CN208506262U - A kind of Radiation monitoring instrument protective device - Google Patents
A kind of Radiation monitoring instrument protective device Download PDFInfo
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- CN208506262U CN208506262U CN201821262329.5U CN201821262329U CN208506262U CN 208506262 U CN208506262 U CN 208506262U CN 201821262329 U CN201821262329 U CN 201821262329U CN 208506262 U CN208506262 U CN 208506262U
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- protective device
- monitoring instrument
- radiation monitoring
- instrument protective
- lower shell
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Abstract
The utility model belongs to nuclear power station maintenance technique field, and in particular to a kind of Radiation monitoring instrument protective device, comprising: ring flange, cover board, wirerope, upper shell and lower shell, the T-shaped structure in the Radiation monitoring instrument protective device section；The ring flange is structure as a whole with upper shell upper end, and upper shell lower end and the welding of lower shell upper end, the ring flange upper surface is bolted with cover board；The lower shell bottom is enclosed construction.This hair buys that method by increasing polyethylene Radiation monitoring instrument protective device inside former guide pipe, detector can be isolated with seawater, make detector and its correlated parts from the corrosion of seawater, effectively reduce the risk that detector crashes into sea.
Description
Technical field
The utility model belongs to nuclear power station maintenance technique field, and in particular to a kind of Radiation monitoring instrument protective device.
Background technique
Certain nuclear power station in order to seawater from real-time monitoring to environmental emission radioactive level, in essential service water technique system
Two immersion type liquid volume activity monitors are provided in seugh.The NaI detector of monitor is sealed in plastics waterproofing
In cover, detector and waterproof cover are mounted in probe guide duct by wirerope, and detector immerses in the seawater, are completed real-time
The radioactive activity of monitoring discharge seawater.
Since detector and its waterproof cover are directly immersed in the seawater, influenced by water flow, repeatedly occur detector and its
Waterproof cover is stuck at guide pipe horn mouth and cannot extract.In addition, probe guide duct regional area is because of corrosion-deformation, periodic check
, which there is detector, in Shi Duoci to be proposed out of guide pipe.After there is above situation, draining can only be entered from manhole by diver
Underdrain could take out detector.After the completion of verification, detector can not be put into guide pipe, and instrument is caused to lose normal monitoring function
Energy.
Therefore it needs to design a kind of nuclear power station essential service water process system discharge outlet radiation monitor in response to this
Table protection device for installing, for solving the disadvantage that the above-mentioned prior art, it is ensured that radiation detector energy normal table operation.
Utility model content
The utility model aim is to provide a kind of Radiation monitoring instrument protective device in view of the above shortcomings of the prior art, is used
The technical issues of being isolated in improving radiation detector with seawater, eliminating influence of the water flow to detector.
The technical solution of the utility model is:
A kind of Radiation monitoring instrument protective device, comprising: ring flange, cover board, wirerope, upper shell and lower shell, it is described
The T-shaped structure in Radiation monitoring instrument protective device section；The ring flange is structure as a whole with upper shell upper end, upper shell lower end
It is welded with lower shell upper end, the ring flange upper surface is bolted with cover board；The lower shell bottom is enclosed construction.
Ring flange as described above and lid surface are equipped with bolt hole, the welding of the upper shell lower end and lower shell upper end
Point interior surface and external surfaces smooth are straight.
Lower shell bottom thickness as described above is greater than barrel surrounding thickness, and upper shell and lower shell are hollow structure.
Ring flange, cover board, upper shell and lower shell as described above use HDPE high-density polyethylene material, specified receiving pressure
Power is not less than 0.6Mpa, and operating temperature range is -15~+50 DEG C.
Lower shell bottom as described above is contacted with seugh bottom, and lower shell lower end length in reserve is the examination of 30cm
Test section.
Cover board lower surface as described above is connected with wirerope.
The utility model has the following beneficial effects:
(1) a kind of Radiation monitoring instrument protective device of the utility model design, application field are the important station-service of nuclear power station
Water conservancy project process system, the method by increasing polyethylene Radiation monitoring instrument protective device inside former guide pipe, can will detect
Device is isolated with seawater, is made detector and its correlated parts from the corrosion of seawater, is effectively reduced detector and crash into sea
Risk.
(2) a kind of Radiation monitoring instrument protective device of the utility model design can effectively avoid proposing detector
Be likely to occur in the process the case where being stuck at former guide pipe horn mouth, facilitate detector maintenance work, ensure that detector
Stable operation and detection efficient.
(3) detector, is suspended on by a kind of Radiation monitoring instrument protective device of the utility model design using wirerope
In new protective device, the depth for keeping detector to immerse seawater is identical as original position, to guarantee that detector detection efficient meets core
Strict demand of the power station to radioactive matter monitoring and control.
(4) a kind of Radiation monitoring instrument protective device of the utility model design, while sufficiently meeting design requirement,
Cost is relatively low, and structure is simple, installs on the spot simple and convenient.
(5) a kind of Radiation monitoring instrument protective device of the utility model design, realizes to important station-service hydraulic art system
The protection of Radiation monitoring instrument of uniting installation, dedicated degree is high, currently without precedent, has very high promotion price in other nuclear power stations
Value.
Detailed description of the invention
Fig. 1 is a kind of Radiation monitoring instrument protective device scheme of installation designed by the utility model；
Fig. 2 is a kind of Radiation monitoring instrument protective device sectional view designed by the utility model；
Fig. 3 is a kind of Radiation monitoring instrument protective device front view designed by the utility model；
Wherein, 1-bolt hole；2-ring flanges；3-upper shells；4-pads；5-lower shells；6-guide pipes；7—
Seugh bottom；8-cover boards；9-wirerope；10-detectors.
Specific embodiment
The utility model technology is described further below:
The utility model is special for nuclear power station scene essential service water process system Radiation monitoring instrument installation region environment
Different property provides a kind of measuring instrument protection device for installing, it can be ensured that instrument avoids radioactive source from losing in the safety in seabed.Together
When, facilitate measuring instrument maintenance work, guarantee the stable operation and detection efficient of detector, to meet nuclear power station to discharge outlet
The strict demand of radioactive matter monitoring and control.
As shown in Figures 1 to 3, a kind of Radiation monitoring instrument protective device, comprising: ring flange 2, cover board 8, wirerope 9, upper cylinder
Body 3 and lower shell 5, the T-shaped structure in the Radiation monitoring instrument protective device section；The ring flange 2 is with 3 upper end of upper shell
Integral structure, 3 lower end of upper shell and the welding of 5 upper end of lower shell, 2 upper surface of ring flange is bolted with cover board 8；The lower shell
5 bottoms are enclosed construction.
The ring flange 2 and 8 surface of cover board are equipped with bolt hole 1, the weldering of 3 lower end of upper shell and 5 upper end of lower shell
4 interior surface of contact and external surfaces smooth are straight.
5 bottom thickness of lower shell is greater than barrel surrounding thickness, it is therefore intended that in the immersed depth for guaranteeing lower shell 5
When, it avoids 5 bottom of lower shell and 7 serious wear of seugh bottom causes seawater into lower shell 5；Upper shell 3 and lower shell 5
For hollow structure.
The ring flange 2, cover board 8, upper shell 3 and lower shell 5 use HDPE high-density polyethylene material, with higher
Intensity and toughness seawater corrosion resistance, specified receiving pressure are not less than 0.6Mpa, and operating temperature range is -15~+50 DEG C.
5 bottom of lower shell is contacted with seugh bottom 7；
Test pressure is not less than 0.3MPa when the being sealed property of Radiation monitoring instrument protective device is tested, after 3 hours
Pressure remains unchanged, No leakage is qualification.
When each Radiation monitoring instrument protective device is processed, the 5 lower end length in reserve of lower shell is the test section of 30cm.
8 lower surface of cover board is connected with wirerope 9.
A kind of installation method of Radiation monitoring instrument protective device, includes the following steps:
Step 1: it is nested inside with Radiation monitoring instrument protective device in guide pipe 6；
Step 2: 5 bottom of lower shell of Radiation monitoring instrument protective device is inserted into basin bottom, with seugh bottom
7 are in close contact, and Radiation monitoring instrument protective device top is fixed by ring flange 2；
Step 3: wirerope 9 is fixed on 8 lower surface of cover board of Radiation monitoring instrument protective device, removes detector 10
Detector 10 is suspended on inside Radiation monitoring instrument protective device using wirerope 9, is isolated with seawater by waterproof outer cover；It keeps
The depth that detector 10 immerses seawater is identical as original position, it is ensured that 10 detection efficient of detector meets nuclear power station to radioactive substance
The strict demand of monitoring and control.
The utility model is explained in detail above in conjunction with embodiment, but the utility model is not limited to above-mentioned implementation
Example, within the knowledge of a person skilled in the art, can also be in the premise for not departing from the utility model aims
It is lower that various changes can be made.The content being not described in detail in the utility model can use the prior art.
Claims (6)
1. a kind of Radiation monitoring instrument protective device, it is characterised in that: include: ring flange (2), cover board (8), wirerope (9), on
Cylinder (3) and lower shell (5), the T-shaped structure in the Radiation monitoring instrument protective device section；The ring flange (2) and upper cylinder
Body (3) upper end is structure as a whole, and upper shell (3) lower end and the welding of lower shell (5) upper end, ring flange (2) upper surface is spirally connected
There are cover board (8)；Lower shell (5) bottom is enclosed construction.
2. a kind of Radiation monitoring instrument protective device as described in claim 1, it is characterised in that: the ring flange (2) and lid
Plate (8) surface is equipped with bolt hole (1), pad (4) interior surface of upper shell (3) lower end and lower shell (5) upper end
It is straight with external surfaces smooth.
3. a kind of Radiation monitoring instrument protective device as claimed in claim 2, it is characterised in that: lower shell (5) bottom
Thickness is greater than barrel surrounding thickness, and upper shell (3) and lower shell (5) are hollow structure.
4. a kind of Radiation monitoring instrument protective device as claimed in claim 3, it is characterised in that: the ring flange (2), cover board
(8), upper shell (3) and lower shell (5) use HDPE high-density polyethylene material, and specified receiving pressure is not less than 0.6Mpa, work
Making temperature range is -15~+50 DEG C.
5. a kind of Radiation monitoring instrument protective device as claimed in claim 4, it is characterised in that: lower shell (5) bottom
It is contacted with seugh bottom (7), lower shell (5) the lower end length in reserve is the test section of 30cm.
6. a kind of Radiation monitoring instrument protective device as described in claim 1, it is characterised in that: cover board (8) lower surface
It is connected with wirerope (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821262329.5U CN208506262U (en) | 2018-08-07 | 2018-08-07 | A kind of Radiation monitoring instrument protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821262329.5U CN208506262U (en) | 2018-08-07 | 2018-08-07 | A kind of Radiation monitoring instrument protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208506262U true CN208506262U (en) | 2019-02-15 |
Family
ID=65300328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821262329.5U Active CN208506262U (en) | 2018-08-07 | 2018-08-07 | A kind of Radiation monitoring instrument protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208506262U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828652A (en) * | 2018-08-07 | 2018-11-16 | 江苏核电有限公司 | A kind of Radiation monitoring instrument protective device and its installation method |
-
2018
- 2018-08-07 CN CN201821262329.5U patent/CN208506262U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828652A (en) * | 2018-08-07 | 2018-11-16 | 江苏核电有限公司 | A kind of Radiation monitoring instrument protective device and its installation method |
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