CN104454502B - Plunger displacement pump - Google Patents
Plunger displacement pump Download PDFInfo
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- CN104454502B CN104454502B CN201310428483.0A CN201310428483A CN104454502B CN 104454502 B CN104454502 B CN 104454502B CN 201310428483 A CN201310428483 A CN 201310428483A CN 104454502 B CN104454502 B CN 104454502B
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- valve body
- displacement pump
- plunger
- adjustment seat
- oil
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Abstract
The present invention provides a kind of plunger displacement pump, including：Valve body with main valve body and left and right valve body, the valve body is provided with the fluid passage connected with oil-in, oil-out, the flow-limiting valve for being provided with the control oil-in and oil-out opening and closing in the fluid passage, the closed hydraulic cavities connected with the fluid passage are provided with the main valve body, are provided with plunger in hydraulic cavities；Driving section is driven, including connecting rod and adjustment seat, the small end is articulated with the plunger bottom, and the connecting rod lower end is articulated with the adjustment seat；Discharge capacity adjustment portion, it is arranged in the adjustment seat, including the regulating block being embedded in the adjustment seat, the jointed shaft being connected on the regulating block, adjust the regulation actuator of hinged shaft position, the plunger displacement pump that the present invention is provided, accurate discharge capacity can be provided according to the needs of different displacements.
Description
Technical field
The present invention relates to a kind of pump, more particularly to a kind of plunger displacement pump.
Background technology
Plunger displacement pump is a kind of positive displacement pump, by motor-driven, by reduction box and toggle and piston rod phase
Connect and make piston reciprocating.It relies on the reciprocating motion of piston and opens inlet valve and dump valve successively, so as to suck
With discharge liquid.Its operation principle is：With the reciprocating motion of piston, when the volume of operating room increases, low pressure is formed, will can be store
Liquid in liquid pool is through in inlet valve suction pumping cylinder.In imbibition body, dump valve is because being closed by fluid pressure effect in discharge pipe
Close.Hereafter, when the volume of operating room reduces, in pumping cylinder, liquid is squeezed and increases its pressure, cause suction valve closure and
Push dump valve open liquid is discharged, complete working cycles.Plunger displacement pump can obtain very high row pressure, and flow and pressure nothing
Close, intake performance is good, and efficiency is higher.
It is not required to pour into liquid during plunger pump startup, because plunger displacement pump has suction capacity, but its high-pressure plunger pump sucts vacuum height
Degree also changes with the atmospheric pressure of pump operating area, the property of liquid and temperature, therefore the peace of the height of reservoir and plunger displacement pump
The difference of dress height also has certain limitations, or is pressurizeed to reservoir with pressure maintaining valve control compressed air.The flow of plunger displacement pump can not be used
Valve on discharge line is adjusting, and using shunt valve or changes the reciprocal time of piston, changes the stroke of piston to realize.
And traditional plunger displacement pump is moved back and forth by actuated by cams piston, and the mode of actuated by cams reciprocating motion of the pistons can not
Regulating piston stroke, cannot also adjust fuel delivery.And provide a kind of can as needed Displacement Regulation plunger displacement pump actually this
Skilled person desires most ardently the technical problem of solution.
Content of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of plunger displacement pump, existing for solving
There is the problem that plunger pumpage can not be adjusted in technology.
For achieving the above object and other related purposes, the present invention provides a kind of plunger displacement pump, including：Valve body, the valve body
Left and right be respectively arranged at two ends with oil-in, oil-out, the valve body be provided with connect with oil-in, oil-out fluid passage,
The flow-limiting valve of the control oil-in and oil-out opening and closing is provided with fluid passage between the oil-in and oil-out, described
The closed hydraulic cavities connected with the fluid passage are provided with valve body, are provided with plunger in the hydraulic cavities；Drive driving section,
Including connecting rod and adjustment seat, the small end is articulated with the plunger bottom, and the connecting rod lower end is articulated with the adjustment seat
On；Discharge capacity adjustment portion, is arranged in the adjustment seat, the adjustable regulating block in the position including being embedded in the adjustment seat, solid
The jointed shaft hinged for connecting rod lower end and the adjustment seat being connected on the regulating block, the regulation for adjusting hinged shaft position are driven
Moving part.
Specifically, the valve body includes the left and right valve body of main valve body and main valve body both sides, divides on the left and right valve body
Oil-in, oil-out are not provided with.
Specifically, the regulating block is T-shaped slide block.
Specifically, the regulation actuator is adjusting screw, and the adjusting screw is threadeded with the regulating block, the tune
With thread fiting part between section screw and the regulating block.
Specifically, pointer is connected with the jointed shaft, the adjustment seat is provided with needle dial corresponding with the pointer.
Specifically, the jointed shaft is one to be connected in the connecting rod on regulating block.
Specifically, the top end of the valve body is provided with the hand piston extended to inside the hydraulic cavities, and the valve body is provided with
Limiting locking device.
Specifically, the limiting locking device includes the locking that stopper slot on hand piston and the stopper slot coordinate
Screw, the limited block being placed in above valve body.
Specifically, the hand piston is provided with sealing ring.
Specifically, the flow-limiting valve on the fluid passage is single-way flow restricting valve, including import flow-limiting valve, outlet flow-limiting valve；
The import flow-limiting valve includes inlet spool and import stage clip, and the outlet flow-limiting valve includes outlet valve core and outlet stage clip.
Specifically, the junction of the connecting rod and plunger and connecting rod is respectively equipped with oscillating bearing.
Specifically, the adjustment seat is connected with input shaft by a shaft coupling, with clutch on the adjustment seat periphery
Piece.
Specifically, the plunger has three sealing rings, forms two and connect bakie between three sealing rings.
As described above, the adjustable plunger displacement pump of the discharge capacity of the present invention, has the advantages that：The present invention is by changing cam
The mode of piston reciprocation motion is driven, provides a kind of adjustable eccentric adjusting seat so that adjustment seat often rotates a circle, pump housing reality
Existing working cycles such that it is able to the discharge rate of precise control one action circulation；And install additional in plunger seal problem
Multiple sealing rings simultaneously form multiple sealing problems for connecing bakie, can not only solving valve body, and can store lubricating oil, prolong
The service life of centre long plunger pump.
Description of the drawings
Fig. 1 is shown as the overall front view of the present invention.
Fig. 2 is shown as the valve body organigram of the present invention.
Fig. 3 is shown as the driving driving section schematic diagram of the present invention.
Fig. 4 is shown as the overall side view of the present invention.
Fig. 5 is shown as present invention totality side-looking partial schematic diagram.
Fig. 6 is shown as the enlarged drawing at overall side view B of the present invention.
Component label instructions
1 valve body
11 main valve bodies
111 hydraulic cavities
1111 sealing rings
1112 plungers
1113 connect bakie
112 fluid passages
12 left valve barrels
121 imports
13 right valve barrels
131 outlets
14 hand pistons
141 handles
142 stopper slots
15 limiting locking devices
151 limited blocks
152 lock-screws
16 flow-limiting valves
161 import flow-limiting valves
1611 inlet spools
1612 import stage clips
162 drive driving section
1621 connecting rods
1622 oscillating bearings
2 drive driving section
21 connecting rods
22 oscillating bearings
23 adjustment seats
231 needle dials
232 clutch-plates
2321 hold-down bolts
233 limiting sections
24 shaft couplings
241 clutch bolts
25 input shafts
3 discharge capacity adjustment portions
31 regulating blocks
311 jointed shafts
3111 pointers
3112 connecting rods
32 adjust actuator
321 stopper slots
Specific embodiment
Hereinafter embodiments of the present invention are illustrated by particular specific embodiment, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages of the present invention and effect easily.
Refer to Fig. 1 to Fig. 6.It should be clear that structure depicted in this specification institute accompanying drawings, ratio, size etc., all only in order to
Coordinate the content disclosed in specification, so that those skilled in the art understands and reads, being not limited to the present invention can be real
The qualifications that applies, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or size
Whole, under the effect for not affecting the present invention can be generated by and the purpose that can be reached, still all should fall in disclosed skill
In the range of art content is obtained and can be covered.Meanwhile, in this specification cited as " on ", D score, "left", "right", " centre " and
The term of " one " etc., is merely convenient to understanding for narration, and is not used to limit the enforceable scope of the present invention, its relativeness
It is altered or modified, under nothing substantially change technology contents, when being also considered as the enforceable category of the present invention.
As shown in figure 1, the present invention provides a kind of plunger displacement pump, including：Valve body 1, driving driving section 2 and discharge capacity adjustment portion 3；Institute
State valve body 1 to provide circulation passage for liquid and execute default on-off action so that liquid controllably passes through valve body 1, institute
It is that valve body 1 provides activation force to state driving driving section 2, and the discharge capacity adjustment portion 3 is by the fortune of the regulation driving driving section 2
Dynamic stroke reaches the discharge capacity for controlling the valve body 1.
In order to more clearly the present invention be described, the valve body construction signal that Fig. 2 to Fig. 6, Fig. 2 are shown as the present invention is referred to
Figure, Fig. 3 are shown as the driving driving section schematic diagram of the present invention, and Fig. 4 is shown as the overall side view of the present invention, and Fig. 5 is shown as this
The overall side-looking partial schematic diagram of invention, Fig. 6 are shown as the enlarged drawing at overall side view B of the present invention.
In valve body 1, including：Import 121,131 main valve bodies 11 of outlet, left valve barrel 12, right valve barrel 13, flow-limiting valve 16 and manually
The fluid passage 112 that piston 14 and limiting locking device 15 and level run through；The main valve body 11 be placed in the left valve barrel 12 and
Between right valve barrel 13, specifically, the main valve body 11 also includes to extend vertically through the hydraulic cavities 111 of the main valve body 11, the liquid
Pressure chamber 111 is connected with fluid passage 112, wherein, is provided with sealing ring 1111 and plunger 1112 in the hydraulic cavities 111；The hand
Piston 14 is placed in 111 inner upper end of the hydraulic cavities, and which includes handle 141 and stopper slot 142, and the hand piston 14 is placed in
111 interior section of the hydraulic cavities is equipped with the sealing ring 1111, to 111 top seal of the hydraulic cavities, the hand piston
The 14 pre- conveyings for being used for whole plunger displacement pump；The limiting locking device 15 includes the limited block 151 for being arranged at the valve body upper end
And the lock-screw 152 used cooperatively with the stopper slot, the limiting locking device 15 is for entering to the hand piston 14
Row locking positioning.With import 121 on the left valve barrel 12, there is on the right valve barrel 13 outlet 131, the flow-limiting valve 16 is
Single-way flow restricting valve, is arranged between the import 121 and outlet 131, and which includes the import flow-limiting valve 161 of left end and going out for right-hand member
Mouth flow-limiting valve 162, further, the import flow-limiting valve 161 includes inlet spool 1611 and import stage clip 1612, the outlet limit
Stream valve 162 includes outlet valve core 1621 and outlet stage clip 1622, the liquid in the fluid passage 112 flow to direction set gradually into
Import stage clip received by mouth valve element 1611, import stage clip 1612, outlet valve core 1621 and outlet stage clip 1622, the inlet spool 1611
1612 active force seals the fluid passage 112 for flowing to main valve body 11 from left valve barrel 12, and the inlet spool 1611 is led with place
There is gap to groove inwall, this gap does not affect inlet spool 1611 to seal adjacent with main valve body 11 fluid in the left valve barrel 12
Passage 112, likewise, outlet valve core 1621 seals the fluid from main valve body 11 under the active force of the outlet stage clip 1622
Passage 112, the outlet valve core 1621 have gap with place gathering sill inwall, and this gap does not affect outlet valve core 1621 to seal institute
Adjacent with right valve barrel fluid passage 112 in main valve body 11 is stated, such setting ensure that the uniformity of liquid flow direction, that is, protect
The one-way flow of liquid is demonstrate,proved, the liquid does not include corrosive liquids, if the sealing ring 1111 is made of stainless steel,
Can be used for corrosive liquids.
The plunger 1112 is placed in the hydraulic cavities 111, is provided with 3 sealing rings 1111, this three sealing rings
Between constitute 2 and connect bakie 1113, connect in bakie 1113 and be placed with lubricating oil at this, 1112 lower end of the plunger is connected with driving
Driving section 2.
The driving driving section 2 specifically includes connecting rod 21, oscillating bearing 22, adjustment seat 23, shaft coupling 24 and input shaft 25；
21 upper end of the connecting rod is connected to 1112 bottom of the plunger by oscillating bearing 22, and its lower end is connected to by oscillating bearing 22
The adjustment seat 23, the adjustment seat 23 are disc structure, and its one end has the prominent axle used cooperatively with the shaft coupling 24,
With T-shaped chute therein is embedded in, the adjustment seat 23 specifically includes the needle dial 231 and clutch-plate being arranged on to the other end
232, the clutch-plate 232 is pressed on 23 excircle of the adjustment seat by hold-down bolt 2321, loosens the hold-down bolt
2321 can make the clutch-plate 232 rotate around the hold-down bolt 2321；With clutch bolt 241 on the shaft coupling 24, institute
Stating can be against the clutch bolt 241 after clutch-plate 232 turns over certain angle, and the clutch-plate 232 is used for input shaft 25
Power pass to the adjustment seat 23, the adjustment seat 23 is connected to the input shaft 25 by shaft coupling 24, the shaft coupling
24 are fixedly connected with the input shaft 25, and the adjustment seat 23 is axially fixed at the shaft coupling 24, the joint by bearing
Bearing 22 can bear larger load.According to its different type and structure, radial load, axial load or footpath can be born
To, axial simultaneous joint load.Due to studding with composite on the spherical outside surface of inner ring, therefore the bearing at work may be used
Produce self-lubricating.The relatively low oscillating motion of speed, and low speed rotation is generally used for, also can make to incline fortune in the range of certain angle
Dynamic, when support shaft and axle housing hole nonconcentricity are larger, remain to normal work.Self-lubricating knuckle bearing is applied to water conservancy, specialty
The industries such as machinery.In another embodiment, the connecting rod 21 can be hinged with the plunger 1112 and adjustment seat 23.
The discharge capacity adjustment portion 3 is arranged in the adjustment seat 23, including the regulating block being embedded in the adjustment seat 23
31st, the jointed shaft 311 being connected on the regulating block 31, the regulation actuator 32 for adjusting 311 position of jointed shaft, the adjustment seat
Limiting section 233 is provided with 23 excircles；The regulating block 31 is T-shaped slide block, and the T-shaped slide block can be in the adjustment seat 23
Slide in T-shaped chute, 31 middle-end of the regulating block is provided with jointed shaft 311,311 axis direction of the jointed shaft and the regulation
The axis direction of seat 23 is identical, and the jointed shaft 311 is a connecting rod 3112, the connecting rod 3112 and 31 spiral shell of the regulating block
The mode that is fixedly connected such as connect, or weld to fix with the regulating block 31, the connecting rod 3112 can also be with the company
Bar 21 is hinged, it is preferred that the connecting rod 3112 is connected with the connecting rod 21 by oscillating bearing 22；Specifically, described
Pointer 3111 is additionally provided with connecting rod 3112, the pointer 3111 is used cooperatively with the needle dial 231, the regulation actuator
32 in the limiting section 233 on 23 excircle of the adjustment seat, and is bolted in the regulating block 31, the regulation actuator 32
Specially adjusting screw, the regulation actuator 32 is with stopper slot 321 so as in 233 draw-in groove of limiting section of adjustment seat 23 only
Can rotate, it is impossible to displacement, 31 inside of regulating block is had the thread fiting part used cooperatively with the adjusting screw and (do not give figure
Show), the adjusting screw is completely screwed into 31 screw thread in the hole of the regulating block；I.e. adjusting screw passes through thread fiting part by driving force
Pass to the regulating block 31 so that the regulating block can realize straight-line displacement；In another embodiment, the regulation
It is to threaded between screw and 233 draw-in groove of limiting section, now the adjusting screw can be by screw thread in the limiting section 233
The adjusting screw now, can be embedded in the regulating block 31 so that the adjusting screw can be in institute by rotation and axial displacement
State in regulating block 31 idle running and the embedded part can stand tightly against the regulating block 31, can so drive the regulating block 31
Move reciprocatingly, i.e., so that the adjusting screw is by the embedded part against the regulating block 31, drive the regulating block 31 past
Multiple slip；The regulation actuator 32 can be driven in T-shaped chute of the regulating block 31 in the adjustment seat 23 to be carried out relatively
Slide, to reach default eccentricity value.
The course of work of the present invention：According to actual needs, adjust the regulation actuator 32 to adjust pointer 3111 to pre-
If value, that is, complete the center set of pre- fixed displacement；Clutch-plate 232 is turned at clutch bolt 241, and is compressed, so that described
Clutch-plate 232 can be stably against the clutch bolt 241, so that the rotary power of shaft coupling 24 is transferred to adjustment seat 23；
Open machine, power is transferred to adjustment seat 23 by input shaft 25, by arrange 23 drivening rod 21 of adjustment seat of bias do little
The swing of amplitude, drives plunger 1112 to pump, when plunger 1112 is run downwards, due to closed hydraulic cavities
111 spaces become big, and pressure reduces therewith, until external pressure is more than 111 internal pressure of hydraulic cavities, due to the import flow-limiting valve
161 and outlet 162 structure setting of flow-limiting valve, cause import flow-limiting valve 161 to be opened, outlet flow-limiting valve 162 close, concrete manifestation
In, inlet spool 1611 in the presence of import stage clip 1612, prevent liquid (air) that hydraulic cavities 111 are entered, work as external pressure
More than import stage clip 1612 active force when, inlet spool 1611 moves right, and causes the liquid (air) can be from inlet spool
1611 peripheries pass through, and enter hydraulic cavities 111, and in the process, outlet valve core 1621 can prevent to seal inside and outside liquid (sky
Gas) circulation passage；Accordingly, when plunger 1112 runs up, import flow-limiting valve 161 is closed, and outlet flow-limiting valve 162 is opened；
Specifically, before the non-pumping liquid of hydraulic cavities 111, pump into that pump out is air；Input shaft 25 for each revolution, this plunger displacement pump
Complete a pump liquid action, due to the amount for pumping out every time be by set, so, this plunger displacement pump can accurately ensure each pump
The amount for going out.
Under another embodiment, up and down reciprocatingly drawn, pushed away manual plunger 14 with hand, in manual processes, post to be prevented
Plug 1112 moves up and down, and for example, clutch-plate 232 is turned an angle and abuts against connecting rod 21；Or regulation actuator 32 makes
Jointed shaft 311 is located at 23 center of adjustment seat so that the connecting rod 21 being attached thereto is without eccentricity value, it is impossible to provide the chamber expert of plunger
Journey；After this, when the outlet of valve body 1 131 pumps out the first drop of liquid, stop manual activity, will be lived manually with lock-screw 152
Plug 14 is fixed, while clutch-plate 232 is moved to clutch bolt 241, and is compressed, and opens machine.This embodiment ensure that motor-driven
Process can pump out liquid at the very start.
In sum, the adjustable plunger displacement pump of the discharge capacity of the present invention, has the advantages that：The present invention is existing by changing
Technology cam drive piston reciprocation motion mode, a kind of adjustable eccentric adjusting seat is provided, can precise control each
The discharge rate of working cycles, and installed additional in plunger seal problem multiple sealing rings and formed multiple connect bakie, not only solve
The certainly sealing problem of valve body, and lubricating oil can be stored, improve the using effect of the pump housing and improve service life.
So, the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
Above-described embodiment only principle of the illustrative present invention and its effect, not for the restriction present invention.Any ripe
The personage for knowing this technology all can carry out modifications and changes without prejudice under the spirit and the scope of the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete with institute under technological thought without departing from disclosed spirit such as
All equivalent modifications for becoming or change, must be covered by the claim of the present invention.
Claims (11)
1. a kind of plunger displacement pump, it is characterised in that include：
Valve body, the left and right of the valve body are respectively arranged at two ends with oil-in, oil-out, and the valve body is provided with and oil-in, fuel-displaced
The control oil-in and oil-out is provided with fluid passage between the fluid passage of mouth connection, the oil-in and oil-out
The flow-limiting valve of opening and closing, is provided with the closed hydraulic cavities connected with the fluid passage, sets in the hydraulic cavities on the valve body
There is plunger, the top end of the valve body is provided with the hand piston extended to inside the hydraulic cavities, the valve body is provided with limiting locking
Device；The hand piston is provided with sealing ring；
Driving section is driven, including connecting rod and adjustment seat, the small end is articulated with the plunger bottom, the connecting rod lower end hinge
It is connected in the adjustment seat；
Discharge capacity adjustment portion, is arranged in the adjustment seat, the adjustable regulating block in the position including being embedded in the adjustment seat, solid
The jointed shaft hinged for connecting rod lower end and the adjustment seat being connected on the regulating block, the regulation for adjusting hinged shaft position are driven
Moving part.
2. the plunger displacement pump wanted described in 1 is asked according to right, it is characterised in that：The valve body includes main valve body and main valve body both sides
Left and right valve body, is respectively equipped with oil-in, oil-out on the left and right valve body.
3. plunger displacement pump according to claim 1, it is characterised in that：The regulating block is T-shaped slide block.
4. plunger displacement pump according to claim 1, it is characterised in that：The regulation actuator is adjusting screw, the regulation
Screw is threadeded with the regulating block.
5. plunger displacement pump according to claim 1, it is characterised in that：Pointer is connected with the jointed shaft, the adjustment seat
It is provided with needle dial corresponding with the pointer.
6. plunger displacement pump according to claim 1, it is characterised in that：The jointed shaft is one to be connected in the connection on regulating block
Bar.
7. plunger displacement pump according to claim 1, it is characterised in that：The limiting locking device includes the limit on hand piston
Position groove and the stopper slot lock-screw for coordinating, the limited block being placed in above valve body.
8. plunger displacement pump according to claim 1, it is characterised in that：Flow-limiting valve on the fluid passage is Unidirectional flow-limiting
Valve, including import flow-limiting valve, outlet flow-limiting valve；The import flow-limiting valve includes inlet spool and import stage clip, the outlet limit
Stream valve includes outlet valve core and outlet stage clip.
9. plunger displacement pump according to claim 1, it is characterised in that：The junction difference of the connecting rod and plunger and connecting rod
It is provided with oscillating bearing.
10. plunger displacement pump according to claim 1, it is characterised in that：The adjustment seat is by a shaft coupling and input shaft phase
Connection, with clutch-plate on the adjustment seat periphery.
11. plunger displacement pumps according to any one of claim 1 to 10, it is characterised in that：The plunger is sealed with three
Circle, forms two between three sealing rings and connects bakie.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310428483.0A CN104454502B (en) | 2013-09-18 | 2013-09-18 | Plunger displacement pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310428483.0A CN104454502B (en) | 2013-09-18 | 2013-09-18 | Plunger displacement pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104454502A CN104454502A (en) | 2015-03-25 |
| CN104454502B true CN104454502B (en) | 2017-03-08 |
Family
ID=52901095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310428483.0A Active CN104454502B (en) | 2013-09-18 | 2013-09-18 | Plunger displacement pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104454502B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446178A (en) * | 2021-06-21 | 2021-09-28 | 北京华德液压工业集团有限责任公司 | Axial plunger pump plunger and axial plunger pump |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4830589A (en) * | 1988-09-08 | 1989-05-16 | Hypro Corp. | Variable stroke positive displacement pump |
| CN2106908U (en) * | 1991-06-15 | 1992-06-10 | 郑安犁 | Reciprocating metering medicine-feeding pump without crankshaft mechanism |
| CN2645837Y (en) * | 2003-09-29 | 2004-10-06 | 天津第一机床总厂 | Drive mechanism of large-scale gear shaper for processing deep hole and inner tooth |
| CN2665399Y (en) * | 2003-12-10 | 2004-12-22 | 上海理日科技发展有限公司 | Trace quantity metering automatic loading device |
| CN2711412Y (en) * | 2004-06-10 | 2005-07-20 | 欧学翠 | Plunger pump with balance in valve |
| CN201760814U (en) * | 2010-04-21 | 2011-03-16 | 中国人民解放军国防科学技术大学 | Planetary-wheel numerically-controlled grinding and polishing removal-function generating device |
| CN202659465U (en) * | 2012-06-02 | 2013-01-09 | 范学齐 | Flow-adjustable hydraulic diaphragm metering pump |
| CN103133512A (en) * | 2013-03-22 | 2013-06-05 | 江苏富天江电子电器有限公司 | Eccentric wheel with adjustable eccentric distance |
-
2013
- 2013-09-18 CN CN201310428483.0A patent/CN104454502B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4830589A (en) * | 1988-09-08 | 1989-05-16 | Hypro Corp. | Variable stroke positive displacement pump |
| CN2106908U (en) * | 1991-06-15 | 1992-06-10 | 郑安犁 | Reciprocating metering medicine-feeding pump without crankshaft mechanism |
| CN2645837Y (en) * | 2003-09-29 | 2004-10-06 | 天津第一机床总厂 | Drive mechanism of large-scale gear shaper for processing deep hole and inner tooth |
| CN2665399Y (en) * | 2003-12-10 | 2004-12-22 | 上海理日科技发展有限公司 | Trace quantity metering automatic loading device |
| CN2711412Y (en) * | 2004-06-10 | 2005-07-20 | 欧学翠 | Plunger pump with balance in valve |
| CN201760814U (en) * | 2010-04-21 | 2011-03-16 | 中国人民解放军国防科学技术大学 | Planetary-wheel numerically-controlled grinding and polishing removal-function generating device |
| CN202659465U (en) * | 2012-06-02 | 2013-01-09 | 范学齐 | Flow-adjustable hydraulic diaphragm metering pump |
| CN103133512A (en) * | 2013-03-22 | 2013-06-05 | 江苏富天江电子电器有限公司 | Eccentric wheel with adjustable eccentric distance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104454502A (en) | 2015-03-25 |
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