Pressure transmitter

Abstract

The invention provides a pressure transmitter, which is used for detecting the internal pressure of a containment of a nuclear power plant, and comprises an in-shell module used for detecting the internal pressure of the containment; the out-shell module is used for receiving the pressure signal measured by the in-shell module and converting the pressure signal into an electric signal, and the out-shell module comprises a signal conversion assembly; the shell penetrating module is suitable for penetrating through the containment; wherein any one of the out-of-shell module and the through-shell module comprises a separation assembly, the separation assembly comprises two parts which are detachably connected with each other, one part is connected with the signal conversion assembly, and the other part is connected with the through-shell module or integrally formed with the through-shell module. According to the pressure transmitter for the containment vessel, the problem that an existing pressure transmitter for the containment vessel is inconvenient to install and use on site is solved, and the uncertainty risk of process implementation caused by the fact that the pressure transmitter for the containment vessel is installed on site and filled with pressure guide liquid can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power plant containment pressure monitoring, and in particular to a pressure transmitter. Background Art

[0002] The containment of a nuclear power plant is a prestressed concrete thick-walled container with an inner steel plate lining and a hemispherical top. The containment is completely sealed and isolated from the external environment to prevent and limit the spread of fissionable radioactive materials after a reactor accident and protect the public from harm by radioactive materials. The safe operation of the reactor and abnormal accident conditions are closely related to the pressure changes in the containment, so daily pressure testing is extremely important.

[0003] At present, the pressure transmitter for containment is mainly a remote diaphragm seal device with capillary oil filling type for pressure measurement. The diaphragm seal device is placed inside the containment, and the transmitter body is placed outside the containment, and they are connected with an oil-filled capillary. Due to the sealing surface requirements of the containment, the capillary can only be connected through the containment through-tube.

[0004] However, the above scheme has the following problems that need to be solved urgently: 1. When the transmitter is manufactured, the pressure measuring diaphragm box and the differential pressure transmitter need to be separated and isolated from each other, generally connected or disconnected by a capillary thread, and then connected after penetrating the containment on site; 2. After the connection is checked, the sealed cavity after the connection also needs to be tested for sealing leakage rate, wherein the sealed cavity refers to the area used to accommodate the pressure-conducting medium, including the space inside the capillary tube, and oil is filled after checking the sealing. After filling with oil, a pressure pump leakage test is required; 3. In addition, on-site silicone oil filling also involves special mobile filling equipment, and the on-site filling process is not convenient to control, which brings performance risks to the instrument. Summary of the invention

[0005] The purpose of the present invention is to provide a pressure transmitter to solve the problem that the existing pressure transmitter for containment is inconvenient to install and use on site, and to avoid the uncertainty risk in the process implementation caused by the on-site installation and filling of pressure conducting fluid for containment.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A pressure transmitter for detecting the internal pressure of a containment vessel of a nuclear power plant, the pressure transmitter comprising:

[0008] An in-shell module, adapted to be disposed inside the containment shell and used to detect the internal pressure of the containment shell;

[0009] an outer shell module, adapted to be arranged outside the containment shell, for receiving the pressure signal measured by the inner shell module and converting it into an electrical signal, wherein the outer shell module includes a signal conversion component;

[0010] A shell penetration module, adapted to penetrate the containment shell, and connected between the inner shell module and the outer shell module;

[0011] Among them, any one of the outer-shell module or the through-shell module includes a separation component, which includes two parts that are detachably connected to each other, one part is connected to the signal conversion component, and the other part is connected to the through-shell module or is integrally formed with the through-shell module.

[0012] In some embodiments of the present invention, the in-shell module comprises:

[0013] First capillary;

[0014] A base, one end of which is provided with a pressure port, and the other end of which is connected to the first capillary tube, wherein the pressure port can be connected to the interior of the containment shell, and the end of the first capillary tube away from the base is connected to the outer shell module;

[0015] The pressure measuring diaphragm is accommodated in the base and isolated between the first capillary tube and the pressure taking port.

[0016] In some embodiments of the present invention, the in-shell module further comprises a first oil-filling pipe, which is disposed on a side of the pressure measuring diaphragm away from the pressure tapping port and is connected to an end of the first capillary tube close to the pressure measuring diaphragm.

[0017] In some embodiments of the present invention, the base includes interconnected:

[0018] a diaphragm seat, penetrated by the first capillary tube and the first oil-filled tube respectively;

[0019] A head cover, provided with the pressure taking port;

[0020] Wherein, the pressure measuring diaphragm is arranged between the diaphragm seat and the head cover.

[0021] In some embodiments of the present invention, the base further includes bolts and nuts, the bolts pass through the diaphragm seat and the head cover, and the diaphragm seat and the head cover are fixed by the bolts and nuts.

[0022] In some embodiments of the present invention, the base further comprises a sealing gasket, which is in an annular shape and is disposed between the diaphragm seat and the head cover, and the pressure measuring diaphragm is located in a circular vacant area of ​​the annular sealing gasket.

[0023] In some embodiments of the present invention, the shell penetration module includes a through-tube body, which is suitable for being accommodated in a through-pipe of the containment shell, one end of the through-tube body is connected to the first capillary tube, and the other end is connected to the outer shell module.

[0024] In some embodiments of the present invention, the outer shell module includes a second capillary, a separation component and a third capillary, and the separation component is connected between the second capillary and the third capillary.

[0025] In some embodiments of the present invention, the outer circumferences of the first capillary tube, the second capillary tube and the third capillary tube are all sheathed with an armored metal tube.

[0026] In some embodiments of the present invention, the separation component comprises:

[0027] a first connecting member, connected to the second capillary;

[0028] A first diaphragm is provided at an end of the first connecting member away from the second capillary tube and is connected to the second capillary tube;

[0029] A second connecting member, detachably connected to the first connecting member and communicated with the third capillary;

[0030] A second diaphragm is provided at an end of the second connecting member away from the third capillary tube and is connected to the third capillary tube;

[0031] Wherein, the first diaphragm and the second diaphragm are in contact with each other or transmit pressure via a pressure transmission component.

[0032] In some embodiments of the present invention, the pressure transmission component is a pressure-conducting diaphragm, and the pressure-conducting diaphragm is disposed between the first diaphragm and the second diaphragm;

[0033] Alternatively, the pressure transmission component comprises:

[0034] A membrane, adapted to be fitted between the first membrane and the second membrane;

[0035] A substrate is fixedly connected to the periphery of the diaphragm.

[0036] 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.

[0037] In some embodiments of the present invention, the substrate is tubular, and the periphery of the diaphragm is welded to a flange on the inner wall surface of the substrate, and / or is fixedly connected to a port of the substrate.

[0038] In some embodiments of the present invention, the number of diaphragms in the pressure transmission component is two, one diaphragm is in contact with the first diaphragm, and the other diaphragm is in contact with the second diaphragm. The two diaphragms and the substrate together enclose a sealed cavity, and the sealed cavity contains a pressure transmission medium.

[0039] In some embodiments of the present invention, the first connecting member is a nut seat and the first diaphragm is disposed inside, the second connecting member is a threaded tube and the second diaphragm is disposed inside, the pressure transmission component is disposed in the nut seat and is located between the first diaphragm and the second diaphragm, and the threaded tube is thread-locked with the nut seat to fix the pressure transmission component in the nut seat;

[0040] Alternatively, the first connecting member is a threaded tube with the first diaphragm provided inside, the second connecting member is a nut seat with the second diaphragm provided inside, the pressure transmission component is provided in the nut seat and is located between the first diaphragm and the second diaphragm, and the threaded tube is threadedly locked with the nut seat to fix the pressure transmission component in the nut seat.

[0041] 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.

[0042] In some embodiments of the present invention, the first connecting member and the second connecting member are both nut seats, and the first diaphragm and the second diaphragm are respectively arranged in one of the nut seats;

[0043] The outer wall surface of the base of the pressure transmission component is provided with threads, one end of the pressure transmission component is screwed into one of the nut seats, and the other end is screwed into the other nut seat.

[0044] In some embodiments of the present invention, the first connecting member and the second connecting member are both two threaded tubes, and the first diaphragm and the second diaphragm are respectively arranged in one of the threaded tubes;

[0045] The inner wall surface of the base of the pressure transmission component is provided with threads, one end of the pressure transmission component is screwed into one of the threaded tubes, and the other end is screwed into the other threaded tube.

[0046] In some embodiments of the present invention, the first connecting member is a nut seat, the second connecting member is a threaded tube, and the nut seat and the threaded tube are threadedly matched;

[0047] Alternatively, the first connecting member is a threaded pipe, and the second connecting member is a nut seat, and the nut seat and the threaded pipe are threadably matched.

[0048] In some embodiments of the present invention, a side of the first connecting member close to the second capillary tube and a side of the second connecting member close to the third capillary tube are both provided with a protective tube structure;

[0049] One end of the armored metal tube sleeved on the outer periphery of the second capillary tube is accommodated in the protective tube structure on the side of the first connecting piece close to the second capillary tube, and one end of the armored metal tube sleeved on the outer periphery of the third capillary tube is accommodated in the protective tube structure on the side of the connecting piece close to the third capillary tube.

[0050] In some embodiments of the present invention, the signal conversion component includes:

[0051] A first differential pressure transmitter having a second oil-filled tube;

[0052] A second differential pressure transmitter having a third oil-filled tube;

[0053] A three-way pipe, a first pipe end is connected to the first differential pressure transmitter, a second pipe end is connected to the second differential pressure transmitter, and a third pipe end is connected to the third capillary tube;

[0054] Wherein, the first differential pressure transmitter and the second differential pressure transmitter have different measuring ranges.

[0055] In some embodiments of the present invention, a filling liquid is provided in each of the first capillary, the second capillary and the third capillary, and the filling liquid is benzyl silicone oil.

[0056] Further areas of applicability will become apparent from the description provided in the present disclosure.

[0057] 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.

[0058] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0059] 1. The present invention provides a pressure transmitter, which can be used to measure the internal pressure of the containment of a nuclear power plant. The pressure transmitter includes an inner shell module located inside the containment, a through-shell module capable of penetrating the containment, and an outer shell module located outside the containment. The inner shell module measures the internal pressure of the containment, transmits the pressure to the outer shell module via the through-shell module, and converts the pressure signal into an electrical signal.

[0060] 2. The present invention solves the problem that the existing pressure transmitter for containment is inconvenient to install and use on site, and can avoid the uncertainty risk in the process implementation caused by the on-site installation and filling of the pressure conducting fluid for containment;

[0061] 3. The remote transmission split structure of the product provided by the present invention can be directly connected and used after the safety shell is penetrated on site, without subsequent assembly and inspection procedures, thus reducing other risk factors on site;

[0062] 4. The product provided by the present invention does not require on-site silicone oil filling (or filling liquid filling) process;

[0063] 5. The product provided by the present invention can be easily disassembled and reused during subsequent inspection and maintenance;

[0064] 6. The product provided by the present invention can use differential pressure transmitter bodies with different ranges, can provide pressure parameter measurements for normal operation of the containment, and can also provide pressure warnings for abnormal operation of the containment. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 paying any creative work.

[0066] Figure 1 A schematic diagram of the structure of the pressure transmitter provided by the first embodiment of the present invention installed on the containment of a nuclear power plant;

[0067] Figure 2 for Figure 1 A cross-sectional view of a module in a shell;

[0068] Figure 3 for Figure 1 The cross-sectional view of the shell-penetrating module and part of the shell-inside module and the shell-outside module;

[0069] Figure 4 for Figure 1 A schematic diagram of the structure when the separated components are combined;

[0070] Figure 5 for Figure 4 A schematic diagram of the structure when the separation components are separated;

[0071] Figure 6 for Figure 4 A cross-sectional view of a separated component in FIG.

[0072] Figure 7 for Figure 6 A cross-sectional view of the first connecting member in FIG.

[0073] Figure 8 for Figure 6 A cross-sectional view of the second connecting member in FIG.

[0074] Fig. 9 A schematic structural diagram of a pressure transmission assembly provided in a second embodiment of the present invention;

[0075] Fig.10 A schematic structural diagram of a pressure transmission assembly provided in a third embodiment of the present invention;

[0076] Fig.11 A schematic structural diagram of a pressure transmission assembly provided in a fourth embodiment of the present invention;

[0077] Fig.12 A schematic structural diagram of a pressure transmission assembly provided in a fifth embodiment of the present invention;

[0078] Fig.13 A schematic structural diagram of a pressure transmission assembly provided in a sixth embodiment of the present invention;

[0079] Fig.14 A schematic diagram of the structure of a pressure transmitter provided in a seventh embodiment of the present invention installed on the containment vessel of a nuclear power plant.

[0080] Description of Reference Numerals

[0081] 1-module inside the shell; 11-first capillary; 120-pressure port; 121-pressure measuring diaphragm; 122-first oil filling pipe; 123-diaphragm seat; 124-head cover; 125-bolt; 126-nut; 127-sealing gasket;

[0082] 2-penetrating module; 20-penetrating the tube body; 21-penetrating the protective tube on the tube body;

[0083] 3-outside shell module; 30-armored metal tube; 31-second capillary tube; 32-separation component; 321-first connecting piece; 3210-protection tube of first connecting piece; 322-first diaphragm; 323-second connecting piece; 3230-protection tube of second connecting piece; 324-second diaphragm; 33-third capillary tube;

[0084] 4-signal conversion assembly; 41-first differential pressure transmitter; 410-second oil-filled pipe; 42-second differential pressure transmitter; 420-third oil-filled pipe; 43-tee pipe; 431-first pipe end; 432-second pipe end; 433-third pipe end;

[0085] 5-pressure transmission component; 51-diaphragm; 52-substrate;

[0086] 6-containment; 60-through-the-pipe. DETAILED DESCRIPTION

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] See also Figure 1 The present invention provides a pressure transmitter for detecting the internal pressure of a containment shell 6 of a nuclear power plant, the pressure transmitter comprising: an inner shell module 1, suitable for being arranged inside the containment shell 6, for detecting the internal pressure of the containment shell 6; an outer shell module 3, suitable for being arranged outside the containment shell 6, for receiving the pressure signal measured by the inner shell module 1 and converting it into an electrical signal, wherein the outer shell module 3 comprises a signal conversion component 4; a penetrating shell module 2, suitable for being arranged through the containment shell 6, the penetrating shell module 2 is connected between the inner shell module 1 and the outer shell module 3; any one of the outer shell module 3 or the penetrating shell module 2 comprises a separation component 32, the separation component 32 comprises two parts which are detachably connected to each other, wherein one part is connected to the signal conversion component 4, and the other part is connected to the penetrating shell module 2 or is integrally formed with the penetrating shell module 2.

[0094] It is understandable that the two detachably connected parts of the separation component 32 can be connected to each other by threading or other means.

[0095] See also Figure 1 It is worth noting that, in some embodiments, the separation component 32 is part of the outer shell module 3. In this case, the part of the separation component 32 that is close to the shell penetration module 2 and can be disassembled will be indirectly connected to the shell penetration module 2 via other parts of the outer shell module 3; in other embodiments, the part of the separation component 32 that is close to the shell penetration module 2 and can be disassembled will be directly connected to the shell penetration module 2.

[0096] See also Fig.14In other embodiments, the separation component 32 is part of the shell penetration module 2. In this case, a part of the separation component 32 and the shell penetration module 2 can be welded or integrally formed, while the other part of the separation component 32 is connected to the outer shell module 3.

[0097] It is worth mentioning that in the prior art, since there is no separation component 32 provided by the present invention, the pressure transmitter needs to be sent from the factory to the site for step-by-step installation, sealing test, filling, and pressure pump leakage test after filling, etc., and there are many inconveniences during on-site installation, and there are many uncertain risks in the on-site process implementation. The present invention is aimed at this problem and provides the above-mentioned separation component 32 composed of two detachable parts, so that the pressure transmitter provided by the present invention can be pre-assembled, sealed, filled, and pressure pump leakage test after filling in the factory, and the pressure transmitter is pre-assembled into two parts that meet the requirements in the factory and then transported to the site, and the two parts of the separation component 32 are installed and docked on site to complete the entire pressure transmitter assembly work.

[0098] It is worth noting that the size of the portion of the separation component 32 close to the side of the containment shell 6 is slightly smaller than the hole opened on the containment shell 6, or slightly smaller than the through pipe 60 opened on the containment shell 6, so that this portion of the separation component 32 can be passed from the inside to the outside through the above-mentioned hole or through pipe 60 to facilitate installation.

[0099] Therefore, the present invention solves the problem that the existing pressure transmitter for containment is inconvenient to install, detect and use on site, and can avoid the uncertainty risk in process implementation caused by the on-site installation and filling of pressure conducting fluid for containment.

[0100] See also Figure 1 and Figure 2 In some embodiments of the present invention, the in-shell module 1 includes: a first capillary tube 11; a base, one end of which is provided with a pressure port 120, and the other end is connected to the first capillary tube 11, the pressure port 120 can be connected to the interior of the containment shell 6, and the end of the first capillary tube 11 away from the base is connected to the out-shell module 3; a pressure measuring diaphragm 121, which is accommodated in the base and isolated between the first capillary tube 11 and the pressure port 120.

[0101] See also Figure 2 In some embodiments of the present invention, the in-shell module 1 further includes a first oil-filling pipe 122 , which is disposed on a side of the pressure measuring diaphragm 121 away from the pressure taking port 120 , and is connected to an end of the first capillary tube 11 close to the pressure measuring diaphragm 121 .

[0102] See also Figure 2In some embodiments of the present invention, the base includes: a diaphragm seat 123 connected to each other, which is penetrated by the first capillary 11 and the first oil-filled tube 122 respectively; a head cover 124, which is provided with the pressure taking port 120; wherein the pressure measuring diaphragm 121 is arranged between the diaphragm seat 123 and the head cover 124.

[0103] See also Figure 2 In some embodiments of the present invention, the base further includes a bolt 125 and a nut 126 , wherein the bolt 125 passes through the diaphragm seat 123 and the head cover 124 , and the diaphragm seat 123 and the head cover 124 are fixed by the bolt 125 and the nut 126 .

[0104] See also Figure 2 In some embodiments of the present invention, the base further includes a sealing gasket 127 , which is in an annular shape and is disposed between the diaphragm seat 123 and the head cover 124 , and the pressure measuring diaphragm 121 is located in a circular vacant area of ​​the annular sealing gasket 127 .

[0105] See also Figure 1 and Figure 3 In some embodiments of the present invention, the shell-penetrating module 2 includes a through-tube body 20, which is suitable for being accommodated in a through-pipe 60 of the containment shell 6, one end of which is connected to the first capillary tube 11, and the other end is connected to the shell-outside module 3. It is worth noting that the size of the through-tube body 20 is slightly smaller than that of the through-pipe 60, so that the partially filled pressure transmitter can pass through the through-pipe 60 from the inside to the outside to complete the installation. The through-tube body 20 and the through-pipe 60 can be sealed and fixed by filling cement or welding.

[0106] See also Figures 1 to 8 In some embodiments of the present invention, the outer shell module 3 includes a second capillary 31 , a separation component 32 and a third capillary 33 , and the separation component 32 is connected between the second capillary 31 and the third capillary 33 .

[0107] In some embodiments, the first capillary tube 11 and the second capillary tube 31 may be the same capillary tube, and the entire capillary tube is penetrated in the through-tube body 20 .

[0108] See also Figures 1 to 8 In some embodiments of the present invention, the outer circumferences of the first capillary tube 11, the second capillary tube 31 and the third capillary tube 33 are all sheathed with armored metal tubes to protect the fragile capillaries.

[0109] See also Figures 4 to 8In some embodiments of the present invention, the separation component 32 includes: a first connecting member 321, which is connected to the second capillary 31; a first diaphragm 322, which is arranged at the end of the first connecting member 321 away from the second capillary 31 and is connected to the second capillary 31; a second connecting member 323, which is detachably connected to the first connecting member 321 and is connected to the third capillary 33; a second diaphragm 324, which is arranged at the end of the second connecting member 323 away from the third capillary 33 and is connected to the third capillary 33; wherein the first diaphragm 322 and the second diaphragm 324 are in contact with each other or are pressure-transmitted via the pressure-transmitting structure 5. It is worth mentioning that the above-mentioned separation component 32 has two detachably connected parts, one part of which is composed of the above-mentioned first connecting member 321 and the first diaphragm 322, and the other part is composed of the above-mentioned second connecting member 323 and the second diaphragm 324, and the first connecting member 321 and the second connecting member 323 are in a detachable connection relationship, which is convenient for installation, disassembly and subsequent maintenance.

[0110] The remote transmission split structure of the pressure transmitter provided by the present invention, that is, the design of the above three modules and the design of the separation component 32, can be used on site. Figure 1 and Fig.14 The left side of the separation assembly 32 shown in the figure directly penetrates the containment shell 6, and is directly connected to the right side of the separation assembly 32 and the signal conversion assembly 4 for use, without subsequent assembly and inspection processes, thereby reducing other risk factors on site. The product provided by the present invention does not require on-site silicone oil filling or filling liquid filling processes. The product provided by the present invention can also be easily disassembled and reused during subsequent inspection and maintenance.

[0111] See also Figure 7 and Figure 8 In some embodiments of the present invention, the first connecting member 321 is a nut seat, and the second connecting member 323 is a threaded tube, and the nut seat and the threaded tube are threadedly matched.

[0112] In some embodiments of the present invention, the first connecting member 321 is a threaded tube, and the second connecting member 323 is a nut seat, and the nut seat and the threaded tube are threadably matched.

[0113] In some embodiments of the present invention, the first connecting member 321 and the second connecting member 323 may be detachably connected by means of snap fastening or the like.

[0114] See also Figures 3 to 6In some embodiments of the present invention, a protective tube structure is provided on a side of the first connecting member 321 close to the second capillary 31, and a side of the second connecting member 323 close to the third capillary 33; one end of the armored metal tube sleeved on the outer periphery of the second capillary 31 is accommodated in the protective tube structure on a side of the first connecting member 321 close to the second capillary 31, and one end of the armored metal tube sleeved on the outer periphery of the third capillary 33 is accommodated in the protective tube structure on a side of the second connecting member 323 close to the third capillary 33.

[0115] See also Figure 1 In some embodiments of the present invention, the signal conversion component includes: a first differential pressure transmitter 41, having a second oil-filled tube 410; a second differential pressure transmitter 42, having a third oil-filled tube 420; a three-way tube 43, a first tube end 431 connected to the first differential pressure transmitter 41, a second tube end 432 connected to the second differential pressure transmitter 42, and a third tube end 433 connected to the third capillary tube 33; wherein the first differential pressure transmitter 41 and the second differential pressure transmitter 42 have different measuring ranges. The pressure transmitter provided by the present invention can use differential pressure transmitters with different ranges, and can provide pressure parameter measurement for normal operation of the containment, and can also be a pressure warning for abnormal operation of the containment. Specifically: in some embodiments, the range of the first differential pressure transmitter 41 is relatively small, generally -50kPa~50kPa, which is suitable for pressure detection of normal operation inside the containment 6, and the range of the second differential pressure transmitter 42 is relatively large, generally 0MPa~2MPa, which is suitable for abnormal pressure detection and early warning values ​​when an accident occurs inside the containment 6; in daily life, the pressure range value inside the containment 6 is -50~50kpa, and is measured using the first differential pressure transmitter 41; when an accident occurs inside the containment 6, the pressure inside the containment 6 rises, which may be close to 2MPa, exceeding the measurement range of the first differential pressure transmitter 41 and overloading, and the output current value is 21.6mA, which is a saturated current, and the second differential pressure transmitter 42 is suitable for pressure detection when an abnormal accident occurs inside the containment 6.

[0116] In some embodiments of the present invention, the first capillary 11 , the second capillary 31 and the third capillary 33 are all provided with a filling liquid, and the filling liquid is benzyl silicone oil with good radiation resistance and good pressure conducting ability.

[0117] See also Fig. 9 In some embodiments of the present invention, the pressure transmission component 5 is a pressure-conducting diaphragm, and the pressure-conducting diaphragm is disposed between the first diaphragm 322 and the second diaphragm 324 .

[0118] See also Figures 10 to 13In some embodiments of the present invention, the pressure transmission component 5 includes: a diaphragm 51, which is suitable for being fitted between the first diaphragm 322 and the second diaphragm 324; and a base 52, which is fixedly connected to the periphery of the diaphragm 51.

[0119] See also Fig. 9 In some embodiments of the present invention, the base 52 is annular, and the periphery of the diaphragm 51 is fixedly connected to the edge of the base 52 . When in use, when the first connecting piece 321 is a nut seat and the second connecting piece 323 is a threaded tube, or when the first connecting piece 321 is a threaded tube and the second connecting piece 323 is a nut seat, the annular base 52 can be placed in the nut seat, and then the threaded tube is screwed in, so that the diaphragm on the nut seat, the diaphragm 51 of the pressure transmission assembly 5 and the diaphragm on the threaded tube, that is, the three diaphragms are in close contact; when the internal pressure of the containment shell 6 is too large until it impacts the pressure measuring diaphragm 121 of the module 11 in the shell, causing the pressure measuring diaphragm 121 to be damaged, the measured medium inside the containment shell 6 may diffuse along the first capillary 11 to the first diaphragm 322 in the first connecting piece 321, and the huge pressure mutation may cause a chain damage to the first diaphragm 322. When the first diaphragm 322 is damaged, the measured medium may further overflow and contaminate or even continue to impact the second diaphragm 324 located on the second connecting piece 323; and the pressure transmission assembly 5 provided by the present invention can act as a barrier to protect the second diaphragm 324.

[0120] See also Fig.10 and Fig.11 In some embodiments of the present invention, the base 52 is tubular, and the periphery of the diaphragm 51 is welded to the flange on the inner wall of the base 52. Specifically, during manufacturing, a flange arranged along the tubular annular direction can be processed on the inner wall of the tubular base 52 to facilitate welding and fixing the periphery of the diaphragm 51 to the annular flange.

[0121] See also Fig.12 and Fig.13 In some embodiments of the present invention, the base 52 is tubular and is fixedly connected to the port of the base 52.

[0122] See also Figures 11 to 13 In some embodiments of the present invention, the number of the diaphragms 51 of the pressure transmission component 5 is two, one diaphragm 51 is in contact with the first diaphragm 322, and the other diaphragm 51 is in contact with the second diaphragm 324. The two diaphragms 51 and the base 52 together enclose a sealed cavity, and the sealed cavity contains a pressure transmission medium. It is understandable that an oil injection hole can be opened at the position of the base 52 between the two diaphragms 51 to inject the pressure transmission medium into the sealed cavity.

[0123] See also Fig.13In some embodiments of the present invention, the first connecting member 321 is a nut seat and the first diaphragm 322 is provided inside, the second connecting member 323 is a threaded tube and the second diaphragm 324 is provided inside, the pressure transmission component 5 is arranged in the nut seat and is located between the first diaphragm 322 and the second diaphragm 324, and the threaded tube is threadedly locked with the nut seat to fix the pressure transmission component 5 in the nut seat.

[0124] In some embodiments of the present invention, the first connecting member 321 is a threaded tube and has the first diaphragm 322 inside, the second connecting member 323 is a nut seat and has the second diaphragm 324 inside, the pressure transmission component 5 is arranged in the nut seat and is located between the first diaphragm 322 and the second diaphragm 324, and the threaded tube is threadedly locked with the nut seat to fix the pressure transmission component 5 in the nut seat.

[0125] In some embodiments of the present invention, the outer wall surface of the base 52 is provided with threads, so that the pressure transmission component 5 is fixed through the outer wall surface of the base 52 and the threaded cooperation of the nut seat.

[0126] See also Fig.10 and Fig.11 In some embodiments of the present invention, the first connecting member 321 and the second connecting member 323 are both threaded tubes, and the base 52 of the pressure transmission component 5 is a nut seat. At this time, the two threaded tubes can be screwed into the nut seat so that the first diaphragm 322 on the first connecting member 321 fits with the diaphragm 51 of the pressure transmission component 5, and the second diaphragm 324 on the second connecting member 323 fits with the diaphragm 51 of the pressure transmission component 5. Fig.10 In some embodiments, there is only one diaphragm 51 in the pressure transmission component 5 in the form of a threaded tube, and in this case, three diaphragms are stacked and attached in sequence; see Fig.11 In some other embodiments, the pressure transmission component 5 in the form of a threaded tube has two diaphragms 51 and a pressure-conducting medium is accommodated between the two diaphragms 51 .

[0127] See also Fig.12 In some embodiments of the present invention, the first connecting member 321 and the second connecting member 323 are both nut seats, and the first diaphragm 322 and the second diaphragm 324 are respectively arranged in one of the nut seats; the outer wall surface of the base 52 of the pressure transmission component 5 is provided with a thread, one end of the pressure transmission component 5 is screwed into one of the nut seats, and the other end is screwed into the other nut seat, so that the first diaphragm 322 and the second diaphragm 324 respectively located on the two nut seats are each in contact with a diaphragm 51 on the pressure transmission component 5.

[0128] See also Fig.12In some embodiments of the present invention, the first connecting member 321 and the second connecting member 323 are both two threaded tubes, and the first diaphragm 322 and the second diaphragm 324 are respectively arranged in one of the threaded tubes; the inner wall surface of the base 52 of the pressure transmission component 5 is provided with threads, and one end of the pressure transmission component 5 is screwed into one of the threaded tubes, and the other end is screwed into the other threaded tube.

[0129] See also Fig.12 In some embodiments of the present invention, the first connecting member 321 and the second connecting member 323 are both threaded tubes, and the first diaphragm 322 and the second diaphragm 324 are respectively arranged in one of the threaded tubes; the pressure transmission component 5 is a nut seat, and the two ends of the pressure transmission component 5 are respectively screwed into one of the threaded tubes, so that the first diaphragm 322 and the second diaphragm 324 respectively located on the two threaded tubes can fit with the two diaphragms 51 on the pressure transmission component 5 in the form of a nut seat.

[0130] See also Fig.13 In some embodiments of the present invention, for a tubular base 52 and two end surfaces of the base 52 in the longitudinal direction are respectively provided with a diaphragm 51, when in use, when the first connecting member 321 is a nut seat and the second connecting member 323 is a threaded tube, or when the first connecting member 321 is a threaded tube and the second connecting member 323 is a nut seat, the annular base 52 can be placed in the nut seat, and then the threaded tube is screwed in, so that the diaphragm on the nut seat, the diaphragm 51 of the pressure transmission component 5 and the diaphragm on the threaded tube, that is, the three diaphragms are in close contact; when the internal pressure of the containment 6 is If the pressure is too large to impact the pressure measuring diaphragm 121 of the module 11 in the shell, the pressure measuring diaphragm 121 will be damaged. The measured medium inside the containment 6 may diffuse along the first capillary 11 to the first diaphragm 322 in the first connector 321. The huge pressure mutation may damage the first diaphragm 322 in a chain. When the first diaphragm 322 is damaged, the measured medium may further overflow and contaminate or even continue to impact the second diaphragm 324 located on the second connector 323. The pressure transmission component 5 provided by the present invention can act as a barrier to protect the second diaphragm 324. In some embodiments, a thread can be provided on the outer peripheral surface of the base 52 so that the pressure transmission component 5 is fixed through the base 52 and the nut seat-shaped connector thread.

[0131] 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 transmitter for detecting the internal pressure of a containment vessel (6) of a nuclear power plant, characterized in that: The pressure transmitter comprises: An in-shell module (1) is suitable for being arranged inside the containment shell (6) and is used to detect the internal pressure of the containment shell (6); an outer shell module (3), adapted to be arranged outside the containment shell (6), for receiving the pressure signal measured by the inner shell module (1) and converting it into an electrical signal, wherein the outer shell module (3) comprises a signal conversion component (4); A shell penetration module (2) is adapted to be arranged to penetrate the containment shell (6), and the shell penetration module (2) is connected between the inner shell module (1) and the outer shell module (3); Wherein, any one of the outer shell module (3) or the shell-penetrating module (2) comprises a separation component (32), and the separation component (32) comprises two parts that are detachably connected to each other, one part of which is connected to the signal conversion component (4), and the other part is connected to the shell-penetrating module (2) or is integrally formed with the shell-penetrating module (2).

2. The pressure transmitter according to claim 1, characterized in that: The in-shell module (1) comprises: A first capillary tube (11); A base, one end of which is provided with a pressure port (120), and the other end of which is connected to the first capillary tube (11), wherein the pressure port (120) can be connected to the interior of the containment shell (6), and the end of the first capillary tube (11) facing away from the base is connected to the outer shell module (3); The pressure measuring diaphragm (121) is accommodated in the base and isolated between the first capillary tube (11) and the pressure taking port (120).

3. The pressure transmitter according to claim 2, characterized in that: The in-shell module (1) further comprises a first oil-filling pipe (122), which is arranged on a side of the pressure measuring diaphragm (121) away from the pressure taking port (120) and is connected to an end of the first capillary tube (11) close to the pressure measuring diaphragm (121).

4. The pressure transmitter according to claim 3, characterized in that: The base comprises interconnected: The diaphragm seat (123) is penetrated by the first capillary tube (11) and the first oil-filled tube (122) respectively; A head cover (124) is provided with the pressure taking port (120); Wherein, the pressure measuring diaphragm (121) is arranged between the diaphragm seat (123) and the head cover (124).

5. The pressure transmitter according to claim 4, characterized in that: The base further comprises a bolt (125) and a nut (126), wherein the bolt (125) passes through the diaphragm seat (123) and the head cover (124), and the diaphragm seat (123) and the head cover (124) are fixed by means of the bolt (125) and the nut (126).

6. The pressure transmitter according to claim 4, characterized in that: The base further comprises a sealing gasket (127) which is in an annular shape and is arranged between the diaphragm seat (123) and the head cover (124). The pressure measuring diaphragm (121) is located in a circular vacant area of ​​the annular sealing gasket (127).

7. The pressure transmitter according to claim 2, characterized in that: The through-shell module (2) comprises a through-tube body (20), which is suitable for being accommodated in a through-pipe (60) of the containment shell (6), one end of the through-tube body (20) being connected to the first capillary tube (11), and the other end of the through-tube body (20) being connected to the outer-shell module (3).

8. The pressure transmitter according to claim 7, characterized in that: The outer shell module (3) comprises a second capillary tube (31), a separation component (32) and a third capillary tube (33), wherein the separation component (32) is connected between the second capillary tube (31) and the third capillary tube (33).

9. The pressure transmitter according to claim 8, characterized in that: The outer circumferences of the first capillary tube (11), the second capillary tube (31) and the third capillary tube (33) are all sheathed with armored metal tubes.

10. The pressure transmitter according to claim 9, characterized in that: The separation assembly (32) comprises: A first connecting member (321) connected to the second capillary tube (31); A first diaphragm (322) is provided at one end of the first connecting member (321) away from the second capillary tube (31) and is connected to the second capillary tube (31); A second connecting member (323) is detachably connected to the first connecting member (321) and is in communication with the third capillary tube (33); A second diaphragm (324) is provided at an end of the second connecting member (323) away from the third capillary tube (33) and is in communication with the third capillary tube (33); The first diaphragm (322) and the second diaphragm (324) are fitted together or transmit pressure via a pressure transmission component (5).

11. The pressure transmitter according to claim 10, characterized in that: The pressure transmission component (5) is a pressure-conducting diaphragm, and the pressure-conducting diaphragm is arranged between the first diaphragm (322) and the second diaphragm (324); Alternatively, the pressure transmission component (5) comprises: A membrane (51) adapted to be disposed between the first membrane (322) and the second membrane (324); The base (52) is fixedly connected to the periphery of the diaphragm (51).

12. The pressure transmitter according to claim 11, characterized in that: The base (52) is annular, and the periphery of the diaphragm (51) is fixedly connected to the edge of the base (52).

13. The pressure transmitter according to claim 11, characterized in that: The base (52) is tubular, and the periphery of the diaphragm (51) is welded to a flange on the inner wall surface of the base (52), and / or is fixedly connected to a port of the base (52).

14. The pressure transmitter according to claim 13, characterized in that: The number of diaphragms (51) of the pressure transmission component (5) is two, one diaphragm (51) is in contact with the first diaphragm (322), and the other diaphragm (51) is in contact with the second diaphragm (324), and the two diaphragms (51) and the base (52) together enclose a sealed cavity, and the sealed cavity contains a pressure transmission medium.

15. The pressure transmitter according to any one of claims 12 to 14, characterized in that: The first connecting member (321) is a nut seat and has the first diaphragm (322) disposed therein; the second connecting member (323) is a threaded tube and has the second diaphragm (324) disposed therein; the pressure transmission component (5) is disposed in the nut seat and is located between the first diaphragm (322) and the second diaphragm (324); the threaded tube is thread-locked with the nut seat so that the pressure transmission component (5) is fixed in the nut seat; Alternatively, the first connecting member (321) is a threaded tube and has the first diaphragm (322) disposed therein, the second connecting member (323) is a nut seat and has the second diaphragm (324) disposed therein, the pressure transmission component (5) is disposed in the nut seat and is located between the first diaphragm (322) and the second diaphragm (324), the threaded tube and the nut seat are threadedly locked so that the pressure transmission component (5) is fixed in the nut seat.

16. The pressure transmitter according to claim 15, characterized in that: The outer wall surface of the base (52) is provided with threads, so that the pressure transmission component (5) can be fixed by threading with the nut seat via the outer wall surface of the base (52).

17. The pressure transmitter according to any one of claims 12 to 14, characterized in that: The first connecting member (321) and the second connecting member (323) are both nut seats, and the first diaphragm (322) and the second diaphragm (324) are respectively arranged in one of the nut seats; The outer wall surface of the base (52) of the pressure transmission component (5) is provided with threads, and one end of the pressure transmission component (5) is screwed into one of the nut seats, and the other end is screwed into the other of the nut seats.

18. The pressure transmitter according to any one of claims 12 to 14, characterized in that: The first connecting member (321) and the second connecting member (323) are both two threaded tubes, and the first diaphragm (322) and the second diaphragm (324) are respectively arranged in one of the threaded tubes; The inner wall surface of the base (52) of the pressure transmission component (5) is provided with threads, and one end of the pressure transmission component (5) is screwed into one of the threaded tubes, and the other end is screwed into another of the threaded tubes.

19. The pressure transmitter according to claim 10, characterized in that: The first connecting member (321) is a nut seat, the second connecting member (323) is a threaded tube, and the nut seat and the threaded tube are threadably matched; Alternatively, the first connecting member (321) is a threaded pipe, and the second connecting member (323) is a nut seat, and the nut seat and the threaded pipe are threadably matched.

20. The pressure transmitter according to claim 10, characterized in that: A protective tube structure is provided on a side of the first connecting member (321) close to the second capillary tube (31), and a side of the second connecting member (323) close to the third capillary tube (33); One end of the armored metal tube sleeved around the outer periphery of the second capillary tube (31) is accommodated in the protective tube structure on the side of the first connecting piece (321) close to the second capillary tube (31), and one end of the armored metal tube sleeved around the outer periphery of the third capillary tube (33) is accommodated in the protective tube structure on the side of the second connecting piece (323) close to the third capillary tube (33).

21. The pressure transmitter according to claim 9, characterized in that: The signal conversion component (4) comprises: A first differential pressure transmitter (41) having a second oil-filled pipe (410); A second differential pressure transmitter (42) having a third oil-filled pipe (420); A three-way pipe (43), wherein the first pipe end (431) is connected to the first differential pressure transmitter (41), the second pipe end (432) is connected to the second differential pressure transmitter (42), and the third pipe end (433) is connected to the third capillary tube (33); The first differential pressure transmitter (41) and the second differential pressure transmitter (42) have different measuring ranges.

22. The pressure transmitter according to claim 9, characterized in that: The first capillary (11), the second capillary (31) and the third capillary (33) are all provided with a filling liquid, and the filling liquid is benzyl silicone oil.

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