CN202259157U - Counting tube - Google Patents
Counting tube Download PDFInfo
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- CN202259157U CN202259157U CN2011203715370U CN201120371537U CN202259157U CN 202259157 U CN202259157 U CN 202259157U CN 2011203715370 U CN2011203715370 U CN 2011203715370U CN 201120371537 U CN201120371537 U CN 201120371537U CN 202259157 U CN202259157 U CN 202259157U
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- negative electrode
- tube body
- sheet metal
- metal
- metal sheet
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Abstract
The utility model discloses a counting tube including a negative electrode, a positive electrode, a negative electrode lead and a tube body made of glass. The tube body is in a cylindrical shape and the inner part of the tube body is an empty cavity. The empty cavity is provided with gas. The positive electrode is a metal conducting wire. The metal conducting wire goes into the tube body from an external side of one end of the tube body and extends to an inner side of the other end of the tube body. It is characterized in that the negative electrode is a metal sheet in a curly shape. The metal sheet is coated on the wall face of the empty cavity of the tube body. Intersection parts of the metal sheet overlap mutually. The metal sheet is made of metal having no radiation shielding function. One end of the negative electrode lead connects with the metal sheet fixedly while the other end of the negative electrode lead is disposed outside the tube body. The counting tube in the above structure has improved working stability and a prolonged service lifetime. And the occurrence of a light sensation phenomenon can be reduced and even eliminated.
Description
Technical field
The utility model relates to a kind of counter tube, in particular for detecting the counter tube of amount of radiation.
Background technology
In existing counter tube, counter tube comprises being and comprises negative electrode, anode, cathode wire and body.Body is processed by glass, is cylindric, and body inside is cavity.In the cavity of body, spray into the stannous chloride steam, form the layer of transparent metallic film at a certain temperature, this metallic film is negative electrode.Cathode wire penetrates in the body.One end of this cathode wire is connected with metallic film, and the other end is positioned at the body outside.Anode is a wire guide, and this wire guide penetrates body from the outside of body one end, and extends to the inboard of the body other end, and anode is positioned at the center of body, promptly is positioned on the axis of body.Use the metallic film of this structure to make the counter tube of negative electrode, counter tube exists metallic film and the loose contact of negative electrode seal wire, and the defective of light sensation phenomenon very easily takes place, and is embodied in:
(1) seal wire both sides metallic film is prone to leaked the high-frequency electric field puncture of device and cause metallic film to separate with seal wire by the spark building;
(2) during product inspection, the negative electrode seal wire of part counter tube and metallic film loose contact or obstructed;
When (3) in deairing step, carrying out reverse glow discharge, cause the negative electrode seal wire to separate, negative electrode and anode " point discharge " at this moment can occur with metallic film;
(4) in throwing the radioactive source irradiation is arranged, be in the counter tube under the normal operating conditions, the counting that is had in the unit interval is claimed background counting rate; At this moment; If use the radiation of visible light counter tube, counting rate will increase sharply even take place the continuous discharge counting, and this phenomenon is claimed the light sensation phenomenon.The Geiger counter tube of glass shell all has the light sensation phenomenon, and it is particularly serious as the counter tube of negative electrode especially to spray transparent metal film.
The utility model content
Technical problem:The utility model technical problem to be solved is: a kind of counter tube is provided, improves
The job stability of counter tube product prolongs useful life of counter tube, reduces even avoids taking place the light sensation phenomenon.
Technical scheme:For solving the problems of the technologies described above, the technical scheme that this patent adopts is:
A kind of counter tube comprises negative electrode, anode, cathode wire and the body of being processed by glass, and this body is cylindric; And body inside is cavity, and gassy in the cavity, anode are wire guides; This wire guide penetrates body from the outside of body one end, and extends to the inboard of the body other end; Described negative electrode is the sheet metal that is the shape that curls, and this sheet metal is covered on the wall of body cavity, and the mouth that crosses of sheet metal is overlapped; Described sheet metal is processed by the metal that does not have the effect of radiation-screening thing, and an end of described cathode wire is fixedly connected with sheet metal, and the other end of cathode wire is positioned at the body outside.
Further, described cathode wire and sheet metal are welded to connect.
Beneficial effect:Compared with prior art, the present technique scheme has following beneficial effect:
(1) conductivity is superior, improves the sensitivity of counter tube.In the prior art, negative electrode adopts and to spray into the stannous chloride steam, forms the layer of transparent metallic film, with this as negative electrode.And in the present technique scheme, negative electrode adopts electric conductivity good metal sheet.For the employed material of spraying coating process, the cathode material of present technique scheme has certain advantage, and conductivity is superior, helps improving the sensitivity of counter tube.The present the thinnest 0.05mm that accomplishes of sheet metal technology, so cathode thickness can meet the demands fully.
(2) metallic coil has lighttight characteristic, and counter tube can not influenced by the light sensation phenomenon.In the prior art, sprayed cathode all is a printing opacity, greatly the useful life that influences counter tube of degree.And in the present technique scheme, negative electrode adopts lighttight metal material to process, and can effectively block 80% light transmission part, overcomes this shortcoming greatly, improves the job stability of counter tube product.
(3) negative electrode is firm, prolongs the useful life of counter tube.In the prior art, cause problem such as come off between negative electrode and seal wire because of post-production and use problem.And in the present technique scheme, cathode wire connects the reliable solder technology of employing, and the processing in later stage and use can not impact its fastness, thereby negative electrode is firm, helps prolonging the useful life of counter tube.
Description of drawings
Fig. 1 is the structure cutaway view of this patent.
Fig. 2 is the A-A cutaway view among Fig. 1.
Fig. 3 is the cutaway view of the sheet metal in this patent.
Have among the figure: negative electrode 1, anode 2, cathode wire 3, body 4.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme of this patent is carried out detailed explanation.
To shown in Figure 3, a kind of counter tube of the utility model comprises negative electrode 1, anode 2, cathode wire 3 and the body of being processed by glass 4 like Fig. 1.Body 4 is cylindric, and body 4 inside are cavity.Gassy in the cavity.Whole body 4 is sealing state.Anode 2 is wire guides.This wire guide penetrates body 4 from the outside of body 4 one ends, and extends to the inboard of body 4 other ends.Wire guide discord negative electrode 1 contacts.Seal is adopted in the junction of anode 2 and body 4.Like this, a wire guide part is positioned at body 4 inboards, and a part is positioned at body 4 outsides.Negative electrode 1 is the sheet metal that is the shape that curls.This sheet metal is covered on the wall of body 4 cavitys, and the mouth that crosses of sheet metal is overlapped.The mouth that crosses of sheet metal is overlapped, has all pasted sheet metal on the wall of whole like this body 4 cavitys, reduces even avoid the generation of light sensation phenomenon.Sheet metal is processed by the metal that does not have the effect of radiation-screening thing.For example, sheet metal is by copper, iron, and perhaps stainless steel is processed.One end of cathode wire 3 is fixedly connected with sheet metal, and the other end of cathode wire 3 is positioned at body 4 outsides.Seal is adopted in the junction of cathode wire 3 and body 4.The connected mode of cathode wire 3 and sheet metal is various, and preferred weld connects.Anode 2 is positioned on the axis of body 4, and promptly anode 2 is positioned at the center of negative electrode 1.
When making this counter tube, the first step is carried out shell blowing, selects not the glass material of the working gas reaction in the cavity with body 4, is blow molded into the shape of the desired size of technology; Second step, carry out clean, metal annealing in hydrogen atmosphere and metal pre-oxidation treatment, sheet metal is carried out oxidation with the part that is connected with glass, form oxide-film; In the 3rd step, carry out cathode weld and anode bead sintering; The 4th step, negative electrode is packed in the body, and the fixedly body of anode of packing into, this section sintering is sealed; The 5th step, carry out pump-down process, carry out exhaust in the body with exhaust equipment, also must body be heated to about 300 degree in the exhaust process, vacuum degree must reach 10
-2Pa; In the 6th step, with working gas body is carried out gas washing, all the other foreign gases in the drain; In the 7th step,, stablize after 30 ~ 60 minutes to cut off and get final product from anode bead position at 200 degree environment retrofilling working gas to 1000 ~ 2000pa.
The counter tube of this structure because adopt the sheet metal that is the shape that curls as negative electrode 1, makes that the conductivity of negative electrode 1 is superior, improve the sensitivity of counter tube, and counter tube can not influenced operate as normal by the light sensation phenomenon.
The core of the utility model protection be to be provided be the shape that curls sheet metal as negative electrode 1, to improve the conductivity of negative electrode 1, prolong the useful life of counter tube, reduce even avoid taking place the light sensation phenomenon.The non-creativeness that those skilled in the art does this technical scheme improves, and all belongs to the protection range of this patent.
Claims (3)
1. a counter tube comprises negative electrode (1), anode (2), cathode wire (3) and the body of being processed by glass (4), and this body (4) is cylindric; And body (4) inside is cavity, gassy in the cavity, and anode (2) is a wire guide; This wire guide penetrates body (4) from the outside of body (4) one ends, and extends to the inboard of body (4) other end; It is characterized in that; Described negative electrode (1) is the sheet metal that is the shape that curls, and this sheet metal is covered on the wall of body (4) cavity, and the mouth that crosses of sheet metal is overlapped; Described sheet metal is processed by the metal that does not have the effect of radiation-screening thing, and an end of described cathode wire (3) is fixedly connected with sheet metal, and the other end of cathode wire (3) is positioned at body (4) outside.
2. according to the described tubulose counter tube of claim 1, it is characterized in that described sheet metal is by copper, iron, perhaps stainless steel is processed.
3. according to claim 1 or 2 described tubulose counter tubes, it is characterized in that described cathode wire (3) and sheet metal are welded to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203715370U CN202259157U (en) | 2011-09-28 | 2011-09-28 | Counting tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203715370U CN202259157U (en) | 2011-09-28 | 2011-09-28 | Counting tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202259157U true CN202259157U (en) | 2012-05-30 |
Family
ID=46120357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203715370U Expired - Lifetime CN202259157U (en) | 2011-09-28 | 2011-09-28 | Counting tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202259157U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115327606A (en) * | 2022-08-08 | 2022-11-11 | 上海核工程研究设计院有限公司 | Working gas circulating type source range neutron detector |
-
2011
- 2011-09-28 CN CN2011203715370U patent/CN202259157U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115327606A (en) * | 2022-08-08 | 2022-11-11 | 上海核工程研究设计院有限公司 | Working gas circulating type source range neutron detector |
| CN115327606B (en) * | 2022-08-08 | 2024-05-10 | 上海核工程研究设计院股份有限公司 | Working gas circulating source range neutron detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180418 Address after: Jiaxing City, Zhejiang province 314199 Jiashan county Luo Xing Street No. 1 Wu Lu 18 Valley to building four floor Patentee after: Zhejiang Tong Meng Communication Technology Co., Ltd. Address before: No. 429, paving street, Jiangning District, Nanjing, Jiangsu Patentee before: Nanjing Tech-Ok Science and Technology Development Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |
|
| CX01 | Expiry of patent term |