Inner and outer step type large inner tube initiating explosive-free electronic detonator

Abstract

The utility model relates to the technical field of coal mine allowable electronic detonators, and discloses an inner and outer step type large inner tube primary explosive-free electronic detonator, a detonator shell comprises an upper shell and a lower shell, the top of the upper shell is sealed through a plastic plug, the upper shell and the lower shell are integrally connected through an inner step and an outer step, and the outer diameter of the upper shell is larger than that of the lower shell. The inner diameter of the upper tube shell is larger than that of the lower tube shell; the lower tube shell is filled with two-time main explosives, the upper portions of the main explosives are filled with buffering materials, the upper surfaces of the buffering materials are flush with the lower edges of the inner step and the outer step, a large inner tube installed in the upper tube shell abuts against the inner step and the outer step, the large inner tube is filled with four-time explosives, and the top of the four-time explosives is provided with a fire penetrating cap arranged in the large inner tube. A detonating assembly is clamped above the fire penetrating cap, and a leg wire of the detonating assembly penetrates through the plastic plug. According to the device, the large inner tube is used for improving the constraining force of the electronic detonator, and ignition powder is omitted, so that the safety of the electronic detonator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic detonators permitted for coal mines, in particular to the technical field of detonator safety, and specifically is an electronic detonator with inner and outer stepped large inner tube and no explosive. Background Art

[0002] Most existing electronic detonators use electronic ignition design, using an ignition head (such as bridge wire) to burn and ignite through the ignition powder coated on the surface. Different ignition powders have different burning sensitivities and ignition rates, which will also affect the reliability and output energy of the detonator. Compared with detonators with explosives, electronic detonators without explosives have greatly improved their safety, but there are still certain safety hazards in the process of transportation and use due to impact and high temperature.

[0003] Not only that, during use, the ignition powder in the ignition head explodes, and the ignition powder after the explosion produces high-temperature and high-pressure gas with a certain energy. Due to the insufficient restraint force of the electronic detonator shell, the high-temperature and high-pressure gas breaks through the detonator shell, and cannot continue to detonate the main explosive downward, that is, all the explosives in the lower part cannot be detonated, resulting in a half explosion, and the detonator cannot be completely exploded, affecting safe detonation. Summary of the invention

[0004] In order to solve a series of problems such as the ignition powder coated on the ignition head of the electronic detonator is easily affected by the environment and becomes unstable, and at the same time, during the use of the electronic detonator, the insufficient restraint force of the detonator shell easily leads to half-explosion of the detonator and failure to detonate the main explosive below, causing hidden dangers and affecting safe detonation, the utility model provides an inner and outer stepped large inner tube electronic detonator without explosive.

[0005] The utility model is realized by the following technologies: comprising a detonator shell, the detonator shell comprising an upper shell and a lower shell, the top of the upper shell being sealed by a plastic plug, the upper shell and the lower shell being integrally connected by inner and outer steps, the outer diameter of the upper shell being larger than the outer diameter of the lower shell, and the inner diameter of the upper shell being larger than the inner diameter of the lower shell; secondary main explosives are filled in the lower shell, a buffer material is filled above the main explosives, the upper surface of the buffer material is flush with the lower edges of the inner and outer steps, a large inner tube installed in the upper shell is abutted against the inner and outer steps, the large inner tube is filled with quadruple charges, a firing cap arranged in the large inner tube is installed on the top of the quadruple charges, a detonating assembly is clamped above the firing cap, and a foot line of the detonating assembly passes through the plastic plug.

[0006] During implementation, it includes a detonator shell, which includes an upper shell and a lower shell. The length of the upper shell is greater than that of the lower shell. The top of the upper shell is sealed by a plastic plug. The upper shell and the lower shell are integrally connected by inner and outer steps. The surfaces of the inner and outer steps are inclined. The diameter change of the detonator shell makes the structure inside the detonator more stable. The outer diameter of the upper shell is greater than the outer diameter of the lower shell, and the inner diameter of the upper shell is greater than the inner diameter of the lower shell. This can effectively ensure that the thickness of the tube wall is uniform and stable, and can maintain stable performance under various environmental conditions, while increasing the volume inside the upper shell.

[0007] The lower tube shell is filled with two main explosives, which are RDX and PETN respectively. RDX is filled below PETN, and buffer material is filled above the main explosive, which is perlite buffer material. The filling height of the main explosive and buffer material is 23mm, and the upper surface of the buffer material is flush with the lower edge of the inner and outer steps. The inner and outer steps are against a large inner tube installed in the upper tube shell, and the top edge of the large inner tube is close to the lower edge of the plastic plug. The four secondary charges, the primer, and the detonating assembly are completely installed in the large inner tube, which improves the safety during detonation and the overall restraint of the detonator, so that the high-temperature and high-pressure gas breaks through downward along the detonator to the three lower parts below. Secondary charge, namely two main explosives and buffer materials, is filled with fourth charge in the large inner tube. The fourth charge is low-sensitivity Taian, and the filling height of the fourth charge is 6mm. The large inner tube is installed on the top of the inner and outer steps to keep the position of the large inner tube stable. At the same time, the overall restraint force is improved to ensure the downward transmission of the energy of the fourth charge. A flash cap set in the large inner tube is installed on the top of the fourth charge. The height of the flash cap is 6mm, and the top of the flash cap is 55mm away from the top of the detonator shell. The outer bottom surface of the flash cap is pressed on the top of the fourth charge, and a fire transfer hole is opened in the center of the bottom of the flash cap. The detonating assembly is clamped on the top of the flash cap, and the foot line of the detonating assembly passes through the plastic plug.

[0008] The detonating assembly includes an electronic control assembly, which realizes the time-controlled detonating function through digital management of electronic chips and millisecond and second delays. A chip charge head is provided on the side of the electronic control assembly close to the fourth charge, and a chip charge head is provided in the primer cap. The other end of the electronic control assembly is connected to the foot line.

[0009] As another preferred method, the detonating assembly includes a firing capacitor, and the top of the firing capacitor is connected to a foot line. The use of a firing capacitor avoids the potential danger caused by the uncertainty of the ignition powder coated on the chip powder head, realizes the inherent safety of the filling process in the detonator production process, eliminates the industrial pollution caused by the manufacturing of the detonator, and significantly improves the impact resistance and high temperature resistance during transportation and use.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The utility model provides an electronic detonator with an inner and outer stepped large inner tube and no explosive. By using a large inner tube to annularly wrap the quaternary charge, the primer and the detonating component, the detonation process occurs in the wrapping of the large inner tube and the detonator tube shell (upper tube shell). The double-layer outer tube protects the high-temperature and high-pressure gas generated in the detonation process, which promotes the downward conduction of energy. The electronic detonator is not prone to half-explosion. After the quaternary charge burns, a large amount of heat is generated, which continues to ignite the tertiary charge downward to complete safe detonation, greatly improving the safety of detonation and reducing safety hazards.

[0012] At the same time, the inner and outer steps cooperate with the large inner tube to ensure the stable installation of the large inner tube, while also providing a larger installation space for the detonating components in the upper tube shell, thereby improving applicability.

[0013] The use of capacitor initiation can avoid the potential danger of the ignition powder on the chip charge to a greater extent, and avoid the accidental ignition of the ignition powder due to the increase in temperature during transportation and storage. It realizes the inherent safety of the loading process in the detonator production process, eliminates the industrial pollution caused by the manufacturing of the explosive, and significantly improves the impact resistance and high temperature resistance during transportation and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional schematic diagram of the utility model.

[0015] Figure 2 The utility model is a cross-sectional schematic diagram of the detonator shell.

[0016] Figure 3 It is a cross-sectional schematic diagram of the large inner tube in the utility model.

[0017] Figure 4 It is a cross-sectional schematic diagram of the primer in the utility model.

[0018] Figure 5 It is a cross-sectional schematic diagram of the detonation assembly in Example 1.

[0019] Figure 6 It is a cross-sectional schematic diagram of the detonation assembly in Example 2.

[0020] The following are marked in the figure:

[0021] 1-upper tube shell, 2-lower tube shell, 3-inner and outer steps, 4-main explosive, 5-buffer material, 6-large inner tube, 7-quaternary explosive, 8-priming cap, 9-detonating assembly, 901-chip charge head, 902-firing capacitor, 903-foot wire, 10-plastic plug. DETAILED DESCRIPTION

[0022] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings. Example 1

[0023] An inner and outer stepped large inner tube electronic detonator without explosive, such as Figures 1 to 5 As shown: it includes a detonator shell, which includes an upper shell 1 and a lower shell 2. The length of the upper shell 1 is greater than that of the lower shell 2. The top of the upper shell 1 is sealed by a plastic plug 10. The upper shell 1 and the lower shell 2 are integrally connected by inner and outer steps 3. The surfaces of the inner and outer steps 3 are inclined. The diameter change of the detonator shell makes the structure inside the detonator more stable. The outer diameter of the upper shell 1 is greater than the outer diameter of the lower shell 2, and the inner diameter of the upper shell 1 is greater than the inner diameter of the lower shell 2. This can effectively ensure that the thickness of the tube wall is uniform and stable, and can maintain stable performance under various environmental conditions, while increasing the volume inside the upper shell 1.

[0024] The lower tube shell 2 is filled with two main explosives 4, which are RDX and PETN respectively. RDX is filled below PETN, and a buffer material 5 is filled above the main explosive 4. The buffer material is a perlite buffer material. The filling height of the main explosive and the buffer material is 23 mm. The upper surface of the buffer material 5 is flush with the lower edge of the inner and outer steps 3. The inner and outer steps 3 are against a large inner tube 6 installed in the upper tube shell 1. The top edge of the large inner tube 6 is close to the lower edge of the plastic plug 10. The quaternary charge 7, the primer 8, and the detonating assembly 9 are completely installed in the large inner tube 6, which improves the safety during detonation and the overall restraint of the detonator, so that the high-temperature and high-pressure gas breaks through the tertiary charge below along the direction of the detonator. , namely two main explosives and buffer materials, the large inner tube 6 is filled with quaternary charge 7, the quaternary charge 7 is low-sensitivity Taian, the filling height of the quaternary charge is 6mm, the large inner tube 6 is top-mounted at 3 places of the inner and outer steps, the position of the large inner tube 6 is kept stable, and at the same time the overall restraint force is improved to ensure the downward transmission of the energy of the quaternary charge 7, the top of the quaternary charge 7 is installed with a flash cap 8 arranged in the large inner tube 6, the height of the flash cap 8 is 6mm, the top of the flash cap 8 is 55mm away from the top of the detonator shell, the outer bottom surface of the flash cap 8 is pressed on the top of the quaternary charge 7, a fire transfer hole is opened in the center of the bottom of the flash cap 8, a detonating assembly 9 is clamped on the top of the flash cap 8, and the foot line of the detonating assembly 9 passes through the plastic plug 10.

[0025] like Figure 5 As shown: the detonating component 9 includes an electronic control component, which realizes the time-controlled detonating function through digital management of electronic chips and millisecond and second delays. A chip head 901 is provided on the side of the electronic control component close to the fourth charge 7, and a chip head 901 is provided in the primer cap 8. The other end of the electronic control component is connected to the foot line 903. Example 2

[0026] An inner and outer stepped large inner tube electronic detonator without explosive, such as Figure 6 As shown: except for the different structure of the detonating assembly 9, the rest is consistent with Example 1.

[0027] The detonating assembly 9 includes a firing capacitor 902, and the top of the firing capacitor 902 is connected to a foot line 903. The use of the firing capacitor avoids the potential danger caused by the uncertainty of the ignition powder coated on the chip powder head, realizes the inherent safety of the filling process in the detonator production process, eliminates the industrial pollution caused by the manufacturing of the detonator, and significantly improves the impact resistance and high temperature resistance during transportation and use.

[0028] The scope of protection claimed by the present invention is not limited to the above specific implementation methods. For those skilled in the art, the present invention may have various deformations and changes. Any modification, improvement and equivalent substitution made within the concept and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electronic detonator with inner and outer steps and a large inner tube without explosive, characterized in that: The detonator shell comprises an upper shell (1) and a lower shell (2), the top of the upper shell (1) is sealed by a plastic plug (10), the upper shell (1) and the lower shell (2) are integrally connected by inner and outer steps (3), the outer diameter of the upper shell (1) is greater than the outer diameter of the lower shell (2), and the inner diameter of the upper shell (1) is greater than the inner diameter of the lower shell (2); The lower tube shell (2) is filled with secondary main explosive (4), and a buffer material (5) is filled above the main explosive (4). The upper surface of the buffer material (5) is flush with the lower edge of the inner and outer steps (3). The inner and outer steps (3) are abutted against a large inner tube (6) installed in the upper tube shell (1). The large inner tube (6) is filled with quaternary explosive (7). A flash cap (8) arranged in the large inner tube (6) is installed on the top of the quaternary explosive (7). A detonating assembly (9) is clamped above the flash cap (8), and a foot line (903) of the detonating assembly (9) passes through a plastic plug (10).

2. The electronic detonator with inner and outer steps and large inner tube and no explosive according to claim 1, characterized in that: The detonating assembly (9) comprises an electronic control assembly, a chip charge head (901) is provided on one side of the electronic control assembly close to the quaternary charge (7), and the other end of the electronic control assembly is connected to a foot line (903).

3. The electronic detonator with inner and outer steps and large inner tube and no explosive according to claim 1, characterized in that: The detonating assembly (9) comprises a firing capacitor (902), and the top end of the firing capacitor (902) is connected to a foot line (903).

4. The electronic detonator with inner and outer steps and large inner tube and no explosive according to claim 1, characterized in that: The surfaces of the inner and outer steps (3) are inclined.

5. The electronic detonator with inner and outer steps and large inner tube and no explosive according to claim 2, characterized in that: The outer bottom surface of the primer cap (8) is pressed onto the top of the quaternary charge (7), a fire transfer hole is provided in the center of the bottom of the primer cap (8), and a chip charge head (901) is provided inside the primer cap (8).

6. The electronic detonator with inner and outer steps and large inner tube and no explosive according to claim 1, characterized in that: The two main explosives (4) are RDX and PETN respectively, the buffer material is perlite buffer material, and the quaternary charge (7) is low-sensitivity PETN.

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