Pressure transmitter

Abstract

The utility model provides a pressure transmitter, which is used for detecting the internal pressure of a containment of a nuclear power station, 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, the problem that the existing pressure transmitter for the containment is inconvenient to install and use on site is solved, and the uncertain risk of process implementation caused by the fact that the pressure transmitter for the containment is installed on site and filled with pressure guide liquid can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear power plant containment pressure monitoring technical field, concretely relates to a pressure transmitter. BACKGROUND

[0002] Nuclear power plant containment is a kind of prestressed concrete thick-walled container with inner lining steel plate, and top is semispherical.Containment is completely sealed from external environment to prevent and limit fissile radioactive material diffusion after reactor accident, and public is protected from the harm of radioactive material.Reactor safe operation and abnormal accident state are closely related to the pressure change in containment, and daily pressure detection is extremely important.

[0003] At present, the pressure transmitter for containment pressure measurement mainly uses remote diaphragm sealing device with capillary oil filling type to measure pressure.Diaphragm sealing device is placed in containment, and transmitter body is placed outside containment, and they are connected by oil-filled capillary tube, and due to the sealing surface requirement of containment, capillary tube can only be connected through the penetration pipe of containment.

[0004] However, the above scheme has the following problems to be solved: 1, the transmitter needs to be separated from each other during manufacturing, and the pressure diaphragm box and the differential pressure transmitter are generally connected or disconnected by capillary thread, and the capillary thread is connected after penetrating the containment in the field; 2, after connection, the sealed cavity needs to be checked, and the sealed cavity refers to the area for accommodating the pressure guide medium, including the space inside the capillary tube, and the oil is filled after checking the sealing property, and the pressure leakage detection needs to be carried out after filling the oil; 3, in addition, the on-site silicon oil filling also involves special mobile filling equipment, and the on-site filling process is not convenient to control, which brings performance risk of the instrument. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of pressure transmitter, to solve the problems, such as inconvenient installation and use of existing containment pressure transmitter in the field, which can avoid the uncertainty risk of process implementation caused by on-site installation and filling of pressure guide liquid of containment pressure transmitter.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] A kind of pressure transmitter for detecting the internal pressure of nuclear power plant containment, the pressure transmitter includes:

[0008] Shell-in module, suitable for being located in the inside of the containment, to detect the internal pressure of the containment;

[0009] an out-of-shell module adapted to be disposed outside the containment shell for receiving the pressure signal measured by the in-shell module and converting it into an electrical signal, wherein the out-of-shell module comprises a signal conversion assembly;

[0010] a through-shell module adapted to be disposed through the containment shell, the through-shell module being connected between the in-shell module and the out-of-shell module;

[0011] wherein any one of the out-of-shell module or the through-shell module comprises a separation assembly comprising two parts detachably connected to each other, one part being connected to the signal conversion assembly and the other part being connected to the through-shell module or being integrally formed with the through-shell module.

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

[0013] a first capillary tube;

[0014] a base having one end provided with a pressure tapping port and the other end being in communication with the first capillary tube, the pressure tapping port being capable of being in communication with the interior of the containment shell, and the first capillary tube having one end away from the base being in communication with the out-of-shell module;

[0015] a pressure measuring diaphragm accommodated in the base and being isolated between the first capillary tube and the pressure tapping port.

[0016] In some embodiments of the present application, the in-shell module further comprises a first oil filling tube, the first oil filling tube being disposed on the side of the pressure measuring diaphragm away from the pressure tapping port and being in communication with one end of the first capillary tube close to the pressure measuring diaphragm.

[0017] In some embodiments of the present application, the base comprises:

[0018] a diaphragm seat being penetrated by the first capillary tube and the first oil filling tube respectively;

[0019] a head cover provided with the pressure tapping port;

[0020] wherein the pressure measuring diaphragm is disposed between the diaphragm seat and the head cover.

[0021] In some embodiments of the present application, the base further comprises a bolt and a nut, the bolt penetrating the diaphragm seat and the head cover, and the diaphragm seat and the head cover being fixed by the bolt and the nut.

[0022] In some embodiments of the present application, the base further comprises a sealing gasket, the sealing gasket being annular and being disposed between the diaphragm seat and the head cover, and the pressure measuring diaphragm being located in a circular hollow area of the annular sealing gasket.

[0023] In some embodiments of the utility model, the shell penetrating module comprises a penetrating pipe body, the penetrating pipe body is suitable for being accommodated in the penetrating pipeline of the containment shell, one end of the penetrating pipe body is communicated with the first capillary tube, and the other end is communicated with the shell outer module.

[0024] In some embodiments of the utility model, the shell outer module comprises a second capillary tube, a separation assembly and a third capillary tube, and the separation assembly is communicated between the second capillary tube and the third capillary tube.

[0025] In some embodiments of the utility model, the outer periphery of the first capillary tube, the second capillary tube and the third capillary tube is sleeved with an armored metal pipe.

[0026] In some embodiments of the utility model, the separation assembly comprises:

[0027] A first connecting piece is communicated with the second capillary tube.

[0028] A first diaphragm is arranged at one end of the first connecting piece away from the second capillary tube and is communicated with the second capillary tube.

[0029] A second connecting piece is detachably connected with the first connecting piece and is communicated with the third capillary tube.

[0030] A second diaphragm is arranged at one end of the second connecting piece away from the third capillary tube and is communicated with the third capillary tube.

[0031] The first diaphragm and the second diaphragm are attached or are transmitted by a pressure transmission assembly.

[0032] In some embodiments of the utility model, the pressure transmission assembly is a pressure guide diaphragm, and the pressure guide diaphragm is attached between the first diaphragm and the second diaphragm.

[0033] Alternatively, the pressure transmission assembly comprises:

[0034] A diaphragm is suitable for being attached between the first diaphragm and the second diaphragm.

[0035] A base body is fixedly connected with the periphery of the diaphragm.

[0036] In some embodiments of the utility model, the base body is annular, and the periphery of the diaphragm is fixedly connected with the edge of the base body.

[0037] In some embodiments of the utility model, the base body is tubular, the periphery of the diaphragm is welded with a flange on the inner wall surface of the base body, and / or is fixedly connected with the port of the base body.

[0038] The number of diaphragms of the pressure transmission assembly is two, one diaphragm is attached to the first diaphragm, and the other diaphragm is attached to the second diaphragm, the two diaphragms and the base body jointly enclose a sealed cavity, and the sealed cavity contains a pressure transmission medium.

[0039] In some embodiments of the utility model, the first connecting piece is a nut seat and internally provided with the first diaphragm, the second connecting piece is a threaded pipe and internally provided with the second diaphragm, the pressure transmission assembly is arranged in the nut seat and located between the first diaphragm and the second diaphragm, and the threaded pipe is threadedly locked with the nut seat so as to fix the pressure transmission assembly in the nut seat.

[0040] Alternatively, the first connecting piece is a threaded pipe and internally provided with the first diaphragm, the second connecting piece is a nut seat and internally provided with the second diaphragm, the pressure transmission assembly is arranged in the nut seat and located between the first diaphragm and the second diaphragm, and the threaded pipe is threadedly locked with the nut seat so as to fix the pressure transmission assembly in the nut seat.

[0041] In some embodiments of the utility model, the outer wall surface of the base body is provided with threads so as to threadedly cooperate and fix the pressure transmission assembly with the nut seat via the outer wall surface of the base body.

[0042] In some embodiments of the utility model, the first connecting piece and the second connecting piece are both nut seats, and the first diaphragm and the second diaphragm are arranged in one nut seat respectively.

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

[0044] In some embodiments of the utility model, the first connecting piece and the second connecting piece are both two threaded pipes, and the first diaphragm and the second diaphragm are arranged in one threaded pipe respectively.

[0045] The inner wall surface of the base body of the pressure transmission assembly is provided with threads, one end of the pressure transmission assembly is screwed into one threaded pipe, and the other end is screwed into another threaded pipe.

[0046] In some embodiments of the utility model, the first connecting piece is a nut seat, the second connecting piece is a threaded pipe, and the nut seat and the threaded pipe are threadedly cooperated.

[0047] Alternatively, the first connecting piece is a threaded pipe, the second connecting piece is a nut seat, and the nut seat and the threaded pipe are threadedly cooperated.

[0048] In some embodiments of the utility model, one side of the first connecting piece close to the second capillary and one side of the second connecting piece close to the third capillary 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 is accommodated in the protective tube structure on the side of the first connecting piece close to the second capillary, and one end of the armored metal tube sleeved on the outer periphery of the third capillary is accommodated in the protective tube structure on the side of the connecting piece close to the third capillary.

[0050] In some embodiments of the utility model, the signal conversion assembly comprises:

[0051] The first differential pressure transmitter has a second oil filling pipe.

[0052] The second differential pressure transmitter has a third oil filling pipe.

[0053] The tee pipe has a first pipe end connected with the first differential pressure transmitter, a second pipe end connected with the second differential pressure transmitter, and a third pipe end connected with the third capillary.

[0054] The first differential pressure transmitter and the second differential pressure transmitter have different ranges.

[0055] In some embodiments of the utility model, the first capillary, the second capillary and the third capillary are all filled with a filling liquid, and the filling liquid is benzyl silicone oil.

[0056] Other applicable fields will become apparent from the description provided in the present disclosure.

[0057] The description and specific examples in the utility model content are only intended for illustration and are not intended to limit the scope of the present disclosure.

[0058] Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

[0059] 1. The utility model provides a pressure transmitter which can be used for measuring the internal pressure of a safety shell of a nuclear power plant, the pressure transmitter comprises an in-shell module located in the safety shell, a shell-penetrating module capable of penetrating the safety shell, and an out-shell module located outside the safety shell, the in-shell module measures the internal pressure of the safety shell, the pressure is transmitted to the out-shell module through the shell-penetrating module, and the pressure signal is converted into an electric signal;

[0060] 2. The utility model solves the problem of inconvenient installation and use of the existing pressure transmitter for the safety shell, and can avoid the uncertainty risk in process implementation caused by the installation and filling of the pressure-conducting liquid of the pressure transmitter for the safety shell on site;

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

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

[0063] 5. The product provided by this utility model can be easily disassembled and reused during subsequent inspection and maintenance;

[0064] 6. The product provided by this utility model can use differential pressure transmitter bodies with different ranges, which can provide pressure parameter measurement for normal operation of the containment, and can also provide pressure warning for abnormal operation of the containment. Attached Figure Description

[0065] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some implementation schemes of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0066] Figure 1 A schematic diagram of the structure of a pressure transmitter installed on the containment vessel of a nuclear power plant, as provided in the first embodiment of this utility model;

[0067] Figure 2 for Figure 1 A cross-sectional view of the internal modules within the shell;

[0068] Figure 3 for Figure 1 A cross-sectional view of the shell-penetrating module, as well as some of the internal and external shell modules.

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

[0072] Figure 7 for Figure 6 A cross-sectional view of the first connector in the process;

[0073] Figure 8 for Figure 6 A cross-sectional view of the second connector in the middle;

[0074] Figure 9 Structure diagram of pressure transmission assembly provided for the second embodiment of the utility model;

[0075] Figure 10 Structure diagram of pressure transmission assembly provided for the third embodiment of the utility model;

[0076] Figure 11 Structure diagram of pressure transmission assembly provided for the fourth embodiment of the utility model;

[0077] Figure 12 Structure diagram of pressure transmission assembly provided for the fifth embodiment of the utility model;

[0078] Figure 13 Structure diagram of pressure transmission assembly provided for the sixth embodiment of the utility model;

[0079] Figure 14 Structure diagram of pressure transmitter installed on the containment of nuclear power plant provided for the seventh embodiment of the utility model.

[0080] Explanation of reference signs

[0081] 1 - in-shell module; 11 - first capillary tube; 120 - pressure tapping; 121 - pressure measuring diaphragm; 122 - first oil filling tube; 123 - diaphragm seat; 124 - head cover; 125 - bolt; 126 - nut; 127 - gasket;

[0082] 2 - through-shell module; 20 - through pipe body; 21 - protective tube on the through pipe body;

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

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

[0085] 5 - pressure transmission assembly; 51 - diaphragm; 52 - base body;

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

[0087] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application. It should be understood that the specific implementation described herein is only used to illustrate and explain the present application, and is not used to limit the present application.

[0088] Any specific numerical values (including the endpoints of any numerical range) disclosed herein are not to be construed as limiting, but rather as approximations. Any numerical value, however, can contain certain errors associated with testing measurements and / or measurement error inherent in the art of making and using the compositions and methods disclosed herein. Rounding errors and other errors can be included in the numerical values. Moreover, any numerical range recited herein is intended to include all sub-ranges subsumed therein. For example, a range of "1 to 10" is intended to include all sub-ranges between and including the recited minimum value of 1 and the recited maximum value of 10, that is, all subranges beginning with a minimum value equal to or greater than 1 and ending with a maximum value equal to or less than 10, as well as all intermediate ranges. As stated above, any numerical value can contain certain errors associated with testing measurements and / or measurement error inherent in the art of making and using the compositions and methods disclosed herein. Rounding errors and other errors can be included in the numerical values. Moreover, any numerical range recited herein is intended to include all sub-ranges subsumed therein. For example, a range of "1 to 10" is intended to include all sub-ranges between and including the recited minimum value of 1 and the recited maximum value of 10, that is, all sub-ranges beginning with a minimum value equal to or greater than 1 and ending with a maximum value equal to or less than 10, as well as all intermediate ranges. As stated above, any numerical value can contain certain errors associated with testing measurements and / or measurement error inherent in the art of making and using the compositions and methods disclosed herein. Rounding errors and other errors can be included in the numerical values. Moreover, any numerical range recited herein is intended to include all sub-ranges subsumed therein. For example, a range of "1 to 10" is intended to include all sub-ranges between and including the recited minimum value of 1 and the recited maximum value of 10, that is, all sub-ranges beginning with a minimum value equal to or greater than 1 and ending with a maximum value equal to or less than 10, as well as all intermediate ranges.

[0089] The terminology used by the present disclosure is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, integers, compositions, steps, operations, elements, components, and / or groups but do not preclude the presence or addition of one or more other features, integers, compositions, steps, operations, elements, components, and / or groups thereof. Although the open term "comprising", as to be understood in the art, is to be taken to be a non-limiting term specific to describe and claim various embodiments of the present disclosure, in certain aspects, the term is instead to be taken as a more limiting and restrictive term, such as "consisting of" or "consisting essentially of". As such, for any given embodiment reciting a composition, material, component, element, feature, integer, operation, and / or process step the present disclosure also specifically includes embodiments in which essentially corresponding compositions, materials, components, elements, features, integers, operations, and / or process steps are substituted therefor, whether such embodiments are listed in the detailed description or not. In the case of "consisting of", alternative embodiments are excluded from the embodiment, while in the case of "consisting essentially of", any additional compositions, materials, components, elements, features, integers, operations, and / or process steps are not excluded from the embodiment, provided that such additional compositions, materials, components, elements, features, integers, operations, and / or process steps do not substantially change the basic and novel characteristics of the claimed embodiments.

[0090] Any method steps, processes, and operations described in the present disclosure should not be construed to necessarily require their performance in the particular order discussed or illustrated, unless explicitly stated otherwise. It is also to be understood that additional or alternative steps can be employed, unless otherwise stated.

[0091] In the present application, except for the explicitly stated content, any matter or issue not mentioned is directly applicable to those known in the art without any change. Moreover, any embodiment described in the present disclosure can be freely combined with one or more other embodiments described in the present disclosure, and the technical solutions or technical ideas formed thereby are considered as part of the original disclosure or original description of the present application, and should not be considered as new content that has not been disclosed or anticipated by the present disclosure, unless the combination is considered to be obviously unreasonable by those skilled in the art.

[0092] Unless otherwise stated, the terms used herein have the same meaning as generally understood by those skilled in the art. If the term is defined herein and its definition is different from the general understanding of the art, the definition herein shall prevail.

[0093] Referring to Figure 1 The utility model provides a pressure transmitter for detecting the internal pressure of the containment 6 of nuclear power plant, the pressure transmitter includes: the inside module 1 of shell is suitable for being located in the inside of the containment 6, and the inside module 1 is used to detect the internal pressure of the containment 6, the outside module 3 of shell is suitable for being located in the outside of the containment 6, and the outside module 3 is used to receive the pressure signal measured by the inside module 1 and converts into electric signal, wherein the outside module 3 of shell includes signal conversion subassembly 4, the module 2 of going through shell is suitable for being arranged through the containment 6, and the module 2 of going through shell is connected between the inside module 1 of shell and the outside module 3 of shell, any one of the outside module 3 of shell or the module 2 of going through shell includes separation component 32, and the separation component 32 includes two parts that are detachably connected with each other, one part is connected with signal conversion subassembly 4, and the other part is connected with the module 2 of going through shell or is integrally formed with the module 2 of going through shell.

[0094] It can be understood that the two parts of the separation component 32 that are detachably connected with each other can be threadedly connected or connected in other ways.

[0095] Referring to Figure 1 It is worth noting that in some embodiments, the separation component 32 is part of the outside module 3 of shell, and in this case, the part of the separation component 32 that is detachably connected to the module 2 of going through shell is indirectly connected to the module 2 of going through shell via other parts of the outside module 3 of shell. In other embodiments, the part of the separation component 32 that is detachably connected to the module 2 of going through shell is directly connected to the module 2 of going through shell.

[0096] Referring to Figure 14In some embodiments, the separation assembly 32 is part of the shell-penetrating module 2, and in other embodiments, the separation assembly 32 is part of the shell-penetrating module 2, at this time, part of the separation assembly 32 and the shell-penetrating module 2 can be welded or integrally formed, and the other part of the separation assembly 32 is connected with the shell-out module 3.

[0097] It is worth noting that, in the prior art, due to the absence of the separation assembly 32 provided by the present application, the pressure transmitter needs to be sent from the factory to the site to gradually perform operations such as installation, sealing detection, liquid filling, and pressure leakage detection after liquid filling, and many inconveniences will be encountered during on-site installation, and there are many uncertain risks in on-site process implementation; the present application is aimed at this problem, and the above-mentioned separation assembly 32 composed of two detachable parts is provided, so that the pressure transmitter provided by the present application can complete the operations such as assembly, sealing detection, liquid filling, and pressure leakage detection after liquid filling in the factory in advance, and the pressure transmitter is assembled into two parts that meet the requirements in the factory in advance before being transported to the site, and the two parts of the separation assembly 32 are installed and connected on the site to complete the entire pressure transmitter assembly work.

[0098] It is worth noting that the size of the part of the separation assembly 32 close to the safety shell 6 is slightly smaller than the through hole opened on the safety shell 6, or slightly smaller than the through pipeline 60 opened on the safety shell 6, so that the part of the separation assembly 32 is passed from the inside to the outside through the above-mentioned through hole or through pipeline 60, to facilitate installation.

[0099] Therefore, the present application solves the problem of inconvenient installation, detection, and use of the existing safety shell pressure transmitter on site, and can avoid the uncertain risk of process implementation caused by the installation and filling of the pressure guide liquid of the safety shell pressure transmitter on site.

[0100] Referring to Figure 1 and Figure 2 In some embodiments of the present application, the shell-in module 1 comprises: a first capillary tube 11; a base provided with a pressure tapping port 120 at one end and communicated with the first capillary tube 11 at the other end, the pressure tapping port 120 can be communicated with the inside of the safety shell 6, and the end of the first capillary tube 11 away from the base is communicated with the shell-out module 3; and a pressure measuring diaphragm 121 accommodated in the base and isolated between the first capillary tube 11 and the pressure tapping port 120.

[0101] Referring to Figure 2 In some embodiments of the present application, the shell-in module 1 further comprises a first oil filling pipe 122, which is arranged on the side of the pressure measuring diaphragm 121 away from the pressure tapping port 120 and communicated with the end of the first capillary tube 11 close to the pressure measuring diaphragm 121.

[0102] Referring toFigure 2 In some embodiments of the utility model, the base includes mutual connection: diaphragm seat 123, be respectively penetrated by first capillary 11 and first oil filling pipe 122; Head cover 124, be equipped with pressure tapping 120, wherein, the pressure measuring diaphragm 121 is located between diaphragm seat 123 and head cover 124.

[0103] Referring to Figure 2 In some embodiments of the utility model, the base further includes bolt 125 and nut 126, the bolt 125 penetrates diaphragm seat 123 and head cover 124, and the diaphragm seat 123 and head cover 124 are fixed by the bolt 125 and nut 126.

[0104] Referring to Figure 2 In some embodiments of the utility model, the base further includes sealing gasket 127, the sealing gasket 127 is annular, and is located between diaphragm seat 123 and head cover 124, and the pressure measuring diaphragm 121 is located in the circular hollow area of the annular sealing gasket 127.

[0105] Referring to Figure 1 And Figure 3 In some embodiments of the utility model, the shell penetrating module 2 includes a through pipe body 20, the through pipe body 20 is suitable for being accommodated in the through pipeline 60 of the containment vessel 6, one end of the through pipe body 20 is communicated with the first capillary 11, and the other end is communicated with the shell external module 3. It is worth mentioning that the size of the through pipe body 20 is slightly smaller than the size of the through pipeline 60, so that the part of the pressure transmitter that is completed by filling liquid can be penetrated from inside to outside through the through pipeline 60 to complete installation. Wherein, the through pipe body 20 and the through pipeline 60 can be sealed and fixed by filling cement or welding.

[0106] Referring to Figures 1 to 8 In some embodiments of the utility model, the shell external module 3 includes a second capillary 31, a separation assembly 32 and a third capillary 33, and the separation assembly 32 is communicated between the second capillary 31 and the third capillary 33.

[0107] In some embodiments, the first capillary 11 and the second capillary 31 can be the same capillary, and the whole capillary is arranged in the through pipe body 20.

[0108] Referring to Figures 1 to 8 In some embodiments of the utility model, the outer periphery of the first capillary 11, the second capillary 31 and the third capillary 33 is sleeved with an armored metal pipe to protect the fragile capillary.

[0109] Referring to Figures 4 to 8In some embodiments of this utility model, the separation component 32 includes: a first connector 321, which is connected to the second capillary 31; a first diaphragm 322, which is disposed at one end of the first connector 321 away from the second capillary 31 and is connected to the second capillary 31; a second connector 323, which is detachably connected to the first connector 321 and is connected to the third capillary 33; and a second diaphragm 324, which is disposed at one end of the second connector 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 attached together or transmitted pressure via the pressure transmission structure 5. It is worth noting that the separation component 32 described above has two detachable connected parts, one of which is composed of the first connector 321 and the first diaphragm 322, and the other part is composed of the second connector 323 and the second diaphragm 324. The first connector 321 and the second connector 323 are detachably connected, which facilitates installation, disassembly and subsequent maintenance.

[0110] The pressure transmitter provided by this utility model features a remote transmission split structure, namely the design of the above three modules and the design of the separation component 32, which allows for on-site connection of the transmitter to various components. Figure 1 and Figure 14 As shown, the left side of the separation component 32 directly penetrates the containment housing 6 and connects directly to the right side of the separation component 32 and the signal conversion component 4, eliminating the need for subsequent assembly and inspection processes and reducing other risk factors on-site. The product provided by this invention eliminates the need for on-site silicone oil or filler fluid filling processes. Furthermore, the product provided by this invention can be easily disassembled and reused during subsequent inspection and maintenance.

[0111] See Figure 7 and Figure 8 In some embodiments of this utility model, the first connecting member 321 is a nut seat, and the second connecting member 323 is a threaded pipe, wherein the nut seat and the threaded pipe are threadedly engaged.

[0112] In some embodiments of this utility model, the first connector 321 is a threaded pipe, and the second connector 323 is a nut seat, wherein the nut seat and the threaded pipe are threadedly engaged.

[0113] In some embodiments of this utility model, the first connector 321 and the second connector 323 can also be detachably connected by means of snap-fit ​​or other methods.

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

[0115] Referring to Figure 1 In some embodiments of the utility model, the signal conversion assembly comprises: a first differential pressure transmitter 41 provided with a second oil filling pipe 410; a second differential pressure transmitter 42 provided with a third oil filling pipe 420; and a tee pipe 43, a first pipe end 431 of which is in communication with the first differential pressure transmitter 41, a second pipe end 432 of which is in communication with the second differential pressure transmitter 42, and a third pipe end 433 of which is in communication with the third capillary tube 33; wherein the first differential pressure transmitter 41 and the second differential pressure transmitter 42 are different in range size. The pressure transmitter provided by the utility model can use differential pressure transmitters with different ranges, can provide pressure parameter measurement for normal operation of a safety shell, and can also provide pressure warning for abnormal operation of the safety shell. Specifically, in some embodiments, the range of the first differential pressure transmitter 41 is relatively small, generally -50kPa~50kPa, and is suitable for pressure detection of normal operation of the safety shell 6, and the range of the second differential pressure transmitter 42 is relatively large, generally 0MPa~2MPa, and is suitable for abnormal pressure detection and early warning value when an accident occurs in the safety shell 6. In daily life, the pressure range value in the safety shell 6 is -50~50kPa, and the first differential pressure transmitter 41 is used for measurement; when an accident occurs in the safety shell 6, the pressure in the safety shell 6 rises and may be close to about 2MPa, which exceeds the measurement range of the first differential pressure transmitter 41 and overloads, and the output current value is 21.6mA, which is the saturation current, and the second differential pressure transmitter 42 is suitable for pressure detection when an accident occurs in the safety shell 6.

[0116] In some embodiments of the utility model, the first capillary tube 11, the second capillary tube 31 and the third capillary tube 33 are all provided with filling liquid, and the filling liquid is benzyl silicone oil which has good radiation resistance and good pressure guiding capacity.

[0117] Referring to Figure 9 In some embodiments of the utility model, the pressure transmission assembly 5 is a pressure guiding diaphragm, and the pressure guiding diaphragm is arranged between the first diaphragm 322 and the second diaphragm 324.

[0118] Referring to Figures 10 to 13In some embodiments of the utility model, the pressure transmission component 5 comprises: a diaphragm 51, which is adapted to be arranged between the first diaphragm 322 and the second diaphragm 324; and a base 52, which is fixedly connected with the periphery of the diaphragm 51.

[0119] In some embodiments of the utility model, the base 52 is annular, and the periphery of the diaphragm 51 is fixedly connected with the edge of the base 52. Figure 9 When the first connecting piece 321 is a nut seat and the second connecting piece 323 is a threaded pipe, or when the first connecting piece 321 is a threaded pipe 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 pipe 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 pipe, i.e. the three diaphragms, are tightly attached.

[0120] In some embodiments of the utility model, the base 52 is annular, and the periphery of the diaphragm 51 is fixedly connected with the edge of the base 52. Figure 10 Figure 11 In some embodiments of the utility model, the base 52 is tubular, and the periphery of the diaphragm 51 is welded with a flange on the inner wall surface of the base 52.

[0121] In some embodiments of the utility model, the base 52 is tubular, and the periphery of the diaphragm 51 is welded with a flange on the inner wall surface of the base 52. Figure 12 Figure 13 In some embodiments of the utility model, the base 52 is tubular, and the periphery of the diaphragm 51 is welded with a flange on the inner wall surface of the base 52.

[0122] In some embodiments of the utility model, the base 52 is tubular, and the periphery of the diaphragm 51 is welded with a flange on the inner wall surface of the base 52. Figures 11 to 13 In some embodiments of the utility model, the number of diaphragms 51 of the pressure transmission component 5 is two, one diaphragm 51 is attached with the first diaphragm 322, and the other diaphragm 51 is attached with the second diaphragm 324, and the two diaphragms 51 and the base 52 jointly enclose a sealed cavity, and the sealed cavity contains a pressure transmission medium.

[0123] In some embodiments of the utility model, the number of diaphragms 51 of the pressure transmission component 5 is two, one diaphragm 51 is attached with the first diaphragm 322, and the other diaphragm 51 is attached with the second diaphragm 324, and the two diaphragms 51 and the base 52 jointly enclose a sealed cavity, and the sealed cavity contains a pressure transmission medium. Figure 13 ​​In some embodiments of the utility model, the first connecting piece 321 is a threaded pipe and the first diaphragm 322 is arranged inside, the second connecting piece 323 is a nut seat and the second diaphragm 324 is arranged inside, the pressure transmission assembly 5 is arranged in the nut seat and is located between the first diaphragm 322 and the second diaphragm 324, and the threaded pipe is screwed and locked with the nut seat to fix the pressure transmission assembly 5 in the nut seat.

[0124] In some embodiments of the utility model, the first connecting piece 321 is a threaded pipe and the first diaphragm 322 is arranged inside, the second connecting piece 323 is a nut seat and the second diaphragm 324 is arranged inside, the pressure transmission assembly 5 is arranged in the nut seat and is located between the first diaphragm 322 and the second diaphragm 324, and the threaded pipe is screwed and locked with the nut seat to fix the pressure transmission assembly 5 in the nut seat.

[0125] In some embodiments of the utility model, the outer wall surface of the base body 52 is provided with threads to fix the pressure transmission assembly 5 with the nut seat through the outer wall surface of the base body 52.

[0126] Referring to Figure 10 and Figure 11 In some embodiments of the utility model, the first connecting piece 321 and the second connecting piece 323 are both threaded pipes, and the base body 52 of the pressure transmission assembly 5 is a nut seat, so that the two threaded pipes can be screwed into the nut seat to make the first diaphragm 322 on the first connecting piece 321 adhere to the diaphragm 51 of the pressure transmission assembly 5 and make the second diaphragm 324 on the second connecting piece 323 adhere to the diaphragm 51 of the pressure transmission assembly 5. Figure 10 In some embodiments, the pressure transmission assembly 5 in the form of a threaded pipe has only one diaphragm 51, and the three diaphragms are sequentially stacked and adhered. Figure 11 In another embodiment, the pressure transmission assembly 5 in the form of a threaded pipe has two diaphragms 51 and a pressure guide medium is arranged between the two diaphragms 51.

[0127] Referring to Figure 12 In some embodiments of the utility model, the first connecting piece 321 and the second connecting piece 323 are both nut seats, the first diaphragm 322 and the second diaphragm 324 are arranged in one of the nut seats, the outer wall surface of the base body 52 of the pressure transmission assembly 5 is provided with threads, one end of the pressure transmission assembly 5 is screwed into one of the nut seats, the other end is screwed into the other nut seat, and then the first diaphragm 322 and the second diaphragm 324 on the two nut seats respectively adhere to one of the diaphragms 51 on the pressure transmission assembly 5.

[0128] Referring to Figure 12In some embodiments of the utility model, the first connecting piece 321 and the second connecting piece 323 are both two threaded pipes, the first diaphragm 322 and the second diaphragm 324 are respectively arranged in one threaded pipe, the inner wall surface of the base body 52 of the pressure transmission assembly 5 is provided with threads, one end of the pressure transmission assembly 5 is screwed into one threaded pipe, and the other end is screwed into another threaded pipe.

[0129] Referring to Figure 12 In some embodiments of the utility model, the first connecting piece 321 and the second connecting piece 323 are both threaded pipes, the first diaphragm 322 and the second diaphragm 324 are respectively arranged in one threaded pipe, the pressure transmission assembly 5 is a nut seat, and the two ends of the pressure transmission assembly 5 are respectively screwed into one threaded pipe, so that the first diaphragm 322 and the second diaphragm 324 respectively located on the two threaded pipes can be attached to the two diaphragms 51 on the pressure transmission assembly 5 in the form of a nut seat.

[0130] Referring to Figure 13 In some embodiments of the utility model, for the tubular base body 52 and the two end surfaces in the longitudinal direction of the base body 52 are respectively provided with one diaphragm 51, when the first connecting piece 321 is a nut seat and the second connecting piece 323 is a threaded pipe, or when the first connecting piece 321 is a threaded pipe and the second connecting piece 323 is a nut seat, the annular base body 52 can be placed in the nut seat, and then the threaded pipe 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 pipe, that is, the three diaphragms are tightly attached; when the internal pressure of the safety shell 6 is too large to damage the pressure measuring diaphragm 121 of the impact shell module 11, the measured medium in the safety shell 6 may diffuse along the first capillary 11 to the first diaphragm 322 in the first connecting piece 321, and the sudden change of the huge pressure may damage the first diaphragm 322 in a chain, when the first diaphragm 322 is damaged, the measured medium may further overflow and pollute or even continue to impact the second diaphragm 324 on the second connecting piece 323; and the pressure transmission assembly 5 provided by the utility model can play a barrier role to protect the second diaphragm 324. In some embodiments, threads can be arranged on the outer circumferential surface of the base body 52, so that the pressure transmission assembly 5 is fixed by thread cooperation with the nut seat form connecting piece through the base body 52.

[0131] The above merely describes a specific implementation of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be encompassed within the scope of protection of the present application. Therefore, the scope of protection of the present application should be subject to the scope of protection of the claims. Furthermore, the principles and implementation modes of the present application are described by applying specific examples in the specification, and the above example description is merely used to help understand the method and core idea of the present application, and the content of the specification should not be understood as limiting the present application.

Claims

1. A pressure transmitter for detecting the internal pressure of a nuclear power plant containment (6), characterized in that, The pressure transmitter comprises: an in-containment module (1) adapted to be arranged inside the containment vessel (6) to detect the pressure inside the containment vessel (6); an out-of-containment module (3) adapted to be arranged outside the containment vessel (6) to receive the pressure signal detected by the in-containment module (1) and convert it into an electric signal, wherein the out-of-containment module (3) comprises a signal conversion assembly (4); a through-containment module (2) adapted to be arranged through the containment vessel (6), the through-containment module (2) being connected between the in-containment module (1) and the out-of-containment module (3); wherein either the out-of-containment module (3) or the through-containment module (2) comprises a separation assembly (32) comprising two parts detachably connected to each other, one part being connected to the signal conversion assembly (4) and the other part being connected to the through-containment module (2) or being integrally formed with the through-containment module (2).

2. The pressure transmitter of claim 1, wherein, The in-containment module (1) comprises: a first capillary tube (11); a base having a pressure tapping opening (120) at one end and being in communication with the first capillary tube (11) at the other end, the pressure tapping opening (120) being in communication with the inside of the containment vessel (6), and the first capillary tube (11) being in communication with the out-of-containment module (3) at the end away from the base; a pressure diaphragm (121) accommodated in the base and being isolated between the first capillary tube (11) and the pressure tapping opening (120).

3. The pressure transmitter of claim 2, wherein, The in-containment module (1) further comprises a first oil filling tube (122) arranged on the side of the pressure diaphragm (121) away from the pressure tapping opening (120) and being in communication with the end of the first capillary tube (11) close to the pressure diaphragm (121).

4. The pressure transmitter of claim 3, wherein, The base comprises: a diaphragm seat (123) penetrated by the first capillary tube (11) and the first oil filling tube (122) respectively; a head cover (124) provided with the pressure tapping opening (120); wherein the pressure diaphragm (121) is arranged between the diaphragm seat (123) and the head cover (124).

5. The pressure transmitter of claim 4, wherein, The base further comprises a bolt (125) penetrating the diaphragm seat (123) and the head cover (124), and a nut (126) fixing the diaphragm seat (123) and the head cover (124) through the bolt (125).

6. The pressure transmitter of claim 4, wherein, The base further comprises a gasket (127) in the shape of a ring and arranged between the diaphragm seat (123) and the head cover (124), the pressure diaphragm (121) being located in the circular hollow area of the gasket (127).

7. The pressure transmitter of claim 2, wherein, The through-containment module (2) comprises a through-pipe body (20) adapted to be accommodated in the through-pipe (60) of the containment vessel (6), one end of the through-pipe body (20) being in communication with the first capillary tube (11) and the other end being in communication with the out-of-containment module (3).

8. The pressure transmitter of claim 7, wherein, The shell outer module (3) comprises a second capillary tube (31), a separation assembly (32) and a third capillary tube (33), and the separation assembly (32) is in communication between the second capillary tube (31) and the third capillary tube (33).

9. The pressure transmitter of claim 8, wherein, The first capillary tube (11), the second capillary tube (31) and the third capillary tube (33) are each sleeved with an armored metal tube.

10. The pressure transmitter of claim 9, wherein, The separation assembly (32) comprises: a first connecting piece (321) in communication with the second capillary tube (31); a first diaphragm (322) arranged at one end of the first connecting piece (321) away from the second capillary tube (31) and in communication with the second capillary tube (31); a second connecting piece (323) detachably connected with the first connecting piece (321) and in communication with the third capillary tube (33); a second diaphragm (324) arranged at one end of the second connecting piece (323) away from the third capillary tube (33) and in communication with the third capillary tube (33); wherein the first diaphragm (322) and the second diaphragm (324) are attached or transmit pressure via a pressure transmission assembly (5).

11. The pressure transmitter of claim 10, wherein, The pressure transmission assembly (5) is a pressure guide diaphragm, which is attached between the first diaphragm (322) and the second diaphragm (324); alternatively, the pressure transmission assembly (5) comprises: a diaphragm (51) adapted to be attached between the first diaphragm (322) and the second diaphragm (324); a base body (52) fixedly connected with the periphery of the diaphragm (51).

12. The pressure transmitter of claim 11, wherein, The base body (52) is annular, and the periphery of the diaphragm (51) is fixedly connected with the edge of the base body (52).

13. The pressure transmitter of claim 11, wherein, The base body (52) is tubular, and the periphery of the diaphragm (51) is welded with a flange on the inner wall surface of the base body (52), and / or fixedly connected with a port of the base body (52).

14. The pressure transmitter of claim 13, wherein, The number of diaphragms (51) of the pressure transmission assembly (5) is two, one diaphragm (51) is attached with the first diaphragm (322), and the other diaphragm (51) is attached with the second diaphragm (324), and the two diaphragms (51) together enclose a sealed cavity with the base body (52), and the sealed cavity contains a pressure transmission medium.

15. The pressure transmitter according to any one of claims 12-14, characterized in that: the first connecting piece (321) is a nut seat with the first diaphragm (322) arranged inside, the second connecting piece (323) is a threaded tube with the second diaphragm (324) arranged inside, the pressure transmission assembly (5) is arranged in the nut seat and 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 assembly (5) in the nut seat. Alternatively, the first connecting piece (321) is a threaded pipe and internally provided with the first diaphragm (322), the second connecting piece (323) is a nut seat and internally provided with the second diaphragm (324), the pressure transmission assembly (5) is arranged in the nut seat and between the first diaphragm (322) and the second diaphragm (324), and the threaded pipe is threadedly locked with the nut seat so that the pressure transmission assembly (5) is fixed in the nut seat.

16. The pressure transmitter of claim 15, wherein, The outer wall surface of the base body (52) is provided with threads, and the pressure transmission assembly (5) is fixed with the nut seat through the outer wall surface of the base body (52).

17. The pressure transmitter of any one of claims 12-14, wherein, The first connecting piece (321) and the second connecting piece (323) are both nut seats, and the first diaphragm (322) and the second diaphragm (324) are arranged in the nut seat respectively. The outer wall surface of the base body (52) of the pressure transmission assembly (5) is provided with threads, one end of the pressure transmission assembly (5) is screwed into one of the nut seats, and the other end is screwed into the other nut seat.

18. The pressure transmitter of any one of claims 12-14, wherein, The first connecting piece (321) and the second connecting piece (323) are both two threaded pipes, and the first diaphragm (322) and the second diaphragm (324) are arranged in the threaded pipe respectively. The inner wall surface of the base body (52) of the pressure transmission assembly (5) is provided with threads, one end of the pressure transmission assembly (5) is screwed into one of the threaded pipes, and the other end is screwed into the other threaded pipe.

19. The pressure transmitter of claim 10, wherein, The first connecting piece (321) is a nut seat, and the second connecting piece (323) is a threaded pipe, and the nut seat and the threaded pipe are threadedly matched. Alternatively, the first connecting piece (321) is a threaded pipe, and the second connecting piece (323) is a nut seat, and the nut seat and the threaded pipe are threadedly matched.

20. The pressure transmitter of claim 10, wherein, The first connecting piece (321) is close to one side of the second capillary tube (31), and the second connecting piece (323) is close to one side of the third capillary tube (33), and both are provided with a pipe protection structure; One end of the armored metal pipe sleeved on the outer periphery of the second capillary tube (31) is accommodated in the pipe protection structure close to one side of the second capillary tube (31), and one end of the armored metal pipe sleeved on the outer periphery of the third capillary tube (33) is accommodated in the pipe protection structure close to one side of the third capillary tube (33).

21. The pressure transmitter of claim 9, wherein, The signal conversion assembly (4) comprises: A first differential pressure transmitter (41) has a second oil filling pipe (410); A second differential pressure transmitter (42) has a third oil filling pipe (420); A tee pipe (43) has a first pipe end (431) connected with the first differential pressure transmitter (41), a second pipe end (432) connected with the second differential pressure transmitter (42), and a third pipe end (433) connected with the third capillary tube (33); The first differential pressure transmitter (41) and the second differential pressure transmitter (42) have different ranges.

22. The pressure transmitter of claim 9, wherein, The first capillary tube (11), the second capillary tube (31), and the third capillary tube (33) are all filled with a filling liquid, and the filling liquid is benzyl silicone oil.

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