CN117783206B - Test system and method for evaluating warm-pressing explosive function - Google Patents

Abstract

The invention relates to a testing system and a testing method for evaluating the working capacity of warm-pressing explosive, belongs to the technical field of explosive performance testing, and solves the problems of incomplete evaluation of the working capacity of the warm-pressing explosive and poor accuracy. The invention adopts a closed test box to simulate the detonation environment of the grain to be tested, and a first equivalent target plate and a second equivalent target plate are arranged on the wall surface, and the second equivalent target plate is arranged on the outer side end surface of the shock wave isolation cabin; the middle part of the pressure guiding plate of the shock wave isolation cabin is provided with a pressure guiding cabin extending to the inside of the cavity cabin, and the side surface of the pressure guiding cabin is provided with a plurality of pressure guiding holes; the shock wave is filtered through the pressure guide plate, and the quasi-static pressure of the post-combustion effect is conducted through the pressure guide hole; monitoring the temperature and quasi-static pressure inside the exploded tank body through a sensor; according to the invention, the impact of the detonation wave alignment static pressure measurement precision of the detonation wave of the shock wave isolation cabin is filtered, so that the direct impact of detonation products of the warm-pressure explosive and the post-combustion effect of the detonation products of the warm-pressure explosive are effectively evaluated.

Description

Test system and method for evaluating warm-pressing explosive function

Technical Field

The invention relates to the technical field of explosive performance testing, in particular to a testing system and method for evaluating the functional capacity of a warm-pressing explosive.

Background

Currently, high energy metal particles are often added to explosives to extend their energy release time, enhancing the destructive effect. The explosive has obvious post-combustion effect compared with the traditional explosive. In the process of releasing detonation energy of the explosive, the metal powder reacts with detonation products to release a large amount of heat, so that the action time of shock waves is prolonged, and the functional capacity of the explosive is improved. The work-doing characteristics of the explosive are fully known, and support can be provided for optimizing the energy output structure of the aluminum-containing explosive and researching the damage effect. The method for efficiently and accurately evaluating the working capacity of the warm-pressing explosive is a hot spot for research at the present stage.

The existing explosive-driven metal cylinder experiment is a standard method for evaluating the functional capability of an explosive. However, the effective action time of the metal drive experiment is shorter and is usually not more than 100 mu s, and the acting process under the post-effect of the metal powder in the warm-pressing explosive is difficult to characterize, so that the evaluation of the acting force obtained by the test is incomplete. For warm-pressing explosives with obvious post-combustion effect, the space and time scale required by the post-effect of metal powder are larger, and the traditional methods such as cylinder test and the like cannot accurately evaluate the working capacity of the explosives.

The scholars put forward a closed space explosion test device and a method, and the temperature-pressure type explosive effect is estimated by measuring physical parameters such as internal overpressure, quasi-static pressure, temperature, final deformation of a target plate and the like. The method has the space and time conditions required by the post-combustion reaction of the metal powder, but has great influence on accurate measurement and reading of quasi-static pressure under the post-combustion effect under the influence of the overpressure peak value of the initial shock wave, and the final deformation cannot accurately represent the working capacity of the explosive due to the dynamic response difference of the target plate, and cannot represent the working capacity of the metal powder and the detonation product under the post-combustion effect.

Therefore, it is desirable to provide a test system and an evaluation method for functional assessment of warm-pressed explosives.

Disclosure of Invention

In view of the above analysis, the invention aims to provide a testing system and an evaluation method for evaluating the functional capability of a warm-pressure explosive, which are used for solving the problems of incomplete evaluation of the working capability of the warm-pressure explosive and poor accuracy of the existing explosive working evaluation method.

The aim of the invention is mainly realized by the following technical scheme:

A test system for evaluating warm-pressed explosive functioning, comprising: the device comprises a closed test box, a shock wave isolation cabin, a first equivalent target plate, a second equivalent target plate, a laser displacement sensor, a quasi-static pressure sensor, a wall pressure sensor and a thermocouple temperature sensor;

The closed test box is used for simulating the explosion environment of the grain to be tested; a first test port is formed in one side surface of the closed test box, and the first equivalent target plate is arranged at the first test port; a second test port is formed in the other side face of the closed test box, the shock wave isolation cabin is fixedly installed at the second test port, and the second equivalent target plate is installed on an outer flange of the shock wave isolation cabin;

The shock wave isolation capsule comprises: a ballast guide plate and a cavity; the pressure guiding cabin plate and the cavity cabin are fixedly connected with the closed test box, the middle part of the pressure guiding cabin plate is provided with a pressure guiding cabin extending to the inside of the cavity cabin, and the side surface of the pressure guiding cabin is provided with a plurality of pressure guiding holes; the cavity cabin is fixedly arranged on the outer side of the pressure guiding cabin plate, is of an annular structure and is provided with a second equivalent target plate at a port;

The laser displacement sensors are provided with two groups and are respectively used for monitoring the deformation of the first equivalent target plate and the second equivalent target plate; the wall pressure sensor is fixedly arranged on the closed test box; the side surface of the cavity cabin is provided with a quasi-static pressure sensor; thermocouple temperature sensors are arranged on the wall surface of the closed test box and on the side surface of the cavity cabin.

Further, the second equivalent target plate is arranged parallel to the guide ballast plate; the bottom plate of the guide pressure cabin is parallel to the side wall plate of the closed test box, and the guide pressure cabin can filter shock waves generated after the explosive column to be tested is detonated; a quasi-static pressure cavity is formed among the pressure guide plate, the cavity cabin and the second equivalent target plate; the pressure guide hole can be communicated with the inner cavity of the closed test box and the quasi-static pressure cavity, so that the quasi-static pressure of the closed test box and the quasi-static pressure cavity can be balanced.

Further, a load uniform distribution plate is arranged between the guide cabin plate and the second equivalent target plate, and is parallel to the second equivalent target plate and the guide cabin plate and fixedly connected with the cavity cabin; a plurality of pressure equalizing air holes are uniformly formed in the load uniform distribution plate; the pressure equalizing air holes are used for uniformly distributing and filtering the high-pressure gas entering the quasi-static pressure cavity from the pressure guiding holes.

Further, a plurality of pressure guiding structures are installed to different positions on the wall surface of the airtight test box, the pressure guiding structures include: the device comprises a pressure guide pipe, an outer cylinder and a flange end cover; one end of the pressure guide pipe is communicated with the inner space of the closed test box, the other end of the pressure guide pipe is closed, and the side surface of the pressure guide pipe is provided with an opening; the outer cylinder is covered outside the impulse pipe, one end of the outer cylinder is in sealing connection with the outer side wall surface of the closed test box, and the other end of the outer cylinder is connected with the flange end cover.

Further, an oxygen concentration sensor and a high-pressure air guide hole are also arranged on the wall surface of the closed test box; two high-pressure air guide holes are formed in one group, and at least one group is arranged; the high-pressure air guide hole is internally provided with a high-pressure air guide pipe which is used for connecting a high-pressure air cylinder so as to replace gas components in the closed test box or adjust the proportion of gas; the oxygen concentration sensor is used for monitoring the oxygen concentration in the closed test box.

Further, the method further comprises the following steps: a multichannel dynamic acquisition instrument and a computer; the laser displacement sensor, the quasi-static pressure sensor, the wall pressure sensor, the thermocouple temperature sensor and the oxygen concentration sensor are all connected with the multichannel dynamic acquisition instrument; the multichannel dynamic acquisition instrument is connected with a computer, and then information acquired by a plurality of sensors can be transmitted to the computer for processing.

The method for evaluating the warm-pressing explosive as the functional capability adopts the test system for evaluating the warm-pressing explosive as the functional capability, and comprises the following steps:

Step S1: manufacturing a grain to be tested according to the type of the explosive to be evaluated, and adopting a charging grain added with inert LiF to replace metal as a control charging;

step S2: the method comprises the steps of installing a first equivalent target plate and a second equivalent target plate on a closed test box, sealing the closed test box, respectively loading control charge and a to-be-tested explosive column into the closed test box for detonation, and calibrating the thicknesses of the first equivalent target plate and the second equivalent target plate to obtain standard target plates of the first equivalent target plate and the second equivalent target plate;

Step S3: manufacturing a plurality of groups of equivalent target plates by taking the thickness of the standard target plate as a reference; a first equivalent target plate is fixedly arranged on the side wall of the closed test box, and a second equivalent target plate is arranged on the shock wave isolation cabin; loading the grain to be tested into a closed test box for detonation; according to deflection deformation curves of the first equivalent target plate and the second equivalent target plate, which are measured by a laser displacement sensor, and by combining the temperature, the wall pressure and the quasi-static pressure of the closed test box, which are measured by a thermocouple temperature sensor, a wall pressure sensor and a quasi-static pressure sensor, analyzing and calculating the total acting capacity of the detonation process of the to-be-measured explosive column and the acting capacity of the quasi-static pressure under the afterburning effect;

Step S4: repeating the steps S1 to S3 for repeated tests, and carrying out functional assessment on the charges with different formulas.

Further, in the step S2, in the calibration process, on the premise that no break appears in the equivalent target plate, the target plate thickness corresponding to the maximum deformation difference value of the equivalent target plate under the action of the implosion of the control charge and the grain to be tested is used as the standard target plate for evaluating the functional force of the current explosive formula.

Further, in step S4, gases with different components are injected into the closed test chamber through the high-pressure air-guide hole arranged on the wall surface of the closed test chamber, the gas proportion is adjusted, meanwhile, the oxygen concentration sensor is used for measuring the internal oxygen concentration, when the oxygen concentration in the closed test chamber is lower than that in the air, the grain to be tested is detonated, the obtained maximum deflection of the center of the equivalent target plate in the low-oxygen state is compared with the maximum deflection of the center of the equivalent target plate measured in the air environment, and the difference value of the maximum deflection and the maximum deflection is used for representing the inhibiting effect of different oxygen environments on the afterburning effect of the temperature-pressure explosive and the influence on the total function of the grain to be tested.

Further, in step S4, by opening flange end caps of pressure guiding structures with different numbers or different positions, explosion environments with different communication degrees are formed, and then explosive grains with different formulas are detonated for testing; and obtaining the maximum deflection of the centers of the equivalent target plate and the equivalent target plate, comparing the maximum deflection of the centers of the equivalent target plate measured in a closed state of the closed test box, and representing the influence of different pressure relief conditions on the functional force of the warm-pressing explosive by adopting the difference value of the maximum deflection of the centers of the equivalent target plate and the equivalent target plate.

The technical scheme of the invention can at least realize one of the following effects:

1. According to the testing system for evaluating the functional force of the warm-pressing explosive, aiming at the requirements of evaluating the functional force of the warm-pressing explosive and the defects existing in the prior art, the first equivalent target plate and the second equivalent target plate are arranged on the closed test box, the first equivalent target plate directly bears explosion shock waves after explosion, the second equivalent target plate is arranged on the outer side of the shock wave isolation cabin and only bears quasi-static pressure shock, and the total explosion power of Wen Yaxing explosive in the closed space and the quasi-static pressure power under the combustion effect of metal powder, detonation products and oxygen can be evaluated simultaneously by monitoring the deflection of the two equivalent target plates and monitoring the temperature and the pressure after explosion.

2. According to the testing system for evaluating the functional force of the warm-pressing explosive, the plurality of pressure guide structures with the effect of filtering shock waves are arranged, the quasi-static pressure sensor is arranged on the pressure guide structures, and the sensor is not directly impacted by initial shock waves and detonation products through the pressure guide structures, so that the quasi-static pressure under the post-combustion effect is accurately and effectively measured. And meanwhile, the sealing and opening states of the mounting holes of the standby pressure guide structure are adjusted, so that the explosion effect of the sealed test box in the state of the pressure relief holes can be tested.

3. The warm-pressing explosive function evaluation method provides a quantitative and visual evaluation means for the warm-pressing explosive function, is not limited by the types of matrix explosive and metal powder, has extremely high universality and applicability, and provides references for warm-pressing type explosive formulation design and application research of the warm-pressing explosive.

In the invention, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, like reference numerals being used to designate like parts throughout the drawings;

FIG. 1 is a schematic diagram of a test system for evaluating the capability of warm-blooded explosives provided in embodiment 1 of the present invention;

FIG. 2 is a schematic structural view of a closed test chamber according to embodiment 1 of the present invention;

FIG. 3 is a schematic view of the front wall structure of the closed test chamber according to embodiment 1 of the present invention;

FIG. 4 is a schematic view of the structure of the left wall of the closed test chamber according to embodiment 1 of the present invention;

FIG. 5 is a schematic view of the right wall structure of the closed test chamber according to embodiment 1 of the present invention;

FIG. 6 is a schematic view of the structure of the rear wall of the closed test chamber according to embodiment 1 of the present invention;

FIG. 7 is a cross-sectional view of a shock wave isolation chamber of a closed test chamber provided in example 1 of the present invention;

FIG. 8 is a cross-sectional view of a load distribution plate of the closed test chamber according to embodiment 1 of the present invention;

FIG. 9 is a cross-sectional view of the pressure guiding structure of the closed test chamber according to embodiment 1 of the present invention;

FIG. 10 is a cross-sectional view of a sensor mount provided in embodiment 1 of the present invention;

Fig. 11 is a schematic structural view of a guide chamber with a double-layered filter plate according to embodiment 2 of the present invention.

Reference numerals:

1-a closed test box; 2-a multichannel dynamic acquisition instrument; 3-an initiator; 4-a computer; 5-shock wave isolation capsule; 6-a first equivalent target plate; 7-a second equivalent target plate; 8-a pressure guiding structure; 9-a grain to be tested; 10-a laser displacement sensor; 11-a quasi-static pressure sensor; 12-wall pressure sensor; 13-thermocouple temperature sensor; 14-oxygen concentration sensor; 15-high-pressure air guide holes; 16-a sensor mount;

101-sealing the door; 102-a first sensor mounting hole; 103-mounting holes of the pressure guide structure; 104-reinforcing rib plate

501-A ballast guide plate; 502-cavity compartment; 503-target mounting flange; 504-load uniform distribution plate; 505-heat pipes; 506-a second sensor mounting hole; 507-guiding the ballast; 508-a pressure guiding hole; 509—a middle opening; 510-a first filter plate; 511-a second filter plate; 512-a third filter plate; 513-a first leg; 514-a second leg;

801-impulse pipe; 802-outer cylinder; 803-flange end cap; 804-a third sensor mounting hole;

161-a support sleeve; 162-fixing the nut; 163-insulating bushing; 164-insulating pad.

Detailed Description

The following detailed description of preferred embodiments of the invention is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the invention, are used to explain the principles of the invention and are not intended to limit the scope of the invention.

Example 1

In one embodiment of the present invention, a test system for evaluating the functioning of a warm-blooded explosive is disclosed, as shown in fig. 1 and 2, comprising: the device comprises a closed test box 1, a shock wave isolation cabin 5, a first equivalent target plate 6, a second equivalent target plate 7, a laser displacement sensor 10, a quasi-static pressure sensor 11, a wall pressure sensor 12 and a thermocouple temperature sensor 13; the closed test box 1 is used for simulating the detonation environment of the grain 9 to be tested; a first test port is formed in one side surface of the closed test box 1, and the first equivalent target plate 6 is arranged at the first test port; a second test port is formed in the other side face of the closed test box 1, the shock wave isolation cabin 5 is fixedly mounted at the second test port, and the second equivalent target plate 7 is mounted on the outer side face of the shock wave isolation cabin 5.

As shown in fig. 1 and 2, the closed test chamber 1 has a closed cubic structure in which a first equivalent target plate 6, a second equivalent target plate 7, and various sensors can be arranged.

As shown in fig. 2, the shock wave isolation cabin 5 protrudes out of the outer surface of the closed test chamber 1, and at least two second sensor mounting holes 506 are formed on the side surface; the second sensor mounting holes 506 are used for mounting the quasi-static pressure sensor 11 and the thermocouple temperature sensor 13 for monitoring the quasi-static pressure and the real-time temperature in the shock wave isolation capsule 5, respectively.

As shown in fig. 3, a first test port is formed in the front wall surface of the closed test box 1, and the first test port is connected with a first equivalent target plate 6 in a sealing manner through bolts, and the deformation condition of the first equivalent target plate 6 is used for evaluating the total working capacity of the explosive.

As shown in fig. 4, a second test port is arranged on the left wall surface of the closed test box 1, a shock wave isolation cabin 5 is installed at the second test port, a guide cabin 507 is arranged in the shock wave isolation cabin 5, shock waves can be isolated, quasi-static pressure can be conducted, a second equivalent target plate 7 is installed at the port of the shock wave isolation cabin 5, and the second equivalent target plate 7 is used for representing the quasi-static pressure to be used as functional force. When the quasi-static pressure functional capability is evaluated through the second equivalent target plate 7, the shock wave isolation cabin 5 is fixed on the second test port on the left wall surface through bolts, the bottom of the pressure guide cabin 507 of the pressure guide cabin plate 501 is a blind end, and pressure guide holes 508 are uniformly formed in the side surface, so that the direct impact of explosion initial shock wave and detonation products on the second equivalent target plate 7 can be prevented. When the first equivalent target plate 6 and the second equivalent target plate 7 are installed, the high-temperature-resistant polytetrafluoroethylene cushion for shock insulation and sealing is arranged for sealing.

As shown in fig. 7, the shock wave isolation capsule 5 includes: a guide plate 501 and a cavity 502; the pressure guiding cabin plate 501 is fixedly connected with the closed test box 1 and the cavity cabin 502, the pressure guiding cabin 507 extending to the inside of the cavity cabin 502 is arranged in the middle of the pressure guiding cabin plate 501, and a plurality of pressure guiding holes 508 are formed in the side surface of the pressure guiding cabin 507; the cavity cabin 502 is fixedly installed on the outer side of the pressure guiding cabin plate 501, the cavity cabin 502 is of an annular structure, an outer flange is arranged at a port, and a second equivalent target plate 7 is installed on the outer flange. Specifically, a target plate mounting flange 503 is disposed outside the second equivalent target plate 7, and the second equivalent target plate 7 is clamped between the outer flange of the cavity chamber 502 and the target plate mounting flange 503 and fixedly connected by fastening screws.

As shown in fig. 2 and 7, the second equivalent target plate 7 is disposed parallel to the ballast guide plate 501; the bottom plate of the guide pressure cabin 507 is parallel to the side wall plate of the closed test box 1 and is used for filtering shock waves generated after the explosive column 9 to be tested is detonated; a quasi-static pressure cavity is formed among the pressure guide plate 501, the cavity cabin 502 and the second equivalent target plate 7; the pressure guide hole 508 can be communicated with the inner cavity of the closed test chamber 1 and the quasi-static pressure cavity, so that the quasi-static pressure can be conducted. The invention provides the pressure guide cabin plate 501 to prevent the direct impact of the initial blast wave and detonation products on the equivalent target plate, and simultaneously the side surface of the pressure guide cabin 507 is provided with holes to realize the side surface conduction of quasi-static pressure, reduce the influence of the initial blast wave on the second equivalent target plate 7, avoid the interference or damage of the blast wave and detonation products aiming at the static pressure sensor 11, and improve the accurate monitoring of the quasi-static pressure generated by the quasi-static pressure sensor 11 on the post-combustion process.

As shown in fig. 5, a right wall surface of the closed test chamber 1 is provided with a charge inlet and a charge outlet, a sealing door 101 is arranged at the charge inlet and the charge outlet, and the charge inlet and the charge outlet are sealed by the sealing door 101. During charging, the to-be-tested explosive column 9 is placed into the closed test box 1 from the charging inlet and outlet.

As shown in fig. 6, a plurality of first sensor mounting holes 102 are reserved in the other wall surface of the closed test chamber 1 for mounting the sensors. Specifically, the first sensor mounting hole 102 is a stepped hole; further, the sensor mount 16 is mounted in a first sensor mounting hole 102 reserved on the airtight test chamber 1.

As shown in fig. 10, the sensor mount 16 includes a carrier sleeve 161, a retaining nut 162, an insulating bushing 163, and an insulating pad 164. The support sleeve 161 is boss-shaped, the large end is clamped with the large hole of the stepped hole, and the small end is provided with external threads; the small end of the support sleeve 161 penetrates through the outer end of the first sensor mounting hole 102 and is screwed and fixed on the wall surface of the closed test box 1 through the fixing nut 162. Further, the holder sleeve 161 is provided with a screw shaft hole for mounting the sensor in the direction of its own axis; the sensor is fixedly connected with a threaded shaft hole of the sensor mounting seat 16 through threads, the neck of the sensor mounting seat 16 penetrates through the wall surface of the box body, and the end part of the sensor mounting seat 16 are flush with the inner wall surface of the box body; an insulating bush 163 is provided between the first sensor mounting hole 102 of the airtight test chamber 1 and the holder sleeve 161, an insulating pad 164 is provided between the airtight test chamber 1 and the fixing nut 162, and the insulating bush 163 and the insulating pad 164 are made of polytetrafluoroethylene.

Further, the size of the threaded shaft hole of the carrier sleeve 161 is designed according to the installation requirements of different types of sensors. As shown in fig. 1, a wall pressure sensor 12, a thermocouple temperature sensor 13 and an oxygen concentration sensor 14 are respectively arranged on the wall surface of the closed test chamber 1, a second sensor mounting hole 506 and a third sensor mounting hole 804 are arranged on the pressure guiding structure 8 and the shock wave isolation cabin 5, and a quasi-static pressure sensor 11 and a thermocouple temperature sensor 13 are arranged in the second sensor mounting hole 506 and the third sensor mounting hole 804.

As shown in fig. 6, the wall pressure sensor 12 is installed on the rear wall of the closed test chamber 1, and is located opposite to the center of the first equivalent target plate 6, and due to the symmetry of the load, the measured overpressure of the shock wave is consistent with the shock wave acting on the first equivalent target plate 6, so that the total internal explosion working capacity of the warm-pressing explosive can be accurately estimated in combination with the maximum deformation deflection of the equivalent target plate. The temperature and quasi-static pressure parameters measured by the thermocouple temperature sensor 13 and the quasi-static pressure sensor 11 are combined with the deformation deflection of the second equivalent target plate 7 obtained by the test of the laser displacement sensor 10, and the quasi-static pressure function output characteristic and the working capacity of the temperature-pressure explosive afterburning effect are accurately estimated.

Further, reinforcing rib plates 104 are additionally arranged at the edge positions of the closed test box 1, the closed test box 1 is reinforced, and the wrap angle of the welding seams among all the wall surfaces is reinforced through angle steel, so that the whole structure of the closed test box 1 is ensured not to be obviously deformed, and a stable test environment is provided. In the implementation, the equivalent target plates with different thicknesses are arranged according to the test dosage, so that the equivalent target plates are ensured not to break in the test process, and only plastic large deformation occurs.

Further, a hoisting bracket for suspending the to-be-detected explosive column 9 is arranged on the inner side of the top plate of the closed test box 1, and an installation platform is arranged at the tail end of the hoisting bracket for placing the to-be-detected explosive column 9; the grain 9 to be tested is hoisted at the center of the closed test box 1 through a hoisting bracket and is connected with the exploder 3 through a signal wire; further, the initiator 3 is connected with the multichannel dynamic acquisition instrument 2 through a trigger signal line, and a trigger signal output when the initiator 3 is started can trigger all sensors to synchronously acquire information.

In the implementation process, the to-be-detected explosive column 9 is detonated through the detonator 3; after the explosive column 9 to be tested is detonated, the metal-containing warm-pressure explosive can generate obvious post-combustion phenomenon after detonation impact, the detonation impact can directly do work on the first equivalent target plate 6, and then the quasi-static pressure generated in the post-combustion effect process can do work on the first equivalent target plate 6 and the second equivalent target plate 7 at the same time; therefore, the invention adopts two equivalent target plates to respectively test the total acting capacity of the warm-pressing explosive and the acting capacity of the combustion effect after the warm-pressing explosive, accurately and carefully analyzes the performance of the warm-pressing explosive, and further provides reliable data support for research, development and use of different types of warm-pressing explosives.

Further, in order to improve the accuracy of the test result, the invention uniformly distributes the quasi-static pressure transmitted to the quasi-static pressure cavity by the pressure guide holes 508; specifically, as shown in fig. 7, a load uniform distribution plate 504 is disposed between the pressure guiding plate 501 and the second equivalent target plate 7, and the load uniform distribution plate 504 is disposed parallel to the second equivalent target plate 7 and the pressure guiding plate 501 and is fixedly connected with the cavity 502; a plurality of pressure equalizing air holes are uniformly formed in the load uniform distribution plate 504; the pressure equalizing air holes are used for uniformly distributing and filtering the high-pressure air entering the quasi-static pressure cavity from the pressure guide holes 508.

Preferably, the quasi-static pressure sensor 11 is arranged between the load uniform distribution plate 504 and the second equivalent target plate 7, so that the pressure acting process of the quasi-static pressure generated by the afterburning effect on the second equivalent target plate 7 can be tested. Specifically, two second sensor mounting holes 506 are formed in the side wall of the side of the cavity cabin 502, which is close to the second equivalent target plate 7, and the quasi-static pressure sensor 11 and the thermocouple temperature sensor 13 are respectively mounted in the two second sensor mounting holes 506, so as to synchronously measure the quasi-static pressure time course curve and the temperature time course curve in the cavity cabin 502.

As shown in fig. 7, a load distribution plate 504 is disposed in the cavity 502, intermediate the guide plate 501 and the second equivalent target plate 7, and the three are parallel to each other. The pressure equalizing air holes on the load equalizing plate 504 can uniformly filter the high-pressure gas which enters the quasi-static pressure cavity from the pressure guiding holes 508 on the side plate of the pressure guiding cabin 507, so that the detonation gas flowing time is increased, and the uniform load which is applied to the equivalent target plate and is the quasi-static pressure is ensured.

Further, as shown in fig. 8, heat conducting pipes 505 are arranged in the load uniform distribution plate 504, and the heat conducting pipes 505 are arranged in an S-shaped curve and sequentially pass through gaps between two adjacent rows of pressure equalizing air holes; meanwhile, the heat conduction pipe 505 is externally connected with a water pump and a liquid cooling source, cooling liquid flows through the heat conduction pipe 505, and the rapid cooling of the gas in the cavity cabin 502 is realized through the circulation of the cooling liquid. In the invention, the flow rate of the cooling liquid in the heat pipe 505 is controlled by the water pump, so that the circulation speed of the cooling liquid is regulated and controlled, and the influence of different temperature states of the box body before detonation on the maximum deformation of the target plate can be studied.

As shown in fig. 4 and 5, at least one pressure guiding structure mounting hole 103 is provided on the wall surface of the closed test chamber 1; further, the pressure guiding structure 8 is installed in the pressure guiding structure installation hole 103; the invention is provided with a plurality of pressure guiding structures 8 at different closed positions. As shown in fig. 9, the pressure guiding structure 8 includes: impulse pipe 801, outer cylinder 802 and flange end cover 803; one end of the pressure guide pipe 801 is communicated with the internal space of the closed test box 1, the other end of the pressure guide pipe is closed, and the side surface of the pressure guide pipe 801 is provided with a hole; the outer cylinder 802 is covered outside the impulse pipe 801, one end of the outer cylinder 802 is connected with the outer side wall surface of the closed test chamber 1 in a sealing manner, and the other end is connected with the flange end cover 803 in a sealing manner.

As shown in fig. 9, the impulse pipe 801 vertically passes through the wall surface of the closed test box 1, one end of the impulse pipe 801 located inside the box body is a flange, and the flange of the impulse pipe 801 is installed, positioned and sealed with the closed test box 1 through a fastening bolt and a sealing gasket; the bottom of the pressure guide pipe 801 is a blind end, pressure guide holes are uniformly formed in the side face of the pressure guide pipe, flange plates are designed at two ends of the outer cylinder 802, one end of the pressure guide pipe is fixedly connected with the closed test box 1, and a flange end cover 803 is arranged at the other end in a sealing mode; flange end cap 803 is used to enclose pressure conducting structure 8 and pressure conducting tube 801 is capable of conducting quasi-static pressure and filtering the initial shock wave. The flange end cover 803 is provided with a third sensor mounting hole 804, and the quasi-static pressure sensor 11 is mounted on the third sensor mounting hole 804.

In implementation, the plurality of pressure guide structure mounting holes 103 reserved on the closed test box 1 can be tested according to experimental requirements without sealing treatment; namely, by installing and detaching the flange end cover 803 of the pressure guiding structure 8, the pressure guiding structure 8 is used as an auxiliary measuring component of quasi-static pressure or used as a pressure relief hole to simulate the influence on explosive implosion in the non-closed state of the closed cabin.

As shown in fig. 1, the closed test box 1 is fixedly provided with a wall pressure sensor 12 and a thermocouple temperature sensor 13; two groups of laser displacement sensors 10 are arranged on the outer side of the closed test box 1 and are used for monitoring the deformation of the first equivalent target plate 6 and the second equivalent target plate 7 respectively; the side of the hollow compartment 502 of the shock wave isolation compartment 5 is mounted with a quasi-static pressure sensor 11 and a thermocouple temperature sensor 13.

Further, the test system for performing functional assessment on warm-pressing explosive of the invention further comprises: a multichannel dynamic acquisition instrument 2 and a computer 4; the laser displacement sensor 10, the quasi-static pressure sensor 11, the wall pressure sensor 12, the thermocouple temperature sensor 13 and the oxygen concentration sensor 14 are all connected with the multichannel dynamic acquisition instrument 2; the multichannel dynamic acquisition instrument 2 is connected with the computer 4, and then information acquired by a plurality of sensors can be transmitted to the computer 4 for processing.

As shown in fig. 1,4 and 5, an oxygen concentration sensor 14 and a high-pressure air-guide hole 15 are also provided on the wall surface of the sealed test chamber 1.

Specifically, two high-pressure air guide holes 15 are formed in a group, and at least one group is arranged; the high-pressure air duct 15 is provided with a high-pressure air duct, and the high-pressure air duct is used for being connected with a high-pressure air cylinder so as to replace gas components in the closed test box 1 or adjust the proportion of gas. As shown in fig. 4 and 5, the high-pressure air-guiding holes 15 are respectively arranged on the left wall surface and the right wall surface of the closed test chamber 1 and are distributed in a high-low mode. The two high-pressure air guide holes 15 are arranged one by one, so that the gas components and the proportion in the box body can be replaced, and different implosion gas environments can be simulated. Specifically, the high-pressure air guide hole 15 is respectively externally connected with a gas pressure bottle and a pressure pump through a high-pressure air guide pipe, and the gas pressure bottle and the pressure pump are used for filling specific gas into the box body and adjusting the gas components in the closed test box 1.

Specifically, the oxygen concentration sensor 14 is used to monitor the oxygen concentration of the gas inside the closed test chamber 1. Specifically, the oxygen concentration sensor 14 is used for acquiring the oxygen concentration in the closed test chamber 1, and can be used for measuring the oxygen content in the initial gas environment and measuring the oxygen consumption in the reaction process, and a time change curve of the oxygen concentration after initiation is obtained through the oxygen concentration sensor 14.

Specifically, air, oxygen or inert gas is stored in the high-pressure gas cylinder, and the high-pressure gas cylinder is communicated with the high-pressure gas guide hole 15 through the high-pressure gas guide pipe, so that gas components in the airtight test box 1 can be replaced, and the oxygen content in the airtight test box 1 can be adjusted.

In one embodiment of the invention, the central maximum deformation deflection values of the first equivalent target plate 6 and the second equivalent target plate 7 are measured by a laser displacement sensor 10, and the laser displacement sensor 10 is mounted on the ground by a separate sensor bracket 17. Preferably, the sensor bracket 17 comprises a sliding structure with adjustable left-right spacing and a sliding structure with adjustable longitudinal height, and the two structural members of the sliding structure are in relative sliding and fastening connection through a U-shaped hole and a fastening bolt.

Preferably, the main body of the closed test box 1 is made of 16MnR high pressure vessel steel with the thickness of 30 mm; in order to increase the sensitivity of the equivalent target plate to the response of the explosion load, a material with lower yield strength and good ductility is generally adopted, and therefore, the first equivalent target plate 6 and the second equivalent target plate 7 are both made of Q235 steel with better ductility.

Further, the airtight test box 1 and the first equivalent target plate 6, the airtight test box 1 and the shock wave isolation cabin 5 and the second equivalent target plate 7 are connected by high-strength bolts; and the high temperature resistant polytetrafluoroethylene pad for shock insulation and sealing is arranged at the joint of the bolts.

Specifically, according to the metal particle content of the warm-pressing explosive, the thicknesses of the first equivalent target plate 6 and the second equivalent target plate 7 are adjusted so as to ensure that no crack occurs in the target plate in the test process, and plastic large deformation can be generated.

Example 2

In a specific embodiment of the invention, an improved design is carried out on the basis of the embodiment 1, and a specific structure of the shock wave isolation cabin 5 is arranged to replace the pressure guiding cabin plate 501 in the embodiment 1;

In this embodiment, as shown in fig. 11, a multilayer filter plate is provided on the outer side of the guide plate 501; wherein, the pressure guiding cabin plate 501 is provided with a plurality of threaded holes for fixedly connecting with the wall plate of the closed test box 1; the middle part of the guide cabin plate 501 is provided with a round or rectangular middle opening 509, the outer side of the middle opening 509 is fixedly connected with a first layer of filter plate through a first support column 513, and the first layer of filter plate is fixedly connected with a second layer of filter plate through a second support column 514; the projections of the first filter plate and the second filter plate on the guide cabin plate 501 can cover the middle opening 509; the first filter plate and the second filter plate can filter shock waves generated when the explosive column 9 to be tested explodes; the quasi-static pressure value rises during the explosive post-combustion effect, and the quasi-static pressure in the sealed test chamber 1 can be transmitted to the quasi-static pressure sensor 11 on the second equivalent target plate 7 and the cavity cabin 502 through the gaps between the multi-layer filter plates, so that the functional capacity of the static pressure can be aligned for testing.

As shown in fig. 11, the first filter plate is parallel to the guide ballast plate 501, and the first support posts 513 are disposed perpendicular to the guide ballast plate 501; the second layer of filter plates is parallel to the first layer of filter plates and the second struts 514 are disposed perpendicular to the first layer of filter plates.

As shown in fig. 11, the first layer filter plate includes: a first filter plate 510 and a second filter plate 511; the first filter plate 510 and the second filter plate 511 are positioned on the same plane and are arranged at intervals; the first filter plate 510 and the second filter plate 511 are fixedly connected to the guide chamber plate 501 through the first support posts 513. Specifically, the gap value between the first filter plate 510 and the second filter plate 511 is set to d.

As shown in fig. 11, a second filter plate, i.e., a third filter plate 512, is provided; the ratio of the width L of the third filter plate 512 to the gap d between the first filter plate 510 and the second filter plate 511 is greater than 1.5:1, a step of; meanwhile, the relationship between the width S of the first filter plate 510 and the second filter plate 511 and the width S of the middle opening 509 is: s <2s+d; i.e., the edges of the first filter plate 510 and the second filter plate 511 extend beyond the edges of the middle opening 509, and thus the shock waves generated by the explosion can be isolated by the multi-layer filter plates.

In this embodiment, since the first support posts 513 and the second support posts 514 provide a certain gap between the multilayer filter plate and the pressure guiding plate 501, the quasi-static pressure during the post-explosion combustion effect can not be isolated on the premise of isolating the shock wave, and accurate monitoring of the aligned static pressure can be realized.

Example 3

A method for evaluating the functioning of a warm-blooded explosive, the test of functioning of a warm-blooded explosive being carried out using the closed test chamber 1 of example 1, comprising the steps of:

Step S1: manufacturing a to-be-tested explosive column 9 according to the type of the to-be-evaluated explosive, and adopting an inert LiF-substituted metal-added explosive column as a control explosive;

Step S2: installing an equivalent target plate on the closed test box 1, sealing the closed test box 1, respectively loading the control charge and the to-be-tested explosive column 9 into the closed test box 1 for detonation, and calibrating the thicknesses of the first equivalent target plate 6 and the second equivalent target plate 7;

step S3: manufacturing a plurality of groups of equivalent target plates by taking the thickness of the standard target plate as a reference; a first equivalent target plate 6 is fixedly arranged on the side wall of the closed test box 1, and a second equivalent target plate 7 is arranged on the shock wave isolation cabin 5; loading the grain 9 to be tested into the closed test box 1 for detonation;

According to deflection deformation curves of the first equivalent target plate 6 and the second equivalent target plate 7 measured by the laser displacement sensor and combined with the temperature, the wall pressure and the quasi-static pressure of the closed test box 1 measured by the thermocouple temperature sensor 13, the wall pressure sensor 12 and the quasi-static pressure sensor 11, analyzing and calculating the total acting capacity of the detonation process of the to-be-measured explosive column 9 and the acting capacity of the quasi-static pressure under the post-combustion effect;

Step S4: repeating the steps S1 to S3 for a plurality of times, carrying out repeated tests, carrying out functional force evaluation on the charges with different formulas, and obtaining the explosive formulas meeting different requirements.

In the step S1, the quasi-static pressure sensor 11 is installed in the second sensor installation hole 506 and the third sensor installation hole 804 reserved on the shock wave isolation cabin 5 and the pressure guiding structure 8. A thermocouple temperature sensor 13 is mounted on the wall surface of the closed test chamber 1, and a thermocouple temperature sensor 13 is mounted in a second sensor mounting hole 506 reserved in the shock wave isolation capsule 5. The wall pressure sensor 12 is installed in a first sensor installation hole 102 reserved on the wall surface of the closed test box 1, the wall pressure sensor 12 is opposite to the center of the loaded area of the first equivalent target plate 6, and the measured shock wave overpressure corresponds to the shock wave overpressure applied to the center of the loaded area of the target plate due to the symmetry of the explosion load. In addition, the oxygen concentration sensor 14 is mounted in the other first sensor mounting hole 102, and all the sensors are connected to the multichannel dynamic acquisition instrument 2, and the external trigger test is performed by the initiator 3 to confirm that all the sensors acquire data normally.

In the step S1, explosive columns with different metal particle contents are prepared according to the type, formula and quality of the explosive column 9 to be detected; at least two grains are prepared for each formulation. The grain is prepared by adopting a press-fit process, and the charge density is unified to be 96% of the maximum theoretical density; the TNT equivalent of the to-be-detected explosive column is required to be smaller than 60% of the maximum allowable TNT equivalent of the closed test box 1, so that the structure is ensured not to be obviously deformed, and a stable and uniform test environment is provided for repeated tests.

In the step S1, lithium fluoride is used to replace metal to charge as a control group of the grain 9 to be tested, the lithium fluoride keeps chemical inertness during detonation of the explosive, the expansion process of the detonation product keeps isentropic, and the post-combustion effect can be avoided. Therefore, the working capacity of the aluminum-containing warm-pressing explosive and the gain of the working capacity of the metal powder after-effect can be evaluated by a method of carrying out functional comparison on the charges with different metal contents.

In the step S1, a closed test box 1 is used as a main body, and a warm-pressure explosive is established as a functional capacity evaluation test system by matching with typical test equipment such as a multi-channel dynamic acquisition instrument 2, an exploder 3, a computer 4 and the like.

Specifically, in the step S2 and the step S3, the grain 9 to be tested is suspended in the closed test box 1, the height of the grain 9 to be tested is located at the center of the closed test box 1, and the detonator wire of the detonator 3 is led out through a medicine hanging port arranged on the box body of the closed test box and clamped and sealed through two layers of rubber sealing gaskets.

In the step S2, in the calibration process, on the premise that no break appears in the equivalent target plate, the target plate thickness corresponding to the maximum deformation difference value of the equivalent target plate under the implosion action of the control charge and the grain 9 to be tested is used as the standard target plate for evaluating the function of the current explosive formula. Because LiF does not react with detonation products, no post-combustion effect is generated, and the inert LiF is added to completely replace the metal charge grain and the charge grain of the grain 9 to be tested for the calibration experiment of the target plate thickness; under the implosion action of the two explosive grains, the maximum deformation difference of the first equivalent target plate 6 or the second equivalent target plate 7 is larger than 30mm. After the test is finished, the deflection time-course curves of the central points of the first equivalent target plate 6 and the second equivalent target plate 7 are read, and when the maximum deflection of the central point of the target plate meets the requirement, the corresponding target plate thickness can be used as the standard target plate of the first equivalent target plate 6 and the second equivalent target plate 7. If the conditions are not met, the first equivalent target plate 6 and the second equivalent target plate 7 with different thicknesses are replaced for calibration again; after calibration, the thicknesses of the first equivalent target plate 6 and the second equivalent target plate 7 in the formal test process are unchanged.

In the step S2 and the step S3, after the first equivalent target plate 6 and the second equivalent target plate 7 are installed, central points are marked on the first equivalent target plate 6 and the second equivalent target plate 7, and the two laser displacement sensors 10 are installed in place through the brackets, so that the lasers emitted by the two groups of laser displacement sensors 10 are horizontal to the ground and vertically hit the central points of the first equivalent target plate 6 and the second equivalent target plate 7, and further, the deformation condition of the central points of the first equivalent target plate 6 and the second equivalent target plate 7 can be monitored.

In step S2, high-pressure air is introduced through the high-pressure air-guide hole 15, and the airtight test chamber 1 is subjected to an airtight test. After the detection is finished, the air valve on the high-pressure air guide hole 15 is opened, and after the internal and external air pressures are balanced, the air valve is closed.

In the step S3, after the grain 9 to be tested is detonated, the deflection deformation curves of the first equivalent target plate 6 and the second equivalent target plate 7 are monitored by two groups of laser displacement sensors 10; testing a quasi-static pressure value of the second equivalent target plate 7 when a post-combustion effect occurs after the explosive column 9 to be tested is detonated through a quasi-static pressure sensor 11; the wall pressure and the wall temperature of the closed test chamber 1 are respectively tested by a plurality of wall pressure sensors 12 and a plurality of thermocouple temperature sensors 13; after the test is completed, the measurements of all sensors are read and stored.

In the step S3, after the pressure of the closed test chamber 1 is released, the sealing door 101 is opened, the gas residue in the chamber is blown out by a fan, and the solid residue of the internal detonation product is cleaned and collected so as to analyze the detonation product components; and detects whether all the sensors are normal in function, and the first equivalent target plate 6 and the second equivalent target plate 7 are replaced to start the next experiment.

In the step S4, gases with different components are injected into the closed test chamber 1 through the high-pressure air-guiding hole 15, the gas proportion is adjusted, meanwhile, the oxygen concentration sensor 14 is used for measuring the internal oxygen concentration, when the oxygen concentration is reduced to be lower than the oxygen concentration in the air, the grain 9 to be tested is detonated, the obtained maximum deflection of the center of the equivalent target plate in the low-oxygen state is compared with the maximum deflection of the center of the equivalent target plate measured in the air environment, and the difference value of the maximum deflection and the maximum deflection is used for representing the inhibiting effect of different oxygen environments on the afterburning effect of the temperature-pressure explosive and the influence on the total function of the grain 9 to be tested.

In the step S4, when the explosive gas environment needs to be adjusted, the pressure pump and the high-pressure gas cylinder are connected through the high-pressure gas guide hole 15, the gas in the high-pressure gas cylinder is led into the closed test box 1, and is detected by the barometer and the oxygen concentration sensor until the required gas pressure and oxygen concentration are reached.

In step S4, by opening flange end caps of the pressure guiding structure mounting holes 103 with different numbers or different positions, detonation environments with different communication degrees are formed, and then the to-be-tested grains 9 with different formulas are detonated for testing; and obtaining the maximum deflection of the centers of the equivalent target plate and the equivalent target plate, comparing the maximum deflection of the centers of the equivalent target plate measured in a closed state of the closed test box 1, and representing the influence of different pressure relief conditions on the functional force of the warm-pressing explosive by adopting the difference value of the maximum deflection of the centers of the equivalent target plate and the equivalent target plate.

In the step S4, the metal content of the grain 9 to be measured is adjusted, repeated tests of charges with different metal contents are carried out, and the functional capacity of the warm-pressing explosive is evaluated for the different metal contents, so that the explosive formula meeting different requirements is obtained.

Preferably, the test site is selected on a flat ground with wide space, and the closed test box 1 is horizontally placed on a concrete foundation with good surface levelness and flatness.

Compared with the prior art, the technical scheme provided by the embodiment has at least one of the following beneficial effects:

1. According to the invention, by collecting the dynamic responses of the first equivalent target plate 6 and the second equivalent target plate 7 under the explosion impact and the quasi-static pressure impact loading, the total explosion acting capacity of the warm-pressing explosive in the closed space and the quasi-static pressure acting function capacity of the metal powder under the post-combustion effect can be quantitatively and intuitively evaluated, the total acting capacity of the warm-pressing explosive and the gain effect of the post-combustion effect on the static pressure and the acting capacity thereof can be quantitatively and accurately evaluated, and the quantitative representation of the energy output characteristic and the acting capacity of the charging can be realized.

2. The invention adopts the shock wave isolation cabin 5 to filter shock waves, avoids the direct action of the shock waves on the second equivalent target plate 7 and the quasi-static pressure sensor 11, and simultaneously arranges the heat conduction pipes 505 in the load uniform distribution plate 504, and realizes the regulation and control of the gas temperature in the cavity through the circulation of cooling liquid. Through the arrangement of the quasi-static pressure sensor 11, the thermocouple temperature sensor 13 and the second equivalent target plate 7, the accurate and effective evaluation of the post-combustion quasi-static pressure of the temperature-pressure explosive and the functional capacity of the post-combustion quasi-static pressure is realized, and the influence of analysis thermal effect on the deformation of the target plate is realized through the temperature regulation and control of cooling liquid in the shock wave isolation cabin.

3. The invention adopts the multichannel dynamic acquisition instrument 2, and realizes synchronous acquisition of all sensors by triggering the exploder 3. The first equivalent target plate 6 and the second equivalent target plate 7 are combined with physical parameters such as temperature, pressure and the like measured by correspondingly arranged sensors, the total working capacity and the quasi-static pressure working capacity are quantitatively evaluated, and the accurate quantitative evaluation of the comprehensive working capacity of the temperature and pressure explosive implosion, particularly the gain of the post-combustion effect, is realized.

4. According to the method for evaluating the functional force of the warm-pressing explosive, the pressure pump and the pressure gas cylinder are utilized to regulate the gas components, the proportion and the gas pressure in the closed test box 1, so that the influence of the explosion environment and the initial pressure on the functional force of the explosive can be analyzed; and opening the mounting holes 103 of the pressure guide structures at different positions and in different numbers, so as to realize flexible simulation of the implosion environment under different sealing degrees.

5. According to the invention, through reinforcing the vulnerable area of the closed test box 1, the box body test is not deformed, and the economy of multiple tests and the consistency of test environments are realized.

The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.

Claims (8)

1. A test system for evaluating the functioning of a warm-pressed explosive comprising: the device comprises a closed test box (1), a shock wave isolation cabin (5), a first equivalent target plate (6), a second equivalent target plate (7), a laser displacement sensor (10), a quasi-static pressure sensor (11), a wall pressure sensor (12) and a thermocouple temperature sensor (13);

The closed test box (1) is used for simulating the explosion environment of the grain (9) to be tested; a first test port is formed in one side face of the closed test box (1), and the first equivalent target plate (6) is arranged at the first test port; a second test port is formed in the other side face of the closed test box (1), the shock wave isolation cabin (5) is fixedly installed at the second test port, and the second equivalent target plate (7) is installed on an outer flange of the shock wave isolation cabin (5);

The shock wave isolation capsule (5) comprises: a guide plate (501) and a cavity (502); the pressure guiding cabin plate (501) and the cavity cabin (502) are fixedly connected with the closed test box (1); the second equivalent target plate (7) is arranged parallel to the guide cabin plate (501); a quasi-static pressure cavity is formed among the pressure guide plate (501), the cavity cabin (502) and the second equivalent target plate (7);

The middle part of the pressure guiding cabin plate (501) is provided with a pressure guiding cabin (507) extending to the inside of the cavity cabin (502), and the side surface of the pressure guiding cabin (507) is provided with a plurality of pressure guiding holes (508); the bottom plate of the guide cabin (507) is parallel to the side wall plate of the closed test box (1), and the guide cabin (507) can filter shock waves generated after the explosive column (9) to be tested is detonated; the pressure guide hole (508) can be communicated with the inner cavity of the closed test box (1) and the quasi-static pressure cavity, so that the quasi-static pressure can be conducted; or alternatively

A multilayer filter board is arranged on the outer side of the pressure guiding cabin board (501); the middle part of the guide cabin plate (501) is provided with a round or rectangular middle opening (509), the outer side of the middle opening (509) is fixedly connected with a first layer of filter plate through a first support column (513), and the first layer of filter plate is fixedly connected with a second layer of filter plate through a second support column (514); the projections of the first filter plate and the second filter plate on the guide cabin plate (501) can cover the middle opening (509); the first filter plate and the second filter plate can be used for filtering shock waves generated when the explosive column (9) to be tested explodes; the quasi-static pressure value rises during the explosive post-combustion effect, and the quasi-static pressure in the sealed test box (1) can be transmitted to the quasi-static pressure sensor (11) on the second equivalent target plate (7) and the cavity cabin (502) through the gaps between the multi-layer filter plates;

The cavity cabin (502) is fixedly arranged on the outer side of the pressure guiding cabin plate (501), the cavity cabin (502) is of an annular structure, and a second equivalent target plate (7) is arranged at a port;

A load uniform distribution plate (504) is arranged between the pressure guide cabin plate (501) and the second equivalent target plate (7), and the load uniform distribution plate (504) is parallel to the second equivalent target plate (7) and the pressure guide cabin plate (501) and is fixedly connected with the cavity cabin (502); a plurality of pressure equalizing air holes are uniformly formed in the load uniform distribution plate (504); the pressure equalizing air holes are used for uniformly distributing and filtering high-pressure air entering the quasi-static pressure cavity from the pressure guide holes (508);

The laser displacement sensor (10) is provided with two groups for respectively monitoring the deformation of the first equivalent target plate (6) and the second equivalent target plate (7); a wall pressure sensor (12) is fixedly arranged on the closed test box (1); a quasi-static pressure sensor (11) is arranged on the side surface of the cavity cabin (502); thermocouple temperature sensors (13) are arranged on the wall surface of the closed test box (1) and on the side surface of the cavity cabin (502).

2. The test system for evaluating the functioning of a warm-blooded explosive as claimed in claim 1, characterized in that a plurality of pressure guiding structures (8) are mounted in different positions on the wall of the closed test chamber (1), said pressure guiding structures (8) comprising: a pressure guide pipe (801), an outer cylinder (802) and a flange end cover (803); one end of the impulse pipe (801) is communicated with the internal space of the closed test box (1), the other end of the impulse pipe is closed, and the side surface of the impulse pipe (801) is provided with an opening; the outer cylinder (802) is covered outside the impulse pipe (801), one end of the outer cylinder (802) is connected with the outer side wall surface of the closed test box (1) in a sealing mode, and the other end of the outer cylinder is connected with the flange end cover (803).

3. The test system for evaluating the functioning of a warm-blooded explosive as claimed in claim 1, characterized in that the wall of the closed test chamber (1) is also provided with an oxygen concentration sensor (14) and a high-pressure air vent (15); two high-pressure air guide holes (15) are formed in one group, and at least one group is arranged; a high-pressure air duct is arranged in the high-pressure air duct (15) and is used for being connected with a high-pressure air cylinder so as to replace gas components in the closed test box (1) or adjust the proportion of the gas; the oxygen concentration sensor (14) is used for monitoring the oxygen concentration inside the closed test box (1).

4. The test system for evaluating the functioning of a warm-pressed explosive according to claim 1, further comprising: a multichannel dynamic acquisition instrument (2) and a computer (4); the laser displacement sensor (10), the quasi-static pressure sensor (11), the wall pressure sensor (12), the thermocouple temperature sensor (13) and the oxygen concentration sensor (14) are connected with the multichannel dynamic acquisition instrument (2); the multichannel dynamic acquisition instrument (2) is connected with the computer (4), and then information acquired by a plurality of sensors can be transmitted to the computer (4) for processing.

5. A method for evaluating the functioning of a warm-pressed explosive, characterized in that a test system for evaluating the functioning of a warm-pressed explosive according to any one of claims 1-4 is used, comprising the steps of:

step S1: manufacturing a to-be-tested explosive column (9) according to the type of the to-be-evaluated explosive, and adopting an inert LiF-substituted metal-added explosive column as a control explosive;

Step S2: a first equivalent target plate (6) and a second equivalent target plate (7) are arranged on a closed test box (1) and the closed test box (1) is closed, and a control charge and a to-be-tested explosive column (9) are respectively filled into the closed test box (1) for detonation, and meanwhile the thicknesses of the first equivalent target plate (6) and the second equivalent target plate (7) are calibrated to obtain standard target plates of the first equivalent target plate and the second equivalent target plate;

step S3: manufacturing a plurality of groups of equivalent target plates by taking the thickness of the standard target plate as a reference; a first equivalent target plate (6) is fixedly arranged on the side wall of the closed test box (1), and a second equivalent target plate (7) is arranged on the shock wave isolation cabin (5); loading a grain (9) to be tested into a closed test box (1) for detonation; according to deflection deformation curves of a first equivalent target plate (6) and a second equivalent target plate (7) which are measured by a laser displacement sensor (10) and combined with the temperature, the wall pressure and the quasi-static pressure of a closed test box (1) which are measured by a thermocouple temperature sensor (13), a wall pressure sensor (12) and a quasi-static pressure sensor (11), analyzing and calculating the total acting capacity of the detonation process of the to-be-measured explosive column (9) and the acting capacity of the quasi-static pressure under the afterburning effect;

Step S4: repeating the steps S1 to S3 for repeated tests, and carrying out functional assessment on the charges with different formulas.

6. The method for evaluating the capacity of a warm-pressed explosive according to claim 5, wherein in the step S2, on the premise that no break occurs in the equivalent target plate in the calibration process, the target plate thickness corresponding to the maximum deformation difference of the equivalent target plate under the action of implosion of the control charge and the grain (9) to be tested is used as the standard target plate for the capacity evaluation of the current explosive formulation.

7. The method for evaluating the performance of a warm-pressure explosive according to claim 6, wherein in the step S4, gases with different components are injected into the closed test chamber (1) through the high-pressure air-guiding hole (15) arranged on the wall surface of the closed test chamber (1) and the gas proportion is adjusted, meanwhile, the oxygen concentration sensor (14) is used for measuring the internal oxygen concentration, when the oxygen concentration in the closed test chamber (1) is lower than the oxygen concentration in the air, the to-be-tested grain (9) is detonated, the obtained maximum deflection of the center of the equivalent target plate in the low-oxygen state is compared with the maximum deflection of the center of the equivalent target plate measured in the air environment, and the difference value between the maximum deflection and the maximum deflection is used for representing the inhibiting effect of different oxygen environments on the post-combustion effect of the warm-pressure explosive and the influence on the total performance of the to-be-tested grain (9).

8. The method for evaluating the functioning of warm-pressed explosives according to claim 7, characterized in that in step S4, explosion environments with different degrees of communication are formed by opening flange end caps (803) of different numbers or different positions of pressure guiding structures (8), and then testing is performed by detonating grains (9) to be tested with different formulations; and obtaining the maximum deflection of the centers of the equivalent target plate and the equivalent target plate, comparing the maximum deflection of the centers of the equivalent target plate measured in a closed state of the closed test box (1), and representing the influence of different pressure relief conditions on the functional force of the warm-pressing explosive by adopting the difference value of the maximum deflection of the centers of the equivalent target plate and the equivalent target plate.