Intelligent operation system of glue supply pump, control method and application

Abstract

The invention relates to the technical field of pump system control, and particularly discloses an intelligent operation system of a glue supply pump, which is characterized in that real-time operation frequencies of pump units in a parallel glue supply pump system are acquired, and a control module performs difference calculation on the real-time operation frequencies of the working pump units and adjusts parameters of the pump units; enabling the real-time operation frequency difference value to be within a set range; the alternate operation adjusting module of the control module controls the pump units to serve as standby pumps in turn within the set time. According to the control method, the difference value of the real-time operation frequency between the pump units serving as the working pumps is calculated, and adjustment is conducted when the difference value exceeds a set range; and when the standby pump exists, all the pump units serve as standby pump units in turn. According to the application of the intelligent operation system of the glue supply pump, the intelligent operation system of the glue supply pump is used in a glue supply station. The scheme is used for solving the problems that in the prior art, the quality of glue in pump units which do not work for a long time under the condition that multiple pumps are connected in parallel and corresponding glue barrels is reduced, and the glue is dry and hard.

Description

Technical Field

[0001] The present invention relates to the technical field of pump system control, and in particular to an intelligent operation system, a control method and an application of a glue supply pump. Background Art

[0002] In the pumping of fluids, different numbers of pump units are often required for simultaneous pumping according to different working conditions. This situation is called multi-pump parallel pumping. The number of pump bodies and the flow / pressure control of a single pump can be automatically adjusted through the adjustment module according to actual needs to ensure that the pump unit is in a high efficiency zone and ensure the efficient operation of the parallel pump bodies.

[0003] For example, the patent application date is 2021, and the patent publication number is CN114738229A, "A regulation system for a multi-pump parallel system based on artificial intelligence". This patent proposes to influence the pump system through the working parameters and working status of the pump unit, and obtain the relationship between the flow rate of the pump system and the working status of the pump unit, and then obtain the working parameters of the unit, so as to achieve reasonable allocation of the working parameters of the pump unit while meeting the needs of the pump system, with high adjustment accuracy, improve the working efficiency of the pump unit, make the working pump unit in an efficient working state, and suspend the work of the pump unit that does not need to work; at the same time, when the overall demand of the pump system changes, the working status of the pump unit can be adjusted in time to adapt to the changes in the demand of the pump system.

[0004] For further optimization control of the operation of parallel pump bodies, the patent publication number CN118166875A with an application date of 2024 and a "A method for operating a multi-pump parallel constant pressure water supply system" proposed "by calculating and comparing the current single pump efficiency with the single pump efficiency after adding / reducing the pump, and executing automatic pump addition and subtraction logic according to the comparison results. Compared with the traditional method of adding and subtracting pumps by setting the operating frequency, the system is always maintained in the high-efficiency zone to reduce system energy consumption". That is, the latest technology this year proposed that when the pump body efficiency is not within the set range, the number of pump bodies is automatically increased or decreased to ensure that the entire parallel pump system is operating in the high-efficiency zone.

[0005] However, the current parallel delivery pump system is basically aimed at liquids with high fluidity, such as water. During the pumping process, such high-fluidity media rarely stay in the pump body. However, for adhesives with a certain viscosity or even with abrasive filler particles (such as adhesives used in the fields of automobiles, new energy, electronics, construction, packaging, etc., the filler particles in the adhesives include glass beads, rubber beads, etc.), when the rubber is pumped, the lower pump body is fixedly connected to the pressure plate that extends into the rubber barrel, and the pressure plate presses on the rubber, so that the rubber in the rubber barrel will not be mixed with gas or very little gas is mixed with gas, and at the same time, the pressure The plate will drop as the rubber liquid level drops (such as the "A double-column electric glue pump" with patent announcement number CN210847007U and the "Glue barrel working parameter acquisition device for automobile glue supply control" with CN211904232U both record the working conditions of the pump unit). Therefore, the existence of the pressure plate makes the rubber barrel have a relatively large pressure, and each pump unit can only pump the rubber in the corresponding rubber barrel. Once a pump unit stops working for a long time, the rubber in the pump unit and the rubber barrel will have problems such as reduced rubber quality and drying of the rubber due to the long-term non-flow of the rubber. Summary of the invention

[0006] The present invention is intended to provide an intelligent operation system for a glue supply pump to solve the problems of glue quality degradation and glue drying in a pump unit and a corresponding glue barrel that have not been working for a long time when multiple pumps are connected in parallel in the prior art.

[0007] In order to achieve the above object, the present invention adopts the following technical scheme:

[0008] An intelligent operation system of a glue supply pump is used to control a parallel glue supply pump system, comprising a control module and a monitoring module, wherein the monitoring module is used to collect the real-time operation frequency of all pump units in the parallel glue supply pump system, wherein all pump units include working pump units and standby pump units;

[0009] The control module calculates the difference of the real-time operating frequency of the working pump unit. When the difference exceeds the set range, the control module adjusts the input parameters of the pump unit with too high or too low operating frequency until the real-time operating frequency difference is within the set range;

[0010] The control module also includes an alternating operation adjustment module, which is used to control the pump units to take turns as the standby pump units within a set time when there are standby pump units in the parallel glue supply pump system.

[0011] The principle and advantage of this scheme are: when this scheme is adopted, the real-time operating frequency of each pump unit in the parallel glue supply pump system is monitored by the monitoring module, and when the operating frequency difference between the pump units serving as working pumps exceeds the set range, the working input parameters of the pump units are controlled to ensure that each pump unit operates at a similar operating frequency, thereby avoiding the problem of increased shutdown and maintenance times of the parallel glue supply pump system due to excessive wear of wearing parts caused by excessively high operating frequency of a single pump unit (for the case where all pump units are to be used as working pumps, if one pump unit needs to replace parts, the entire parallel glue supply pump system will not work, affecting normal production; and because the wearing parts in the pump unit are generally seals, the seals of each pump unit as wearing parts will wear after working for a certain period of time, so they all need to be replaced), that is, it is ensured that the wearing parts of all pump units are in a relatively consistent wear condition, thereby reducing the shutdown and maintenance frequency of the parallel glue supply pump system and ensuring production efficiency; in addition, keeping all working pump units in a basically consistent working state can also extend the life of the wearing parts in the pump unit, thereby improving the reliability and service life of the glue supply station.

[0012] In addition, on the basis of ensuring that multiple pump units operate at similar working frequencies, the pump units are controlled by alternately running the adjustment modules to take turns as standby pump units within the set time, ensuring that the quality of the rubber is guaranteed and the rubber is switched from the standby pump to the working pump before it dries up, so that the rubber can be used in time, thereby avoiding problems such as the rubber in the pump or the rubber being pumped being degraded and dried up due to one or several pump units being used as standby pump units for a long time.

[0013] Preferably, as an improvement, the control module calculates the required number of working pump units based on the total outlet flow rate requirement of the parallel glue supply pump system and the requirement that a single working pump unit is in the high-efficiency zone, so as to ensure that all working pump units are in the high-efficiency zone of the motor, thereby improving energy utilization efficiency, extending the service life of the motor of the pump unit, and reducing maintenance costs.

[0014] Preferably, as an improvement, each pump unit includes a linear reciprocating drive and a lower pump body, the linear reciprocating drive drives the input end of the lower pump body to reciprocate to achieve continuous pumping of the rubber material, and the monitoring module is also used to monitor the upper stroke speed and the lower stroke speed of the linear reciprocating drive;

[0015] The control module issues a warning when the real-time upstroke speed and / or downstroke speed exceeds a preset value; alternatively, the control module calculates the up and down stroke speed difference based on the up and down stroke speeds, and issues a warning when the up and down stroke speed difference exceeds a set speed difference range.

[0016] Preferably, as an improvement, when a warning prompt is issued, if only the stroke speed at one end is higher than a preset range, the warning prompt indicates that the wearing parts at that end are damaged. When the speed of the piston rod when moving toward one end becomes significantly faster, it means that the wearing parts at the corresponding end (wearing parts such as the throat, sealing assembly, piston assembly) are worn and internal leakage has occurred. At this time, according to the present scheme, the direction of the wear can be determined in time, so that possible wear conditions can be dealt with in time to avoid greater damage caused by increased wear.

[0017] Preferably, as an improvement, the monitoring module is also used to monitor the outlet pressure of each pump unit. When the outlet pressure is always lower than the preset outlet pressure within a set time, the control module issues a leakage alarm and / or controls the parallel glue supply pump system to shut down, so as to avoid pollution and loss caused by leakage of glue and ensure safe operation.

[0018] Preferably, as an improvement, the monitoring module is also used to calculate the cumulative glue output according to the operating frequency of the working pump and the glue output of each reciprocating operation of the working pump.

[0019] Preferably, as an improvement, each pump unit includes a linear reciprocating drive and a lower pump body, the linear reciprocating drive drives the input end of the lower pump body to reciprocate to achieve continuous pumping of the rubber, each pump unit has a corresponding brake, the control module is electrically connected to the brake, and the control module is used to control the brake to brake at least one of the input end of the linear reciprocating drive, the output end of the linear reciprocating drive, and the input end of the lower pump body after the linear reciprocating drive has no output for more than a set time.

[0020] In the prior art, in order to ensure the normal use of downstream equipment for the supply of high-viscosity adhesives, it is necessary to ensure that a certain pressure is always maintained at the glue supply output end, which is usually between 70 and 300 bar, to ensure a higher flow rate / high flow rate of the adhesive sent to the downstream. At the same time, when supplying glue, it is necessary to ensure that the glue supply output end provides a long-term and stable supply to the downstream. The pump unit is required to work-hold pressure cycle mode. When working, the pump unit pumps the adhesive to the output pipeline, and when holding pressure, the downstream valve of the output pipeline is closed, and the output pipeline is maintained at the set pressure. At this time, although the pump unit has no output, it needs to withstand the pressure at the output end; the pressure will react on the lower pump body and be transmitted to the linear reciprocating drive, thereby forcing the linear reciprocating drive to withstand a large torque without motion output when holding pressure. Without output, the input energy of the linear reciprocating drive is basically converted into heat energy, which brings about rapid temperature rise, which is not conducive to extending the life of the linear reciprocating drive. At present, the conventional method is to set a cooling fan to continuously cool the linear reciprocating drive. However, the temperature of the linear reciprocating drive is very high in the stopped state, and both the linear reciprocating drive and the cooling fan consume energy, which increases the energy consumption and also causes great noise due to the operation of the cooling fan.

[0021] The present solution sets a brake, and after the linear reciprocating drive has no output for a certain period of time, the brake is activated to ensure that the lower pump body is no longer pumping. The brake is used to actively limit the output or input end of the linear reciprocating drive or directly control the operation of the input rod (piston rod) of the lower pump body. The brake ensures that when the lower pump body is stopped, the linear reciprocating drive is in a low-energy or even no-energy state, thereby avoiding the heating of the linear reciprocating drive when the lower pump body is stopped. The braking energy consumption of the brake is much lower than the energy consumption of the linear reciprocating drive when actively overcoming high torque, and the design of the cooling fan is eliminated, thereby achieving energy saving and noise reduction. More importantly, the service life of the linear reciprocating drive driven by the motor is prolonged, so that the application of the motor-type linear reciprocating drive on the pump unit can be realized.

[0022] In addition, the present solution executes the brake after the pump unit has no output, which helps to extend the service life of the brake and avoid the possibility of false triggering of the brake, which, once falsely triggered, will cause damage to the pump unit.

[0023] Preferably, as an improvement, the following conditions need to be met when the brake is activated: Condition 1 is that the output of the pump unit is lower than the set value for a continuous set time or the motor speed of the pump unit is lower than the set value for a continuous set time; Condition 2 is that the outlet flow of the pump unit is lower than the set value for a continuous set time or the outlet pressure change rate of the pump unit is lower than the set value for a continuous set time, further ensuring that the brake will not be triggered inadvertently.

[0024] The present invention also provides a control method for controlling a parallel glue supply pump system, comprising the following steps:

[0025] S1. Real-time monitoring of the real-time operating frequency of all pump units in the parallel glue supply pump system;

[0026] S2. Calculate the difference in real-time operating frequency between the pump units serving as working pumps, and adjust the pump unit with too high or too low operating frequency when the difference exceeds a set range, so that the operating frequencies of all working pumps tend to be consistent;

[0027] S3. When there is a standby pump in the parallel glue supply pump system, all pump units take turns to serve as standby pump units.

[0028] Preferably, as an improvement, the required number of working pump units is calculated according to the total outlet flow rate requirement of the parallel glue supply pump system and the requirement that a single working pump unit is in a high efficiency zone.

[0029] Preferably, as an improvement, for the pump body in the pump unit that realizes continuous feeding by reciprocating drive, the up and down stroke speeds of the reciprocating movement are monitored, and when the single-end stroke speed exceeds a preset value or the two-end stroke speed difference exceeds a set range, an early warning prompt of damage to wearing parts is issued.

[0030] Preferably, as an improvement, the outlet pressure of each pump unit is monitored, and when the outlet pressure is always lower than the preset outlet pressure within a set time, the control module issues a leakage alarm and / or controls the parallel glue supply pump system to shut down.

[0031] Preferably, as an improvement, after the pump unit is changed from the tooling state to the stalled state, the power input end or the power output end of the stopped pump unit is braked by a provided brake.

[0032] Preferably, as an improvement, the following conditions need to be met when the brake is activated: Condition 1 is that the output of the pump unit is lower than the set value for a continuous set time or the motor speed of the pump unit is lower than the set value for a continuous set time; Condition 2 is that the outlet flow of the pump unit is lower than the set value for a continuous set time or the outlet pressure change rate of the pump unit is lower than the set value for a continuous set time.

[0033] The present invention also provides an application of an intelligent operation system of a glue supply pump, which is used to use the intelligent operation system of the glue supply pump in a glue supply station.

[0034] Preferably, as an improvement, the pump unit in the parallel glue supply pump system includes a linear reciprocating drive driven by a motor and a lower pump body, and the linear reciprocating drive is a screw drive or a motor-driven rack and pinion drive.

[0035] In summary, the present invention has the following effects:

[0036] First, efficient operation function: when multiple pumps are in parallel operation, the standby pump units can be operated intelligently and alternately, and the pump units can be operated in an adaptive manner with respect to the reciprocating frequency in the efficient zone, thus avoiding the problem in the prior art that some pumps work too fast and easily lead to accelerated wear of vulnerable parts, while some pump units are not in efficient operation. When the required output is small and the operating frequencies of all pump units are low, the system calculates the number of working pumps and allows all pump units to take turns as standby pumps within the set time, thus avoiding the problems of rubber drying and quality degradation, and allowing the working pumps to always work in the efficient zone.

[0037] Second, intelligent operation and maintenance function: maintenance suggestions are given based on the operating frequency of the pump unit, the difference in speed between the upper and lower strokes, and other criteria. For example, when the speed of the upper stroke is significantly higher than that of the lower stroke, or higher than the expected set value, an early warning prompt can be issued that indicates damage to the corresponding wearing parts of the upper stroke, such as the valve core and valve seat.

[0038] Third, safe operation function: when the system detects that the leakage exceeds the set value, it will automatically alarm and shut down to prevent large amounts of glue from leaking out and causing pollution and losses, thus ensuring safe operation.

[0039] Fourth, energy-saving function: compared with the existing electric linear reciprocating drive, the present invention is provided with a brake. When the outlet output flow rate of the pump unit is lower than the set value (often the set value is close to zero) for a continuous period of time, that is, the pump unit is in a pressure-holding condition, after the pressure-holding condition has lasted for a set time, such as several seconds, the brake is activated, and the input of the linear reciprocating drive's own resistance torque is disconnected, that is, the linear reciprocating drive is in a suspended state under the pressure-holding condition. Compared with using the brake under the pressure-holding condition and only using the excitation of the pump unit's own motor to automatically stop, the method of using the brake to brake under the pressure-holding condition can be compared with the excitation braking method of the pump unit. The working temperature is about 10°C lower, and as the working time of the pump unit is extended, the working temperature of the pump unit that is activated by the brake under the holding pressure condition can be more than 14°C lower than the existing pump unit's own excitation brake stop temperature. It can be seen that compared with the existing technology, this solution greatly reduces the heat generation and energy consumption caused by the linear reciprocating drive in the pump unit for holding pressure, and the braking energy consumption of the brake in the holding pressure stage is very low, which not only ensures the energy consumption of the pump unit under the working-holding pressure cycle condition, but also greatly reduces the temperature of the linear reciprocating drive when it is working, ensuring the feasibility of the linear reciprocating drive under high-viscosity, high-pressure, and high-flow rate adhesive pumping. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of Embodiment 1 of the present invention.

[0041] Figure 2 This is a flow chart of Embodiment 2 of the present invention.

[0042] Figure 3 This is a simplified schematic diagram of a multi-parallel glue supply pump system according to an embodiment of the present invention (the parallel glue supply pump system in this figure is applied to a primary glue supply as an example).

[0043] Figure 4 It is a line graph of temperature change and temperature difference change of test A and test B of the embodiment of the present invention.

[0044] Figure 5 This is a temperature variation diagram of Test C of Example 1 of the present invention.

[0045] Figure 6 This is a temperature variation diagram of Test D of Example of the present invention.

[0046] Figure 7 This is a temperature variation diagram of Test E of Example of the present invention.

[0047] Figure 8 Schematic diagram of the structure of a single pump unit of this embodiment.

[0048] Fig. 9 Schematic diagram of the three-dimensional structure of the linear reciprocating drive according to the fourth embodiment of the present invention.

[0049] Fig.10 for Fig. 9 Rear view of.

[0050] Fig.11 for Fig. 9 Schematic diagram of the axial section of the servo motor.

[0051] Fig.12 It is a schematic diagram of the three-dimensional structure of the linear reciprocating drive according to the fifth embodiment of the present invention.

[0052] Fig.13 for Fig.12 Schematic diagram of the axial section.

[0053] Fig.14 This is a schematic diagram of the three-dimensional structure of the fifth embodiment, which only shows the combination of the lead screw, the nut, the guide seat, and the adapter sleeve.

[0054] Fig.15 for Fig.14 main view.

[0055] Fig.16 for Fig.15 AA rotated section view in.

[0056] Fig.17 for Fig.14 Exploded diagram of the lead screw, guide seat, and adapter sleeve.

[0057] Fig.18 for Fig.17 Schematic diagram of the three-dimensional structure after rotating 90°. DETAILED DESCRIPTION

[0058] The following is further described in detail through specific implementation methods:

[0059] The reference numerals in the drawings of the specification include: a pump unit 1 , a pressure plate 2 , a rubber barrel 3 , a linear reciprocating driver 10 , a pump body 20 , a driving rod 201 , a brake disc 301 , a brake adapter disc 302 , and an encoder 40 .

[0060] Embodiment 4: servo motor 1 , housing 11 , rotating main shaft 101 , driving gear 102 , reduction gear assembly 2 , first transmission gear 21 , first transmission pinion 22 , second transmission gear 23 , second transmission pinion 24 , rack 25 .

[0061] Embodiment 5: housing 11 , stator 12 , rotor 101 , ball screw 13 , oil filling hole 131 , lead screw 14 , guide seat 15 , guide groove 151 , oil filling channel 152 , rolling element 16 , adapter sleeve 17 , limit sleeve 18 , oil passage 181 , annular groove 182 .

[0062] The embodiment is basically as shown in the attached Figures 1 to 3 shown.

[0063] The invention discloses an intelligent operation system of a glue supply pump, which is used to control a parallel glue supply pump system. The parallel glue supply pump system includes a plurality of parallel pump units, each of which includes an electric linear reciprocating drive and a lower pump body. The output rod of the electric linear reciprocating drive moves linearly and reciprocatingly, and the output rod is fixedly connected to the input rod of the lower pump body, and drives the lower pump body to continuously feed the glue in the glue barrel through reciprocating linear movement.

[0064] The intelligent operation system of the glue supply pump includes a monitoring module and a control module.

[0065] Monitoring module: collects the real-time operating frequency, outlet pressure, outlet flow rate, linear reciprocating stroke speed of all pump units in the parallel glue supply pump system, and the total outlet flow rate of the parallel glue supply pump system. The monitoring module transmits all the collected data to the control module.

[0066] Control module: responsible for processing data and issuing control instructions. The processed data includes real-time working frequency difference calculation, working pump unit quantity calculation, upper and lower stroke speed difference calculation, etc. The control instructions include adjusting the working pump unit input parameters, alternating operation adjustment of the pump unit as a backup pump, early warning prompts, external leakage alarm reminders and brake start and stop control, etc.

[0067] The main functions of the intelligent operation system of the glue supply pump include:

[0068] 1. Real-time operating frequency difference calculation: The control module performs difference calculation on the real-time operating frequency of the working pump unit. When the difference exceeds the set range, the control module adjusts the input parameters of the pump unit with too high or too low operating frequency until the real-time operating frequency difference is within the set range, ensuring that the working pump units are in a basically consistent working state and avoiding the situation where some pump units work too fast or too slow.

[0069] 2. Alternating operation adjustment: The control module also includes an alternating operation adjustment module. When there is a spare pump unit in the parallel glue pump system, the control pump unit is controlled to take turns as the spare pump unit within the set time to ensure the uniform use of each pump unit, extend the service life, and avoid the drying of the glue or the deterioration of the glue quality.

[0070] 3. Calculation of the number of working pump units: Based on the total outlet flow rate requirements of the parallel glue supply pump system and the requirements that a single working pump unit is in the high-efficiency zone, the control module calculates the required number of working pump units and makes corresponding alternating operation adjustments to ensure that the working pumps are working in the high-efficiency zone. At the same time, all pump units take turns working as backup pumps without affecting the quality of the rubber and without the rubber drying up, ensuring uniform operation of the pump units.

[0071] The control module stores the working frequency range of the pump unit in the high-efficiency working zone when pumping adhesives of different properties. When calculating the working number of the pump unit, the control module calls the working frequency of the pump unit in the high-efficiency zone under the corresponding adhesive according to the type of adhesive to ensure the service life of the pump unit.

[0072] 4. Early warning: When the real-time upstroke speed and / or downstroke speed exceeds the preset value, the control module issues an early warning; or, the control module calculates the up and down stroke speed difference based on the up and down stroke speeds, and issues an early warning when the up and down stroke speed difference exceeds the set speed difference range. When the early warning is issued, if only one end of the stroke speed is higher than the preset range, the early warning indicates that the vulnerable parts at that end are damaged.

[0073] 5. External leakage alarm reminder: When the outlet pressure of the pump unit is always lower than the preset outlet pressure within the set time, the control module will issue an external leakage alarm reminder and / or control the parallel glue supply pump system to shut down.

[0074] 6. Total glue output monitoring: The control module calculates the cumulative glue output based on the sum of the reciprocating operation frequencies of all working pumps in the parallel glue supply pump system and the product of the glue output of each reciprocating stroke of a single pump unit.

[0075] 7. Control the start and stop function of the brake: Each pump unit has a corresponding brake, and the control module is electrically connected to the brake. The control module is used to control the brake to brake at least one of the input end of the linear reciprocating drive, the output end of the linear reciprocating drive, and the input end of the lower pump body after all the braking conditions are met.

[0076] Braking conditions: Condition 1: The output of the pump unit is lower than the set value for a continuous set time or the motor speed of the pump unit is lower than the set value for a continuous set time. Condition 2: The outlet flow of the pump unit is lower than the set value for a continuous set time or the outlet pressure change rate of the pump unit is lower than the set value for a continuous set time. The set values ​​of this condition in the specific embodiment tend to zero.

[0077] The following is an explanation with a specific case:

[0078] Case 1: For the case where the adhesive is PVC containing glass beads, it is highly abrasive. Assuming that the number of parallel pump units in the parallel glue pump system is 3, in the pumping of the adhesive, the working frequency requirement of the pump unit when it is in the high-efficiency zone is not less than 8cycs / min, and not more than 15cycs / min. If the total outlet flow rate requirement of the parallel glue pump system is 8L / min, then at this time, 2 pump units are required as working pumps and 1 pump unit is used as a standby pump. Each of the 2 working pumps is allocated 4L / min. Assuming that the reciprocating glue output of each pump unit is 0.45L, the requirement for the working pump unit under 4L / min is 8.8cycs / min, which falls exactly into the high-efficiency working area of ​​the pump unit and avoids the problem of a single pump working too fast. In order to avoid the problem of the standby pump drying out and the quality of the rubber being affected, all pump units are controlled by the control module to take turns as standby pumps in sequence to ensure that the rubber can be replaced regularly.

[0079] Case 2: When the usage scenario changes, for example, the particles in the adhesive are replaced with rubber beads. Under this type of adhesive, the operating frequency requirement of the pump unit in the high-efficiency zone is not less than 10 cycs / min and not more than 20 cycs / min. When the total outlet flow rate requirement of the parallel glue supply pump system is 8L / min, the control module calculates that only one pump unit is needed as the working pump and the remaining two pump units are used as standby pumps. At this time, all pump units are controlled to take turns as working pumps in sequence, and the remaining pumps also take turns as standby pumps in the combination order.

[0080] Embodiment 2

[0081] The second embodiment provides a control method for controlling the parallel glue supply pump system of the first embodiment, comprising the following steps:

[0082] S1. Use a monitoring module to monitor the real-time operating frequency, pump unit outlet pressure, pump unit outlet flow, linear reciprocating stroke speed of the pump unit and the total outlet flow rate of the parallel glue supply pump system of all pump units in the parallel glue supply pump system in real time;

[0083] S2. Calculate the difference in real-time operating frequency between the pump units serving as working pumps using the control module, and adjust the pump unit with too high or too low operating frequency when the difference exceeds a set range, so that the operating frequencies of all working pumps tend to be consistent;

[0084] S3. The control module calculates the required number of working pump units based on the total outlet flow rate requirement of the parallel glue supply pump system and the requirement that a single working pump unit is in the high-efficiency zone, and allows the remaining standby pump units to take turns in sequence as standby pump units within the set time to ensure regular replacement of the glue in the pump units.

[0085] S3, early warning prompt: When the real-time upstroke speed and / or downstroke speed exceeds the preset value, the control module issues an early warning reminder; or, the control module calculates the up and down stroke speed difference based on the up and down stroke speeds, and issues an early warning prompt when the up and down stroke speed difference exceeds the set speed difference range. When the early warning prompt is issued, if only one end of the stroke speed is higher than the preset range, the early warning prompt indicates that the wearing parts at that end are damaged.

[0086] When the outlet pressure of the pump unit is always lower than the preset outlet pressure within a set time, the control module issues a leakage alarm and / or controls the parallel glue supply pump system to shut down.

[0087] Control brake start and stop function: Each pump unit has a corresponding brake, and the control module is electrically connected to the brake. The control module is used to control the brake to brake at least one of the input end of the linear reciprocating drive, the output end of the linear reciprocating drive, and the input end of the lower pump body after all braking conditions are met.

[0088] Braking conditions: Condition 1: The output of the pump unit is lower than the set value for a continuous set time or the motor speed of the pump unit is lower than the set value for a continuous set time. Condition 2: The outlet flow of the pump unit is lower than the set value for a continuous set time or the outlet pressure change rate of the pump unit is lower than the set value for a continuous set time. The set values ​​of this condition in the specific embodiment tend to zero.

[0089] Taking the specific verification tests A and B as examples, two identical pump units are taken. The linear reciprocating drives of the pump units both use frameless motors. The frameless motors can use excitation to brake the rotor. At the same time, the frameless motor of test B is equipped with a brake that can brake the rotor. The two pump units of tests A and B are allowed to work for more than 3 hours in exactly the same working environment (ambient temperature 20℃-22℃), in exactly the same working mode (working 20s-holding pressure 40s cycle) and under exactly the same working pressure (working pressure is 180bar, which is the pressure that needs to be maintained on the output pipeline of the pump unit).

[0090] During the more than three-hour test process, Test A used the motor's own excitation to brake the vehicle during each 40-second pressure-holding stage, while Test B used the frameless motor's excitation to brake the motor rotor at the beginning of the pressure-holding stage until the rotor came to a complete stop during the pressure-holding stage. The brake was then activated to brake the rotor. After the brake was applied, the input to the frameless motor was stopped, allowing the brake to independently withstand the pressure-holding torque.

[0091] Specifically, the brake activation conditions of Test B are as follows: Condition 1) the rotor speed is reduced to less than 3RPM, Condition 2) the rotor speed change rate is less than 0.01RPM / s, Condition 3) the pump unit outlet pressure change rate is less than 0.001bar / s, and after satisfying Conditions 1)-3) for a duration of more than 1 to 3 seconds, ensure that the rotor has stopped rotating by utilizing the excitation brake, and then activate the brake mode to allow the brake to resist the torque caused by the pressure holding. During the pressure holding stage, the time for utilizing the brake to resist the torque caused by the working pressure occupies most of the pressure holding time (in the 40 seconds of pressure holding, the time for utilizing the frameless motor excitation braking is about 3s, and the braking time for the brake is about 37s), so that the frameless motor is completely paused for most of the time during the pressure holding stage, thereby avoiding the heat caused by the pressure holding in the frameless motor.

[0092] The test process is to monitor the winding temperature of the frameless motor in real time, record the average temperature in each cycle, and draw a temperature change graph based on the temperature of each cycle (the temperature can be the average temperature in each cycle or the temperature at the end. This test uses the average temperature obtained by averaging multiple groups of temperatures tested in each 1-minute cycle). The specific test records are shown in the following table. The temperature changes and temperature difference changes drawn according to the following table are shown in the figure below. Figure 4 shown.

[0093] Test process record sheet for test A and test B

[0094]

[0095]

[0096]

[0097] From the test results of Test A and Test B, it can be seen that after working continuously for more than 3 hours in the mode of working for 20 seconds and holding pressure for 40 seconds, the winding temperature of Test B after braking by brake intervention in the holding pressure stage was only below 43°C, while Test A relied on excitation braking throughout the holding pressure stage, and the winding temperature exceeded 55°C, even reaching 57°C.

[0098] At present, the normal working state of high-viscosity and high-pressure pumping is continuous operation for more than 3 hours. Under this normal condition, the winding temperature of the frameless motor of test A has reached 57°C, which has a great negative impact on the life of the motor. According to the trend in the attached figure, if the operation continues, the temperature will continue to rise, which will greatly affect the life of the frameless motor.

[0099] In contrast, Test B in the present embodiment adds and controls the brake so that the maximum temperature does not exceed 43°C after 3 hours of continuous operation, which significantly reduces the temperature of the frameless motor during pumping operation, and helps to achieve intermittent pumping of the electric linear reciprocating drive under high viscosity and high pressure conditions. After adopting the scheme of Test B, not only the temperature is reduced, but also the energy consumption caused by the excitation braking of the frameless motor is greatly saved, which helps to promote energy conservation and environmental protection. In addition, under the scheme of Test B, the maximum temperature can be kept below 43°C without the need for a cooling fan, and the cooling fan can be omitted in actual applications, thereby reducing costs and reducing the noise when the pump unit is working.

[0100] In addition, in Test B, it is clearly seen that after 3 hours of continuous operation, the temperature rise rate of the winding slows down. In order to verify whether the slow temperature rise trend is maintained if the test is continued for a longer time under the scheme of Test B, the inventors conducted Test C using the brake to brake in the pressure holding stage. The test conditions of Test C are the same as those of Test B, except that the test time is longer, which is extended to 4.5 hours. The temperature change diagram obtained from the test results is as follows: Figure 5 As shown, in test C, after working for 3 hours, the temperature was close to 43°C, and after working for 4.5 hours, the winding temperature was only around 45°C.

[0101] Under the excitation braking of the frameless motor, it can be seen from test A that the temperature rises in a sawtooth shape within 3 hours of the test. In order to avoid the accidental nature of the test, the inventors conducted test D with the same equipment, the same ambient temperature, and the same working pressure as test A. In test D, the winding temperature reached 51°C after 2 hours of testing (combined with Figure 6 The temperature change diagram of test D is basically consistent with that of test A, and the temperature rise of test D still shows a sawtooth change.

[0102] Therefore, the inventors conducted another test E. The difference between the test E and the test D is that the test time is longer, 400 minutes. The test results are as follows: Figure 7 As shown, Figure 7In the experiment, the winding temperature of the frameless motor still rises in a sawtooth shape. Combining experiments A, D and E, it can be seen that the change in temperature for frameless motors using excitation braking reflects the change in the frameless motor. After 4.5 hours of testing, the winding temperature was already at 60°C, and the temperature difference with that in experiment C during this period reached 15°C. Experiment E continued to test, and the temperature continued to rise. After 5.5 hours of testing, the temperature rise approached 64°C. This sawtooth temperature rise illustrates the instability of the frameless motor in the working-pressure holding cycle working mode, which is not conducive to the long-term use of the frameless motor in the working-pressure holding cycle mode. After the present invention uses the brake as shown in experiments B and C, the temperature is lower, and the temperature rise slows down after long-term use. The temperature rise of the frameless motor is also stable, which is more conducive to the use of the frameless motor in all aspects, and the superiority of the solution under the brake is more prominent.

[0103] Embodiment 3

[0104] This embodiment provides an application of an intelligent operation system of a glue supply pump based on the first embodiment, which is used to use the intelligent operation system of the glue supply pump in a glue supply station.

[0105] Combination Figure 8 In a specific application, the pump unit in the parallel glue supply pump system in the first embodiment includes a linear reciprocating drive 10 driven by a motor and a lower pump body 20. The linear reciprocating drive 10 is a screw drive or a motor drives a gear rack. The lower pump body 20 is a plunger pump, such as a high-pressure plunger pump with patent announcement number CN218266205U. The output of the linear reciprocating drive 10 is fixedly connected to the driving rod 201 of the plunger pump 20, so that the reciprocating output movement of the linear reciprocating drive 10 drives the reciprocating movement of the driving rod 201 to achieve continuous glue pumping.

[0106] The working cycle of the pump unit is a cycle of working for 20s and stopping for 40s. At the beginning of stopping, the motor of the linear reciprocating drive 10 itself overcomes the torque from the lower pump body autonomously until the lower pump body has no output and lasts for several seconds, such as 5 seconds. At the same time, the outlet pressure change rate of the pump unit remains unchanged for at least several seconds, such as 5 seconds, or the flow rate at the outlet of the pump unit approaches zero for several seconds. After the lower pump body is completely stopped, the brake is started to brake at least one of the input end of the linear reciprocating drive, the output end of the linear reciprocating drive, and the input end of the lower pump body. After the brake is started, the input of the linear reciprocating drive to overcome the torque is released, so that the linear reciprocating drive stops working during the stopping time and after the brake is turned on.

[0107] If during the holding time, after the simple brake is applied, a small amount or trace of rubber flows out of the pump unit outlet, the flow in this state is monitored by the monitoring module. When the controller determines that the outflowing rubber flow is greater than the set value in this state, it controls the linear reciprocating drive to start and cooperate with the brake to overcome the torque of the lower pump body, ensuring that no rubber flows out of the pump unit outlet in the holding state, thereby ensuring the accuracy of the glue supply of the entire parallel glue pump system.

[0108] Embodiment 4

[0109] Combination Figures 9 to 11 This embodiment has the following improved designs based on the third embodiment. Specifically, the linear reciprocating drive 10 selected in this embodiment is a mode in which a motor drives a gear rack, which is as follows:

[0110] The linear reciprocating drive 10 includes a servo motor 1 and a reduction gear assembly 2. The servo motor 1 can rotate forward and reverse. The output of the servo motor 1 is a rotating spindle 101 that can rotate forward and reverse. The rotating spindle 101 drives the reduction gear assembly 2 to reduce speed and finally outputs linearly with a rack 25.

[0111] The brake 30 is installed in the housing 11 of the servo motor 1 to lock the rotating spindle 101. Specifically, one end of the brake 30 is fixed in the housing 11 of the servo motor 1, and the brake disc 301 (such as the armature of the disc electromagnetic brake 30) at the other end of the brake 30 is fixed to the brake adapter disc 302 by screws, and the brake adapter disc 302 is fixed on the rotating spindle 101, so that the brake disc 301 brakes the rotating spindle 101 through the brake adapter disc 302 during braking.

[0112] An encoder 40 is mounted on the housing 11 . The encoder 40 is a part of a monitoring module and is used to monitor the rotation speed of the rotating spindle 101 .

[0113] The relationship between the rotating main shaft 101 and the reduction gear assembly 2 can be as follows:

[0114] A driving gear 102 is fixed on the rotating main shaft 101, and the reduction gear assembly 2 includes a first transmission shaft and a second transmission shaft rotatably connected to the casing, a first transmission gear 21 and a first transmission pinion 22 are fixedly mounted on the first transmission shaft, and a second transmission gear 23 and a second transmission pinion 24 are fixed on the second transmission shaft. The first transmission gear 21 of the first transmission shaft is meshed with the driving gear 102, and the first transmission pinion 22 is meshed with the second transmission gear 23. The reduction gear set also includes a rack 25 slidably connected to the casing, and the second transmission pinion 24 is meshed with the rack 25. The rotating main shaft 101 of the servo motor 1 drives the gears of the reduction gear assembly 2 to rotate for deceleration, and finally drives the rack 25 to move linearly after deceleration.

[0115] In this embodiment, the driving gear 102 on the rotating main shaft 101 of the servo motor 1 drives the first transmission gear 21 to rotate, so that the first transmission pinion 22 coaxially connected to the first transmission gear 21 drives the second transmission gear 23 to rotate, and then the second transmission pinion 24 coaxially connected to the second transmission gear 23 drives the rack 25 to output linear motion.

[0116] The entire linear reciprocating drive 10 can achieve a large torque output of the linear reciprocating drive 10 through the transmission of the servo motor 1 and the reduction gear assembly 2. At the same time, the brake 30 can be used to replace the input of the servo motor 1 to overcome the pressure-holding torque during the pressure-holding pause stage, ensuring that the entire linear reciprocating drive 10 does not heat up too quickly during the pressure-holding pause stage and affect the life of the motor.

[0117] Embodiment 5

[0118] Combination Figures 12 to 18 This embodiment is improved on the basis of the third embodiment as follows. Specifically, the linear reciprocating drive 10 selected in this embodiment is a frameless motor with a stator 12 and a rotor 101, as follows:

[0119] The linear reciprocating drive 10 includes a housing 11, a stator 12 fixed in the housing 11, a rotor 101 rotatably connected in the housing 11, a ball screw 13 that rotates synchronously with the rotor 101, and a lead screw 14 that moves axially in the ball screw 13. After the linear reciprocating drive 10 energizes the stator winding, the rotor 101 rotates, thereby driving the nut 13 to rotate synchronously, so that the lead screw 14 can achieve linear output. In this embodiment, one axial end of the nut 13 is limited by a step machined in the rotor 101, and the other axial end of the nut 13 is limited by an annular limit sleeve 18 fixed on the rotor 101 (the annular limit sleeve 18 is threadedly connected to the rotor).

[0120] The brake 30 is installed in the housing 11, one end of the brake 30 is fixed in the housing 11, and the brake disc 301 (such as the armature of the disc electromagnetic brake 30) at the other end of the brake 30 is fixed on the brake adapter disc 302, and the brake adapter disc 302 is fixedly connected to the rotor 101, so that the brake disc 301 brakes the rotor 101 through the brake adapter disc 302 during braking.

[0121] An encoder 40 is mounted on the housing 11 . The encoder 40 is a part of a monitoring module and is used to monitor the rotation speed of the rotating spindle 101 .

[0122] In this embodiment, the rotor 101 is braked by the brake 30, so that the power source of the pump unit is controlled during braking, which helps to ensure the braking effect.

[0123] The linear reciprocating drive 10 also includes an anti-rotation assembly, which includes a guide seat 15 fixedly mounted on the housing 11, a rolling body 16 axially slidably connected in the guide seat 15, the central axis of the rolling body 16 is fixedly connected to the lead screw 14, the central axis of the rolling body 16 is radial to the lead screw 14, there are multiple rolling bodies 16, and the multiple rolling bodies 16 are symmetrically arranged about the center of the lead screw 14, a guide groove 151 is provided in the guide seat 15, and when the lead screw 14 moves, the outer ring of the rolling body 16 can roll along the guide groove 151, and the rolling body 16 of this embodiment is a bearing. In this embodiment, the guide groove 151 cooperates with the rolling body 16, so that sliding friction can be avoided during the guiding process, thereby reducing the wear rate, especially in the case where the linear reciprocating drive 10 of this embodiment needs to withstand a large torque when there is a pressure build-up during operation, the existence of the rolling body 16 undoubtedly has an outstanding effect on reducing wear, and helps to ensure the output accuracy and service life of the linear reciprocating drive 10.

[0124] An adapter sleeve 17 is fixed on the lead screw 14, and the adapter sleeve 17 and the lead screw 14 are matched in a concave-convex manner. A radial hole is provided in the radial direction of the adapter sleeve 17. The central axis of the rolling body 16 passes through the radial hole on the adapter sleeve 17 and is fixedly connected to the lead screw 14. The central axis and the radial hole are clearance matched. A section of the central axis that is clearance matched with the radial hole is a smooth section, which facilitates the installation of the rolling body 16 and facilitates the transmission of the torque borne by the rolling body 16 to the adapter sleeve 17 through the smooth section.

[0125] In order to facilitate the addition of lubricating oil to the oil filling hole 131 on the ball screw nut 13 (the oil filling hole 131 is connected to the matching position of the lead screw 14 and the screw nut 13), an oil filling channel 152 is opened at the root position of the guide seat 15 close to the housing 11. The oil filling channel 152 can be an oil filling hole, an oil filling notch or an oil filling groove. The screw nut 13 is limited by a limiting structure on the electric motor that rotates synchronously with the screw nut 13. In this embodiment, the limiting structure is the limiting sleeve 18. The limiting sleeve 18 is processed with an oil passage 181 opened in the axial direction. The end surface of the limiting sleeve 18 opposite to the screw nut 13 is processed with an annular groove 182. The annular groove 182 connects the oil passage 181 and the oil filling hole. The end of the oil passage 181 away from the screw nut 13 can face the oil filling channel 152. The lubricating oil is extended from the oil adding channel 152 to one end of the oil passage 181, and then under the extrusion pressure, the lubricating oil passes through the oil passage 181 into the annular groove 182, and finally enters the filling hole 131 on the nut 13, thereby completing the addition of lubricating oil to the matching structure of the nut 13 and the lead screw 14.

[0126] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An intelligent operation system of a glue supply pump, used for controlling a parallel glue supply pump system, comprising a control module and a monitoring module, wherein the monitoring module is used for collecting the real-time operation frequency of all pump units in the parallel glue supply pump system, wherein all pump units include working pump units and standby pump units; characterized in that: The control module calculates the difference of the real-time operating frequency of the working pump unit. When the difference exceeds the set range, the control module adjusts the input parameters of the pump unit with too high or too low operating frequency until the real-time operating frequency difference is within the set range; The control module also includes an alternating operation adjustment module, which is used to control the pump units to take turns as the standby pump units within a set time when there are standby pump units in the parallel glue supply pump system.

2. The intelligent operation system of a glue supply pump according to claim 1, characterized in that: The control module calculates the required number of working pump units according to the total outlet flow rate requirement of the parallel glue supply pump system and the requirement that a single working pump unit is in the high efficiency zone.

3. The intelligent operation system of a glue supply pump according to claim 1, characterized in that: Each pump unit includes a linear reciprocating drive and a lower pump body. The linear reciprocating drive drives the input end of the lower pump body to reciprocate to realize continuous pumping of the rubber material. The monitoring module is also used to monitor the upper stroke speed and the lower stroke speed of the linear reciprocating drive. The control module issues a warning when the real-time upstroke speed and / or downstroke speed exceeds a preset value; alternatively, the control module calculates the up and down stroke speed difference based on the up and down stroke speeds, and issues a warning when the up and down stroke speed difference exceeds a set speed difference range.

4. The intelligent operation system of the glue supply pump according to claim 3, characterized in that: When the early warning prompt is issued, if the travel speed of only one end is higher than the preset range, the early warning prompts that the wearing parts at that end are damaged.

5. The intelligent operation system of a glue supply pump according to claim 1, characterized in that: The monitoring module is also used to monitor the outlet pressure of each pump unit. When the outlet pressure is always lower than the preset outlet pressure within a set time, the control module issues a leakage alarm and / or controls the parallel glue supply pump system to shut down.

6. The intelligent operation system of a glue supply pump according to claim 1, characterized in that: The monitoring module is also used to calculate the cumulative glue output according to the operating frequency of the working pump and the glue output of each reciprocating operation of the working pump.

7. The intelligent operation system of a glue supply pump according to claim 1, characterized in that: Each pump unit includes a linear reciprocating drive and a lower pump body. The linear reciprocating drive drives the input end of the lower pump body to move back and forth to realize continuous pumping of the rubber. Each pump unit has a corresponding brake. The control module is electrically connected to the brake. The control module is used to control the brake to brake at least one of the input end of the linear reciprocating drive, the output end of the linear reciprocating drive, and the input end of the lower pump body after the linear reciprocating drive has no output for more than a set time.

8. The intelligent operation system of the glue supply pump according to claim 7, characterized in that: The following conditions must be met when the brake is activated: Condition 1 is that the output of the pump unit is lower than the set value for a continuous set time or the motor speed of the pump unit is lower than the set value for a continuous set time; Condition 2 is that the outlet flow of the pump unit is lower than the set value for a continuous set time or the outlet pressure change rate of the pump unit is lower than the set value for a continuous set time.

9. A control method for controlling a parallel glue supply pump system, characterized in that: The steps include: S1. Real-time monitoring of the real-time operating frequency of all pump units in the parallel glue supply pump system; S2. Calculate the difference in real-time operating frequency between the pump units serving as working pumps, and adjust the pump unit with too high or too low operating frequency when the difference exceeds a set range, so that the operating frequencies of all working pumps tend to be consistent; S3. When there is a standby pump in the parallel glue supply pump system, all pump units take turns to serve as standby pump units.

10. A control method according to claim 9, characterized in that: According to the total outlet flow rate requirement of the parallel glue supply pump system and the requirement that a single working pump unit is in the high efficiency zone, the required number of working pump units is calculated.

11. A control method according to claim 9, characterized in that: For the pump body in the pump unit that realizes continuous feeding by reciprocating drive, the up and down stroke speeds of the reciprocating movement are monitored. When the single-end stroke speed exceeds the preset value or the speed difference between the two-end strokes exceeds the set range, an early warning prompt of damage to the wearing parts is issued.

12. A control method according to claim 9, characterized in that: The outlet pressure of each pump unit is monitored. When the outlet pressure is always lower than the preset outlet pressure within a set time, the control module issues a leakage alarm and / or controls the parallel glue supply pump system to shut down.

13. A control method according to claim 9, characterized in that: After the pump unit is changed from the tooling state to the holding state, the power input end or the power output end of the stopped pump unit is braked by the provided brake.

14. A control method according to claim 13, characterized in that: The following conditions must be met when the brake is activated: Condition 1 is that the output of the pump unit is lower than the set value for a continuous set time or the motor speed of the pump unit is lower than the set value for a continuous set time; Condition 2 is that the outlet flow of the pump unit is lower than the set value for a continuous set time or the outlet pressure change rate of the pump unit is lower than the set value for a continuous set time.

15. An application of an intelligent operation system for a glue supply pump, characterized in that: Used for using the intelligent operation system of the glue supply pump according to any one of claims 1 to 8 in a glue supply station.

16. The application of the intelligent operation system of the glue supply pump according to claim 15, characterized in that: The pump unit in the parallel glue supply pump system includes a linear reciprocating drive driven by a motor and a lower pump body. The linear reciprocating drive is a lead screw drive or a motor drives a gear rack.

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