Fragile cover bursting force testing device

Abstract

The utility model relates to the technical field of fragile cover performance testing, and provides a fragile cover bursting force testing device which comprises a cylinder frame unit, an impact unit, an installation unit and a hoisting unit. The cylinder frame unit comprises a frame body and a cylinder body, and the cylinder body is arranged on the frame body; the impact unit is movably arranged in the barrel and comprises a balancing weight, an impact head and a tension and compression force transducer; the impact head and the tension and compression force measuring sensor are fixed at the bottom of the balancing weight, an electromagnet is arranged at the top of the balancing weight, and a lifting ring connected with the lifting unit is arranged at the top of the electromagnet; the mounting unit is arranged in the frame body and is positioned right below the cylinder body; and the mounting unit is used for fixing a fragile cover to be tested. The fragile cover bursting force testing device has the advantages of being simple in structure, small in size, low in cost and easy to operate.

Description

Technical Field

[0001] This application belongs to the technical field of performance testing of frangible covers. More specifically, it relates to a frangible cover bursting force testing device. Background Art

[0002] A frangible cover is a component installed at the front end of a missile launch box cover. Compared with mechanically opened and explosively opened covers, the frangible cover has a simple structure and has the advantages of light weight, high strength, high launch efficiency, strong environmental adaptability, and low maintenance cost. It has been widely used in various missile launch systems, playing a sealing role during missile storage, and at the same time being able to be burst and split and thrown out during missile launch without damaging components such as radomes. Therefore, during research, development, design, and manufacturing, strict structural mechanics design and test verification are required for frangible covers.

[0003] Therefore, there is an urgent need for a frangible cover bursting force testing device to test the bursting force when the frangible cover is burst and split. Summary of the Utility Model

[0004] The purpose of this application is to provide a frangible cover bursting force testing device, which has the advantages of simple structure, small size, low cost, and simple operation.

[0005] To achieve the above purpose, the technical solution adopted in this application is: to provide a frangible cover bursting force testing device, including: a cylinder frame unit, an impact unit, a mounting unit, and a lifting unit;

[0006] The cylinder frame unit includes a frame body and a cylinder body, and the cylinder body is arranged on the frame body;

[0007] The impact unit is movably arranged in the cylinder body, and the impact unit includes: a counterweight, an impact head, and a tension and compression force sensor; the impact head and the tension and compression force sensor are fixed to the bottom of the counterweight, an electromagnet is arranged on the top of the counterweight, and a lifting ring connected to the lifting unit is arranged on the top of the electromagnet;

[0008] The mounting unit is arranged in the frame body and directly below the cylinder body, and the mounting unit fixes the frangible cover to be tested.

[0009] In one embodiment, a vertical window is provided on the side wall of the cylinder body, and a scale is provided on the side of the vertical window.

[0010] In one embodiment, a groove is provided on the top of the counterweight, and the shape of the groove is adapted to the electromagnet.

[0011] In one embodiment, a flange ring protrudes from the lower end of the counterweight, a support flange is provided at the lower end of the cylinder body, through holes are provided on the support flange, and the diameter of the through holes is larger than the diameter of the impact head and smaller than the outer diameter of the flange ring.

[0012] In one embodiment, the tension and compression force sensor is fixed on the counterweight by fastening screws, and the impact head is connected to the tension and compression force sensor through a conversion screw.

[0013] In one embodiment, an avoidance groove for the tension and compression force sensor to route wires is provided on the side of the counterweight.

[0014] In one embodiment, the weight of the counterweight is 10 - 40 kg, and the weight of the impact head ≤ 10 kg; the measuring range of the tension and compression force sensor is 5 - 15 times the test target value.

[0015] In one embodiment, the installation unit includes a mounting base, a conversion flange, and a compression flange; the conversion flange and the compression flange are used to clamp and fix the fragile cover.

[0016] In one embodiment, the mounting base includes a bottom plate, a support cylinder provided on the bottom plate, and a mounting flange provided on the support cylinder. The support cylinder is a hollow structure, and the mounting flange is connected to the conversion flange through bolts.

[0017] In one embodiment, the bottom plate is detachably assembled through a plurality of buckles provided at the bottom of the frame body.

[0018] The beneficial effects of the fragile cover bursting force test device provided by this application are as follows: The cylinder body simulates a missile launch tube, the impact unit makes a free-fall movement in the cylinder body, the installation unit is used to install the fragile cover to be tested. By measuring the drop height dimension of the impact unit, the impact force at the moment of impact and bursting can be obtained, and thus the impact force at the moment of impact and bursting of the fragile cover can be calculated. It has the advantages of simple structure, small size, low cost, and simple operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings 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.

[0020] Figure 1 It is a schematic three-dimensional structure diagram of the fragile cover bursting force test device provided by the embodiment of the present application;

[0021] Figure 2 The front view structural schematic diagram of the frangible cover top-breaking force testing device provided by the embodiment of the present application;

[0022] Figure 3 The sectional view structural schematic diagram of the frangible cover top-breaking force testing device provided by the embodiment of the present application;

[0023] Figure 4 The front view structural schematic diagram of the cylinder frame unit in the frangible cover top-breaking force testing device provided by the embodiment of the present application;

[0024] Figure 5 The front view structural schematic diagram of the impact unit in the frangible cover top-breaking force testing device provided by the embodiment of the present application;

[0025] Figure 6 The front view structural schematic diagram of the installation unit in the frangible cover top-breaking force testing device provided by the embodiment of the present application.

[0026] Among them, each reference numeral in the figure:

[0027] 1. Impact unit; 10. Counterweight; 11. Impact head; 12. Electromagnet; 13. Tensile and compressive force sensor; 14. Conversion screw; 2. Cylinder frame unit; 20. Cylinder body; 21. Frame body; 22. Support flange; 23. Snap; 3. Installation unit; 30. Installation seat; 301. Bottom plate; 302. Support cylinder; 303. Installation flange; 31. Conversion flange; 32. Compression flange. Detailed implementation manners

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the following further describes the present application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0032] As Figures 1-6 shown, a test device for the top-breaking force of a fragile lid provided by an embodiment of this application will now be described. The test device for the top-breaking force of a fragile lid includes an impact unit 1, a cylinder frame unit 2, a mounting unit 3, and a lifting unit (not shown in the figure).

[0033] Among them, the cylinder frame unit 2 includes a frame body 21 and a cylinder body 20. The cylinder body 20 is arranged on the frame body 21. The frame body 21 is welded by a plurality of rectangular steel pipes. Specifically, the frame body 21 includes four rectangular steel pipes at the bottom, four vertical support steel pipes, and four limit steel pipes at the top. The cylinder body 20 is a cylindrical structure. Angle steels for fixing the cylinder body 20 are respectively provided at the inner corners formed by the four limit steel pipes. The angle steels are welded together with the cylinder body 20 and the limit steel pipes. In this embodiment, a vertical window is provided on the cylinder body 20, and a scale is provided on the side of the vertical window. The scale is used to confirm the free-fall height of the impact unit 1. Among them, a flange is provided at the upper end of the cylinder body 20, so that after overlapping on the angle steel, welding is carried out. The cylinder body 20 is made of steel pipe material.

[0034] Among them, the impact unit 1 is movably arranged in the cylinder body 20, so that the cylinder body 20 has a guiding function. The impact unit 1 includes a counterweight 10, an impact head 11, and a tension and compression force sensor 13. The counterweight 10 is made of a magnetizable material such as iron. The impact head 11 and the tension and compression force sensor 13 are fixed to the bottom of the counterweight 10. An electromagnet 12 is provided at the top of the counterweight 10, and a lifting ring connected to the lifting unit is provided at the top of the electromagnet 12. The lifting unit can lift the counterweight 10, the impact head 11, and the tension and compression force sensor 13 through the lifting ring and the electromagnet 12. The impact head 11 is used to simulate the shape of a ballistic head. The tension and compression force sensor 13 is used to measure the top-breaking force of the impact head 11 hitting the fragile lid. When the electromagnet 12 is powered off, the counterweight 10 and the impact head 11 perform free-fall motion.

[0035] Among them, the mounting unit 3 is arranged in the frame body 21 and is located directly below the cylinder body 20. The mounting unit 3 fixes the fragile lid to be tested. The center of the fragile lid is aligned with the impact head 11, and when the impact head 11 falls freely, it hits the fragile lid.

[0036] Furthermore, a groove is provided at the top of the counterweight block 10. The shape of the groove is adapted to the electromagnet 12. The groove is located at the center of the configuration block and has a positioning function. The lifting unit is various existing lifting devices, and the impact unit 1 is lifted through a lifting ring. When the electromagnet 12 is powered off, the impact unit 1 can fall instantaneously.

[0037] Furthermore, the counterweight block 10 is of a cylindrical structure. A flange convex ring protrudes from the lower end of the counterweight block 10. A support flange 22 is provided at the lower end of the cylinder body 20. Through holes are provided on the support flange 22. The diameter of the through holes is larger than the diameter of the impact head 11 and smaller than the outer diameter of the flange convex ring. An elastic material is provided on the upper surface of the support flange 22. The elastic material plays a buffering role and is used to buffer the impact force after the impact is completed. The elastic material is a rubber ring, a silica gel ring or a sponge washer. The flange convex ring is used to contact the support flange 22 and is used to carry the impact unit 1 after the impact is completed. The outer diameter of the flange convex ring is slightly smaller than the inner diameter of the cylinder body 20 to facilitate free movement within the cylinder body 20.

[0038] Furthermore, the tension and compression force sensor 13 is fixed to the counterweight block 10 through fastening screws. A plurality of groups of threaded holes are provided on the bottom surface of the counterweight block 10, and corresponding sensors can be replaced according to different ranges of the tested impact force. The impact head 11 is connected to the tension and compression force sensor 13 through a conversion screw 14. Different designed impact heads 11 can also be replaced according to different bullet head shapes to truly reflect the working condition of the bullet head contacting the fragile cover at the moment of impact.

[0039] Furthermore, an avoidance groove for the wire routing of the tension and compression force sensor 13 is provided on the side surface of the counterweight block 10. The function of the avoidance groove is to prevent the wire from protruding from the side surface of the counterweight block 10 and interfering with the free fall movement of the configuration block.

[0040] Furthermore, the weight of the counterweight block 10 is 10 - 40 kg, and the weight of the impact head 11 ≤ 10 kg. The measuring range of the tension and compression force sensor 13 is 5 - 15 times the target value of the tested bursting force.

[0041] Furthermore, the installation unit 3 includes an installation seat 30, a conversion flange 31 and a pressing flange 32. The installation seat 30 is arranged on the frame body 21. The conversion flange 31 and the pressing flange 32 are used to clamp and fix the fragile cover. Specifically, the installation seat 30 includes a bottom plate 301, a support cylinder 302 arranged on the bottom plate 301, and an installation flange 303 arranged on the support cylinder 302. A circle of installation holes are provided on both the installation flange 303 and the pressing flange 32. Two circles of installation holes are provided on the conversion flange 31. The outer circle of installation holes is connected to the installation flange 303, and the inner circle of installation holes is connected to the pressing flange 32. The support cylinder 302 is of a hollow structure to reduce the weight. The installation flange 303 is connected to the conversion flange 31 through bolts.

[0042] Furthermore, a plurality of buckles 23 are provided at the bottom of the frame body 21, and the bottom plate 301 is detachably assembled through the plurality of buckles 23. Specifically, four buckles 23 are provided, which can position and limit the installation position of the bottom plate 301; while ensuring convenient disassembly and assembly, the center of the fragile cover is aligned with the impact head 11.

[0043] In this embodiment, after the fragile cover is installed on the conversion flange 31 and limited and fixed by the pressing flange 32, the installation unit 3 is placed on the frame body 21 of the barrel frame unit 2. All components of the impact unit 1 are assembled, the signal line is connected, the electromagnet 12 is powered on, the lifting unit lifts the impact unit 1, places it into the barrel frame unit 2, adjusts the height of the impact unit 1, and observes the lower edge degree of the counterweight 10 through the scale on the vertical window side at the front end of the barrel body 20 to reach the H value, then the test can be completed.

[0044] In this embodiment, a method for testing the bursting force of a fragile cover is provided, and the test operation steps are as follows:

[0045] Step 1: Determine the test parameters through the input technical data: bursting force F (N), impact speed V (m / s);

[0046] Step 2: Select the range (t) of the tension and compression sensor according to the bursting force F:

[0047] Step 3: Calculate the free fall height (m) through the input parameters:

[0048] Step 4: Install the fragile cover on the conversion flange, and place the entire installation unit with the fragile cover on the frame body of the barrel frame unit, ensuring that the lower bottom plate is snapped into the buckle.

[0049] Step 5: Assemble all components of the impact unit. Check that the signal line of the tension and compression force measuring sensor is fixed in the avoidance groove of the counterweight with soft glue. Connect the signal line and check whether the acquisition device is working properly.

[0050] Step 6: Power on the electromagnet, use the lifting unit to lift the impact unit, and place it into the barrel frame unit. Adjust the height of the impact unit, and observe the lower edge degree of the counterweight through the scale on the vertical window side at the front end of the barrel body until it reaches the H value.

[0051] Step 7: Disconnect the power supply of the electromagnet. After the impact unit freely falls and breaks the fragile cover, it rebounds multiple times and stops on the support flange.

[0052] Step 8: Read the bursting data through the acquisition device to complete the test.

[0053] Finally, analyze the test result data, compare the collected data with the target value. If it exceeds the target value range, adjust and optimize the structure or process of the frangible cover, and then repeat the test until the collected data coincides with the target value.

[0054] In this embodiment, the frangible cover bursting force test device is applicable to the frangible cover bursting force test of small launch units. The device has a simple structure, small size, low cost, and simple operation. The weight distribution of the impact unit is appropriate, and the impact test feedback is relatively sensitive, which is particularly suitable for the test of small frangible bursting force.

[0055] The frangible cover bursting force test device has a certain universality for small-sized frangible covers. It can achieve the universality of the device main body by replacing the impact head, the compression flange, and the mounting flange according to different types of launch unit projects.

[0056] The frangible cover bursting force test device uses gravity as the power source. By adjusting the height of the impact head, different impact instantaneous speeds can be obtained, and the impact force at the moment of impact and bursting can be obtained through the sensor.

[0057] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for testing the bursting force of a fragile cover, characterized in that: include: An impact unit (1), a cartridge unit (2), a mounting unit (3) and a lifting unit; The cartridge rack unit (2) comprises a rack body (21) and a cartridge body (20), wherein the cartridge body (20) is arranged on the rack body (21); The impact unit (1) is movably arranged in the cylinder (20), and comprises: a counterweight (10), an impact head (11) and a tension and compression force sensor (13); the impact head (11) and the tension and compression force sensor (13) are fixed to the bottom of the counterweight (10), an electromagnet (12) is provided on the top of the counterweight (10), and a lifting ring connected to the lifting unit is provided on the top of the electromagnet (12); The mounting unit (3) is arranged in the frame (21) and is located directly below the cylinder (20), and the mounting unit (3) fixes the fragile cover to be tested.

2. The frangible cover bursting force testing device according to claim 1, characterized in that: A vertical window is provided on the side wall of the cylinder (20), and a scale is provided on the side of the vertical window.

3. The frangible cover bursting force testing device according to claim 2, characterized in that: The top of the counterweight block (10) is provided with a groove, and the shape of the groove is adapted to the electromagnet (12).

4. The frangible cover bursting force testing device according to claim 3, characterized in that: The lower end of the counterweight (10) is provided with a flange convex ring, the lower end of the cylinder (20) is provided with a supporting flange (22), and the supporting flange (22) is provided with a through hole, the diameter of the through hole is larger than the diameter of the impact head (11) and smaller than the outer diameter of the flange convex ring.

5. The frangible cover bursting force testing device according to claim 4, characterized in that: The tension and compression force sensor (13) is fixed to the counterweight (10) via a fastening screw, and the impact head (11) is connected to the tension and compression force sensor (13) via a conversion screw (14).

6. The device for testing the breaking force of a fragile cover according to any one of claims 1 to 5, characterized in that: The side surface of the counterweight block (10) is provided with an escape groove for routing the tension and compression force sensor (13).

7. The frangible cover bursting force testing device according to claim 6, characterized in that: The weight of the counterweight block (10) is 10-40 kg, and the weight of the impact head (11) is ≤10 kg; the measuring range of the tension and compression force sensor (13) is 5-15 times the target value of the breaking force.

8. The frangible cover bursting force testing device according to claim 1, characterized in that: The mounting unit (3) comprises a mounting seat (30), a conversion flange (31) and a clamping flange (32); the conversion flange (31) and the clamping flange (32) are used to clamp and fix the fragile cover.

9. The frangible cover bursting force testing device according to claim 8, characterized in that: The mounting seat (30) comprises a base plate (301), a support tube (302) arranged on the base plate (301), and a mounting flange (303) arranged on the support tube (302); the support tube (302) is a hollow structure, and the mounting flange (303) is connected to the conversion flange (31) by bolts.

10. The frangible cover bursting force testing device according to claim 9, characterized in that: The bottom plate (301) is detachably assembled via a plurality of buckles (23) arranged at the bottom of the frame (21).

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