CN110310879A - The waterproof enclosure of dynode photomultiplier tube - Google Patents
The waterproof enclosure of dynode photomultiplier tube Download PDFInfo
- Publication number
- CN110310879A CN110310879A CN201910508024.0A CN201910508024A CN110310879A CN 110310879 A CN110310879 A CN 110310879A CN 201910508024 A CN201910508024 A CN 201910508024A CN 110310879 A CN110310879 A CN 110310879A
- Authority
- CN
- China
- Prior art keywords
- metal
- photomultiplier tube
- casting glue
- dynode
- chock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/02—Tubes in which one or a few electrodes are secondary-electron emitting electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/04—Electron multipliers
- H01J43/28—Vessels, e.g. wall of the tube; Windows; Screens; Suppressing undesired discharges or currents
Abstract
The invention discloses a kind of waterproof enclosure of dynode photomultiplier tube, including metal-back, encapsulating shell, the first chock, the second chock and casting glue, the metal-back is the band bottom straight tube structure of up big and down small variable diameter；The encapsulating cage is located in the metal-back, and first chock lower end is erected on the step of the metal-back through structure glue, and upper end is flexible coupling with the dynode photomultiplier transit bottom of the tube, and the metal-back is divided into two chambers up and down.The metal-back for accommodating dynode photomultiplier transit bottom of the tube, the interior casting glue being equipped with the soft contact of dynode extension is arranged in the present invention, and casting glue encapsulating in open environment avoids the formation of bubble；Sealant is coated in outside again.This encapsulation can fight each other to avoid hydraulic pressure and take the direct effect of pole photomultiplier tube bottom extension, prevent conquassation glass；Good water-proof effect, stable structure simultaneously, enable product long-term work under water.
Description
Technical field
The present invention relates to the encapsulation technology field of photomultiplier tube, especially a kind of anti-water seal of dynode photomultiplier tube
Dress.
Background technique
Photomultiplier tube is the vacuum electron device that faint optical signal is converted into electric signal.Photomultiplier tube is used in optics
In measuring instrument and spectrometric instrument.Photomultiplier transit bottom of the tube, which needs to connect divider, to be worked normally.The function of divider
Can on the one hand power to photomultiplier tube, on the other hand draw the electric signal from photomultiplier tube, and pass through cable transfer
It is measured to read-out electronics.When photomultiplier tube is in water, need to photomultiplier tube tail portion (including divider portion
Point) waterproof enclosure is done, guarantee that the photomultiplier tube with divider can work normally under water.
The encapsulation of traditional dynode photomultiplier tube generallys use the molding plastic shell of integral molded plastic and photomultiplier transit
Pipe tail portion is flexible coupling, at cable outlet toward being sealed to divider by way of cavity encapsulating.Its disadvantage shows themselves in that glue exists
It will form bubble in cavity, it is poorly sealed close；.This structure not pressure-bearing simultaneously can not protect fragile signal to draw glass stem
Part uses the risk for having pressure break glass in deep water.
In Jiangmen neutrino experiment project, 5000 20 inches of photomultiplier tubes based on dynode structure will be used,
It is placed in the pure water of 45 meters of depths and works 20 years, it is therefore desirable to which preventing divider from contacting with water causes to fail, while to protect
Signal draws glass stem part, prevents hydraulic pressure from generating destruction to it.
Summary of the invention
The present invention proposes a kind of waterproof enclosure of dynode photomultiplier tube, so that photomultiplier tube packaging effect is good, property
It can stablize.
In order to achieve the above-mentioned object of the invention, the present invention is the following technical schemes are provided: a kind of dynode photomultiplier tube is prevented
Water seal dress, including metal-back, encapsulating shell, the first chock, the second chock and casting glue, the encapsulating cage are located at the metal-back
Interior, first chock lower end is erected on the step of the metal-back through structure glue, upper end and the dynode photomultiplier transit
Bottom of the tube is flexible coupling；The metal-back is divided into two chambers up and down；The casting glue includes the first casting glue and the second encapsulating
Glue, first casting glue are filled in the encapsulating shell, and second casting glue is filled in the upper chamber of the metal-back,
Second chock is located in the upper chamber.
Preferably, second casting glue includes that elastic casting glue and structure casting glue, the structure casting glue are located at institute
It states below elastic casting glue, and is not higher than first chock.
Preferably, the waterproof enclosure further includes sealant, and the sealant coats the metal-back top, described beat is taken
The lower part of pole photomultiplier tube and the junction of the two.
Preferably, the sealant includes waterproof layer and separation layer, and the separation layer is coated on outside the waterproof layer.
Preferably, the separation layer is pyrocondensation tube layer.
Preferably, the wiring board connecting with the dynode photomultiplier tube is embedded in first casting glue.
Preferably, the metal-back is the band bottom straight tube structure of up big and down small variable diameter, and lower sides are equipped with cable fairlead.
Preferably, the cable fairlead is higher than the metal-back bottom.
Preferably, second chock is located between second casting glue and the sealant.
Preferably, elastic gum is equipped between the upper end of first chock and the dynode photomultiplier transit bottom of the tube.
Compared with prior art, the invention has the following advantages that setting accommodates the metal of dynode photomultiplier transit bottom of the tube
Shell, the interior casting glue being equipped with the soft contact of dynode extension, casting glue encapsulating in open environment avoid the formation of gas
Bubble, then sealant is coated in outside.This encapsulation can fight each other to avoid hydraulic pressure and take the direct of pole photomultiplier tube bottom extension
Effect prevents conquassation glass；Good water-proof effect, stable structure simultaneously, enable product long-term work under water.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of the waterproof enclosure of dynode photomultiplier tube of the invention；
Diagram label:
1, metal-back；10, dynode photomultiplier tube；2, encapsulating shell；3, the first casting glue；4, the second casting glue；41, bullet
Property part；42, high intensity part；5, elastic gum；51, structure glue；6, wiring board；7, the first chock；71, the second chock；8, close
Sealing；81, waterproof layer；82, separation layer；9, cable fairlead.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.Obviously, described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that if relating to directionality instruction (such as up, down, left, right, before and after ...) in the embodiment of the present invention,
Then directionality instruction be only used for explain under a certain particular pose (as shown in the picture) between each component relative positional relationship,
Motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, being somebody's turn to do " first ", " second " etc. if relating to the description of " first ", " second " etc. in the embodiment of the present invention
Description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated skill
The quantity of art feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy
Sign.It in addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution
Conjunction is not present, also not the present invention claims protection scope within.
As shown in Figure 1, a kind of waterproof enclosure of the photomultiplier tube based on 10 structure of dynode photomultiplier tube, including gold
Belong to shell 1, encapsulating shell 2, the first chock 7, the second chock 71 and casting glue, the encapsulating shell 2 to be erected in the metal-back 1, institute
It states 10 bottom of dynode photomultiplier tube to be inserted into the metal-back 1, the platform of the metal-back 1 is shelved on through first chock
On rank 2；First chock is flexible coupling with dynode photomultiplier tube by elastic gum, with metal-back by Structure Glue into
Row connection；The metal-back 1 is divided for upper and lower two chambers；The casting glue includes the first casting glue 3 and the second casting glue 4,
First casting glue 3 is filled in the encapsulating shell 2, and second casting glue 4 is filled in the upper chamber of the metal-back 1
It is interior；
Second chock 71 is ring-type, is erected at 1 top edge of metal-back, is particularly located at metal-back 1 and elastic part 41
Between, the transition portion between metal-back 1 and 10 glass bulb of dynode photomultiplier tube is formed, subsequent outer envelope, shape are conducive to
At complete separation layer 82.
The air exercise of metal-back 1 takes photomultiplier tube 10 bottom in pole to play reinforcement firm effect, facilitates dynode photomultiplier tube
10 are attached with wiring board 6；Encapsulating shell 2 is set in metal-back 1, and wiring board 6 is located in encapsulating shell 2, while in encapsulating shell 2
The first casting glue 3 is filled, the electrode to wiring board 6 and its between photomultiplier tube 10 carries out waterproof sealing, prevents water by light
Electric 10 bottom of multiplier tube enters.
Based on 10 bottom structure feature of dynode photomultiplier tube, dynode photomultiplier tube 10 is located at through the first chock 7
On encapsulating shell 2, it especially is equipped with bonded adhesives 5 in the upper and lower sides of the first chock 7, improves dynode photomultiplier tube 10 and first
The connective stability of wiring board 6 in casting glue 3.
In addition it is filled with the second casting glue 4 between 1 top of metal-back and dynode photomultiplier tube 10, is herein dynode
The glass bulb lower part of photomultiplier tube 10 seals due to being filled by the second casting glue 4, water is avoided thus to enter dynode photomultiplier transit
The bottom of pipe 10.
In conclusion the stable frame provided by metal-back 1, in conjunction with the filling of casting glue at two, so that dynode
10 bottom of photomultiplier tube is preferably encapsulated, and water is avoided to enter.
Wherein encapsulating shell 2 is made of ABS plastic.
Second casting glue 4 includes elastic part 41 and high intensity part 42, and the high intensity part 42 is located at the elasticity
It is viscous to carry out structure encapsulating for being filled between the first chock 7 and metal-back 1 for 41 lower section of part, 42 casting glue of high intensity part
It connects, plays the role of structure to whole sealing structure and fix, fill sealing.And 41 casting glue of elastic part is filled in metal-back
Between 1 and the glass bulb of dynode photomultiplier tube 10, excessive seal connection is carried out.
Waterproof enclosure further includes sealant 8, and the sealant 8 coats 1 top of metal-back, the dynode photoelectricity times
Increase the lower part of pipe 10 and the junction of the two.The sealant 8 includes waterproof layer 81 and separation layer 82, and the separation layer 82 wraps
It overlays on outside the waterproof layer 81.The separation layer 82 is pyrocondensation tube layer.Specifically, by the butyl rubber belt and separation layer of waterproof layer 81
82 two layers of heat-shrink tube composition, butyl rubber belt is the basic waterproof material of entire 10 waterproof sealing of dynode photomultiplier tube, will
Extraneous liquid medium completely cuts off completely with internal structure.Heat-shrink tube fixes butyl rubber belt and shell, and pure water and butyl is isolated
Adhesive tape avoids pollution external agency.
The wiring board 6 connecting with the dynode photomultiplier tube 10 is embedded in first casting glue 3, for being beaten
It powers by pole photomultiplier tube 10, so that dynode photomultiplier tube 10 works, and draws 10 signal of dynode photomultiplier tube.
The metal-back 1 is up big and down small variable diameter band bottom straight tube structure, and lower sides are equipped with cable fairlead 9；It is preferred that
, the cable fairlead 9 is higher than 1 bottom of metal-back.
This waterproof enclosure is suitable for the waterproof enclosure of dynode photomultiplier tube 10, it is desirable that failure rate is less than in 6 years
0.5%, it is much better than traditional 10 waterproof enclosure of photomultiplier tube.
The production method of this waterproof enclosure the following steps are included:
1. being inserted in the second chock 71 at 10 neck of dynode photomultiplier tube；
2. the first chock 7 is Nian Jie with dynode photoelectricity times monk 10 bottoms of pipe by flexible glue；
3. the pin of wiring board 6 and 10 bottom of dynode photomultiplier tube is welded in 6 lower section of cable welding assist side；
4. the cover of encapsulating shell 2 is clasped wiring board 6, the first casting glue 3 is filled into ABS encapsulating shell 2；
5. being adhered to 7 bottom of the first chock by encapsulating shell 2, lower section puts on metal-back 1, while passing through bonded adhesives for metal-back
1 carries out be bonded with the first chock 7, makes photomultiplier tube, the first chock 7 and metal-back 1 form an entirety；
6. being filled with high-intensitive casting glue in the hole between 1 top of metal-back and the first chock 7；
7. the second chock 71 is connected with metal-back by the method that adhesive tape is wound, elastic casting glue is poured into；
8. butyl rubber belt is wound, it is inserted in heat-shrink tube, is blown to contraction with heat gun.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of waterproof enclosure of dynode photomultiplier tube, it is characterised in that: including metal-back (1), encapsulating shell (2), first
Chock (7), the second chock (71) and casting glue, the metal-back (1) are the band bottom straight tube structure of up big and down small variable diameter；The filling
Rubber shell (2) is erected in the metal-back (1), and the first chock (7) lower end is erected at the metal-back through structure glue (5)
(1) on step, upper end is flexible coupling with dynode photomultiplier tube (10) bottom, and the metal-back (1) is divided into up and down
Two chambers；The casting glue includes the first casting glue (3) and the second casting glue (4), and first casting glue (3) is filled in institute
It states in encapsulating shell (2), second casting glue (4) is filled in the upper chamber of the metal-back (1), second chock (71)
It is located in the upper chamber.
2. the waterproof enclosure of dynode photomultiplier tube according to claim 1, it is characterised in that: second casting glue
It (4) include elastic casting glue and structure casting glue, the structure casting glue is located at below the elastic casting glue, and is not higher than institute
State the first chock.
3. the waterproof enclosure of dynode photomultiplier tube according to claim 1, it is characterised in that: the waterproof enclosure also wraps
It includes sealant (8), the sealant (8) coats the lower part on metal-back (1) top, the dynode photomultiplier tube (10)
And the junction of the two.
4. the waterproof enclosure of dynode photomultiplier tube according to claim 3, it is characterised in that: sealant (8) packet
Waterproof layer (81) and separation layer (82) are included, the separation layer (82) is coated on the waterproof layer (81) outside.
5. the waterproof enclosure of dynode photomultiplier tube according to claim 4, it is characterised in that: the separation layer (82) is
Pyrocondensation tube layer.
6. the waterproof enclosure of dynode photomultiplier tube according to claim 1, it is characterised in that: first casting glue
(3) wiring board (6) connecting with the dynode photomultiplier tube (10) is embedded in.
7. the waterproof enclosure of dynode photomultiplier tube according to claim 1, it is characterised in that: under the metal-back (1)
Portion's side wall is equipped with cable fairlead (9).
8. the waterproof enclosure of dynode photomultiplier tube according to claim 7, it is characterised in that: the cable fairlead
(9) it is higher than the metal-back (1) bottom.
9. the waterproof enclosure of dynode photomultiplier tube according to claim 3, it is characterised in that: second chock (71)
It is located between second casting glue (4) and the sealant (8).
10. the waterproof enclosure of dynode photomultiplier tube according to claim 1, it is characterised in that: first chock
Elastic gum (51) are equipped between upper end and the dynode photomultiplier tube (10) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910508024.0A CN110310879B (en) | 2019-06-12 | 2019-06-12 | Waterproof encapsulation of dynode photomultiplier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910508024.0A CN110310879B (en) | 2019-06-12 | 2019-06-12 | Waterproof encapsulation of dynode photomultiplier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110310879A true CN110310879A (en) | 2019-10-08 |
| CN110310879B CN110310879B (en) | 2020-07-17 |
Family
ID=68076488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910508024.0A Active CN110310879B (en) | 2019-06-12 | 2019-06-12 | Waterproof encapsulation of dynode photomultiplier |
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| Country | Link |
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| CN (1) | CN110310879B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111564359A (en) * | 2020-05-14 | 2020-08-21 | 中国科学院高能物理研究所 | Waterproof packaging device and packaging method |
| CN111968906A (en) * | 2020-09-14 | 2020-11-20 | 中国科学院高能物理研究所 | Oil-proof packaging structure of photomultiplier, photomultiplier and oil-proof packaging method |
| CN113327835A (en) * | 2020-09-29 | 2021-08-31 | 湖南博大光电科技有限公司 | Waterproof device for photomultiplier |
| CN113555271A (en) * | 2021-05-21 | 2021-10-26 | 闫琪明 | Sealing waterproof device for photomultiplier |
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| CN102110575A (en) * | 2011-02-23 | 2011-06-29 | 公安部第三研究所 | Photomultiplier installation protection structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111564359A (en) * | 2020-05-14 | 2020-08-21 | 中国科学院高能物理研究所 | Waterproof packaging device and packaging method |
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| CN111968906B (en) * | 2020-09-14 | 2021-07-06 | 中国科学院高能物理研究所 | Oil-proof packaging structure of photomultiplier, photomultiplier and oil-proof packaging method |
| CN113327835A (en) * | 2020-09-29 | 2021-08-31 | 湖南博大光电科技有限公司 | Waterproof device for photomultiplier |
| CN113555271A (en) * | 2021-05-21 | 2021-10-26 | 闫琪明 | Sealing waterproof device for photomultiplier |
| CN113555271B (en) * | 2021-05-21 | 2024-04-19 | 闫琪明 | Sealing waterproof device for photomultiplier |
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| Publication number | Publication date |
|---|---|
| CN110310879B (en) | 2020-07-17 |
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