Pressure-resistant electronic detonator

Abstract

The utility model discloses a kind of pressure-resistant electronic detonator, including detonator, the top of detonator inner chamber is inserted with rubber plug, the rubber plug includes cylindrical rubber plug body, first annular extension edge, annular insertion slot, wiring hole, second annular extension edge and third annular extension edge, reinforcing sealing structure is inserted in the rubber plug, reinforcing sealing structure is made of two groups of half-cone ring, the cylindrical rubber plug body is integrally injection molded.The utility model discloses a kind of pressure-resistant electronic detonator, by the reinforcing sealing structure of inflatable and the combination of multistage annular extension edge, actively enhanced radial sealing pressure and formed redundancy sealing barrier, to significantly improve the sealing reliability and long-term stability of electronic detonator under high pressure environment.

Description

Technical Field

[0001] This utility model relates to the field of electronic detonator technology, specifically a pressure-resistant electronic detonator. Background Technology

[0002] Electronic detonators, widely used in engineering blasting, directly impact the effectiveness of blasting operations due to their reliability and safety. In special operating environments (such as underwater blasting, deep well blasting, and high-pressure oil and gas well operations), electronic detonators must withstand high external hydrostatic pressure or soil pressure for extended periods. Defects in the sealing structure can allow external liquids or high-pressure gases to easily penetrate the detonator, causing electronic components to become damp, short-circuit, or malfunction, severely affecting blasting reliability.

[0003] Currently, most conventional electronic detonators employ a single rubber plug structure to achieve lead wire exit and cavity sealing, relying on the elastic deformation of the rubber to press against the inner wall of the detonator to form a seal. However, under high-pressure environments, this structure has significant shortcomings: on the one hand, the contact pressure between the rubber plug and the detonator wall and lead wire is limited, making it difficult to effectively resist the penetration of continuously high-pressure fluids; on the other hand, rubber materials are prone to stress relaxation under long-term high-pressure action, leading to a gradual decline in sealing performance.

[0004] Therefore, we propose a pressure-resistant electronic detonator. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a pressure-resistant electronic detonator. By combining an expandable reinforced sealing structure with multi-stage annular extension, it actively enhances the radial sealing pressure and forms a redundant sealing barrier, thereby significantly improving the sealing reliability and long-term stability of the electronic detonator under high-pressure environments. This effectively solves the problems in the background technology.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a pressure-resistant electronic detonator, comprising a detonator, wherein a rubber plug is inserted into the top of the inner cavity of the detonator, the rubber plug comprising a cylindrical rubber plug body, a first annular extension, an annular insertion groove, a wiring hole, a second annular extension and a third annular extension, wherein a reinforcing sealing structure is inserted into the rubber plug, the reinforcing sealing structure being composed of two sets of semi-conical rings, and the cylindrical rubber plug body being integrally injection molded.

[0009] Preferably, the wiring hole is located in the middle of the outer surface of the upper end of the cylindrical rubber plug, and the wiring hole extends to the middle of the outer surface of the lower end of the cylindrical rubber plug; the number of the second annular extension is three sets, and they are evenly distributed along the axial direction of the wiring hole.

[0010] Preferably, the annular insertion groove is formed on the upper outer surface of the cylindrical rubber plug, and the number of the third annular extensions is four sets, with the four sets of third annular extensions fixed at equal intervals along the vertical direction on the inner side of the annular insertion groove.

[0011] Preferably, the number of the first annular extensions is three sets, and the three sets of the first annular extensions are fixed at equal intervals along the vertical direction on the outer wall of the cylindrical rubber plug.

[0012] Preferably, the two sets of semi-conical rings are connected to the annular insertion groove by insertion.

[0013] Preferably, the outer contour of the two sets of semi-conical rings after being joined together has a maximum outer diameter greater than the inner diameter of the bottom of the annular insertion groove; after the semi-conical ring is inserted into the annular insertion groove, the cylindrical rubber plug undergoes radial expansion.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a pressure-resistant electronic detonator, which has the following beneficial effects:

[0016] 1. This pressure-resistant electronic detonator, through multiple first annular extensions set between the outside of the plug and the inner wall of the detonator, and multiple second annular extensions set between the wiring hole and the wire, constitutes an internal and external double sealing system. The multi-lip design forms multiple independent sealing barriers, which greatly extends the penetration path of external high-pressure fluids (such as water, mud, and gas). Even if the sealing effect of a certain lip is temporarily reduced due to pressure or wear, the subsequent lips can still provide an effective seal, creating a redundancy backup effect, thereby ensuring the sealing reliability of the electronic detonator under long-term static pressure environment.

[0017] 2. The core innovation of this pressure-resistant electronic detonator lies in its design of a reinforced sealing structure composed of detachable semi-conical rings. When this structure is inserted into the annular insertion groove, its combined outer diameter is larger than the inner diameter of the groove bottom, which forces the rubber plug to undergo controllable and uniform radial expansion from the inside. This expansion process produces two key effects: first, it significantly increases the contact pressure and contact area between the first annular extension and the inner wall of the detonator, strengthening the main sealing interface; second, it simultaneously increases the clamping force between the second annular extension and the surface of the lead wire, strengthening the lead wire sealing interface. This active pressurization method from the inside out effectively overcomes the shortcomings of relying solely on the insufficient pre-tightening force of rubber elasticity, enabling the sealing performance to adapt to and resist higher external pressures.

[0018] 3. This pressure-resistant electronic detonator features a reinforced sealing structure using two semi-conical rings joined together. This allows for easy insertion and assembly from above after the rubber plug is inserted into the detonator and threaded, solving the problem of difficult installation of integral rigid rings. Under long-term high pressure, rubber materials undergo creep and stress relaxation, leading to a decrease in sealing pressure. In this invention, the inserted rigid semi-conical ring provides continuous support for the rubber plug, effectively inhibiting creep deformation of the rubber and compensating for the decrease in sealing contact pressure due to stress relaxation. This maintains the long-term stability of the sealing effect and extends the product's service life. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a pressure-resistant electronic detonator according to this utility model.

[0020] Figure 2 This is a partial structural schematic diagram of a pressure-resistant electronic detonator according to the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the rubber stopper in a pressure-resistant electronic detonator according to the present invention.

[0022] Figure 4 This is a side cross-sectional view of the rubber plug in a pressure-resistant electronic detonator according to this utility model.

[0023] Figure 5 This is an exploded view of the reinforced sealing structure in a pressure-resistant electronic detonator according to the present invention.

[0024] In the diagram: 1. Detonator; 2. Rubber plug; 3. Reinforced sealing structure; 4. Cylindrical rubber plug body; 5. First annular extension; 6. Annular insertion groove; 7. Wiring hole; 8. Second annular extension; 9. Third annular extension; 10. Semi-conical ring. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] This embodiment is a pressure-resistant electronic detonator.

[0027] like Figure 1-5 As shown, the device includes a detonator 1, with a rubber plug 2 inserted into the top of the inner cavity of the detonator 1. The rubber plug 2 includes a cylindrical rubber plug body 4, a first annular extension 5, an annular insertion groove 6, a wiring hole 7, a second annular extension 8, and a third annular extension 9. A reinforcing sealing structure 3 is inserted into the rubber plug 2. The reinforcing sealing structure 3 consists of two sets of semi-conical rings 10. The cylindrical rubber plug body 4 is integrally injection molded.

[0028] The wiring hole 7 is located in the middle of the upper outer surface of the cylindrical rubber plug 4, and extends to the middle of the lower outer surface of the cylindrical rubber plug 4. There are three sets of second annular extensions 8, which are evenly distributed along the axial direction of the wiring hole 7. The annular insertion groove 6 is located on the upper outer surface of the cylindrical rubber plug 4. There are four sets of third annular extensions 9, which are evenly fixed in the vertical direction on the inner side of the annular insertion groove 6. There are three sets of first annular extensions 5, which are evenly fixed in the vertical direction on the outer wall of the cylindrical rubber plug 4. The two sets of semi-conical rings 10 are inserted into the annular insertion groove 6. The outer contour of the two sets of semi-conical rings 10 after being joined together has a maximum outer diameter greater than the inner diameter of the bottom of the annular insertion groove 6. After the semi-conical rings 10 are inserted into the annular insertion groove 6, the cylindrical rubber plug 4 expands radially.

[0029] It should be noted that this utility model is a pressure-resistant electronic detonator. The detonator 1 described in this article belongs to the prior art and can be effectively known to those skilled in the art. The specific details will not be repeated. The rubber plug 2 is set, and the cylindrical rubber plug body 4 is inserted into one end of the inner cavity of the detonator 1. The first annular extension 5 is squeezed between the cylindrical rubber plug body 4 and the detonator 1. The wire passes through the wiring hole 7. The second annular extension 8 is squeezed between the cylindrical rubber plug body 4 and the outer wall of the wire. Both the first annular extension 5 and the second annular extension 8 play the role of anti-slip and sealing. Then, two sets of semi-conical rings 10 are inserted into the annular insertion groove 6, which provides continuous support, effectively inhibits the creep deformation of the rubber, compensates for the decrease in sealing contact pressure due to stress relaxation, thereby maintaining the long-term stability of the sealing effect and extending the service life of the product. Thus, in underwater blasting and deep well operations, it is necessary to resist external water pressure or soil pressure and prevent liquid or high-pressure gas from entering and causing short circuit or failure of the circuit.

[0030] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A voltage-resistant electronic detonator, comprising a detonator (1), characterized in that: A rubber plug (2) is inserted into the top of the inner cavity of the detonator (1). The rubber plug (2) includes a cylindrical rubber plug body (4), a first annular extension (5), an annular insertion groove (6), a wiring hole (7), a second annular extension (8) and a third annular extension (9). A reinforcing sealing structure (3) is inserted into the rubber plug (2). The reinforcing sealing structure (3) is composed of two sets of semi-conical rings (10). The cylindrical rubber plug body (4) is integrally injection molded.

2. The voltage-resistant electronic detonator according to claim 1, characterized in that: The wiring hole (7) is opened in the middle of the upper outer surface of the cylindrical rubber plug (4), and the wiring hole (7) extends to the middle of the lower outer surface of the cylindrical rubber plug (4); the number of the second annular extension (8) is three sets, and they are evenly distributed along the axial direction of the wiring hole (7).

3. The voltage-resistant electronic detonator according to claim 2, characterized in that: The annular insertion groove (6) is opened on the upper outer surface of the cylindrical rubber plug (4). There are four sets of the third annular extension (9). The four sets of the third annular extension (9) are fixed at equal intervals along the vertical direction on the inner side of the annular insertion groove (6).

4. The voltage-resistant electronic detonator according to claim 3, characterized in that: The number of the first annular extension (5) is three sets, and the three sets of the first annular extension (5) are fixed at equal intervals along the vertical direction on the outer wall of the cylindrical rubber plug (4).

5. A voltage-resistant electronic detonator according to claim 4, characterized in that: The two sets of semi-conical rings (10) are connected to the annular insertion groove (6) by insertion.

6. A voltage-resistant electronic detonator according to claim 5, characterized in that: The outer contour of the two sets of semi-conical rings (10) after being spliced ​​together has a maximum outer diameter that is greater than the inner diameter of the bottom of the annular insertion groove (6); after the semi-conical ring (10) is inserted into the annular insertion groove (6), the cylindrical rubber plug (4) expands radially.

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