Gun tube wall detection device

Abstract

The utility model discloses a gun barrel wall detection device. The utility model relates to the technical field of gun barrel process detection. The expansion mechanism comprises a ball screw and a star wheel fixed to a movable nut of the ball screw, a plurality of protruding parts are arranged on the outer portion of the star wheel in an annular array mode, and one end and the other end of a supporting arm are hinged to the protruding parts of the star wheel and the platform respectively. The protruding part of the star wheel extends out of the sleeve through a through groove formed in the outer portion of the sleeve, and the laser range finder and the tension detection assembly are carried on the platform. According to the utility model, the laser range finder and the tension detection assembly are integrated on the same platform, so that displacement and tension data of the wall of the gun barrel can be obtained at the same time in one operation, and the detection efficiency is greatly improved. And through the design of the expansion mechanism and the variable-diameter adjusting mechanism, the detection device can quickly adapt to gun barrels with different calibers, and the time for replacing and adjusting the device is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of gun barrel process detection, specifically to the detection of cylinder drift, and particularly to a gun barrel wall detection device. Background Art

[0002] Cylinder drift refers to the axial or radial offset of the gun barrel after being stressed, which will affect the shooting accuracy of the artillery. Through the tensile test combined with the cylinder drift measurement, the behavior characteristics of the gun barrel under the stressed state can be comprehensively understood, providing a basis for the calibration and maintenance of the artillery. Moreover, the gun barrel bears extremely high pressure and impact force during firing, and the integrity and structural strength of its inner wall are directly related to the safety and performance of the artillery. The tensile test can evaluate the deformation of the inner wall of the gun barrel under different tensile forces, and then judge whether it meets the design requirements.

[0003] Traditional methods often require manual insertion of testing equipment into the gun barrel for testing, which is not only cumbersome and inefficient in operation, but also may cause measurement errors due to human factors. At the same time, manual testing usually can only detect local areas of the inner wall of the gun barrel and cannot cover multiple directions at one time, so some important deformation or damage information may be missed. And gun barrels of different calibers require different specifications of testing equipment, which increases the detection cost and operation complexity. Traditional methods often lack flexibility and are difficult to quickly adapt to the detection requirements of gun barrels of different calibers.

[0004] Therefore, manual testing is affected by various factors such as operation skills and equipment accuracy, and the accuracy and reliability of the measurement results may be limited. For this reason, the utility model proposes a gun barrel wall detection device. Summary of the Utility Model

[0005] In view of this, the embodiments of the utility model hope to provide a gun barrel wall detection device to solve or alleviate the technical problems existing in the prior art, that is, how to perform cylinder drift detection on the gun barrel wall at one time, while adapting to gun barrel walls of different calibers, and at least provide a beneficial choice for this; the technical solution of the utility model is realized as follows:

[0006] A gun barrel wall detection device includes: an expansion mechanism placed inside the gun barrel and whose volume can be adjusted with a circular variable diameter, and

[0007] a laser rangefinder for detecting the wall curvature;

[0008] a tensile force detection component including a tensile force sensor that can be adjusted in a universal angle and follows the detection of the tensile force of the wall, and the tensile force sensor always adheres to the wall.

[0009] In one embodiment: It further includes a frame and a sleeve disposed outside the frame, and the expansion mechanism is disposed at the sleeve. The outside of the frame is provided with auxiliary fixing fins in an annular array, and the auxiliary fixing fins are engraved with length scales for position adjustment along the length direction. During use, after inserting the sleeve and the expansion mechanism into the gun barrel, the spatial position of the frame is manually fine-tuned through the length scales of the four auxiliary fixing fins in the external array, so that the sleeve and the gun barrel are in a concentric state, facilitating subsequent detection. At the same time, after the position is determined, an external pin or bolt is inserted into the chute of the auxiliary fixing fin and the outer wall of the gun barrel, so that the overall device is fixed to the gun barrel.

[0010] In one embodiment: The expansion mechanism includes a ball screw and a star wheel fixed to the moving nut of the ball screw. A plurality of protrusions are annularly arrayed outside the star wheel. One end and the other end of the support arm are respectively hinged to the protrusion of the star wheel and the platform. The protrusion of the star wheel extends out of the sleeve through a through groove opened on the outside of the sleeve, and the laser rangefinder and the tensile force detection component are carried on the platform.

[0011] In one embodiment: The expansion mechanism includes a motor fixed inside the frame, and the output shaft of the motor is fixedly connected to the threaded rod of one of the ball screws; when the motor rotates, the platform performs the variable diameter adjustment.

[0012] In one embodiment: Considering that the platform must always be parallel to the threaded rod of the ball screw, that is, parallel to the pipe wall, the number of the star wheel and the ball screw is two. The thread directions of the threaded rods of the two ball screws are opposite, and the threaded rods of the two ball screws are fixedly connected to each other. Further, when the two ball screws rotate, the two star wheels will approach or move away from each other. Furthermore, the feed amounts of the two support arms are the same scalar compared to the platform and support the two ends of the platform, so that the platform is always parallel to the threaded rod of the ball screw, that is, parallel to the pipe wall.

[0013] In one embodiment: The tensile force detection component includes a first frame body and a second frame body. A plurality of servo electric cylinders are arranged between the first frame body and the second frame body in an annular array. The cylinder body and the piston rod of the servo electric cylinder are respectively and universally hinged to the opposite sides of the first frame body and the second frame body through a universal joint coupling; the tensile force sensor is carried on the second frame body. During use, by controlling each servo electric cylinder to execute different stroke amounts, the universal angle adjustment of the second frame body and its tensile force sensor can be controlled.

[0014] In one embodiment: Every two adjacent servo electric cylinders are arranged in a V shape. Further, when any one servo electric cylinder reaches the limit stroke point, the two adjacent servo electric cylinders can compensate its stroke amount.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] I. High efficiency: By integrating a laser rangefinder and a tensile force detection component on the same platform, the present utility model realizes the simultaneous acquisition of displacement and tensile force data of the gun barrel wall in one operation, greatly improving the detection efficiency. The design of the expansion mechanism and the variable diameter adjustment mechanism enables the detection device to quickly adapt to gun barrels of different calibers, reducing the time for replacing and adjusting the device.

[0017] II. High precision: The laser rangefinder of the present utility model can provide high-precision displacement measurement, ensuring the accuracy of the detection of the cylindrical drift of the gun barrel wall. The tensile force detection component adopts multiple servo electric cylinders and universal joint couplings to realize the accurate measurement of the tensile force of the gun barrel wall and the universal angle adjustment.

[0018] III. Strong versatility: The variable diameter adjustment mechanism of the present utility model enables the detection device to adapt to gun barrels of different calibers, enhancing the versatility of the device. The stroke of the servo electric cylinder can be accurately controlled, enabling the tensile force detection component to adapt to gun barrel walls of different shapes and calibers.

[0019] IV. Good stability: Multiple servo electric cylinders of the present utility model cooperate with each other to cope with complex detection environments and working conditions, improving the stability of the detection device. The design of the ball screw and the star wheel ensures the smoothness and parallelism of the platform during displacement, further enhancing the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is a perspective three-dimensional schematic diagram of the present utility model;

[0022] Figure 2 is another perspective three-dimensional schematic diagram of the present utility model;

[0023] Figure 3 is a front view perspective schematic diagram of the present utility model;

[0024] Figure 4 is a three-dimensional schematic diagram of a single set of expansion mechanism of the present utility model;

[0025] Figure 5 is a three-dimensional schematic diagram of the tensile force detection component of the present utility model.

[0026] Reference numerals: 1, frame; 101, auxiliary fixing fin; 2, sleeve; 3, expansion mechanism; 301, motor; 302, ball screw; 303, star wheel; 304, support arm; 4, platform; 5, laser rangefinder; 6, tensile force detection component; 601, first frame body; 602, second frame body; 603, servo electric cylinder; 604, universal joint coupling; 605, tensile force sensor. Detailed implementation manners

[0027] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation manners of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below;

[0028] In the prior art, the detection method of the drift amount of the cylinder often requires manual insertion of the test equipment into the gun barrel for testing, which is not only cumbersome and inefficient in operation, but also may cause measurement errors due to human factors. At the same time, manual testing usually can only detect local areas of the inner wall of the gun barrel and cannot cover multiple orientations at one time. Therefore, some important deformation or damage information may be missed. For this reason, please refer to Figures 1-5 , this detailed implementation manner will provide relevant technical solutions to solve the above technical problems: A gun barrel wall detection device mainly consists of two parts: one is an expansion mechanism 3 whose volume can be adjusted in a circular variable diameter manner. This mechanism is placed inside the gun barrel and can be adaptively adjusted according to the size of the inner diameter of the gun barrel; the other is a detection component that changes its position following the variable diameter adjustment of the expansion mechanism, including a laser rangefinder 5 and a tensile force detection component 6. The laser rangefinder 5 is used to detect the curvature of the tube wall, and the tensile force detection component 6 includes a tensile force sensor 605 that can be adjusted in a universal angle manner and always adheres to the tube wall to detect the change of the tensile force of the tube wall in real time.

[0029] In this solution, all the electrical components of the whole device are powered by the commercial power supply; specifically, the electrical components of the whole device are conventionally electrically connected to the commercial power output port through devices such as relays, transformers and button panels to meet the power supply requirements of all the electrical components of this device.

[0030] Specifically, an external controller is provided for this device. This controller is used to connect and control all the electrical components of this device as preset values and drive modes according to a pre-set program; it should be noted that the above drive mode corresponds to the start-stop time intervals, rotational speeds, powers and other output parameters corresponding between the relevant electrical components in the following text, that is, it meets the requirements for the relevant electrical components to drive the relevant mechanical device to operate according to the described functions.

[0031] Preferably, the controller is a PLC controller, and the above control requirements are completed through conventional PLC control modes such as ladder diagrams, sequential function charts, function block diagrams, instruction lists or structured texts; it should be noted that the start-stop time intervals, rotational speeds, powers and other output parameters of the electrical components or other power components driven by its programming are non-limiting; specifically, adjustments to relevant drive controls are made according to actual usage requirements.

[0032] Preferably, the controller is also connected to a control panel (display screen) for visualizing the detection values of the laser rangefinder 5 and the tensile force sensor 605.

[0033] Specifically: The expansion mechanism 3 ensures stable operation in gun barrels of different calibers through mechanical circular diameter adjustment. The laser rangefinder 5 uses the emission and reception of laser beams. By measuring the reflection time of the laser beam on the pipe wall, the arc of the pipe wall can be calculated using existing algorithms, thus achieving high-precision non-contact measurement. The tensile force sensor 605 in the tensile force detection assembly 6 can always maintain close contact with the pipe wall through a universal angle adjustment mechanism. Regardless of how the shape of the pipe wall changes, it can accurately detect the tensile force distribution and changes on the pipe wall.

[0034] It should be noted that the tensile force sensor 605 internally contains strain gauges (also known as resistance strain gauges) as conversion elements, and these strain gauges are attached to specially designed elastic elements (such as elastic bodies or sensitive beams). When the pipe wall is subjected to a tensile force, the elastic element will produce a corresponding elastic deformation, and this deformation will in turn drive the strain gauge to undergo a small bending or stretching. Its detection principle lies in:

[0035] S1. Elastic deformation: The tensile force applied to the pipe wall is transmitted to the internal elastic element of the tensile force sensor 605 through fitting. The elastic element produces an elastic deformation under the action of the external force, and this deformation amount is proportional to the measured tensile force (based on Hooke's law).

[0036] S2. Strain gauge response: The strain gauges attached to the surface of the elastic element undergo small bending or stretching as the elastic element deforms. The resistance value of the strain gauge will change slightly with the change of its strain amount (usually manifested as an increase or decrease in resistance value).

[0037] S3. Electrical signal conversion: The change in the resistance value of the strain gauge is converted into an electrical signal (voltage or current signal) through a corresponding measurement circuit. The magnitude of this electrical signal is proportional to the measured tensile force, thus realizing the process of converting mechanical tensile force into a measurable electrical signal.

[0038] It can be understood that in the above solution: The gun barrel wall detection device integrates multiple functions such as an expansion mechanism, laser ranging, and tensile force detection, achieving a full - range and high - precision detection of the gun barrel wall. The self - adaptive variable - diameter ability of the expansion mechanism enables the device to be applicable to gun barrels of different calibers, improving the versatility and flexibility of detection. The laser rangefinder can accurately measure the curvature of the barrel wall, providing important data for evaluating the geometric shape and manufacturing quality of the gun barrel. The tensile force detection component can monitor the change in tensile force on the barrel wall in real time, helping to detect potential safety hazards such as cracks and deformations, and providing strong technical support for the maintenance and repair of the gun barrel.

[0039] In the technical solution provided by this specific embodiment, please refer to Figures 1-3 : The gun barrel wall detection device further includes a frame 1 and a sleeve 2 arranged outside it, and the expansion mechanism 3 is installed on the sleeve 2. Auxiliary fixing fins 101 are arranged on the outside of the frame 1 in a circular array, and length scales are engraved along their length directions for position adjustment. During actual use, please refer to Figure 3 , first insert the sleeve 2 and the expansion mechanism 3 into the gun barrel (shown as area A in the figure), and then manually fine - tune the spatial position of the frame 1 by observing and adjusting the length scales on the four auxiliary fixing fins 101 to ensure that the sleeve 2 and the gun barrel are concentric, thus facilitating subsequent detection work. When the position is determined, insert pins or bolts at the sliding grooves of the auxiliary fixing fins 101 and the outer wall of the gun barrel (shown as area B in the figure) to fix the entire device on the gun barrel.

[0040] Specifically: The auxiliary fixing fins 101 and length scales on the frame 1 are used for precise position adjustment. The auxiliary fixing fins 101 are arranged on the frame 1 in a circular array, providing multiple adjustment points, enabling the frame 1 to be finely adjusted in multiple directions. The length scale provides an accurate measurement reference, enabling the operator to accurately adjust the position of the frame 1 so that the sleeve 2 and the gun barrel are concentric. Finally, insert pins or bolts to fix the adjusted position to ensure that the device does not move or shake during the detection process.

[0041] It can be understood that in the above solution: the above embodiments enhance the stability and applicability of the gun barrel wall detection device. Through the design of the auxiliary fixing fins 101 and the length scale, the operator can easily and precisely adjust the position of the device to ensure that the sleeve 2 is concentric with the gun barrel, thereby improving the accuracy and reliability of the detection. At the same time, the fixing method of the plug or bolt also makes the device more stable during the detection process and will not move or shake due to external factors, further ensuring the accuracy of the detection results. This design enables the device to be applicable to gun barrels of different calibers and shapes, improving its versatility and practicality.

[0042] In the technical solution provided by this specific embodiment, please refer to Figure 4 : The specific implementation of the expansion mechanism 3 includes a ball screw 302 and a star wheel 303. The ball screw 302 is a precision mechanical transmission component. By rotating the screw on it, the moving nut can move along the axial direction of the screw. The star wheel 303 is a wheel-shaped structure with multiple protrusions, and these protrusions are annularly arranged outside the star wheel 303. The star wheel 303 is fixedly connected to the moving nut of the ball screw 302. Therefore, when the screw of the ball screw 302 rotates, the star wheel 303 will also move accordingly. One end of the support arm 304 is hinged to the protrusion of the star wheel 303, and the other end is hinged to the platform 4. In this way, when the star wheel 303 moves, the support arm 304 will push the platform 4 to displace. The protrusions of the star wheel 303 extend out of the sleeve 2 through the through grooves opened on the outside of the sleeve 2, enabling the star wheel 303 to move inside the sleeve 2 while carrying a laser rangefinder 5 and a tensile force detection component 6 on it for detecting the gun barrel wall.

[0043] Specifically: The working principle of the expansion mechanism 3 is based on the transmission mechanism of the ball screw 302 and the structural design of the star wheel 303. When the screw of the ball screw 302 rotates, the moving nut will move along the axial direction of the screw, thereby driving the star wheel 303 fixed thereto to move. Since one end of the support arm 304 is hinged to the protrusion of the star wheel 303, and the other end of the support arm 304 is hinged to the platform 4, when the star wheel 303 moves, the support arm 304 will push the platform 4 to displace. In this way, by controlling the rotation direction and angle of the screw of the ball screw 302, precise displacement control of the platform 4 can be achieved.

[0044] It can be understood that in the above solution: the design of the expansion mechanism 3 enables the gun barrel wall detection device to adapt to gun barrels of different calibers. By rotating the screw of the ball screw 302, the position of the platform 4 and the variable diameter size of the expansion mechanism 3 can be easily adjusted, enabling the laser rangefinder 5 and the tensile force detection component 6 to closely adhere to the inner wall of gun barrels of different calibers for detection. This design improves the versatility and flexibility of the detection device, enabling it to achieve excellent detection effects in gun barrels of various calibers.

[0045] In the technical solution provided by this specific embodiment, please refer to Figure 4 : The expansion mechanism 3 includes a motor 301 fixedly arranged in the frame 1. The output shaft of the motor 301 is fixedly connected to the threaded rod of the ball screw 302, so that the rotational motion of the motor 301 can be directly converted into the rotational motion of the threaded rod. When the motor 301 rotates, due to the thread fit between the threaded rod and the moving nut, the moving nut will move along the axial direction of the threaded rod. Since the moving nut is fixedly connected to the star wheel 303, the star wheel 303 will also move accordingly. Further, since one end of the support arm 304 is hinged to the protruding part of the star wheel 303 and the other end is hinged to the platform 4, the movement of the star wheel 303 will be converted into the displacement of the platform 4. In this way, by rotating the motor 301, the diameter adjustment of the platform 4 can be achieved.

[0046] Specifically: The motor 301 serves as the power source and drives the threaded rod to rotate through the rotation of its output shaft. The thread fit relationship between the threaded rod and the moving nut enables the moving nut to move axially when the threaded rod rotates. This movement is further transmitted through the star wheel 303 and the support arm 304 and converted into the displacement of the platform 4. Since the laser rangefinder 5 and the tension detection component 6 are mounted on the platform 4, the displacement of the platform 4 realizes the position adjustment of these detection instruments, so as to adapt to gun barrels of different calibers.

[0047] It can be understood that in the above solution: By driving the ball screw 302 with the motor 301 to achieve the diameter adjustment of the platform 4, it has the advantages of high automation and high adjustment accuracy. The rotation speed and direction of the motor 301 can be precisely controlled, so the displacement of the platform 4 can also be precisely adjusted. This enables the gun barrel wall detection device to adapt to more gun barrels of different calibers, improving its versatility and detection efficiency. At the same time, since the driving force of the motor 301 is stable and reliable, the accuracy and repeatability of the detection results are also guaranteed.

[0048] In the technical solution provided by this specific embodiment, please refer to Figure 4: To ensure that the platform 4 always remains parallel to the threaded rod of the ball screw 302, that is, parallel to the gun barrel wall, the gun barrel wall detection device adopts the design of two ball screws 302 and two star wheels 303. The thread directions of the threaded rods of these two ball screws 302 are opposite. When they rotate simultaneously, they will generate axial movements in opposite directions. At the same time, the threaded rods of these two ball screws 302 are fixedly connected to each other to ensure that they can rotate synchronously. Since the two star wheels 303 are respectively fixedly connected to the moving nuts of these two ball screws 302, when the ball screws 302 rotate, the two star wheels 303 will move closer to or away from each other. One end of each of the two support arms 304 is hinged to the protrusions of the two star wheels 303, and the other ends are jointly supported at both ends of the platform 4. In this way, when the two star wheels 303 move closer to or away from each other, the feed amounts of the two support arms 304 are equal, thereby ensuring that the platform 4 always remains parallel to the threaded rod of the ball screw 302, that is, parallel to the gun barrel wall.

[0049] Specifically: Based on the design of the opposite thread directions and synchronous rotation of the threaded rods of the two ball screws 302. When the two ball screws 302 rotate simultaneously, due to their opposite thread directions, they will generate axial movements in opposite directions. This movement in the opposite directions is transmitted through the star wheels 303 and the support arms 304 and is converted into a smooth displacement of the platform 4 without deflection or tilt. Since the feed amounts of the two support arms 304 are equal, the platform 4 always remains parallel to the threaded rod of the ball screw 302 during the displacement process, that is, parallel to the gun barrel wall.

[0050] It can be understood that in the above solution: By adopting the design of two ball screws 302 and two star wheels 303, a smooth and parallel displacement adjustment of the platform 4 is achieved. This design ensures that the laser rangefinder 5 and the tensile force detection component 6 always remain parallel to the gun barrel wall during the detection process, thereby improving the accuracy and reliability of the detection. At the same time, due to the synchronous rotation design of the two ball screws 302, the displacement of the platform 4 is also more stable and controllable, further improving the detection efficiency and versatility of the gun barrel wall detection device.

[0051] In the technical solution provided by this specific embodiment, please refer to Figures 4-5:The tensile force detection assembly 6 is composed of a first frame body 601 and a second frame body 602. A plurality of servo cylinders 603 are arranged between these two frame bodies in a circular array. The cylinder body and the piston rod of the servo cylinder 603 are respectively and universally hinged to the opposite surfaces of the first frame body 601 and the second frame body 602 through a universal joint coupling 604. In this way, the servo cylinder 603 can not only expand and contract in the length direction, but also perform universal angle adjustment between the first frame body 601 and the second frame body 602 through the universal joint coupling 604. The tensile force sensor 605 is mounted on the second frame body 602 and is used to detect the tensile force on the gun barrel wall.

[0052] Specifically: By controlling each servo cylinder 603 to execute different stroke amounts, the position and angle of the second frame body 602 relative to the first frame body 601 can be changed. Since the tensile force sensor 605 is mounted on the second frame body 602, the change in the position and angle of the second frame body 602 will drive the tensile force sensor 605 to perform corresponding universal angle adjustment. In this way, no matter how the shape of the gun barrel wall changes, the tensile force sensor 605 can always maintain close contact with the wall, so as to detect the tensile force distribution and change situation on the wall in real time. Or based on a preset, control each servo cylinder 603 to execute different stroke amounts at different time steps, that is, control the tensile force sensor 605 to perform position and angle adjustment along a certain trajectory space to expand the detection area and detection effect.

[0053] It can be understood that in the above solution: By adopting the design of a plurality of servo cylinders 603 and universal joint couplings 604, the universal angle adjustment function of the tensile force detection assembly 6 is realized. This enables the tensile force sensor 605 to adapt to gun barrel walls of different shapes and calibers, always maintain close contact with the wall, and improve the accuracy and reliability of tensile force detection. At the same time, since the stroke amount of the servo cylinder 603 can be precisely controlled, the position and angle adjustment of the tensile force sensor 605 are also more flexible and precise. This design further enhances the versatility and detection efficiency of the gun barrel wall detection device.

[0054] In the technical solution provided by this specific embodiment, please refer to Figure 5 : The plurality of servo cylinders 603 of the tensile force detection assembly 6 are specifically designed to be arranged in a V shape with two adjacent ones. This arrangement means that for any servo cylinder 603, there are two adjacent servo cylinders 603, and a V-shaped included angle is formed between them.

[0055] Specifically: The principle of this V-shaped arrangement is that when any one of the servo cylinders 603 reaches its limit stroke point, since it forms a V-shaped structure with the other two adjacent servo cylinders 603, these two adjacent servo cylinders 603 still have a certain amount of telescopic margin. Therefore, they can compensate for the stroke of the servo cylinder 603 that reaches the limit stroke point, that is, adjust the position and angle of the second frame 602 by further telescoping to ensure that the tension sensor 605 can be in close contact with the gun barrel wall.

[0056] It can be understood that in the above solution: This design method of V-shaped arrangement improves the adaptability and flexibility of the tension detection component 6 because even if some of the servo cylinders 603 reach the limit stroke point, the other servo cylinders 603 can still be adjusted. Secondly, it enhances the degree of fit between the tension sensor 605 and the gun barrel wall, ensuring accurate measurement of the tension sensor 605 regardless of how the shape of the wall changes. Finally, this design also improves the overall stability and reliability of the gun barrel wall detection device because multiple servo cylinders 603 can cooperate together to cope with complex detection environments and working conditions.

[0057] The above-described embodiments only express the implementation manners of the relevant practical applications of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A gun barrel wall detection device, characterized in that, Including: An expansion mechanism (3) placed inside the gun barrel and with a volume that can be adjusted in a circular variable diameter, and a position change occurs following the variable diameter adjustment, A laser rangefinder (5) for detecting the arc of the pipe wall; A tensile force detection assembly (6) including a tensile force sensor (605) that can be adjusted in all directions and follows the detection of the tensile force of the pipe wall.

2. The pipe wall detection device according to claim 1, characterized in that: It also includes a frame (1) and a sleeve (2) provided outside it, and the expansion mechanism (3) is provided at the sleeve (2).

3. The pipe wall detection device according to claim 2, characterized in that: Auxiliary fixing fins (101) are arranged in an annular array outside the frame (1), and a length scale for position adjustment is engraved along the length direction of the auxiliary fixing fins (101).

4. The pipe wall detection device according to claim 1, wherein: The expansion mechanism (3) includes a ball screw (302) and a star wheel (303) fixed to the moving nut of the ball screw (302). One end and the other end of the support arm (304) are respectively hinged to the star wheel (303) and the platform (4), and the laser rangefinder (5) and the tensile force detection assembly (6) are carried on the platform (4).

5. The pipe wall detection device according to claim 4, wherein: The expansion mechanism (3) includes a motor (301), and the output shaft of the motor (301) is fixedly connected to the threaded rod of the ball screw (302); when the motor (301) rotates, the platform (4) performs the variable diameter adjustment.

6. The pipe wall detection device according to claim 4, wherein: The number of the star wheels (303) and the ball screws (302) is two. The thread directions of the threaded rods of the two ball screws (302) are opposite, and the threaded rods of the two ball screws (302) are fixedly connected to each other; thus, when the two ball screws (302) rotate, the two star wheels (303) will approach or move away from each other, and thus the feed amounts of the two support arms (304) are equal scalars compared to the platform (4) and support at both ends of the platform (4).

7. The pipe wall detection device according to claim 1, 4 or 6, characterized in that: The tensile force detection assembly (6) includes a first frame body (601) and a second frame body (602). A plurality of servo cylinders (603) are arranged in an annular array between the first frame body (601) and the second frame body (602). The cylinder body and the piston rod of the servo cylinder (603) are respectively hinged in all directions on the opposite surfaces of the first frame body (601) and the second frame body (602); the tensile force sensor (605) is carried on the second frame body (602).

8. The pipe wall detection device according to claim 7, wherein: Every two adjacent servo cylinders (603) are arranged in a V shape.

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