CN111576067B - Automatic production line of coreless three-dimensional beautiful toilet paper - Google Patents

Automatic production line of coreless three-dimensional beautiful toilet paper Download PDF

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Publication number
CN111576067B
CN111576067B CN202010428686.XA CN202010428686A CN111576067B CN 111576067 B CN111576067 B CN 111576067B CN 202010428686 A CN202010428686 A CN 202010428686A CN 111576067 B CN111576067 B CN 111576067B
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pipe
valve
slurry
plc controller
pump
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CN111576067A (en
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洪胜
李志林
郑飞
刘亮华
陈中露
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Vinda Paper Zhejiang Co Ltd
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Vinda Paper Zhejiang Co Ltd
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/34—Kneading or mixing; Pulpers
    • D21B1/345—Pulpers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/224—Use of means other than pressure and temperature

Abstract

The invention relates to an automatic production line of coreless three-dimensional beautiful toilet paper, which comprises a pulping tank and a plc controller, wherein a pulping machine is arranged at the inner bottom of the pulping tank, a pulping pipe is connected to the bottom of the pulping tank, a pulping pump is arranged on the pulping pipe, a water adding pipe for adding water to dilute pulp is arranged at the top of the pulping tank, a water adding pump is arranged on the water adding pipe, a water adding flow regulating valve is arranged on the water adding pipe, and the plc controller is respectively electrically connected with the water adding flow regulating valve, the water adding pump and the pulping pump, and is characterized in that: and the water adding pipe is connected with a concentration compensation assembly which is used for compensating water to the slurry pumping pipe and is electrically connected with the plc controller and adjusting the concentration of slurry pumped. Compared with the prior art, the concentration of the slurry is adjusted by avoiding the need of an additional device in the subsequent step, the structure is simple, and the production cost is reduced.

Description

Automatic production line of coreless three-dimensional beautiful toilet paper
Technical Field
The invention relates to the technical field of toilet paper production, in particular to an automatic production line of coreless three-dimensional beautiful toilet paper.
Background
In the production process of coreless toilet paper, a series of parameters need to be strictly controlled in the paper making process from pulp board raw material to raw paper, and the pulp making part of the coreless toilet paper comprises pulp breaking, pulp grinding and pulp distribution, wherein the pulp making part comprises long-short fiber proportion, dilution and the like, in the existing pulp breaking process, the structure of the coreless toilet paper usually comprises a pulp breaking tank and a conveying belt which is positioned at the top of the pulp breaking tank and used for feeding, a liquid level meter is arranged on the inner wall of the pulp breaking tank, a pulp grinder is arranged at the bottom in the pulp breaking tank, a pulp pumping pipe is connected at the bottom of the pulp breaking tank, a pulp pumping pump is arranged on the pulp pumping pipe, a water adding pipe used for adding water and diluting pulp is arranged at the top of the pulp breaking tank, a water pump is arranged on the water adding pipe, a water adding flow regulating valve is arranged on the water adding pipe, and a plc controller which is respectively and electrically connected with the water adding flow regulating valve, the water pump, the pulp concentration is 5%, and the water adding amount is calculated and controlled by a PLC controller, and the formula W = W1 xn x (1-C) W + W1 xn x C of the concentration formula C1 is used for obtaining the formula W = W1 xn x (1-C) C1- (W1 xn x C), wherein: c1 is the pulping concentration; w1 is the weight of each pulp sheet; n is the number of pulp sheets to be fed; c is the water content of the pulp sheet; w is water to be added. Under the control of a plc controller, pulp board raw materials are sent into a pulping tank through a conveyer belt, a water pump starts to work and sends water into the pulping tank, a water adding flow regulating valve controls and feeds back flow to the plc controller in the water sending process, a pulper works for pulping, the pulp is pumped by a pulp pump in the continuous pulping process, the pulp is led out from a pulp pumping pipe to be used in the next production, in the actual running process, the concentration of the pulp led out from the pulp pumping pipe is extremely uneven, the concentration of the pulp in the pulping tank can be thickened along with the pulp pumping time, the instability of the concentration causes certain influence on the next production, the quality of toilet paper production is reduced, an additional device is needed for adjusting the concentration of the pulp, the structure is complex, the production cost is increased, and meanwhile, the phenomenon of pump blockage easily occurs at the pulp pumping pump, and frequent shutdown maintenance is needed, it takes long time and is inconvenient to maintain, the production efficiency is reduced, the pump is further damaged, and the production cost is greatly increased, so that improvement is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an automatic production line of coreless three-dimensional beautiful toilet paper, which has uniform concentration of slurry pumping slurry, is easy to clean due to pump blockage and does not influence the quality of the slurry.
The technical scheme of the invention is realized as follows: the utility model provides an automation line of three-dimensional beautiful toilet paper of centreless, includes garrulous thick liquid pond and plc controller, the bottom is provided with the pulper in the garrulous thick liquid pond, the garrulous thick liquid bottom of the pool portion is connected with the tube of pulping, be provided with the pump of pulping on the tube of pulping, garrulous thick liquid top is provided with the filler pipe that is used for adding water dilution thick liquid, be provided with the filler pump on the filler pipe, be provided with the flow control valve that adds water on the filler pipe, the plc controller is connected its characterized in that with adding water flow control valve, filler pump and pump electricity respectively: and the water adding pipe is connected with a concentration compensation assembly which is used for compensating water to the slurry pumping pipe and is electrically connected with the plc controller and adjusting the concentration of slurry pumped.
By adopting the technical scheme, under the control of the plc controller, the pulp board raw material is fed into the pulping tank, then the water pump starts working and feeds water into the pulping tank, the water feeding flow regulating valve controls and feeds back the flow to the plc controller in the water feeding process, the pulping machine works for pulping, the pulp pump operates for pulp pumping in the continuous pulping process, the pulp is led out from the pulp pumping pipe, in the continuous leading-out process, the water amount required to be added in real time when the pulp pumping concentration is 5 percent is calculated according to the pulp concentration circulating in the pulp pumping pipe by the plc controller, the concentration compensation component connected to the water feeding pipe correspondingly feeds water into the pulp pumping pipe according to the water amount calculated by the plc controller, the pulp pumping concentration is compensated and adjusted to keep the pulp outlet concentration to fluctuate between 4 and 6 percent so as to meet the production requirement and improve the production quality of sanitary paper, compared with the prior art, the concentration of the slurry is adjusted by avoiding the need of an additional device in the subsequent step, the structure is simple, and the production cost is reduced.
The invention is further configured to: concentration compensation subassembly is including installing concentration detection sensor, one end and water-feeding pipe connection and link that just is located on the slurry pumping pipe before the slurry pumping pump input end are located the compensating pipe between water flow control valve and the water-feeding pump and set up the dilution water-feeding control valve on the compensating pipe, the compensating pipe other end sets up between concentration detection sensor and slurry pumping pump with slurry pumping union coupling and link, concentration detection sensor and dilution water-feeding control valve are connected with the plc controller electricity respectively.
By adopting the technical scheme, under the control of a plc controller, the pulp board raw material is sent into a pulping tank, then a water pump starts to work and sends water into the pulping tank, the water adding flow regulating valve controls and feeds back the flow to the plc controller in the water sending process, a pulping machine works for pulping, the pulp pump operates for pulping in the continuous pulping process, the pulp is led out from a pulp pumping pipe, in the continuous leading-out process, a concentration detection sensor detects the concentration of the pulp in the pulp pumping pipe and feeds back the concentration to the plc controller, the plc controller calculates the water amount needed to be added for regulating the pulp concentration to be 5 percent based on the real-time pulp concentration circulating in the pulp pumping pipe, sends an electric signal to a dilution water adding regulating valve arranged on the compensating pipe, and the dilution water adding regulating valve controls the water inlet amount flowing from the compensating pipe to the pulp pumping pipe for diluting the pulp concentration according to the signal, the effect of compensating and controlling the fluctuation of the slurry concentration between 4 percent and 6 percent is achieved, so that the average slurry concentration of the slurry is about 5 percent, the production requirement is met, and the production quality of the toilet paper is improved.
The invention is further configured to: the pump of taking out the thick liquid includes the motor that is used for driving its forward or reverse pumping by plc controller control, be provided with on the motor and be used for detecting its actual energy consumption and feed back to the energy consumption monitoring feedback module of plc controller with plc controller electricity connection, be connected with on the thick liquid pipe and be used for filtering the thick liquid pump input end to block up fibrous filtration pipeline subassembly, the plc controller is based on energy consumption monitoring feedback module and the comparison of motor normal operating energy consumption default on the plc controller, transmits the signal of telecommunication to the thick liquid pump when exceeding the inside predetermined motor normal operating upper limit consumption value of plc controller, makes it stop back pump again and washs and make the jam fibre of thick liquid pump input end to filter in the filtration pipeline subassembly filtering.
By adopting the technical scheme, in the continuous pulping process, the pulp pumping pump operates to pump pulp, the pulp pumping pump normally operates to pump pulp in a forward direction, the current consumption of the motor is in a normal state, the energy consumption monitoring feedback module detects and feeds back the power consumption of the motor to the plc controller in the normal state, when more long fibers are partially or completely blocked in the pulp pumping pump, the load level of the motor is increased to cause the actual current consumption of the motor to be increased, the energy consumption monitoring feedback module detects the actual power consumption of the motor to be increased and feeds back the power consumption to the plc controller, when the actual power consumption exceeds the upper limit power consumption value preset in the plc controller during normal operation, the plc controller transmits an electric signal to the pulp pumping pump to enable the pulp pumping pump to perform reverse pumping after the pulp pumping pump stops operating, and the fibers blocked or partially blocked at the input end of the pulp pumping pump are conveyed to the filtering pipeline assembly to be filtered under the reverse rotation state of the motor, the energy consumption detection feedback module detects that the actual power consumption of the motor is recovered to the power consumption value in normal operation and feeds the power consumption value back to the plc controller, the plc controller drives the motor to reversely operate for a preset time and then stops, and then the normal operation and the forward pumping of the slurry are carried out.
The invention is further configured to: the filter pipeline component comprises a front on-off valve arranged in front of an input end of the slurry pump, a rear on-off valve arranged behind an output end of the slurry pump, a flushing tank, a conducting pipe with one end connected to the slurry pump between the front on-off valve and the slurry pump, and a three-way switching valve with an inlet end communicated with the other end of the conducting pipe, wherein two outlet ends of the three-way switching valve are respectively connected with the flushing tank through a first pipe and a second pipe, a valve core of the three-way switching valve has two switching states, the conducting pipe at the inlet end is communicated with the first pipe at the outlet end in a first state, the conducting pipe at the inlet end is communicated with the second pipe at the outlet end in a second state, the first pipe and the second pipe are respectively provided with a first filter box and a second filter box for filtering out blocking fibers, the flushing tank is connected with the slurry pump through a slurry supply pipe, and the connecting end is arranged between the rear on-off valve and the slurry pump, the utility model discloses a washing machine, including a washing pond, a mud pump, a PLC, a power supply pipe, a back-flow valve, a check valve that is arranged in one-way breakover washing pond mud to the mud pump in the washing pond, be provided with first break-make valve on the breakover pipe, the PLC is connected with preceding break-make valve, back-flow valve, a PLC, a first differential pressure sensor and a second differential pressure sensor that are connected with the PLC and are used for real-time detection of first filter tank and second filter tank entry end and exit end relative differential pressure and transmit to the PLC in real time respectively, be connected with the PLC on the washing.
By adopting the technical scheme, in the continuous pulping process, the pulp pumping pump operates to pump pulp, when more long fibers are partially or completely blocked in the pulp pumping pump during normal operation of the pulp pumping pump in the forward pulp pumping process, the energy consumption detection feedback module detects that the actual power consumption of the motor is increased and feeds the actual power consumption back to the plc controller, when the actual power consumption exceeds the upper limit power consumption value of the motor preset in the plc controller during normal operation, the plc controller transmits an electric signal to the pulp pumping pump to stop the pulp pumping pump, then the electric signals are respectively transmitted to the front on-off valve, the rear on-off valve and the first on-off valve to switch the front on-off valve and the rear on-off valve to the off state, the first on-off valve is in the on-state and transmits the electric signal to the pulp pumping pump to enable the pulp pumping pump to pump in the reverse direction, and during the reverse pumping process, pulp water stored in the flushing tank for cleaning is extracted, the pulp water reversely washes the pulp pump through the pulp water supply pipe, the pulp water mixed with the blocked fiber enters the first pipe after passing through the conduction pipe, the three-way switching valve is in the first state, the conduction pipe at the inlet end is communicated with the first pipe at the outlet end, the pulp water mixed with the blocked fiber enters the first pipe, in the process of passing through the first filter box, the blocked fiber in the pulp water is filtered and retained by the filter screen in the first filter box, the filtered pulp water flows back to the washing tank through the first pipe again to form a circulation, in the filtering and retaining process, the relative pressure difference value between the inlet end and the outlet end of the first filter box is monitored and fed back to the plc controller by the first pressure difference sensor arranged on the first filter box in real time, when the filter screen is blocked by the blocked fiber in the first filter box, the relative pressure difference value between the inlet end and the outlet end rises, and after most of the filter screen is blocked, the relative pressure difference value between the inlet end and the outlet end rises to exceed the preset value on the, at the moment, the plc controller transmits an electric signal to the three-way switching valve to switch the three-way switching valve to a second state, a conduction pipe at the inlet end of the three-way switching valve is communicated with a second pipe at the outlet end, the mixed and blocked fibers of the slurry pass through the second pipe and a second filter box, the blocked fibers are filtered at the second filter box, and simultaneously, the plc controller controls the back flushing control assembly to run to back flush the slurry to pass through the first filter box to discharge the blocked fibers, a filter screen in the first filter box is cleaned and regenerated, so that the filtering of the blocked fibers and the regeneration of the first filter box or the second filter box are simultaneously carried out, the first filter box and the second filter box are switched to ensure the rapid treatment and discharge of the fibers blocked at the pulp pump, the treatment efficiency and the automatic treatment effect of the pulp pump blockage are greatly improved, the power consumption detection feedback module detects that the actual power consumption of the motor is recovered to the power consumption value in normal operation and feeds back to the plc controller, the plc controller drives the motor to reversely operate for a preset time and then stop, then the plc controller transmits electric signals to the front on-off valve, the rear on-off valve and the first on-off valve respectively to enable the front on-off valve and the rear on-off valve to be switched to an on state and the first on-off valve to be switched to an off state, then the slurry pump normally operates to pump slurry in a forward direction, and in the pumping process, the slurry can be sent to the next production step only through the rear on-off valve in the on state due to the existence of the one-way valve after passing through the slurry pump.
The invention is further configured to: the reverse flushing control assembly comprises a flushing pipe, a flushing pump and a flushing three-way control valve, wherein one end of the flushing pipe is connected with a flushing pool, the flushing pump is arranged on the flushing pipe, the inlet end of the flushing three-way control valve is communicated with the other end of the flushing pipe, two outlet ends of the flushing three-way control valve are respectively connected with a first back flushing pipe and a second back flushing pipe, a valve core of the flushing three-way control valve has two switching states, the flushing pipe at the inlet end is communicated with the first back flushing pipe at the outlet end in the first state, the flushing pipe at the inlet end is communicated with the second back flushing pipe at the outlet end in the second state, one end of the first back flushing pipe, far away from the flushing three-way control valve, is connected with the first pipe, the connecting end of the first back flushing pipe is arranged between the first filter box and the flushing pool, one end of the second back flushing pipe, far away from the flushing three-way control valve, is connected with the second pipe, the connecting, be provided with first discharge on-off valve on the first discharge pipe, just be located and be connected with the second discharge pipe between three-way switch valve and the second filter tank on the second pipe, be provided with second discharge on-off valve on the second discharge pipe, the plc controller is connected with the washer pump, washes three-way control valve, first discharge on-off valve and second discharge on-off valve electricity respectively.
By adopting the technical scheme, in the continuous pulping process, the pulp pumping pump operates to pump pulp, when more long fibers are partially or completely blocked in the pulp pumping pump during normal operation of the pulp pumping pump in the forward pulp pumping process, the energy consumption detection feedback module detects that the actual power consumption of the motor is increased and feeds the actual power consumption back to the plc controller, when the actual power consumption exceeds the upper limit power consumption value of the motor preset in the plc controller during normal operation, the plc controller transmits an electric signal to the pulp pumping pump to stop the pulp pumping pump, then the electric signals are respectively transmitted to the front on-off valve, the rear on-off valve and the first on-off valve to switch the front on-off valve and the rear on-off valve to the off state, the first on-off valve is in the on-state and transmits the electric signal to the pulp pumping pump to enable the pulp pumping pump to pump in the reverse direction, and during the reverse pumping process, pulp water stored in the flushing tank for cleaning is extracted, the pulp water reversely washes the pulp pump through the pulp water supply pipe, the pulp water mixed with the blocked fiber enters the first pipe after passing through the conduction pipe, the three-way switching valve is in the first state, the conduction pipe at the inlet end is communicated with the first pipe at the outlet end, the pulp water mixed with the blocked fiber enters the first pipe, in the process of passing through the first filter box, the blocked fiber in the pulp water is filtered and retained by the filter screen in the first filter box, the filtered pulp water flows back to the washing tank through the first pipe again to form a circulation, in the filtering and retaining process, the relative pressure difference value between the inlet end and the outlet end of the first filter box is monitored and fed back to the plc controller by the first pressure difference sensor arranged on the first filter box in real time, when the filter screen is blocked by the blocked fiber in the first filter box, the relative pressure difference value between the inlet end and the outlet end rises, and after most of the filter screen is blocked, the relative pressure difference value between the inlet end and the outlet end rises to exceed the preset value on the, at this time, the plc controller transmits an electric signal to the three-way switching valve to switch the three-way switching valve to a second state, the conduction pipe at the inlet end of the three-way switching valve is communicated with the second pipe at the outlet end, the fiber mixed with the pulp and blocked is passed through the second pipe and the second filter box, the blocked fiber is filtered at the second filter box, and at the same time, the plc controller transmits an electric signal to the first discharge on-off valve, the second discharge on-off valve, the flush pump and the flush three-way control valve to switch the first discharge on-off valve to an on-state, the second discharge on-off valve is switched to an off-state, the flush three-way control valve is controlled to be switched to a first state, that is, the flush pipe at the inlet end thereof is communicated with the first backwash pipe at the outlet end, and under the operation of the flush pump, the pulp in the suction tank thereof passes through the flush pipe and the first backwash pipe in sequence and reversely flushes the first filter box to, cleaning and regenerating a filter screen in a first filter tank, after the blocked fibers are discharged, a first differential pressure sensor monitors and feeds back the relative differential pressure value of the inlet end and the outlet end of the first filter tank to a plc controller in real time, at the moment, the differential pressure is recovered to a normal state, the plc controller transmits an electric signal to a flushing pump to be closed so as to reduce the waste of slurry water, and simultaneously, the blocked fibers are filtered and regenerated by the first filter tank or a second filter tank, the first filter tank and the second filter tank are switched to ensure the rapid treatment and discharge of the fibers blocked at a slurry pump, the treatment efficiency and the automatic treatment effect of the slurry pump blockage are greatly improved, an energy consumption detection feedback module detects the power consumption value when the actual power consumption of a motor is recovered to a normal operation state and feeds back the power consumption value to the plc controller, the plc controller drives the motor to reversely operate for a preset time and then stop, and then the plc controller transmits the electric signal to a front on-off valve, a front, The back on-off valve and the first on-off valve enable the front on-off valve and the back on-off valve to be switched to an on state, the first on-off valve is switched to an off state, and then the slurry pump normally operates to pump slurry in a forward direction.
The invention also discloses a control production method suitable for the automatic production line of the coreless three-dimensional beautiful toilet paper, which is characterized by comprising the following steps:
s1, slurry pumping operation: feeding the pulp board raw material into a pulping tank, under the control of a plc controller, starting the operation of a water pump, feeding water into the pulping tank, controlling the flow rate by a water feeding flow rate regulating valve in the water feeding process, feeding back the flow rate to the plc controller, enabling a pulping machine to operate for pulping, and enabling a pulp pumping pump to operate for pulp pumping in the continuous pulping process;
s2, slurry pumping concentration control: the slurry is led out from the slurry pumping pipe, in the process of continuous leading-out, the concentration of the slurry in the slurry pumping pipe is detected by a concentration detection sensor and fed back to a plc controller, the plc controller calculates the water amount required to be added when the slurry concentration is adjusted to be 5% based on the real-time slurry concentration circulating in the slurry pumping pipe, an electric signal is sent to a dilution water adding adjusting valve, and the dilution water adding adjusting valve controls the water inflow amount flowing from a compensating pipe to the slurry pumping pipe to dilute the slurry concentration according to the signal to compensate and control the slurry concentration to be between 4% and 6%;
s3, blockage detection: when more long fibers are partially or completely blocked in the slurry pump, the energy consumption detection feedback module detects that the actual power consumption P of the motor is increased and feeds the actual power consumption P back to the plc controller, and when the actual power consumption P exceeds an upper limit power consumption value P1 when the motor preset in the plc controller normally runs, the plc controller transmits an electric signal to the slurry pump to stop running of the slurry pump;
s4, back flushing: the plc controller sends electrical signals to the front on-off valve, the rear on-off valve and the first on-off valve respectively to switch the front on-off valve and the rear on-off valve to an off state, and the first on-off valve is in an on state, then the plc controller transmits an electric signal to the slurry pump to enable the slurry pump to pump reversely, in the reverse pumping process, pumping the slurry stored in the flushing tank for cleaning, making the slurry reversely flush the slurry pump through the slurry supply pipe, after the fiber mixed and blocked by the slurry passes through the conduction pipe, the three-way switching valve is in a first state, the conduction pipe at the inlet end is communicated with the first pipe at the outlet end, the fiber mixed and blocked by the slurry enters the first pipe, in the process of passing through the first filter box, the blocking fibers in the slurry are filtered and retained by the filter screen in the first filter box, and the filtered slurry flows back to the flushing tank through the first pipe again to form a circulation;
s5, state judgment: in the filtering and retaining process, the energy consumption detection feedback module continuously detects the actual power consumption P of the motor and feeds the actual power consumption P back to the plc controller, and when the actual power consumption P of the motor is larger than the power consumption P2 when the motor normally runs, a first pressure difference sensor arranged on the first filter box monitors and feeds back the relative pressure difference value of the inlet end and the outlet end of the first filter box to the plc controller in real time;
s6, backflushing regeneration: when the relative differential pressure value of the inlet end and the outlet end of the first filter tank rises to exceed the preset upper limit differential pressure value in the plc controller, the plc controller transmits an electric signal to the three-way switching valve to switch the three-way switching valve to a second state, a conduction pipe at the inlet end of the three-way switching valve is communicated with a second pipe at the outlet end, fibers blocked by slurry and water in a mixed manner are filtered at the second filter tank through the second pipe and the second filter tank, and at the same time, the plc controller transmits an electric signal to a first discharge on-off valve, a second discharge on-off valve, a flushing pump and a flushing three-way control valve, the first discharge on-off valve is switched to the on-off state, the flushing three-way control valve controls to be switched to a first state, namely, the flushing pipe at the inlet end of the flushing three-way control valve is communicated with a first flushing pipe at the outlet end, and the flushing three-way control valve pumps pump is operated to pump the slurry in the pumping flushing tank in the flushing tank in sequence through the flushing pipe and the first return pipe to Discharging through a first discharge pipe, and cleaning and regenerating a filter screen in the first filter box;
s7, stopping for preparation: after the blocked fibers are discharged, the first differential pressure sensor monitors and feeds back the relative differential pressure value of the inlet end and the outlet end of the first filter box to the plc controller in real time, and when the relative differential pressure of the inlet end and the outlet end of the first filter box is equal to the differential pressure in a normal state, the plc controller transmits an electric signal to the flushing pump to close;
s8, cyclic regeneration: when the relative differential pressure value of the inlet end and the outlet end of the second filter box rises to exceed the preset upper limit differential pressure value in the plc controller, the plc controller transmits an electric signal to the three-way switching valve, so that the three-way switching valve is switched to a first state, a conduction pipe at the inlet end of the three-way switching valve is communicated with a first pipe at the outlet end, so that the fibers mixed and blocked by the slurry and the water pass through the first pipe and the first filter box again, the blocked fibers are filtered out at the first filter box again, and simultaneously, the plc controller transmits an electric signal to a first discharge on-off valve, a second discharge on-off valve, a flushing pump and a flushing three-way control valve, so that the first discharge on-off valve is switched to an off state, the second discharge on-off valve is switched to an on state, the flushing three-way control valve is switched to a second state, namely, a flushing pipe at the inlet end of the flushing three-way control valve is communicated with a second backwash pipe at the outlet end, and the flushing three-way control valve pumps draw the slurry in the flushing pool Discharging the mixed slurry from a second discharge pipe, and cleaning and regenerating a filter screen in the second filter tank;
s9, recovering normal slurry pumping: if the relative pressure difference value between the inlet end and the outlet end of the second filter box does not exceed the preset upper limit pressure difference value in the plc controller, the plc controller judges whether the actual power consumption P of the motor is less than or equal to the power consumption P2 when the motor normally runs, and if the actual power consumption P is kept to be greater than P2, the step returns to the step S5; if P is less than or equal to P2 at the moment, the plc transmits an electric signal to the motor, the motor stops after running for a preset time T1 in the reverse direction, then the plc controller transmits electric signals to the front on-off valve, the rear on-off valve and the first on-off valve respectively, so that the front on-off valve and the rear on-off valve are switched to an on state, the first on-off valve is switched to an off state, and then the slurry pump normally runs to pump slurry in the forward direction.
By adopting the technical scheme, the concentration detection sensor is adopted to detect the concentration of the slurry in the slurry pumping pipe and feed the detected concentration back to the plc controller, the plc controller calculates the water quantity required to be added when the slurry pumping concentration is 5% based on the real-time slurry concentration circulating in the slurry pumping pipe, an electric signal is sent to the diluting and water-adding regulating valve arranged on the compensating pipe, and the diluting and water-adding regulating valve controls the water inflow quantity of the diluted slurry flowing from the compensating pipe to the slurry pumping pipe according to the signal to achieve the effect of compensating and controlling the fluctuation of the slurry concentration between 4% and 6%, so that the slurry pumping concentration is about 5% on average, the production requirement is met, and the production quality of toilet paper is improved; when more long fibers are partially or completely blocked in the slurry pump, the energy consumption detection feedback module detects that the actual power consumption P of the motor rises and feeds the actual power consumption P back to the plc controller, and when the actual power consumption P exceeds an upper limit power consumption value P1 when the motor preset in the plc controller normally runs, the plc controller transmits an electric signal to the slurry pump to stop running of the slurry pump, so that the invalid power consumption of the slurry pump is reduced, and the internal damage of the slurry pump caused by continuous overload running is avoided; after the slurry pump is stopped, the plc controller respectively sends electric signals to the front on-off valve, the rear on-off valve and the first on-off valve to enable the front on-off valve and the rear on-off valve to be switched to an off state, the first on-off valve is in an on state, after the pipeline configuration is adjusted, the blocked fibers are discharged, the plc controller transmits the electric signals to the slurry pump to enable the slurry pump to pump reversely, in the reverse pumping process, slurry water stored in the flushing tank for cleaning is extracted, the slurry pump is reversely flushed through the slurry supply water pipe, after the fibers blocked by the slurry water mixture pass through the conducting pipe, the fibers blocked by the slurry water mixture enter the first pipe, in the process of passing through the first filter box, the blocked fibers in the slurry water are filtered by the filter screen in the first filter box, the filtered slurry water flows back to the flushing tank through the first pipe again to form a circulation, and the utilization rate of the slurry water is improved, the ineffective consumption of the slurry is reduced, the utilization rate of resources is improved, and the production cost is reduced; in the filtering retention process, the actual power consumption P of the motor is continuously detected by the energy consumption detection feedback module and fed back to the plc controller, when the actual power consumption P of the motor is kept to be larger than the power consumption P2 when the motor normally runs, the relative pressure difference value between the inlet end and the outlet end of the first filter box is monitored in real time and fed back to the plc controller by a first pressure difference sensor arranged on the first filter box, so that the first filter box is ensured to be in a state for filtering at the moment and is not blocked, and the influence on the normal cleaning of the pumping pump caused by the blockage of the first filter box is prevented; when the relative differential pressure value of the inlet end and the outlet end of the first filter box rises to exceed the preset upper limit differential pressure value in the plc controller, the plc controller transmits an electric signal to the three-way switching valve to switch the three-way switching valve to a second state, a conduction pipe at the inlet end of the three-way switching valve is communicated with a second pipe at the outlet end, fibers mixed and blocked by slurry and water pass through the second pipe and the second filter box, the blocked fibers are filtered by the working of the second filter box, and simultaneously, the plc controller transmits an electric signal to a first discharge on-off valve, a second discharge on-off valve, a flushing pump and a flushing three-way control valve to switch the first discharge on-off valve to an on-off state, the flushing three-way control valve controls to switch to a first state, namely, the flushing pipe at the inlet end of the flushing three-way control valve is communicated with a first flushing pipe at the outlet end, and the flushing three-way control valve pumps pump operates to pump the slurry in the flushing tank sequentially pass through the flushing pipe and the first filter box to reversely flush the The water is discharged from the first discharge pipe, and the filter screen in the first filter box is cleaned and regenerated, namely simultaneously the filter clogging fibers are filtered and regenerated, so that the working efficiency is high, the use is simple and convenient, and the working state is kept constantly; after the blocked fibers are discharged, the first differential pressure sensor monitors and feeds back the relative differential pressure value of the inlet end and the outlet end of the first filter tank to the plc controller in real time, and when the relative differential pressure of the inlet end and the outlet end of the first filter tank is equal to the differential pressure in a normal state, the plc controller transmits an electric signal to the flushing pump to close the flushing pump, so that unnecessary energy consumption and the waste of slurry are reduced; when the relative differential pressure value of the inlet end and the outlet end of the second filter box rises to exceed the preset upper limit differential pressure value in the plc controller, the plc controller transmits an electric signal to the three-way switching valve, so that the three-way switching valve is switched to a first state, a conduction pipe at the inlet end of the three-way switching valve is communicated with a first pipe at the outlet end, so that the fibers mixed and blocked by the slurry and the water pass through the first pipe and the first filter box again, the blocked fibers are filtered out at the first filter box again, and simultaneously, the plc controller transmits an electric signal to a first discharge on-off valve, a second discharge on-off valve, a flushing pump and a flushing three-way control valve, so that the first discharge on-off valve is switched to an off state, the second discharge on-off valve is switched to an on state, the flushing three-way control valve is switched to a second state, namely, a flushing pipe at the inlet end of the flushing three-way control valve is communicated with a second backwash pipe at the outlet end, and the flushing three-way control valve pumps draw the slurry in the flushing pool The mixed slurry is discharged from the second discharge pipe, a filter screen in the second filter box is cleaned and regenerated, the second filter box is subjected to back flushing regeneration when the first filter box is used for filtering, and the first filter box is subjected to back flushing regeneration when the second filter box is used for filtering, and the back flushing regeneration and the first filter box are alternately recycled to ensure the reliability of filtering and back flushing of the blocked fibers; if the relative pressure difference value of the inlet end and the outlet end of the second filter box does not exceed the preset upper limit pressure difference value in the plc controller, the plc controller judges whether the actual power consumption P of the motor is less than or equal to the power consumption P2 when the motor normally operates, if the P is kept to be greater than P2, the process returns to the step S5, the slurry pump is continuously backflushed, if the P is less than or equal to P2, the plc transmits an electric signal to the motor, the motor reversely operates for a preset time T1 and then stops, then the plc controller transmits the electric signal to the front on-off valve, the rear on-off valve and the first on-off valve respectively, the front on-off valve and the rear on-off valve are switched to the on state, the first on-off valve is switched to the off state, and then the slurry pump normally operates to pump slurry in the forward direction.
The invention is further configured to: in step S5, during the filtering and retaining process, the plc controller determines whether the actual power consumption P of the motor is less than or equal to the power consumption P2 when the motor is operating normally, and if P is less than or equal to P2, the plc controller transmits an electrical signal to the motor, the motor stops after operating in reverse for a preset time T1, and then the plc controller transmits electrical signals to the front on-off valve, the rear on-off valve, and the first on-off valve, respectively, so that the front on-off valve and the rear on-off valve are switched to the on state, and the first on-off valve is switched to the off state, and then the slurry pump operates normally to pump the slurry in the forward direction.
By adopting the technical scheme, if in the step S5, P is less than or equal to P2, namely the blocked fibers blocked inside the slurry pump are discharged, the plc transmits an electric signal to the motor, the motor operates reversely for a preset time T1 and then stops, then the plc controller transmits electric signals to the front on-off valve, the rear on-off valve and the first on-off valve respectively, so that the front on-off valve and the rear on-off valve are switched to an on state, the first on-off valve is switched to an off state, and then the slurry pump operates normally to pump the slurry in the forward direction, thereby reducing the trouble caused by the subsequent steps and improving the cleaning control efficiency of the slurry pump.
The invention is further configured to: in step S8, after the clogged fibers are cleaned, regenerated and discharged from the filter screen in the second filter box, the second differential pressure sensor monitors and feeds back the relative pressure difference between the inlet end and the outlet end of the second filter box to the plc controller in real time, when the relative pressure difference between the inlet end and the outlet end of the second filter box is equal to the normal state pressure difference, the plc controller transmits an electric signal to the washing pump to shut down, and then the process returns to step S6.
By adopting the above technical solution, if the clogged fibers are removed in step S8, the process returns to step S6 to continuously check the relative pressure difference value between the inlet end and the outlet end of the first filter tank, and if the relative pressure difference value of the first filter tank is abnormal, the first filter tank is backwashed, which is used to constantly keep the first filter tank or the second filter tank for filtering the clogged fibers in a normal state for filtering, so as to prevent the first filter tank or the second filter tank from being circulated for many times due to excessive clogged fibers and thus not being circulated for many times.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention.
FIG. 2 is a flow chart of a control method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, the invention discloses an automatic production line of coreless three-dimensional tissue paper, which comprises a pulping tank 1 and a plc controller, wherein a pulping machine is arranged at the bottom in the pulping tank 1, a pulping pipe 2 is connected to the bottom of the pulping tank 1, a pulp pumping pump 3 is arranged on the pulping pipe 2, a water adding pipe 4 for adding water to dilute pulp is arranged at the top of the pulping tank 1, a water adding pump 5 is arranged on the water adding pipe 4, a water adding flow regulating valve 6 is arranged on the water adding pipe 4, and the plc controller is respectively electrically connected with the water adding flow regulating valve 6, the water adding pump 5 and the pulp pumping pump 3.
By adopting the technical scheme, under the control of a plc controller, pulp board raw materials are fed into a pulping tank 1, then a water feeding pump 5 starts to work and feeds water into the pulping tank 1, the water feeding flow regulating valve 6 controls and feeds back the flow to the plc controller in the water feeding process, a pulper works for pulping, in the continuous pulping process, a pulp pumping pump 3 operates for pulp pumping, pulp is led out from a pulp pumping pipe 2, in the continuous leading-out process, the water quantity required to be added in real time when the pulp pumping concentration is adjusted to be 5 percent according to the pulp concentration circulating in the pulp pumping pipe 2 by the plc controller, a concentration compensation assembly connected to a water feeding pipe 4 correspondingly feeds water into the pulp pumping pipe 2 according to the water quantity calculated by the plc controller, the pulp pumping concentration is compensated and adjusted to keep the pulp concentration to fluctuate between 4 and 6 percent so as to meet the production requirement, the toilet paper production quality is improved, compared with the prior art, the concentration of the slurry is not required to be prepared by an additional device in the subsequent step, the structure is simple, and the production cost is reduced.
In the embodiment of the invention, the concentration compensation assembly comprises a concentration detection sensor 7 which is arranged on the slurry pumping pipe 2 and is positioned in front of the input end of the slurry pumping pump 3, a compensation pipe 8 of which one end is connected with the water adding pipe 4 and the connecting end is positioned between the water adding flow regulating valve 6 and the water adding pump 5, and a diluting and water adding regulating valve 9 which is arranged on the compensation pipe 8, the other end of the compensation pipe 8 is connected with the slurry pumping pipe 2, the connecting end is arranged between the concentration detection sensor 7 and the slurry pumping pump 3, and the concentration detection sensor 7 and the diluting and water adding regulating valve 9 are respectively and electrically connected with a plc controller.
By adopting the technical scheme, under the control of a plc controller, the pulp board raw material is sent into a pulping tank 1, then a water adding pump 5 starts to work and sends water into the pulping tank 1, the water adding flow regulating valve 6 controls and feeds back the flow to the plc controller in the water sending process, a pulper works for pulping, the pulp pump 3 operates for pulping in the continuous pulping process, the pulp is led out from a pulping pipe 2, in the continuous leading-out process, a concentration detection sensor 7 detects the concentration of the pulp in the pulping pipe 2 and feeds back the concentration to the plc controller, the plc controller calculates the amount of water needed to be added for regulating the pulp concentration to be 5 percent based on the real-time pulp concentration circulating in the pulping pipe 2, an electric signal is sent to a diluting and water adding regulating valve 9 arranged on a compensating pipe 8, the diluting and water adding regulating valve 9 controls the water feeding amount flowing from the compensating pipe 8 to the pulping pipe 2 for diluting the pulp concentration according to the signal, the effect of compensating and controlling the fluctuation of the slurry concentration between 4 percent and 6 percent is achieved, so that the average slurry concentration of the slurry is about 5 percent, the production requirement is met, and the production quality of the toilet paper is improved.
In a specific embodiment of the present invention, the slurry pump 3 includes a motor controlled by a plc controller and used for driving the pump to pump in a forward direction or a reverse direction, the motor is provided with an energy consumption monitoring feedback module electrically connected with the plc controller and used for detecting actual energy consumption of the pump and feeding the detected energy consumption back to the plc controller, the slurry pumping pipe 2 is connected with a filter pipeline assembly used for filtering fibers blocked at the input end of the slurry pump 3, the plc controller compares the energy consumption monitoring feedback module with an energy consumption preset value of the motor on the plc controller during normal operation, when the energy consumption exceeds a motor normal operation upper limit power consumption value preset inside the plc controller, an electric signal is transmitted to the slurry pump 3, the slurry pump stops and then performs reverse pumping to clean, and the fibers blocked at the input end of the slurry pump 3 are filtered in the filter pipeline assembly.
By adopting the technical scheme, in the continuous pulping process, the pulp pumping pump 3 operates to pump pulp, the pulp pumping pump 3 operates normally to pump pulp in a forward direction, the current consumption of the motor is in a normal state, the energy consumption monitoring feedback module detects and feeds back the power consumption of the motor to the plc controller in a normal state, when more long fibers are partially or completely blocked in the pulp pumping pump 3, the load level of the motor is increased to cause the actual current consumption of the motor to be increased, the energy consumption monitoring feedback module detects the actual power consumption of the motor to be increased and feeds back the power consumption to the plc controller, when the actual power consumption exceeds the upper limit power consumption value of the motor preset in the plc controller during normal operation, the plc controller transmits an electric signal to the pulp pumping pump 3, the pulp pumping pump 3 stops operation and then pumps in a reverse direction, so that the fibers blocked or partially blocked at the input end of the pulp pumping pump 3 are fed into the filtering pipeline assembly to be filtered under the reverse rotation state of the motor, the energy consumption detection feedback module detects that the actual power consumption of the motor is recovered to the power consumption value in normal operation and feeds the power consumption value back to the plc controller, the plc controller drives the motor to reversely operate for a preset time and then stops, and then the normal operation and the forward pumping of the slurry are carried out.
In the embodiment of the present invention, the filtering pipeline assembly includes a front on-off valve 11 disposed in front of the input end of the slurry pump 3, a rear on-off valve 12 disposed behind the output end of the slurry pump 3, a flushing tank 13, a conducting pipe 14 having one end connected to the slurry pipe 2 between the front on-off valve 11 and the slurry pump 3, and a three-way switching valve 15 having an inlet end communicated with the other end of the conducting pipe 14, two outlet ends of the three-way switching valve 15 are respectively connected to the flushing tank 13 through a first pipe 16 and a second pipe 17, a valve core of the three-way switching valve 15 has two switching states, the conducting pipe 14 at the inlet end is communicated with the first pipe 16 at the outlet end in the first state, the conducting pipe 14 at the inlet end is communicated with the second pipe 17 at the outlet end in the second state, the first pipe 16 and the second pipe 17 are respectively provided with a first filter box 18 and a second filter box 19 for filtering out the blocked fibers, the washing tank 13 is connected with the slurry pumping pipe 2 through a slurry supply pipe 20, a connecting end of the washing tank is arranged between the rear on-off valve 12 and the slurry pumping pump 3, a one-way valve 21 for conducting slurry in the washing tank 13 to the slurry pumping pipe 2 in a one-way mode is arranged on the slurry supply pipe 20, a first on-off valve 22 is arranged on the conducting pipe 14, the plc controller is respectively and electrically connected with the front on-off valve 11, the rear on-off valve 12 and the three-way switching valve 15, the first filter box 18 and the second filter box 19 are respectively and electrically connected with the plc controller, a first differential pressure sensor 23 and a second differential pressure sensor 24 which are used for detecting the relative differential pressure of the inlet end and the outlet end of the first filter box 18 and the second filter box 19 in real time and transmitting the relative differential pressure to the plc controller are arranged on the first filter box 23 or the second differential pressure sensor 24, and when the relative differential pressure of the inlet end and the outlet end of the first differential pressure sensor, the three-way switching valve 15 is switched to another state to control the back flushing of the pulp water through the first filter tank 18 or the second filter tank 19 to discharge the back flushing control assembly clogging the fibers.
By adopting the technical scheme, in the continuous pulping process, the pulp pumping pump 3 operates to pump pulp, when more long fibers are partially or completely blocked in the pulp pumping pump 3 during the normal operation of the pulp pumping pump 3 in the forward pulp pumping process, the energy consumption detection feedback module detects that the actual power consumption of the motor is increased and feeds the actual power consumption back to the plc controller, when the actual power consumption exceeds the upper limit power consumption value of the motor preset in the plc controller during the normal operation, the plc controller transmits an electric signal to the pulp pumping pump 3 to stop the pulp pumping pump 3, then the electric signals are respectively transmitted to the front on-off valve 11, the rear on-off valve 12 and the first on-off valve 22 to switch the front on-off valve 11 and the rear on-off valve 12 to the off state, the first on-off valve 22 is in the on state, the electric signal is transmitted to the pulp pumping pump 3 to enable the pulp pumping pump 3 to perform reverse pumping, and during the reverse pumping process, pulp water stored in the flushing tank 13 for cleaning is pumped, the slurry water is reversely flushed through the slurry supply pipe 20 to the slurry pump 3, the slurry water mixed with the blocked fibers passes through the conduction pipe 14, the three-way switching valve 15 is in a first state, the conduction pipe 14 at the inlet end is communicated with the first pipe 16 at the outlet end, the slurry water mixed with the blocked fibers enters the first pipe 16, the blocked fibers in the slurry water are filtered and retained by the filter screen in the first filter box 18 in the process of passing through the first filter box 18, the filtered slurry water flows back to the flushing tank 13 through the first pipe 16 again to form a circulation, in the filtering and retaining process, the relative pressure difference value between the inlet end and the outlet end of the first filter box 18 is monitored in real time and fed back to the plc controller by the first pressure difference sensor 23 arranged on the first filter box 18, when the filter screen is blocked by the blocked fibers in the first filter box 18, the relative pressure difference value between the inlet end and the outlet end rises to cause most of the filter screen to be blocked, when the relative pressure difference value between the inlet end and the outlet end exceeds a preset value on a plc controller, at the moment, the plc controller transmits an electric signal to the three-way switching valve 15, the three-way switching valve 15 is switched to a second state, a conduction pipe 14 at the inlet end of the three-way switching valve 15 is communicated with a second pipe 17 at the outlet end, the fibers mixed and blocked by the slurry and the water pass through the second pipe 17 and a second filter box 19, the blocked fibers are filtered at the second filter box 19, and simultaneously, the plc controller controls a reverse flushing control assembly to run back the slurry and pass through the first filter box 18 to discharge the blocked fibers, a filter screen in the first filter box 18 is cleaned and regenerated, so that the filtering of the blocked fibers and the regeneration of the first filter box 18 or the second filter box 19 are simultaneously carried out, the first filter box 18 and the second filter box 19 are switched to ensure the rapid treatment and discharge of the blocked fibers at the pulp pump 3, and the treatment efficiency and the automatic treatment effect on the pulp pump 3 are greatly improved, the energy consumption detection feedback module detects that the actual power consumption of the motor is recovered to the power consumption value in normal operation and feeds the power consumption value back to the plc controller, the plc controller drives the motor to reversely operate for a preset time and then stops, then the plc controller transmits electric signals to the front on-off valve 11, the rear on-off valve 12 and the first on-off valve 22 respectively, so that the front on-off valve 11 and the rear on-off valve 12 are switched to be in an on state, the first on-off valve 22 is switched to be in an off state, then the slurry pump 3 normally operates to pump slurry in a forward direction, and in the pumping process, the slurry can be sent to the next production step only through the rear on-off valve 12 in the on state due to the existence of the one-way valve 21 after passing through the slurry pump 3.
In the embodiment of the present invention, the back flushing control assembly includes a flushing pipe 31 with one end connected to the flushing tank 13, a flushing pump 32 disposed on the flushing pipe 31, and a flushing three-way control valve 33 with an inlet end communicated with the other end of the flushing pipe 31, two outlet ends of the flushing three-way control valve 33 are respectively connected to a first back flushing pipe 34 and a second back flushing pipe 35, a spool of the flushing three-way control valve 33 has two switching states, in the first state, the flushing pipe 31 at the inlet end is communicated with the first back flushing pipe 34 at the outlet end, in the second state, the flushing pipe 31 at the inlet end is communicated with the second back flushing pipe 35 at the outlet end, one end of the first back flushing pipe 34 far from the flushing three-way control valve 33 is connected to the first pipe 16 and a connection end is disposed between the first filter tank 18 and the flushing tank 13, one end of the second back flushing pipe 35 far from the flushing three-way control valve 33 is connected to the second pipe 17 and a connection end is disposed between the second filter tank 19 and, on the first pipe 16 and be located and be connected with first discharge pipe 36 between three-way switching valve 15 and the first straining box 18, be provided with first discharge on-off valve 37 on the first discharge pipe 36, on the second pipe 17 and be located and be connected with second discharge pipe 38 between three-way switching valve 15 and the second straining box 19, be provided with second discharge on-off valve 39 on the second discharge pipe 38, the plc controller is connected with flush pump 32, wash three-way control valve 33, first discharge on-off valve 37 and second discharge on-off valve 39 electricity respectively.
By adopting the technical scheme, in the continuous pulping process, the pulp pumping pump 3 operates to pump pulp, when more long fibers are partially or completely blocked in the pulp pumping pump 3 during the normal operation of the pulp pumping pump 3 in the forward pulp pumping process, the energy consumption detection feedback module detects that the actual power consumption of the motor is increased and feeds the actual power consumption back to the plc controller, when the actual power consumption exceeds the upper limit power consumption value of the motor preset in the plc controller during the normal operation, the plc controller transmits an electric signal to the pulp pumping pump 3 to stop the pulp pumping pump 3, then the electric signals are respectively transmitted to the front on-off valve 11, the rear on-off valve 12 and the first on-off valve 22 to switch the front on-off valve 11 and the rear on-off valve 12 to the off state, the first on-off valve 22 is in the on state, the electric signal is transmitted to the pulp pumping pump 3 to enable the pulp pumping pump 3 to perform reverse pumping, and during the reverse pumping process, pulp water stored in the flushing tank 13 for cleaning is pumped, the slurry water is reversely flushed through the slurry supply pipe 20 to the slurry pump 3, the slurry water mixed with the blocked fibers passes through the conduction pipe 14, the three-way switching valve 15 is in a first state, the conduction pipe 14 at the inlet end is communicated with the first pipe 16 at the outlet end, the slurry water mixed with the blocked fibers enters the first pipe 16, the blocked fibers in the slurry water are filtered and retained by the filter screen in the first filter box 18 in the process of passing through the first filter box 18, the filtered slurry water flows back to the flushing tank 13 through the first pipe 16 again to form a circulation, in the filtering and retaining process, the relative pressure difference value between the inlet end and the outlet end of the first filter box 18 is monitored in real time and fed back to the plc controller by the first pressure difference sensor 23 arranged on the first filter box 18, when the filter screen is blocked by the blocked fibers in the first filter box 18, the relative pressure difference value between the inlet end and the outlet end rises to cause most of the filter screen to be blocked, when the relative pressure difference between the inlet and outlet ends rises to exceed the predetermined value on the plc controller, the plc controller transmits an electric signal to the three-way switching valve 15 to switch the three-way switching valve 15 to the second state, the conducting pipe 14 at the inlet end of the three-way switching valve 15 communicates with the second pipe 17 at the outlet end to allow the pulp-water mixed and clogged fibers to pass through the second pipe 17 and the second filter tank 19 to filter the clogged fibers at the second filter tank 19, and at the same time, the plc controller transmits an electric signal to the first discharge on-off valve 37, the second discharge on-off valve 39, the flush pump 32 and the flush three-way control valve 33 to switch the first discharge on-off valve 37 to the passage state, the second discharge on-off valve 39 to the disconnection state, and the flush three-way control valve 33 controls to switch to the first state, that is, the flush pipe 31 at the inlet end communicates with the first return pipe 34 at the outlet end, and under the operation of the flush, the pulp water in the pumping flushing tank 13 passes through the flushing pipe 31 and the first back flushing pipe 34 in sequence and reversely flushes the first filter box 18 to discharge the blocked fiber mixed pulp water from the first discharge pipe 36, the filter screen in the first filter box 18 is cleaned and regenerated, after the blocked fiber is discharged, the first differential pressure sensor 23 monitors and feeds back the relative pressure difference value between the inlet end and the outlet end of the first filter box 18 to the plc controller in real time, at the moment, the differential pressure is recovered to the normal state, the plc controller transmits an electric signal to the flushing pump 32 to be closed so as to reduce the waste of the pulp water, simultaneously, the blocked fiber is filtered and the first filter box 18 or the second filter box 19 is regenerated, the first filter box 18 and the second filter box 19 are switched to be used so as to ensure the rapid treatment and discharge of the blocked fiber at the pulp pump 3, the treatment efficiency and the automatic treatment effect of the pulp pump 3 blockage are greatly improved, the power consumption detection feedback module detects the power consumption value of the motor when the motor is recovered to the normal operation and feeds back to the plc controller, the plc controller drives the motor to reversely operate for a preset time and then stops, then the plc controller transmits electric signals to the front on-off valve 11, the rear on-off valve 12 and the first on-off valve 22 respectively, so that the front on-off valve 11 and the rear on-off valve 12 are switched to an on state, the first on-off valve 22 is switched to an off state, and then the slurry pump 3 normally operates to pump slurry in a forward direction.
Example 2
As shown in fig. 2, the present invention also discloses a control production method suitable for the automatic production line of the coreless three-dimensional toilet paper, which comprises the following steps:
s1, slurry pumping operation: feeding the pulp board raw material into a pulping tank 1, under the control of a plc controller, starting the operation of a water adding pump 5, feeding water into the pulping tank 1, controlling the water adding flow regulating valve 6 in the water feeding process, feeding back the flow to the plc controller, pulping the pulp by a pulping machine, and pumping the pulp by a pulp pumping pump 3 in the continuous pulping process;
s2, slurry pumping concentration control: the slurry is led out from the slurry pumping pipe 2, in the process of continuous leading-out, the concentration of the slurry in the slurry pumping pipe 2 is detected by a concentration detection sensor 7 and fed back to a plc controller, the plc controller calculates the water amount required to be added when the slurry concentration is adjusted to be 5% based on the real-time slurry concentration flowing inside the slurry pumping pipe 2, an electric signal is sent to a dilution water adding adjusting valve 9, and the dilution water adding adjusting valve 9 controls the water inflow amount flowing from a compensating pipe 8 to the slurry pumping pipe 2 to dilute the slurry concentration according to the signal to compensate and control the slurry concentration to be 4% -6%;
s3, blockage detection: when more long fibers are partially or completely blocked in the slurry pump 3, the energy consumption detection feedback module detects that the actual power consumption P of the motor is increased and feeds the actual power consumption P back to the plc controller, and when the actual power consumption P exceeds an upper limit power consumption value P1 when the motor preset in the plc controller normally runs, the plc controller transmits an electric signal to the slurry pump 3 to stop the slurry pump 3 from running;
s4, back flushing: the plc controller sends electrical signals to the front on-off valve 11, the rear on-off valve 12 and the first on-off valve 22, respectively, to switch the front on-off valve 11 and the rear on-off valve 12 to the off state, and the first on-off valve 22 is in the on state, and then the plc controller transmits an electric signal to the slurry pump 3, so that the slurry pump 3 pumps reversely again, and during the reverse pumping, the slurry stored in the washing tank 13 for washing is pumped to make the slurry flow through the slurry supply pipe 20 to back wash the slurry pump 3, the slurry is mixed with the blocked fiber and passes through the conduction pipe 14, at this time, the three-way switching valve 15 is in the first state, the conducting pipe 14 at the inlet end is communicated with the first pipe 16 at the outlet end, the pulp and water are mixed and blocked fibers enter the first pipe 16, during the process of passing through the first filter box 18, the blocking fibers in the slurry are filtered and retained by the filter screen in the first filter box 18, and the filtered slurry flows back to the washing tank 13 through the first pipe 16 again to form a circulation;
s5, state judgment: in the filtering retention process, the energy consumption detection feedback module continuously detects the actual power consumption P of the motor and feeds the actual power consumption P back to the plc controller, and when the actual power consumption P of the motor is kept to be larger than the power consumption P2 when the motor normally runs, the relative pressure difference value between the inlet end and the outlet end of the first filter box 18 is monitored in real time and fed back to the plc controller by the first pressure difference sensor 23 arranged on the first filter box 18;
s6, backflushing regeneration: when the relative pressure difference between the inlet and outlet ends of the first filter tank 18 exceeds the predetermined upper limit pressure difference in the plc controller, the plc controller transmits an electric signal to the three-way switching valve 15 to switch the three-way switching valve 15 to the second state, the conduction pipe 14 at the inlet end of the three-way switching valve 15 communicates with the second pipe 17 at the outlet end, the slurry mixed and clogged fibers pass through the second pipe 17 and the second filter tank 19, the clogged fibers are filtered out at the second filter tank 19, and at the same time, the plc controller transmits an electric signal to the first discharge on-off valve 37, the second discharge on-off valve 39, the flushing pump 32 and the flushing three-way control valve 33 to switch the first discharge on-off valve 37 to the on-off state, the second discharge on-off valve 39 is switched to the off state, the flushing three-way control valve 33 controls to switch to the first state, that is, the flushing pipe 31 at the inlet end communicates with the first return pipe 34 at the outlet end, and under the working operation of the flushing pump 32, the pulp water pumped from the flushing tank 13 passes through the flushing pipe 31 and the first back flushing pipe 34 in sequence and reversely flushes the first filter box 18 so as to discharge the blocked fiber mixed pulp water from the first discharge pipe 36, and the filter screen in the first filter box 18 is cleaned and regenerated;
s7, stopping for preparation: after the blocked fibers are discharged, the first differential pressure sensor 23 monitors and feeds back the relative pressure difference value of the inlet end and the outlet end of the first filter tank 18 to the plc controller in real time, and when the relative pressure difference of the inlet end and the outlet end of the first filter tank is equal to the pressure difference in a normal state, the plc controller transmits an electric signal to the flushing pump 32 to close;
s8, cyclic regeneration: when the relative pressure difference between the inlet and outlet ends of the second filter tank 19 rises above the predetermined upper pressure difference in the plc controller, an electrical signal is transmitted from the plc controller to the three-way switching valve 15, the three-way switching valve 15 is switched to the first state, the conduit 14 at the inlet end of the three-way switching valve 15 is communicated with the first pipe 16 at the outlet end, the slurry mixed and clogged fibers are caused to pass through the first pipe 16 and the first filter tank 18 again, the clogged fibers are filtered out at the first filter tank 18, and at the same time, the plc controller transmits an electrical signal to the first discharge on-off valve 37, the second discharge on-off valve 39, the flush pump 32 and the flush three-way control valve 33, the first discharge on-off valve 37 is switched to the shut-off state, the second discharge on-off valve 39 is switched to the on-state, the flush three-way control valve 33 is controlled to be switched to the second state, that is, the flush pipe 31 at the inlet end is communicated with the second flush pipe, under the working operation of the flushing pump 32, the flushing pump pumps the pulp water in the flushing tank 13 to sequentially pass through the flushing pipe 31 and the second backwashing pipe 35 and reversely flush the second filter tank 19 so as to discharge the blocked fiber mixed pulp water from the second discharge pipe 38, and the filter screen in the second filter tank 19 is cleaned and regenerated;
s9, recovering normal slurry pumping: if the relative pressure difference value between the inlet end and the outlet end of the second filter box 19 does not exceed the predetermined upper limit pressure difference value in the plc controller, the plc controller determines whether the actual power consumption P of the motor is less than or equal to the power consumption P2 during normal operation of the motor, and if P remains greater than P2, the process returns to step S5; if P is less than or equal to P2, the plc transmits an electric signal to the motor, the motor stops after running for a preset time T1 in the reverse direction, then the plc controller transmits electric signals to the front on-off valve 11, the rear on-off valve 12 and the first on-off valve 22 respectively, so that the front on-off valve 11 and the rear on-off valve 12 are switched to the on state, the first on-off valve 22 is switched to the off state, and then the slurry pump 3 normally runs to pump slurry in the forward direction.
By adopting the technical scheme, the concentration detection sensor 7 is adopted to detect the concentration of the slurry in the slurry pumping pipe 2 and feed the detected concentration back to the plc controller, the plc controller calculates the water quantity required to be added for adjusting the slurry pumping concentration to be 5% based on the real-time slurry concentration circulating in the slurry pumping pipe 2, an electric signal is sent to the diluting and water adding adjusting valve 9 arranged on the compensating pipe 8, the diluting and water adding adjusting valve 9 controls the water inflow quantity flowing from the compensating pipe 8 to the slurry pumping pipe 2 for diluting the slurry concentration according to the signal, the effect of compensating and controlling the slurry concentration to fluctuate between 4% and 6% is achieved, the slurry pumping concentration is about 5% on average, the production requirement is met, and the production quality of toilet paper is improved; when more long fibers are partially or completely blocked in the slurry pump 3, the energy consumption detection feedback module detects that the actual power consumption P of the motor rises and feeds the actual power consumption P back to the plc controller, and when the actual power consumption P exceeds an upper limit power consumption value P1 when the motor preset in the plc controller normally runs, the plc controller transmits an electric signal to the slurry pump 3 to stop the operation of the slurry pump 3, so that the invalid power consumption of the slurry pump 3 is reduced, and the internal damage of the slurry pump 3 caused by continuous overload operation is avoided; after stopping the operation of the slurry pump 3, the plc controller sends electrical signals to the front on-off valve 11, the rear on-off valve 12 and the first on-off valve 22 respectively, so that the front on-off valve 11 and the rear on-off valve 12 are switched to the off state, the first on-off valve 22 is in the on state, after the pipeline configuration is adjusted, the plugged fibers are discharged, the plc controller transmits the electrical signals to the slurry pump 3, so that the slurry pump 3 pumps the fibers in reverse direction, during the reverse pumping process, slurry water stored in the washing tank 13 for cleaning is pumped, so that the slurry water reversely flushes the slurry pump 3 through the slurry supply pipe 20, after the fibers mixed with the plugged fibers pass through the conducting pipe 14, the fibers mixed with the slurry water and plugged into the first pipe 16, and during the process of passing through the first filtering tank 18, the plugged fibers in the slurry water are filtered by the filter screen in the first filtering tank 18, and the filtered slurry water flows back to the washing tank 13 through the first pipe 16 again to form a circulation, the utilization rate of the slurry is improved, the ineffective consumption of the slurry is reduced, the utilization rate of resources is improved, and the production cost is reduced; in the filtering retention process, the energy consumption detection feedback module continuously detects the actual power consumption P of the motor and feeds the actual power consumption P back to the plc controller, and when the actual power consumption P of the motor is kept to be larger than the power consumption P2 when the motor normally runs, the first pressure difference sensor 23 arranged on the first filter box 18 monitors and feeds back the relative pressure difference value between the inlet end and the outlet end of the first filter box 18 to the plc controller in real time so as to ensure that the first filter box 18 for filtering is in a state for filtering at the moment and is not blocked, so that the influence on the normal cleaning of the slurry pump 3 due to the blockage of the first filter box 18 is prevented; when the relative pressure difference value between the inlet end and the outlet end of the first filter box 18 rises to exceed the predetermined upper limit pressure difference value in the plc controller, the plc controller transmits an electric signal to the three-way switching valve 15, so that the three-way switching valve 15 is switched to the second state, the conduction pipe 14 at the inlet end of the three-way switching valve 15 is communicated with the second pipe 17 at the outlet end, so that the fiber mixed and blocked by the slurry passes through the second pipe 17 and the second filter box 19, the blocked fiber is filtered by the operation of the second filter box 19, and at the same time, the plc controller transmits an electric signal to the first discharge on-off valve 37, the second discharge on-off valve 39, the flushing pump 32 and the flushing three-way control valve 33, so that the first discharge on-off valve 37 is switched to the on-way state, the second discharge on-off valve 39 is switched to the off state, and the flushing three-way control valve 33 is controlled to be switched to the first state, that the flushing pipe 31 at the inlet end is communicated, the pulp water pumped from the flushing tank 13 passes through the flushing pipe 31 and the first back flushing pipe 34 in sequence and reversely flushes the first filter box 18 so as to discharge the fiber blocking mixed pulp water from the first discharge pipe 36, and the filter screen in the first filter box 18 is cleaned and regenerated, namely the filter blocking fibers are filtered and the first filter box 19 is regenerated, so that the working efficiency is high, the use is simple and convenient, and the working state is kept constantly; after the blocked fibers are discharged, the first differential pressure sensor 23 monitors and feeds back the relative pressure difference value of the inlet end and the outlet end of the first filter tank 18 to the plc controller in real time, and when the relative pressure difference of the inlet end and the outlet end of the first filter tank is equal to the pressure difference in a normal state, the plc controller transmits an electric signal to the flushing pump 32 to close, so that unnecessary energy consumption and waste of slurry are reduced; when the relative pressure difference between the inlet and outlet ends of the second filter tank 19 rises above the predetermined upper pressure difference in the plc controller, an electrical signal is transmitted from the plc controller to the three-way switching valve 15, the three-way switching valve 15 is switched to the first state, the conduit 14 at the inlet end of the three-way switching valve 15 is communicated with the first pipe 16 at the outlet end, the slurry mixed and clogged fibers are caused to pass through the first pipe 16 and the first filter tank 18 again, the clogged fibers are filtered out at the first filter tank 18, and at the same time, the plc controller transmits an electrical signal to the first discharge on-off valve 37, the second discharge on-off valve 39, the flush pump 32 and the flush three-way control valve 33, the first discharge on-off valve 37 is switched to the shut-off state, the second discharge on-off valve 39 is switched to the on-state, the flush three-way control valve 33 is controlled to be switched to the second state, that is, the flush pipe 31 at the inlet end is communicated with the second flush pipe, when the flushing pump 32 operates, the pulp water pumped from the flushing tank 13 passes through the flushing pipe 31 and the second backwashing pipe 35 in sequence and reversely flushes the second filter tank 19 to discharge the blocked fiber mixed pulp water from the second discharge pipe 38, the filter screen in the second filter tank 19 is cleaned and regenerated, the second filter tank 19 is backflushed and regenerated when the first filter tank 18 filters, the first filter tank 18 is backflushed and regenerated when the second filter tank 19 filters, and the two are alternately recycled to ensure the reliability of filtering and backflushing the blocked fiber; if the relative pressure difference value between the inlet end and the outlet end of the second filter box 19 does not exceed the preset upper limit pressure difference value in the plc controller, the plc controller determines whether the actual power consumption P of the motor is less than or equal to the power consumption P2 when the motor normally operates, if P is kept greater than P2, the process returns to step S5, the slurry pump 3 continues to perform back flush, if P is less than or equal to P2, the plc transmits an electric signal to the motor, the motor stops after reversely operating for a preset time T1, then the plc controller transmits electric signals to the front on-off valve 11, the rear on-off valve 12 and the first on-off valve 22 respectively, so that the front on-off valve 11 and the rear on-off valve 12 are switched to the on-off state, and the first on-off valve 22 is switched to the off state, and then the slurry pump 3 normally operates to pump slurry in the forward direction.
In step S5, in the filtering and retaining process, the plc controller determines whether the actual power consumption P of the motor is less than or equal to the power consumption P2 when the motor normally operates, if P is less than or equal to P2, the plc controller transmits an electrical signal to the motor, the motor stops after the motor reversely operates for a preset time T1, and then the plc controller transmits electrical signals to the front on-off valve 11, the rear on-off valve 12, and the first on-off valve 22, respectively, so that the front on-off valve 11 and the rear on-off valve 12 are switched to the on state, the first on-off valve 22 is switched to the off state, and then the pump 3 normally operates to pump the slurry in the forward direction.
By adopting the above technical scheme, if in step S5, P is less than or equal to P2, that is, the blocked fibers blocked inside the slurry pump 3 are discharged, the plc transmits an electrical signal to the motor, the motor operates in reverse for a preset time T1 and then stops, then the plc controller transmits electrical signals to the front on-off valve 11, the rear on-off valve 12 and the first on-off valve 22 respectively, so that the front on-off valve 11 and the rear on-off valve 12 are switched to an on state, and the first on-off valve 22 is switched to an off state, then the slurry pump 3 operates normally and pumps slurry forward, thereby reducing the trouble caused by the subsequent steps and improving the cleaning control efficiency of the slurry pump 3.
In the present embodiment, after the clogged fibers are discharged from the second filter box 19 after the filter screen cleaning and regeneration, the second differential pressure sensor 24 monitors and feeds back the inlet and outlet relative pressure difference values of the second filter box 19 to the plc controller in real time in step S8, and when the inlet and outlet relative pressure difference values of the second filter box 19 are equal to the normal state pressure difference, the plc controller transmits an electrical signal to the washing pump 32 to turn off, and then returns to step S6.
By adopting the above technical solution, if the clogged fibers are removed in step S8, the process returns to step S6 to continuously check the relative pressure difference value between the inlet end and the outlet end of the first filter tank 18, and if the relative pressure difference value of the first filter tank 18 is abnormal, the first filter tank 18 is back-flushed, which is used to constantly keep the first filter tank 18 or the second filter tank 19 for filtering the clogged fibers in a normal state for filtering, so as to prevent the first filter tank 18 or the second filter tank 19 from being circulated many times due to the excessively clogged fibers and thus prevent the circulation from being stopped many times.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (5)

1. The utility model provides an automation line of three-dimensional beautiful toilet paper of centreless, includes garrulous thick liquid pond (1) and plc controller, the bottom is provided with the pulper in garrulous thick liquid pond (1), garrulous thick liquid pond (1) bottom is connected with pulp pumping pipe (2), be provided with pulp pumping pump (3) on pulp pumping pipe (2), garrulous thick liquid pond (1) top is provided with filler pipe (4) that are used for adding water and dilute the thick liquid, be provided with filler pump (5) on filler pipe (4), be provided with on filler pipe (4) and add water flow control valve (6), the plc controller respectively with add water flow control valve (6), filler pump (5) and pulp pumping pump (3) electricity connection, its characterized in that: the utility model discloses a slurry pump, including the regulation of being connected with on filler pipe (4) and being arranged in compensating water to slurry pumping pipe (2) and being connected with the plc controller adjustment slurry concentration's concentration compensation subassembly, concentration compensation subassembly is including installing concentration detection sensor (7) on slurry pumping pipe (2) and being located slurry pumping pump (3) input front, one end is connected with filler pipe (4) and the link is located compensating pipe (8) between water flow control valve (6) and water pump (5) and dilution water regulating valve (9) of setting on compensating pipe (8), compensating pipe (8) other end is connected with slurry pumping pipe (2) and the link sets up between concentration detection sensor (7) and slurry pumping pump (3), concentration detection sensor (7) and dilution water regulating valve (9) are connected with the plc controller electricity respectively, slurry pumping pump (3) include by the plc controller control be used for driving its forward or reverse pump motor, be provided with on the motor and be used for detecting its actual energy consumption and feed back to the energy consumption monitoring feedback module of plc controller with plc controller electricity is connected, be connected with on slurry pumping pipe (2) and be used for filtering slurry pump (3) input to block up fibrous filtration pipeline subassembly, plc controller compares based on energy consumption monitoring feedback module and the motor during normal operating energy consumption default on the plc controller, transmits the signal of telecommunication to slurry pump (3) when exceeding the inside predetermined motor normal operating upper limit consumption value of plc controller, makes it stop the back again reverse pump sending wash and make the jam fibre of slurry pump (3) input to filter in the pipeline subassembly, filtration pipeline subassembly is including setting up preceding on-off valve (11) before slurry pump (3) input and setting up back on-off valve (12), flushing tank (13) after slurry pump (3) output, A conducting pipe (14) with one end connected on the slurry pumping pipe (2) between the front on-off valve (11) and the slurry pumping pump (3) and a three-way switching valve (15) with the inlet end communicated with the other end of the conducting pipe (14), two outlet ends of the three-way switching valve (15) are respectively connected with a flushing tank (13) through a first pipe (16) and a second pipe (17), a valve core of the three-way switching valve (15) has two switching states, the conducting pipe (14) at the inlet end is communicated with the first pipe (16) at the outlet end in a first state, the conducting pipe (14) at the inlet end is communicated with the second pipe (17) at the outlet end in a second state, a first filter box (18) and a second filter box (19) for filtering out blocking fibers are respectively arranged on the first pipe (16) and the second pipe (17), the flushing tank (13) is connected with the slurry pumping pipe (2) through a slurry supply water pipe (20), and the connecting end is arranged between the rear on-off valve (12) and the slurry pumping pump (3), the slurry supply pipe (20) is provided with a one-way valve (21) for conducting slurry in the flushing tank (13) to the slurry pumping pipe (2) in a one-way mode, the conducting pipe (14) is provided with a first on-off valve (22), the plc controller is electrically connected with the front on-off valve (11), the rear on-off valve (12) and the three-way switching valve (15) respectively, the first filter box (18) and the second filter box (19) are provided with a first pressure difference sensor (23) and a second pressure difference sensor (24) which are electrically connected with the plc controller and used for detecting the relative pressure difference between the inlet end and the outlet end of the first filter box (18) and the second filter box (19) in real time and transmitting the relative pressure difference to the plc controller, the flushing tank (13) is connected with a three-way switching valve (15) which is switched to another state when the relative pressure difference value between the inlet end and the outlet end of the first pressure difference sensor (23) or the second pressure difference sensor (24) exceeds a preset value on the plc controller, a back flush control assembly that controls the back flushing of the slurry through the first filter box (18) or the second filter box (19) to drain the clogged fibers.
2. The automatic production line of coreless three-dimensional toilet paper according to claim 1, wherein: the reverse flushing control assembly comprises a flushing pipe (31) with one end connected with a flushing pool (13), a flushing pump (32) arranged on the flushing pipe (31) and a flushing three-way control valve (33) with an inlet end communicated with the other end of the flushing pipe (31), two outlet ends of the flushing three-way control valve (33) are respectively connected with a first back flushing pipe (34) and a second back flushing pipe (35), a valve core of the flushing three-way control valve (33) has two switching states, the flushing pipe (31) at the inlet end is communicated with the first back flushing pipe (34) at the outlet end in the first state, the flushing pipe (31) at the inlet end is communicated with the second back flushing pipe (35) at the outlet end in the second state, one end of the first back flushing pipe (34) far away from the flushing three-way control valve (33) is connected with the first pipe (16), and a connecting end is arranged between the first filter box (18) and the flushing pool (13), one end and the second pipe (17) that wash tee bend control valve (33) was kept away from in second recoil pipe (35) are connected and the link sets up between second filter tank (19) and washing pond (13), be connected with first discharge pipe (36) on first pipe (16) and between being located tee bend diverter valve (15) and first filter tank (18), be provided with first discharge on-off valve (37) on first discharge pipe (36), just be located tee bend diverter valve (15) and second filter tank (19) on second pipe (17) and be connected with second discharge pipe (38), be provided with second discharge on-off valve (39) on second discharge pipe (38), the plc controller is connected with flush pump (32), wash tee bend control valve (33), first discharge on-off valve (37) and second discharge on-off valve (39) electricity respectively.
3. A control method for an automatic production line of coreless three-dimensional toilet paper according to claim 2, comprising the steps of:
s1, slurry pumping operation: feeding the pulp board raw material into a pulping tank (1), under the control of a plc controller, starting the operation of a water adding pump (5), feeding water into the pulping tank (1), controlling the water adding flow regulating valve (6) in the water feeding process, feeding back the flow to the plc controller, enabling a pulper to operate for pulping, and operating a pulp pumping pump (3) for pulp pumping in the continuous pulping process;
s2, slurry pumping concentration control: the slurry is led out from the slurry pumping pipe (2), in the continuous leading-out process, the concentration of the slurry in the slurry pumping pipe (2) is detected by a concentration detection sensor (7) and fed back to a plc controller, the plc controller calculates the water amount required to be added when the slurry concentration is adjusted to be 5% based on the real-time slurry concentration circulating in the slurry pumping pipe (2), an electric signal is sent to a dilution water adding regulating valve (9), and the dilution water adding regulating valve (9) controls the water inflow amount flowing from a compensating pipe (8) to the slurry pumping pipe (2) to dilute the slurry concentration according to the signal so as to compensate and control the slurry concentration to be between 4% and 6%;
s3, blockage detection: when more long fibers are partially or completely blocked in the slurry pump (3), the energy consumption detection feedback module detects that the actual power consumption P of the motor rises and feeds the actual power consumption P back to the plc controller, and when the actual power consumption P exceeds an upper limit power consumption value P1 when the motor preset in the plc controller normally runs, the plc controller transmits an electric signal to the slurry pump (3) to stop the operation of the slurry pump (3);
s4, back flushing: the plc controller respectively sends an electric signal to the front on-off valve (11), the rear on-off valve (12) and the first on-off valve (22), so that the front on-off valve (11) and the rear on-off valve (12) are switched to an off state, the first on-off valve (22) is in an on state, then the plc controller transmits the electric signal to the slurry pump (3), so that the slurry pump (3) pumps reversely, during the reverse pumping process, slurry water for cleaning stored in the washing tank (13) is extracted, the slurry pump (3) is reversely flushed by the slurry water supply pipe (20), after the fibers blocked by slurry water mixing pass through the conducting pipe (14), the three-way switching valve (15) is in a first state, the conducting pipe (14) at the inlet end of the three-way switching valve is communicated with the first pipe (16) at the outlet end, the fibers blocked by slurry water mixing enter the first pipe (16), and during the process of passing through the first filter box (18), the blocking fibers in the slurry are filtered and retained by a filter screen in the first filter box (18), and the filtered slurry flows back to the flushing tank (13) through the first pipe (16) again to form a circulation;
s5, state judgment: in the filtering retention process, the energy consumption detection feedback module continuously detects the actual power consumption P of the motor and feeds the actual power consumption P back to the plc controller, and when the actual power consumption P of the motor is larger than the power consumption P2 when the motor normally runs, a first pressure difference sensor (23) arranged on the first filter box (18) monitors and feeds back the relative pressure difference value between the inlet end and the outlet end of the first filter box (18) to the plc controller in real time;
s6, backflushing regeneration: when the relative pressure difference value of the inlet end and the outlet end of the first filter box (18) rises to exceed the preset upper limit pressure difference value in a plc controller, the plc controller transmits an electric signal to a three-way switching valve (15), so that the three-way switching valve (15) is switched to a second state, a conducting pipe (14) at the inlet end of the three-way switching valve (15) is communicated with a second pipe (17) at the outlet end, the fibers blocked by mixing slurry and water are filtered at the second filter box (19) through the second pipe (17) and the second filter box (19), and simultaneously, the plc controller transmits an electric signal to a first discharge on-off valve (37), a second discharge on-off valve (39), a flushing pump (32) and a flushing three-way control valve (33), so that the first discharge on-off valve (37) is switched to an on state, the second discharge on-off valve (39) is switched to an off state, and the flushing three-way control valve (33) is switched to a first state, namely, a flushing pipe (31) at the inlet end of the filter is communicated with a first back flushing pipe (34) at the outlet end, under the working operation of a flushing pump (32), the filter is used for pumping pulp water in a flushing pool (13) to sequentially pass through the flushing pipe (31) and the first back flushing pipe (34) and back flushing a first filter box (18) so as to discharge the fiber mixed pulp water blocked from a first discharge pipe (36), and cleaning and regenerating a filter screen in the first filter box (18);
s7, stopping for preparation: after the blocked fibers are discharged, the first differential pressure sensor (23) monitors and feeds back the relative pressure difference value of the inlet end and the outlet end of the first filter box (18) to the plc controller in real time, and when the relative pressure difference of the inlet end and the outlet end of the first filter box is equal to the pressure difference in a normal state, the plc controller transmits an electric signal to the flushing pump (32) to close;
s8, cyclic regeneration: when the relative pressure difference value between the inlet end and the outlet end of the second filter box (19) rises to exceed the preset upper limit pressure difference value in a plc controller, the plc controller transmits an electric signal to a three-way switching valve (15), so that the three-way switching valve (15) is switched to a first state, a conducting pipe (14) at the inlet end of the three-way switching valve (15) is communicated with a first pipe (16) at the outlet end, the fibers mixed and blocked by the slurry and the water are enabled to pass through the first pipe (16) and the first filter box (18) again, the blocked fibers are filtered at the first filter box (18), and simultaneously, the plc controller transmits an electric signal to a first discharge on-off valve (37), a second discharge on-off valve (39), a flushing pump (32) and a flushing three-way control valve (33), so that the first discharge on-off valve (37) is switched to an off state, the second discharge on-off valve (39) is switched to a passage state, and the flushing three-way control valve (33) is, namely, the flushing pipe (31) at the inlet end is communicated with the second backwashing pipe (35) at the outlet end, under the working operation of the flushing pump (32), the flushing pump pumps the pulp water in the flushing pool (13) to sequentially pass through the flushing pipe (31) and the second backwashing pipe (35) and reversely flush the second filter tank (19) so as to discharge the blocked fiber mixed pulp water from the second discharge pipe (38), and the filter screen in the second filter tank (19) is cleaned and regenerated;
s9, recovering normal slurry pumping: if the relative pressure difference value between the inlet end and the outlet end of the second filter box (19) does not exceed the preset upper limit pressure difference value in the plc controller, the plc controller judges whether the actual power consumption P of the motor is less than or equal to the power consumption P2 when the motor normally runs, and if the actual power consumption P is kept to be greater than P2, the step returns to the step S5; if P is less than or equal to P2, the plc transmits an electric signal to the motor, the motor stops after running for a preset time T1 in the reverse direction, then the plc controller transmits electric signals to the front on-off valve (11), the rear on-off valve (12) and the first on-off valve (22) respectively, the front on-off valve (11) and the rear on-off valve (12) are switched to be in an on state, the first on-off valve (22) is switched to be in an off state, and then the slurry pump (3) normally runs and pumps slurry in the forward direction.
4. The method for controlling the production of the coreless three-dimensional toilet paper in the automatic production line of the coreless three-dimensional toilet paper according to claim 3, wherein: in step S5, during the filtering and retaining process, the plc controller determines whether the actual power consumption P of the motor is less than or equal to the power consumption P2 when the motor is operating normally, and if P is less than or equal to P2, the plc controller transmits an electrical signal to the motor, the motor stops after operating in reverse for a preset time T1, and then the plc controller transmits electrical signals to the front on-off valve (11), the rear on-off valve (12), and the first on-off valve (22), respectively, so that the front on-off valve (11) and the rear on-off valve (12) are switched to an on state, the first on-off valve (22) is switched to an off state, and then the slurry pump (3) operates normally to pump the slurry in the forward direction.
5. The method for controlling the production of an automatic production line of coreless three-dimensional toilet paper according to claim 3 or 4, wherein: in step S8, after the clogged fibers are discharged from the second filter tank (19) after being cleaned and regenerated, the second differential pressure sensor (24) monitors and feeds back the inlet and outlet relative pressure difference values of the second filter tank (19) to the plc controller in real time, when the inlet and outlet relative pressure difference values of the second filter tank (19) are equal to the normal state pressure difference, the plc controller transmits an electric signal to the washing pump (32) to close, and then the process returns to step S6.
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