Anti-backflow quick-connection plug device

Abstract

The utility model relates to an anti-backflow quick-connection plug device, and belongs to the technical field of quick-connection plug devices. The female plug is in plug-in fit with the male plug; the auxiliary operating part is arranged on the female plug, a common end, a normally open contact and a normally closed contact are arranged on the auxiliary operating part, the common end is electrically conducted with the plug end of the female plug, the normally open contact is used for being connected with an emergency power supply, and the normally closed contact is used for being connected with a mains supply. According to the invention, the auxiliary operation member is arranged on the female plug, when the commercial power is interrupted, an operator switches power supply to the emergency power supply through the switch, the normally open contact is connected with the common end, the normally closed contact is disconnected with the common end, and the emergency power supply and the commercial power cannot be connected at the same time through physical isolation. The risk of reverse current generated when the emergency power supply is connected to the power grid is avoided, and power supply safety is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of quick plug devices, in particular to a reverse current prevention quick plug device. BACKGROUND

[0002] The emergency power supply is composed of a charger, an inverter, a storage battery, an isolation transformer, a switching switch and the like, which is a kind of power supply for converting DC power into AC power. When industrial and civil buildings are in an emergency state, it can supply power to the electrical equipment.

[0003] The existing emergency power supply connector includes a male plug and a female plug. After the male plug and the female plug are plugged in place, the quick connection of the emergency power supply can be realized. However, when the emergency power supply is connected to the power grid, if the mains power is not completely disconnected, it may be possible to reverse the power supply to the power grid through the connector, thereby causing the possibility of electric shock or equipment damage. CONTENT OF THE UTILITY MODEL

[0004] In order to reduce the possibility of reverse power supply to the power grid by the emergency power supply and ensure power supply safety, the present application provides a reverse current prevention quick plug device.

[0005] The reverse current prevention quick plug device provided by the present application adopts the following technical solution:

[0006] A reverse current prevention quick plug device comprises:

[0007] a male plug;

[0008] a female plug, which is plugged and adapted with the male plug;

[0009] an auxiliary operating member provided on the female plug, wherein a common end, a normally open contact and a normally closed contact are provided on the auxiliary operating member, the common end is electrically connected with the plug-in end of the female plug, the normally open contact is used for connecting the emergency power supply, and the normally closed contact is used for connecting the mains power.

[0010] By adopting the above technical solution, the common end, the normally open contact and the normally closed contact are provided on the auxiliary operating member, so as to facilitate the auxiliary operating member and the external operating rod or operating button to form a single-pole double-throw switch. On the other hand, the auxiliary operating member is installed on the female plug, on the one hand, it is convenient to manually switch the circuit between the "mains power supply" and the "emergency power supply", and on the other hand, when the mains power is interrupted, the operating personnel can quickly switch to the emergency power supply, and ensure that the key equipment is continuously powered. When the mains power is interrupted, the operating personnel switches the power supply to the emergency power supply through the switch, the normally open contact is connected with the common end, and the normally closed contact is disconnected with the common end, so as to ensure that the emergency power supply and the mains power cannot be connected at the same time through physical isolation, thereby avoiding the risk of reverse current when the emergency power supply is connected to the power grid, and ensuring the safety of power supply.

[0011] Optionally, the auxiliary operating member is provided with a positioning plug-in part, and the female plug is provided with a positioning plug-in slot matched with the positioning plug-in part.

[0012] By adopting the above technical scheme, the auxiliary operating member can be fixedly assembled to the specified position of the female plug, and the assembly efficiency and assembly accuracy of the plug device are improved.

[0013] Optionally, the auxiliary operating member is a plastic shell structure.

[0014] By adopting the above technical scheme, the auxiliary operating member serves as a fixed carrier of the common terminal, the normally open contact and the normally closed contact, and is provided as a plastic shell structure, so that the auxiliary operating member has a certain structural strength while reducing the weight, and is beneficial to the light weight of the product.

[0015] Optionally, the female plug is provided with a fixed panel, the fixed panel is provided with a through hole for the female plug to penetrate, one side of the fixed panel close to the plug-in end of the female plug is provided with a protective cover, and the protective cover is movably connected or detachably connected with the fixed panel.

[0016] By adopting the above technical scheme, the plug-in end of the female plug can be covered and protected by the protective cover, and the waterproof and dustproof effects of the plug device are improved.

[0017] Optionally, one end of the protective cover is hinged to the fixed panel.

[0018] By adopting the above technical scheme, when in use, the protective cover needs to be turned over so that the protective cover is in an open state, so that the plug-in end of the male plug and the female plug can be plugged in, and the use is convenient.

[0019] Optionally, the female plug is provided with a limiting part and a limiting ring, one side of the limiting part abuts against the fixed panel, and the other side of the limiting ring abuts against the fixed panel.

[0020] By adopting the above technical scheme, the limiting part and the limiting ring can limit the two sides of the fixed panel, reduce the possibility of displacement of the fixed panel and the female plug, and ensure the fixing effect of the fixed panel.

[0021] Optionally, the limiting part is integrally formed with the female plug, and the limiting ring is detachably connected with the female plug.

[0022] By adopting the above technical scheme, when the fixed panel is assembled, the female plug is penetrated through the through hole, and then the fixed panel is fixed between the limiting part and the limiting ring through the limiting ring, so that the assembly of the fixed panel is realized.

[0023] Optionally, the female plug is provided with an external thread, and the inner circle of the limiting ring is provided with an internal thread matched with the external thread.

[0024] By adopting the technical scheme, the limiting ring is connected with the female threaded connection, the structure is simple, and the assembly of the panel is facilitated.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. By providing a common terminal, a normally open contact and a normally closed contact on the auxiliary operating member, the auxiliary operating member and the external operating lever or operating button form a single-pole double-throw switch. By adding the auxiliary operating member to the female plug, on the one hand, the circuit can be manually switched between "mains power supply" and "emergency power supply", and when the mains power fails, the emergency power supply can be quickly switched to ensure continuous power supply for critical equipment; on the other hand, when the mains power is interrupted, the operator switches the power supply to the emergency power supply through the switch, the normally open contact is connected to the common terminal, and the normally closed contact is disconnected from the common terminal, thereby ensuring that the emergency power supply and the mains power cannot be connected at the same time, thereby avoiding the risk of reverse current when the emergency power supply is connected to the power grid, and ensuring the safety of power supply.

[0027] 2. By providing the positioning plug-in part and the positioning plug-in slot, the auxiliary operating member can be fixed and assembled to the specified position of the female plug, thereby improving the assembly efficiency and accuracy of the plug device.

[0028] 3. By providing the fixed panel and the protective cover, the plug-in end of the female plug can be covered and protected by the protective cover, thereby improving the waterproof and dustproof effect of the plug device. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic diagram of the overall structure of a reverse flow prevention quick plug device according to an embodiment of the present application.

[0030] Figure 2 is a schematic diagram of the specific structure of the female plug according to an embodiment of the present application.

[0031] Figure 3 is a schematic diagram of the specific structure of the auxiliary operating member according to an embodiment of the present application.

[0032] Figure 4 is a schematic diagram of the internal structure of the auxiliary operating member according to an embodiment of the present application.

[0033] Figure 5 is an exploded view of the assembly relationship between the female plug, the auxiliary operating member and the fixed panel according to an embodiment of the present application.

[0034] Explanation of reference signs: 1, male plug; 2, female plug; 21, positioning plug-in slot; 22, limiting part; 23, limiting ring; 231, internal thread; 24, external thread; 3, auxiliary operating member; 31, common end; 32, normally open contact; 33, normally closed contact; 34, positioning plug-in part; 4, fixed panel; 41, through hole; 5, protective cover; 51, tongue. DETAILED DESCRIPTION

[0035] The following will be described in detail in combination with the accompanying drawings. Figures 1-5 The present application will be further described in detail.

[0036] Embodiment:

[0037] The embodiment of the present application discloses an anti-reverse flow quick plug device. Referring to Figures 1-4 An anti-reverse flow quick plug device, comprising a male plug 1 and a female plug 2 adapted to be plugged with the male plug 1, the female plug 2 being provided with a plug-in end for plugging with the male plug 1. In order to improve the safety of the plug device, an auxiliary operating member 3 is fixedly arranged on the female plug 2, and the auxiliary operating member 3 is provided with three auxiliary contacts, namely a common end 31, a normally open contact 32 and a normally closed contact 33, wherein the common end 31 is electrically connected with the plug-in end of the female plug 2, the normally open contact 32 is used for connecting an emergency power supply, and the normally closed contact 33 is used for connecting a mains.

[0038] In use, by arranging the common end 31, the normally open contact 32 and the normally closed contact 33 on the auxiliary operating member 3, the auxiliary operating member 3 and the external operating rod or operating button form a single-pole double-throw switch. By additionally arranging the auxiliary operating member 3 on the female plug 2, on the one hand, the circuit can be manually switched between the "mains power supply" and the "emergency power supply", and when the mains fails, the emergency power supply can be quickly switched to ensure that the key equipment is continuously powered; on the other hand, when the mains is interrupted, the operator switches the power supply to the emergency power supply through the switch, the normally open contact 32 is connected with the common end 31, and at the same time, the normally closed contact 33 is disconnected with the common end 31, so that the emergency power supply and the mains cannot be connected at the same time through physical isolation, thereby avoiding the risk of reverse current when the emergency power supply is connected to the power grid, and ensuring the safety of power supply.

[0039] Referring to Figures 4-5 In order to facilitate the fixing and assembly of the auxiliary operating member 3 to the specified position on the female plug 2, improve the assembly efficiency and assembly precision of the plug device, a positioning plug-in part 34 is integrally formed on the auxiliary operating member 3, and a positioning plug-in slot 21 adapted to the positioning plug-in part 34 is formed on the female plug 2.

[0040] Referring to Figure 4The auxiliary operating member 3 is a plastic shell structure, so that the auxiliary operating member 3 serves as a fixed carrier of the common terminal 31, the normally open contact 32 and the normally closed contact 33, and is arranged as a plastic shell structure, so as to have a certain structural strength while reducing the weight, and facilitate the light weight of the product.

[0041] With reference to Figure 2 and Figure 5 The female plug 2 is fixedly provided with a fixed panel 4, the fixed panel 4 is provided with a through hole 41 for the female plug 2 to pass through, and the fixed panel 4 is provided with a protective cover 5 on the side close to the plug-in end of the female plug 2, and the protective cover 5 is movably connected or detachably connected with the fixed panel 4. The plug-in end of the female plug 2 can be covered and protected by the protective cover 5, thereby improving the waterproof and dustproof effect of the plug device.

[0042] With reference to Figure 1 and Figure 2 Further, in the embodiment, one end of the protective cover 5 is hinged to the fixed panel 4, and the other end of the protective cover 5 is integrally provided with a pull tongue 51, the pull tongue 51 protrudes from the outer contour of the fixed panel 4, and the operator can easily turn the protective cover 5. In use, after the protective cover 5 is turned over, the protective cover 5 is in an open state, thereby facilitating the plug-in of the male plug 1 and the plug-in end of the female plug 2, and facilitating use.

[0043] With reference to Figure 1 , Figure 2 and Figure 5 The female plug 2 is further provided with a limiting portion 22 and a limiting ring 23, and the limiting portion 22 abuts against one side of the fixed panel 4, and the limiting ring 23 abuts against the other side of the fixed panel 4. In this way, the limiting portion 22 and the limiting ring 23 can limit the two sides of the fixed panel 4, reduce the possibility of displacement of the fixed panel 4 and the female plug 2, and ensure the fixing effect of the fixed panel 4.

[0044] With reference to Figure 1 , Figure 2 and Figure 5 The limiting portion 22 is integrally formed with the female plug 2, the female plug 2 is provided with an external thread 24 on the outer side, and the limiting ring 23 is provided with an internal thread 231 on the inner circle, which is matched with the external thread 24. In this way, the limiting ring 23 is threadedly connected with the female plug 2, thereby achieving detachable connection. When assembling the fixed panel 4, after the female plug 2 passes through the through hole 41, the fixed panel 4 is fixed between the limiting portion 22 and the limiting ring 23 through the limiting ring 23, thereby achieving the assembly of the fixed panel 4, and the assembly structure is simple, and the assembly of the fixed panel 4 and the protective cover 5 is facilitated.

[0045] The implementation principle of the anti-reverse current quick plug device is as follows: when the device is used, the common end 31, the normally open contact 32 and the normally closed contact 33 are arranged on the auxiliary operating member 3, so that the auxiliary operating member 3 and the external operating rod or operating button form a single-pole double-throw switch. The auxiliary operating member 3 is additionally arranged on the female plug 2, on one hand, the circuit can be manually switched between the "mains power supply" and the "emergency power supply", when the mains power fails, the emergency power supply can be quickly switched to ensure that the key equipment is continuously powered; on the other hand, when the mains power is interrupted, the operator switches the power supply to the emergency power supply through the switch, the normally open contact 32 is conducted with the common end 31, and the normally closed contact 33 is disconnected with the common end 31, the emergency power supply and the mains power cannot be conducted at the same time through physical isolation, thereby avoiding the risk of reverse current when the emergency power supply is connected to the power grid, and ensuring the safety of power supply.

[0046] The above are preferred embodiments of the present application, but do not limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A reverse flow preventing quick connector device, characterized by, Include: Male plug (1); Female plug (2), which is plugged with the male plug (1); Auxiliary operating member (3) is provided on the female plug (2), the auxiliary operating member (3) is provided with a common end (31), a normally open contact (32) and a normally closed contact (33), wherein the common end (31) is electrically connected with the plug end of the female plug (2), the normally open contact (32) is used for connecting emergency power supply, and the normally closed contact (33) is used for connecting mains.

2. A quick connect plug device according to claim 1, wherein: The auxiliary operating member (3) is provided with a positioning plug part (34), and the female plug (2) is provided with a positioning plug groove (21) matched with the positioning plug part (34).

3. A quick connector device according to claim 1, wherein: The auxiliary operating member (3) is a plastic shell structure.

4. A quick connector device according to claim 1, wherein: The female plug (2) is provided with a fixed panel (4), the fixed panel (4) is provided with a through hole (41) for the female plug (2) to pass through, and the fixed panel (4) is provided with a protective cover (5) on the side close to the plug end of the female plug (2). The protective cover (5) is movably connected or detachably connected with the fixed panel (4).

5. A quick connect plug assembly according to claim 4, wherein: One end of the protective cover (5) is hinged to the fixed panel (4).

6. A quick connector device according to claim 4, wherein: The female plug (2) is provided with a limiting part (22) and a limiting ring (23), the limiting part (22) abuts against one side of the fixed panel (4), and the limiting ring (23) abuts against the other side of the fixed panel (4).

7. A quick connect plug assembly according to claim 6, wherein: The limiting part (22) is integrally formed with the female plug (2), and the limiting ring (23) is detachably connected with the female plug (2).

8. A quick connector device according to claim 7, wherein: The female plug (2) is provided with an external thread (24), and the inner circle of the limiting ring (23) is provided with an internal thread (231) matched with the external thread (24). The female plug (2) is provided with an external thread (24), and the inner circle of the limiting ring (23) is provided with an internal thread (231) matched with the external thread (24).

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