CN205638829U - High accuracy measuring pump - Google Patents
High accuracy measuring pump Download PDFInfo
- Publication number
- CN205638829U CN205638829U CN201620452063.5U CN201620452063U CN205638829U CN 205638829 U CN205638829 U CN 205638829U CN 201620452063 U CN201620452063 U CN 201620452063U CN 205638829 U CN205638829 U CN 205638829U
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- check valve
- end cap
- piston rod
- fluid
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Abstract
The utility model discloses a high accuracy measuring pump, including fluid end and power end, the fluid end includes cylinder body, left end lid and right -hand member lid, the power end includes that drive arrangement, lead screw and piston machine construct, piston machine constructs including piston rod and piston, the piston hole formation sliding seal that the piston rod inserted in the cylinder body cavity and covered with left end lid and right -hand member, drive arrangement and screw rod transmission connection, lead screw pass through screw -nut and are connected with the piston rod transmission. The utility model discloses the fluid end is the single cylinder double -acting pump, guarantees the piston both sides stroke of having no time, improves the operating efficiency of whole device, the sealing force of piston and cylinder body inner wall distributes evenly, piston both sides sealed effectual, and the hourglass is to measuring accuracy's influence in avoiding. Set up the flow stability device on the fluid end fluid -discharge tube, effectively eliminate the piston flow pulsation in when switching -over. Through step motor directly through leadscrew -nut mechanism control piston stroke and speed, good control and the control of realization real -time flux, measuring accuracy height.
Description
Technical field
This utility model relates to fluid machinery technical field, especially relates to a kind of high-precision measuring pump.
Background technology
Pump belongs to a kind of fluid machinery, is the important component part of industrial flow.In many process commercial production, raw material, semi-finished product and product are liquid, and in order to ensure that successional pipeline metaplasia is produced, pump provides equipment and the conveying equipment of substance circulating, to fluid pressurization and conveying as the energy of production.It addition, pipeline metaplasia is produced the most usually changes such as the technological parameter such as temperature, pressure according to the regulation of flow, such as the most additionally mounted regulation valve, pump also should have the function controlling flow concurrently.
For solving flow-control and two requirements of conveying, dosing pump should be used.Due to the limitation problem of the errors of principles, drive system error and structure design, common dosing pump is difficult to real-time traffic control, and measuring accuracy is low, does not reaches the optimal working point of pipe-line system.
Utility model content
In order to overcome above-mentioned existing technological deficiency, the purpose of this utility model is to provide a kind of good airproof performance, and measuring accuracy is high, and real-time traffic controls, the single-cylinder dual-action dosing pump that high-precision flow regulation controls.
In order to achieve the above object, this utility model is achieved through the following technical solutions:
The technical program is a kind of high-precision measuring pump, including fluid end and power end；Fluid end includes cylinder body, left end cap and right end cap；Described left end cap top is provided with left bank liquid check valve, and bottom is provided with left feed liquor check valve；Described right end cap top is provided with right discharge opeing check valve, and bottom is provided with right feed liquor check valve；Described left end cap is externally provided with fluid proportion plate；The discharging tube being connected with left bank liquid check valve it is respectively equipped with, the feed tube being connected with left feed liquor check valve on fluid proportion plate；Described power end includes driving means, screw mandrel and piston mechanism；Described piston mechanism includes piston rod and piston；Described piston rod inserts in cylinder body cavity and forms slipper seal with the piston hole on left end cap and right end cap；Described driving means is connected with screw rod transmission, and screw mandrel is in transmission connection with piston rod by feed screw nut.
During dosing pump work, the stepping motor of power end drives the piston movement of fluid end by screw mandrel and nut.When piston is to left movement, right feed liquor check valve and left bank liquid check valve are opened, left feed liquor check valve and right discharge opeing closed check valve, liquid passes through feed tube, sucked the right chamber of cylinder body cut off by piston by right feed liquor check valve, the liquid in the most left chamber is exported in the pipe-line system being directly connected by discharging tube；When piston moves right, left feed liquor check valve and right discharge opeing check valve are opened, right feed liquor check valve and left bank liquid closed check valve, liquid passes through feed tube, sucked the left chamber of cylinder body cut off by piston by right feed liquor check valve, the liquid in the rightest chamber is exported in the pipe-line system being directly connected by discharging tube.
As optimization, described driving means is stepping motor, and stepping motor outfan is connected with screw rod transmission through connecting plate by shaft coupling, and stepping motor directly controls stroke and the speed of piston by feed screw nut, can realize real-time traffic control, measuring accuracy is high.
As optimization, two ends, the left and right throw of lever terminal of described piston is all respectively equipped with the left inductive switch and right inductive switch electrically connected with stepping motor.The rotating of the stepping motor of arranged on left and right sides location sensitive on-off control power end, it is achieved the bilateral reciprocation of piston, the continuous suction of liquid.
As optimization, described discharging tube is provided with flow stabilization apparatus, effectively eliminates flow pulsation during piston commutation.
As optimization, described piston rod is hollow structure and its outer surface is bright finish.Piston rod outer surface is the mechanical dynamic seal that between bright finish and end cap, stroke is good, good sealing effect, and effectively control to leak outside the impact on measuring accuracy；Piston rod is hollow structure, light weight, can reduce the reciprocal inertia force impact on stroke of piston movement, improves measuring accuracy.
As optimization, described feed liquor check valve and discharge opeing check valve are ball valve.The opening and closing element of ball valve is spheroid, cooperatively forms linear sealing structure with valve seat, and sealing force is little, seals reliable and opening and closing is timely, it is to avoid valve is not closed completely and the opening/shutting valve time delay impact on measuring accuracy.
Compared with prior art, the beneficial effects of the utility model are: this utility model can carry out Flow-rate adjustment, and each parts good airproof performance in real time, and measuring accuracy is high.Fluid end is single-cylinder double-acting pump, it is ensured that piston both sides do not have idle stroke, improves the operational efficiency of whole device；Piston is evenly distributed with the sealing force of inboard wall of cylinder block, the good sealing effect of piston both sides, it is to avoid the internal hemorrhage due to trauma impact on measuring accuracy.On fluid end discharging tube, flow stabilization apparatus is set, effectively eliminates flow pulsation during piston commutation.Directly controlling piston stroke and speed by screw-nut body by motor, good control and realize real-time traffic control, measuring accuracy is high.Piston rod outer surface is the mechanical dynamic seal that between bright finish and end cap, stroke is good, good sealing effect, and effectively control to leak outside the impact on measuring accuracy；Piston rod is hollow structure, light weight, can reduce the reciprocal inertia force impact on stroke of piston movement, improves measuring accuracy.Feed liquor check valve and discharge opeing check valve are arranged on cylinder body end face, reduce the clearance volume of cylinder body to greatest extent, it is to avoid the highly pressurised liquid of residual affects liquid absorption, are conducive to improving device amount of infusion precision.Feed liquor check valve and discharge opeing check valve are ball valve, and opening and closing element is spheroid, cooperatively forms linear sealing structure with valve seat, and sealing force is little, seal reliable and opening and closing is timely, it is to avoid valve is not closed completely and the opening/shutting valve time delay impact on measuring accuracy.
Accompanying drawing explanation
This utility model will illustrate by example and with reference to the appended drawing, wherein:
Fig. 1 is front view of the present utility model.
Fig. 2 is top view of the present utility model.
Fig. 3 is that the A in Fig. 2 is to sectional view.
Labelling in figure: fluid proportion plate 1, left end cap 2, cylinder body 3, piston rod 4, piston 5, feed screw nut 6, right end cap 7, right discharge opeing check valve 8, connecting plate 9, screw mandrel 10, shaft coupling 11, connecting plate 12, stepping motor 13, right feed liquor check valve 14, end cap seal part 15, piston seal 16, spring collar 17, feed tube 18, discharging tube 19, flow stabilization apparatus 20, left bank liquid check valve 21, left feed liquor check valve 22, leftward position inductive switch 23 and right positions inductive switch 24.
Detailed description of the invention
Below in conjunction with the accompanying drawings, this utility model is described in detail.
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain this utility model, is not used to limit this utility model.
Embodiment 1, as shown in Figure 1, Figure 2 with shown in Fig. 3, this utility model is a kind of high-precision measuring pump, including fluid end and power end；Fluid end includes cylinder body 3, left end cap 2 and right end cap 7；Described left end cap 2 top is provided with left bank liquid check valve 21, and bottom is provided with left feed liquor check valve 22；Described right end cap 7 top is provided with right discharge opeing check valve 8, and bottom is provided with right feed liquor check valve 14；Described left end cap 2 is externally provided with fluid proportion plate 1；The discharging tube 19 being connected with left bank liquid check valve 21 it is respectively equipped with, the feed tube 18 being connected with left feed liquor check valve 22 on fluid proportion plate 1；Described power end includes driving means, screw mandrel 10 and piston mechanism；Described piston mechanism includes that piston rod 4 and piston 5, piston 5 are tightly connected with piston rod 4 by spring collar 17, and piston 5 is tightly connected with cylinder body 1 inner surface by piston seal 16；Described piston rod 4 inserts in cylinder body 3 cavity and forms slipper seal with the piston hole on left end cap 2 and right end cap 7, by end cap seal part 15 slipper seal between piston rod 4 and left and right end cap；Described driving means is in transmission connection with screw mandrel 10, and screw mandrel 10 is in transmission connection with piston rod 4 by feed screw nut 6.
This utility model is a kind of adjustable positive-displacement pump, can regulate flow in real time, measuring accuracy can be controlled in ± and the scope of 0.1%, it is adaptable to amount of conveyed liquid is required the pipe-line system that error is little.Solve general dosing pump Flow-rate adjustment not in time, measuring accuracy low, cause the technological parameter of pipe-line system because the fluctuation problem to process effects that produces of flow output error.In this utility model, fluid end is mainly by cylinder body 3, left end cap 2, right end cap 7, piston 5, left and right feed liquor check valve 22 and 14, left and right discharge opeing check valve 21 and 8, piston seal 16, feed tube 18 and discharging tube 19 form a single-cylinder double-acting pump, complete the continuous suction of liquid.Power end is by piston rod 4, screw mandrel 10, and feed screw nut 6, and shaft coupling 11 and stepping motor 13 form, and completes the energy of prime mover is passed to fluid end.
During dosing pump work, the stepping motor 13 of power end drives the piston 5 of fluid end to move by screw mandrel 10 and nut 6.When piston 5 is to left movement, right feed liquor check valve 14 and left bank liquid check valve 21 are opened, left feed liquor check valve 22 and right discharge opeing check valve 8 are closed, liquid passes through feed tube 18, sucked the right chamber of cylinder body 3 cut off by piston 5 by right feed liquor check valve 14, the liquid in the most left chamber is exported in the pipe-line system being directly connected by discharging tube 19；When piston 5 moves right, left feed liquor check valve 22 and right discharge opeing check valve 8 are opened, right feed liquor check valve 14 and left bank liquid check valve 21 are closed, liquid passes through feed tube 18, sucked the left chamber of cylinder body 3 cut off by piston 5 by right feed liquor check valve 14, the liquid in the rightest chamber is exported in the pipe-line system being directly connected by discharging tube 19.
Left and right feed liquor check valve and left and right discharge opeing check valve are arranged on cylinder body 3 end face, reduce the clearance volume of cylinder body 3 to greatest extent, it is to avoid the highly pressurised liquid of residual affects liquid absorption, are conducive to improving device amount of infusion precision.Fluid end is single-cylinder double-acting pump, it is ensured that piston 5 both sides do not have idle stroke, improve the operational efficiency of whole device；Piston 5 is evenly distributed with the sealing force of cylinder body 3 inwall, the good sealing effect of piston 5 both sides, it is to avoid the internal hemorrhage due to trauma impact on measuring accuracy.Driving means controls stroke and the speed of piston 5 by feed screw nut 6, it is achieved real-time traffic controls, and measuring accuracy is high.In order to prevent the internal hemorrhage due to trauma of fluid end, piston 5 uses sealing member to seal with the inwall of cylinder body 3, piston 5 with piston rod 4 junction.In order to prevent leaking outside of fluid end, between piston rod 5 and left and right end cap 2 and 7, sealing member between cylinder body 3 and left and right end cap 2 and 7, is the most all used to seal.The structure design of hydraulic device has taken into full account clearance volume, internal hemorrhage due to trauma and the impact on flow accuracy that leaks outside.
Embodiment 2, is optimized design to the connected mode of driving means and driving means and screw mandrel 10 on the basis of embodiment 1, and described driving means is stepping motor, and stepping motor 13 outfan is in transmission connection with screw mandrel 10 through connecting plate 12 by shaft coupling 11.Volume or the quality of dosing pump drain are directly proportional to the cross-sectional flow area of piston 5 accumulative displacement and dosing pump, therefore, the angular displacement turned over by the umber of pulse control stepping motor of control wave realizes total liquid volume or the metering of gross mass that dosing pump is discharged, and is realized the control of liquid meter speed by the rotating speed of the FREQUENCY CONTROL stepping motor 13 of control wave.Stepping motor 13 directly controls stroke and the speed of piston 5 by feed screw nut 6, can realize real-time traffic control, and measuring accuracy is high.
Embodiment 3, on the basis of embodiment 1 or embodiment 2, the method for operation to stepping motor 13 is optimized design, and the stroke end, two ends, left and right of described piston rod 4 is all respectively equipped with the left inductive switch 23 and right inductive switch 24 electrically connected with stepping motor 13.
In order to realize the continuous suction process of liquid, accomplish the most real-time flow-control, by the rotating of the stepping motor 13 of arranged on left and right sides location sensitive switch 23 and 24 control power end, it is achieved the left and right of piston 5 automatically moves back and forth.Stepping motor 13 rotates forward and drives piston 5 to left movement, when moving to stroke end, left side, right positions inductive switch 24 sends signal control stepping motor 13 reversion and moves right, when stroke end on the right side of motion, leftward position inductive switch 23 sends signal and controls the motion of stepping motor 13 positive port, and such iterative cycles realizes the control that automatically moves back and forth about piston.
Embodiment 4, on the basis of embodiment 3, the structure to discharging tube 19 is optimized design, and described discharging tube 19 is provided with flow stabilization apparatus 20.In order to improve real time measure precision further, the discharging tube 19 of fluid end have employed flow stabilization apparatus 20, to reduce the flow pulsation when commutation of the piston 5 of fluid end.
Embodiment 5, on the basis of embodiment 1 or embodiment 4, the mechanism to piston rod 4 is optimized design, and described piston rod 4 is bright finish for hollow structure and its outer surface.Piston rod 4 and the contact surface of left and right end cap are bright finish and it is internal for hollow structure.Sealing between piston rod 4 outer surface and end cap belongs to mechanical dynamic seal, requirement to sealing surfaces is high, in order to avoid sealing surface is flank, devising feed screw nut's device, in piston rod 4, machining internal thread can meet and the connection request of feed screw nut 6, Dynamic sealing surface is smooth external cylindrical surface, comparing thread seal, dynamic sealing device simple in construction, the life-span is long, good sealing effect, effectively control to leak outside the impact on measuring accuracy.Owing to piston rod 4 is hollow structure, light weight, the reciprocal inertia force impact on stroke of piston 6 motion can be reduced, preferably improve measuring accuracy.
Embodiment 6, carries out decision design on the basis of embodiment 1 to feed liquor check valve and discharge opeing check valve, and described feed liquor check valve and discharge opeing check valve are ball valve.The opening and closing element of ball valve is spheroid, cooperatively forms linear sealing structure with valve seat, and sealing force is little, seals reliable and opening and closing is timely, it is to avoid valve is not closed completely and the opening/shutting valve time delay impact on measuring accuracy.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, within should be included in protection domain of the present utility model.
Claims (6)
1. a high-precision measuring pump, it is characterised in that: include fluid end and power end；Fluid end includes cylinder body (3), left end cap (2) and right end cap (7)；Described left end cap (2) top is provided with left bank liquid check valve (21), and bottom is provided with left feed liquor check valve (22)；Described right end cap (7) top is provided with right discharge opeing check valve (8), and bottom is provided with right feed liquor check valve (14)；Described left end cap (2) is externally provided with fluid proportion plate (1)；The discharging tube (19) being connected with left bank liquid check valve (21) it is respectively equipped with, the feed tube (18) being connected with left feed liquor check valve (22) on fluid proportion plate (1)；
Described power end includes driving means, screw mandrel (10) and piston mechanism；Described piston mechanism includes piston rod (4) and piston (5)；Described piston rod (4) inserts in cylinder body (3) cavity and forms slipper seal with the piston hole on left end cap (2) and right end cap (7)；Described driving means is in transmission connection with screw mandrel (10), and screw mandrel (10) is in transmission connection with piston rod (4) by feed screw nut (6).
A kind of high-precision measuring pump the most according to claim 1, it is characterised in that: described driving means is stepping motor, and stepping motor outfan is in transmission connection with screw mandrel (10) through connecting plate (12) by shaft coupling (11).
A kind of high-precision measuring pump the most according to claim 1 and 2, it is characterised in that: all it is respectively equipped with the left inductive switch (23) electrically connected with stepping motor (13) and right inductive switch (24) on the stroke end, two ends, left and right of described piston rod.
A kind of high-precision measuring pump the most according to claim 3, it is characterised in that: described discharging tube (19) is provided with flow stabilization apparatus (20).
5. according to a kind of high-precision measuring pump described in claim 1 or 4, it is characterised in that: described piston rod (4) is hollow structure and its outer surface is bright finish.
A kind of high-precision measuring pump the most according to claim 1, it is characterised in that: described feed liquor check valve and discharge opeing check valve are ball valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620452063.5U CN205638829U (en) | 2016-05-18 | 2016-05-18 | High accuracy measuring pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620452063.5U CN205638829U (en) | 2016-05-18 | 2016-05-18 | High accuracy measuring pump |
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| Publication Number | Publication Date |
|---|---|
| CN205638829U true CN205638829U (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620452063.5U Expired - Fee Related CN205638829U (en) | 2016-05-18 | 2016-05-18 | High accuracy measuring pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN205638829U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840446A (en) * | 2016-05-18 | 2016-08-10 | 四川理工学院 | High-precision metering pump |
| CN106988742A (en) * | 2017-04-14 | 2017-07-28 | 中国神华能源股份有限公司 | Hydraulic pump drive hydraulic shock pick closed system and its control method |
-
2016
- 2016-05-18 CN CN201620452063.5U patent/CN205638829U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840446A (en) * | 2016-05-18 | 2016-08-10 | 四川理工学院 | High-precision metering pump |
| CN105840446B (en) * | 2016-05-18 | 2018-06-01 | 四川理工学院 | A kind of high-precision measuring pump |
| CN106988742A (en) * | 2017-04-14 | 2017-07-28 | 中国神华能源股份有限公司 | Hydraulic pump drive hydraulic shock pick closed system and its control method |
| CN106988742B (en) * | 2017-04-14 | 2019-03-05 | 中国神华能源股份有限公司 | Hydraulic pump drives hydraulic shock pick closed system and its control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161012 Termination date: 20200518 |
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| CF01 | Termination of patent right due to non-payment of annual fee |