Performance testing device for fireworks and crackers

Abstract

The utility model particularly relates to a firework and cracker performance testing device which comprises a box body, a plurality of pressure sensors are fixedly installed on the inner wall of the box body at equal intervals, an igniter is installed in the box body in an inserted mode, a through cavity is formed in the periphery of the box body, a box door is installed in the through cavity in an inserted mode, and a limiting rotating cavity is formed in the upper end of a placing plate. A limiting rotating disc is rotatably mounted at the upper end of the limiting rotating cavity, an inserting cavity is formed in the middle of the limiting rotating cavity and the limiting rotating disc, a plurality of positioning clamping blocks distributed in a circular array are slidably mounted between the limiting rotating cavity and the limiting rotating disc at equal intervals, and a driven gear ring is fixedly mounted on the periphery of the limiting rotating disc; and a rotating rod is rotationally installed in the containing plate, a driving gear connected with the driven gear ring in a meshed mode is fixedly installed at the inner end of the rotating rod, a first spring is arranged between the rotating rod and the containing plate, and the firework and cracker positioning effect can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of performance testing of fireworks and firecrackers, in particular to a performance testing device for fireworks and firecrackers. Background Technique

[0002] After the production and manufacturing of fireworks and firecrackers are completed, in order to avoid accidental injuries, reduce property losses and environmental protection, it is necessary to use a testing device to detect the impact force generated by the explosion of fireworks and firecrackers. In order to improve the positioning effect of the testing device on fireworks and firecrackers and avoid the deviation of fireworks during explosion, the patent document with the publication number of CN219244449U in the prior art provides a performance testing device for fireworks and firecrackers; the device is provided with two semi-circular clamping plates, which cooperate with the threaded rod to position the fireworks.

[0003] However, the device clamps and positions the fireworks through two semi-circular clamping plates, and the structure of the semi-circular clamping plates is fixedly arranged, which results in that it can only position the fireworks with a specific size and shape. If the outer radius of the fireworks is smaller than the inner radius of the semi-circular clamping plate cavity, it cannot position the fireworks. If the radius of the semi-circular clamping plate is smaller than the outer radius of the fireworks, the semi-circular clamping plate can only contact and position the fireworks through its two outer ends on both sides, which will obviously limit the positioning effect of the device on the fireworks. For this reason, we have proposed a performance testing device for fireworks and firecrackers. Content of the Utility Model

[0004] The purpose of the utility model is to provide a performance testing device for fireworks and firecrackers to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A performance testing device for fireworks and firecrackers, including a box body, a plurality of pressure sensors are fixedly installed at equal intervals on the inner wall of the box body, a igniter is inserted and installed in the box body, a through cavity is opened on the periphery of the box body, a box door is inserted and installed in the through cavity, a placement plate is fixedly installed on the inner wall of the box door, a limit rotation cavity is opened at the upper end of the placement plate, a limit rotation disk is rotatably installed at the upper end of the limit rotation cavity, an insertion cavity is opened in the middle of the limit rotation cavity and the limit rotation disk, a plurality of positioning blocks distributed in a circular array are slidably installed at equal intervals between the limit rotation cavity and the limit rotation disk, a driven gear ring is fixedly installed on the periphery of the limit rotation disk, a rotating rod is rotatably installed in the placement plate, a driving gear meshed with the driven gear ring is fixedly installed at the inner end of the rotating rod, and a first spring is arranged between the rotating rod and the placement plate.

[0006] Preferably, second limiting sliders and first limiting sliders are fixedly installed at the upper and lower ends of each of the positioning blocks respectively. A first limiting chute which is slidably connected with the first limiting slider is arranged at the upper end of the limiting rotating cavity. A second limiting chute which is slidably connected with the second limiting slider is arranged at the lower end of the limiting rotating disc, and the second limiting chute is arranged in an inclined manner.

[0007] Preferably, a concave cavity is arranged at the upper end of the placing plate. The driving gear is rotatably installed in the concave cavity. A limiting rotating frame which is rotatably connected with the rotating rod is fixedly installed at the upper end of the placing plate. The first spring is arranged in the limiting rotating frame. First inserting holes and second inserting holes are respectively arranged on the periphery of the rotating rod and the inner wall of the limiting rotating frame. The head and the tail ends of the first spring are respectively inserted and installed in the first inserting hole and the second inserting hole.

[0008] Preferably, a limiting seat is fixedly installed on the outer wall of the box body. A limiting slot is arranged on the periphery of the igniter. A limiting insert block which is inserted into the limiting slot is fixedly installed on the inner wall of the limiting seat. A threaded curve groove is arranged on the periphery of the igniter. A threaded ring which is in threaded connection with the threaded curve groove is rotatably installed at the outer end of the limiting seat.

[0009] Preferably, an exhaust pipe is fixedly installed at the upper end of the box body. A material blocking frame, a filter screen and an exhaust fan are arranged in the exhaust pipe. A limiting clamping slot is arranged on the inner wall of the exhaust pipe. First clamping blocks, second clamping blocks and third clamping blocks which are inserted into the limiting clamping slot are respectively fixedly installed on the peripheries of the material blocking frame, the filter screen and the exhaust fan.

[0010] Preferably, a through hole is arranged at the lower end of the material blocking frame. A limiting sliding rod is fixedly installed on the inner wall of the material blocking frame. A sealing plate which is slidably connected with the limiting sliding rod is arranged above the through hole, and the outer radius of the sealing plate is twice the inner radius of the through hole cavity. A second spring which is sleeved on the periphery of the limiting sliding rod is fixedly installed between the sealing plate and the material blocking frame.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] For this kind of fireworks performance testing device, an inserting cavity is arranged, so that fireworks can be installed in the limiting rotating cavity. Through the sliding connection between the positioning blocks and the limiting rotating cavity and the limiting rotating disc, and in cooperation with the rotating rod and the first spring, each positioning block can contract inwards or expand outwards, so that the positioning blocks can position fireworks with various sizes and shapes, and the positioning effect is significantly improved.

[0013] In this firework performance testing device, a material blocking frame is arranged below the filter screen and the exhaust fan. Cooperating with the sealing plate and the second spring, when the exhaust fan is closed, impurities at the lower end of the filter screen can fall into the material blocking frame, thereby avoiding the impurities from falling back into the box body and polluting the inner cavity of the box body. Moreover, through the detachable material blocking frame, it is convenient to recycle the impurities. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the external structure of the box body of the present utility model;

[0015] Figure 2 It is a schematic diagram of the internal structure of the box body and the positioning block of the present utility model;

[0016] Figure 3 It is a schematic diagram of the internal structure of the box body of the present utility model;

[0017] Figure 4 It is a schematic diagram of the internal split structure of the positioning block of the present utility model;

[0018] Figure 5 It is a schematic diagram of the internal split structure of the rotating rod of the present utility model;

[0019] Figure 6 It is a schematic diagram of the internal split structure at the igniter of the present utility model;

[0020] Figure 7 It is a schematic diagram of the internal split structure of the exhaust pipe of the present utility model.

[0021] In the figure:

[0022] 1. Box body; 11. Pressure sensor; 12. Through cavity; 14. Igniter; 141. Limit seat; 142. Limit insertion block; 143. Limit slot; 144. Threaded curve groove; 145. Threaded ring;

[0023] 2. Box door; 20. Placing plate; 22. Limit rotating cavity; 23. Limit rotating disk; 24. Insertion cavity; 25. Positioning block; 26. First limit slider; 261. First limit sliding groove; 27. Second limit slider; 271. Second limit sliding groove;

[0024] 3. Rotating rod; 31. Driving gear; 32. Driven toothed ring; 33. Concave cavity; 34. Limit rotating frame; 35. First spring; 36. First jack; 37. Second jack;

[0025] 4. Exhaust pipe; 40. Limit card slot; 41. Material blocking frame; 411. First card block; 412. Through hole; 413. Sealing plate; 414. Limit sliding rod; 42. Filter screen; 421. Second card block; 43. Exhaust fan; 431. Third card block; 415. Second spring. Detailed implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0027] Please refer to Figures 1-7 , the present invention provides a technical solution: a performance testing device for fireworks and firecrackers, including a box body 1. A plurality of pressure sensors 11 are fixedly installed at equal intervals on the inner wall of the box body 1. An igniter 14 is inserted and installed in the box body 1. A through cavity 12 is opened on the periphery of the box body 1. A box door 2 is inserted and installed in the through cavity 12. A placement plate 20 is fixedly installed on the inner wall of the box door 2. A limit rotation cavity 22 is opened at the upper end of the placement plate 20. A limit rotation disk 23 is rotatably installed at the upper end of the limit rotation cavity 22. An insertion cavity 24 is opened in the middle of the limit rotation cavity 22 and the limit rotation disk 23. A plurality of positioning blocks 25 distributed in a circular array are slidably installed at equal intervals between the limit rotation cavity 22 and the limit rotation disk 23. A driven gear ring 32 is fixedly installed on the periphery of the limit rotation disk 23. A rotating rod 3 is rotatably installed in the placement plate 20. A driving gear 31 meshed with the driven gear ring 32 is fixedly installed at the inner end of the rotating rod 3. And a first spring 35 is arranged between the rotating rod 3 and the placement plate 20.

[0028] Working principle: When in use, in the through cavity 12, the box door 2 is pulled outwards, the rotating rod 3 is rotated, so that the first spring 35 deforms, and through the meshing connection between the driven gear ring 32 and the driving gear 31, the limit rotation disk 23 is driven to rotate at the upper end of the limit rotation cavity 22. Through the sliding connection between the positioning blocks 25 and the limit rotation disk 23 and the limit rotation cavity 22, each positioning block 25 is driven to expand outwards. Then the fireworks and firecrackers are placed in the insertion cavity 24. The rotating rod 3 is released. Under the action of the first spring 35 restoring deformation, the rotating rod 3 is driven to rotate reversely, so as to drive the limit rotation disk 23 to rotate reversely, and then drive each positioning block 25 to contract inwards, so that each positioning block 25 contacts the periphery of the fireworks and firecrackers, achieving the effect of positioning the fireworks and firecrackers. Finally, the box door 2 is inserted into the through cavity 12, and the fireworks and firecrackers are installed into the box body 1;

[0029] During the installation process of the fireworks and firecrackers, the height can be adjusted in the insertion cavity 24 so that the upper lead of the fireworks and firecrackers corresponds to the position of the igniter 14. Thus, after the fireworks and firecrackers are installed, the upper lead thereof contacts the igniter 14, and the fireworks and firecrackers are ignited through the igniter 14. Through the pressure sensors 11, the impact force generated by its explosion can be tested.

[0030] As a further description of the above technical solution: at the upper and lower ends of each positioning block 25, a second limit slider 27 and a first limit slider 26 are fixedly installed respectively. At the upper end of the limit rotation cavity 22, a first limit chute 261 which is slidably connected with the first limit slider 26 is provided. At the lower end of the limit rotation disk 23, a second limit chute 271 which is slidably connected with the second limit slider 27 is provided, and the second limit chute 271 is inclined.

[0031] Specifically, through the sliding connection between the first limit slider 26 and the first limit chute 261, the movement directions of the positioning blocks 25 can be restricted at the upper end of the limit rotation cavity 22, so that the rotating limit rotation disk 23 can drive each positioning block 25 to contract inward or expand outward through the sliding connection between the inclined second limit chute 271 and the second limit slider 27.

[0032] As a further description of the above technical solution: a concave cavity 33 is provided at the upper end of the placing plate 20. The driving gear 31 is rotatably installed in the concave cavity 33. A limit rotation frame 34 which is rotatably connected with the rotating rod 3 is fixedly installed at the upper end of the placing plate 20. A first spring 35 is arranged in the limit rotation frame 34. A first insertion hole 36 and a second insertion hole 37 are respectively provided on the outer periphery of the rotating rod 3 and the inner wall of the limit rotation frame 34. The head and tail ends of the first spring 35 are respectively inserted and installed in the first insertion hole 36 and the second insertion hole 37.

[0033] Specifically, the concave cavity 33 is provided to provide a rotating space for the driving gear 31 to avoid interference between it and the placing plate 20. The first insertion hole 36 and the second insertion hole 37 which are connected with the head and tail ends of the first spring 35 can limit the movement of the head and tail ends of the first spring 35. When the rotating rod 3 rotates, the first spring 35 can be deformed.

[0034] As a further description of the above technical solution: a limit seat 141 is fixedly installed on the outer wall of the box body 1. A limit slot 143 is provided on the periphery of the igniter 14. A limit block 142 which is inserted into the limit slot 143 is fixedly installed on the inner wall of the limit seat 141. A threaded curve groove 144 is provided on the periphery of the igniter 14. A threaded ring 145 which is threadedly connected with the threaded curve groove 144 is rotatably installed at the outer end of the limit seat 141.

[0035] Specifically, after igniting the upper lead of the fireworks through the igniter 14, the threaded ring 145 can be rotated at the outer end of the limit seat 141. With the limit seat 141 being connected to the limit plug 142 through the limit slot 143, under the restriction of the movement direction of the igniter 14, the rotating threaded ring 145 can drive the igniter 14 to move outward through its threaded connection with the threaded curve groove 144, avoiding the impact force generated by the explosion of the fireworks from damaging the igniter 14 and achieving the effect of protecting the igniter 14.

[0036] As a further description of the above technical solution: An exhaust pipe 4 is fixedly installed at the upper end of the box body 1. Inside the exhaust pipe 4, there are a material blocking frame 41, a filter screen 42, and an exhaust fan 43. A limit card slot 40 is opened on the inner wall of the exhaust pipe 4. First card blocks 411, second card blocks 421, and third card blocks 431 that are inserted into the limit card slot 40 are respectively fixedly installed on the peripheries of the material blocking frame 41, the filter screen 42, and the exhaust fan 43. A through hole 412 is opened at the lower end of the material blocking frame 41. A limit sliding rod 414 is fixedly installed on the inner wall of the material blocking frame 41. A sealing plate 413 that is slidably connected to the limit sliding rod 414 is provided above the through hole 412, and the outer radius of the sealing plate 413 is twice the inner cavity radius of the through hole 412. A second spring 415 sleeved on the periphery of the limit sliding rod 414 is fixedly installed between the sealing plate 413 and the material blocking frame 41.

[0037] Specifically, after the fireworks are ignited and exploded, the exhaust fan 43 is started. Through the exhaust pipe 4, the air inside the box body 1 can be discharged upward. Due to the change in the pressure difference between the upper and lower ends of the sealing plate 413, the sealing plate 413 can be driven to move upward, causing it to separate from the through hole 412 and deforming the second spring 415. Through the through hole 412 and the gap between the periphery of the sealing plate 413 and the inner wall of the material blocking frame 41, the air can be guided upward. Through the filter screen 42, the impurities generated by the explosion of the fireworks in the air can be blocked.

[0038] When the exhaust fan 43 is turned off, the pressure difference between the upper and lower ends of the sealing plate 413 tends to balance. Under the action of the second spring 415 restoring deformation, the sealing plate 413 can be driven to reset downward to fit with the through hole 412, achieving the effect of sealing the through hole 412. When the loose impurities at the lower end of the filter screen 42 fall, through the material blocking frame 41, these impurities can be blocked to prevent them from falling into the box body 1. Through the insertion connection between the first card block 411, the second card block 421, the third card block 431 and the limit card slot 40, the material blocking frame 41, the filter screen 42, and the exhaust fan 43 can be disassembled inside the exhaust pipe 4, enabling the surface of the filter screen 42 to be cleaned and the impurities inside the material blocking frame 41 to be recycled.

[0039] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A performance testing device for fireworks and firecrackers, comprising a box body (1), characterized in that: A plurality of pressure sensors (11) are fixedly installed at equal intervals on the inner wall of the box body (1). An igniter (14) is inserted and installed in the box body (1). A through cavity (12) is formed around the box body (1). A box door (2) is inserted and installed in the through cavity (12). A placement plate (20) is fixedly installed on the inner wall of the box door (2). A limiting rotation cavity (22) is formed at the upper end of the placement plate (20). A limiting rotation disk (23) is rotatably installed at the upper end of the limiting rotation cavity (22). An insertion cavity (24) is formed in the middle of the limiting rotation cavity (22) and the limiting rotation disk (23). A plurality of positioning blocks (25) distributed in a circular array are slidably installed at equal intervals between the limiting rotation cavity (22) and the limiting rotation disk (23). A driven gear ring (32) is fixedly installed on the periphery of the limiting rotation disk (23). A rotating rod (3) is rotatably installed in the placement plate (20). A driving gear (31) meshed with the driven gear ring (32) is fixedly installed at the inner end of the rotating rod (3). A first spring (35) is arranged between the rotating rod (3) and the placement plate (20).

2. The performance testing device for fireworks and firecrackers according to claim 1, wherein: A second limiting slider (27) and a first limiting slider (26) are respectively fixedly installed at the upper and lower ends of each positioning block (25). A first limiting chute (261) slidably connected with the first limiting slider (26) is formed at the upper end of the limiting rotation cavity (22). A second limiting chute (271) slidably connected with the second limiting slider (27) is formed at the lower end of the limiting rotation disk (23). The second limiting chute (271) is inclined.

3. The performance testing device for fireworks and firecrackers according to claim 1, characterized in that: A concave cavity (33) is formed at the upper end of the placement plate (20). The driving gear (31) is rotatably installed in the concave cavity (33). A limiting rotation frame (34) rotatably connected with the rotating rod (3) is fixedly installed at the upper end of the placement plate (20). The first spring (35) is arranged in the limiting rotation frame (34). A first insertion hole (36) and a second insertion hole (37) are respectively formed on the periphery of the rotating rod (3) and the inner wall of the limiting rotation frame (34). The head and tail ends of the first spring (35) are respectively inserted and installed in the first insertion hole (36) and the second insertion hole (37).

4. A performance testing device for fireworks and firecrackers according to claim 1, characterized in that: A limiting seat (141) is fixedly installed on the outer wall of the box body (1). A limiting slot (143) is formed around the igniter (14). A limiting insert block (142) inserted into the limiting slot (143) is fixedly installed on the inner wall of the limiting seat (141). A threaded curve groove (144) is formed around the igniter (14). A threaded ring (145) threadedly connected with the threaded curve groove (144) is rotatably installed at the outer end of the limiting seat (141).

5. A fireworks performance testing device according to claim 1, characterized in that: An exhaust pipe (4) is fixedly installed at the upper end of the box body (1). A material blocking frame (41), a filter screen (42) and an exhaust fan (43) are arranged in the exhaust pipe (4). A limiting card slot (40) is formed in the inner wall of the exhaust pipe (4). First clamping blocks (411), second clamping blocks (421) and third clamping blocks (431) inserted into the limiting card slot (40) are fixedly installed on the peripheries of the material blocking frame (41), the filter screen (42) and the exhaust fan (43) respectively.

6. The performance testing device for fireworks and firecrackers according to claim 5, wherein: A through hole (412) is formed at the lower end of the material blocking frame (41). A limiting sliding rod (414) is fixedly installed on the inner wall of the material blocking frame (41). A sealing plate (413) slidably connected to the limiting sliding rod (414) is arranged above the through hole (412). The outer radius of the sealing plate (413) is twice the inner cavity radius of the through hole (412). A second spring (415) sleeved on the periphery of the limiting sliding rod (414) is fixedly installed between the sealing plate (413) and the material blocking frame (41).

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