An explosion-proof industrial camera

Abstract

An explosion-proof industrial camera comprises a camera explosion-proof shell with a window glass, a lens device arranged in the camera explosion-proof shell in an explosion-proof manner, and a camera support, the camera explosion-proof shell is arranged on the camera support in a sliding manner along the optical axis direction of the lens device, and a displacement control mechanism for controlling the movement of the camera explosion-proof shell relative to the camera support is arranged on the camera support. The explosion-proof industrial camera is convenient to install, after the camera support is installed, the lens device can be controlled to move in the optical axis direction to a more suitable position through the displacement control mechanism, the installation error of the camera support is compensated, accurate focusing is achieved, and a clear picture is quickly obtained. When the measured object changes in industrial detection, the height or thickness of the measured object changes greatly, small displacement along the optical axis can be used for refocusing, and the camera explosion-proof shell is opened to adjust the lens position and other operations, the explosion-proof performance is high, the operation is safer, and the operation is time-saving and labor-saving.

Description

Technical Field

[0001] This utility model belongs to the field of explosion protection, specifically relating to an explosion-proof industrial camera. Background Technology

[0002] Electrical equipment used in environments with explosive gases, dust, and fibers (such as coal mines, petrochemical plants, gas stations, natural gas extraction, drilling platforms, military industries, mines, and metal polishing workshops with explosive hazards) requires explosion-proof design. Otherwise, electrical sparks, arcs, or other electrical ignition sources generated by accidental equipment operation may lead to explosions and safety accidents.

[0003] In existing explosion-proof industrial cameras, the lens assembly is fixed in position relative to the bracket. In actual use, after the explosion-proof industrial camera is fixedly installed, the object distance of the lens is fixed and focusing is not possible. Once there is a large change in the height / thickness of the object being measured, it is easy to cause defocusing, blurring, and loss of details, resulting in dimensional errors and missed defects.

[0004] Therefore, there is a market demand for an explosion-proof industrial camera that is highly explosion-proof and whose lens can move along the optical axis to focus, thus providing clearer images for taking pictures, recording videos, and making measurements. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an explosion-proof industrial camera.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an explosion-proof industrial camera, including a camera explosion-proof housing with a viewing window, a lens device disposed inside the camera explosion-proof housing, and a camera bracket. The camera explosion-proof housing is slidably disposed on the camera bracket along the optical axis of the lens device. The camera bracket is provided with a displacement control mechanism for controlling the movement of the camera explosion-proof housing relative to the camera bracket.

[0007] In some embodiments, at least one of the camera explosion-proof housing and the camera bracket is provided with a guide rod, and the other of the two has a guide hole, the guide rod being slidably inserted into the guide hole.

[0008] In some embodiments, the displacement control mechanism includes a screw with one end rotatably mounted on the camera explosion-proof housing and a threaded hole formed on the camera bracket. The screw is threadedly inserted into the threaded hole, and a drive unit is fixed to the other end of the screw.

[0009] In some embodiments, the drive unit is a hand crank or a drive gear.

[0010] In some embodiments, the camera bracket includes an annular frame with an annular hole, a fixed base, and a side bracket fixedly connected between the edge of the annular frame and the edge of the fixed base. A camera housing space is formed between the annular frame, the fixed base, and the side bracket. The camera explosion-proof housing is located within the camera housing space. The viewing window is directly opposite the annular hole, and the optical axis of the lens assembly coincides with the center line of the annular frame.

[0011] In some embodiments, the displacement control mechanism is disposed between the fixed chassis and the assembly tailstock at the rear of the camera explosion-proof housing.

[0012] In some embodiments, the annular frame has an annular explosion-proof cavity, and a light source is installed inside the annular explosion-proof cavity.

[0013] In some embodiments, the annular frame includes an annular shell connecting the side support, an annular cover disposed on the annular shell, and a light source glass being installed on the annular cover in an explosion-proof manner.

[0014] In some embodiments, the viewing window is parallel to the light source glass.

[0015] The scope of this utility model is not limited to technical solutions formed by specific combinations of the above-mentioned technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-mentioned technical features or their equivalent features. For example, technical solutions formed by substituting the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

[0016] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: After the lens device of this utility model is explosion-proof and encapsulated, it is installed on the camera bracket and can be moved and adjusted relative to the camera bracket along the optical axis by the displacement control mechanism. First, it is easy to install. After the camera bracket is installed, the lens device can be moved and adjusted to a more suitable position in the optical axis direction by the displacement control mechanism to compensate for the installation error of the camera bracket, achieve precise focus, and quickly achieve clear images. Second, when the object being tested changes during industrial testing, such as a significant change in the height or thickness of the object, a small displacement along the optical axis is sufficient to refocus, avoiding disassembly, opening the camera explosion-proof shell, adjusting the lens position, etc. It has high explosion-proof performance, is safer to operate, and saves time and effort. Attached Figure Description

[0017] Figure 1 A three-dimensional schematic diagram of an explosion-proof industrial camera; Figure 2 A side view of an explosion-proof industrial camera; Figure 3 For the appendix Figure 2 K-direction diagram; Figure 4 This is a central cross-sectional view of an explosion-proof industrial camera; in: 1. Camera explosion-proof housing; 11. Viewing window glass; 12. Camera explosion-proof front cover; 13. Camera explosion-proof main housing; 14. Assembly tailpiece; 15. Guide rod; 2. Lens assembly; 3. Camera bracket; 31. Fixed base; 32. Side bracket; 33. Annular frame; 331. Annular shell frame; 332. Annular cover; 333. Light source glass; 334. Annular explosion-proof cavity; 34. Guide hole; 4. Displacement control mechanism; 41. Screw; 42. Threaded hole; 43. Drive unit; 44. Bearing; 5. Light source. Detailed Implementation

[0018] As shown in the accompanying drawings, an explosion-proof industrial camera includes an explosion-proof housing 1 with a viewing window 11, a lens assembly 2 disposed within the explosion-proof housing 1, and a camera bracket 3. The explosion-proof housing 1 is slidably mounted on the camera bracket 3 along the optical axis of the lens assembly 2. The camera bracket 3 is equipped with a displacement control mechanism 4 for controlling the movement of the explosion-proof housing 1 relative to the camera bracket 3. The detailed structure is as follows: As attached Figure 1 , 2 As shown, the camera bracket 3 includes an annular frame 33 with an annular hole, a fixed base 31 that can be mounted and fixed to the equipment, and a side bracket 32 ​​fixedly connected between the side of the annular frame 33 and the side of the fixed base 31. A camera receiving space is formed between the annular frame 33, the fixed base 31 and the side bracket 32.

[0019] As attached Figure 3 , 4 As shown, the camera explosion-proof housing 1 includes a camera explosion-proof main housing 13 and a camera explosion-proof front cover 12 fixed to the front opening of the camera explosion-proof main housing 13. A viewing window 11 is installed on the camera explosion-proof front cover 12, and a lens assembly 2 is fixed inside the camera explosion-proof main housing 13, with the lens facing the viewing window 11. The camera explosion-proof housing 1, which houses the lens assembly 2, is located within the camera receiving space of the camera bracket 3. The viewing window 11 faces the annular hole, and the optical axis of the lens assembly 2 coincides with the center line of the annular bracket 33.

[0020] The rear of the camera explosion-proof main housing 13 is fixedly mounted with a mounting tailstock 14 by screws. Three parallel guide rods 15 extending rearward are fixed to the mounting tailstock 14. The mounting base 31 of the camera bracket 3 has three guide holes 34, and each guide rod 15 is inserted into the corresponding guide hole 34. This ensures that the camera explosion-proof housing 1 can only move relative to the camera bracket 3 along the centerline of the ring frame 33.

[0021] Regarding displacement control mechanism 4: As attached Figure 1 , 2 As shown in Figure 4, the displacement control mechanism 4 includes a screw 41, one end of which is rotatably mounted on the mounting tailstock 14 of the camera explosion-proof housing 1 via a bearing, and a threaded hole 42 opened in the center of the fixed base 31 of the camera bracket 3. The centerline of the screw 41 and the centerline of the threaded hole 42 coincide with the optical axis of the lens device 2. The screw 41 is threaded into the threaded hole 42, and a drive unit 43 is fixed to the other end of the screw 41. The drive unit 43 can be a hand crank as in this embodiment. When the operator is adjusting, they can shake the hand crank to rotate the screw 41, and the screw 41 moves in the threaded hole 42 of the camera bracket 3, thereby driving the camera explosion-proof housing 1 to move synchronously relative to the camera bracket 3 along the centerline direction. After installing the camera bracket, the lens assembly 2 can be moved and adjusted to a more suitable position along the optical axis by holding and cranking the hand crank. This compensates for installation errors of the camera bracket, ensures precise focusing, and quickly achieves a clear image. Secondly, when the object being tested changes during industrial inspection, such as significant changes in its height or thickness, the lens assembly 2 can also be slightly displaced along the optical axis by holding and cranking the hand crank. This avoids disassembly, opening the camera's explosion-proof housing, and adjusting the lens position. It offers high explosion-proof performance, safer operation, and saves time and effort.

[0022] Without illustration, the drive unit can also be a drive gear, which is controlled by a servo motor, a reducer, and a gear set. The gear set meshes with the drive gear to control the movement of the screw 41 within the threaded hole 42 of the camera bracket 3.

[0023] In this embodiment, the ring frame 33 is not only part of the camera bracket 3, but also a light source bracket. (See attached image) Figure 3 , 4 As shown, the annular frame 33 includes an annular shell 331 connected to the side support 32 and an annular cover 332 mounted on the annular shell 331. A light source glass 333 is installed on the annular cover 332 in an explosion-proof manner. An annular explosion-proof cavity 334 is formed between the annular shell 331 and the annular cover 332, and a light source 5 is installed inside the annular explosion-proof cavity 334. The annular light source 5 coincides with the center of the lens device 2. During the shooting process of the lens device 2, the light shines symmetrically and in a near-normal incidence manner, which can form high-intensity bright field illumination within the lens field of view, effectively reducing shadows and highlights caused by unilateral lighting, improving the overall illumination uniformity, and making the image clearer and more stable.

[0024] The viewing window glass 11 is parallel to the light source glass 333.

[0025] An explosion-proof cable glands are installed on the annular housing 331 and the explosion-proof main housing 13 of the camera, respectively.

[0026] In this embodiment, both the lens assembly 2 and the ring light source 5 are explosion-proof encapsulated, and the product meets the explosion-proof rating of Ex db IIB and the protection rating of IP66. It is safe to use, easy to operate, and produces clear images.

[0027] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An explosion-proof industrial camera, comprising an explosion-proof housing (1) with a viewing window (11) and a lens assembly (2) disposed within the explosion-proof housing (1), characterized in that: It also includes a camera bracket (3), the camera explosion-proof shell (1) is slidably mounted on the camera bracket (3) along the optical axis of the lens device (2), and the camera bracket (3) is provided with a displacement control mechanism (4) for controlling the movement of the camera explosion-proof shell (1) relative to the camera bracket (3).

2. The explosion-proof industrial camera according to claim 1, characterized in that: At least one guide rod (15) is provided on one of the camera explosion-proof housing (1) and the camera bracket (3), and the other one has a guide hole (34). The guide rod (15) can be slidably inserted into the guide hole (34).

3. The explosion-proof industrial camera according to claim 1, characterized in that: The displacement control mechanism (4) includes a screw (41) rotatably mounted on the camera explosion-proof housing (1) at one end and a threaded hole (42) opened on the camera bracket (3). The screw (41) is threadedly inserted into the threaded hole (42), and a drive unit (43) is fixed at the other end of the screw (41).

4. The explosion-proof industrial camera according to claim 3, characterized in that: The drive unit (43) is a hand crank or a drive gear.

5. The explosion-proof industrial camera according to claim 1, characterized in that: The camera bracket (3) includes an annular frame (33) with an annular hole, a fixed base (31), and a side bracket (32) fixedly connected between the side of the annular frame (33) and the side of the fixed base (31). A camera housing space is formed between the annular frame (33), the fixed base (31), and the side bracket (32). The camera explosion-proof shell (1) is located in the camera housing space. The viewing window glass (11) faces the annular hole. The optical axis of the lens device (2) coincides with the center line of the annular frame (33).

6. The explosion-proof industrial camera according to claim 5, characterized in that: The displacement control mechanism (4) is located between the fixed chassis (31) and the assembly tail frame (14) at the rear of the camera explosion-proof shell (1).

7. An explosion-proof industrial camera according to claim 5, characterized in that: The annular frame (33) has an annular explosion-proof cavity (334), and a light source (5) is installed in the annular explosion-proof cavity (334).

8. An explosion-proof industrial camera according to claim 7, characterized in that: The annular frame (33) includes an annular shell (331) connected to the side support (32) and an annular cover (332) installed on the annular shell (331) with explosion-proof mounting cover. A light source glass (333) is installed on the annular cover (332) with explosion protection.

9. An explosion-proof industrial camera according to claim 8, characterized in that: The viewing window glass (11) is parallel to the light source glass (333).

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