A test protection device and test method for detonators under high temperature conditions

Abstract

This disclosure relates to a protective device and method for testing detonators under high-temperature conditions. The protective device includes a protective cylinder and a detonating cylinder. The protective cylinder includes at least one first cylinder body and / or at least one second cylinder body. The protective cylinder is located inside the detonating cylinder, and a fixing mechanism for securing the protective cylinder is installed inside the detonating cylinder. A compensation mechanism is connected to the top of the protective cylinder to ensure that the tops of any two first cylinder bodies and / or second cylinder bodies are not on the same horizontal plane. This addresses the problems of previous detonator tests, which required heating the detonator in an explosion-proof oven before transferring it to a protective container for testing. The transfer process posed safety hazards, and the results of testing after the detonator cooled down were not accurate enough. Existing integrated testing devices did not consider high-temperature and confined space sympathetic detonation and output capability testing, leading to test failures and inaccurate results.

Description

Technical Field

[0001] This disclosure relates to the field of well logging technology, and in particular to a test protection device and test method for detonators under high temperature conditions. Background Technology

[0002] Currently, the testing of electric detonators used in oilfields follows SY / T 6273-2016 "Testing Methods for Electric Detonators for Oil and Gas Wells". The detonator heating test is conducted in an explosion-proof oven. After heating to a predetermined temperature and maintaining that temperature, the detonator is cooled to room temperature, removed, and transferred to a protective container for resistance and output capability testing. The heating test requires 13 detonators, while the output capability test requires 2 detonators, along with matching detonating cord and ignition testing procedures. The disadvantages of this method are that manually handling the heated detonators poses safety hazards, and transferring them to the protective container increases the safety risks for operators. Furthermore, the test results after the detonators have cooled to room temperature differ from those obtained at high temperatures, making the test results less accurate. A new type of electric detonator testing and ignition device (CN211576001U) describes measurement and ignition tests conducted at room temperature in an explosion-proof container, but it does not consider the issues of high temperature, confined space explosion prevention, or output capability testing. Summary of the Invention

[0003] This disclosure proposes a protective device and test method for testing detonators under high-temperature conditions, in order to solve the problems of the previous detonator testing, which required heating the detonator in an explosion-proof oven and then transferring it to a protective container for testing. The transfer process posed safety hazards, and the test results were not accurate enough after the detonator was cooled down. The existing integrated testing device did not consider the high temperature and confined space sympathetic explosion and output capability testing, which led to test failure and inaccurate test results.

[0004] According to one aspect of this disclosure, a test protection device for detonators under high temperature conditions is provided, comprising: a protective cylinder and a detonating cylinder;

[0005] The protective cylinder includes at least one first cylinder and / or at least one second cylinder, wherein the first cylinder is used to house a detonator, and the second cylinder is used to house a detonator and a detonating cord.

[0006] The protective cylinder is located inside the detonating cylinder, and a fixing mechanism for fixing the protective cylinder is installed inside the detonating cylinder;

[0007] The top of the protective cylinder is connected to a compensation mechanism, which is used to ensure that the tops of any two of the first cylinders and / or the second cylinders are not on the same horizontal plane.

[0008] The compensation mechanism has a through hole for the lead wire of the detonator to pass through.

[0009] Preferably, the bodies of the first cylinder and the second cylinder are tubular;

[0010] The bottom of the first cylinder and the second cylinder are respectively equipped with a collection net, which is used to prevent explosive debris of the detonator and / or detonating cord inside the first cylinder and / or the second cylinder from falling out of the cylinder.

[0011] Preferably, the detonator has a slot on its side wall, and a protective mesh is installed inside the slot.

[0012] Preferably, the fixing mechanism includes: a fixing plate and a frame;

[0013] The outer wall of the frame is fixed to the inner wall of the detonator, and the outer wall of the fixing plate is connected to the inner wall of the frame by a threaded structure.

[0014] The fixed plate has several positioning holes, the diameter of which matches the diameter of the protective cylinder.

[0015] Preferably, the compensation mechanism includes: a compensator;

[0016] The compensator has external threads on its sidewall, and the top of the protective cylinder has internal threads that match the external threads.

[0017] The compensator is used to compensate for the height of the protective cylinder.

[0018] According to one aspect of this disclosure, a method for testing detonators under high-temperature conditions is provided, comprising the steps of:

[0019] The detonator to be tested is placed inside the first cylinder of the protective cylinder of the test protective device under high temperature conditions, and / or the detonator to be tested and its connected detonating cord are placed inside the second cylinder of the protective cylinder.

[0020] The first cylinder and / or the second cylinder are placed inside the detonator and secured by a fixing mechanism;

[0021] By connecting the compensation mechanism to the top of the first cylinder and / or the second cylinder, the tops of any two of the first cylinders and / or the second cylinders are not on the same horizontal plane;

[0022] The detonator is placed in the test heating device, and the detonators in the first cylinder and / or the second cylinder are connected to the measuring instrument. The detonator is heated to a predetermined temperature and kept at that temperature for a predetermined time.

[0023] During the heating process or after the predetermined time, resistance is measured by a measuring instrument during the resistance measurement test, and / or the detonator in the first cylinder is detonated during the detonator ignition test, and / or the detonator in the second cylinder is detonated during the detonator output capability test.

[0024] Preferably, it further includes: while the tops of any two first cylinders and / or second cylinders are not on the same horizontal plane, the height difference between the tops of any two adjacent first cylinders and / or second cylinders is greater than or equal to a predetermined height difference.

[0025] This disclosure has the following beneficial effects:

[0026] This disclosure provides a protective device and method for testing detonators under high-temperature conditions. By setting up a protective cylinder, multiple detonators can be tested within a single detonating cylinder. By setting up a compensation mechanism, sufficient safe distances are maintained between detonators in multiple cylinders to prevent sympathetic detonation. This disclosure eliminates the need to transfer detonators between ignition and heating devices during testing, thereby preventing the risk of explosion during the transfer process. It also prevents the temperature of the detonators from dropping after being transferred, allowing the tests to be conducted under high-temperature conditions, thus making the test results more accurate. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the specification, serve to illustrate the technical solutions of this disclosure.

[0028] Figure 1 A schematic diagram of a test apparatus for detonators under high-temperature conditions according to an embodiment of the present disclosure is shown.

[0029] Figure 2 A schematic diagram of the fixing mechanism according to an embodiment of the present disclosure is shown.

[0030] In the diagram: 1-Detonating tube, 2-First tube body, 3-Second tube body, 4-Collection net, 5-Protective net, 6-Fixing plate, 7-Frame, 8-Positioning hole, 9-Compensator, 10-Detonator, 11-Detonating cord, 12-Leading wire, 13-Inner tube body. Detailed Implementation

[0031] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0032] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0033] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0034] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0035] Figure 1 A schematic diagram of a test protection device for detonators under high-temperature conditions according to an embodiment of the present disclosure is shown. Figure 2 A schematic diagram of the fixing mechanism according to an embodiment of this disclosure is shown. Figure 1 , 2 As shown, the protective device for testing detonators under high-temperature conditions includes: a protective cylinder and a detonating cylinder 1; the protective cylinder includes at least one first cylinder 2 and / or at least one second cylinder 3, the first cylinder 2 is used to place the detonator 10 inside, and the second cylinder 3 is used to place the detonator 10 and the detonating cord 11 inside; the protective cylinder is located inside the detonating cylinder 1, and a fixing mechanism for fixing the protective cylinder is installed inside the detonating cylinder 1; a compensation mechanism is connected to the top of the protective cylinder, and the compensation mechanism is used to ensure that the tops of any two first cylinders 2 and / or second cylinders 3 are not on the same horizontal plane; the compensation mechanism has a through hole for the lead wire 12 of the detonator 10 to pass through.

[0036] In this embodiment of the disclosure, when conducting resistance measurement, ignition, and output capability tests on the detonator 10, the detonator 10 sample to be tested for resistance measurement and ignition is placed inside the first cylinder 2, and the lead wire 12 of the detonator 10 passes through the top opening of the first cylinder 2; when conducting the output capability test on the detonator 10, the sample with the detonating cord 11 connected to the detonator 10 is placed inside the second cylinder 3, with the detonator 10 positioned above the detonating cord 11, and the lead wire 12 of the detonator 10 passing through the top opening of the second cylinder 3.

[0037] The first cylinder 2 and the second cylinder 3 are fixed inside the detonating tube 1 by a fixing mechanism, and the first cylinder 2 and the second cylinder 3 are in a vertical state inside the detonating tube 1. A compensation mechanism is fixed to the top of the first cylinder 2 and / or the second cylinder 3, so that the tops of any two first cylinder 2 and / or second cylinder 3 are not on the same horizontal plane. The compensation mechanism has a through hole, through which the lead wire 12 is passed to connect the measuring instrument and / or the detonator.

[0038] After all the first cylinders 2 and the second cylinders 3 are installed inside the detonating cylinder 1 by a fixing mechanism, the detonating cylinder 1 is heated to the predetermined test temperature by a heating device, and then kept at that temperature for a predetermined time. If a resistance measurement test is to be conducted, the resistance of the detonator 10 is measured by a measuring instrument during the heating process or after the heat preservation, thereby obtaining the measurement result. If a detonator 10 ignition test is to be conducted, the detonator outputs a specified ignition stimulus, which is transmitted to the detonator 10 in the first cylinder 2 through the lead wire 12, and the detonator 10 ignites, completing the ignition test. If a detonator 10 output capability test is to be conducted, the detonator outputs a specified ignition stimulus, which is transmitted to the detonator 10 in the second cylinder 3 through the lead wire 12, and the detonator 10 ignites, simultaneously detonating the detonating cord 11 connected to the detonator 10, thus completing the output capability test. During the ignition and output capability test of detonator 10, if the tops of several first cylinders 2 and / or second cylinders 3 are at the same horizontal level, the shock wave generated at the top opening of the cylinder when detonator 10 detonates may cause detonators 10 at the same height to detonate sympathetically, leading to test failure. Adjusting the top height of the first cylinders 2 and / or second cylinders 3 through a compensation mechanism reduces the impact of a detonator 10 exploding in one cylinder on detonators 10 in surrounding cylinders.

[0039] In this disclosure, the body of the first cylinder 2 and the body of the second cylinder 3 are tubular; a collection net 4 is installed at the bottom of the first cylinder 2 and the second cylinder 3 respectively, and the collection net 4 is used to prevent the explosive debris of the detonator 10 and / or detonating cord 11 inside the first cylinder 2 and / or the second cylinder 3 from falling out of the cylinder.

[0040] In this embodiment, when the detonator 10 in the first cylinder 2 and / or the second cylinder 3 is detonated, the debris from the explosion of the detonator 10 and the detonating cord 11 will not fall out of the cylinder due to the obstruction of the collecting net 4 at the bottom of the first cylinder 2 and the second cylinder 3, so that it can be used for subsequent analysis / operation; and when the inside of the detonating cylinder 1 is heated, the hot air inside the detonating cylinder 1 will enter the inside of the first cylinder 2 and / or the second cylinder 3 through the protective net 5, so that the detonator 10 in the first cylinder 2 and / or the detonator 10, detonating cord 11 and other test items in the second cylinder 3 are heated uniformly.

[0041] Inside the first cylinder 2 and the second cylinder 3, there is an inner cylinder 13. The height of the inner cylinder 13 is less than the height of the first cylinder 2 and the second cylinder 3. The diameter of the inner cylinder 13 matches the diameter of the detonator 10 body. The diameter of the detonator 10 head, located at the top of the detonator 10 body, is larger than the diameter of the detonator 10 body. When the detonator 10 is inserted into the first cylinder 2 and / or the second cylinder 3, after the detonator 10 body enters the inner cylinder 13, the detonator 10 head is locked above the inner cylinder 13, thus fixing the position of the detonator 10 within the first cylinder 2 and the second cylinder 3 and preventing it from falling downwards. Simultaneously, the inner cylinder 13 increases the thickness of the protective cylinder, allowing it to better withstand the explosive impact of the detonator 10. The first cylinder 2, the second cylinder 3, and the inner cylinder 13 can be made of metal or composite metal materials, etc.; the collecting net 4 is a metal mesh.

[0042] In this disclosure, the detonator 1 has a groove on its side wall, and a protective net 5 is installed inside the groove.

[0043] In this embodiment of the present disclosure, when the detonator 1 is heated, the heating device is usually located outside the detonator 1. When the heating device is heating, hot air can enter the interior of the detonator 1 through the protective net 5 on the side wall of the detonator 1, thereby enabling the interior of the detonator 1 to heat up more quickly. At the same time, when the detonator 10 inside the detonator 1 explodes, the protective net 5 on the side wall of the detonator 1 can absorb the shock wave generated by the explosion.

[0044] In this disclosure, the fixing mechanism includes: a fixing plate 6 and a frame 7; the outer side wall of the frame 7 is fixed to the inner side wall of the detonating cylinder 1, and the outer side wall of the fixing plate 6 and the inner side wall of the frame 7 are connected by a threaded structure; the fixing plate 6 has a plurality of positioning holes 8, and the diameter of the positioning holes 8 matches the diameter of the protective cylinder.

[0045] In this embodiment, the fixed disk 6 is circular; the frame 7 has an annular body that matches the shape of the inner wall of the detonating cylinder 1; the diameter of the positioning hole 8 on the fixed disk 6 matches the diameter of the first cylinder 2 and the second cylinder 3. The outer circumference of the frame 7 is connected and fixed to the inner wall of the detonating cylinder 1. During testing, the fixed disk 6 is placed inside the detonating cylinder 1, and the outer circumference of the fixed disk 6 is connected to the inner wall of the frame 7 through a threaded structure; the first cylinder 2 and / or the second cylinder 3 are inserted into the positioning hole 8 on the fixed disk 6, thereby keeping the first cylinder 2 and the second cylinder 3 in a vertical position. If the height of the first cylinder 2 or the second cylinder 3 is less than the distance between the frame 7 and the bottom of the detonating cylinder 1, causing the top of the first cylinder 2 or the second cylinder 3 to be a certain distance from the fixing plate 6 after being inserted into the positioning hole 8, thus preventing the protective cylinder from being fixed, then a compensator 9 is connected to the first cylinder 2 or the second cylinder 3 to increase the overall height of the first cylinder 2 or the second cylinder 3, making it exceed the height position of the fixing plate 6 and the frame 7 inside the detonating cylinder 1, thereby fixing the first cylinder 2 and the second cylinder 3. The fixing plate 6 and the frame 7, connected by a threaded structure, make installation and disassembly easier, and the fixing plate 6 is more stable inside the detonating cylinder 1.

[0046] In this disclosure, the compensation mechanism includes: a compensator 9; the compensator 9 has an external thread on its side wall, and the top end of the protective cylinder has an internal thread that matches the external thread; the compensator 9 is used to compensate for the height of the protective cylinder.

[0047] In this embodiment, the compensator 9 has a cylindrical body with external threads on its sidewall near the bottom. The inner sidewalls of the first cylinder 2 and the second cylinder 3 near their tops have internal threads that match the external threads of the compensator 9. During connection, the tops of the first cylinder 2 and / or the second cylinder 3 are connected to the bottom of the compensator 9 via threaded connections, thereby increasing the overall height of the first cylinder 2 and the second cylinder 3. A through hole is provided on the compensator 9, with both ends of the through hole aligned with the directions of both ends of the compensator 9, for the passage of the detonator 10 lead wire 12. The height of the compensator 9 can be set to various specifications. Alternatively, an internal thread matching the external threads of the compensator 9 can be provided on the inner sidewall near the top, allowing the tops and bottoms of the two compensators 9 to be connected via a threaded structure. When the height of the top of the first cylinder 2 and / or the second cylinder 3 after connecting one compensator 9 is insufficient to create a height difference between it and the tops of other first cylinder 2 and / or second cylinder 3, the height can be adjusted by axially connecting multiple compensators 9.

[0048] This disclosure also provides a method for testing detonators under high-temperature conditions, comprising the following steps: Step S01: placing the detonator to be tested inside the first cylinder of the protective cylinder of the detonator high-temperature testing protective device, and / or placing the detonator to be tested and its connected detonating cord inside the second cylinder of the protective cylinder; Step S02: placing the first cylinder 2 and / or the second cylinder 3 inside the detonating tube 1 and fixing it by a fixing mechanism; Step S03: connecting a compensation mechanism to the top of the first cylinder 2 and / or the second cylinder 3 so that the tops of any two of the first cylinder 2 and / or the second cylinder 3 are not on the same horizontal plane. Step S04: Place the detonating tube 1 into the test heating device, connect the detonator in the first tube and / or the second tube to the measuring instrument, heat the detonating tube 1 to a predetermined temperature, and keep the detonating tube 1 at that temperature for a predetermined time; Step S05: During the heating process or after keeping the temperature at that time, when conducting a resistance measurement test, the resistance is measured by the measuring instrument, and / or, when conducting a detonator 10 ignition test, the detonator 10 in the first tube 2 is detonated, and / or, when conducting a detonator 10 output capability test, the detonator 10 in the second tube 3 is detonated. This solves the problem that in the past, when conducting a heating test on the detonator 10, it was necessary to heat it in an explosion-proof oven and then transfer it to a protective container for testing. This process posed safety hazards, and the results of testing the detonator 10 after it cooled down were not accurate enough. The existing integrated testing device did not consider high temperature and confined space sympathetic detonation and output capability testing, leading to test failures and inaccurate test results.

[0049] This invention provides a test method for detonators under high-temperature conditions, specifically including the following steps:

[0050] Step S01: Place the detonator to be tested inside the first cylinder of the protective cylinder of the test protective device for detonator under high temperature conditions, and / or place the detonator to be tested and its connected detonating cord inside the second cylinder of the protective cylinder.

[0051] In this embodiment of the present disclosure, during the test, the detonator 10 sample to be tested is placed inside the first cylinder 2, and / or, the detonator 10 connected to the detonating cord 11 sample is placed inside the second cylinder 3, with the detonator 10 positioned above the detonating cord 11; the lead wire 12 of the detonator 10 is passed through the top opening of the first cylinder 2. The body of the detonator 10 is inserted into the inner cylinder 13, and the head of the detonator 10 is secured above the inner cylinder 13, thereby fixing the position of the detonator 10 and / or the detonating cord 11 and preventing it from falling to the bottom of the cylinder.

[0052] Step S02: Place the first cylinder 2 and / or the second cylinder 3 into the detonator 1 and secure them using the fixing mechanism.

[0053] In this embodiment, the fixing plate 6 is connected to the frame 7 inside the detonating tube 1 via a threaded connection; several first cylinders 2 and / or second cylinders 3 are inserted into the positioning holes 8 on the fixing plate 6, with the first cylinders 2 and second cylinders 3 remaining vertical. If the top of the first cylinder 2 and / or second cylinder 3 is lower than the height of the frame 7 inside the detonating tube 1, a compensator 9 is connected to the top of the first cylinder 2 or second cylinder 3 to increase the overall height of the first cylinder 2 or second cylinder 3.

[0054] Step S03: By connecting the compensation mechanism to the top of the first cylinder 2 and / or the second cylinder 3, the tops of any two of the first cylinder 2 and / or the second cylinder 3 are not on the same horizontal plane.

[0055] This disclosure further includes: at the same time that the tops of any two first cylinders 2 and / or second cylinders 3 are not on the same horizontal plane, the height difference between the tops of any two adjacent first cylinders 2 and / or second cylinders 3 is greater than or equal to a predetermined height difference.

[0056] In this embodiment, if the tops of any two first cylinders 2 and / or second cylinders 3 placed inside the detonating cylinder 1 are at the same horizontal level, and the height difference between the tops of any two first cylinders 2 and / or second cylinders 3 is less than a predetermined height difference, then a compensator 9 of appropriate height is selected and its bottom end is connected to the top of the first cylinder 2 and / or second cylinder 3. This ensures that the height difference between the tops of any two first cylinders 2 and / or second cylinders 3 is greater than or equal to the predetermined height difference, preventing sympathetic detonations of detonators 10 in surrounding cylinders when a detonator 10 in one cylinder explodes. The predetermined height difference is the length of one detonator 10, meaning the height difference between two adjacent first cylinders 2 and / or second cylinders 3 is the length of one detonator 10. If the predetermined height difference is less than the length of one detonator 10, sympathetic detonation is still possible.

[0057] Step S04: Place the detonating tube 1 into the test heating device, connect the detonator in the first tube and / or the second tube to the measuring instrument, heat the detonating tube 1 to a predetermined temperature, and keep the detonating tube 1 at that temperature for a predetermined time.

[0058] In this embodiment, a heating device is activated to heat the detonating cylinder 1. Hot air surrounding the detonating cylinder 1 enters the cylinder 1 through the protective net 5 on its side wall. After the air temperature inside the detonating cylinder 1 rises, it enters the cylinder interior through the collecting net 4 at the bottom of the first cylinder 2 and / or the second cylinder 3, thereby uniformly heating the detonator 10 and / or detonating cord 11 inside. A thermometer is installed inside the detonating cylinder 1. When the temperature inside the detonating cylinder 1 reaches a predetermined temperature, the cylinder 1 is kept at that temperature for a predetermined time to ensure that the detonator 10 inside the first cylinder 2 and / or the second cylinder 3 is sufficiently heated to the predetermined temperature. The predetermined temperature is 180 degrees Celsius, and the predetermined time is two hours, which can be specifically set according to experimental needs.

[0059] Step S05: During the heating process or after the heat preservation time, when conducting the resistance measurement test, the resistance is measured by a measuring instrument, and / or, when conducting the detonator 10 ignition test, the detonator 10 in the first cylinder 2 is detonated, and / or, when conducting the detonator 10 output capability test, the detonator 10 in the second cylinder 3 is detonated.

[0060] In this embodiment of the present disclosure, after the heat preservation reaches the predetermined time, it is observed that the detonator 10 inside the detonating tube 1 does not ignite. If the detonator 10 ignites and explodes during the heating or heat preservation process, it indicates that the high temperature resistance of the detonator 10 is unqualified and subsequent tests cannot be carried out.

[0061] If a resistance measurement test of detonator 10 under high temperature conditions is to be carried out, the resistance of detonator 10 during the heating process or after heat preservation is measured by a measuring instrument to obtain the measurement result.

[0062] If a detonator 10 ignition test is to be conducted, the specified ignition stimulus is output through the detonator and transmitted to the detonator 10 inside the first cylinder 2 via the lead wire 12. If the detonator 10 is detonated, it is considered qualified and the ignition test is completed.

[0063] If a detonator 10 output capability test is to be conducted, a specified ignition stimulus is output through the detonator, which is transmitted to the detonator 10 inside the second cylinder 3 via the lead wire 12. When the detonator 10 inside the second cylinder 3 ignites, it simultaneously detonates the connected detonating cord 11. If the detonating cord 11 explodes completely, it is considered qualified, and the output capability test is completed.

[0064] This disclosure, through the design of a protective casing, enables multiple detonators to achieve optimal testing results in a minimal space; it fully utilizes vertical space, maintaining a safe distance between detonators within the limited space of the detonating tube to prevent sympathetic detonation; and it allows for simultaneous detonator extreme temperature tests, resistance measurements, ignition tests, and detonating cord output capability tests within the detonating tube, enabling multiple tests to be completed in the same space without the need for intermediate transfer operations. This disclosure has advantages such as simple structure, low cost, convenient operation, and high reliability.

[0065] It is understood that the various method embodiments mentioned above in this disclosure can be combined with each other to form combined embodiments without violating the principle and logic. Due to space limitations, this disclosure will not elaborate further.

[0066] Those skilled in the art will understand that, in the above-described method of the specific implementation, the order in which each step is written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0067] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technical improvements to the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A test method for detonators under high-temperature conditions, characterized in that, Including the following steps: The detonator to be tested is placed inside the first cylinder of the protective cylinder of the test protective device under high temperature conditions, and / or the detonator to be tested and its connected detonating cord are placed inside the second cylinder of the protective cylinder. The first cylinder and / or the second cylinder are placed inside the detonator and secured by a fixing mechanism; By connecting the compensation mechanism to the top of the first cylinder and / or the second cylinder, the tops of any two of the first cylinders and / or the second cylinders are not on the same horizontal plane; The detonator is placed in the test heating device, and the detonators in the first cylinder and / or the second cylinder are connected to the measuring instrument. The detonator is heated to a predetermined temperature and kept at that temperature for a predetermined time. During the heating process or after the heat is maintained for the predetermined time, resistance is measured by measuring instruments during the resistance measurement test, and / or the detonator in the first cylinder is detonated during the detonator ignition test, and / or the detonator in the second cylinder is detonated during the detonator output capability test. The protective device for testing detonators under high temperature conditions includes: a protective cylinder and a detonating cylinder (1); the protective cylinder includes at least one first cylinder (2) and / or at least one second cylinder (3), the first cylinder (2) is used to place the detonator (10), and the second cylinder (3) is used to place the detonator (10) and the detonating cord (11); the protective cylinder is located inside the detonating cylinder (1), and a fixing mechanism for fixing the protective cylinder is installed inside the detonating cylinder (1); the top of the protective cylinder is connected to a compensation mechanism, which is used to ensure that the tops of any two first cylinders (2) and / or second cylinders (3) are not on the same horizontal plane; the compensation mechanism has a through hole for the lead wire (12) of the detonator (10) to pass through.

2. The test method for detonators under high-temperature conditions according to claim 1, characterized in that, Also includes: While the tops of any two first cylinders and / or second cylinders are not on the same horizontal plane, the height difference between the tops of any two adjacent first cylinders and / or second cylinders is greater than or equal to a predetermined height difference.

3. The test method for detonators under high-temperature conditions according to claim 1, characterized in that: The body of the first cylinder (2) and the body of the second cylinder (3) are tubular; The bottom of the first cylinder (2) and the second cylinder (3) are respectively equipped with a collection net (4), which is used to prevent the explosive debris of the detonator (10) and / or detonating cord (11) in the first cylinder (2) and / or the second cylinder (3) from falling out of the cylinder.

4. The test method for detonators under high-temperature conditions according to claim 1, characterized in that: The detonator (1) has a slot on its side wall, and a protective net (5) is installed inside the slot.

5. The test method for detonators under high-temperature conditions according to claim 1, characterized in that, The fixing mechanism includes: a fixing plate (6) and a frame (7); The outer wall of the frame (7) is fixed to the inner wall of the detonator (1), and the outer wall of the fixing plate (6) is connected to the inner wall of the frame (7) by a threaded structure. The fixed plate (6) has a plurality of positioning holes (8), the diameter of which matches the diameter of the protective cylinder.

6. The test method for detonators under high-temperature conditions according to claim 1, characterized in that, The compensation mechanism includes: a compensator (9); The compensator (9) has an external thread on its side wall, and the top of the protective cylinder has an internal thread that matches the external thread. The compensator (9) is used to compensate for the height of the protective cylinder.

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