An instrument and a novel pressure sensing diaphragm thereof

Abstract

The application discloses an instrument and a novel pressure sensing diaphragm thereof, wherein the novel pressure sensing diaphragm comprises a diaphragm base, and a plurality of small corrugations are arranged on each corrugation of the diaphragm base. In the scheme, the limitation of the traditional diaphragm is broken, a plurality of small corrugations are additionally arranged on the basis of each corrugation of the original diaphragm, the intersection line of the cross section of the diameter and the diaphragm is longer than that of the traditional diaphragm, the potential of the diaphragm material extension is increased, the deformation of the large corrugation and the small corrugation is superimposed, the sensitivity of the diaphragm is improved, the linearity can be maintained in a relatively large range, and therefore the accuracy of the instrument in the high range measurement is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of instruments and meters, in particular to an instrument and meter and a novel pressure-sensitive diaphragm thereof. BACKGROUND

[0002] As a pressure transmission medium, the diaphragm can be used in pressure meters with flange or threaded connection. The diaphragm is welded to the lower part of the meter or sealed by compression, and the inside is filled with inert pressure conducting liquid. The outside of the diaphragm is in contact with the measured medium, and the diaphragm can be deformed. The pressure of the medium is transmitted to the inert pressure conducting liquid inside the meter through the diaphragm.

[0003] The diaphragm is usually made of a thin metal sheet. The sensitivity of the diaphragm in transmitting pressure is related to the diameter, wave shape and thickness of the diaphragm. Under the same conditions, the larger the diameter, the more the wave shape and the smaller the thickness, the higher the sensitivity of the diaphragm in transmitting pressure. However, due to the size and welding performance of the meter, the size and thickness are limited, and the sensitivity of the diaphragm can only be improved by changing the wave shape of the diaphragm. Figure 1 and Figure 2 As shown in the drawings, the traditional diaphragm is usually in the form of a circular arc wave (circular arc corrugation) or a sawtooth wave (triangular corrugation). When the diaphragm is subjected to a small pressure P, the displacement of the center point upward is S1.

[0004] However, the traditional diaphragm based on the existing corrugation form still has the problem of low sensitivity. SUMMARY

[0005] Therefore, the present application provides a novel pressure-sensitive diaphragm, which breaks through the limitations of traditional diaphragms. On the basis of each corrugation of the original diaphragm, a plurality of small corrugations are additionally provided. The intersection line of the cross section of the diameter and the diaphragm is longer than that of the traditional diaphragm. The potential of the diaphragm material extension is increased. The deformation amount of the large corrugation and the small corrugation is superimposed, which improves the sensitivity of the diaphragm and enables the diaphragm to maintain linearity in a larger range, thereby ensuring the accuracy of the measurement of the instrument and meter in a high range.

[0006] To achieve the above object, the present application provides the following technical scheme:

[0007] A novel pressure-sensitive diaphragm comprises a diaphragm base, and each corrugation of the diaphragm base is provided with a plurality of small corrugations.

[0008] Preferably, each corrugation of the diaphragm base is sequentially provided with a plurality of small corrugations between the wave crest and the wave trough.

[0009] Preferably, the diaphragm base comprises a triangular corrugation diaphragm base.

[0010] The two groups of small corrugations are symmetrically distributed with respect to the peak of the triangular corrugation.

[0011] Preferably, the number of small corrugations in each group is one or more, and the number of small corrugations in each group is equal.

[0012] Preferably, in the two groups of small corrugations, the peaks of the small corrugations in one group are distributed in a one-to-one correspondence with the peaks of the small corrugations in the other group.

[0013] Preferably, the wave shape of the small corrugations includes, but is not limited to, a small circular arc corrugation, a small triangular corrugation, a small trapezoidal corrugation, or a small sinusoidal corrugation.

[0014] Preferably, the diaphragm base includes a triangular corrugated diaphragm base, and each triangular corrugation of the triangular corrugated diaphragm base is provided with a plurality of small triangular corrugations.

[0015] Preferably, the diaphragm base includes a circular arc corrugated diaphragm base, and each circular arc corrugation of the circular arc corrugated diaphragm base is provided with a plurality of small circular arc corrugations.

[0016] Preferably, each corrugation of the diaphragm base is provided with a plurality of small circular arc corrugations, small triangular corrugations, small trapezoidal corrugations, and / or small sinusoidal corrugations.

[0017] An instrument includes a diaphragm, which is a novel pressure sensing diaphragm as described above.

[0018] As can be seen from the above technical solutions, the novel pressure sensing diaphragm provided by the application breaks through the limitations of traditional diaphragms, and further provides a plurality of small corrugations on the basis of each corrugation of the original diaphragm, so that the intersection line of the cross section of the diameter and the diaphragm is longer than that of the traditional diaphragm, the potential of the diaphragm material extension is increased, the deformation amount of the large corrugation and the small corrugation is superimposed, the sensitivity of the diaphragm is improved, and the diaphragm can maintain linearity in a relatively large range, thereby ensuring the accuracy of the instrument in measuring in a high range.

[0019] The application also provides an instrument, which has corresponding beneficial effects due to the use of the novel pressure sensing diaphragm described above, and specific reference can be made to the foregoing description, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only represent some embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without any creative effort based on these drawings also belong to the protection scope of the present application.

[0021] Figure 1 It is a schematic diagram of the prior triangular corrugated diaphragm before and after being pressurized.

[0022] Figure 2 It is a schematic diagram of the prior circular arc corrugated diaphragm before and after being pressurized.

[0023] Figure 3 It is a schematic diagram of the superimposed triangular corrugated diaphragm before being pressurized according to the embodiment of the present application.

[0024] Figure 4 It is a schematic diagram of the superimposed triangular corrugated diaphragm after being pressurized according to the embodiment of the present application.

[0025] Figure 5 It is a schematic diagram of the superimposed triangular corrugated diaphragm before and after being pressurized according to the embodiment of the present application.

[0026] Figure 6 It is a schematic diagram of the superimposed circular arc corrugated diaphragm before being pressurized according to the embodiment of the present application.

[0027] Figure 7 It is a schematic diagram of the superimposed circular arc corrugated diaphragm after being pressurized according to the embodiment of the present application.

[0028] Figure 8 It is a schematic diagram of the superimposed circular arc corrugated diaphragm before and after being pressurized according to the embodiment of the present application.

[0029] Wherein, 100 is a triangular corrugated diaphragm base body, 110 is a triangular corrugation, and 111 is a small triangular corrugation; 200 is a circular arc corrugated diaphragm base body, 210 is a circular arc corrugation, and 211 is a small circular arc corrugation. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments only represent some embodiments of the present application, and all other embodiments obtained by those of ordinary skill in the art without any creative effort based on these embodiments also belong to the protection scope of the present application.

[0031] The novel pressure sensing diaphragm provided by the embodiments of the present application comprises a diaphragm base body, such as Figure 3 and Figure 6As shown, each corrugation of the diaphragm base is provided with a plurality of small corrugations.

[0032] It should be noted that the diaphragm base of the present scheme is a circular diaphragm base, as shown in Figure 3 and Figure 6 The small corrugations are distributed along the large corrugation slope of the base, that is, the small corrugations and the large corrugations are both distributed around the center of the circular diaphragm base. In addition, the present scheme breaks through the limitations of traditional diaphragms. On the basis of each corrugation of the original diaphragm (including the original circular arc corrugated diaphragm or the original triangular corrugated diaphragm), a plurality of small corrugations are additionally provided, so that the intersection line of the cross section of the diaphragm passing through the diameter is longer than that of the traditional diaphragm, the potential of the diaphragm material extension is increased, the deformation amount of the large corrugation and the small corrugation is superimposed, the sensitivity of the diaphragm is improved, and the diaphragm can maintain linearity in a larger range, thereby ensuring the accuracy of the instrument in measuring in a high range.

[0033] That is, the novel pressure sensing diaphragm provided by the present scheme can increase the sensitivity and range of the diaphragm, so that its application range is wider, and can be used as a pressure sensing (or pressure transmitting) diaphragm design for pressure instruments such as diaphragm pressure gauges, diaphragm pressure gauges, bellows pressure gauges, pressure sensors, and remote pressure transmitters. In addition to performance improvement, the outer diameter of the diaphragm can be reduced under the same performance, so that the instrument has a smaller size, saves instrument cost, or is used for special instruments with strict space requirements.

[0034] In addition, the novel pressure sensing diaphragm provided by the present scheme can be formed by a male and female mold forming method. Specifically, the blank and the female mold are placed in the recess hole of the pressure ring, and when the female mold moves downward with respect to the male mold and the pressure ring, the profile portions of the female mold and the male mold are embedded in each other to press the corrugations on the blank. The thickness of the gasket between the pressure ring and the male mold can be changed to adjust the height of the formed corrugations of the diaphragm.

[0035] In the present scheme, in order to make the diaphragm have a larger extension potential, so as to further improve the sensitivity of the diaphragm, as shown in Figure 3 and Figure 6 Each corrugation of the diaphragm base is sequentially provided with a plurality of small corrugations between the wave crest and the wave trough.

[0036] Specifically, as shown in Figure 3 The diaphragm base includes a triangular corrugated diaphragm base 100.

[0037] The two groups of small corrugations are symmetrically distributed about the wave crest of the triangular corrugation 110. The present scheme is thus designed so as to make each corrugation of the triangular corrugated diaphragm have a larger extension potential.

[0038] Further, as shown in Figure 3As shown, each group of small corrugations contains one or more, and the number of small corrugations in each group is equal. This design ensures that each corrugation of the triangular corrugated diaphragm has a balanced extension potential on both sides.

[0039] Furthermore, such as Figure 3 As shown, in the two sets of small corrugations, the peaks of multiple small corrugations in one set correspond one-to-one with the peaks of multiple small corrugations in the other set, and are distributed at the same height. This design allows each corrugation of the triangular corrugated diaphragm to obtain balanced extension potential on both sides, thereby helping the triangular corrugated diaphragm to achieve balanced deformation under pressure.

[0040] In this design, to ensure that each corrugation of the diaphragm substrate has a longer cross-section and intersects with the diaphragm, thereby maximizing the elongation potential of the diaphragm substrate, such as... Figure 3 or Figure 6 As shown, the waveforms of small ripples include, but are not limited to, small circular arc ripples 211, small triangular ripples 111, small trapezoidal ripples, or small sinusoidal ripples.

[0041] Specifically, such as Figure 3 As shown, the diaphragm substrate includes a triangular corrugated diaphragm substrate 100, and each triangular corrugation 110 of the triangular corrugated diaphragm substrate 100 has several small triangular corrugations 111. This design not only helps the triangular corrugated diaphragm achieve better sensitivity but also facilitates molding and manufacturing. Furthermore, as... Figures 3 to 5 As shown, under the same conditions, the triangular corrugated diaphragm is subjected to the same (as above) Figure 1 and Figure 2 After a small pressure P is applied, the upward displacement of the triangular corrugated diaphragm is S2.

[0042] To further optimize the above technical solutions, such as Figure 6 As shown, the diaphragm substrate includes an arc-shaped corrugated diaphragm substrate 200, and each arc-shaped corrugation 210 of the arc-shaped corrugated diaphragm substrate 200 is provided with several small arc-shaped corrugations 211. This design not only helps the arc-shaped corrugated diaphragm achieve better sensitivity but also facilitates molding and manufacturing. Furthermore, as... Figures 6 to 8 As shown, under the same conditions, the arc-shaped corrugated diaphragm is subjected to the same (as above) Figure 1 and Figure 2 After a small pressure P is applied, the upward displacement of the arc-shaped corrugated diaphragm is S2.

[0043] Further, the diaphragm base is provided with a plurality of small circular-arc corrugations 211, small triangular corrugations 111, small trapezoidal corrugations and / or small sinusoidal corrugations in each corrugation. The diaphragm base includes a triangular corrugation diaphragm base 100, a circular-arc corrugation diaphragm base 200, a trapezoidal corrugation diaphragm base or a sinusoidal corrugation diaphragm base. That is, each large corrugation of the diaphragm base can be provided with a plurality of small corrugations of different shapes or a single small corrugation of the same shape, i.e. each large corrugation of the diaphragm base is combined with a plurality of small corrugations of different shapes, so as to make the diaphragm obtain more excellent sensitivity.

[0044] The embodiments of the present application also provide an instrument, which comprises a diaphragm, and the diaphragm is the novel pressure sensing diaphragm as described above. Since the novel pressure sensing diaphragm is adopted in the present application, the corresponding beneficial effects are also obtained, which can be referred to the above description and will not be repeated here.

[0045] The embodiments are described in a progressive manner in the specification, and each embodiment mainly explains the difference from other embodiments, and the same or similar parts of each embodiment can be referred to each other.

[0046] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A novel pressure sensing diaphragm comprising a diaphragm base, characterized in that, Each corrugation of the diaphragm base is provided with a plurality of small corrugations; Each corrugation of the diaphragm base is provided with a plurality of small corrugations between the wave crest and the wave trough; The wave shape of the small corrugation includes but is not limited to small circular-arc corrugation (211), small triangular corrugation (111), small trapezoidal corrugation or small sinusoidal corrugation; The diaphragm base includes a circular-arc corrugation diaphragm base (200), each circular-arc corrugation (210) of the circular-arc corrugation diaphragm base (200) is provided with a plurality of small circular-arc corrugations (211); Alternatively, the diaphragm base includes a triangular corrugation diaphragm base (100); The triangular corrugation diaphragm base (100) is provided with two groups of small corrugations on both sides of the wave crest of each triangular corrugation (110) and symmetrically distributed about the wave crest of the triangular corrugation (110).

2. The novel pressure sensing diaphragm according to claim 1, wherein, The number of each group of small corrugations is one or more, and the number of each group of small corrugations is equal.

3. The novel pressure sensing diaphragm according to claim 2, wherein, In the two groups of small corrugations, the wave crests of the plurality of small corrugations in one group are distributed in one-to-one correspondence with the wave crests of the plurality of small corrugations in the other group.

4. The novel pressure sensing diaphragm of claim 1, wherein, The diaphragm base includes a triangular corrugation diaphragm base (100), each triangular corrugation (110) of the triangular corrugation diaphragm base (100) is provided with a plurality of small triangular corrugations (111).

5. The novel pressure sensing diaphragm of claim 1, wherein, Each corrugation of the diaphragm base is provided with a plurality of small circular-arc corrugations (211), small triangular corrugations (111), small trapezoidal corrugations and / or small sinusoidal corrugations.

6. An instrument comprising a diaphragm, characterised in that The diaphragm is a novel pressure sensing diaphragm as claimed in any one of claims 1-5.

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