Valve and diaphragm pump with inlet valve and outlet valve

Abstract

The present invention relates to a valve (100), particularly a flat plate valve or check valve, for a diaphragm pump, the valve comprising a valve chamber (14) defined by a valve housing, wherein at least one valve seat (4) is provided in the valve chamber, the valve seat interacting with a valve plate (10), the valve plate (10) being elastically pre-tightened by stretching via an external edge retainer (101), such that a closing body (1) of the valve plate (10) can move from a closed position to an open position, at least in the region of its external edge retainer (101), overcoming the elasticity of the valve plate (10), in which the closing body (1) is sealingly abutting against the valve seat (4), wherein the external edge retainer (101) of the valve plate (10) has a web (2) and the external edge retainer (101) has a connecting clamp (5) connected to the end of the web (2) opposite to the web of the closing body (1). The valve (100) according to the invention is characterized in that each of the external edge retaining portions (101) acts only on the closing body (1) in a manner that is not connected to each other, each external edge retaining portion (101) having at least two webs (2), the webs (2) of each external edge retaining portion (101) being connected to each other by connecting clamps (5), and each connecting clamp (5) engaging from the rear at least one disposed retaining base (7) of the valve housing, and the connecting clamp (5) laterally protruding from its disposed retaining base (7) on both sides, such that the connecting clamp (5) is pre-tightened outward by bending. The invention also relates to a diaphragm pump in which a valve according to the invention is provided as an inlet valve and / or an outlet valve (see FIG. 1).

Description

Technical Field

[0001] The present invention relates to a valve, particularly a flat plate valve or check valve, for example for a diaphragm pump, having a valve chamber defined by a valve housing, wherein at least one valve seat is provided in the valve chamber, the valve seat interacting with a valve plate, the valve plate being elastically pre-tightened by stretching through an outer edge retainer, such that a closing body of the valve plate can overcome the elasticity of the valve plate at least in the region of its outer edge retainer and move from a closed position to an open position, in which the closing body is sealingly abutting against the valve seat, wherein the outer edge retainer of the valve plate has a web and a connecting clamp connected to the web end of the web opposite to the closing body.

[0002] The present invention also relates to a diaphragm pump having at least one inlet valve and at least one outlet valve. Background Technology

[0003] A valve of the type described at the beginning is known from EP 1 555 469 A1, having a valve chamber surrounded by a valve body, in which at least one valve seat is provided. The valve seat surrounding the valve opening interacts with a valve plate made of an elastic material. The valve plate is held in the valve body by external edge retainers and is pre-tensioned such that the plate-shaped closing body of the valve plate is sealed against the valve seat in the closed position of the valve and is capable of moving to the open position of the valve plate, at least in the region of its external edge retainers, due to a pressure differential, overcoming the elasticity of the valve plate in the open position, in which the closing body rises from the valve seat. Here, each external edge retainer of the valve plate has a transverse web, which is connected to an anchor-shaped transverse web at its web end opposite to the closing body. These transverse webs are clamped in corresponding grooves in the valve body.

[0004] In this so-called anchoring valve according to EP 1 555 469 A1, although the valve plate does not perform an additional sealing function between the housing components surrounding the valve body and the valve chamber disposed within the valve body, and avoids compression in the sealing area that would adversely affect the function of the valve plate, a gap must be present around the valve plate in the valve chamber because the elastic material used for the valve plate is not always chemically resistant to the conveyed medium and may expand slightly. Otherwise, the valve plate may bend upon expansion, and its function may be adversely affected. However, due to this gap, the known anchoring valve may lose its form-locking positioning, and the position of the valve plate and its closing body above the valve seat is no longer uniquely defined.

[0005] A discharge valve for a refrigerant compressor is known from US 3,039,487 A.

[0006] According to DE 10 2016 002 071 A1, a plate-shaped valve section is suitable for, for example, valves of diaphragm pumps, and has a central closure body for loading the valve seat. The valve section has a section edge for edge tensioning of the valve section between two housing components, particularly between two head plates of the pump head of a diaphragm pump, and has a plurality of section webs respectively connected to the closure body and the section edge, wherein at least two adjacently arranged section webs emanating from the closure body are at least partially bent in opposite directions and / or angled in opposite directions.

[0007] To ensure a tight seal when the valve seat is closed in the anchored valve position, the seat typically protrudes beyond the adjacent plane of the valve body. The greater the tolerance of this protrusion, the less the valve plate and its closing body seal against the seat, especially when the valve is stationary. Therefore, very small manufacturing tolerances are required for optimal closing performance, but this is particularly costly to achieve, especially in micropumps. Finally, particularly in micropumps, this known anchored valve is difficult to install into the valve body using automated manufacturing methods.

[0008] A check valve is known from EP 0 336 307 A2, in which the valve plate has an annular seal on its outer periphery, which is connected to a central closing body inside the valve plate via multiple webs. Therefore, even if the valve plate is made of a hard, elastic, or relatively rigid material, the closing body can be valved relative to the annular seal clamped in the valve body. The webs extend transversely radially between the outer sealing ring and the inner closing body, allowing the closing body to slightly twist relative to the sealing ring during valve movement and simultaneously open or close. However, because the sealing ring of the valve plate is clamped in the valve body in this known flat plate valve, the adverse effects of compression on the valve plate's function are generally unavoidable.

[0009] A pump assembly is known from EP 2 849 812 A2, which includes an oscillating coil, a magnet, and a diaphragm. The oscillating coil is configured to move the diaphragm in response to a drive signal applied to the oscillating coil to pump fluid through the pump assembly. Summary of the Invention

[0010] Therefore, the task is to provide a valve of the type described at the beginning, which can be easily installed in a valve housing even in automated manufacturing, and which has the advantage of improved functionality. Furthermore, the task also involves providing a diaphragm pump having a valve configured as an inlet valve and / or an outlet valve.

[0011] The solution to this problem according to the invention, particularly in valves of the type described at the beginning, is that the outer edge retainers act only on the closing body in a manner that they are not connected to each other, each outer edge retainer having at least two webs, the webs of each edge retainer being connected to each other by connecting clamps, and each connecting clamp engaging at least one configured retaining base of the valve housing from the rear.

[0012] Furthermore, the valve according to the invention has a valve chamber surrounded by a valve body, in which at least one valve seat is provided. The valve seat interacts with a valve plate, which is elastically pre-tightened by tension through an outer edge retainer, such that the preferred plate-shaped closing body of the valve plate is sealed against the valve seat in the closed position of the valve, so that it moves from there to the open position by overcoming the inherent elasticity of the material for the valve plate, at least in the region of the outer edge retainer, through a positive pressure differential. Here, the outer edge retainer of the valve plate has a web and connecting clamps, which are connected to the web ends of the webs opposite to the closing body. According to the invention, the outer edge retainers of the valve plate act only on the closing body of the valve plate in a manner that they are not connected to each other, wherein each outer edge retainer has at least two webs for this purpose. Here, the webs of each edge retainer are connected to each other by a common connecting clamp, wherein each connecting clamp engages from behind at least one disposed retaining base of the valve body. Since each of these connecting clamps engages with at least one configured retaining base of the valve housing from the rear, compression of the valve plate, at least in the area of ​​its connecting clamp, which could potentially adversely affect its function, is not necessary. Because the valve plate is properly held in the valve housing by the corresponding connecting clamp positions engaging with at least one retaining base of the valve housing from the rear, the valve plate can also be easily installed in an automated manufacturing method. Here, the valve plate's closing body can be easily lifted from the valve seat under positive pressure differential, where only a small flow cross-section around the closing body is blocked by the web, while under negative pressure differential, the valve plate is sealed against the valve seat with its closing body and reliably closes it. Here, only a relatively small (dead zone) space in the valve housing is used for the outer edge retaining portion of the valve plate.

[0013] In the valve according to the invention, the outer edge retaining portions do not have a common surrounding connecting element that may also be used for sealing, which is connected to the central closing body via webs spaced apart from each other in the circumferential direction. Conversely, a preferred extension according to the invention proposes the opposite: the connecting clamps of the outer edge retaining portions are connected to the closing body separately via webs respectively provided thereto. Because the connecting clamps of the outer edge retaining portions are connected to the closing body separately via webs respectively provided thereto, and because the tensile force thus defined acts on the closing body, it is advantageous to position the closing body appropriately in the closed position of the valve.

[0014] If each edge retainer has a centering geometry that interacts with a preferred complementary geometry of at least one disposed retainer base, it is advantageous to properly position the shut-off body in the closed position of the valve and to apply a tensile force to the shut-off body via the web of the external edge retainer.

[0015] It is possible that at least one of the external edge retaining parts is connected to the central closing body via two or more webs.

[0016] However, an embodiment of the invention, which is simple in structure and can be manufactured with relatively little cost, is proposed in the opposite direction: each edge retainer has a pair of webs that are connected to each other at their ends opposite the closing body by a common connecting clamp.

[0017] According to a preferred embodiment of the invention, each edge retaining portion has a connecting clamp having at least one centering or positioning convex and / or concave portion that interacts with a complementary mating portion on at least one disposed retaining base.

[0018] Therefore, the connecting clamp of the outer edge retaining portion may, for example, have at least one convex portion on its inner side facing the retaining base, which is configured, for example, as a convex centering geometry and received in a concave portion of a preferred complementary configuration on the adjacent side of the retaining base to laterally position the valve plate.

[0019] Alternatively, another embodiment proposes that the connecting clamp of the outer edge retaining portion has at least one concave portion on its inner side facing the retaining base, which is configured, for example, as a recessed centering geometry and interacts with a preferably complementary convex portion on the adjacent side of the retaining base to laterally position the valve plate. It is also possible that the connecting clamp has a centering geometry on its side facing the retaining base, which has at least one convex portion and at least one concave portion, and which interacts with a preferably complementary mating geometry in adjacent circumferential portions of the disposed retaining base.

[0020] In order to reliably and securely engage the centering geometry on one side of the edge retaining portion and the mating geometry on the corresponding retaining base on the other side, free from valve movement and valve position, it is advantageous that the centering geometry utilizes the area of ​​the retaining portion on the edge side that is not moving away from the plane and is therefore preferably arranged in the area of ​​the connecting clamp.

[0021] If the centering geometry on the external edge retaining portion is configured as a convex shape, it is advantageous that the connecting clamp of each edge retaining portion has a convex shape that is generally centrally arranged and preferably generally cam-shaped, thereby ensuring that the valve plate is accurately positioned on the valve opening and the closing body is accurately positioned on the valve seat.

[0022] To ensure that the web of the edge retainer produces the smallest possible flow cross-section in the open position of the valve, it is advantageous that the webs of the edge retainers arranged on opposite sides of the valve plate are arranged in pairs along a generally straight line, preferably extending generally tangentially to the closing body. This simultaneously ensures that the tension direction of the web is at least primarily tangential and therefore does not act radially on the central closing body under any circumstances.

[0023] In order to enable the connecting clamps of each edge retaining part to be reliably and positionally abutted against the adjacent outer peripheral side of the provided retaining base, it is advantageous that at least one retaining base is constructed in a particularly convex, curved or rounded manner in the circumferential region loaded by the provided connecting clamps.

[0024] When the valve housing is enclosed and defined between housing components that are close to each other, it is additionally easy to realize manual and, if necessary, automated installation of the valve according to the invention.

[0025] To automate valve installation during the assembly of valve housing components forming the valve housing, it is advantageous that at least one external edge retainer has a shaped bevel and / or an insertion bevel in the valve housing component receiving the valve plate, which elastically preloads the valve plate in the plane of the receiving valve housing component during assembly. A preferred embodiment is one in which the receiving geometry of the valve housing components abutting each other has an insertion bevel that positions the valve plate between the valve housing components in a preloaded working position on its edge retainer when the valve housing components are engaged.

[0026] The valve seat protrudes beyond the plane formed by the retaining portion on the edge side of the valve plate, which facilitates sealing the closing body provided on the valve plate against the valve seat.

[0027] To facilitate high mobility and long stroke of the web at each edge retaining portion even under relatively small forces, it is advantageous that the arcuate shape formed by the web and the connecting clamps thereto is pre-tensioned outward by bending. Therefore, according to the invention, the connecting clamps protrude laterally from their respective retaining bases on both sides, such that the connecting clamps connected to the web are pre-tensioned outward by bending.

[0028] To facilitate reliable valve plate arrangement in the installed state, the web and connecting clamp of each edge retainer are designed such that pre-tightening deformation occurs in most (at least more than half) of the connecting clamp (bending portion) and at least in the web (tensile strain) of each edge retainer. For this purpose, it is desirable that each connecting clamp is designed such that the deformation due to pre-tightening in the region of the edge retainer within its connecting clamp is greater than the deformation in the region of the web.

[0029] In order to compensate for valve movement, especially in the connecting clamp of the edge retainer and to make less use of the elasticity of the valve plate in the area of ​​the web, it is advantageous that the connecting clamp of the web and the edge retainer is designed such that, compared with the closed position, more than half of the extension of the distance between the convex portions arranged on opposite sides of the valve plate in the open position is compensated by the additional bending of the connecting clamp.

[0030] To prevent the valve plate from accidentally detaching from the retaining bases arranged on both sides of the valve body during valve installation, it is advantageous that each retaining base has a height greater than the thickness of the valve plate relative to the adjacent plane of the valve body.

[0031] In order to ensure that even when the valve plate expands, especially under the action of the conveying medium, and thus causes the valve plate to expand in all three dimensions, tensile stress will still act on the outer edge retainer, it is advantageous that the valve plate is pre-tightly held between the retaining bases arranged on both sides of the valve seat, so that even when the material used for the valve plate expands, tensile stress will act on the web of the retainer on the edge side.

[0032] In order for the valve plate's closing body to seal against the valve seat across its entire circumference in the closed position of the valve, it is advantageous for the valve seat to protrude beyond the adjacent plane of the valve body.

[0033] Even under high positive pressure differentials, valve functionality is always ensured by providing at least one lifting gripper on the valve body side away from the valve seat, which protrudes from the adjacent plane of the valve body and limits the maximum offset of the closing body in the open position of the valve.

[0034] To prevent excessive bending of the valve plate in the closed position of the valve, it is advantageous that the connection portion of the web plate on the central closed body has the same width as or is narrower than the web plate. Therefore, according to a preferred embodiment of the invention, the web plate has a constant cross-section in the region between the connecting clamp on one side and its connection portion on the closed body on the other side, or the web plate has a reduced or narrowed cross-section in the region of its connection portion on the closed body.

[0035] The valve plate of the valve according to the invention is not provided for, and is not constructed for, sealing between the valve housing components that also surround and define the valve chamber. Therefore, it is advantageous that the valve plate is spaced apart from the valve housing at least on the outer peripheral side, and particularly on all sides of the entire outer periphery, in the area of ​​the connecting clamp, and / or at least one annular seal, spaced apart and particularly independent of the valve plate, is provided between the valve housing components that surround and define the valve housing.

[0036] The solution to the task described at the beginning, according to the invention, is proposed in a diaphragm pump of the type described at the beginning: at least one inlet valve and / or outlet valve is constructed according to the invention. Attached Figure Description

[0037] Further extensions to the invention are derived from the following description. The invention will now be described in more detail with reference to preferred embodiments.

[0038] In the attached diagram:

[0039] Figure 1 A valve plate is shown, having a central and circular closing body in top view. The closing body has external edge retaining portions arranged on opposite sides. Each external edge retaining portion has a pair of webs spaced apart from each other. Each web is connected to the other at its web ends opposite to the closing body by connecting clamps. Each external edge retaining portion acts with tensile stress on the provided retaining base, so that the closing body is properly held on the valve seat.

[0040] Figure 2 Show Figure 1 The configuration here is a longitudinal section of the valve through the valve housing of the inlet valve of the diaphragm pump, wherein the valve plate of the valve is held in a valve chamber surrounding two valve housing components that are close to each other;

[0041] Figure 3 Show Figure 1 The configuration here is the longitudinal section of the outlet valve of the diaphragm pump passing through the valve housing, wherein the outlet valve is also held in a valve chamber surrounding two valve housing components that are in contact with each other, and the housing geometry for receiving the valve plate is provided in... Figure 2 and Figure 3 They are respectively arranged in the valve housing component below, which serves as the base;

[0042] Figure 4 This is shown during valve installation, and more precisely, before the valve housing components are engaged and abutting each other in the installed state. Figure 2 Inlet valve;

[0043] Figure 5 This is shown during valve installation, and more precisely, before the valve housing components are engaged and abutting each other in the installed state. Figure 3 The longitudinal section of the outlet valve;

[0044] Figure 6 As shown in Figure 1 A detailed view of the area between the outer edge retaining part and the central closing body of the valve plate in the middle structure;

[0045] Figure 7 As shown in Figure 1 A detailed view of the valve plate structure, which has a centering or positioning concave portion on the connecting clamp, which interacts with a convex portion on the corresponding retaining base.

[0046] Figure 8 Showing with Figure 1 A detailed view of the similar valve plate in the area of ​​its outer edge retaining portion, wherein a centering geometry formed by two cam-shaped convex portions is provided in the circumferential portion of the connecting clamp for resting on the retaining base, these convex portions being spaced apart from each other by the same cam-shaped concave portions.

[0047] Figure 9 Showing with Figure 1 A detailed view of the valve plate with a similar design in the area of ​​its outer edge retaining portion, where the connecting clamp has an arrowhead-shaped construction and a centering geometry generally arranged at the center of the connecting clamp; and

[0048] Figure 10 A valve plate is shown, having three external edge retaining portions that interact with retaining bases on the valve housing. These edge retaining portions are arranged at uniform distances on the circumference of the valve plate and act on a central closing body. Detailed Implementation

[0049] Figure 1 and Figure 10 Two embodiments of valve 100 are shown. This valve is constructed as a flat plate valve and can be used as an inlet or outlet valve for a diaphragm pump, or as a check valve for pressure control. Valve 100 has... Figure 2 and Figure 3 The valve chamber 14 is shown in detail, in which a valve seat 4 is provided. The valve seat 4 interacts with a valve plate 10, which is elastically pre-tightened by stretching through an outer edge retainer 101, such that the plate-shaped central closing body 1 is sealed against the valve seat 4 and is able—at least in the area of ​​its outer edge retainer 101—to overcome the elasticity of the material used for the valve plate 10 and move to the open position.

[0050] According to Figure 1 As can be seen in the top view, the outer edge retaining portion 101 can be provided on the valve plate 10 on opposite sides of the valve seat 4. Conversely, according to... Figure 10 The valve plate 10 has three external edge retaining portions 101, which are evenly distributed around the circumference of the closing body 1. The external edge retaining portions 101 act only on the closing body 1 in a manner that they are not connected to each other. Figure 1 and Figure 10 Each outer edge retaining portion 101 of the valve plate shown has at least two webs 2. The webs of each outer edge retaining portion 101 are connected to each other at their ends facing away from the web of the closing body 1 via connecting clamps 5. Each connecting clamp 5 engages from the rear at at least one disposed retaining base 7 of the valve housing. Figure 1As can be seen, each connecting clamp 5 engages from the rear at least one configured retaining base 7 of the valve housing, and each edge retaining portion 101 has a pair of webs 2, which are connected to each other at their ends opposite to the closing body 1 by a common connecting clamp 5.

[0051] The connecting clamps 5 of the outer edge retaining parts 101 are connected to the closing body 1 separately from each other via web plates 2 respectively provided thereto. Figure 1 As can be seen, each edge retaining portion 101 has a centering geometry that interacts with a preferred complementary mating geometry of at least one disposed retaining base 7. According to... Figure 1 In one embodiment, each edge retaining portion 101's connecting clamp 5 has at least one centered or positioned convex or concave portion that interacts with a complementary mating portion on the at least one disposed retaining base 7, wherein each edge retaining portion 101's connecting clamp 5 has a generally centrally arranged and preferably generally cam-shaped convex portion 3. By comparison Figure 7 , 8 As can be seen from the detailed diagram shown in Figure 9, each edge retaining portion 101 has a connecting clamp 5 having at least one centering or positioning convex or concave part 3, 103, which interacts with a complementary mating part on at least one disposed retaining base 7.

[0052] like Figure 7 As shown, the connecting clamp 5 of each edge retaining portion 101 may have at least one centering or positioning convex or concave portion that interacts with at least one complementary mating portion on the retaining base 7.

[0053] exist Figure 1 As can be seen, the webs 2 of the edge retaining portions 101 arranged on opposite sides of the valve plate 10 are arranged in pairs along a generally straight line, which preferably extends generally tangentially to the closing body 1. The connecting clamps 5 of each edge retaining portion 101, which connect the webs 2 to each other, abut against adjacent circumferential regions of the retaining base 7 provided for that edge retaining portion. At least one retaining base 7 is constructed, in particular, to be convexly curved or rounded, in the circumferential region where the connecting clamp 5 is applied. The connecting clamps 5 of each edge retaining portion 101, which connect the webs 2 to each other, abut against adjacent circumferential regions of the retaining base 7 provided for that edge retaining portion 101. At least one retaining base 7 is constructed, in particular, to be convexly curved or rounded, in the circumferential region where the connecting clamp 5 is applied.

[0054] from Figures 2 to 5 It is understood that valve chamber 14 is surrounded between valve housing components 8 and 15 that are in contact with each other, forming the valve housing. The valve housing can also be an integrated component of the pump head of a diaphragm pump.

[0055] The valve seat 4, which surrounds valve openings 12, 13 such as inlet or outlet channels, protrudes from the plane formed by the edge retaining portion 101 outside the valve plate 10. Connecting clamps 5 protrude laterally from their respective retaining bases 7, such that the web 2 connected to the connecting clamps 5 is pre-tightened outward by bending. Here, each connecting clamp 5 is designed such that the deformation of the edge retaining portion 101 on the edge side in the region of its connecting clamp 5 due to pre-tightening is greater than the deformation in the region of the web 2. Figure 1 As can be seen, the retaining portion 101 on the edge side is designed such that, compared to the closed position (line a), in the valve open position (line b), the extension of the distance between the convex portions arranged on opposite sides of the valve plate 10 is compensated by more than half by the additional bending of the connecting clamp 5. Here, each retaining base 7 has a height relative to the adjacent plane of the valve housing that is greater than the thickness of the valve plate 10. Figure 2 and Figure 3 It is known that the valve seat 4 protrudes from the adjacent plane of the valve body, and at least one lifting catcher 102 is provided on the side of the valve body away from the valve seat 4, which protrudes from the adjacent plane of the valve body and limits the maximum offset of the closing body 1 in the open position of the valve 100.

[0056] Since the valve plate 10 does not perform an additional function in sealing the separation surfaces between the valve housing components 8 and 15 that are in contact with each other, the valve plate 10 can be spaced apart from the valve housing at least on the outer circumferential side in the area of ​​the connecting clamp 5, and particularly on all sides of the entire outer circumference. At least one annular seal 11, spaced apart and surrounding the valve plate 10, and particularly independent of the valve plate 10, is provided between the valve housing components 8 and 15 that surround the valve housing.

[0057] The valve plate 10 of valve 100 is held on the outer edge retainer 101 on the edge side and is elastically pre-tightened. This valve (which can also be called a clamp valve due to its connecting clamp 5) is passively operated by differential pressure. Figure 1 As shown, two pairs of opposing webs 2 (which connect the valve plate 10 to the retaining base 7 with its outer edge retaining portion 101) are connected in pairs on the clamping side of the retaining base 7, and the web pairs of the edge retaining portion 101 are always under tensile stress due to the bending of the connecting clamp 5. A centering geometry is provided on the circumferential side of the retaining base 7 facing the connecting clamp 5, which has a corresponding negative shape on the side of the retaining base 7 adjacent to the connecting clamp 5, and positions the closing body 1 on the valve seat 4.

[0058] exist Figure 1 In the illustrated embodiment, the centering geometry provided on the connecting clamp 5 is formed by a cam-shaped protrusion 3 arranged approximately centrally. However, as... Figure 8As shown, the connecting clamp 5 may also have two such convex forming parts 3 on its inner side, which are connected to each other by a concave forming part 103 arranged therebetween and approximately in the center.

[0059] exist Figure 9 The convex part shown, which is located on the inner side of the connecting clamp 5 and is also roughly centered there, can also be constructed in the shape of an arrowhead. Figure 9 The arrowhead-shaped convex part 3 of the connecting clamp 5 shown engages with the corresponding negative shape on the retaining base, which is not shown further here.

[0060] By comparison Figure 2 and Figure 4 or Figure 3 and Figure 5 As can be seen, when installing valve 100, valve plate 10 is placed on one of the valve body components and here on the corresponding lower valve body component 15. Pre-tightening of the web 2 in the longitudinal direction Pfl and also in the plane of the valve seat 4 is achieved by assembling the valve body components 8 and 15, which are abutting each other in the installed state. The receiving geometry of the valve body components 8 and 15, which are abutting each other in the installed state, can be designed by the corresponding insertion ramp 6 to achieve pre-tightening of valve plate 10 when assembling these valve body components 8 and 15 manually or, if necessary, automatically, without additional installation steps. This also simplifies the automated installation of valve 100 without sacrificing the functionally important pre-tightening in the area of ​​the outer edge retaining portion 101.

[0061] As required, the receiving geometry for the valve plate 10 in the valve housing components 8 and 15 can be arranged on the lower valve housing component 15 or the upper valve housing component 8. However, for ease of installation, it is advantageous to provide a receiving geometry for the valve plate 10 in the lower valve housing component 15. Figure 2 and Figure 4 The inlet valve shown and used for Figure 3 and Figure 5 The receiving geometry of the outlet valve is shown.

[0062] Due to the centering geometry with the convex portion 3 provided on the connecting clamp 5, the valve plate 10 is well positioned on the valve seat 4 with its closing body 1. Even if the material used for the valve plate 10 expands slightly, this positioning and valve function will not be lost. The expansion will only reduce the elastic preload acting in the direction of arrow Pfl in the area of ​​the retaining portion 101 at the outer edge of the valve plate 10.

[0063] In order for the closing body 1 to seal against the valve seat 4 in the closed position of the valve 100, the valve seat 4 protrudes slightly beyond the plane of the retaining portion 101 on the edge side of the valve plate 10. The exact dimension of this protrusion is below the component tolerance. In the valve 100 according to the invention shown here, the closing function of the valve 100 depends less on the exact dimension of the protrusion of the valve seat 4 compared to other known valve types. This is achieved by connecting the valve plate 10 to the valve housing via at least two webs 2 of each edge retaining portion 101, which results in a lesser degree of bending of the valve plate 10.

[0064] Compared to other flat plate valves that are pre-tightened along their length, the valve 100 shown here can also be more easily automated. The connection of at least two webs 2 on the retaining portions 101 at the edge sides facilitates the gripping of the valve plate 10 by a clamp and, in particular, provides elastic pre-tightening. The automated installation of the valve 100 shown here can be further simplified by the component structure. That is, as... Figure 4 and Figure 5 As shown, the valve plate 10 is mounted on the housing component 15 located below, and the preload of the outer edge retaining portion 101 in the region of the web plate 2 or connecting clamp 5 along the longitudinal direction Pf1 and in the plane of the valve seat 4 is achieved by assembling and mounting the two valve housing components 8 along the installation direction Pf2. Here, the preload of the valve plate 10 in the region of the edge retaining portion 101 is achieved by the shaped bevel 6.

[0065] Compared to known valve designs (where an annular seal arranged on the outer circumferential side is also integrated into the valve plate 10), the clamp valve shown here requires less space. This results in a smaller damage space (dead zone) if the valve 100 is used, for example, as the inlet and / or outlet valve of a diaphragm pump not further shown here.

[0066] Through joint observation Figures 2 to 5 It can be seen that the valve housing component 15 located below is a valve housing component having a retaining base 7 for retaining the edge side of the valve plate 10. Figure 2 and Figure 3 In the diagram, dashed line c corresponds to the neutral line of valve 100 in the closed position, while line d corresponds to the neutral line of valve 100 in the open position. The web 2 of each edge retainer and the connecting clamp 10 are designed such that when the valve is open... Figure 1 The extension of line b shown relative to line a shown therein in the closed state is mostly, but at least more than half, compensated in the connecting clamp 5 by additional bending, and less compensated in the web by tensile elongation.

[0067] Figure 10 The valve plate 10, which is shown in other respects but not further shown, wherein, according to Figure 10The valve plate 10 has three external edge retaining portions 101, which are evenly spaced around its circumference. Each edge retaining portion has a connecting clamp 5, which is connected to a closing body 1, which is also circular in structure, at the center of the valve plate 10, via a pair of web plates 2. Figure 1 As shown, each edge retaining portion formed by a pair of webs 2 and a connecting clamp 5 engages from the rear with a corresponding retaining base 7 on the valve housing.

[0068] List of reference numerals

[0069] 1 Closed body

[0070] 2. Web

[0071] 3. (On the connecting clamp) convex part

[0072] 4 valve seats

[0073] 5 connecting clamps

[0074] 6 forming bevel

[0075] 7. Maintain the base

[0076] Valve housing component above 8

[0077] 9. Connection area between web 2 and closing body 1

[0078] 10 valve plate

[0079] 11 Annular Seal

[0080] 12 entrance openings

[0081] 13 Exit Openings

[0082] 14 valve chambers

[0083] Valve housing component below 15

[0084] 100 valve

[0085] 101 External edge retaining part

[0086] 102 Lifting Grabber

[0087] 103 Concave Forming Part

[0088] Pf1 Preload / Tension Force Direction

[0089] Direction of force Pf2 during assembly of valve housing components 8 and 15

[0090] a is the distance between the protruding portions 3 arranged on opposite sides of the valve 100 in the closed state.

[0091] b is the distance between the protruding portions 3 arranged on opposite sides of the valve plate 10 in the open position of the valve 100.

[0092] c is the neutral line of the valve in the closed position.

[0093] d Neutral line of the valve in the open position

Claims

1. A valve (100) for a diaphragm pump, the valve having a valve chamber (14) defined by a valve housing, wherein at least one valve seat (4) is provided in the valve chamber, the valve seat interacting with a valve plate (10), the valve plate being elastically pre-tightened by stretching via an external edge retainer (101), such that a closing body (1) of the valve plate (10) can move from a closed position to an open position overcoming the elasticity of the valve plate (10) at least in the area of ​​its external edge retainer (101), in which the closing body (1) sealably rests against the valve seat (4), wherein, The outer edge retaining portion (101) of the valve plate (10) has a web (2) and a connecting clamp (5) connected to the web end of the web (2) away from the closing body (1). The outer edge retaining portion (101) acts only on the closing body (1) in a manner that is not connected to each other. Each outer edge retaining portion (101) has at least two webs (2). The webs (2) of each outer edge retaining portion (101) are connected to each other via the connecting clamp (5). Each connecting clamp (5) engages from the rear at least one disposed retaining base (7) of the valve housing, and the connecting clamp (5) laterally protrudes from its disposed retaining base (7) on both sides, such that the connecting clamp (5) is pre-tightened outward by bending.

2. The valve according to claim 1, characterized in that, The connecting clamps (5) are connected to the closing body (1) separately from each other by the webs (2) correspondingly provided thereto.

3. The valve according to claim 1 or 2, characterized in that, Each edge retaining portion (101) has a centering geometry that interacts with the mating geometry of the at least one configured retaining base (7).

4. The valve according to claim 1 or 2, characterized in that, Each edge retainer (101) has a pair of webs (2) which are connected to each other at their ends opposite to the closing body (1) by a common connecting clamp (5).

5. The valve according to claim 1 or 2, characterized in that, Each edge retaining portion (101) has a connecting clamp (5) having at least one centering or positioning convex or concave portion (3; 103) that interacts with a complementary mating portion on the at least one disposed retaining base (7).

6. The valve according to claim 1 or 2, characterized in that, Each edge retaining part (101) has a connecting clamp (5) with a generally centrally located convex part (3).

7. The valve according to claim 1 or 2, characterized in that, The web (2) of the outer edge retaining part (101) is disposed on the valve plate (10) on opposite sides of the valve seat (4).

8. The valve according to claim 1 or 2, characterized in that, The web plates (2) of the edge retaining portions (101) arranged on opposite sides of the valve plate (10) are arranged in pairs on a generally straight line.

9. The valve according to claim 1 or 2, characterized in that, At least one retaining base (7) is constructed in its circumferential region loaded by the provided connecting clamp (5).

10. The valve according to claim 1 or 2, characterized in that, The valve chamber (14) in the valve housing is surrounded and defined between the valve housing components (8, 15) that are close to each other.

11. The valve according to claim 10, characterized in that, The valve housing components (8, 15) that are close to each other are arranged to receive the valve plate (10) and the receiving geometry has an insertion ramp (6) that, when the housing components (8, 15) are inserted into each other, places the valve plate (10) between the valve housing components (8, 15) in a pre-tightened use position on the edge retaining portion (101) of the valve plate.

12. The valve according to claim 1 or 2, characterized in that, The valve seat (4) protrudes from the plane formed by the edge retaining portion (101) of the valve plate (10).

13. The valve according to claim 1 or 2, characterized in that, Each connecting clamp (5) is designed such that the deformation of the edge retainer (101) in the region of its connecting clamp (5) due to pre-tightening is greater than the deformation in the region of the web (2).

14. The valve according to claim 1 or 2, characterized in that, The edge retaining part (101) is designed such that, in the open position of the valve (100) compared to the closed position, the extension of the distance between the convex parts (3) arranged on opposite sides of the valve plate (10) is compensated by more than half by the additional bending of the connecting clamp (5).

15. The valve according to claim 1 or 2, characterized in that, Each retaining base (7) has a height greater than the thickness of the valve plate (10) relative to the adjacent plane of the valve body.

16. The valve according to claim 1 or 2, characterized in that, The valve plate (10) is pre-tightly held between the retaining bases arranged on both sides of the valve seat (4), so that even when the material used for the valve plate (10) expands, tensile stress is applied to the web plate (2) of the edge retaining part (101).

17. The valve according to claim 1 or 2, characterized in that, The valve seat (4) protrudes from the adjacent plane of the valve body.

18. The valve according to claim 1 or 2, characterized in that, At least one lift catcher (102) is provided on the side of the valve housing away from the valve seat (4). The lift catcher (102) protrudes from the adjacent plane of the valve housing and limits the maximum offset of the closing body (1) in the open position of the valve (100).

19. The valve according to claim 1 or 2, characterized in that, The web (2) has a constant cross-section in the region between the connecting clamp (5) on one side and its connection on the closing body (1) on the other side, or the web has a cross-section reduction or narrowing in the region of its connection to the closing body (1).

20. The valve according to claim 1 or 2, characterized in that, The valve plate (10) is spaced apart from the valve housing on the outer peripheral side at least in the area where the connecting clamp (5) is located.

21. The valve according to claim 1 or 2, characterized in that, At least one annular seal (11) is provided between the valve housing components (8, 15) that surround the valve plate (10) at a distance from each other.

22. The valve according to claim 1, characterized in that, The valve (100) is a flat plate valve or a check valve.

23. The valve according to claim 3, characterized in that, The centering geometry interacts with the complementary mating geometry of the at least one configured retaining base (7).

24. The valve according to claim 6, characterized in that, The convex part (3) has a cam-shaped structure.

25. The valve according to claim 8, characterized in that, The line extends roughly tangentially to the closed body (1).

26. The valve according to claim 9, characterized in that, At least one retaining base (7) is constructed to be convexly curved or rounded in the circumferential region loaded by the provided connecting clamp (5).

27. The valve according to claim 20, characterized in that, The valve plate (10) is spaced apart from the valve housing at least on the outer periphery in the area where the clamp (5) is connected, and on all sides of the entire outer periphery.

28. The valve according to claim 21, characterized in that, At least one annular seal (11) is provided between the valve housing components (8, 15) that surround the valve plate (10) at a distance from each other and is independent of the valve plate (10).

29. A diaphragm pump, having at least one inlet valve and at least one outlet valve, characterized in that, At least one inlet valve and / or outlet valve, a valve construction according to any one of claims 1 to 28.

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