Manufacturing method and verification method of sodium pressure transmitter

Abstract

The invention provides a manufacturing method and a verification method of a sodium pressure transmitter. Separated parts in the sodium pressure transmitter manufactured by the manufacturing method can support the processes of disassembly, measurement, verification and fault tracing in the subsequent verification process. Wherein the sodium pressure transmitter comprises a detachable separation part which is composed of a guide ring and two flanges which are in butt joint with each other and are provided with diaphragms, the separation part can be verified after being detached, and if the separation part is verified to be qualified, the separation part can be assembled, restored and continuously used.

Description

Technical Field

[0001] The invention relates to the technical field of sodium pressure transmitters, and in particular to a manufacturing method and a calibration method of a sodium pressure transmitter. Background Art

[0002] Sodium pressure transmitters are mainly suitable for pressure process monitoring and control of sodium liquid circuits in sodium-cooled fast reactors in nuclear power plants. Characteristics of sodium liquid in the process loop of sodium-cooled fast reactors: high temperature, generally close to 600°C. Sodium liquid is prone to combustion or even explosion when in contact with air. Sodium pressure transmitters are designed for special requirements, and are very different from conventional transmitters in terms of manufacturing methods. The present invention can provide a special manufacturing method for a sodium pressure transmitter. When measuring with conventional pressure transmitters, the process connection is generally a flange installation connection, while the process connection of a sodium pressure transmitter is generally a pipe welding connection. Avoid safety hazards caused by leakage in flange connections. Pressure transmitters are defined as measuring instruments in industry, and are generally required to be dismantled for accuracy verification and traceability within a certain period. Then the welding connection structure of the sodium pressure transmitter makes it difficult to perform periodic verification of the instrument after dismantling.

[0003] Therefore, seeking a sodium pressure transmitter that is easy to disassemble and perform periodic calibration has become a problem that needs to be solved urgently in the art. Summary of the invention

[0004] The object of the present invention is to provide a method for manufacturing and a method for calibrating a sodium pressure transmitter. The separation components in the sodium pressure transmitter manufactured by the manufacturing method can support the disassembly, measurement, inspection and fault tracing process in the subsequent calibration process.

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

[0006] A method for manufacturing a sodium pressure transmitter, the manufacturing method comprising the following steps:

[0007] S1, providing a sensor component, a capillary component, a separation component and a pressure measuring component, wherein the capillary component comprises a first capillary component and a second capillary component, the separation component comprises a positive flange, a guide ring and a reverse flange, and the pressure measuring component comprises a base and a conduit;

[0008] S2, welding the sensor component, the first capillary component and the positive flange in sequence to form a first sealed cavity;

[0009] S3, welding the conduit, the base and the second capillary assembly in sequence to form a second sealed cavity;

[0010] S4, filling the first sealed cavity with silicone oil, and filling the second sealed cavity with liquid sodium-potassium alloy;

[0011] S5, applying filler on the surface of the diaphragm of at least one of the positive flange and the negative flange, inserting the guide ring into the outer circle of the diaphragm end of the positive flange or the negative flange, inserting the flange diaphragm end of the positive flange or the negative flange into the guide ring, making the diaphragm of the positive flange fit with the diaphragm of the negative flange, rotating the positive flange and the negative flange relative to each other by 90°, so that the filler is filled between the diaphragms of the positive flange and the negative flange, and tightening the bolts on the positive flange and the negative flange;

[0012] S6, after the diaphragm of the positive flange contacts the diaphragm of the reverse flange, applying pressure to the diaphragm end of the conduit to detect the difference in output values ​​of the sensor component, thereby testing the loss of pressure transmission;

[0013] S7, measuring parameters through the software of the transmitter component, configuring and adjusting the sodium pressure transmitter according to the measured parameter values, and obtaining the sodium pressure transmitter.

[0014] In some embodiments of the present invention, the sensor component includes a positive pressure side and a pressure guide cover connected to each other, and the positive pressure side and the pressure guide cover are sealed and fixed by circumferential welding;

[0015] The pressure conducting cover is provided with a through hole, and the first capillary assembly is connected to the through hole of the pressure conducting cover.

[0016] In some embodiments of the present invention, the sensor component includes a left clamping plate, the left clamping plate is sealed and connected to the negative pressure side of the sensor component via a sealing gasket, and the left clamping plate is provided with a through hole for communicating with the atmosphere to provide a reference for gauge pressure measurement;

[0017] The sensor component comprises a right clamping plate, the right clamping plate is connected to the positive pressure side of the sensor component, and the right clamping plate is sleeved on the outer peripheral surface of the pressure guide cover;

[0018] The left clamping plate and the right clamping plate are fixed to each other by fasteners.

[0019] In some embodiments of the present invention, in step S1, the capillary component includes a capillary and a joint, the joint is provided with a through hole, the capillary passes through the joint via the through hole, and the capillary and the joint are fixed by argon arc welding.

[0020] In some embodiments of the present invention, in step S1, the capillary component further includes a protective tube, which is sleeved on the outer circumference of the capillary, inserted into the through hole of the joint, and fixed to the joint by circumferential welding.

[0021] In some embodiments of the present invention, a positive diaphragm is provided on the surface of the flange of the positive flange, and a negative diaphragm is provided on the surface of the flange of the negative flange. The positive diaphragm and the flange of the positive flange are fixed by energy storage welding, and the negative diaphragm and the flange of the negative flange are fixed by energy storage welding.

[0022] Some embodiments of the present invention have at least one of the following features:

[0023] The positive diaphragm and the negative diaphragm are made of 316L stainless steel;

[0024] The positive film and the negative film are circular, with a diameter of 55-60 mm and a thickness of 0.05-0.1 mm;

[0025] The positive film and the negative film have overlapping triangular corrugations, and the positive film and the negative film are subjected to heat curing treatment after being integrally formed, and the heat curing treatment conditions are vacuum, heating temperature of 900-1200° C., and natural cooling after heating;

[0026] The surface of the flange of the positive flange is provided with triangular corrugations that are similar in shape to the positive diaphragm, and a gap of 0.25-0.35 mm is provided between the surfaces of the positive diaphragm and the flange of the positive flange.

[0027] In some embodiments of the present invention, the pressure measuring component further includes a pressure measuring diaphragm, and the pressure measuring diaphragm is connected to the surface of the base.

[0028] Some embodiments of the present invention have at least one of the following features:

[0029] The material of the pressure measuring diaphragm is 316L stainless steel;

[0030] The pressure measuring diaphragm is a disc with a diameter of 45-47 mm and a thickness of 0.07-0.1 mm;

[0031] The surface of the pressure measuring diaphragm is provided with triangular corrugations, and preferably the triangular corrugations of the pressure measuring diaphragm are formed by pressure forming of a mold;

[0032] The base and the pressure measuring diaphragm are fixed by argon arc welding or laser welding;

[0033] The base and the conduit are connected by thread fitting and then welded and fixed, and the thread fitting is preferably a fine pitch thread;

[0034] The other end of the conduit away from the base is fixedly connected to the device to be tested by welding.

[0035] In some embodiments of the present invention, in step S2, the first sealed cavity is subjected to a leak rate test, and only when the leak rate is less than (1-3)×10-9 Pa·m 3 / s is judged as passing the leak rate test;

[0036] And / or, in step S3, the second sealed cavity is subjected to a leak rate test, and only when the leak rate is less than (1 to 3)×10 -9 Pa·m 3 / s is judged as passing the leak rate test.

[0037] In some embodiments of the present invention, in step S4, before filling the first sealed cavity with silicone oil, the first sealed cavity is evacuated using a vacuum oil filling device, the vacuuming time is greater than 6 to 8 hours, the vacuum degree is less than 5 to 10 Pa, and then the silicone oil with a vacuum degree less than 5 to 10 Pa after vacuum pretreatment is filled into the first sealed cavity;

[0038] Preferably, a flow meter is used to quantitatively control the filling amount.

[0039] In some embodiments of the present invention, the pressure guide cover is provided with a first oil filling hole connected to the through hole, and the positive flange is provided with a second oil filling hole connected to the first capillary component;

[0040] In the step S4, the silicone oil is filled through the first oil filling hole, and the silicone oil flows out from the second oil filling hole under the action of gravity. Then, steel balls are placed in the first oil filling hole and the second oil filling hole, and then they are sealed with a top screw. After the pressure resistance test is completed, the first oil filling hole and the second oil filling hole are welded to form a permanent seal.

[0041] In some embodiments of the present invention, in step S4, the second sealed cavity is filled with liquid sodium-potassium alloy in a visible glove box filled with inert gas.

[0042] In some embodiments of the present invention, in step S4, before the second sealed cavity is filled with liquid sodium-potassium alloy, the second sealed cavity is evacuated by vacuum oiling equipment, the evacuation time is greater than 6 to 8 hours, the vacuum degree is less than 5 to 10 Pa, and then the liquid sodium-potassium alloy with a vacuum degree less than 5 to 10 Pa after vacuum pretreatment is filled into the second sealed cavity;

[0043] Preferably, a flow meter is used to quantitatively control the filling amount.

[0044] In some embodiments of the present invention, the counter flange is provided with a third oil filling hole connected to the second capillary component, and the base is provided with a fourth oil filling hole connected to the second capillary component;

[0045] In step S4, liquid sodium-potassium alloy is filled through the third oil filling hole, and the liquid sodium-potassium alloy flows out from the fourth oil filling hole under the action of gravity, and then steel balls are placed in the third oil filling hole and the fourth oil filling hole, and then the holes are sealed with a top screw, and after the pressure test is completed, the third oil filling hole and the fourth oil filling hole are welded to form a permanent seal.

[0046] In some embodiments of the present invention, the filler is silicone grease, and the coating thickness is 0.05-0.2 mm.

[0047] In order to achieve the above object, the present invention also provides the following technical solutions:

[0048] A method for calibrating a sodium pressure transmitter, the method for calibrating the sodium pressure transmitter obtained by the above manufacturing method, the method comprising the following steps:

[0049] A1, disconnect the transmitter power supply;

[0050] A2, remove the bolts in the separated parts;

[0051] A3, causing the positive flange in the separation component to rotate relative to the guide ring, and causing the reverse flange in the separation component to rotate relative to the guide ring;

[0052] A4, after disassembling the separation component, connect the separation base of the transmitter component to a pressurizing tool, connect the transmitter component to an ammeter and a power supply in series, and then pressurize and test the transmitter component;

[0053] A5, record the initial pressure P0 and initial current I0, do not adjust to zero, then pressurize in the upstroke and record 3 to 5 pressure values ​​or current values, then pressurize in the downstroke and record 3 to 5 pressure values ​​or current values;

[0054] A6, performing data processing on the data obtained in step A5;

[0055] A7, when the data is qualified, it is determined that the error of the pressure transmitter meets the accuracy requirement, then the positive flange in the separation component is rotated relative to the guide ring, and the reverse flange in the separation component is rotated relative to the guide ring, and the bolts are installed to allow the sodium pressure transmitter to be used normally;

[0056] Otherwise, it is determined that the pressure transmitter error does not meet the accuracy requirement, and the sodium pressure transmitter should be sent for repair or scrapped.

[0057] Further areas of applicability will become apparent from the description provided in the present disclosure.

[0058] 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.

[0059] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0060] The invention provides a manufacturing method and a calibration method for a sodium pressure transmitter. The separation component in the sodium pressure transmitter manufactured by the manufacturing method can support disassembly, measurement, inspection and fault tracing in a subsequent calibration process; wherein the sodium pressure transmitter comprises a detachable separation component consisting of a guide ring and two flanges butted against each other and provided with diaphragms. The separation component can be calibrated after being disassembled, and can be assembled and restored for continued use if the calibration is qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some implementation plans of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0062] Figure 1 A flowchart of a method for manufacturing a sodium pressure transmitter provided in a first embodiment of the present invention;

[0063] Figure 2 A schematic diagram of the structure of a sodium pressure transmitter provided in a second embodiment of the present invention;

[0064] Figure 3 for Figure 2 A schematic diagram of the construction of the capillary component in FIG.

[0065] Figure 4 for Figure 2 A schematic diagram of the structure of the separated components in FIG.

[0066] Figure 5 for Figure 2 A schematic diagram of the construction of the sensor components in FIG.

[0067] Figure 6 for Figure 2 Calibration diagram of the sodium pressure transmitter in FIG.

[0068] Figure 7 This is a flowchart of a calibration method for a sodium pressure transmitter provided in a third embodiment of the present invention.

[0069] Legend of the figure

[0070] 1-sensor component; 101-negative pressure side; 102-positive pressure side; 11-positive pressure side; 12-pressure guide cover; 120-first oil filling hole; 121-perforation; 13-left clamp; 131-through hole; 14-right clamp; 15-fastener

[0071] 2-capillary component; 21-first capillary component; 22-second capillary component; 23-capillary; 24-connector; 25-protective tube;

[0072] 3-separation component; 31-positive flange; 310-second oil filling hole; 311-positive diaphragm; 32-guide ring; 33-negative flange; 330-third oil filling hole; 331-negative diaphragm; 34-fastening bolt;

[0073] 4-pressure measuring component; 41-base; 410-fourth oil filling hole; 42-conduit; 43-pressure measuring diaphragm;

[0074] 5- Transmitter components;

[0075] 6- Differential pressure sensor;

[0076] 71-power supply; 72-ammeter;

[0077] 81 - flange of the pressurizing tool; 82 - sealing ring of the pressurizing tool; 83 - interface of the pressurizing tool. DETAILED DESCRIPTION

[0078] 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.

[0079] 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 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] Unless otherwise stated, when % is mentioned herein, it means wt. %.

[0085] First aspect

[0086] See also Figures 1 to 5 The present invention provides a method for manufacturing a sodium pressure transmitter, the manufacturing method comprising the following steps: S1, providing a sensor component 1, a capillary component 2, a separation component 3 and a pressure measuring component 4, the capillary component 2 comprising a first capillary component 21 and a second capillary component 22, the separation component 3 comprising a positive flange 31, a guide ring 32 and a reverse flange 33, the pressure measuring component 4 comprising a base 41 and a conduit 42; S2, welding the sensor component 1, the first capillary component 21 and the positive flange 31 in sequence to form a first sealed cavity; S3, welding the conduit 42, the base 41 and the second capillary 23 components in sequence to form a second sealed cavity; S4, filling the first sealed cavity with silicone oil, and filling the second sealed cavity with liquid sodium-potassium alloy; S5, applying a filler on the surface of a diaphragm of at least one of the positive flange 31 and the reverse flange 33, and filling the second sealed cavity with a liquid sodium-potassium alloy; The outer circle of the diaphragm end of the positive flange 31 or the reverse flange 33 is inserted into the guide ring 32, and the flange diaphragm end of the positive flange 31 or the reverse flange 33 is inserted into the guide ring 32, so that the diaphragm of the positive flange 31 fits with the diaphragm of the reverse flange 33, and the positive flange 31 and the reverse flange 33 are relatively rotated 90 degrees, so that the filler is filled between the diaphragms of the positive flange 31 and the reverse flange 33, and the bolts on the positive flange 31 and the reverse flange 33 are tightened; S6, after the diaphragm of the positive flange 31 contacts the diaphragm of the reverse flange 33, pressure is applied to the diaphragm end of the conduit 42 to detect the difference in the output value of the sensor component 1, and then test the loss of pressure transmission; S7, the parameters are measured by the software of the transmitter component 5 connected to the sensor component 1, and the sodium pressure transmitter is configured and adjusted according to the measured parameter values ​​to obtain the sodium pressure transmitter.

[0087] The present invention provides a manufacturing method and a calibration method for a sodium pressure transmitter. The separation component in the sodium pressure transmitter manufactured by the manufacturing method can support disassembly, measurement, inspection and fault tracing in a subsequent calibration process; wherein the sodium pressure transmitter comprises a detachable separation component 3 composed of a guide ring 32 and two flanges butted against each other and provided with diaphragms. The separation component can be calibrated after being disassembled, and can be assembled and restored for continued use if the calibration is qualified.

[0088] See also Figure 2 and Figure 5In some embodiments of the present invention, the sensor component 1 includes a positive pressure side 102 and a pressure conductive cover 12 which are connected to each other, and the positive pressure side 102 and the pressure conductive cover 12 are sealed and fixed by circumferential welding; the pressure conductive cover 12 is provided with a through hole 121, and the first capillary 23 assembly is connected to the through hole 121 of the pressure conductive cover 12.

[0089] See also Figure 5 In some embodiments of the present invention, the sensor component 1 includes a left clamping plate 13, which is sealed and connected to the negative pressure side 101 of the sensor component 1 via a sealing gasket, and the left clamping plate 13 is provided with a through hole for connecting to the atmosphere to provide a reference for gauge pressure measurement; the sensor component 1 includes a right clamping plate 14, which is connected to the positive pressure side 102 of the sensor component 1, and the right clamping plate 14 is sleeved on the outer peripheral surface of the pressure guide cover 12; the left clamping plate 13 and the right clamping plate 14 are fixed to each other by fasteners 15.

[0090] See also Figure 3 In some embodiments of the present invention, in the step S1, the capillary component 2 includes a capillary 23 and a joint 24, the joint 24 is provided with a through hole 241, the capillary 23 passes through the joint 24 via the through hole 241, and the capillary 23 and the joint 24 are fixed by argon arc welding.

[0091] See also Figure 3 In some embodiments of the present invention, in step S1, the capillary component 2 also includes a protective tube 25, which is sleeved on the outer circumference of the capillary 23, and the protective tube 25 is inserted into the through hole 241 of the joint 24 and fixed to the joint 24 by circumferential welding.

[0092] See also Figure 4 In some embodiments of the present invention, a positive diaphragm 311 is provided on the surface of the flange of the positive flange 31, and a negative diaphragm 331 is provided on the surface of the flange of the negative flange 33. The positive diaphragm 311 and the flange of the positive flange 31 are fixed by energy storage welding, and the negative diaphragm 331 and the flange of the negative flange 33 are fixed by energy storage welding.

[0093] In some embodiments of the present invention, the positive diaphragm 311 and the negative diaphragm 331 are made of 316L stainless steel.

[0094] In some embodiments of the present invention, the positive membrane 311 and the negative membrane 331 are circular, with a diameter of 55-60 mm and a thickness of 0.05-0.1 mm.

[0095] In some embodiments of the present invention, the positive diaphragm 311 and the negative diaphragm 331 have overlapping triangular corrugations, and the positive diaphragm 311 and the negative diaphragm 331 are subjected to heat curing treatment after being integrally formed, and the conditions of the heat curing treatment are vacuum, heating temperature of 900-1200°C and natural cooling after heating.

[0096] In some embodiments of the present invention, the surface of the flange of the positive flange 31 is provided with triangular corrugations similar in shape to the positive diaphragm 311 , and a gap of 0.25 to 0.35 mm is provided between the surface of the positive diaphragm 311 and the flange of the positive flange 31 .

[0097] See also Figure 2 In some embodiments of the present invention, the pressure measuring component 4 further includes a pressure measuring diaphragm 43 , and the pressure measuring diaphragm 43 is connected to the surface of the base 41 .

[0098] In some embodiments of the present invention, the pressure measuring diaphragm 43 is made of 316L stainless steel.

[0099] In some embodiments of the present invention, the pressure measuring diaphragm 43 is a round disc with a diameter of 45-47 mm and a thickness of 0.07-0.1 mm.

[0100] In some embodiments of the present invention, the surface of the pressure measuring diaphragm 43 is provided with triangular corrugations, and preferably the triangular corrugations of the pressure measuring diaphragm 43 are formed by pressure forming with a mold.

[0101] See also Figure 2 In some embodiments of the present invention, the base 41 and the pressure measuring diaphragm 43 are fixed by argon arc welding or laser welding.

[0102] In some embodiments of the present invention, the base 41 and the conduit 42 are connected by threaded fitting and then welded and fixed, and the threaded fitting is preferably a fine pitch thread.

[0103] In some embodiments of the present invention, the other end of the conduit 42 away from the base 41 is fixedly connected to the device to be tested by welding.

[0104] In some embodiments of the present invention, in step S2, the first sealed cavity is subjected to a leak rate test, and only when the leak rate is less than (1-3)×10 -9 Pa·m 3 / s is judged as passing the leak rate test.

[0105] In some embodiments of the present invention, in step S3, the second sealed cavity is subjected to a leak rate test, and only when the leak rate is less than (1-3)×10 -9 Pa·m 3 / s is judged as passing the leak rate test.

[0106] In some embodiments of the present invention, in step S4, before filling the first sealed cavity with silicone oil, the first sealed cavity is evacuated using a vacuum oiling equipment, the vacuuming time is greater than 6 to 8 hours, the vacuum degree is less than 5 to 10 Pa, and then the silicone oil that has undergone vacuum pretreatment and has a vacuum degree of less than 5 to 10 Pa is filled into the first sealed cavity.

[0107] In some embodiments of the present invention, a flow meter is used to quantitatively control the filling amount.

[0108] See also Figure 2 and Figure 5 In some embodiments of the present invention, the pressure guide cover 12 is provided with a first oil filling hole 120 connected to the through hole 121, and the front flange 31 is provided with a second oil filling hole 310 connected to the first capillary component 21; in the step S4, the silicone oil is filled through the first oil filling hole 120, and the silicone oil flows out from the second oil filling hole 310 under the action of gravity, and then steel balls are placed in the first oil filling hole 120 and the second oil filling hole 310, and then they are sealed with a top screw, and after the pressure test is completed, the first oil filling hole 120 and the second oil filling hole 310 are welded to form a permanent seal.

[0109] In some embodiments of the present invention, in step S4, the second sealed cavity is filled with liquid sodium-potassium alloy in a visible glove box filled with inert gas.

[0110] In some embodiments of the present invention, in step S4, before filling the second sealed cavity with liquid sodium-potassium alloy, the second sealed cavity is evacuated using vacuum oiling equipment, the vacuuming time is greater than 6 to 8 hours, the vacuum degree is less than 5 to 10 Pa, and then the liquid sodium-potassium alloy that has undergone vacuum pretreatment and has a vacuum degree of less than 5 to 10 Pa is filled into the second sealed cavity.

[0111] In some embodiments of the present invention, a flow meter is used to quantitatively control the filling amount.

[0112] See also Figure 2 In some embodiments of the present invention, the counter flange 33 is provided with a third oil filling hole 330 connected to the second capillary component 22, and the base 41 is provided with a fourth oil filling hole 410 connected to the second capillary component 22; in the step S4, liquid sodium-potassium alloy is filled through the third oil filling hole 330, and the liquid sodium-potassium alloy flows out from the fourth oil filling hole 410 under the action of gravity, and then steel balls are placed in the third oil filling hole 330 and the fourth oil filling hole 410, and then they are sealed with a top screw, and after the pressure test is completed, the third oil filling hole 330 and the fourth oil filling hole 410 are welded to form a permanent seal.

[0113] In some embodiments of the present invention, the filler is silicone grease, and the coating thickness is 0.05-0.2 mm.

[0114] See also Figure 2 and Figure 5 , the differential pressure sensor 6 is connected to the sensor component 1.

[0115] Second aspect

[0116] See also Figure 7 The present invention provides a calibration method for a sodium pressure transmitter, the calibration method is used to calibrate the sodium pressure transmitter obtained by the above manufacturing method, and the calibration method comprises the following steps: A1, disconnecting the transmitter power supply; A2, removing the bolts in the separation component 3; A3, rotating the positive flange 31 in the separation component 3 relative to the guide ring 32, and rotating the reverse flange 33 in the separation component 3 relative to the guide ring 32; A4, after the separation component 3 is disassembled, connecting the separation base 41 of the transmitter component 5 with a pressurizing tool, and connecting the transmitter component 5 with the ammeter 72 and the power supply 71 in series in sequence, and then pressurizing the transmitter component 5; A5 , record the initial pressure P0 and the initial current I0, do not adjust to zero, then pressurize the upper stroke in sequence, and record 3 to 5 pressure values ​​or current values, then pressurize the lower stroke in sequence, and record 3 to 5 pressure values ​​or current values; A6, perform data processing on the data obtained in step A5; A7, when the data is qualified, it is determined that the error of the pressure transmitter meets the accuracy requirements, then the positive flange 31 in the separation component 3 is rotated relative to the guide ring 32, and the reverse flange 33 in the separation component 3 is rotated relative to the guide ring 32, and the bolts are installed to allow the sodium pressure transmitter to be used normally; otherwise, it is determined that the error of the pressure transmitter does not meet the accuracy requirements, and the sodium pressure transmitter should be sent for repair or scrapped.

[0117] See also Figure 6 The positive flange 31 and the flange 81 of the pressurizing tooling are fixed by fastening bolts 34; a sealing ring 82 of the pressurizing tooling is provided between the flange 81 of the pressurizing tooling and the positive flange 31; the interface 83 of the pressurizing tooling can apply pressure to the positive diaphragm 311 on the positive flange 31.

[0118] Regarding the calibration method provided by the present invention, taking the range of -0.1 to 2.4 MPa as an example, the example data is shown in Table 1 below:

[0119] Table 1 Example of test data

[0120]

[0121]

[0122] As shown in Table 1 above, during the calibration process, the maximum difference in the instrument output is 0.034 mA, and the maximum error is 0.21%, which meets the accuracy level of 0.25. At this time, the separation component 3 can be installed and restored for continued use.

[0123] 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 method for manufacturing a sodium pressure transmitter, characterized in that: The manufacturing method comprises the following steps: S1, providing a sensor component (1), a capillary component (2), a separation component (3) and a pressure measuring component (4), wherein the capillary component (2) comprises a first capillary component (21) and a second capillary component (22), the separation component (3) comprises a positive flange (31), a guide ring (32) and a counter flange (33), and the pressure measuring component (4) comprises a base (41) and a guide tube (42); S2, welding the sensor component (1), the first capillary component (21) and the positive flange (31) in sequence to form a first sealed cavity; S3, welding the conduit (42), the base (41) and the second capillary tube (23) assembly in sequence to form a second sealed cavity; S4, filling the first sealed cavity with silicone oil, and filling the second sealed cavity with liquid sodium-potassium alloy; S5, applying filler on the surface of the diaphragm of at least one of the positive flange (31) and the counter flange (33), inserting the guide ring (32) into the outer circle of the diaphragm end of the positive flange (31) or the counter flange (33), inserting the flange diaphragm end of the positive flange (31) or the counter flange (33) into the guide ring (32), making the diaphragm of the positive flange (31) fit with the diaphragm of the counter flange (33), rotating the positive flange (31) and the counter flange (33) relative to each other by 90°, so that the filler is filled between the diaphragms of the positive flange (31) and the counter flange (33), and tightening the bolts on the positive flange (31) and the counter flange (33); S6, after the diaphragm of the positive flange (31) contacts the diaphragm of the reverse flange (33), pressure is applied to the diaphragm end of the conduit (42) to detect the difference in output values ​​of the sensor component (1), thereby testing the loss of pressure transmission; S7, measuring parameters through software of a transmitter component (5) connected to the sensor component (1), configuring and adjusting the sodium pressure transmitter according to the measured parameter values, and obtaining the sodium pressure transmitter.

2. The manufacturing method according to claim 1, characterized in that: The sensor component (1) comprises a positive pressure side (102) and a pressure guide cover (12) which are connected to each other, and the positive pressure side (102) and the pressure guide cover (12) are sealed and fixed by circumferential welding; The pressure-conducting cover (12) is provided with a through hole, and the first capillary tube (23) component is connected to the through hole of the pressure-conducting cover (12).

3. The manufacturing method according to claim 1, characterized in that: The sensor component (1) comprises a left clamping plate (13), the left clamping plate (13) being sealedly connected to the negative pressure side (101) of the sensor component (1) via a sealing gasket, and the left clamping plate (13) being provided with a through hole for communicating with the atmosphere to provide a reference for gauge pressure measurement; The sensor component (1) comprises a right clamping plate (14), the right clamping plate (14) is connected to the positive pressure side (102) of the sensor component (1), and the right clamping plate (14) is sleeved on the outer peripheral surface of the pressure guide cover (12); The left clamping plate (13) and the right clamping plate (14) are fixed to each other via a fastener (15).

4. The manufacturing method according to claim 1, characterized in that: In the step S1, the capillary component (2) includes a capillary (23) and a joint (24), the joint (24) is provided with a through hole (241), the capillary (23) passes through the joint (24) via the through hole (241), and the capillary (23) and the joint (24) are fixed by argon arc welding.

5. The manufacturing method according to claim 4, characterized in that: In the step S1, the capillary component (2) further comprises a protective tube (25), wherein the protective tube (25) is sleeved on the outer circumference of the capillary (23), the protective tube (25) is inserted into the through hole (241) of the joint (24), and is fixed to the joint (24) by circumferential welding.

6. The manufacturing method according to claim 1, characterized in that: A positive diaphragm (311) is provided on the surface of the flange of the positive flange (31), and a negative diaphragm (331) is provided on the surface of the flange of the negative flange (33); the positive diaphragm (311) and the flange of the positive flange (31) are fixed by energy storage welding, and the negative diaphragm (331) and the flange of the negative flange (33) are fixed by energy storage welding.

7. The manufacturing method according to claim 6, characterized in that: Have at least one of the following characteristics: The positive diaphragm (311) and the negative diaphragm (331) are made of 316L stainless steel; The positive film (311) and the negative film (331) are circular, with a diameter of 55 to 60 mm and a thickness of 0.05 to 0.1 mm; The positive film (311) and the negative film (331) have overlapping triangular corrugations. After being integrally formed, the positive film (311) and the negative film (331) are subjected to a heat curing treatment. The heat curing treatment is carried out under vacuum, a heating temperature of 900 to 1200° C., and natural cooling after heating. The surface of the flange of the positive flange (31) is provided with triangular corrugations that are similar in shape to the positive diaphragm (311), and a gap of 0.25 to 0.35 mm is provided between the surfaces of the positive diaphragm (311) and the flange of the positive flange (31).

8. The manufacturing method according to claim 1, characterized in that: The pressure measuring component (4) further comprises a pressure measuring diaphragm (43), and the pressure measuring diaphragm (43) is connected to the surface of the base (41).

9. The manufacturing method according to claim 8, characterized in that: Have at least one of the following characteristics: The material of the pressure measuring diaphragm (43) is 316L stainless steel; The pressure measuring diaphragm (43) is a round disc with a diameter of 45 to 47 mm and a thickness of 0.07 to 0.1 mm; The surface of the pressure measuring diaphragm (43) is provided with triangular corrugations, and preferably the triangular corrugations of the pressure measuring diaphragm (43) are formed by means of mold pressure molding; The base (41) and the pressure measuring diaphragm (43) are fixed by argon arc welding or laser welding; The base (41) and the conduit (42) are connected by thread fitting and then welded and fixed, and the thread fitting is preferably a fine pitch thread; The other end of the conduit (42) away from the base (41) is fixedly connected to the device to be tested by welding.

10. The manufacturing method according to claim 2, characterized in that: In step S2, the first sealed cavity is subjected to a leak rate test, and only when the leak rate is less than (1 to 3)×10 -9 Pa·m 3 / s is judged as passing the leak rate test; And / or, in step S3, the second sealed cavity is subjected to a leak rate test, and only when the leak rate is less than (1 to 3)×10 -9 Pa·m 3 / s is judged as passing the leak rate test.

11. The manufacturing method according to claim 10, characterized in that: In the step S4, before filling the first sealed cavity with silicone oil, the first sealed cavity is evacuated with a vacuum oil filling device, the vacuum time is greater than 6 to 8 hours, the vacuum degree is less than 5 to 10 Pa, and then the silicone oil with a vacuum degree less than 5 to 10 Pa after vacuum pretreatment is filled into the first sealed cavity; Preferably, a flow meter is used to quantitatively control the filling amount.

12. The manufacturing method according to claim 11, characterized in that: The pressure guide cover (12) is provided with a first oil injection hole (120) connected to the through hole, and the front flange (31) is provided with a second oil injection hole (310) connected to the first capillary component (21); In step S4, the silicone oil is filled through the first oil filling hole (120), and the silicone oil flows out from the second oil filling hole (310) under the action of gravity. Then, steel balls are placed in the first oil filling hole (120) and the second oil filling hole (310), and then the holes are sealed with a top screw. After the pressure resistance test is completed, the first oil filling hole (120) and the second oil filling hole (310) are welded to form a permanent seal.

13. The manufacturing method according to claim 10, characterized in that: In the step S4, the second sealed cavity is filled with liquid sodium-potassium alloy in a visible glove box filled with inert gas.

14. The manufacturing method according to claim 13, characterized in that: In the step S4, before the second sealed cavity is filled with liquid sodium-potassium alloy, the second sealed cavity is evacuated by vacuum oiling equipment, the evacuation time is greater than 6 to 8 hours, the vacuum degree is less than 5 to 10 Pa, and then the liquid sodium-potassium alloy with a vacuum degree less than 5 to 10 Pa after vacuum pretreatment is filled into the second sealed cavity; Preferably, a flow meter is used to quantitatively control the filling amount.

15. The manufacturing method according to claim 14, characterized in that: The counter flange (33) is provided with a third oil filling hole (330) which is in communication with the second capillary tube component (22), and the base (41) is provided with a fourth oil filling hole (410) which is in communication with the second capillary tube component (22); In the step S4, liquid sodium-potassium alloy is filled through the third oil filling hole (330), and the liquid sodium-potassium alloy flows out from the fourth oil filling hole (410) under the action of gravity, and then steel balls are placed in the third oil filling hole (330) and the fourth oil filling hole (410), and then they are sealed with a top screw. After the pressure resistance test is completed, the third oil filling hole (330) and the fourth oil filling hole (410) are welded to form a permanent blockage.

16. The manufacturing method according to claim 1, characterized in that: The filler is silicone grease, and the coating thickness is 0.05-0.2 mm.

17. A method for calibrating a sodium pressure transmitter, characterized in that: The calibration method is used to calibrate the sodium pressure transmitter obtained by any one of the manufacturing methods of claims 1 to 16, and the calibration method comprises the following steps: A1, disconnect the transmitter power supply; A2, remove the bolts in the separated component (3); A3, causing the positive flange (31) in the separation component (3) to rotate relative to the guide ring (32), and causing the reverse flange (33) in the separation component (3) to rotate relative to the guide ring (32); A4, after the separation component (3) is disassembled, the separation base (41) of the transmitter component (5) is connected to a pressurizing tool, and the transmitter component (5) is connected in series with an ammeter and a power supply in sequence, and then the transmitter component (5) is pressurized for testing; A5, record the initial pressure P0 and initial current I0, do not adjust to zero, then pressurize in the upstroke and record 3 to 5 pressure values ​​or current values, then pressurize in the downstroke and record 3 to 5 pressure values ​​or current values; A6, performing data processing on the data obtained in step A5; A7, when the data is qualified and it is determined that the error of the pressure transmitter meets the accuracy requirement, the positive flange (31) in the separation component (3) is rotated relative to the guide ring (32), and the reverse flange (33) in the separation component (3) is rotated relative to the guide ring (32), and the bolts are installed so that the sodium pressure transmitter can be used normally; Otherwise, it is determined that the pressure transmitter error does not meet the accuracy requirement, and the sodium pressure transmitter should be sent for repair or scrapped.

Images