A kind of single motor single pipe two-chamber syringe pump mechanismTechnical field
The invention belongs to field of mechanical technique, be specifically related to a kind of single-tube double-cavity syringe pump mechanism (single motor) and using method thereof.
Background technology
At present, on market, tradition its working method of syringe pump is intermittent.So-called intermittence refers to time syringe pump sucks medium, can lose the ability of pumping；And when pumping medium, the ability sucking medium can be lost.If need to work simultaneously, then need two common functions realizing continuing pumped (conveying) medium of pump cooperative alternative running.In order to keep the features such as the high accuracy of syringe pump, wide in range output pressure scope, get rid of simultaneously or greatly eliminate the defect of its intermittent work, hereby invent this single-tube double-cavity syringe pump mechanism (single motor).
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of single-tube double-cavity syringe pump mechanism (single motor) and using method thereof.
The technical solution adopted for the present invention to solve the technical problems is as follows:
A kind of single-tube double-cavity syringe pump mechanism, including single-tube double-cavity syringe pump, lead screw motor, clutch apparatus, induction installation and control device；Described clutch apparatus, including two electromagnetic clutch assemblies and a clutch-plate, electromagnetic clutch assembly is fixing by clutch-pedal support assembling, and assembles with lead screw motor fastening；Electromagnetic clutch assembly near lead screw motor side is provided centrally with a rotor, this rotor and the rotor assembly connection formation revolute pair of lead screw motor, will drive the rotor synchronous axial system in electromagnetic clutch assembly when rotor rotates；Clutch-plate is arranged on the centre of two electromagnetic clutchs；Described induction installation includes two optocoupler sensors, is installed on the diverse location of clutch-pedal support；The screw mandrel of single-tube double-cavity syringe pump runs through lead screw motor, two electromagnetic clutch assemblies and clutch-plate, and can arrive at the screw mandrel sensor being arranged on afterbody, thus triggering screw mandrel position signalling；One section, the centre of this screw mandrel is monolateral flat filament shape, and the straight line base inserting the sensor shielding plate in the middle of clutch-plate interlayer is mated with flat filament face so that clutch-plate constitutes revolute pair with screw mandrel, screw mandrel will be driven to do the rotary motion synchronized when clutch-plate wire winding rod axle rotates；Sensor shielding plate is in order to trigger rotating position signal；
Described clutch apparatus, including two electromagnetic clutch assemblies and a clutch-plate.Two electromagnetic clutch assemblies are controlled by the controller, by generation electromagnetic field and to adsorb clutch-plate in combination integral after the energising of any one electromagnetic clutch assembly.When clutch-plate adsorbs integral with the electromagnetic clutch assembly being provided with rotor, it is integrally formed with the rotor of lead screw motor indirectly, and rotates therewith under the driving of lead screw motor, rotates thus driving screw mandrel to follow lead screw motor together with injection shaft.When, after clutch-plate with the electromagnetic clutch assembly absorption of opposite side, it is indirectly integrally formed with clutch-pedal support and keeps geo-stationary, thus the rotary motion of screw mandrel and injection shaft can be stoped.
Described sensor shielding plate is semicircle, is fixedly installed in the interlayer of clutch-plate；Its radius is more than the radius of clutch-plate, and therefore its part protruded outside clutch-plate external diameter can block optocoupler sensor thus triggering signal.When lead screw motor rotates clutch-plate, sensor shielding plate concomitant rotation；The radial direction base of sensor shielding plate is separately positioned on the both sides of clutch-plate external diameter, becomes two signal trigger points of sensor, at a distance of 180 ° of angle relations；Corresponding signal, through optocoupler sensor, is namely triggered in its any one limit central, and this signal controlled device is used for two stop positions judging in steering procedure.
Described screw mandrel sensor, for sensing the position that screw mandrel is axially moveable；Under the effect of lead screw motor, screw mandrel axially moves, when the exposed end of screw mandrel triggers this optocoupler sensor, control device and utilize the linkage of clutch apparatus and lead screw motor, screw mandrel and injection shaft are rotated 180 °, drive screw mandrel to axially move toward rightabout again through lead screw motor afterwards.
Described single-tube double-cavity syringe pump includes pump housing axle sleeve, injection shaft, housing and sealing device, and has axle sleeve medium entrance end and axle sleeve media outlet end on pump housing axle sleeve；The lateral wall of injection shaft has the groove of two strips, and one end of two grooves is all closed, and the other end all opens and open end flushes with injection shaft two ends respectively；Injection shaft is arranged in pump housing axle sleeve, and one end of pump housing axle sleeve and sealing device are tightly connected so that an end face of injection shaft, pump housing axle sleeve medial wall and sealing device constitute side cavity；Another end face of injection shaft, pump housing axle sleeve medial wall and constitute another cavity with the inner bottom surface of cylindrical hole on housing, the inner circle of the cylindrical of injection shaft and pump housing axle sleeve closely cooperates, and is separated by two cavitys.Injection shaft can seesaw vertically in pump housing axle sleeve, thus changing the volume of two cavitys.
Described axle sleeve medium entrance end and axle sleeve media outlet end are arranged on the centre position of pump housing side wall of shaft sleeve, and axle sleeve medium entrance end and axle sleeve media outlet end are symmetrical arranged.Two groove location on described injection shaft are as the criterion symmetry with the center of injection shaft axis.Having through hole in the middle of described injection shaft, screw mandrel is closely coupled with injection shaft through hole medial wall after running through this through hole；It runs through sealing device beyond one end of injection shaft, and is tightly connected with sealing device.
Described housing is arranged on outside pump housing axle sleeve, and housing is provided with the entrance end corresponding with axle sleeve medium entrance end and axle sleeve media outlet end position；And the medium entrance end on housing can the variation of travel direction as required, concrete: medium import and export groove can be set in housing according to direction.The cylindrical hole inwall of housing seals with pump housing axle sleeve outer wall, and on housing, the inner bottom surface of cylindrical hole plays the effect sealing one end face of pump housing axle sleeve.
Be provided with seal ring assembly in described sealing device, this seal ring assembly and screw mandrel compact siro spinning technology, and sealing device with housing by the airtight assembly connection of securing member, play the effect of sealing one end face of pump housing axle sleeve.
Described pump housing axle sleeve and the material of injection shaft are pottery.Described housing and sealing device are metal material, it is preferred to metallic aluminium and steel.
A kind of using method of single-tube double-cavity syringe pump mechanism (single motor), specific as follows:
First the medium entrance end on housing and media outlet end are all tightly connected with external medium input equipment and medium output device.Control device by clutch apparatus, lead screw motor and induction installation collaborative work, syringe pump is placed on reset direction；So-called reset direction, is namely that the side medium cavity being made up of sealing device connects with the axle sleeve media outlet end groove through injection shaft side, and opposite side medium cavity connects with axle sleeve medium entrance end through the opposite side groove of injection shaft simultaneously；Two grooves of injection shaft are respectively just to axle sleeve medium entrance end and axle sleeve media outlet end.Then, controller pins the axial rotational freedom of screw mandrel by clutch apparatus, and pull screw mandrel and the axial lead screw motor direction of injection to move by lead screw motor, the side cavity volume being made up of injection shaft end face, pump housing axle sleeve medial wall and sealing device diminishes, and chamber in-vivo medium (has the mixture of air or air and medium) and pumps through groove time initial；Meanwhile, medium cavity (this dielectric cavity is constituted by another end face of injection shaft, pump housing axle sleeve medial wall and with the inner bottom surface of cylindrical hole on the housing) volume of opposite side becomes big, and the groove that medium is through this side is inhaled into cavity.When lead screw motor pulls injection shaft walking close to the end face of sealing device, the tail end of screw mandrel triggers screw mandrel sensor and diversion signal occurs；Immediately, control device by clutch apparatus, lead screw motor and induction installation collaborative work, make screw mandrel and injection shaft around axial rotation 180 °, injection shaft grooves on two sides position completes exchange, originally just the side groove of axle sleeve medium entrance end is become just to axle sleeve media outlet end, be filled with medium in the dielectric cavity now communicated with this groove and connect with axle sleeve media outlet end；Originally just the opposite side groove of axle sleeve media outlet end being become just to axle sleeve medium entrance end, the dielectric cavity communicated with this groove has emptied medium and has connected with axle sleeve medium entrance end.Then, controller pins the axial rotational freedom of screw mandrel again by clutch apparatus, by lead screw motor antiport, screw mandrel and injection shaft are pushed away lead screw motor direction, thus change the volume of injection shaft both sides cavity, while making side cavity continue to pump medium, opposite side cavity sucks medium, starts the stroke of accumulative injection shaft and screw mandrel with timed unit.When injection shaft pushed away from lead screw motor reach set stroke time, control device stop syringe pump pump action；Control device and implement go to action, by clutch apparatus, lead screw motor and induction installation collaborative work, again will injection
Pump is arranged on reset direction.So moving in circles, except having of short duration stopping when performing go to action, this single-tube double-cavity syringe pump mechanism is sustainable constantly pumps medium.
Beneficial effects of the present invention:
Present configuration is simple, and two slot openings on injection shaft are respectively at two different end faces of injection shaft, pull the injection shaft direction of motion different in conjunction with screw mandrel so that a dielectric cavity is while port of export injectable media, and another dielectric cavity sucks medium from entrance point.Move back and forth and exchange when turning to the corresponding relation of groove and import and export so that this syringe pump can keep the ability continuing one direction output medium.
The control device of the present invention and induction installation, can accurately control clutch apparatus and lead screw motor, is alternately performed go to action and the action of push-and-pull injection shaft and screw mandrel, it is achieved manipulation and the operation to this kind of syringe pump.
The pump housing axle sleeve of the present invention and the material of injection shaft are preferred with pottery, in particular for full-bodied medium, it is possible to high accuracy cooperation plays sealing function to isolate two dielectric cavity, and reach effect wear-resisting, that rotation resistance to sliding is little.
The pump housing axle sleeve of the present invention and injection shaft can also adopt other materials and encapsulating method, concrete: can be metal material and rubber seal technology, with suitable in media that mobility is strong, viscosity is low such as water, edible vegetable oil and gases.
Accompanying drawing explanation
Fig. 1 is the overall structure axonometric drawing of the present invention；
Fig. 2 is the overall structure top view of the present invention；
Fig. 3 is the overall structure side view of the present invention；
Fig. 4 is the overall structure rearview of the present invention；
Fig. 5 is the overall structure sectional view of the present invention
In figure, clutch-pedal support 1, screw mandrel sensor 2, electromagnetic clutch assembly I 3, clutch-plate 4, sensor shielding plate 5, rotation direction sensor 6, electromagnetic clutch assembly II 7, lead screw motor 8, screw mandrel 9, sealing device 10, seal ring assembly 11, housing 12, pump housing axle sleeve 13, injection shaft 14.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4 and Fig. 5, a kind of single-tube double-cavity syringe pump mechanism (single motor), including single-tube double-cavity syringe pump, lead screw motor, clutch apparatus, induction installation and control device；As shown in Figure 1 and Figure 5, clutch apparatus includes electromagnetic clutch assembly I 3, electromagnetic clutch assembly II 7 and a clutch-plate 4, electromagnetic clutch assembly I 3 and electromagnetic clutch assembly II 7 are fixing by clutch-pedal support 1 assembling, and assemble with lead screw motor 8 fastening；Electromagnetic clutch assembly II 7 near lead screw motor 8 side is provided centrally with a rotor, this rotor and the rotor assembly connection formation revolute pair of lead screw motor, will drive the rotor synchronous axial system in electromagnetic clutch assembly II 7 when rotor rotates；Clutch-plate 4 is arranged on the centre of electromagnetic clutch assembly I 3, electromagnetic clutch assembly II 7；Described induction installation includes two optocoupler sensors, i.e. screw mandrel sensor 2 and rotation direction sensor 6, it is installed on the diverse location of clutch-pedal support, concrete such as Fig. 1, shown in 4 and 5: screw mandrel sensor 2 is installed on the clutch-pedal support of Motionless electromagnetic clutch pack I 3, and rotation direction sensor 6 is arranged on the clutch-pedal support below sensor shielding plate 5；The screw mandrel 9 of single-tube double-cavity syringe pump sequentially passes through lead screw motor 8, electromagnetic clutch assembly II 7, clutch-plate 4 and electromagnetic clutch assembly I 3, and can arrive at the screw mandrel sensor 2 being arranged on afterbody, thus triggering screw mandrel position signalling；One section, the centre of this screw mandrel is monolateral flat filament shape, the straight line base inserting the sensor shielding plate 5 in the middle of clutch-plate 4 interlayer is mated with flat filament face, make clutch-plate 4 and screw mandrel 9 constitute revolute pair, when clutch-plate 4 wire winding rod rotates, screw mandrel will be driven to do the rotary motion synchronized；Sensor shielding plate 5 is in order to trigger rotating position signal；
As shown in Figure 1 and Figure 5, two electromagnetic clutch assemblies in described clutch apparatus are controlled by the controller, controller will maintain and only have the energising of electromagnetic clutch assembly, by generation electromagnetic field and to adsorb clutch-plate 4 in combination integral after the energising of any one electromagnetic clutch assembly.When clutch-plate 4 adsorbs integral with the electromagnetic clutch assembly II 7 being provided with rotor, it is integrally formed with the rotor of lead screw motor indirectly, and rotate therewith under the driving of lead screw motor, rotate thus driving screw mandrel to follow lead screw motor together with injection shaft 14.When, after clutch-plate 4 with electromagnetic clutch assembly I 3 absorption of opposite side, it is indirectly integrally formed with clutch-pedal support and keeps geo-stationary, thus screw mandrel and the rotary motion of injection shaft 14 can be stoped.
Described sensor shielding plate is semicircle, is fixedly installed in the interlayer of clutch-plate 4；Its radius is more than the radius of clutch-plate 4, and therefore its part protruded outside clutch-plate 4 external diameter can block optocoupler sensor thus triggering signal.When lead screw motor rotates clutch-plate 4, sensor shielding plate concomitant rotation；The radial direction base of sensor shielding plate is separately positioned on the both sides of clutch-plate 4 external diameter, becomes two signal trigger points of sensor, at a distance of 180 ° of angle relations；Corresponding signal, through optocoupler sensor, is namely triggered in its any one limit central, and this signal controlled device is used for two stop positions judging in steering procedure.
Described screw mandrel sensor 2, for sensing the position that screw mandrel is axially moveable；Under the effect of lead screw motor, screw mandrel axially moves, when the exposed end of screw mandrel triggers this optocoupler sensor, control device and utilize the linkage of clutch apparatus and lead screw motor, screw mandrel and injection shaft 14 are rotated 180 °, drive screw mandrel to axially move toward rightabout again through lead screw motor afterwards.
Described single-tube double-cavity syringe pump includes pump housing axle sleeve 13, injection shaft 14, housing 12 and sealing device 10, and has axle sleeve medium entrance end and axle sleeve media outlet end on pump housing axle sleeve 13；The lateral wall of injection shaft 14 has the groove of two strips, and one end of two grooves is all closed, and the other end all opens and open end flushes with injection shaft 14 two ends respectively；Injection shaft 14 is arranged in pump housing axle sleeve 13, and one end of pump housing axle sleeve 13 and sealing device are tightly connected so that an end face of injection shaft 14, pump housing axle sleeve 13 medial wall and sealing device 10 constitute side cavity；Another end face of injection shaft 14, pump housing axle sleeve 13 medial wall and constitute another cavity with the inner bottom surface of cylindrical hole on housing 12, the inner circle of the cylindrical of injection shaft 14 and pump housing axle sleeve 13 closely cooperates, and is separated by two cavitys.Injection shaft 14 can seesaw vertically in pump housing axle sleeve 13, thus changing the volume of two cavitys.
Described axle sleeve medium entrance end and axle sleeve media outlet end are arranged on the centre position of pump housing axle sleeve 13 sidewall, and axle sleeve medium entrance end and axle sleeve media outlet end are symmetrical arranged.Two groove location on described injection shaft 14 are as the criterion symmetry with the center of injection shaft 14 axis.Having through hole in the middle of described injection shaft 14, screw mandrel is closely coupled with injection shaft 14 through hole medial wall after running through this through hole；It runs through sealing device 10 beyond one end of injection shaft 14, and is tightly connected with sealing device 10.
It is outside that described housing 12 is arranged on pump housing axle sleeve 13, and housing 12 is provided with the entrance end corresponding with axle sleeve medium entrance end and axle sleeve media outlet end position；And the medium entrance end on housing 12 can the variation of travel direction as required, concrete: medium import and export groove can be set in housing 12 according to direction.The cylindrical hole inwall of housing 12 seals with pump housing axle sleeve 13 outer wall, and on housing 12, the inner bottom surface of cylindrical hole plays the effect sealing 13 1 end faces of pump housing axle sleeve.
It is provided with seal ring assembly 11 in described sealing device 10, this seal ring assembly 11 and screw mandrel compact siro spinning technology, and sealing device 10 and housing 12 are by the airtight assembly connection of securing member, play the effect sealing 13 1 end faces of pump housing axle sleeve.
Described pump housing axle sleeve 13 and the material of injection shaft 14 are pottery.Described housing 12 and sealing device 10 are metal material, it is preferred to metallic aluminium and steel.
A kind of using method of single-tube double-cavity syringe pump mechanism (single motor), specific as follows:
First the medium entrance end on housing 12 and media outlet end are all tightly connected with external medium input equipment and medium output device.Control device by clutch apparatus, lead screw motor and induction installation collaborative work, syringe pump is placed on reset direction；So-called reset direction, is namely that the side medium cavity being made up of sealing device 10 connects through the groove of certain side of injection shaft 14 with axle sleeve media outlet end, and opposite side medium cavity connects with axle sleeve medium entrance end through the opposite side groove of injection shaft 14 simultaneously；Two grooves of injection shaft 14 are respectively just to axle sleeve medium entrance end and axle sleeve media outlet end.Then, controller pins the axial rotational freedom of screw mandrel by clutch apparatus, and pull screw mandrel and injection shaft 14 to move to lead screw motor direction by lead screw motor, the side cavity volume being made up of injection shaft 14 end face, pump housing axle sleeve 13 medial wall and sealing device 10 diminishes, and chamber in-vivo medium (has the mixture of air or air and medium) and pumps through groove time initial；Meanwhile, medium cavity (this dielectric cavity is constituted by another end face of injection shaft 14, pump housing axle sleeve 13 medial wall and with the inner bottom surface of cylindrical hole on the housing 12) volume of opposite side becomes big, and the groove that medium is through this side is inhaled into cavity.When the end face that lead screw motor pulls injection shaft 14 to walk close to sealing device 10, the tail end of screw mandrel triggers screw mandrel sensor 2 and diversion signal occurs；Immediately, control device by clutch apparatus, lead screw motor and induction installation collaborative work, make screw mandrel 9 and injection shaft 14 around axial rotation 180 °, injection shaft 14 grooves on two sides position completes exchange, originally just the side groove of axle sleeve medium entrance end is become just to axle sleeve media outlet end, be filled with medium in the dielectric cavity now communicated with this groove and connect with axle sleeve media outlet end；Originally just the opposite side groove of axle sleeve media outlet end being become just to axle sleeve medium entrance end, the dielectric cavity communicated with this groove has emptied medium and has connected with axle sleeve medium entrance end.Then, controller pins the axial rotational freedom of screw mandrel again by clutch apparatus, by lead screw motor antiport, screw mandrel 9 and injection shaft 14 are pushed away lead screw motor direction, thus change the volume of injection shaft 14 both sides cavity, while making side cavity continue to pump medium, opposite side cavity sucks medium, starts the stroke of accumulative injection shaft 14 and screw mandrel 9 with timed unit.When injection shaft 14 pushed away from lead screw motor reach set stroke time, control device stop syringe pump pump action；Control device and implement go to action, by clutch apparatus, lead screw motor and induction installation collaborative work, again syringe pump is arranged on reset direction.So moving in circles, except having of short duration stopping when performing go to action, this single-tube double-cavity syringe pump mechanism is sustainable constantly pumps medium.