Oxygen bomb safety performance detection system

Abstract

The utility model relates to an oxygen bomb safety performance detection system which comprises a measurement platform, and the top of the measurement platform is provided with a stepping motor used for driving an oxygen bomb to rotate. The driving end of the stepping motor is provided with a lifting assembly which is rotationally matched and connected with the measuring platform and is used for adjusting the height of the oxygen bomb; a fixing assembly is further arranged at the top of the measuring platform and used for fixing a bomb body of the oxygen bomb; the radial pushing assembly is used for pushing the connecting ring of the oxygen bomb in the radial direction; the axial pushing assembly is used for pushing a connecting ring of the oxygen bomb in the axial direction; the water pressure generating assembly is used for providing liquid pressure into the oxygen bomb; the pressurizing connecting assembly is used for connecting the water pressure generating assembly with the oxygen bomb in a sealing manner; the deformation microspur detection assembly comprises at least one pair of online projection image measuring instruments which are arranged at the top of the measuring platform and symmetrically distributed on the two sides of the lifting assembly, safety detection can be conducted on the oxygen bombs of various specifications through cooperation of the measuring platform and the online projection image measuring instruments, and the detection efficiency and the detection precision are improved.

Description

An oxygen bomb safety performance testing system Technical Field

[0001] This application belongs to the field of oxygen bomb testing technology, and specifically relates to an oxygen bomb safety performance testing system. Background Technology

[0002] An oxygen bomb calorimeter is an instrument used to determine the calorific value of substances that can burn completely in oxygen. The oxygen bomb, as the combustion chamber of the calorimeter, must withstand the high temperature and pressure environment generated during the combustion of the internal sample. An oxygen bomb typically consists of a cover, a bomb body, and a connecting ring that secures the cover to the bomb body via a threaded connection. To ensure the oxygen bomb can safely determine the calorific value of the sample, its safety performance needs to be tested periodically or before experiments. Among these tests, the deformation test results on the surface of the oxygen bomb best reflect its performance and condition, especially the radial and axial looseness of the threads between the oxygen bomb and the connecting ring, and the change in diameter at half the height of the bomb body after a hydrostatic test.

[0003] In existing technology, the radial looseness of the oxygen bomb thread is measured using the test device specified in MT / T737-2007 "Specification for Safety Performance Inspection of Oxygen Bomb in Calorimeter". This test device includes a measuring platform; an oxygen bomb holder mounted on the measuring platform for fixing the oxygen bomb; a test ring for moving the threaded connecting ring of the oxygen bomb; and a dial indicator for measuring the surface deformation of the oxygen bomb. Although this device can meet the basic measurement requirements of the oxygen bomb, it has the following problems: First, when detecting the radial looseness of the oxygen bomb thread, the operator needs to manually move the test ring to loosen the threaded connecting ring axially or radially. Since multiple points need to be tested, the manual operation is cumbersome, resulting in low testing efficiency. Second, uneven force application or loosening and rebound of the connecting ring during the movement of the connecting ring can easily lead to large testing errors. Third, the oxygen bomb holder requires manual operation to fix the oxygen bomb, which has limited adaptability when performing micro-deformation testing on multiple points of the oxygen bomb or oxygen bombs of different specifications. Summary of the Invention

[0004] Based on the aforementioned technical needs, this application provides an oxygen bomb safety performance testing system that can solve the technical problems in the prior art where, when testing the radial looseness of the threaded connection of an oxygen bomb, the operator needs to manually move the test ring to cause axial or radial loosening of the threaded connection ring. Since multiple points need to be tested, the manual operation is cumbersome, resulting in low testing efficiency. Furthermore, the uneven force applied when moving the connection ring or the loosening and rebound of the dial indicator during contact measurement leads to large testing errors. Additionally, the oxygen bomb holder requires manual operation to fix the oxygen bomb, which limits its adaptability when performing micro-deformation testing on multiple points of the oxygen bomb or oxygen bombs of different specifications.

[0005] To achieve the above objectives, the technical solution of this application is as follows:

[0006] An oxygen bomb safety performance testing system includes a measuring platform with a stepper motor mounted on top for driving the oxygen bomb to rotate; a lifting assembly mounted on the drive end of the stepper motor and rotatably connected to the measuring platform for adjusting the height of the oxygen bomb; a fixing assembly mounted on top of the measuring platform for fixing the oxygen bomb body; a radial pushing assembly mounted on top of the measuring platform and located on one side of the lifting assembly for radially pushing the connecting ring of the oxygen bomb; an axial pushing assembly mounted on top of the measuring platform and located on one side of the lifting assembly for axially pushing the connecting ring of the oxygen bomb; a water pressure generating assembly for providing liquid pressure to the oxygen bomb; a pressurizing connection assembly mounted on top of the measuring platform for sealing the water pressure generating assembly to the oxygen bomb; and a deformation micro-detection assembly including at least one pair of online projection image measuring instruments, the pair of online projection image measuring instruments being mounted on top of the measuring platform and symmetrically distributed on both sides of the lifting assembly.

[0007] Preferably, the projection direction of the online projection image measuring instrument is perpendicular to the direction in which the radial pushing component pushes the connecting ring of the oxygen bomb.

[0008] Preferably, the lifting assembly includes a lifting platform and a connecting base. The connecting base has a cylindrical structure and is rotatably connected to the measuring platform. The drive shaft of the stepper motor is coaxially connected to the connecting base. A drive motor is installed inside the connecting base. The lifting platform and the side wall of the connecting base are in sliding frictional engagement. The drive shaft of the drive motor is in drive engagement with the lifting platform through a threaded structure. The drive motor is used to drive the lifting platform to move vertically.

[0009] Preferably, the top of the lifting platform is provided with an anti-slip part.

[0010] Preferably, the anti-slip part includes a rubber anti-slip coating fixed to the top of the lifting platform or a vacuum suction cup coaxially fixed to the top of the lifting platform.

[0011] Preferably, the fixing component includes at least one pair of brackets, any pair of brackets being disposed on the top of the measuring platform and symmetrically distributed on both sides of the lifting component; a first push rod is disposed at the top of the bracket, and a projectile fixing component is disposed at the output end of the first push rod, the first push rod being used to synchronously drive the projectile fixing component to move radially; a first pressure sensor is disposed on one side of the projectile fixing component, the first pressure sensor being electrically connected to the first push rod.

[0012] Preferably, the radial pushing assembly includes a first lifting frame, which is disposed on the top of the measuring platform and located on one side of the lifting assembly. The output end of the first lifting frame is provided with a second push rod, and the output end of the second push rod is provided with a connecting ring pusher. The first lifting frame is used to drive the second push rod to move axially, and the second push rod is used to drive the connecting ring pusher to move radially. A second pressure sensor is disposed on one side of the connecting ring pusher, and the second pressure sensor is electrically connected to the second push rod.

[0013] Preferably, the axial pushing assembly includes at least one pair of second lifting frames, any pair of second lifting frames being disposed on the top of the measuring platform and symmetrically distributed on both sides of the lifting assembly. A third push rod is disposed at the output end of each second lifting frame, a fourth push rod is disposed at the output end of each third push rod, and a lever is disposed at the output end of each fourth push rod. The second lifting frame drives the third push rod to move axially, the third push rod drives the fourth push rod to move radially, and the fourth push rod drives the lever to move axially. A third pressure sensor is disposed at the top end of the lever, and the third pressure sensor is electrically connected to the fourth push rod.

[0014] Preferably, the pressurization connection assembly includes a gantry frame, a lead screw, and an oxygen bomb pressure head disposed on the top of the measuring platform. The gantry frame is symmetrically distributed on both sides of the lifting assembly. The lead screw is threadedly driven into the gantry frame along the axial direction. The oxygen bomb pressure head is disposed at the lower end of the lead screw. A pressure connector is provided at the lower end of the oxygen bomb pressure head. A pressure interface is provided on the side of the oxygen bomb pressure head. The pressure connector is connected to the pressure interface.

[0015] Preferably, the water pressure generating component includes a water tank, a pre-pressurization pump, and a water supply pipe. The pre-pressurization pump is connected to the water tank. One end of the water supply pipe is connected to the pre-pressurization pump, and the other end is connected to the pressure interface. A pressure-boosting shut-off valve and a return pipe are spaced apart on the water supply pipe. The two ends of the return pipe are connected to the water supply pipe and the water tank, respectively. A pressure-reducing valve is provided on the return pipe.

[0016] By adopting the above technical solution, compared with the prior art, this application has at least the following beneficial effects:

[0017] The online projection image measuring instrument and the measuring platform can acquire the displacement of radial or axial loosening of the connecting ring in multiple oxygen bomb projections. Utilizing the online projection image measuring instrument's ability to accurately and directly measure structural tolerances and clearances, combined with existing methods for oxygen bomb testing, it enables precise and efficient detection of radial and axial loosening of the oxygen bomb threads, as well as the diameter of the oxygen bomb body at half its height after depressurization. The entire testing process eliminates the need for inefficient and technically dependent equipment such as outside micrometers and dial indicators used in existing technologies, simplifying the testing process. Furthermore, the lifting assembly and the online projection image measuring instrument enable safety testing of oxygen bombs of various specifications, improving the adaptability of the testing equipment. Attached Figure Description

[0018] Figure 1 is a schematic diagram A of the orthographic projection of the radial loosening of the oxygen bomb in the embodiment.

[0019] Figure 2 is a schematic diagram B of the orthographic projection of the oxygen bomb axial loosening in the embodiment.

[0020] Figure 3 is a schematic diagram C of the orthographic projection of the oxygen bomb diameter deformation in the embodiment.

[0021] Figure 4 is a schematic diagram of the assembly of the oxygen bomb safety performance testing system in the embodiment.

[0022] Figure 5 is a cross-sectional view of the oxygen bomb safety performance testing system in the embodiment.

[0023] Figure 6 is a partially enlarged cross-sectional view E of the oxygen bomb safety performance testing system in the embodiment (taken from Figure 5).

[0024] Figure 7 is an isometric structural diagram of the oxygen bomb safety performance testing system in the embodiment.

[0025] Figure 8 is a partial enlarged view F of the oxygen bomb safety performance testing system in the embodiment (taken from Figure 7).

[0026] In the diagram: Measurement platform 10, stepper motor 11, lifting assembly 20, connecting base 21, lifting platform 22, anti-slip part 221, drive motor 23, fixing assembly 30, bracket 31, first push rod 32, projectile fixing part 321, first pressure sensor 322, radial pushing assembly 40, first lifting frame 41, second push rod 42, connecting ring pushing part 421, second pressure sensor 422, axial pushing assembly 50, second lifting frame 51, third push rod 52. Fourth push rod 53, lever 531, third pressure sensor 532, pressurization connection assembly 60, gantry frame 61, lead screw 62, crank handle 621, oxygen bomb pressure head 63, pressure connector 64, pressure interface 641, water pressure generating assembly 70, water tank 71, pre-pressurization pump 72, water supply pipe 73, pressurization shut-off valve 731, return water pipe 74, pressure reducing valve 741, deformation micro-detection assembly 80, online projection image measuring instrument 81, oxygen bomb 90, bomb body 91, connecting ring 92. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The technical solutions of this application will be further described below with reference to the accompanying drawings of the embodiments, and this application is not limited to the following specific implementation methods.

[0028] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "inner," "outer," "left," "right," "front," "rear," "top," and "bottom" indicate directions or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limitations on this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0029] The present application will be further described in detail below with reference to Figures 1 to 8 and specific embodiments.

[0030] This application discloses an oxygen bomb safety performance testing system, which can be used to detect the radial looseness of the threads of an oxygen bomb, the axial looseness of the threads of an oxygen bomb, and the diameter deformation at 1 / 2 height of the bomb body.

[0031] The system includes a measuring platform 10 for providing a horizontal plane for measuring the oxygen bomb 90. In one specific embodiment, the measuring platform 10 is a hollow box with a stepper motor 11 embedded in its top surface. The driving end of the stepper motor 11 can drive the oxygen bomb 90 to rotate. It also includes a lifting assembly 20, located at the driving end of the stepper motor 11 and rotatably connected to the top of the measuring platform 10, for supporting the oxygen bomb 90 and adjusting its height. Furthermore, it includes a fixing assembly 30, located on the top of the measuring platform 10, for fixing the bomb body 91; a radial pushing assembly 40, located on the top of the measuring platform 10 and on one side of the lifting assembly 20, for radially pushing the connecting ring 92; an axial pushing assembly 50, located on the top of the measuring platform 10 and on one side of the lifting assembly 20, for axially pushing the connecting ring 92; and a water pressure generating assembly 70, for providing liquid pressure to the oxygen bomb 90 to apply 20°C pressure to the oxygen bomb 90. The test includes a water pressure test; a pressurization connection assembly 60, located on the top of the measuring platform 10, for sealing the water pressure generating assembly 70 with the oxygen bomb 90; and a deformation micro-distance detection assembly 80, including at least one set of online projection image measuring instruments 81, located on the top of the measuring platform 10 and symmetrically distributed on both sides of the lifting assembly 20, for forming a proportional projection surface of the oxygen bomb 90 and detecting the distance between any points on the projection contour of the oxygen bomb 90 within the projection surface.

[0032] The steps for using this system are as follows: The fixing component 30 fixes the bomb body 91. The axial pushing component 50 and the radial pushing component 40 push the connecting ring 92 with a preset thrust, causing the connecting ring 92 to tend to loosen, or to loosen radially or axially. The stepper motor 11 drives the oxygen bomb 90 to rotate around its axis in place. Using the parallel light projection principle of the online projection image measuring instrument 81, 1:1 orthographic projection images of the contours of the connecting ring 92 before and after loosening are obtained. Based on the multi-angle projection images of the oxygen bomb 90, the displacement of the connecting ring 92 due to radial or axial loosening is obtained. Then, the radial and axial loosening of the oxygen bomb's threads are obtained through statistical calculation. After resetting the oxygen bomb 90, the lifting assembly... Component 20 adjusts the height of the oxygen bomb 90. Since the projection and measurement range of the online projection image measuring instrument 81 is limited, when its projection range cannot cover the overall outline of the oxygen bomb body, it is necessary to adjust the outline of the oxygen bomb body at 1 / 2 height to the projection range of the online projection image measuring instrument 81 based on the lifting adjustment component, so that the online projection image measuring instrument 81 can detect the diameter at 1 / 2 height of the bomb body. The water pressure generating component 70 is connected to the oxygen bomb 90 through the pressurization connection component 60. After conducting a water pressure test and depressurizing, the diameter of the oxygen bomb 90 at 1 / 2 height of the bomb body before pressurization and after depressurization is output by the online projection image measuring instrument 81. The difference between the two can be used to calculate the diameter deformation at 1 / 2 height of the bomb body.

[0033] The system using this application has at least the following beneficial effects:

[0034] The online projection image measuring instrument 81 and the measuring platform 10 can acquire the displacement of the connecting ring 92 in multiple oxygen bomb projections, indicating radial or axial loosening. Utilizing the online projection image measuring instrument 81's ability to accurately and directly measure structural tolerances and clearances, combined with existing methods for oxygen bomb 90 measurement, it enables precise and efficient detection of the radial and axial loosening of the oxygen bomb threads, as well as the diameter of the oxygen bomb 90 at half its height after depressurization. The entire testing process eliminates the need for inefficient and technically dependent equipment such as outside micrometers and dial indicators used in existing technologies, simplifying the testing process. Furthermore, the lifting assembly 20 and the online projection image measuring instrument 81 enable safe testing of oxygen bombs 90 of various specifications, improving the adaptability of the testing equipment.

[0035] The following provides some specific implementation methods to improve the above-mentioned oxygen bomb safety performance testing system in order to achieve the corresponding functions.

[0036] Preferably, the line projection image measuring instrument 81 involved in this application is a Keyence TM-X5000 series, and the system of this application performs safety testing on the oxygen bomb 90 in accordance with MT / T 737-2007 "Specification for Safety Performance Testing of Calorimeter Oxygen Bomb".

[0037] Based on the above implementation, in order to ensure that the online projection image measuring instrument 81 can clearly detect the radial loosening of the thread between the connecting ring 92 and the projectile 91, when the online projection image measuring instrument 81 is set on the top of the measuring platform 10, its projection direction must be perpendicular to the direction in which the radial pushing component 40 applies radial thrust to the oxygen bomb 90. This ensures that the projection surface of the oxygen bomb 90 is parallel to the direction in which the connecting ring 92 becomes radially loose. When the oxygen bomb 90 is pushed, the connecting ring 92 of the oxygen bomb 90 loosens relative to the projectile 91 in a direction parallel to the projection surface, so that the online projection image measuring instrument 81 can output the radial loosening value of the thread proportionally.

[0038] Furthermore, to enable fine-tuning of the projectile 91's projection position in the height direction for measuring the diameter change at half the projectile's height after the hydrostatic test, the aforementioned lifting assembly 20 includes a connecting base 21 mounted on the drive shaft of the stepper motor 11, a drive motor 23 mounted on the top of the connecting base 21, and a lifting platform 22 mounted on the drive shaft of the drive motor 23. The connecting base 21 is cylindrical, with its bottom surface coaxially fixed to the drive shaft of the stepper motor 11. Its side surface is rotatably connected to the top surface of the measuring platform 10 via bearings. Its inner surface slides into the cylindrical lifting platform 22. The drive motor 23 is a servo motor, and its drive shaft... One end is machined with a threaded structure or a connecting screw 62. A threaded hole is set at the bottom center of the lifting platform 22 and is threadedly driven to the drive shaft of the drive motor 23. The servo motor can drive the lifting platform 22 to rotate forward or reverse, so that the lifting platform 22 rotates and rises or falls under the action of the threaded structure. When the servo motor does not output power, the friction between the lifting platform 22 and the connecting base 21 keeps the lifting platform 22 locked in the vertical direction. As a result, when the stepper motor 11 drives the connecting base 21 to rotate relative to the measuring platform 10, the lifting platform 22 only rotates synchronously with the connecting base 21 and does not move up or down. This allows the lifting platform 22 to carry the oxygen bomb 90 and move up and down.

[0039] To ensure the oxygen bomb 90 can rotate smoothly and in place, an anti-slip part 221 is provided on the top of the lifting platform 22 to increase the friction between its top surface and the oxygen bomb 90, ensuring that the oxygen bomb 90 can rotate with the drive shaft of the stepper motor 11 and preventing the oxygen bomb 90 from slipping and deviating. More specifically, the anti-slip part 221 can be a rubber anti-slip coating laid on the top surface of the lifting platform 22, or it can be a vacuum suction cup coaxially fixed to the top surface of the lifting platform 222.

[0040] Furthermore, the aforementioned fixing component 30 includes at least one pair of brackets 31. Any pair of brackets 31 is disposed on the upper part of the top surface of the measuring platform 10 and symmetrically distributed on both sides of the aforementioned lifting component 20. In a preferred embodiment, the axis of symmetry is the extension line of the drive shaft of the aforementioned stepper motor 11. The top end of the bracket 31 is respectively provided with a first push rod 32, and the output end of the first push rod 32 is provided with a spring fixing member 321. Specifically, the first push rod 32 is a servo electric push rod, and the projectile fixing member 321 is a push plate or claw with one side arc-shaped. The arc-shaped side is used to fit and hold the projectile 91, and the other side of the projectile fixing member 321 is connected to the output shaft of the servo electric push rod. The first push rod 32 can push the projectile fixing member 321 to move synchronously in the radial direction. In order to ensure that the fixing component 30 can adjust the corresponding thrust according to the specifications of the oxygen bomb 90 to be tested, so as to fix oxygen bombs 90 of different diameters, the surface of the projectile fixing member 321 that can contact the projectile 91 is embedded with a first pressure sensor 322 that is electrically connected to the first push rod 32. Under the premise that the thrust value of the first push rod 32 is set, the first push rod 32 can perform pushing or stopping pushing based on the pressure signal fed back by the first pressure sensor 322, so that the pair of projectile fixing members 321 can hold the projectile 91 with the set thrust, thereby avoiding insufficient thrust causing the projectile 91 to loosen or excessive thrust damaging the first push rod 32 or the oxygen bomb 90.

[0041] In another embodiment, the following differences exist from the above embodiments:

[0042] While other structural aspects remain the same, the fixing component 30 differs. In this embodiment, the fixing component 30 includes an industrial suction cup with adjustable adsorption force (replacing the vacuum suction cup of the above embodiment). This industrial suction cup is coaxially fixed to the upper end of the drive shaft of the stepper motor 11 with its adsorption surface facing upwards. The stepper motor 11 can drive the industrial suction cup to rotate around its axis, thereby causing the oxygen bomb 90 adsorbed on the top of the industrial suction cup to rotate. When it is necessary to remove or replace the oxygen bomb 90, the adsorption force of the industrial suction cup can be adjusted to ensure that it firmly adheres to the bottom of the bomb body 91 or releases the oxygen bomb 90.

[0043] In a preferred embodiment, the radial pushing assembly 40 includes a first lifting frame 41 disposed on the top of the measuring platform 10 and located on one side of the lifting assembly 20. The output end of the first lifting frame 41 is provided with a second push rod 42, and the output end of the second push rod 42 is provided with a connecting ring pusher 421. Specifically, the connecting ring pusher 421 is an arc-shaped push plate that can fit the side of the connecting ring 92. The first lifting frame 41 includes a servo electric push rod that can output in the vertical direction, and its output end is provided with another servo electric push rod (i.e., the second push rod 42) that can output in the radial direction. The output end of the latter is connected to the connecting ring pusher 421. The first lifting frame 41 adjusts the position of the connecting ring pusher 421 in the vertical direction so that it is within the height range of the connecting ring 92 (in order to make the thrust applied to the connecting ring 92 relatively uniform, the connecting ring pusher 421 should contact the middle part of the side of the connecting ring 92). The second push rod 42 on the first lifting frame 41 can drive the connecting ring pusher 421 radially to apply a set thrust to the connecting ring 92.

[0044] To ensure that the radial pushing assembly 40 can accurately apply the set radial thrust to the connecting ring 92, the connecting ring pushing member 421 is provided with a second pressure sensor 422 electrically connected to the second push rod 42 on one side surface that can contact the connecting ring 92. Under the premise that the thrust value of the second push rod 42 is set, the second push rod 42 can perform pushing or stopping pushing based on the pressure signal fed back by the second pressure sensor 422, so that the connecting ring pushing member 421 can apply the set thrust to the connecting ring 92, thereby avoiding insufficient thrust causing the connecting ring 92 and the projectile 91 to not loosen the threads, or excessive thrust damaging the thread structure or causing the connecting ring 92 to deform, resulting in inaccurate radial looseness measurement values.

[0045] Furthermore, to improve the efficiency of the oxygen bomb safety performance testing system in measuring the radial looseness of the oxygen bomb, a pair of radial pushing components 40 can be provided and symmetrically distributed on both sides of the lifting component 20, so that the connecting ring 92 can be pushed to the left or to the right by any one of the radial pushing components 40. By using different radial pushing components 40 in turn, the oxygen bomb 90 can be rotated at a smaller angle and the same number of measurement points can be obtained along the radial displacement in the oxygen bomb projection plane, thereby improving the measurement efficiency.

[0046] In one embodiment, the aforementioned axial pushing assembly 50 includes at least one pair of second lifting frames 51 disposed on the top of the measuring platform 10. Any pair of second lifting frames 51 are symmetrically distributed on both sides of the lifting assembly 20. The output end of each second lifting frame 51 is provided with a third push rod 52, the output end of the third push rod 52 is provided with a fourth push rod 53, and the output end of the fourth push rod 53 is provided with a lever 531. Specifically, in a preferred embodiment, the second lifting frame 51 includes a servo-electric push rod capable of outputting in a vertical direction, and its output end is provided with another servo-electric push rod (i.e., the third push rod 52) capable of outputting in a radial direction. The second lifting frame 51 can push the third push rod 52 upward in the vertical direction with the same thrust, so that the lever 531 can be within the height range of the bottom of the connecting ring 92. The third push rod 52 can drive the lever 531 radially closer to the bottom of the connecting ring 92, so that the lever 531 is close to the bottom of the connecting ring 92. The fourth push rod 53 is a miniature servo electric push rod with adjustable thrust (with a smaller push stroke and adjustable thrust function compared to the second lifting frame 51 and the third push rod 52). The fourth push rod 53 can drive the lever 531 upward in the axial direction with a small stroke, and apply an upward thrust to the connecting ring 92.

[0047] Furthermore, to ensure that the axial pushing assembly 50 can accurately apply the set axial thrust to the connecting ring 92, the top surface of the lever 531 is a plane parallel to the bottom surface of the connecting ring 92, and a third pressure sensor 532 electrically connected to the fourth push rod 53 is provided on the part of the top surface of the lever 531 that can fully contact the bottom surface of the connecting ring 92. Under the premise that the thrust value of the fourth push rod 53 is set, the fourth push rod 53 can perform pushing or stopping pushing based on the pressure signal fed back by the third pressure sensor 532, so that the lever 531 can apply the set thrust to the connecting ring 92, thereby avoiding insufficient thrust causing the connecting ring 92 and the spring 91 to not loosen the threads, or excessive thrust damaging the thread structure or causing the connecting ring 92 to deform, resulting in inaccurate measurement of the thread axial looseness.

[0048] To ensure that the aforementioned projectile fixing member 321, connecting ring pusher 421, and lever 531 can apply thrust evenly to the oxygen bomb 90 and avoid stress concentration, the aforementioned first pressure sensor 322, second pressure sensor 422, and third pressure sensor 532 are preferably thin-film pressure sensors (when an external force is applied to the sensor, the elastic thin film (such as a silicon diaphragm, metal, or polymer film) deforms, causing a change in the resistance value of the strain resistor (such as a diffused silicon resistor or carbon paste) attached to the thin film. This change is converted into a voltage signal output through a Wheatstone bridge circuit, thereby reflecting the pressure magnitude). The thin-film pressure detection end is embedded or attached to the surface of the projectile fixing member 321, connecting ring pusher 421, and lever 531 on the side that contacts the oxygen bomb 90. The thin-film pressure detection end not only avoids the problem of thrust concentration but also helps to improve the pressure feedback accuracy.

[0049] Furthermore, to enable the aforementioned oxygen bomb safety performance testing system to perform a hydrostatic test on the oxygen bomb 90 and measure the diameter deformation at half the height of the bomb body 91, the aforementioned pressurization connection assembly 60 includes a gantry frame 61, a lead screw 62, and an oxygen bomb pressure head 63, all mounted on the top of the platform. Specifically, the two side columns of the gantry frame 61, which is shaped like a portal frame, are symmetrically distributed on both sides of the lifting assembly 20 (i.e., symmetrically distributed on both sides of the rotation axis of the oxygen bomb 90). The lead screw 62 passes through the axis of the gantry frame 61 axially and engages with the gantry frame 61 via a threaded transmission. A crank handle 621 is provided at the upper end of the lead screw 62, and an oxygen bomb pressure head 63 is provided at the lower end. A pressure connector 64 is provided at the lower end of the oxygen bomb pressure head 63. The pressure connector 64 can connect with the interface on the oxygen bomb cover under downward pressure. A pressure interface 641 is provided on the side of the pressure interface 641, and the pressure interface 641 and the pressure connector 64 are internally connected to form a water flow path. In use, the operator turns the crank 621 to move the lead screw 62 downward, which drives the oxygen bomb pressure head 63 to move downward and connects the pressure connector 64 with the interface on the oxygen bomb cover. Under the downward pressure of the oxygen bomb pressure head 63, the pressure connector 64 is sealed to the interface on the oxygen bomb cover.

[0050] Furthermore, the aforementioned water pressure generating component 70 includes a water tank 71, a pre-pressurization pump 72, and a water supply pipe 73. The water tank 71 is built into the bottom of the measuring platform 10 for easy movement. In this embodiment, water is used as the pressurizing medium and stored in the water tank 71. The pre-pressurization pump 72 is a lever-type booster pump, including a pump head and a pressure rod mechanism located on the top of the measuring platform 10. One end of the pump head is connected to the water supply pipe 73, which is equipped with a pressure shut-off valve 731. The other end of the water supply pipe 73 is detachably connected to the pressure interface 641. A one-way valve is provided between the pressure shut-off valve 731 and the water tank 71. A return water pipe 74 is provided on the water supply pipe 73 between the pressure shut-off valve 731 and the pressure interface 641. One end of the return water pipe 74 is connected to the water tank 71, and a pressure reducing valve 741 is provided on the return water pipe 74. The handles of both the pressure reducing valve 741 and the pressure shut-off valve 731 are located on the side of the measuring platform 10 for operation. After the pressure-pressurizing shut-off valve 731 is opened and the pressure-reducing valve 741 is closed, the pump head is continuously kept under negative or positive pressure through the pressure rod mechanism, drawing water from the water tank 71 and pumping it into the oxygen bomb 90 through the pressure-pressurizing shut-off valve 731. The safe pressure of the pre-pressurizing pump 72 is 0-40 MPa, and the pressure required for the hydrostatic test of the oxygen bomb 90 is 20 MPa ± 0.2 MPa, which can meet the technical requirements for pressurization required for the elastic deformation and permanent deformation of the oxygen bomb 90. The water supply pipe 73 is a high-pressure hose with a quick-release sealing joint, which can withstand a pressure of not less than 40 MPa; closing the pressure-pressurizing shut-off valve 731 can stop the pressurization inside the oxygen bomb 90; after opening the pressure-reducing valve 741, since the pressure inside the oxygen bomb 90 is higher than the pressure inside the water tank 71, the water inside the oxygen bomb 90 flows back through the water supply pipe 73 and the return water pipe 74 to depressurize the oxygen bomb 90.

[0051] When using the above-mentioned oxygen bomb safety performance testing system:

[0052] 1. Ensure that the stepper motor 11, lifting assembly 20, fixing assembly 30, radial pushing assembly 40, axial pushing assembly 50 and water pressure generating assembly 70 are in their initial positions or states;

[0053] 2. The online projection image measuring instrument 81 is in the detection standby state, and the oxygen bomb 90 to be detected is placed at the axis of the anti-slip part 221;

[0054] 3. After the projectile fixing member 321 is driven by the first push rod 32 to fix the projectile 91 part with a set thrust, the second push rod 42 is activated to apply a set thrust to the radial direction of the connecting ring 92 to a preset value;

[0055] 4. Output a set of radial loosening values ​​for the oxygen bomb thread using the online projection image measuring instrument 81;

[0056] 5. Reverse the operation of the second push rod 42 to cancel the thrust, reverse the operation of the first push rod 32 to release the bomb 91, start the stepper motor 11 to drive the oxygen bomb 90 to rotate in place at a set rotation angle, preferably 45°. After reaching the set rotation angle, repeat the above steps until the rotation angle of the oxygen bomb 90 relative to the initial rotation position is not less than 180°, output multiple sets of oxygen bomb thread radial looseness values, and obtain the measured value of the thread radial looseness of the oxygen bomb 90 by calculating the average of multiple sets of oxygen bomb thread radial looseness values.

[0057] 6. Reset the oxygen bomb 90. After the first push rod 32 drives the bomb body fixing member 321 to fix the bomb body 91 part with a set thrust, the second lifting frame 51 and the third push rod 52 are activated to move the lever 531 to a position close to the bottom of the connecting ring 92. Then, the fourth push rod 53 is activated to apply the set thrust to the axial direction of the connecting ring 92.

[0058] 7. Output a set of axial loosening values ​​for the oxygen bomb thread through the online projection image measuring instrument 81;

[0059] 8. Reverse the operation of the fourth push rod 53 to cancel the thrust, reverse the operation of the first push rod 32 to release the bomb 91, start the stepper motor 11 to drive the oxygen bomb 90 to rotate in place at a set rotation angle, preferably 45°. After reaching the set rotation angle, repeat the above steps until the rotation angle of the oxygen bomb 90 relative to the initial rotation position is not less than 180°, output multiple sets of oxygen bomb thread axial looseness values, and obtain the measured value of the thread axial looseness of the oxygen bomb 90 by calculating the average of multiple sets of oxygen bomb thread axial looseness values.

[0060] 9. Reset the oxygen bomb 90 and output the initial diameter at 1 / 2 height of the bomb body through the online projection image measuring instrument 81;

[0061] 10. Operate the crank handle 621 to seal the pressure connector 64 with the oxygen bomb 90, connect the water supply pipe 73 to the pressure port 641, and pressurize the oxygen bomb 90 to 20°C using the pre-pressurization pump 72. Conduct a water pressure test;

[0062] 11. Open the pressure relief valve 741 to release pressure. After complete pressure release, output the recovered diameter at 1 / 2 height of the projectile through the online projection image measuring instrument 81. Calculate the diameter deformation at 1 / 2 height of the oxygen bomb 90 by subtracting the recovered diameter from the initial diameter.

[0063] To ensure that the displacement of the connecting ring 92 in the acquired projection image can adequately represent the level of radial or axial loosening of the connecting ring 92, the rotation angle of the oxygen bomb 90 during a single measurement of the radial or axial loosening of the thread is 180°≤w≤360°.

[0064] In one embodiment, the maximum measuring range of the Keyence TM-X5000 series online projection image measuring instrument 81, which is preferably used in this application, is no more than 120 mm. To ensure that a set of online projection image measuring instruments 81 within this measuring range can perform the above steps, the maximum outer diameter of the oxygen bomb 90 to be measured should not exceed 120 mm, so as to ensure that the projection range of the online projection image measuring instrument 81 can cover the maximum width of the orthographic projection profile of the oxygen bomb 90. Within this measuring range, it is only necessary to control the in-situ rotation angle of the oxygen bomb 90 to be no less than 180°, so that both the front and rear views of the oxygen bomb 90 are projected within the projection coverage area.

[0065] In another embodiment, to ensure that the mounted online projection image measuring instrument 81 can detect the radial looseness or axial looseness of the thread of the oxygen bomb 90 with a maximum outer diameter exceeding 120 mm (such as the oxygen bomb 90 with an outer diameter of 123 mm in GB9706.1-2020), a scheme is adopted to build two sets of online image projection measuring instruments in parallel in the horizontal plane, so that the sum of the projection range of the two sets of online image projection measuring instruments can cover the maximum width of the orthographic projection profile of the oxygen bomb 90. In this embodiment, controlling the oxygen bomb 90 to rotate in place to 180° can also make both the front and rear views of the oxygen bomb 90 projected within the projection coverage area.

[0066] In another embodiment different from the two above, if only one set of online projection image measuring instruments 81 can be built due to cost or other conditions, and the measurement range of the online projection image measuring instrument 81 is insufficient to cover the maximum width of the orthographic projection profile of the oxygen bomb 90, the oxygen bomb 90 can be offset by placing one side of the orthographic projection profile of the oxygen bomb 90 (the "side" refers to the side containing the connecting ring 92 and the bomb body 91) within the calibration range of the online projection image measuring instrument 81, and controlling the oxygen bomb 90 to rotate in place to 360°, so as to ensure that the online projection image measuring instrument 81 can output the radial looseness or axial looseness of any measurement point on the circumferential profile of the connecting ring 92.

[0067] Obviously, the above embodiments of this application are merely examples for clearly illustrating this application, and are not intended to limit the implementation of this application. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A safety performance testing system for oxygen bombs, characterized in that: The device includes a measuring platform with a stepper motor on its top for driving the oxygen bomb to rotate; a lifting assembly located at the drive end of the stepper motor and rotatably connected to the measuring platform for adjusting the height of the oxygen bomb; a fixing assembly located on the top of the measuring platform for fixing the oxygen bomb body; a radial pushing assembly located on the top of the measuring platform and on one side of the lifting assembly for radially pushing the connecting ring of the oxygen bomb; an axial pushing assembly located on the top of the measuring platform and on one side of the lifting assembly for axially pushing the connecting ring of the oxygen bomb; a water pressure generating assembly for providing liquid pressure to the oxygen bomb; and a pressurizing connection assembly located on the top of the measuring platform for sealing the water pressure generating assembly to the oxygen bomb. And a deformation micro-detection component, including at least one pair of online projection image measuring instruments, wherein the pair of online projection image measuring instruments are disposed on the top of the measuring platform and symmetrically distributed on both sides of the lifting component.

2. The oxygen bomb safety performance testing system as described in claim 1, characterized in that: The projection direction of the online projection image measuring instrument is perpendicular to the direction in which the radial pushing component pushes the connecting ring of the oxygen bomb.

3. The oxygen bomb safety performance testing system as described in claim 1, characterized in that: The lifting assembly includes a lifting platform and a connecting base. The connecting base has a cylindrical structure and is rotatably connected to the measuring platform. The drive shaft of the stepper motor is coaxially connected to the connecting base. A drive motor is installed inside the connecting base. The lifting platform and the side wall of the connecting base are in sliding frictional engagement. The drive shaft of the drive motor is in drive engagement with the lifting platform through a threaded structure. The drive motor is used to drive the lifting platform to move vertically.

4. The oxygen bomb safety performance testing system as described in claim 3, characterized in that: The top of the lifting platform is equipped with an anti-slip section.

5. The oxygen bomb safety performance testing system as described in claim 4, characterized in that: The anti-slip part includes a rubber anti-slip coating fixed to the top of the lifting platform or a vacuum suction cup coaxially fixed to the top of the lifting platform.

6. The oxygen bomb safety performance testing system as described in claim 1, characterized in that: The fixing component includes at least one pair of brackets, any pair of brackets being disposed on the top of the measuring platform and symmetrically distributed on both sides of the lifting component; a first push rod is disposed at the top of the bracket, and a projectile fixing component is disposed at the output end of the first push rod, the first push rod being used to synchronously drive the projectile fixing component to move radially; a first pressure sensor is disposed on one side of the projectile fixing component, the first pressure sensor being electrically connected to the first push rod.

7. The oxygen bomb safety performance testing system as described in claim 1, characterized in that: The radial pushing assembly includes a first lifting frame, which is disposed on the top of the measuring platform and located on one side of the lifting assembly. The output end of the first lifting frame is provided with a second push rod, and the output end of the second push rod is provided with a connecting ring pusher. The first lifting frame is used to drive the second push rod to move axially, and the second push rod is used to drive the connecting ring pusher to move radially. A second pressure sensor is disposed on one side of the connecting ring pusher, and the second pressure sensor is electrically connected to the second push rod.

8. The oxygen bomb safety performance testing system as described in claim 1, characterized in that: The axial pushing assembly includes at least one pair of second lifting frames. Any pair of second lifting frames is disposed on the top of the measuring platform and symmetrically distributed on both sides of the lifting assembly. A third push rod is disposed at the output end of the second lifting frame, a fourth push rod is disposed at the output end of the third push rod, and a lever is disposed at the output end of the fourth push rod. The second lifting frame is used to drive the third push rod to move axially, the third push rod is used to drive the fourth push rod to move radially, and the fourth push rod is used to drive the lever to move axially. A third pressure sensor is disposed at the top end of the lever, and the third pressure sensor is electrically connected to the fourth push rod.

9. The oxygen bomb safety performance testing system as described in claim 1, characterized in that: The pressurization connection assembly includes a gantry frame, a lead screw, and an oxygen bomb pressure head disposed on the top of the measuring platform. The gantry frame is symmetrically distributed on both sides of the lifting assembly. The lead screw is threadedly driven into the gantry frame along the axial direction. The oxygen bomb pressure head is disposed at the lower end of the lead screw. A pressure connector is disposed at the lower end of the oxygen bomb pressure head. A pressure interface is disposed on the side of the oxygen bomb pressure head. The pressure connector is connected to the pressure interface.

10. The oxygen bomb safety performance testing system as described in claim 9, characterized in that: The water pressure generating assembly includes a water tank, a pre-pressurization pump, and a water supply pipe. The pre-pressurization pump is connected to the water tank. One end of the water supply pipe is connected to the pre-pressurization pump, and the other end is connected to the pressure interface. A pressure-boosting shut-off valve and a return water pipe are spaced apart on the water supply pipe. The two ends of the return water pipe are connected to the water supply pipe and the water tank, respectively. A pressure-reducing valve is installed on the return water pipe.

Images