CA2591378A1 - Gas-operated diaphragm dosing pump - Google Patents
Gas-operated diaphragm dosing pump Download PDFInfo
- Publication number
- CA2591378A1 CA2591378A1 CA002591378A CA2591378A CA2591378A1 CA 2591378 A1 CA2591378 A1 CA 2591378A1 CA 002591378 A CA002591378 A CA 002591378A CA 2591378 A CA2591378 A CA 2591378A CA 2591378 A1 CA2591378 A1 CA 2591378A1
- Authority
- CA
- Canada
- Prior art keywords
- gas
- drive
- diaphragm
- drive head
- dosing pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000007789 gas Substances 0.000 claims abstract description 74
- 239000002343 natural gas well Substances 0.000 claims abstract description 5
- 239000002671 adjuvant Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 6
- 230000009977 dual effect Effects 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 3
- 230000004941 influx Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
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
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/06—Pumps having fluid drive
- F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
In a diaphragm dosing pump with a gas-operated drive, in particular for adding in a dosed manner adjuvants into gas pipelines, for example a natural gas well, having a drive head (11) for the diaphragm dosing pump (1), a drive rod (13) moving back and forth in a cylinder chamber (12) of the drive head (11), which carries a drive part (14) separating the cylinder chamber (12) into two chambers (15, 16) and is effectively connected to the piston rod (3) of the diaphragm dosing pump (1), a feeding pipeline (19) connected to the cylinder chamber (12) of the drive head (11) for pressurized gas from the gas pipeline (18) and a control valve (20) between the gas feeding pipeline (19) as well as an outlet (21) for the relaxed gas to return to the gas pipeline (18), the arrangement is made such that the drive head (11) of the diaphragm dosing pump (1) is embodied as a simply operating gas drive such that only the pressure stroke side (15) of the drive head (11) is connected via the control valve (20) to the pressurized gas feeding pipeline (19) while the suction stroke side (16) of the drive head (11) is connected at all times to the gas outlet (21) and that on the suction stroke side of the drive head (11) a spring (17) is provided, which acts upon the drive part (14) in the direction of the suction stroke.
Description
DE 10 2006 027 208.0 is incorporated herein by reference LEWA GmbH
Ulmer Str. 10 D-71229 Leonberg GAS-OPERATED DIAPHRAGM DOSING PUMP
The invention relates to a diaphragm dosing pump with a gas-operated drive, in particular for dosing adjuvants in gas pipelines, for example a natural gas well, according to the preamble of claim 1.
The invention also relates to a method for controlling said gas-operated drive according to the preamble of claim 10.
Dosing pumps with gas-operated drives have been known for quite some time and are preferably used for dosing adjuvants, e.g., corrosion inhibitors, in gas pipelines near or at a natural gas well. Gas wells are sometimes little productive and distributed dispersed in remote areas, so that electric energy for driving a dosing pump can only be provided under great expense. Therefore, preferably the gas of the gas well itself is used as the pressure medium for driving the dosing pump. In the past, the gas used was usually blown off into the environment, which is undesirable, of course, for energy economical reasons as well as pollution.
In order to avoid this it has been known (US 6,694,858) to provide such a gas drive as the drive for an oscillating displacement pump, in which the pressurized gas taken from the gas pipeline is fed via an appropriate control valve to the displacement pump such that alternating it impinges both sides of the displacement piston andlor operates it both in the pressurized stroke direction as well as in the suction stroke direction, upon which then the pressurized gas is returned to the gas pipeline at the low-pressure side.
Ulmer Str. 10 D-71229 Leonberg GAS-OPERATED DIAPHRAGM DOSING PUMP
The invention relates to a diaphragm dosing pump with a gas-operated drive, in particular for dosing adjuvants in gas pipelines, for example a natural gas well, according to the preamble of claim 1.
The invention also relates to a method for controlling said gas-operated drive according to the preamble of claim 10.
Dosing pumps with gas-operated drives have been known for quite some time and are preferably used for dosing adjuvants, e.g., corrosion inhibitors, in gas pipelines near or at a natural gas well. Gas wells are sometimes little productive and distributed dispersed in remote areas, so that electric energy for driving a dosing pump can only be provided under great expense. Therefore, preferably the gas of the gas well itself is used as the pressure medium for driving the dosing pump. In the past, the gas used was usually blown off into the environment, which is undesirable, of course, for energy economical reasons as well as pollution.
In order to avoid this it has been known (US 6,694,858) to provide such a gas drive as the drive for an oscillating displacement pump, in which the pressurized gas taken from the gas pipeline is fed via an appropriate control valve to the displacement pump such that alternating it impinges both sides of the displacement piston andlor operates it both in the pressurized stroke direction as well as in the suction stroke direction, upon which then the pressurized gas is returned to the gas pipeline at the low-pressure side.
For this purpose it is necessary for a certain pressure difference to be present in the gas pipeline, e.g., at a constriction of the pipeline or at a flow meter created, for example, in the form of a metering orifice, or that the pressure difference is artificially created by the use of a throttle.
This known gas drive is disadvantageous, though, in that the entire-construction including the associated control is designed rather expensive and that the gas consumption is very high.
The invention is therefore based on the object to provide the diaphragm dosing pump of the generic type for avoiding the disadvantages shown such that the gas drive is designed in a very simple constructive manner and only shows low gas consumption.
Additionally, a simple method shall be provided to control such a drive.
This object is attained by the invention using the features of claim 1 and/or claim 10.
Advantageous embodiments thereof are described in the other claims.
The invention is based on the idea to embody the drive head of the diaphragm dosing pump as a simply operating gas drive, namely such that only the pressure stroke side of the drive head is connected to the feeding pipeline of the pressurized gas via the control valve, while a spring is attached on the side of the suction stroke of the drive head, which affects the drive part in the direction of the suction stroke. Additionally, the suction stroke side of the drive head is connected at all times to the pressurized gas outlet, i.e., to the area of the lower gas pressure. This way an essential advantage results in that the drive can be operated independently of the amount of pressure in the pipeline.
In the embodiment according to the invention the control valve is designed such that it opens the feeding pipeline of the pressurized gas towards the pressure stroke side of the drive head for performing the pressure stroke of the drive head, while the suction stroke for removing the gas then relaxed causes the gas output to be opened.
This known gas drive is disadvantageous, though, in that the entire-construction including the associated control is designed rather expensive and that the gas consumption is very high.
The invention is therefore based on the object to provide the diaphragm dosing pump of the generic type for avoiding the disadvantages shown such that the gas drive is designed in a very simple constructive manner and only shows low gas consumption.
Additionally, a simple method shall be provided to control such a drive.
This object is attained by the invention using the features of claim 1 and/or claim 10.
Advantageous embodiments thereof are described in the other claims.
The invention is based on the idea to embody the drive head of the diaphragm dosing pump as a simply operating gas drive, namely such that only the pressure stroke side of the drive head is connected to the feeding pipeline of the pressurized gas via the control valve, while a spring is attached on the side of the suction stroke of the drive head, which affects the drive part in the direction of the suction stroke. Additionally, the suction stroke side of the drive head is connected at all times to the pressurized gas outlet, i.e., to the area of the lower gas pressure. This way an essential advantage results in that the drive can be operated independently of the amount of pressure in the pipeline.
In the embodiment according to the invention the control valve is designed such that it opens the feeding pipeline of the pressurized gas towards the pressure stroke side of the drive head for performing the pressure stroke of the drive head, while the suction stroke for removing the gas then relaxed causes the gas output to be opened.
This means that, in the sense of the invention, the oscillating motion of the gas drive occurs in a very simple manner, preferably controlled mechanically, by switching on the influx of pressurized gas for the pressure stroke of the drive head. In contrast, in an extraordinarily simple constructive manner the spring force is used for the suction stroke of the drive head, which then returns the now relaxed gas located in the cylinder space of the drive head at the side of the pressure stroke into the gas pipeline, namely at the low-pressure side.
Preferably, a diaphragm pump head with a hydraulic diaphragm drive is used as the dosing unit. This provides two essential advantages, namely that, on the one hand, the dosing occurs leak-free and, on the other hand, the piston moving back and forth in the hydraulic oil operates almost without any friction.
Therefore, only the pressure stroke of the drive head and thus also the diaphragm pump head requires only a certain low pressure force to overcome the spring force.
Therefore, in addition to this pressure force practically no additional forces are to be considered or to be overcome, because the friction force is negligibly low in reference to the pressure force.
For this reason it is possible to operate the diaphragm dosing pump by the gas-operated drive according to the invention even when there is a very low pressure difference in the gas pipeline, for example, less than 0.5 bar.
The gas-operated drive according to the invention therefore uses the energy of the gas transported in the gas pipeline only for the pressure stroke of the drive head. In contrast thereto, the suction stroke occurs via spring force. This way the control overall is designed much simpler and more cost-effective than the known drives using a dual-action drive.
In another embodiment of the invention it is advantageous for the drive head to be embodied as a diaphragm drive, with its drive part being a diaphragm member.
This way the friction loss can be reduced to a minimum so that the drive can be operated under an even lower pressure difference in the gas pipeline.
The diaphragm member of the gas-operated diaphragm drive can be a single diaphragm, a dual diaphragm, or a roller diaphragm.
Instead thereof, it is also possible to provide a piston drive as the drive head, with its driving part being a piston.
The method according to the invention for controlling the gas-operated drive is explained in greater detail in claims 10 through 12.
In the following, the invention is explained in greater detail using the drawings. Here it shows:
Fig: 1 schematically in a cross-section a diaphragm dosing pump with a very simply operating gas drive in the form of a drive head, which is embodied as a diaphragm drive having a single diaphragm;
Fig: 2 a modified embodiment with a simply operating gas drive in the form of a diaphragm drive having a dual diaphragm, and Fig. 3 another modified embodiment with a gas drive in the form of a piston drive.
As discernible from Fig. 1, a diaphragm dosing pump 1 is provided, which in the exemplary embodiment shown is embodied as a diaphragm pump with a hydraulically operating diaphragm drive. For this purpose the diaphragm dosing pump 1 is provided with a piston rod 3, moving back and forth in a pump body 2, which acts upon an operating chamber 4, filled with hydraulic oil and formed in a pump body 2, in the sense of a pressure stroke-in Fig. 1 in the movement towards the left, and/or a suction stroke, in Fig. 1 in the movement towards the right.
The pump body 2 is closed by a pump lid 5, in which a conveying space 6 is formed for conveying a dosing medium via an inlet valve 7 as well as an outlet valve 8.
The operating chamber 4 and the conveying chamber 6 are separated by a diaphragm 9, which is stretched between the pump body 2 and the pump lid 5 and which is operated via the piston rod 3 axially moving back and forth over the hydraulic oil located in the operating chamber 4 in the sense of a pressure stroke as well as a suction stroke.
The piston rod 3 of the diaphragm dosing pump 1 is mechanically operated, namely by a gas-operated drive 10, which is embodied as a simply operating gas drive. For this purpose a drive head 11 is provided, which encloses a cylinder chamber 12.
Here, a drive rod 13 is mobile back and forth, which on the one side at its end protruding from the cylinder chamber 12 of the drive head 11 is connected to the piston rod 3 of the diaphragm dosing pump 1 and/or embodied with it in one piece and on the other side it carries a drive part 14 in the form of a simple diaphragm at its end located in the cylinder chamber 12 of the drive head 11. Said diaphragm separates the cylinder chamber 12 of the drive head 11 into two chambers in the manner shown, namely into a pressure stroke side chamber 15 as well as a suction stroke side chamber 16.
In the suction stroke side chamber 16 of the drive head 11 a pressure spring 17 is arranged on the drive rod 13, which on the one side is supported at the wall of the cylinder chamber 12 as well as on the other side at a single diaphragm 14 and/or at its carrier part such that therefore the single diaphragm 14 is spring-loaded in the direction of the suction stroke of the drive head 11-in Fig. 1 towards the right.
At the same time, the suction stroke side chamber 16 is also constantly connected to the gas output 21, so that the suction stroke side chamber 16 always acts upon the lower gas pressure P2.
The pressure stroke of the drive head 11-in Fig. 1 towards the left-is caused by the pressurized gas such that the gas pipeline 18 is taken, for example, at or near a natural gas well at a location P1 with a higher pressure and is fed via a feeding pipeline 19 to the pressure stroke side chamber 15 of the drive head 11.
Additionally, a control valve 20 is provided in the feeding pipeline 19, which guides the relaxed gas back into the primary gas pipeline 18 via an output 21, after it has executed the pressure stroke in the pressure stroke side chamber 15, namely at a downstream located site P2 with a lower gas pressure. Here, a pressure difference between P 1 and P2 of less than 0.5 bar is sufficient, as already shown, in order to operate the drive head 11, i.e., to impinge the pressure stroke side chamber 15 with pressurized gas in the sense of a pressure stroke. The pressure difference may be created, for example, by a blind 23 in the pipeline 18.
The control valve 20 is designed such that it opens the pressured gas influx via the feeding pipeline 19 to the pressure stroke side 15 of the drive had 11 for performing the pressure stroke of the drive head 11-in Fig. I towards the left-while in the suction stroke of the drive head 11-in Fig. 1 towards the right-it opens the outlet 21 to remove the gas then relaxed so that the relaxed gas is returned via this output 21 at the location P2 having a lower gas pressure in the primary gas pipeline 18.
The control of the control valve 20 occurs mechanically in the manner shown via rods 22, which can be operated in turn via the respective axial position of the drive rod 13 of the drive head 11 and/or the piston rod 3 of the diaphragm dosing pump 1.
The modified embodiment according to claim Fig. 2 is different from the one according to Fig. 1 only in that instead of the single diaphragm 14 of the drive head.11, a dual diaphragm 14' is provided.
In an appropriate manner, in the embodiment according to Fig. 3, the drive head is not embodied as a diaphragm drive but as a piston drive, with its drive part being a piston 1491. ' Reference is made explicitly to the claims as well as the drawing with regard to features of the invention not explained in greater detail above.
Preferably, a diaphragm pump head with a hydraulic diaphragm drive is used as the dosing unit. This provides two essential advantages, namely that, on the one hand, the dosing occurs leak-free and, on the other hand, the piston moving back and forth in the hydraulic oil operates almost without any friction.
Therefore, only the pressure stroke of the drive head and thus also the diaphragm pump head requires only a certain low pressure force to overcome the spring force.
Therefore, in addition to this pressure force practically no additional forces are to be considered or to be overcome, because the friction force is negligibly low in reference to the pressure force.
For this reason it is possible to operate the diaphragm dosing pump by the gas-operated drive according to the invention even when there is a very low pressure difference in the gas pipeline, for example, less than 0.5 bar.
The gas-operated drive according to the invention therefore uses the energy of the gas transported in the gas pipeline only for the pressure stroke of the drive head. In contrast thereto, the suction stroke occurs via spring force. This way the control overall is designed much simpler and more cost-effective than the known drives using a dual-action drive.
In another embodiment of the invention it is advantageous for the drive head to be embodied as a diaphragm drive, with its drive part being a diaphragm member.
This way the friction loss can be reduced to a minimum so that the drive can be operated under an even lower pressure difference in the gas pipeline.
The diaphragm member of the gas-operated diaphragm drive can be a single diaphragm, a dual diaphragm, or a roller diaphragm.
Instead thereof, it is also possible to provide a piston drive as the drive head, with its driving part being a piston.
The method according to the invention for controlling the gas-operated drive is explained in greater detail in claims 10 through 12.
In the following, the invention is explained in greater detail using the drawings. Here it shows:
Fig: 1 schematically in a cross-section a diaphragm dosing pump with a very simply operating gas drive in the form of a drive head, which is embodied as a diaphragm drive having a single diaphragm;
Fig: 2 a modified embodiment with a simply operating gas drive in the form of a diaphragm drive having a dual diaphragm, and Fig. 3 another modified embodiment with a gas drive in the form of a piston drive.
As discernible from Fig. 1, a diaphragm dosing pump 1 is provided, which in the exemplary embodiment shown is embodied as a diaphragm pump with a hydraulically operating diaphragm drive. For this purpose the diaphragm dosing pump 1 is provided with a piston rod 3, moving back and forth in a pump body 2, which acts upon an operating chamber 4, filled with hydraulic oil and formed in a pump body 2, in the sense of a pressure stroke-in Fig. 1 in the movement towards the left, and/or a suction stroke, in Fig. 1 in the movement towards the right.
The pump body 2 is closed by a pump lid 5, in which a conveying space 6 is formed for conveying a dosing medium via an inlet valve 7 as well as an outlet valve 8.
The operating chamber 4 and the conveying chamber 6 are separated by a diaphragm 9, which is stretched between the pump body 2 and the pump lid 5 and which is operated via the piston rod 3 axially moving back and forth over the hydraulic oil located in the operating chamber 4 in the sense of a pressure stroke as well as a suction stroke.
The piston rod 3 of the diaphragm dosing pump 1 is mechanically operated, namely by a gas-operated drive 10, which is embodied as a simply operating gas drive. For this purpose a drive head 11 is provided, which encloses a cylinder chamber 12.
Here, a drive rod 13 is mobile back and forth, which on the one side at its end protruding from the cylinder chamber 12 of the drive head 11 is connected to the piston rod 3 of the diaphragm dosing pump 1 and/or embodied with it in one piece and on the other side it carries a drive part 14 in the form of a simple diaphragm at its end located in the cylinder chamber 12 of the drive head 11. Said diaphragm separates the cylinder chamber 12 of the drive head 11 into two chambers in the manner shown, namely into a pressure stroke side chamber 15 as well as a suction stroke side chamber 16.
In the suction stroke side chamber 16 of the drive head 11 a pressure spring 17 is arranged on the drive rod 13, which on the one side is supported at the wall of the cylinder chamber 12 as well as on the other side at a single diaphragm 14 and/or at its carrier part such that therefore the single diaphragm 14 is spring-loaded in the direction of the suction stroke of the drive head 11-in Fig. 1 towards the right.
At the same time, the suction stroke side chamber 16 is also constantly connected to the gas output 21, so that the suction stroke side chamber 16 always acts upon the lower gas pressure P2.
The pressure stroke of the drive head 11-in Fig. 1 towards the left-is caused by the pressurized gas such that the gas pipeline 18 is taken, for example, at or near a natural gas well at a location P1 with a higher pressure and is fed via a feeding pipeline 19 to the pressure stroke side chamber 15 of the drive head 11.
Additionally, a control valve 20 is provided in the feeding pipeline 19, which guides the relaxed gas back into the primary gas pipeline 18 via an output 21, after it has executed the pressure stroke in the pressure stroke side chamber 15, namely at a downstream located site P2 with a lower gas pressure. Here, a pressure difference between P 1 and P2 of less than 0.5 bar is sufficient, as already shown, in order to operate the drive head 11, i.e., to impinge the pressure stroke side chamber 15 with pressurized gas in the sense of a pressure stroke. The pressure difference may be created, for example, by a blind 23 in the pipeline 18.
The control valve 20 is designed such that it opens the pressured gas influx via the feeding pipeline 19 to the pressure stroke side 15 of the drive had 11 for performing the pressure stroke of the drive head 11-in Fig. I towards the left-while in the suction stroke of the drive head 11-in Fig. 1 towards the right-it opens the outlet 21 to remove the gas then relaxed so that the relaxed gas is returned via this output 21 at the location P2 having a lower gas pressure in the primary gas pipeline 18.
The control of the control valve 20 occurs mechanically in the manner shown via rods 22, which can be operated in turn via the respective axial position of the drive rod 13 of the drive head 11 and/or the piston rod 3 of the diaphragm dosing pump 1.
The modified embodiment according to claim Fig. 2 is different from the one according to Fig. 1 only in that instead of the single diaphragm 14 of the drive head.11, a dual diaphragm 14' is provided.
In an appropriate manner, in the embodiment according to Fig. 3, the drive head is not embodied as a diaphragm drive but as a piston drive, with its drive part being a piston 1491. ' Reference is made explicitly to the claims as well as the drawing with regard to features of the invention not explained in greater detail above.
Claims (12)
1. A diaphragm dosing pump with a gas-operated drive, in particular for dosing adjuvants into gas pipelines, for example of a natural gas well, - having a drive head (11) for the diaphragm dosing pump (1), - a drive rod (13) that can move back and forth in a cylinder chamber (12) of the drive head (11), which carries a drive part (14) separating the cylinder chamber (12) into two chambers (15, 16) and being in an effective connection to the piston rod (3) of the diaphragm dosing pump (1), - a feeding pipeline (19) connected to the cylinder chamber (12) of the drive head (11) for pressurized gas from the gas pipeline (18), and - a control valve (20) between the gas feeding pipeline (19) as well as an outlet (21) for the relaxed gas to return into the gas pipeline (18), characterized in that the drive head (11) of the diaphragm dosing pump (1) is embodied as a simple operating gas drive such that only the pressure stroke side (15) of the drive head (11) is connected via the control valve (20) to the pressurized gas feeding pipeline (19), while the suction stroke side (16) of the drive head (11) is connected at all times to the gas outlet (21), and that a spring (17) at the suction stroke side (16) of the drive head (11) is arranged acting in the direction of the suction stroke upon the drive part (14).
2. A diaphragm dosing pump according to claim 1, characterized in that the control valve (20) is embodied such that for performing the pressure stroke of the drive head (11) the pressurized gas feeding pipeline (19) is opened towards the pressure stroke side (15) of the drive head, while at the suction stroke opening the gas outlet (21) for removing the gas then relaxed.
3. A diaphragm dosing pump according to claim 1 or 2, characterized in that the control of the control valve (20) occurs mechanically via rods (22), that for their part can be operated via the respective axial alignment of the piston rod (3) of the diaphragm dosing pump (1) and/or the drive rod (13) of the drive head (11).
4. A diaphragm dosing pump according to one of the previous claims, characterized in that the dosing pump (1) operated by the gas drive (10) is a hydraulically operating diaphragm pump, with its piston rod (3) being in an effective connection and/or embodied in one piece with the drive rod (13) of the drive head (11).
5. A diaphragm dosing pump according to one of the previous claims, characterized in that the drive head (11) is a diaphragm drive, with its driving part being a diaphragm member (14).
6. A diaphragm dosing pump according to claim 5, characterized in that the diaphragm member is a single diaphragm (14).
7. A diaphragm dosing pump according to claim 5, characterized in that the diaphragm member is a dual diaphragm (14').
8. A diaphragm dosing pump according to claim 5, characterized in that the diaphragm member is a rolling diaphragm.
9. A diaphragm dosing pump according to one of the claims 1 through 4, characterized in that the drive head (11) is a piston drive, with its driving part being a piston (14").
10. A method for controlling the gas operated drive of the diaphragm dosing pump embodied according to one of the previous claims, characterized in that the oscillating movement of the drive head is performed, on the one hand, at the pressure stroke by impinging the pressure stroke side chamber of the drive head with pressurized gas as well, as on the other hand, at the suction stroke by impinging the suction stroke side chamber of the drive head with a spring force.
11. A method according to claim 10, characterized in that the pressure stroke of the drive head is introduced by opening the connection between the pressurized gas feeding pipeline and/or the location of the pipeline with higher pressure and the pressure stroke side chamber of the drive head.
12. A method according to claim 10 or 11, characterized in that the suction stroke of the drive head is introduced by closing the connection between the pressurized gas feeding pipeline and the pressure stroke side chamber of the drive head as well as by opening the connection between said chamber and the location of the pipeline with a lower pressure and then being executed by the spring force.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006027208.0 | 2006-06-12 | ||
| DE102006027208A DE102006027208A1 (en) | 2006-06-12 | 2006-06-12 | Membrane dosing pump for dosing e.g. corrosion protection agents, has drive head with pressure stroke side that is connected with inlet line through control valve when delivery stroke side is connected with outlet line at time period |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2591378A1 true CA2591378A1 (en) | 2007-12-12 |
Family
ID=38663836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002591378A Abandoned CA2591378A1 (en) | 2006-06-12 | 2007-06-12 | Gas-operated diaphragm dosing pump |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20080003117A1 (en) |
| CA (1) | CA2591378A1 (en) |
| DE (1) | DE102006027208A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244827A (en) * | 2012-06-21 | 2013-08-14 | 中国石油大学(北京) | Piston-type natural gas pipeline feeding machine |
| CN111734605A (en) * | 2020-06-28 | 2020-10-02 | 江苏承运弘大科技有限公司 | A gas collection pump |
| CN111928117A (en) * | 2020-08-05 | 2020-11-13 | 森诺科技有限公司 | Natural gas pipeline accumulated liquid removing method and foam discharging agent injection equipment |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661262B (en) * | 2012-06-07 | 2014-09-24 | 张家政 | Submergible pneumatic pump for rapidly discharging accumulated water under tunnel bridge |
| DE102012221832A1 (en) * | 2012-11-29 | 2014-06-05 | Robert Bosch Gmbh | Metering pump, pump element for the metering pump and method for producing a pump element for a metering pump |
| RU2527001C1 (en) * | 2013-05-07 | 2014-08-27 | федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Пермский национальный исследовательский политехнический университет" | Proportioning pump |
| CN103511213B (en) * | 2013-09-13 | 2016-02-24 | 张利 | Double-valve-plate air-pressure liquid pump |
| JP6265158B2 (en) * | 2015-03-27 | 2018-01-24 | 横河電機株式会社 | Electronics |
| DE102019125998B4 (en) * | 2019-09-26 | 2022-01-05 | Audi Ag | Membrane dispenser |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4379680A (en) * | 1979-08-22 | 1983-04-12 | Vapor Corporation | Ambient air timing device |
| US5279504A (en) * | 1992-11-02 | 1994-01-18 | Williams James F | Multi-diaphragm metering pump |
| CA2357533A1 (en) * | 2001-08-29 | 2003-02-28 | Edward C. Grimes | Recirculating linear gas drive system |
-
2006
- 2006-06-12 DE DE102006027208A patent/DE102006027208A1/en not_active Withdrawn
-
2007
- 2007-06-12 US US11/808,779 patent/US20080003117A1/en not_active Abandoned
- 2007-06-12 CA CA002591378A patent/CA2591378A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244827A (en) * | 2012-06-21 | 2013-08-14 | 中国石油大学(北京) | Piston-type natural gas pipeline feeding machine |
| CN103244827B (en) * | 2012-06-21 | 2015-09-09 | 中国石油大学(北京) | Piston type natural gas line batch charger |
| CN111734605A (en) * | 2020-06-28 | 2020-10-02 | 江苏承运弘大科技有限公司 | A gas collection pump |
| CN111928117A (en) * | 2020-08-05 | 2020-11-13 | 森诺科技有限公司 | Natural gas pipeline accumulated liquid removing method and foam discharging agent injection equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| US20080003117A1 (en) | 2008-01-03 |
| DE102006027208A1 (en) | 2007-12-13 |
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