Industrial digital detonator fragment collecting and kinetic energy testing device
By designing the explosion-proof box and inner box structure, the problem of difficulty in collecting and calculating the kinetic energy of fragments after detonator explosion in the existing technology is solved, and efficient and low-cost fragment collection and kinetic energy testing are achieved.
Patent Information
- Application Number
- CN202422971539.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-12-03
AI Technical Summary
Existing technologies make it difficult to efficiently collect and calculate the kinetic energy of fragments after a detonator explosion, and the testing cost is high and the workload is large.
An industrial digital detonator fragment collection and kinetic energy testing device was designed. It consists of an explosion-proof box and an inner box. The inner box is made of buffer material. The kinetic energy is calculated by measuring the embedding depth and resistance of the fragments in the buffer material.
It achieves efficient collection of fragments after detonator explosion, simplifies operation, reduces testing costs, and can accurately calculate the kinetic energy of the fragments.
Smart Images
Figure CN223361255U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of detonator testing, and in particular relates to an industrial digital detonator fragment collection and kinetic energy testing device. Background Art
[0002] The detonating capacity of a detonator refers to the combined effects of various reactions produced after detonation. This capacity is comprised of three factors: explosion products, fragments, and shock waves. These three energy forms collectively reflect the detonator's detonating capacity, but the magnitude of these three effects varies under different conditions. In direct contact with the explosive, the shock wave is dominant; at a certain distance, fragments are dominant. The explosion products exert a compressive and thermal effect on the object being detonated.
[0003] In explosion physics testing, high-speed photography is used to capture the detonator's explosion process. Subsequent image and video analysis of the explosion process allows calculation of the velocity of the fragments following the detonator explosion. This method offers the advantages of accuracy and intuitiveness, but the testing cost is high and the workload is substantial. Furthermore, while this method can measure fragment velocity, it cannot collect fragments of a specific velocity, and thus cannot calculate the kinetic energy of a fragment of a specific mass. Utility Model Content
[0004] In order to overcome the deficiencies of the prior art and solve the problems existing in the prior art, the utility model provides an industrial digital detonator fragment collection and kinetic energy testing device.
[0005] The utility model is achieved through the following technical solutions.
[0006] The utility model provides an industrial digital detonator fragment collection and kinetic energy testing device, comprising an explosion-proof box with a front opening, an explosion-proof door hinged at the opening of the explosion-proof box, a locking mechanism arranged between the explosion-proof door and the explosion-proof box, a through-hole for the detonator lead to pass through is constructed in the middle of the top surface of the explosion-proof box, an air vent is arranged next to the through-hole, an inner box made of a buffer material for testing the kinetic energy of the detonator is arranged in the explosion-proof box, and a connecting port which can be connected with the through-hole and the air vent is constructed on the top of the inner box.
[0007] As a further improvement of the above-mentioned scheme, the locking mechanism includes a baffle rod rotatably installed on the front side of the explosion-proof door and a fixing part arranged on the side of the explosion-proof box. The upper part of the fixing part is provided with a fixing groove corresponding to the baffle rod. After the baffle rod is rotated, it can be embedded in the fixing groove to close the explosion-proof door and the explosion-proof box.
[0008] As a further improvement of the above solution, a plurality of air leakage holes are constructed on the wall of the air leakage pipe, and an umbrella cap is connected to the upper part of the air leakage pipe for protecting the holes and the air leakage pipe from rain.
[0009] As a further improvement of the above solution, the inner box includes a box body with a single-side opening and a door body for closing the box body opening.
[0010] As a further improvement of the above solution, the outer end of the side wall of the box opening is constructed with an auxiliary pulling groove for pulling the box out of the explosion-proof box, and the front side of the door body is provided with an auxiliary pulling ring for pulling the door body out of the explosion-proof box.
[0011] As a further improvement of the above-mentioned solution, the inner box is composed of six buffer plates made of buffer material, five of which are respectively adhered to the upper, lower, left, right and rear inner walls of the explosion-proof box, wherein a connecting port is constructed on the buffer plate adhered to the upper side wall of the explosion-proof box, and another buffer plate serves as a door body and together with the remaining five buffer plates constitutes the inner box, and an auxiliary pull ring is provided on the front side of the buffer plate serving as the door body.
[0012] As a further improvement of the above solution, a hanging ring is provided on the top surface of the explosion-proof box.
[0013] As a further improvement of the above solution, a support portion is provided at the bottom of the explosion-proof box.
[0014] As a further improvement of the above solution, the cushioning material is EVA foam.
[0015] As a further improvement of the above solution, a boss is provided on the top surface of the explosion-proof box, the boss is located below the umbrella cap, the air release pipe is provided on the boss, and the perforated upper port is opened on the boss.
[0016] The beneficial effects of the utility model are:
[0017] Compared with the prior art, the present invention can effectively collect all fragments after the explosion of the detonator through the arrangement of the explosion-proof box and the inner box. The arrangement of the perforation and the connecting port can facilitate the lifting of the detonator, so that the detonator is placed in the center of the inner box. The inner box is made of buffer material. During the test, the fragments after the detonator explosion can be embedded in the side wall of the inner box. By measuring the embedding depth of the fragments in the side wall of the inner box and weighing the mass of the fragments, the kinetic energy of the fragments can be calculated in combination with the mechanical properties of the buffer material. The overall structure of the device is simple and reusable, and the operation method is simple, and it can efficiently test the detonation ability of the detonator. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural diagram of the utility model;
[0019] Figure 2 It is a structural diagram of the umbrella cap in the utility model;
[0020] Figure 3 This is a schematic diagram of the internal structure of the explosion-proof box in the utility model;
[0021] Figure 4 This is a schematic structural diagram of the inner box in the utility model;
[0022] Figure 5 This is a structural diagram of the inner box in another embodiment of the present invention;
[0023] Figure 6 It is a structural diagram of the boss in the utility model;
[0024] Figure 7 yes Figure 2 A magnified view of middle A;
[0025] Figure 8 yes Figure 2 Enlarged view of middle B;
[0026] Figure 9 It is a linear variation diagram of the force applied to the EVA foam in the present invention.
[0027] In the figure: explosion-proof box 1, perforation 101, explosion-proof door 2, vent pipe 3, vent hole 301, inner box 4, connecting port 401, barrier rod 5, fixing part 6, fixing groove 601, umbrella cap 7, box body 8, auxiliary pull groove 801, door body 9, auxiliary pull ring 10, hanging ring 11, support part 12, boss 13. DETAILED DESCRIPTION
[0028] In order to further illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments.
[0029] like Figures 1 to 8 As shown, the utility model provides an industrial digital detonator fragment collection and kinetic energy testing device, comprising an explosion-proof box 1 with a front opening, an explosion-proof door 2 hinged at the opening of the explosion-proof box 1, a locking mechanism provided between the explosion-proof door 2 and the explosion-proof box 1, a through-hole 101 for the detonator lead to pass through is constructed in the middle of the top surface of the explosion-proof box 1, an air vent 3 is provided next to the through-hole 101, an inner box 4 made of a buffer material for testing the kinetic energy of the detonator is provided in the explosion-proof box 1, and a connecting port 401 which can be connected with the through-hole 101 and the air vent 3 is constructed on the top of the inner box 4.
[0030] Specifically, the locking mechanism includes a bar 5 rotatably mounted on the front side of the explosion-proof door 2 and a fixing portion 6 provided on the side of the explosion-proof box 1. A fixing groove 601 is formed on the upper portion of the fixing portion 6 corresponding to the bar 5. After the bar 5 is rotated, it can be inserted into the fixing groove 601 to close the explosion-proof door 2 and the explosion-proof box 1. The provision of the locking mechanism facilitates the opening and closing of the explosion-proof door 2 and the explosion-proof box 1 and facilitates the lifting of detonators.
[0031] Specifically, when the detonator is installed, its lead wire can be connected to the external detonation controller from the communication port 401 and the through hole 101 in sequence.
[0032] Furthermore, the upper end of the vent pipe 3 is sealed, and a plurality of vent holes 301 are constructed on the wall of the vent pipe 3. The vent holes 301 on the vent pipe 3 can release the pressure in the box after the explosion.
[0033] Furthermore, the lower end of the detonator has a winding portion, and the air vent 301 is located above the winding portion. The lead of the detonator can be wound around the winding portion, making the detonator hanging more stable and preventing the detonator from shaking.
[0034] Furthermore, the upper part of the vent pipe 3 is connected to an umbrella cap 7 for shielding the perforation 101 and the vent pipe 3 from rain. Through the setting of the umbrella cap 7, the device can also be used outdoors under severe weather conditions such as rain and snow. The umbrella cap 7 includes an umbrella body for shielding and a sleeve that can be sleeved on the upper end of the vent pipe 3, and the sleeve will not block the vent hole 301.
[0035] Furthermore, a boss 13 is provided on the top surface of the explosion-proof box 1, the boss 13 is located below the umbrella cap 7, the air release pipe 3 is provided on the boss 13, and the upper end of the perforation 101 is opened on the boss 13. The setting of the boss 13 can further improve the ability of the device to resist adverse weather conditions.
[0036] Furthermore, the inner box 4 includes a box body 8 with a single-side opening and a door body 9 for closing the opening of the box body 8. The opening of the inner box 4 is on the same side as the opening of the explosion-proof box 1 to facilitate the fixation and installation of the detonator. The side walls of the box body 8 are fitted with the side walls of the explosion-proof box 1 on the corresponding side, and the door body 9 can be fitted with the inner side surface of the explosion-proof door 2 after closing.
[0037] Furthermore, the outer end of the side wall of the box body 8 opening is constructed with an auxiliary groove 801 for pulling the box body 8 out of the explosion-proof box 1. Since the side wall of the box body 8 fits closely with the side wall of the explosion-proof box 1, the auxiliary groove 801 is provided to facilitate pulling the box body 8 out. The depth of the auxiliary groove 801 can be set according to actual needs.
[0038] Furthermore, an auxiliary pull ring 10 is provided on the front side of the door body 9 for pulling the door body 9 out of the explosion-proof box 1. The side of the door body 9 fits closely with the side wall of the explosion-proof box 1. The auxiliary pull ring 10 is provided to facilitate pulling the door body 9 out.
[0039] Furthermore, the difference between the present embodiment and the above-mentioned embodiment in which the inner box 4 is composed of an integral box body 8 and a door body 9 is that, in order to facilitate data collection, the inner box 4 in the present embodiment is composed of six buffer plates made of buffer material, wherein five buffer plates are respectively fitted with the upper, lower, left, right and rear inner walls of the explosion-proof box 1, wherein a connecting port 401 is constructed on the buffer plate fitted with the upper side wall of the explosion-proof box 1, and another buffer plate serves as the door body 9 and together with the remaining five buffer plates constitute the inner box 4, and an auxiliary pull ring 10 is provided on the front side of the buffer plate serving as the door body 9, and an auxiliary pull groove 801 can be provided on the outer end of the buffer plate fitted with the side wall of the explosion-proof box 1.
[0040] Furthermore, a lifting ring 11 is provided on the top surface of the explosion-proof box 1 to facilitate the lifting and movement of the explosion-proof box 1 .
[0041] Furthermore, a support portion 12 is provided at the bottom of the explosion-proof box 1 , and the explosion-proof box 1 has a certain height to facilitate operation by testers.
[0042] Furthermore, the cushioning material is EVA foam cotton, which has low cost and excellent mechanical properties.
[0043] Specifically, in the test, when the detonator exploded, the shock wave generated caused the fragments to tear through the EVA foam and penetrate into the foam, where they were stopped by the resistance of the foam, and the resistance of the foam can be calculated using its tear strength.
[0044] In this embodiment, the VA content of the selected EVA foam material is less than 40%, the Shore C hardness is 38 degrees, and the tear strength is 24N / cm. Since the force on the foam during the process of the fragment piercing the foam is variable, but the change is linear, the image method can be used to calculate the work done by the variable force. According to the tear strength, an image can be made, such as Figure 9 As shown in Figure 1. Where s is the length of the fragment trajectory, and the area of the triangle formed by it and the straight line is the work done by the variable force.
[0045] By measuring the depth of the fragments penetrating the foam, the speed of the fragments before penetrating the foam can be calculated. The formula is as follows:
[0046]
[0047] Where, W is the work done by the foam resistance;
[0048] m - the mass of the fragment;
[0049] v1 – the speed of the fragment before it penetrates the foam.
[0050] After the detonator explodes, the fragments fly in front of the EVA foam in a very short time. Because their flight time is short and their distance is limited, the fragment trajectory can be considered a straight line. Furthermore, during their flight, the fragments are primarily affected by air resistance, and the effect of gravity on the fragments is negligible. The differential equation for fragment motion is as follows:
[0051]
[0052] Where, m is the mass of the fragment;
[0053] C——drag coefficient;
[0054] ρ——air density;
[0055] S——windward area of fragments;
[0056] t——fragment flight time;
[0057] V - the relative speed between fragments and air.
[0058] Integrating the above formula yields the following formula:
[0059]
[0060] Where, x is the distance between the fragment's position before penetration and the detonator;
[0061] v0——initial velocity of fragments;
[0062] v(x)——fragment velocity corresponding to distance x;
[0063] ɑ——Velocity attenuation coefficient.
[0064] Natural fragments tumble continuously during flight, and the frontal area is a random variable, which can be calculated using the following formula:
[0065]
[0066] Where, ——Fragment shape coefficient, natural fragments take
[0067] m——fragment mass.
[0068] After the detonator explodes, the scattered fragments acquire initial kinetic energy and velocity. As they reach the foam, they are affected by air resistance, which reduces their initial kinetic energy. Subsequently, with the remaining kinetic energy, they penetrate the EVA foam, where they experience resistance until they stop, reducing their kinetic energy to zero. This test measures the depth of penetration of the fragments into the foam to calculate their velocity before reaching the foam. The initial velocity and kinetic energy at the time of explosion are then inferred using the following formula.
[0069] E=12MV 2
[0070] Where, E is the kinetic energy of the fragments;
[0071] M - fragment mass;
[0072] V - fragment velocity.
[0073] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that come within the meaning and range of equivalents of the claims be included in the present invention.
[0074] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
Claims
1. An industrial digital detonator fragment collection and kinetic energy testing device, characterized by: The invention comprises an explosion-proof box (1) with a front opening, an explosion-proof door (2) hingedly connected to the opening of the explosion-proof box (1), a locking mechanism arranged between the explosion-proof door (2) and the explosion-proof box (1), a through-hole (101) for a detonator lead to pass through is arranged in the middle of the top surface of the explosion-proof box (1), an air release pipe (3) is arranged next to the through-hole (101), an inner box (4) made of a buffer material for testing the kinetic energy of the detonator is arranged in the explosion-proof box (1), and a communication port (401) that can communicate with the through-hole (101) and the air release pipe (3) is arranged on the top of the inner box (4).
2. The industrial digital detonator fragment collection and kinetic energy testing device according to claim 1, characterized in that: The locking mechanism comprises a blocking rod (5) rotatably mounted on the front side of the explosion-proof door (2) and a fixing portion (6) arranged on the side of the explosion-proof box (1); a fixing groove (601) is constructed on the upper portion of the fixing portion (6) corresponding to the blocking rod (5); and the blocking rod (5) can be inserted into the fixing groove (601) after rotation to close the explosion-proof door (2) and the explosion-proof box (1).
3. The industrial digital detonator fragment collection and kinetic energy testing device according to claim 1, characterized in that: A plurality of air leakage holes (301) are constructed on the wall of the air leakage pipe (3), and an umbrella cap (7) for shielding the perforations (101) and the air leakage pipe (3) from rain is connected to the upper part of the air leakage pipe (3).
4. The industrial digital detonator fragment collection and kinetic energy testing device according to claim 1, characterized in that: The inner box (4) comprises a box body (8) with a single-side opening and a door body (9) for closing the opening of the box body (8).
5. The industrial digital detonator fragment collection and kinetic energy testing device according to claim 4, characterized in that: The outer end of the side wall of the box body (8) opening is configured with an auxiliary pull groove (801) for pulling the box body (8) out of the explosion-proof box (1), and the front side of the door body (9) is provided with an auxiliary pull ring (10) for pulling the door body (9) out of the explosion-proof box (1).
6. The industrial digital detonator fragment collection and kinetic energy testing device according to claim 4, characterized in that: The inner box (4) is composed of six buffer plates made of buffer material, wherein five of the buffer plates are respectively attached to the upper, lower, left, right and rear inner side walls of the explosion-proof box (1), wherein a connecting port (401) is constructed on the buffer plate attached to the upper side wall of the explosion-proof box (1), and another buffer plate serves as a door body (9) and together with the remaining five buffer plates constitutes the inner box (4), and an auxiliary pull ring (10) is provided on the front side of the buffer plate serving as the door body (9).
7. The industrial digital detonator fragment collection and kinetic energy testing device according to claim 1, characterized in that: The top surface of the explosion-proof box (1) is provided with a hanging ring (11).
8. The industrial digital detonator fragment collection and kinetic energy testing device according to claim 1, characterized in that: A supporting portion (12) is provided at the bottom of the explosion-proof box (1).
9. The industrial digital detonator fragment collection and kinetic energy testing device according to claim 1, characterized in that: The cushioning material is EVA foam.
10. The industrial digital detonator fragment collection and kinetic energy testing device according to claim 3, characterized in that: The top surface of the explosion-proof box (1) is provided with a boss (13), the boss (13) is located below the umbrella cap (7), the air release pipe (3) is provided on the boss (13), and the upper end of the through hole (101) is opened on the boss (13).