CN217236653U

CN217236653U - Isolator diaphragm position measuring device

Info

Publication number: CN217236653U
Application number: CN202220650749.0U
Authority: CN
Inventors: 陈永伟; 邹洪先; 李元
Original assignee: China General Nuclear Power Corp; CGN Power Co Ltd; China Nuclear Power Operation Co Ltd
Current assignee: China General Nuclear Power Corp; CGN Power Co Ltd; China Nuclear Power Operation Co Ltd
Priority date: 2022-03-23
Filing date: 2022-03-23
Publication date: 2022-08-19
Anticipated expiration: 2032-03-23

Abstract

The utility model relates to a position measuring device for a diaphragm of an isolator, the isolator comprises a first base, a second base and a diaphragm clamped between the first base and the second base, the second base is provided with a first connecting hole opposite to the diaphragm, and the measuring device comprises a guide gauge and a measuring rod; the guide gauge is detachably connected with the first connecting hole, and a guide hole opposite to the first connecting hole is formed in the guide gauge; the measuring rod comprises a measuring section, the measuring section is inserted into the guide hole, and when the inner end of the measuring section abuts against the diaphragm, the position of the diaphragm is obtained through the insertion depth of the measuring rod. High-precision measurement of the deviation state of the isolator diaphragm is realized through a guide gauge and a measuring rod; the nuclear-grade transmitter which is vacuumized and filled with liquid by the measuring device has good measuring accuracy and stability, and remarkable economic and social benefits are obtained.

Description

Isolator diaphragm position measuring device

Technical Field

The utility model relates to a nuclear power field, more specifically say, relate to an isolator diaphragm position measuring device.

Background

The core-level transmitter with the capillary line mainly structurally comprises a transmitter body, the capillary line and an isolator. The isolator is directly connected with a loop medium, directly senses the pressure of the medium and transmits the pressure to the capillary line. The capillary line is filled with desalted and deoxygenated water, and pressure transmission is realized through water medium.

The transmitter body senses differential pressure by adopting an inductive measurement principle and converts the differential pressure change of physical quantity into the change of an inductive signal. The installation and replacement of the nuclear level transmitter with the capillary line adopt a vacuumizing and liquid filling technology, namely, the capillary line, the isolator and the pressure transmission medium cavity of the transmitter body need to be vacuumized, and the capillary line, the isolator and the pressure transmission medium cavity are filled with desalted and deoxidized water.

The filling effect of the capillary line, the isolator and the cavity of the transmitter body directly influences the accuracy and the stability of the measurement of the transmitter, so that the effect of vacuumizing and filling liquid needs to be ensured.

Particularly, the lower isolator needs to be pre-filled before the lower isolator is vacuumized and filled with liquid, so that the diaphragm of the lower isolator is in a middle state when the lower isolator is filled with vacuum and liquid, and the linearity measured by the transmitter is prevented from being influenced.

The left side of the isolator is connected to a capillary line (M20 x 100 connector port) as shown in fig. 1, the right side of the isolator is connected to a sample line (1/4 inch connector port), and the upper right side of the isolator is also provided with a vent plug as shown in fig. 2.

The middle of the isolator is provided with a diaphragm which is used for transmitting the pressure in the process system to the diaphragm through a sampling pipeline; the diaphragm transmits the pressure to the capillary line side without damage, and the pressure is transmitted to the transmitter body through the aqueous medium in the capillary line.

Isolator pre-filling is the filling of an aqueous medium into the chamber on the right side of the isolator and ensures the fullness and integrity of the fill. The method and the device prevent the diaphragm from deflecting in the process of vacuumizing the capillary pipeline on the left side of the isolator and the chamber on the left side of the isolator, so that the linearity of the measurement of the transmitter is poor, and the accuracy of the overall measurement in the range is influenced. The purpose of the isolator prefill is to fill the right chamber of the isolator with an aqueous medium while ensuring that the diaphragm is in the neutral state during the process.

Therefore, the state of the diaphragm of the isolator needs to be measured, and the good linearity of pressure transmission of the isolator is ensured.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide an isolator diaphragm position measuring device.

The utility model provides a technical scheme that its technical problem adopted is: constructing an isolator diaphragm position measuring device, wherein the isolator comprises a first base, a second base and a diaphragm clamped between the first base and the second base, the second base is provided with a first connecting hole opposite to the diaphragm, and the measuring device comprises a guide gauge and a measuring rod;

the guide gauge is detachably connected with the first connecting hole, and a guide hole opposite to the first connecting hole is formed in the guide gauge;

the measuring rod comprises a measuring section, the measuring section is inserted into the guide hole, and when the inner end of the measuring section abuts against the diaphragm, the position of the diaphragm is obtained through the insertion depth of the measuring rod.

In some embodiments, the guide gauge is threadably coupled to the first connection bore.

In some embodiments, the measuring section includes a thimble section and a positioning section connected to each other, an outer diameter of the thimble section is smaller than an outer diameter of the positioning section, and an end of the positioning section away from the thimble section is connected to the reference section.

In some embodiments, the outer diameter of the locating section matches the guide hole.

In some embodiments, an end of the first connection hole proximate to the membrane includes a locating hole section that matches an outer diameter of the thimble section.

In some embodiments, the measuring pole further comprises a reference section connected to the measuring section, the reference section being spaced opposite the guide gauge to measure the distance between the guide gauge and the reference section.

In some embodiments, the end of the reference section connected to the measuring section is planar and perpendicular to the axial direction of the measuring rod.

In some embodiments, the guide gauge is screwed with the first connecting hole, and the end face of the guide gauge is a plane and is perpendicular to the axial direction of the guide hole.

In some embodiments, the reference section and the guide gauge are respectively provided with a reference position for measuring the distance therebetween.

In some embodiments, the reference position is one or a combination of an inner groove, an inner recess, and a boss.

Implement the utility model discloses an isolator diaphragm position measuring device has following beneficial effect: the isolator diaphragm position measuring device realizes high-precision measurement of the offset state of the isolator diaphragm through the guide gauge and the measuring rod; and simultaneously, establishing an acceptance standard of the isolator priming solution through the offset of the isolator diaphragm. The nuclear-grade transmitter which is vacuumized and filled with liquid by the measuring device has good measuring accuracy and stability, and remarkable economic and social benefits are obtained.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

FIG. 1 is a schematic sectional view of a separator;

FIG. 2 is a schematic view of the right side view of the isolator;

fig. 3 is a cross-sectional view of the priming solution unit of an embodiment of the present invention mated with the first connection port;

FIG. 4 is a schematic view of the priming solution unit of FIG. 3 coupled to a fill actuator;

fig. 5 is a schematic diagram of a measuring device in an embodiment of the present invention when measuring a position of a diaphragm.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the isolator includes a first base 1, a second base 2, and a diaphragm 3 interposed between the first base 1 and the second base 2, the second base 2 is provided with a first connection hole 21 opposite to the diaphragm 3, and further, the first base 1 is provided with a second connection hole 11 opposite to the diaphragm 3.

Usually, fill liquid and water into the storage space that membrane 3 was deposited by first connecting hole 21 earlier, fill aqueous medium in the space between membrane 3 and first connecting hole 21, reuse isolator diaphragm position measuring device 4 to measure the position of membrane 3, guarantee that membrane 3 is in the intermediate state.

Preferably, the second base 2 is further provided with an exhaust hole 22 communicated with the storage space of the membrane 3, so that the air in the storage space is exhausted outwards while water is injected.

Referring to fig. 2 and 3, the separator priming solution device 5 of a preferred embodiment of the present invention includes a water injection pipe section 51, a locking section 52, and a water injection nozzle 53, which are sequentially disposed from outside to inside, and the separator priming solution device is inserted into the second connecting hole.

Further, the first connection hole 21 includes a locking hole section 221 and a sealing hole section 222 which are arranged from outside to inside, the locking section 52 is connected between the water injection pipe section 51 and the water injection nozzle 53, and the locking section 52 is screwed with the locking hole section 221, wherein the outer wall surface of the second base 2 which is pointed outwards refers to the side close to the membrane.

The water filling pipe section 51 communicates with the water filling nozzle 53, and the water filling nozzle 53 is inserted into the sealing hole section 222 to fill the storage space with water and seal the first connection hole 21 after the locking section 52 is locked.

The priming device 5 can ensure the normal implementation of the priming operation of the isolator, realize good priming filling effect, ensure the reliability of the replacement process and reduce the risk of plan delay of an overhaul mainline; and the accuracy and the stability of the measurement of the important nuclear-grade transmitter are improved. Meanwhile, the transmitter participates in the functions of monitoring the water level of the reactor core of the nuclear power unit, monitoring the water level of the voltage stabilizer and protecting, and plays an important role in improving the nuclear safety performance.

Preferably, the diameter of the sealing hole section 222 is smaller than that of the locking hole section 221, so as to facilitate the sealing of the water injection nozzle 53 with the sealing hole section 222.

Further, in order to further enhance the sealing effect, the sealing hole section 222 includes a first sealing section 2221 and a second sealing section 2222, the first sealing section 2221 is located between the second sealing section 2222 and the locking section 52, and the aperture of the first sealing section 2221 is larger than that of the second sealing section 2222. The water injection nozzle 53 is inserted into the first sealing section 2221 to be fitted to a side wall surface of the first sealing section 2221.

In this embodiment, the nozzle 53 includes a tubular body 531 and a sealing head 532, the tubular body 531 and the locking section 52 are axially disposed, and the sealing head 532 is located at an end of the tubular body 531 away from the locking section 52. Preferably, the end of the sealing head 532 is closed, and the tube 531 is opened with a water outlet 5311 communicated with the water injection tube 51. When the water is filled inwards by using the water filling nozzle 53, the exhaust valve 23 on the exhaust hole 22 is released, the locking section 52 is not locked in place, and the sealing head 532 is not in contact with the sealing hole section 222, so that water enters the isolator.

After the water injection is completed, the locking section 52 is locked, then the exhaust valve 23 on the exhaust hole 22 is locked, the position of the exhaust hole 22 is sealed, and the connecting position between the sealing head 532 and the first sealing section 2221 and the second sealing section 2222 is sealed, so that the water leakage is prevented.

By means of the tight fit of the connection positions between the sealing head 532 and the first sealing section 2221 and the second sealing section 2222, the sealing at the positions is realized, and the sealing performance is good.

Preferably, the sealing head 532 is tapered, an inclined plane matched with the sealing head 532 is arranged between the first sealing section 2221 and the second sealing section 2222, and the tapered sealing head 532 is matched with the inclined plane to realize sealing. It is understood that in other embodiments, the sealing head 532 has a round head shape, and the first sealing section 2221 and the second sealing section 2222 have an arc therebetween, the round head sealing head 532 cooperates with the arc surface to achieve sealing.

To facilitate screwing, the isolator priming apparatus 5 further includes a locking section 54 provided on an outer peripheral wall of the locking section 52 for rotating the locking section 52 by a tool such as a wrench. Preferably, the locking segment 54 is a bolt that is easily driven by a wrench.

Further, the water filling pipe section 51 is connected to the locking section 52 through the locking section 54, and the locking section 52 communicates the water filling pipe section 51 and the water filling nozzle 53.

As shown in fig. 4, the water filling pipe section 51 is typically a hose, and the liquid filling apparatus 5 further includes a water filling driving apparatus 55 connected to the water filling pipe section 51, and supplies water to the water filling pipe section 51 and fills the separator. In this embodiment, the water injection driving device 55 includes a water injection pump.

The locking section 52 of the isolator priming device 5 adopts an 1/4-inch NPT assembly, and a water injection pump is connected with the isolator through a hose and the 1/4-inch NPT locking section 52 on the priming device 5; firstly, opening the exhaust valve 23, wherein the top of the exhaust valve 23 is of a top bead structure, and the isolator cavity and the atmosphere form a passage in a unscrewing state and are in an atmosphere facing state; the screwing state means that the isolator chamber and the atmosphere form a closed passage and are in a closed state.

At the beginning, the priming device 5 and the isolator are in a connection state, but not in a fully fastened state, and the water injection pump forms a passage through the priming device 5 and the isolator. The water injection pump performs injection operation, the aqueous medium is injected into the isolator cavity through the hose, the air medium in the cavity is continuously discharged due to the injection of the aqueous medium, and the aqueous medium is continuously discharged from a passage formed by the isolator cavity and the atmosphere from the exhaust valve 23.

At this time, the water injection pump is closed first, and then the exhaust valve 23 is closed, so that the sequence cannot be changed, and the phenomenon that the diaphragm 3 deviates from the middle state due to the pressure build-up formed inside the isolator is avoided. After the operations are finished, the priming liquid device 5 is screwed, the isolator cavity is disconnected with an internal passage of the priming liquid device 5, the isolator cavity is filled with water medium, the hose and the water injection pump are removed, and the priming liquid of the isolator is finished.

The main innovation points and application values of the isolator priming liquid assembly are as follows:

the priming solution device 5 has good adaptability with the internal structure of the isolator, and the priming solution of the isolator is realized; meanwhile, the completeness of liquid filling and the fullness degree of the cavity are ensured to be in a water medium filling state through the operation of water filling and air exhausting on the medium side.

The design of the conical surface at the top of the water injection nozzle 53 of the isolator priming device 5 ensures the establishment of the isolator cavity and the external passage during the liquid filling process; meanwhile, after the liquid filling is finished, the isolator cavity is disconnected from an external passage, and the sealing function is good.

The locking section 54 of the isolator priming device 5 and the water injection pipe section 51 are convenient to fasten and connect, and work efficiency is improved.

The isolator priming device 5 is a special tool for priming operation, so that the normal implementation of the priming liquid is ensured, and the effect of the priming liquid is ensured.

After the water injection is finished, the exhaust valve 23 is installed, the water injection pump and the isolator priming liquid device 5 are disassembled, at the moment, the water in the right chamber cannot flow out, and then the position of the diaphragm is measured from the first connecting hole 21 by the isolator diaphragm position measuring device 4.

Referring to fig. 1 and 5, the isolator diaphragm position measuring device 4 according to a preferred embodiment of the present invention includes a guide gauge 41 and a measuring rod 42, wherein when the isolator diaphragm position measuring device 4 is used to measure the position of the isolator diaphragm, the guide gauge 41 is connected to the first connecting hole 21, and the guide gauge 41 is provided with a guide hole 411 opposite to the first connecting hole 21.

The measuring rod 42 comprises a measuring section 421, the measuring section 421 is inserted into the guide hole 411, and when the inner end of the measuring section 421 abuts against the membrane 3, the position of the membrane 3 is obtained by the depth of insertion of the measuring rod 42.

The isolator diaphragm position measuring device 4 realizes high-precision measurement of the offset state of the isolator diaphragm 3 through the guide gauge 41 and the measuring rod 42; meanwhile, the acceptance standard of the pre-filling liquid of the isolator is formulated through the offset of the isolator diaphragm 3. The isolator diaphragm position measuring device 4 has good measurement accuracy and stability when completing the vacuumizing and liquid filling nuclear-grade transmitter, and remarkable economic and social benefits are obtained. Meanwhile, the isolator diaphragm position measuring device 4 is wide in applicability and has a wide popularization and application prospect.

Preferably, a threaded hole is formed in the first connecting hole 21, and the guide gauge 41 is screwed with the first connecting hole 21, so that the installation is stable and reliable.

In this embodiment, the measuring section 421 includes a thimble section 4211 and a positioning section 4212 connected to each other, and the thimble section 4211 has an outer diameter smaller than that of the positioning section 4212, so as to facilitate insertion into the hole section with a smaller inner end bore of the first connection hole 21.

Preferably, the outer diameter of the positioning section 4212 is matched with the guide hole 411, so that the positioning section 4212 is stably matched with the guide hole 411, and the positioning section 4212 is just matched with the aperture of the guide hole 411, so that the measuring rod 42 can be normally inserted, the measuring deviation caused by an overlarge gap is avoided, and the measuring rod 42 and the membrane 3 are in a vertical state. The thimble section 4211 normally extends into the diaphragm 3 and contacts with the diaphragm 3, and the measuring section 421 realizes that the plane of the isolator diaphragm 3 is in a vertical state, so that the measuring accuracy is ensured, and the measuring precision is improved.

For better positioning, the first connection hole 21 includes a positioning hole section 111 at the end near the membrane 3, which matches the outer diameter of the ejector pin section 4211, for inserting the ejector pin section 4211, and ensures that the ejector pin section 4211 is perpendicular to the membrane 3.

The measuring rod 42 further comprises a reference section 422 connected with the measuring section 421, the end of the positioning section 4212 far away from the thimble section 4211 is connected with the reference section 422, and a user can hold the reference section 422 and insert the measuring section 421 into the guide hole 411, so that the operation is convenient. The reference section 422 is spaced opposite to the guide gauge 41 to measure the distance between the guide gauge 41 and the reference section 422, and the position of the diaphragm 3 can be obtained by measuring the distance between the guide gauge 41 and the reference section 422, so as to determine whether the diaphragm 3 is in a vertical state.

Preferably, in the present embodiment, the end of the reference segment 422 connected to the measuring segment 421 is a plane and perpendicular to the axial direction of the measuring rod 42, so as to facilitate measurement. Further, the guide gauge 41 is screwed to the first connection hole 21, and the end face of the guide gauge 41 is a flat surface and perpendicular to the axial direction of the guide hole 411, and the distance between the two opposite surfaces of the reference section 422 and the guide gauge 41 is measured, so that the position of the diaphragm 3 can be calculated, and whether the diaphragm is in a perpendicular state or not can be judged.

The measurement principle of the isolator diaphragm 3 is shown in fig. 5, after the guide gauge 41 is installed on the isolator, the measuring rod 42 is inserted into the isolator along the guide hole 411 on the guide gauge 41, and due to the guiding effect of the guide gauge 41, the top end of the measuring rod 42 is ensured to be in contact with the diaphragm 3 after the measuring rod 42 is inserted, and at the moment, the measuring rod 42, the isolator and the diaphragm 3 are both in a vertical state. Meanwhile, two opposite surfaces of the guide gauge 41 and the reference section 422 are circular planes, so that the caliper is convenient to use for measurement, and the measurement accuracy and precision requirements are guaranteed.

By measuring the distance between the reference segment 422 of the measuring rod 42 and the guide gauge 41, the state of the diaphragm 3 can be obtained. If the diaphragm 3 of the isolator is in the neutral state, the standard distance d is obtained, but in practice, the diaphragm 3 of the isolator has a certain deviation from the theoretical neutral state, and if the distance is between d ± Δ d, the state of the diaphragm 3 of the isolator is acceptable. If the distance exceeds d ± Δ d, the condition of the isolator diaphragm 3 is unacceptable and the isolator needs to be refilled to ensure that the condition of the diaphragm 3 is in the neutral position. ± Δ d is the allowable error of the diaphragm 3 from the neutral state.

It is understood that, in other embodiments, reference points for measuring the distance between the reference segments 422 and the guide gauge 41 may be respectively provided on the reference segments 422 and the guide gauge 41, and the distance between the guide gauge 41 and the reference segments 422 may be measured by the reference points. The reference section 422 and the guide gauge 41 may be provided with scale lines, indication lines, and the like to indicate the reference position.

Further, the reference position can be one or a combination of an inner groove, an inner concave hole and a boss, and can be conveniently used as a reference for measurement.

The guide gauge 41 is in threaded fit with the first connecting hole 21, a round hole is designed in the middle of the guide gauge 41, and the measuring rod 42 comprises a reference section 422, a positioning section 4212 and an ejector pin section 4211, so that the perpendicular state of the plane where the measuring rod 42 and the membrane 3 are located during measurement is guaranteed, and the measurement precision is improved.

The isolator diaphragm position measuring device 4 is highly attached to the inner design structure of the isolator, and the measuring operation mode is simple and fast.

The isolator diaphragm position measuring device 4 can not only effectively ensure that the isolator diaphragm 3 is in a middle state after being vacuumized and filled with liquid, but also realize good liquid filling effect, ensure the reliability of the replacement process and reduce the risk of delaying the plan of the major overhaul line; and the accuracy and the stability of the measurement of the important nuclear-grade transmitter are improved.

The isolator diaphragm position measuring device 4 has the main innovation points that:

the high-precision measurement of the offset state of the isolator diaphragm 3 is realized through a guide gauge 41 and a measuring rod 42; meanwhile, the acceptance standard of the pre-filling liquid of the isolator is formulated through the offset of the isolator diaphragm 3.

The upper thread of the guide gauge 41 and the middle guide hole 411 are designed, and the measuring rod 42 comprises a reference section 422, a positioning section 4212 and an ejector pin section 4211, so that the vertical state of the measuring rod 42 and the plane of the membrane 3 during measurement is ensured, and the measurement precision is improved.

It is to be understood that the above-described respective technical features may be used in any combination without limitation.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An isolator diaphragm position measuring device comprises a first base (1), a second base (2) and a diaphragm (3) clamped between the first base (1) and the second base (2), wherein a first connecting hole (21) opposite to the diaphragm (3) is formed in the second base (2), and the isolator diaphragm position measuring device is characterized in that the measuring device (4) comprises a guide gauge (41) and a measuring rod (42);

the guide gauge (41) is detachably connected with the first connecting hole (21), and a guide hole (411) opposite to the first connecting hole (21) is formed in the guide gauge (41);

the measuring rod (42) comprises a measuring section (421), the measuring section (421) is inserted into the guide hole (411), and when the inner end of the measuring section (421) abuts against the diaphragm (3), the position of the diaphragm (3) is obtained through the insertion depth of the measuring rod (42).

2. Isolator diaphragm position measuring device according to claim 1, characterized in that the guide gauge (41) is screwed with the first connection hole (21).

3. The isolator diaphragm position measuring device of claim 1, wherein the measuring section (421) comprises a thimble section (4211) and a positioning section (4212) connected to each other, an outer diameter of the thimble section (4211) being smaller than an outer diameter of the positioning section (4212).

4. An isolator diaphragm position measurement device according to claim 3, wherein the outer diameter of the positioning section (4212) matches the guide hole (411).

5. Isolator diaphragm position measuring device according to claim 3, characterized in that the end of the first connection hole (21) close to the diaphragm (3) comprises a positioning hole section (111) matching the outer diameter of the ejector pin section (4211).

6. The isolator diaphragm position measuring device according to any one of claims 3 to 5, wherein the measuring rod (42) further includes a reference section (422) connected to the measuring section (421), the reference section (422) being spaced opposite to the guide gauge (41) to measure a distance between the guide gauge (41) and the reference section (422).

7. The isolator diaphragm position measuring device according to claim 6, wherein an end of the positioning section (4212) away from the thimble section (4211) is connected to the reference section (422), and an end of the reference section (422) connected to the measuring section (421) is a plane and perpendicular to an axial direction of the measuring rod (42).

8. The isolator diaphragm position measuring device according to claim 7, wherein the guide gauge (41) is screwed with the first connection hole (21), and an end face of the guide gauge (41) is a plane and is perpendicular to an axial direction of the guide hole (411).

9. The isolator diaphragm position measuring device of claim 6, wherein the reference section (422) and the guide gauge (41) are respectively provided with a reference position for measuring a distance therebetween.

10. An isolator diaphragm position measuring device as claimed in claim 9, wherein said reference level is one or a combination of an inner recess, a boss.