Explosion-proof relay and processing die thereof

Abstract

The utility model provides a kind of explosion-proof relay and its processing mould, including body and the pressure relief plate being set in the upper body, the connecting position of the lower end surface of the pressure relief plate and the body is provided with pre-break slot, the upper end surface position of the pressure relief plate is provided with the slot of breaking, this explosion-proof relay can overcome the connecting strength between the pressure relief plate and the body in the prior art is higher, the shock wave in body cannot promptly break the pressure relief plate, to cause the defect that the relay combustion of body cannot promptly pressure relief.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof relay technology, specifically to an explosion-proof relay and its processing mold. Background Technology

[0002] Relays control large currents with small currents to achieve circuit isolation, signal amplification, and automated control. When sparks or high temperatures are generated in the internal circuit, if the casing cannot effectively release the explosive pressure or cool the flames, it will ignite the external hazardous environment. Explosion-proof relays are usually equipped with pressure relief plates so that when a short circuit occurs inside the relay, the shock wave can break through the pressure relief plate to release the pressure. In the existing technology, due to the high connection strength between the pressure relief plate and the body, the shock wave inside the body cannot break through the pressure relief plate in time, resulting in the inability to release pressure in the body in time and causing the relay to burn. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to overcome the defect in the prior art where the connection strength between the pressure relief plate and the body is high, and the shock wave inside the body cannot break through the pressure relief plate in time, thus causing the relay to burn due to the inability to release pressure in time. Therefore, this invention provides an explosion-proof relay and its processing mold that can be successfully destroyed by the shock wave.

[0004] Therefore, this utility model provides an explosion-proof relay, including a body and a pressure relief plate disposed on the upper part of the body. A pre-break groove is provided at the connection position between the lower end face of the pressure relief plate and the body, and a punching groove is provided at the upper end face of the pressure relief plate.

[0005] Furthermore: the pressure relief plate is arranged in a rectangular structure, and the pre-cut grooves are distributed along the circumference of the pressure relief plate.

[0006] Furthermore, a guide slope is provided at the connection between the punching groove and the housing, and the guide slope extends from the periphery to the center.

[0007] A processing mold for an explosion-proof relay includes a stationary mold and a moving mold disposed above the stationary mold. A cavity for forming a relay housing is provided between the moving mold and the stationary mold. An injection port for injecting material to form the relay housing is provided on the moving mold. A support plate and an extension block for forming a pre-cut groove are provided inside the cavity. A forming mechanism for forming a punched groove is also provided above the extension block. A forming space for forming a pressure relief plate is provided between the forming mechanism and the extension block.

[0008] Furthermore: the molding mechanism is fixedly mounted on the moving mold and moves vertically with the moving mold.

[0009] Furthermore: the molding mechanism includes a first molding block and a second molding block, and the injection port includes a first injection port that connects to the first molding block and extends into the molding space, a second injection port that connects to the second molding block and extends into the molding space, and a third injection port located between the first injection port and the second injection port and extending to the support plate.

[0010] Furthermore: an inclined surface of a molding guide slope is provided on the side of the first molding block and / or the second molding block opposite to the molding space, and a connecting plane is also provided at the connection position between the inclined surface and the first molding block and / or the second molding block. The inclined surface and the connecting plane are arranged along the circumferential direction of the first molding block and / or the second molding block.

[0011] Furthermore: a connecting block is provided between the first molding block and the second molding block, both the first molding block and the second molding block are fixed on the connecting block, and the connecting block is fixed on the moving mold and moves vertically with the moving mold.

[0012] The technical solution of this utility model has the following advantages: 1. The explosion-proof relay and its processing mold provided by this utility model, compared with the prior art, have a pre-break groove set at the connection position between the lower end face of the pressure relief plate and the body to reduce the connection strength between the two. A punching groove is set at the upper end face of the pressure relief plate to reduce the connection strength between the pressure relief plate and the body. This ensures that when a short circuit occurs inside the relay, the gas pressure generated can break open the pressure relief plate, so that the pressure inside the relay can be released, and finally the explosion-proof function is achieved.

[0013] 2. The present invention provides an explosion-proof relay and its processing mold. The pressure relief plate is arranged in a rectangular structure, and the pre-break grooves are distributed around the pressure relief plate to ensure that the connection strength at the connection between the pressure relief plate and the body is consistent. When air pressure is generated inside the relay, the pressure relief plate can be broken open from any position of the pre-break groove to complete the pressure relief. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of the explosion-proof relay; Figure 2 This is a cross-sectional structural diagram of an explosion-proof relay; Figure 3 for Figure 2Enlarged view of section A; Figure 4 This is a schematic diagram of the cross-sectional structure of the machining mold; Figure 5 for Figure 4 Enlarged view of section A; Figure 6 This is a schematic diagram of the structure of the internal cavity of the machining mold; Figure 7 This is a schematic diagram showing the location and structure of the injection port inside the machining mold; Figure 8 for Figure 7 Enlarged view of section C; Figure 9 A diagram showing the positional relationships of the forming mechanism within the machining mold; Figure 10 for Figure 9 Enlarged view of section D in the middle; Figure 11 This is a diagram showing the positional relationship between the connecting block and the injection port.

[0016] Explanation of reference numerals in the attached figures: 1. Body; 2. Pressure relief plate; 21. Pre-cut groove; 22. Punch-cut groove; 3. Guide slope; 4. Stationary mold; 5. Moving mold; 6. Cavity; 61. Support plate; 62. Extension block; 63. Molding space; 7. Injection port; 71. First injection port; 72. Second injection port; 73. Third injection port; 8. Molding mechanism; 81. First molding block; 82. Second molding block; 83. Inclined surface; 84. Connecting plane; 9. Connecting block. Detailed Implementation

[0017] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] Example This embodiment provides an explosion-proof relay, including a body 1 and a pressure relief plate 2 disposed above the body 1. A pre-break groove 21 is provided at the connection position between the lower end face of the pressure relief plate 2 and the body 1, and a punching groove 22 is provided at the upper end face of the pressure relief plate 2.

[0022] The specific improvements mentioned above are as follows: Figures 1-3 As shown, compared with the prior art, a pre-break groove 21 is provided at the connection position between the lower end face of the pressure relief plate 2 and the body 1 to reduce the connection strength between the two. A punching groove 22 is provided at the upper end face of the pressure relief plate 2 to reduce the connection strength between the pressure relief plate 2 and the body 1. This ensures that when a short circuit occurs inside the relay, the gas pressure generated can break open the pressure relief plate 2, so that the pressure inside the relay can be released, and finally the explosion-proof function can be achieved.

[0023] Based on the above embodiments: the pressure relief plate 2 is arranged in a rectangular structure, and the pre-cut groove 21 is distributed along the circumference of the pressure relief plate 2.

[0024] The specific improvements mentioned above are as follows: Figure 1 As shown, the pressure relief plate 2 is arranged in a rectangular structure, and the pre-break groove 21 is distributed around the pressure relief plate 2, thereby ensuring that the connection strength at the connection between the pressure relief plate 2 and the body 1 is consistent. When air pressure is generated in the relay, the pressure relief plate 2 can be broken open from any position of the pre-break groove 21 to complete the pressure relief.

[0025] Based on the above embodiments: a guide slope 3 is provided at the connection between the punching groove 22 and the shell, and the guide slope 3 extends from the periphery to the center.

[0026] The specific improvements mentioned above are as follows: Figures 1-3 As shown, a guide slope 3 is provided at the connection between the punching groove 22 and the shell. By setting the guide slope 3, stress concentration can be effectively reduced, preventing parts from cracking or fatigue failure. It can also optimize the flow of molten plastic, avoid uneven filling, and prevent an increase in scrap rate.

[0027] A processing mold for an explosion-proof relay includes a stationary mold 4 and a moving mold 5 disposed above the stationary mold 4. A cavity 6 for forming a relay housing is provided between the moving mold 5 and the stationary mold 4. An injection port 7 for injecting material to form the relay housing is provided on the moving mold 5. A support plate 61 and an extension block 62 for forming a pre-broken groove 21 are provided inside the cavity 6. A forming mechanism 8 for forming a punched groove 22 is also provided above the extension block 62. A forming space 63 for forming a pressure relief plate 2 is provided between the forming mechanism 8 and the extension block 62.

[0028] The specific improvements mentioned above are as follows: Figures 4-8 As shown, the processing mold includes a stationary mold 4 located at the bottom and a moving mold 5 located above the stationary mold 4. During the injection molding process, after the moving mold 5 and the stationary mold 4 are closed, the material is injected through the injection port 7. The material is formed in the cavity 6. An extension block 62 and a forming mechanism 8 are provided in the cavity 6, which can effectively and directly injection mold the pre-cut groove 21 and the punched groove 22. A forming space 63 is left between the extension block 62 and the forming mechanism 8 to facilitate the smooth passage of the material and thus form the pressure relief plate 2.

[0029] Based on the above embodiments: the molding mechanism 8 is fixedly mounted on the moving mold 5 and moves vertically with the moving mold 5.

[0030] The specific improvements mentioned above are as follows: Figure 7 and Figure 8 As shown, the molding mechanism 8 is fixed on the moving mold 5. After the injection molding is completed, the molding mechanism 8 moves upward with the moving mold 5. A push rod is provided below the stationary mold 4 to push the molded explosion-proof relay to be demolded.

[0031] Based on the above embodiments: the molding mechanism 8 includes a first molding block 81 and a second molding block 82, and the injection port 7 includes a first injection port 71 that connects to the first molding block 81 and extends into the molding space 63, a second injection port 72 that connects to the second molding block 82 and extends into the molding space 63, and a third injection port 73 that is located between the first injection port 71 and the second injection port 72 and extends to the support plate 61.

[0032] Based on the above embodiments: an inclined surface 83 of a forming guide slope 3 is provided on the side of the first forming block 81 and / or the second forming block 82 opposite to the forming space 63. A connecting plane 84 is also provided at the connection position between the inclined surface 83 and the first forming block 81 and / or the second forming block 82. The inclined surface 83 and the connecting plane 84 are arranged along the circumferential direction of the first forming block 81 and / or the second forming block 82.

[0033] The specific improvements mentioned above are as follows: Figures 9-11As shown, the molding mechanism 8 includes a first molding block 81 and a second molding block 82. The inclined surface 83 can effectively form the guiding inclined surface 3, and the connecting plane 84 can guide and transition between the guide inclined surface and the plane of the pressure relief plate 2. The first injection port 71 and the second injection port 72 are respectively set between the first molding block 81 and the second molding block 82. The material is injected from the first injection port 71 and the second injection port 72, which can quickly form the pressure relief plate 2. If only a third injection port 73 is opened, the pressure relief plate 2 is prone to solidification due to the slow material flow rate, which will cause the pressure relief plate 2 to fail to form.

[0034] Based on the above embodiments: a connecting block 9 is provided between the first molding block 81 and the second molding block 82. The first molding block 81 and the second molding block 82 are both fixed on the connecting block 9. The connecting block 9 is fixed on the moving mold 5 and moves vertically with the moving mold 5.

[0035] The specific improvements mentioned above are as follows: Figure 11 As shown, the first molding block 81 and the second molding block 82 can be effectively fixed by the setting of the connecting block 9. The connecting block 9 is fixed on the moving mold 5 and can effectively follow the moving mold 5 to move upward.

[0036] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An explosion-proof relay, characterized in that: It includes a body (1) and a pressure relief plate (2) disposed above the body (1). A pre-break groove (21) is provided at the connection position between the lower end face of the pressure relief plate (2) and the body (1), and a punching groove (22) is provided at the upper end face of the pressure relief plate (2).

2. The explosion-proof relay according to claim 1, characterized in that: The pressure relief plate (2) is arranged in a rectangular structure, and the pre-cut groove (21) is distributed along the circumference of the pressure relief plate (2).

3. The explosion-proof relay according to claim 2, characterized in that: A guide slope (3) is provided at the connection between the punching groove (22) and the shell, and the guide slope (3) extends from the periphery to the center.

4. A processing mold for use in any one of claims 1-3 of the explosion-proof relay, characterized in that: The processing mold includes a stationary mold (4) and a moving mold (5) disposed above the stationary mold (4). A cavity (6) for forming a relay housing is provided between the moving mold (5) and the stationary mold (4). An injection port (7) for injecting material to form the relay housing is provided on the moving mold (5). A support plate (61) and an extension block (62) for forming a pre-cut groove (21) are provided inside the cavity (6). A forming mechanism (8) for forming a punched groove (22) is also provided above the extension block (62). A forming space (63) for forming a pressure relief plate (2) is provided between the forming mechanism (8) and the extension block (62).

5. The processing mold for an explosion-proof relay according to claim 4, characterized in that: The molding mechanism (8) is fixedly mounted on the moving mold (5) and moves vertically with the moving mold (5).

6. The processing mold for an explosion-proof relay according to claim 5, characterized in that: The molding mechanism (8) includes a first molding block (81) and a second molding block (82), and the injection port (7) includes a first injection port (71) that connects to the first molding block (81) and extends into the molding space (63), a second injection port (72) that connects to the second molding block (82) and extends into the molding space (63), and a third injection port (73) that is located between the first injection port (71) and the second injection port (72) and extends to the support plate (61).

7. The processing mold for an explosion-proof relay according to claim 6, characterized in that: An inclined surface (83) of a molding guide slope (3) is provided on the side of the first molding block (81) and / or the second molding block (82) opposite to the molding space (63). A connecting plane (84) is also provided at the connection position between the inclined surface (83) and the first molding block (81) and / or the second molding block (82). The inclined surface (83) and the connecting plane (84) are arranged along the circumferential direction of the first molding block (81) and / or the second molding block (82).

8. The processing mold for an explosion-proof relay according to claim 7, characterized in that: A connecting block (9) is provided between the first molding block (81) and the second molding block (82). The first molding block (81) and the second molding block (82) are both fixed on the connecting block (9). The connecting block (9) is fixed on the moving mold (5) and moves vertically with the moving mold (5).

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