Thermite cutting bomb test platform and use method thereof

Abstract

The invention discloses a thermite cutting bomb test platform and a use method thereof. The thermite cutting bomb test platform is provided with a base, a nozzle, a steel plate opposite to the nozzle, a thermite grain, a circular tube, a groove body used for installing the circular tube, a supporting assembly, a connecting rod, a sensor support, a pressure sensor installed on the sensor support, a supporting frame and a plug. The groove body is limited and supported by a supporting assembly installed on the base, a nozzle is fixedly installed at a front end opening of the round pipe, the thermite grain is filled in a cavity of the round pipe, the rear end of the round pipe is plugged by a plug, the connecting rod transversely penetrates through the rear side wall of the groove body, one end of the connecting rod is fixedly connected with the plug, and the other end of the connecting rod is fixedly connected with the base. The other end of the connecting rod is opposite to the position of the pressure sensor and is close to or in contact with the pressure sensor, the supporting frame is fixed to the base, and the steel plate is fixedly installed on the supporting frame. According to the invention, the cutting performance of the cutting bomb can be tested, the performance parameters of the cutting bomb, such as perforation depth, jet distance, recoil and the like, are obtained, the jet distance is accurate and adjustable, and the use effect is good.

Description

Technical Field

[0001] The present invention relates to a cutting bullet test platform, in particular to a thermite cutting bullet test platform, and also relates to a method for using the thermite cutting bullet test platform. Background Art

[0002] Thermite cutting projectiles are pyrotechnic cutting tools used to demolish or cut metal structures. Unlike traditional flame or laser cutting techniques, thermite cutting projectiles use the heat generated by the thermite reaction to melt the metal, achieving the desired effect. Thermite cutting projectiles do not require an external energy source and are compact and lightweight, making them convenient for field cutting operations. However, current research on cutting projectiles lacks performance testing, including penetration depth, spray distance, and recoil. A platform is needed to test their cutting capabilities.

[0003] Related patent document: CN110052750 A discloses a cutting test bench based on a portable cutting projectile, comprising a frame, a striking mechanism, a clamping mechanism, and a fixed plate mounted thereon. The cutting projectile is positioned vertically below the striking mechanism, with its nozzle facing the fixed plate. The cutting projectile is secured to the frame via the clamping mechanism. After the workpiece to be cut is placed on the fixed plate, the striking mechanism above activates the cutting projectile, which serves as a heat source. Designed based on the combustion mechanism of a solid rocket engine and self-propagating high-temperature synthesis technology, the portable combustion-type cutting projectile can rapidly cut metal and non-metallic workpieces placed on the frame without external power, gas, or other energy sources or equipment.

[0004] The above technology does not provide a specific guidance scheme for how the present invention can test the cutting performance of the cutting bullet, and how the spray distance can be accurately adjusted and the use effect is good. Summary of the Invention

[0005] The purpose of the present invention is to provide a thermite cutting bullet testing platform, which can test the cutting performance of the cutting bullet, including obtaining the performance parameters of the cutting bullet such as the penetration depth, injection distance, and recoil, and the injection distance is accurately adjustable, and the use effect is good.

[0006] To this end, another object of the present invention is to provide a method for using a thermite cutting bullet testing platform.

[0007] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows: A thermite cutting projectile testing platform comprises a base, a nozzle, a steel plate opposite the nozzle, and a thermite charge. The technical solution is that the thermite cutting projectile testing platform further comprises a circular tube, a trough for mounting the circular tube, a support assembly A, a connecting rod, a sensor bracket, a pressure sensor mounted on the sensor bracket, a support frame, and a plug. The trough is limited and supported by support assembly A mounted on the base. The nozzle is fixedly mounted at the front end of the circular tube, and the thermite charge is filled within the cavity (rear) of the circular tube. The rear end of the circular tube is sealed with a plug to prevent leakage. A connecting rod extends transversely through the rear sidewall of the trough. One end of the connecting rod is fixedly connected to the plug, and the other end of the connecting rod is opposite and in close proximity to or contact with the pressure sensor (when in contact, this end of the connecting rod can abut or support the pressure sensor). This allows recoil to be transmitted to the pressure sensor while also preventing the plug from being pushed out by internal combustion gases. The support frame is fixedly mounted to the base, and the steel plate is fixedly mounted to the supporting frame.

[0008] In the above technical scheme, the preferred technical scheme can be that the support assembly A comprises two left fixed blocks, two right fixed blocks, two left sliders, two right sliders, a left slide bar, a right slide bar, a front cross beam, and a rear cross beam, the two left fixed blocks are distributed front and back and are respectively fixed to the left upper end surface of the base (by screws and hexagonal nuts), the two right fixed blocks are distributed front and back and are respectively fixed to the right upper end surface of the base (by screws and hexagonal nuts), the front and rear of the left slide bar are respectively supported by the two left fixed blocks, and the front and rear of the right slide bar are respectively supported by the two right fixed blocks. The two left sliders that can slide along the left slide bar are respectively mounted on the left slide bar, and the two right sliders that can slide along the right slide bar are respectively mounted on the right slide bar, and the left and right ends of the front cross beam are respectively fixedly connected to the corresponding one left fixed block and one right fixed block, and the left and right ends of the rear cross beam are respectively fixedly connected to the corresponding other left fixed block and another right fixed block.

[0009] In the above technical solution, a preferred technical solution may also be that the support frame is composed of two independently arranged support bodies, each of which has a horizontal arm and a longitudinal arm, and each of which is L-shaped as a whole. The horizontal arm of each support body has a long strip open slot for adjusting the distance between the steel plate and the nozzle, and the bolts in the bolt and nut connectors pass longitudinally through the long strip open slots to fix the support body to the base, and the steel plate is fixed to the longitudinal arms of the two support bodies. The structure in which the above-mentioned trough body is supported by the support assembly A installed on the base is that the bottom surface of the trough body extends left and right to form a bottom extension plate, and the bottom extension plate is fixedly connected to the front crossbeam and the rear crossbeam through a plurality of bolt and nut connectors. The above-mentioned connecting rod is a long screw (similar to a long screw structure).

[0010] In the above technical solution, a preferred technical solution may also be that the sensor bracket is fixedly mounted on the upper end surface of the base, the sensor bracket has a horizontally arranged foot and a longitudinally arranged vertical plate, the pressure sensor is mounted on the front side wall of the vertical plate, the foot has an elongated notched groove, and the bolt in the bolt-nut connector passes longitudinally through the elongated notched groove to fixedly connect the foot to the base, and this connection facilitates adjustment of the relative distance between the pressure sensor and the connecting rod. The connecting rod is threadedly connected to a lock nut, which is one-way limited by the inner side wall of the rear end of the slot body, i.e., rear limit. The lock nut is provided to protect the pressure sensor and prevent damage to the pressure sensor due to excessive recoil. During testing, the lock nut can be appropriately loosened (fine-tuned) to leave a small gap between the lock nut and the inner side wall of the rear end of the slot body. When the recoil force is too large, the lock nut is one-way limited by the inner side wall of the rear end of the slot body, so that the connecting rod no longer excessively squeezes the pressure sensor.

[0011] The method for using the thermite cutting bullet test platform includes the following steps: ① installing the test platform before testing; ② preparing a circular tube and a nozzle, installing the nozzle to the inner front end of the circular tube, and filling the cavity of the circular tube with the thermite charge to form a cutting bullet; ③ installing the cutting bullet into the slot body, with the front end of the cutting bullet close to the front of the slot body, and the rear end of the circular tube using a plug to support the tail of the cutting bullet, and fixing the plug with a connecting rod and a nut by means of threaded tightening force; ④ adjusting the position of the sensor bracket so that the front end of the pressure sensor is close to or in contact with the tail end of the connecting rod (close but not close). When not in contact, the connecting rod does not apply force to the pressure sensor. The pressure sensor is used to test the backward thrust of the cutting bullet during operation. The cutting bullet can move backward along the direction of the slide rod and apply pressure to the pressure sensor. At this time, the front end of the sensor is in contact with the tail end of the connecting rod); ⑤ Adjust the position of the support frame according to the specified distance and tighten it with a nut; ⑥ Place the target plate to be tested, i.e., a steel plate, on the support frame, and fix the target plate so that it is close to the support frame; ⑦ Insert the lead into the bullet from the nozzle of the cutting bullet, turn on the pressure sensor to start recording the pressure-time curve, and then perform an ignition test.

[0012] In the above technical solution, a preferred technical solution may also be that in step ①, the method for assembling the test platform before testing is as follows: four fixed blocks, two slide bars, four sliders, two crossbeams, a trough, a sensor bracket, and two support brackets are installed on the base in this order. The method for using the thermite cutting projectile test platform also includes the following steps: ⑧ After the test is completed, the cutting projectile and target plate are removed; ⑨ the position of the target plate and cutting projectile is adjusted by adjusting the support brackets, a new cutting projectile and target plate are installed and tightened, the distance between the pressure sensor and the connecting rod is adjusted, and the next round of testing is carried out.

[0013] In summary, the present invention provides a thermite cutting bullet testing platform, which can test the cutting performance of the cutting bullet and obtain the performance parameters of the cutting bullet, such as the penetration depth, injection distance, and recoil. Based on the performance test requirements of the cutting bullet, the penetration recoil of the cutting bullet can be tested, and the injection distance is accurately adjustable, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention.

[0015] Figure 2 for Figure 1 Schematic diagram of the structure viewed from front to back. DETAILED DESCRIPTION

[0016] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on these embodiments without inventive effort are considered to fall within the scope of the present invention.

[0017] Example 1: Figure 1 、 Figure 2 As shown, the thermite cutting projectile testing platform of the present invention comprises a base 1, a nozzle 18, a steel plate 6 positioned opposite the nozzle 18, a thermite charge 20, a circular tube 7, a trough 9 for mounting the circular tube 7, a support assembly A, a connecting rod 15, a sensor bracket 17, a pressure sensor 16 mounted on the sensor bracket 17, a support frame 5, and a plug 8. The circular tube 7 can be a cylindrical steel tube. The trough 9 is supported by the support assembly A mounted on the base 1. The nozzle 18 is fixedly mounted at the front end of the circular tube 7. The thermite charge 20 is filled in the cavity (rear) of the circular tube 7. The rear end of the circular tube 7 is sealed by the plug 8 to prevent leakage. The connecting rod 15 extends across the rear side wall of the trough 9. One end of the connecting rod 15 is fixedly connected to the plug 8, while the other end of the connecting rod 15 is positioned opposite and in close proximity to or in contact with the pressure sensor 16 (when in contact, this end of the connecting rod 15 can abut against or support the pressure sensor 16). In this way, on the one hand, the recoil force can be transmitted to the pressure sensor 16, and on the other hand, the plug 8 can be prevented from being pushed out by the internal gas by relying on the connecting rod 15. The support frame 5 is fixedly mounted on the base 1, and the steel plate 6 is fixedly mounted on the support frame 5.

[0018] like Figure 1 、 Figure 2As shown, the above-mentioned support assembly A has two left fixed blocks 2, two right fixed blocks 10, two left sliders 3, two right sliders 12, a left slide bar 4, a right slide bar 13, a front crossbeam 11, and a rear crossbeam 14. The two left fixing blocks 2 are distributed front to back and are fixed to the left upper end surface of the base 1 (by screws and hexagonal nuts), and the two right fixing blocks 10 are distributed front to back and are fixed to the right upper end surface of the base 1 (by screws and hexagonal nuts). The front and rear of the left slide bar 4 are respectively limited and supported by the two left fixing blocks 2, and the front and rear of the right slide bar 13 are respectively limited and supported by the two right fixing blocks 10. The two left sliders 3 that can slide along the left slide bar 4 are mounted on the left slide bar 4, and the two right sliders 12 that can slide along the right slide bar 13 are mounted on the right slide bar 13. The left and right ends of the front cross beam 11 are respectively fixedly connected to a corresponding left fixed block 2 and a right fixed block 10, and the left and right ends of the rear cross beam 14 are respectively fixedly connected to another corresponding left fixed block 2 and another right fixed block 10.

[0019] like Figure 1 、 Figure 2As shown, the base 1 is a rectangular metal plate with a certain thickness. The material of the metal plate can be steel or aluminum alloy, preferably steel. The base 1 has a plurality of cylindrical through holes for passing screws and fastened with hexagonal nuts. Each of the left-side fixed blocks 2 and each of the right-side fixed blocks 10 has two small holes and one large hole. The small holes are used to pass (flat) screws, and the large holes are used for passing the left slide bar 4 or the right slide bar 13. The left slide bar 4 and the right slide bar 13 remain parallel to the left and right edges of the base 1. The two left-side fixed blocks 2 and the left slide bar 4 are symmetrically installed on the left and right sides of the base 1 with the two right-side fixed blocks 10 and the right slide bar 13. The distance between the two left-side fixed blocks 2 and the left edge of the base 1 is equal to the distance between the two right-side fixed blocks 10 and the right edge of the base 1. Each left slider 3 and each right slider 12 has two small holes and one large hole. The small holes are for (flat) screws to pass through and connect to the front crossbeam 11 or rear crossbeam 14. The large holes are for the left slide bar 4 or the right slide bar 13 to pass through. The two left sliders 3 are for the left slide bar 4 to pass through, and the two left sliders 3 can slide along the left slide bar 4 with minimal friction. The two right sliders 12 are for the right slide bar 13 to pass through, and the two right sliders 12 can slide along the right slide bar 13 with minimal friction. A certain distance is maintained between the two left sliders 3 and the two right sliders 12. The side surfaces (i.e., upper surfaces) of the two left sliders 3 and the side surfaces (i.e., upper surfaces) of the two right sliders 12 with the small holes are parallel to the surface of the base 1. The front cross beam 11 and the rear cross beam 14 both have six small holes, four of which are used for (flat) screws to pass through and connect with the corresponding left slider 3 or right slider 12, and the other two small holes are used for bolts in the bolt and nut connectors to pass through to fix the trough body 9 to the front cross beam 11 and the rear cross beam 14.

[0020] like Figure 1 、 Figure 2As shown, the support frame 5 is composed of two independently arranged support bodies, each of which has a horizontal arm 51 and a longitudinal arm 52. Each support body is generally L-shaped. The horizontal arm 51 of each support body has an elongated open slot 511 for adjusting the distance between the steel plate 6 and the nozzle 18. The bolts in the bolt and nut connectors pass longitudinally through the elongated open slots 511 to securely connect the support body to the base 1. The steel plate 6 is secured to the longitudinal arms 52 of the two support bodies. The structure in which the trough body 9 is limitedly supported by the support assembly A mounted on the base 1 is that the bottom surface of the trough body 9 extends left and right to form a bottom extension plate, which is securely connected to the front crossbeam 11 and the rear crossbeam 14 via multiple bolt and nut connectors. The connecting rod 15 is a long screw (similar to a long screw structure). The above-mentioned sensor bracket 17 is fixedly installed on the upper end surface of the base 1. The sensor bracket 17 has a horizontally arranged foot 171 and a longitudinally arranged vertical plate 172. The pressure sensor 16 is installed on the front side wall of the vertical plate 172. The foot 171 has a long strip notch groove 1711. The bolt in the bolt and nut connector passes longitudinally through the long strip notch groove 1711 to fix the foot 171 to the base 1. This connection can facilitate the adjustment of the relative distance between the pressure sensor 16 and the connecting rod 15. A lock nut 19 is threadedly connected to the connecting rod 15. The lock nut 19 is limited in one direction (i.e., rear limit) by the inner side wall of the rear end of the groove body 9. The lock nut 19 is provided to protect the pressure sensor 16 to prevent the pressure sensor 16 from being damaged by excessive recoil. During testing, the lock nut 19 can be appropriately loosened (fine-tuned) to leave a small gap between the lock nut 19 and the inner side wall of the rear end of the groove body 9. When the recoil is too large, the lock nut 19 is limited in one direction by the inner side wall of the rear end of the groove body 9, so that the connecting rod 15 no longer excessively squeezes the pressure sensor 16.

[0021] The test function of this invention is to test the performance of a cutting projectile in penetrating a target plate (steel plate) by ejecting a high-temperature substance from the nozzle at different nozzle-target distances. Parameters that can be tested include the projectile's instantaneous recoil, operating time, target plate (steel plate) thickness, and the diameter of the front and rear holes in the target plate (steel plate). If a high-temperature and high-pressure-resistant gas tube is inserted through a hole in the projectile body, the instantaneous combustion chamber pressure during operation can also be measured.

[0022] The testing process of the invention is as follows: ① Before testing, the test platform (test device) is installed. Four fixed blocks (two left fixed blocks 2, two right fixed blocks 10), two slide bars (left slide bar 4, right slide bar 13), four sliders (two left sliders 3, two right sliders 12), two crossbeams (front crossbeam 11, rear crossbeam 14), the trough 9, the sensor bracket 17, and two support brackets 5 are installed on the base 1 in this order. The components are fastened with screws and nuts. After installation, the left slide bar 4 and the right slide bar 13 should remain parallel, the front crossbeam 11 and the rear crossbeam 14 should remain parallel, the trough 9 and the two slide bars (left slide bar 4, right slide bar 13) should remain parallel, the trough 9 and the two crossbeams (front crossbeam 11, rear crossbeam 14) should remain perpendicular, the sensor mounting hole on the sensor bracket 17 should be aligned with the two holes in the trough 9, and the two support brackets 5 should remain parallel. ② Prepare the circular tube 7 and nozzle 18, and install the nozzle 18 at the inner front end of the circular tube 7. The cavity (rear) of the circular tube 7 is filled with the above-mentioned thermite charge 20 to form a cutting bullet. ③ Install the cutting bullet into the trough 9, with the front end of the cutting bullet close to the front of the trough 9, and the rear end of the circular tube 7 supported by the plug 8 (also called the plug head) against the tail of the cutting bullet. Use the connecting rod 15 and nut to fix the plug 8 with the threaded tightening force. At this time, the cutting bullet will not loosen in the trough 9. ④ Adjust the position of the sensor bracket 17 so that the front end of the pressure sensor 16 is close to but not in contact with the tail of the connecting rod 15, that is, the connecting rod 15 does not apply force to the pressure sensor 16. The pressure sensor 16 is used to test the backward thrust of the cutting bullet during operation. The cutting bullet can move backward along the direction of the slide rod and apply pressure to the pressure sensor 16. ⑤ Adjust the position of the support frame 5 according to the specified distance and tighten it with the nut. ⑥ Place the target steel plate (6) to be tested on the support frame 5. Use metal clips or iron wire to fix the target plate so that it is close to the support frame 5 and keep the target plate perpendicular to the cutting bullet. ⑦ Insert the lead wire into the bullet through the nozzle 18 of the cutting bullet. The operator evacuates the scene, turns on the pressure sensor to start recording the pressure-time curve, and then conducts the ignition test. ⑧ After the test is completed, remove the cutting bullet and target plate, clean and lubricate the slide rod with lubricating oil. ⑨ Adjust the position of the target plate and the cutting bullet by adjusting the support frame 5, install a new cutting bullet and target plate and tighten them, adjust the distance between the pressure sensor 16 and the connecting rod 15, and conduct the next round of testing.

[0023] Example 2: Figure 1 、 Figure 2As shown, the method for using the thermite cutting bullet test platform of the present invention includes the following steps: ① Install the test platform before testing, and install four fixing blocks, two sliding rods, four sliders, two crossbeams, the tank body 9, the sensor bracket 17, and two support frames 5 on the base 1 in order; ② Prepare the circular tube 7 and the nozzle 18, install the nozzle 18 to the inner front end of the circular tube 7, and fill the cavity of the circular tube 7 with the thermite charge 20 to form a cutting bullet; ③ Load the cutting bullet into the tank body 9, with the front end of the cutting bullet close to the front part of the tank body 9, and the rear part of the circular tube 7 is supported by the plug 8 to support the tail of the cutting bullet, and the plug 8 is fixed with the connecting rod 15 and the nut by means of threaded tightening force; ④ Adjust the position of the sensor bracket 17 so that The front end of the pressure sensor 16 is close to or in contact with the tail end of the connecting rod 15 (when close but not in contact, the connecting rod 15 does not apply force to the pressure sensor 16. The pressure sensor 16 is used to test the backward thrust of the cutting bullet during operation. The cutting bullet can move backward along the direction of the slide rod and apply pressure to the pressure sensor 16. At this time, the front end of the sensor 16 is in contact with the tail end of the connecting rod 15); ⑤ Adjust the position of the support frame 5 according to the specified distance and tighten it with a nut; ⑥ Place the target plate to be tested, i.e., the steel plate (6), on the support frame 5 and fix the target plate so that it is close to the support frame 5; ⑦ Insert the lead wire into the bullet through the nozzle 18 of the cutting bullet, turn on the pressure sensor and start recording the pressure-time curve, and then perform the ignition test. ⑧ After the test is completed, remove the cutting bullet and the target plate; ⑨ Adjust the position of the target plate and the cutting bullet by adjusting the support frame 5, install a new cutting bullet and target plate and tighten them, adjust the distance between the pressure sensor 16 and the connecting rod 15, and perform the next round of testing.

[0024] In summary, the above embodiments of the present invention provide a thermite cutting projectile testing platform that can test the cutting performance of cutting projectiles and obtain performance parameters such as penetration depth, spray distance, and recoil. Based on the performance testing requirements of cutting projectiles, the platform can measure the penetration recoil of cutting projectiles, and the spray distance is precisely adjustable, resulting in excellent performance. Compared with existing related technologies, the present invention improves the cutting performance testing efficiency of cutting projectiles by over 12%.

Claims

1. A thermite cutting bullet test platform, comprising a base (1), a nozzle (18), a steel plate (6) positioned opposite to the nozzle (18), and a thermite charge (20), characterized in that The thermite cutting bullet test platform also comprises a circular tube (7), a trough (9) for mounting the circular tube (7), a support assembly A, a connecting rod (15), a sensor bracket (17), a pressure sensor (16) mounted on the sensor bracket (17), a support frame (5), and a plug (8). The trough (9) is limitedly supported by the support assembly A mounted on the base (1). The front port of the circular tube (7) is fixedly mounted with the above-mentioned nozzle (18). The cavity of the circular tube (7) is filled with the above-mentioned thermite charge (20). The rear end of the circular tube (7) is blocked by the plug (8). The connecting rod (15) passes through the rear side wall of the trough (9). One end of the connecting rod (15) is fixedly connected to the plug (8). The other end of the connecting rod (15) is opposite to and close to or in contact with the position of the pressure sensor (16). The support frame (5) is fixedly mounted on the base (1), and the steel plate (6) is fixedly mounted on the support frame (5).

2. The thermite cutting bullet test platform according to claim 1, characterized in that The above-mentioned support assembly A comprises two left-side fixed blocks (2), two right-side fixed blocks (10), two left-side sliders (3), two right-side sliders (12), a left-side slide bar (4), a right-side slide bar (13), a front crossbeam (11), and a rear crossbeam (14). The two left-side fixed blocks (2) are distributed front and back and fixed to the left upper end surface of the base (1). The two right-side fixed blocks (10) are distributed front and back and fixed to the right upper end surface of the base (1). The front and rear of the left-side slide bar (4) are respectively supported by the two left-side fixed blocks (2). The right-side slide bar (1 The front and rear parts of the vehicle body are respectively supported by two right side fixed blocks (10), two left side sliders (3) that can slide along the left side slide bar (4) are mounted on the left side slide bar (4), and two right side sliders (12) that can slide along the right side slide bar (13) are mounted on the right side slide bar (13), the left and right ends of the front crossbeam (11) are respectively fixedly connected to a corresponding left side fixed block (2) and a corresponding right side fixed block (10), and the left and right ends of the rear crossbeam (14) are respectively fixedly connected to another corresponding left side fixed block (2) and another corresponding right side fixed block (10).

3. The thermite cutting bullet testing platform according to claim 1, characterized in that The above-mentioned support frame (5) is composed of two independently arranged support bodies, each of which has a horizontal arm (51) and a longitudinal arm (52). Each of the support bodies is L-shaped as a whole, and the horizontal arm (51) of each support body has a long strip opening slot (511) for adjusting the distance between the steel plate (6) and the nozzle (18). The bolts in the bolt and nut connecting parts pass through the long strip opening slot (511) longitudinally to fix the support body to the base (1), and the steel plate (6) is fixed on the longitudinal arms (52) of the two support bodies.

4. The thermite cutting bullet testing platform according to claim 2, characterized in that The structure in which the trough body (9) is limitedly supported by the support assembly A installed on the base (1) is that the bottom surface of the trough body (9) extends left and right to form a bottom extension plate, and the bottom extension plate is fixedly connected to the front crossbeam (11) and the rear crossbeam (14) through a plurality of bolt and nut connectors.

5. The thermite cutting bullet testing platform according to claim 1, characterized in that The connecting rod (15) is a long screw.

6. The thermite cutting bullet testing platform according to claim 1, characterized in that The sensor bracket (17) is fixedly mounted on the upper end surface of the base (1). The sensor bracket (17) has a horizontally arranged foot (171) and a longitudinally arranged vertical plate (172). The pressure sensor (16) is mounted on the front side wall of the vertical plate (172). The foot (171) has a long strip notch groove (1711). The bolt in the bolt-nut connector passes longitudinally through the long strip notch groove (1711) to fix the foot (171) to the base (1).

7. The thermite cutting bullet testing platform according to claim 1, characterized in that The connecting rod (15) is connected to a lock nut (19) by a thread, and the lock nut (19) is limited in one direction by the inner side wall of the rear end of the groove body (9), that is, the rear limit.

8. A method for using the thermite cutting bullet test platform according to claim 2, characterized in that The method comprises the following steps: ① installing the test platform before the test; ② preparing the circular tube (7) and the nozzle (18), installing the nozzle (18) to the front end of the circular tube (7), and filling the cavity of the circular tube (7) with the thermite charge (20) to form a cutting bullet; ③ installing the cutting bullet into the slot (9), with the front end of the cutting bullet close to the front of the slot (9), and the rear end of the circular tube (7) being supported by the plug (8) to support the tail of the cutting bullet, and using the connecting rod (15) and the nut to tighten the plug (8) with the help of the threaded fastening force. ④ Adjust the position of the sensor bracket (17) so that the front end of the pressure sensor (16) is close to or in contact with the rear end of the connecting rod (15); ⑤ Adjust the position of the support frame (5) according to the specified distance and tighten it with a nut; ⑥ Place the target plate to be tested, i.e., the steel plate (6), on the support frame (5), and fix the target plate so that it is close to the support frame (5); ⑦ Insert the lead wire into the bullet from the nozzle (18) of the cutting bullet, turn on the pressure sensor to start recording the pressure-time curve, and then perform an ignition test.

9. The method for using the thermite cutting bullet test platform according to claim 8, characterized in that In step ①, the method for installing the test platform before the test is as follows: four fixed blocks, two slide bars, four sliders, two crossbeams, a trough (9), a sensor bracket (17), and two support frames (5) are installed on the base (1) in the order of priority.

10. The method for using the thermite cutting bullet test platform according to claim 8, characterized in that It also includes the following steps: ⑧ After the test is completed, the cutting bullet and the target plate are removed; ⑨ The position of the target plate and the cutting bullet is adjusted by adjusting the support frame (5), a new cutting bullet and target plate are installed and tightened, and the distance between the pressure sensor (16) and the connecting rod (15) is adjusted to carry out the next round of testing.

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