CN203463099U - Natural gamma combined damping structure - Google Patents
Natural gamma combined damping structure Download PDFInfo
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- CN203463099U CN203463099U CN201320487491.8U CN201320487491U CN203463099U CN 203463099 U CN203463099 U CN 203463099U CN 201320487491 U CN201320487491 U CN 201320487491U CN 203463099 U CN203463099 U CN 203463099U
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- pillar
- photomultiplier
- natural gamma
- sodium iodide
- shock absorption
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Abstract
The utility model provides a natural gamma combined damping structure, and relates to oil drilling measuring equipment. The natural gamma combined damping structure comprises a sodium iodide crystal and a photomultiplier, the upper end of the sodium iodide crystal is in contact with the lower end of the photomultiplier, the sodium iodide crystal is positioned in a metal shell, the upper end of the metal shell is an opening while the lower end of the same is provided with a bottom plate, a lower protective tube and an upper protective tube are arranged on outer sides of the metal shell and the photomultiplier respectively, the upper protective tube is divided into a protective tube body and a connecting portion, the inner diameter of the protective tube body is smaller than that of the connecting portion, the connecting portion of the upper protective tube is connected with the upper end of the lower protective tube in a threaded manner, and the upper end of the metal shell is in contact with the lower end of the protective tube body. The natural gamma combined damping structure is capable of preventing the photomultiplier and the sodium iodide crystal from easily cracking.
Description
Technical field
The utility model relates to oil drilling measurement mechanism, is specifically related to a kind of natural gamma combined shock absorption structure.
Background technology
Natural gamma probe is used for the gamma ray that incides probe to be converted to electric impulse signal.Probe is comprised of scintillation crystal and photomultiplier, and conventional scintillation crystal is sodium iodide crystal.Gamma ray in stratum enters after sodium iodide crystal, and part or all of ray energy converts luminous energy to, and photon is coupled on the photocathode of photomultiplier by the window side of crystal, and the photon that energy is larger can produce photoelectron on photocathode.Each electrode of photomultiplier is assigned to suitable voltage by divider resistance, and photoelectron is attracted by every one-level electrode successively and produces more secondary electron, and the electric current that these electronics arrive anodic formation is received by circuit, generates Natural Gamma-ray Logging Curves.Further, because Different Strata gamma ray intensity is different, Natural Gamma-ray Logging Curves can be used to divide Different Strata.
Photomultiplier in gamma detector and sodium iodide crystal all belong to breakables, and photomultiplier or the cracked phenomenon of crystal often occur when complex instrument vibrations in well ore deposit are larger, have a strong impact on normal logging operation.
Utility model content
In order to solve photomultiplier and the easy cracked technical problem of sodium iodide crystal in prior art, the utility model provides a kind of natural gamma combined shock absorption structure.
Technical solution of the present utility model is:
A kind of natural gamma combined shock absorption structure, its special character is: comprise sodium iodide crystal and photomultiplier, the upper end of sodium iodide crystal contacts with the lower end of photomultiplier, sodium iodide crystal is positioned at a metal shell, the upper end of this metal shell is opening, lower end is provided with base plate, the outside of metal shell and photomultiplier is respectively arranged with lower pillar and upper pillar, upper pillar is divided into pillar main body and connecting portion, the internal diameter of pillar main body is less than the internal diameter of connecting portion, the upper end of the connecting portion of upper pillar and lower pillar is threaded connection, the upper end of metal shell contacts with the lower end of pillar main body.
Optimal technical scheme of the present utility model is also to comprise damping part, and the upper end of described photomultiplier is disposed with shading sleeve, base sheath and regulates volution, regulates between volution and base sheath and is provided with this damping part.
The diameter of above-mentioned sodium iodide crystal is less than or equal to the internal diameter of pillar main body, is provided with leaded light film between sodium iodide crystal and photomultiplier, and the diameter of conduit film is less than or equal to the diameter of sodium iodide crystal.
Also comprise plug, between the lower end of described lower pillar and plug, be threaded, between base plate and this plug, be provided with rubber pad, this rubber pad all contacts with base plate and plug, preferably silicone rubber pad.
Between above-mentioned pillar main body and photomultiplier and/or between lower pillar and metal shell, be provided with described damping part.
The inner surface of above-mentioned pillar main body and/or the inner surface of lower pillar, be provided with one or more annular grooves, in each annular groove, be provided with described damping part.
Between above-mentioned adjusting volution and base sheath, be provided with one or more annular grooves, each annular groove is provided with described damping part.
Above-mentioned damping part is rubber ring, preferably silicon rubber loop.
The utility model has the advantages that:
1, structure of the present utility model, makes the vibrations of sodium iodide crystal can not produce destruction to photomultiplier;
2, the utility model has radially damping and axial damping, therefore can cushion the external force that comes from all directions;
3, regulate volution to regulating the tightness of the damping part between volution and base sheath to regulate when assembling, to make damping effect better;
4, the leaded light film between photomultiplier and sodium iodide crystal, had both played optically-coupled effect and had also played cushioning effect;
5, structure of the present utility model can be protected sodium iodide crystal and photomultiplier effectively, reduces the probability that natural gamma probe damages, and improves logging efficiency, lowering apparatus maintenance cost.
Accompanying drawing explanation
Fig. 1 is natural gamma combined shock absorption structural representation provided by the utility model;
Fig. 2 is the axial section of pillar on the utility model.
Reference numeral:
1-silicone rubber pad; 2-sodium iodide crystal; Pillar under 3-; 4-leaded light film; 5-photomultiplier; The upper pillar of 6-; 7-damping part; 8-shading sleeve; 9-base sheath; 10-pillar main body; 11-regulates volution; 12-metal shell; 13-plug; 14-connecting portion.
The specific embodiment
As shown in Figure 1, the utility model provides a kind of natural gamma combined shock absorption structure, comprise sodium iodide crystal 2 and photomultiplier 5, the upper end of sodium iodide crystal contacts with the lower end of photomultiplier, sodium iodide crystal is positioned at a metal shell 12, the lower end of this metal shell is provided with base plate, the outside of metal shell and photomultiplier is respectively arranged with lower pillar 3 and upper pillar 6, upper pillar is divided into pillar main body 10 and connecting portion 14, and the upper end of the connecting portion of upper pillar and lower pillar is threaded connection.This is threaded and can realizes in the following way: the external surface of lower pillar upper end is provided with external screw thread, and the inner surface of connecting portion is provided with the internal thread matching with this external screw thread.Wherein, the internal diameter of pillar main body is less than the internal diameter of connecting portion, and the diameter of sodium iodide crystal is less than or equal to the internal diameter of pillar main body, and the upper end of metal shell contacts with the lower end of pillar main body.
When using the utility model work, vibrations are sometimes larger, therefore; by the lower end close contact of the upper end of metal shell and pillar main body; upper pillar can cushion the power that a part of sodium iodide crystal produces because of vibrations, has therefore effectively protected photomultiplier, prevents that photomultiplier is cracked.
In order better to protect photomultiplier, between the pillar main body of upper pillar and photomultiplier, be provided with damping part 7, specifically can one or more annular grooves be set at the pillar body inner surface of upper pillar, in each annular groove, damping part be set; Equally; in order better to protect sodium iodide crystal; can also between lower pillar and metal shell, damping part be set by the same way, specifically one or more annular grooves can be set at the inner surface of lower pillar, in each annular groove, be provided with damping part.The utility model also comprises plug 13; between the lower end of lower pillar and plug, be threaded; in order better to protect sodium iodide crystal; between metal shell base plate and plug, be provided with rubber pad; rubber pad all contacts with base plate and plug, in order to make damping effect better, rubber pad can also be replaced with to silicone rubber pad 1; also between sodium iodide crystal and photomultiplier, be provided with leaded light film 4, the diameter of conduit film is less than or equal to the diameter of sodium iodide crystal.Leaded light film had both played optically-coupled effect and had also played damping, buffering effect, and when using the utility model work, the optically-coupled effect of leaded light film, can guarantee the transmission of light from sodium iodide crystal to photomultiplier.
The upper end of the utility model photomultiplier is provided with shading sleeve 8, the upper end of shading sleeve is provided with base sheath 9, the upper end of base sheath is provided with and regulates volution 11, in vibration environment in real work, because vibrations may cause cracked to sodium iodide crystal and photomultiplier from any one direction, therefore between adjusting volution and base sheath, be provided with damping part, specifically arranging of this damping part is as follows: between adjusting volution and base sheath, be provided with one or more annular grooves, each annular groove is provided with damping part.
Damping part of the present utility model can adopt rubber ring, specifically can adopt silicon rubber loop.
The pillar main body of upper pillar and the damping part between photomultiplier, lower pillar and the damping part between metal shell all mainly play cushioning effect diametrically; Be arranged on the rubber pad of sodium iodide crystal lower end or the damping part of leading between film and adjusting volution and base sheath between silicone rubber pad, sodium iodide crystal and photomultiplier and all mainly play in the axial direction cushioning effect.
The pillar main body of upper pillar and the damping part between photomultiplier, lower pillar and the damping part between metal shell, be arranged on rubber pad or the silicone rubber pad of sodium iodide crystal lower end, between sodium iodide crystal and photomultiplier, lead film, and the damping part between adjusting volution and base sheath, in vibration environment in real work, five all can cushion the power that a part produces because of vibrations, and five synergy, will cushion more power producing because of vibrations, therefore, the utility model can better be protected sodium iodide crystal and photomultiplier.
In order to guarantee effective damping, buffering effect, regulate volution when assembling, to the tightness of the damping part between adjusting volution and base sheath, to regulate.
Claims (10)
1. a natural gamma combined shock absorption structure, it is characterized in that: comprise sodium iodide crystal and photomultiplier, the upper end of sodium iodide crystal contacts with the lower end of photomultiplier, sodium iodide crystal is positioned at a metal shell, the upper end of this metal shell is opening, lower end is provided with base plate, the outside of metal shell and photomultiplier is respectively arranged with lower pillar and upper pillar, upper pillar is divided into pillar main body and connecting portion, the internal diameter of pillar main body is less than the internal diameter of connecting portion, the upper end of the connecting portion of upper pillar and lower pillar is threaded connection, the upper end of metal shell contacts with the lower end of pillar main body.
2. natural gamma combined shock absorption structure according to claim 1, it is characterized in that: also comprise damping part, the upper end of described photomultiplier is disposed with shading sleeve, base sheath and regulates volution, regulates between volution and base sheath and is provided with this damping part.
3. natural gamma combined shock absorption structure according to claim 2, it is characterized in that: the diameter of described sodium iodide crystal is less than or equal to the internal diameter of pillar main body, between sodium iodide crystal and photomultiplier, be provided with leaded light film, the diameter of conduit film is less than or equal to the diameter of sodium iodide crystal.
4. natural gamma combined shock absorption structure according to claim 3, is characterized in that: also comprise plug, between the lower end of described lower pillar and plug, be threaded, between base plate and this plug, be provided with rubber pad, this rubber pad all contacts with base plate and plug.
5. natural gamma combined shock absorption structure according to claim 4, is characterized in that: described rubber pad is silicone rubber pad.
6. natural gamma combined shock absorption structure according to claim 5, is characterized in that: between described pillar main body and photomultiplier and/or between lower pillar and metal shell, be provided with described damping part.
7. natural gamma combined shock absorption structure according to claim 6, is characterized in that: the inner surface of described pillar main body and/or the inner surface of lower pillar, be provided with one or more annular grooves, be provided with described damping part in each annular groove.
8. natural gamma combined shock absorption structure according to claim 7, is characterized in that: between described adjusting volution and base sheath, be provided with one or more annular grooves, each annular groove is provided with described damping part.
9. natural gamma combined shock absorption structure according to claim 8, is characterized in that: described damping part is rubber ring.
10. natural gamma combined shock absorption structure according to claim 9, is characterized in that: described rubber ring is silicon rubber loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320487491.8U CN203463099U (en) | 2013-08-09 | 2013-08-09 | Natural gamma combined damping structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320487491.8U CN203463099U (en) | 2013-08-09 | 2013-08-09 | Natural gamma combined damping structure |
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| Publication Number | Publication Date |
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| CN203463099U true CN203463099U (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320487491.8U Expired - Lifetime CN203463099U (en) | 2013-08-09 | 2013-08-09 | Natural gamma combined damping structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285638A (en) * | 2015-05-14 | 2017-01-04 | 万瑞（北京）科技有限公司 | A kind of logging instrument and well logging end nose thereof |
| CN111766634A (en) * | 2020-06-19 | 2020-10-13 | 中国石油天然气股份有限公司 | Vibration reduction type gamma sensor assembly |
| CN112992645A (en) * | 2021-02-02 | 2021-06-18 | 江苏常宁电子有限公司 | Medical low-noise photomultiplier convenient for crystal replacement |
| CN117145452A (en) * | 2023-07-10 | 2023-12-01 | 中国地质大学（武汉） | Up-down separation type detector protection tube transmission mechanism for deep detection |
-
2013
- 2013-08-09 CN CN201320487491.8U patent/CN203463099U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285638A (en) * | 2015-05-14 | 2017-01-04 | 万瑞（北京）科技有限公司 | A kind of logging instrument and well logging end nose thereof |
| CN111766634A (en) * | 2020-06-19 | 2020-10-13 | 中国石油天然气股份有限公司 | Vibration reduction type gamma sensor assembly |
| CN111766634B (en) * | 2020-06-19 | 2023-01-24 | 中国石油天然气股份有限公司 | Vibration damping type gamma sensor assembly |
| CN112992645A (en) * | 2021-02-02 | 2021-06-18 | 江苏常宁电子有限公司 | Medical low-noise photomultiplier convenient for crystal replacement |
| CN112992645B (en) * | 2021-02-02 | 2023-08-15 | 江苏常宁电子有限公司 | Medical low-noise photomultiplier convenient for crystal replacement |
| CN117145452A (en) * | 2023-07-10 | 2023-12-01 | 中国地质大学（武汉） | Up-down separation type detector protection tube transmission mechanism for deep detection |
| CN117145452B (en) * | 2023-07-10 | 2024-03-26 | 中国地质大学（武汉） | Up-down separation type detector protection tube transmission mechanism for deep detection |
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Granted publication date: 20140305 |