A kind of photomultiplier waterproof frock
Technical field
The utility model is related to photomultiplier applied technical field, more particularly to a kind of photomultiplier waterproof frock.
Background technology
Photomultiplier is a kind of the photoelectron vacuum device that faint optical signal is changed into electric signal and is amplified.Its
It is widely used in Medical Devices, photon counting, the field such as high-energy physics.As a kind of vacuum component, photomultiplier mainly by
Photocathode, acceleration pole, focusing electrode, dynode and anode collector etc. are placed in the vacuum tank of a sealing and constituted.Light
Electric multiplier tube is as a kind of accurate Photoelectric Detection instrument, and the requirement of its working environment is also quite harsh.General,
Photomultiplier is all will could normal work, the circuit board and photomultiplier by the bleeder circuit plate of a supporting outside
Metal pin by directly welding or other modes link together.
For some special application fields, photomultiplier needs to be placed on moist even underwater operation, for this
The situation of kind, exactly requires that we need to provide a kind of water-tight device, can either reach the purpose of waterproof simultaneously and not influence photoelectricity
The normal work of multiplier tube.The humidity of environment, the factor such as temperature can all influence photomultiplier and make with its support circuit plate
With precision and life situations.In the prior art, basic is to be related to photomultiplier installation to be protected from the anti-of physical impacts
Protection unit, it is basic without reference to so for problem above, with regard to photomultiplier wader for photomultiplier water-tight device
Aspect is put, it is necessary to which a kind of waterproof frock, can allow photomultiplier to realize good water resistance by supporting frock.
Utility model content
In view of this, the utility model provides a kind of photomultiplier waterproof frock, and realizing photomultiplier has
Encapsulate the effect of waterproof.
The technological means that the utility model is used is as follows:A kind of photomultiplier waterproof frock, including water string and anti-
Water pipe cap, the water string can fill the hollow structure of neutral silica gel for inside, and the upper end of the water string, which is provided with, to be used for
The clamping part of fixed photomultiplier afterbody, the lower end of the water string is connected with the waterproof pipe cap, the water string
Side be provided with and be used to draw the through hole of photomultiplier bleeder circuit lead, the through hole is connected with tube seat.
Preferably, the lower end of the water string is connected through a screw thread with the waterproof pipe cap.
Preferably, the upper end of the water string is shaped as circular or square.
Preferably, the clamping part includes the clamping plate for being symmetrically mounted on the water string upper end.
Preferably, the clamping plate is shaped as linear or L-shaped.
Preferably, the heat-shrinkable T bush of water string described in sealing-in is also included.
Preferably, the tube seat for cylinder.
Using a kind of photomultiplier waterproof frock provided by the utility model, with following benefit:
Matched by the screw thread of water string and waterproof pipe cap so that the afterbody of photomultiplier is protected, and in water
In environment under when working multilayer flashing packaged type can reach good waterproof effect;Pass through clamping part so that waterproof jacket
Installation is fixed to photomultiplier afterbody in pipe.
Brief description of the drawings
Fig. 1 is the structural representation of photomultiplier in the utility model photomultiplier waterproof frock;
Fig. 2 is the structural representation of the utility model photomultiplier waterproof frock;
Fig. 3 is the schematic cross-section of waterproof pipe cap in the utility model photomultiplier waterproof frock;
Fig. 4 is the structural representation of the utility model photomultiplier waterproof frock and photomultiplier;
Fig. 5 is schematic cross-section of the water string along A-A in Fig. 4;
Fig. 6 is the schematic cross-section of the utility model photomultiplier waterproof frock and photomultiplier;
Fig. 7 is the schematic cross-section of the water string of the utility model photomultiplier waterproof frock embodiment 2.
In figure:1 water string, 2 waterproof pipe sleeves, 3 photomultipliers, 4 clamping parts, 5 screw threads, 6 through holes, 7 tube seats, 8 pyrocondensations
Sleeve pipe, 31 metal pins, 32 bleeder circuit plates.
Embodiment
Principle of the present utility model and feature are described below in conjunction with accompanying drawing, example is served only for explaining this practicality
It is new, it is not intended to limit scope of the present utility model.
Embodiment 1
As shown in figs. 1 to 6:A kind of photomultiplier waterproof frock, including water string 1 and waterproof pipe cap 2, the waterproof
Sleeve pipe 1 can fill the hollow structure of neutral silica gel for inside.The upper end of the water string 1 is shaped as circle, and matching afterbody is
Circular photomultiplier 3, the upper end of the water string 1 is provided with the clamping part 4 for being used for fixing the afterbody of photomultiplier 3, institute
To state clamping part 4 include being symmetrically mounted on the clamping plate of the upper end of water string 1, and the clamping plate is shaped as linear, more can
The effect of waterproof is carried out with circular photomultiplier 3.The lower end of the water string 1 is shaped as circle, and with the guard tube
Cap 2 is connected by the way that screw thread 5 is inside and outside.The side of the water string 1, which is provided with, to be used to draw the bleeder circuit lead of photomultiplier 3
Through hole 6, the through hole 6 is connected with the tube seat 7 of cylinder, and the internal diameter of the through hole 6 is identical with the internal diameter of the tube seat 7, described
The length of tube seat 7 is 10cm or so, can more match other parts and installation is fixed, and be easy to drawing for the afterbody of photomultiplier 3
Line is drawn from tube seat 7.Also include the heat-shrinkable T bush 8 of water string 1 described in sealing-in, further prevent that junction is difficult infiltration, rise
To good waterproof effect.
Application method:The metal pin 31 and bleeder circuit plate 32 of the afterbody of photomultiplier 3 are welded together first, will
The afterbody of photomultiplier 3 is passed through together with the upper end open of bleeder circuit plate from water string 1, and by the lead of bleeder circuit plate from
Tube seat 7 is drawn.The position of waterproof frock and photomultiplier 3 is aligned, it is past by the end portion opening of water string 1 with glue rifle
The cavity bottom surrounding of water string 1 uniformly applies last layer epoxide resin AB glue, after solidification, in the spray of the surface of bleeder circuit plate 32
Apply one layer of three-proofing coating.Neutral silica gel is filled toward the cavity of water string 1 at the lower ending opening of water string 1 again, in order to avoid once
Property the problem of fill too many neutral silica gel and be difficult to fixed line, the mode for be layered multiple encapsulating can be taken, waited after the solidification of last time encapsulating
The action of the encapsulating of next time is carried out again.Excessive gap, particularly partial pressure can be avoided the occurrence of during encapsulating by way of extruding
Gap or bubble should not occur in the glue on the top layer of circuit board 32, otherwise may result in the feelings that electric discharge electric leakage occurs in electronic device
Condition.After the cavity of water string 1 all fills silica gel and is fully cured, waterproof pipe cap 2 and the end portion of water string 1 are led to
Cross screw thread and tighten fixation, and with epoxide resin AB glue by between waterproof pipe cap 2 and lower end outer wall and upper part and photomultiplier transit
The gap of the afterbody junction of pipe 3 is filled.After after the solidification of epoxide resin AB glue 9, this is sealed at two with heat-shrinkable T bush 8 respectively
Connect.Lead on the bleeder circuit plate 32 of photomultiplier is drawn from the tube seat 7 is inner, with epoxide resin AB glue by lead and pipe
Gap between the external port of groove 7 is filled up, finally good with the sealing-in of heat-shrinkable T bush 8 between lead and tube seat 7.
Embodiment 2
As shown in Figure 7:The difference of the embodiment and embodiment 1 is, the upper end of the water string 1 be shaped as it is square,
Matching afterbody is square photomultiplier 3, and the upper end of the water string 1, which is provided with, to be used to fix the afterbody of photomultiplier 3
Clamping part 4, the clamping part 4 includes being symmetrically mounted on the clamping plate of the upper end of water string 1, and the clamping plate is shaped as L-shaped,
The effect that square photomultiplier 3 carries out waterproof can more be matched.
In summary, using a kind of photomultiplier waterproof frock provided by the utility model, by water string 1 and
The screw thread matching of waterproof pipe cap 2 so that the afterbody of photomultiplier 3 is protected, and multilayer when being worked under the environment in water
Waterproof enclosure mode can reach good waterproof effect;Pass through clamping part 4 so that water string 1 is to the afterbody of photomultiplier 3
Installation is fixed.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modifications, equivalent substitutions and improvements done etc. should be included in the utility model
Within the scope of protection.