CN112189094B - Diaphragm system controller with magnetically held closure element - Google Patents
Diaphragm system controller with magnetically held closure element Download PDFInfo
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- CN112189094B CN112189094B CN201980031363.2A CN201980031363A CN112189094B CN 112189094 B CN112189094 B CN 112189094B CN 201980031363 A CN201980031363 A CN 201980031363A CN 112189094 B CN112189094 B CN 112189094B
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- diaphragm
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- chamber
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- 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
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- 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
- F04B43/0009—Special features
- F04B43/0081—Special features systems, control, safety measures
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- 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
- F04B2201/00—Pump parameters
- F04B2201/02—Piston parameters
- F04B2201/0201—Position of the piston
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The present invention relates to a diaphragm pump having an output chamber and a working chamber, wherein the output chamber comprises a pressure pipe interface and a suction pipe interface, wherein the working chamber is filled or can be filled with hydraulic fluid, and wherein the working chamber is operatively connected with a pressure generating device for providing an oscillating pressure to the hydraulic fluid; the diaphragm pump further comprises a diaphragm having at least one diaphragm layer and a diaphragm core, the diaphragm separating the delivery chamber and the working chamber from each other, the diaphragm being movable from a pressure stroke position to a suction stroke position and back again; the volume of the delivery chamber at the pressure stroke position of the diaphragm is less than the volume of the delivery chamber at the suction stroke position of the diaphragm; the diaphragm is operatively connected or connectable with a diaphragm return means, the diaphragm return means comprising a pull rod which forces or enables to force the diaphragm in the direction of the suction stroke position; the diaphragm pump further comprises a storage chamber for containing the hydraulic fluid, the working chamber and the storage chamber being connected to each other by means of a channel closable by a closing element. The closing element is connected with the pull rod in a manner of being movable relative to the pull rod, so that the closing element can move from a closing position to an opening position and return; the closure member includes and/or is operatively connected to a magnet that locks the closure member in the closed position, the closure member moving to the open position and the passage opening when the diaphragm moves from the intake stroke position to the deflected over-pressure stroke position.
Description
Technical Field
The invention relates to a diaphragm system controller with a magnetically held closure element.
Background
A diaphragm pump has an output chamber comprising a suction pipe interface and a pressure pipe interface, and a working chamber separated from the output chamber by a diaphragm. For the transmission of a medium, the diaphragm is reciprocally movable in an oscillating manner between a first position and a second position, in which the working chamber is filled with a hydraulic fluid to which an oscillating pressure is applied. The two positions of the diaphragm are generally referred to herein as a pressure stroke position and a suction stroke position.
It is often the case that the pressure line connection is connected to the outlet chamber via a pressure valve in the form of a non-return valve, and the suction line connection is connected to the outlet chamber via a suction valve likewise in the form of a non-return valve. During the movement of the diaphragm from the first position to the second position, i.e. in the so-called suction stroke, the volume of the output chamber increases and thus the pressure in the output chamber decreases. As soon as the pressure in the outlet chamber drops below the pressure in the suction line connected to the suction line connection, the suction valve opens and the medium to be conveyed is sucked into the outlet chamber via the suction line connection. As soon as the diaphragm moves again from the second position in the direction of the first position, which is a so-called pressure stroke, the volume of the output chamber decreases and the pressure of the output chamber rises. The suction valve is closed to prevent the medium to be conveyed from flowing back into the suction line. As soon as the pressure in the outlet chamber exceeds the pressure in the pressure line connected to the pressure connection, the pressure valve opens, as a result of which the medium to be conveyed present in the outlet chamber can be pressed into the pressure line.
In this case, the diaphragm itself can be elastically preloaded in the direction of the suction stroke position. At this time, the diaphragm is always in a position where the forces acting on the diaphragm cancel each other out. Under normal conditions, the resultant of the force generated by the fluid pressure in the output chamber and the force generated by the resilient preload in the direction of the suction stroke position acts in opposition to the force generated by the fluid pressure in the working chamber.
Thus, the application of a vibratory pressure to the hydraulic fluid causes a vibratory movement of the diaphragm and, in association therewith, a vibratory pumping operation of the fluid to be conveyed out of the suction line and into the pressure line.
Hydraulically operated membrane pumps are preferably suitable for the transfer of fluids to be transferred under high pressure conditions, since a uniform loading of the membrane with hydraulic fluid is achieved, so that the membrane has a long service life.
Here, the pressurization of the hydraulic fluid by the oscillating pressure is usually achieved by means of a moving piston. Here, it may be the case that if there is a large amount of dirt at the suction valve or hydraulic fluid flows by-passing the piston, the amount of fluid in the working chamber deviates from the expected amount. In this case it is possible that too much hydraulic fluid accumulates in the working chamber and thus deflects the diaphragm beyond its pressure stroke position, or that too little hydraulic fluid is present in the working chamber and thus the diaphragm cannot reach the pressure stroke position. In the first case, there is a risk of overloading the membrane, reducing its service life and possibly causing its damage. In the second case, the delivery amount per stroke is undesirably reduced.
Ideally, the supply of the membrane pump should be ensured under all load and operating conditions in order to avoid damage to the membrane pump, in particular to the membrane itself. Malfunctions, for example, due to an occlusion or soiling of the suction line, are particularly problematic here. In this case, too little or no fluid to be delivered is introduced into the delivery chamber during the suction stroke. The force exerted by the fluid pressure in the delivery chamber interacts with the force generated by the fluid pressure in the working chamber and the force generated by the resilient preload, whereas, unlike normal operating conditions, the diaphragm may be deflected beyond the pressure stroke position because the fluid pressure in the delivery chamber is too low due to too little amount of fluid to be delivered in the delivery chamber.
Solutions to the problem are described in the prior art, for example, DE102013105072A1 discloses a solution according to which a movement of the diaphragm beyond the pressure stroke position causes a passage to the hydraulic fluid storage chamber to open, as a result of which the pressure of the working chamber is automatically reduced. For this purpose, the closing element is located on the return element of the diaphragm and is subjected to a pressure generated by means of an elastic force in order to close off the passage between the working chamber and the storage chamber. If the diaphragm is moved beyond the pressure stroke, the closing element will move away from the passage so that the passage is open and the pressure between the working chamber and the storage chamber is equalized. This causes the pressure in the working chamber to drop and the return element moves the diaphragm again in the direction of the suction stroke position.
However, the solution known from DE102013105072A1 has the disadvantage that the holding force of the closing element can vary due to the assembly tolerances of the elements used in the solution. It is therefore not possible to set a precise holding force of the closure element, in particular to ensure a precise holding force over a relatively long operating period. Furthermore, the closing function of the closing element described in this solution depends on the structural dimensions of the membrane against which the closing element, subjected to the force exerted by the elastic element, reacts and on the distance covered by the membrane. A further drawback is that the closing element cannot work without wear due to the transverse forces acting on the closing element.
Disclosure of Invention
It is therefore an object of the present invention to overcome the drawbacks of the prior art, and in particular to provide a membrane pump comprising a precise and wear-free shielding device which prevents damage to the membrane in case of failure.
The above object is achieved by a diaphragm pump having an output chamber and a working chamber, wherein the output chamber comprises a pressure pipe interface and a suction pipe interface, wherein the working chamber is filled or can be filled with hydraulic fluid, and wherein the working chamber is operatively connected to a pressure generating device for subjecting the hydraulic fluid to an oscillating pressure; the diaphragm pump further comprises a diaphragm having at least one diaphragm layer and a diaphragm core, the diaphragm separating the delivery chamber and the working chamber from each other, the diaphragm being movable from a pressure stroke position to a suction stroke position and back again; wherein the volume of the delivery chamber at the pressure stroke position of the diaphragm is less than the volume of the delivery chamber at the suction stroke position of the diaphragm; wherein the diaphragm is operatively connected or connectable with a diaphragm return means, the diaphragm return means comprising a pull rod forcing the diaphragm in the direction of a suction stroke position or being able to force the diaphragm in the direction of a suction stroke position; the diaphragm pump further comprises a storage chamber for containing the hydraulic fluid, wherein the working chamber and the storage chamber are connected to each other by means of a channel closable by a closing element, wherein the closing element is connected to the pull rod in a movable manner relative to the pull rod such that the closing element can be moved from a closed position to an open position and back; wherein the closure member comprises and/or is operatively associated with a magnet that locks the closure member in the closed position, wherein when the diaphragm is moved from the intake stroke position to the deflected over-pressure stroke position, the closure member moves to the open position and the passageway opens.
As mentioned before, under normal conditions the resultant of the force generated by the fluid pressure in the output chamber and the force which is resiliently preloaded in the direction of the suction stroke position is opposed by the action of the force generated by the fluid pressure in the working chamber. If too much working fluid is present in the working chamber, because the fluid pressure in the working chamber is too high, the diaphragm may deflect beyond the pressure stroke position in this case.
The invention is based on the surprising finding that a movement of the diaphragm beyond the pressure stroke position can be prevented in an effective manner if this is coupled with the opening process of the channel according to the invention. In this case, when the diaphragm is moved beyond the pressure stroke position, at which time the closure element opens the passage, the fluid pressure in the working chamber then drops. The maximum allowable offset of the diaphragm beyond the pressure stroke position can be defined by a selection of the magnetic force of the magnet comprised in the closure element or of a magnet operatively connected to the closure element.
According to the invention, it is defined here that the closure element is connected to the diaphragm return means and can be moved relative to the latter. This relative movement ensures that the passageway remains closed as long as the diaphragm is within a predetermined offset. Here, the magnet ensures the closed state of the channel.
Here, basically several embodiments for operatively connecting the magnet with the closure element are conceivable. According to the invention, it is preferred according to a first embodiment of the invention that the working chamber is arranged in a housing, wherein the housing comprises or forms a first magnet in the region of the passage, in particular around the passage, wherein the first magnet is operatively connected to the closure element at least when the closure element is in the closed position.
According to one embodiment, it has proved advantageous if the housing through which the channel passes is itself magnetic and/or comprises a magnet. In this way, the closing element, which is movably connected with the return means, can be locked in its position without itself comprising a magnet. Instead, the closure element is operatively connected to the magnetic field of the magnet integrated in the housing.
Alternatively or additionally, according to a second embodiment of the invention, it is advantageous for the closing element to comprise a second magnet, in particular in the region of its end facing the channel, in particular at the end facing the channel, wherein the second magnet is operatively connected to a housing surrounding the working chamber, in particular around the channel, at least in the closed position.
According to a second described embodiment, the membrane pump according to the invention comprises a second magnet as an alternative to said first magnet. In this case, the second magnet provided on the closure element is preferably provided on the end of the closure element facing the passage, so that the magnetic field of the second magnet can interact with the housing of the working chamber, preferably at the region of the passage, instead of mainly interacting with the return means.
Furthermore, according to a third embodiment of the invention, a combination of two magnets is also advantageous, wherein, according to the third embodiment, the closure element comprises a third magnet, in particular on and/or in the end region of the closure element facing the channel, and the housing surrounding the working chamber comprises or forms a fourth magnet in the region of the channel, in particular around the channel, wherein the regions of the third magnet and the fourth magnet facing each other have different polarities of their poles, and the third magnet and the fourth magnet are operatively connected to each other at least in the closed position.
The use of two magnets interacting with each other has proven to be advantageous, in particular, in order to provide a large force.
According to a further fourth embodiment, it can be defined that the pull rod comprises a fifth magnet, in particular arranged on and/or in the region of the end of the closure element facing away from the channel, and/or that the closure element comprises a sixth magnet, in particular arranged on the end of the closure element facing away from the channel, wherein the poles of the regions of the fifth magnet and the sixth magnet facing one another are of the same polarity, and that the fifth magnet and the sixth magnet are operatively connected to one another at least when the closure element is in the closed position.
According to the invention, it has proved advantageous if, instead of the attracting force, the closure of the passage by the closure element is provided by a pressure force acting on the closure element in the closing direction, which pressure force is generated by the mutual repulsion of the two magnets, the fifth magnet and the sixth magnet.
It has proved to be particularly advantageous here to fix the diaphragm releasably by means of a diaphragm retaining element which is introduced at least partially into the pull rod, wherein the fifth magnet is comprised in the diaphragm retaining element, in particular on or in the end region of the diaphragm retaining element which faces away from the diaphragm and is inserted into the pull rod.
According to the invention, the diaphragm is connected to the pull rod by means of the diaphragm holding element. The diaphragm holding element here generally comprises a rod-shaped element which can be passed through the central opening of the diaphragm layer and in particular comprises a thread and can be connected to a corresponding thread of the tie rod. Then, if the fifth magnet is integrated into the rod-like element, the fifth magnet can be easily reached, since the diaphragm can be replaced by removing the diaphragm holding element. Easy access to the sixth magnet is also possible.
Furthermore, according to a fifth embodiment of the invention, it is advantageous to include a seventh magnet, which is operatively connected to the closure element and to a housing which surrounds the working chamber, wherein the seventh magnet is not fixedly connected to the closure element, the pull rod and the housing, and wherein the magnetic field strength at the closure element and the resulting magnet attraction force are always greater than the magnetic field strength at the housing and the resulting magnet attraction force.
It is very important for the invention here that the closure element can reliably close the passage by means of the magnetic force generated by the magnet as long as the diaphragm does not move beyond the pressure stroke position.
According to an embodiment of the invention, the magnet may be connected to or integrated with the pull rod, the closure element and/or the housing. However, the invention is also very advantageously defined in that said magnet is not connected to and not integrated with the above-mentioned elements, but is only operatively connected to one or more of the above-mentioned elements.
For all embodiments of the invention it is advantageous that said first, second, third, fourth, fifth, sixth and/or seventh magnet is a spherical magnet, a bar magnet, a conical magnet, a disc magnet or a ring magnet.
Depending on the choice of magnet structure, the magnet itself can also form the closure element.
Here, it is advantageously defined that the magnetic field strength of the first magnet, the second magnet, the third magnet, the fourth magnet, the fifth magnet, the sixth magnet and/or the seventh magnet is selected in such a way that it is selected when the pressure p of the storage compartment is present 2 And the pressure p of said working chamber 1 To p is reached by the pressure difference between 2 -p 1 >a, where a is a predetermined pressure value, the closure member moves from the closed position to the open position.
This measure ensures that in the event of a loss of fluid in the working chamber, the fluid from the storage chamber can be used to replenish once the pressure in the working chamber falls below a predetermined value.
Furthermore, according to an embodiment of the present invention, it is preferred that the housing enclosing the working chamber has a wall element comprising the passage, wherein the wall element is movable within the housing relative to the housing in the direction of movement of the diaphragm return means, and wherein the wall element is preloaded by a spring element in the direction of the diaphragm return means.
Because of the movable arrangement of the wall element of the housing and thus also of the channel, the additional provision of an overpressure valve can be avoided. If the pressure in the working chamber increases very sharply, this will result in a movement of the wall element and thus of the passage at the inlet, as a result of which the closing element is moved away from the closed position and the passage is thus opened. Thus, by being connected with the storage chamber, the pressure in the working chamber is reduced again.
Here, in particular, the elastic preload of the wall element is selected in such a way that when the wall element is elastically preloaded, the elastic preload of the wall element is selected to be equal to the elastic preload of the wall elementPressure p of the working chamber 1 And the pressure p of the storage chamber 2 To a pressure difference of p 1 -p 2 >b, where b is a predetermined pressure value, the wall member is moved away from the closure member, with the result that the passageway is opened.
Finally, it may be defined that the diaphragm return means comprises a further spring element which is connected or operatively connected with the pull rod such that the diaphragm is preloaded by a force in the direction of the suction stroke position by means of the further spring element.
Drawings
Further features and advantages of the invention will be apparent from the following description in which exemplary embodiments of the invention are discussed, by way of illustration, without thereby restricting the invention.
In the drawings:
fig. 1 shows a detail of a first embodiment of a membrane pump according to the invention in a side sectional view;
fig. 2 shows a detail of a second embodiment of a membrane pump according to the invention in a side sectional view;
fig. 3 shows a detail of a third embodiment of a membrane pump according to the invention in a side sectional view; and the combination of (a) and (b),
fig. 4 shows a detail of a fourth embodiment of a membrane pump according to the invention in a side sectional view;
Detailed Description
Fig. 1 shows by way of example an embodiment of a membrane pump 1 according to the invention, said membrane pump 1 having a delivery chamber 3 and a working chamber 5 which are separated from each other by a membrane 7. The working chamber 5 is filled with hydraulic fluid and is operatively connected to a pressure generating device (not shown) for subjecting the hydraulic fluid to an oscillating pressure.
The oscillating pressure in the working chamber 5 of the membrane pump 1 allows the membrane 7 to move from a pressure stroke position to a suction stroke position and back again, wherein the volume of the delivery chamber 3 when the membrane 7 is in the pressure stroke position is smaller than the volume of the delivery chamber 3 when the membrane 7 is in the suction stroke position.
Here, the diaphragm 7 is operatively connected to the diaphragm return means 9, the diaphragm return means 9 comprising a pull rod 11, the pull rod 11 subjecting the diaphragm 7 to a force in a direction towards the suction stroke position. To this end, according to the embodiment of the invention shown, the diaphragm return means comprise a spring 13.
Furthermore, the membrane pump according to the invention comprises a storage chamber 15 for containing said hydraulic fluid, wherein said working chamber 5 and said storage chamber 15 are interconnected to each other by a channel 19, said channel 19 being closed by said closing element 17. Thus, if the closing element 17 is moved into the open position, the storage chamber 15 is directly connected to the working chamber 5 via the passage 19.
The closing element 17 is connected to the pull rod 11 in a manner such that it can be moved relative to the pull rod 11, so that the closing element 17 can be moved from a closed position into an open position and back. The movable connection of the closing element 17 to the tension rod 11 has a further advantage here. The draw rod 11 itself must be movably arranged in the working chamber 5 of the membrane pump 1, since the draw rod must perform the movement of the membrane 7 from the suction stroke position to the pressure stroke position and vice versa. In order to keep the closing element 17 in the closed position when the pull rod 11 is moved within a predetermined length range, it is also necessary that the closing element 17 is movably connected to the pull rod 11.
Here, fig. 1 shows that the closure element 17 comprises a magnet 21, which magnet 21 locks the closure element 17 in the closed position, and that the closure element 17 moves into the open position and the passage 19 is open if the diaphragm 7 is displaced from the suction stroke position beyond the pressure stroke position. Here, the magnet 21 is directly included in the closure element 17, and the magnet 21 forms a closed end of the closure element 17.
The magnetic field strength of the magnet 21 is preferably selected here in such a way that it is possible to store the compartment when this is in usePressure p of 15 2 And the pressure p of the working chamber 5 1 To p is reached by the pressure difference between 2 -p 1 >a, where a is a predetermined pressure value, the closure member 17 is moved from the closed position to the open position.
Also visible in fig. 1 is a housing 23 which encloses the working chamber 5, which housing 23 has a wall element 25 which comprises the channel 19, wherein the wall element 25 is movable within the housing 23 relative to the housing 23 in the direction of movement of the diaphragm return means 9, and wherein the wall element 25 is preloaded by a spring element (not shown) in the direction of the diaphragm return means 9.
Thus, if the wall element 25 is moved away from the closing element 17, the channel 19 can also be opened, so that an additional overpressure valve can be dispensed with.
Further figures show further embodiments of the membrane pump 1 according to the invention.
In fig. 2, the membrane pump 1 according to the invention comprises a magnet 21', which magnet 21' is formed by the wall element 25 or is comprised in the wall element 25, it being clear that the magnet 21' is also operatively connected or operatively connectable with the closure element 17.
Fig. 3 and 4 show two further embodiments of the invention. In both embodiments, a magnet 21 "is arranged at the end of the closure element 17 facing away from the channel 19.
As shown in fig. 3, the tie rod 11 comprises a magnet 21", the magnet 21" being arranged at the end of the closure element 17 facing away from the passage 19, and the closure element 17 comprising a further magnet 21", wherein the polarity of the poles of the mutually facing areas of the two magnets 21" is the same, so that mutual repulsion is achieved. Thus, in contrast to the embodiment according to the invention in fig. 1 and 2, no magnetic attraction is provided, but a magnetic force presses the closure element 17 against the channel 19.
Fig. 4 shows a modification of the embodiment according to fig. 3, where the diaphragm 7 is shown releasably fixed by means of a diaphragm holding element 27, said diaphragm holding element 27 being partly introduced into the pull rod. The magnet arranged in the tie rod 11 is thus directly connected to the membrane holder element 27, as a result of which the repelling force of the magnet 21 "acts the same as in the exemplary embodiment according to fig. 3, but provides a more convenient access for the replacement of the magnet. In this case, the replacement of the magnet 21 "can be achieved, preferably by partially disassembling the tie rod 11.
The features of the invention disclosed in the above description as well as in the claims and drawings may be of importance both individually and in any combination required for the realization of the invention in various embodiments.
Claims (14)
1. A diaphragm pump having a delivery chamber and a working chamber,
wherein the delivery chamber comprises a pressure tube interface and a suction tube interface, the working chamber is filled or fillable with hydraulic fluid and the working chamber is operatively connected to a pressure generating device to subject the hydraulic fluid to an oscillating pressure;
the diaphragm pump further comprises a diaphragm having at least one diaphragm layer and a diaphragm core, the diaphragm separating the delivery chamber and the working chamber from each other, the diaphragm being movable from a pressure stroke position to a suction stroke position and back again;
wherein the volume of the delivery chamber at the pressure stroke position of the diaphragm is less than the volume of the delivery chamber at the suction stroke position of the diaphragm;
wherein the diaphragm is operatively connected or connectable with a diaphragm return means, the diaphragm return means comprising a pull rod forcing the diaphragm in the direction of a suction stroke position or being able to force the diaphragm in the direction of a suction stroke position;
the diaphragm pump further comprises a storage chamber for containing the hydraulic fluid, wherein the working chamber and the storage chamber are connected to each other by means of a channel closable by a closing element, wherein the closing element is connected to the pull rod in a movable manner relative to the pull rod such that the closing element can be moved from a closed position to an open position and back;
it is characterized in that the preparation method is characterized in that,
the closure member including and/or being operatively connected to a magnet which locks the closure member in the closed position, wherein when the diaphragm is moved from the suction stroke position to the deflected over-pressure stroke position, the closure member moves to the open position and the passage opens,
the closure element comprises a second magnet on the end of the closure element facing the passage, wherein the second magnet is operatively connected to a housing surrounding the working chamber at a location around the passage when in the closed position.
2. The diaphragm pump according to claim 1, wherein the working chamber is provided in a housing, wherein the housing comprises or forms a first magnet in the region of the channel, wherein the first magnet is operatively connected with the closure element at least when the closure element is in the closed position.
3. The diaphragm pump of claim 2 wherein the housing includes or forms a first magnet around the passage.
4. A membrane pump according to claim 1, characterized in that the closure element comprises a third magnet on and/or in the region of the end of the closure element facing the channel, the housing surrounding the working chamber comprises or forms a fourth magnet in the region of the channel, the polarity of the poles of the mutually facing regions of the third and fourth magnets being different, and the third and fourth magnets are operatively connected to each other at least when in the closed position.
5. The diaphragm pump of claim 4, wherein the housing enclosing the working chamber comprises or forms a fourth magnet around the channel.
6. The diaphragm pump according to claim 1, characterized in that the pull rod comprises a fifth magnet arranged on and/or in the region of an end of the closure element facing away from the channel and/or the closure element comprises a sixth magnet arranged on an end of the closure element facing away from the channel, wherein the poles of the regions of the fifth and sixth magnets facing each other are of the same polarity and the fifth and sixth magnets are operatively connected to each other at least when the closure element is in the closed position.
7. The diaphragm pump according to claim 6, characterized in that the diaphragm is releasably fixed by means of a diaphragm holding element introduced at least partially into the pull rod, wherein the fifth magnet is comprised in the diaphragm holding element.
8. The diaphragm pump according to claim 7, wherein the fifth magnet is located on or in an end region of the diaphragm holding element facing away from the diaphragm and inserted into the pull rod.
9. The diaphragm pump of claim 1, comprising a seventh magnet operatively connected with the closure member and a housing surrounding the working chamber, wherein the seventh magnet is not fixedly connected with the closure member, the pull rod, and the housing; wherein the magnetic field strength and the resulting magnet attraction force at the closure element are always greater than the magnetic field strength and the resulting magnet attraction force at the housing.
10. The diaphragm pump of claim 1 wherein the magnet is a spherical magnet, a bar magnet, a conical magnet, a disc magnet, or a ring magnet.
11. The diaphragm pump according to claim 1, characterized in that the magnetic field strength of the magnet is selected in such a way that,
when the pressure p of the storage chamber 2 And the pressure p of said working chamber 1 To p is reached by the pressure difference between 2 －p 1 At > a, where a is a predetermined pressure value, the closure member moves from the closed position to the open position.
12. The diaphragm pump of claim 1, wherein a housing enclosing the working chamber has a wall element comprising the passage, wherein the wall element is movable within the housing relative to the housing in a direction of movement of the diaphragm return means, and wherein the wall element is preloaded by a spring element in the direction of the diaphragm return means.
13. A membrane pump according to claim 12, characterized in that the elastic preload of the wall element is chosen in such a way that when the pressure p of the working chamber is 1 And the pressure p of the storage chamber 2 To p is reached by the pressure difference between 1 －p 2 B, where b is a predetermined pressure value, the wall element is moved away from the closure element, with the result that the passage is opened.
14. A membrane pump according to claim 1, characterized in that the membrane return means comprise a further spring element which is connected or operatively connected with the pull rod such that the membrane is preloaded with a force in the direction of the suction stroke position by means of the further spring element.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018111601.2 | 2018-05-15 | ||
| DE102018111601.2A DE102018111601B4 (en) | 2018-05-15 | 2018-05-15 | Membrane system control with magnetically held locking element |
| PCT/DE2019/100407 WO2019219122A1 (en) | 2018-05-15 | 2019-05-06 | Diaphragm system control having a magnetically retained closure element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112189094A CN112189094A (en) | 2021-01-05 |
| CN112189094B true CN112189094B (en) | 2022-11-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980031363.2A Active CN112189094B (en) | 2018-05-15 | 2019-05-06 | Diaphragm system controller with magnetically held closure element |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20210215151A1 (en) |
| CN (1) | CN112189094B (en) |
| DE (1) | DE102018111601B4 (en) |
| WO (1) | WO2019219122A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022115955A1 (en) | 2022-06-27 | 2023-12-28 | Prominent Gmbh | Dosing pump with stroke adjustment |
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| CN201635971U (en) * | 2009-12-26 | 2010-11-17 | 浙江工业大学 | Reciprocating type hydraulic membrane pump |
| JP2011236949A (en) * | 2010-05-07 | 2011-11-24 | Ishizaki Seisakusho:Kk | Valve device having valve closure mechanism using magnetic material |
| CN105209758A (en) * | 2013-05-16 | 2015-12-30 | 卓越有限公司 | Diaphragm pump having position control |
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|---|---|---|---|---|
| US3421448A (en) * | 1967-01-11 | 1969-01-14 | Gen Motors Corp | Fluid pressure actuated reciprocable pump |
| DE3708868A1 (en) * | 1987-03-18 | 1988-10-06 | Ott Kg Lewa | METHOD AND DEVICE FOR STARTING A HYDRAULIC DIAPHRAGM PUMP AGAINST LOAD |
| US20030037822A1 (en) * | 2001-08-22 | 2003-02-27 | Fischer John G. | Check valve for fuel pump |
| US20060102234A1 (en) * | 2004-11-17 | 2006-05-18 | David Meisel | Device for creating a pulsating flow of gas or fluid |
| US7665974B2 (en) * | 2007-05-02 | 2010-02-23 | Wanner Engineering, Inc. | Diaphragm pump position control with offset valve axis |
| DE102014010108B4 (en) * | 2014-07-08 | 2016-01-28 | Lewa Gmbh | Hydraulically driven diaphragm pump |
-
2018
- 2018-05-15 DE DE102018111601.2A patent/DE102018111601B4/en active Active
-
2019
- 2019-05-06 CN CN201980031363.2A patent/CN112189094B/en active Active
- 2019-05-06 US US17/054,835 patent/US20210215151A1/en not_active Abandoned
- 2019-05-06 WO PCT/DE2019/100407 patent/WO2019219122A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3485441A (en) * | 1966-09-28 | 1969-12-23 | Texas Gas Transmission Corp | Magnetically biased compressor check valves |
| US6263913B1 (en) * | 1998-09-28 | 2001-07-24 | Tiefenbach Bergbautechnik Gmbh | Hydraulic multiway valve |
| JP2009299866A (en) * | 2008-06-17 | 2009-12-24 | Mirai Ind Co Ltd | Vent valve |
| CN201635971U (en) * | 2009-12-26 | 2010-11-17 | 浙江工业大学 | Reciprocating type hydraulic membrane pump |
| JP2011236949A (en) * | 2010-05-07 | 2011-11-24 | Ishizaki Seisakusho:Kk | Valve device having valve closure mechanism using magnetic material |
| CN105209758A (en) * | 2013-05-16 | 2015-12-30 | 卓越有限公司 | Diaphragm pump having position control |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019219122A1 (en) | 2019-11-21 |
| US20210215151A1 (en) | 2021-07-15 |
| DE102018111601A1 (en) | 2019-11-21 |
| DE102018111601B4 (en) | 2020-09-24 |
| CN112189094A (en) | 2021-01-05 |
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