Pressure transmitting assembly and pressure transmitter

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By designing the pressure transfer assembly in the pressure transmitter, the combined structure of the diaphragm and the substrate is used to prevent the spread of the medium, the problem of excessive pressure source to be measured is solved, and the effect of protecting the pressure transfer diaphragm is achieved, and the service life of the equipment is extended.

CN119935360APending Publication Date: 2025-05-06SHANGHAI ROCKSENSOR AUTOMATION

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Patent Information

Application Number: CN202510052112.X
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Filing Date: 2025-01-13
Publication Date: 2025-05-06

AI Technical Summary

Technical Problem

Excessive pressure of the pressure source to be measured may damage the pressure measuring diaphragm, causing the pressure transfer diaphragm to be contaminated or damaged, thereby damaging the entire pressure transmitter.

Method used

A pressure transfer assembly is designed, including a diaphragm and a substrate, for conducting pressure in the pressure conduction path of the pressure transmitter. The pressure transfer assembly forms a sealing cavity by providing a diaphragm and a substrate between the first diaphragm and the second diaphragm to prevent the spread of the medium and protect the second diaphragm from damage.

Benefits of technology

It effectively prevents the medium to be tested from spreading under high pressure, avoids contamination or damage to the second diaphragm, extends the service life of the pressure transmitter, and facilitates disassembly and reuse during maintenance.

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Abstract

The invention provides a pressure transmission assembly and a pressure transmitter, the pressure transmission assembly is used for transmitting pressure in a pressure transmission path of the pressure transmitter, the pressure transmitter comprises a first diaphragm and a second diaphragm, the first diaphragm is communicated with a pressure source to be measured, the second diaphragm is communicated with a piezoelectric conversion assembly, and the piezoelectric conversion assembly is connected with the first diaphragm and the second diaphragm. The pressure transmitting assembly comprises a membrane suitable for being arranged between the first membrane and the second membrane in an attached mode. The base body is fixedly connected with the periphery of the diaphragm; the pressure transmitter comprises the above pressure transmission assembly. The problem that when the pressure of the to-be-measured pressure source is too large, the pressure measuring diaphragm is broken through and damaged, and then the pressure transmitting diaphragm on the other side is further affected, polluted and even damaged is solved.

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Description

Technical Field

[0001] The invention relates to the technical field of pressure monitoring, and in particular to a pressure transmission component and a pressure transmitter. Background Art

[0002] In a pressure transmitter, when the pressure of the medium to be measured is too high, the medium to be measured may damage the pressure measuring diaphragm in direct contact with it, and further diffuse and spread through the capillary connected to the pressure measuring diaphragm, and affect the pressure transmitting diaphragm on the other side of the capillary under the extremely large pressure shock. The pressure transmitting diaphragm on the other side is likely to be contaminated or even damaged under the large pressure shock, thereby causing damage to the entire pressure transmitter.

[0003] Therefore, how to solve the problem that when the pressure of the pressure source to be measured is too high and the pressure measuring diaphragm is broken and damaged, it will further spread, pollute or even damage the pressure transmitting diaphragm on the other side needs to be studied urgently. Summary of the invention

[0004] The purpose of the present invention is to provide a pressure transmission component and a pressure transmitter to solve the problem that when the pressure of the pressure source to be measured is too high and breaks through and damages the pressure measuring diaphragm, it further spreads, pollutes or even damages the pressure transmission diaphragm on the other side.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A pressure transmission component is used to transmit pressure in a pressure transmission path of a pressure transmitter, wherein the pressure transmitter comprises a first diaphragm and a second diaphragm, wherein the first diaphragm is connected to a pressure source to be measured, and the second diaphragm is connected to a piezoelectric conversion component.

[0007] The pressure transmission component comprises:

[0008] A membrane, adapted to be fitted between the first membrane and the second membrane;

[0009] A substrate is fixedly connected to the periphery of the diaphragm.

[0010] In some embodiments of the present invention, the base is annular, and the periphery of the diaphragm is fixedly connected to the edge of the base.

[0011] In some embodiments of the present invention, the substrate is tubular, and the periphery of the diaphragm is fixedly connected to a flange on the inner wall surface of the substrate and / or is fixedly connected to a port of the substrate.

[0012] In some embodiments of the present invention, the number of diaphragms in the pressure transmission component is two, one diaphragm is suitable for fitting with the first diaphragm, and the other diaphragm is suitable for fitting with the second diaphragm, and the two diaphragms and the base together enclose a sealed cavity, and the sealed cavity contains a pressure transmission medium.

[0013] In some embodiments of the present invention, the pressure transmitter includes a nut seat and a threaded tube.

[0014] in,

[0015] The first diaphragm is arranged in the nut seat, the second diaphragm is arranged in the threaded tube, the pressure transmission component is suitable for being arranged in the nut seat and being located between the first diaphragm and the second diaphragm, and the threaded tube is thread-locked with the nut seat so that the pressure transmission component is fixed in the nut seat;

[0016] Alternatively, the first diaphragm is provided in the threaded tube, the second diaphragm is provided in the nut seat, the pressure transmission component is suitable for being provided in the nut seat and being located between the first diaphragm and the second diaphragm, and the threaded tube and the nut seat are threadedly locked to fix the pressure transmission component in the nut seat.

[0017] In some embodiments of the present invention, the outer wall surface of the base is provided with threads, so that the pressure transmission component can be fixed by threaded cooperation with the nut seat via the outer wall surface of the base.

[0018] In some embodiments of the present invention, the pressure transmitter comprises two nut seats, and the first diaphragm and the second diaphragm are respectively arranged in one of the nut seats;

[0019] The outer wall surface of the base of the pressure transmission component is provided with threads, one end of the pressure transmission component is suitable for being screwed into one of the nut seats, and the other end is suitable for being screwed into another of the nut seats.

[0020] In some embodiments of the present invention, the pressure transmitter comprises two threaded tubes, and the first diaphragm and the second diaphragm are respectively arranged in one of the threaded tubes;

[0021] The inner wall surface of the base of the pressure transmission component is provided with threads, one end of the pressure transmission component is suitable for being screwed into one of the threaded tubes, and the other end is suitable for being screwed into another of the threaded tubes.

[0022] In order to achieve the above object, the present invention also provides the following technical solutions:

[0023] A pressure transmitter, comprising:

[0024] A first diaphragm, adapted to be connected to a pressure source to be measured;

[0025] Second diaphragm;

[0026] The pressure transmission component is arranged between the first diaphragm and the second diaphragm;

[0027] The piezoelectric conversion component is connected to the side of the second diaphragm away from the pressure transmission component, and is used to convert the pressure transmitted through the first diaphragm, the pressure transmission component and the second diaphragm in sequence into an electrical signal.

[0028] In some embodiments of the present invention, the pressure transmitter is used to measure the internal pressure of a nuclear power plant containment vessel;

[0029] The pressure transmitter further comprises a pressure measuring diaphragm, and the pressure measuring diaphragm is connected with the first diaphragm via a capillary tube;

[0030] The pressure measuring diaphragm is suitable for being arranged inside the containment of a nuclear power plant to measure the internal pressure of the containment, and the first diaphragm, the second diaphragm, the piezoelectric conversion component and the pressure transmission component are suitable for being arranged outside the containment.

[0031] In some embodiments of the present invention, the capillary tube is adapted to penetrate the containment vessel;

[0032] Alternatively, the pressure transmitter includes a through tube body, the through tube body is arranged to penetrate the containment shell, a through cavity is arranged inside the through tube body, there are two capillaries, the two capillaries are respectively connected to one end of the through cavity, one of the capillaries is suitable for the inside of the containment shell and is connected to the pressure measuring diaphragm, and the other capillary is arranged outside the containment shell and is connected to the pressure transmission component.

[0033] Further areas of applicability will become apparent from the description provided in the present disclosure.

[0034] The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.

[0035] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0036] 1. The present invention provides a pressure transmission structure and a pressure transmitter using the pressure transmission structure, which can solve the problem that when the pressure of the pressure source to be measured is too high and the pressure measuring diaphragm is broken and damaged, it will further spread, pollute or even damage the pressure transmission diaphragm on the other side;

[0037] 2. The product provided by the present invention can be very conveniently disassembled and reused during subsequent inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some implementation plans of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 A schematic diagram of the structure of a pressure transmission component provided in the first embodiment of the present invention;

[0040] Figure 2 A schematic diagram of the assembly relationship between the pressure transmission component and two diaphragms on the pressure transmitter provided in the second embodiment of the present invention;

[0041] Figure 3 A schematic diagram of the assembly relationship between the pressure transmission component and two diaphragms on the pressure transmitter provided in the third embodiment of the present invention;

[0042] Figure 4 A schematic diagram of the assembly relationship between the pressure transmission component and two diaphragms on the pressure transmitter provided in the fourth embodiment of the present invention;

[0043] Figure 5 A schematic diagram of the assembly relationship between the pressure transmission component and two diaphragms on the pressure transmitter provided in the fifth embodiment of the present invention;

[0044] Figure 6 A schematic diagram of the structure of a pressure transmitter provided in a sixth embodiment of the present invention installed on the containment vessel of a nuclear power plant.

[0045] Description of Reference Numerals

[0046] 1-pressure transmission component; 11-diaphragm; 12-substrate;

[0047] 2- piezoelectric conversion component;

[0048] 3- containment shell; 30- pipeline penetrating the containment shell;

[0049] 4-through the tube body;

[0050] 51-first diaphragm; 52-second diaphragm; 53-nut seat; 54-threaded pipe;

[0051] 6-capillary; 7-pressure measuring diaphragm. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present invention. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0053] Any specific numerical value disclosed herein (including the endpoint of the numerical range) is not limited to the exact value of the numerical value, but should be understood to also cover values close to the exact value, such as all possible numerical values within the range of ±5% of the exact value. In addition, for the disclosed numerical range, the endpoint values of the range, the endpoint values and the specific point values in the range, and the specific point values can be arbitrarily combined to obtain one or more new numerical ranges, and these new numerical ranges should also be regarded as specifically disclosed herein.

[0054] The terms used in the present disclosure are only intended to describe specific exemplary embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "a kind of" and "the" as used in the present disclosure may be intended to also include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive, thus illustrating the presence of the features, elements, compositions, steps, integers, operations and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or their collections. Although the open term "comprise" should be understood as a non-limiting term for describing and claiming the various embodiments described in the present disclosure, in some aspects, the term may be alternatively understood as a more restrictive and limited term, such as "consisting of..." or "consisting essentially of..." Thus, for any given embodiment of a narration composition, material, component, element, feature, integer, operation and / or process step, the present disclosure also particularly includes an embodiment consisting of or essentially consisting of such a composition, material, component, element, feature, integer, operation and / or process step. In the case of “consisting of,” alternative embodiments exclude any additional compositions, materials, components, elements, features, integers, operations and / or process steps, while in the case of “consisting essentially of,” any additional compositions, materials, components, elements, features, integers, operations and / or process steps that materially affect the basic and novel characteristics are excluded from such embodiments, but any compositions, materials, components, elements, features, integers, operations and / or process steps that do not materially affect the basic and novel characteristics may be included in the embodiments.

[0055] Any method steps, processes, and operations described in the present disclosure should not be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless expressly identified as a certain order of performance. It should also be understood that additional or alternative steps may be used unless otherwise stated.

[0056] In this application, except for the contents explicitly described, any matters or items not mentioned are directly applicable to those known in the art without any changes. Moreover, any embodiment described in this disclosure can be freely combined with one or more other embodiments described in this disclosure, and the technical solutions or technical ideas formed thereby are regarded as part of the original disclosure or original record of this application, and should not be regarded as new contents that have not been disclosed or anticipated in this disclosure, unless a person skilled in the art considers that the combination is obviously unreasonable.

[0057] Unless otherwise specified, the terms used herein have the same meaning as commonly understood by those skilled in the art. If a term is defined herein and its definition is different from the commonly understood meaning in the art, the definition herein shall prevail.

[0058] First aspect

[0059] See also Figures 1 to 6 The present invention provides a pressure transmission component 1 for transmitting pressure in a pressure transmission path of a pressure transmitter, wherein the pressure transmitter comprises a first diaphragm 51 and a second diaphragm 52, wherein the first diaphragm 51 is connected to a pressure source to be measured, and the second diaphragm 52 is connected to a piezoelectric conversion component, and the pressure transmission component 1 comprises: a diaphragm 11, which is suitable for being fitted between the first diaphragm 51 and the second diaphragm 52; and a substrate 12, which is fixedly connected to the periphery of the diaphragm 11.

[0060] Specifically, when the first diaphragm 51 connected to the pressure source to be measured is impacted by the pressure source or the medium to be measured due to an accident, the first diaphragm 51 may be damaged and destroyed due to its insufficient strength. The present invention provides a protective barrier through the above-mentioned pressure transmission component 1 to avoid the expansion of the damage range as much as possible. The pressure transmission component 1 can block the medium to be measured on the side away from the second diaphragm 52, thereby protecting the second diaphragm 52 from being affected or reducing the impact as much as possible.

[0061] See also Figure 1 In some embodiments of the present invention, the base 12 is annular, and the periphery of the diaphragm 11 is fixedly connected to the edge of the base 12 .

[0062] See also Figure 2 and Figure 3 In some embodiments of the present invention, the base 12 is tubular, and the periphery of the diaphragm 11 is fixedly connected to the flange on the inner wall of the base 12. Specifically, the periphery of the diaphragm 11 and the flange on the inner wall of the base 12 can be fixed by welding, and of course, other specific methods can be used to fix them.

[0063] See also Figure 4 and Figure 5In some embodiments of the present invention, the substrate 12 is tubular, and the periphery of the diaphragm 11 is fixedly connected to the port of the substrate 12 .

[0064] See also Figure 3 and Figure 4 In some embodiments of the present invention, the number of diaphragms 11 of the pressure transmission component 1 is two, one diaphragm 11 is suitable for fitting with the first diaphragm 51, and the other diaphragm 11 is suitable for fitting with the second diaphragm 52. The two diaphragms 11 and the base 12 together enclose a sealed cavity, and the sealed cavity contains a pressure transmission medium. It is worth noting that in some embodiments of the present invention, by arranging two diaphragms 11 in the pressure transmission component 1, the protection capability against sudden pressure surge caused by accidents is further improved. Even if the diaphragm 11 close to the first diaphragm 51 is destroyed by the medium to be measured, the remaining diaphragm 11 close to the second diaphragm 52 can continue to isolate the medium to be measured and prevent pollution and damage from expanding.

[0065] See also Figure 5 In some embodiments of the present invention, the pressure transmitter includes a nut seat 53 and a threaded tube 54, wherein the first diaphragm 51 is disposed in the nut seat 53, the second diaphragm 52 is disposed in the threaded tube 54, the pressure transmission component 1 is adapted to be disposed in the nut seat 53 and between the first diaphragm 51 and the second diaphragm 52, and the threaded tube 54 is thread-locked with the nut seat 53 to fix the pressure transmission component 1 in the nut seat 53. Obviously, the pressure transmission component 1 provided by the present invention can also be very conveniently disassembled and reused during subsequent inspection and maintenance.

[0066] In some embodiments of the present invention, the pressure transmitter includes a nut seat 53 and a threaded tube 54, wherein the first diaphragm 51 is disposed in the threaded tube 54, the second diaphragm 52 is disposed in the nut seat 53, the pressure transmission component 1 is adapted to be disposed in the nut seat 53 and between the first diaphragm 51 and the second diaphragm 52, and the threaded tube 54 is thread-locked with the nut seat 53 to fix the pressure transmission component 1 in the nut seat 53. Obviously, the pressure transmission component 1 provided by the present invention can also be very conveniently disassembled and reused during subsequent inspection and maintenance.

[0067] See also Figure 5 In some embodiments of the present invention, the outer wall of the base 12 is provided with threads, so that the pressure transmission component 1 is fixed by threading with the nut seat 53 via the outer wall of the base 12. Obviously, the pressure transmission component 1 provided by the present invention can also be very conveniently disassembled and reused during subsequent inspection and maintenance.

[0068] In some embodiments of the present invention, the pressure transmitter includes two nut seats 53, the first diaphragm 51 and the second diaphragm 52 are respectively arranged in one of the nut seats 53; the outer wall surface of the base 12 of the pressure transmission component 1 is provided with threads, one end of the pressure transmission component 1 is suitable for being screwed into one of the nut seats 53, and the other end is suitable for being screwed into the other nut seat 53. Obviously, the pressure transmission component 1 provided by the present invention can also be very conveniently disassembled and reused during subsequent inspection and maintenance.

[0069] See also Figure 3 In some embodiments of the present invention, the pressure transmitter includes two threaded tubes 54, the first diaphragm 51 and the second diaphragm 52 are respectively arranged in one of the threaded tubes 54; the inner wall surface of the base 12 of the pressure transmission component 1 is provided with threads, one end of the pressure transmission component 1 is suitable for being screwed into one of the threaded tubes 54, and the other end is suitable for being screwed into the other threaded tube 54. Obviously, the pressure transmission component 1 provided by the present invention can also be very conveniently disassembled and reused during subsequent inspection and maintenance.

[0070] It is understandable that in the above-mentioned various situations, the first diaphragm 51 and the second diaphragm 52 can be carried in different forms of connecting parts, and it is only necessary to achieve a convenient, fast, reliable and efficient detachable connection effect between the two connecting parts that respectively carry the first diaphragm 51 and the second diaphragm 52.

[0071] See also Figures 1 to 5 The structure marked “6” in the five pictures is a capillary tube, which is used to accommodate a pressure-conducting medium to transmit pressure. The pressure-conducting medium can specifically be silicone oil or liquid alloy.

[0072] Second aspect

[0073] See also Figures 1 to 6 The present invention provides a pressure transmitter, which includes: a first diaphragm 51, suitable for being connected to a pressure source to be measured; a second diaphragm 52; the above-mentioned pressure transmission component 1, arranged between the first diaphragm 51 and the second diaphragm 52; a piezoelectric conversion component 2, connected to the side of the second diaphragm 52 away from the pressure transmission component 1, and used for converting the pressure transmitted via the first diaphragm 51, the pressure transmission component 1 and the second diaphragm 52 in sequence into an electrical signal.

[0074] Specifically, when an accident occurs, the pressure of the pressure source to be measured increases sharply, which may impact the first diaphragm 51 and damage it. The pressure transmission component 1 provided by the present invention can block the measured medium that spreads to the first diaphragm 51 under the action of high pressure, preventing the measured medium from further spreading and contaminating or even destroying the second diaphragm 52. Therefore, the pressure transmission component 1 provided by the present invention and the pressure transmitter using the pressure transmission component 1 can solve the problem that when the pressure of the pressure source to be measured is too high and breaks through and damages the pressure measuring diaphragm, it will further spread, contaminate or even damage the pressure transmission diaphragm on the other side.

[0075] See also Figure 6 In some embodiments of the present invention, the pressure transmitter is used to measure the internal pressure of the containment vessel 3 of a nuclear power plant; the pressure transmitter also includes a pressure measuring diaphragm 7, which is connected to the first diaphragm 51 via a capillary 6; wherein the pressure measuring diaphragm 7 is suitable for being arranged inside the containment vessel 3 of a nuclear power plant to measure the internal pressure of the containment vessel 3, and the first diaphragm 51, the second diaphragm 52, the piezoelectric conversion assembly 2 and the pressure transmission assembly 1 are suitable for being arranged outside the containment vessel 3.

[0076] It is worth noting that, see also Figure 5 and Figure 6 In this embodiment, Figure 5 The tubular substrate 12 is accommodated in Figure 5 and Figure 6 The nut seat 53 shown in FIG. 1 and the threaded tube 54 are as shown in FIG. Figure 5 and Figure 6 As shown, the nut seat 53 is screwed into the nut seat 53 and fixed by threaded cooperation to fix the tubular base 12 between the first diaphragm 51 and the second diaphragm 52, so that the diaphragms 11 on the two end faces of the tubular base 12 are respectively fitted with the first diaphragm 51 and the second diaphragm 52; in some embodiments, threads can be added to the outer circumferential surface of the tubular base 12 on the basis of the above, so that the tubular base 12 can be fixed by threaded cooperation with the nut seat 53, or the tubular base 12 can be made into a structure similar to the threaded tube 54.

[0077] Specifically, when an accident occurs inside the containment 3 of a nuclear bomb station, the pressure of the pressure source to be measured increases sharply, which may impact the first diaphragm 51 and damage it. The pressure transmission component 1 provided by the present invention can block the measured medium that spreads to the first diaphragm 51 under the action of high pressure, preventing the measured medium from further spreading and contaminating or even destroying the second diaphragm 52. Therefore, the pressure transmission component 1 provided by the present invention and the pressure transmitter using the pressure transmission component 1 can solve the problem that when the pressure of the pressure source to be measured is too high and breaks through and damages the pressure measuring diaphragm, it will further spread, contaminate or even damage the pressure transmission diaphragm on the other side.

[0078] In some embodiments of the present invention, the capillary tube 6 is suitable for penetrating the containment vessel 3 .

[0079] See also Figure 6 In some embodiments of the present invention, the pressure transmitter includes a through tube body 4, which is arranged to penetrate the containment shell 3, and a through cavity is arranged inside the through tube body 4. There are two capillaries 6, and the two capillaries 6 are respectively connected to one end of the through cavity, one of the capillaries 6 is suitable for the inside of the containment shell 3 and is connected to the pressure measuring diaphragm 7, and the other capillary 6 is arranged outside the containment shell 3 and is connected to the pressure transmission component 1.

[0080] See also Figure 6 In some embodiments of the present invention, a through-pipe 30 is provided on the containment shell 3 , and the through-pipe body 4 is throughly accommodated in the through-pipe 30 .

[0081] See also Figure 6 The pressure measuring diaphragm 7 is accommodated inside the nuclear power plant containment 3 and is used to contact the measured medium. The pressure of the measured medium is applied to the pressure measuring diaphragm 7 and is transmitted to the first diaphragm 51, the pressure transmission component 1 and the second diaphragm 52 in sequence through the capillary 6 and the pressure-conducting medium. The pressure is then transmitted to the piezoelectric conversion component 2 through another capillary 6 and the pressure-conducting medium inside it to convert the pressure signal into an electrical signal.

[0082] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims. In addition, the specification uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. The content of this specification should not be understood as a limitation on the present invention.

Claims

1. A pressure transmission component (1) for transmitting pressure in a pressure transmission path of a pressure transmitter, the pressure transmitter comprising a first diaphragm (51) and a second diaphragm (52), the first diaphragm (51) being connected to a pressure source to be measured, the second diaphragm (52) being connected to a piezoelectric conversion component, characterized in that: The pressure transmission component (1) comprises: A membrane (11) adapted to be disposed between the first membrane (51) and the second membrane (52); The base (12) is fixedly connected to the periphery of the diaphragm (11).

2. The pressure transmission component (1) according to claim 1, characterized in that: The base (12) is annular, and the periphery of the diaphragm (11) is fixedly connected to the edge of the base (12).

3. The pressure transmission component (1) according to claim 1, characterized in that: The base (12) is tubular, and the periphery of the diaphragm (11) is fixedly connected to a flange on the inner wall surface of the base (12), and / or is fixedly connected to a port of the base (12).

4. The pressure transmission component (1) according to claim 3, characterized in that: The number of diaphragms (11) of the pressure transmission component (1) is two, one diaphragm (11) is suitable for fitting with the first diaphragm (51), and the other diaphragm (11) is suitable for fitting with the second diaphragm (52), and the two diaphragms (11) and the base (12) together enclose a sealed cavity, and the sealed cavity contains a pressure transmission medium.

5. The pressure transmission component (1) according to any one of claims 2 to 4, characterized in that: The pressure transmitter comprises a nut seat (53) and a threaded tube (54). in, The first diaphragm (51) is arranged in the nut seat (53), the second diaphragm (52) is arranged in the threaded tube (54), the pressure transmission component (1) is suitable for being arranged in the nut seat (53) and being located between the first diaphragm (51) and the second diaphragm (52), and the threaded tube (54) and the nut seat (53) are thread-locked so that the pressure transmission component (1) is fixed in the nut seat (53); Alternatively, the first diaphragm (51) is provided in the threaded tube (54), the second diaphragm (52) is provided in the nut seat (53), the pressure transmission component (1) is suitable for being provided in the nut seat (53) and being located between the first diaphragm (51) and the second diaphragm (52), and the threaded tube (54) and the nut seat (53) are threadedly locked so that the pressure transmission component (1) is fixed in the nut seat (53).

6. The pressure transmission component (1) according to claim 5, characterized in that: The outer wall surface of the base (12) is provided with threads, so that the pressure transmission component (1) is fixed with the nut seat (53) through the outer wall surface of the base (12) through threaded cooperation.

7. The pressure transmission component (1) according to any one of claims 1 to 4, characterized in that: The pressure transmitter comprises two nut seats (53), wherein the first diaphragm (51) and the second diaphragm (52) are respectively arranged in one of the nut seats (53); The outer wall surface of the base (12) of the pressure transmission component (1) is provided with threads, and one end of the pressure transmission component (1) is suitable for being screwed into one of the nut seats (53), and the other end is suitable for being screwed into another of the nut seats (53).

8. The pressure transmission component (1) according to any one of claims 1 to 4, characterized in that: The pressure transmitter comprises two threaded tubes (54), wherein the first diaphragm (51) and the second diaphragm (52) are respectively arranged in one of the threaded tubes (54); The inner wall surface of the base (12) of the pressure transmission component (1) is provided with threads; one end of the pressure transmission component (1) is suitable for being screwed into one of the threaded tubes (54), and the other end is suitable for being screwed into another of the threaded tubes (54).

9. A pressure transmitter, characterized in that: The pressure transmitter comprises: A first diaphragm (51) adapted to be connected to a pressure source to be measured; A second diaphragm (52); The pressure transmission component (1) according to any one of claims 1 to 8, arranged between the first diaphragm (51) and the second diaphragm (52); The piezoelectric conversion component (2) is connected to the side of the second diaphragm (52) facing away from the pressure transmission component (1), and is used to convert the pressure transmitted sequentially through the first diaphragm (51), the pressure transmission component (1) and the second diaphragm (52) into an electrical signal.

10. The pressure transmitter according to claim 9, characterized in that: The pressure transmitter is used to measure the internal pressure of the containment vessel (3) of a nuclear power plant; The pressure transmitter further comprises a pressure measuring diaphragm (7), wherein the pressure measuring diaphragm (7) is connected to the first diaphragm (51) via a capillary tube (6); The pressure measuring diaphragm (7) is suitable for being arranged inside the containment vessel (3) of a nuclear power plant to measure the internal pressure of the containment vessel (3), and the first diaphragm (51), the second diaphragm (52), the piezoelectric conversion component (2) and the pressure transmission component (1) are suitable for being arranged outside the containment vessel (3).

11. The pressure transmitter according to claim 10, characterized in that: The capillary tube (6) is suitable for penetrating the containment vessel (3); Alternatively, the pressure transmitter comprises a through-tube body (4), the through-tube body (4) is arranged to penetrate the containment shell (3), a through-cavity is arranged inside the through-tube body (4), there are two capillaries (6), the two capillaries (6) are respectively connected to one end of the through-cavity, one of the capillaries (6) is suitable for the inside of the containment shell (3) and is connected to the pressure measuring diaphragm (7), and the other capillary (6) is arranged outside the containment shell (3) and is connected to the pressure transmission component (1).