A device for detecting the combustion and pressure release of fireworks and firecracker propellant

Abstract

The present invention discloses a device for detecting the combustion and decompression of propellant for fireworks and firecrackers, comprising a base, a force sensor, a launch tube, and a detection platform. The force sensor is disposed on the base, the detection platform is disposed above the force sensor, the side wall of the launch tube is provided with a lead hole, the bottom of the launch tube is provided with a convex eave, the detection platform is provided with a groove embedded in the convex eave, a cover is disposed above the groove, the cover is provided with a strip hole, the diameter of one end of the strip hole is the same as the outer diameter of the launch tube, and the diameter of the other end is the same as the outer diameter of the convex eave. The present invention provides a device for detecting the combustion and decompression of propellant for fireworks and firecrackers, wherein the propellant is placed in the launch tube, ignited, and force is measured. The device is simple to operate, safe and reliable, and has low cost. Furthermore, detection by the force sensor can effectively reduce subjective errors and errors caused by the external wind environment.

Description

Technical Field

[0001] The present invention relates to the technical field of fireworks and firecrackers detection, in particular to a fireworks and firecrackers propellant combustion pressure release pressure detection device. Background Art

[0002] Propellant is the most widely used and crucial raw material in fireworks. Major products within the industry, such as combination fireworks, display shells, spray flowers, small fireworks, and beads, all require significant quantities of propellant. The release pressure during the propellant combustion process is closely linked to the quality testing of the fireworks' firing performance, and the quality and safety of this performance is in turn closely linked to the personal safety of consumers. Manufacturers typically test the release pressure of propellant combustion independently, typically by simulating firing iron rods at long and short distances. This results in inaccurate and dangerous data. Military black powder testing methods include the lead plunger method, ballistic pendulum method, and metal sheet method. However, these methods require expensive and bulky equipment, require extensive testing areas, have strict operating requirements, and are complex to operate. Therefore, there is an urgent need for a testing method and device suitable for the industry that is scientifically accurate, simple to operate, safe, reliable, and cost-effective. Summary of the Invention

[0003] In response to the above-mentioned existing technology, the present invention provides a fireworks and firecracker propellant combustion release pressure detection device, which places the propellant into a launch tube, ignites it, and performs force measurement. The device is easy to operate, safe and reliable, and has low cost. Detection through a force sensor can effectively reduce subjective errors and errors caused by the external wind environment.

[0004] The technical solution of the present invention is achieved as follows:

[0005] A device for detecting the combustion and decompression of propellant for fireworks and firecrackers comprises a base, a force sensor, a launch tube and a detection platform, wherein the force sensor is arranged on the base, the detection platform is arranged above the force sensor, the side wall of the launch tube is provided with a lead wire outlet hole, the bottom of the launch tube is provided with a convex eaves, the detection platform is provided with a groove embedded in the convex eaves, a cover plate is provided above the groove, the cover plate is provided with a strip hole, the diameter of one end of the strip hole is the same as the outer diameter of the launch tube, and the diameter of the other end is the same as the outer diameter of the convex eaves.

[0006] Furthermore, positioning holes are provided around the cover plate, positioning screw holes are provided on the detection platform, and bolts are provided around the cover plate. The bolts pass through the positioning holes and are connected to the positioning screw holes.

[0007] Furthermore, an igniter is provided on the test bench, and the igniter and the force sensor are connected to a control box by signal, and the control box is connected to a display and an operation panel by signal.

[0008] Furthermore, the testing platform is provided with a level, and the base is provided with adjustable supporting legs.

[0009] Furthermore, the force sensor is a balanced beam pressure sensor.

[0010] Furthermore, the adjustable support leg includes an adjustment mechanism and a support leg, the adjustment mechanism includes a gravity pendulum, a paddle, a transmission mechanism and a limit tooth, the upper part of the gravity pendulum is connected to the base through a universal joint, the four paddles are arranged around the gravity pendulum and form a square, when the base is in a horizontal natural state, the paddles are tangent to the gravity pendulum, the support leg is threadedly connected to the base, the three support legs are evenly distributed on a circumference centered on the gravity pendulum, the first support leg is located on the mid-vertical line of the first paddle, the first support leg and the second support leg are provided with a limit tooth groove, the limit tooth is slidably connected to the base, the first paddle and the paddle on the opposite side are connected to the limit tooth at the first support leg through the transmission mechanism, the paddle adjacent to the first paddle is connected to the limit tooth at the second support leg through the transmission mechanism; when the gravity pendulum pushes the paddle, the paddle drives the limit tooth to disengage from the limit tooth groove through the transmission mechanism.

[0011] Furthermore, the paddle is slidably connected to the base, and the transmission mechanism includes a first hydraulic cylinder, a hydraulic pipe and a second hydraulic cylinder. The piston rod of the first hydraulic cylinder is connected to the paddle, the piston rod of the second hydraulic cylinder is connected to the limit block, and the first hydraulic cylinder is connected to the second hydraulic cylinder through a hydraulic pipe.

[0012] Furthermore, the gravity pendulum is a swing rod, and a counterweight block is connected to the bottom of the swing rod.

[0013] Furthermore, the base is provided with a spring, and the spring is connected to the paddle.

[0014] The beneficial effects of the present invention are:

[0015] During the experiment, the base is placed on a horizontal table, the propellant is placed in the launch tube, and a lead wire is led out from the launch tube. The launch tube is passed through the end with the larger diameter of the strip hole, then slid toward the end with the smaller diameter, and placed into the groove of the test bench. The inner diameter of the end with the smaller diameter of the strip hole is smaller than the outer diameter of the convex eave, and the end with the smaller diameter of the strip hole is used to clamp the convex eave of the launch tube, thereby securing the launch tube. After the lead wire is ignited, the lead wire ignites the gunpowder in the launch tube. After the propellant ignites and releases pressure, a downward force is applied to the launch tube. This force acts on the force sensor through the test bench and is detected by the force sensor. The measured force is used to determine the release pressure of the propellant combustion. The present invention does not require a launch iron rod during the detection process, making the detection process safer and more reliable. The present invention has a simple structure and can effectively reduce the cost of firework and firecracker release pressure testing for manufacturers in the industry. The present invention has the technical advantages of being easy to operate, safe, reliable, and low-cost. In addition, the use of a force sensor for detection can effectively reduce subjective errors and errors caused by external wind conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a structural diagram of a fireworks and firecracker propellant combustion pressure release pressure detection device according to embodiment 1 of the present invention;

[0018] Figure 2 This is a three-dimensional diagram of the cover plate of Example 1 of the present invention;

[0019] Figure 3 This is a structural diagram of a fireworks and firecracker propellant combustion pressure release pressure detection device according to embodiment 2 of the present invention;

[0020] Figure 4 This is a bottom-up structural diagram of a fireworks and firecracker propellant combustion pressure release pressure detection device according to embodiment 2 of the present invention;

[0021] In the figure, 1 is a base, 3 is a force sensor, 4 is a launching tube, 5 is a testing platform, 6 is a lead-through hole, 7 is a convex eave, 8 is a groove, 9 is a cover plate, 10 is a strip hole, 11 is a positioning hole, 12 is a positioning screw hole, 13 is a bolt, 14 is an igniter, 15 is an adjustable support leg, 16 is a gravity pendulum, 17 is a paddle, 18 is a transmission mechanism, 19 is a limit tooth, 20 is a universal joint, 22 is a limit tooth groove, 23 is a first hydraulic cylinder, 24 is a hydraulic pipe, 25 is a second hydraulic cylinder, 26 is a counterweight, 27 is a swing rod, and 28 is a spring. DETAILED DESCRIPTION

[0022] In order to better understand the technical content of the present invention, specific embodiments are provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0023] Example 1

[0024] Referring to the figure, a device for detecting the combustion and release pressure of propellant for fireworks and firecrackers comprises a base 1, a force sensor 3, a launch tube 4, and a testing platform 5. The force sensor 3 is mounted on the base 1, and the testing platform 5 is positioned above the force sensor 3. The sidewall of the launch tube 4 is provided with a lead wire hole 6, and the bottom of the launch tube 4 is provided with a convex 7. The testing platform 5 is provided with a groove 8 that fits into the convex 7. A cover plate 9 is positioned above the groove 8, and the cover plate 9 is provided with a strip hole 10. The diameter of one end of the strip hole 10 is the same as the outer diameter of the launch tube 4, and the diameter of the other end is the same as the outer diameter of the convex 7. When conducting an experiment, the base 1 is placed on a horizontal surface, the propellant is placed into the launch tube 4, and a lead wire is led out of the generating tube. The launch tube 4 is passed through the end with the larger diameter of the strip hole 10, then slid to the end with the smaller diameter, and the launch tube 4 is placed into the groove 8 of the testing platform 5. The inner diameter of the end with the smaller diameter of the strip hole 10 is smaller than the outer diameter of the convex eave 7. The end with the smaller diameter of the strip hole 10 is used to clamp the convex eave 7 of the launch tube 4, thereby fixing the launch tube 4. After the fuse is ignited, the fuse ignites the gunpowder in the launch tube 4. When the propellant is ignited and the pressure is released, a downward force is generated on the launch tube 4. The force acts on the force sensor 3 through the detection table 5 and is detected by the force sensor 3. The measured force is used to determine the release pressure of the propellant combustion. The present invention does not require a launching iron column during the detection process, and the detection process is safer and more reliable. The present invention has a simple structure and can effectively reduce the cost of pressure release detection for fireworks and firecrackers by manufacturers in the industry.

[0025] Specifically, the cover plate 9 is provided with positioning holes 11 around it, and the test platform 5 is provided with positioning screw holes 12. Bolts 13 are provided around the cover plate 9, and the bolts 13 are passed through the positioning holes 11 and then connected to the positioning screw holes 12. The screws are passed through the positioning holes 11 and tightened onto the cover plate 9, thereby firmly fixing the cover plate 9 to the test platform 5 and the launch tube 4. To disassemble the launch tube 4, the bolts 13 are loosened, and the launch tube 4 is then removed from the end of the strip hole 10 with the larger diameter.

[0026] Specifically, an igniter 14 is provided on the test bench 5. The igniter 14 and the force sensor 3 are connected to a control box, which is connected to a display and an operation panel. The igniter 14 ignites the lead to improve safety.

[0027] Specifically, the test platform 5 is provided with a level, and the base 1 is provided with adjustable support legs 15. The level is used to detect the horizontal state of the test platform 5. When the test platform 5 is not in a horizontal state, the adjustable support legs 15 on the base 1 are used to adjust the level.

[0028] Specifically, the force sensor 3 is a balanced beam pressure sensor, which has the advantages of high precision, wide measuring range, long life, simple structure, etc.

[0029] Example 2

[0030] See also Figures 3-4 , the difference between this embodiment and embodiment 1 is that the adjustable support leg 15 includes an adjustment mechanism and a support leg, the adjustment mechanism includes a gravity pendulum 16, a paddle 17, a transmission mechanism 18 and a limit tooth 19, the upper part of the gravity pendulum 16 is connected to the base 1 through a universal joint 20, four paddles 17 are arranged around the gravity pendulum 16 and form a square, when the base 1 is in a horizontal natural state, the paddle 17 is tangent to the gravity pendulum 16, the support leg is threadedly connected to the base 1, and the three support legs are evenly distributed on the circumference of the gravity pendulum 16 as the center, and the first support leg is located at On the mid-vertical line of the first paddle 17, the first supporting leg and the second supporting leg are provided with a limiting tooth groove 22, and the limiting tooth 19 is slidably connected to the base 1. The first paddle 17 and the paddle 17 on the opposite side are connected to the limiting tooth 19 at the first supporting leg through the transmission mechanism 18, and the paddle 17 adjacent to the first paddle 17 is connected to the limiting tooth 19 at the second supporting leg through the transmission mechanism 18; when the gravity pendulum 16 pushes the paddle 17, the paddle 17 drives the limiting tooth 19 to disengage from the limiting tooth groove 22 through the transmission mechanism 18.

[0031] The base 1 and the testing platform 5 are parallel. When the base 1 is in a waterborne position, the testing platform 5 is also horizontal. The upper portion of the gravity pendulum 16 is connected to the base 1 via a universal joint 20. Under the action of gravity, the gravity pendulum 16 of the adjustment mechanism always points vertically downward. Four paddles 17 are arranged around the gravity pendulum 16, forming a square. When the base 1 is horizontal, the gravity pendulum 16 is tangential to the paddles 17. When the base 1 is tilted from the horizontal plane, the gravity pendulum 16 squeezes the paddles 17. The paddles 17 are connected to the limit teeth 19 via a transmission mechanism 18. When the paddles 17 swing, the limit teeth 19 move. The three support legs are all threadedly connected to the base 1. The height of the support legs can be adjusted by rotating the support legs. Two of the support legs are equipped with limit teeth 22, which cooperate with the limit teeth 19. When the limit teeth 19 are inserted into the support legs, they prevent the support legs from rotating, thereby fixing the support legs' height. When the limiting tooth 19 is not driven, it is inserted into the limiting tooth groove 22. When the paddle 17 is squeezed, the transmission mechanism 18 drives the limiting tooth 19 to move out of the limiting tooth groove 22. When the base 1 is tilted, the gravity pendulum 16 will squeeze one or two paddles 17. The three support legs are evenly distributed on a circumference centered on the gravity pendulum 16. The first support leg is located on the mid-perpendicular line of the first paddle 17. The first paddle 17 and the paddle 17 on its opposite side are connected to the limiting tooth 19 on the first support leg via the transmission mechanism 18. When the base 1 is tilted and only the first paddle 17 is squeezed, the paddle 17 releases the limiting effect of the limiting tooth 19 on the support leg through the transmission mechanism 18, while the other support legs are stuck by the limiting tooth 19 and cannot rotate. When the first support leg is rotated until it cannot rotate, the base 1 is in a horizontal state. The paddle 17 adjacent to the first paddle 17 is connected to the limiting tooth 19 at the second support leg through the transmission mechanism 18. When the base 1 is tilted and only the first paddle 17 and the paddle 17 adjacent to the first paddle 17 are squeezed, the first support leg and the second support leg can both rotate. At this time, the second support leg is rotated first. When the second support leg is rotated, one end of the base 1 rises until the base 1 is in a state of tilting toward the first support leg. At this time, only the first paddle 17 is squeezed. When the second support leg cannot be rotated, the first support leg is rotated. When both support legs cannot be rotated, the base 1 is in a horizontal state. When adjusting the level, the present invention only needs to adjust the second support leg and the first support in sequence until they cannot be adjusted, and the level adjustment can be completed. The operation is convenient and efficient.

[0032] Specifically, the paddle 17 is slidably connected to the base 1. The transmission mechanism 18 includes a first hydraulic cylinder 23, a hydraulic pipe 24, and a second hydraulic cylinder 25. The piston rod of the first hydraulic cylinder 23 is connected to the paddle 17, and the piston rod of the second hydraulic cylinder 25 is connected to the limit block. The first hydraulic cylinder 23 and the second hydraulic cylinder 25 are connected via the hydraulic pipe 24. The cylinder bodies of the first hydraulic cylinder 23 and the second hydraulic rod are fixed to the base 1. The piston rod of the first hydraulic cylinder 23 is connected to the paddle 17. When the paddle 17 is squeezed, it drives the piston rod of the first hydraulic cylinder 23 to squeeze hydraulic oil into the second hydraulic cylinder 25, thereby driving the piston rod of the second hydraulic cylinder 25 to move outward, pushing the limit tooth 19 to move away from the limit tooth groove 22 of the support leg. Two paddles 17 on opposite sides drive the same limiting tooth 19 to move through the transmission mechanism 18. For example, when the first paddle 17 is squeezed, the limiting tooth 19 of the first supporting leg is driven to move through the transmission mechanism 18. When the paddle 17 on the opposite side of the first paddle 17 is squeezed, the limiting tooth 19 of the first supporting leg is also driven to move through the transmission mechanism 18. The two paddles 17 can act separately.

[0033] Specifically, the gravity pendulum 16 is a swing rod 27, and a counterweight 26 is connected to the bottom of the swing rod 27. The swing rod 27 is cylindrical, which is convenient for squeezing and pushing the paddle 17 to move. The counterweight 26 increases the weight of the gravity pendulum 16 and increases the strength of the swing.

[0034] Specifically, the base 1 is provided with a spring 28, and the spring 28 is connected to the paddle 17. Under the action of the spring 28, the paddle 17 can be driven to reset.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for detecting the combustion pressure release of fireworks and firecracker propellant, characterized in that: The device comprises a base, a force sensor, a launch tube and a detection platform, wherein the force sensor is arranged on the base, the detection platform is arranged above the force sensor, the side wall of the launch tube is provided with a lead-through hole, the bottom of the launch tube is provided with a convex eaves, the detection platform is provided with a groove embedded in the convex eaves, a cover plate is provided above the groove, the cover plate is provided with a strip hole, the diameter of one end of the strip hole is the same as the outer diameter of the launch tube, and the diameter of the other end is the same as the outer diameter of the convex eaves, the detection platform is provided with a spirit level, the base is provided with adjustable support legs, the adjustable support legs include an adjustment mechanism and support legs, the adjustment mechanism includes a gravity pendulum, a paddle, a transmission mechanism and a limit tooth, the upper part of the gravity pendulum is connected to the base through a universal joint, and the four paddles are provided on the gravity pendulum The four sides are surrounded by a square, and when the base is in a horizontal natural state, the paddle is tangent to the gravity pendulum, the support legs are threadedly connected to the base, and the three support legs are evenly distributed on a circumference centered on the gravity pendulum. The first support leg is located on the mid-vertical line of the first paddle, and the first support leg and the second support leg are provided with limiting tooth grooves, and the limiting teeth are slidably connected to the base. The first paddle and the paddle on the opposite side are connected to the limiting teeth at the first support leg through the transmission mechanism, and the paddle adjacent to the first paddle is connected to the limiting teeth at the second support leg through the transmission mechanism; when the gravity pendulum pushes the paddle, the paddle drives the limiting teeth to disengage from the limiting tooth groove through the transmission mechanism.

2. A fireworks and firecracker propellant combustion pressure release detection device according to claim 1, characterized in that: Positioning holes are provided around the cover plate, positioning screw holes are provided on the detection platform, and bolts are provided around the cover plate. The bolts pass through the positioning holes and are connected with the positioning screw holes.

3. The device for detecting the combustion pressure release of fireworks and firecracker propellant according to claim 1, characterized in that: An igniter is provided on the testing platform. The igniter and the force sensor are connected to a control box by signal. The control box is connected to a display and an operation panel by signal.

4. The device for detecting the combustion pressure release of fireworks and firecracker propellant according to claim 1, characterized in that: The force sensor is a balanced beam pressure sensor.

5. The device for detecting the combustion pressure release of fireworks and firecracker propellant according to claim 1, characterized in that: The paddle is slidably connected to the base, and the transmission mechanism includes a first hydraulic cylinder, a hydraulic pipe, and a second hydraulic cylinder. The piston rod of the first hydraulic cylinder is connected to the paddle, the piston rod of the second hydraulic cylinder is connected to the limit block, and the first hydraulic cylinder is connected to the second hydraulic cylinder through a hydraulic pipe.

6. The device for detecting the combustion pressure release of fireworks and firecracker propellant according to claim 1, characterized in that: The gravity pendulum is a swing rod, and a counterweight block is connected to the bottom of the swing rod.

7. The device for detecting the combustion pressure release of fireworks and firecracker propellant according to claim 1, characterized in that: The base is provided with a spring, and the spring is connected to the paddle.

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