Safety lead tensile strength testing device

By designing a safety lead tensile strength testing device, the problems of lead leakage and root node defects during the stretching process of fireworks leads were solved, achieving high-precision testing and convenient operation, while reducing space occupation.

CN224216467UActive Publication Date: 2026-05-08LIUYANG ZHONGQI FIREWORKS MFG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
LIUYANG ZHONGQI FIREWORKS MFG CO LTD
Filing Date
2025-05-22
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

In existing technologies, fireworks fuses are prone to leakage and knots during the stretching process, affecting their function and safety, and there is a lack of effective tensile strength testing devices.

Method used

A safety lead tensile strength testing device was designed, including a base plate, a vertical plate, a telescopic rod, a guide rod, a support plate, and a fixing clamp. Through the coordinated use of these components, the tensile test and data recording of the lead can be realized, the lead swing amplitude can be reduced, the detection accuracy can be improved, and it can be folded to reduce the volume.

Benefits of technology

This technology enables effective tensile strength testing of fireworks fuses, improving testing accuracy and ease of operation while reducing the space required for the device.

✦ Generated by Eureka AI based on patent content.

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Abstract

A tensile strength testing device for a safety lead relates to the field of firework lead detection and comprises a bottom plate, a vertical plate, a telescopic rod, a guide rod, a support plate and a fixing clamp, anti-slip blocks are distributed on the lower end face of the bottom plate, the vertical plate is arranged on the upper end face of the bottom plate, the lower end of the vertical plate is hinged to the upper end face of the bottom plate, and the guide rod is transversely arranged at the upper end of the vertical plate. A transversely-arranged supporting plate is arranged at the upper end of one side of the vertical plate, a longitudinally-arranged telescopic rod is arranged on the other side of the vertical plate, a fixing clamp is arranged above the telescopic rod, the upper end of a lead is installed on the fixing clamp, the lead is lapped on a guide rod and the supporting plate, and a weight is installed at the lower end of the lead; according to the utility model, the vertical plate, the fixing clamp and the weight are arranged in a matched manner, so that a traction experiment can be conveniently carried out on a lead mounted on the vertical plate, and experimental data can be conveniently recorded; by arranging the positioning ring, the swing amplitude of the lead is reduced, and the detection precision is improved; the vertical plate and the bottom plate are hinged, so that the vertical plate can be folded, the size of the testing device is reduced, and the occupied space is reduced.
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Description

Technical Field

[0001] This utility model relates to the field of fireworks fuse testing, and in particular to a device for testing the tensile strength of safety fuses. Background Technology

[0002] The fuse is a pyrotechnic product used for ignition, flame transfer, and timing control during fireworks display. The safety of the fuse is related to the overall quality and safety of the fireworks display. During the production, installation, packaging, and transportation of fireworks, if the fuse is subjected to external tensile forces, phenomena such as leakage and knots may occur, causing the fuse to fail to perform the above functions and preventing the fireworks from achieving the desired effect during display. Therefore, we propose a safety fuse tensile strength testing device. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model discloses a safety fuse tensile strength testing device. This utility model sets a vertical plate on the base plate, and sets a telescopic rod, a guide rod, a support plate and a fixing clamp on the vertical plate to facilitate the tensile strength testing of fireworks safety fuses.

[0004] To achieve the aforementioned objective, this utility model adopts the following technical solution:

[0005] A safety lead tensile strength testing device includes a base plate, a vertical plate, a telescopic rod, a guide rod, a support plate, and a fixing clamp. Anti-slip blocks are distributed on the lower end face of the base plate. The upper end face of the base plate is provided with a vertical plate, the lower end of which is hinged to the upper end face of the base plate. A guide rod is provided at the upper end of the vertical plate in a horizontal direction. A support plate is provided at the upper end of one side of the vertical plate. A telescopic rod is provided at the other side of the vertical plate in a longitudinal direction. A fixing clamp is provided above the telescopic rod. The upper end of the lead wire is installed on the fixing clamp. The lead wire rests on the guide rod and the support plate. A weight is installed at the lower end of the lead wire.

[0006] The base plate has a U-shaped fixing frame at one end and perforations on the base plate.

[0007] The fixing clamp includes a fixing plate and a housing. The fixing plate is horizontally arranged on one side of the upright plate. The housing has a U-shaped structure. The inner walls at both ends of the housing are rotatably connected to the two sides of the fixing plate. The fixing plate has fixing holes at both ends. The inner walls at both ends of the housing have locking blocks that cooperate with the fixing holes. The fixing plate has fixing grooves distributed on its side. The upper end of the lead wire passes through the fixing groove. The inner wall of the housing has pressure blocks that cooperate with the fixing groove.

[0008] The upper end of the telescopic rod is hinged to the side of the upright plate. The telescopic rod has a locking function. A limiting plate is provided on the lower side of the telescopic rod. The lower end of the telescopic rod passes through a through hole, and the lower end surface of the limiting plate abuts against the upper end surface of the base plate.

[0009] The guide rod has a cylindrical structure, and the side of the guide rod has grooves that correspond to the fixing groove.

[0010] The support plate is arranged parallel to the guide rod, one side of the support plate is connected to the side of the upright plate, and the support plate has grooves that correspond to the fixing grooves.

[0011] The lower end of the support plate is provided with positioning rings, which are correspondingly set with fixing grooves. The lower end of the lead wire passes through the positioning ring. A connecting rod is provided on the side of the positioning ring. One end of the connecting rod is connected to the side of the positioning ring, and the other end of the connecting rod is connected to the upright plate.

[0012] The lower end of the lead wire is provided with a fixing component, which includes a sleeve and a support plate. The sleeve and the support plate are coaxially arranged. The sleeve passes through the support plate. The lower end of the lead wire is installed inside the sleeve. The side of the sleeve is provided with a threaded bolt. One end of the bolt passes through the sleeve. The weight is placed above the support plate.

[0013] The present invention discloses a safety lead tensile strength testing device. This invention is highly practical and very convenient to use. The combination of a vertical plate, a fixing clamp, and weights facilitates the pulling test of the lead mounted on the vertical plate and makes it easy to record experimental data. The positioning ring reduces the swing amplitude of the lead and improves the detection accuracy. The hinged connection between the vertical plate and the base plate allows the vertical plate to be folded, reducing the size of the testing device and minimizing space occupation. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a three-dimensional structural diagram of the base plate of this utility model;

[0016] Figure 3 This is a schematic diagram showing the positional relationship between the base plate and the upright plate of this utility model;

[0017] Figure 4 This is a side view of the telescopic rod of this utility model;

[0018] Figure 5 This is an enlarged view of point A in this utility model;

[0019] Figure 6 This is a schematic diagram of the three-dimensional structure of the fixing clip of this utility model;

[0020] In the diagram: 1. Base plate; 2. Vertical plate; 3. Guide rod; 4. Support plate; 5. Lead wire; 6. Fixing frame; 7. Anti-slip block; 8. Perforation; 9. Telescopic rod; 10. Limiting plate; 11. Connecting rod; 12. Positioning ring; 13. Sleeve; 14. Support plate; 15. Weight; 16. Fixing plate; 17. Housing; 18. Fixing groove; 19. Pressure block; 20. Fixing hole; 21. Locking block. Detailed Implementation

[0021] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0022] Combined with appendix Figures 1-6 A safety lead tensile strength testing device includes a base plate 1, a vertical plate 2, a telescopic rod 9, a guide rod 3, a support plate 4, and a fixing clamp. Anti-slip blocks 7 are distributed on the lower end surface of the base plate 1. The vertical plate 2 is provided on the upper end surface of the base plate 1. The lower end of the vertical plate 2 is hinged to the upper end surface of the base plate 1. The guide rod 3 is provided on the upper end of the vertical plate 2. The support plate 4 is provided on the upper end of one side of the vertical plate 2. The side of the vertical plate 2 below the support plate 4 is provided with scale lines. The telescopic rod 9 is provided on the other side of the vertical plate 2. The fixing clamp is provided above the telescopic rod 9. The upper end of the lead wire 5 is installed on the fixing clamp. The lead wire 5 rests on the guide rod 3 and the support plate 4. The lower end of the lead wire 5 is installed with a weight 15.

[0023] The base plate 1 has a U-shaped fixing frame 6 at one end and a through hole 8 on the base plate 1.

[0024] The fixing clamp includes a fixing plate 16 and a housing 17. The fixing plate 16 is horizontally arranged on one side of the upright plate 2. The housing 17 has a U-shaped structure. The inner walls of both ends of the housing 17 are rotatably connected to the two sides of the fixing plate 16. The fixing plate 16 has fixing holes 20 at both ends. The inner walls of both ends of the housing 17 have locking blocks 21 that cooperate with the fixing holes 20. The fixing plate 16 has fixing grooves 18 distributed on its side. The upper end of the lead wire 5 passes through the fixing groove 18. The inner wall of the housing 17 has pressure blocks 19 that cooperate with the fixing groove 18. The end of the lead wire 5 is clamped between the pressure block 19 and the inner wall of the fixing groove 18 to fix the lead wire 5.

[0025] The upper end of the telescopic rod 9 is hinged to the side of the upright plate 2. The telescopic rod 9 has a locking function. A limiting plate 10 is provided on the lower side of the telescopic rod 9. The lower end of the telescopic rod 9 passes through the through hole 8. The lower end face of the limiting plate 10 abuts against the upper end face of the base plate 1. The telescopic rod 9 keeps the upright plate 2 in an upright state.

[0026] The guide rod 3 has a cylindrical structure, and the side of the guide rod 3 has grooves that correspond to the fixing groove 18. The lead wire 5 is in the groove of the guide rod 3 to prevent the lead wire 5 from shifting.

[0027] The support plate 4 is arranged parallel to the guide rod 3. One side of the support plate 4 is connected to the side of the upright plate 2. The support plate 4 has grooves that correspond to the fixing groove 18. The lead wire 5 is in the groove of the support plate 4 to prevent the lead wire 5 from swinging laterally.

[0028] The lower end of the support plate 4 is provided with positioning rings 12, which are correspondingly set with the fixing grooves 18. The lower end of the lead wire 5 passes through the positioning ring 12. The positioning ring 12 reduces the swing amplitude of the lead wire 5 and improves the detection accuracy. The side of the positioning ring 12 is provided with a connecting rod 11. One end of the connecting rod 11 is connected to the side of the positioning ring 12, and the other end of the connecting rod 11 is connected to the upright plate 2.

[0029] The lower end of the lead wire 5 is provided with a fixing component, which includes a sleeve 13 and a support plate 14. The sleeve 13 and the support plate 14 are coaxially arranged. The sleeve 13 passes through the support plate 14. The lower end of the lead wire 5 is installed inside the sleeve 13. The side of the sleeve 13 is provided with a threaded bolt. One end of the bolt passes through the sleeve 13. The end of the bolt and the inner wall of the sleeve 13 fix the lower end of the lead wire 5. The weight 15 is placed above the support plate 14.

[0030] The safety lead tensile strength testing device described in this embodiment is used by first erecting the upright plate 2, inserting the lower end of the telescopic rod 9 into the lower through hole 8 and locking it, with the lower end face of the limiting plate 10 abutting against the upper end face of the base plate 1, and the telescopic rod 9 keeping the upright plate 2 in an upright state. The end of the lead wire 5 is then installed in the fixing groove 18 of the fixing clamp, and the housing 17 and fixing plate 16 are closed, with the end of the lead wire 5 clamped between the pressure block 19 and the inner wall of the fixing groove 18, thus fixing the lead wire 5. Then, the other end of the lead wire 5 is passed through the corresponding positioning ring 12. The positioning ring 12 reduces the swing amplitude of the lead wire 5, improving the detection accuracy. The lead wire 5 is placed in the groove of the guide rod 3 and the support plate 4 to prevent the lead wire 5 from swinging laterally. Then, the sleeve 13 is put on the lower end of the lead wire 5. The bolt on the side of the sleeve 13 is rotated, and the end of the bolt is fixed to the lower end of the lead wire 5 with the inner wall of the sleeve 13. Then, the weight 15 is placed on the support plate 14 until the lead wire 5 is broken, thereby testing the length that the lead wire 5 can be stretched. After the lead wire 5 is broken, the fixing device and the weight 15 fall on the base plate 1. The fixing frame 6 on the base plate 1 prevents the weight 15 from falling off the base plate 1 to avoid loss. Then, the lead wire 5 is removed, and the distance of the number of nodes generated on the lead wire 5 is detected and recorded.

[0031] The parts of this utility model not described in detail are prior art. Although this utility model has been specifically shown and introduced in conjunction with preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model. However, those skilled in the art should understand that various changes in form and detail can be made to this utility model without departing from the spirit and scope of this utility model as defined by the appended claims, and all such changes shall be within the protection scope of this utility model.

Claims

1. A safety lead tensile strength testing device, comprising a base plate (1), a vertical plate (2), a telescopic rod (9), a guide rod (3), a support plate (4), and a fixing clamp, wherein anti-slip blocks (7) are distributed on the lower end face of the base plate (1), and a vertical plate (2) is provided on the upper end face of the base plate (1), the lower end of the vertical plate (2) is hinged to the upper end face of the base plate (1), a guide rod (3) is provided on the upper end of the vertical plate (2) in a horizontal manner, a support plate (4) is provided on the upper end of one side of the vertical plate (2), and a telescopic rod (9) is provided on the other side of the vertical plate (2), characterized in that: A fixing clamp is provided above the telescopic rod (9), the upper end of the lead wire (5) is installed on the fixing clamp, the lead wire (5) rests on the guide rod (3) and the support plate (4), and a weight (15) is installed at the lower end of the lead wire (5).

2. The tensile strength testing device for safety leads according to claim 1, characterized in that: The base plate (1) has a U-shaped fixing frame (6) at one end and a perforation (8) on the base plate (1).

3. The tensile strength testing device for safety leads according to claim 1, characterized in that: The fixing clamp includes a fixing plate (16) and a housing (17). The fixing plate (16) is horizontally arranged on one side of the upright plate (2). The housing (17) has a U-shaped structure. The inner walls of both ends of the housing (17) are rotatably connected to the two sides of the fixing plate (16). The fixing plate (16) has fixing holes (20) at both ends. The inner walls of both ends of the housing (17) have locking blocks (21) that cooperate with the fixing holes (20). The fixing plate (16) has fixing grooves (18) distributed on its side. The upper end of the lead wire (5) passes through the fixing groove (18). The inner wall of the housing (17) has pressure blocks (19) that cooperate with the fixing groove (18).

4. The tensile strength testing device for safety leads according to claim 1, characterized in that: The upper end of the telescopic rod (9) is hinged to the side of the upright plate (2). The telescopic rod (9) has a locking function. The lower end of the telescopic rod (9) is provided with a limiting plate (10). The lower end of the telescopic rod (9) passes through the through hole (8). The lower end of the limiting plate (10) abuts against the upper end of the bottom plate (1).

5. The tensile strength testing device for safety leads according to claim 1, characterized in that: The guide rod (3) has a cylindrical structure, and the side of the guide rod (3) has grooves that correspond to the fixing groove (18).

6. The tensile strength testing device for safety leads according to claim 1, characterized in that: The support plate (4) is arranged parallel to the guide rod (3). One side of the support plate (4) is connected to the side of the upright plate (2). The support plate (4) has grooves that correspond to the fixing groove (18).

7. The tensile strength testing device for safety leads according to claim 6, characterized in that: The lower end of the support plate (4) is provided with positioning rings (12), which are correspondingly set with the fixing groove (18). The lower end of the lead wire (5) passes through the positioning ring (12). The side of the positioning ring (12) is provided with a connecting rod (11). One end of the connecting rod (11) is connected to the side of the positioning ring (12), and the other end of the connecting rod (11) is connected to the upright plate (2).

8. The tensile strength testing device for safety leads according to claim 7, characterized in that: The lower end of the lead wire (5) is provided with a fixing component, which includes a sleeve (13) and a support plate (14). The sleeve (13) and the support plate (14) are coaxially arranged. The sleeve (13) passes through the support plate (14). The lower end of the lead wire (5) is installed inside the sleeve (13). The side of the sleeve (13) is provided with a threaded bolt. One end of the bolt passes through the sleeve (13). The weight (15) is placed above the support plate (14).