CN114658647A - Plunger type reciprocating pump with multi-loop hydraulic combination - Google Patents
Plunger type reciprocating pump with multi-loop hydraulic combination Download PDFInfo
- Publication number
- CN114658647A CN114658647A CN202210180362.8A CN202210180362A CN114658647A CN 114658647 A CN114658647 A CN 114658647A CN 202210180362 A CN202210180362 A CN 202210180362A CN 114658647 A CN114658647 A CN 114658647A
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- Prior art keywords
- plunger
- pump body
- sealing
- sleeve
- pump
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 92
- 239000007788 liquid Substances 0.000 claims abstract description 56
- 238000003825 pressing Methods 0.000 claims abstract description 17
- 238000011010 flushing procedure Methods 0.000 claims abstract description 12
- 239000000945 filler Substances 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 description 17
- 238000005406 washing Methods 0.000 description 7
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/02—Packing the free space between cylinders and pistons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention relates to a plunger type reciprocating pump with a multi-loop hydraulic combination, which comprises a pump body, a cylinder sleeve and a plunger arranged in the cylinder sleeve, wherein the plunger slides along the length direction of the cylinder sleeve, a pump cavity is arranged in the pump body, a liquid inlet one-way valve and a liquid discharge one-way valve are respectively arranged at two ends of the pump body, a sealing assembly and a pressing sleeve are arranged in the cylinder sleeve, a sealing sleeve is arranged at one side of the sealing assembly close to the pump body, the outer circumferential wall of the plunger is positioned in the sealing assembly, the pressing sleeve and the sealing sleeve, a cavity is arranged in the sealing sleeve, a first liquid inlet and a first liquid discharge port which are communicated with the cavity are respectively arranged at two sides of the sealing sleeve, an isobaric flushing liquid is provided for the cavity by the first liquid inlet, a spiral groove is arranged at one side of the sealing sleeve close to the pump body, and a circular groove is arranged at one side of the sealing sleeve close to the sealing assembly. The plunger type reciprocating pump has better sealing property.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to a plunger type reciprocating pump with a multi-loop hydraulic combination, and belongs to the technical field of plunger type reciprocating pumps.
[ background of the invention ]
The plunger type reciprocating pump is characterized in that: the flow-control valve has the advantages of simple structure, large flow, high working pressure, small flow pulsation and basically no pressure influence on the flow, and is still indispensible in the industries of energy, petrifaction, thermal power, chemical industry, environmental protection and the like.
The working principle of the reciprocating pump is as follows: the gear shaft driven by the motor is meshed with the gear on the crankshaft, the crankshaft obtains speed reduction circular motion, and the rotary motion is converted into the reciprocating motion of the plunger piston through the crankshaft connecting rod mechanism. The reciprocating motion of the plunger pushes the medium to move, the volume of the medium cavity is changed alternately, and the medium is continuously and quantitatively output under the action of the suction check valve and the discharge check valve.
The plunger type reciprocating pump in the prior art mainly has two defects: 1. the leakage problem of different degrees is inevitable to exist because of the sealing structure, and the environment is safe and unfavorable. 2. When the media contains particles, the plug and filler will accelerate wear.
[ summary of the invention ]
The invention aims to solve the technical problem of providing a plunger type reciprocating pump with a multi-circuit hydraulic combination, which has better sealing property.
The technical scheme adopted by the invention is as follows:
the utility model provides a plunger type reciprocating pump with multiloop hydraulic pressure combination, includes the pump body, cylinder liner and sets up the plunger in the cylinder liner, be equipped with the pump chamber in the pump body, pump body both ends are equipped with entry and export respectively, be equipped with seal assembly in the cylinder liner and compress tightly the cover, one side that seal assembly is close to the pump body is equipped with the seal cover, the seal assembly side is equipped with the flush fluid export, the flush fluid export is linked together with the entry of the pump body, be equipped with the cavity in the seal cover, the seal cover both sides are equipped with first inlet and the first drain outlet with the cavity intercommunication respectively, first inlet provides isobaric flush fluid for the cavity, one side that the seal cover is close to the pump body is equipped with the helicla flute, one side that the seal cover is close to seal assembly is equipped with the annular, the outer periphery of plunger is in seal assembly, compresses tightly the cover and the seal cover.
The beneficial effects of the invention are as follows:
in the invention, a sealing component and a pressing sleeve are arranged in the cylinder sleeve, a sealing sleeve is arranged on one side of the sealing component close to the pump body, the outer circumferential wall of the plunger is positioned in the sealing component, the pressing sleeve and the sealing sleeve, a cavity is arranged in the sealing sleeve, a first liquid inlet and a first liquid outlet which are communicated with the cavity, wherein the first liquid inlet provides isobaric flushing liquid for the cavity, the stable hydraulic pressure is formed in the sealing sleeve by the constant flow of the flushing fluid through the sealing sleeve, so that the pressure liquid seal is realized, due to the existence of hydraulic pressure at the sealing sleeve, the flushing liquid can block the medium in the pump body from invading into the sealing assembly, meanwhile, the flushing liquid can also press the invaded medium back to the pump cavity so as to effectively prevent the medium from leaking to the outer side of the cylinder sleeve, therefore, the sealing performance of the invention is also improved, the invention can be used for conveying volatile or corrosive media, and the application range of the invention is improved.
In addition, the spiral groove is formed in one side, close to the pump body, of the sealing sleeve, when small particles in the medium are close to the sealing assembly and cannot be washed by washing liquid, the spiral groove can be used for containing the small particles, then the spiral groove can also guide the washing liquid to wash the small particles back to the pump cavity along the spiral groove, the small particles can be further prevented from moving towards the sealing assembly through the spiral groove, the sealing assembly is protected, the service life of the sealing assembly is prolonged, the spiral groove is also suitable for conveying the medium containing the particles, and the application range of the spiral groove is further widened.
In order to further protect the sealing assembly, one side of the sealing sleeve, which is close to the sealing assembly, is provided with an annular groove, and when small particles in the medium leak out, the annular groove is used for containing the small particles, so that the small particles are prevented from continuously moving outwards, and the sealing assembly is further protected.
Preferably, the surface of the pressing sleeve, which is close to the plunger, is provided with an inner groove, a self-tightening sealing assembly is installed in the inner groove, and the self-tightening sealing assembly is sleeved on the plunger.
Preferably, the side of the self-tightening sealing assembly, which is far away from the pump body, is provided with sealing filler.
Preferably, the sealing filler is a V-shaped combined filler.
Preferably, a second liquid inlet and a second liquid outlet are respectively arranged on two sides of the self-tightening sealing assembly, and the second liquid inlet provides an isobaric flushing liquid.
Preferably, one end of the cylinder sleeve is provided with an adjusting nut for adjusting the compression sleeve, and the end part of the cylinder sleeve is provided with a thread matched with the adjusting nut.
Preferably, the inlet is a liquid inlet one-way valve, and the outlet is a liquid discharge one-way valve.
Other features and advantages of the present invention will be disclosed in more detail in the following detailed description of the invention and the accompanying drawings.
[ description of the drawings ]
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a sectional view showing the whole structure of embodiment 1 of the present invention;
FIG. 2 is a sectional view of a sealing boot in embodiment 1 of the present invention
FIG. 3 is an enlarged view of a portion A of FIG. 1;
fig. 4 is a partial enlarged view of fig. 1, which is not sealed at B.
Reference numerals are as follows: 1 cylinder sleeve, 2 pump bodies, 21 pump cavities, 22 inlets, 23 outlets, 3 plungers, 4 sealing assemblies, 51 first liquid discharge ports, 52 first liquid inlet ports, 53 flushing liquid outlet ports, 54 second liquid discharge ports, 55 second liquid inlet ports, 6 pressing sleeves, 61 self-tightening sealing assemblies, 62 sealing fillers, 63 adjusting nuts, 7 sealing sleeves, 71 spiral grooves, 72 cavities and 73 annular grooves.
[ detailed description ] A
The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example 1:
as shown in fig. 1 to 4, this embodiment shows a plunger type reciprocating pump with multi-loop hydraulic combination, which includes a pump body 2, a cylinder sleeve 1, and a plunger 3 disposed in the cylinder sleeve 1, where the plunger 3 slides along a length direction of the cylinder sleeve 1, a pump cavity 21 is disposed in the pump body 2, an inlet 22 and an outlet 23 are disposed at two ends of the pump body 2, a sealing assembly 4 and a pressing sleeve 6 are disposed in the cylinder sleeve 1, a sealing sleeve 7 is disposed at one side of the sealing assembly 4 close to the pump body 2, an outer circumferential wall of the plunger 3 is disposed in the sealing assembly 4, the pressing sleeve 6 and the sealing sleeve 7, an adjusting nut 63 for adjusting the pressing sleeve 6 is disposed at one end of the cylinder sleeve 1, a thread matched with the adjusting nut 63 is disposed at an end of the cylinder sleeve 1, a cavity 72 is disposed in the sealing sleeve 7, a first liquid inlet 52 and a first liquid outlet 51 communicated with the cavity 72 are disposed at two sides of the sealing sleeve 7, first inlet 52 provides isobaric flush fluid for cavity 72, one side that the seal cover 7 is close to the pump body 2 is equipped with helical groove 71, one side that the seal cover 7 is close to seal assembly 4 is equipped with annular 73, the side of seal assembly 4 is equipped with flush fluid export 53, flush fluid export 53 is linked together with the entry 22 of the pump body 2.
In this embodiment, a sealing assembly 4 and a pressing sleeve 6 are arranged in the cylinder sleeve 1, a sealing sleeve 7 is arranged on one side of the sealing assembly 4 close to the pump body 2, the outer circumferential wall of the plunger 3 is positioned in the sealing assembly 4, the pressing sleeve 6 and the sealing sleeve 7, a cavity 72 is arranged in the sealing sleeve 7, a first liquid inlet 52 and a first liquid outlet 51 which are communicated with the cavity 72 are respectively arranged on two sides of the sealing sleeve 7, the first liquid inlet 52 and the first liquid outlet 51 are symmetrically arranged, the first liquid inlet 52 provides an isobaric flushing liquid for the cavity 72, stable hydraulic pressure is formed in the sealing sleeve 7 by the constant flowing of the flushing liquid through the sealing sleeve 7, pressure liquid sealing is realized, the flushing liquid can prevent a medium in the pump body 2 from invading the sealing assembly 4 due to the existence of the hydraulic pressure at the sealing sleeve 7, and can also press the invaded medium back to the pump cavity 21, the leakage of the medium to the outer side of the cylinder sleeve 1 is effectively prevented, so that the sealing performance of the embodiment is improved, the embodiment can be used for conveying volatile or corrosive media, and the application range of the embodiment is widened.
In addition, in this embodiment, a spiral groove 71 is provided on one side of the sealing sleeve 7 close to the pump body 2, when small particles in the medium are close to the sealing assembly 4 and cannot be washed by the washing liquid, the spiral groove 71 can be used for accommodating the small particles, and then the spiral groove 71 can also guide the washing liquid to wash the small particles back into the pump cavity 21 along the spiral groove 71, so that the small particles can be further prevented from moving towards the sealing assembly 4 through the spiral groove 71, the sealing assembly 4 is protected, the service life of the sealing assembly 4 is prolonged, the embodiment can also be suitable for conveying the medium containing the particles, and the application range of the embodiment is further increased.
Secondly, in order to further protect the sealing assembly 4, in this embodiment, an annular groove 73 is provided on a side of the sealing sleeve 7 close to the sealing assembly 4, and after the small particles in the medium leak out, the annular groove 73 is used for containing the small particles, so as to prevent the small particles from continuously moving outwards, and further protect the sealing assembly 4.
In order to further improve the sealing performance of this embodiment, one end of the cylinder sleeve 1 in this embodiment is provided with an adjusting nut 63 for adjusting the pressing sleeve 6, the end of the cylinder sleeve 1 is provided with a thread matched with the adjusting nut 63, and a worker can control the tightness of the pressing sleeve 6 by controlling the screwing amount of the adjusting nut 63 and transmit the pressing force to the sealing component 4, so as to achieve a better sealing effect, and secondly, the side surface of the sealing component 4 is provided with a washing liquid outlet 53, the washing liquid outlet 53 is communicated with the liquid inlet one-way valve of the pump body 2, so that the leaked medium can be brought back to the pump body 2 through the washing liquid outlet 53, thereby further reducing the leakage amount of the medium, improving the sealing performance of this embodiment, and basically realizing no leakage in this embodiment.
In addition, in this embodiment, an inner groove is formed in the surface of the pressing sleeve 6 close to the plunger 3, a self-tightening sealing assembly 61 is installed in the inner groove, the self-tightening sealing assembly 61 is sleeved on the plunger 3, a second liquid inlet 55 and a second liquid outlet 54 are respectively formed in two sides of the self-tightening sealing assembly 61, the second liquid inlet 55 and the second liquid outlet 54 are symmetrically arranged, the second liquid inlet 55 provides an isobaric flushing liquid, a sealing filler 62 is arranged on one side of the self-tightening sealing assembly 61 away from the pump body 2, the sealing filler 62 is a V-shaped combined filler, a preset compression amount of a spring in the self-tightening sealing assembly 61 provides a set pressing force, and the V-shaped combined filler is properly pressed, so that the plunger 312 does not leak during suction; when the plunger 3 is in a liquid discharging stroke, the sealing force of the V-shaped packing can be increased along with the increase of the bearing pressure due to the structure of the V-shaped packing.
While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in many different forms without departing from the spirit and scope of the invention as set forth in the following claims. Any modifications which do not depart from the functional and structural principles of the present invention are intended to be included within the scope of the claims.
Claims (7)
1. The utility model provides a plunger type reciprocating pump with multiloop hydraulic pressure combination, includes the pump body, cylinder liner and sets up the plunger in the cylinder liner, its characterized in that: the utility model discloses a pump body, including the pump body, the pump body is equipped with the pump chamber in the pump body, pump body both ends are equipped with entry and export respectively, be equipped with seal assembly in the cylinder liner and compress tightly the cover, one side that seal assembly is close to the pump body is equipped with the seal cover, the seal assembly side is equipped with the flush fluid export, the entry of flush fluid export and the pump body is linked together, be equipped with the cavity in the seal cover, the seal cover both sides are equipped with first inlet and the first drain outlet with the cavity intercommunication respectively, first inlet provides the isobaric flush fluid for the cavity, one side that the seal cover is close to the pump body is equipped with the helicla flute, one side that the seal cover is close to seal assembly is equipped with the annular, the outer periphery of plunger is in seal assembly, compresses tightly in cover and the seal cover.
2. A plunger-type reciprocating pump with multi-circuit hydraulic combination as set forth in claim 1, wherein: the surface of the pressing sleeve close to the plunger is provided with an inner groove, a self-tightening sealing assembly is installed in the inner groove, and the self-tightening sealing assembly is sleeved on the plunger.
3. The plunger-type reciprocating pump with multi-circuit hydraulic combination as set forth in claim 2, wherein: and one side of the self-tightening sealing assembly, which is far away from the pump body, is provided with sealing filler.
4. The plunger-type reciprocating pump with multi-circuit hydraulic combination as set forth in claim 3, characterized in that: the sealing filler is a V-shaped combined filler.
5. A plunger-type reciprocating pump with multi-circuit hydraulic combination as set forth in claim 2, wherein: and a second liquid inlet and a second liquid outlet are respectively arranged on two sides of the self-tightening sealing assembly, and the second liquid inlet provides isobaric flushing liquid.
6. The plunger-type reciprocating pump with multi-circuit hydraulic combination as set forth in claim 1, wherein: one end of the cylinder sleeve is provided with an adjusting nut used for adjusting the compression sleeve, and the end part of the cylinder sleeve is provided with a thread matched with the adjusting nut.
7. A plunger-type reciprocating pump with multi-circuit hydraulic combination as set forth in claim 1, wherein: the inlet is a liquid inlet one-way valve, and the outlet is a liquid discharge one-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210180362.8A CN114658647B (en) | 2022-02-26 | 2022-02-26 | Plunger type reciprocating pump with multi-loop hydraulic combination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210180362.8A CN114658647B (en) | 2022-02-26 | 2022-02-26 | Plunger type reciprocating pump with multi-loop hydraulic combination |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114658647A true CN114658647A (en) | 2022-06-24 |
| CN114658647B CN114658647B (en) | 2024-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210180362.8A Active CN114658647B (en) | 2022-02-26 | 2022-02-26 | Plunger type reciprocating pump with multi-loop hydraulic combination |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114658647B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673656A (en) * | 2022-03-14 | 2022-06-28 | 德帕姆(杭州)泵业科技有限公司 | Plunger type reciprocating pump with liquid seal function |
| CN115143092A (en) * | 2022-08-05 | 2022-10-04 | 德帕姆(杭州)泵业科技有限公司 | Reciprocating pump capable of backwashing |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4833976A (en) * | 1983-07-25 | 1989-05-30 | Kleven Loland A/S | Sealing means for a high pressure axial piston pump |
| CN101070841A (en) * | 2007-06-15 | 2007-11-14 | 江苏大学 | High-pressure-resistant wear-resisting contact type reciprocation sealing with washing ring |
| CN101225805A (en) * | 2008-02-01 | 2008-07-23 | 大连劳雷流体设备有限公司 | Non-leakage reversed flow type plunger pump |
| US20080193299A1 (en) * | 2007-02-12 | 2008-08-14 | Kenneth Doyle Oglesby | High pressure slurry plunger pump |
| CN207406474U (en) * | 2017-11-16 | 2018-05-25 | 重庆水泵厂有限责任公司 | A kind of stuffing box flushing mechanism |
| CN112524019A (en) * | 2020-12-21 | 2021-03-19 | 戴勒普(杭州)流体控制科技有限公司 | Backflow type anti-leakage oil pressure sealing structure |
| CN213298245U (en) * | 2020-10-27 | 2021-05-28 | 重庆水泵厂有限责任公司 | Reciprocating pump stuffing box with flushing function |
-
2022
- 2022-02-26 CN CN202210180362.8A patent/CN114658647B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4833976A (en) * | 1983-07-25 | 1989-05-30 | Kleven Loland A/S | Sealing means for a high pressure axial piston pump |
| US20080193299A1 (en) * | 2007-02-12 | 2008-08-14 | Kenneth Doyle Oglesby | High pressure slurry plunger pump |
| CN101070841A (en) * | 2007-06-15 | 2007-11-14 | 江苏大学 | High-pressure-resistant wear-resisting contact type reciprocation sealing with washing ring |
| CN101225805A (en) * | 2008-02-01 | 2008-07-23 | 大连劳雷流体设备有限公司 | Non-leakage reversed flow type plunger pump |
| CN207406474U (en) * | 2017-11-16 | 2018-05-25 | 重庆水泵厂有限责任公司 | A kind of stuffing box flushing mechanism |
| CN213298245U (en) * | 2020-10-27 | 2021-05-28 | 重庆水泵厂有限责任公司 | Reciprocating pump stuffing box with flushing function |
| CN112524019A (en) * | 2020-12-21 | 2021-03-19 | 戴勒普(杭州)流体控制科技有限公司 | Backflow type anti-leakage oil pressure sealing structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673656A (en) * | 2022-03-14 | 2022-06-28 | 德帕姆(杭州)泵业科技有限公司 | Plunger type reciprocating pump with liquid seal function |
| CN115143092A (en) * | 2022-08-05 | 2022-10-04 | 德帕姆(杭州)泵业科技有限公司 | Reciprocating pump capable of backwashing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114658647B (en) | 2024-02-09 |
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