CN105134582A - Novel plunger pump - Google Patents
Novel plunger pump Download PDFInfo
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- CN105134582A CN105134582A CN201510558975.0A CN201510558975A CN105134582A CN 105134582 A CN105134582 A CN 105134582A CN 201510558975 A CN201510558975 A CN 201510558975A CN 105134582 A CN105134582 A CN 105134582A
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- water cooling
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- cooling box
- water
- plunger pump
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Abstract
The invention belongs to the field of liquid pumps, and particularly provides a novel plunger pump. The novel plunger pump comprises a crank case and a water cooling box; the water cooling box is arranged at the bottom of the outer surface of the crank case and provided with a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe are both communicated with the water cooling box, and the water outlet pipe is communicated with a water inlet of the crank case. According to the novel plunger pump, the problem that in an existing plunger pump, the plunger pump is prone to being damaged due to the fact that the heat dissipation effect is not good is solved.
Description
Technical field
The present invention relates to liquor pump field, in particular to a kind of Novel plunger pump.
Background technique
Plunger pump is the to-and-fro motion driven by the eccentric rotary of bent axle, and it sucks and discharges is all one-way valve, and one-way valve and water seal form a closed space.When drawing outside plunger, the atmospheric pressure in working room reduces, and outlet valve cuts out, and working room's internal pressure is lower than atmospheric pressure, and this is that inlet valve is opened, and liquid enters working room; When pushing away in plunger, chamber pressure is greater than external atmosphere pressure, and this is that inlet valve cuts out, and outlet valve is opened, and liquid is discharged, and enclosed by crankshaft rotating one like this, plunger pump completes a complete single working cycle process.
When carrying out drive plunger pump work by the power such as petrol engine or motor, bent axle just with supporting power mechanism synchronously rotary work at high speed in plunger pump, the to-and-fro motion of plunger high speed is made by linkage mechanism, amount of heat will be produced during this, prior art be by use aluminum alloy material as the material of crankcase and design on crankcase a lot of radiating fin eliminate these impact, but sometimes because processing and assembling error probability and other side reason, plunger pump easily generates heat sometimes to more than 100 degrees Celsius, make oil sealing and see oily window to damage, oil leak, cause plunger pump to damage to happen occasionally, on crankcase, radiating fin has been grown at plunger pump service time, also easily dirt is accumulated, not easy-clear, affect radiating effect.Therefore, it is bad to there is radiating effect in existing plunger pump, easily causes the problem that plunger pump damages.
Summary of the invention
The object of the present invention is to provide a kind of Novel plunger pump, bad with the radiating effect improving the existence of existing plunger pump, easily cause the problem that plunger pump damages.
The present invention is achieved in that
A kind of Novel plunger pump, comprise crankcase, water cooling box, described water cooling box is arranged at the bottom of the outer surface of described crankcase, described water cooling box is provided with intake pipe, outlet pipe, described intake pipe, outlet pipe are all communicated with described water cooling box, and described outlet pipe is communicated with the water intake of crankcase.
Make into first through water cooling box and crankcase generation heat exchange by crankcase water directly being entered plunger pump, the heat produced when just can continuously take away crankcase work, and enter crankcase again through the water of heat exchange, the time contacted with bent axle when water is discharged is shorter, and the temperature of water is still lower than the temperature in crankcase, thus very little to the variable effect of crankcase temperature through the water of crankcase, make whole process serve the effect of water-cooled cooling to crankcase.
Novel plunger pump described above, preferably, described water cooling box comprises upper box, lower box, described upper box is an inverted groove, the top of described upper box is the bottom of the outer surface of described crankcase, described lower box is the end cap coordinated with upper box, and described upper box is screwed with described lower box and is connected.
Water is in long-term flow process, contact for a long time with the inside of water cooling box, water cooling box is generally metal material, material in water and water is easily oxidized water cooling box, being arranged so that water cooling box to be dismantled of upper box and lower box is come, at set intervals, can clear up its inside and repair.Be screwed connection, make to connect more convenient, also can make upper box and lower box linking together closely.
Novel plunger pump described above, preferably, described water cooling box is rectangular structure, and the water intake of described water cooling box, water outlet are arranged on two diagonal angles of the bottom surface of described lower box respectively.
Water cooling box plays the effect of heat exchange cooling, therefore need the waiting time of current in water cooling box longer, heat exchange effect is just better, the glassware for drinking water that water intake and the diagonal angle of water outlet are arranged to enter water cooling box has the more sufficient waiting time, arrange water intake, water outlet in the bottom surface of lower box, the installation of more convenient processing and pipeline connects.
Novel plunger pump described above, preferably, described intake pipe, outlet pipe are all by the inner space of pipeline connecting bend and described water cooling box, and described pipeline connecting bend is threaded with described lower box.
Pipeline connecting bend makes with being threaded between lower box, the sealing of whole water cooling box is relatively good, and water not easily leaks from joint, and pipeline connecting bend is convenient to and pipeline and water intake, being connected of water outlet, and pipeline need not be bent, thus make connection fast more convenient.
Novel plunger pump described above, preferably, the inside of described water cooling box is provided with guide channel, and the entrance location of described guide channel is corresponding with the water inlet position of described water cooling box, and the exit position of described guide channel is corresponding with the water outlet position of described water cooling box.
The direction of current can be controlled by guide channel, make the time lengthening that current flow in water cooling box, thus heat exchange can be carried out for a long time, take away heat as much as possible.Make the cooling effect of water cooling box to crankcase better.The entrance location of guide channel, the setting of exit position, make the waiting time of current in water cooling box reach the longest, effect is best.
Novel plunger pump described above, preferably, the two relative inwalls of described water cooling box are provided with diaphragm, and the inner chamber of water cooling box is separated to form bending guide channel by described multiple diaphragm.
Can form the guide channel of bending by arranging diaphragm easily, thus extend the flowing time of water in water cooling box, take away more heat, the structure of diaphragm is simple simultaneously, is convenient to machine shaping.
Novel plunger pump described above, preferably, is provided with seal washer between described upper box and described lower box.
By arranging seal washer, make the connection between upper box and lower box more tight, its better tightness, thus the flowing that current are long-term in water cooling box, can not leak from joint.
Novel plunger pump described above, preferably, described upper box and described crankcase one-body molded.Be convenient to time processing shaping, can not there is soldering point, its seal can be better, and, relatively weld, the situation that more difficult being corroded in joint and occurring is leaked.
Novel plunger pump described above, preferably, described crankcase, water cooling box are aluminum alloy material.
The density of aluminum alloy is low, but strength ratio is higher, close to or exceed high-quality steel, its plasticity is good, can be processed into various section bar, has excellent electric conductivity, thermal conductivity and corrosion stability, industrially widely uses.Therefore, use aluminum alloy material to manufacture crankcase and water cooling box, be convenient to machine shaping.Meanwhile, the thermal conductivity of the crankcase that aluminum alloy is made is good, makes heat trnasfer and heat exchange can be good at carrying out.Further, it also has good corrosion resistance, can Long-Time Service and not easily being corroded by the corrosive material in water and water.
Novel plunger pump described above, preferably, the water intake of described intake pipe is provided with water absorbent net head.By water absorbent net head, certain filtration is carried out to the water entering water cooling box, effectively can prevent excessive impurity or particle from entering water cooling box, avoid causing damage to water cooling box, and then also have certain protective action to crankcase.
The invention has the beneficial effects as follows: arrange water cooling box by the bottom of the crankcase at existing plunger pump, cool crankcase, take away heat, the radiating effect improving the existence of existing plunger pump is bad, easily causes the problem that plunger pump damages.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment below, be to be understood that, the following drawings illustrate only some embodiment of the present invention, therefore the restriction to scope should be counted as, for those of ordinary skill in the art, under the prerequisite not paying creative work, other relevant accompanying drawings can also be obtained according to these accompanying drawings.
The structural representation that crankcase during the Novel plunger pump inversion that Fig. 1 provides for the embodiment of the present invention is connected with water cooling box;
The structural representation of the crankcase of the Novel plunger pump that Fig. 2 provides for the embodiment of the present invention;
The water intake of lower box of the water cooling box of the Novel plunger pump that Fig. 3 provides for the embodiment of the present invention and the structural representation of water outlet;
The lower box of water cooling box of the Novel plunger pump that Fig. 4 provides for the embodiment of the present invention and the structural representation of seal washer;
The schematic diagram of the pipeline connecting bend of the Novel plunger pump that Fig. 5 provides for the embodiment of the present invention;
The schematic diagram of the water absorbent net head of the Novel plunger pump that Fig. 6 provides for the embodiment of the present invention.
Reference character gathers: crankcase 100; Crankcase water intake 110; Crankcase water outlet 120; Attachment hole 130; Intake chamber 140; Water cooling box 200; Upper box 210; First diaphragm 211; Lower box 220; Water cooling box water intake 221; Water cooling box water outlet 222; Second diaphragm 223; Seal groove 224; Screw through-hole 225; Intake pipe 300; Outlet pipe 400; Guide channel 500; Screw hole 600; Seal washer 700; Water absorbent net head 800; Pipeline connecting bend 900.
Embodiment
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
The structural representation that crankcase during a kind of Novel plunger pump inversion that Fig. 1 provides for embodiments of the invention is connected with water cooling box, as shown in Figure 1, this Novel plunger pump comprises crankcase 100, water cooling box 200.With reference to accompanying drawing 2, the side of crankcase 100 includes crankcase water intake 110, crankcase water outlet 120, attachment hole 130, and three's length direction laterally successively interval is arranged.Crankcase water intake 110 is passages that current enter the pump housing, and crankcase water outlet 120 is connected with drainage pipe, and plunger group is connected with crankcase 100 by attachment hole 130.
Water cooling box 200 is arranged at the bottom of the outer surface of crankcase 100, and water cooling box 200 entirety is rectangular-shaped, and certainly, in other embodiments, water cooling box 200 can also be cylindric other shapes such as grade, is not limited with this embodiment.Water cooling box 200 comprises upper box 210, lower box 220, with reference to accompanying drawing 2, upper box 210 is an inverted groove, the top of upper box 210 is the bottom of the outer surface of crankcase 100, lower box 220 is the end cap coordinated with upper box 210, and upper box 210 is screwed with lower box 220 and is connected.The external margin of upper box 210 is provided with four screw holes 600, and the external margin of lower box 220 is also provided with four screw through-hole 225 corresponding with the position of the screw hole 600 that upper box 210 is arranged.
Water is in long-term flow process, can contact for a long time with the inside of water cooling box 200, water cooling box 200 is generally metal material, corrosive material in water and water is easily oxidized water cooling box 200, being arranged so that water cooling box 200 to be dismantled of upper box 210 and lower box 220 is come, at set intervals, can clear up its inside and repair.And be screwed connection, make to connect more convenient, also can make upper box 210 and lower box 220 linking together closely.
With reference to accompanying drawing 1, water cooling box 200 is provided with intake pipe 300, outlet pipe 400, intake pipe 300, outlet pipe 400 are all communicated with water cooling box 200, and outlet pipe 400 is communicated with crankcase water intake 110 by intake chamber 140.
Working principle: make into first through water cooling box 200 and crankcase 100, heat exchange to occur by the crankcase 100 water directly being entered plunger pump, just can continuously take away the heat produced when crankcase 100 works, and enter crankcase 100 through the water of heat exchange; When water is discharged, the time that water contacts with bent axle is shorter, and the temperature of water is still lower than the temperature in crankcase 100, thus very little to the variable effect of the temperature in crankcase through the water of crankcase 100, make whole process serve the effect of water-cooled cooling to crankcase 100.
Further, with reference to accompanying drawing 3, water cooling box water intake 221, water cooling box water outlet 222 are arranged on two diagonal angles of the bottom surface of lower box 220 respectively.A segment pipe joint is all protruded at water cooling box water intake 221 on the outer wall of lower box 220, water cooling box water outlet 222 place, to facilitate the connection with pipeline.
Water cooling box 200 plays the effect of heat exchange cooling, therefore need the flowing time of current in water cooling box 200 longer, heat exchange effect just can be better, water cooling box water intake 221 is arranged with the diagonal angle of water cooling box water outlet 222, extend the stroke of current, thus making the glassware for drinking water entering water cooling box 200 have more sufficient flowing time, water cooling box water intake 221, water cooling box water outlet 222 are arranged at the bottom surface of lower box 220, the installation of more convenient processing and pipeline connects.
Further, in the present embodiment, intake pipe 300, outlet pipe 400 are all by the inner space of pipeline connecting bend 900 with water cooling box 200, and pipeline connecting bend 900 is threaded with lower box 220.The structure of pipeline connecting bend 900 as shown in Figure 5, its one end is provided with outside thread, therefore, the water cooling box water intake 221 of above-mentioned lower box 220, the pipe coupling at water cooling box water outlet 222 place are provided with the internal thread that the outside thread that arranges with pipeline connecting bend 900 coordinates.The other end of pipeline connecting bend 900 is provided with annular protrusion structure, is convenient to be connected with pipeline, and has good sealability, and the angle of pipeline connecting bend is 90 degree, is convenient to connect.
Being threaded between pipeline connecting bend 900 with lower box 220, make the sealing of whole water cooling box 200 relatively good, water not easily leaks from joint, pipeline connecting bend 900 is convenient to the connection with pipeline and water cooling box water intake 221, water cooling box water outlet 222, and pipeline need not be bent, thus make connection fast more convenient.
Further, the inside of water cooling box 200 is provided with guide channel 500, and the entrance location of guide channel 500 is corresponding with water cooling box water intake 221 position, and the exit position of guide channel 500 is corresponding with water cooling box water outlet 222 position.
The direction of current can be controlled by guide channel 500, make the time lengthening that current flow in water cooling box 200, thus heat exchange can be carried out for a long time, take away heat as much as possible.Make the cooling effect of water cooling box 200 pairs of crankcases 100 better.The entrance location of guide channel 500, the setting of exit position, make the waiting time of current in water cooling box 200 reach the longest, effect reaches best.
Further, with reference to figure 2, in the present embodiment, the two relative inwalls of upper box 210 are provided with first diaphragm 211, and be crisscross arranged, one end of the first diaphragm 211 is fixedly connected with an inwall of upper box 210, and its bottom surface is fixedly connected with the bottom of crankcase 100, the other end of the first diaphragm 211 has certain distance with relative inwall, so that current pass through.And the first diaphragm 211 and crankcase 100, upper box 210 are one-body molded, two the first diaphragms 211 are crisscross arranged, thus the inner chamber of upper box 210 is separated to form bending guide channel 500 by two the first diaphragms 211, with reference to accompanying drawing 4, lower box 220 is provided with two the second diaphragms 223 with the first diaphragm 211 corresponding matching, after upper box 210 is fixedly connected with lower box 220, first diaphragm 211 and the second diaphragm 223 close-fitting contact, is isolated into bending guide channel 500 by whole water cooling box 200.Certainly, also can more diaphragm be set according to concrete needs.
Can form the guide channel 500 of bending by arranging diaphragm easily, thus extend the flowing time of water in water cooling box 200, take away more heat, the structure of diaphragm is simple simultaneously, is convenient to machine shaping.
Further, in the present embodiment, with reference to accompanying drawing 4, seal washer 700 is provided with between upper box 210 and described lower box 220, the sidewall that lower box 220 is connected with upper box 210 has seal groove 224, and seal groove 224 can be used for placing seal washer 700, makes sealing effect better.By arranging seal washer 700, make connection between upper box 210 and lower box 220 more tight, its better tightness, thus the flowing long-term in water cooling box 200 of current and can not leaking from joint.
Further, in the present embodiment, upper box 210 is one-body molded with crankcase 100.This set, is convenient to time processing shaping, and seal is better, and relative to welding, joint is more difficult to be corroded.
Further, in the present embodiment, crankcase 100, water cooling box 200 are aluminum alloy material.The density of aluminum alloy is low, but strength ratio is higher, close to or exceed high-quality steel, its plasticity is good, can be processed into various section bar, has excellent electric conductivity, thermal conductivity and corrosion stability, industrially widely uses.Therefore, use aluminum alloy material to manufacture crankcase 100 and water cooling box 200, be convenient to machine shaping.Meanwhile, the thermal conductivity of the crankcase 100 that aluminum alloy is made is good, makes heat trnasfer and heat exchange can be good at carrying out.Further, it also has good corrosion resistance, can Long-Time Service and not easily being corroded by the corrosive material in water and water.
Further, with reference to accompanying drawing 6, in the present embodiment, the water intake of intake pipe 300 is provided with water absorbent net head 800.Water absorbent net head 800 is a cylindrical drum, and one section is provided with steel wire, and the other end is threaded with the feed-water end of intake pipe 300.Water can enter by feed-water end, but the solid matter being greater than mesh is blocked.By water absorbent net head 800, certain filtration is carried out to the water entering water cooling box, can effectively prevent excessive impurity or particle from entering water cooling box 200, avoid causing damage to water cooling box 200, and then also have certain protective action to crankcase 100.
In sum, by carrying out heat exchange to crankcase 100, taking away a large amount of heats, making whole plunger pump have better service behaviour, improve existing plunger pump radiating effect bad, easily cause the problem that plunger pump damages.
For making the object of the embodiment of the present invention, technological scheme and advantage clearly, above in conjunction with the accompanying drawing in the embodiment of the present invention, carry out describing clearly and completely to the technological scheme in the embodiment of the present invention, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.The assembly of the embodiment of the present invention describing and indicate in usual accompanying drawing herein can be arranged with various different configuration and design.
Therefore, the detailed description of the above embodiments of the invention to providing in the accompanying drawings the claimed scope of the present invention of not intended to be limiting, but only represent selected embodiment of the present invention.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In describing the invention, it should be noted that, term " " center ", " on ", D score, " left side ", " right side ", " vertically ", " level ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, or this invention product orientation of usually putting or position relationship when using, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.In addition, term " first ", " second ", " the 3rd " etc. only for distinguishing description, and can not be interpreted as instruction or hint relative importance.
In describing the invention, also it should be noted that, unless otherwise clearly defined and limited, term " setting ", " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
Claims (10)
1. a Novel plunger pump, it is characterized in that, comprise crankcase, water cooling box, described water cooling box is arranged at the bottom of the outer surface of described crankcase, described water cooling box is provided with intake pipe, outlet pipe, described intake pipe, outlet pipe are all communicated with described water cooling box, and described outlet pipe is communicated with the water intake of described crankcase.
2. Novel plunger pump according to claim 1, it is characterized in that, described water cooling box comprises upper box, lower box, described upper box is an inverted groove, the top of described upper box is the bottom of the outer surface of described crankcase, described lower box is the end cap coordinated with upper box, and described upper box is screwed with described lower box and is connected.
3. Novel plunger pump according to claim 2, is characterized in that, described water cooling box is rectangular structure, and the water intake of described water cooling box, water outlet are arranged on two diagonal angles of the bottom surface of described lower box respectively.
4. Novel plunger pump according to claim 3, is characterized in that, described intake pipe, outlet pipe are all by the inner space of pipeline connecting bend and described water cooling box, and described pipeline connecting bend is threaded with described lower box.
5. Novel plunger pump according to claim 2, it is characterized in that, the inside of described water cooling box is provided with guide channel, and the entrance location of described guide channel is corresponding with the water inlet position of described water cooling box, and the exit position of described guide channel is corresponding with the water outlet position of described water cooling box.
6. Novel plunger pump according to claim 3, is characterized in that, the two relative inwalls of described water cooling box are provided with diaphragm, and the inner chamber of water cooling box is separated to form bending guide channel by described multiple diaphragm.
7. Novel plunger pump according to claim 2, is characterized in that, is provided with seal washer between described upper box and described lower box.
8. Novel plunger pump according to claim 2, is characterized in that, described upper box and described crankcase one-body molded.
9. Novel plunger pump according to claim 1, is characterized in that, described crankcase, water cooling box are aluminum alloy material.
10. Novel plunger pump according to claim 1, is characterized in that, the water intake of described intake pipe is provided with water absorbent net head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510558975.0A CN105134582B (en) | 2015-09-06 | 2015-09-06 | Novel plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510558975.0A CN105134582B (en) | 2015-09-06 | 2015-09-06 | Novel plunger pump |
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| Publication Number | Publication Date |
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| CN105134582A true CN105134582A (en) | 2015-12-09 |
| CN105134582B CN105134582B (en) | 2018-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510558975.0A Active CN105134582B (en) | 2015-09-06 | 2015-09-06 | Novel plunger pump |
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| US20100074779A1 (en) * | 2006-09-08 | 2010-03-25 | Knorr-Bremse Systeme fuer Nutzfahhrzeuge GmbH | Air Compressor Having a Cast Aluminum Crankcase |
| DE102010055160A1 (en) * | 2010-12-18 | 2012-06-21 | Mahle International Gmbh | Producing cylinder crankcase comprising integrally molded in cylinder liners and cooling water space, comprises providing cylinder liners, introducing cylinder liners and cylinder liners, casting and removing material of cylinder crankcase |
| CN102734229A (en) * | 2012-07-13 | 2012-10-17 | 襄樊五二五泵业有限公司 | Labyrinth cooling structure for bearing box of pump |
| CN203560089U (en) * | 2013-11-19 | 2014-04-23 | 天津市通洁高压泵制造有限公司 | High-pressure pump rear cover capable of improving heat dissipation performance |
| CN203627157U (en) * | 2013-12-27 | 2014-06-04 | 威伯科汽车控制系统（中国）有限公司 | Water-cooled air compressor crank shell capable of improving performance of cylinder |
| CN204003046U (en) * | 2014-07-17 | 2014-12-10 | 浙江安奇迪园林机械有限公司 | The cooling system of engine crankcase |
| CN205025748U (en) * | 2015-09-06 | 2016-02-10 | 陆雄机械（浙江）有限公司 | Novel plunger pump |
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2015
- 2015-09-06 CN CN201510558975.0A patent/CN105134582B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100074779A1 (en) * | 2006-09-08 | 2010-03-25 | Knorr-Bremse Systeme fuer Nutzfahhrzeuge GmbH | Air Compressor Having a Cast Aluminum Crankcase |
| CN201412282Y (en) * | 2009-06-18 | 2010-02-24 | 缪文云 | Cooling type double-cylinder plunger pump |
| DE102010055160A1 (en) * | 2010-12-18 | 2012-06-21 | Mahle International Gmbh | Producing cylinder crankcase comprising integrally molded in cylinder liners and cooling water space, comprises providing cylinder liners, introducing cylinder liners and cylinder liners, casting and removing material of cylinder crankcase |
| CN102734229A (en) * | 2012-07-13 | 2012-10-17 | 襄樊五二五泵业有限公司 | Labyrinth cooling structure for bearing box of pump |
| CN203560089U (en) * | 2013-11-19 | 2014-04-23 | 天津市通洁高压泵制造有限公司 | High-pressure pump rear cover capable of improving heat dissipation performance |
| CN203627157U (en) * | 2013-12-27 | 2014-06-04 | 威伯科汽车控制系统（中国）有限公司 | Water-cooled air compressor crank shell capable of improving performance of cylinder |
| CN204003046U (en) * | 2014-07-17 | 2014-12-10 | 浙江安奇迪园林机械有限公司 | The cooling system of engine crankcase |
| CN205025748U (en) * | 2015-09-06 | 2016-02-10 | 陆雄机械（浙江）有限公司 | Novel plunger pump |
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| CN105134582B (en) | 2018-04-24 |
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