A crystal package structure

Abstract

This utility model belongs to the field of material packaging technology, specifically relating to a crystal packaging structure. It includes a housing with a hollow interior, in which a scintillation crystal is encapsulated. The housing has openings at both ends. A light guide component is disposed at the first opening of the housing and coupled to the light-emitting surface of the scintillation crystal. A first sealing ring fills the end of the light guide component away from the scintillation crystal, sealing the first opening of the housing. A second sealing ring fills the housing at the end of the scintillation crystal away from the light guide component, sealing the second opening of the housing. A fixing cap closes the second opening of the housing. This utility model addresses the problem of poor performance and low efficiency that often occurs with adhesive encapsulation. By utilizing the sealing cooperation of the first and second sealing rings, a seal is achieved, avoiding the need for prolonged fixation with adhesive. Furthermore, without adhesive fixation, it avoids the problems of aging and leakage caused by adhesive under long-term high temperatures, and the performance degradation caused by adhesive evaporation.

Description

Technical Field

[0001] This utility model belongs to the field of material packaging technology, specifically relating to a crystal packaging structure. Background Technology

[0002] The core function of scintillation crystals is to convert the energy of X-rays, gamma rays, and other high-energy particles into visible or ultraviolet light, enabling precise measurement of invisible rays.

[0003] Some scintillation crystals, such as sodium iodide, cesium iodide, lanthanum chloride, lanthanum bromide, cerium chloride, and cerium bromide, are hygroscopic and therefore must be sealed in a dry environment to isolate them from the natural environment during use.

[0004] Currently, the main packaging technology uses a sealed can to isolate the external environment, seals the windows and back cover with adhesives such as epoxy resin, and uses materials such as polytetrafluoroethylene and magnesium oxide or titanium oxide for reflection to fix the crystal in the can.

[0005] However, this method has several drawbacks: First, the device is used at a maximum temperature of 175°C, and the adhesive will age at high temperatures, gradually deteriorating in strength and sealing, thus reducing device performance. Second, the adhesive will slightly volatilize at 150°C, and the volatilized adhesive will be absorbed by internal components within the device, which will also reduce device performance. Third, the use of adhesive in the encapsulation process is time-consuming and inefficient because adhesive requires a curing and stabilization time. Utility Model Content

[0006] To address the shortcomings of existing technologies, a crystal packaging structure is provided to solve the problems of poor performance and low efficiency that easily occur with glue packaging.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A crystal packaging structure, comprising:

[0008] A housing, the housing being hollow inside and containing a scintillation crystal, the housing being open at both ends;

[0009] A light guide assembly is disposed at the opening at the first end of the housing and coupled to the light-emitting surface of the scintillation crystal;

[0010] A first sealing ring is filled on the light guide assembly at the end away from the scintillation crystal to seal the first end opening of the housing.

[0011] The second sealing ring is filled in the housing at the end of the scintillation crystal away from the light guide assembly, and is used to seal the second end opening of the housing;

[0012] A fixed cover is provided to seal the second end opening of the housing.

[0013] Compared with existing technologies, the above technical solutions have the following beneficial effects:

[0014] By inserting a scintillation crystal into the housing, and using light guide components and fixing covers at both ends of the scintillation crystal to guide light and seal it, while using a first sealing ring and a second sealing ring to achieve a seal, the use of glue for long-term fixation is avoided. Moreover, without using glue for fixation, the materials of the housing and light guide components can be freely selected without being limited by the performance of the glue. Furthermore, it avoids the problems of aging and leakage caused by long-term high temperature of the glue and the performance degradation caused by glue volatilization.

[0015] Based on the above technical solution, the embodiments of this application can be further improved as follows:

[0016] In one embodiment, a buffer layer is filled between the scintillation crystal and the housing.

[0017] By adding a buffer layer, the scintillation crystal can be protected from cracking when used in high-vibration environments.

[0018] In one embodiment, the light guide component includes:

[0019] An optical guide element covers the ends of the scintillation crystal and the buffer layer;

[0020] A light-emitting window is provided, which covers the top of the light guide. The top of the light-emitting window is provided with a step for accommodating the first sealing ring. The light-emitting window is sealed to the first end of the housing through the first sealing ring.

[0021] A step is made on the light-emitting window and it is matched with the first sealing ring so that the light-emitting window can form a seal with the first end of the housing through the first sealing ring.

[0022] In one embodiment, the light guide is an elastic light guide.

[0023] The light guide is made into an elastic component, so that there is a certain elasticity between the light output window and the scintillation crystal, thus avoiding damage caused by hard contact on the surface of the scintillation crystal.

[0024] In one embodiment, the inner wall of the buffer layer is provided with a reflective layer covering the periphery of the scintillation crystal.

[0025] In one embodiment, an elastic component is further included, disposed at the end of the scintillation crystal away from the light guide component, for pushing the scintillation crystal to fit tightly against the light guide component.

[0026] The elastic component can keep the scintillation crystal in contact with the light guide component, ensuring continuous contact and light output. The elastic potential energy of the elastic component is used to provide a certain pressure to the crystal to ensure the shrinkage space of the crystal when heated and the mechanical force between the crystal and the light guide sheet and between the first sealing ring and the housing.

[0027] In one embodiment, the resilient component includes:

[0028] An elastic element is installed at the bottom of the scintillation crystal;

[0029] Two gaskets are respectively abutted against both ends of the elastic member.

[0030] In one embodiment, the device further includes a snap-fit ​​component, wherein a snap-fit ​​groove is provided on the inner wall of the housing, the snap-fit ​​component is matched and snapped into the snap-fit ​​groove, and the snap-fit ​​positioning component abuts against the surface of the pad away from the scintillation crystal.

[0031] The snap-fit ​​component, which snaps into the slot, holds the bottom of the elastic component in place, ensuring that the elastic potential energy of the elastic component pushes the scintillation crystal upwards.

[0032] In one embodiment, a fixing member is further included. The bottom end of the fixing member abuts against the fixing cover, and the top end of the fixing member is provided with a first step groove for fixing the second sealing ring. A second step groove is provided on the inner wall of the second end of the housing. The second step groove and the first step groove diagonally clamp and fix the second sealing ring.

[0033] The second step groove in the housing and the first step groove on the fastener are used to diagonally lock the second sealing ring, so that the second sealing ring can be locked and fixed stably, and the sealing effect is good. Attached Figure Description

[0034] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic cross-sectional view of the overall structure of this utility model.

[0036] Figure label:

[0037] 1. First sealing ring; 2. Second sealing ring; 3. Housing; 4. Scintillation crystal; 5. Light guide assembly; 6. Fixing cover; 7. Buffer layer; 8. Reflective layer; 9. Elastic component; 10. Slot; 11. Fixing element; 12. First step groove; 13. Second step groove;

[0038] 501. Light-emitting window component; 502. Light guide component; 503. Step;

[0039] 901. Gasket; 902. Elastic component; 903. Snap-fit ​​component. Detailed Implementation

[0040] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0041] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0042] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] like Figure 1 As shown, the crystal packaging structure provided by this utility model includes: a shell 3, a light guide component 5, a first sealing ring 1, a second sealing ring 2, and a fixing cover 6.

[0046] The housing 3 is cylindrical and hollow inside, encapsulating a scintillation crystal 4. The scintillation crystal 4 is cylindrical and can be a hygroscopic crystal such as lanthanum bromide, sodium iodide, cerium bromide, or lanthanum bromide, lithium, or cesium. The housing 3 is open at both ends. A light guide component 5 is disposed at the first opening of the housing 3. Specifically, the light guide component 5 is located at the top of the housing 3 and is fixed to the housing 3 by a snap-fit ​​connection. The light guide component 5 is coupled to the light-emitting surface of the scintillation crystal 4. The scintillation crystal 4 is coupled through the light guide component 5. There is no gap between the crystal and the light guide component 5, so the light emitted by the crystal can pass through this structure with minimal loss.

[0047] The first sealing ring 1 is filled on the end of the light guide assembly 5 away from the scintillation crystal 4 to seal the first end opening of the housing 3. The second sealing ring 2 is filled in the housing 3 at the end of the scintillation crystal 4 away from the light guide assembly 5 to seal the second end opening of the housing 3. The fixing cover 6 is closed at the second end opening of the housing 3. The first sealing ring 1 can make the light window at the top of the housing 3 seal with the housing 3 by pressing. The second sealing ring 2 will ensure that the crystal is completely sealed in the housing 3 by pressing it tightly with the fixing cover 6.

[0048] By inserting a scintillation crystal 4 into the housing 3, and using a light guide component 5 and a fixing cover 6 at both ends of the scintillation crystal 4 to guide light and seal it, and using a first sealing ring 1 and a second sealing ring 2 to achieve a seal, the use of glue for long-term fixation is avoided. Moreover, without using glue for fixation, the materials of the housing 3 and the light guide component 5 can be freely selected without being limited by the performance of the glue. For example, the light guide component can be made of optical glass, quartz, sapphire, calcium fluoride, etc., and the problems of aging and leakage caused by glue under long-term high temperature and the degradation of device performance caused by glue volatilization are avoided.

[0049] The buffer layer 7 protects the scintillation crystal 4 from cracking when used in high-vibration environments.

[0050] In this embodiment, the light guide component 5 includes: a light guide 502 and a light-emitting window 501.

[0051] The light guide 502 covers the ends of the scintillation crystal 4 and the buffer layer 7;

[0052] Specifically, the light guide 502 is an elastic light guide, which can be made of elastic transparent rubber.

[0053] The light guide 502 is set as an elastic element 902, so that there is a certain elasticity between the light output window 501 and the scintillation crystal 4, so as to avoid damage caused by hard contact on the surface of the scintillation crystal 4.

[0054] The light-emitting window 501 covers the top of the light guide 502. Specifically, the light-emitting window 501 can be made of materials such as quartz, sapphire, optical glass, or calcium fluoride. The top of the light-emitting window 501 is provided with a step 503 for accommodating the first sealing ring 1. The first sealing ring 1 is fitted onto the step 503 of the light-emitting window 501 and abuts against the surface of the step 503. A limiting ring corresponding to the step 503 is provided on the first end of the housing 3. The limiting ring and the step 503 clamp the first sealing ring 1. The light-emitting window 501 is used to press and fix the first sealing ring 1, so that the light-emitting window 501 is sealed and connected to the first end of the housing 3 through the first sealing ring 1.

[0055] A step 503 is provided on the light-emitting window 501 and cooperates with the first sealing ring 1 so that the light-emitting window 501 can form a seal with the first end of the housing 3 through the first sealing ring 1.

[0056] In this embodiment, a buffer layer 7 is filled between the scintillation crystal 4 and the housing 3. The buffer layer 7 can be made of silicone heat shrink tubing, which is sleeved on the outer peripheral surface of the crystal. The silicone heat shrink tubing outside the reflective layer 8 material serves as the buffer layer 7 between the crystal and the housing 3, which can protect the crystal from cracking due to collision with the housing during vibration.

[0057] To improve reflection efficiency, a reflective layer 8 is provided on the inner wall of the buffer layer 7, covering the periphery of the scintillation crystal 4. The reflective layer 8 can reflect the light emitted by the crystal, minimizing the loss of light signal. The reflective layer 8 is made of polytetrafluoroethylene or ESR material from 3M.

[0058] In this embodiment, an elastic component 9 is also included. The elastic component 9 is disposed at the end of the scintillation crystal 4 away from the light guide component 5, and is used to push the scintillation crystal 4 to fit tightly against the light guide component 5.

[0059] The elastic component 9 can keep the scintillation crystal 4 in contact with the light guide component 5, ensuring continuous contact and light output. The elastic potential energy of the elastic component 9 is used to provide a certain pressure to the crystal to ensure the shrinkage space of the crystal when heated and the mechanical force between the crystal and the light guide sheet, as well as between the first sealing ring 1 and the housing 3.

[0060] Specifically, the elastic component 9 not only abuts against the bottom of the scintillation crystal 4, but also against the bottom of the buffer layer 7. The two ends of the crystal are held by the elastic component 9 and the light guide component 5. The reflective layer 8 and the buffer layer 7 cover the outer periphery of the crystal, sealing the crystal. The elastic component 9 can push the crystal, i.e. the buffer layer 7, upward as a whole.

[0061] Specifically, the elastic component 9 includes an elastic element 902 and two gaskets 901. The elastic element 902 is installed at the bottom of the scintillation crystal 4, and the two gaskets 901 respectively abut against the two ends of the elastic element 902.

[0062] The elastic element 902 can be implemented using a spring, and the gasket 901 can be implemented using a metal gasket to prevent the spring end from damaging the bottom of the crystal.

[0063] It also includes a snap-fit ​​component 903, which can be implemented by a snap-fit ​​spring. The inner wall of the housing 3 has a snap-fit ​​groove 10. The snap-fit ​​component 903 is matched and snapped into the snap-fit ​​groove 10, and the snap-fit ​​positioning component abuts against the surface of the pad 901 away from the scintillation crystal 4. That is, the elastic component 9 is disposed entirely between the snap-fit ​​component 903 and the crystal. The bottom pad 901 contacts the snap-fit ​​spring, and the top pad 901 contacts the bottom of the crystal.

[0064] By using the snap-fit ​​component 903 that snaps into the slot 10, the bottom of the elastic component 9 can be held in place, ensuring that the elastic potential energy of the elastic component 9 pushes the scintillation crystal 4 upward.

[0065] In this embodiment, a fixing member 11 is also included. The fixing member 11 is an annular fixing member used to fix the second sealing ring 2. The bottom end of the fixing member 11 abuts against the fixing cover 6. The top end of the fixing member 11 is provided with a first stepped groove 12 for fixing the second sealing ring 2. The opening of the first stepped groove 12 faces upward and outward. A second stepped groove 13 is provided on the inner wall of the second end of the housing 3. The second stepped groove 13 faces downward and inward. The second stepped groove 13 and the first stepped groove 12 diagonally clamp and fix the second sealing ring 2.

[0066] The second step groove 13 in the housing 3 and the first step groove 12 on the fixing member 11 are used to diagonally lock the second sealing ring 2, so that the second sealing ring 2 can be locked and fixed stably, and the sealing effect is good. The bottom of the fixing member 11 can be pressed and fixed again by the fixing cover 6 to press and deform the second sealing ring 2 to seal it.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A crystal packaging structure, characterized in that, include: A housing, the housing being hollow inside and containing a scintillation crystal, the housing being open at both ends; A light guide assembly is disposed at the opening at the first end of the housing and coupled to the light-emitting surface of the scintillation crystal; A first sealing ring is filled on the light guide assembly at the end away from the scintillation crystal to seal the first end opening of the housing. The second sealing ring is filled in the housing at the end of the scintillation crystal away from the light guide assembly, and is used to seal the second end opening of the housing; A fixed cover is provided to seal the second end opening of the housing.

2. The crystal packaging structure according to claim 1, characterized in that, A buffer layer is filled between the scintillation crystal and the housing.

3. The crystal packaging structure according to claim 2, characterized in that, The optical guide component includes: An optical guide element covers the ends of the scintillation crystal and the buffer layer; A light-emitting window is provided, which covers the top of the light guide. The top of the light-emitting window is provided with a step for accommodating the first sealing ring. The light-emitting window is sealed to the first end of the housing through the first sealing ring.

4. The crystal packaging structure according to claim 3, characterized in that, The light guide is an elastic light guide.

5. The crystal packaging structure according to claim 2, characterized in that, The inner wall of the buffer layer is provided with a reflective layer covering the periphery of the scintillation crystal.

6. The crystal packaging structure according to claim 1, characterized in that, It also includes an elastic component disposed at the end of the scintillation crystal away from the light guide component, for pushing the scintillation crystal to fit tightly against the light guide component.

7. The crystal packaging structure according to claim 6, characterized in that, The elastic component includes: An elastic element is installed at the bottom of the scintillation crystal; Two gaskets are respectively abutted against both ends of the elastic member.

8. The crystal packaging structure according to claim 7, characterized in that, It also includes a snap-fit ​​component, wherein a snap-fit ​​groove is provided on the inner wall of the housing, the snap-fit ​​component is matched and snapped into the snap-fit ​​groove, and the snap-fit ​​component abuts against the surface of the pad away from the scintillation crystal.

9. The crystal packaging structure according to claim 1, characterized in that, It also includes a fixing member, the bottom end of which abuts against the fixing cover, and the top end of which is provided with a first step groove for fixing the second sealing ring. A second step groove is provided on the inner wall of the second end of the housing, and the second step groove and the first step groove are diagonally clamped and fixed to the second sealing ring.

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