Double-ring glass for radiation-resistant camera and radiation-resistant camera

Abstract

The invention discloses double-ring glass for an irradiation-resistant camera and the irradiation-resistant camera, and relates to the technical field of radioactive environment equipment. The double-ring glass comprises inner ring glass, an isolating ring and outer ring glass; wherein the inner ring glass serves as an insert, and the inner ring glass is connected with the inner circumference of the isolating ring in an insert injection molding mode to form an integral structure; the outer ring glass is connected with the periphery of the isolating ring in a clamping mode, and a sealing structure is arranged between the outer ring glass and the isolating ring. The irradiation-resistant camera comprises the double-ring glass for the irradiation-resistant camera. According to the double-ring glass for the radiation-resistant camera, provided by the invention, a light source is effectively prevented from entering a visual field of a lens through various reflections or refractions; the structure is simple and easy to machine and assemble; the water-proof and dust-proof effects are obviously improved; and when the components are all made of radiation-resistant materials, the radiation-resistant performance is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of radioactive environment equipment, and in particular to a double-ring glass for a radiation-resistant camera and a radiation-resistant camera. Background Art

[0002] Radiation-resistant cameras play a huge role in the operation and maintenance of nuclear facilities. In pipeline inspections in irradiated environments, the requirements for miniaturization of radiation-resistant cameras are getting higher and higher. The smaller the outer diameter of the camera, the more advantages it has in pipeline inspections in complex environments. At the same time, because there is no good lighting environment inside the irradiated pipeline, the light source of ordinary cameras cannot provide enough illumination to see the scene inside the pipeline clearly. Therefore, when radiation-resistant cameras are used in such scenarios, they need to have a light source with sufficient illumination to ensure that the inside of the pipeline is unobstructed. Under more extreme requirements, by improving the intensity and uniformity of the light source illumination, supplemented by high-resolution camera tubes, movements, lenses and other components, it can also be used for visual inspection of the fine structure and state of the internal surface of the pipeline, such as cracks, welds, internal abnormal features and their sizes. If supplemented by 3D reconstruction, it can also vividly and intuitively reproduce the internal scene of the pipeline.

[0003] As a radiation-resistant camera with its own light source, the isolation between the lighting source and the lens becomes increasingly difficult to achieve when the overall size is designed to be very limited. At the same time, the processing technology of related parts also becomes very difficult. When the isolation between the lighting source and the lens is poor, ghosting and light spots will appear in the lens, affecting the camera's recognition of the observed object and causing risks such as misjudgment and missed judgment. If it is used to detect the size and other scenes, it will cause a huge deviation in the detected size. At the same time, because the camera is used in scenes with strong radiation, such as high-energy gamma rays, ordinary glass or translucent materials will brown due to the radiation, the transmittance will drop rapidly, the camera's image will deteriorate, the illumination will drop, and the observed object will not be clearly seen; at the same time, ordinary translucent PC (polycarbonate) and other materials will gradually become brittle and crack due to the influence of radiation, causing the overall performance of the product to drop rapidly. In addition, traditional designs also use light-shielding foam as a light-isolating structural material between the visible light camera and the fill light. Generally, the light-shielding foam is made of EVA (ethylene-vinyl acetate copolymer) and is glued with adhesive backing. The EVA and adhesive backing materials are prone to brittleness under irradiation scenarios, causing isolation failure. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, the first aspect of the present invention provides a double-ring glass for a radiation-resistant camera, the double-ring glass comprising an inner ring glass, an isolation ring and an outer ring glass; wherein: The inner ring glass is connected to the inner circumference of the isolation ring by injection molding as an insert; The outer ring glass is connected to the outer periphery of the isolation ring by a clamping method, and a sealing structure is provided between the outer ring glass and the isolation ring.

[0006] Furthermore, a step is provided on the edge of the inner ring glass to enhance the bonding force between the inner ring glass and the isolation ring.

[0007] Furthermore, a clamping portion is provided on the inner periphery of the outer ring glass, and an undercut structure is provided on the outer periphery of the isolation ring. The clamping portion of the outer ring glass is clamped with the undercut structure of the isolation ring to connect the inner periphery of the outer ring glass with the outer periphery of the isolation ring.

[0008] Furthermore, at least one first protrusion is provided on the isolation ring, and the first protrusion is located on the contact surface between the isolation ring and the outer ring glass, and is used for sealing between the isolation ring and the outer ring glass.

[0009] Furthermore, there are two first protrusions, one of which is used for sealing between the isolation ring and the inner circumference of the outer ring glass, and the other is used for sealing between the isolation ring and the outer end surface of the outer ring glass.

[0010] Furthermore, the inner ring glass is made of radiation-resistant glass; the isolation ring is made of radiation-resistant EPDM rubber or radiation-resistant polycarbonate material; and the outer ring glass is made of radiation-resistant polycarbonate or radiation-resistant silicone rubber material.

[0011] Furthermore, at least one second protrusion is provided on the outer ring glass, and the second protrusion is located on the contact surface between the outer ring glass and the front cover of the camera, and is used for sealing between the outer ring glass and the front cover.

[0012] Furthermore, there are two second protrusions, one of which is located on the outer peripheral surface of the outer ring glass, and the other is located on the outer end surface of the outer ring glass.

[0013] A second aspect of the present invention provides a radiation-resistant camera, comprising the above-mentioned double-ring glass for a radiation-resistant camera.

[0014] Furthermore, the radiation-resistant camera includes: a front cover, a double-ring glass, a lighting board, a lens and a barrel; wherein the front cover and the barrel are threadedly connected, the double-ring glass is pressed and installed by the front cover and the barrel, the lighting board is connected to the barrel, and the lamp beads on the lighting board are evenly distributed on the inner end surface of the outer ring glass.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: The double-ring glass for the radiation-resistant camera provided by the present invention effectively prevents the light source from entering the field of view of the lens through various reflections or refractions; the shading structure is simple, easy to process and assemble; the structure is compact, and the water-repellent and dust-proof effects are significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of the overall structure of the double-ring glass provided in an embodiment of the present invention.

[0018] Figure 2 A cross-sectional schematic diagram of the combination of the inner ring glass and the isolation ring provided in an embodiment of the present invention.

[0019] Figure 3 A schematic cross-sectional view of a double-ring glass structure provided in an embodiment of the present invention.

[0020] Figure 4 A schematic diagram of the main structure of a radiation-resistant tube-type camera provided in an embodiment of the present invention.

[0021] Figure 5 Schematic diagram of the assembly of the double-ring glass, the barrel and the front cover provided in an embodiment of the present invention.

[0022] The accompanying drawings are marked as follows: 1. double-ring glass; 101. inner-ring glass; 1011. step; 102. isolation ring; 1021. inverted structure; 1022. first protrusion; 103. outer-ring glass; 1031. second protrusion; 1032. outer end face of outer-ring glass; 2. front cover; 3. lighting panel; 4. lens; 5. barrel. DETAILED DESCRIPTION

[0023] In order to better understand the above-mentioned technical scheme, the technical scheme of the embodiments of the present application is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical scheme of the embodiments of the present application, rather than limitations on the technical scheme of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments may be combined with each other.

[0024] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0026] See also Figure 1-Figure 5 According to a first aspect of an embodiment of the present invention, a double-ring glass for a radiation-resistant camera is provided, specifically comprising: the double-ring glass 1 comprises an inner ring glass 101, an isolation ring 102 and an outer ring glass 103; wherein, The inner ring glass 101 is connected to the inner circumference of the isolation ring 102 by injection molding as an insert; The outer ring glass 103 is connected to the outer periphery of the isolation ring 102 by means of a clamping connection, and a sealing structure is provided between the outer ring glass 103 and the isolation ring 102 .

[0027] The double-ring glass for radiation-resistant cameras provided by the embodiment of the present invention effectively prevents light sources from entering the field of view of the lens through various reflections or refractions; the shading structure is simple, easy to process and assemble; the waterproof O-ring design of the traditional shading double-ring glass is eliminated, the water-proof and dust-proof effects are significantly improved, and the structure is compact.

[0028] Specifically, in the double-ring glass for radiation-resistant cameras provided by the embodiment of the present invention, the inner ring glass 101 is used as an insert, and the inner ring glass 101 is connected to the inner periphery of the isolation ring 102 by insert injection molding to form an integral structure. This connection method ensures the close connection between the inner ring glass 101 and the isolation ring 102, and improves the overall performance and stability of the double-ring glass product. The outer ring glass 103 is connected to the outer periphery of the isolation ring 102 by a snap-fitting method. The snap-fitting connection method has the advantages of simple and fast installation and high safety. In addition, a sealing structure is provided between the outer ring glass 103 and the outer periphery of the isolation ring 102 to improve the waterproof and dustproof performance between the outer ring glass 103 and the isolation ring 102.

[0029] In a feasible implementation manner, a step 1011 is provided on the edge of the inner ring glass 101 to enhance the bonding force between the inner ring glass 101 and the isolation ring 102 .

[0030] like Figure 2 As shown, the step design on the edge of the inner ring glass 101 is mainly to increase the contact area and friction between the inner ring glass 101 and the isolation ring 102, thereby enhancing the bonding force between the two. Optionally, there are two steps 1011, which are respectively located on the first end face and the second end face of the inner ring glass 101. During the injection molding process of the inner ring glass 101 and the isolation ring 102, the injection material will fill the step 1011 to form a firm interlocking structure, thereby ensuring the tight bonding between the inner ring glass 101 and the isolation ring 102. Specifically, such a structural design has the following advantages: (1) Improve the bonding strength: The step increases the connection surface, making the bonding between the inner ring glass 101 and the isolation ring 102 more firm. (2) Prevent falling off: The concave and convex design of the step can increase the friction. Even when used for a long time or subjected to external forces, the step can effectively prevent the inner ring glass 101 and the isolation ring 102 from falling off.

[0031] In a feasible embodiment, a clamping portion is provided on the inner periphery of the outer ring glass 103, and an inverted structure 1021 is provided on the outer periphery of the isolation ring 102. The clamping portion of the outer ring glass 103 is clamped with the inverted structure 1021 of the isolation ring 102 to connect the inner periphery of the outer ring glass 103 with the outer periphery of the isolation ring 102.

[0032] Furthermore, in order to ensure the sealing effect between the isolation ring 102 and the outer ring glass 103, at least one first protrusion 1022 is provided on the isolation ring 102. The first protrusion 1022 is located on the contact surface between the isolation ring 102 and the outer ring glass 103 and is used for sealing between the isolation ring 102 and the outer ring glass 103.

[0033] like Figure 3 and Figure 5 As shown, a waterproof and dustproof sealing structure is designed on the isolation ring 102. Optionally, two first protrusions 1022 are provided on the isolation ring 102. The first protrusions 1022 can be semicircular protrusions, one of which is used for sealing between the isolation ring 102 and the inner circumference of the outer ring glass 103, and the other is used for sealing between the isolation ring 102 and the outer end surface 1032 of the outer ring glass.

[0034] It is understandable that, since the outer ring glass 103 has a certain elastic deformation ability, after the outer ring glass 103 and the isolation ring 102 are installed in place, the semicircular raised waterproof structure on the isolation ring 102 presses the outer ring glass 103 to ensure the waterproof and dustproof performance between the two.

[0035] In a feasible implementation, the inner ring glass 101 is made of radiation-resistant glass; the isolation ring 102 is made of radiation-resistant EPDM rubber or radiation-resistant polycarbonate material; and the outer ring glass 103 is made of radiation-resistant polycarbonate or radiation-resistant silicone rubber material.

[0036] It is understandable that in order to ensure the shading and radiation resistance effects of the double-ring glass, the components of the double-ring glass are all radiation-resistant materials; among them, the outer ring glass 103 is a radiation-resistant PC (polycarbonate) with high transmittance (light transmittance is not less than 89%) or a radiation-resistant silicone rubber with high transmittance (light transmittance is not less than 89%). The isolation ring 102 is a black elastic radiation-resistant thermoplastic material. Optionally, the isolation ring 102 is a radiation-resistant thermoplastic material such as radiation-resistant EPDM (ethylene propylene diene monomer rubber) or radiation-resistant PC (polycarbonate). The inner ring glass 101 uses radiation-resistant glass with high transmittance (light transmittance is not less than 89%), which will not brown in an irradiated environment and can effectively ensure the clarity of the image. In addition, the radiation-resistant glass has also been post-processed in terms of strength, and its hardness and strength are higher than ordinary glass. It will not break in scenes such as impact, high pressure, and deep water.

[0037] In a feasible implementation, at least one second protrusion 1031 is provided on the outer ring glass 103 . The second protrusion 1031 is located on the contact surface between the outer ring glass 103 and the front cover 2 of the camera and is used for sealing between the outer ring glass 103 and the front cover 2 .

[0038] like Figure 3 and Figure 5 As shown, optionally, the second protrusion 1031 is a semicircular protrusion, and there are two of them, one of which is located on the outer peripheral surface of the outer ring glass 103, and the other is located on the outer end surface 1032 of the outer ring glass. Because the outer ring glass 103 itself has a certain elastic deformation ability, after the front cover 2 and the barrel 5 are tightened by using threads, the deformation of the outer ring glass 103 itself makes the second protrusion 1031 play a sealing role. This design increases the contact area and sealing pressure, thereby improving the reliability and durability of the seal.

[0039] A second aspect of the embodiments of the present invention is as follows: Figure 4 and Figure 5 As shown, a radiation-resistant camera includes a front cover 2, a double-ring glass 1, a lighting board 3 and a lens 4 which are sequentially arranged on a barrel 5; wherein the front cover 2 and the barrel 5 are threadedly connected, the double-ring glass 1 is pressed and installed by the front cover 2 and the barrel 5, the lighting board 3 is connected to the barrel 5, and the lamp beads on the lighting board 3 are evenly distributed on the inner end surface of the outer ring glass 103.

[0040] It is understandable that in nuclear facilities, internal inspection, examination and dredging of radioactive material pipelines are important links in ensuring nuclear safety. Tubular radiation-resistant cameras are needed to observe and capture video of the inside of the pipeline in real time so that appropriate measures can be taken. In order to ensure that the image is clear and accurate when the tubular radiation-resistant camera captures the video inside the radioactive pipeline, a good radiation-resistant shading structure (double-ring glass) is required between the camera light source and the lens. Figure 1-Figure 5 The structure of the radiation-resistant camera is described.

[0041] The shading design of the double-ring glass 1 includes: the inner ring glass 101 adopts high-transmittance radiation-resistant glass, which will not brown in the radiation environment and can effectively ensure the clarity of the image. The radiation-resistant glass has also been post-processed in terms of strength, and its hardness and strength are higher than ordinary glass. It will not break in scenes such as impact, high pressure, and deep water. The isolation ring 102 is a black elastic radiation-resistant thermoplastic material. The inner ring glass 101 is processed into a whole with the isolation ring 102 by insert injection molding. The outer ring glass 103 adopts high-transmittance radiation-resistant polycarbonate or high-transmittance radiation-resistant silicone rubber.

[0042] The waterproof design of the double-ring glass 1 includes: the outer ring glass 103 is made of highly transparent and radiation-resistant silicone rubber or polycarbonate injection molding, and has good radiation resistance. The outer ring glass 103 and the isolation ring 102 are fixed by a snap connection. The isolation ring 102 is designed with an undercut structure. The outer ring glass 103 is pressed into the isolation ring 102 by external force to ensure a tight connection between the outer ring glass 103 and the isolation ring 102, and will not be separated due to external pressure. A waterproof structure is designed on the isolation ring 102. Because the outer ring glass 103 is made of silicone rubber, it has a certain elastic deformation ability. After being installed in place, the semicircular waterproof structure on the isolation ring 102 presses the outer ring glass 103 to ensure the waterproof performance between the two. The outer side of the outer ring glass 103 is also designed with a semicircular raised waterproof structure. Because the outer ring glass 103 is made of silicone rubber or polycarbonate, it has a certain elastic deformation ability. After the front cover 2 and the barrel 5 are tightened with threads, its own deformation plays a sealing role.

[0043] The main structure of the radiation-resistant camera: the double-ring glass 1 is installed by pressing the front cover 2 and the barrel 5, and the front cover 2 and the barrel 5 are connected by threads. This connection method is not only stable and reliable, but also easy to disassemble and maintain. The lighting board 3 is installed on the barrel 5, and the lamp beads on the lighting board 3 are evenly distributed around the outer ring glass 103 of the double-ring glass 1, which is used for lighting when the ambient illumination is low.

[0044] In summary, the double-ring glass can fully meet the sealing requirements in the radiation environment through the shading design, waterproof design and the structure of the camera body. Compared with the traditional shading double-ring glass, it has the following beneficial effects: (1) effectively prevent the light source from entering the field of view of the lens through various reflections or refractions; (2) the shading structure is simple and easy to process and assemble; (3) the water-proof and dust-proof effect is significantly improved, the conventional waterproof O-ring design is eliminated, and the structure is compact; (4) the components are all made of radiation-resistant materials, with high light transmittance and greatly improved radiation resistance.

[0045] It is understandable that the latter part of the radiation-resistant camera, including the sensor, mainboard and other components, will not be elaborated here.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0047] In view of the above detailed description, these and other changes can be made to these embodiments, and this written description includes the best mode embodiments to disclose the present invention. The scope of the patent obtained by the present invention is defined by the claims, which are not limited by the present disclosure, and the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field within the scope disclosed by the present invention, according to the technical solution and its conception of the present invention, is equivalent to or changes, and all are within the protection scope of the present invention.

Claims

1. A double ring glass for a radiation resistant camera, characterized in that: The double-ring glass (1) comprises an inner ring glass (101), an isolation ring (102) and an outer ring glass (103); wherein: The inner ring glass (101) is connected to the inner circumference of the isolation ring (102) by injection molding as an insert; The outer ring glass (103) is connected to the outer periphery of the isolation ring (102) by means of a clamping connection, and a sealing structure is provided between the outer ring glass (103) and the isolation ring (102).

2. The double ring glass for radiation resistant cameras according to claim 1, characterized in that: The edge of the inner ring glass (101) is provided with a step, which is used to enhance the bonding force between the inner ring glass (101) and the isolation ring (102).

3. The double ring glass for radiation resistant camera according to claim 1, characterized in that: The inner periphery of the outer ring glass (103) is provided with a clamping portion, and the outer periphery of the isolation ring (102) is provided with an undercut structure (1021); the clamping portion of the outer ring glass (103) and the undercut structure (1021) of the isolation ring (102) are clamped together so that the inner periphery of the outer ring glass (103) is connected to the outer periphery of the isolation ring (102).

4. The double ring glass for radiation resistant camera according to claim 3, characterized in that: At least one first protrusion (1022) is provided on the isolation ring (102); the first protrusion (1022) is located on the contact surface between the isolation ring (102) and the outer ring glass (103), and is used for sealing between the isolation ring (102) and the outer ring glass (103).

5. The double ring glass for radiation resistant camera according to claim 4, characterized in that: There are two first protrusions (1022), one of which is used for sealing between the isolation ring (102) and the inner circumferential surface of the outer ring glass (103), and the other is used for sealing between the isolation ring (102) and the outer end surface of the outer ring glass (103).

6. The double ring glass for radiation resistant cameras according to any one of claims 1 to 5, characterized in that: The inner ring glass (101) is made of radiation-resistant glass; The isolation ring (102) is made of radiation-resistant EPDM rubber or radiation-resistant polycarbonate material; The outer ring glass (103) is made of radiation-resistant polycarbonate or radiation-resistant silicone rubber material.

7. The double ring glass for radiation resistant camera according to claim 6, characterized in that: At least one second protrusion (1031) is provided on the outer ring glass (103); the second protrusion (1031) is located on the contact surface between the outer ring glass (103) and the front cover (2) of the camera, and is used for sealing between the outer ring glass (103) and the front cover (2).

8. The double ring glass for radiation resistant camera according to claim 7, characterized in that: There are two second protrusions (1031), one of which is located on the outer peripheral surface of the outer ring glass (103), and the other is located on the outer end surface of the outer ring glass (103).

9. A radiation-resistant camera, characterized in that: The invention comprises the double-ring glass for radiation-resistant cameras as described in any one of claims 1 to 8.

10. The radiation resistant camera according to claim 9, characterized in that: The radiation-resistant camera comprises: a front cover (2), a double-ring glass (1), a lighting panel (3), a lens (4) and a barrel (5); The front cover (2) and the barrel (5) are threadedly connected, the double-ring glass (1) is pressed and installed by the front cover (2) and the barrel (5), the lighting lamp board (3) is connected to the barrel (5), and the lamp beads on the lighting lamp board (3) are evenly distributed on the inner end surface of the outer ring glass (103).

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