Explosion-proof permanent magnet motor with explosion-proof aviation plug

Abstract

The invention relates to an explosive-proof permanent magnet motor with an explosive-proof aviation plug, and belongs to the technical field of explosive-proof motors, the explosive-proof permanent magnet motor comprises a motor body and an explosive-proof aviation plug module, a cable leading-out end of the motor body is provided with a sealing housing, and the explosive-proof aviation plug module comprises a plug assembly which comprises a plug body and a first electric contact interface part arranged on the plug body; the explosion-proof cable gland is used for sealing and fixing an external cable; the socket assembly comprises a socket body and a second electric contact interface part arranged on the socket body, the second electric contact interface part is matched with the first electric contact interface part, and the second electric contact interface part is electrically connected with a cable lead of the motor body; the plug body is in threaded connection with the explosion-proof cable gland through the first explosion-proof thread combination surface; and the socket body is in threaded connection with the sealing housing through the second explosion-proof threaded combination surface. According to the invention, the motor body and the cable can be rapidly separated by dismounting the explosion-proof aviation plug module, and the maintenance efficiency and the explosion-proof safety in a flammable and explosive environment are improved.

Description

Technical Field

[0001] The present application relates to the field of flameproof motors, and in particular to a flameproof permanent magnet motor with a flameproof aviation plug. Background Art

[0002] The flameproof permanent magnet motor used in flammable and explosive environments (such as Zone 1 hazardous locations) has a typical structure consisting of a stator, rotor, and front and rear bearing assemblies arranged inside a square casing. The power cable needs to be directly led out through the opening in the rear cover.

[0003] During on-site maintenance, operators must remove the back cover and disconnect the internal wiring of the stator winding before they can separate the cables. Frequent cover opening not only causes repeated wear on the flameproof joint surface between the back cover and the casing, but is also likely to interfere with the positioning accuracy of the feedback components inside the casing during disassembly and assembly. If there is residual explosive gas on site, the risk of gas intrusion at the moment the cover is opened will directly threaten personnel safety. Even with a built-in terminal block structure, the back cover still needs to be opened to disconnect the cables, making it impossible to quickly separate the circuit without damaging the integrity of the motor casing. This contradiction is particularly prominent in scenarios such as mines and oil fields where equipment needs to be frequently moved, and has become a long-term technical bottleneck that restricts the maintenance efficiency and intrinsic safety level of flameproof permanent magnet motors. Summary of the Invention

[0004] In order to ensure explosion-proof safety while improving maintenance convenience, the present application provides a flameproof permanent magnet motor with a flameproof aviation plug.

[0005] The present application provides a flameproof permanent magnet motor with a flameproof aviation plug, which adopts the following technical solution:

[0006] A flameproof permanent magnet motor with a flameproof aerial plug comprises a motor body and a flameproof aerial plug module. The cable lead-out end of the motor body is provided with a sealed cover. The flameproof aerial plug module comprises:

[0007] A plug assembly comprising a plug body and a first electrical contact interface portion provided on the plug body;

[0008] Explosion-proof cable gland, used for sealing and fixing external cables;

[0009] A socket assembly comprising a socket body and a second electrical contact interface portion provided on the socket body, wherein the second electrical contact interface portion is adapted to mate with the first electrical contact interface portion and is electrically connected to a cable lead of the motor body;

[0010] The plug body is threadedly connected to the explosion-proof gland via a first explosion-proof threaded joint surface;

[0011] The socket body is threadedly connected to the sealing cover shell via a second flameproof thread joint surface.

[0012] By adopting the above technical solution, the plug body and the explosion-proof cable gland are directly connected through the first explosion-proof threaded joint surface, and the socket body is fixed to the sealed cover shell using the second explosion-proof threaded joint surface, forming a double mechanical explosion-proof barrier: it not only blocks the intrusion path of external explosive gas along the cable lead-out end of the motor body, but also ensures the physical isolation of the high-temperature components inside the motor body from the external hazardous environment; at the same time, it eliminates the shell disassembly operation required for the traditional cable direct connection solution, and only needs to remove the explosion-proof aviation plug module to achieve quick and safe separation of the motor body and the cable, greatly improving the maintenance efficiency and the intrinsic safety level of the equipment in flammable and explosive environments.

[0013] Optionally, the flameproof aviation plug module further includes an engagement sleeve, which is sleeved on the outside of the plug body and is used for dynamic cooperation with the socket body;

[0014] A flameproof joint surface is formed between the coupling sleeve and the plug body, and a third flameproof threaded joint surface is formed between the coupling sleeve and the socket body.

[0015] By adopting the above technical solution, when the coupling sleeve is rotated, the gap between its inner wall and the explosion-proof joint surface of the plug body is maintained, while the outer wall and the third explosion-proof threaded joint surface of the socket are tightened or released synchronously, so that the explosion-proof connection or separation of the plug and the socket can be completed by a single-handed rotation operation, while ensuring the explosion-proof reliability and simplifying the plug-in and unplugging operations of the explosion-proof aviation plug module.

[0016] Optionally, the third flameproof thread joint surface is configured as:

[0017] When the first electrical contact interface portion is fully engaged with the second electrical contact interface portion, the third flameproof thread joint surface has a plurality of effective engagement threads;

[0018] When the first electrical contact interface portion and the second electrical contact interface portion are just disengaged, the third flameproof thread joint surface still maintains at least a partial effective engagement number.

[0019] By adopting the above technical solution, a step-by-step safety plug-in and pull-out mechanism is formed: on the one hand, when disassembling the flameproof aviation plug-in module, the first electrical contact interface part and the second electrical contact interface part are disengaged before the third flameproof threaded joint surface is completely separated, ensuring that the electrical connection is released earlier than the explosion-proof seal, thereby avoiding the intrusion of explosive gas in the energized state; on the other hand, when plugging in the flameproof aviation plug-in module, the third flameproof threaded joint surface is completely engaged before the first electrical contact interface part and the second electrical contact interface part, ensuring that the explosion-proof seal is established earlier than the electrical connection, thereby eliminating the risk of arc ignition at the moment of plugging and unplugging.

[0020] Optionally, the explosion-proof joint surface meets the following requirements: the length is not less than 13 mm, and the maximum allowable gap does not exceed 0.2 mm.

[0021] By adopting the above technical solution, it is ensured that the flame quenching capability is better and that the internal explosion does not trigger external ignition.

[0022] Optionally, the third flameproof threaded joint surface satisfies: an engagement length of not less than 16 mm, and when the first electrical contact interface portion is fully engaged with the second electrical contact interface portion, the number of effective engagement buckles is not less than 10.

[0023] Optionally, the third flameproof threaded joint surface further satisfies the following requirement: when the first electrical contact interface portion and the second electrical contact interface portion are just disengaged, the number of effective engagement buckles thereof is not less than 6.

[0024] By adopting the above technical solution, the redundant safety factor of the third flameproof thread joint surface is enhanced, and the anti-vibration and anti-slip performance of the third flameproof thread joint surface is improved.

[0025] Optionally, the first flameproof thread joint surface meets the following requirements: the engagement length is not less than 11 mm, and the number of effective engagement buckles is not less than 6.

[0026] By adopting the above technical solution, the vibration and anti-slip properties of the first explosion-proof thread joint surface are ensured, and the explosion-proof capability of the connection between the explosion-proof cable gland and the plug body is guaranteed.

[0027] Optionally, the second flameproof thread joint surface meets the following requirements: the engagement length is not less than 11 mm, and the number of effective engagement threads is not less than 6.

[0028] By adopting the above technical solution, the anti-vibration and anti-slip performance of the second flameproof thread joint surface is ensured, and the flameproof capability of the connection between the socket body and the sealing cover is guaranteed.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. The plug body and explosion-proof cable gland are directly connected through the first flameproof threaded interface, and the socket body is fixed to the sealed cover using the second flameproof threaded interface, forming a double mechanical flameproof barrier. This not only blocks the intrusion path of external explosive gas along the cable lead-out end of the motor body, but also ensures the physical isolation of the high-temperature components inside the motor body from the external hazardous environment. At the same time, the shell disassembly operation required by traditional cable direct connection solutions is eliminated. Only the flameproof aviation plug module needs to be removed to achieve quick and safe separation of the motor body and cable, which greatly improves the maintenance efficiency and the intrinsic safety level of the equipment in flammable and explosive environments.

[0031] 2. By configuring the third explosion-proof threaded joint surface, a step-by-step safety plug-in and pull-out mechanism is formed: on the one hand, when disassembling the explosion-proof aviation plug-in module, the first electrical contact interface part and the second electrical contact interface part are disengaged before the third explosion-proof threaded joint surface is completely separated, ensuring that the electrical connection is released earlier than the explosion-proof seal, thereby avoiding the intrusion of explosive gas in the energized state; on the other hand, when plugging in the explosion-proof aviation plug-in module, the third explosion-proof threaded joint surface is fully engaged before the first electrical contact interface part and the second electrical contact interface part, ensuring that the explosion-proof seal is established earlier than the electrical connection, thereby eliminating the risk of arc ignition at the moment of plugging and unplugging.

[0032] 3. By establishing a staged safety plug-in mechanism and strengthening explosion-proof parameters in the explosion-proof aviation plug module, it meets the strict safety standards of explosive environment Zone 1 (Zone 1), providing an intrinsically safe connection solution for high-risk scenarios such as petrochemical and mining equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a cross-sectional view of a flameproof permanent magnet motor with a flameproof aviation plug according to an embodiment of the present application.

[0034] Figure 2 It is a cross-sectional view showing the connection relationship between the flameproof aviation plug module and the sealed cover in the embodiment of the present application.

[0035] Figure 3 It is a cross-sectional view showing the specific structure of the explosion-proof aviation plug module in the embodiment of the present application.

[0036] Explanation of the accompanying drawings: 1. Motor body; 2. Flameproof aviation plug module; 21. Explosion-proof cable gland; 211. First flameproof threaded joint surface; 22. Plug assembly; 221. Plug body; 222. First electrical contact interface; 23. Socket assembly; 231. Socket body; 232. Second electrical contact interface; 24. Joint sleeve; 241. Third flameproof threaded joint surface; 242. Flameproof joint surface; 3. Sealing cover; 31. Second flameproof threaded joint surface. DETAILED DESCRIPTION

[0037] The following combination Figure 1-Figure 3 , further details of this application are given.

[0038] Example:

[0039] The embodiment of the present application discloses a flameproof permanent magnet motor with a flameproof aviation plug. Figure 1 A flameproof permanent magnet motor with a flameproof aviation plug includes a motor body 1 and a flameproof aviation plug module 2. The cable lead-out end of the motor body 1 is fixed with a sealed cover 3, and the cable lead of the motor body 1 is located in the sealed cover 3; the flameproof aviation plug module 2 can be detachably fixed on the sealed cover 3, and the flameproof aviation plug module 2 is electrically connected to the cable lead of the motor body 1.

[0040] Reference Figure 2 and Figure 3 The explosion-proof aviation plug module 2 includes an explosion-proof gland 21, a plug assembly 22 and a socket assembly 23 connected in sequence: wherein the explosion-proof gland 21 is used for sealing and fixing the cable; the plug assembly 22 includes a plug body 221 and a first electrical contact interface portion 222 fixed in the plug body 221; the socket assembly 23 includes a socket body 231 and a second electrical contact interface portion 232 fixed in the socket body 231, the second electrical contact interface portion 232 is adapted to the first electrical contact interface portion 222, and the second electrical contact interface portion 232 is electrically connected to the cable lead of the motor body 1; the plug body 221 is threadedly connected to the explosion-proof gland 21 through the first explosion-proof threaded joint surface 211, and the socket body 231 is threadedly connected to the sealing cover 3 through the second explosion-proof threaded joint surface 31. To facilitate dynamic engagement with the socket body 231, an engagement sleeve 24 is provided on the outside of the plug body 221. A third flameproof threaded interface 241 is formed between the engagement sleeve 24 and the socket body 231, and a flameproof interface 242 is formed between the engagement sleeve 24 and the plug body 221. As a result, when the engagement sleeve 24 is rotated, its inner wall maintains a controlled gap with the flameproof interface 242 of the plug body 221, while its outer wall is simultaneously tightened or released with the third flameproof threaded interface 241 of the socket. This allows for explosion-proof connection or disconnection of the plug and socket with a single-handed rotation, simplifying the insertion and removal of the flameproof aviation plug module 2 while ensuring explosion-proof reliability.

[0041] Reference Figure 3 The third flameproof threaded joint surface 241 is configured as follows: when the first electrical contact interface portion 222 and the second electrical contact interface portion 232 are fully engaged, the third flameproof threaded joint surface 241 has multiple effective engagement threads; when the first electrical contact interface portion 222 and the second electrical contact interface portion 232 are just disengaged, the third flameproof threaded joint surface 241 still maintains at least a partial effective engagement thread. In this way, through the configuration setting of the third explosion-proof threaded joint surface 241, a step-by-step safety plug-in and unplugging mechanism is formed: on the one hand, when disassembling the explosion-proof aviation plug-in module 2, the first electrical contact interface part 222 and the second electrical contact interface part 232 are disconnected before the third explosion-proof threaded joint surface 241 is completely separated, ensuring that the electrical connection is released earlier than the explosion-proof seal, thereby avoiding the intrusion of explosive gas in the energized state; on the other hand, when plugging in the explosion-proof aviation plug-in module 2, the third explosion-proof threaded joint surface 241 is completely engaged before the first electrical contact interface part 222 and the second electrical contact interface part 232, thereby ensuring that the explosion-proof seal is established earlier than the electrical connection, thereby eliminating the risk of arc ignition at the moment of plugging and unplugging.

[0042] Furthermore, the third flameproof threaded joint 241 satisfies the following requirements: an engagement length of no less than 16 mm, and when the first electrical contact interface portion 222 and the second electrical contact interface portion 232 are fully engaged, the effective engagement count is no less than 10; and when the first electrical contact interface portion 222 and the second electrical contact interface portion 232 are just disengaged, the effective engagement count is no less than 6. In this embodiment, the engagement length of the third flameproof threaded joint 241 is 17 mm, and when the first electrical contact interface portion 222 and the second electrical contact interface portion 232 are fully engaged, the effective engagement count is 11; and when the first electrical contact interface portion 222 and the second electrical contact interface portion 232 are just disengaged, the effective engagement count is 7. In this way, by strengthening the redundant safety factor of the third flameproof threaded joint 241, the vibration and disengagement resistance of the third flameproof threaded joint 241 is improved. This staged design ensures that in a Zone 1 environment, electrical on / off operations are always under mechanical explosion-proof protection, eliminating the risk of arc ignition during plugging and unplugging.

[0043] Reference Figure 3 The flameproof joint surface 242 meets the following requirements: the length is not less than 13 mm, and the maximum allowable gap does not exceed 0.2 mm. In this way, the flameproof aviation plug module 2 is guaranteed to have a better flame quenching ability, ensuring that the internal explosion does not trigger external ignition.

[0044] Reference Figure 2 and Figure 3 The first and second flameproof threaded joints 211 and 31 both meet the following requirements: an engagement length of no less than 11 mm and a number of effective engagement threads of no less than 6. This ensures the vibration and disengagement resistance of the first and second flameproof threaded joints 211 and 31, and the flameproof capability of the connections between the explosion-proof cable gland 21 and the plug body 221, and between the socket body 231 and the sealing housing 3.

[0045] The various explosion-proof parameters in this embodiment meet the requirements of the current GB / T 3836.2-2021 standard for Zone 1 equipment and are compatible with the core safety parameters of GB 3836.2-2010. They can be safely used in Zone 1 hazardous areas containing explosive gases such as methane and hydrogen.

[0046] The implementation principle of an explosion-proof permanent magnet motor with an explosion-proof aviation plug in an embodiment of the present application is as follows: the present application directly connects the plug body 221 and the explosion-proof gland 21 through the first explosion-proof threaded joint surface 211, and uses the second explosion-proof threaded joint surface 31 to fix the socket body 231 to the sealing cover 3, forming a double mechanical explosion-proof barrier: it not only blocks the invasion path of external explosive gas along the cable lead-out end of the motor body 1, but also ensures the physical isolation of the high-temperature components inside the motor body 1 from the external hazardous environment; at the same time, it eliminates the shell disassembly operation required for the traditional cable direct connection solution, and only needs to disassemble the explosion-proof aviation plug module 2 to achieve rapid and safe separation of the motor body 1 and the cable, greatly improving the maintenance efficiency and the intrinsic safety level of the equipment in flammable and explosive environments.

[0047] By configuring the third explosion-proof threaded joint surface 241, a step-by-step safety plug-in and pull-out mechanism is formed: on the one hand, when disassembling the explosion-proof aviation plug-in module 2, the first electrical contact interface part 222 and the second electrical contact interface part 232 are disconnected before the third explosion-proof threaded joint surface 241 is completely separated, ensuring that the electrical connection is released earlier than the explosion-proof seal, thereby avoiding the intrusion of explosive gas in the energized state; on the other hand, when plugging in the explosion-proof aviation plug-in module 2, the third explosion-proof threaded joint surface 241 is completely engaged before the first electrical contact interface part 222 and the second electrical contact interface part 232, thereby ensuring that the explosion-proof seal is established earlier than the electrical connection, thereby eliminating the risk of arc ignition at the moment of plugging and unplugging.

[0048] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A flameproof permanent magnet motor with a flameproof aviation plug, characterized in that: The invention comprises a motor body (1) and a flameproof aviation plug module (2), wherein a cable outlet end of the motor body (1) is provided with a sealing cover (3), and the flameproof aviation plug module (2) comprises: A plug assembly (22) comprising a plug body (221) and a first electrical contact interface portion (222) provided on the plug body (221); Explosion-proof cable gland (21), used for sealing and fixing external cables; A socket assembly (23), comprising a socket body (231) and a second electrical contact interface portion (232) provided on the socket body (231), wherein the second electrical contact interface portion (232) is adapted to the first electrical contact interface portion (222), and the second electrical contact interface portion (232) is electrically connected to a cable lead of the motor body (1); The plug body (221) is threadedly connected to the explosion-proof gland (21) via a first explosion-proof threaded joint surface (211); The socket body (231) is threadedly connected to the sealing cover (3) via a second flameproof threaded joint surface (31).

2. The flameproof permanent magnet motor with a flameproof aviation plug according to claim 1 is characterized in that: The flameproof aviation plug module (2) further includes a coupling sleeve (24), which is sleeved on the outside of the plug body (221) and is used for dynamic matching with the socket body (231); A flameproof joint surface (242) is formed between the joint sleeve (24) and the plug body (221), and a third flameproof threaded joint surface (241) is formed between the joint sleeve (24) and the socket body (231).

3. The flameproof permanent magnet motor with flameproof aviation plug according to claim 2 is characterized in that: The third flameproof thread joint surface (241) is configured as follows: When the first electrical contact interface portion (222) and the second electrical contact interface portion (232) are fully engaged, the third flameproof threaded joint surface (241) has a plurality of effective engagement threads; When the first electrical contact interface portion (222) and the second electrical contact interface portion (232) are just disengaged, the third flameproof threaded joint surface (241) still maintains at least a partial effective engagement number.

4. The flameproof permanent magnet motor with flameproof aviation plug according to claim 2 is characterized in that: The flameproof joint surface (242) meets the following requirements: the length is not less than 13 mm, and the maximum allowable gap does not exceed 0.2 mm.

5. The flameproof permanent magnet motor with flameproof aviation plug according to claim 3 is characterized in that: The third flameproof threaded joint surface (241) satisfies the following requirements: an engagement length of not less than 16 mm, and when the first electrical contact interface portion (222) and the second electrical contact interface portion (232) are fully engaged, the number of effective engagement buckles is not less than 10.

6. The flameproof permanent magnet motor with flameproof aviation plug according to claim 5, characterized in that: The third flameproof threaded joint surface (241) also satisfies the following requirement: when the first electrical contact interface portion (222) and the second electrical contact interface portion (232) are just disengaged, the number of effective engagement buckles is not less than 6.

7. The flameproof permanent magnet motor with flameproof aviation plug according to claim 1, characterized in that: The first flameproof thread joint surface (211) meets the following requirements: the meshing length is not less than 11 mm, and the number of effective meshing threads is not less than 6.

8. The flameproof permanent magnet motor with flameproof aviation plug according to claim 1, characterized in that: The second flameproof thread joint surface (31) satisfies the following requirements: the meshing length is not less than 11 mm, and the number of effective meshing buckles is not less than 6.

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