CN110979771B - Non-contact liquid filling device - Google Patents
Non-contact liquid filling device Download PDFInfo
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- CN110979771B CN110979771B CN201911342151.4A CN201911342151A CN110979771B CN 110979771 B CN110979771 B CN 110979771B CN 201911342151 A CN201911342151 A CN 201911342151A CN 110979771 B CN110979771 B CN 110979771B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
- B65B3/26—Methods or devices for controlling the quantity of the material fed or filled
- B65B3/30—Methods or devices for controlling the quantity of the material fed or filled by volumetric measurement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B57/00—Automatic control, checking, warning, or safety devices
Abstract
The invention discloses a non-contact liquid filling device, and belongs to the technical field of filling. The filling unit is used for filling liquid materials into the container; the detection and control unit is used for detecting the height of the liquid material in the filled container and controlling the starting and stopping of the filling unit; the detection and control unit comprises a measuring catheter and a pressure sensor; one end of the measuring conduit extends into the filled container, and the other end of the measuring conduit is connected with the pressure sensor; the pressure sensor detects the pressure change in the measuring conduit pipe, is in signal connection with the filling unit and controls the starting and stopping of the filling unit. When the liquid material is filled into the container, when the liquid level in the filled container rises to the pipe orifice of the extending end of the measuring conduit, the pressure in the measuring conduit is changed, and the pressure detector is triggered to control the filling action of the filling unit, so that the liquid level heights of the filled liquid material in all the containers are consistent, and the effect of accurately controlling the filling liquid level height is achieved.
Description
Technical Field
The invention belongs to the technical field of liquid filling, and particularly relates to a non-contact liquid filling device.
Background
On the streamlined production line of beverage industry and other industries, the packaging of liquid is mostly carried out by adopting a filling valve, the requirement on the quality of products in all aspects is higher and higher along with the market development, the precision requirement on the height of the filled liquid level is higher and higher in the liquid packaging process, and a plurality of users have requirements on the consistency of the height of the liquid level after liquid filling, which is a challenge to the traditional filling valve.
In the existing liquid filling procedures, most manufacturers adopt mechanical filling valves to fill liquid, and the filling device is widely favored due to low cost and convenient processing, but the mechanical filling valves have poor filling precision, difficult control of filling quantity, long valve closing time, easy occurrence of phenomena of large filling liquid level height deviation, waste of liquid materials and the like, and filled products are difficult to meet market demands;
some manufacturers also adopt a flow valve for filling, compared with a mechanical valve, the flow valve can accurately control the outflow of the filled liquid material and close the valve in time, the precision is far higher than that of the mechanical valve, but the device has high cost and only can accurately control the flow, but cannot accurately control the liquid level height in a filled container, for example, for glass bottles, ceramic containers and the like, because the volume and the shape of an inner cavity have inevitable errors in the manufacturing process, the liquid level heights presented in the containers by the same outflow of the liquid material are different, the requirements of the containers on the filling liquid level height cannot be met only by the flow valve, although a non-contact photoelectric liquid level detector can assist the valve body to control, the cost of the filling device is increased, and the non-transparent container cannot be used, the application range is small, and the high cost makes the wide popularization and use difficult.
Through retrieval, the Chinese patent publication number: CN 102923628A; the publication date is as follows: 13/2/2013; the liquid filling testing machine comprises a liquid suction module, a filling module, a liquid level tracking module and a servo control system; the piston rod end of a metering pump of the liquid suction module is connected with a group of ball screw nut mechanisms and can move up and down along a linear slide rail on one side under the drive of a servo motor; the filling module mainly comprises a filling head with the height capable of being adjusted up and down; the liquid level tracking module mainly comprises a filling bottle tray and a liquid level detection device, wherein the filling bottle tray is positioned below the filling head, the filling bottle tray is driven by a stepping motor through another group of screw nut mechanisms and can move up and down along a linear slide rail on the other side, and the liquid level detection device is positioned on the periphery of the filling bottle; the filling head is vertically opposite to the opening of the filling bottle; the servo control system mainly comprises a PLC controller and motor drivers, and each motor is connected with the respective motor driver. The liquid filling testing machine of this application controls the liquid level height of filling in-process through liquid level tracking module, though can reach the requirement to filling liquid level height uniformity basically, nevertheless uses and has the limitation, to the filling container and the non-transparent container of dysmorphism, the photoelectric sensor who is used for detecting the liquid level among the liquid level detection device detects the accuracy and will receive the influence greatly, is difficult to the accurate detection, and the device structure of this application is complicated, and is with high costs.
Disclosure of Invention
1. Problems to be solved
The invention provides a non-contact liquid filling device, aiming at the problem that the liquid level height cannot be accurately controlled by the existing filling device, when liquid materials are filled into a container, after the liquid level in the filled container rises to the pipe orifice of a measuring pipe extending end, the change of internal pressure is caused, and a pressure detector is triggered, so that the filling action of a filling unit is controlled, the liquid level heights of the liquid materials filled into all the containers are ensured to be consistent, and the effect of accurately controlling the filling liquid level height is achieved.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A non-contact liquid filling device comprises a liquid filling device,
a filling unit for filling the container with a liquid material;
the detection and control unit is used for detecting the height of the liquid material in the filled container and controlling the starting and stopping of the filling unit;
the detection and control unit comprises a measuring catheter and a pressure sensor;
one end of the measuring conduit extends into the filled container, and the other end of the measuring conduit is connected with the pressure sensor;
the pressure sensor detects the pressure change in the measuring conduit pipe, is in signal connection with the filling unit and controls the starting and stopping of the filling unit.
The measuring conduit is a long and thin pipeline, one part of the measuring conduit is positioned outside the container, the other part of the measuring conduit is positioned in the container, the measuring conduit positioned outside the container is connected with a pressure sensor, the pressure sensor can detect the pressure change in the measuring conduit, the measuring conduit penetrates through the bottle opening of the container and extends into the container, when the filling process is started, liquid materials flow through the filling unit, enter the container through the bottle opening of the container and fall to the bottom in the container, the liquid level starts to rise, no liquid exists at the pipe opening of the measuring conduit positioned in the container when the filling is started, and the pressure in the measuring conduit is normal pressure P at the moment0Pressure sensor can not detect pressure signal, along with going on of filling process, liquid level constantly rises in the container, when the liquid level rises to not crossing the measuring tube mouth of pipe, measuring tube internal pressure changes, because pressure sensor is connected with measuring tube and is surveyed intraductal pressure this moment, pressure sensor detects the change of pressure, send out the signal control filling unit and stop the filling, reached the control to the liquid level height promptly, in whole filling assembly line, only need to control the end mouth of pipe highly uniform that stretches into of measuring tube, and highly uniform when being filled the container filling, when filling the same liquid material, the liquid level reachs the same height at every turn, all can trigger pressure sensingThe device sends a signal to control the filling unit to stop, and the effect that the consistency of the filling height can be ensured in the whole filling assembly line is achieved.
The device further comprises a three-way valve, wherein two flow passage openings of the three-way valve are connected into the measuring conduit, and the other flow passage opening is communicated with the liquid extracting pipe;
the liquid extracting pipe is used for extracting liquid materials.
The three-way valve is arranged on the measuring conduit outside the container, the three-way valve is divided into three paths, two paths are communicated with the measuring conduit, one path is communicated with the liquid pumping pipe, when liquid materials are filled, the two paths communicated with the measuring conduit are communicated by the three-way valve, so that the pressure sensor can effectively detect pressure change in the measuring conduit, and after filling is stopped, the three-way valve is switched, so that the part of the measuring conduit extending into the container opening is communicated with the liquid pumping pipe to perform liquid pumping operation.
Further, the height of the end face of one end of the measuring conduit extending into the filled container is consistent with the set height of the filling liquid level.
Through the setting, after liquid is pumped through the liquid pumping pipe, the final liquid level in the container stays at the height of the end face of the extending end of the measuring conduit, namely the set height of the filling liquid level, so that the liquid level height of each filling is ensured to be consistent.
Further, the filling unit comprises:
the liquid conveying pipe is used for conveying liquid materials;
the control valve is arranged on the infusion tube and is in signal connection with the pressure sensor;
the infusion port is a vertically arranged pipeline, the side wall of the infusion port is communicated with the end part of the discharge of the infusion tube, and the bottom end of the infusion port is used for discharging liquid materials.
Transfer line and liquid material head tank intercommunication, transmit liquid material to the container, the control valve is located the transmission and the stop of control liquid material on the transfer line, wherein the control valve receives the control of pressure sensor signal, when pressure sensor sends stop signal, in time close, cut off the transmission of liquid material, the vertical setting of infusion mouth, lateral wall and transfer line intercommunication, liquid material flows through behind transfer line to the infusion mouth, become decurrent trend and fall down, finally discharge from the bottom of infusion mouth, infusion mouth bottom stretches into the container mouth in this scheme, prevent to splash to the container outside when liquid material falls, nevertheless need not to stretch into the container mouth too many, in order to avoid contacting with the liquid material liquid level when the filling is accomplished.
Furthermore, one end of the measuring conduit passes through the infusion port pipeline and then extends into the filled container.
The partial measurement pipe and the filling unit assembly are integrated, the partial measurement pipe penetrates through the infusion port, the infusion port is a vertically arranged pipeline, the measurement pipe can penetrate through the hollow pipeline part of the infusion port, the measurement pipe stretches into the container after stretching out of the infusion port, and accordingly the measurement pipe is a thin pipe, the diameter of the measurement pipe is smaller than the diameter of the infusion port, meanwhile, liquid materials transmitted by an infusion pipe flow through the infusion port and the spare part between the measurement pipes for filling after entering the infusion port, and the measurement pipe and the liquid materials are input without mutual influence.
Furthermore, an anti-splash stop block is arranged on the outer side of the end part of one end of the measuring conduit extending into the filled container.
The anti-splashing stop block is circumferentially arranged on the bulge of the outer side of the end part of the extension end of the measuring conduit, and is arranged in a manner of diverging and falling into the container under the action of the anti-splashing stop block, so that the impact of the liquid material on the liquid surface under the infusion port is reduced, thereby reducing the influence of the impact on the air pressure of the pipe orifice of the extension end of the measuring conduit, preventing the liquid material which falls to impact the liquid surface from splashing to flow into the measuring conduit to influence the detection of the pressure detector, ensuring the detection accuracy of the pressure detector, simultaneously dispersedly falling the liquid material to reduce the impact degree of the falling liquid material on the liquid surface, preventing the liquid material from splashing to the outside of the filling unit and the container, and ensuring the filling environment.
Further, the pressure sensor is a differential pressure sensor.
A differential pressure sensor detects the mouth and connects on measuring pipe, another detects the mouth and is connected with external environment, when the filling begins, measuring pipe is the same with external environment pressure, no pressure variation between two detection mouths, after filling liquid reachs appointed liquid level, cause the pressure variation in the measuring pipe, thereby make differential pressure sensor's two detection mouths produce the pressure differential change, the pressure differential reaches the differential pressure sensor setting value and triggers differential pressure sensor promptly, compare in other types of pressure sensor, differential pressure sensor is more applicable to the operational environment of this device, and detect more accurately, the response is more timely, help improving the accuracy of liquid level height control.
Further, a purging device is included and is in communication with the measurement conduit.
The purging device is an air source, the air source is communicated with the measuring conduit, the air source can be started for a short time before filling is started, and air is blown into the measuring conduit through the air source so as to ensure that the measuring conduit is in a smooth state, prevent residual liquid materials from blocking the orifice of the measuring conduit and ensure that the detection of the pressure sensor is not influenced.
3. Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
(1) when the non-contact liquid filling device fills liquid materials into the container, after the liquid level in the filled container rises to the pipe orifice of the measuring conduit extending into the end, the change of the internal pressure is caused, and the pressure detector is triggered to control the filling action of the filling unit, so that the liquid level heights of the liquid materials filled in all the containers are ensured to be consistent, and the effect of accurately controlling the filling liquid level height is achieved;
(2) the non-contact liquid filling device can completely ensure the consistency of the liquid level height of filling when the same liquid material is filled on a filling production line no matter how the shape and the volume error of the inner part of the container change, and the relative height of the measuring conduit and the container is a determinable value, so as to meet the requirement of a user on the consistency of the liquid level height;
(3) according to the non-contact liquid filling device, in the filling process, the filling unit inputs liquid materials at the opening of the container without contacting with the liquid materials in the container, only one end of the measuring conduit in the detection unit is arranged in the container, and during detection, pressure change can be detected only if the liquid materials in the container slightly pass through the opening of the measuring conduit, so that the filling unit is controlled to stop, too many parts are not required to contact with the liquid materials in the container, the situation that the liquid level height is influenced by the liquid taken out by the filling device when the container is removed after filling is finished is avoided, the filling valve is not contacted with the filled container in the whole filling process, non-contact filling is achieved, and the maintenance cost of the filling device is reduced;
(4) according to the non-contact liquid filling device, the extending end of the measuring conduit can be respectively communicated between the pressure sensor and the liquid pumping pipe through the three-way valve, the timely effectiveness of measurement is guaranteed when the liquid level is detected, the pipe orifice of the measuring conduit is communicated with the liquid pumping pipe to pump liquid after the measurement is finished, the consistency of the liquid level height is further guaranteed, and meanwhile, the liquid pumping amount of the liquid pumping pipe is very small each time under the timely control of the detection and control unit on the filling unit, so that the loss and the recovery cost of liquid materials are lower than those of the traditional filling procedure;
(5) according to the non-contact liquid filling device, the control valve can timely respond to the signal of the pressure sensor, the transmission of liquid materials can be timely cut off after the liquid materials are filled in place, the flow direction of the liquid materials is limited to be a vertical flow direction through the vertically arranged liquid conveying port, the liquid materials are vertically and downwards injected into a container, the splashing of the liquid materials in the filling process is reduced, and the filling effect is further ensured;
(6) according to the non-contact liquid filling device, after part of the measuring guide pipe and the filling unit assembly are integrated, the extending end of the measuring guide pipe extends out of the infusion port, so that the measuring guide pipe is protected, the occupied volume of the device extending into the container port is reduced, and the device is suitable for filling containers with various sizes and calibers better;
(7) according to the non-contact liquid filling device, the anti-splashing stop block is used for reducing the influence of impact on the air pressure at the pipe orifice at the extending end of the measuring guide pipe, preventing splashing liquid materials generated by the falling liquid materials impacting the liquid level from flowing into the measuring guide pipe to influence the detection of the pressure detector, ensuring the detection accuracy of the pressure detector, dispersing and dropping the falling liquid materials to reduce the impact degree of the falling liquid materials on the liquid level, preventing the liquid materials from splashing to the outside of the filling unit and the container, and ensuring the filling environment;
(8) according to the non-contact liquid filling device, the differential pressure sensor is more suitable for the working environment of the device, the detection is more accurate, the response is more timely, and the accuracy of liquid level height control is improved;
(9) the invention has simple structure, reasonable design and easy manufacture.
Drawings
FIG. 1 is a schematic structural view of a non-contact liquid filling apparatus according to the present invention;
FIG. 2 is a schematic view of the structure of a non-contact liquid-filling apparatus according to embodiment 8;
FIG. 3 is a schematic illustration of the filling process of the present invention;
FIG. 4 is a schematic illustration of the filling process of the present invention;
FIG. 5 is an enlarged view of A in FIG. 4;
FIG. 6 is a schematic view of a filling process variation according to the present invention;
fig. 7 is a schematic diagram of a filling process variation of the present invention.
In the figure:
1. a filling unit; 10. a transfusion tube; 11. a control valve; 12. an infusion port;
2. a detection and control unit; 20. a measurement catheter; 200. a splash-proof stop block; 21. a pressure sensor;
3. a three-way valve; 30. a liquid pumping pipe;
4. and (4) a purging device.
Detailed Description
The invention is further described with reference to specific embodiments and the accompanying drawings.
Example 1
As shown in fig. 1, the non-contact liquid filling apparatus of the present embodiment includes,
a filling unit 1 for filling a container with a liquid material;
the detection and control unit 2 is used for detecting the height of the liquid material in the filled container and controlling the starting and stopping of the filling unit 1;
the monitoring unit 2 comprises a measuring catheter 20 and a pressure sensor 21;
one end of the measuring conduit 20 extends into the filled container, and the other end is connected with a pressure sensor 21;
the pressure sensor 21 detects the pressure change in the measuring pipe 20 and is in signal connection with the filling unit 1 to control the start and stop of the filling unit 1.
The filling device in the prior art cannot effectively control the liquid level height to be consistent in the same production line, because the conventional mechanical valve and flow valve can only control the volume of the liquid material filled in each container to be consistent in volume except for the defects of the filling valve, and because the internal shape or volume of the filled containers has inevitable errors during the forming process, even though the containers of the same type are filled with the liquid material with the same volume, the liquid level height is different, the condition is more obvious in the containers made of glass and ceramics, and the requirement of users on the uniformity of the packaging liquid level height cannot be met.
To this, this embodiment provides a non-contact liquid filling device, through filling unit 1 to filling liquid material in the container, examine the start-stop that accuse unit 2 is used for detecting liquid level height and control filling unit 1, wherein the detection of liquid level height is through following realization:
the measuring conduit 20 is a slender pipeline, a part of the slender pipeline is positioned outside the container, a part of the slender pipeline is positioned in the container, the measuring conduit 20 positioned outside the container is connected with a pressure sensor 21, the pressure sensor 21 can detect the pressure change in the measuring conduit 20, the measuring conduit 20 penetrates through the bottle opening of the container and extends into the container, when the filling process is started, liquid materials flow through the filling unit 1, enter the container through the bottle opening of the container, fall to the bottom in the container, the liquid level begins to rise, the pipe opening of the measuring conduit 20 positioned in the container is free of liquid when the filling is started, and the pressure in the measuring conduit 20 is normal pressure P at the moment0The pressure sensor 21 cannot detect the pressure change signal, and the liquid level in the container continuously rises along with the filling process, as shown in fig. 3, when the liquid level rises to the position of submerging the orifice of the measuring conduit 20, the pressure in the measuring conduit 20 changes, at this time, because the pressure sensor 21 always measures the pressure in the conduit, the pressure sensor 21 detects the pressureWhen the pressure changes, the signal is sent to control the filling unit 1 to stop filling, namely, the control on the height of the liquid level is achieved, in the whole filling assembly line, only the height of the pipe orifice of the stretching end of the measuring conduit 20 is required to be controlled to be consistent, and the height of the filled container is consistent, when the same liquid material is filled, the liquid level reaches the same height at each time, the pressure sensor 21 is triggered to enable the signal sending control filling unit 1 to stop, and the effect that the whole filling assembly line can guarantee the consistency of the filling height is achieved.
When the liquid level of the liquid material is higher than the height of the pipe orifice of the extending end of the measuring pipe 20, the liquid material under the action of atmospheric pressure will make part of the liquid material enter the pipe orifice of the measuring pipe 20, a small liquid column with a certain height is formed in the measuring pipe 20, at this time, the height difference Δ H exists between the height of the liquid material in the container and the liquid material in the measuring pipe 20, as shown in fig. 4 and 5, at this time, the pressure change Δ P ═ ρ ═ in the measuring pipe 20Liquid materialG.Δ H, where ρLiquid materialThe density of the filled liquid material, g is a gravity constant, the pressure change is detected by the pressure sensor 21, then the pressure sensor 21 sends a signal to control the filling unit 1 to stop in time, filling is completed, and similarly, the filled liquid material is the same liquid material on the same filling production line, the density is the same, the height of the measuring conduit 20 and the height of the container are both determined values, after the pressure change parameter delta P of the trigger signal of the pressure sensor 21 is set, as long as the liquid level reaches a fixed height, the pressure change in the measuring conduit 20 is caused, so that the trigger condition is met, the pressure sensor 21 is triggered, filling is stopped at the fixed height, and the influence of the internal shape and the volume error of the container is avoided.
In the non-contact liquid filling device of the embodiment, in the filling process, the filling unit 1 inputs liquid materials at the opening of the container without contacting with the liquid materials in the container, only one end of the measuring conduit 20 in the detection unit 2 is arranged in the container, and during the detection, the pressure change can be detected only if the liquid materials in the container slightly exceed the opening of the measuring conduit 20, so that the filling unit 1 is controlled to stop, and too many parts are not required to contact with the liquid materials in the container, thereby avoiding the situation that the liquid is taken out by the filling device to influence the liquid level height when the container is removed after the filling is finished, the filling valve is not contacted with the filled container in the whole filling process, achieving non-contact filling, reducing the maintenance cost of the filling device, and through the filling device of the embodiment, no matter how the shape and volume error of the inside of the container change, because the relative height of the measuring conduit 20 and the container is a determinable value, therefore, when the same liquid material is filled in one filling production line, the filling liquid level can be completely ensured to be consistent, so that the user requirements can be met.
Example 2
As shown in fig. 1, the non-contact liquid filling apparatus of this embodiment is further improved based on embodiment 1, and further includes a three-way valve 3, two of the flow ports of the three-way valve 3 are connected to the measuring conduit 20, and the other flow port is communicated with the liquid extracting tube 30;
the liquid extracting pipe 30 is used for extracting liquid materials.
The three-way valve 3 of this embodiment is disposed on the measuring conduit 20 outside the container, the three-way valve 3 is divided into three paths, two paths communicate with the measuring conduit 20, and one path communicates with the liquid pumping tube 30, when the liquid material is filled, the three-way valve 3 makes the two paths communicating with the measuring conduit 20 communicate with each other, so that the pressure sensor 21 can effectively detect the pressure change in the measuring conduit 20, and after the filling is stopped, the three-way valve 3 is switched, so that the portion of the measuring conduit 20 extending into the container opening communicates with the liquid pumping tube 30, and the liquid pumping operation is performed.
During filling, when the liquid level in the container is lower than a part of the pipe orifice of the extending end of the measuring pipe 20, pressure is generated in the measuring pipe 20 to trigger the pressure sensor 21, then a signal is sent to stop transmission of the filling unit 1, and after the transmission is stopped, the remaining liquid material at the liquid outlet of the filling unit 1 continuously falls into the container along with gravity, although the amount of the liquid material is not large, the influence on the final liquid level height is not large under general conditions, and a small-volume container may cause obvious change, therefore, the present embodiment is provided with the structure of the three-way valve 3 and the liquid pumping pipe 30, during filling, two ends of the measuring pipe 20 are communicated when the three-way valve 3 is used for normally measuring pressure change, after the filling unit 1 is stopped, the three-way valve is switched to connect the liquid pumping pipe 30 with the extending end of the measuring pipe 20, the end of the liquid pumping pipe 30 is connected with a liquid pumping mechanism, such as a water pump, and the like, so as to perform liquid pumping operation, it all can be taken out not to have the measuring tube 20 to stretch into the orificial liquid material of end, descend to orificial horizontal plane department until the liquid level, liquid material can't continue to extract by liquid suction pipe 30, therefore, the uniformity of each filling liquid level height has further been ensured, the influence of error to liquid level height has been avoided, because the timeliness of pressure detection in this embodiment, filling unit 1 is closed to all can triggering signal after invariable liquid level to every filling, consequently, the unnecessary liquid material volume that need be by the drawing is very little, be different from the big drawing liquid volume of drawing liquid process in the traditional filling procedure, this embodiment is to the loss of liquid material, the recovery cost all is less than traditional filling procedure.
Example 3
The non-contact liquid filling apparatus of this embodiment is further improved based on embodiments 1 and 2, and the height of the end surface of the measuring tube 20 extending into the filled container is consistent with the set height of the filling liquid level.
By this setting, after the liquid is pumped through the liquid pumping tube 30, the final liquid level in the container stays at the height of the end surface of the extending end of the measuring tube 20, i.e. the set height of the filling liquid level, thereby ensuring that the liquid level height of each filling is consistent.
Example 4
As shown in fig. 1, the non-contact liquid filling apparatus of the present embodiment is further improved on the basis of embodiments 1 to 3, and the filling unit 1 includes:
a liquid transport tube 10 for transporting liquid materials;
a control valve 11 provided on the infusion tube 10 and signal-connected to the pressure sensor 21;
and the infusion port 12 is a vertically arranged pipeline, the side wall of the infusion port is communicated with the end part of the discharge of the infusion tube 10, and the bottom end of the infusion port is used for discharging liquid materials.
In this embodiment, transfer line 10 and liquid material head tank intercommunication, with liquid material to container transmission, control valve 11 locates the transmission and the stop of control liquid material on transfer line 10, wherein control valve 11 receives the control of pressure sensor 21 signal, when pressure sensor 21 sends stop signal, in time close, cut off the transmission of liquid material, infusion mouth 12 is vertical to be set up, lateral wall and transfer line 10 intercommunication, liquid material flows through behind transfer line 10 to infusion mouth 12, fall into decurrent trend, finally discharge from the bottom of infusion mouth 12, infusion mouth 12 bottom stretches into the container mouth in this embodiment, splash to the container outside when preventing liquid material from falling down, but need not to stretch into the container mouth too much, in order to avoid contacting with the liquid material liquid level when the filling is accomplished.
The control valve 11 of the present embodiment includes, but is not limited to, a valve body that can be opened and closed by a signal, such as an electromagnetic control valve, a pneumatic control valve, a hydraulic control valve, a mechanical control valve, and the like.
This embodiment can in time respond to pressure sensor 21's signal through control valve 11, can in time cut off the transmission of liquid material after the filling targets in place, and infusion mouth 12 through vertical setting defines the flow direction of liquid material for vertical flow direction, and during vertical injection container downwards, reduce splashing of filling in-process liquid material, further ensure the filling effect.
Example 5
As shown in fig. 1, the non-contact liquid filling apparatus of this embodiment is further improved based on embodiments 1 to 4, and one end of the measurement conduit 20 passes through the pipeline of the infusion port 12 and then extends into the container to be filled.
This embodiment is as an organic whole with part measuring catheter 20 and filling unit 1 assembly, with part measuring catheter 20 run through infusion mouth 12 and set up, because infusion mouth 12 is the pipeline of vertical setting, measuring catheter 20 can run through the hollow pipeline part of infusion mouth 12, stretch into the container after stretching out from infusion mouth 12, it is corresponding, measuring catheter 20 originally is the tubule, its diameter is less than infusion mouth 12 pipe diameter, meanwhile, the liquid material of transfer line 10 transmission gets into behind the infusion mouth 12 from infusion mouth 12 and measures the vacant department between catheter 20 and flow through and carry out the filling, measuring catheter 29 and liquid material input are each other not influenced.
Because the diameter of the container opening of the filled container is limited, the infusion opening 12 and the measuring conduit 20 separately extend into the container opening to occupy more space, some small-mouth containers are not convenient to extend into, and the measuring conduit 20 is a thin tube, the extending end of the external measuring conduit 20 has the probability of touching the container opening when the small-mouth container is filled, and the measuring conduit 20 is easy to damage.
The cooperation structure of infusion mouth 12 and measuring catheter 20 is passed through to this embodiment for the infusion is gone on in, measurement, the all can assembly of three process of drawing liquid and infusion mouth 12, has practiced thrift the space occupancy greatly, reduces equipment cost, makes this device have bigger filling application scope.
Example 6
As shown in fig. 1, the non-contact liquid filling apparatus of the present embodiment is further improved on the basis of embodiments 1 to 5, and a splash-proof block 200 is disposed outside an end portion of the measuring tube 20 extending into the filled container.
The anti-splash baffle 200 of this embodiment locates the arch that measuring tube 20 stretched into the end outside for circumference, through anti-splash baffle 200, the liquid material that stays through transfusion mouth 12, under the effect of bellied anti-splash baffle 200, fall into the container in being the formula of dispersing, reduce liquid material to the impact of transfusion mouth 12 under the liquid level, therefore, the impact has been reduced and has been stretched into the influence of end mouth of pipe department atmospheric pressure to measuring tube 20, the liquid material that splashes that also prevents that liquid material that falls to strike liquid level production gushes into measuring tube 20 and influences the detection of pressure detector 21, ensure the accuracy that pressure detector 21 detected, and simultaneously, it reduces its impact degree to the liquid level to drop liquid material dispersion to drop, prevent that liquid material from splashing outside filling unit 1 and the container, ensure the filling environment.
Example 7
As shown in fig. 1, the non-contact liquid filling apparatus of the present embodiment is further improved based on embodiments 1 to 6, and the pressure sensor 21 is a differential pressure sensor.
Differential pressure sensor is one of current pressure sensor 21, a differential pressure sensor of this embodiment detects the mouth and connects on measuring pipe 20, another detects the mouth and is connected with external environment, when the filling begins, measuring pipe 20 is the same with external environment pressure, there is not pressure difference between two detection mouths, after filling liquid reachs appointed liquid level, cause the pressure variation in measuring pipe 20, thereby make pressure difference have been produced between two detection mouths of differential pressure sensor, pressure difference reaches the differential pressure sensor setting value and triggers differential pressure sensor promptly, compare in other types of pressure sensor, differential pressure sensor is more applicable to the operational environment of this device, and detect more accurately, the response is more timely, help improving liquid level height control's accuracy.
Example 8
As shown in fig. 2, the non-contact liquid filling apparatus of the present embodiment is further improved based on embodiments 1 to 7, and further includes a purging device 4, which is communicated with the measuring conduit 20.
The purging device 4 of this embodiment is an air supply, and this embodiment sets up air supply and measuring duct 20 intercommunication, before the filling begins, can short time start the air supply, blows to measuring duct 20 through the air supply to ensure that measuring duct 20 is unobstructed state, prevent to have remaining liquid material to block up the measuring duct 20 mouth of pipe and ensure that pressure sensor 21's detection is not influenced.
Example 9
As shown in fig. 6 and 7, the method for performing in-line filling by using the non-contact liquid filling apparatus of the present embodiment includes the following steps:
firstly, transporting a container to be filled to the lower part of an infusion port 12, and enabling the container port to be opposite to the infusion port 12;
secondly, lifting the container to be filled to ensure that the end part of the extending end of the measuring conduit 20 and the bottom of the infusion port 12 extend into the container port, and lifting the high filling container until the pipe port surface of the extending end of the measuring conduit 20 is consistent with the specified liquid level to be filled;
thirdly, opening the control valve 11 to start filling, and connecting the two parts of measuring conduits 20 at the three-way valve 3;
fourthly, after the liquid level rises to a position that the liquid level is submerged in the measuring conduit 20 and extends into the port surface, pressure is generated in the measuring conduit 20, the pressure sensor 21 detects pressure change and is triggered, a signal is sent out to close the control valve 11, and liquid material filling is stopped;
fifthly, switching the three-way valve 3 to connect the extending end of the measuring conduit 20 with the liquid extracting pipe 30, starting liquid extraction by the liquid extracting pipe 30, and extracting the liquid material which extends into the port surface of the end through the measuring conduit 20;
sixthly, lowering and transporting the container away;
and seventhly, repeating the steps from one step to six steps for the next container to be filled.
Further, after the sixth step, the purging device 4 is started to purge the measurement conduit 20 once, and then the seventh step is performed.
As shown in fig. 6 and 7, the sequence of the serial numbers (r) to (r) in the figure is sequentially according to the sequence of the serial numbers (r) to (r) in the figure, which is a schematic flow diagram of the assembly line filling method of this embodiment, the assembly line filling method of this embodiment has simple process and short time consumption, and can effectively and accurately complete the filling of a container with a consistent liquid level, the consumption of liquid material in each filling is extremely low, and the requirement of liquid level consistency can be basically met by one filling, the liquid pumping amount in the liquid pumping process is very small, compared with the conventional filling, too much liquid material cannot be consumed in too much time, the cost is low, the efficiency is high, and the accuracy is suitable for being applied by general manufacturers.
The examples described herein are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall within the protection scope of the present invention.
Claims (6)
1. A non-contact liquid filling device comprises a liquid filling device,
a filling unit (1) for filling a container with a liquid material;
the detection and control unit (2) is used for detecting the height of the liquid material in the filled container and controlling the starting and stopping of the filling unit (1);
the method is characterized in that:
the detection and control unit (2) comprises a measuring catheter (20) and a pressure sensor (21);
one end of the measuring conduit (20) extends into the filled container, and the other end of the measuring conduit is connected with the pressure sensor (21);
the pressure sensor (21) detects the pressure change in the measuring conduit (20), is in signal connection with the filling unit (1), and controls the starting and stopping of the filling unit (1);
the outer side of the end part of one end of the measuring conduit (20) extending into the filled container is provided with a splash-proof stop block (200); the splash-proof stop block (200) is a protrusion which is circumferentially arranged on the outer side of the end part of the extending end of the measuring conduit (20);
also comprises a purging device (4) communicated with the measuring conduit (20); the purging device (4) is an air source;
when the filling process is started, liquid materials flow through the filling unit (1), enter the container through the container opening, fall to the bottom in the container, the liquid level starts to rise, the pipe orifice of the measuring pipe (20) arranged in the container is in a state that no liquid exists when the filling is started, and the pressure in the measuring pipe (20) is normal pressure P at the moment0The pressure sensor (21) can not detect the signal of pressure change, along with the going on of filling process, the liquid level constantly rises in the container, when the liquid level rises to the mouth of pipe that has not crossed measuring duct (20), pressure change appears in measuring duct (20), because pressure sensor (21) is measuring intraductal pressure all the time this moment, pressure sensor (21) detect the change of pressure, send signal control filling unit (1) and stop the filling, reached the control to the liquid level height promptly.
2. A liquid filling apparatus according to claim 1, wherein: the device also comprises a three-way valve (3), wherein two flow passage openings of the three-way valve (3) are connected into the measuring conduit (20), and the other flow passage opening is communicated with the liquid extracting pipe (30);
the liquid extracting pipe (30) is used for extracting liquid materials.
3. A liquid filling apparatus according to claim 2, wherein: the height of the end face of one end of the measuring conduit (20) extending into the filled container is consistent with the set height of the filling liquid level.
4. A liquid filling apparatus according to claim 1, wherein: the filling unit (1) comprises:
a liquid transport tube (10) for transporting liquid material;
a control valve (11) which is arranged on the infusion tube (10) and is in signal connection with the pressure sensor (21);
the infusion port (12) is a vertically arranged pipeline, the side wall of the infusion port is communicated with the end part of the discharge of the infusion tube (10), and the bottom end of the infusion port is used for discharging liquid materials.
5. A liquid filling apparatus according to claim 4, wherein: one end of the measuring conduit (20) passes through the pipeline of the infusion port (12) and then extends into the filled container.
6. A liquid filling apparatus according to claim 1, wherein: the pressure sensor (21) is a differential pressure sensor.
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| CN201911342151.4A CN110979771B (en) | 2019-12-24 | 2019-12-24 | Non-contact liquid filling device |
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| CN111561655B (en) * | 2020-05-27 | 2021-08-06 | 佛山市勇越气体有限公司 | Small-size high concentration liquid oxygen ration device |
| CN112964678B (en) * | 2021-01-29 | 2022-12-20 | 苏州爱力想电子科技有限公司 | Peritoneal dialysis waste liquid drainage detection device |
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| CN201980980U (en) * | 2010-12-22 | 2011-09-21 | 广东轻工机械二厂有限公司 | Beer filling valve |
| DE102011106832A1 (en) * | 2011-07-06 | 2013-01-10 | Krones Aktiengesellschaft | Method for determining the integrity and tightness of containers in filling plants |
| DE102011056370A1 (en) * | 2011-12-13 | 2013-06-13 | Krones Ag | Filler for filling containers |
| CN204588671U (en) * | 2015-05-11 | 2015-08-26 | 江苏新美星包装机械股份有限公司 | A kind of non-contact liquid filling apparatus |
| CN105645336A (en) * | 2016-03-02 | 2016-06-08 | 江苏新美星包装机械股份有限公司 | Non-contact type filling machine |
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