Initiating explosive device hammering test device

Abstract

The utility model discloses an initiating explosive device hammering test device, which relates to the technical field of initiating explosive device hammering tests and comprises a bottom plate, two side plates are symmetrically welded on the bottom plate, a motor is mounted on the bottom plate through bolts, a rotating shaft and a mounting shaft are rotatably connected between the two side plates, a first synchronous pulley is arranged at the output end of the motor, and a second synchronous pulley is arranged at the output end of the motor. A first synchronous belt wheel is arranged on the mounting shaft, a rotating shaft is arranged on the mounting shaft, a second synchronous belt wheel is arranged on the rotating shaft, the first synchronous belt wheel and the second synchronous belt wheel are in transmission connection through a cog belt, a cam is arranged on the rotating shaft and is crescent, a hammer arm is arranged on the mounting shaft, and a hammer head is fixed at the front end of the hammer arm through a bolt. According to the utility model, by controlling the rotating speed of the motor, adjusting the pressure of the compression cylinder and replacing different hammers according to specific use requirements, the requirements of a large-scale hammering test that the hammering frequency is 30-80 times / min and the maximum hammering acceleration is less than or equal to 100000g can be met.

Description

Technical Field

[0001] This utility model relates to the field of pyrotechnic hammer impact testing technology, and specifically to a pyrotechnic hammer impact testing device. Background Technology

[0002] During the production of pyrotechnic products, environmental reliability tests are required. Among the environmental tests, the hammer impact test, which is unique to pyrotechnic products, mainly simulates the recoil force experienced by the pyrotechnic product in the barrel when it is fired from a cannon or the impact force experienced when it penetrates a hard target.

[0003] With the continuous upgrading of weaponry and equipment, the firing frequency of artillery has increased dramatically, and the working power has also increased accordingly. However, the existing hammer impact testing equipment cannot meet the requirements for use in terms of impact frequency and peak impact acceleration (hammer impact frequency requirement (30-60) times / min, working power acceleration ≤100000g). Therefore, we propose a hammer impact testing device for pyrotechnic items. Utility Model Content

[0004] In view of the problems existing in the above-mentioned pyrotechnic hammer impact testing device, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a hammer impact testing device for pyrotechnic products, which solves the problem that the impact frequency and peak impact acceleration of existing hammer impact testing equipment cannot meet the requirements for use.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A pyrotechnic hammer impact testing device includes a base plate with two symmetrically welded side plates. A motor is bolted to the base plate. A rotating shaft and a mounting shaft are rotatably connected between the two side plates. A first synchronous pulley is provided on the output end of the motor, and a second synchronous pulley is provided on the rotating shaft. The first and second synchronous pulleys are connected by a toothed belt. A crescent-shaped cam is provided on the rotating shaft. A hammer arm is provided on the mounting shaft. A hammer head is fixed to the front end of the hammer arm with bolts. A push rod is installed slightly below the middle section of the hammer arm. A bearing is provided at the other end of the push rod, and the push rod is connected to the cam through the bearing. A fixing frame is installed on the side plates, and a booster cylinder is installed on the fixing frame. The extension end of the booster cylinder is hinged to the outer wall of the hammer arm.

[0008] Preferably, the hammer head has screw holes and inlay grooves for mounting pyrotechnic items on its upper surface, and also has screw holes for mounting sensors.

[0009] Preferably, an infrared sensor is installed at the front end of the base plate.

[0010] Preferably, photoelectric sensors are installed on the outer walls of both side plates, and the distance between the sensing section of the photoelectric sensor and the side surfaces of the left and right cams is 2mm to 3mm.

[0011] Preferably, the number of cams, hammer arms, and booster cylinders are all provided to be 8.

[0012] Preferably, the base plate is provided with a mesh metal protective net around its perimeter, and the mesh size of the mesh metal protective net is less than 1cm × 1cm.

[0013] Preferably, the side plate is welded with a hammering surface, and the hammer head is positioned in a corresponding manner to the hammering surface.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] This invention, by controlling the motor speed, adjusting the pressure of the compressed cylinder, and changing different hammer heads according to specific usage requirements, can meet the requirements of large-scale hammering tests with a hammering frequency of (30-80) times / min and a maximum hammering acceleration ≤100000g. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a side view of the structure of this utility model;

[0018] Figure 2 This is a front view structural diagram of the present utility model;

[0019] Figure 3 This is a schematic diagram of the circuit structure of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Base plate; 2. Side plate; 3. Motor; 4. Shaft; 5. First synchronous pulley; 6. Second synchronous pulley; 7. Cam; 8. Hammer arm; 9. Hammer head; 10. Fixing frame; 11. Pressure booster cylinder; 12. Hammering surface; 13. Infrared sensor; 14. Photoelectric sensor. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] This utility model discloses a hammer impact test device for pyrotechnic items.

[0024] This utility model provides, for example Figure 1-3 The pyrotechnic hammer test device shown includes a base plate 1, on which two side plates 2 are symmetrically welded. A motor 3 is bolted to the base plate 1. A rotating shaft 4 and a mounting shaft are rotatably connected between the two side plates 2. A first synchronous pulley 5 is provided on the output end of the motor 3, and a second synchronous pulley 6 is provided on the rotating shaft 4. The first synchronous pulley 5 and the second synchronous pulley 6 are connected by a toothed belt. A cam 7 is provided on the rotating shaft 4. The cam 7 is crescent-shaped. A hammer arm 8 is provided on the mounting shaft. A hammer head 9 is fixed to the front end of the hammer arm 8 by bolts. A push rod is installed slightly lower in the middle section of the hammer arm 8. A bearing is provided at the other end of the push rod. The push rod is connected to the cam 7 through the bearing. A fixing frame 10 is installed on the side plate 2. A booster cylinder 11 is installed on the fixing frame 10. The extension end of the booster cylinder 11 is hinged to the outer wall of the hammer arm 8.

[0025] The pyrotechnic hammer impact test device of this utility model has a screw hole and an inlay groove for pyrotechnic installation on the upper surface of the hammer head 9, and a screw hole for sensor installation, which can facilitate the installation of samples and related sensors.

[0026] The pyrotechnic hammer impact testing device of this utility model has an infrared sensor 13 installed at the front end of the base plate 1. When a person approaches within ≤1m, the sensor can give a stop signal to the frequency converter and activate the braking system of the motor 3 to ensure the personal safety of the operator.

[0027] The pyrotechnic hammer test device of this utility model has photoelectric sensors 14 installed on the outer walls of the two side plates 2. The distance between the sensing section of the photoelectric sensor 14 and the side of the left and right cams 7 is 2mm to 3mm, which can be used for counting on one side and frequency adjustment feedback on the other.

[0028] The pyrotechnic hammer impact testing device of this utility model has eight cams 7, eight hammer arms 8, and eight pressurizing cylinders 11. The hammer heads 9 are made of three materials (rubber, polyurethane, and steel) and there are eight of each material. Multiple samples can be tested at once. The use of three materials for the hammer heads 9 (rubber, polyurethane, and steel) allows them to be replaced according to the peak acceleration requirements of the test conditions, thus improving the applicability of the entire device.

[0029] The pyrotechnic hammer impact testing device of this utility model has a mesh metal protective net around the base plate 1. The mesh size of the mesh metal protective net is less than 1cm×1cm, which can further improve the safety during use.

[0030] The pyrotechnic hammer test device of this utility model has a hammering surface 12 welded on the side plate 2, and the hammer head 9 is in the same position as the hammering surface 12, which can facilitate the use of the whole device.

[0031] In use, the test sample is screwed onto the special mounting screw hole on the upper end of the hammer head 9, or embedded in the special slot. Then, the motor 3 drives the cam 7 to rotate, which lifts the hammer arm 8 through the push rod, thereby compressing the piston rod of the booster cylinder 11. After the cam 7 slides past the push rod bearing of the hammer arm 8 at its highest point, the hammer arm 8, carrying the hammer head 9, strikes the hammer impact surface 12 under the thrust and gravity of the piston rod of the booster cylinder 11, generating the required peak acceleration. The frequency of hammering can be changed by adjusting the output frequency of the frequency converter. The magnitude of the peak acceleration can be obtained by replacing different hammer heads 9, or by adjusting the accumulator pressure of the booster cylinder 11 to change the initial descent velocity of the hammer head 9.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A hammer impact testing device for pyrotechnic items, comprising a base plate (1), characterized in that, Two side plates (2) are symmetrically welded on the base plate (1). A motor (3) is installed on the base plate (1) by bolts. A rotating shaft (4) and a mounting shaft are rotatably connected between the two side plates (2). A first synchronous pulley (5) is provided on the output end of the motor (3). A second synchronous pulley (6) is provided on the rotating shaft (4). The first synchronous pulley (5) and the second synchronous pulley (6) are connected by a toothed belt. A cam (7) is provided on the rotating shaft (4). The cam (7) is crescent-shaped. A hammer arm (8) is provided on the mounting shaft. A hammer head (9) is fixed to the front end of the hammer arm (8) by bolts. A push rod is installed on the lower middle section of the hammer arm (8). A bearing is provided at the other end of the push rod. The push rod is connected to the cam (7) through the bearing. A fixing frame (10) is installed on the side plate (2). A booster cylinder (11) is installed on the fixing frame (10). The extension end of the booster cylinder (11) is hinged to the outer wall of the hammer arm (8).

2. The pyrotechnic hammer impact testing apparatus according to claim 1, characterized in that, The hammer (9) has screw holes and inlay grooves for mounting pyrotechnic items on its upper surface, and also has screw holes for mounting sensors.

3. The pyrotechnic hammer impact testing apparatus according to claim 1, characterized in that, An infrared sensor (13) is installed at the front end of the base plate (1).

4. The pyrotechnic hammer impact testing apparatus according to claim 1, characterized in that, Photoelectric sensors (14) are installed on the outer walls of the two side plates (2). The distance between the sensing section of the photoelectric sensor (14) and the side of the left and right cams (7) is 2mm to 3mm.

5. The pyrotechnic hammer impact testing apparatus according to claim 1, characterized in that, The number of cams (7), hammer arms (8) and booster cylinders (11) is 8 each.

6. The pyrotechnic hammer impact testing apparatus according to claim 1, characterized in that, The base plate (1) is surrounded by a mesh metal protective net, the mesh size of which is less than 1cm × 1cm.

7. The pyrotechnic hammer impact testing apparatus according to claim 1, characterized in that, The side plate (2) is welded with a hammering surface (12), and the hammer head (9) is in the same position as the hammering surface (12).

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