A general-purpose testing device for barrels

Abstract

This utility model discloses a universal barrel testing device, including a testing lens, a lens frame, multiple rods, a support chuck, a tail rod, and a display device. The testing lens is installed inside the lens frame, and the rods and tail rod are connected sequentially to form an adjustable-length testing rod body. The rods are connected by a quick-connect structure. The support chuck is detachably installed between adjacent rods and has various diameter specifications to adapt to barrels of different diameters and to provide centering support and limiting during testing. The outer wall of the rod has length scale lines, and the rod body is a hollow structure to accommodate signal cables. The cables are connected to the display device to achieve real-time display of images or videos. This utility model has strong structural versatility, can be flexibly adjusted according to different barrel diameters and lengths, has high testing stability, is easy to assemble and disassemble quickly, and has a comprehensive testing range, suitable for internal testing of various types of gun barrels.

Description

Technical Field

[0001] This utility model relates to the field of machinery, specifically to a general-purpose testing device for bores. Background Technology

[0002] Muzzle inspection is an essential part of the production, use, and maintenance of firearms, artillery, and other weapons with tubular firing mechanisms. Its main task is to determine whether there are cracks, rust, carbon buildup, wear, or other defects inside the barrel that could affect firing safety and accuracy. To achieve this, it is usually necessary to use inspection equipment to insert observation or imaging components into the barrel to obtain clear internal images.

[0003] Existing rifling inspection equipment is mostly a combination of a fixed-length inspection rod and an imaging component, which has poor versatility. When it is necessary to inspect rifling tubes of different diameters and lengths, it is often necessary to replace the entire set of equipment or use temporary transition parts for adaptation. This not only increases the number of equipment and the burden of carrying it, but also reduces the efficiency of on-site operation.

[0004] Furthermore, traditional inspection equipment lacks effective central support and limiting structures, causing the imaging components to easily deviate from the bore axis during inspection, resulting in shaking or eccentricity, which affects image stability and inspection accuracy. If the equipment shakes during use, it may also miss small, localized defects, reducing the reliability of the inspection.

[0005] In terms of detection angle, existing equipment is mostly based on direct viewing. When it is necessary to observe a local or specific angle position of the inner wall of the barrel, it is often necessary to disassemble or readjust the optical structure of the equipment. Switching between direct and side views is inconvenient, which affects the continuity and efficiency of the detection.

[0006] In addition, some existing equipment has complex structures and cumbersome operations in terms of rod connection. On-site replacement or length adjustment takes a long time, and the connection reliability is insufficient. It is easy to loosen during use, which affects the continuity of testing.

[0007] In summary, existing technologies generally suffer from the following problems:

[0008] It lacks versatility and cannot be quickly adapted to different diameters and lengths of bores.

[0009] Poor positioning and stability, and the lack of effective centering support and limiting structure, make the imaging components prone to swaying.

[0010] The limited inspection angle makes it inconvenient to switch between direct and side views, making it difficult to fully observe the details inside the bore.

[0011] The connection process is cumbersome, the assembly and disassembly of the rods are time-consuming, and loosening is a common problem. Summary of the Invention

[0012] To solve the above-mentioned technical problems, this utility model provides a universal testing device for bores.

[0013] This utility model is achieved through the following technical solution:

[0014] This utility model discloses a universal testing device for bores, comprising:

[0015] Inspection lens, used to acquire images or videos of the inside of the barrel;

[0016] A lens frame, in which the detection lens is mounted, and the lens frame is provided with a support structure for limiting and protecting the detection lens.

[0017] Multiple rods, one end of which can be connected to the lens frame mentioned above, and the other end can be quickly connected to the tail rod or another rod, for use individually or for sequential assembly from head to tail;

[0018] A support chuck is detachably mounted between the two aforementioned rods and has different diameter specifications to accommodate different diameter bores and to support and position the aforementioned rods during testing.

[0019] The tail rod is connected to the end of the above-mentioned rods or multiple rods after assembly;

[0020] The display device is connected to the detection lens via a cable and is used to display images or videos of the inside of the bore tube collected by the detection lens in real time.

[0021] The aforementioned equipment can be adapted to various diameter bores by replacing the support chucks of different diameters, and the number and total length of the aforementioned rods can be adjusted according to testing requirements.

[0022] The inspection lens is the core sensing unit of the entire inspection system. Its built-in high-resolution imaging components enable it to clearly capture details inside the barrel even in low-light conditions, ensuring accurate identification of defects such as cracks, carbon buildup, and wear. The lens frame not only secures the lens but also, through a well-designed support structure, prevents it from wobbling after insertion into the barrel, thus avoiding image distortion. The modular design of multiple rods gives the device high scalability and adaptability, allowing for rapid assembly or disassembly to meet the length requirements of different firearms and cannon barrels. The support chuck provides multi-point support during inspection, ensuring the rods remain centered and stable inside the barrel, reducing image jitter caused by rod swaying. The tail rod serves as a grip and also facilitates connection to other external equipment or provides force support. The real-time display function of the display device allows operators to make immediate judgments without removing the equipment, improving inspection efficiency.

[0023] Furthermore, the aforementioned lens frame includes a head plate and a tail plate, which are arranged coaxially and are fixedly connected by several vertically arranged connecting rods to form a cylindrical structure; the head plate has a lens connecting seat in the middle, which is detachably and fixedly connected to the aforementioned detection lens; the tail plate has a rod connecting member, which is detachably connected to one end of the aforementioned rod member.

[0024] The coaxial arrangement of the head and tail plates ensures the overall axial accuracy of the lens frame, allowing the inspection lens to be precisely aligned with the bore axis when entering the bore. Connecting rods provide connection and support, forming a stable cylindrical frame. This structure can withstand external forces while providing space for internal wiring or light source placement. The detachable design of the lens mount facilitates the replacement of different types or focal lengths of inspection lenses, adapting to various inspection tasks. The rod connectors on the tail plate allow for quick assembly and disassembly of the rods, facilitating rapid on-site adjustments to the length of the inspection equipment or component replacement.

[0025] Furthermore, the aforementioned rod includes a rod body, which is a hollow rod-shaped member; one end of the rod body is configured as a plug-in part, and the other end is configured as a receiving part;

[0026] The aforementioned connector can be inserted into the receiving part of another rod or into the tail rod;

[0027] The aforementioned connecting part can be connected to another rod or to the lens frame;

[0028] The outer diameter of the aforementioned insertion part is smaller than the inner diameter of the receiving part. A spring plunger is provided on the circumferential surface of the aforementioned insertion part, and a limiting hole is provided on the circumferential surface of the aforementioned receiving part. When the insertion part of another rod is inserted into the receiving part of the rod, the spring plunger is engaged in the limiting hole. Two disc positioning protrusions are provided on the end face of the aforementioned receiving part. When the support chuck is installed between the two aforementioned rods, the two disc positioning protrusions are engaged in the preset notches of the support chuck, thus completing the limiting of the support chuck.

[0029] The hollow design of the rod body not only reduces the weight of the equipment but also provides a channel for the installation of signal cables and coils, making the internal wiring neater. The fit between the plug and the receiving part achieves a quick and reliable connection through dimensional difference and the elastic locking of the spring plunger, avoiding the cumbersome operation required by traditional threaded connections. The interaction between the limiting hole and the spring plunger ensures that the assembled rod will not loosen due to vibration or pushing and pulling. The disc positioning protrusion provides accurate installation positioning for the support chuck, preventing the support chuck from rotating or shifting during use, thereby maintaining the stability of the rod in the barrel.

[0030] Furthermore, the aforementioned support chuck includes a chuck body with different diameter specifications; a chuck positioning hole is provided at the center of the chuck body; the diameter of the chuck positioning hole is larger than the outer diameter of the insertion part and smaller than the outer diameter of the receiving part; a notch corresponding to the chuck positioning protrusion is provided at the edge of the chuck positioning hole.

[0031] Different diameter specifications of the disc body can be adapted to different diameter bores by changing different models, ensuring that the rod remains centered during testing. The size design of the disc positioning hole ensures that the support chuck can be smoothly inserted into the installation position of the rod without causing significant wobbling. The fit between the notch and the disc positioning protrusion allows the support chuck to be precisely positioned and prevents rotation.

[0032] Furthermore, the tail rod includes a tail rod portion with the same structure as the receiving portion of the rod, and the tail rod portion is fitted with an anti-slip sleeve.

[0033] As the end component of the rod assembly, the tailstock not only ensures the integrity of the assembly but also provides the operator with a comfortable and non-slip grip. The non-slip grip is typically made of materials with elasticity and friction, such as rubber or thermoplastic elastomers, to maintain a stable grip even during prolonged operation or when hands are oily. Furthermore, the tailstock's receptacle structure is consistent with other rod components, facilitating interchangeability and extension.

[0034] Furthermore, the aforementioned detection lens is a wide-angle lens. Wide-angle lenses can capture a larger area of ​​the inside of the barrel within a limited viewing distance, which is particularly useful for detecting long barrels, reducing the need for repositioning equipment and improving detection efficiency.

[0035] Furthermore, the aforementioned display device is a handheld monitor, a desktop monitor, a smartphone, or a small computer; the cable connecting the aforementioned display device to the aforementioned detection lens is externally fitted with a snake tube, which passes through the cavity of several rods, so that both ends of the cable are connected to the display device and the detection lens.

[0036] The diverse range of display device types allows for adaptability to different application scenarios. For example, handheld displays are suitable for rapid field testing, desktop displays are suitable for laboratory analysis, and smartphones facilitate data storage and remote transmission. The sheath of the flexible cable protects the cable from damage caused by pulling, friction, and bending, while allowing it to pass smoothly through the cavities of the rod without jamming, maintaining the stability of signal transmission.

[0037] Furthermore, a side mirror is detachably connected to the side of the lens mount that is not connected to the inspection lens, for reflecting the image of the inner wall of the bore. The use of the side mirror allows the inspection lens to observe the lateral or inclined portions of the inner wall of the bore without changing its axial position, which is particularly important when inspecting threads or internal wall cracks. The detachable design allows users to flexibly install or remove the side mirror as needed without affecting the use of the direct-view inspection mode.

[0038] Furthermore, the aforementioned side mirror includes a connecting ring coaxially connected to the lens mounting base; the connecting ring is fixedly connected to the lens mount, and a reflector is fixedly connected to the lens mount; the reflector forms a 45-degree angle with the central axis of the detection lens.

[0039] The connecting ring ensures precise coaxiality between the side mirror and the lens mount, enabling the reflector's optical path to accurately guide the image from the inner wall of the bore to the inspection lens. The 45-degree angle between the reflector and the central axis is a common design angle for optical reflection imaging, efficiently converting lateral images to a forward imaging direction while maintaining image quality. The robust design of the mount reduces mirror vibration during use, ensuring image stability.

[0040] Furthermore, the aforementioned detection lens is equipped with a lighting device, which includes a ring-shaped LED light and is arranged circumferentially at the front end of the detection lens; length scale lines are provided on the outer wall of the aforementioned rod.

[0041] The circumferential arrangement of the ring-shaped LEDs creates uniform illumination inside the bore, avoiding shadows and reflections caused by a single-sided light source, resulting in clear, blind-spot-free images. The LEDs have low power consumption and long lifespan, making them suitable for extended use. The length markings on the rod provide the operator with a real-time reference for insertion depth, facilitating accurate positioning of the detection location. This is particularly important when repeated testing or comparative analysis of specific locations is required; the markings significantly improve operational repeatability.

[0042] The beneficial effects of this utility model are as follows:

[0043] The interchangeable support chuck enables rapid adaptation to multiple bore diameters, reducing the types of equipment and improving versatility.

[0044] The modular rod structure allows for flexible adjustment of the total testing length to adapt to different barrel length requirements.

[0045] The cooperation between the support chuck and the positioning structure ensures that the imaging components remain coaxially centered within the bore, significantly improving detection stability and accuracy.

[0046] The detachable side mirror structure enables rapid switching between direct and side views, improving the detection range coverage and the ability to observe details.

[0047] The quick-connect rod interface design simplifies assembly and disassembly operations, improving efficiency and reliability in the field.

[0048] The outer wall length scale marks facilitate precise control of the detection depth, improving the accuracy of repeatable positioning and the comparability of detection results. Attached Figure Description

[0049] Figure 1 : A three-dimensional structural schematic diagram of this utility model;

[0050] Figure 2 : A three-dimensional structural diagram of the lens frame, rod, and display device of this utility model;

[0051] Figure 3 : A three-dimensional structural diagram of the rod component of this utility model;

[0052] Figure 4 Another three-dimensional structural diagram of the rod component of this utility model;

[0053] Figure 5 : A three-dimensional structural diagram of the chuck supporting this utility model;

[0054] Figure 6 : A three-dimensional structural diagram of the tail rod of this utility model;

[0055] Figure 7 : A three-dimensional structural diagram of the side mirror of this utility model;

[0056] In the diagram: 1-Detection lens, 2-Lens frame, 3-Rod, 4-Support chuck, 5-Tail rod, 6-Display device, 7-Side mirror, 21-Head plate, 22-Connecting rod, 23-Tail plate, 24-Lens connector, 25-Rod connector, 31-Rod body, 32-Plug-in part, 33-Receiving part, 34-Limiting hole, 35-Plate positioning protrusion, 41-Plate body, 42-Plate positioning hole, 43-Ventilation groove, 71-Connecting ring, 72-Lens mount, 73-Reflector. Detailed Implementation

[0057] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings and specific structures. It should be understood that these embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model.

[0058] Example: Figures 1-7 As shown, a general-purpose bore testing device includes: a testing lens 1, a lens frame 2, multiple rods 3, a support chuck 4, a tail rod 5, and a display device 6.

[0059] The inspection lens 1 is a high-resolution imaging component capable of acquiring high-definition images or videos of the interior of the bore in low-light environments. The inspection lens 1 preferably employs a wide-angle lens structure to cover a larger observation range within a limited viewing distance, reducing the frequency of equipment movement. A ring of LEDs is evenly arranged circumferentially at the front end of the inspection lens 1 to provide uniform illumination to the interior of the bore, eliminating shadows and reflections and improving image quality.

[0060] The lens frame 2 is used to mount and fix the inspection lens 1. It includes a head plate 21 and a tail plate 23, which are coaxially arranged and fixedly connected by several vertically distributed connecting rods 22 to form a cylindrical support structure. A lens connecting seat 24 is provided in the middle of the head plate 21, which is detachably and fixedly connected to the inspection lens 1, facilitating the replacement of different types of inspection lenses 1 or mounting accessories. A rod connector 25 is provided on the tail plate 23 for quick assembly with one end of a rod 3. The lens frame 2 as a whole ensures that the inspection lens 1 is precisely aligned with the bore axis when entering the bore, thereby obtaining a non-skewed imaging effect.

[0061] Multiple rods 3 can be freely assembled or disassembled according to testing requirements. Each rod 3 includes a hollow rod body 31, with a plug-in part 32 at one end and a receiving part 33 at the other end. The outer diameter of the plug-in part 32 is smaller than the inner diameter of the receiving part 33, and a spring plunger is provided on its circumferential surface. A limiting hole 34 is provided on the circumferential surface of the receiving part 33. When the plug-in part 32 is inserted into the receiving part 33 of another rod 3, the spring plunger automatically engages with the limiting hole 34, achieving a quick and stable connection without the need for additional fasteners. Two disc positioning protrusions 35 are provided on the end face of the receiving part 33. When a support chuck 4 is installed between two rods 3, the disc positioning protrusions 35 engage with the notches on the support chuck 4, achieving accurate positioning of the support chuck 4.

[0062] The support chuck 4 is used to support and position the rod 3 during the inspection process. Its body 41 can be made in different diameters to fit different diameter bores. The center of the body 41 has a chuck positioning hole 42, the diameter of which is larger than the outer diameter of the insertion part 32 and smaller than the outer diameter of the receiving part 33, so as to fit into the installation position and form a radial limit. The notch at the edge of the chuck positioning hole 42 cooperates with the chuck positioning protrusion 35 to prevent the support chuck 4 from rotating or shifting during use, and to ensure that the inspection lens 1 remains coaxial and stable inside the bore.

[0063] The tail rod 5 has the same structure as the receiving part 33 of the rod 3, and is fitted with an anti-slip sleeve on the outside to facilitate the operator's grip and push of the equipment into or out of the barrel. The anti-slip sleeve is preferably made of rubber or thermoplastic elastomer to enhance grip comfort and operational stability.

[0064] Display device 6 can be a handheld monitor, desktop monitor, smartphone, or small computer, and is connected to the detection lens 1 via a cable. A flexible tube is sleeved around the cable, passing through the cavity of the rod 3. This protects the cable from pulling and friction, and facilitates quick assembly and disassembly. Display device 6 allows real-time viewing of the internal images or videos transmitted from the detection lens 1, enabling immediate judgment.

[0065] Furthermore, when it is necessary to observe the lateral or inclined parts of the inner wall of the barrel, a side mirror 7 can be installed on the side of the lens connector 24 that is not connected to the detection lens 1. The side mirror 7 includes a connecting ring 71, a mirror base 72, and a reflector 73 that forms a 45-degree angle with the central axis of the detection lens 1. It uses the principle of reflection imaging to turn the image of the inner wall of the barrel to the imaging direction of the detection lens 1, so as to achieve side-view inspection without changing the axial position.

[0066] To assist in operation, length scale lines are engraved on the outer wall of rod 3, which makes it easier for the operator to accurately control the insertion depth during the inspection process, ensuring positioning consistency and repeatability.

[0067] Working process and principle

[0068] In use, the operator first selects a support chuck 4 of appropriate diameter according to the bore diameter of the barrel to be tested, and assembles the required number of rods 3 according to the length of the barrel. The testing lens 1 is connected to the first rod 3 through the lens frame 2, and a tail rod 5 is installed at the rear as the operating end. The support chuck 4 is installed between two rods 3 in a suitable position to ensure that the entire rod assembly can be centered and stable after entering the barrel.

[0069] The cable passes through the inside of the rod 3 via a serpentine tube and connects to the detection lens 1 and the display device 6 respectively. Upon power-up, the ring-shaped LED light illuminates, providing uniform illumination inside the bore. The detection lens 1 transmits the acquired images or video signals from inside the bore to the display device 6 in real time, allowing the operator to observe while inserting or removing the device, achieving dynamic detection throughout the entire process.

[0070] When it is necessary to observe the lateral structure or local defects of the barrel, a side mirror 7 can be installed at the lens connector 24, and the side image can be turned 90 degrees by the reflector 73 and entered into the inspection lens 1 to realize the side-view inspection function.

[0071] The device operates on a principle combining optical imaging with mechanical stabilization. The mechanical components, through a coaxial structure of modular rods 3, a support chuck 4, and a lens frame 2, ensure the detection lens 1 remains stable and centered within the bore, preventing image jitter and directional shift. The optical components utilize a wide-angle lens combined with a ring-shaped LED illumination to maximize the field of view and image clarity, while side mirrors 7 enable multi-angle observation. The signal transmission section employs a serpentine cable protection system to prevent damage during mechanical movement and maintain signal stability.

[0072] This structure can not only adapt to various diameters and lengths of bore tube testing tasks, but also efficiently complete testing work in different environments such as the field and laboratory, and has good versatility, stability and scalability.

[0073] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bore universal testing apparatus, characterized by, include: The detection lens (1) is used to acquire images or videos of the inside of the barrel; Lens frame (2), the detection lens (1) is installed in the lens frame (2), and the lens frame (2) is provided with a support structure for limiting and protecting the detection lens; Multiple rods (3), one end of each rod (3) can be connected to the lens frame (2), and the other end can be quickly connected to the tail rod (5) or another rod (3) for use individually or assembled in sequence from head to tail; The support chuck (4) is detachably installed between the two rods (3) and has different diameter specifications to adapt to different diameter bores and support and position the rods (3) during the testing process. The tail rod (5) is connected to the end of the rod (3) or multiple rods (3) after assembly; The display device (6) is connected to the detection lens (1) via a cable and is used to display the images or videos inside the barrel collected by the detection lens (1) in real time. The device can be adapted to various diameter bores by replacing the support chuck (4) with different diameters, and the number and total length of the rods (3) can be adjusted according to the testing requirements.

2. The universal barrel testing apparatus of claim 1, wherein, The lens frame (2) includes a head plate (21) and a tail plate (23), which are arranged coaxially and are fixedly connected by several vertically arranged connecting rods (22) to form a cylindrical structure; the head plate (21) is provided with a lens connecting seat (24) in the middle, which is detachably fixedly connected to the detection lens (1); the tail plate (23) is provided with a rod connecting member (25), which is detachably connected to one end of the rod member (3).

3. The universal barrel inspection apparatus of claim 1, wherein, The rod (3) includes a rod body (31), which is a hollow rod-shaped member; one end of the rod body (31) is configured as a plug-in part (32), and the other end is configured as a receiving part (33). The insertion part (32) can be inserted into the receiving part (33) of another rod (3) or into the tail rod (5); The receiving part (33) can be connected to another rod (3) or to the lens frame (2); The outer diameter of the insertion part (32) is smaller than the inner diameter of the receiving part (33). A spring plunger is provided on the circumferential surface of the insertion part (32). A limiting hole (34) is provided on the circumferential surface of the receiving part (33). When the insertion part (32) of another rod (3) is inserted into the receiving part (33) of the rod (3), the spring plunger is inserted into the limiting hole (34). Two disc positioning protrusions (35) are provided on the end face of the receiving part (33). When the support chuck (4) is installed between the two rods (3), the two disc positioning protrusions (35) are inserted into the pre-set notch of the support chuck (4) to complete the limiting of the support chuck (4).

4. The barrel universal testing apparatus of claim 3, wherein, The support chuck (4) includes a chuck body (41) with different diameter specifications; a chuck positioning hole (42) is provided at the center of the chuck body (41); the diameter of the chuck positioning hole (42) is larger than the outer diameter of the insertion part (32) and smaller than the outer diameter of the receiving part (33); a notch corresponding to the chuck positioning protrusion (35) is provided at the edge of the chuck positioning hole (42).

5. The barrel universal testing apparatus of claim 3, wherein, The tail rod (5) includes a tail rod part with the same structure as the receiving part (33) of the rod (3), and the tail rod part is fitted with an anti-slip sleeve.

6. The universal barrel testing apparatus of any one of claims 1-5, wherein, The detection lens (1) is a wide-angle lens.

7. The universal barrel testing apparatus of any one of claims 1-5, wherein, The display device (6) is a handheld display, a desktop display, a smartphone, or a small computer; the cable connecting the display device (6) to the detection lens (1) is fitted with a snake tube, which passes through the cavity of several rods (3) so that the two ends of the cable are connected to the display device (6) and the detection lens (1).

8. The barrel universal testing apparatus of claim 2, wherein, The side of the lens connector (24) not connected to the detection lens (1) is detachably connected to a side mirror (7) for reflecting the image of the inner wall of the bore.

9. The barrel universal testing apparatus of claim 8, wherein, The side mirror (7) includes a connecting ring (71) coaxially connected to the lens connecting seat (24); the connecting ring (71) is fixedly connected to the lens seat (72), and a reflector (73) is fixedly connected to the lens seat (72); the reflector (73) forms a 45-degree angle with the central axis of the detection lens (1).

10. A barrel universal testing apparatus according to any one of claims 1-5 or 8 or 9, characterized in that, The detection lens (1) is equipped with a lighting device, which includes a ring-shaped LED light and is arranged circumferentially at the front end of the detection lens; the outer wall of the rod (3) is provided with length scale lines.

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