A basic detonator

Abstract

The present invention discloses a primary detonator, whose structure includes a detonator shell, a tube groove, a third pressing charge layer, a second pressing charge layer, a first pressing charge layer, a paint layer, a through hole, a strengthening cap, a groove, and glass microspheres. The present invention has the following beneficial effects. By thickening the wall thickness of the detonator shell and increasing the pressing charge density of the primary charge, the initiation ability of the detonator is improved. At the same time, there is a groove on the detonator shell with glass microspheres adhered by paint. After the detonator explodes, the glass microspheres are shot into the explosive, forming bubbles that are stable and have a good physical sensitization effect, further improving the detonation ability of the detonator and making the detonator more conducive to detonating the explosive. By setting the contact surface between the second pressing charge layer and the third pressing charge layer as a conical groove, the contact area is increased and the reliability of initiation is improved. Compared with traditional detonators, the charge amounts of the priming explosive and the secondary explosive in the second pressing charge layer can be reduced, solving the problem that the shell disintegrates in advance due to excessive amounts of the priming explosive and the secondary charge, and the charge at the bottom of the detonator body cannot be normally initiated.

Description

Technical Field

[0001] The present invention belongs to the field of civil explosive tools, and particularly relates to a basic detonator. Background Art

[0002] The full name of civil explosives is civil explosive articles, which is mainly engaged in the high-risk industries of producing explosives and facility blasting. A detonator is a main initiating material for blasting engineering. Its function is to generate initiating energy to detonate various explosives, detonating cords, and detonating pipes. With the development of the civil explosive industry, the requirements for the power and safety of detonators are constantly increasing. However, the traditional basic detonators have the following deficiencies:

[0003] 1. For the sake of the production safety of explosives, the sensitivity of explosives is getting lower and lower. The traditional detonator has a simple structure and simply detonates the explosive through the detonation wave of the primary explosive. After the sensitivity of the explosive decreases, it will lead to poor detonating ability of the detonator, resulting in the situation that the detonator rings but the explosive does not ring, which causes inconvenience and affects the use safety at the same time.

[0004] 2. For the sake of the production safety of detonators, the mechanical sensitivity and thermal sensitivity of the primary explosive used in the detonator itself also decrease, reducing the initiating ability of the primary explosive. In order to ensure the initiating effect, it is necessary to increase the amount of primary explosive and booster explosive accordingly. However, when the loading amounts of the primary explosive and booster explosive increase, there is a hidden danger that the booster explosive in the detonator is not detonated, and the detonator body starts to disintegrate at the position of the primary explosive, resulting in the failure to normally initiate the charge at the bottom of the detonator body and making it more difficult to detonate the booster explosive. Summary of the Invention

[0005] (1) Technical Problems to be Solved

[0006] In order to overcome the deficiencies of the prior art, a basic detonator is proposed to solve the situation in the prior art that for the sake of the production safety of explosives, the sensitivity of explosives is getting lower and lower. The traditional detonator has a simple structure and simply detonates the explosive through the detonation wave of the primary explosive. After the sensitivity of the explosive decreases, it will lead to poor detonating ability of the detonator, resulting in the situation that the detonator rings but the explosive does not ring, which causes inconvenience and affects the use safety at the same time.

[0007] Secondly, to solve the situation in the prior art that for the sake of the production safety of detonators, the mechanical sensitivity and thermal sensitivity of the primary explosive used in the detonator itself also decrease, reducing the initiating ability of the primary explosive. In order to ensure the initiating effect, it is necessary to increase the amount of primary explosive and booster explosive accordingly. However, when the loading amounts of the primary explosive and booster explosive increase, there is a hidden danger that the booster explosive in the detonator is not detonated, and the detonator body starts to disintegrate at the position of the primary explosive, resulting in the failure to normally initiate the charge at the bottom of the detonator body and making it more difficult to detonate the booster explosive.

[0008] (2) Technical Solutions

[0009] The present invention is achieved through the following technical solutions: The present invention provides a base detonator, whose structure includes a detonator housing, a tube groove, a third pressed explosive layer, a second pressed explosive layer, a first pressed explosive layer, a paint layer, a through hole, a strengthening cap, a groove, and glass microspheres;

[0010] The tube groove is provided on the detonator housing. One end of the tube groove penetrates through the detonator housing. A groove is provided on the side of the detonator housing away from the penetration side of the tube groove. The glass microspheres are adhered to the groove through the paint layer. The third pressed explosive layer, the second pressed explosive layer, and the first pressed explosive layer are all assembled in the tube groove. The second pressed explosive layer is arranged between the third pressed explosive layer and the first pressed explosive layer. The first pressed explosive layer is arranged on the side of the tube groove adjacent to the paint layer. The end of the third pressed explosive layer away from the second pressed explosive layer is assembled with a strengthening cap by stamping. A through hole is provided through the middle of the strengthening cap. The connection end of the third pressed explosive layer and the second pressed explosive layer is a conical structure protruding towards the paint layer direction, and the protruding part of the conical structure is arc-shaped.

[0011] Further, the inner diameter of the detonator housing remains unchanged, and the outer diameter of the detonator housing increases from the traditional diameter of 6.88 mm -0 + 0.06 mm to a diameter of 6.92 mm -0 +0.6 mm.

[0012] Further, the thickness of the glass microspheres adhered to the groove through the paint layer is 0.2 mm to 0.4 mm, and the particle size of the glass microspheres is 100 to 200 μm.

[0013] Further, the pressing density of the first pressed explosive layer increases from the traditional approximately 1.5 g / cm 3 to approximately 1.6 - 1.7 g / cm 3 .

[0014] Further, the density of the second pressed explosive layer decreases from the traditional approximately 1.3 g / cm 3 to 1.1 - 1.2 g / cm 3 .

[0015] Further, the first pressed explosive layer and the second pressed explosive layer adopt high explosives, and the high explosives can be cyclotrimethylenetrinitramine or pentaerythritol tetranitrate. The third pressed explosive layer is a primary explosive.

[0016] (III) Beneficial effects

[0017] One of the above technical solutions has the following advantages or beneficial effects:

[0018] 1). To address the issue in the prior art that for the sake of production safety of explosives, the sensitivity of explosives has been decreasing. The traditional detonator has a simple structure and only detonates the explosive by the detonation wave of the booster explosive. After the sensitivity of the explosive decreases, the detonating ability of the detonator will be poor, resulting in the situation where the detonator explodes but the explosive does not. This causes inconvenience and affects the use safety at the same time. By increasing the wall thickness of the detonator shell, restricting the forward propagation of the detonation inside the detonator, and increasing the pressing density of the primary charge, the output detonation wave speed is increased, and the initiating ability of the detonator is improved. At the same time, a groove is provided on the outer wall of the detonator shell in the detonation direction, and a layer of glass microspheres is painted in the groove. After the detonator explodes, the glass microspheres are shot into the explosive. The bubbles formed by the glass microspheres are stable and have a good physical sensitization effect, further improving the detonating ability of the detonator, making the detonator more conducive to detonating the explosive, greatly improving the initiating ability of the detonator after the sensitivity of the explosive decreases, and better avoiding the situation where the detonator explodes but the explosive does not.

[0019] 2). To solve the problem in the prior art that for the sake of production safety of detonators, the mechanical sensitivity and thermal sensitivity of the initiating explosive used in the detonator itself also decrease, resulting in a decrease in the initiating ability of the initiating explosive. To ensure the initiating effect, it is necessary to correspondingly increase the amount of the initiating explosive and the booster explosive. However, when the loading amounts of the initiating explosive and the booster explosive increase, there is a hidden danger that the booster explosive in the detonator is not detonated, and the detonator body starts to disintegrate at the initiating explosive part, which may lead to the situation that the charge at the bottom of the detonator body cannot be normally initiated, and it is more difficult to detonate the booster explosive. At the same time, the initiating reliability of the detonator is also reduced. By setting the contact surface between the second pressing layer and the third pressing layer as a conical groove protruding towards the first pressing layer, the contact area between the initiating explosive in the third pressing layer and the second pressing layer is increased, making the detonation growth faster and improving the initiating reliability. At the same time, under the condition of the same initiating effect, compared with the traditional detonator, the loading amounts of the initiating explosive and the booster explosive in the second pressing layer can be reduced, solving the problem that the detonator body disintegrates in advance due to the excessive amounts of the initiating explosive and the secondary charge, and the charge at the bottom of the detonator body cannot be normally initiated. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objects, and advantages of the present invention will become more apparent:

[0021] Figure 1 It is a schematic structural diagram of a basic detonator of the present invention;

[0022] Figure 2 It is a schematic cross-sectional structural diagram of the front view of a basic detonator of the present invention;

[0023] Figure 3 For the present invention Figure 2 The enlarged structural diagram of A in it;

[0024] Figure 4 For the present invention Figure 2Schematic enlarged structure diagram of B;

[0025] In the figure: detonator housing - a, tube groove - b, third pressed explosive layer - c, second pressed explosive layer - d, first pressed explosive layer - e, paint layer - f, through hole - g, strengthening cap - h, groove - i, glass microspheres - j. Specific embodiments

[0026] The present invention will be further described in detail below in conjunction with embodiments, but the embodiments of the present invention are not limited thereto.

[0027] The present invention provides a base detonator: its structure includes a detonator housing a, a tube groove b, a third pressed explosive layer c, a second pressed explosive layer d, a first pressed explosive layer e, a paint layer f, a through hole g, a strengthening cap h, a groove i, and glass microspheres j;

[0028] A tube groove b is provided on the detonator housing a, one end of the tube groove b penetrates through the detonator housing a, the inner diameter of the detonator housing a remains unchanged, and the outer diameter of the detonator housing a increases from the traditional diameter of 6.88 mm -0 +0.06 mm to a diameter of 6.92 mm -0 +0.6 A groove i is provided at the end of the detonator housing a away from the end penetrated by the tube groove b, and a layer of glass microspheres j with a thickness of 0.2 - 0.4 mm is adhered in the groove i through a paint layer f;

[0029] First, a traditional planar punch is used to press high explosive into the first pressed explosive layer e of the tube groove b. When pressing the first pressed explosive layer e, the density rises from the traditional about 1.5 g / cm 3 to about 1.6 - 1.7 g / cm 3 . Then, a conical punch is used to press the high explosive of the second pressed explosive layer d, thereby improving its initiation ability for the explosive. When pressing the second pressed explosive layer d, the pressing height remains unchanged, and the density decreases from the traditional about 1.3 g / cm 3 to 1.1 - 1.2 g / cm 3, since the second pressed explosive layer d mainly provides space for the stable growth of detonation, the detonating power of the detonator is mainly determined by the amount and density of the first pressed explosive layer e, making the detonator more conducive to being excited by the priming explosive while ensuring the detonating power. And due to the reduced charge density and the unchanged pressing height of the second pressed explosive layer d, using a conical punch to press the second pressed explosive layer d can reduce the amount of explosive by about one-third compared with traditional pressing. Finally, after pressing the detonating explosive of the third pressed explosive layer c with a traditional flat punch, the reinforcement cap h is pressed in for limitation. A through hole g is provided through the center of the reinforcement cap h. Since the upper pressing shape of the second pressed explosive layer d is changed from traditional flat pressing to conical pressing, the detonating explosive of the subsequent pressed third pressed explosive layer c can penetrate into the interior of the second pressed explosive layer d, enabling the detonating explosive to have not only axial detonation ability but also lateral detonation ability, greatly improving the detonation effect of the detonating explosive, and thus reducing the charge amount of the detonating explosive in the third pressed explosive layer c.

[0030] Among them, the detonator housing a can adopt a steel flange housing.

[0031] Among them, the particle size of the glass microspheres is 100 - 200 μm.

[0032] Among them, the protruding part of the conical structure adopts an arc shape, and both the recessed part of the groove i facing the inside of the detonator housing a and the part connected to the detonator housing a adopt arc shapes to avoid generating gaps during pressing.

[0033] Among them, the high explosive can be cyclotrimethylenetrinitramine or pentaerythritol tetranitrate.

[0034] Embodiment: During the use of the detonator, since the wall thickness of the detonator housing a is increased, it can restrain the forward propagation of the detonation inside the detonator, and by increasing the charge pressing density of the first pressed explosive layer e, the output detonation wave velocity is also increased. And for a layer of glass microspheres j painted on the outer wall groove i of the detonator housing a, after the detonator explodes, the glass microspheres j will be shot into the explosive. The bubbles formed by the glass microspheres j are stable and have a good physical sensitization effect, making the detonator more conducive to detonating the explosive during use, greatly improving the detonating ability of the detonator after the sensitivity of the explosive is reduced, and better avoiding the situation where the detonator explodes but the explosive does not detonate.

[0035] At the same time, since the contact surface shape of the high explosive in the second pressed explosive layer d and the detonating explosive in the third pressed explosive layer c in the detonator body adopts a conical shape with an arc-shaped protrusion, the contact area between the detonating explosive in the third pressed explosive layer c and the high explosive in the second pressed explosive layer d can be increased, making the detonation growth faster, improving the reliability of detonation, and enabling the charge amounts of the detonating explosive and the high explosive in the second pressed explosive layer d to be lower than the traditional charge amounts under the same detonation effect, solving the problem that the excessive charge amounts of the detonating explosive and the secondary charge cause the shell to disintegrate in advance and fail to normally detonate the charge at the bottom of the detonator body.

[0036] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For a person skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced by the present invention. Any reference signs in the claims should not be construed as limiting the claims concerned.

[0037] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. A person skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art.

Claims

1. A primary detonator, the structure of which comprises a detonator housing (a), a tube groove (b), a third pressing explosive layer (c), a second pressing explosive layer (d), a first pressing explosive layer (e), a paint layer (f), a through hole (g), a strengthening cap (h), a groove (i), and glass microspheres (j); It is characterized in that: The tube groove (b) is arranged on the detonator housing (a), one end of the tube groove (b) penetrates through the detonator housing (a), a groove (i) is arranged on the side of the detonator housing (a) away from the penetrating side of the tube groove (b), the glass microspheres (j) are adhered to the groove (i) through the paint layer (f), the third pressing explosive layer (c), the second pressing explosive layer (d), and the first pressing explosive layer (e) are all assembled in the tube groove (b), the second pressing explosive layer (d) is arranged between the third pressing explosive layer (c) and the first pressing explosive layer (e), the first pressing explosive layer (e) is arranged on the side of the tube groove (b) adjacent to the paint layer (f), a strengthening cap (h) is assembled at the end of the third pressing explosive layer (c) away from the second pressing explosive layer (d) through stamping, a through hole (g) is penetrated through the middle of the strengthening cap (h), and the connecting end of the third pressing explosive layer (c) and the second pressing explosive layer (d) is a conical structure protruding towards the paint layer (f), and the protruding part of the conical structure is arc-shaped.

2. The base detonator according to claim 1, characterized in that: The inner diameter of the detonator housing (a) remains unchanged, and the outer diameter of the detonator housing (a) increases from the traditional 6.88 mm -0 +0.06 to 6.92 mm -0 +0.6 mm.

3. The base detonator according to claim 1, characterized in that: The thickness of the glass microspheres (j) adhered to the groove (i) through the paint layer (f) is 0.2 mm to 0.4 mm, and the particle size of the glass microspheres is 100 to 200 μm.

4. A basic detonator according to claim 1, characterized in that: The pressing density of the first pressing layer (e) is increased from the conventional 1.5 g / cm 3 to 1.6 - 1.7 g / cm 3 .

5. The base detonator according to claim 1, characterized in that: The density of the second pressing drug layer (d) is reduced from the conventional 1.3 g / cm 3 to 1.1 - 1.2 g / cm 3 .

6. The base detonator according to claim 1, characterized in that: The first pressing explosive layer (e) and the second pressing explosive layer (d) are made of high explosives, and the high explosives are cyclotrimethylenetrinitramine or pentaerythritol tetranitrate, and the third pressing explosive layer (c) is a primary explosive.

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