CN115791454A - Device and method for testing anti-explosion performance of cylindrical structural material - Google Patents
Device and method for testing anti-explosion performance of cylindrical structural material Download PDFInfo
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- CN115791454A CN115791454A CN202211429901.3A CN202211429901A CN115791454A CN 115791454 A CN115791454 A CN 115791454A CN 202211429901 A CN202211429901 A CN 202211429901A CN 115791454 A CN115791454 A CN 115791454A
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Abstract
The invention provides a device for testing the antiknock performance of a cylindrical structural material, which comprises: the sleeve is suitable for being sleeved outside the circular tube sample; a sensor having a probe; the probe is positioned at the inner side of the sleeve and is suitable for abutting against the outer wall of the circular tube sample; the collapsible sleeve is positioned in the sleeve; the outer diameter of the collapsible sleeve is the same as the inner diameter of the round pipe sample; the collapsible sleeve is provided with a dividing slit along the axial direction, so that the collapsible sleeve is divided into a plurality of pieces; the inner side surface of the collapsible sleeve is a conical surface and is coaxial with the outer side surface of the collapsible sleeve; the cone is positioned on the inner side of the expansion sleeve and is suitable for moving along the axial direction of the expansion sleeve; the outer surface of the conical body is matched with the inner side surface of the expansion sleeve; and the baffle is arranged between the sleeve and the expansion sleeve and used for limiting the relative position of the sleeve and the expansion sleeve in the axial direction. The device overcomes the defect of poor safety of the pipe fitting antiknock performance test in the prior art. The invention also provides a test method using the device.
Description
Technical Field
The invention relates to the technical field of pipe fitting anti-explosion performance testing, in particular to a device and a method for testing the anti-explosion performance of a cylindrical structural material.
Background
The metal round tube is applied to the design of novel explosion-proof tanks and pressure containers, and the expansion and crushing and the anti-explosion impact protection of the metal round tube are the focuses of the dynamic damage of materials of the metal round tube. Because of the limitation of test working conditions and technical means, the most direct means for researching the anti-explosion performance of the material circular tube structure is an explosion expansion experiment, namely, explosives are filled in the circular tube, the purpose of controlling the explosion load intensity is achieved by controlling the quality of the filled explosives, and shock waves generated by explosion of the explosives are spread outwards along the radius direction of the circular tube; however, the method has certain potential safety hazard, and the shock waves and fragments generated by explosion pose certain threat to the safety of operators and experimental devices.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect of poor safety of the pipe fitting anti-explosion performance test in the prior art.
In order to solve the above technical problem, the present application provides a drum structure material antiknock performance testing arrangement for test pipe sample includes:
the sleeve is suitable for being sleeved outside the circular tube sample;
a sensor having a probe; the probe is positioned at the inner side of the sleeve and is suitable for abutting against the outer wall of the circular tube sample;
the collapsible sleeve is positioned in the sleeve; the outer diameter of the collapsible sleeve is the same as the inner diameter of the round pipe sample; the collapsible sleeve is provided with a dividing slit along the axial direction, so that the collapsible sleeve is divided into a plurality of pieces; the inner side surface of the collapsible sleeve is a conical surface and is coaxial with the outer side surface of the collapsible sleeve;
the cone is positioned on the inner side of the expansion sleeve and is suitable for moving along the axial direction of the expansion sleeve; the outer surface of the conical body is matched with the inner side surface of the expansion sleeve;
and the baffle is arranged between the sleeve and the expansion sleeve and used for limiting the relative position of the sleeve and the expansion sleeve in the axial direction.
Optionally, the method further comprises:
an impact bar;
the launching device is arranged at the large end side of the conical body and is suitable for launching the impact rod, so that the impact rod moves towards the conical body along the axis of the conical body and collides with the large end plane of the conical body;
the end surface of the large end of the conical body is a plane vertical to the axis of the conical body; before the impact rod is launched, the outer surface of the conical body is tightly attached to the inner side surface of the expansion sleeve.
Optionally, the sensor has a plurality of sensors, and the plurality of sensors are uniformly distributed along the circumferential direction of the sleeve.
Optionally, the sensor is threadedly connected to the sleeve through the housing; the axis of the shell points to the axis of the sleeve.
Optionally, the housing extends through a wall of the sleeve.
Optionally, each petal of the collapsible sleeve is provided with a baffle, the baffle is arranged at the large opening end of the collapsible sleeve, and the baffle extends towards the outside of the collapsible sleeve and is abutted against the end face of the sleeve.
A method for testing the anti-explosion performance of a cylindrical structural material uses the device for testing the anti-explosion performance of the cylindrical structural material and comprises the following steps:
s1: sleeving the circular tube sample outside the collapsible sleeve and inserting the circular tube sample into the sleeve;
s2: ensuring that a probe of the sensor is abutted against the outer side surface of the circular tube sample;
s3: the cone-shaped body obtains kinetic energy towards the small end, and the expansion sleeve generates expansion force through the matching between the cone-shaped body and the expansion sleeve;
s4: the sensor measures the time-varying curve of the deformation or fragment displacement of the round pipe sample caused by the expansion of the collapsible sleeve;
s5: and calculating the antiknock performance of the round pipe sample according to the recorded data of the sensor.
Optionally, when the device for testing the anti-explosion performance of the cylinder structural material further comprises an impact rod and a launching device, in step S3, the impact rod is launched towards the large end of the conical body by the launching device, and the impact rod enables the conical body to obtain kinetic energy through collision.
Alternatively, when the sensor is threadably connected to the cartridge via the housing, and the housing extends through the cartridge,
in step S1, the shell is rotated outwards, so that the axial distance between the probe and the sleeve is larger than the radius of the circular tube sample; then inserting the round pipe sample into the sleeve;
in step S2, the case is rotated inward to bring the probe into contact with the outer wall of the round tube sample.
Optionally, in step S5, the stress σ applied to the round tube sample in the radial direction is calculated,
σ＝ρha r ；
wherein rho is the density of the round tube sample, h is the thickness of the round tube sample, a r Radial acceleration of the sample is round tube;
the strain epsilon of the round tube sample in the radial direction is calculated,
wherein r0 is the initial radius of the round pipe sample, and r is the radius after stress deformation.
By adopting the technical scheme, the invention has the following technical effects:
1. according to the device for testing the anti-explosion performance of the cylindrical structural material, the cone body and the expansion sleeve are matched, so that the cone body obtains kinetic energy, the axial kinetic energy is converted into expansion force of the expansion sleeve in the radial direction, the impact effect of explosion is simulated, the expansion of mechanical energy is used for replacing explosion of chemical energy, compared with an experiment scheme for filling explosives, the danger of operating explosives can be avoided, the safety of an experiment environment is greatly improved, particularly for an indoor laboratory, protection measures related to explosion do not need to be set, and the experiment cost is greatly reduced. In addition, the pressure of the explosion core area and the pressure of the explosion edge area are different, so that the expansion force is not easy to be uniformly distributed in the axial direction of the pipe fitting, and the sensor and the explosion core are located at different axial positions to cause measurement value deviation; however, other explosion simulation schemes, such as the scheme that the plastic body generates radial plastic deformation after violently impacting a hard object to simulate explosion, can only generate expansion force near the collision point, and cannot generate uniform expansion acting force on the whole length of the pipe, so that performance of the inside of the pipe when bearing pressure equalization (such as high-pressure liquid) is difficult to simulate, and the plastic body of the plastic body is easy to cause the problem of inconsistent deformation in all directions during the radial plastic deformation due to different compactness degrees in the material. The expansion sleeve is uniformly extruded and expanded by the conical body through the inclined plane in the axial movement process, so that the generated expansion force is highly uniform in radial distribution and axial distribution of the pipe fitting, the working condition of the pipe fitting when bearing pressure equalization can be simulated, the over-high requirement on the axial relative position of the sensor is not required, the assembly precision requirement of each part in the test is reduced, the working amount is simplified, and the test efficiency is improved. In addition, as antiknock performance experiment, sometimes the pipe sample also can be because of the too big breakage of load, so the sleeve that this application set up not only plays the support effect of fixed sensor, still plays the protective sheath effect that prevents the fragment and fly off, makes the pipe sample after the fracture only remain in the space between sleeve and the harmomegathus cover, has protected personnel and the equipment around the experiment, and conveniently clears up the residual, can improve experimental efficiency.
2. The cylinder structural material antiknock performance testing device provided by the invention enables the cone to obtain kinetic energy in a mode of impacting the impact rod, compared with a scheme of directly launching the cone to collide after the cone enters the collapsible sleeve, the scheme can enable the cone outer side conical surface and the inner side conical surface of the collapsible sleeve to be tightly matched before an experiment, enables the axial movement of the cone to uniformly drive each petal of the collapsible sleeve to radially expand, avoids the situation that the expansion is not uniform due to the fact that the cone first acts with the collapsible sleeve locally due to the fact that the launching direction is inclined, and even if the launching direction of the impact rod is inclined, the cone can be driven to correctly move along the axial direction after collision, enables the collapsible sleeve to synchronously expand, and is closer to the simulation of a real explosion effect.
3. The device for testing the antiknock performance of the cylindrical structural material provided by the invention adjusts the distance between the sensor and the axis of the sleeve through threaded connection, so that the problem that the sensor is difficult to install due to narrow distance when a circular tube sample is inserted can be avoided, the sensor can be attached to the top after the sensor is installed due to large distance adjustment so as to ensure the experimental precision, and the device can be suitable for circular tube samples with different diameters. In addition, the housing 32 penetrates the wall of the cartridge 2, so that the housing 32 can be easily handled from the outside of the device, and the adjustment work can be simplified.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a front view of a schematic construction of a sleeve portion of an embodiment of the present invention;
FIG. 2 is a schematic structural view of a sleeve portion at a sensor cross-section according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a sensor according to an embodiment of the present invention;
FIG. 4 is a schematic front view of the collapsible portion of the embodiment of the present invention;
FIG. 5 is a schematic left side view of the collapsible sleeve of the embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a transmitting device according to an embodiment of the present invention;
FIG. 7 is a schematic view of the movement of the cone of an embodiment of the present invention;
fig. 8 is a schematic diagram of the movement of the collapsible portion according to an embodiment of the present invention.
Description of reference numerals:
1-base, 2-sleeve, 3-sensor, 4-collapsible sleeve, 5-cone, 6-round tube sample, 7-bolt, 8-impact rod, 23-threaded hole, 31-probe, 32-shell, 33-strain gauge, 34-lead, 41-through hole, 42-parting crack, 43-baffle.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The embodiment provides a device for testing the antiknock performance of a cylindrical structural material, which is used for testing a circular tube sample 6.
In one embodiment, as shown in fig. 1 to 8, it comprises a sleeve 2, a sensor 3, a collapsible sleeve 4, a cone 5 and a baffle 43. The sleeve 2 is suitable for being sleeved outside the circular tube sample 6, and a base 1 can be arranged for connecting a test bed or the ground. The sensor 3 has a probe 31; the probe 31 is located inside the sleeve 2 and is adapted to abut the outer wall of the round tube sample 6. The collapsible jacket 4 is located within the sleeve 2. The outside diameter of the collapsible sleeve 4 is the same as the inside diameter of the round tube sample 6. The collapsible sleeve 4 is provided with a dividing slit 42 along the axial direction, so that the collapsible sleeve 4 is divided into a plurality of pieces. The inner side surface of the expansion sleeve 4 is a conical surface and is coaxial with the outer side surface of the expansion sleeve 4. The cone 5 is located inside the collapsible sleeve 4 and is adapted to move in the axial direction of the collapsible sleeve 4. The outer surface of the conical body 5 is matched with the inner side surface of the expansion sleeve 4. The baffle 43 is arranged between the sleeve 2 and the expansion sleeve 4 and used for limiting the relative position of the sleeve 2 and the expansion sleeve 4 in the axial direction and preventing the cone 5 in a moving state from pushing the expansion sleeve 4 to generate axial displacement.
When the device is used, the method comprises the following steps:
s1: the round tube sample 6 is sleeved outside the collapsible sleeve 4 and inserted into the sleeve 2.
S2: the probe 31 of the sensor 3 is ensured to abut against the outer side surface of the round tube sample 6.
S3: the cone-shaped body 5 obtains the kinetic energy towards the small end, and the expansion force is generated on the expansion sleeve 4 through the matching between the cone-shaped body 5 and the expansion sleeve 4. As shown in fig. 7 and 8, when the axial velocity of the cone 5 is v0, the radial velocity of the outer surface particles is v1; according to the continuity condition at the interface, the particle velocity of the cone 5 and the collapsible sleeve 4 at the interface impact is equal to the axial velocity v1 of the cone 5. Therefore, when the inclination angle of the mating taper surface is θ shown in fig. 8, the velocity of the collapsible sleeve 4 in the radial direction
S4: the sensor 3 measures the time-varying curve of the deformation or the chip displacement of the round pipe sample 6 caused by the expansion of the collapsible sleeve 4.
S5: the antiknock performance of the round tube sample 6 was calculated from the recorded data of the sensor 3.
The anti-knock performance may include the stress, the strain, and the strain rate of the round pipe sample 6.
With respect to the calculation of the stress to which the sample 6 of the round pipe is subjected, assuming that the round pipe is broken after being subjected to a radial stress, a small piece of a piece with mass m is taken for analysis, and the movement of the small piece of the piece follows the kinetic equation in the radial direction:
F＝ma
setting the force on the radial section of the circular tube sample 6 as Fr; σ is the stress of the round tube sample 6 in the radial direction; the area of the fragments is A; h is the thickness of the round tube sample 6; ar is the radial acceleration of the fragments of the round tube sample 6, which can be known from the time-dependent curve of the deformation or fragment displacement measured by the sensor 3, from which:
F r ＝ma r ＝σA；
from the above equation:
σ＝ma r /A＝ρha r ；
regarding the calculation of the strain of the round tube sample 6, if the initial radius of the round tube sample 6 is r0; the radius increases to r after radial stress, and the radius can be obtained according to the deformation quantity measured by the sensor 3; the strain in the radial direction of the round tube sample 6 becomes:
deriving the available radial strain rate:
wherein the content of the first and second substances,
is the change of the radial displacement of the round pipe fragment in motion with time. The above formula is introduced into a computer program, and then a continuous curve of stress, strain and strain rate can be obtained through a computer.
The device makes the cone 5 convert its ascending kinetic energy in the axial into the expansion force of expansion cover 4 on radial through using the cooperation between cone 5 and expansion cover 4 behind the kinetic energy acquisition to simulate out the impact effect of explosion, it has utilized the expansion of mechanical energy to replace the explosion of chemical energy, compare the experimental scheme of filling the explosive and can avoid the danger of operation explosive, make the security of experimental environment improve greatly, especially to indoor laboratory, needn't set up the relevant safeguard measure of explosion again, make experimentation cost greatly reduced. In addition, the pressure of the explosion core area and the pressure of the explosion edge area of the explosion scheme are different, so that the expansion force is not easy to be uniformly distributed in the axial direction of the pipe fitting, and the sensor 3 is positioned at different axial positions with the explosion core to cause the deviation of the measured value; however, other explosion simulation schemes, such as the scheme that the explosion is simulated by generating radial plastic deformation after the plastomer violently impacts a hard object, can only generate expansion force near the collision point, and cannot generate uniform expansion acting force on the whole length of the pipe, so that the performance of the inside of the pipe when the inside of the pipe bears pressure equalization (such as high-pressure liquid) is difficult to simulate, and the plastomer of the plastomer is easy to cause the problem of inconsistent deformation in each direction due to different compactness degrees in the material. The expansion sleeve 4 is uniformly extruded to expand by the cone 5 through the inclined plane in the axial movement process, so that the generated expansion force is distributed in the radial direction and the axial direction of the pipe fitting and has high uniformity, the working condition of the pipe fitting when bearing pressure equalization can be simulated, the over-high requirement on the axial relative position of the sensor 3 is not required, the assembly precision requirement of each part in the test is reduced, the operation amount is simplified, and the test efficiency is improved. In addition, after all, as the antiknock performance experiment, sometimes the pipe sample 6 can also be because of the too big breakage of load, so the sleeve 2 that this application set up not only plays the support effect of fixed sensor 3, still plays the protective sheath effect that prevents the fragment and scatter, makes the pipe sample 6 after the fracture only persist in the space between sleeve 2 and collapsible sleeve 4, has protected personnel and equipment around the experiment, and conveniently clears up the defective material, can improve experimental efficiency.
Based on the above embodiments, in an alternative embodiment, as shown in fig. 6, it further includes: an impact rod 8 and a launching device (not shown in the figure). One end of the impact rod 8 is a plane. The end surface of the large end of the cone 5 is a plane perpendicular to the axis of the cone 5. The launching device is arranged at the large end side of the conical body 5 and is suitable for launching the impact rod 8, so that the impact rod 8 moves towards the conical body 5 along the axis of the conical body 5, and the plane end of the impact rod 8 collides with the large end plane of the conical body 5. The launching device can adopt modes of high-pressure gas launching, spring launching, electromagnetic launching or gunpowder launching and the like, and can also adopt non-linear motion mechanisms such as a pendulum bob and the like, only the impact rod 8 is required to collide with the conical body 5 finally, and in addition, the impact rod 8 does not need to be separated from the launching device, can run in a set track and is convenient for recovery after collision. Before the impact rod 8 is launched, the outer surface of the conical body 5 is tightly attached to the inner side surface of the expansion sleeve 4.
Based on the test method of the foregoing embodiment, in an alternative embodiment, when the device for testing the anti-explosion performance of the cylindrical structural material further includes the impact rod 8 and the launching device, in step S3, the impact rod 8 is launched towards the large end of the conical body 5 by using the launching device, and the impact rod 8 makes the conical body 5 obtain kinetic energy through collision.
Compared with the scheme that the conical body 5 is directly launched to collide after entering the expansion sleeve 4, the scheme can enable the conical body 5 outside conical surface to be closely matched with the conical surface inside the expansion sleeve 4 before the experiment, enables the axial motion of the conical body 5 to uniformly drive each valve of the expansion sleeve 4 to radially expand, avoids the situation that the conical body 5 is firstly locally acted with the expansion sleeve 4 to cause uneven expansion due to the deflection of the launching direction, even if the launching direction of the impact rod 8 is deflected, the conical body 5 can be driven to correctly move along the axial direction after the collision, enables the expansion sleeve 4 to synchronously expand, and is closer to the simulation of the real explosion effect.
Based on the testing device of the above embodiment, in an alternative embodiment, as shown in fig. 1 and 2, the sensor 3 has a plurality of sensors 3, and the plurality of sensors 3 are uniformly distributed along the circumference of the sleeve 2. Therefore, the antiknock performance of the round pipe sample 6 in all directions can be measured, and the antiknock performance of the round pipe sample 6 can be comprehensively obtained.
Based on the testing apparatus of the above embodiment, in an alternative embodiment, as shown in fig. 1 to 3, the sensor 3 has a housing 32, a strain gauge 33 is disposed in the housing 32, a probe 31 of the strain gauge 33 can compress the strain gauge 33, and a lead 34 is connected to the strain gauge 33 to output a detected amount. The sensor 3 is in threaded connection with the sleeve 2 through the shell 32; the axis of the housing 32 is directed towards the axial center of the sleeve 2. Therefore, the distance between the sensor 3 and the axis of the sleeve 2 can be adjusted through threaded connection, the problem that the sensor 3 is difficult to mount due to narrow space when the circular tube sample 6 is inserted can be avoided, the sensor 3 can be attached to the top of the sleeve to ensure the experiment precision after the sensor 3 is mounted by adjusting the space to be large, and the device can be suitable for circular tube samples 6 with different diameters. Preferably, the housing 32 may extend through the wall of the cartridge 2, thereby facilitating handling of the housing 32 from outside the device, simplifying the adjustment work.
Thus, based on the test method of the previous embodiment, in an alternative embodiment, when the sensor 3 is screwed to the cartridge 2 through the housing 32, and the housing 32 penetrates the cartridge 2, the following operations can be performed:
in step S1, the housing 32 is rotated outward, so that the distance between the probe 31 and the axis of the sleeve 2 is greater than the radius of the circular tube sample 6; the round tube sample 6 was then inserted into the sleeve 2.
In step S2, the housing 32 is rotated inward, and the probe 31 is brought into contact with the outer wall of the round tube sample 6.
Based on the test device of the previous embodiment, in an alternative embodiment, as shown in fig. 4 and 5, each petal of the collapsible sleeve 4 is provided with a baffle 43, the baffle 43 is arranged at the large opening end of the collapsible sleeve 4, and the baffle 43 extends towards the outside of the collapsible sleeve 4 and abuts against the end surface of the sleeve 2. Although the baffle 43 may be disposed on the small opening side of the collapsible sleeve 4, for example, the baffle 43 extends inward from the end surface of the sleeve 2 and blocks the small opening end surface of the collapsible sleeve 4 to prevent the collapsible sleeve 4 from moving axially along with the cone 5, the baffle 43 preferably extends outward from the large opening end of the collapsible sleeve 4 to block the end surface of the sleeve 2, so that each lobe structure of the collapsible sleeve 4 obtains an extended part, thereby facilitating an operator to operate the collapsible sleeve 4 located inside the sleeve 2 through the baffle 43, and the baffle 43 not only performs a blocking function, but also performs a function similar to an operation handle, so that the blocked collapsible sleeve 4 is also convenient to operate, thereby improving the operation efficiency of adjusting the posture and the position thereof.
Based on the testing device of the above embodiment, in an alternative embodiment, the threaded hole 23 may be formed in the end surface of the sleeve 2, the through hole 41 may be formed in the baffle 43, and the bolt 7 is used to connect the baffle 43 and the sleeve 2, so as to form a substantial positioning for the collapsible sleeve 4, and then facilitate the installation of the cone 5. Of course, the through hole 41 and the bolt 7 must have a corresponding clearance, and the bolt 7 is not tightened so that the bolt 7 does not interfere with the expansion of the collapsible sleeve 4 thereafter.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. The utility model provides a drum constructional material antiknock performance testing arrangement for test pipe sample (6), its characterized in that includes:
the sleeve (2) is suitable for being sleeved on the outer side of the round pipe sample (6);
a sensor (3) having a probe (31); the probe (31) is positioned at the inner side of the sleeve (2) and is suitable for abutting against the outer wall of the circular tube sample (6);
the collapsible sleeve (4) is positioned in the sleeve (2); the outer diameter of the expansion sleeve (4) is the same as the inner diameter of the circular tube sample (6); the collapsible sleeve (4) is provided with a dividing slit (42) along the axial direction, so that the collapsible sleeve (4) is divided into a plurality of pieces; the inner side surface of the expansion sleeve (4) is a conical surface and is coaxial with the outer side surface of the expansion sleeve (4);
the conical body (5) is positioned on the inner side of the expansion sleeve (4) and is suitable for moving along the axial direction of the expansion sleeve (4);
the outer surface of the conical body (5) is matched with the inner side surface of the expansion sleeve (4);
and the baffle (43) is arranged between the sleeve (2) and the expansion sleeve (4) and is used for limiting the relative position of the sleeve (2) and the expansion sleeve (4) in the axial direction.
2. The apparatus for testing antiknock performance of cylindrical structural material according to claim 1, further comprising:
an impact bar (8);
the launching device is arranged on the large end side of the conical body (5) and is suitable for launching the impact rod (8), so that the impact rod (8) moves towards the conical body (5) along the axis of the conical body (5), and the impact rod (8) collides with the large end plane of the conical body (5);
the end surface of the large end of the conical body (5) is a plane vertical to the axis of the conical body (5); before the impact rod (8) is launched, the outer surface of the conical body (5) is tightly attached to the inner side surface of the expansion sleeve (4).
3. The device for testing the antiknock performance of the cylindrical structural material according to claim 1, wherein the sensors (3) are multiple, and the multiple sensors (3) are uniformly distributed along the circumferential direction of the sleeve (2).
4. The device for testing the antiknock performance of the cylindrical structural material according to claim 3, wherein the sensor (3) is in threaded connection with the sleeve (2) through the shell (32); the axis of the shell (32) points to the axis of the sleeve (2).
5. The explosion-proof performance testing device of the cylinder structural material as claimed in claim 4, wherein the housing (32) penetrates the wall of the sleeve (2).
6. The device for testing the antiknock performance of the cylindrical structural material according to claim 1, wherein each petal of the collapsible sleeve (4) is provided with a baffle (43), the baffle (43) is arranged at the large opening end of the collapsible sleeve (4), and the baffle (43) extends towards the outer side of the collapsible sleeve (4) and is abutted against the end face of the sleeve (2).
7. A method for testing the antiknock performance of a cylindrical structural material, which uses the apparatus for testing the antiknock performance of a cylindrical structural material according to any one of claims 1 to 6, and which comprises the steps of:
s1: sleeving the circular tube sample (6) on the outer side of the collapsible sleeve (4) and inserting the circular tube sample into the sleeve (2);
s2: ensuring that a probe (31) of the sensor (3) is abutted against the outer side surface of the circular tube sample (6);
s3: the conical body (5) obtains kinetic energy towards the small end, and the expansion sleeve (4) generates expansion force through the matching between the conical body (5) and the expansion sleeve (4);
s4: the sensor (3) measures the time-varying curve of the deformation or fragment displacement of the round pipe sample (6) caused by the expansion of the collapsible sleeve (4);
s5: and calculating the antiknock performance of the round pipe sample (6) according to the recorded data of the sensor (3).
8. The method for testing the anti-explosion performance of the cylindrical structural material according to claim 7, wherein when the device for testing the anti-explosion performance of the cylindrical structural material further comprises the impact rod (8) and the launching device, in step S3, the impact rod (8) is launched towards the large end of the conical body (5) by the launching device, and the impact rod (8) enables the conical body (5) to obtain kinetic energy through collision.
9. The method for testing the antiknock performance of the cylindrical structural material according to claim 7, wherein when the sensor (3) is screwed to the sleeve (2) through the housing (32) and the housing (32) penetrates the sleeve (2),
in the step S1, the shell (32) is rotated outwards, so that the distance between the probe (31) and the axis of the sleeve (2) is larger than the radius of the circular tube sample (6); then inserting the circular tube sample (6) into the sleeve (2); in step S2, the case 32 is rotated inward, and the probe 31 is brought into contact with the outer wall of the round tube sample 6.
10. The method for testing the antiknock performance of a cylindrical structural material according to claim 7, wherein in step S5, the stress σ in the radial direction applied to the round tube specimen (6) is calculated,
σ＝ρha r ；
wherein rho is the density of the round tube sample (6), h is the thickness of the round tube sample (6), and a r Radial acceleration of the circular tube sample (6);
calculating the strain epsilon of the round tube sample (6) in the radial direction,
wherein r is 0 The initial radius of the round tube sample (6) is shown, and r is the radius after stress deformation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211429901.3A CN115791454A (en) | 2022-11-14 | 2022-11-14 | Device and method for testing anti-explosion performance of cylindrical structural material |
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| CN202211429901.3A CN115791454A (en) | 2022-11-14 | 2022-11-14 | Device and method for testing anti-explosion performance of cylindrical structural material |
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| CN117630324A (en) * | 2024-01-15 | 2024-03-01 | 成都渝能能源设备有限公司 | Device and method for testing anti-explosion performance of anti-explosion material based on hydrogen explosion |
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| CN117630324A (en) * | 2024-01-15 | 2024-03-01 | 成都渝能能源设备有限公司 | Device and method for testing anti-explosion performance of anti-explosion material based on hydrogen explosion |
| CN117630324B (en) * | 2024-01-15 | 2024-04-19 | 成都渝能能源设备有限公司 | Device and method for testing anti-explosion performance of anti-explosion material based on hydrogen explosion |
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