CN204347265U - A kind of nuclear radiation detector explosion-proof sealing device of improvement - Google Patents

Abstract

The utility model discloses a kind of nuclear radiation detector explosion-proof sealing device of improvement, comprise shell body, the opening part of shell body is fixed with annular bottom plate, annular roof plate and the first O-ring seal, the bottom of described shell body is fixed with inner housing by rubber blanket, the both sides of inner housing are connected to shell body by horizontally disposed first spring body, the both sides of inner housing are also connected to shell body respectively by the second spring body and the 3rd spring body, the inside of the second spring body and the 3rd spring body is respectively arranged with a backstay, the top of backstay is provided with rubber sphere, the top of inner housing is provided with opening, opening part is fixedly installed metal sealing sheet, metal sealing sheet comprises elastic metallic diaphragm, the outside of elastic metallic diaphragm is connected with endless metal circle, endless metal circle comprises the first end to end sheet metal, second sheet metal and the 3rd sheet metal.The utility model can improve the deficiencies in the prior art, improves the protected effect of nuclear radiation detector.

Description

A kind of nuclear radiation detector explosion-proof sealing device of improvement

Technical field

The utility model relates to nuclear radiation detection technical field, especially a kind of nuclear radiation detector explosion-proof sealing device of improvement.

Background technology

In the cylindrical shell of nuclear radiation detector, often all control circuit board is installed, for the treatment of the electric signal that detector produces because of radiation environment impact.Reliable axial seal structure, can prevent the moisture in air and dust from entering detector inside, thus ensure that the drying of inner control circuit board and clean, and then ensure that the good detection performance of detector, and extends the serviceable life of detector.Chinese utility model patent CN 203770632 U discloses a kind of axial seal structure of radiation detector, realizes the sealing inside and outside housing by crush seal circle.This structure can play good sealing effectiveness when normal use, but when detector receives external force collision, sealing position is easy to occur loosening and crack, causes hermetically-sealed construction to lose efficacy.

Utility model content

The technical problems to be solved in the utility model is to provide a kind of nuclear radiation detector explosion-proof sealing device of improvement, can solve the deficiencies in the prior art, improves the protected effect of nuclear radiation detector.

For solving the problems of the technologies described above, technical solution adopted in the utility model is as follows.

A kind of nuclear radiation detector explosion-proof sealing device of improvement, comprise shell body, the opening part of shell body is fixed with annular bottom plate, outside annular bottom plate, selectivity is connected with annular roof plate, the first O-ring seal is clamped with between annular bottom plate and annular roof plate, the lateral wall of the first O-ring seal seals with shell body and contacts, the bottom of described shell body is fixed with inner housing by rubber blanket, shell body and inner housing are provided with vacuum outlet port, control circuit board is fixed in inner housing, the both sides of inner housing are connected to shell body by horizontally disposed first spring body, the both sides of inner housing are also connected to shell body respectively by the second spring body and the 3rd spring body, second spring body tilts upward setting, angle between second spring body and the first spring body is 25 °, 3rd spring body is tilted to lower setting, the angle of the 3rd spring body and the first spring body is 40 °, the inside of the second spring body and the 3rd spring body is respectively arranged with a backstay, the end of backstay is fixed on shell body, the top of backstay is provided with rubber sphere, rubber sphere and inner housing selective exposure, the top of inner housing is provided with opening, opening part is fixedly installed metal sealing sheet, metal sealing sheet comprises elastic metallic diaphragm, the outside of elastic metallic diaphragm is connected with endless metal circle, endless metal circle comprises the first end to end sheet metal, second sheet metal and the 3rd sheet metal, first sheet metal, second sheet metal and the 3rd sheet metal composition zigzag shape, the top of the first sheet metal is fixed with arc spring lamination, the junction of the second sheet metal and the 3rd sheet metal is fixed with the second O-ring seal, the opening part of inner housing is provided with the mounting groove matched with endless metal circle.

As preferably, described shell body is provided with through hole, is movably set with piston cap in through hole, the arranged outside of through hole has transparent sealed cover.

As preferably, the outer rim place of described first O-ring seal is fixed with metal clips.

The beneficial effect adopting technique scheme to bring is: the utility model changes in prior art and uses the contact of O-ring seal and shell body to realize single hermetically-sealed construction; by arranging the housing of inside and outside two sealings; and optimize inner housing be connected and fixed structure, significantly improve the protected effect of its inner control circuit board placed.Inner housing is fixed in shell body by rubber blanket, while playing positioning action, by changing the resonant frequency of connector, inner and outer shell can be avoided to resonate.Inner housing uses the first spring body to reinforce simultaneously, and the first spring body to cushioning with significantly vibrating, can reduce the amplitude that control circuit board is vibrated.Second spring body and the 3rd spring body, in the anisopleual setting of inner housing, after the first spring body generation elastic deformation, can be eliminated the vibration that this deformation produces fast.When vibration occurs the first spring body, alternately can be cushioned by the second spring body and the 3rd spring body, due to the asymmetric connection of two spring bodies, the cushion effect of both sides is not identical, avoids the first spring body to occur periodic swinging.Backstay can limit the maximum vibration displacement of inner housing.When damaged leakage occurs the first O-ring seal, the effect that elastic metallic diaphragm is subject to atmospheric pressure caves inward, and drives endless metal circle and mounting groove that mutual extruding occurs further immediately, improves the tight ness rating that endless metal circle coordinates with mounting groove.Due to the first sheet metal, the second sheet metal and the 3rd sheet metal composition zigzag shape, endless metal circle and mounting groove can be made to form multiple sealing surface.The arc spring lamination of independent setting and the second O-ring seal can improve the sealing effectiveness between endless metal circle and mounting groove further, arc spring lamination is positioned at the outside of the second O-ring seal, effectively can stop the second O-ring seal to contact with external environment, improve the reliability that the second O-ring seal carries out sealing.When the vacuum in shell body occurs to destroy, lose pressure differential inside and outside piston cap, piston cap just can move up and down flexibly in through hole, by observing the state of piston cap, can learn whether shell body vacuum breakage occurs easily.The outer rim of the first O-ring seal is divided into upper and lower two parts by metal clips, the contact of the first O-ring seal and shell body is made to define three layers of (outside the first O-ring seal, inside metal clips, the first O-ring seal) sealing contact surface, improve sealing effectiveness, meanwhile metal clips also improves the integral rigidity of the first O-ring seal.

Accompanying drawing explanation

Fig. 1 is the structural drawing of the utility model embodiment.

In figure: 1, shell body; 2, annular bottom plate; 3, annular roof plate; 4, the first O-ring seal; 5, rubber blanket; 6, inner housing; 7, the first spring body; 8, the 3rd spring body; 9, the second spring body; 10, backstay; 11, rubber sphere; 12, elastic metallic diaphragm; 13, the first sheet metal; 14, the second sheet metal; 15, the 3rd sheet metal; 16, arc spring lamination; 17, the second O-ring seal; 18, mounting groove; 19, vacuum outlet port; 20, through hole; 21, piston cap; 22, transparent sealed cover; 23, metal clips; 24, control circuit board; 25, anti-guncotton layer.

Embodiment

With reference to Fig. 1, the utility model embodiment comprises shell body 1, the opening part of shell body 1 is fixed with annular bottom plate 2, outside annular bottom plate 2, selectivity is connected with annular roof plate 3, the first O-ring seal 4 is clamped with between annular bottom plate 2 and annular roof plate 3, the lateral wall of the first O-ring seal 4 seals with shell body 1 and contacts, the bottom of described shell body 1 is fixed with inner housing 6 by rubber blanket 5, shell body 1 and inner housing 6 are provided with vacuum outlet port 19, control circuit board 24 is fixed in inner housing 6, the both sides of inner housing 6 are connected to shell body 1 by horizontally disposed first spring body 7, the both sides of inner housing 6 are also connected to shell body 1 respectively by the second spring body 9 and the 3rd spring body 8, second spring body 9 tilts upward setting, angle between second spring body 9 and the first spring body 7 is 25 °, 3rd spring body 8 is tilted to lower setting, the angle of the 3rd spring body 8 and the first spring body 7 is 40 °, the inside of the second spring body 9 and the 3rd spring body 8 is respectively arranged with a backstay 10, the end of backstay 10 is fixed on shell body 1, the top of backstay 10 is provided with rubber sphere 11, rubber sphere 11 and inner housing 6 selective exposure, the top of inner housing 6 is provided with opening, opening part is fixedly installed metal sealing sheet, metal sealing sheet comprises elastic metallic diaphragm 12, the outside of elastic metallic diaphragm 12 is connected with endless metal circle, endless metal circle comprises the first end to end sheet metal 13, second sheet metal 14 and the 3rd sheet metal 15, first sheet metal 13, second sheet metal 14 and the 3rd sheet metal 15 form zigzag shape, the top of the first sheet metal 13 is fixed with arc spring lamination 16, the junction of the second sheet metal 14 and the 3rd sheet metal 15 is fixed with the second O-ring seal 17, the opening part of inner housing 6 is provided with the mounting groove 18 matched with endless metal circle.Inner housing 6 is fixed in shell body 1 by rubber blanket 5, while playing positioning action, by changing the resonant frequency of connector, inner and outer shell can be avoided to resonate.Inner housing 6 uses the first spring body 7 to reinforce simultaneously, and the first spring body 7 to cushioning with significantly vibrating, can reduce the amplitude that control circuit board 24 is vibrated.Second spring body 9 and the 3rd spring body 8, in the anisopleual setting of inner housing 6, after elastic deformation occurs the first spring body 7, can be eliminated the vibration that this deformation produces fast.When vibration occurs the first spring body 7, alternately can be cushioned by the second spring body 9 and the 3rd spring body 8, due to the asymmetric connection of two spring bodies, the cushion effect of both sides is not identical, avoids the first spring body 7 to occur periodic swinging.Backstay 10 can limit the maximum vibration displacement of inner housing 6.When damaged leakage occurs the first O-ring seal 4, the effect that elastic metallic diaphragm 12 is subject to atmospheric pressure caves inward, and drives endless metal circle and mounting groove 18 to occur mutually to extrude further immediately, improves the tight ness rating that endless metal circle coordinates with mounting groove.Because the first sheet metal 13, second sheet metal 14 and the 3rd sheet metal 15 form zigzag shape, endless metal circle and mounting groove can be made to form multiple sealing surface.The arc spring lamination 16 of independent setting and the second O-ring seal 17 can improve the sealing effectiveness between endless metal circle and mounting groove 18 further, arc spring lamination 16 is positioned at the outside of the second O-ring seal 17, effectively can stop the second O-ring seal 17 to contact with external environment, improve the reliability that the second O-ring seal 17 carries out sealing.Shell body 1 is provided with through hole 20, is movably set with piston cap 21 in through hole 20, the arranged outside of through hole 20 has transparent sealed cover 22.When the vacuum in shell body 1 occurs to destroy, lose pressure differential inside and outside piston cap 21, piston cap 21 just can move up and down flexibly in through hole 20, by observing the state of piston cap 21, can learn whether shell body 1 vacuum breakage occurs easily.The outer rim place of the first O-ring seal 4 is fixed with metal clips 23, the outer rim of the first O-ring seal 4 is divided into upper and lower two parts by metal clips 23, the first O-ring seal 4 is made to define three-layer sealed surface of contact with the contact of shell body 1, improve sealing effectiveness, meanwhile metal clips 23 also improves the integral rigidity of the first O-ring seal 4.

In addition, because the utility model have employed the structure of inside and outside two side bodies, by the vacuum insulation between two housings, the heat of shell body 1 outside is difficult to be passed on inner housing 6, this just can realize without the need at the anti-guncotton of outer setting, only arrange anti-guncotton layer 25 in the inside of inner housing 6, anti-guncotton layer 25 also serves the effect of the vibration between buffer control circuit plate 25 and inner housing 6 in inner housing 6.

Wherein, the utility model be the patent documentation quoted in the introduction basis on improve, the sealing of shell body and carry out the common practise that vacuum drawn belongs to those skilled in the art by vacuum drawn mouth, is not described in detail in this.

More than show and describe ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof .

Claims (3)

1. the nuclear radiation detector explosion-proof sealing device improved, comprise shell body (1), the opening part of shell body (1) is fixed with annular bottom plate (2), annular bottom plate (2) outside selectivity is connected with annular roof plate (3), the first O-ring seal (4) is clamped with between annular bottom plate (2) and annular roof plate (3), the lateral wall of the first O-ring seal (4) seals with shell body (1) and contacts, it is characterized in that: the bottom of described shell body (1) is fixed with inner housing (6) by rubber blanket (5), shell body (1) and inner housing (6) are provided with vacuum outlet port (19), control circuit board (24) is fixed in inner housing (6), the both sides of inner housing (6) are connected to shell body (1) by horizontally disposed first spring body (7), the both sides of inner housing (6) are also connected to shell body (1) respectively by the second spring body (9) and the 3rd spring body (8), second spring body (9) tilts upward setting, angle between second spring body (9) and the first spring body (7) is 25 °, 3rd spring body (8) is tilted to lower setting, 3rd spring body (8) is 40 ° with the angle of the first spring body (7), the inside of the second spring body (9) and the 3rd spring body (8) is respectively arranged with a backstay (10), the end of backstay (10) is fixed on shell body (1), the top of backstay (10) is provided with rubber sphere (11), rubber sphere (11) and inner housing (6) selective exposure, the top of inner housing (6) is provided with opening, opening part is fixedly installed metal sealing sheet, metal sealing sheet comprises elastic metallic diaphragm (12), the outside of elastic metallic diaphragm (12) is connected with endless metal circle, endless metal circle comprises end to end the first sheet metal (13), second sheet metal (14) and the 3rd sheet metal (15), first sheet metal (13), second sheet metal (14) and the 3rd sheet metal (15) composition zigzag shape, the top of the first sheet metal (13) is fixed with arc spring lamination (16), second sheet metal (14) is fixed with the second O-ring seal (17) with the junction of the 3rd sheet metal (15), the opening part of inner housing (6) is provided with the mounting groove (18) matched with endless metal circle.

2. the nuclear radiation detector explosion-proof sealing device of improvement according to claim 1, it is characterized in that: described shell body (1) is provided with through hole (20), be movably set with piston cap (21) in through hole (20), the arranged outside of through hole (20) has transparent sealed cover (22).

3. the nuclear radiation detector explosion-proof sealing device of improvement according to claim 1, is characterized in that: the outer rim place of described first O-ring seal (4) is fixed with metal clips (23).