CN115823973A - Multi-probe positioning and collecting device for testing detonation growth and testing method - Google Patents
Multi-probe positioning and collecting device for testing detonation growth and testing method Download PDFInfo
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Abstract
The invention relates to a multi-probe positioning acquisition device and a multi-probe positioning acquisition method for testing detonation growth, belongs to the technical field of ammunition engineering, and aims to solve the problems that the existing detonation testing mode cannot realize direct testing and is low in testing accuracy. The invention includes: the device comprises a base, a medicine column limiting base, a probe positioning unit and a test probe; the explosive column limiting base is arranged in the center of the base, and the explosive column to be detected is arranged on the explosive column limiting base; the probe positioning unit is arranged on the base; a plurality of groups of probe positioning units are arranged in the circumferential direction of the to-be-detected explosive column; the probe positioning unit is fixedly provided with the test probe, and the test probe is tightly propped against the outer surface of the to-be-tested explosive column through the probe positioning unit. The detonation time monitoring device realizes monitoring of the detonation time of a plurality of monitoring points on the surface of the explosive column, and further realizes capturing of the detonation wave in the explosive column to be detected, which propagates along the axis and emits on the side surface of the explosive column.
Description
Technical Field
The invention relates to the technical field of ammunition engineering, in particular to a multi-probe positioning and collecting device and a testing method for testing detonation growth.
Background
The detonation and propagation sequence is an important component in a blasting system, is a functional component which is detonated by a detonator and realizes stable detonation of main explosive through a propagation explosive column, and is an effective way for realizing reliable detonation of insensitive main explosive under a smaller propagation explosive column by reducing the size of the propagation explosive particularly for realizing miniaturization and improving safety.
However, the detonation propagation process has certain complexity, is related to the characteristics of the explosive and the size and structure matching of the explosive, relates to complex processes such as impact initiation, detonation propagation, diffraction, detonation and local non-detonation of the explosive, and is of great importance in reliability evaluation and safety evaluation of the detonation process. In the research of the detonation and detonation propagation sequence, under the impact detonation action of the small-size detonation propagation charge column, the detonation growth process in the main charge column shows a two-dimensional effect, and the reliability of detonation transmission is determined by the obvious difference of the reaction rates along the axial direction and the radial direction. The detonation growth characteristics of the main charge under the action of the booster charges with different diameters are accurately mastered and effectively evaluated, and the method has important significance for scientifically guiding the design of the detonation booster sequence, evaluating the reliability and the like.
At present, the simplest method for researching the detonation effect is to judge the pit state of the steel evidence plate after detonation, and the method comprises the influences of a charging structure, constraint, output energy of detonation transfer agents and the like on the detonation reliability, but the method is lack of understanding of corners and detonation dead zones in the detonation process. The other optical measurement method is a method for observing the detonation wave propagation process and recording the detonation wave propagation track by observing the side surface of the exposed main charge through a high-speed scanning camera. Due to the influence of the test environment and the lateral sparse waves of the air, the observed detonation wave emergence condition on the surface of the main charge is not accurate enough. The method has relatively high requirements on instruments and test environment and inaccurate response to the development process of detonation.
Therefore, a new explosion propagation effect testing device is needed to be provided, the influence of the size structure of the explosion propagation explosive column on the detonation propagation of the main charge is researched, and a basis is provided for size matching of an explosion propagation sequence.
Disclosure of Invention
In view of the above analysis, the present invention provides a multi-probe positioning and collecting device and a testing method for testing detonation growth, so as to solve the problems that the conventional detonation effect testing method cannot realize direct testing and has low testing accuracy.
The purpose of the invention is mainly realized by the following technical scheme:
a multi-probe positioning and collecting device for testing detonation growth, comprising: the device comprises a base, a grain limiting base, a probe positioning unit and a test probe;
the explosive column limiting base is arranged in the center of the base, and the explosive column to be detected is arranged on the explosive column limiting base; the probe positioning unit is arranged on the base;
a plurality of groups of probe positioning units are arranged in the circumferential direction of the to-be-detected explosive column;
the probe positioning unit is fixedly provided with the test probe, and the test probe is tightly propped against the outer surface of the to-be-tested explosive column through the probe positioning unit.
Further, the probe positioning unit includes: a vertical rotating rod and a positioning cross rod assembly; the vertical rotating rod is perpendicular to the base; the positioning cross rod assembly is vertically installed on the vertical rotating rod.
Furthermore, one end of the test probe is fixed at the end part of the positioning cross rod assembly and is in abutting contact with the explosive column to be tested; the other end of the test probe is connected with a coaxial cable signal wire.
Furthermore, one end of the coaxial cable signal line is connected with the test probe, and the other end of the coaxial cable signal line is connected with the RC pulse network generator.
Further, the RC pulse network generator is connected with the dynamic signal acquisition system through a synchronous signal line.
Furthermore, the contact positions of the surface of the to-be-detected grain and the plurality of test probes are used as monitoring point positions; the test probe is used for monitoring the detonation wave emergence moment of the corresponding monitoring point position.
Furthermore, the probe positioning unit is provided with a plurality of groups which are uniformly distributed in the circumferential direction of the explosive column to be detected.
Further, a probe positioning unit comprises a plurality of groups of the positioning cross rod assemblies.
Furthermore, a plurality of groups of positioning cross rod assemblies are arranged on the vertical rotating rod in parallel.
A multi-probe positioning test method for testing detonation growth is characterized in that the test method adopts the multi-probe positioning acquisition device for testing detonation growth; the test method comprises the following steps:
step 1: installing a grain to be tested on the multi-probe positioning and collecting device for testing detonation growth;
step 2: detonating the explosive column to be tested;
and step 3: and monitoring a plurality of monitoring point positions on the surface of the to-be-detected grain through a plurality of test probes.
The technical scheme of the invention can at least realize one of the following effects:
1. the invention adopts a multi-probe positioning acquisition device to fix the test probe, directly measures the time when the detonation waves reach different positions on the surface of the explosive column to be tested through the test probe, and captures the propagation track of the detonation waves in the explosive column to be tested along the side axis.
2. According to the multi-probe positioning acquisition device and the test method for testing the detonation growth, the ionization and conduction characteristics of the detonation waves of the explosive are utilized, when the detonation waves reach the monitoring point position of the test probe, the test probe can conduct electricity instantly, and pulse electric signals are transmitted to a dynamic signal acquisition system through an RC pulse network generator and cables (coaxial cable signal lines and synchronous signal lines). The invention measures the time when the detonation waves reach different positions on the surface of the main explosive loading column by the multi-probe positioning and collecting device, and realizes accurate and rapid accurate measurement of the detonation growth process of the main explosive.
3. According to the multi-probe positioning and collecting device for testing detonation growth, disclosed by the invention, through monitoring of the test probe on a plurality of point positions on the surface of the explosive column to be tested, the detonation wave emergent track can be accurately obtained, the influence of the size structure of the booster explosive column on the detonation propagation of the main charge is researched, and a basis is provided for size matching of a booster sequence.
In the invention, the technical schemes can be combined with each other 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 will 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, wherein like reference numerals are used to designate like parts throughout.
Fig. 1 is a multi-probe positioning and collecting device for testing detonation growth in embodiment 1 of the present invention;
FIG. 2 is a structural view of a cartridge-limiting base in example 1 of the present invention;
FIG. 3 is a structural view of a probe positioning unit in embodiment 1 of the present invention;
FIG. 4 is a top view of a retention bar assembly of example 1 of the present invention;
FIG. 5 is a side view of a retention bar assembly of example 1 of the present invention;
FIG. 6 is a schematic view of the structure of the beam insulating end in embodiment 1 of the present invention;
FIG. 7 is a schematic view showing the state of fixing the insulating end of the beam to the probe in embodiment 1 of the present invention;
FIG. 8 is a schematic view showing the positions of the measuring points of the surface probes on the side of the traditional Chinese medicine column in embodiment 1 of the present invention.
Reference numerals are as follows:
1-a base; 2-a grain limiting base; 3-a probe positioning unit; 4-pressure relief round holes; 5-arc chute; 6-base feet; 7-vertical rotating rod; 8-a test probe; 9-coaxial cable signal line; a 10-RC pulse network generator; 11-a synchronization signal line; 12-a dynamic signal acquisition system; 13-a to-be-detected drug column; 14-preparing a crack; 15-positioning the cross bar assembly; 16-a connector; 17-positioning the cross bar; 18-beam insulation end; 19-a first stop; 20-a spring; 21-an insulating bush; 22-a first fastening screw; 23-probe positioning groove; 24-probe trace through holes; 25-an insulated end plug part; 26-a second stop; 27-second fastening screw.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the invention serve to explain the principles of the invention and not to limit its scope.
Example 1
In an embodiment of the present invention, a multi-probe positioning and collecting device for testing detonation growth is provided, as shown in fig. 1 to 8, including: the device comprises a base 1, a grain limiting base 2, a probe positioning unit 3 and a test probe 8; the explosive column limiting base 2 is arranged in the center of the base 1, and the explosive column 13 to be tested is arranged on the explosive column limiting base 2; the probe positioning unit 3 is arranged on the base 1; a plurality of groups of probe positioning units 3 are arranged in the circumferential direction of the to-be-detected explosive column 13; the probe positioning unit 3 is fixedly provided with the test probe 8, and the test probe 8 is tightly propped against the outer surface of the explosive column 13 to be tested through the probe positioning unit 3.
Specifically, as shown in fig. 1, a pressure relief circular hole 4 is reserved in the center of the base 1; the spacing base 2 of powder column is fixedly installed in the pressure release round hole 4 of the base 1.
As shown in fig. 1, the base 1 is further provided with four circular-arc-shaped sliding grooves 5 for mounting the probe positioning unit 3, and the four circular-arc-shaped sliding grooves 5 are uniformly distributed along the circumferential direction of the pressure relief circular hole 4.
As shown in fig. 1, a plurality of base legs 6 are provided below the base 1; the base support legs 6 are arranged perpendicular to the base 1 and fixedly connected with the base 1 through welding or bolts; the base feet 6 are used to support the base 1. During testing, the base 1 is horizontally fixed on the ground of a test site through the base support legs 6.
Specifically, the base legs 6 are of a telescopic structure; the base foot 6 includes: an adjusting sleeve and an adjusting inner rod; the inside design of the shown adjusting sleeve is a threaded hole, the outer surface of the rod in the shown adjusting is provided with an external thread, the rod in the adjusting is sleeved with the adjusting sleeve through the thread, the sleeve length can be adjusted through rotating the adjusting rod, and then the whole length of the base support leg 6 is adjusted. Adjusting sleeve pipe and base 1 fixed connection, the pole supports subaerial in the regulation, through the length of adjusting each base stabilizer blade 6, at uneven ground, can adjust base 1 and keep the level.
As shown in fig. 2, the cartridge limiting base 2 includes: disc installation part and cylindrical explosive column fixing part.
Specifically, the disc installation part of the grain limiting base 2 is installed in the pressure relief round hole 4 of the base 1. The cylindrical explosive column fixing part is arranged in the center of the disc mounting part, and an explosive column mounting groove is formed in the cylindrical explosive column fixing part; the diameter of the grain mounting groove is equal to the diameter of the cylindrical grain 13 to be tested. The explosive column 13 to be tested is arranged in the explosive column mounting groove and is supported and positioned through the explosive column mounting groove.
Further, as shown in fig. 2, a plurality of prefabricated cracks 14 are arranged on the disc mounting portion of the explosive column limiting base 2, and the prefabricated cracks 14 are used for preventing the base 1 from being damaged by shock waves generated when the explosive column 13 to be detected explodes. Specifically, the pre-crack 14 includes a plurality of arc-shaped cracks distributed along the circumferential direction of the charge column limiting base 2 and a plurality of linear cracks extending along the radial direction of the charge column limiting base 2.
The probe positioning unit 3 is described below:
in one embodiment of the present invention, as shown in fig. 4, the probe positioning unit 3 includes: a vertical rotating rod 7 and a positioning crossbar assembly 15. Specifically, as shown in fig. 4, the vertical rotation rod 7 is installed perpendicular to the base 1; the positioning rail assembly 15 is vertically installed on the vertical rotating rod 7.
In one embodiment of the present invention, the vertical rotating rod 7 includes: the upper cylindrical section, the middle boss and the lower screw column section. Specifically, a stud section of the vertical rotating rod 7 is inserted into the arc-shaped sliding groove 5 on the base 1, a fixing nut is screwed on the stud section through threads, and the vertical rotating rod 7 can be clamped and fixed on the base 1 by screwing the fixing nut; the base 1 is located between the fixing nut and the boss.
Further, the probe positioning unit 3 further includes: a connecting piece 16.
The connecting member 16 is provided with a first mounting hole and a second mounting hole, and the first mounting hole and the second mounting hole are perpendicular to each other.
As shown in fig. 3, the connecting member 16 is sleeved on the cylindrical section of the vertical rotating rod 7; specifically, a first mounting hole is formed in the connecting piece 16, the vertical rotating rod 7 is inserted into the first mounting hole of the connecting piece 16, and an insulating bushing 21 is arranged between the vertical rotating rod 7 and the connecting piece 16. The connecting piece 16 is installed on the vertical rotating rod 7 through the first installation hole in a sleeved mode and can rotate around the axis of the vertical rotating rod 7, a fastening bolt which penetrates through the first installation hole is arranged on the side surface of the connecting piece 16, and the connecting piece 16 can be fixed on the vertical rotating rod 7 by screwing the fastening bolt.
Further, a positioning rail assembly 15 is mounted on the vertical rotation rod 7 through a connection member 16.
Specifically, the positioning rail assembly 15 is mounted in the second mounting hole of the connecting member 16. Since the first and second mounting holes are perpendicular, the positioning rail assembly 15 is perpendicular to the vertical rotating rod 7.
Further, as shown in fig. 4 and 5, the positioning rail assembly 15 includes: a positioning cross rod 17, a cross rod insulating end 18, a first limiting piece 19, a spring 20 and a first fastening jackscrew 22.
Specifically, the positioning cross bar 17 is slidably mounted in the second mounting hole of the connecting piece 16; the second mounting hole is a rectangular hole, the second mounting hole is rectangular and can limit the rotation of the positioning cross rod 17 in the second mounting hole, and the positioning cross rod 17 can slide relative to the connecting piece 16.
Specifically, the first limiting member 19 and the spring 20 are both sleeved on the positioning cross rod 17, as shown in fig. 5. The first limiting member 19 is provided with a first fastening jackscrew 22, and the relative fixation or relative sliding between the first limiting member 19 and the positioning cross rod 17 can be realized by screwing or unscrewing the first fastening jackscrew 22. The spring 20 is disposed between the first retaining member 19 and the connecting member 16.
During implementation, the length of the positioning cross rod 17 penetrating out of the connecting piece 16 can be adjusted by adjusting the installation position of the first limiting piece 19 on the positioning cross rod 17, and then the cross rod insulating end 18 is pressed on the surface of the explosive column 13 to be detected through the spring 20.
Further, as shown in fig. 3, the positioning rail assembly 15 further includes: a second retaining member 26 and a second fastening screw 27. The second limiting member 26 is disposed at an end of the positioning cross bar 17, and the first limiting member 19 and the second limiting member 26 are disposed at two sides of the connecting member 16. The second limiting member 26 is provided with a second fastening jackscrew 27, and the relative fixation or relative sliding between the second limiting member 26 and the positioning cross rod 17 can be realized by screwing or unscrewing the second fastening jackscrew 27. The first and second fastening screws are used to fix the first and second limiting members 19 and 26, respectively, to the positioning cross bar 17.
Further, as shown in fig. 6 and 7, the beam insulation end 18 is provided with a probe trace through hole 24 and a cylindrical insulation end plug part 25. The insulating end plug-in part 25 of the cross rod insulating end 18 is matched with the plug-in hole of the positioning cross rod 17, and the cross rod insulating end 18 is installed at the end part of the positioning cross rod 17 in a plug-in mode through the matching of hole columns.
Specifically, the test probe 8 is composed of two enameled wires wound in a spiral shape, the wound portions of the two enameled wires are insulated from each other, and the other end of the two enameled wires is exposed out of the metal wire.
Further, the positioning rail 17 and the rail insulation end 18 are hollow tubes.
The positioning cross bar 17 is provided with a threading through hole, and the probe routing through hole 24 of the cross bar insulating end 18 is communicated with the threading through hole of the positioning cross bar 17 to form a channel for the test probe 8 to pass through.
Further, the cross bar insulating end 18 is provided with an offset front end surface, and the front end surface is perpendicular to the positioning cross bar 17; the front end face is provided with a linear probe positioning groove 23. The probe positioning groove 23 is used for fixing the test probe 8 on the front end surface of the cross bar insulating end 18. As shown in fig. 6 and 7, after the end of the test probe 8 passes through the probe trace through hole 24, the portion of the test probe 8 extending out of the probe positioning groove 23 is bent backward, and the two ends of the enameled wire at the end of the test probe 8 are separated and adhered to the side of the insulating end 18 of the cross bar by using an insulating tape. Specifically, the probe positioning grooves 23 of the multiple sets of positioning cross bar assemblies 15 of the same probe positioning unit 3 are all horizontally installed and have the same offset direction.
In implementation, the test probes 8 are fixedly attached to the side surface of the explosive column 13 to be tested through the plurality of probe positioning units 3, one ends of the test probes 8, which are exposed out of the metal wires, penetrate out of the rear ends of the positioning cross rods 17 and are connected with coaxial cable signal lines 9, and signal input channels of the RC pulse network generator 10 are connected with each test probe 8 through the coaxial cable signal lines 9; the dynamic signal acquisition system 12 is connected with the signal output channel of the RC pulse network generator 10 through a synchronization signal line 11.
The installation height, position and number of the positioning rails 17 can be arbitrarily adjusted by adjusting the installation position and number of the links 16 on the vertical rotating rods 7. By adjusting the direction of the positioning cross rod 17, the axial direction of the positioning cross rod 17 is directed to the center of burst. By adjusting the position of the first limiting member 19, the length of the positioning cross rod 17 extending out of the connecting member 16 is adjusted. The test probe 8 on the front end face of the cross rod insulating end 18 is in close contact with the explosive column 13 to be tested, and the axial direction of the positioning cross rod 17 points to the axial line of the explosive column 13 to be tested.
As shown in fig. 6 and 7, the test probe 8 penetrates through the cross rod insulating end 18 and the positioning cross rod 17, the test probe 8 is tightly clamped and fixed in the probe positioning groove 23 on the front end face of the cross rod insulating end 18, the redundant part is bent backwards, the section of the test probe 8 is separately fixed on the side face of the cross rod insulating end 18 by using an insulating tape, and two branches are conducted under the action of detonation wave ionization during testing, so that the monitoring of the detonation moment of a detection point position is realized.
In a specific embodiment of the present invention, one end of the test probe 8 is fixed at the end of the positioning cross bar assembly 15 and is in tight contact with the to-be-tested explosive column 13; the other end of the test probe 8 is connected with a coaxial cable signal wire 9. One end of the coaxial cable signal wire 9 is connected with the test probe 8, and the other end is connected with the RC pulse network generator 10. The RC pulse network generator 10 is connected to a dynamic signal acquisition system 12 through a synchronization signal line 11.
In a specific embodiment of the present invention, the contact position between the surface of the to-be-tested grain 13 and the plurality of test probes 8 is used as a monitoring point; the test probe 8 is used for monitoring whether the corresponding monitoring point position is detonated or not. Specifically, as shown in fig. 1, the probe positioning units 3 are four groups, and are uniformly distributed in the circumferential direction of the grain 13 to be tested. As shown in fig. 3, one probe positioning unit 3 includes four sets of the positioning beam assemblies 15. Four sets of the positioning rail assemblies 15 are mounted in parallel on the vertical rotary rod 7.
In this embodiment, four probe positioning units 3 are installed, and four positioning cross bar assemblies 15 are installed on each probe positioning unit 3, for a total of sixteen positioning cross bar assemblies 15, so as to fix sixteen test probes 8; correspondingly, sixteen monitoring points are arranged on the side surface of the grain 13 to be detected; the location distribution of the monitoring points is shown in fig. 8.
Example 2
According to the multi-probe positioning test method for testing detonation growth, the test method adopts the multi-probe positioning acquisition device for testing detonation growth in embodiment 1 to test the explosive column 13 to be tested.
The test method comprises the following steps:
step 1: installing the explosive column 13 to be tested on the multi-probe positioning and collecting device for testing detonation growth;
step 2: detonating the explosive column 13 to be tested;
and step 3: and monitoring a plurality of monitoring point positions on the surface of the explosive column 13 to be detected through a plurality of test probes 8.
In the step 1, the installation process of the grain 13 to be tested includes:
step S11: horizontally fixing a base 1 on the ground of a test site through base support legs 6;
step S12: installing a powder column limiting base 2 in a pressure relief round hole 4 in the center of a base 1, and installing a powder column 13 to be tested in a powder column installation groove on the powder column limiting base 2;
step S13: inserting the lower end part of the vertical rotating rod 7 into the circular arc-shaped sliding groove 5 of the base 1; a fixing nut is screwed on the screw column section at the lower end of the vertical rotating rod 7 in a threaded manner, and the vertical rotating rod 7 is fixed on the base 1 by screwing the fixing nut; an insulating bush 21 is fitted over the cylindrical section of the upper portion of the vertical rotation rod 7, and the cylindrical section of the vertical rotation rod 7 is inserted into the first mounting hole of the connection member 16.
Step S14: assembling the positioning cross bar assembly 15, and slidably mounting the positioning cross bar assembly 15 on the connecting piece 16;
step S15: mounting a test probe 8 on the positioning cross bar assembly 15; and adjusting the positioning cross rod assembly 15, pointing the axial direction of the positioning cross rod assembly 15 to the axial line of the explosive column 13 to be tested, and enabling the test probe 8 to be tightly propped against the outer surface of the explosive column 13 to be tested.
Further, in step S14, the assembly process of the positioning rail assembly 15 is as follows:
s14-1, inserting the insulating end plug-in part 25 of the cross rod insulating end 18 into the plug-in hole at one end of the positioning cross rod 17, and installing the cross rod insulating end 18 at the end part of the positioning cross rod 17 through the matching of the column holes; rotating the cross rod insulating end 18 to enable the probe positioning groove 23 on the front end surface to be horizontal, wherein the offset directions of the front end surfaces of a plurality of cross rod insulating ends 18 on the same group of probe positioning units 3 are consistent;
s14-2, sequentially sleeving and installing a first limiting piece 19 and a spring 20 at the other end of the positioning cross rod 17, and installing a first fastening jackscrew 22 on the side surface of the first limiting piece 19; the positioning rail 17 is inserted into the second mounting hole of the connecting piece 16 and the spring 20 is arranged between the connecting piece 16 and the first stop 19.
S14-3: a second limiting piece 26 is sleeved and installed at the end of the positioning cross rod 17 penetrating through the connecting piece 16, and a second fastening jackscrew 27 is installed on the side surface of the second limiting piece 26.
When the first fastening jackscrew 22 is screwed, the first limiting piece 19 is fixedly arranged on the positioning cross rod 17; when the second fastening jackscrew 27 is screwed, the second limiting member 26 is fixedly installed on the positioning cross rod 17, and the positioning cross rod 17 is limited by the first limiting member 19 and the second limiting member 26, so that the positioning cross rod 17 cannot be separated from the connecting member 16.
Further, in step S15, the mounting process of the test probe 8 is:
s15-1, the test probe 8 is composed of two enameled wires which are mutually wound into a spiral shape, and the wound parts of the two enameled wires are mutually insulated; one end of the test probe 8 sequentially passes through the threading through hole inside the positioning rail 17 and the probe routing through hole 24 of the rail insulating end 18 and penetrates out of the probe routing through hole 24 of the rail insulating end 18.
S15-2, fixing the penetrating part of the test probe 8 in a probe positioning groove 23 on the end face of the insulating end 18 of the transverse rod, bending the part of the test probe 8, which extends out of the probe positioning groove 23, backwards, and separating two enameled wires at the tail end of the test probe 8 and adhering the two enameled wires on the side face of the insulating end 18 of the transverse rod by using an insulating adhesive tape. The other end of the test probe 8 is exposed out of the metal wire and is connected with the coaxial cable signal wire 9 through two metal wires.
Further, in step S15, the adjusting process of the positioning rail assembly 15 is as follows:
s15-3: adjusting the height and axial direction of the positioning cross bar assembly 15;
loosening the fastening bolt on the side surface of the connecting piece 16 to enable the connecting piece 16 to slide along the vertical rotating rod 7 and rotate around the axis of the vertical rotating rod 7; the dragging connecting piece 16 and the positioning cross rod assembly 15 slide along the axial direction of the vertical rotating rod 7, and the height of the positioning cross rod assembly 15 is adjusted; the rotary connecting piece 16 and the positioning cross rod assembly 15 adjust the axis of the positioning cross rod assembly 15 to point to the axis of the to-be-detected explosive column 13; after the positioning cross rod assembly 15 is adjusted to the required height and direction according to the test requirements, the fastening bolts on the connecting pieces 16 are screwed again for fixing.
S15-4: adjusting the position of the positioning cross rod assembly 15 according to the distance between the side surface of the to-be-tested explosive column 13 and the vertical rotating rod 7, so that the test probe 8 is in close contact with the to-be-tested explosive column 13;
firstly, loosening the first fastening jackscrew 22 to enable the first limiting piece 19 to slide along the positioning cross rod 17;
then, the first limiting member 19 is moved to reduce the distance between the first limiting member 19 and the connecting member 16, so that the spring 20 is compressed; screwing the first fastening jackscrew 22 to fix the first limiting piece 19 and the positioning cross rod 17;
finally, when the spring 20 is compressed, the elastic force of the spring 20 can push the first position-limiting member 19 to move in a direction away from the connecting member 16, so as to drive the positioning cross rod 17 and the cross rod insulating end 18 to move in a direction towards the explosive column 13 to be tested, so that the test probe 8 on the cross rod insulating end 18 can be abutted against the surface of the explosive column 13 to be tested.
Further, the multiple groups of positioning cross rod assemblies 15 are adjusted, so that the multiple test probes 8 are in contact with multiple monitoring point positions on the surface of the explosive column 13 to be tested.
Further, in step 3, when the monitoring point of the grain 13 to be monitored detonates, two enameled wires at the tail end of the test probe 8 are conducted in a detonation ionization environment, and meanwhile, an electric signal can be sequentially transmitted to the RC pulse network generator 10 and the dynamic signal acquisition system 12 through the coaxial cable signal line 9 and the synchronous signal line 11, so that the monitoring of the detonation moments of a plurality of monitoring points is realized.
Further, in the step 3, after the explosive column 13 to be detected is detonated, the initiation moments of a plurality of monitoring points on the outer surface of the explosive column 13 to be detected are monitored through a plurality of testing probes 8, so that the initiation process and the detonation propagation process of the explosive column 13 to be detected are detected.
Compared with the prior art, the technical scheme provided by the invention has at least one of the following beneficial effects:
1) The invention provides a multi-probe positioning and collecting device for testing detonation growth, which can randomly adjust the mounting height and the number of positioning cross rods 17 by adjusting the number of vertical rotating rods 7, the number of connecting pieces 16 and the mounting positions of the connecting pieces on the vertical rotating rods 7; the invention can be directly installed in an explosion test field and has enough intensity and rigidity for resisting explosion impact.
2) According to the multi-probe positioning and collecting device for testing detonation growth, the preformed crack 14 is designed on the explosive column limiting base 2, so that damage of shock waves to a base in a test is prevented; and only need change the spacing base 2 of explosive column and fix a position horizontal pole subassembly 15 and can carry out many times experimental, the equipment is convenient and the cost is lower.
3) According to the invention, the positioning cross rod 17 is provided with the spring 20 and the first limiting piece 19 for pre-tightening, and the connecting piece 16 is rotatably arranged on the vertical rotating rod 7, so that the positioning cross rod assemblies 15 can adjust the positions, the plurality of positioning cross rod assemblies 15 move independently without interference, and the plurality of test probes 8 can be ensured to be in close contact with corresponding monitoring point positions on the explosive column 13 to be tested, so that the measurement accuracy of the multi-channel probe is ensured.
4) According to the multi-probe positioning and collecting device for testing detonation growth, the insulating layer is arranged between the probe positioning cross rod and the vertical rotating rod, and the end of the positioning cross rod is also made of the insulating material, so that the inter-channel interference caused by the short circuit of the multi-channel probe in a detonation ionization environment can be prevented, and the accuracy of signals is improved. The multi-probe positioning and collecting device for testing detonation growth is made of stainless steel or common carbon steel by surface plastic spraying, and has sufficient strength and rigidity and good corrosion resistance in various atmospheric environments.
5) Compared with the traditional optical shooting method, the method avoids the influence of air rarefaction waves on the detonation propagation process of the exposed explosive, collects the electric signals of the detonation ionization conduction probe to monitor the detonation process, and can more accurately measure the characteristic parameters of the detonation waves.
6) According to the multi-probe positioning acquisition device for testing detonation growth, the positioning cross rod assembly 15 is adjusted in position, so that the detonation process of the explosive columns 13 to be tested with different sizes can be monitored, the detonation evolution process can be represented by the characteristic parameters such as the first-out position, the detonation diffraction area, the curvature change area (detonation growth area), the stable detonation area and the local non-detonation area (detonation dead zone), and the device has higher expansibility.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. The utility model provides a test detonation growth's many probes location collection system which characterized in that includes: the device comprises a base (1), a grain limiting base (2), a probe positioning unit (3) and a test probe (8);
the explosive column limiting base (2) is arranged at the center of the base (1), and the explosive column (13) to be tested is arranged on the explosive column limiting base (2); the probe positioning unit (3) is arranged on the base (1);
a plurality of groups of probe positioning units (3) are arranged in the circumferential direction of the explosive column (13) to be detected;
the test probe (8) is fixedly installed on the probe positioning unit (3), and the test probe (8) is tightly abutted to the outer surface of the to-be-tested explosive column (13) through the probe positioning unit (3).
2. The multi-probe positioning acquisition device for testing detonation growth according to claim 1, characterized in that said probe positioning unit (3) comprises: a vertical rotating rod (7) and a positioning cross bar assembly (15); the vertical rotating rod (7) is perpendicular to the base (1); the positioning cross rod assembly (15) is vertically installed on the vertical rotating rod (7).
3. The detonation growth test multi-probe positioning and collecting device according to claim 2, wherein one end of the test probe (8) is fixed at the end of the positioning cross bar assembly (15) and is in abutting contact with the explosive column to be tested (13); the other end of the test probe (8) is connected with a coaxial cable signal wire (9).
4. The multi-probe positioning and collecting device for testing detonation growth according to claim 3, wherein one end of the coaxial cable signal line (9) is connected with the test probe (8), and the other end is connected with the RC pulse network generator (10).
5. The multi-probe positioning acquisition device for testing detonation growth according to claim 4, characterized in that the RC pulse network generator (10) is connected with a dynamic signal acquisition system (12) through a synchronization signal line (11).
6. The device for multi-probe positioning collection of detonation growth test according to claim 5, characterized in that the contact position of the surface of the explosive column (13) to be tested and a plurality of test probes (8) is used as a monitoring point; and the test probe (8) is used for monitoring the detonation wave emergence moment of the corresponding monitoring point position.
7. The device for detecting the detonation growth multiple-probe positioning and collecting according to claim 6, wherein the probe positioning units (3) are provided with multiple groups, and are uniformly distributed in the circumferential direction of the explosive column (13) to be detected.
8. The multi-probe positioning and collecting device for testing detonation growth according to any one of claims 2-7, characterized in that one probe positioning unit (3) comprises a plurality of sets of the positioning cross-bar assemblies (15).
9. The multi-probe positioning and collecting device for testing detonation growth according to claim 8, characterized in that a plurality of sets of positioning cross bar assemblies (15) are mounted side by side on the vertical rotating rod (7).
10. A multi-probe positioning test method for testing detonation growth, which is characterized in that the test method adopts the multi-probe positioning collection device for testing detonation growth according to any one of claims 1 to 9; the test method comprises the following steps:
step 1: installing a to-be-tested explosive column (13) on the multi-probe positioning and collecting device for testing detonation growth;
step 2: detonating a charge (13) to be tested;
and 3, step 3: and monitoring a plurality of monitoring point positions on the surface of the explosive column (13) to be detected through a plurality of test probes (8).
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