency receiving module is connected with the frequency converter I, the frequency converter I operation frequency receiving module is also connected with the feeding time calculation module, and the timer is connected with the feeding time calculation module; the feeding time calculation module is connected with the frequency converter I operation frequency communication module, and the frequency converter I operation frequency communication module is connected with the frequency converter I;

[0018] The frequency converter I operation frequency receiving module is used for monitoring the operation state of the frequency converter I, that is, receiving the operation frequency feedback from the frequency converter I.

[0019] The timer is used for calculating the duration from the start to the stop of the angle nail curtain, that is, the duration is the "feeding time".

[0020] The feeding time calculation module is used for adjusting the frequency setting value of the frequency converter I in combination with the operation frequency feedback of the frequency converter I and the feeding time, and conveying the instruction to the frequency converter I operation frequency communication module.

[0021] The frequency converter I operation frequency communication module conveys the adjusted frequency converter I operation frequency instruction to the frequency converter I, that is, controls the speed of the angle nail curtain.

[0022] Further, the conveying curtain stop control unit comprises a photoelectric switch signal receiving module, a stop operation analysis module and a frequency converter II operation frequency communication module, the photoelectric switch signal receiving module is connected with the photoelectric switch, the photoelectric switch signal receiving module is also connected with the stop operation analysis module, the stop operation analysis module is connected with the frequency converter II operation frequency communication module, and the frequency converter II operation frequency communication module is connected with the frequency converter II.

[0023] The photoelectric switch signal receiving module is used for monitoring the position of the fiber raw material, that is, receiving the information feedback from the photoelectric switch.

[0024] The stop operation analysis module is used for analyzing the position of the fiber raw material, and sending the instruction of stopping the conveying curtain transportation to the frequency converter II through the frequency converter II operation frequency communication module.

[0025] The frequency converter II operation frequency communication module receives and conveys the instruction of stopping the conveying curtain operation.

[0026] The working process involved includes:

[0027] "Calculate the actual parking weight": the weight analysis unit calculates the actual parking weight (W 停车 ) of the current weighing, W 停车 =W 目标 +W 总偏差（n） (n is the weighing round, n=1 when the first weighing is performed).

[0028] "Feeding": the angle pin curtain speed control unit controls the frequency converter I to start the motor I. The current weight (W 当前 ) of the fiber raw material in the hopper is collected in real time by the weighing sensor installed at the hopper and fed back to the weight analysis unit; when W 当前 ≥ W 停车 , the angle pin curtain speed control unit controls the frequency converter I to stop the motor I, and enters the "feeding complete" step;

[0029] "Feeding complete": the controller judges the current stage of the fiber raw material unpacking machine, and when all the fiber raw material unpacking machines are in the "feeding complete" step, it enters the "calculating deviation weight and total deviation weight" step;

[0030] "Calculating deviation weight and total deviation weight": the weight analysis unit calculates the deviation weight (W 偏差 ) and the deviation weight cumulative value (W 总偏差 ) of this weighing, W 偏差 = W 目标 -W 当前 , W 总偏差(n+1) =W 总偏差（n） +W 偏差 (n is the weighing round, n=1 for the first weighing round);

[0031] "Feeding": the feeding control unit sends the cotton falling instruction to the fiber raw material unpacking machine, and the electromagnetic valve in the fiber raw material unpacking machine receives the cotton falling instruction, then opens the movable door through the cylinder to complete the feeding. After the feeding is completed, it re-enters the "calculating actual parking weight" step to circulate.

[0032] Further, the fiber raw material batching and metering control system further comprises an audible and visual alarm for prompting, and the controller further comprises a warning unit, which is connected with the sequence control unit, the warning unit is connected with the man-machine interaction unit, and the warning unit is connected with the audible and visual alarm.

[0033] Further, the man-machine interaction unit is connected with a touch screen, and an operator can set a target weight (W 目标 ) and start the device by means of the touch screen; after the device is started, the controller will guide the fiber raw material unpacking machine to perform the cycle operation of "calculating actual parking weight" (completed by the weight analysis unit) → "feeding" (completed by the conveying curtain stop control unit and the angle pin curtain speed control unit) → "feeding complete" → "calculating deviation weight and total deviation weight" (completed by the weight analysis unit) → "feeding" until the operator issues a stop instruction on the touch screen.

[0034] The positional relationship of "middle", "front side of the station", "inner", "rear side of the station", "obliquely upward", "one side", "the other side", "inner" and the like in the technical solution is defined according to the actual use state, is a conventional term in the technical field, and is also a conventional term of the person skilled in the art in the actual use process.

[0035] In the description of the technical solution, it should be noted that, unless otherwise explicitly specified and limited, "arrangement" and "connection" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, or electrically connected, can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0036] The technical scheme has the beneficial technical effects that:

[0037] In the utility model, in the existing conventional fiber raw material unpacking machine, through the arrangement of the controller, motor I, motor II, photoelectric switch, weighing sensor, electromagnetic valve, frequency converter I and frequency converter II, the speed of the angle nail curtain is automatically adjusted, so that the feeding speed of each unpacking machine is relatively constant; the accuracy of weighing is ensured by automatically adjusting the pre-stopping weight; and the feeding of the angle nail curtain is facilitated, that is, the stability and sustainability of the feeding process are ensured;

[0038] Finally, the accuracy of fiber raw material batching and metering is ensured, and the fiber raw material batching and metering process for the production of spunlace non-woven fabric is better matched, which indirectly ensures the sustainability of the subsequent process and the quality of the spunlace non-woven fabric product. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 The structure diagram of the fiber raw material unpacking machine involved in the utility model is shown in the figure;

[0040] Figure 2 The logic connection block diagram of the control system in the utility model is shown in the figure;

[0041] Figure 3 The structure block diagram of the controller in the utility model is shown in the figure;

[0042] Figure 4 The working principle diagram of the angle nail curtain speed control unit in the controller in the utility model is shown in the figure;

[0043] Figure 5 The working principle diagram of the conveying curtain stop control unit in the controller in the utility model is shown in the figure;

[0044] Figure 6The control logic diagram of the gaff curtain speed in Example 6;

[0045] Figure 7 The logic control diagram of the early parking weight in Example 7;

[0046] In the figure, 1, conveying curtain, 2, gaff curtain, 3, hopper, 4, even cotton beater, 5, stripping beater, 6, weighing sensor, 7, coarse opener; 8, controller, 81, sequence control unit, 82, man-machine interaction unit, 83, gaff curtain speed control unit, 831, frequency converter I running frequency receiving module, 832, timer, 833, feeding time calculation module, 834, frequency converter I running frequency communication module, 84, conveying curtain stop control unit, 841, photoelectric switch signal receiving module, 842, stop running analysis module, 843, frequency converter II running frequency communication module, 85, weight analysis unit, 86, material falling control unit, 87, early warning unit; 9, motor I, 10, motor II, 11, photoelectric switch, 12, electromagnetic valve, 13, frequency converter I, 14, frequency converter II, 15, audible and visual alarm, 16, air cylinder. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0048] Example 1:

[0049] The embodiment provides a fiber raw material batching and metering control system for spunlace nonwoven fabric production, which is arranged in a fiber raw material unpacking machine, the fiber raw material unpacking machine comprises a conveying curtain 1, a gaff curtain 2 and a hopper 3, the conveying curtain 1 is arranged on the front side of the work station of the gaff curtain 2, and the hopper 3 is arranged on the rear side of the work station of the gaff curtain 2; the gaff curtain 2 is arranged obliquely upwards, and a movable door controlled to be opened and closed by the air cylinder 16 is arranged in the discharge opening of the hopper 3;

[0050] The fiber raw material batching metering control system comprises a controller 8, a motor I 9 driving the operation of the angle nail curtain 2, a motor II 10 driving the operation of the conveying curtain 1, a photoelectric switch 11 arranged at the observation window of the angle nail curtain 2, a weighing sensor 6 arranged on the hopper 3, and a solenoid valve 12 for controlling the dropping of the material, the motor I 9 is provided with a frequency converter I 13, and the frequency converter I 13 is connected with the controller 8 through an electrical signal; the motor II 10 is provided with a frequency converter II 14, and the frequency converter II 14 is connected with the controller 8 through an electrical signal; the solenoid valve 12 is connected with the controller 8 through an electrical signal, and the solenoid valve 12 is connected with a gas cylinder 16 through a gas source pipe; the photoelectric switch 11 and the weighing sensor 6 are both connected with the controller 8 through an electrical signal.

[0051] Based on the existing fiber raw material bale opener, through the settings of the controller 8, the motor I 9, the motor II 10, the photoelectric switch 11, the weighing sensor 6, the solenoid valve 12, the frequency converter I 13, and the frequency converter II 14, the running speed of the angle nail curtain 2 is adjusted, the operation of the conveying curtain 1 is controlled to stop or the movable door is opened and closed. For multiple fiber raw material bale openers, the speed of the angle nail curtain 2 is automatically adjusted to keep the feeding speed of each bale opener relatively constant, the weight at which the bale opener stops is automatically adjusted to ensure the accuracy of the weighing, and a closed-loop control mode is adopted, so that the parameters involved are automatically calculated by the control algorithm according to the actual environment, without the need for manual adjustment, and finally the accuracy of the fiber raw material batching metering is ensured.

[0052] Embodiment 2

[0053] Based on the embodiment 1, the controller 8 is further limited in this embodiment to further illustrate the technical solution.

[0054] As shown in Figure 3 the controller 8 comprises a sequence control unit 81, a man-machine interaction unit 82, an angle nail curtain speed control unit 83, a conveying curtain stop control unit 84, a weight analysis unit 85, and a material dropping control unit 86, the sequence control unit 81 is connected with the man-machine interaction unit 82, the sequence control unit 81 is connected with the angle nail curtain speed control unit 83, the sequence control unit 81 is connected with the conveying curtain stop control unit 84, the sequence control unit 81 is connected with the weight analysis unit 85, and the sequence control unit 81 is connected with the material dropping control unit 86; the man-machine interaction unit 82 is connected with the angle nail curtain speed control unit 83, the man-machine interaction unit 82 is connected with the conveying curtain stop control unit 84, the man-machine interaction unit 82 is connected with the weight analysis unit 85, and the man-machine interaction unit 82 is connected with the material dropping control unit 86;

[0055] The motor I 9 is provided with a frequency converter I 13, and the frequency converter I 13 is connected with the angle pin curtain speed control unit 83 through an electrical signal. The angle pin curtain 2 is driven by the motor I 9, the motor I 9 is connected with the frequency converter I 13, and the speed of the angle pin curtain 2 is adjusted through the frequency converter I 13; the frequency converter I 13 is connected with the angle pin curtain speed control unit 83 in the controller 8, the angle pin curtain speed control unit 83 calculates the time length from starting to stopping of the angle pin curtain 2 through the built-in timer 832, and the time length is defined as “loading time”; the angle pin curtain speed control unit 83 adjusts the frequency setting value of the frequency converter I 13 according to the loading time, so as to control the speed of the angle pin curtain 2;

[0056] The motor II 10 is provided with a frequency converter II 14, and the frequency converter II 14 is connected with the conveying curtain stop control unit 84 through an electrical signal. The conveying curtain 1 is driven by the motor II 10, the motor II 10 is connected with the frequency converter II 14, and the operation of the conveying curtain 1 is adjusted through the frequency converter II 14; the frequency converter II 14 is connected with the conveying curtain stop control unit 84 in the controller 8, and the photoelectric switch 11 is connected with the conveying curtain stop control unit 84 through an electrical signal. When the fiber raw material conveyed on the conveying curtain 1 reaches the position of the angle pin curtain 2, the photoelectric switch 11 is triggered, the conveying curtain stop control unit 84 receives the electrical signal of the photoelectric switch 11, then controls the motor II 10 through the frequency converter II 14, and finally controls the conveying curtain 1 to stop, and the angle pin curtain 2 starts to convey the fiber raw material;

[0057] The weighing sensor 6 is connected with the weight analysis unit 85 through an electrical signal. The weighing sensor is used to monitor the current weight (W 当前 ) of the fiber raw material in the hopper in real time;

[0058] The movable door is opened and closed by the air cylinder, the air cylinder is connected with the electromagnetic valve through the air source pipe, and the electromagnetic valve is connected with the material falling control unit through an electrical signal.

[0059] The working process includes:

[0060] “Calculate the actual parking weight”: the weight analysis unit calculates the actual parking weight (W 停车 ) of the current weighing, W 停车 =W 目标 +W 总偏差（n） (n is the weighing round, and n=1 when the first weighing is performed);

[0061] “Loading”: the angle pin curtain speed control unit controls the frequency converter I to start the motor I. The current weight (W 当前 ) of the fiber raw material in the hopper is collected in real time through the weighing sensor installed at the hopper and is fed back to the weight analysis unit; when W 当前 ≥W 停车 , the angle pin curtain speed control unit controls the frequency converter I to stop the motor I, and enters the “loading completion” step;

[0062] “Finished feeding”: the controller determines the stage in which all the fiber raw material unpacking machines are currently located, and when all the fiber raw material unpacking machines are in the “Finished feeding” step, the “Calculate deviation weight and total deviation weight” step is entered;

[0063] “Calculate deviation weight and total deviation weight”: the weight analysis unit calculates the deviation weight (W 偏差 ) of the current weighing and the deviation weight cumulative value (W 总偏差 ), W 偏差 = W 目标 -W 当前 , W 总偏差(n+1) =W 总偏差（n） +W 偏差 (n is the weighing round, n=1 for the first weighing round);

[0064] “Drop material”: the drop material control unit sends a drop cotton instruction to the fiber raw material unpacking machine, and the electromagnetic valve in the fiber raw material unpacking machine receives the drop cotton instruction, then opens the movable door through the cylinder control to complete the drop material. After the drop material is completed, the “Calculate actual parking weight” step is re-entered for circulation.

[0065] Example 3:

[0066] On the basis of examples 1-2, this embodiment further limits the corner nail curtain speed control unit 83 to further illustrate the technical solution.

[0067] As shown in Figure 4 , the corner nail curtain speed control unit 83 includes a frequency converter I operation frequency receiving module 831, a timer 832, a feeding time calculation module 833, and a frequency converter I operation frequency communication module 834. The frequency converter I operation frequency receiving module 831 is connected with the frequency converter I 13, and is also connected with the feeding time calculation module 833. The timer 832 is connected with the feeding time calculation module 833. The feeding time calculation module 833 is connected with the frequency converter I operation frequency communication module 834, and the frequency converter I operation frequency communication module 834 is connected with the frequency converter I 13.

[0068] Among them, the frequency converter I operation frequency receiving module 831 is used to receive the operation frequency feedback from the frequency converter I 13, and monitor the operation state of the frequency converter I 13.

[0069] The timer 832 is used to calculate the duration from the start to the stop of the corner nail curtain 2, that is, the duration is the feeding time.

[0070] The feeding time calculation module 833 is used for combining the running frequency feedback of the frequency converter I 13 and the feeding time, adjusting the frequency setting value of the frequency converter I 13, and conveying the instruction to the frequency converter I running frequency communication module 834.

[0071] The frequency converter I running frequency communication module 834 is used for conveying the adjusted frequency converter I 13 running frequency instruction to the frequency converter I 13, that is, controlling the speed of the angle nail curtain 2.

[0072] Embodiment 4:

[0073] On the basis of embodiments 1-3, the conveying curtain stopping control unit 84 is further limited in this embodiment to further illustrate the technical solution.

[0074] As shown in Figure 5 The conveying curtain stopping control unit 84 includes a photoelectric switch signal receiving module 841, a stopping running analysis module 842 and a frequency converter II running frequency communication module 843. The photoelectric switch signal receiving module 841 is connected with the photoelectric switch 11, and is also connected with the stopping running analysis module 842. The stopping running analysis module 842 is connected with the frequency converter II running frequency communication module 843, and the frequency converter II running frequency communication module 843 is connected with the frequency converter II 14.

[0075] The photoelectric switch signal receiving module 841 is used for receiving the information feedback from the photoelectric switch 11 to monitor the position of the fiber raw material.

[0076] The stopping running analysis module 842 is used for analyzing the position of the fiber raw material, issuing the instruction of stopping the conveying curtain 1 transportation, and conveying the instruction to the frequency converter II running frequency communication module 843.

[0077] The frequency converter II running frequency communication module 843 is used for receiving and conveying the instruction of stopping the conveying curtain 1 running to control the conveying curtain 1 to stop.

[0078] Embodiment 5:

[0079] On the basis of embodiments 1-4, in order to timely feedback the fiber raw material batching and metering situation to the staff, prompt the real-time working condition, this embodiment is further limited as follows:

[0080] The fiber raw material batching and metering control system further includes an audible and visual alarm 15, and the controller 8 further includes a pre-warning unit 87. The pre-warning unit 87 is connected with the man-machine interaction unit 82, and is connected with the audible and visual alarm 15.

[0081] The man-machine interaction unit is connected with a touch screen, and the operator can set the target weight (W 目标) and start the equipment; after the equipment is started, the controller will guide the fiber raw material unpacking machine to perform the cycle operation of "calculating the actual parking weight" (completed by the weight analysis unit) -> "feeding" (completed jointly by the conveying curtain stop control unit and the angle nail curtain speed control unit) -> "feeding completion" -> "calculating the deviation weight and the total deviation weight" (completed by the weight analysis unit) -> "material falling" until the operator issues a stop instruction on the touch screen.

[0082] Embodiment 6:

[0083] Based on Embodiments 1-5, this embodiment provides a fiber raw material batching metering control method suitable for spunlace non-woven fabric production, as shown in Figure 6 which includes control of the angle nail curtain speed:

[0084] S1 calculates the feeding time (T / s);

[0085] The feeding time specifically refers to that the angle nail curtain speed control unit calculates the time length from the start to the stop of the angle nail curtain by using the built-in timer, which is the "feeding time";

[0086] S2 compares the feeding time in step S1 with the pre-set optimal feeding time, and adjusts the speed of the angle nail curtain according to the difference; specifically including the following:

[0087] If the feeding time is 0<T≤5s, the feeding speed of the angle nail curtain is too fast, and the speed of the angle nail curtain is reduced by 2Hz (where Hz is the frequency unit, and the frequency converter I controls the speed of the motor I by controlling the output frequency, so it can be directly used as a physical quantity reflecting the speed of the motor I);

[0088] If the feeding time is 5<T≤10s, the feeding speed of the angle nail curtain is relatively fast, and the speed of the angle nail curtain is reduced by 1Hz;

[0089] If the feeding time is 10<T≤15s, the feeding speed of the angle nail curtain is suitable; the speed of the angle nail curtain is kept unchanged;

[0090] If the feeding time is 15<T≤20s, the feeding speed of the angle nail curtain is relatively slow, and the speed of the angle nail curtain is increased by 1Hz;

[0091] If the feeding time is 20<T≤50s, the feeding speed of the angle nail curtain is too slow, and the speed of the angle nail curtain is increased by 2Hz;

[0092] If the feeding time is >50s, the feeding of the angle nail curtain is abnormal, the speed of the angle nail curtain is kept unchanged, and an alarm is given. Thus, the feeding speed of each unpacking machine is basically kept constant.

[0093] Embodiment 7:

[0094] Based on Example 6, this example further controls the weight of early stopping, such as... Figure 7 As shown, it specifically includes:

[0095] X1 sets the target weighing value W 目标 Start the fiber raw material unpacking machine;

[0096] X2 calculates the parking weight W 停车 Among them, W 停车 =W 目标 +W 总偏差(n) (n is the weighing round; n=1 for the first weighing round)

[0097] X3 starts motor I and begins feeding;

[0098] X4 determines the current weight W of the fiber raw material. 当前 With W 停车 The relationship between them;

[0099] If W 当前 ≥W 停车 If the time is right, then motor I will stop and the subsequent material loading process will begin.

[0100] Conversely, control motor I to continue feeding materials;

[0101] X5 determines whether all fiber raw material unpacking machines involved in fiber raw material batching have completed feeding;

[0102] If any fiber raw material unpacking machine is not in the feeding completion step, continue to wait;

[0103] If all fiber raw material unpacking machines are in the feeding completion step, then proceed to the subsequent deviation calculation program;

[0104] X6 calculates the deviation weight W 偏差 Among them, W 偏差 = W 目标 -W 当前 ; Calculate the total deviation weight W 总偏差 Among them, W 总偏差(n+1) =W 总偏差（n） +W 偏差 (n is the weighing round, and n=1 for the first weighing round).

[0105] X7 sends a cotton dropping instruction to the fiber raw material unpacking machine, waits for 8 seconds, and then returns to step X2.

[0106] Example 8:

[0107] This embodiment, combined with an actual production line, provides, as another implementation method, a fiber raw material metering and control system suitable for spunlace nonwoven fabric production, the specific construction of which includes:

[0108] Step 1, connecting elements in the system

[0109] Motor I and frequency converter I are connected by electrical signals, frequency converter I provides power to motor I and controls the speed; frequency converter I and angle nail curtain speed control unit are connected by electrical signals, frequency converter I transmits running state signal and frequency feedback signal to angle nail curtain speed control unit, angle nail curtain speed control unit transmits motor enable signal and frequency given signal to frequency converter I; motor II and frequency converter II are connected by electrical signals, frequency converter II provides power to motor II and controls the speed; frequency converter II and conveying curtain speed control unit are connected by electrical signals, frequency converter II transmits frequency feedback signal to conveying curtain speed control unit, conveying curtain speed control unit transmits motor enable signal and frequency given signal to frequency converter; photoelectric switch and conveying curtain speed control unit are connected by electrical signals, conveying curtain speed control unit judges whether the raw material on the conveying curtain is transported to the angle nail curtain position by reading the photoelectric switch turntable; weighing sensor and weight analysis unit are connected by electrical signals, weighing sensor transmits the current weight of the fiber in the hopper to the weight analysis unit; solenoid valve and material falling control unit are connected by electrical signals, material falling control unit controls the action of the air cylinder through the solenoid valve, and then controls the opening and closing of the discharge port movable door.

[0110] Step 2, establishing human-computer interaction unit

[0111] Human-computer interaction unit connects touch screen and sound-light alarm, through programming the touch screen, the operator can control the whole equipment start-stop, set the target weight, view the current weight of the fiber in the hopper, view the frequency given and frequency feedback of frequency converter I and frequency converter II, and view the alarm information through the touch screen; when the system generates alarm information, human-computer interaction unit will control the sound-light alarm to act until the alarm is eliminated.

[0112] Step 3, establishing sequence control unit

[0113] The sequence control unit includes a bale opener loading step control. When the device is started, the sequence control unit will guide the fiber raw material bale opener to perform the cycle operation of "calculating actual parking weight" → "loading" → "loading complete" → "calculating deviation weight and total deviation weight" → "falling material", until the operator issues a stop instruction on the touch screen. When the operator presses the start button, the sequence control unit sets the bale opener step to "calculating actual parking weight", and sends a calculating actual parking weight instruction to the weight analysis unit. Then the sequence control unit sets the bale opener step to "loading", and sends a loading instruction to the angle pin curtain speed control unit, the conveying curtain speed control unit, and the weight analysis unit. After receiving the loading complete signal sent by the weight analysis unit, the sequence control unit sets the bale opener step to "loading complete", and sends a loading complete instruction to the angle pin curtain speed control unit and the conveying curtain speed control unit. After all bale openers are in the "loading complete" step, the sequence control unit sets the bale opener step to "calculating deviation weight and total deviation weight", and sends a calculating deviation weight and total deviation weight instruction to the weight analysis unit. Then the sequence control unit sets the bale opener step to "falling material", and sends a falling material instruction to the falling material control unit. After receiving the falling material complete signal sent by the falling material control unit, the sequence control unit controls the bale opener to perform the next round of weighing, and sets the bale opener step to "calculating actual parking weight", and the cycle is repeated.

[0114] Step 4, establishing the angle pin curtain speed control unit

[0115] The angle pin curtain speed control unit specifically comprises calculating the feeding time, calculating the frequency given by the frequency converter I, obtaining the frequency feedback of the frequency converter I, and controlling the start of the frequency converter I. When the angle pin curtain speed control unit receives the feeding instruction from the sequence control unit, the angle pin curtain speed control unit starts the internal timer, begins timing, and transmits the enable signal to the frequency converter I to control the start of the frequency converter I, so that the motor I rotates to drive the angle pin curtain to advance; when the angle pin curtain speed control unit receives the feeding completion instruction from the sequence control unit, the angle pin curtain speed control unit stops the internal timer, ends timing, calculates the time length, defines the time length as the feeding time (T), and stops transmitting the enable signal to the frequency converter I to control the stop of the frequency converter I, so that the motor I stops and the angle pin curtain stops. According to the statistical data analysis of the production line, the feeding time should be controlled between 10-15 seconds, which can meet the cotton supply efficiency of the opening machine backward, and can also avoid the over-shooting of the weighing reading, and the uncontrolled weight of the fiber in the hopper. The feeding time is further divided into six time intervals. If the feeding time is 0<T≤5s, the feeding speed of the angle pin curtain is too fast, the frequency of the frequency converter I is reduced by 2Hz; if the feeding time is 5<T≤10s, the feeding speed of the angle pin curtain is fast, the frequency of the frequency converter I is reduced by 1Hz; if the feeding time is 10<T≤15s, the feeding speed of the angle pin curtain is suitable; the frequency of the frequency converter I remains unchanged; if the feeding time is 15<T≤20s, the feeding speed of the angle pin curtain is slow, the frequency of the frequency converter I is increased by 1Hz; if the feeding time is 20<T≤50s, the feeding speed of the angle pin curtain is too slow, the frequency of the frequency converter I is increased by 2Hz; if the feeding time is >50s, there may be no raw material on the conveying curtain, the angle pin curtain speed control unit generates an alarm information, which is forwarded to the human-computer interaction unit through the sequence control unit, and finally the human-computer interaction unit controls the sound and light alarm to prompt the operator to handle.

[0116] Step 5, establishing the conveying curtain speed control unit

[0117] The conveying curtain speed control unit specifically comprises reading photoelectric switch state, setting variable frequency converter II given frequency, obtaining variable frequency converter II frequency feedback, and controlling variable frequency converter II start. When the conveying curtain speed control unit receives the feeding instruction of the sequence control unit, the conveying curtain speed control unit reads the photoelectric switch state. When the photoelectric switch is in the light transmission state, it is considered that the raw material on the conveying curtain has not reached the gimp curtain position, and the conveying curtain speed control unit transmits an enable signal to the variable frequency converter II to control the variable frequency converter II to start, so that the motor II rotates to drive the conveying curtain to advance. When the photoelectric switch is in the light shielding state, it is considered that the raw material on the conveying curtain has reached the gimp curtain position, and the conveying curtain speed control unit stops transmitting the enable signal to the variable frequency converter II to control the variable frequency converter II to stop, so that the motor II stops, and further the conveying curtain stops. The given frequency of the conveying curtain is set through the human-computer interaction unit, and the frequency setting range is 5-50 Hz. The controller reads the feedback frequency of the variable frequency converter and displays it on the human-computer interaction unit.

[0118] Step 6, establishing a weight analysis unit

[0119] The weight analysis unit comprises reading the weighing sensor signal, calculating the actual parking weight, calculating the deviation weight and the total deviation weight. The weight analysis unit reads the signal of the weighing sensor and converts it into the current weight data (W 当前 ) of the hopper fiber. When the weight analysis unit receives the actual parking weight calculation instruction of the sequence control unit, the weight analysis unit calculates the actual parking weight of the current round according to the formula. W 停车 =W 目标 +W 总偏差(n) (n is the weighing round, n=1 when the first weighing, and W 总偏差(1) =0); when the weight analysis unit receives the feeding instruction of the sequence control unit, the weight analysis unit compares the relationship between the current weight W 当前 and W 停车 in real time. When W 当前 ≥W 停车 , the weight analysis unit sends a feeding completion signal to the sequence control unit; when the weight analysis unit receives the deviation weight and total deviation weight calculation instruction of the sequence control unit, the weight analysis unit calculates the deviation weight W 偏差 , wherein W 偏差 =W 目标 -W 当前 ; and calculates the total deviation weight W 总偏差 , wherein W 总偏差(n+1) =W 总偏差（n） +W 偏差 (n is the weighing round, n=1 when the first weighing, and W 总偏差(1) =0);

[0120] For example, the operator sets W 目标 as 2000g (W目标 = 2000 g

[0121] First round weighing, W 总偏差（1） = 0, calculated W 停车 = W 目标 + W 总偏差（1） = 2000 + 0 = 2000 g, this round weighing is according to 2000 g, when W 当前 ≥ W 停车 , the corner pin curtain stops, but in the process of stopping, the corner pin curtain still sends part of raw materials to the hopper due to inertia, therefore, after the weight is stable, there must be W 当前 > W 停车 , we assume that the amount of extra sending of the corner pin curtain is 200 g, and the weight does not change greatly in a short time, then W 当前 = 2000 + 200 = 2200 g of this round weighing;

[0122] In the calculation deviation step, W 偏差 = W 目标 - W 当前 = 2000 - 2200 = -200 g, W 总偏差（2） = W 总偏差（1） + W 偏差 = 0 + (-200) = -200 g

[0123] Second round weighing, W 停车 = W 目标 + W 总偏差（2） = 2000 + (-200) = 1800 g, this round weighing is according to 1800 g, when W 当前 ≥ W 停车 , the corner pin curtain stops, but in the process of stopping, similarly, the corner pin curtain still sends part of raw materials to the hopper, according to our previous assumption, for example, 200 g is additionally sent, then W 当前 = 1800 + 200 = 2000 g of this round weighing;

[0124] In the calculation deviation step, W 偏差 = W 目标 - W 当前 = 2000 - 2000 = 0, W 总偏差（3） = W 总偏差（2） + W 偏差 = -200 + 0 = -200 g

[0125] The subsequent round weighing is similar to the second round, and is not repeated.

[0126] Step 7, establishing a material falling control unit

[0127] The blanking control unit includes receiving blanking instruction of the sequence control unit, controlling the electromagnetic valve action through electric signal. When the blanking control unit receives the blanking instruction of the sequence control unit, the blanking control unit controls the air cylinder to extend through the electromagnetic valve, so that the movable door under the hopper is opened, the blanking is started, after maintaining the blanking action for 2 seconds, the blanking control unit controls the air cylinder to retract through the electromagnetic valve, so that the movable door under the hopper is closed, and sends the blanking completion signal to the sequence control unit.

[0128] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification or equivalent change of the above embodiment according to the technical essence of the present application falls within the protection scope of the present application.

Claims

1. A fiber raw material batching and metering control system for producing spunlace nonwoven fabric, characterized by, The application relates to a fiber raw material batching and metering control system which is arranged in a fiber raw material unpacking machine, the fiber raw material unpacking machine comprising a conveying curtain (1), a corner nail curtain (2) and a hopper (3), the conveying curtain (1) being arranged in front of the working position of the corner nail curtain (2), and the hopper (3) being arranged behind the working position of the corner nail curtain (2); the corner nail curtain (2) is arranged in an inclined upward direction, and a movable door which is controlled to be opened and closed by a cylinder (16) is arranged in the discharge opening of the hopper (3). The fiber raw material batching and metering control system comprises a controller (8), a motor I (9) for driving the corner nail curtain (2) to run, a motor II (10) for driving the conveying curtain (1) to run, a photoelectric switch (11) arranged on the observation window of the corner nail curtain (2), a weighing sensor (6) arranged on the hopper (3) and an electromagnetic valve (12) for controlling the material dropping. A frequency converter I (13) is arranged on the motor I (9), and the frequency converter I (13) and the controller (8) are connected through electrical signals. A frequency converter II (14) is arranged on the motor II (10), and the frequency converter II (14) and the controller (8) are connected through electrical signals. The cylinder (16) is connected with the electromagnetic valve (12) through a gas source pipe, and the electromagnetic valve (12) and the controller (8) are connected through electrical signals. The photoelectric switch (11) and the weighing sensor (6) are connected with the controller (8) through electrical signals.

2. The fiber raw material batching and metering control system for producing a hydroentangled nonwoven fabric according to claim 1, characterized by The controller (8) comprises a sequence control unit (81), a man-machine interaction unit (82), a corner nail curtain speed control unit (83), a conveying curtain stop control unit (84), a weight analysis unit (85) and a material dropping control unit (86). The corner nail curtain speed control unit (83), the conveying curtain stop control unit (84), the weight analysis unit (85) and the material dropping control unit (86) are connected with the sequence control unit (81); the corner nail curtain speed control unit (83), the conveying curtain stop control unit (84), the weight analysis unit (85) and the material dropping control unit (86) are also connected with the man-machine interaction unit (82). The frequency converter I (13) and the corner nail curtain speed control unit (83) are connected through electrical signals, the frequency converter II (14) and the conveying curtain stop control unit (84) are connected through electrical signals, the photoelectric switch (11) and the conveying curtain stop control unit (84) are connected through electrical signals, the weighing sensor (6) and the weight analysis unit (85) are connected through electrical signals, and the electromagnetic valve (12) and the material dropping control unit (86) are connected through electrical signals.

3. The fiber raw material batching and metering control system for producing a hydroentangled nonwoven fabric according to claim 2, characterized in that, The corner nail curtain speed control unit (83) comprises a frequency converter I running frequency receiving module (831), a timer (832), a feeding time calculation module (833) and a frequency converter I running frequency communication module (834), the frequency converter I running frequency receiving module (831) is connected with the frequency converter I (13), the frequency converter I running frequency receiving module (831) is also connected with the feeding time calculation module (833), and the timer (832) is connected with the feeding time calculation module (833); the feeding time calculation module (833) is connected with the frequency converter I running frequency communication module (834), and the frequency converter I running frequency communication module (834) is connected with the frequency converter I (13). The frequency converter I operation frequency receiving module (831) is configured to receive the operation frequency fed back by the frequency converter I (13) and monitor the operation state of the frequency converter I (13). The timer (832) is configured to calculate the time length from the start to the stop of the gill curtain (2), which is the feeding time. The feeding time calculation module (833) is configured to adjust the frequency setting value of the frequency converter I (13) in combination with the operation frequency fed back by the frequency converter I (13) and the feeding time, and convey the instruction to the frequency converter I operation frequency communication module (834). The frequency converter I operation frequency communication module (834) is configured to convey the adjusted operation frequency instruction of the frequency converter I (13) to the frequency converter I (13) to control the speed of the gill curtain (2).

4. The fiber raw material batching and metering control system for producing a hydroentangled nonwoven fabric according to claim 2, characterized in that, The conveying curtain stop control unit (84) comprises a photoelectric switch signal receiving module (841), a stop operation analysis module (842) and a frequency converter II operation frequency communication module (843). The photoelectric switch signal receiving module (841) is connected with the photoelectric switch (11), and is also connected with the stop operation analysis module (842). The stop operation analysis module (842) is connected with the frequency converter II operation frequency communication module (843), and the frequency converter II operation frequency communication module (843) is connected with the frequency converter II (14). The photoelectric switch signal receiving module (841) is configured to receive the information fed back by the photoelectric switch (11) and monitor the position of the fiber raw material. The stop operation analysis module (842) is configured to analyze the position of the fiber raw material, issue the instruction to stop the conveying curtain (1) from transporting, and convey the instruction to the frequency converter II operation frequency communication module (843). The frequency converter II operation frequency communication module (843) is configured to receive and convey the instruction to stop the operation of the conveying curtain (1) and control the conveying curtain (1) to stop.

5. The fiber raw material batching and metering control system for producing a spunlace nonwoven fabric according to any one of claims 2 to 4, characterized in that, The fiber raw material batching and metering control system further comprises an audible and visual alarm (15) for prompting. The controller (8) further comprises a pre-warning unit (87) connected with the sequence control unit (81), the pre-warning unit (87) is connected with the man-machine interaction unit (82), and the pre-warning unit (87) is connected with the audible and visual alarm (15).

6. The fiber material batching and metering control system for producing spunlace nonwoven fabric according to claim 5, wherein The man-machine interaction unit (82) is connected with a touch screen, and the audible and visual alarm (15) is connected with the touch screen.

7. The fiber raw material batching and metering control system for producing a hydroentangled nonwoven fabric according to claim 1, characterized by One side of the gill curtain (2) is provided with a cotton equalizing beater (4), and the other side of the gill curtain (2) is provided with a stripping beater (5). The work position rear side of the hopper (3) is provided with a coarse opening cotton machine (7).

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