CN201810531U - Reciprocating type hydraulic diaphragm pump of three-valve free device - Google Patents
Reciprocating type hydraulic diaphragm pump of three-valve free device Download PDFInfo
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- CN201810531U CN201810531U CN2010202908047U CN201020290804U CN201810531U CN 201810531 U CN201810531 U CN 201810531U CN 2010202908047 U CN2010202908047 U CN 2010202908047U CN 201020290804 U CN201020290804 U CN 201020290804U CN 201810531 U CN201810531 U CN 201810531U
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- piston
- diaphragm
- hydraulic cylinder
- connecting rod
- bellows
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- 230000004888 barrier function Effects 0.000 claims description 33
- 239000013618 particulate matter Substances 0.000 claims description 9
- 230000008021 deposition Effects 0.000 claims description 8
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 7
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 17
- 238000000034 method Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000003250 coal slurry Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000009856 non-ferrous metallurgy Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
A reciprocating type hydraulic diaphragm pump of a three-valve free device comprises a hydraulic cylinder and a piston, wherein a medium cavity is arranged at the front end of the hydraulic cylinder; a power device is arranged at the rear end of the hydraulic cylinder; the piston is linked with the power device through a piston rod and comprises a diaphragm piston and a drive piston; the diaphragm piston is connected with the drive piston through a connecting rod; the outside diameter of the diaphragm piston is the same as that of the drive piston; the diaphragm piston comprises a piston body and a diaphragm; a through hole allowing a hydraulic medium to pass through is formed on the piston body; the front surface of the diaphragm is in contact with a conveying medium; the rear surface of the diaphragm is in contact with the hydraulic medium; a corrugated pipe which allows the hydraulic medium to penetrate through and prevents particles from penetrating through is arranged between the diaphragm piston and the drive piston; the front end of the corrugated pipe is fixedly connected with the connecting rod through a front flange; the rear end of the corrugated pipe is fixedly connected with the hydraulic cylinder through a rear flange; the hydraulic cylinder is divided into a front sub-cavity and a rear sub-cavity by the corrugated pipe; the diaphragm piston is positioned in the front sub-cavity; and the drive piston is positioned in the rear sub-cavity. The utility model has the advantages of simple structure and long service life and avoids debugging.
Description
Technical field
The utility model relates to a kind of reciprocating hydraulic diaphragm pump.
Technical background
Diaphragm pump is had many uses, and can be used for carrying a variety of fluids of different nature, as high temperature, high pressure, high concentration, high density, large particle, easily precipitate, tempering property is strong, corrosivity is strong medium.The industrial industries such as petroleum production, petrochemical industry, Coal Chemical Industry, nonferrous metallurgy, electric power that are used for are carried chemical medium, mud, ore pulp, water coal slurry, slag slurry, sewage etc.Its outstanding feature is by barrier film fed sheet of a media and working medium to be separated, and can realize zero leakage in theory.
In the conventional reciprocating formula hydraulic diaphragm pump, adopt dull and stereotyped barrier film, its diaphragm cavity structure as shown in Figure 1 more.The to-and-fro motion of plunger (piston), through the hydraulic medium transmission, the periodicity front and back of changing barrier film into are around Qu Yundong, and the cylindrical size of barrier film, front and back are directly proportional around the swept volume of bent amount of deformation with plunger (piston), and the maximum value of distortion is limited by front and back barrier film curved surface.When plunger (piston) was suction Cheng Yundong, its swept volume strengthened gradually, and pressure reduces gradually, and barrier film is deflection deformation backward, and then medium is inhaled into.When plunger (piston) was done the scheduling campaign, plunger (piston) swept volume reduced gradually, and the compression hydraulic medium through the hydraulic medium transmission, makes barrier film deflection deformation forward, and this moment, medium was discharged from.Barrier film has hydraulic medium and fed sheet of a media is isolated and the effect of transmission pressure.Owing to require barrier film in the regime of elastic deformation of regulation, to work, to avoid because tear and fatigue damage around bent rock deformation pressure is excessive.But along with the increase of pump duty, the corresponding increase of barrier film radial dimension makes pump boundary dimension, stress sharply increase, and stressed deterioration and consumptive material are many, installs, operates, safeguards very difficulty; Simultaneously, for the front and back deflection deformation scope of controlling barrier film with prevent overload, diaphragm pump usually should be in the oil hydraulic cylinder inner chamber three control valve units such as design safety valve, outlet valve, Fill valve, complex structure, debugging requires high, and to the pump manufacturing, processing, debugging, operation have proposed higher requirement.In addition for the conveyor belt particle, easily precipitate, tempering property is strong, corrosivity is strong medium, the boundary dimension of barrier film is big more, manufacturing process is difficult more, the damaged also corresponding increase of probability.
The model utility content
Need in the oil hydraulic cylinder inner chamber, design three control valve units for overcoming existing diaphragm pump, complex structure, debugging require high, and the shortcoming that working life is short the utility model proposes a kind of simple in structure, need not debugging, the reciprocating hydraulic diaphragm pump of nothing three control valve units of long service life.
The reciprocating hydraulic diaphragm pump that does not have three control valve units, comprise oil hydraulic cylinder and piston adaptive with described oil hydraulic cylinder and that be tightly connected, the front end of described oil hydraulic cylinder is provided with the media cavity of holding fed sheet of a media, the rear end of described oil hydraulic cylinder is provided with and promotes the power plant of described piston along the oil hydraulic cylinder axially reciprocating, and described piston is by piston rod and the interlock of described power plant;
It is characterized in that: described piston comprises diaphragm piston that is connected with described media cavity and the drive piston that is connected with described power plant, described diaphragm piston is connected with described drive piston by connecting rod, and described diaphragm piston is identical with the external diameter of drive piston;
Described diaphragm piston comprises piston body and the barrier film that is arranged on the described piston body, described piston body is provided with the through hole that allows hydraulic medium to pass through, and the front surface of described barrier film contacts with described fed sheet of a media, the rear surface contacts with described hydraulic medium;
Be provided with the bellows that allows hydraulic medium to penetrate and stop particulate matter to penetrate between described diaphragm piston and the drive piston, the front end of described bellows is affixed by forward flange and described connecting rod, the rear end is affixed by rear flange and described oil hydraulic cylinder;
The sub-chamber in sub-chamber and back before described bellows is divided into described oil hydraulic cylinder, described diaphragm piston is positioned at described preceding sub-chamber, and described drive piston is positioned at sub-chamber, described back.
Further, described bellows comprises the body that the filter cloth that stops particulate matter to penetrate by allowing hydraulic medium to penetrate is made, support ring and the positioning ring of arranging along the axial space of bellows body and be positioned at the bellows body, allow described connecting rod insertion and its connecting rod cover of sliding;
Described connecting rod cover is affixed with described forward flange, and described rear flange center is provided with the through hole that allows described connecting rod and connecting rod cover to pass;
The outer ring of described support ring and described bellows body are affixed, and the inner ring of described support ring allows described connecting rod cover to insert and slides in it;
Described positioning ring and described bellows body are affixed, and the diameter of described positioning ring is less than the external diameter of described support ring.
Further, the body periphery of described bellows is provided with cylindrical diaphragm, and the front end of described cylindrical diaphragm and described bellows body are affixed, rear end and described rear flange are affixed.
Further, described diaphragm piston rear end is fixed with the diaphragm piston bar, and described diaphragm piston bar is affixed by clip and described connecting rod; The piston rod of described drive piston is connected with described power plant.
Further, the affixed deposition tank in described oil hydraulic cylinder bottom, the casing wall of described oil hydraulic cylinder are provided with and allow hydraulic medium and particulate matter to fall into the interior through hole of described deposition tank.
Further, described power plant are connecting rod.
Technical conceive of the present utility model is: on the basis of conventional diaphragm pump oil hydraulic cylinder is improved.Increased and isodiametric diaphragm piston of drive piston and bellows, utilized diaphragm piston that fed sheet of a media and hydraulic medium are separated; By bellows the oil hydraulic cylinder inner chamber is divided into the sub-chamber in preceding sub-chamber and back, makes the motion in different zones of drive piston and diaphragm piston; Simultaneously, through hole is set on diaphragm piston, makes the pressure of the hydraulic medium that is positioned at the barrier film both sides and fed sheet of a media identical, the variation in pressure of media cavity and oil hydraulic cylinder inner chamber is synchronous.
Power plant will rotatablely move and be converted into to-and-fro motion, and power plant drive the piston rod to-and-fro motion of drive piston, and this to-and-fro motion is passed to diaphragm piston through connecting rod, diaphragm piston bar.
In discharging defeated process, suction valve closure, drive piston travels forward, and hydraulic medium pressure raises, and promotes diaphragm piston and travels forward, thereby the fed sheet of a media pressure of barrier film front surface is raise, and expulsion valve is opened, and discharges medium.
In suction process, expulsion valve cuts out, and drive piston moves backward, and hydraulic medium pressure descends, and diaphragm piston is moved backward, thereby the fed sheet of a media pressure of barrier film front surface is descended, and suction valve is opened, and sucks medium in the media cavity.
Because drive piston is identical with the diaphragm piston external diameter, under the prerequisite of ignoring machining error and compressibility of the medium energy, the oil hydraulic cylinder cavity volume in theory will be less than changing, thereby the barrier film on the medium transport process septation piston does not have distortion or has very little deformation, and the life-span that barrier film uses is long.
To-and-fro motion along with diaphragm piston, fixedly be that bellows on the connecting rod is realized to-and-fro motion synchronously, the middle footpath of its bellows is identical with the diaphragm piston external diameter, like this in the to-and-fro motion engineering, two regional volumes that bellows is separated are constant substantially, make the exchange that the hydraulic medium in two zones can be the least possible.
The utlity model has following beneficial effect:
1. through hole is set on diaphragm piston, in pump group running, guarantee not only that pressure equates synchronously, outside the automatic vent, and the amount of leakage that drive piston and diaphragm piston are synchronized with the movement all can average out by through hole, therefore can cancel three control valve units such as safety valve, outlet valve, Fill valve of conventional diaphragm pump, improve pump group reliability of operation and life-span greatly, reduced the complexity of processing, manufacturing, installation, debugging, reduced engineering time and maintenance cost.
2. in the fed sheet of a media process, because diaphragm piston pressure at both sides balance, make this kinematic pair since the sealing the frictional force that produces very little, no pressure reduction, leakage rate is few, simultaneously hydraulic medium has played good lubricated, cooling effect to the diaphragm piston kinematic pair, makes this kinematic pair long service life, reliability height, and life of product is long.
3. in diaphragm piston to-and-fro motion process, the medium that leaks by the diaphragm piston kinematic pair will be moved into the oil hydraulic cylinder inner chamber along with hydraulic medium.Deposition tank is set in oil hydraulic cylinder bottom, density can be precipitated gradually greater than the solid particle of hydraulic medium and enter in the deposition tank, ensure the running environment of drive piston, make drive piston be difficult for being scratched, increase the service life by solid particle.
Bellows is kept apart the solid particle and the drive piston that leak again simultaneously, stop solid particle to enter the piston seal kinematic pair, guarantee that drive piston is sealed under the good hydraulic medium environment operation, guarantee kinematic pair operation, sealing, lubricated reliable, prolong piston seal working life greatly.
4. because the barrier film on the diaphragm piston only transmits the pressure of both sides, be out of shape little, irrelevant with performance parameter such as pump duty, so can adopt structure and material economically and reasonably, what greatly reduce barrier film manufactures cost and difficulty, helps product reliability to improve and the life-span prolongation; Owing to the requirement of no barrier film radial dimension, pump group barrier film radial dimension has had dwindling by a relatively large margin simultaneously, thereby solves the big difficult problem of conventional diaphragm pump boundary dimension, has reduced product cost, has widened the application area of diaphragm pump.
Description of drawings
Fig. 1 conventional reciprocating formula diaphragm pump diaphragm cavity structural representation.
Fig. 2 is a schematic representation of the present utility model.
Fig. 3 is the I portion enlarged view of Fig. 2.
Fig. 4 is the schematic representation of each assembly in the oil hydraulic cylinder inner chamber.
Fig. 5 is the schematic representation of diaphragm piston.
Fig. 6 is the schematic representation of the piston body of diaphragm piston.
Fig. 7 is the schematic representation of bellows.
Embodiment
With reference to accompanying drawing, further specify the utility model:
The reciprocating hydraulic diaphragm pump that does not have three control valve units, comprise oil hydraulic cylinder 1 and piston adaptive with described oil hydraulic cylinder 1 and that be tightly connected, the front end of described oil hydraulic cylinder 1 is provided with the media cavity 2 of holding fed sheet of a media, 1 rear end of described oil hydraulic cylinder is provided with and promotes the power plant 3 of described piston along the oil hydraulic cylinder axially reciprocating, and described piston is by piston rod and 3 interlocks of described power plant;
Described piston comprises diaphragm piston 4 that is connected with described media cavity 2 and the drive piston 5 that is connected with described power plant, described diaphragm piston 4 is connected with described drive piston 5 by connecting rod 6, and described diaphragm piston 4 is identical with the external diameter of drive piston 5;
Described diaphragm piston 4 comprises piston body 41 and the barrier film 42 that is arranged on the described piston body 41, described piston body 41 is provided with the through hole 43 that allows hydraulic medium to pass through, and the front surface of described barrier film 42 contacts with described fed sheet of a media, the rear surface contacts with described hydraulic medium;
Be provided with the bellows 7 that allows hydraulic medium to penetrate and stop particulate matter to penetrate between described diaphragm piston 4 and the drive piston 5, the front end of described bellows 7 is affixed by forward flange 71 and described connecting rod, the rear end is affixed by rear flange 72 and described oil hydraulic cylinder 1;
The sub-chamber 12 in sub-chamber 11 and back before described bellows 7 is divided into described oil hydraulic cylinder, described diaphragm piston 4 is positioned at described preceding sub-chamber 11, and described drive piston 5 is positioned at sub-chamber 12, described back.
Described bellows 7 comprises the bellows body 73 that the filter cloth that stops particulate matter to penetrate by allowing hydraulic medium to penetrate is made, support ring 74 and the positioning ring of arranging along the axial spaces of bellows body 73 75 and be positioned at bellows body 73, allow described connecting rod 6 to insert and its connecting rod of sliding overlaps 76;
Described connecting rod cover 76 and described forward flange 71 are affixed, and described rear flange 72 centers are provided with and allow described connecting rod 6 and connecting rod cover 76 through holes that pass 721;
The outer ring of described support ring 74 and described bellows body 73 are affixed, and the inner ring of described support ring 74 allows described connecting rod cover 76 to insert and slides in it;
Described positioning ring 75 and described bellows body 73 are affixed, and the diameter of described positioning ring 75 is less than the external diameter of described support ring 74.
Bellows body 73 peripheries of described bellows 7 are provided with cylindrical diaphragm 77, and the front end of described cylindrical diaphragm 77 and described bellows body are 73 affixed, rear end and described rear flange 72 are affixed.
Described diaphragm piston 4 rear ends are fixed with diaphragm piston bar 44, and described diaphragm piston bar 44 is affixed by clip 8 and described connecting rod 6; The piston rod 51 of described drive piston 5 is connected with described power plant 3.Barrier film 42 is fixed on the diaphragm piston body 41 by retaining ring 45.
The affixed deposition tank 9 in described oil hydraulic cylinder 1 bottom, the casing wall of described oil hydraulic cylinder 1 are provided with and allow hydraulic medium and particulate matter to fall into through hole 13 in the described deposition tank 9.
Described power plant 3 are connecting rod.
Technical conceive of the present utility model is: on the basis of conventional diaphragm pump oil hydraulic cylinder is improved.Increased and drive piston 5 isodiametric diaphragm piston 4 and bellowss 7, utilized diaphragm piston 4 that fed sheet of a media and hydraulic medium are separated; By bellows 7 the oil hydraulic cylinder inner chamber is divided into preceding sub-chamber 11 and sub-chamber 12, back, makes the motion in different zones of drive piston 5 and diaphragm piston 4; Simultaneously, through hole 43 is set on diaphragm piston 4, makes the pressure of the hydraulic medium that is positioned at barrier film 42 both sides and fed sheet of a media identical, the variation in pressure of media cavity 2 and oil hydraulic cylinder inner chamber is synchronous.
Power plant 3 will rotatablely move and be converted into to-and-fro motion, and power plant 3 drive piston rod 51 to-and-fro motion of drive piston 5, and this to-and-fro motion is passed to diaphragm piston 4 through connecting rod 6, diaphragm piston bar 44.
In discharging defeated process, suction valve 21 cuts out, and drive piston 5 travels forward, and hydraulic medium pressure raises, and promotes diaphragm piston 4 and travels forward, thereby the fed sheet of a media pressure of barrier film 42 front surfaces is raise, and expulsion valve 22 is opened, and discharges medium.
In suction process, expulsion valve 22 cuts out, and drive piston 5 moves backward, and hydraulic medium pressure descends, and promotes diaphragm piston 4 and travels forward, and the fed sheet of a media pressure of barrier film 42 front surfaces is descended, and suction valve 21 is opened, and sucks medium in the media cavity 2.
Because drive piston 5 is identical with diaphragm piston 4 external diameters, under the prerequisite of ignoring machining error and compressibility of the medium energy, the oil hydraulic cylinder cavity volume in theory will be less than changing, thereby the barrier film on the medium transport process septation piston does not have distortion or has very little deformation, and the life-span that barrier film uses is long.
To-and-fro motion along with diaphragm piston 4, it fixedly is the bellows 5 realization to-and-fro motion synchronously on the connecting rod 6, the middle footpath of its bellows 7 is identical with diaphragm piston 4 external diameters, like this in the to-and-fro motion engineering, two regional volumes that bellows 7 is separated are constant substantially, make the exchange that the hydraulic medium in two zones can be the least possible.
The described content of this specification embodiment only is enumerating the way of realization of model utility design; protection domain of the present utility model should not be regarded as only limiting to the concrete form that embodiment states, protection domain of the present utility model also reach in those skilled in the art according to the utility model design the equivalent technologies means that can expect.
Claims (6)
1. the reciprocating hydraulic diaphragm pump that does not have three control valve units, comprise oil hydraulic cylinder and piston adaptive with described oil hydraulic cylinder and that be tightly connected, the front end of described oil hydraulic cylinder is provided with the media cavity of holding fed sheet of a media, the rear end of described oil hydraulic cylinder is provided with and promotes the power plant of described piston along the oil hydraulic cylinder axially reciprocating, and described piston is by piston rod and the interlock of described power plant;
It is characterized in that: described piston comprises diaphragm piston that is connected with described media cavity and the drive piston that is connected with described power plant, described diaphragm piston is connected with described drive piston by connecting rod, and described diaphragm piston is identical with the external diameter of drive piston;
Described diaphragm piston comprises piston body and the barrier film that is arranged on the described piston body, described piston body is provided with the through hole that allows hydraulic medium to pass through, and the front surface of described barrier film contacts with described fed sheet of a media, the rear surface contacts with described hydraulic medium;
Be provided with the bellows that allows hydraulic medium to penetrate and stop particulate matter to penetrate between described diaphragm piston and the drive piston, the front end of described bellows is affixed by forward flange and described connecting rod, the rear end is affixed by rear flange and described oil hydraulic cylinder;
The sub-chamber in sub-chamber and back before described bellows is divided into described oil hydraulic cylinder, described diaphragm piston is positioned at described preceding sub-chamber, and described drive piston is positioned at sub-chamber, described back.
2. the reciprocating hydraulic diaphragm pump of nothing three control valve units as claimed in claim 1, it is characterized in that: described bellows comprises the body that the filter cloth that stops particulate matter to penetrate by allowing hydraulic medium to penetrate is made, support ring and the positioning ring of arranging along the axial space of bellows body and be positioned at the bellows body, allow described connecting rod insertion and its connecting rod cover of sliding;
Described connecting rod cover is affixed with described forward flange, and described rear flange center is provided with the through hole that allows described connecting rod and connecting rod cover to pass;
The outer ring of described support ring and described bellows body are affixed, and the inner ring of described support ring allows described connecting rod cover to insert and slides in it;
Described positioning ring and described bellows body are affixed, and the diameter of described positioning ring is less than the external diameter of described support ring.
3. the reciprocating hydraulic diaphragm pump of nothing three control valve units as claimed in claim 2 is characterized in that: the body periphery of described bellows is provided with cylindrical diaphragm, and the front end of described cylindrical diaphragm and described bellows body are affixed, rear end and described rear flange are affixed.
4. the reciprocating hydraulic diaphragm pump of nothing three control valve units as claimed in claim 3 is characterized in that: described diaphragm piston rear end is fixed with the diaphragm piston bar, and described diaphragm piston bar is affixed by clip and described connecting rod; The piston rod of described drive piston is connected with described power plant.
5. as the reciprocating hydraulic diaphragm pump of described nothing three control valve units of one of claim 1-4, it is characterized in that: the affixed deposition tank in described oil hydraulic cylinder bottom, the casing wall of described oil hydraulic cylinder are provided with and allow hydraulic medium and particulate matter to fall into the interior through hole of described deposition tank.
, the reciprocating hydraulic diaphragm pump of nothing as claimed in claim 5 three control valve units, it is characterized in that: described power plant are connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202908047U CN201810531U (en) | 2010-08-13 | 2010-08-13 | Reciprocating type hydraulic diaphragm pump of three-valve free device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202908047U CN201810531U (en) | 2010-08-13 | 2010-08-13 | Reciprocating type hydraulic diaphragm pump of three-valve free device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201810531U true CN201810531U (en) | 2011-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202908047U Expired - Lifetime CN201810531U (en) | 2010-08-13 | 2010-08-13 | Reciprocating type hydraulic diaphragm pump of three-valve free device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201810531U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907085A (en) * | 2010-08-13 | 2010-12-08 | 浙江工业大学 | Reciprocating type hydraulic diaphragm pump without three-way valve device |
| CN114856954A (en) * | 2022-07-07 | 2022-08-05 | 中建环能科技股份有限公司 | Piston pump and wastewater treatment device with same |
-
2010
- 2010-08-13 CN CN2010202908047U patent/CN201810531U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907085A (en) * | 2010-08-13 | 2010-12-08 | 浙江工业大学 | Reciprocating type hydraulic diaphragm pump without three-way valve device |
| CN101907085B (en) * | 2010-08-13 | 2012-01-18 | 浙江工业大学 | Reciprocating type hydraulic diaphragm pump without three-way valve device |
| CN114856954A (en) * | 2022-07-07 | 2022-08-05 | 中建环能科技股份有限公司 | Piston pump and wastewater treatment device with same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110427 Effective date of abandoning: 20120118 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110427 Effective date of abandoning: 20120118 |