CN211062475U - Pressure monitoring and adjusting device for electrical penetration assembly of nuclear power plant - Google Patents
Pressure monitoring and adjusting device for electrical penetration assembly of nuclear power plant Download PDFInfo
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- CN211062475U CN211062475U CN201921823528.3U CN201921823528U CN211062475U CN 211062475 U CN211062475 U CN 211062475U CN 201921823528 U CN201921823528 U CN 201921823528U CN 211062475 U CN211062475 U CN 211062475U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
A pressure monitoring and regulating device for a nuclear power plant electrical penetration. The pressure monitoring and adjusting device comprises a connecting pipeline, a pressure regulating valve, a protection device, a high-precision pressure gauge and a gas storage tank; the connecting pipeline comprises a plurality of pressure outlet ends and a pressure inlet end, each pressure outlet end is used for being connected with an instrument joint of one electric penetration piece, and the pressure inlet end is communicated with the pressure regulating valve; the pressure regulating valve is communicated with the protection device; the protection device is communicated with the gas storage tank; the gas storage tank is filled with nitrogen; the high-precision pressure gauge is arranged between the protection device and the gas storage tank. The air-vent valve utilizes differential pressure automatic to supply air to the electric penetration piece of which the internal pressure is less than the specified value, and simultaneously, the pressure gauge which is arranged on the air-vent valve and used for monitoring the downstream gas pressure can monitor the internal pressure of a plurality of electric penetration pieces in a unified way, thereby greatly saving the labor cost and the time cost and reducing the industrial safety risk.
Description
Technical Field
The utility model relates to a nuclear power plant safety technical field, concretely relates to nuclear power plant's containment safety technical field, more specifically, relate to a pressure monitoring and adjusting device for nuclear power plant's electric through-member.
Background
A large number (generally 79) of electrical penetration pieces (including medium-voltage electrical penetration pieces, low-voltage control and low-voltage instrument penetration pieces) are arranged on a reactor containment structure of a nuclear power plant, each electrical penetration piece comprises a sealing cylinder and an insulating core rod wrapped in the sealing cylinder, and during normal operation, the sealing cylinder is filled with nitrogen, and the internal pressure is maintained within a specified pressure range.
At present, in order to ensure that the internal pressure of the electrical penetration pieces meets the requirements, a pressure gauge with the accuracy of 1.0 level is generally arranged on one side of each electrical penetration piece close to the outer wall of the containment to monitor the pressure in a sealing cylinder of the corresponding electrical penetration piece in real time, and when the internal pressure of one electrical penetration piece is found to be smaller than a specified value, the electrical penetration piece needs to be manually supplemented with nitrogen. The prior means have the following disadvantages: 1) great manpower and time are consumed for respectively carrying out frequent pressure tracking on 79 electric penetration pieces and carrying out nitrogen supplement on the penetration pieces with internal pressure smaller than a specified value; 2) because the electrical penetration piece is basically installed in a narrow space area, the operation of manually supplementing nitrogen has industrial safety risks such as suffocation of operators and the like; 3) the instrument precision of monitoring pressure is lower, and 79 online instruments do not check up, and the accuracy is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that, to the above-mentioned problem of existence among the prior art, provide a pressure monitoring and adjusting device for nuclear power plant's electric penetration piece, it can unify the monitoring to the internal pressure of a plurality of electric penetration pieces to utilize differential pressure to carry out the tonifying qi to the electric penetration piece that internal pressure is less than the specified value automatically, thereby very big human cost and the time cost of having saved have reduced the industry safety risk.
In order to solve the technical problem, the technical scheme adopted by the utility model is to provide a pressure monitoring and adjusting device for an electrical penetration assembly of a nuclear power plant, wherein the pressure monitoring and adjusting device comprises a connecting pipeline, a pressure regulating valve, a protection device, a high-precision pressure gauge and a gas storage tank; the connecting pipeline comprises a plurality of pressure outlet ends and a pressure inlet end communicated with the plurality of pressure outlet ends, each pressure outlet end is used for being connected with an instrument joint of one electric penetration piece, and the pressure inlet end is communicated with an air outlet of the pressure regulating valve; the air inlet of the pressure regulating valve is communicated with the air outlet of the air storage tank; the gas storage tank is filled with nitrogen; the high-precision pressure gauge is arranged at the air outlet end of the air storage tank and used for measuring the air pressure in the air storage tank.
The utility model provides an among pressure monitoring and adjusting device for electrical penetration piece of nuclear power plant, pressure monitoring and adjusting device still including install in the air-vent valve with protection device between the gas holder, protection device's gas outlet and income gas port respectively with the income gas port of air-vent valve with the gas outlet intercommunication of gas holder.
The utility model provides an among the pressure monitoring and adjusting device for electric penetration piece of nuclear power plant, protection device includes relief pressure valve and/or check valve.
The utility model provides an among the pressure monitoring and adjusting device for nuclear power plant's electric through-going member, connecting line includes pressure outlet end's quantity is 79.
The utility model provides an among the pressure monitoring and the adjusting device for nuclear power plant's electric penetration piece, the connecting pipe route comprises many pressure lines.
The utility model provides an among the pressure monitoring and adjusting device that is used for the electric penetration piece of nuclear power plant, the pressure pipeline is world Weiluoke FM series rigid hose.
The utility model provides an among the pressure monitoring and the adjusting device that are used for the electrical penetration piece of nuclear power plant, the air-vent valve is the formula of relying on oneself pressure air-vent valve.
The utility model provides an among the pressure monitoring and the adjusting device for electrical penetration piece of nuclear power plant, the precision of the manometer of air-vent valve is higher than 1.0.
Implement the utility model provides a pressure monitoring and adjusting device for nuclear power plant's electric penetration piece can reach following beneficial effect at least: the pressure monitoring and adjusting device comprises a connecting pipeline, a pressure regulating valve, a protecting device, a high-precision pressure gauge and a gas storage tank; the connecting pipeline comprises a plurality of pressure outlet ends and a pressure inlet end communicated with the plurality of pressure outlet ends, each pressure outlet end is used for being connected with an instrument joint of one electric penetration piece, and the pressure inlet end is communicated with an air outlet of the pressure regulating valve; the air inlet of the pressure regulating valve is communicated with the air outlet of the protection device; the air inlet of the protection device is communicated with the air storage tank; the gas storage tank is filled with nitrogen; the high-precision pressure gauge is arranged between the protection device and the gas storage tank. It can monitor the internal pressure of a plurality of electric penetration pieces in unison to utilize differential pressure automatic to make up air to the electric penetration piece that internal pressure is less than the specified value, thereby very big saving human cost and time cost, reduced the industry safety risk.
Drawings
Fig. 1 is a reference diagram of the usage status of the pressure monitoring and adjusting device according to the preferred embodiment of the present invention.
Detailed description of the embodiments reference is made to the accompanying drawings in which:
| connecting |
1 | Pressure regulating valve | 2 |
| |
3 | High-precision pressure gauge | 4 |
| Gas storage tank | 5 | First |
11 |
| |
6 | Second |
12 |
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. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in FIG. 1, a preferred embodiment of a pressure monitoring and regulating device for a nuclear power plant electrical penetration 6 is provided.
Firstly, it should be emphasized that the pressure monitoring and regulating device is mainly designed for the third barrier of the containment vessel of the nuclear power plant, namely, the completeness monitoring of the containment vessel, and is generally applicable to the pressure monitoring system of the cable penetration (i.e., the electrical penetration 6) of the nuclear power plant at home and abroad.
The pressure monitoring and adjusting device comprises a connecting pipeline 1, a pressure regulating valve 2, a protection device 3, a high-precision pressure gauge 4 and a gas storage tank 5; the connecting pipeline 1 comprises a plurality of pressure outlet ends and a pressure inlet end communicated with the plurality of pressure outlet ends, each pressure outlet end is used for being connected with an instrument joint of one electric penetration piece 6, and the pressure inlet end is communicated with an air outlet of the pressure regulating valve 2; the air inlet of the pressure regulating valve 2 is communicated with the air outlet of the protection device 3; the air inlet of the protection device 3 is communicated with the air storage tank 5; the gas storage tank 5 is filled with nitrogen; the high-precision pressure gauge 4 is arranged between the protection device 3 and the gas storage tank 5.
In this embodiment, the gas holder 5 is a fixed nitrogen gas holder 5, and nitrogen gas is filled in the gas holder 5, and the gas holder 5 is required to be fixed in a position or an area where an operator can easily reach, so as to facilitate regular inspection and maintenance.
In this embodiment, the connecting pipeline 1 includes 79 pressure outlet ports. Because there are a large number of electrical penetrations 6 on the reactor containment structure of a nuclear power plant, the number is typically 79. Of course, the number of pressure outlet ends of the connecting line 1 can be determined by the skilled person according to the actual situation.
In this embodiment, the connection pipeline 1 is composed of a plurality of pressure leading pipelines. Specifically, the pressure regulating valve comprises 79 first pressure leading pipelines 11, one ends of which are respectively connected with instrument joints of 79 electric penetration pieces 6, and a second pressure leading pipeline 12, wherein the second pressure leading pipeline 12 is simultaneously communicated with the 79 first pressure leading pipelines 11, and one end of the second pressure leading pipeline 12 is communicated with an air outlet of the pressure regulating valve 2.
In this embodiment, the pressure line is a shiviaoke FM series rigid hose.
In this embodiment, the pressure regulating valve 2 is a self-operated pressure regulating valve, and the accuracy of a pressure gauge on the pressure regulating valve 2 is higher than 1.0. Specifically, the self-operated pressure regulating valve adopts a ZZY type self-operated pressure regulating valve of Zhejiang three-side control valve, Inc., no external power supply is needed, the energy of the medium to be regulated is used as a power source, an actuating mechanism is introduced to control the position of a valve core to change the flow area and change the pressure difference at two ends, and therefore the pressure behind the valve is stabilized at a given value. The pressure regulating valve 2 and the pressure leading pipeline can be connected in a welding or flange connection mode.
In this embodiment, the precision of the high-precision pressure gauge 4 is 0.1%.
In this embodiment, the protection device 3 is a pressure reducing valve. When the pressure in the air storage tank 5 is too high to exceed the regulation range of the pressure regulating valve 2, the protection device 3 can pre-reduce the pressure in the air storage tank 5, so as to protect the pressure regulating valve 2 and the whole pressure monitoring and regulating device. Of course, in other embodiments, the protection device 3 may further include a non-return valve, so that the protection device 3 may also function to prevent the nitrogen gas in the connecting line 1 from flowing backwards.
When the pressure monitoring and adjusting device is used, firstly, 79 pressure outlet ends of the connecting pipeline 1 are respectively connected with 79 electrical penetration pieces 6 on a containment structure of a nuclear power plant, and then the pressure of nitrogen in the gas storage tank 5 is adjusted to a set value pressure by using the pressure adjusting valve 2. Therefore, 79 pieces of internal pressure of the electric penetration assembly 6 of a single unit can meet the requirements of the supervision outline by only regularly observing the reading of the pressure gauge on the pressure regulating valve 2 and regularly inspecting and maintaining the gas storage tank 5 according to the reading of the high-precision pressure gauge 4. In addition, the pressure regulating valve 2 can automatically supplement air according to the difference between the pressure drop of the internal pressure of the electric penetration piece 6 communicated with the pressure regulating valve and the set value, and the valve automatically closes to stop supplementing air after the pressure of the supplementing air reaches the set value.
It is proved by practical examination that by adopting the pressure monitoring and regulating device provided by the present embodiment: the tightness of the electric penetration assembly 6 is tested periodically every quarter and every fuel cycle, and 1.5h of working time can be saved each time; the nitrogen supplement operation can be completely replaced by an automatic gas supplement device; a conservative estimate of the time it takes to make an electrical penetration 6 reading during the containment crush test may save 1 h. In conclusion, the safety and the economical efficiency of the monitoring and maintenance operation of the electric penetration piece 6 on the containment structure of the nuclear power plant can be greatly improved by adopting the pressure monitoring and adjusting device provided by the embodiment.
Implement the utility model provides a pressure monitoring and adjusting device has following beneficial effect:
1. the pressure monitoring and adjusting device can monitor the internal pressure of the electric penetration pieces 6 in a unified mode, one to many pressure gauges of the electric penetration pieces 6 are not needed to read during a containment vessel pressurization test, and only the numerical value of the pressure regulating valve 2 needs to be read, so that a large amount of time is saved.
2. The pressure monitoring and adjusting device utilizes differential pressure to automatically supplement air for the electric penetration piece 6 with the internal pressure smaller than the specified value through the pressure regulating valve 2, thereby greatly saving the labor cost and the time cost and reducing the industrial safety risk.
3. The gas storage tank 5 can be fixed in a position or an area which can be easily reached by an operator, so that the operation in a narrow space is reduced, the risks of treading of finished products, collision of the operator and suffocation can be avoided, and the industrial safety risk is reduced.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (8)
1. A pressure monitoring and adjusting device for an electrical penetration assembly of a nuclear power plant is characterized by comprising a connecting pipeline, a pressure regulating valve, a protection device, a high-precision pressure gauge and a gas storage tank; the connecting pipeline comprises a plurality of pressure outlet ends and a pressure inlet end communicated with the plurality of pressure outlet ends, each pressure outlet end is used for being connected with an instrument joint of one electric penetration piece, and the pressure inlet end is communicated with an air outlet of the pressure regulating valve; the air inlet of the pressure regulating valve is communicated with the air outlet of the air storage tank; the gas storage tank is filled with nitrogen; the high-precision pressure gauge is arranged at the air outlet end of the air storage tank and used for measuring the air pressure in the air storage tank.
2. The pressure monitoring and regulating device for a nuclear power plant electrical penetration of claim 1, further comprising a protective device mounted between the pressure regulating valve and the air reservoir, wherein an air outlet and an air inlet of the protective device are in communication with an air inlet of the pressure regulating valve and an air outlet of the air reservoir, respectively.
3. The pressure monitoring and regulating device for a nuclear power plant electrical penetration of claim 2, wherein the protective device comprises a pressure relief valve and/or a check valve.
4. The pressure monitoring and regulating device for a nuclear power plant electrical penetration of claim 1, wherein the connecting line includes 79 of the pressure outlet ports.
5. The pressure monitoring and regulating device for a nuclear power plant electrical penetration according to claim 1, wherein the connecting line is comprised of a plurality of pressure lead lines.
6. The pressure monitoring and regulating device for a nuclear power plant electrical penetration according to claim 5, wherein the pressure line is a Shiviaoke FM series rigid hose.
7. The pressure monitoring and regulating device for a nuclear power plant electrical penetration of claim 1, wherein the pressure regulating valve is a self-operated pressure regulating valve.
8. The pressure monitoring and regulating device for a nuclear power plant electrical penetration of claim 1, wherein the accuracy of the pressure gauge of the pressure regulating valve is higher than 1.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921823528.3U CN211062475U (en) | 2019-10-28 | 2019-10-28 | Pressure monitoring and adjusting device for electrical penetration assembly of nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921823528.3U CN211062475U (en) | 2019-10-28 | 2019-10-28 | Pressure monitoring and adjusting device for electrical penetration assembly of nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211062475U true CN211062475U (en) | 2020-07-21 |
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ID=71593435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921823528.3U Active CN211062475U (en) | 2019-10-28 | 2019-10-28 | Pressure monitoring and adjusting device for electrical penetration assembly of nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211062475U (en) |
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2019
- 2019-10-28 CN CN201921823528.3U patent/CN211062475U/en active Active
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