CN104481834B - A kind of plunger pump - Google Patents
A kind of plunger pump Download PDFInfo
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- CN104481834B CN104481834B CN201410647137.6A CN201410647137A CN104481834B CN 104481834 B CN104481834 B CN 104481834B CN 201410647137 A CN201410647137 A CN 201410647137A CN 104481834 B CN104481834 B CN 104481834B
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- plunger
- partition wall
- pump housing
- pump
- mounting cylinder
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Abstract
The invention discloses a kind of plunger pump, belong to fluid pump technical field, it comprises the pump housing, a partition wall is provided with near material feeding mouth in the described pump housing, a mounting cylinder is provided with in the pump housing between partition wall and plunger, mounting cylinder is rotatablely equipped with a transmission shaft, be positioned at install cavity transmission shaft on be installed with a rolling disc, a floating disc is provided with between partition wall and rolling disc, transmission shaft is installed with an impeller, feeding-passage is formed between adjacent two blades, passage gaps is formed between floating disc and rolling disc, mounting cylinder is provided with some through holes corresponding with passage gaps position, one end that transmission shaft passes mounting cylinder connects plunger, and the outer surface of mounting cylinder is slidably fitted with sleeve, and sleeve connects plunger by a connecting rod, the pump housing is provided with a discharge port, and discharge port connects the ball valve that is controlled by plunger.The invention solves the technical problem that current plunger pump intake is not enough, leakage rate is excessive, be widely used in fluid continus convergence.
Description
Technical field
The present invention relates to a kind of pump, relate more particularly to a kind of plunger pump, belong to fluid pump technical field.
Background technique
Plunger pump is an important device of hydraulic system, and it relies on plunger to-and-fro motion in cylinder body, makes the volume of seal operation cavity volume change to realize the function such as oil suction, force feed.The advantage such as have that rated pressure is high, compact structure, efficiency are high due to plunger pump and Flow-rate adjustment is convenient, is widely used in the occasion that high pressure, large discharge and flow need to regulate, in such as hydraulic press, engineering machinery and boats and ships.
Traditional plunger pump is the one of reciprocating pump, belongs to volume pump, and its plunger drives by the eccentric rotary of pump shaft, to-and-fro motion, and it sucks and expulsion valve is all one-way valve.When drawing outside plunger, working room's internal pressure reduces, and outlet valve cuts out, and during lower than inlet pressure, inlet valve is opened, and liquid enters; When pushing away in plunger, chamber pressure raises, and inlet valve cuts out, and during higher than outlet pressure, outlet valve is opened, and liquid is discharged.When transmission shaft drives cylinder body to rotate, plunger pulls out or pushes back by swash plate from cylinder body, completes suction oil process.Fluid in the working volumes that plunger and cylinder holes form is communicated with the suction of pump, oil-discharging cavity respectively by oil distribution casing.Stroking mechanism is used for changing the inclination angle of swash plate, can change pump delivery by regulating the inclination angle of swash plate.
The major defect of current plunger pump is: (1) intake is not enough, and reason is the excessive or repairing quantity not sufficient of the resistance on inlet line, and the rotating speed as pump is excessive, and in fuel tank, liquid level is too low, and oil inlet pipe leaks gas, oil purifier blocking etc.; (2) leakage rate is excessive, and reason is the excesssive gap of pump, and poor sealing causes, if oil distribution casing is by the scuffing such as metal fragment, iron filings, and end face leakage of oil; One-way valve sealing surface in stroking mechanism coordinates bad, and the supporting surface of the pump housing and oil distribution casing has sand holes or grinds trace etc., can by checking that the foreign matter mixed in hydraulic oil in the pump housing differentiates the impaired position of pump.
Therefore, for a kind of new plunger pump of exploitation, not only there is urgent researching value, also there are good economic benefit and commercial Application potentiality, this just the power place that is accomplished of the present invention and basis lean on.
Summary of the invention
In order to overcome the defect of above-mentioned pointed existing plunger pump, the present inventor, to this has been further investigation, after having paid a large amount of creative work, thus completes the present invention.
Specifically, technical problem to be solved by this invention is: provide a kind of plunger pump, the technical problem that current plunger pump intake is not enough to solve, leakage rate is excessive.
For solving the problems of the technologies described above, technological scheme of the present invention is: provide a kind of plunger pump, described plunger pump comprises the pump housing, described pump housing one end is provided with material feeding mouth, the other end is slidably fitted with a plunger, a partition wall is provided with near described material feeding mouth in the described pump housing, a mounting cylinder is provided with in the described pump housing between described partition wall and plunger, closed installation cavity is formed between described mounting cylinder and partition wall, described mounting cylinder is rotatablely equipped with a transmission shaft, described transmission shaft runs through described installation cavity, described transmission shaft one end passes described mounting cylinder, the other end passes described partition wall, the described transmission shaft being positioned at described installation cavity is installed with a rolling disc, between described partition wall and rolling disc, a floating disc is provided with in described installation cavity, a platen is provided with between described floating disc and partition wall, described platen is provided with adjustment stud, described adjustment stud passes described partition wall and is threaded with described partition wall, some Compress Springs are provided with between described platen and floating disc, under described Compress Spring effect, described floating disc and described rolling disc end face offset, described transmission shaft is installed with an impeller, described impeller is through described floating disc and described partition wall, on described impeller, annular array has the blade of some radial arrangement, feeding-passage is formed between blade described in adjacent two, described feeding-passage is connected with described material feeding mouth, passage gaps is formed between described floating disc and rolling disc, described mounting cylinder is provided with the corresponding through hole in some and described passage gaps position, described through hole is connected with described feeding-passage by described passage gaps, one end that described transmission shaft passes described mounting cylinder drives the power conversion mechanism of described drive axis to connect described plunger by the to-and-fro motion of described plunger being converted to, the outer surface of described mounting cylinder is slidably fitted with one for the sleeve of through hole described in shutoff, and described sleeve connects described plunger by a connecting rod, the described pump housing between described mounting cylinder and plunger is provided with a discharge port, and described discharge port connects the ball valve that is controlled by described plunger.
In described plunger pump of the present invention, improve as one, described power conversion mechanism comprises the second installation shaft that the first installation shaft be fixedly installed on the described pump housing is installed on the described pump housing with rotation, described first installation shaft and the second installation shaft be arranged in parallel, the end of described first installation shaft is rotatablely equipped with driving gear, described second installation shaft is installed with the driven gear be meshed with described driving gear, described second installation shaft to be in transmission connection described transmission shaft by bevel gear pair; Connecting rod is provided with between described driving gear and plunger.
In described plunger pump of the present invention, as further improvement, the top of described impeller is provided with a closure plate, and the end of all described blades all relies on described closure plate.
In described plunger pump of the present invention, as further improvement, the edge of described closure plate is provided with an annular protrusion, and all described blades all retrain and are installed in described annular protrusion.
In described plunger pump of the present invention, as further improvement, the described pump housing is provided with a back flushing interface, and described back flushing interface is arranged near described discharge port.
In described plunger pump of the present invention, as further improvement, the described pump housing is provided with a slag exhausting mouth, and described slag exhausting mouth is between described partition wall and floating disc.
In described plunger pump of the present invention, as further improvement, described ball valve comprises the valve body be fixedly installed on the described pump housing, is provided with a ball core in described valve body, and described ball core is provided with circulation passage; Described valve body fixedly mounts a rotary valve, installation one gear shaft is rotated in described rotary valve, described gear shaft and described ball core are in transmission connection by a driving pin, and in described rotary valve, vertical described gear shaft is provided with a tooth bar, and described tooth bar connects described plunger by screw rod.
After have employed technique scheme, plunger pump of the present invention achieves many excellent effect, such as:
(1) because the circumferential array of mounting cylinder is distributed with some through holes, compared with sucking with traditional one-way valve, substantially increase charging area, thus substantially increase the intake of plunger pump, owing to forming passage gaps between floating disc and rolling disc, and the size of passage gaps can be adjusted by the pretightening force of Compress Spring, decrease large granular materials blocking phenomenon, meet the circulate of different material, and use the charging of this structure, when plunger process promotes the starting stage of material discharge, when sleeve does not also have a complete shutoff through hole, have partial material to be refluxed by through hole, the high pressure circulation of this part backflow can carry out back flush to passage gaps and feeding-passage, some large particles or other impurity are gone out, avoid the circulation blocking fluid, further increase the intake of plunger pump, the traditional suction of this structural change and discharge the structure all using one-way valve, usability is more reliable, is applicable to non-maintaining working continuously.
(2) because the edge of closure plate is provided with an annular protrusion, all blades all retrain and are installed in annular protrusion, effectively prevent blade and depart from impeller under centrifugal action, add the structural strength of impeller, improve the working life of impeller.
(3) because the pump housing is provided with a back flushing interface, when needing cleaning, back flushing interface can be connected pressurized air or pressure water source, suck the opposite direction of discharging material according to plunger pump the impurity in plunger pump is removed, cleaning need not be removed, easy to use, be especially applicable to the maintenance of the plunger pump of long-time continuous operation.
(4) be provided with slag exhausting mouth between partition wall and floating disc, under making centrifugal action, isolated large granular materials can discharge plunger pump smoothly.
(5) because the ball core of ball valve connects gear shaft by driving pin, and gear shaft realizes interlock by tooth bar, tooth bar connects plunger by screw rod, by the length of screw rod can regulating tooth wheel shaft to rotate the frequency of 90 degree consistent with the reciprocating frequence of plunger, thus realize the intermittent conveying of plunger pump and circulate.
(6) this plunger pump instead of traditional one-way valve structures completely, avoids the defect that one-way valve in use easily occurs to reveal, but uses ball valve and tube-in-tube structure more reliably, has larger use value and meaning.
As mentioned above, the invention provides a kind of plunger pump, this plunger pump has multiple premium properties, thus can be applicable to, in multiple specific field, to have good using value and industrial prospect.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention plunger pump;
Fig. 2 is the controlled structures figure of ball valve in embodiment of the present invention plunger pump;
Fig. 3 is the sectional structure schematic diagram of B-B in Fig. 2;
Fig. 4 is the cutaway view Amplified image of A-A in Fig. 1;
Wherein, in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, each number designation refers to following concrete meaning, element and/or parts respectively.
In figure: 1, upper pump casing, 2, platen, 3, Compress Spring, 4, discharge port, 5, ball valve, 501, valve body, 502, ball core, 503, circulation passage, 504, gear shaft, 505, screw rod, 506, tooth bar, 507, driving pin, 508, rotary valve, 6, through hole, 7, sleeve, 8, back flushing interface, 9, lower pump body, 10, connecting rod, 11, plunger, 12, transmission shaft, 13, bevel gear pair, 14, connecting rod, 15, second installation shaft, 16, first installation shaft, 17, driving gear, 18, driven gear, 19, rolling disc, 20, annular groove, 21, passage gaps, 22, floating disc, 23, mounting cylinder, 24, slag exhausting mouth, 25, partition wall, 26, adjustment stud, 27, impeller, 2701, closure plate, 2702, wheel case, 2703, blade, 2704, annular protrusion, 28, material feeding mouth, 29, feeding-passage.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.But the purposes of these exemplary mode of executions and object are only used for exemplifying the present invention, not any type of any restriction is formed to real protection scope of the present invention, more non-protection scope of the present invention is confined to this.
As Fig. 1 and Fig. 4 jointly shown in, a kind of plunger pump provided by the present invention, comprise the pump housing, the pump housing is straight-tube shape structure, pump housing one end is provided with material feeding mouth 28, the other end is slidably fitted with a plunger 11, plunger 11 connects driver element and does linear reciprocating motion, a partition wall 25 is provided with near material feeding mouth 28 in the pump housing, a mounting cylinder 23 is provided with in the pump housing between partition wall 25 and plunger 11, closed installation cavity is formed between mounting cylinder 23 and partition wall 25, mounting cylinder 23 is rotatablely equipped with a transmission shaft 12, transmission shaft 12 runs through installation cavity, transmission shaft 12 one end passes mounting cylinder 23, the other end passes partition wall 25, be positioned at install cavity transmission shaft 12 on be installed with a rolling disc 19, rolling disc 19 is provided with some the annular grooves 20 being the center of circle with rolling disc 19 center, the effect of annular groove 20 is receiver portion impurity, avoid impurity by passage gaps 21, install in cavity between partition wall 25 and rolling disc 19, be provided with a floating disc 22, a platen 2 is provided with between floating disc 22 and partition wall 25, platen 2 is provided with adjustment stud 26, adjustment stud 26 passes partition wall 25 and is threaded with partition wall 25, some Compress Springs 3 are provided with between platen 2 and floating disc 22, under Compress Spring 3 acts on, floating disc 22 and rolling disc 19 end face offset, when there being large particle to pass through, Compress Spring 3 can be caused to compress, large particle is just contained in annular groove 20, now Compress Spring 3 just return, continue to keep original passage gaps 21, large particle in annular groove 20 is then difficult to circulate gap 21 again, transmission shaft 12 is installed with an impeller 27, impeller 27 is through floating disc 22 and partition wall 25, on impeller 27, annular array has the blade 2703 of some radial arrangement, feeding-passage 29 is formed between adjacent two blades 2703, feeding-passage 29 is connected with material feeding mouth 28, passage gaps 21 is formed between floating disc 22 and rolling disc 19, mounting cylinder 23 is provided with some through holes 6 corresponding with passage gaps 21 position, through hole 6 is connected with feeding-passage 29 by passage gaps 21, under the effect of impeller 27, large granular materials is difficult to enter in feeding-passage 29, one barrier is played at material feeding mouth 28, one end that transmission shaft 12 passes mounting cylinder 23 connects plunger 11 by the to-and-fro motion of plunger 11 being converted to the power conversion mechanism driving transmission shaft 12 to rotate, the outer surface of mounting cylinder 23 is slidably fitted with one for the sleeve 7 of shutoff through hole 6, and sleeve 7 connects plunger 11 by a connecting rod 10, the pump housing between mounting cylinder 23 and plunger 11 is provided with a discharge port 4, and discharge port 4 connects the ball valve 5 that is controlled by plunger 11, changes the structure of traditional use one-way valve, overcomes the defect in one-way valve using process.
Power conversion mechanism comprises the second installation shaft 15 that the first installation shaft 16 be fixedly installed on the pump housing is installed on the pump housing with rotation, first installation shaft 16 and the second installation shaft 15 be arranged in parallel, the end of the first installation shaft 16 is rotatablely equipped with driving gear 17, second installation shaft 15 is installed with the driven gear 18 be meshed with driving gear 17, second installation shaft 15 to be in transmission connection transmission shaft 12 by bevel gear pair 13, concrete, second installation shaft 15 fixes a drive bevel gear, transmission shaft 12 is fixed a driven wheel of differential, the rotation of the second installation shaft 15 is converted to the rotation of transmission shaft 12, be provided with connecting rod 14 between driving gear 17 and plunger 11, connecting rod 14 is applied widely in motor and daily life, and those skilled in the art can choice for use, does not repeat them here.
Impeller 27 comprises the wheel case 2702 be set on transmission shaft 12, be in transmission connection by key between wheel case 2702 and transmission shaft 12, the top of impeller 27 is provided with a closure plate 2701, this closure plate 2701 is positioned at the end of wheel case 2702, the end of all blades 2703 all relies on closure plate 2701, the edge of closure plate 2701 is provided with an annular protrusion 2704, all blades 2703 all retrain and are installed in annular protrusion 2704, inventor is when making impeller 27, in order to ensure its dynamic balancing, wheel case 2702 processes the some draw-in grooves identical with blade 2703 thickness, and corresponding position also processes quantity and the identical some slots of width on closure plate 2701, blade 2703 is just inserted in draw-in groove and slot, blade 2703 is fixed between closure plate 2701 and wheel case 2702 by the mode re-using spot welding.When impeller 27 does dynamic balance check, then use weighting procedure to correct, increase solder joint in scarce heavy position, the soundness of blade 2703 can either be ensured, its dynamic balancing can be ensured again.
The pump housing is provided with a back flushing interface 8, back flushing interface 8 is arranged near discharge port 4, when needing cleaning, back flushing interface 8 can be connected pressurized air or pressure water source, suck the opposite direction of discharging material according to plunger pump the impurity in plunger pump is removed, need not cleaning be removed, easy to use, be especially applicable to the maintenance of the plunger pump of long-time continuous operation.
The pump housing is provided with a slag exhausting mouth 24, slag exhausting mouth 24 between partition wall 25 and floating disc 22, when normally working, slag exhausting mouth 24 uses plug to block, when carrying out adverse current backwash, and shutoff discharge port 4, open slag exhausting mouth 24, the impurity between partition wall 25 and floating disc 22 is discharged.
In concrete practice process, the pump housing is divided into upper pump casing 1 and lower pump body 9 by inventor, and material feeding mouth 28 is positioned on upper pump casing 1, and plunger 11 is slidably mounted on lower pump body 9, and mounting cylinder 23 is arranged between upper pump casing 1 and lower pump body 9, is convenient to installation and maintenance.
As Fig. 2 and Fig. 3 jointly shown in, ball valve 5 with the pass of plunger 11 is:
Ball valve 5 comprises the valve body 501 be fixedly installed on the pump housing, and be provided with a ball core 502 in valve body 501, ball core 502 is provided with circulation passage 503, valve body 501 fixedly mounts a rotary valve 508, installation one gear shaft 504 is rotated in rotary valve 508, gear shaft 504 and ball core 502 are in transmission connection by a driving pin 507, in rotary valve 508, vertical teeth wheel shaft 504 is provided with a tooth bar 506, tooth bar 506 is slidably mounted in rotary valve 508, tooth bar 506 is meshed with gear shaft 504, tooth bar 506 connects plunger 11 by screw rod 505, concrete, screw rod 505 is connected with the plunger rod of plunger 11, to-and-fro motion band carry-over bar 506 to-and-fro motion of plunger 11, thus driven gear axle 504 carrys out back rotation, gear shaft 504 drives ball core 502 by driving pin 507, open or close circulation passage 503, thus the intermittence achieving material exports.The reciprocating stroke of plunger 11 just realizes the opening and closing of circulation passage 503, its angular adjustment can by the length adjustment of screw rod 505, to change the engaging position of tooth bar 506 and gear shaft 504, stroke is associated and can be adjusted by the number of teeth, those skilled in the art know this technology, do not repeat them here.
Its working procedure is as follows:
Material enters upper pump casing 1 by material feeding mouth 28, plunger 11 to-and-fro motion, material is sucked and discharges, concrete action is: during backhaul, plunger 11 moves downward, and form negative pressure in plunger pump, plunger 11 pulls connecting rod 10 to be with moving sleeve 7 slide downward, when the top edge of sleeve 7 moves down into below through hole 6, material just enters in plunger cavity via material feeding mouth 28, feeding-passage 29, passage gaps 21 and through hole 6; During process, starting stage, when the top edge of sleeve 7 does not also have a complete shutoff through hole 6, have partial material to be refluxed by through hole 6, the high pressure circulation of this part backflow can carry out back flush to passage gaps 21 and feeding-passage 29, when the top edge of sleeve 7 blocks through hole 6 completely, move along with on plunger 11, material is discharged by ball valve 5.Under the effect of connecting rod 14, the to-and-fro motion of plunger 11 drives driving gear 17 to rotate, driving gear 17 drives driven gear 18 to rotate, thus drive transmission shaft 12 to rotate always, and, rotational velocity can be adjusted by the number of teeth of driving gear 17 with driven gear, those skilled in the art needed for material centrifugal force speed from Row sum-equal matrix, first material screens in material feeding mouth 28 position by the centrifugal force of impeller 27, large granular materials discharges material feeding mouth 28, enter a small amount of large particle of feeding-passage 29 in the rotation process of blade 2703, continue the power that is centrifuged and get rid of inwall to mounting cylinder 23, fluid granularity eventually through passage gaps 21 is little, impurity is few, both ensure that the quality of discharging material, do not affect again the use of ball valve 5, therefore, this mechanism is especially applicable to the environment of working continuously, do not need frequent maintenance, efficiency is high.
Should be appreciated that the purposes of these embodiments is only not intended to for illustration of the present invention limit the scope of the invention.In addition; also should understand; after having read technology contents of the present invention, those skilled in the art can make various change, amendment and/or modification to the present invention, and these all equivalent form of values fall within the protection domain that the application's appended claims limits equally.
Claims (7)
1. a plunger pump, comprise the pump housing, described pump housing one end is provided with material feeding mouth, the other end is slidably fitted with a plunger, it is characterized in that: in the described pump housing, be provided with a partition wall near described material feeding mouth, a mounting cylinder is provided with in the described pump housing between described partition wall and plunger, closed installation cavity is formed between described mounting cylinder and partition wall, described mounting cylinder is rotatablely equipped with a transmission shaft, described transmission shaft runs through described installation cavity, described transmission shaft one end passes described mounting cylinder, the other end passes described partition wall, the described transmission shaft being positioned at described installation cavity is installed with a rolling disc, between described partition wall and rolling disc, a floating disc is provided with in described installation cavity, a platen is provided with between described floating disc and partition wall, described platen is provided with adjustment stud, described adjustment stud passes described partition wall and is threaded with described partition wall, some Compress Springs are provided with between described platen and floating disc, under described Compress Spring effect, described floating disc and described rolling disc end face offset, described transmission shaft is installed with an impeller, described impeller is through described floating disc and described partition wall, on described impeller, annular array has the blade of some radial arrangement, feeding-passage is formed between blade described in adjacent two, described feeding-passage is connected with described material feeding mouth, passage gaps is formed between described floating disc and rolling disc, described mounting cylinder is provided with the corresponding through hole in some and described passage gaps position, described through hole is connected with described feeding-passage by described passage gaps, one end that described transmission shaft passes described mounting cylinder drives the power conversion mechanism of described drive axis to connect described plunger by the to-and-fro motion of described plunger being converted to, the outer surface of described mounting cylinder is slidably fitted with one for the sleeve of through hole described in shutoff, and described sleeve connects described plunger by a connecting rod, the described pump housing between described mounting cylinder and plunger is provided with a discharge port, and described discharge port connects the ball valve that is controlled by described plunger.
2. plunger pump as claimed in claim 1, it is characterized in that: described power conversion mechanism comprises the second installation shaft that the first installation shaft be fixedly installed on the described pump housing is installed on the described pump housing with rotation, described first installation shaft and the second installation shaft be arranged in parallel, the end of described first installation shaft is rotatablely equipped with driving gear, described second installation shaft is installed with the driven gear be meshed with described driving gear, described second installation shaft to be in transmission connection described transmission shaft by bevel gear pair; Connecting rod is provided with between described driving gear and plunger.
3. plunger pump as claimed in claim 1, it is characterized in that: the top of described impeller is provided with a closure plate, the end of all described blades all relies on described closure plate.
4. plunger pump as claimed in claim 3, it is characterized in that: the edge of described closure plate is provided with an annular protrusion, all described blades all retrain and are installed in described annular protrusion.
5. the plunger pump as described in any one of claim 1-4, is characterized in that: the described pump housing is provided with a back flushing interface, and described back flushing interface is arranged near described discharge port.
6. the plunger pump as described in any one of claim 1-4, is characterized in that: the described pump housing is provided with a slag exhausting mouth, and described slag exhausting mouth is between described partition wall and floating disc.
7. the plunger pump as described in any one of claim 1-4, is characterized in that: described ball valve comprises the valve body be fixedly installed on the described pump housing, is provided with a ball core in described valve body, and described ball core is provided with circulation passage; Described valve body fixedly mounts a rotary valve, installation one gear shaft is rotated in described rotary valve, described gear shaft and described ball core are in transmission connection by a driving pin, and in described rotary valve, vertical described gear shaft is provided with a tooth bar, and described tooth bar connects described plunger by screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410647137.6A CN104481834B (en) | 2014-11-14 | 2014-11-14 | A kind of plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410647137.6A CN104481834B (en) | 2014-11-14 | 2014-11-14 | A kind of plunger pump |
Publications (2)
| Publication Number | Publication Date |
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| CN104481834A CN104481834A (en) | 2015-04-01 |
| CN104481834B true CN104481834B (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410647137.6A Active CN104481834B (en) | 2014-11-14 | 2014-11-14 | A kind of plunger pump |
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| CN (1) | CN104481834B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105756922B (en) * | 2016-04-11 | 2018-08-14 | 长沙万工机器人科技有限公司 | A kind of pump body structure suitable for multiple types fluent material High voltage output |
| CN110092595B (en) * | 2019-06-03 | 2023-09-29 | 马鞍山市润祥复合材料股份有限公司 | Glass fiber infiltration device capable of improving infiltration quality |
| CN112354837B (en) * | 2020-10-09 | 2022-03-18 | 重庆工程职业技术学院 | Kitchen waste sorting assembly line |
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| GB542720A (en) * | 1940-02-09 | 1942-01-23 | British Thomson Houston Co Ltd | Improvements in hydraulic operating devices |
| GB590199A (en) * | 1944-12-19 | 1947-07-10 | Fawcett Preston & Co Ltd | Improvements in swash plate pumps for liquids |
| CN2183456Y (en) * | 1993-05-25 | 1994-11-23 | 王建政 | Double-action pump |
| EP0612378B1 (en) * | 1991-11-12 | 1995-12-06 | Elektro-Mechanik Gmbh | Electrohydraulic machine |
| CN2313083Y (en) * | 1997-09-08 | 1999-04-07 | 原阳县高新技术试验厂 | Self-suction centrifugal pump |
| CN201071792Y (en) * | 2007-07-07 | 2008-06-11 | 杨青山 | Hydraulic water-pumping machine |
-
2014
- 2014-11-14 CN CN201410647137.6A patent/CN104481834B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB542720A (en) * | 1940-02-09 | 1942-01-23 | British Thomson Houston Co Ltd | Improvements in hydraulic operating devices |
| GB590199A (en) * | 1944-12-19 | 1947-07-10 | Fawcett Preston & Co Ltd | Improvements in swash plate pumps for liquids |
| EP0612378B1 (en) * | 1991-11-12 | 1995-12-06 | Elektro-Mechanik Gmbh | Electrohydraulic machine |
| CN2183456Y (en) * | 1993-05-25 | 1994-11-23 | 王建政 | Double-action pump |
| CN2313083Y (en) * | 1997-09-08 | 1999-04-07 | 原阳县高新技术试验厂 | Self-suction centrifugal pump |
| CN201071792Y (en) * | 2007-07-07 | 2008-06-11 | 杨青山 | Hydraulic water-pumping machine |
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