Valve diaphragm and diaphragm valve comprising spring element

Abstract

The invention relates to a valve diaphragm (12) for a diaphragm valve (10), the valve diaphragm (12) comprising: a diaphragm layer (14, 16) having a clamping section (18) and a functional section (20) surrounded by the clamping section (18), the functional section (20) being displaceable along an actuation axis (24); and at least one elastic force transmission element (32), which is arranged on or in the clamping section (18) and is formed separately from the diaphragm layer (14, 16), for clamping the valve diaphragm (12) to a valve body (28) of the diaphragm valve (10).

Description

Technical Field

[0001] This invention relates to a valve diaphragm and a diaphragm valve. Background Technology

[0002] According to US10047863B1, a diaphragm with an embedded flat helical spring is known, wherein the spring extends over the entire plane of the diaphragm. Summary of the Invention

[0003] The present invention is based on the purpose of providing a valve diaphragm for a diaphragm valve, the valve diaphragm ensuring that the valve diaphragm is fixed in the diaphragm valve.

[0004] The objective of this invention is achieved by a valve diaphragm having the features described below in this paragraph. This invention proposes a valve diaphragm for a diaphragm valve, the valve diaphragm comprising: a wet-side diaphragm layer having a clamping section and a functional section surrounded by the clamping section, wherein the functional section is displaceable along an actuation axis; and at least one elastic force transmission element disposed on or in the clamping section and formed separately from the diaphragm layer for clamping the valve diaphragm against the valve body of the diaphragm valve.

[0005] By incorporating a force transmission element and designing it separately from the clamping section, the valve diaphragm can be clamped in a particularly targeted and suitable manner on the valve body of the diaphragm valve. This allows the characteristics of the force transmission element, the clamping section, and the functional section to be specifically adjusted according to the requirements of the diaphragm valve.

[0006] The spring stiffness of the force transmission element is preferably greater than the spring stiffness of the diaphragm layer. The elastic modulus of the force transmission element is preferably greater than the elastic modulus of the diaphragm layer.

[0007] The spring stiffness ratio between the elastic force transmission element and the diaphragm layer is preferably in the range of 100,000:1 to 1.1:1, particularly in the range of 10,000:1 to 1.5:1, and preferably in the range of 1,000:1 to 2:1. The elastic modulus ratio between the elastic force transmission element and the diaphragm layer is preferably in the range of 500:1 to 1.1:1, particularly in the range of 200:1 to 1.5:1, and preferably in the range of 50:1 to 2:1.

[0008] Advantageously, the at least one force transmission element applies a preload to the valve diaphragm parallel to the actuation axis or applies a spring force to the valve diaphragm parallel to the actuation axis. Therefore, the valve diaphragm, particularly the clamping section, is fixed against the valve body of the diaphragm valve.

[0009] Furthermore, the spring seat and the at least one force transmission element are designed to be complementary to each other, particularly at least partially complementary.

[0010] An advantageous aspect of the invention specifies that the at least one force-transmitting element is designed as a wave spring, a ring spring, or an elastomer element. Therefore, a particularly simple force-transmitting element can be provided.

[0011] An advantageous aspect of the invention specifies that the at least one force-transmitting element is designed to be annular and / or arranged along an imaginary first circle surrounding the actuation axis. This ensures uniform clamping of the clamping segment along the circumference. Preferably, the main extension direction of the force-transmitting element extends perpendicular to the actuation axis.

[0012] An advantageous aspect of the invention provides that the diaphragm layer has a spring seat in the clamping section. This ensures precise and repeatable positioning of the force transmission element.

[0013] An advantageous aspect of the invention specifies that the spring seat is designed to be annular and / or arranged along an imaginary second circle surrounding the actuation axis. Therefore, uniform clamping along the circumference is also ensured in this case. Preferably, the first circle and the second circle are identical. The first circle and / or the second circle are preferably arranged perpendicular to the actuation axis.

[0014] An advantageous aspect of the invention is that the spring seat is accessible parallel to the actuation axis. This ensures particularly easy access and installation. Furthermore, it makes the force-transmitting element replaceable.

[0015] An advantageous aspect of the invention specifies that the spring seat is accessible perpendicular to the actuation axis, particularly radially from the outside relative to the actuation axis. This ensures particularly easy access and installation. Furthermore, this makes the force-transmitting element replaceable. The spring seat can also be accessible parallel to and perpendicular to the actuation axis.

[0016] Advantageously, the force transmission element is preloaded toward the actuation axis. The inner diameter of the force transmission element is smaller than the outer diameter of the spring seat. Therefore, the force transmission element is immovably fixed to the clamping section, and in particular, there are no additional fastening devices.

[0017] The spring seat may be L-shaped, can-shaped, or U-shaped. The force transmission element and the spring seat are designed to correspond at least partially to each other.

[0018] An advantageous aspect of the invention provides that the at least one force-transmitting element is supported against the dry side of the diaphragm layer.

[0019] An advantageous aspect of the invention provides that the valve diaphragm, particularly in the clamping section, has a dry-side diaphragm layer, wherein the at least one force-transmitting element is supported against the contact side of the dry-side diaphragm layer, the contact side facing the dry side of the wet-side diaphragm layer. The force-transmitting element is preferably arranged between the wet-side diaphragm layer and the dry-side diaphragm layer.

[0020] An advantageous aspect of the invention provides that a plurality of force transmission elements are arranged parallel to the actuation axis. Preferably, the main extension direction of the force transmission elements extends parallel to the actuation axis.

[0021] An advantageous aspect of the invention specifies that at least one force transmission element is made of spring steel, chrome vanadium steel, chrome silicon steel, nickel alloy, polyetheretherketone, nylon, or polyurethane. Therefore, the force transmission element is specifically designed to meet its requirements in the region of the clamping section, particularly low compressive deformation and / or high durability.

[0022] An advantageous aspect of the invention specifies that the elastic modulus of the valve body-side clamping surface of the clamping section of the at least one force-transmitting element perpendicular to the diaphragm layer and / or parallel to the actuation axis is at least two times, particularly at least five times, particularly at least ten times, and particularly at least twenty times, the elastic modulus of the principal material of the at least one clamping section of the diaphragm layer. This ensures a secure clamping.

[0023] The object of the present invention is also achieved by a diaphragm valve having the features described below in this paragraph. The present invention proposes a diaphragm valve having a valve body, an actuating body, and a valve diaphragm according to the present invention, wherein the at least one force-transmitting element of the valve diaphragm is arranged between the valve body and the actuating body for clamping the valve diaphragm against the valve body.

[0024] Other advantages, features, and details emerge from the following description, in which several exemplary embodiments of the invention are illustrated with reference to the accompanying drawings. The features mentioned in the claims and the specification may be essential to the invention individually or in any desired combination in each case. Attached Figure Description

[0025] Figure 1 →Cross-sectional view of the diaphragm valve; Figure 2 → Used according to Figure 1 A top view of the valve diaphragm of a diaphragm valve; Figure 3 → Used according to Figure 2 A top view of the diaphragm of another diaphragm valve; and Figures 4A-4E →Cross-sectional view of an embodiment of the spring seat and force transmission element. Detailed Implementation

[0026] according to Figure 1 The diaphragm valve 10 has a valve diaphragm 12 having a wet-side diaphragm layer 14 and a dry-side diaphragm layer 16. The valve diaphragm 12 includes a clamping section 18 and a functional section 20 surrounded by the clamping section 18. The functional section 20 can be moved along the actuation axis 24 between an open position away from the through line 22 and a closed position facing the through line 22 by means of an actuator 25 and an actuator rod 26 to open and close the through line 22 of the diaphragm valve 10.

[0027] The valve diaphragm 12 is clamped and fixed between the valve body 28 and the actuator housing 30 of the diaphragm valve 10, or between intermediate housings. The fixing of the valve diaphragm 12 in the region of the clamping section 18 serves to seal the through-line 22 toward the actuator housing 30. Due to the settling of the diaphragm material and the resulting reduction in the clamping force of the valve diaphragm 12, at least one force transmission element 32 is additionally arranged in the spring seat 34 of the valve diaphragm 12.

[0028] To ensure a seal in the region of the clamping section 18, the first wet side 36 can withstand the spring force resisting the valve body 28. For this purpose, at least one force-transmitting element 32 and a spring seat 34 can be arranged on the first dry side 38 of the wet-side diaphragm layer 14, and / or between the wet-side diaphragm layer 14 and the dry-side diaphragm layer 16, and / or on the second wet side 40 of the dry-side diaphragm layer 16, and / or on the second dry side 42 of the dry-side diaphragm layer 16. Alternatively, it is conceivable that the wet-side diaphragm layer 14 and / or the dry-side diaphragm layer 16 are formed as a plurality of layers at least in the region of at least one force-transmitting element 32, wherein at least one force-transmitting element 32 is arranged between said plurality of layers of the wet-side diaphragm layer 14 and / or the dry-side diaphragm layer 16.

[0029] according to Figure 1 The dry-side diaphragm layer 16 has a force transmission element 32. For this purpose, the dry-side diaphragm layer 16 includes a spring seat 34 that is parallel to the actuation axis 24 and radially accessible from the outside relative to the actuation axis 24. The force transmission element 32 is supported on one side against the actuator housing 30 and on the other side against the dry-side diaphragm layer 16, such that the wet-side diaphragm layer 14 is pressed against the valve body 28.

[0030] according to Figure 2 Ten force transmission elements 32 are arranged on or within the valve diaphragm 12 along an imaginary circle surrounding the actuation axis 24, particularly in the wet-side diaphragm layer 14 and / or the dry-side diaphragm layer 16. The main extension direction of the force transmission elements 32 preferably extends parallel to the actuation axis 24. Therefore, the force transmission elements 32 apply a spring force parallel to their main extension direction.

[0031] To accommodate the force transmission element 32, the valve diaphragm 12 has an annular spring seat 34, which also extends along the imaginary circle. Figure 2 The spring seat 34 can preferably be designed as a canister shape having a base, an inner side, and an outer side, and restricting the force transmission element 32 downward, radially outward, and radially inward. The spring seat 34 is preferably accessible from the first dry side 38 or the second dry side 42 parallel to the actuation axis 24. The corresponding design of the spring seat 34 is as follows: Figure 4E The diagram shows the first dry side 38 of the wet-side diaphragm layer 14. For each force-transmitting element 32, a separate spring seat 34 may also be preferably provided.

[0032] according to Figure 3 A cohesive force transmission element 32 is provided, which extends along the imaginary circle in its main extension direction. Therefore, the force transmission element 32 applies a spring force perpendicular to its main extension direction. The spring seat 34 can be designed as follows: Figure 2 As shown in the figure.

[0033] Figures 4A-4E Different embodiments of the force transmission element 32 and spring seat 34 of the valve diaphragm 12 are shown. The diaphragm layers shown can represent a wet-side diaphragm layer 14 and a dry-side diaphragm layer 16. To simplify... Figures 4A-4C The description below refers only to the wet-side diaphragm layer 14, although this can also be applied to the dry-side diaphragm layer.

[0034] according to Figure 4A The wet-side diaphragm layer 14 is formed as multiple layers, at least in the region of the clamping section 18. Therefore, the wet-side diaphragm layer 14 in the region of the clamping section 18 includes: a primary layer 44, which specifically faces the through-line 22; and a secondary layer 46, which specifically faces away from the through-line 22. The wet-side diaphragm layer 14 has a spring seat 34, which is radially accessible from the outside relative to the actuation axis 24. The spring seat 34 is preferably located radially outward of the valve diaphragm 12 relative to the actuation axis 24. The spring seat 34 is preferably designed in a can shape, wherein, with Figure 2 and 3 In contrast, it is rotated outward by 90°; the main layer 44 and the secondary layer 46 form the inner and outer sides of the spring seat 34. The force transmission element 32 is designed here as, for example, a compression spring extending parallel to the actuation axis 24. Alternatively, it is conceivable to use multiple elastomeric elements or a wave spring or a ring spring. Thus, it can be seen that the spring seat 34 is designed to accommodate different force transmission elements 32. Accessibility also allows for easy replacement of the force transmission element 32.

[0035] according to Figure 4BThe wet-side diaphragm layer 14 has a recess serving as a spring seat 34, the recess having a semi-circular cross-section. Alternatively, the recess may also be designed to be elliptical. The spring seat 34 is preferably also arranged in the clamping section 18. The spring seat 34 is preferably designed to be continuous along the circumference of the valve diaphragm 12, and preferably extends along the imaginary circle. Preferably, a single force-transmitting element 32 is provided, wherein the force-transmitting element also extends along the imaginary circle corresponding to the spring seat 34 and is continuously formed along the circumference of the valve diaphragm 12. Here, the spring seat 34 may also be arranged in the outer region, the inner region, or the middle region of the clamping section 18. Since the spring seat 34 is accessible parallel to the actuation axis 24, particularly from the first wet side 36 of the diaphragm layer, the force-transmitting element 32 can be mounted on the wet-side diaphragm layer 14 by engaging movement parallel to the actuation axis 24.

[0036] according to Figure 4C The wet-side diaphragm layer 14 has an L-shaped spring seat 34. The spring seat 34 is preferably parallel to the actuation axis 24 and is radially accessible from the inside relative to the actuation axis 24. Figure 1 In contrast, the L-shaped spring seat 34 is a mirror image here. An annular elastomeric element can be used as the force transmission element 32. The force transmission element 32 and the spring seat 34 are preferably designed such that the outer side of the force transmission element 32 abuts against the inner side of the spring seat 34. They can be further designed to have dimensions such that the force transmission element 32 preloads the valve diaphragm 12 radially outward.

[0037] according to Figure 4D The wet-side diaphragm layer 14 and the dry-side diaphragm layer 16 each have two opposing, particularly can-shaped, spring seats 34. The spring seats 34 are preferably located on the first dry side 38 of the wet-side diaphragm layer 14 and on the second wet side 40 of the dry-side diaphragm layer 16. Thus, in the installed state, the force-transmitting element 32 is engaged in both diaphragm layers. Here, annular elastomeric elements, particularly single annular elastomeric elements, can also be used. Alternatively, wave springs or ring springs are also conceivable.

[0038] according to Figure 4E Valve diaphragm 12 and Figure 4D The difference in the valve diaphragm 12 is that it is provided with only a single spring seat 34. This can be arranged on the first dry side 38 of the wet-side diaphragm layer 14, as shown in the example. Figure 4E As shown, it is either disposed on the second wet side 40 of the dry-side diaphragm layer 16, or disposed on the second dry side 42 of the dry-side diaphragm layer 16. According to Figure 4EThe force transmission element 32, in its installed state, contacts the flat second wet side 40 of the dry-side diaphragm layer 16. Here, annular elastomeric elements, particularly single annular elastomeric elements, can also be used. Alternatively, wave springs or ring springs are also conceivable.

[0039] It should be noted that, for the sake of simplification, the size proportions of the diaphragm layers 14, 16, force transmission element 32, spring seat 34, and gap may be depicted with distortion.

[0040] List of reference numerals in the attached figures 10 Diaphragm valve 12 Valve Diaphragm 14 Wet-side diaphragm layer 16 Dry-side diaphragm layer 18 Clamping Section 20 Functional Sections 22 Through-line pipeline 24 Actuation axis 25 drives 26 drive levers 28 Valve body 30 Driver Housing 32 Force Transmission Elements 34 Spring seat 36. First wet side of the wet side diaphragm layer 38. First dry side of wet-side diaphragm layer 40. The second wet side of the dry-side diaphragm layer 42. The second dry side of the dry side diaphragm layer 44 Main Layer 46 secondary layers

Claims

1. A valve diaphragm (12) for a diaphragm valve (10), said valve diaphragm (12) comprising: - A diaphragm layer (14, 16) having a clamping section (18) and a functional section (20) surrounded by the clamping section (18), wherein the functional section (20) is displaceable along an actuation axis (24); and - At least one elastic force transmission element (32) is arranged on or in the clamping section (18) and is formed separately from the diaphragm layer (14, 16) for clamping the valve diaphragm (12) on the valve body (28) of the diaphragm valve (10).

2. The valve diaphragm (12) according to claim 1, wherein, The spring stiffness of the force transmission element (32) is greater than the spring stiffness of the diaphragm layer (14, 16), and / or the elastic modulus of the force transmission element (32) is greater than the elastic modulus of the diaphragm layer (14, 16).

3. The valve diaphragm (12) according to claim 1 or 2, wherein, The spring stiffness ratio between the force transmission element (32) and the diaphragm layers (14, 16) is in the range of 100000:1 to 1.1:1, particularly in the range of 10000:1 to 1.5:1, preferably in the range of 1000:1 to 2:1, and / or wherein the elastic modulus ratio between the force transmission element (32) and the diaphragm layers (14, 16) is in the range of 500:1 to 1.1:1, particularly in the range of 200:1 to 1.5:1, preferably in the range of 50:1 to 2:

1.

4. The valve diaphragm (12) according to claim 1, 2 or 3, wherein, The force transmission element (32) is arranged on the wet-side diaphragm layer (14) and / or the dry-side diaphragm layer (16).

5. The valve diaphragm (12) according to any one of the preceding claims, wherein, The at least one force transmission element (32) is designed as a wave spring, a ring spring, a compression spring, or an elastomer element.

6. The valve diaphragm (12) according to any one of the preceding claims, wherein, The at least one force transmission element (32) is designed to be annular and / or arranged along an imaginary first circle arranged around the actuation axis (24).

7. The valve diaphragm (12) according to any one of the preceding claims, wherein, The diaphragm layers (14, 16) have spring seats (34) in the clamping section (18).

8. The valve diaphragm (12) according to the preceding claim, wherein, The spring seat (34) is designed to be annular and / or arranged along an imaginary second circle arranged around the actuation axis (24).

9. The valve diaphragm (12) according to the preceding claim, wherein, The spring seat (34) is accessible parallel to the actuation axis (24).

10. The valve diaphragm (12) according to claim 9, wherein, The spring seat (34) is accessible perpendicular to the actuation axis (24), and in particular, is accessible radially from the outside relative to the actuation axis (24).

11. The valve diaphragm (12) according to any one of claims 7 to 10, wherein, The spring seat (34) is designed to be L-shaped, can-shaped, or U-shaped.

12. The valve diaphragm (12) according to any one of the preceding claims, wherein, The at least one force transmission element (32) is supported against the dry side (38, 42) of the diaphragm layer (14, 16).

13. The valve diaphragm (12) according to any one of the preceding claims, wherein, The valve diaphragm (12), particularly in the clamping section (18), has a dry-side diaphragm layer (16), wherein at least one force transmission element (32) is supported against the second wet side (40) of the dry-side diaphragm layer (16), the second wet side (40) facing the first dry side (38) of the wet-side diaphragm layer (14).

14. The valve diaphragm (12) according to any one of the preceding claims, wherein, Multiple force transmission elements (32) are arranged parallel to the actuation axis (24).

15. The valve diaphragm (12) according to any one of the preceding claims, wherein, The at least one force transmission element (32) is made of spring steel, chrome vanadium steel, chrome silicon steel, nickel alloy, polyether ether ketone, nylon or polyurethane.

16. The valve diaphragm (12) according to any one of the preceding claims, wherein, The elastic modulus of the valve body side clamping surface of the clamping section (18) of the at least one force transmission element (32) perpendicular to the diaphragm layer (14, 16) is at least twice, particularly at least five times, particularly at least ten times, particularly at least twenty times, the elastic modulus of the main material of the at least one clamping section (18) of the diaphragm layer (14, 16).

17. A diaphragm valve (10) comprising a valve body (28), an actuator housing (30), and a valve diaphragm (12) according to any one of the preceding claims, wherein, At least one force transmission element (32) of the valve diaphragm (12) is arranged between the valve body (28) and the actuator housing (30) for clamping the valve diaphragm (12) against the valve body (28).

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