Pulsation damping system

Abstract

A pulsation damping system (100) for reducing pressure pulsations in a line (6, 13) on the inflow side and / or outflow side of a piston pump (101, 102), having at least one piston pump (101, 102) with a pump chamber (2, 4), wherein the pump chamber (2, 4) is connected to a pump inflow channel (6) via a first fluid connection (6a) and to a pump outflow channel (13) via a second fluid connection (13a) for the purpose of conveying a conveying medium (9). The pump chamber (2, 4) additionally has at least one damping fluid connection (20a, 29a) according to the invention, by means of which the pump chamber (2, 4) is respectively fluidically connected to a damping device (103, 104) for damping pressure pulsations.

Description

Technical Field

[0001] This invention relates to a pulsation damping system for reducing pressure vibrations in the inlet and / or outlet piping of a piston pump, particularly in the suction and / or high-pressure areas, the piston pump being used, in particular, to transport fluids with a solids content, such as slurry pumps. The pulsation damping system has at least one piston pump having a pump chamber, wherein the pump chamber for transporting the transport medium or fluid is fluidly connected to the pump inlet passage, also known as the suction passage, via a first fluid interface, and to the pump outlet passage via a second fluid interface. Furthermore, the present invention relates to a pulsation damping system for reducing pressure vibrations in the inlet and / or outlet piping, particularly in the suction and / or high-pressure areas of a piston pump. The pulsation damping system has at least one pump inlet channel and one pump outlet channel that are fluidly connected to the pump chamber of the piston pump for conveying a transport medium or fluid. A first storage container is provided in the pump inlet channel and / or pump outlet channel, in which the fluid to be transported can be temporarily stored in a first region, also referred to as a pressure chamber. A gas volume, particularly a compressible gas volume, is provided in a second region, also referred to as a pressure chamber. Background Technology

[0002] Such pulsation damping systems are known in many variations and are commonly used in piping systems where pressure oscillations or shocks can occur—for example, through the operation of pumps, regulating elements, or due to other flow effects. For instance, when a piston pump is running, by its very nature, the oscillating motion of the pump piston causes non-uniform volumetric flow in the pump's suction section and at the outlet. These non-uniform volumetric flows result in pressure pulsations that negatively impact the pump's function and can cause undesirable vibrations in adjacent piping systems. In the pump's suction section, these pulsations can cause cavitation, which can lead to both reduced pump efficiency and pump damage.

[0003] Most known pulsation dampers are installed in the piping on the inlet and / or outlet sides of the pump, and most include a compensation chamber or reservoir filled with a compressible gas volume, which is effectively connected to the pulsating fluid to be transported. These dampers function by compensating for pressure increases by compressing the gas volume located in the reservoir. Because the gas, due to its high compressibility compared to the fluid, experiences only a small pressure change, it can reduce pressure pulsations caused by the exhibited volumetric flow pulsations.

[0004] It should be clarified that the inlet-side piping is understood as the pump inlet channel or suction pipe, and the outlet-side piping is understood as the pump outlet channel or high-pressure pipe. The pump inlet channel is typically connected to a fluid source to draw and deliver fluid, and the pump outlet channel is used for further transporting the fluid to be delivered. Typically, check valves are installed between the aforementioned reservoir chamber and pump chamber, respectively, in the pump inlet and pump outlet channels to transport fluid by means of a piston pump. The pump can be configured in particular as a conventional piston pump with, for example, a single pump chamber, or as a piston diaphragm pump with a pump chamber including a pump working chamber and a pump delivery chamber. Furthermore, multiple pistons or piston pumps are typically used, which draw the fluid to be delivered from a common suction pipe having a central reservoir and deliver the fluid on the high-pressure side to a common high-pressure pipe.

[0005] An embodiment of a damping system is known, for example, from EP 0 679 832 A1, in which a volume-changing region is provided to reduce pressure pulsation in the pipeline, having a movable wall that can change the volume of the pipeline.

[0006] Furthermore, the use of known pulsating dampers in fluids with a solid component is only feasible to a limited extent because most throttling resistances, compensation chambers, or other pressure damping components associated with the main delivery pipeline are either prone to clogging due to the resulting narrow sections or must be selected so extensively to avoid clogging that the damping effect is significantly reduced. In addition, the solid component contained in the fluid is typically very abrasive, causing the throttling sections to wear down rapidly during solid flow, which negatively impacts the damper's function. Summary of the Invention

[0007] Therefore, the object of the present invention is to provide a system for reducing pressure vibration in the piping on the inlet and / or outlet side of a piston pump, the system improving upon at least one of the aforementioned disadvantages, and particularly achieving effective and durable use in the field of pumps for conveying fluids with particularly large pressure fluctuation ranges and also having a solids content.

[0008] The present invention achieves its proposed objective through a pulsation damping system. Advantageous embodiments and improvements of the invention are disclosed in the specification and drawings.

[0009] The pump chamber of the pulsation damping system according to the invention has at least one additional fluid interface, also called a damping fluid interface, by means of which the pump chamber, and especially the fluid therein, is fluidly connected to a damping device for damping pressure pulsations. Damping can be achieved, in particular, by introducing or removing the fluid in the pump chamber toward or away from the damping device in a time- and / or quantity-regulated manner. Additionally, by means of the damping device, for example by volume change, pressure shocks occurring in the pump chamber and / or adjacent inlet and / or outlet pipes can be “intercepted.” Therefore, especially at high pump frequencies, the acceleration effect caused by the oscillating motion of the piston and applied to the fluid medium can be reduced, thereby reducing pressure shocks in a particularly simple manner. This acceleration effect can result in relatively high accelerating forces in the pump chamber and adjacent inlet and / or outlet pipes, leading to pressure pulsations. The fluid flowing between the pump chamber and the damping device can advantageously be configured as an incompressible blocking fluid, such as hydraulic oil, especially the pump working medium, or alternatively, the fluid medium to be transported. Due to this design, and especially by the preferred use of a damping fluid that acts independently of the fluid being transported at the pump chamber, current pulsating damping systems are particularly well-suited for use in piping systems for transporting fluids with a solid content.

[0010] Preferably, at least one throttle valve is disposed in a conduit positioned between the pump chamber and the damping device. The throttle valve is particularly suitable for placement between the pump chamber and a pressure chamber fluidly connected to the pump chamber, such as a volume-changing device or a storage container. This allows at least a portion of the pulsating energy to be converted into heat, thereby effectively and advantageously reducing the level of pressure pulsation. Specifically, pressure pulses of fluid, for example, at least partially located in the pump chamber and flowing through the damping fluid interface toward or away from the damping device due to very high or very low pressures, can be converted into heat when passing through the throttle valve, thus particularly reducing pressure pulsation. Therefore, the throttle valve can also be considered part of the damping device. Alternatively, the throttle valve can also, in principle, be disposed in an adjacent or downstream conduit system, which, although not directly fluidly connected to the pump chamber, is effectively connected to the pump with respect to the pressure present in the pump chamber, for example by means of a device for transferring pressure from the fluid located in the pump chamber to a separate second fluid.

[0011] Preferably, the damping device has a volume changing device, also called a volume compensation device, for changing the volume of at least one pressure chamber fluidly connected to the pump chamber. Thus, fluid, particularly located in the pump chamber and subjected to increased pressure, can be controllably guided or transported towards or away from the damping device through the damping fluid interface. This control of the fluid flow can be achieved, for example, by increasing the pressure chamber downstream of the damping fluid interface to allow fluid inflow from the pump chamber into the pressure chamber, or by decreasing the pressure chamber to allow fluid to flow back from the pressure chamber or out into the pump chamber. When the flow through the throttle, preferably located in the conduit between the pump chamber and the pressure chamber, is performed here, the resulting pressure pulses can be converted into heat, thereby reducing pressure pulsations particularly effectively and controllably. It should be understood that the term "controllably" is particularly understood to mean that the flow through the throttle and the resulting pressure reduction can be performed in a time- and quantity-defined manner, preferably in a predictable manner, and especially preferably automatically.

[0012] Preferably, the volume changing device has a transfer body for changing the volume of at least one pressure chamber, said transfer body being particularly configured as a movable wall, a movable piston, or a movable membrane. For open-loop or closed-loop control of the volume change of the pressure chamber, a counter-pressure can be applied to the transfer body relative to the fluid pressure applied to the pressure chamber side, for example via a spring-elastic element. Particularly preferably, the transfer body is configured as a piston, particularly a split piston, or as a membrane in a self-closed system such as a piston-cylinder-unit. In this design, the counter-pressure acting on the piston or membrane can be achieved, for example, through a correspondingly provided and pressure-loaded second pressure chamber. This allows for particularly advantageous, and especially active, control of the transfer body's movement.

[0013] Preferably, the volume changing device has a first pressure chamber and a second pressure chamber, the first pressure chamber being fluidly connected to the pump chamber, and the second pressure chamber being fluidly separated from and effectively connected to the first pressure chamber by means of a transfer body. For this purpose, the second pressure chamber is advantageously filled with a gas volume. By transferring or moving the transfer body, the respective volumes of the first and second pressure chambers relative to each other can be changed in a relatively simple manner; in particular, the volume of the second pressure chamber can decrease when the volume of the first pressure chamber increases, and vice versa. This allows for particularly advantageous control of the flow of fluid in the pump chamber toward or away from the damping device through the damping fluid interface, and induces particularly effective damping, especially in the region of the throttling section.

[0014] Preferably, to regulate the gas pressure present in the second pressure chamber, the second pressure chamber can be directly and / or indirectly fluidly connected to a separate gas source via a regulating valve. This allows for particularly independent and simple control of the back pressure applied to the transfer body. For example, the gas pressure present in the second pressure chamber can be regulated by means of the aforementioned separate or external pressure or gas source and a regulating valve for regulation, wherein the control of the regulating valve can be performed via at least one pressure sensor disposed in the pump inlet and / or pump outlet channels and a PID (proportional-integral-derivative-regulatory) control suitable therefor. When multiple volume changing devices are provided, for example, the regulating valve of the volume changing device disposed on the pump inlet side can be controlled according to the pressure present in the pump inlet channel, and / or the regulating valve of the volume changing device disposed on the pump outlet side can be controlled according to the pressure present in the pump outlet channel. Alternatively, the corresponding regulating valve can also be controlled according to the pressure present in the pump chamber, wherein for this purpose, a pressure sensor is advantageously disposed in the area of ​​the pump chamber.

[0015] Preferably, to regulate the gas pressure present in the second pressure chamber, the second pressure chamber is directly or indirectly connected to the pressure present in the pump inlet and / or pump outlet channels. For example, the second pressure chamber can be fluidly connected to a reservoir such as a pressure chamber, which is fluidly connected to the pump inlet or pump outlet channels. Thus, the pressure present in the pump inlet and / or pump outlet channels can be used as a pressure source or pressure measurement for the fluid in the second pressure chamber, wherein the fluid in the second pressure chamber is preferably fluidly separated from the transport fluid located in the pump inlet or pump outlet channels, for example, by means of a membrane.

[0016] Preferably, the damping device has a reservoir with a fluid inlet and a fluid outlet, the reservoir being disposed in the pump inlet and / or pump outlet channels, particularly on the fluid side of the check valve opposite to the piston pump, the check valve being disposed in the corresponding channel, wherein the fluid is disposed in the lower region of the reservoir and a pressurized gas volume, i.e., under pressure, is disposed in the upper region. For this purpose, the reservoir is particularly preferably configured as a volumetric and / or pressure storage container, especially for forming or extracting a volume in the reservoir, in which the fluid to be transported can be advantageously temporarily stored for transport. This enables reliable and efficient pressure transmission from the fluid to be transported to the gas volume, particularly in the case of fluids containing solid particles, especially for pressure compensation purposes. Preferably, the reservoir is configured as a pressure vessel. The gas volume can, for example, be effectively connected directly or indirectly to the fluid located in a second pressure chamber. Thus, in particular—depending on the direction of movement of the piston in the piston pump—the transfer body is automatically controlled through pressure transmission from the pump inlet and / or pump outlet channels to the second pressure chamber. To set or regulate the gas pressure present in the storage container, the storage container can be directly and / or indirectly connected, at least temporarily, to a separate gas source fluid via a regulating valve.

[0017] Preferably, the gas volume of the storage container is fluidly connected to the second pressure chamber of the volume changing device via a pressure pipe. Thus, the pressure present in the gas volume of the storage container can act directly on the transfer body. This design is particularly advantageous for conveying fluids containing solid particles, and especially enables safe and automatic transfer of the transfer body, ultimately reducing pulsating pressure. For example, the pressure applied to the pump inlet or outlet side of the medium to be conveyed, especially a fluid mixed with solids, can be transmitted in a particularly simple and reliable manner to the fluid connected to the second pressure chamber, especially a gaseous fluid. This achieves automatic and direct control of the transfer body by means of the pressure in the second pressure chamber—depending on the direction of movement of the piston in the piston pump—thereby achieving the inflow of fluid from the pump chamber toward or out of the damping device, simultaneously passing through the throttling section and, in this case, converting pressure pulses into heat, thereby ultimately achieving automatic damping of pressure pulsations.

[0018] Preferably, the piston pump is configured as a diaphragm piston pump, having a pump chamber and a pump delivery chamber fluidly separated from and effectively connected to the pump chamber, wherein first and second delivery fluid interfaces are provided on the pump delivery chamber and at least one damping fluid interface is provided on the pump chamber. In this case, a pressure medium can be provided in the pump chamber, which is fluidly connected to the first pressure chamber of the volume changing device via the damping fluid interface. The pump chamber, particularly with respect to the diaphragm of the pump, is located on the piston side, and the pump delivery chamber is located on the side of the diaphragm opposite to the piston. This fluid separation of the delivery fluid from the pressure medium, especially when the delivery fluid contains solid particles, achieves a particularly effective and reliable reduction of pressure pulsation. In an alternative design, particularly in conventional piston pumps, the pump chamber and the pump delivery chamber form a common pump chamber.

[0019] Furthermore, the pulsation damping system is used to dampen pressure vibrations in the piping sections that fluidly connect the first storage container and the pump chamber in the pump inlet and / or outlet channels. In the pulsation damping system according to the invention, a second storage container, preferably separately constructed, is additionally provided, also referred to as a compensation container, pressure chamber, or volume change device. Due to this design, the current pulsation damping system is particularly suitable for application in the piping systems of piston pumps, where particularly large amplitude and / or high-frequency pressure fluctuations and pressure pulses occur. In particular, at high pump frequencies, the acceleration effect caused by the oscillating motion of the piston and applied to the fluid medium is reduced, thereby reducing recurring pressure shocks in a particularly simple and effective manner. This acceleration effect results in relatively high acceleration forces and pressures in the pump chamber and adjacent inlet and / or outlet piping. Damping can be achieved, in particular, by adjusting the timing and / or quantity of the fluid being introduced toward or away from the corresponding second storage container, wherein the fluid is located in the pump inlet channel, particularly in a section of piping advantageously located directly upstream of the pump chamber inlet interface, and / or in the pump outlet channel, particularly in a section of piping advantageously located directly downstream of the pump chamber outlet interface. This control of the fluid flow can be achieved, for example, by allowing fluid to flow from the pump inlet or outlet channel into the second storage container or from the second storage container into the pump inlet or outlet channel. Pressure surges occurring in the piping on the inlet and / or outlet sides can, in this case, be "intercepted" in the second storage container, for example, due to volume changes.

[0020] It should be clarified that the pump inlet channel is understood as the pipeline or suction pipe on the pump inlet side, and the pump outlet channel is understood as the pipeline or high-pressure pipe on the pump outlet side. The pump inlet channel is typically connected to a fluid source for pumping and delivering the fluid, and the pump outlet channel is used for further transporting the fluid to be delivered. The pump can be configured in particular as a typical piston pump with, for example, a single pump chamber, or as a piston diaphragm pump with a pump chamber including a pump working chamber and a pump delivery chamber. Furthermore, multiple pistons or piston pumps are typically used, which draw the fluid to be delivered from a common suction pipe having a central storage container and deliver the fluid on the high-pressure side to a common high-pressure pipe.

[0021] Preferably, the second storage container is filled with the transport fluid to be transported in the first region and with a compressible gas volume in the second region. Particularly preferably, the transport fluid is disposed in the lower region of the second storage container, and a pressurized gas volume, i.e., under pressure, is disposed in the upper region. For this purpose, the second storage container is particularly preferably configured as a volumetric and / or pressure storage container, especially for forming or extracting volumes within the second storage container in which the transport fluid can be advantageously temporarily stored for transport. This ensures reliable and efficient pressure transfer from the transport fluid to the gas volume, particularly in the case of a transport fluid containing solid particles, especially for pressure compensation purposes, and for the safe and particularly residue-free introduction and extraction of the transport fluid into and from the storage container. This particularly prevents the deposition of solid particles. Preferably, the second storage container is configured as a pressure vessel. The gas volume located in the upper second region can, for example, be effectively connected directly or indirectly to the fluid located in the lower region. To set or regulate the gas pressure present in the storage container, the storage container can be directly and / or indirectly connected, at least temporarily, to a separate gas source fluid via a regulating valve. In this case, no additional components, such as baffles, can be placed between the volumes of fluid and gas to be transported; instead, only the liquid level is formed. By shifting or moving the liquid level within the storage container, the corresponding volumes of the first and second regions can be changed relative to each other; specifically, the second region can decrease when the first region increases, and vice versa. Particularly effective damping can be caused by the inflow and outflow of fluid from the second storage container through the pump inlet or pump outlet channels. This flow is preferably adjustable, for example, by allowing fluid to flow into or out of the second storage container from the pump inlet or pump outlet channels.

[0022] Preferably, the second storage container, particularly its first region, is connected to a section of the pump inlet or outlet channel via a branch line, and a throttling valve is provided in the branch line. Specifically, the second storage container or its first region on the inlet side can be connected to a section of the pump inlet channel via a first branch line, and the second storage container or its first region on the outlet side can be connected to a section of the pump outlet channel via a second branch line, wherein throttling valves are provided in each of the branch lines. In this case, when flow is passed through the throttling valves, preferably located in the pipeline between the pump chamber and the corresponding first regions of the second storage container, at least a portion of the pulsating energy can be converted into heat, thereby enabling a particularly effective and controllable reduction in the level of pressure pulsation. It should be understood that the term "controllable" is particularly understood to mean that the flow through the throttling valve and the resulting pressure reduction can be performed in a time- and quantity-limited manner, preferably in a predictable manner, and especially preferably automatically.

[0023] Preferably, the first storage container disposed in the pump inlet channel is directly or indirectly fluidly connected to the fluid source via a fluid inlet and directly or indirectly fluidly connected to the second storage container via a fluid outlet, and / or the first storage container disposed in the pump outlet channel is directly or indirectly fluidly connected to the second storage container via a fluid inlet and directly or indirectly fluidly connected to the outlet pipeline via a fluid outlet. Thus, the second storage container can be disposed downstream of the first storage container in the pump inlet channel and upstream of the first storage container in the pump outlet channel.

[0024] Preferably, to regulate gas pressure, the gas volume of the second storage container and / or the gas volume of the first storage container can be directly and / or indirectly fluidly connected to a separate gas source via a regulating valve. This allows for particularly independent and simple control of the back pressure applied to the second regions of the respective storage containers. The regulation can be performed, for example, by means of a regulating valve, wherein control of the regulating valve can be performed, for example, via at least one pressure sensor disposed in the pump inlet and / or pump outlet channels and a PID (proportional-integral-derivative-regulatory) control suitable therefor. When multiple storage containers are provided, for example, the regulating valve of the storage container disposed on the pump inlet side can be controlled according to the pressure present in the pump inlet channel, and / or the regulating valve of the storage container disposed on the pump outlet side can be controlled according to the pressure present in the pump outlet channel. Alternatively, the corresponding regulating valve can also be controlled according to the pressure present in the pump chamber, wherein for this purpose, a pressure sensor is advantageously disposed in a region of the pump chamber.

[0025] Preferably, the gas volume of the second storage container is fluidly connected to the gas volume of the first storage container via a separate auxiliary line, such as a gas pressure line. This effectively connects the two second regions of the storage containers, allowing the gas pressure present in the second region of the corresponding other storage container to be used as a pressure source or pressure measurement for the fluid in the second region of said one storage container. Furthermore, this automatically dampens pressure pulsations.

[0026] Preferably, the check valve and a branch of the second storage container or the branch line leading to the second storage container are disposed in a pipeline section located between the pump chamber and the first storage container. This allows the pump to operate particularly efficiently.

[0027] Particularly preferably, the second storage container on the pump inlet side is fluidly connected to the pump inlet channel along the flow direction, downstream of the first storage container on the pump inlet side and upstream of the pump chamber, particularly upstream of the check valve, and / or the second storage container on the pump outlet side is fluidly connected to the pump outlet channel downstream of the pump chamber, particularly downstream of the check valve and upstream of the first storage container on the pump outlet side. Specifically, the second storage container is positioned on the fluid side of the check valve opposite to the piston pump, the check valve being disposed in the corresponding pump channel. This achieves particularly effective pressure pulsation damping.

[0028] In principle, fluid separation between the first and second storage containers can be achieved by utilizing the different densities of the fluid in the first region and the gas in the second region. That is, in this design, no separation mechanism is provided between the first and second regions. The liquid level in the respective storage container can be adjusted in this case by regulating the gas pressure. Such a design particularly enables storage containers that can be manufactured in a lightweight, maintenance-free, and low-cost manner. However, in certain embodiments, it is advantageous to provide a transfer body between the fluid and gas volumes for fluid separation between the first and second regions in the first and / or second storage containers. This transfer body is particularly configured as a movable wall, a movable piston, or a transferable membrane. Thus, the pressure present in the gas volume of the respective storage container can act directly on the transfer body, particularly as a reaction force relative to the force applied by the fluid. Particularly preferably, the transfer body is configured as a flexible membrane. Therefore, the transfer of the transfer body can be performed in a particularly simple manner. Therefore, the storage container can particularly have a first pressure chamber and a second pressure chamber filled with fluid, the second pressure chamber being fluidly separated from the first pressure chamber by means of a transfer body, effectively connected to the first pressure chamber, and preferably filled with gas. This design is particularly advantageous for conveying fluids containing solid particles, and achieves safe and low-maintenance pulsation damping, especially in such fluid conditions. Thus, the pressure applied to the pump inlet or outlet side of the medium to be conveyed, especially for gaseous fluids, can be transferred to the second region of the storage container in a particularly simple and reliable manner. In this case, the transfer body can preferably be moved toward the first or second region. By transferring or moving the transfer body separating the regions, the corresponding volumes of the first and second regions can be changed relative to each other in a relatively simple manner; in particular, when the volume of the first region or pressure chamber increases, the volume of the second region or second pressure chamber can decrease, and when the first region decreases, the second region can increase. This allows for particularly advantageous control of the flow of fluid in the pump inlet or outlet channel into or out of the second storage container, and can induce particularly effective damping. To control volume changes in an open-loop or closed-loop manner, a counter-pressure can be applied to the transfer body relative to the pressure applied to the fluid delivery side, for example via a spring-elastic element. Preferably, the transfer body is configured as a self-closed system, such as a piston in a piston-cylinder-unit, particularly a split piston. In such a design, the counter-pressure acting on the piston or diaphragm can be achieved, for example, through a medium located in a correspondingly positioned and pressurized second pressure chamber.

[0029] Preferably, the piston pump is configured as a piston diaphragm pump having a pump chamber and a pump delivery chamber, the pump delivery chamber being fluidly separated from and effectively connected to the pump chamber. The pump chamber, particularly with respect to the diaphragm, is located on the piston side, and the pump delivery chamber is located on the side of the diaphragm facing away from the piston. This fluid separation of the transported fluid from the pressure medium, especially when the transported fluid contains solid particles, achieves particularly effective and reliable reduction of pressure pulsation. In an alternative design, particularly in conventional piston pumps, the pump chamber and the pump delivery chamber form a common pump chamber. Attached Figure Description

[0030] Embodiments of the invention are described in detail below with reference to the accompanying drawings. The drawings schematically illustrate:

[0031] Figure 1 A piston diaphragm pump known from the prior art is shown;

[0032] Figure 2a A first design of a pulsation damping system according to the invention on a piston diaphragm pump is shown;

[0033] Figure 2b Show Figure 2a An extended variant of the pulsating damping system in [the text].

[0034] Figure 3 A third design of the pulsation damping system according to the invention is shown on a conventional piston pump;

[0035] Figure 4a A fourth design of the pulsation damping system according to the invention is shown on a conventional piston pump;

[0036] Figure 4b Show Figure 4a An extended variant of the pulsating damping system in [the text].

[0037] Figure 5 A piston diaphragm pump known from the prior art is shown;

[0038] Figure 6 A first design of the pulsation damping system according to the invention on a piston diaphragm pump is shown; and

[0039] Figure 7 A second design of the pulsation damping system according to the invention on a piston diaphragm pump is shown. Detailed Implementation

[0040] exist Figure 1 The diagram shows the principle construction of a piston diaphragm pump 101 known from the prior art, with pipelines 6, 13 connected thereto and intermediate storage containers 8, 15, or also called reserve containers, which are advantageous for conveying conveying needs.

[0041] The oscillating motion of piston 1 is transmitted here to pressure medium 2a located in the first pressure chamber 2, which constitutes the pump working chamber. Regarding pressure transmission, pressure medium 2a is effectively connected via a flexible membrane 3 to a second pressure chamber 4, which is currently constituting the pump delivery chamber. These two pressure chambers 2 and 4 are surrounded by a pressure-resistant housing 5. The pump delivery chamber 4 contains, in particular, the medium 9 to be delivered, which can enter the pump delivery chamber 4 through a fluid inlet 6a and exit through a fluid outlet 13a. Specifically, the medium 9 to be delivered can be drawn into the pump delivery chamber 4 from a suction pipe 6 through the fluid inlet 6a, in which a suction valve 7, constituting a check valve, is located. In the prior art configuration presented here, a reservoir 8, or pressure vessel, is also present in the suction pipe 6 of pump 101, which is partially filled with the fluid 9 to be delivered, and a pressurized gas 10, such as compressed air, is present in its upper portion. The storage container 8 is connected here to a source 11, which has a geodetic height relative to the pump 101, so that the required suction pressure can be provided. Alternatively, the storage container can also be loaded via a feed pump, which is not shown here, and thus generates the necessary suction pressure in the suction line 6. The liquid level in the storage container 8 is here regulated by the pressure of the gas 10. By measuring the liquid level in the storage container 8, the gas pressure 10 can be changed, in particular via the regulating valve 12, so that the preset liquid level in the storage container 8 can be regulated as precisely as possible. To set or regulate the gas pressure present in the storage container 8, the storage container 8 is connected to the gas source via a pneumatic conduit located in the area of ​​the gas volume 10 and via the regulating valve 12.

[0042] Pump delivery chamber 4 of pump 101 is connected to another storage container 15 via an outlet pipe 13, in which a pressure valve 14 constituting a check valve is located. Similar to the suction side of pump 101, and particularly similar to the storage container 8 disposed thereon, the medium 9 to be pumped is located in the lower region of the storage container 15 on the outlet side, while a pressurized gas or air volume 17 exists above it. Here, the liquid level in the storage container 15 can also be adjusted via a regulating valve 18 and a gas source (not shown in detail) connected thereto, which is fluidly connected to the air volume 17. The volumetric flow generated by pump 101 can then be delivered to the intended application via a discharge pipe 19.

[0043] The operation of this pump can be described as follows: During the suction phase of the piston pump 101 shown, the piston 1 moves from... Figure 1The rightmost position shown in the diagram moves to the left, causing a pressure drop in pump chamber 2. This pressure is transmitted to the fluid 9 to be pumped via the flexible diaphragm 3, which is in position 3a at the start of the suction phase, and thus to the pump delivery chamber 4. If the pressure in both pressure chambers 2 and 4 of the pump drops below the pressure present in the storage container 8, the suction valve 7 automatically opens and the medium 9 to be pumped flows from the storage container 8 into the pump delivery chamber 4.

[0044] Once piston 1 reaches... Figure 1 As shown in the leftmost position, the piston then moves to the right again. This causes compression in the two fluid chambers 2 and 4. This pressure increase causes the suction valve 7 to close and no more medium 9 is drawn in. If the piston 1 now moves further to the right, the pressure in the two fluid chambers 2 and 4 continues to rise until it exceeds the pressure present in the storage container 15. This opens the pressure valve 14, and the pump 101 delivers medium 9 from the pump delivery chamber 4 to the storage container 15 until the piston 1 reaches the rightmost position again and the process repeats.

[0045] The oscillating motion of piston 1 applies an acceleration effect to the fluid medium 9 to be transported, which may cause pulsations in pressure chambers 2 and 4, adjacent suction pipe 6, and discharge pipe 13. To reduce these pulsations, a pulsation damper system 100 according to the invention is described below, which can first reduce the pulsations propagating during the suction of the medium 9.

[0046] It should be clarified that the pump design with only one piston described herein exists relatively rarely in practice, and in this case, only the operating principle of such a pump configuration should be explained. Pumps with multiple pistons are typically used, drawing from a common suction pipe with a central reservoir and then delivering to a common delivery power source. Therefore, the principle of position damping presented herein can be applied to pumps with any number of pistons.

[0047] exist Figure 2a The diagram illustrates a first design of a pulsation damping system 100 according to the present invention. This design, for example, is shown in… Figure 1 The piston diaphragm pump system shown in the diagram is additionally equipped with a damping device 103. In the present case, the damping device 103 particularly includes a volume changing device 105 configured as a piston-cylinder unit, or also referred to as a volume shifting unit. The volume changing device 105 has a cylinder 21 and a first pressure chamber 22 and a second pressure chamber 24 disposed therein. The first pressure chamber 22 is connected to the pump chamber 2 via a damping fluid interface 20a and a hydraulic connection pipe 20. The second pressure chamber is fluidly separated from the first pressure chamber 22 by means of a separating piston 23.

[0048] With this arrangement, a portion of the pressure medium contained in the pump chamber 2, particularly hydraulic oil, can flow into or out of the first pressure chamber 22 of the cylinder 21. The second pressure chamber 24 is connected via a pressure pipe 25 to the gas volume 10 of the pressure vessel 8 located on the inlet side, such that an average pressure corresponding to the average pressure in the storage vessel 8 appears in the second pressure chamber 24.

[0049] To dampen pulsations in pump chambers 2 and 4, as well as adjacent pipes 6 and 13, a throttling section 26 is introduced into the hydraulic connection pipe 20. If pressure increases due to pulsations in pump chamber 2, then if the release piston 23 is not in its position... Figure 2a At the terminal position 28 on the right side, this results in a volumetric flow from the pump chamber 2 into the first pressure chamber 22. When the flow passes through the throttling section 26, some of the pulsating energy is converted into heat, thereby reducing the level of pressure pulsation. If this immediately causes a decrease in pressure in the pump chamber 2, the pressure in the gas-filled pressure chamber 24 causes the piston 23 to move, resulting in a volumetric flow of the pressure medium 2a from the first pressure chamber 22 into the pump chamber 2, where hydraulic energy is again converted into heat at the throttling section 26, further reducing pulsation.

[0050] Therefore, the system is able to permanently convert pulsating energy into heat during the suction phase, provided that the movement of the separating piston 23 is not hindered by reaching one of the end stop or cylinder stop 27 or 28.

[0051] If the aforementioned compression occurs in pump chamber 2 after the suction phase has ended, then in Figure 2a The separating piston 23 then moves to the right again until it is stopped by the stop 28. Only now can further pressure be increased, and the medium 9 to be pumped can be delivered to the storage container via pipe 13. During this discharge phase, the pressure in pump chambers 2 and 4 is typically high enough to permanently stop the separating piston 23. Figure 2a The stop 28 is located on the right side.

[0052] exist Figure 2a If pump piston 1 moves to the left again, it causes a pressure reduction in chambers 2 and 4, pressure valve 14 closes again, and suction valve 7 opens when the pressure is lower than that of medium 9 in storage container 8, allowing medium 9 to flow into pump delivery chamber 4. Because the gas pressure in pressure chamber 10 is approximately the same as the pressure of medium 9 in storage container 8, a pressure difference is also created between the second pressure chamber 24 and the first pressure chamber 22 of piston cylinder unit 105. This pressure difference now causes the separating piston 23 to accelerate toward stop 27 again, so that the separating piston 23 oscillates freely again due to the pulsation in pump chamber 2, and throttle valve 26 can reduce the pulsation.

[0053] exist Figure 2b In the settings shown, according to Figure 2a The pulsation damping system 100 additionally extends a damping device 104 on the discharge side of the pump 101. Similar to the damping of pulsations during the suction phase, this damper 103 can also be used on the discharge side of the pump 101. In this case, the pump chamber 2 is fluidly connected to an additional volume changing device 106 via a pressure conduit 29. The volume changing device 106 is constructed in principle the same as the volume changing device 105.

[0054] The volume changing device 106 again has a cylinder 30 and a first pressure chamber 32 and a second pressure chamber 33 disposed therein. The first pressure chamber is connected to the pump chamber 2 via a damped fluid interface 29a and a hydraulic connection pipe 29. The second pressure chamber is fluidly separated from the first pressure chamber 32 by means of a separating piston 31.

[0055] The first pressure chamber 32 is filled with pressure medium 2a, and the second pressure chamber is filled with gas or air. Here, the gas or the second pressure chamber 33 is connected to the gas volume 17 of the storage container 15 via a pressure pipe 34 on the discharge side of the pump 101. During the suction phase of the pump 101, a small pressure exists in the pump chambers 2 and 4, causing overpressure in the gas volume 17 to move the separating piston 31 until it reaches the first stop 35 and stops there until the compression phase begins. When the opening pressure of the pressure valve 14 is exceeded, the pressure valve is opened, and simultaneously, a pressure increase occurs in the first pressure chamber 32, thereby... Figure 2b This causes the piston 31 to move to the right toward the second stop 37. At this time, the pulsation generated in the fluid 2a, or especially in the pump chambers 2 and 4 and the lines 6 and 13, causes the separating piston 31 to oscillate, in which energy is extracted from the pressure pulsation and converted into heat by the flow through the throttle valve 36 that accompanies the oscillation.

[0056] exist Figure 3 The diagram illustrates another application of the pulsation damping system 100 on a conventional or traditional piston pump 102, wherein in this case the device shown in the previous figure also has conduits 6, 13 connected to the pump 102, particularly for the inlet conduit 6 and outlet conduit 13 for the fluid medium 2a to be transported, and intermediate storage containers 8 and 15 advantageously disposed therein for transport requirements. (Refer to...) Figure 2b Therefore, in Figure 3 The pump 102 is designed in a different manner. It should be noted again at this point that the type of piston pump is not important to this invention.

[0057] In the current piston pump, the fluid medium 2a to be pumped is directly used as a medium to dampen pressure pulsations occurring in the pump chamber 4 and pipes 6 and 13. For this purpose, the fluid medium 2a can be pumped not only into or out of the pump chamber 4 through pipes 6 and 13 but also through pressure pipes 20 and 29 additionally connected to the pump chamber 4, which are connected to the pump chamber via damping fluid interfaces 20a and 29a respectively. In this case—furthermore, functionally similar to… Figure 2b The same fluid medium 2a for damping, now located in pump chamber 4, is additionally guided, depending on the working mode of piston 1, especially during suction or pressure processes, through throttling sections 26, 36 provided in the respective pipelines 6, 13 for damping pressure pulsations, toward or away from the damping devices 103, 104 on the respective inlet and outlet sides, especially by converting pressure energy into heat.

[0058] exist Figure 4a and 4b Another application feasibility of the pulsation damping system 100 is illustrated below. In some pump applications, as should be shown in this example, the storage container shown so far in the suction line 6 and / or pressure line 13, or in these two lines 6, 13, is omitted. Nevertheless, even in such pumping devices, the operating principle of the pulsation damping system 100 according to the invention can be applied. For this purpose—as shown in Figure 4a As shown in the diagram—the second pressure chamber 24 disposed on the volume changing device 105 on the inlet side—is as in Figure 4b As shown in the diagram—the second pressure chamber 33, additionally provided on the volume change device 106 on the outflow side, is also connected via pressure pipes—in Figure 4b The intermediate pressure conduit 34 is connected to an external compressed air supply device (not shown) via regulating valves 37 and 38. Therefore, the gas pressure applied to the respective second pressure chambers 24 and 33 can be set and regulated via the corresponding regulating valves 37 and 38, particularly for matching the corresponding pneumatic pressure in the second pressure chambers 24 and 33 to the average pressure of the suction conduit 6 or the pressure conduit 13. For this purpose, for example, it is possible to—as in Figure 4b As shown in the diagram—the pressure in the corresponding pipes 6 and 13 is determined via the corresponding pressure sensors 39 and 40, or as in... Figure 4a As shown in the diagram, the pressure is determined directly at the pump chamber 4 via at least one pressure sensor 43 and automatically adjusted via regulating devices 41 or 42 in the second pressure chambers 24 and 33. In addition to the pressure regulation shown here by means of pressure sensors / indicators and electronic regulators, mechanical regulating valves that convert hydraulic pressure into corresponding pneumatic pressure are also conceivable.

[0059] It should be clearly stated that the scope of protection of this invention is not limited to the described embodiments. In particular,—without changing the core content of this invention—the construction of the piston pump and the main pipeline connected thereto for conveying the fluid medium can be completely modified. Therefore, for example, it is not necessarily necessary to provide an intermediate storage container 8 in the inlet pipe and / or an intermediate container 15 in the outlet pipe. Furthermore, the design of the volume changing devices 105 and 106 can be configured differently, for example, a membrane can be provided instead of the separating pistons 23 and 31.

[0060] exist Figure 5 The diagram shows the principle construction of a piston diaphragm pump 2101 known from the prior art, with pipes 206, 213 connected thereto, and first storage containers 208, 215, respectively arranged in an advantageous manner for conveying the transport medium, or also referred to as intermediate containers or reserve containers.

[0061] The oscillating motion of piston 201 is transmitted to the pressure medium located in the first pressure chamber 202, which constitutes the pump working chamber. In terms of pressure transmission, this pressure medium is effectively connected via a flexible membrane 203 to a second pressure chamber 204, which is currently configured as the pump delivery chamber. Both pressure chambers 202 and 204 are surrounded by a pressure-resistant housing 205. Specifically, the fluid medium 209 to be delivered is present in the pump delivery chamber 204, which can enter the pump delivery chamber 204 from the pump inlet passage 206 via a fluid inlet and exit from the pump delivery chamber 204 into the pump outlet passage 213 via a fluid outlet. Specifically, the fluid 209 to be delivered can be drawn into the pump delivery chamber 4 from the pump inlet passage 206, also referred to as a suction pipe, in which a suction valve 207, constituting a check valve, is located.

[0062] In the prior art apparatus described herein, a first storage container 208, also referred to as a reservoir, is additionally provided on the inlet side of the suction conduit 206 of pump 2101. This first storage container 208 is filled with the fluid 209 to be transported in a lower sub-region 208a, and with a pressurized gas 210, such as compressed air, in an upper sub-region 208b. The lower sub-region 208a of the first storage container 208 is fluidly connected to the pump inlet passage 206, particularly via a fluid inlet 206a toward a fluid source 211 (not shown in detail) and a fluid outlet 206b connected to a conduit section 206c of the pump inlet passage 206, which connects the first storage container 208 to the pump chamber 204. The source 211 is typically a tank with an elevated geodetic height relative to pump 2101, thereby enabling the provision of the required suction pressure. The lower sub-region 208a and the upper sub-region 208b of the first storage container 208 can, in principle, be fluidly separated from each other by, for example, a transfer body configured as a membrane. In the present case, the lower sub-region 208a and the upper sub-region 208b are separated due to the different configurations and densities of the fluid 209 and the gas 210, forming a liquid level height 232 on the separation surface, wherein the corresponding liquid level 232 in the first storage container 208 is regulated by the pressure of the gas 210. By measuring the liquid level height 232 in the first storage container 208, the gas pressure 210 can be changed, in particular, via the regulating valve 212, so that the preset liquid level height 232 in the first storage container 208 can be regulated as precisely as possible. To set or regulate the gas pressure present in the first storage container 208, the inlet-side first storage container 208 is connected to a gas source (not shown) via a pneumatic or pressure conduit provided in the region of the gas volume 210 and via the regulating valve 212. Alternatively, the first storage container 208 on the inflow side can also be loaded via a feed pump, which is not shown at present, and the feed pump then generates the necessary suction pressure in the suction pipe 6.

[0063] In the outlet pipe 213, which contains a pressure valve 214 that serves as a backflow valve, there is another outlet-side first storage container 215, also constructed as a storage container. The outlet-side first storage container 215, particularly the lower region 215a of the first storage container 215, is fluidly connected to the pump outlet pipe 213 via a fluid inlet 213a connected to a pipe section 213c connected to the pump outlet pipe 213 and via a fluid outlet 213b connected to a fluid outlet pipe 219 (not shown in detail). This pipe section connects the pump chamber 204 to the outlet-side first storage container 215.

[0064] Similar to the suction side of pump 2101, and especially similar to the first storage container 208 disposed thereon, the fluid 209 to be pumped is also located in the lower region 215a of the first storage container 215 on the outflow side, while above it, in the upper region 215b, there is a pressurized gas or air volume 217. The lower sub-region 215a and the upper sub-region 215b are not currently fluidly separated from each other by a separate separation mechanism such as a transfer body, but are separated due to the different configurations and densities of the fluid 209 and the gas 217, forming a liquid level height 216 at the separation surface. Here, the liquid level 216 of the first storage container 215 on the outflow side can also be regulated via a regulating valve 218 fluidly connected to the gas volume 217 and a gas source (not shown in detail) connected thereto. The volumetric flow of the transport fluid 209 generated by pump 2101 can be delivered to an application (not shown) via discharge pipe 219.

[0065] The function of such a pump 2101 can be described as follows: During the suction phase of the piston pump 2101 shown, the piston 201 moves from... Figure 5 The rightmost position shown in the diagram shifts to the left, causing a pressure drop in the pump chamber 202. This pressure is transmitted to the fluid 209 to be pumped via the flexible membrane 203, which was in position 203a at the start of the suction phase, to the pump delivery chamber 204. If the pressure in the two pressure chambers 202 and 204 of the pump 2101 drops below the pressure present in the inlet pipe 206 and the first storage container 208 on the inlet side, the suction valve 207 automatically opens, and the fluid 209 to be pumped flows from the first storage container 208 on the inlet side into the pump delivery chamber 204.

[0066] Once piston 201 reaches Figure 5 As shown in the leftmost position, the piston then moves to the right again. This causes compression in the two pressure chambers 202 and 204. This pressure increase causes the suction valve 207 to close and stop pumping other fluid 209. If the piston 201 now moves further to the right, the pressure in the two pressure chambers 202 and 204 continues to increase until it exceeds the pressure present in the outlet pipe 213 and the first storage container 215. Therefore, the pressure valve 214 opens, and the pump 2101 delivers fluid 209 from the pump delivery chamber 204 to the storage container 215 until the piston 201 reaches the rightmost position again, and the process repeats.

[0067] The oscillating motion of piston 201 applies an acceleration effect to the fluid medium 209 to be transported, which can cause pulsations in pressure chambers 202 and 204, adjacent suction pipe 206, and discharge pipe 213. To reduce these pulsations, a pulsation damper system 2100 according to the invention is described below, which can first reduce the pulsations propagating in the suction medium 209.

[0068] exist Figure 6 The diagram illustrates a first design of a pulsation damping system 2100 according to the present invention. This design, for example, is shown in… Figure 5 The typical configuration of the piston diaphragm pump system shown includes an additional second storage container 220 located on the pump inlet side. The second storage container 220 is also constructed as a storage or pressure vessel and has a first region or pressure chamber 220a and a second pressure chamber 220b. The region 220a, currently at the lower part of the second storage container 220 on the inlet side, is fluidly connected to the pump inlet passage 206 via a branch line 221 and is filled with the delivery fluid 209. The interface of the branch line 221 at the pump inlet passage 206 is located as close as possible to the pump chamber 204, but always upstream of the check valve or inlet valve 207 along the flow direction, particularly in the line section 206c. With this arrangement, a portion of the delivery fluid 209 contained in the pump inlet passage 206 is able to flow into and out of the first pressure chamber 220a.

[0069] A gas volume 225 is formed in the upper region or pressure chamber 220b—as is the case in the first storage container 208. The second pressure chamber 220b is connected to the gas volume 210 of the first storage container 208 located on the inlet side via a pressure conduit 223, such that an average pressure corresponding to the average pressure in the first storage container 208 occurs in the second pressure chamber 220b. This specifically results in the same geodetic liquid level height 222 occurring in the second storage container 220 on the inlet side when the pump 2101 is stationary, which is also present in the first storage container 208 on the inlet side.

[0070] If a pressure pulsation occurs in the suction pipe 6 of pump 2101 during operation, this pressure pulsation, upon pressure increase, causes the fluid 209 to be pumped to flow from the pump inlet channel 206 through the branch pipe 221 into the first pressure chamber 220a of the second storage container 220. To effectively dampen the pulsations in pump chambers 202 and 204 and adjacent pipes 206 and 213, a throttling section 224 is introduced into the branch pipe 221. Therefore, when flowing through the throttling section 224, some of the pulsation energy is converted into heat, thereby reducing the level of pressure pulsation. If a pressure decrease occurs immediately afterward in the pump inlet channel 206, the pressure in the gas-filled pressure chamber 220b leads to an increased back pressure, resulting in displacement, particularly a decrease in the liquid level height 222 and a volumetric flow of fluid 209 from the first pressure chamber 220a into the pump inlet channel 206, where the pressure energy is reconverted into heat at the throttling section 224, further reducing the pulsation.

[0071] If compression occurs in pump chamber 204 after the suction phase ends, suction valve 207 closes again and the fluid 209 to be pumped is delivered via pipe 213 to the first storage container 215 on the outflow side. In this case, a brief pressure drop can occur in suction pipe 206, allowing a portion of the fluid 209 to flow back from second storage container 220 into suction pipe 206, where hydraulic energy is converted into heat and pulsation is further reduced at the through-flow throttle valve 224. Thus, the system can persistently convert pulsating energy into heat, especially during the suction phase.

[0072] Because frictional losses and flow effects in the suction pipe 206 cause slightly different average pressures in containers 208 and 220, different average geodetic liquid level heights 222 and 232 are formed in containers 208 and 220, respectively. To prevent cavitation or overfilling of container 220, which could significantly impair the function of the damper, the adjustment of the liquid level height 232 in container 208 and the installation height, as well as the dimensions of container 220, are coordinated with each other.

[0073] Therefore in Figure 6 The damper shown reduces pulsations present in the suction region of pump 2101. However, since similar pulsations may also occur on the discharge side of pump 2101, therefore... Figure 7 The diagram shows a second design of the pulsation damping system 2100, in which, in addition to the suction damper, a pulsation damper for the pressure pipeline is also provided.

[0074] exist Figure 7 In the device shown, according to Figure 6The pulsation damping system 2100 is additionally extended with a second storage container 226 disposed on the discharge side of the pump 2101 and a throttling section 230 in the inlet pipe leading to the second storage container 226. Similar to the arrangement of the second storage container 220 on the suction side, even when disposed on the discharge side, the pressure pulsation energy when the fluid 209 flows through the throttling valve 230 is converted into heat. Similar assumptions and preconditions as those for the damper on the suction side also apply here. Therefore, the construction and function of the second storage container 226 on the outlet side, and its integration into the piping system to the outlet side, are substantially the same as the arrangement of the second storage container 220 on the pump inlet side.

[0075] In the second storage container 226 on the outflow side, a region or pressure chamber 226a filled with fluid 209 is formed again in the lower portion, and a region or pressure chamber 226b filled with gas volume 231 is formed in the upper portion. The lower region 226a is fluidly connected to the pump outlet passage 213 via a branch pipe 227. The interface of the branch pipe 227 at the pump outlet passage 213 is as close as possible to the pump chamber 204, but is always located downstream of the check valve or outlet valve 214 along the flow direction, particularly in the region of pipe section 213c. This arrangement allows a portion of the conveying fluid 209 contained in the pump outlet passage 213 to flow into or out of the first pressure chamber 26a.

[0076] The upper pressure chamber 226b—as in the first storage container 208 on the inlet side—constitutes a gas volume 231. The second pressure chamber 220b is connected via a pressure conduit 229 to a gas volume 217 located in the first storage container 215 on the outlet side, such that an average pressure corresponding to the average pressure in the first storage container 215 appears in the second pressure chamber 226b. This specifically results in the same geodetic liquid level height 228 appearing in the second storage container 226 on the outlet side when the pump is stationary, a height also present in the first storage container 215 on the outlet side. If a pressure pulsation occurs in the high-pressure conduit 213 of the pump 2101 during pump operation, this pressure increase causes the fluid 209 to be pumped to flow from the pressure conduit 213 into the second storage container 226. In this case, a portion of the pulsating energy is again converted into heat at the flow throttling section 230, thereby reducing the pressure pulsation. If a pressure drop subsequently occurs in the pump outlet channel 213, the pressure in the gas-filled pressure chamber 226b leads to an increased back pressure, resulting in displacement, particularly a decrease in the liquid level height 228 and a volumetric flow of fluid 209 from the first pressure chamber 226a into the pump outlet channel 213. At the throttling point 230, pressure energy is again converted into heat, further reducing pulsation. Therefore, this system is able to persistently convert pulsating energy into heat not only during the suction phase but also during the pressure phase.

[0077] It should be clarified that the pump design with only one piston described herein exists relatively rarely in practice, and in this case, only the operating principle of this pump configuration is illustrated. Pumps with multiple pistons are typically used, drawing from a common suction line with a central reservoir and then delivering back to a common delivery line. Therefore, the principles of position damping presented herein can be applied to pumps with any number of pistons. Furthermore, it is not necessarily a diaphragm pump; pulsation damping systems can also be applied to other pumps, such as conventional piston pumps.

[0078] Furthermore, it should be clarified that the scope of protection of this invention is not limited to the described embodiments. In particular,—without changing the core content of this invention—the construction of the piston pump and the main pipeline connected thereto for conveying the fluid medium can be completely modified. Therefore, for example, it is not necessarily required to fluidly connect the first storage container and the second storage container. Moreover, the first and second storage containers can be designed in different ways; for example, a baffle or a separating piston can be used instead of the membrane disposed in the first and second storage containers.

[0079] List of reference numerals

[0080] 1 Piston

[0081] 2. Pump working chamber, pump room, pressure chamber

[0082] 2a Pressure medium, fluid, hydraulic oil

[0083] 3. 3a membrane

[0084] 4. Pump delivery chamber, pump room, pressure chamber

[0085] 5. Housing

[0086] 6. Pump inlet channel, suction pipe

[0087] 6a Fluid delivery interface

[0088] 7. Check valve, suction valve

[0089] 8. Storage containers, pressure vessels

[0090] 9. Transport medium, fluid

[0091] 10. Gas, compressed air, gas volume

[0092] 11 Source

[0093] 12 Control valve

[0094] 13 Pump outlet channel, outlet pipe

[0095] 13a Fluid delivery interface

[0096] 14. Check valve, pressure valve

[0097] 15. Storage containers

[0098] 17. Gas, compressed air, gas volume

[0099] 18. Control valve

[0100] 19 Discharge pipe

[0101] 20. Piping, damping pressure piping on the inlet side.

[0102] 20a Damped Fluid Interface

[0103] 21 cylinders

[0104] 22 First pressure chamber

[0105] 23. Transfer body, separating piston

[0106] 24 Second pressure chamber

[0107] 25. Pipeline, gas pressure pipeline

[0108] 26. Throttling valve, throttle device

[0109] 27 First stop component

[0110] 28 Second stop component

[0111] 29. Piping, damping pressure piping on the outflow side.

[0112] 29a Damped Fluid Interface

[0113] 30 cylinders

[0114] 31. Transfer body, separating piston

[0115] 32 First pressure chamber

[0116] 33 Second pressure chamber

[0117] 34. Piping, gas pressure piping

[0118] 35 First stop component

[0119] 36. Throttling valve, throttle device

[0120] 37 Second stop

[0121] 100 Pressure Pulsation Damping System

[0122] 101 Piston Diaphragm Pump

[0123] 102 Piston Pump

[0124] 103 Damping device

[0125] 104 Damping device

[0126] 105 Volume changing device

[0127] 106 Volume changing device

[0128] 201 Piston

[0129] 202 Pump working chamber, pump room, pressure chamber

[0130] 203 and 203a membranes

[0131] 204 Pump delivery chamber, pump room, pressure chamber

[0132] 205 Housing

[0133] 206 Pump inlet channel, suction pipe

[0134] 206a Fluid inlet section

[0135] 206b Fluid outflow section

[0136] 206c Pipeline Section

[0137] 207 Check valve, suction valve

[0138] 208 First storage container, pressure vessel

[0139] 208a First Area

[0140] 208b Second Zone

[0141] 209. Transport medium, fluid

[0142] 210 Gas, compressed air, gas volume

[0143] 211 Source

[0144] 212 Control valve

[0145] 213 Pump outlet channel, outlet pipe

[0146] 213a Fluid inlet section

[0147] 213b Fluid outflow section

[0148] 213c Pipeline Section

[0149] 214 Check valve, pressure valve

[0150] 215 First storage container, pressure vessel

[0151] 215a First Region

[0152] 215b Second Zone

[0153] 216 Liquid Level Height

[0154] 217 Gas, compressed air, gas volume

[0155] 218 Control valve

[0156] 219 Drain pipe, exit pipe

[0157] 220 Second storage container, pressure vessel

[0158] 220a First Area

[0159] 220b Second Zone

[0160] 221 Branch Pipeline

[0161] 222 Liquid Level Height

[0162] 223 Branch piping, compressed air piping

[0163] 224 Throttling valve, throttle device

[0164] 225 Air, compressed air, gas volume

[0165] 226 Second storage container, pressure vessel

[0166] 226a First Region

[0167] 226b Second Region

[0168] 227 Branch Pipeline

[0169] 228 Liquid Level Height

[0170] 229 Auxiliary piping, compressed air piping

[0171] 230 Throttling valve, throttle device

[0172] 231 Gas, compressed air, gas volume

[0173] 232 Liquid Level Height

[0174] 2100 Pressure Pulsation Damping System

[0175] 2101 Piston Pump

Claims

1. A pulsation damping system (100) for reducing pressure vibrations in the inlet and / or outlet piping (6, 13) of piston pumps (101, 102), the pulsation damping system having at least one piston pump (101, 102) having pump chambers (2, 4), wherein the pump chambers (2, 4) are connected to the pump inlet passage (6) via a first fluid interface (6a) and to the pump outlet passage (13) via a second fluid interface (13a) for conveying a transport medium (9). Furthermore, the pump chambers (2, 4) additionally have at least one damping fluid interface (20a, 29a), by means of which the pump chambers (2, 4) are respectively fluidly connected to damping devices (103, 104) for damping the pressure vibrations. Its features are, Throttling valves (26, 36) are installed in the pipelines (20, 29) between the pump chambers (2, 4) and the damping devices (103, 104).

2. The system according to claim 1, characterized in that, The damping device (103, 104) has a volume changing device (105, 106) for changing the volume of at least one pressure chamber (22, 32) that is fluidly connected to the pump chamber (2, 4).

3. The system according to claim 2, characterized in that, The volume changing device (105, 106) has a transfer body (23, 31) for changing the volume of the at least one pressure chamber (22, 24, 32, 33).

4. The system according to claim 3, characterized in that, The volume changing device (105, 106) has a first pressure chamber (22, 32) fluidly connected to the pump chamber and a second pressure chamber (24, 33) fluidly separated from the first pressure chamber by means of the transfer body (23, 31) and effectively connected to the first pressure chamber.

5. The system according to claim 4, characterized in that, In order to regulate the gas pressure present in the second pressure chamber (24, 33), the second pressure chamber (24, 33) can be directly and / or indirectly connected to a separate gas source fluid via regulating valves (12, 18, 37, 38).

6. The system according to claim 4 or 5, characterized in that, In order to regulate the gas pressure present in the second pressure chamber (24, 33), the second pressure chamber (24, 33) is directly or indirectly connected to the pressure present in the pump inlet channel (6) and / or the pump outlet channel (13).

7. The system according to claim 1 or 2, characterized in that, The damping device (103, 104) has a storage container (8, 15) disposed in the pump inlet channel (6) and / or the pump outlet channel (13), the storage container having a fluid inlet section (8a, 15a) and a fluid outlet section (8b, 15b), wherein the conveying medium (9) can be temporarily stored in the lower region in the storage container (8, 15), and the gas volume (10, 17) is disposed in the upper region.

8. The system according to claim 7, characterized in that, The gas volumes (10, 17) of the storage containers (8, 15) are fluidly connected to the second pressure chambers (24, 33) of the volume changing devices (105, 106).

9. The system according to claim 1 or 2, characterized in that, The piston pump is configured as a piston diaphragm pump (101), the piston diaphragm pump having a pump chamber (2) and a pump delivery chamber (4) which is fluidly separated from and effectively connected to the pump chamber, wherein the first fluid interface (6a) and the second fluid interface (13a) are provided in the pump delivery chamber (4) and the at least one damping fluid interface (20a, 29a) is provided in the pump chamber (2).

10. The system according to claim 3, characterized in that, The transfer body is configured as a movable wall, a movable piston, or a transferable membrane.

11. A pulsation damping system (2100) for reducing pressure vibrations in pipelines (206, 213) on the inlet and / or outlet sides of a piston pump (2101), the pulsation damping system having at least one pump inlet passage (206) and pump outlet passage (213) fluidly connected to a pump chamber (4) of the piston pump (2101), wherein a first storage container (208, 215) is provided in the pump inlet passage (206) and / or pump outlet passage (213), in which a fluid (209) to be transported can be temporarily stored in a first region (208a, 215a), and a gas volume (210, 217) is provided in a second region (208b, 215b). Its features are, To dampen pressure vibrations in the piping sections (206c, 213c) of the pump inlet channel (206) and / or the pump outlet channel (213), a second storage container (220, 226) is additionally provided, the piping section fluidly connecting the first storage container (208, 215) and the pump chamber (204).

12. The system according to claim 11, characterized in that, The second storage container (220, 226) is filled with the transport fluid (209) to be transported in the first region (220a, 226a) and filled with gas volume (225, 231) in the second region (220b, 226b).

13. The system according to claim 11 or 12, characterized in that, The second storage container (220, 226) is connected to a section (206c, 213c) of the pump inlet channel (206) or the pump outlet channel (213) via a branch line (221, 227), and a throttle valve (224, 230) is provided in the branch line (221, 227).

14. The system according to any one of claims 11 to 12, characterized in that, The first storage container (208) disposed in the pump inlet channel (206) is directly or indirectly fluidly connected to the fluid source (211) via the fluid inlet section (206a) and directly or indirectly fluidly connected to the second storage container (220, 226) via the fluid outlet section (206b), and / or the first storage container (215) disposed in the pump outlet channel (213) is directly or indirectly fluidly connected to the second storage container (220, 226) via the fluid inlet section (213a) and directly or indirectly fluidly connected to the outlet pipe (219) via the fluid outlet section (213b).

15. The system according to any one of claims 11 to 12, characterized in that, In order to regulate the gas pressure, the gas volume (225, 231) of the second storage container (220, 226) and / or the gas volume (210, 217) of the first storage container (208, 215) can be directly and / or indirectly connected to a separate gas source fluid via regulating valves (212, 218).

16. The system according to claim 12, characterized in that, The gas volumes (225, 231) of the second storage containers (220, 226) are fluidly connected to the gas volumes (210, 217) of the first storage containers (208, 215).

17. The system according to any one of claims 11 to 12, characterized in that, Check valves (207, 214) are provided in the pipeline section (206c, 213c) located between the pump chamber (204) and the first storage container (208, 215).

18. The system according to any one of claims 11 to 12, characterized in that, The second storage container (220) on the pump inlet side is fluidly connected to the pump inlet channel (206) in the flow direction downstream of the first storage container (208) on the pump inlet side and upstream of the pump chamber (204), and / or the second storage container (226) on the pump outlet side is fluidly connected to the pump outlet channel (213) downstream of the pump chamber (204) and upstream of the first storage container (215) on the pump outlet side.

19. The system according to any one of claims 11 to 12, characterized in that, In order to separate the fluid in the first storage container (208, 215) and / or in the second storage container (220, 226) the first region (208a, 215a, 220a, 226a) and the second region (208b, 215b, 220b, 226b), a transfer body with a defined liquid level height (216, 222, 228, 232) is provided between the fluid (209) and the gas volume (210, 217, 225, 231).

20. The system according to any one of claims 11 to 12, characterized in that, The piston pump (2101) is configured as a piston diaphragm pump having a pump working chamber (202) and a pump delivery chamber (4) that is fluidly separated from and effectively connected to the pump working chamber.

21. The system according to claim 12, characterized in that, The first region (220a, 226a) of the second storage container (220, 226) is connected via branch pipes (221, 227) to a pipe section (206c, 213c) of the pump inlet channel (206) or the pump outlet channel (213).

22. The system according to claim 16, characterized in that, The gas volumes (225, 231) of the second storage containers (220, 226) and the gas volumes (210, 217) of the first storage containers (208, 215) are fluidly connected via separate auxiliary lines (223, 229).

23. The system according to claim 18, characterized in that, The second storage container (220) on the pump inlet side is fluidly connected to the pump inlet channel (206) downstream of the first storage container (208) on the pump inlet side and upstream of the check valve (207) in the flow direction, and / or the second storage container (226) on the pump outlet side is fluidly connected to the pump outlet channel (213) downstream of the check valve (214) and upstream of the first storage container (215) on the pump outlet side.

24. The system according to claim 19, characterized in that, The transfer body is configured as a movable wall, a movable piston, or a transferable membrane.

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