阅读说明：本技术 一种玻璃管探测器 (Glass tube detector ) 是由 白雪松 付利平 贾楠 付建国 王天放 李睿智 肖思 彭如意 皮彦婷 江芳 于 2021-08-06 设计创作，主要内容包括：本发明涉及光电传感器探测领域,具体涉及一种玻璃管探测器,所述探测器包括探测组件、管套组件、光阑组件和外壳组件。所述管套组件包括管套、第一管套端盖、第二管套端盖、第三管套端盖；所述外壳组件包括外壳、第一外端盖、第二外端盖和第三外端盖；所述探测器组件和管套的内部之间充满第一胶层；所述外壳和管套之间的内部空间充满第二胶层；所述外壳上线缆的接口处充满第三胶块；所述玻璃管探测器还包括有第一辅助块和第二辅助块、第一辅助顶盖和第二辅助顶盖。本发明结构尺寸小、安装方便、在保证安装精度同时大幅度提高探测器的抗振、抗冲击性能,增强了小型玻璃管探测器对力学环境的适应性,拓展了探测器的使用场景。(The invention relates to the field of photoelectric sensor detection, in particular to a glass tube detector which comprises a detection assembly, a tube sleeve assembly, a diaphragm assembly and a shell assembly. The pipe sleeve assembly comprises a pipe sleeve, a first pipe sleeve end cover, a second pipe sleeve end cover and a third pipe sleeve end cover; the housing assembly comprises a housing, a first outer end cover, a second outer end cover and a third outer end cover; a first glue layer is filled between the detector assembly and the inner part of the pipe sleeve; the inner space between the shell and the pipe sleeve is filled with a second glue layer; the interface of the cable on the shell is filled with a third rubber block; the glass tube detector also comprises a first auxiliary block, a second auxiliary block, a first auxiliary top cover and a second auxiliary top cover. The invention has small structure size and convenient installation, greatly improves the vibration resistance and the shock resistance of the detector while ensuring the installation precision, enhances the adaptability of the small glass tube detector to the mechanical environment and expands the use scene of the detector.)

1. A glass tube detector comprises a detector assembly, a tube sleeve assembly, a diaphragm assembly and a shell assembly, wherein the tube sleeve assembly comprises a tube sleeve, a first tube sleeve end cover, a second tube sleeve end cover and a third tube sleeve end cover; the housing assembly comprises a housing, a first outer end cap, a second outer end cap and a third outer end cap, and is characterized in that,

a first glue layer is filled between the detector assembly and the inner part of the pipe sleeve;

the inner space between the shell and the pipe sleeve is filled with a second glue layer;

the interface of the cable on the shell is filled with a third rubber block;

the glass tube detector also comprises a first auxiliary block, a second auxiliary block, a first auxiliary top cover and a second auxiliary top cover; the first auxiliary block and the second auxiliary block are fastened on the opposite sides of the pipe sleeve through a first auxiliary top cover and a second auxiliary top cover which are fixed on the shell respectively.

2. The glass tube probe of claim 1, wherein the probe assembly is coupled to a first shroud end cap and a second shroud end cap; the detector assembly comprises a photomultiplier and a photomultiplier seat, and the first glue layer is used for encapsulating and fixing the detector assembly from the pipe sleeve window.

3. The glass tube detector as claimed in claim 1, wherein the pipe sleeve is provided with a limiting groove on the upper and lower surfaces thereof for engaging the first auxiliary block and the second auxiliary block.

4. The glass tube detector as claimed in claim 1, wherein the housing is provided with stepped holes on upper and lower surfaces thereof for fitting the T-shaped first and second auxiliary top caps.

5. The glass tube detector as claimed in claim 1 or 4, wherein the housing is provided with limiting through holes at two sides of the first auxiliary top cover and the second auxiliary top cover; and limiting threaded holes are reserved on the upper surface and the lower surface of the pipe sleeve respectively, and the limiting screws respectively penetrate through the limiting through holes of the shell and are screwed into the limiting threaded holes reserved in the pipe sleeve.

6. The glass tube detector as claimed in claim 4, wherein the first auxiliary top cover and the first auxiliary block are fastened by screws, and the second auxiliary top cover and the second auxiliary block are fastened by screws.

7. The glass tube detector as claimed in claim 5, wherein the length of the limit screw is smaller than the distance from the bottom end of the limit threaded hole to the surface of the shell; the length of the limiting screw is greater than the distance from the top end of the limiting threaded hole to the surface of the shell.

8. The glass tube detector as claimed in claim 1, wherein a third rubber block is filled between the second outer end cap and the cable, between the wire clip and the cable, and between the wire clip and the second outer end cap.

9. The glass tube detector as claimed in claim 1, wherein the diaphragm assembly is mounted to the tube housing window, the diaphragm assembly including a diaphragm, a filter, a spacer ring and a pressing ring; the optical filter, the spacing ring and the pressing ring are sequentially arranged in the circular groove of the diaphragm light inlet, and the second adhesive layer is fixed in a secondary encapsulating mode from the shell window.

Technical Field

The invention relates to the field of photoelectric detection, in particular to a glass tube detector.

Background

The glass tube detector is a weak light detector commonly used in the field of optical detection, and is formed by packaging a photocathode, a deposition material, a photocathode, an electron multiplier, insulating ceramic and a glass tube, wherein the photocathode and the photocathode are both in a grid wire structure, and the materials, the structures and the packaging process of the components have poor vibration resistance and impact resistance, so that the detector is easily damaged in vibration and impact environments, and the use environment and the occasion of the detector are limited. In the field of aerospace in recent years, the requirement of a space-based instrument for low-light observation is continuously expanded, and higher requirements are put on the satellite-borne and rocket-borne environmental adaptability of the detector, so that reasonable vibration isolation measures are required to be adopted to enhance the vibration resistance and the shock resistance of the detector.

In the prior art, many solutions have been proposed, for example, patent document CN106229249A discloses a vibration damping device for mounting a photomultiplier tube, which uses a die to form a vibration damping interlayer with a specific structure, and uses screws and pressing sheets to compress and fix an inner sleeve and the vibration damping interlayer, so as to realize flexible connection between the inner sleeve and a housing, but the mounting position of the inner sleeve can be changed while compressing and fixing, and too low dimensional accuracy of the vibration damping interlayer can reduce vibration isolation performance and mounting accuracy, so that the requirement on die processing is higher for ensuring the dimensional accuracy of the vibration damping interlayer, and in this case, no vibration isolation measure is taken for the lead-out cable of the photomultiplier tube.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a glass tube detector which has the advantages of small structural size, convenience in installation, strong vibration resistance and higher installation precision, greatly improves the vibration resistance and the impact resistance of the detector while ensuring the installation precision, enhances the mechanical environment adaptability of the small glass tube detector and expands the use scene of the detector.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the invention provides a glass tube detector which comprises a detector component, a pipe sleeve component, a diaphragm component, a shell component and an auxiliary component. The detector assembly includes a photomultiplier tube and a photomultiplier tube mount.

The pipe sleeve assembly comprises a pipe sleeve, a first pipe sleeve end cover, a second pipe sleeve end cover, a third pipe sleeve end cover and a first glue layer.

The diaphragm assembly comprises a diaphragm, an optical filter, a space ring and a pressing ring.

The shell component comprises a shell, a first outer end cover, a second outer end cover, a third outer end cover, a second glue layer, a wire clamp, a third glue block, a first auxiliary top cover and a second auxiliary top cover.

The auxiliary assembly comprises a PCB, a limiting screw, a first auxiliary block and a second auxiliary block.

A first glue layer is filled between the detector assembly and the inner part of the pipe sleeve; the first adhesive layer encapsulates and fixes the detector assembly from the pipe sleeve window;

the inner space between the shell and the pipe sleeve is filled with a second glue layer;

the interface of the cable on the shell is filled with a third rubber block;

the glass tube detector also comprises a first auxiliary block, a second auxiliary block, a first auxiliary top cover and a second auxiliary top cover; the first auxiliary block and the second auxiliary block are fastened on the opposite sides of the pipe sleeve through a first auxiliary top cover and a second auxiliary top cover which are fixed on the shell respectively.

The detection assembly is fixed in the pipe sleeve, the diaphragm assembly is fixed on the pipe sleeve, the pipe sleeve assembly is fixed in the shell assembly, and the auxiliary assembly assists the detector to achieve a specific function.

Preferably, the probe assembly is connected to the first and second shroud end caps; the first pipe sleeve end cover, the second pipe sleeve end cover and the third pipe sleeve end cover fix the detector assembly in the pipe sleeve; the detection surface of the photomultiplier is parallel to the pipe sleeve window; the sleeve window is encapsulated with QD-231 vulcanized silicone rubber, so that a first glue layer is filled between the probe assembly and the inner cavity of the sleeve.

Preferably, step holes are formed in the upper surface and the lower surface of the shell and used for being matched with the T-shaped first auxiliary top cover and the T-shaped second auxiliary top cover.

Preferably, the optical filter, the spacing ring and the pressing ring are sequentially arranged in a circular groove of the diaphragm light inlet; the diaphragm assembly consisting of the diaphragm, the optical filter, the spacing ring and the pressing ring is arranged on the pipe sleeve window; the diaphragm assembly suppresses stray light and selects a working waveband.

Preferably, the upper surface and the lower surface of the pipe sleeve are provided with limit grooves; the upper surface and the lower surface of the pipe sleeve are correspondingly provided with limiting grooves for embedding the first auxiliary block and the second auxiliary block, and the length and width dimensional tolerances of the limiting grooves are all positive tolerances of 0.1mm-0.2 mm; the first auxiliary block and the second auxiliary block penetrate through the upper auxiliary window and the lower auxiliary window of the shell respectively, and the auxiliary blocks are embedded into the upper limiting groove and the lower limiting groove in the radial direction of the pipe sleeve;

preferably, limiting through holes are formed in the shell and positioned on two sides of the first auxiliary top cover and the second auxiliary top cover; limiting threaded holes are respectively reserved on the upper surface and the lower surface corresponding to the pipe sleeve; the limiting screws respectively penetrate through the limiting through holes of the shell and are screwed into the limiting threaded holes reserved in the pipe sleeve. The first auxiliary top cover and the first auxiliary block are fastened by using a limit screw, and the second auxiliary top cover and the second auxiliary block are fastened by using a limit screw; the first auxiliary block and the second auxiliary block penetrate into an upper limiting groove face and a lower limiting groove face which are used for embedding one end face of the auxiliary block into the pipe sleeve from an upper auxiliary window and a lower auxiliary window of the shell respectively, and therefore the pipe sleeve assembly is fixed on a first auxiliary top cover and a second auxiliary top cover in an inner cavity of the shell.

The second outer end cover, the second glue layer, the third glue block, the first auxiliary top cover and the second auxiliary top cover.

Preferably, the upper surface and the lower surface of the shell are provided with limiting through holes; the limiting screws respectively penetrate through the limiting through holes of the shell and are screwed into the limiting threaded holes reserved in the pipe sleeve until the plane of the nut is superposed with the surface of the shell; and the first auxiliary top cover and the second auxiliary top cover are respectively unscrewed from the shell, and after the auxiliary pressing block I and the auxiliary pressing block II are taken off, the first auxiliary top cover and the second auxiliary top cover are respectively fixed on the shell.

Preferably, the length of the limiting screw is smaller than the distance from the bottom end of the limiting threaded hole to the surface of the shell; the length of the limiting screw is greater than the distance from the top end of the limiting threaded hole to the surface of the shell.

Preferably, the first outer end cover, the second outer end cover and the third outer end cover are respectively fixed on the shell; and a cable of the detector assembly is led out from the round hole of the second outer end cover and penetrates through the wire clip to be connected into the PCB.

Preferably, GD-414 glue is filled between the second outer end cover and the cable, between the wire clip and the cable, and between the wire clip and the second outer end cover to form a third glue block. And the QD-231 vulcanized silicone rubber is encapsulated in the shell window for the second time, so that a second adhesive layer is filled between the pipe sleeve assembly and the inner cavity of the shell.

Preferably, the 8 limit screws are taken out after the second glue layer is cured for a period of time.

Preferably, the metal structural member is made of magnesium-aluminum alloy with good damping property.

Preferably, the QD-231 glue and the GD-414 glue are both adhesives capable of being cured at normal temperature.

Compared with the prior art, the invention has the advantages that:

the invention solves the problem of limited use environment caused by poor vibration resistance and impact resistance of a small glass tube detector packaging material and process, effectively attenuates vibration and impact amplitude on a mechanical transmission path from a shell mounting pin to a detector assembly by utilizing a first adhesive layer and a second adhesive layer, isolates a cable led out of the detector assembly from a shell by utilizing a third adhesive block, avoids the direct contact of the led-out cable and the shell, reduces the vibration and impact amplitude transmitted from the shell to the detector cable, improves the working stability of the detector, avoids the detector assembly from being damaged by stress or losing function through pouring adhesive for many times, and increases the adaptability of the detector to the mechanical environment.

When the secondary glue filling is carried out, the limit functions of the auxiliary top cover and the auxiliary pressing block are utilized, the anti-vibration and anti-impact performance of the detector is enhanced, meanwhile, the installation precision of the detector is guaranteed, after the limit of 8 screws is carried out, the auxiliary pressing block is detached and the second glue layer is encapsulated, the limit screws can be detached from the outer side after the second glue layer is cured, so that the pipe sleeve is in complete flexible contact with the inner cavity of the shell, and the cured second glue layer also has certain supporting rigidity to guarantee the installation precision of the detector assembly.

Drawings

FIG. 1 is an exploded view of a glass tube probe according to the present invention;

FIG. 2 is a schematic view of a probe assembly of the present invention;

FIG. 3 is a schematic view of a diaphragm assembly of the present invention;

FIG. 4(a) is a schematic view of a pipe sleeve according to the present invention; FIG. 4(b) is a schematic side view of a pipe sleeve according to the present invention;

FIG. 5 is a schematic view of a shroud assembly of the present invention;

FIG. 6(a) is a schematic view of the housing of the present invention; FIG. 6(b) is a side view of the housing of the present invention;

FIG. 7 is a cross-sectional view of a stop screw support sleeve according to the present invention;

FIG. 8 is a cross-sectional view of a glass tube probe in accordance with the present invention;

reference numerals:

1. a first outer end cover, 2, a wire clip, 3, a third rubber block, 4, a photomultiplier seat, 5, a second auxiliary top cover, 6, a PCB board, 7, a shell, 8, a diaphragm component, 9, a pipe sleeve, 10, a third outer end cover, 11, a third pipe sleeve end cover, 12, a first rubber layer, 13, a second rubber layer, 14, a first auxiliary top cover, 15, a photomultiplier, 16, a second pipe sleeve end cover, 17, a first pipe sleeve end cover, 18, the photoelectric detection device comprises a second outer end cover, 19, a first auxiliary block, 20, a second auxiliary block, 21, a limiting screw, 81, a diaphragm, 82, an optical filter, 83, a space ring, 84, a pressing ring, 401, a photomultiplier tube seat mounting pin, 402, a cable, 403, a detection circular surface, 701, a shell window, 702, an auxiliary window, 703, a limiting through hole, 704, a mounting surface, 901, a tube sleeve window, 902, a tube sleeve limiting groove, 903 and a tube sleeve limiting threaded hole.

Detailed Description

The present invention will be further described with reference to the following specific examples.

The invention is further described with reference to the following figures and specific examples.

As shown in fig. 1, a glass tube probe includes: the detector assembly (photomultiplier tube seat 4 and photomultiplier tube 15), the tube sleeve assembly (tube sleeve 9, third tube sleeve end cover 11, first glue layer 12, second tube sleeve end cover 16 and first tube sleeve end cover 17), the diaphragm assembly 8 (diaphragm 81, optical filter 82, spacer ring 83, clamping ring 84), the housing assembly (first outer end cover 1, wire clamp 2, third glue block 3, second auxiliary top cover 5, housing 7, third outer end cover 10, second glue layer 13, first auxiliary top cover 14 and second outer end cover 18) and other components (PCB 6, first auxiliary block 19, second auxiliary block 20 and limit screw 21).

As shown in fig. 2, the photomultiplier tube 4 is connected to the photomultiplier tube holder 15 via pins, and the detector assembly is connected to the first tube holder end cap 17 and the second tube holder end cap 16 via the photomultiplier tube holder mounting pins 401 by screws, so as to complete initial fixing of the detector assembly.

The initially fixed detector assembly is inserted into the inner cavity of the pipe sleeve 9, so that the detection circular surface 403 of the photomultiplier tube 4 is parallel to the pipe sleeve window 901; as shown in fig. 4(a), 4(b), the first, second and third shroud end caps 17, 16, 11 are secured to shroud 9 such that the shroud assembly retains the only opening, shroud window 901; the QD-231 vulcanized silicone rubber is filled in the pipe sleeve window 901, the first adhesive layer 12 is filled between the detector assembly and the inner cavity of the pipe sleeve, the detector assembly is adhered and fixed by utilizing the adhesive property of the QD-231, the cured QD-231 has certain supporting rigidity and supports and positions the detector assembly, the supporting effect on the detector assembly is enhanced, the cured adhesive realizes the flexible connection between the detector assembly and the pipe sleeve, the vibration or impact input from the pipe sleeve to the detector assembly is effectively reduced by utilizing the damping property of the cured adhesive, the sensitivity of the detector assembly to the vibration and the impact is reduced, and the reliability and the stability of the operation of the detector assembly are improved.

As shown in fig. 3 and 5, the optical filter 82, the spacer ring 83 and the pressing ring 84 are sequentially installed in the circular groove of the light inlet of the diaphragm 81 to form a diaphragm assembly 8, and the diaphragm assembly 8 is installed in the pipe sleeve window 901; the aperture 81 is opened with a small rectangular window at the light inlet to suppress stray light, and the filter 82 is replaced to select a working band, in this embodiment, the filter is a magnesium fluoride crystal and cuts off ultraviolet light below 130 nm.

The upper surface and the lower surface of the pipe sleeve 9 are provided with limiting grooves 902, and the upper surface and the lower surface are provided with limiting threaded holes 901; the first auxiliary top cover 14 and the first auxiliary block 19 are fastened by a limit screw 21, and the second auxiliary top cover 5 and the second auxiliary block 20 are fastened by the limit screw 21; the length and width dimensions of the limiting groove 901 are both positive tolerance 0.1mm-0.2mm, and the length and width dimensions of the first auxiliary block and the second auxiliary block are both negative tolerance 0.1mm-0.2 mm; as shown in fig. 6(a) and 6(b), the first auxiliary block 19 and the second auxiliary block 20 respectively penetrate through the upper and lower auxiliary windows 702 of the housing 7, and the end faces of the auxiliary blocks are inserted into the upper and lower limiting groove faces 902 of the pipe sleeve 9, so that the pipe sleeve assembly is fixed in the housing, and the optical filter 82 is coaxial with the housing window 701; the first auxiliary top cover 14 and the second auxiliary top cover 19 are respectively fixed on the upper surface and the lower surface of the shell 7, and the initial positioning of the pipe sleeve assembly is completed.

The upper surface and the lower surface of the shell 7 are provided with limiting through holes 703; the 8 limiting screws 21 respectively penetrate through the limiting through holes 703 and are screwed into limiting threaded holes 903 reserved in the pipe sleeve, the limiting threaded holes 903 are all blind holes, and the screws are screwed until the plane of the screw cap is overlapped with the surface of the shell; the length of the limiting screw 21 is smaller than the distance from the bottom end of the limiting threaded hole 903 to the surface of the shell; the length of the limiting screw 21 is greater than the distance from the top end of the limiting threaded hole 903 to the surface of the shell; the first auxiliary top cover 14 and the second auxiliary top cover 5 are respectively unscrewed from the shell, and after the first auxiliary block 19 and the second auxiliary block 20 are removed, the first auxiliary block and the second auxiliary block are respectively fixed on the shell 7; through the operation, the conversion from the limiting of the internal pressing block to the limiting of the external screw is completed, the installation precision of the pipe sleeve assembly is ensured, and the subsequent screw disassembling operation is also facilitated.

As shown in fig. 7-8, the first outer end cap 1, the second outer end cap 18 and the third outer end cap 10 are respectively fixed to the housing 7; the cable of the detector assembly is led out from the circular hole of the second outer end cover 18 and penetrates through the wire clip to be connected into the PCB 6, so that the photoelectric conversion function is realized; GD-414 glue is filled between the second outer end cover 18 and the cable 402, between the wire clip 2 and the cable 402, and between the wire clip 2 and the second outer end cover 18, a third glue block 3 is formed after the glue blocks are solidified, the third glue block 3 has a supporting effect on the cable, the third glue block 3 completely isolates the cable 402 from a metal structural member, the cable 402 is prevented from being led out to be in direct contact with the structural member, vibration and impact amplitude transmitted to the cable 402 from the structural member are reduced by using the damping characteristic of the glue blocks, and the reliability of the detector assembly is improved.

The third rubber block 3 is filled in a gap between the circular hole of the second outer end cover 18 and the cable 402, so that the shell assembly is provided with an only opened shell window 701, QD-231 vulcanized silicone rubber is encapsulated from the shell window 701 for the second time, so that a second rubber layer 13 is filled between the pipe sleeve assembly and the inner cavity of the shell, the second rubber layer 13 is used for gluing and fixing the pipe sleeve assembly, after the second rubber layer 13 is cured, a limiting screw 21 can be detached from the outer side, so that the pipe sleeve assembly is in complete flexible contact with the shell, vibration and impact transmitted to the pipe sleeve assembly from the shell are greatly attenuated, and the cured second rubber layer 13 also has certain supporting rigidity to ensure the mounting accuracy of the detector assembly; the working stability of the detector assembly is improved.

The PCB 6 is fixed on the PCB mounting surface 704 to complete the mounting of the detector.

The glass tube detector is made of metal, the materials are magnesium-aluminum alloy with good damping property, QD-231 and GD-414 glue are adhesives capable of being cured at normal temperature, the glass tube detector is high in overall supporting strength, good in damping property and compact in structure, can be stably used in severe impact and vibration environments, and meets the requirement of high-reliability vibration reduction.

Conventional technical knowledge in the art can be used for the details which are not described in the present invention.

The particular features, structures, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.