CN201425008Y - Constant-speed and constant-pressure metering pump - Google Patents

Constant-speed and constant-pressure metering pump Download PDF

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Publication number
CN201425008Y
CN201425008Y CN2008201868793U CN200820186879U CN201425008Y CN 201425008 Y CN201425008 Y CN 201425008Y CN 2008201868793 U CN2008201868793 U CN 2008201868793U CN 200820186879 U CN200820186879 U CN 200820186879U CN 201425008 Y CN201425008 Y CN 201425008Y
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cylinder
rolling type
worm
constant
metering pump
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Expired - Lifetime
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CN2008201868793U
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Chinese (zh)
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钱如树
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钱如树
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Abstract

The utility model provides a constant-speed and constant-pressure metering pump, which comprises a power device, two sets of transporting devices and a microcomputer. Each transporting device is provided with a worm-gear case, a rolling type lead screw, a connecting rod and two cylinders. Worm gears, worms and an outside nut of the rolling type lead screw are positioned inside each worm-gear case;each worm-gear case is connected with a draw rod, the draw rod is connected with a bearing plate, wherein, the worms are engaged with the worm gears, the worm gears are connected with the outside nutof the rolling type lead screw, the rolling type lead screw and the connecting rod are connected into a whole, and a supporting frame is arranged in the junction. One end of the rolling type lead screw and one end of the connecting rod are connected with pistons, and each piston has a corresponding cylinder, plugs and caps are arranged at the end of the cylinders, the plugs are connected with a three way cock, and the three way cock is provided with an outlet valve, a inlet valve and a pressure sensor. The metering pump of the utility model can supply continuously pulseless, constant-speed and constant-pressure fluid, the displacement range reaches five figures, and the measuring precision exceeds 1%.

Description

A kind of metering pump with constant speed and constant pressure
Technical field
The utility model relates to a kind of machinery that is used for First Astronautic Research Institute for Measurement and Test's fed sheet of a media, specifically, relates to a kind of metering pump, belongs to chemical machinery field.
Background technique
Metering pump is a kind of precision equipment that is mainly used in First Astronautic Research Institute for Measurement and Test's fed sheet of a media, and the metering pump structure is single cylinder or twin-tub normally.
Metering pump has two kinds of plunger type and piston types usually, and common metering method is that the sectional area of plunger or piston multiply by the length that plunger or piston move in pumping cylinder, and the twin-tub metering pump is generally piston type.
Present metering pump mainly exists following some deficiency:
1, when fed sheet of a media, can produce pulse, can not continue, constant speed, constant voltage ground fed sheet of a media;
2, advancing pump and fed sheet of a media can not be simultaneously, after medium transport is finished by the time;
3, twin cylinder pump advance the pump time add precompression setup time should be less than the medium efflux time, this just makes the velocity of discharge of pump be restricted;
4, the discharge capacity adjustment range is wide inadequately;
5, the instability of pumping cylinder size makes the pump measuring accuracy not enough.
Because these deficiencys, therefore existing metering pump is difficult to satisfy the measuring requirement under the various states.
The model utility content
The purpose of this utility model is to address the above problem, and a kind of new metering pump is provided, and it can continue, constant speed, constant voltage ground fed sheet of a media, and with respect to existing metering pump, has the bigger and higher measuring accuracy of bigger adjustment range.
Metering pump with constant speed and constant pressure of the present utility model, comprise and be used for power-actuated power plant, the feedway and the microcomputer that is used to regulate control that are used for FLUID TRANSPORTATION, wherein, power plant comprise actuating motor, electric machine support, coupling, bearing, bearing cap, worm screw, worm gear and Worm gear case, said worm screw links to each other with actuating motor, the opposite bearing of a pair of direction is equipped with at the two ends of worm screw, said feedway has two groups, every group of feedway is equipped with Worm gear case, the rolling type leading screw, connecting rod and two pumping cylinders, be connected with worm gear in the Worm gear case, the outer nut of worm screw and rolling type leading screw, be connected with pull bar on the Worm gear case, pull bar links to each other with support plate, wherein worm and wheel engagement, worm gear links to each other with the outer nut of rolling type leading screw, rolling type leading screw and connecting rod connect into a connecting body, both joints are provided with centralizing bracket, one end of rolling type leading screw and an end of connecting rod all link to each other with piston, every piston is corresponding to a pumping cylinder, said pumping cylinder end is provided with plug and pressure cap, plug links to each other with tee union, and outlet valve is housed on the tee union, inlet valve and pressure transducer.
Preferably, said rolling type leading screw is a ball screw.
Preferably, said rolling type leading screw is a planetary roller screw.
More preferably, said two groups of transport conveyor constructions are identical, both are parallel side by side, the pumping cylinder structure is identical, direction is opposite in every group of feedway two, two groups of feedways have four pumping cylinders, and the outlet valve of four pumping cylinders links to each other, and form pump discharge, the inlet valve of four pumping cylinders links to each other, and forms pump intake.The outer nut two ends of said rolling type leading screw are equipped with bearing, and bearing cap is arranged on the bearing, and bearing cap links to each other with Worm gear case; Said pumping cylinder is cylindric, and the cylinder outer wall is provided with radiating fin; Gland, butterfly spring and pressure cap are housed on the said piston successively; Said pull bar has four, all links to each other with support plate, and the center of support plate is connected on the pumping cylinder.The internal diameter of said pumping cylinder and cylinder length ratio were greater than 1: 4.
Wherein, roller type leading screw, roller type leading screw outer nut, the worm gear, pumping cylinder, connecting rod, radiating fin, pressure cap, tee union, inlet valve, outlet valve and the piston that link to each other with the outer nut of rolling type leading screw all are on the same shaft axis.
Metering pump of the present utility model has following technique effect:
1, metering pump of the present utility model can provide the constant airspeed that do not have pulse and the fluid of constant pressure continuously, and the discharge capacity adjustment range reaches five-digit number, and measuring accuracy surpasses 1%.
2, when the pump delivery increase, the diameter of pumping cylinder increases, and when the working pressure of pump increased, common leading screw can't meet the demands, and planetary roller screw can address the above problem, and its working forms is a rolling type still, and surface friction drag is little, and thrust is little, long service life.
3, the large-area radiating fin in pump chamber surface has solved stability, the sealing of pump chamber work, has improved the working stability and the working pressure of pump.
4, every pump chamber is all with respect to an opposite direction chamber, when a pump chamber is discharged medium, pump chamber charges into working medium in the other direction, make to discharge and charge into working medium and become the same time, this compares with original twin cylinder pump, saved a time that charges into working medium, under the condition that does not increase pumping cylinder diameter and power, pump delivery has increased one times, the pump delivery regulation range has also increased one times thereupon, if the working medium that charges into has pressure, just this pressure has become the power that promotes piston motion so, just further reduced the work energy consumption of pump, made pump obtain increase discharge capacity and minimizing energy consumption double effects.
5, because the prolongation of the time of switch operating is prepared in the time that charges into working medium of pump and precompression, this makes the bigger working medium of some compression ratios to be suitable for, as supercritical fluid.
Figure of description
Fig. 1 is the structural representation of metering pump of the present utility model;
Fig. 2 is the structural representation of metering pump of the present utility model under A cylinder and the pre-filling state of D cylinder;
Fig. 3 is the structural representation of metering pump of the present utility model under A cylinder working, the filling of B cylinder, the filling of C cylinder and D cylinder its pre-compressed state;
Fig. 4 is the structural representation of metering pump of the present utility model under the filling of A cylinder, the precompression of B cylinder, the filling of C cylinder and D cylinder working state;
Fig. 5 is the structural representation of metering pump of the present utility model under the filling of A cylinder, B cylinder working, the precompression of C cylinder and D cylinder filling state;
Fig. 6 is the structural representation of metering pump of the present utility model under the precompression of A cylinder, the filling of B cylinder, C cylinder working and D cylinder filling state.
Wherein, 1 is actuating motor, and 2 is electric machine support, 3 is coupling, and 4-1,4-2 are bearing, and 5-1,5-2 are bearing cap, 6 is worm screw, and 7 is worm gear, and 8 is Worm gear case, 9 is planetary roller screw, and 10 is connecting rod, and 11 is pumping cylinder, 12 is the outer nut of planetary roller screw mandrel, and 13 is centralizing bracket, and 14 is piston, 15 is plug, and 16-1,16-2 are pressure cap, and 17 is tee union, 18 is pneumatic stopping valve, 19 is pressure transducer, and 20 is pull bar, and 21 is radiating fin, 22 is gland, 23 is butterfly spring, and 24 is support plate, and 25 is microcomputer.
Embodiment
Below in conjunction with Figure of description, further instruction embodiment of the present utility model.
As shown in Figure 1, metering pump with constant speed and constant pressure of the present utility model, comprise and be used for power-actuated power plant, the feedway and the microcomputer 25 that is used to regulate control that are used for FLUID TRANSPORTATION, wherein, power plant comprise actuating motor 1, electric machine support 2, coupling 3, bearing 4-1, bearing cap 5-1, worm screw 6, worm gear and Worm gear case 8, said worm screw 6 links to each other with actuating motor 1, the opposite bearing 4-1 of a pair of direction is equipped with at the two ends of worm screw 6, said feedway has two groups of (first portions, second portion), structure is identical, both are parallel side by side, every group of feedway is equipped with Worm gear case, planetary roller screw 9, connecting rod 10 is identical with two structures, the cylindric pumping cylinder 11 that direction is opposite, the internal diameter of pumping cylinder 11 is 26~120mm, and length is 200~700mm, and two groups of feedways have four pumping cylinders 11, the outlet valve of four pumping cylinders 11 links to each other, form pump discharge, the inlet valve of four pumping cylinders 11 links to each other, and forms pump intake.Be connected with worm gear 7 in the Worm gear case, the outer nut 12 of worm screw and planetary roller screw mandrel 9, be connected with pull bar 20 on the Worm gear case, wherein worm and wheel 7 engagements, worm gear 7 links to each other with the outer nut 12 of planetary roller screw 9, planetary roller screw 9 connects into a connecting body with connecting rod 10, both joints are provided with centralizing bracket 13, one end of planetary roller screw 9 all links to each other with piston 14 with an end of connecting rod 10, every piston 14 is corresponding to a pumping cylinder 11, said pumping cylinder 11 ends are provided with plug 15 and pressure cap 16-1, plug 15 links to each other with tee union 17, and pneumatic stopping valve 18 and pressure transducer 19 as outlet valve and inlet valve are housed on the tee union 17.
In addition, outer nut 12 two ends of planetary roller screw 9 are equipped with bearing 4-2, and bearing cap 5-2 is arranged on the bearing 4-2, and bearing cap 5-2 links to each other with Worm gear case; Pumping cylinder 11 outer walls are provided with radiating fin 21; Gland 22, butterfly spring 23 and pressure cap 16-2 are housed on the piston 14 successively; Four pull bars 20 are arranged, all link to each other with support plate 24, the center of support plate is connected on the pumping cylinder 11.
As can be seen from Figure 1, wherein, the outer nut 12 of planetary roller screw 9, planetary roller screw, the worm gear 7 that links to each other with the outer nut of rolling type leading screw, pumping cylinder 11, connecting rod 12, radiating fin 21, pressure cap 22, tee union 17, pneumatic stopping valve 18, pressure transducer 19 and piston 14 as outlet valve and inlet valve all are on the same shaft axis.
Metering pump of the present utility model is when work, constantly gather the information of pressure transducer 19 and position switch by microcomputer 25, actuating motor 1 and pneumatic stopping valve 18 are sent action command in good time, actuating motor 1 drives worm screw 6, worm gear, outer nut 12 rotations of planetary roller screw mandrel 9 make planetary roller screw mandrel 9 drive piston 14 and do straight reciprocating motion.The pneumatic stopping valve 18 of pump chamber 11 ends is accepted microcomputer 25 instructions, opens and closes in good time.Microcomputer 25 shows the working state of instantaneous flow, integrated flow, working pressure and every pumping cylinder.
Specifically, the work of this metering pump comprises following several state:
1, the pre-filling state of A cylinder and D cylinder: as shown in Figure 2, at first each pump chamber of two groups of feedways is filled working medium in advance, establish first portion A chamber, second portion D chamber, filling operation medium at first, A at first works in the chamber;
2, A cylinder working, the filling of B cylinder, the filling of C cylinder and D cylinder its pre-compressed state: as shown in Figure 3, A chamber piston is by the pressure motion of discharge capacity of setting or setting, working medium is discharged, reciprocal B chamber filling operation simultaneously medium, the piston motion of D chamber, the working pressure in compression D chamber to A chamber is done the preparation of A, the switching of D chamber, when D prepares in the chamber action, reciprocal C chamber filling operation medium; When the piston motion of A chamber near the exhaust port end time, D chamber expulsion valve is opened, A chamber piston begins to do uniformly retarded motion, D chamber piston is done uniformly accelerated motion.The minimizing value of A chamber piston motion equals the value added of D chamber piston motion;
3, A cylinder filling, the precompression of B cylinder, the filling of C cylinder and D cylinder working state: as shown in Figure 4, when D chamber piston movement speed reaches the discharge capacity parameter value of setting, the expulsion valve in A chamber cuts out, the work of promptly finishing A, D chamber is switched, this moment B chamber piston make the compression work medium, make B, the switching in D chamber prepares, reciprocal A does in the chamber action of filling operation medium simultaneously;
4, under A cylinder filling, B cylinder working, the precompression of C cylinder and the D cylinder filling state: as shown in Figure 5;
5, A cylinder precompression, the filling of B cylinder, C cylinder working and D cylinder filling state, as shown in Figure 6;
The samely analogize, order is finished BC chamber, CA chamber ... switching, " 8 " word that has so just formed an Infinite Cyclic switches ring, has just formed the action chain of the continuous operation of pump.

Claims (6)

1, a kind of metering pump with constant speed and constant pressure, comprise and be used for power-actuated power plant, the feedway and the microcomputer that is used to regulate control that are used for FLUID TRANSPORTATION, wherein, power plant comprise actuating motor, electric machine support, coupling, bearing, bearing cap, worm screw, worm gear and Worm gear case, said worm screw links to each other with actuating motor, the opposite bearing of a pair of direction is equipped with at the two ends of worm screw, it is characterized in that, said feedway has two groups, every group of feedway is equipped with Worm gear case, the rolling type leading screw, connecting rod and two pumping cylinders, be connected with worm gear in the Worm gear case, the outer nut of worm screw and rolling type leading screw, be connected with pull bar on the Worm gear case, pull bar links to each other with support plate, wherein worm and wheel engagement, worm gear links to each other with the outer nut of rolling type leading screw, rolling type leading screw and connecting rod connect into a connecting body, both joints are provided with centralizing bracket, one end of rolling type leading screw and an end of connecting rod all link to each other with piston, every piston is corresponding to a pumping cylinder, said pumping cylinder end is provided with plug and pressure cap, plug links to each other with tee union, and outlet valve is housed on the tee union, inlet valve and pressure transducer.
2, metering pump with constant speed and constant pressure according to claim 1 is characterized in that, said rolling type leading screw is a ball screw.
3, metering pump with constant speed and constant pressure according to claim 1 is characterized in that, said rolling type leading screw is a planetary roller screw.
4, according to claim 1 or 2 or 3 described metering pump with constant speed and constant pressure, it is characterized in that, said two groups of transport conveyor constructions are identical, both are parallel side by side, and the pumping cylinder structure is identical, direction is opposite for two in every group of feedway, and two groups of feedways have four pumping cylinders, the outlet valve of four pumping cylinders links to each other, form pump discharge, the inlet valve of four pumping cylinders links to each other, and forms pump intake.
5, metering pump with constant speed and constant pressure according to claim 4 is characterized in that, the outer nut two ends of said rolling type leading screw are equipped with bearing, and bearing cap is arranged on the bearing, and bearing cap links to each other with Worm gear case; Said pumping cylinder is cylindric, and the cylinder outer wall is provided with radiating fin; Gland, butterfly spring and pressure cap are housed on the said piston successively; Said pull bar has four, all links to each other with support plate, and the center of support plate is connected on the pumping cylinder.
6, metering pump with constant speed and constant pressure according to claim 5 is characterized in that, the internal diameter of said pumping cylinder and cylinder length ratio were greater than 1: 4.
CN2008201868793U 2008-11-06 2008-11-06 Constant-speed and constant-pressure metering pump Expired - Lifetime CN201425008Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2008201868793U CN201425008Y (en) 2008-11-06 2008-11-06 Constant-speed and constant-pressure metering pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2008201868793U CN201425008Y (en) 2008-11-06 2008-11-06 Constant-speed and constant-pressure metering pump

Publications (1)

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CN201425008Y true CN201425008Y (en) 2010-03-17

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101446275B (en) * 2008-11-06 2011-03-16 钱如树 Metering pump with constant speed and constant pressure
CN104405611A (en) * 2014-10-13 2015-03-11 成都格莱精密仪器有限公司 Dual-drive solvent conveying pump
CN106370579A (en) * 2016-08-30 2017-02-01 海安华达石油仪器有限公司 Gas permeability determinator
CN106404498A (en) * 2016-08-30 2017-02-15 海安华达石油仪器有限公司 Vacuumizing and pressurizing saturation apparatus
CN106593803A (en) * 2017-02-06 2017-04-26 江苏拓创科研仪器有限公司 Novel constant-pressure constant-speed pump

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101446275B (en) * 2008-11-06 2011-03-16 钱如树 Metering pump with constant speed and constant pressure
CN104405611A (en) * 2014-10-13 2015-03-11 成都格莱精密仪器有限公司 Dual-drive solvent conveying pump
CN106370579A (en) * 2016-08-30 2017-02-01 海安华达石油仪器有限公司 Gas permeability determinator
CN106404498A (en) * 2016-08-30 2017-02-15 海安华达石油仪器有限公司 Vacuumizing and pressurizing saturation apparatus
CN106593803A (en) * 2017-02-06 2017-04-26 江苏拓创科研仪器有限公司 Novel constant-pressure constant-speed pump
WO2018141235A1 (en) * 2017-02-06 2018-08-09 江苏拓创科研仪器有限公司 Novel constant-pressure constant-speed pump

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AV01 Patent right actively abandoned

Granted publication date: 20100317

Effective date of abandoning: 20081106