Falling test equipment for fireworks and crackers

Abstract

The utility model relates to firework and cracker drop test equipment which comprises a safety bin and a base installed on one side of the top of the safety bin, two parallel supporting columns are vertically installed at the two ends of the base, and cross arms are fixedly installed at the top ends of the supporting columns. A lifting plate capable of moving up and down is arranged between the two supporting columns, a connecting plate is fixedly installed on the lifting plate, two supporting rods extending towards the center of the safety bin are fixedly installed on the connecting plate, a sample tray is rotatably installed at the end of each supporting rod, two release rods are rotatably arranged between the two supporting rods, and when the release rods are parallel to the supporting rods, the sample tray is placed on the sample tray. The sample trays abut against the release rod, and after the release rod rotates, the release rod and the sample trays are separated, and a falling channel is formed between the two sample trays. The device is designed according to drop test conditions of fireworks and crackers, and is a special detection instrument for drop test of fireworks and crackers. The drop test device is simple in structure, convenient to use and low in cost, and can be used for drop test detection of various fireworks and crackers.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a fireworks and firecracker drop test device. Background Art

[0002] According to national standards, fireworks and firecrackers must undergo drop tests to ensure their safety during packaging and transportation. Current drop test equipment for fireworks and firecrackers is used by testing departments. Drop test equipment used for other products is either complex or inconvenient to use, making it unsuitable for drop testing of fireworks and firecrackers. Utility Model Content

[0003] The purpose of the utility model is to provide a fireworks and firecracker drop test device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a fireworks and firecracker drop test equipment, including a safety chamber and a release mechanism installed on the top of the safety chamber; the release mechanism includes a base fixedly installed on one side of the safety chamber, two parallel pillars are vertically installed at both ends of the base, and a cross arm is fixedly installed on the top of the pillar; a lifting plate that moves up and down is provided between the two pillars, a connecting plate is fixedly installed on the lifting plate, and two support rods extending toward the center of the safety chamber are fixedly installed on the connecting plate, a sample tray is rotatably installed at the end of each support rod, and two release rods are rotatably provided between the two support rods, when the release rod is parallel to the support, the sample tray abuts against the release rod, and when the release rod is perpendicular to the support, the release rod and the sample tray are separated and a falling channel is formed between the two sample trays.

[0005] Compared with the existing technology, this device is designed according to the drop test conditions of fireworks and firecrackers, and is a special detection instrument used for drop tests of fireworks and firecrackers. It has a simple structure, is easy to use, and has a low cost, and can be used for drop test detection of various fireworks and firecracker products.

[0006] According to the preferred technical solution of the present invention, one end of the sample tray is rotatably connected to the support rod, and the other end is a free end; when the release rod is parallel to the support, the free ends of the two sample trays are located between the two support rods and abut against the release rod.

[0007] The preferred technical solution of the utility model is that a lifting seat is installed between the two pillars, the lifting seat is fixedly installed on the base, two guide rods are installed on the lifting seat, a lifting plate is slidably installed on the two guide rods, and a lifting screw is rotatably installed between the two guide rods; a servo motor is installed in the lifting seat, and the output end of the servo motor is fixedly connected to the lifting screw; a lifting nut matching the lifting screw is installed on the lifting plate.

[0008] The preferred technical scheme of the utility model discloses, the connecting plate is fixedly installed with the release seat, the release seat is provided with the installation groove that is adapted to the release rod in, the top of release seat is installed with the support shaft, and the release rod is rotatably installed on the support shaft, one end of the release shaft is located in the installation groove and is adjacent to the connecting plate, and the other end is located outside the release seat.

[0009] The preferred technical scheme of the utility model discloses, the connecting plate is provided with the locking groove that is connected with the installation groove, the connecting plate is fixedly installed with the locking cylinder, and the locking cylinder and release seat are located at both sides of the connecting plate, and the output end of locking cylinder is fixedly installed with the locking rod that is coupled with the release rod.

[0010] The preferred technical scheme of the utility model discloses, the top of locking rod is evenly provided with a plurality of blind holes, and the top of locking rod is installed with the sealing plate in the mode of working fastener or welding, the sealing plate is provided with the through hole that is connected with the blind hole, the diameter of through hole is less than the diameter of blind hole, the blind hole is provided with the steel ball, and the top of steel ball is abutted with the top of locking groove through the through hole.

[0011] In addition to the technical problems solved by the application described above, the technical features constituting the technical scheme and the advantages brought by these technical features, other technical problems solved by the application, other technical features included in the technical scheme and the advantages brought by these technical features will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is the three-dimensional schematic diagram of the utility model.

[0013] Fig. 2 It is the plan view of the utility model.

[0014] Fig. 3 It is the sectional view of locking rod of the utility model.

[0015] The reference signs of the drawings are as follows: 01, safety bin;02, base;03, support column;04, cross arm;05, lifting seat;06, guide rod;07, lifting plate;08, lifting screw;09, servo motor;10, connecting plate;11, support rod;12, sample tray;13, release seat;14, release rod;15, installation groove;16, support shaft;17, locking groove;18, locking cylinder;19, locking rod;20, blind hole;21, sealing plate;22, through hole. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model.

[0017] Please refer to Figs. 1-3As shown, the fireworks drop test equipment of the present invention includes a safety chamber 01 for installation on or below the ground. In this application, safety chamber 01 is installed on the ground, and a release mechanism is installed on the top of safety chamber 01. During use, the operator places fireworks on the release mechanism. The release mechanism carries the fireworks to a height corresponding to the fireworks drop standard (here, the height distance is the distance between the bottom of safety chamber 01 and the fireworks guard). The release mechanism then releases the fireworks, allowing them to fall freely.

[0018] See also Figs. 1-2 As shown, the release mechanism includes a base 02 fixedly mounted on one side of a safety chamber 01. Two parallel pillars 03 are vertically mounted at each end of base 02, with a cross arm 04 fixedly mounted on the top of each pillar 03. A lifting base 05 is mounted between the two pillars 03. Lifting base 05 is fixedly mounted on base 02. Two guide rods 06 are mounted on lifting base 05, one end of each guide rod being fixed to lifting base 05 and the other end to cross arm 04. A lifting plate 07 is slidably mounted on the two guide rods 06 via linear bearings. A lifting screw 08 is positioned between the two guide rods 06. One end of lifting screw 08 is rotatably connected to cross arm 04 via a rolling bearing, while the other end of lifting screw 08 is rotatably connected to lifting base 05 via a rolling bearing and extends into lifting base 05. A lifting nut is mounted on lifting plate 07, which matches lifting screw 08. When lifting screw 08 rotates, the lifting nut and lifting screw 08 cooperate to release the lifting screw. Drive the lifting plate 07 to move up and down along the two guide rods 06. A servo motor 09 is installed in the lifting seat 05, and the output end of the servo motor 09 is fixedly connected to the lifting screw 08. When the servo motor 09 is working, it drives the lifting plate 07 to move up and down between the two pillars 03 along the two guide rods 06. Since the servo motor 09 is usually equipped with a position sensor, such as an encoder or a rotary transformer, it is used to detect the position of the motor shaft in real time. These sensors feed back the position data to the control system to achieve accurate closed-loop control. The control system receives the feedback signal of the position sensor and compares it with the preset target position (set value) to calculate the deviation (error) between the current position and the target position. Through the closed-loop control algorithm (such as proportional integral differential control, PID control), the control system continuously adjusts the operating state of the motor to ensure that the motor reaches the target position accurately. Thereby, the experimental height is accurately controlled.

[0019] The connecting plate 10 is fixedly installed on the lifting plate 07 by means of fasteners and welding, and two support rods 11 extending to the center of the safety bin 01 are fixedly installed on the connecting plate 10. The end of each support rod 11 is rotatably installed with a sample tray 12. One end of the sample tray 12 is rotatably connected with the support rod 11, and the other end is a free end. When the two sample trays 12 are horizontally arranged between the two support rods 11 (the free ends of the two sample trays 12 are located between the two support rods 11), a flat storage table is formed, and the operator places fireworks and crackers on the storage table.

[0020] The release seat 13 is fixedly installed on the connecting plate 10 by welding or fasteners, and two release rods 14 are rotatably installed on the release seat 13. When the two release rods 14 are horizontal with the two support rods 11, the free end of the sample tray 12 abuts against the end of the release rod 14 to form a supporting force to prevent the sample tray 12 from rotating. Thus, a flat storage table is formed, and the operator places fireworks and crackers on the storage table of the two sample trays 12.

[0021] When the release rod 14 rotates, the release rod 14 and the sample tray 12 are separated, and the supporting force on the sample tray 12 disappears. The sample tray 12 rotates around the support rod 11, the free end of the sample tray 12 is vertically downward, and a falling channel is formed between the two sample trays 12. The fireworks and crackers placed on the sample tray 12 fall from the falling channel between the two sample trays 12 to the bottom of the safety bin 01.

[0022] The release seat 13 is provided with a mounting groove 15 matched with the release rod 14, the top of the release seat 13 is provided with a support shaft 16, and the release rod 14 is provided with a through hole matched with the support shaft 16. During assembly, the release rod 14 is placed in the mounting groove 15, and then the support shaft 16 is passed through, so that the release rod 14 rotates on the support shaft 16, one end of the release shaft is located in the mounting groove 15 and adjacent to the connecting plate 10, and the other end is located outside the release seat 13 and coupled with the sample tray 12.

[0023] The connecting plate 10 is provided with a locking groove 17 connected with the mounting groove 15, and the locking cylinder 18 is fixedly installed on the connecting plate 10. The locking cylinder 18 is located on both sides of the connecting plate 10. The output end of the locking cylinder 18 is fixedly installed with a locking rod 19 coupled with the release rod 14. When the output end of the locking cylinder 18 is extended, the locking rod 19 extends from the locking groove 17 and abuts against the end of the release rod 14 located in the mounting groove 15, and is located above the release rod 14. The release rod 14 is parallel to the two support rods 11, and the sample tray 12 is provided with a supporting force.

[0024] When the output end of the locking cylinder 18 is retracted, the locking plate is separated from the end of the release lever 14, the locking lever 19 rotates under the action of gravity, the release lever 14 is separated from the sample tray 12. The support force on the sample tray 12 disappears, the sample tray 12 rotates around the support rod 11, and the fireworks and firecrackers placed on the sample tray 12 fall off between the sample trays 12.

[0025] By the arrangement of the locking groove 17, when the output end of the locking cylinder 18 is extended, the bottom surface of the locking lever 19 and the release lever 14 abut, and the top surface of the locking lever 19 abuts against the top surface of the locking groove 17. After the fireworks and firecrackers are placed on the sample tray, since the release lever 14 is rotatably installed on the release seat 13 through the support shaft 16, according to the principle of the lever, it can be known that the upward force generated by the end of the release lever 14 close to the connecting plate 10 is much greater than the weight of the fireworks and firecrackers, so the top surface of the locking plate and the top surface of the locking groove 17 abut, and part of the force generated by the end of the release lever 14 is dispersed to the connecting plate 10. The other part is dispersed by the locking cylinder 18. In this way, the service life of the locking cylinder 18 can be prolonged.

[0026] Please refer to Fig. 3 As shown in the drawings, in order to realize the sliding connection between the locking lever 19 and the connecting plate 10, a plurality of blind holes 20 are uniformly distributed on the top surface of the locking lever 19, the top surface of the locking lever 19 is provided with a sealing plate 21 by means of fastening or welding, the sealing plate 21 is provided with a penetrating hole 22 which is in through connection with the blind hole 20, the diameter of the penetrating hole 22 is smaller than that of the blind hole 20, a steel ball is arranged in the blind hole 20, and the top of the steel ball abuts against the top of the locking groove 17 through the penetrating hole 22. When the locking lever 19 moves, the sliding connection between the locking lever 19 and the connecting plate 10 is realized.

[0027] In use, first, an operator rotates the release lever 14, so that the included angle between the release lever 14 and the support 03 is less than or equal to one hundred and eighty degrees. Then, the output end of the locking cylinder 18 is extended, so that the locking lever 19 abuts against the end of the release lever 14. When the operator releases the release lever 14, the release lever 14 and the support rod 11 are ensured to be in a parallel state. Then, the sample tray 12 is rotated, so that the free end of the sample tray 12 is located between the two supports and abuts against the release lever 14. Then, the fireworks and firecrackers are placed on the sample tray 12. Then, the servo motor 09 is started, drives the lifting plate 07 to move upwards, and lifts the fireworks and firecrackers to a set height. When the set height is reached, the output end of the locking cylinder 18 is retracted, so that the locking lever 19 is separated from the locking lever, and the release lever 14 rotates around the support shaft 16 under the action of gravity, so that the release lever 14 is separated from the sample tray 12. The sample tray 12 rotates, the free end of the sample tray 12 is vertically downward, and a falling channel is formed between the two sample trays 12. The fireworks and firecrackers placed on the sample tray 12 do free fall motion through the falling channel.

[0028] If the embodiments of the utility model involve directionality indication (such as up, down, left, right, front, back...), the directionality indication is only used to explain the relative position relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), if the specific posture changes, then the directionality indication also changes accordingly.

[0029] The above embodiment only describes the preferred embodiment of the utility model, and does not limit the scope of the utility model, and various deformations and improvements of the technical scheme of the utility model made by the ordinary engineering technicians in the art without departing from the design spirit of the utility model should fall within the protection scope determined by the claims of the utility model.

Claims

1. A fireworks and firecracker drop test device, characterized in that: It includes a safety bin and a release mechanism installed on the top of the safety bin; the release mechanism includes a base fixedly installed on one side of the safety bin, two parallel pillars are vertically installed at both ends of the base, and a crossbar is fixedly installed on the top of the pillar; a lifting plate that moves up and down is provided between the two pillars, a connecting plate is fixedly installed on the lifting plate, and two support rods extending toward the center of the safety bin are fixedly installed on the connecting plate, a sample tray is rotatably installed at the end of each support rod, and two release rods are rotatably provided between the two support rods, when the release rod is parallel to the support, the sample tray abuts against the release rod, and when the release rod is perpendicular to the support, the release rod and the sample tray are separated and a falling channel is formed between the two sample trays.

2. The fireworks drop test equipment according to claim 1, characterized in that: One end of the sample tray is rotatably connected to the support rod, and the other end is a free end; when the release rod is parallel to the support, the free ends of the two sample trays are located between the two support rods and abut against the release rod.

3. The fireworks drop test equipment according to claim 1, characterized in that: A lifting seat is installed between the two pillars, and the lifting seat is fixedly installed on the base. Two guide rods are installed on the lifting seat, and a lifting plate is slidably installed on the two guide rods. A lifting screw is rotatably installed between the two guide rods; a servo motor is installed in the lifting seat, and the output end of the servo motor is fixedly connected to the lifting screw; a lifting nut matching the lifting screw is installed on the lifting plate.

4. The fireworks drop test equipment according to claim 3, characterized in that: A release seat is fixedly installed on the connecting plate, and a mounting groove adapted to the release rod is provided in the release seat. A support shaft is installed on the top of the release seat, and the release rod is rotatably installed on the support shaft; one end of the release shaft is located in the mounting groove and adjacent to the connecting plate; the other end is located outside the release seat.

5. The fireworks drop test equipment according to claim 4, characterized in that: A locking groove that is connected to the mounting groove is provided on the connecting plate, and a locking cylinder is fixedly installed on the connecting plate. The locking cylinder and the release seat are located on both sides of the connecting plate; a locking rod coupled to the release rod is fixedly installed on the output end of the locking cylinder.

6. The fireworks drop test equipment according to claim 5, characterized in that: There are several blind holes evenly distributed on the top surface of the locking rod. A sealing plate is installed on the top surface of the locking rod by working fasteners or welding. The sealing plate is provided with an insertion hole that is connected to the blind hole. The diameter of the insertion hole is smaller than the diameter of the blind hole. A steel ball is provided in the blind hole, and the top of the steel ball abuts against the top of the locking groove through the insertion hole.

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