Initiating explosive device rotation torque thrust testing device

Abstract

The utility model provides an initiating explosive device rotation torque thrust testing device, which comprises a fixed bottom plate, a support rod, a mounting plate, a sensor fixing seat, a thrust sensor, a force transmission shaft, a force transmission frame, a fixed cylinder and a deep groove ball bearing, and is characterized in that the force transmission shaft is connected with an initiating explosive device to be tested, after the initiating explosive device to be tested works, force is transmitted to the thrust sensor through the force transmission shaft and the force transmission frame, and the thrust sensor is fixed through the deep groove ball bearing. A thrust time curve in the working process of the initiating explosive device is obtained, and the rotation impulse moment in the working process of the initiating explosive device can be calculated by combining the distance from the contact point of the force transmission arm and the thrust sensor to the center point of the force transmission frame. According to the utility model, the thrust sensor is adopted to replace a torque measurement assembly and a multi-component sensor to test the rotation impulse moment, the impact generated in the working process of the initiating explosive device can be borne, and the cost of the thrust sensor is low, so that the test cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of rotary torque test, concretely relates to a pyrotechnic product rotary torque thrust test device. BACKGROUND

[0002] The low-temperature gas generated when the pyrotechnic device works makes the product rotate clockwise, and the rotational impulse moment and rotational speed of the product when working are required to be tested. The rotational impulse moment is the time accumulation effect of the moment on the rotating object, and the test process generally measures the rotary torque and the accumulated time to obtain the rotational impulse moment by calculation.

[0003] The existing test technology mainly uses the torque test device for valve, motor and other tests. A motor torque test tool in Chinese patent CN219798580U realizes motor torque test through a torque test assembly. The tool structure is simple, and is suitable for micro motor test, but the test moment range is small, the torque test assembly cannot withstand the impact when the pyrotechnic device fires, and the structure is easy to lose stability. Some torque test devices for hydraulic power, such as hydraulic tongs torque test device in Chinese patent CN218847606U, realize torque test through different positions of the torque arm, and the structure is stable, but the assembly is complex, which is not conducive to torque transmission, has high cost and large error.

[0004] At present, there is also a way of directly connecting the product with a multi-component sensor for measurement in the torque test technology. The multi-component sensor can measure parameters such as moment and rotational force, and has advantages such as intuitive test and multiple measurement parameters. However, the installation process requires high rigidity of the installation plane and high positioning error, the fixing screw needs to be fixed and tightened along the diagonal line, which increases the test difficulty and the cost of the sensor itself is high.

[0005] The existing torque test device mainly has the following problems:

[0006] (1) The test device is commonly used for valve, motor and other tests, and has simple structure, small test moment range, test assembly that cannot withstand the impact when the pyrotechnic device fires, structure that is easy to lose stability, and some large torque test devices that are complex to assemble, have high use cost and large test error.

[0007] (2) The multi-component sensor test requires high test bench and installation process, and has high sensor purchase and use cost. INVENTION CONTENTS

[0008] The utility model aims at overcoming the defects of the prior art, and provides a pyrotechnic product rotary torque thrust test device which is convenient to install, has high stability, good bearing capacity and torque transmission capacity.

[0009] The above-mentioned purpose of the utility model is mainly realized by the following technical scheme:

[0010] A rotating torque thrust testing device for initiating explosive includes a fixed base plate, a support rod, a mounting plate, a sensor fixing seat, a thrust sensor, a force transmission shaft, a force transmission frame, and a bearing, one end of the support rod is connected to the fixed base plate, the other end is connected to the mounting plate, the sensor fixing seat is arranged on the upper surface of the mounting plate, the thrust sensor is connected to the side wall of the sensor fixing seat, the thrust sensor is in close contact with the force transmission arm of the force transmission frame, one end of the force transmission shaft is connected to the initiating explosive to be tested, the other end is connected to the force transmission frame, a through hole is formed in the mounting plate, the force transmission shaft passes through the through hole, and the bearing is arranged in the through hole and cooperates with the force transmission shaft.

[0011] The fixed base plate is provided with first fixed internal threads at four corners, the mounting plate is provided with fixed holes at four corners, one end of the support rod is provided with first fixed external threads matched with the first fixed internal threads, and the other end is provided with second fixed external threads matched with the mounting plate.

[0012] A platform is arranged on the cylindrical section close to the threads at two ends of the support rod, and is used for cooperation with a spanner.

[0013] The fixed base plate is provided with U-shaped holes at four edges, and is in a flat plate shape, so that the fixed base plate and a test table surface can be fixed through the U-shaped holes.

[0014] The diameter of the through hole in the surface of the mounting plate is greater at the upper end and the lower end than at the middle part, and the maximum diameter is 20-100 mm.

[0015] The sensor fixing seat includes a base plate, side plates and a vertical plate, a plurality of waist-shaped holes are arranged on the base plate and used for connection with the mounting plate, the mounting position of the sensor fixing seat can be adjusted through the waist-shaped holes to ensure that the thrust sensor is in close contact with the force transmission arm of the force transmission frame, the two side plates are triangular and connected with the vertical plate respectively, bolt fixing holes are arranged on the vertical plate and used for fixing the thrust sensor, and second fixed internal threads are arranged on the left side and the right side of the mounting plate and used for connection with the waist-shaped holes, so that the sensor fixing seat is mounted on the left side or the right side of the mounting plate.

[0016] The force transmission shaft includes a flange base, a fixed boss and a cylindrical main body, the flange base is connected with the initiating explosive to be tested, and the cylindrical main body is limited by the fixed boss after passing through the through hole of the mounting plate.

[0017] The diameter of the flange base is 100-300 mm.

[0018] The force transmission frame includes two force transmission arms, the force transmission arms are cross-shaped and symmetrically distributed, a square hole is arranged at the intersection of the force transmission arms, a square connecting column is arranged on the force transmission shaft and matched with the square hole of the force transmission frame to realize the connection between the force transmission shaft and the force transmission frame, and a fourth fixed external thread is further arranged on the force transmission shaft, the force transmission frame is pressed and fixed after the fourth fixed external thread is connected with a nut.

[0019] The fixed cylinder is provided with a third fixed internal thread, and the transmission shaft is provided with a third fixed external thread, and the third fixed internal thread and the third fixed external thread cooperate to fix the transmission shaft on the mounting plate.

[0020] Compared with the prior art, the utility model has at least the following beneficial effects:

[0021] (1) The utility model discloses a few tooling parts, simple structure, easy processing, low assembling technical requirement, bolt fixed structure, install fast, convenient, suspension type design, improve the device test process stability.

[0022] (2) The utility model discloses a deep groove ball bearing, has higher stability and carrying capacity, is favorable to reduce friction, reduces the rotation resistance.

[0023] (3) The utility model discloses a push sensor instead of torque measurement component, multi -component sensor test rotation impulse moment, can bear the impact generated in the process of pyrotechnics work while sensor itself cost is low, reduces the test cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the schematic diagram of the utility model firework rotation torque thrust test device;

[0025] Figure 2 It is the fixed bottom plate schematic diagram of the utility model firework rotation torque thrust test device;

[0026] Figure 3 It is the support rod schematic diagram of the utility model firework rotation torque thrust test device;

[0027] Figure 4 It is the mounting plate schematic diagram of the utility model firework rotation torque thrust test device;

[0028] Figure 5 It is the sensor fixed seat schematic diagram of the utility model firework rotation torque thrust test device;

[0029] Figure 6 It is the transmission shaft schematic diagram of the utility model firework rotation torque thrust test device;

[0030] Figure 7 It is the transmission frame schematic diagram of the utility model firework rotation torque thrust test device;

[0031] Figure 8 It is the fixed cylinder schematic diagram of the utility model firework rotation torque thrust test device. DETAILED DESCRIPTION

[0032] The utility model is further described in detail below in combination with the drawings and specific embodiments.

[0033] As shown in the figure, Figure 1 The utility model discloses a pyrotechnics rotating torque thrust testing device, including fixed base plate 1, support rod 2, mounting plate 3, sensor fixed seat 4, thrust sensor 5, transmission force shaft 6, transmission frame 7, fixed cylinder 8 and deep groove ball bearing 9. One end of support rod 2 is connected with fixed base plate 1, and the other end is connected with mounting plate 3, and sensor fixed seat 4 is arranged on the upper surface of mounting plate 3, and thrust sensor 5 is connected with the side wall of sensor fixed seat 4, and thrust sensor 5 is closely attached to transmission frame 7 transmission arm 71, and one end of transmission force shaft 6 is connected with the pyrotechnics to be tested, and the other end is connected with transmission frame 7, and the through hole 32 is formed on mounting plate 3, and transmission force shaft 6 passes through the through hole 32, and bearing 9 is arranged in the through hole 32 and is matched with transmission force shaft 6.

[0034] As shown in the figure, Figure 2 As shown in the figure, four first fixed internal threads 11 are arranged at the four corners of the fixed base plate 1, and four U-shaped holes 12 are arranged at the center positions of the four edges. The whole fixed base plate 1 is designed as a flat plate, and four groups of bolts and nuts can be used to fix the fixed base plate 1 and the test table surface through the U-shaped holes 12.

[0035] As shown in the figure, Figure 3 As shown in the figure, the left end of the support rod 2 is provided with a first fixed external thread 21 matched with the first fixed internal thread 11, and the right end is provided with a second fixed external thread 22 connected with the mounting plate 3. The length and size of the support rod 2 are determined according to the mass and size of the pyrotechnics to be tested, and the connection strength needs to be guaranteed to repeatedly bear the weight of the test product and the test impact strength. In order to facilitate installation and disassembly, the cylindrical section 23 close to the two end threads is milled flat, and the size of the interface is matched with the use of the wrench.

[0036] As shown in the figure, Figure 4 As shown in the figure, four fixed holes 31 are arranged at the four corners of the mounting plate 3, which are used for connecting the second fixed external thread 22 of the support rod 2, and the nut matched with the second fixed external thread 22 is selected and tightly fixed. The center position of the mounting plate 3 is provided with a through hole 32 symmetrically arranged on the upper and lower surfaces, which is used for installing the transmission force shaft 6 and the deep groove ball bearing 9. The size of the through hole 32 is determined according to the outer diameter of the transmission force shaft 6 and the model size of the selected deep groove ball bearing 9, and the diameter is 20-100mm. The transmission force shaft 6 and the deep groove ball bearing 9 need to be tightly matched to better transmit torque. Four second fixed internal threads 33 are arranged on the left and right sides of the mounting plate 3, which are used for installing the sensor fixed seat 4. The thread size and spacing are consistent with the waist-shaped hole 45 on the bottom plate 41 of the sensor fixed seat 4. The left four second fixed internal threads 33 are a group, and one sensor fixed seat 4 can be installed. Similarly, one sensor fixed seat 4 can also be installed on the right side. In actual use, the sensor fixed seat 4 is installed on the left side or the right side according to the rotating direction of the pyrotechnics to be tested.

[0037] As shown in Figure 5 The sensor fixing seat 4 includes a bottom plate 41, a side plate 42 and a vertical plate 43. The bottom plate 41 is provided with four waist-shaped holes 45 for connecting the sensor fixing seat 4 with the mounting plate 3. The side plate 42 is triangular to ensure the stability of the sensor fixing seat 4. The vertical plate 43 is provided with a bolt fixing hole 44, which needs to ensure that the push force sensor 5 is tightly attached to the force transmission arm of the force transmission frame 7 after installation, and the installation position of the sensor fixing seat 4 can be adjusted through the waist-shaped hole 45 to ensure that the push force sensor 5 is tightly attached to the force transmission arm of the force transmission frame 7.

[0038] The selection of the push force sensor 5 is a known technology in the art, which needs to be specifically selected in combination with the measurement object, linear range, precision and sensitivity to meet the test requirements.

[0039] As shown in Figure 6 The force transmission shaft 6 is a flange disc center belt transmission shaft structure, including a flange base 61, a fixed boss 62, a cylindrical body 63, a third fixed external thread 64, a square connecting column 65 and a fourth fixed external thread 66. The flange base 61 is used to connect the tested explosive, and its size is determined according to the interface size of the tested explosive. The diameter of the flange base 61 is 100-300 mm. The cylindrical body 63 passes through the through hole 32 of the mounting plate 3, is limited by the fixed boss 62, and is then tightly fixed by the third fixed external thread 64 and the third fixed internal thread 81 of the fixed cylinder 8. The square connecting column 65 is used to install the square hole 72 in the center of the force transmission frame 7. The fourth fixed external thread 66 is connected with the corresponding nut to tightly fix the force transmission frame 7.

[0040] As shown in Figure 7 The force transmission frame 7 is a cross-symmetric structure composed of two square strip force arms, including force transmission arms 71 and square holes 72. The force transmission arms 71 are four force arms symmetrically distributed in a cross shape. The square holes 72 are used to connect with the square connecting column 65 of the force transmission shaft 6.

[0041] As shown in Figure 8 The fixed cylinder 8 is provided with a third fixed internal thread 81, which cooperates with the third fixed external thread 64 of the force transmission shaft 6 to fix the force transmission shaft 6 on the mounting plate 3.

[0042] The steps of applying the above-mentioned explosive rotary torque and push force test device are as follows:

[0043] (1) Fix the fixed bottom plate 1 with four groups of bolts and nuts through the U-shaped holes 12 and the T-shaped table on the ground of the test site to ensure that the bolts are tightly screwed into place.

[0044] (2) The first fixed external thread 21 of the support rod 2 is abutted and tightly screwed with the first fixed internal thread 11 on the fixed bottom plate 1.

[0045] (3) The second fixed outer thread 22 of the support rod 2 is passed through the four fixed holes 31 on the mounting plate 3, and is tightly fixed with a matching nut.

[0046] (4) The initiating explosive device is fixed on the flange base 61 of the force transmission shaft 6, the two deep groove ball bearings 9 are respectively installed in the through holes 32 in the center of the mounting plate 3, the force transmission shaft 6 with the initiating explosive device is passed through the inner holes of the deep groove ball bearings 9 from the bottom surface of the mounting plate 3 upwards until the fixed boss 62 of the force transmission shaft 6 abuts against the bottom surface of the mounting plate 3, the third fixed inner thread 81 of the fixing cylinder 8 is butted against the third fixed outer thread 64 of the force transmission shaft 6 and is tightly screwed, and the lower end surface of the fixing cylinder 8 is attached to the mounting plate 3.

[0047] (5) The square hole 72 in the center of the force transmission frame 7 is sleeved on the square connecting column 65 of the force transmission shaft 6, and is tightly fixed with a nut matching the fourth fixed outer thread 66.

[0048] (6) According to the rotation direction of the initiating explosive device, the sensor fixing seat 4 is installed on the left side or the right side of the mounting plate 3, and is tightly screwed with a matching bolt using the second fixed inner thread 33 on the mounting plate 3. The thrust sensor 5 is installed on the vertical plate 43 of the sensor fixing seat 4 through the bolt fixing hole 44, and is tightly screwed in place. The installation position of the sensor fixing seat 4 is adjusted through the waist-shaped hole 45 on the bottom plate 41 of the sensor fixing seat 4 to ensure that one side of the force transmission arm 71 of the force transmission frame 7 is perpendicular to and tightly attached to the axis of the thrust sensor 5.

[0049] (7) The distance from the contact point of the force transmission arm 71 and the thrust sensor 5 to the center point of the force transmission frame 7 is measured before testing the torque thrust and is recorded.

[0050] (8) The initiation position of the initiating explosive device is connected to an initiation tester, the thrust sensor 5 is connected to a dynamic strain meter, and the dynamic strain meter is connected to a data acquisition system, forming a set of initiating explosive device rotation torque thrust test system.

[0051] (9) After the initiating explosive device works, the force is transmitted to the thrust sensor 5 through the force transmission shaft 6 and the force transmission frame 7, the thrust sensor 5 is signal-conditioned through the dynamic strain meter, the dynamic strain meter transmits the signal to the data acquisition system, and the thrust time curve during the working process of the initiating explosive device is obtained, and the rotational impulse moment during the working process of the initiating explosive device can be calculated combined with the distance from the contact point of the force transmission arm 71 and the thrust sensor 5 to the center point of the force transmission frame 7.

[0052] (10) In order to ensure safety during testing, the tested initiating explosive device is installed in a special test site, the special test site is set up in accordance with relevant requirements; the initiation point and the test system are set up in a special site in another area, and man-machine isolation is realized during the whole process.

[0053] The above merely describes the best mode of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

[0054] The contents not described in detail in the present application specification belong to the common knowledge of the person skilled in the art.

Claims

1. A device for testing the rotational torque thrust of a pyrotechnic charge, characterized in that: The device comprises a fixed base plate (1), a support rod (2), a mounting plate (3), a sensor fixing seat (4), a thrust sensor (5), a force transmission shaft (6), a force transmission frame (7), and a bearing (9). The support rod (2) is connected to the fixed base plate (1) at one end and connected to the mounting plate (3) at the other end. The sensor fixing seat (4) is arranged on the upper surface of the mounting plate (3). The thrust sensor (5) is connected to the side wall of the sensor fixing seat (4). The thrust sensor (5) is in close contact with the force transmission arm (71) of the force transmission frame (7). The force transmission shaft (6) is connected to the explosive to be tested at one end and connected to the force transmission frame (7) at the other end. A through hole (32) is formed in the mounting plate (3). The force transmission shaft (6) passes through the through hole (32). The bearing (9) is arranged in the through hole (32) and cooperates with the force transmission shaft (6).

2. The device according to claim 1, wherein: the device is a device for testing the rotational torque and thrust of a pyrotechnic product. The fixed base plate (1) is provided with a first fixed internal thread (11) at each corner. The mounting plate (3) is provided with a fixed hole (31) at each corner. The support rod (2) is provided with a first fixed external thread (21) at one end which cooperates with the first fixed internal thread (11). The support rod (2) is provided with a second fixed external thread (22) at the other end which cooperates with the mounting plate (3).

3. The device according to claim 2, wherein: the device is a device for testing the rotational torque and thrust of a pyrotechnic product. A cylindrical section (23) near the threads at both ends of the support rod (2) is provided with a platform which cooperates with a spanner.

4. The device of claim 1, wherein: the device is a rotating torque thrust test device for initiating a pyrotechnic charge. The fixed base plate (1) is provided with a U-shaped hole (12) at each side. The fixed base plate (1) is a flat plate which can be fixed to the test bench surface through the U-shaped hole (12).

5. The device of claim 1, wherein: the device is a rotating torque thrust test device for initiating a pyrotechnic charge. The diameter of the through hole (32) at both ends of the mounting plate (3) is greater than the diameter of the middle part. The maximum diameter is 20-100 mm. ​ 6. The device of claim 1, wherein: the device is a rotating torque thrust test device for initiating explosive devices. The sensor fixing seat (4) comprises a base plate (41), a side plate (42), and a vertical plate (43). The base plate (41) is provided with a plurality of waist-shaped holes (45) which are used to connect with the mounting plate (3). The installation position of the sensor fixing seat (4) can be adjusted through the waist-shaped holes (45) to ensure that the thrust sensor (5) is in close contact with the force transmission arm (71) of the force transmission frame (7). Two side plates (42) are triangular and connected with the vertical plate (43) respectively. The vertical plate (43) is provided with a bolt fixing hole (44) which is used to fix the thrust sensor (5). The mounting plate (3) is provided with a second fixed internal thread (33) on both sides which is used to connect with the waist-shaped hole (45) to install the sensor fixing seat (4) on the left side or the right side of the mounting plate (3).

7. The device of claim 1, wherein: the device is a rotating torque thrust test device for initiating explosive devices. The force transmission shaft (6) comprises a flange base (61), a fixed boss (62), and a cylindrical main body (63). The flange base (61) is connected with the explosive to be tested. The cylindrical main body (63) passes through the through hole (32) of the mounting plate (3) and is limited by the fixed boss (62).

8. The device according to claim 7, wherein: The diameter of the flange base (61) is 100-300 mm.

9. The device of claim 1, wherein: the device is a rotating torque thrust test device for initiating a pyrotechnic charge. The force transmission frame (7) comprises two force transmission arms (71), which are cross-symmetrically distributed, and a square hole (72) is arranged at the intersection of the force transmission arms (71), a square connecting column (65) is arranged on the force transmission shaft (6), the square hole (72) cooperates with the square connecting column (65) of the force transmission shaft (6) to realize the connection of the force transmission shaft (6) and the force transmission frame (7), and a fourth fixed external thread (66) is further arranged on the force transmission shaft (6), and the force transmission frame (7) is pressed and fixed after the fourth fixed external thread (66) is connected with a nut.

10. The device of claim 1, wherein: the device is a rotating torque thrust test device for initiating a pyrotechnic charge. Further comprising a fixing cylinder (8), a third fixed internal thread (81) is arranged on the fixing cylinder (8), a third fixed external thread (64) is arranged on the force transmission shaft (6), and the third fixed internal thread (81) and the third fixed external thread (64) cooperate to fix the force transmission shaft (6) on the mounting plate (3).

Images